CN206816570U - Passive type wave compensating device - Google Patents

Abstract

The utility model discloses a passive wave compensation device, which comprises a control unit, a compensation execution unit, a sensor unit and an oil supply control unit; wherein, the sensor unit includes a position sensor arranged on an accumulator and a piston of a hydraulic oil cylinder; the sensor unit The data output terminal of the control unit is connected to the data acquisition terminal of the control unit, the first fuel supply control terminal of the control unit is connected to the first controlled terminal of the fuel supply control unit, and the second fuel supply control terminal of the control unit is connected to the second control unit of the fuel supply control unit. The controlled end, the first exhaust control end of the control unit is connected to the control signal input end of the exhaust module arranged at the exhaust port of the high-pressure working gas cylinder; The piston is adjusted to a proper initial position, which simplifies the adjustment process, increases the accuracy of the adjustment, and effectively improves the working efficiency.

Description

Passive heave compensation device

technical field

The utility model relates to the field of wave compensation, in particular to a passive wave compensation device.

Background technique

During offshore drilling operations, the drilling ship and the hook will produce periodic heave movements under the action of sea waves, and correspondingly, the drill string will also produce corresponding heave movements, which will cause changes in drilling pressure, which may cause the drill bit to break away Bottom of the well, so that the drilling operation is suspended, and may even damage the drill bit, resulting in huge economic losses. For this reason, in the prior art, passive wave compensating devices are often added to the drilling equipment to solve the above problems.

The passive heave compensation device is a device that relies on the lifting force of sea waves and the gravity of the drilling ship itself to control the movement of the piston rod in its hydraulic cylinder, thereby compressing and releasing the gas in its accumulator to compensate the heave displacement of the hook Passive heave compensation device. Usually, before the passive heave compensation device performs heave compensation, it is necessary to complete the preparatory work, that is, to charge the accumulator, the high-pressure working gas cylinder and the hydraulic cylinder in the device with air and oil respectively, so that the piston of the accumulator and the hydraulic cylinder Adjust the piston to the proper initial position.

In the existing passive heave compensation device, the user needs to observe the position of the piston, and manually control the relevant valves according to the current position of the piston, so as to realize the adjustment of the initial position of the piston. However, there are many deficiencies in the existing technology. For example, in the adjustment process, the user usually needs to adjust the valve repeatedly. The deviation of the piston position will affect the normal use of the device. More seriously, if the user does not operate properly, it may cause dangerous accidents.

Contents of the invention

The technical problem to be solved by the utility model is to provide a passive wave compensation device, which can automatically adjust the accumulator and the piston in the hydraulic oil cylinder to a suitable initial position.

In order to solve the above technical problems, the utility model proposes a passive wave compensation device, which includes a control unit, a compensation execution unit, a sensor unit and an oil supply control unit;

The control unit has a first fuel supply control terminal, a second fuel supply control terminal, a first exhaust control terminal and a data collection terminal;

The compensation execution unit includes a first accumulator, a second accumulator, a high-pressure working gas cylinder, an exhaust module, and a first hydraulic cylinder and a second hydraulic cylinder symmetrically arranged at both ends of the hook, and the first The hydraulic oil cylinder and the second hydraulic oil cylinder are arranged in parallel; the first hydraulic oil cylinder includes a first rodless chamber oil port, a first piston and a first piston rod for connecting the hook, and the second hydraulic oil cylinder It includes a second rodless chamber oil port, a second piston and a second piston rod for connecting the hook; the first rodless chamber oil port is connected to the high-pressure working gas cylinder through the first accumulator The gas inlet and outlet of the second rodless chamber is connected to the gas inlet and outlet of the high-pressure working gas cylinder through the second accumulator; the exhaust port of the high-pressure working gas cylinder is connected to the exhaust module the air inlet of the exhaust module; the control signal input end of the exhaust module is connected to the first exhaust control end of the control unit;

The sensor unit has a data output end, and the data output end is connected to the data acquisition end of the control unit; the sensor unit includes a first position sensor disposed on the piston of the first accumulator, a first position sensor disposed on the a second position sensor on the piston of the second accumulator, a third position sensor on the first piston and a fourth position sensor on the second piston;

The oil supply control unit has a first controlled end, a second controlled end, a first oil outlet, a second oil outlet and an oil inlet for connecting the first oil outlet of the oil pump, the first The controlled end is connected to the first oil supply control end of the control unit, the second controlled end is connected to the second oil supply control end of the control unit, and the first oil outlet is connected to the first rodless cavity oil port, the second oil outlet is connected to the second rodless cavity oil port.

Preferably, the exhaust module includes an electric control valve for a working gas cylinder and an exhaust valve for a working gas cylinder;

The air inlet of the working gas cylinder electric control valve is the air inlet of the exhaust module, the gas outlet of the working gas cylinder electric control valve is connected to the working gas cylinder exhaust valve, and the working gas cylinder electric The control signal input end of the control valve is the control signal input end of the exhaust module.

Preferably, the control unit is a PLC controller.

Preferably, the compensation execution unit further includes a first safety isolation valve and a second safety isolation valve; the control unit also has an isolation control terminal;

The first safety isolation valve is arranged between the oil port of the first rodless chamber and the first accumulator, and the control signal input end of the first safety isolation valve is connected to the isolation control unit of the control unit terminal; the second safety isolation valve is arranged between the oil port of the second rodless chamber and the second accumulator, and the control signal input end of the second safety isolation valve is connected to the control unit Isolate the console.

Preferably, the passive wave compensation device further includes an inflation control unit; the inflation control unit includes a working gas conduction valve, a working gas pressure regulating valve, and a general air inlet for connecting the air outlet of the air compressor;

The general air inlet is sequentially connected to the gas inlet and outlet of the high-pressure working gas cylinder through the working gas conduction valve and the working gas pressure regulating valve.

Preferably, the inflation control unit further includes a first control gas valve, a second control gas valve, a control gas pressure regulating valve, a low pressure control gas cylinder, a third control gas valve, a first electric control valve and a first pneumatic actuator The control unit also has an inflation control terminal; the first pneumatic actuator is used to control the opening and closing of the working gas conduction valve;

The total air inlet is sequentially connected to the gas inlet and outlet of the high-pressure working gas cylinder through the working gas conduction valve and the working gas pressure regulating valve, specifically:

The total air inlet is connected to the air inlet of the working gas conduction valve through the first control air valve, and the total air inlet is also connected to the inlet of the control gas pressure regulating valve through the second control air valve. gas port; the low-pressure gas outlet of the control gas regulator valve is connected to the gas inlet and outlet of the low-pressure control gas cylinder; the gas inlet and outlet of the low-pressure control gas cylinder are also connected to the first gas inlet and outlet through the third control gas valve The air inlet of the electric control valve; the gas outlet of the first electric control valve is connected to the working gas conduction valve through the first pneumatic actuator, and the gas outlet of the working gas conduction valve passes through the working gas The pressure regulating valve is connected to the gas inlet and outlet of the high-pressure working gas cylinder; the control signal input end of the first electric control valve is connected to the inflation control end of the control unit.

Preferably, the inflation control unit also includes a fourth control air valve, a second electric control valve, a second pneumatic actuator and a working exhaust valve; the control unit also includes a second exhaust control terminal;

The air inlet of the working exhaust valve is connected to the air inlet of the working gas conduction valve; the gas inlet and outlet of the low-pressure control gas cylinder are also connected to the second electric control valve through the fourth control air valve The air inlet of the second electric control valve is connected to the switch port of the working exhaust valve through the second pneumatic actuator; the control signal input end of the second electric control valve is connected to the control Unit's second exhaust control terminal.

Preferably, the fuel supply control unit further includes a first pressure regulating relief valve, a one-way pilot valve, a first filter, a second filter and a first electro-hydraulic reversing valve;

The oil inlet of the first pressure regulating and relief valve is the first oil inlet of the oil supply control unit, and the oil outlet of the first pressure regulating and relief valve is connected to the The oil inlet of the first filter, the oil return port of the first pressure regulating and relief valve is connected to the oil inlet of the second filter; the oil outlet of the second filter is used to connect to the oil tank; The oil outlet of the first filter is connected to the oil inlet of the first electro-hydraulic reversing valve; the first oil outlet of the first electro-hydraulic reversing valve is the first outlet of the oil supply control unit oil port, the second oil outlet of the first electro-hydraulic directional valve is the second oil outlet of the oil supply control unit, the first control signal input port of the first electro-hydraulic directional valve is the The first controlled terminal of the fuel supply control unit, the second control signal input terminal of the first electro-hydraulic directional valve is the second controlled terminal of the fuel supply control unit.

Preferably, the oil supply control unit further includes a second oil inlet for connecting to the second oil outlet of the oil pump; the oil supply control unit also includes a second pressure regulating and relief valve;

The oil inlet of the second pressure regulating and relief valve is the second oil inlet of the oil supply control unit, and the oil outlet of the second pressure regulating and relief valve is connected to the oil inlet of the first filter The oil return port of the second pressure regulating and relief valve is connected to the oil inlet port of the second filter.

Preferably, the oil supply control unit further includes a second oil inlet for connecting the second oil outlet of the oil pump; the first hydraulic cylinder also has a first rod chamber oil port, and the second hydraulic cylinder It also has a second rod chamber oil port;

The control unit also has a third fuel supply control terminal and a fourth fuel supply control terminal;

The oil supply control unit also has a third oil outlet, a fourth oil outlet, a third controlled end, and a fourth controlled end; the third oil outlet is connected to the first rod chamber oil port, The fourth oil outlet is connected to the second rod chamber oil port, the third controlled end is connected to the third oil supply control end of the control unit, and the fourth controlled end is connected to the control unit The fourth fuel supply control terminal;

The oil supply control unit includes a third pressure regulating relief valve, a fourth pressure regulating relief valve, a third filter, a fourth filter, a second electro-hydraulic reversing valve and a third electro-hydraulic reversing valve; The oil inlet of the third pressure regulating and relief valve is the first oil inlet of the oil supply control unit, and the oil outlet of the third pressure regulating and relief valve is connected to the oil inlet of the third filter , the oil return port of the third pressure regulating and relief valve is connected to the oil inlet of the fourth filter; the oil inlet of the fourth pressure regulating and relief valve is the second oil inlet of the oil supply control unit The oil outlet of the fourth pressure regulating and relief valve is connected to the oil inlet of the third filter, and the oil return port of the fourth pressure regulating and relief valve is connected to the inlet of the fourth filter. oil port; the oil outlet of the fourth filter is used to connect to the oil tank; the oil outlet of the third filter is connected to the oil inlet of the second electro-hydraulic directional valve and the third electro-hydraulic directional valve The oil inlet of the directional valve; the first oil outlet of the second electro-hydraulic directional valve is the first oil outlet of the oil supply control unit, and the second oil outlet of the second electro-hydraulic directional valve The port is the third oil outlet of the oil supply control unit, the first control signal input port of the second electro-hydraulic directional valve is the first controlled end of the oil supply control unit, and the second electric The second control signal input end of the hydraulic directional valve is the third controlled end of the oil supply control unit; the first oil outlet of the third electro-hydraulic directional valve is the second controlled end of the oil supply control unit. oil outlet, the second oil outlet of the third electro-hydraulic directional valve is the fourth oil outlet of the oil supply control unit, the first control signal input port of the third electro-hydraulic directional valve is The second controlled terminal of the fuel supply control unit, the second control signal input terminal of the third electro-hydraulic reversing valve is the fourth controlled terminal of the fuel supply control unit.

Implementing the utility model has the following beneficial effects:

The passive wave compensation device provided by the utility model is provided with a control unit, a compensation execution unit, a sensor unit and an oil supply control unit; wherein, the sensor unit includes a position sensor arranged on the piston of the accumulator and the hydraulic cylinder; the sensor unit The data output terminal is connected to the data acquisition terminal of the control unit, the first fuel supply control terminal of the control unit is connected to the first controlled terminal of the fuel supply control unit, and the second fuel supply control terminal of the control unit is connected to the second controlled terminal of the fuel supply control unit. Control terminal, the first exhaust control terminal of the control unit is connected to the control signal input terminal of the exhaust module arranged at the exhaust port of the high-pressure working gas cylinder; it can be seen that in the utility model, the position sensor collects the energy accumulator in real time. and the position information of the piston in the hydraulic cylinder, the control unit controls the work of the exhaust module and the oil supply control unit according to the collected position information, thereby controlling the volume of hydraulic oil and working gas in the accumulator and hydraulic cylinder, which can automatically The accumulator and the piston in the hydraulic cylinder can be accurately adjusted to the appropriate initial position, which simplifies the adjustment process, increases the accuracy of the adjustment, and effectively improves the working efficiency.

Description of drawings

Fig. 1 is a principle schematic diagram of an embodiment of a passive heave compensation device provided by the present invention.

Fig. 2 is a schematic diagram of the principle of another embodiment of the passive heave compensation device provided by the present invention.

detailed description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. example. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In practical application, the drilling ship is provided with a drilling platform, and the wave compensation device is installed on the derrick of the drilling platform, and the wave compensation device is connected to the drill string through a hook; in addition, the wave compensation device needs to be connected to an oil pump, an oil tank And an air compressor, wherein the oil pump is used to provide hydraulic oil for the heave compensating device, the oil tank is used to store hydraulic oil, and the air compressor is used to supply gas of corresponding pressure to the heave compensating device.

Please refer to Fig. 1, which is a schematic diagram of the principle of an embodiment of the passive heave compensating device provided by the utility model (connected with a hook, an oil pump, an oil tank and an air compressor).

The passive wave compensation device provided by the embodiment of the utility model includes a control unit 10, a compensation execution unit, a sensor unit and an oil supply control unit 40;

The control unit 10 has a first fuel supply control terminal, a second fuel supply control terminal, a first exhaust control terminal and a data collection terminal;

The compensation execution unit includes a first accumulator 201, a second accumulator 202, a high-pressure working gas cylinder 203, an exhaust module 204, and a first hydraulic cylinder and a second hydraulic cylinder symmetrically arranged at both ends of the hook 60, And the first hydraulic cylinder and the second hydraulic cylinder are arranged in parallel; the first hydraulic cylinder includes a first rodless chamber oil port 2051, a first piston 2052 and a first piston for connecting the hook 60 Rod 2053, the second hydraulic cylinder includes a second rodless chamber oil port 2061, a second piston 2062 and a second piston rod 2063 for connecting the hook 60; the first rodless chamber oil port 2051 passes through The first accumulator 201 is connected to the gas inlet and outlet of the high-pressure working gas cylinder 203, and the second rodless chamber oil port 2061 is connected to the gas of the high-pressure working gas cylinder 203 through the second accumulator 202. Import and export; the exhaust port of the high-pressure working gas cylinder 203 is connected to the air inlet of the exhaust module 204; the control signal input end of the exhaust module 204 is connected to the first exhaust control end of the control unit 10 ;

The sensor unit has a data output end, and the data output end is connected to the data acquisition end of the control unit 10; the sensor unit includes a first position sensor 301 arranged on the piston of the first accumulator 201, The second position sensor 302 disposed on the piston of the second accumulator 202, the third position sensor 303 disposed on the first piston 2052 and the fourth position sensor disposed on the second piston 2062 304;

The oil supply control unit 40 has a first controlled end, a second controlled end, a first oil outlet, a second oil outlet and an oil inlet for connecting the first oil outlet of the oil pump 70, the The first controlled end is connected to the first oil supply control end of the control unit 10, the second controlled end is connected to the second oil supply control end of the control unit 10, and the first oil outlet is connected to the The first rodless chamber oil port 2051 (in Fig. 1 and Fig. 2, the connection relationship is represented by two A symbols), and the second oil outlet is connected to the second rodless chamber oil port 2061 (in Fig. 1 and in Fig. 2, the connection relationship is represented by two B labels).

It should be noted that, in practical applications, the bottom of the cylinder body of the first hydraulic cylinder and the bottom of the cylinder body of the second hydraulic cylinder are installed on the derrick 80 of the drilling platform, and the first hydraulic cylinder and The second hydraulic cylinder is arranged in parallel, and the first hydraulic cylinder and the second hydraulic cylinder are symmetrically arranged at both ends of the hook 60, and the first piston rod 2053 of the first hydraulic cylinder is connected to the One end of the hook 60 is connected to the other end of the hook 60 with the second piston rod 2063 of the second hydraulic cylinder. It can be seen that when the first piston rod 2053 and the second piston rod 2063 move correspondingly, they can exert a corresponding force on the big hook 60 to drive the big hook 60 to produce a corresponding movement, thereby compensating The heave displacement of the hook 60 due to sea waves.

In the embodiment of the present utility model, in the compensation execution unit, the first accumulator 201 includes a gas chamber, a hydraulic oil chamber, a piston, a gas inlet and outlet, and a fluid inlet and outlet; the first hydraulic cylinder The rodless chamber oil port 2051 is located on the side wall of the rodless chamber of the first hydraulic cylinder; the rodless chamber of the first hydraulic cylinder and the hydraulic oil chamber of the first accumulator 201 pass through the first The rodless chamber oil port 2051, the fluid inlet and outlet of the first accumulator 201, and the oil pipe between the two are connected, the gas chamber of the first accumulator 201 and the gas in the high-pressure working gas cylinder 203 The cavity communicates through the gas inlet and outlet of the first accumulator 201 , the gas inlet and outlet of the high-pressure working gas cylinder 203 , and the gas pipe between them. In addition, the gas inlet and outlet of the first accumulator 201 are also provided with a first working gas valve 209 and a first exhaust valve 210; the first working gas valve 209 is used to control the first accumulator 201 and external gas pipeline communication and isolation; the first exhaust valve 210 is used to discharge the gas in the gas chamber of the first accumulator 201 when necessary, for example, when the heave compensation device finishes working To avoid dangerous accidents caused by the high-pressure gas in the first accumulator 201. Moreover, a first discharge valve 211 is also provided at the common connection end of the fluid inlet and outlet of the first accumulator 201 and the first rodless chamber oil port 2051 of the first hydraulic cylinder, for use when necessary The hydraulic oil in the hydraulic oil cavity of the first accumulator 201 and the hydraulic oil in the rodless cavity of the first hydraulic oil cylinder are discharged. Correspondingly, the second accumulator 202 includes a gas chamber, a hydraulic oil chamber, a piston, a gas inlet and outlet, and a fluid inlet and outlet; the second rodless chamber oil port 2061 of the second hydraulic cylinder is located at the second hydraulic pressure On the side wall of the rodless chamber of the oil cylinder; the rodless chamber of the second hydraulic cylinder and the hydraulic oil chamber of the second accumulator 202 pass through the second rodless chamber oil port 2061, the second accumulator The fluid inlet and outlet of the accumulator 202, and the oil pipe between the two, the gas chamber of the second accumulator 202 and the gas chamber of the high-pressure working gas cylinder 203 pass through the gas of the second accumulator 202 The inlet and outlet, the gas inlet and outlet of the high-pressure working gas cylinder 203, and the gas pipe between the two are connected. In addition, the gas inlet and outlet of the second accumulator 202 are also provided with a second working gas valve 212 and a second exhaust valve 213; the second working gas valve 212 is used to control the 202 and the external gas pipeline; the second exhaust valve 213 is used to discharge the gas in the gas chamber of the second accumulator 202 when necessary, for example, when the heave compensation device finishes working to avoid dangerous accidents caused by the high-pressure gas in the second accumulator 202 . Moreover, a second discharge valve 214 is also provided at the common connection end of the fluid inlet and outlet of the second accumulator 202 and the second rodless cavity oil port 2061 of the second hydraulic cylinder, for use when necessary The hydraulic oil in the hydraulic oil cavity of the second accumulator 202 and the hydraulic oil in the rodless cavity of the second hydraulic oil cylinder are discharged.

In the embodiment of the present utility model, the gas inlet and outlet of the high-pressure working gas cylinder 203 are also provided with a third working gas valve 215, which is used to control the communication of the gas passage between the high-pressure working gas cylinder 203 and external devices. and partition. The gas inlet and outlet of the high-pressure working gas cylinder 203 is also provided with a working gas pressure sensor 305 for collecting the pressure of the working gas in the compensation execution unit.

The working principle of the passive wave compensation device provided by the embodiment of the utility model is as follows:

The first position sensor 301 arranged on the piston of the first accumulator 201, the second position sensor 302 arranged on the piston of the second accumulator 202, and the first piston 2052 The third position sensor 303 of the second piston 2062 and the fourth position sensor 304 arranged on the second piston 2062 respectively collect the position information of the corresponding piston, the control unit 10 reads the position information, and controls all the pistons according to the position information The first oil outlet of the oil supply control unit 40 communicates with the oil inlet, or the second oil outlet communicates with the oil inlet, so as to control the injection into the first accumulator 201 and the first hydraulic cylinder The amount of hydraulic oil in the hydraulic oil, and the oil amount of the hydraulic oil injected into the second accumulator 202 and the second hydraulic oil cylinder, at the same time, according to the position information to control the The exhaust module 204 at the exhaust port of 203 is opened or closed, thereby controlling the volume of the high-pressure gas in the high-pressure working gas cylinder 203, thereby controlling the volume of the high-pressure gas in the gas chamber of the first accumulator 201 and the volume of high-pressure gas in the gas chamber of the second accumulator 202, so that the first accumulator 201, the second accumulator 202, the first hydraulic cylinder and the second The piston in the hydraulic cylinder is adjusted to a suitable initial position, that is, the middle position of the stroke.

The passive wave compensation device provided by the embodiment of the utility model is provided with a control unit 10, a compensation execution unit, a sensor unit and an oil supply control unit 40; wherein the sensor unit includes a position sensor arranged on the piston of the accumulator and the hydraulic cylinder The data output terminal of the sensor unit is connected to the data acquisition terminal of the control unit 10, the first fuel supply control terminal of the control unit 10 is connected to the first controlled terminal of the fuel supply control unit 40, and the second fuel supply control terminal of the control unit 10 is connected to The second controlled end of the oil supply control unit 40, the first exhaust control end of the control unit 10 is connected to the control signal input end of the exhaust module 204 arranged at the exhaust port of the high-pressure working gas cylinder 203; it can be seen that in this In the utility model, the position sensor collects the position information of the accumulator and the piston in the hydraulic cylinder in real time, and the control unit 10 controls the operation of the exhaust module 204 and the oil supply control unit 40 according to the collected position information, thereby controlling the accumulator The volume of hydraulic oil and working gas in the hydraulic cylinder can automatically adjust the accumulator and the piston in the hydraulic cylinder to the appropriate initial position. The adjustment process does not require the user to observe the real-time position of the piston with the naked eye, and does not require manual control by the user , simplifies the adjustment process, increases the accuracy of adjustment, and effectively improves work efficiency.

In addition, it should be noted that when the drilling ship produces heave motion under the action of sea waves, the passive wave compensation device provided by the embodiment of the utility model will perform passive compensation to compensate the heave of the hook 60 due to the action of sea waves Displacement, the working process of the passive compensation will be described in detail below.

When the drilling ship moves upward under the action of sea waves, the first piston rod 2053 of the first hydraulic cylinder, the second piston rod 2063 of the second hydraulic cylinder and the hook 60 all move upward instantaneously, because The hook 60 moves upwards, and the upward pulling force of the hook 60 on the drill string connected to it increases, so the downward force of the hook 60 on the first piston rod 2053 and the second piston rod 2063 increases. As the pressure increases, a pressure difference will be generated between the upper and lower ends of the first piston 2052 in the first hydraulic cylinder, that is, the balance will be lost, so that the first piston 2052 in the first hydraulic cylinder moves downward, that is, the first piston 2052 in the first hydraulic cylinder moves downward, that is, the first A piston rod 2053 moves downward, and similarly, the second piston rod 2063 also moves downward, thereby driving the large hook 60 to move downward to compensate for the upward displacement of the large hook 60 due to the action of sea waves. Moreover, when the first piston rod 2053 and the second piston rod 2063 move downward, the hydraulic oil in the rodless chamber of the first hydraulic cylinder and the hydraulic oil in the rodless chamber of the second hydraulic cylinder The oil is respectively pressed into the hydraulic oil chamber of the first accumulator 201 and the hydraulic oil chamber of the second accumulator 202, the piston of the first accumulator 201 and the hydraulic oil chamber of the first accumulator 201 When the pistons all move upward, the volume of the working gas in the first accumulator 201 , the second accumulator 202 and the high-pressure working gas cylinder 203 is compressed, and the pressure is increased, so as to achieve the oil-gas pressure balance after compensation.

When the drilling ship moves downward under the action of sea waves, the first piston rod 2053 of the first hydraulic cylinder, the second piston rod 2063 of the second hydraulic cylinder and the hook 60 all move downward instantaneously , due to the downward movement of the hook 60, the upward pulling force of the hook 60 on the drill string connected to it is reduced, so that the hook 60 exerts a strong force on the first piston rod 2053 and the second piston rod 2063 When the downward pressure decreases, the upper and lower ends of the first piston 2052 in the first hydraulic cylinder will produce a pressure difference, that is, out of balance, the first accumulator 201, the second accumulator 202 and The pressure of the working gas in the high-pressure working gas cylinder 203 decreases, the volume expands, the piston of the first accumulator 201 moves downward, and the hydraulic oil in the hydraulic oil chamber of the first accumulator 201 is Pressed into the rodless cavity of the first passive hydraulic cylinder, the first piston rod 2053 moves upwards, similarly, the second piston rod 2063 also moves upwards, thereby driving the hook 60 to move upwards, To compensate the downward displacement of the hook 60 due to the action of sea waves, and achieve the oil-gas pressure balance after compensation.

In a preferred embodiment, the exhaust module 204 includes a working gas cylinder electric control valve 2041 and a working gas cylinder exhaust valve 2042;

The air inlet of the working gas cylinder electric control valve 2041 is the air inlet of the exhaust module 204, and the gas outlet of the working gas cylinder electric control valve 2041 is connected to the working gas cylinder exhaust valve 2042. The control signal input end of the working gas cylinder electric control valve 2041 is the control signal input end of the exhaust module 204 .

In this embodiment, the exhaust module 204 is used to exhaust the gas in the high-pressure working gas cylinder 203 when necessary, for example, to exhaust the high-pressure working gas cylinder 203 before performing wave compensation, To adjust the initial positions of the first accumulator 201, the second accumulator 202, the first hydraulic cylinder and the piston of the second hydraulic cylinder, for another example, at the end of the passive heave compensation device During operation, the gas in the high-pressure working gas cylinder 203 is discharged to avoid dangerous accidents caused by the high-pressure gas in the high-pressure working gas cylinder 203 . Specifically, when the gas in the high-pressure working gas cylinder 203 needs to be discharged, the first exhaust control terminal of the control unit 10 outputs a corresponding control signal to the control signal input of the electric control valve 2041 of the working gas cylinder. At the end, the electric control valve 2041 of the working gas cylinder controls the opening of the exhaust valve 2042 of the working gas cylinder, so as to discharge the gas in the high-pressure working gas cylinder 203 , and vice versa. Moreover, in this embodiment, the exhaust of the high-pressure working gas cylinder 203 can be controlled more precisely.

In a preferred embodiment, the control unit 10 is a PLC controller.

In this embodiment, the PLC controller is configured to analyze the data collected by the sensor unit and generate corresponding control instructions. It can be understood that, in other optional embodiments, the control unit 10 may also include a microcontroller and a switch; the microcontroller is connected to the switch through a field bus, and the switch passes through the field The PLC controller is connected in the form of a bus, specifically, the microcontroller is used to analyze the data collected by the sensor unit and generate corresponding control instructions, and the switch is used to realize the forwarding of the data and the control instructions , the PLC controller is used to implement data format conversion, and in physical form, the PLC controller in the control unit 10 is electrically connected to the corresponding valves and corresponding sensors in the device.

In a preferred embodiment, the compensation execution unit further includes a first safety isolation valve 207 and a second safety isolation valve 208; the control unit 10 also has an isolation control terminal;

The first safety isolation valve 207 is arranged between the first rodless chamber oil port 2051 and the first accumulator 201, and the control signal input end of the first safety isolation valve 207 is connected to the control The isolation control end of the unit 10; the second safety isolation valve 208 is arranged between the second rodless chamber oil port 2061 and the second accumulator 202, and the control of the second safety isolation valve 208 The signal input terminal is connected to the isolated control terminal of the control unit 10 .

In this embodiment, the first safety isolation valve 207 and the second safety isolation valve 208 are added. When the first piston rod 2053 and the second piston rod 2063 lose load suddenly, the control unit The isolation control terminal of 10 outputs corresponding control signals to the first safety isolation valve 207 and the second safety isolation valve 208, the first safety isolation valve 207 and the second safety isolation valve 208 are closed, and all The oil passage between the first accumulator 201 and the first hydraulic cylinder, and the oil passage between the second accumulator 202 and the second hydraulic cylinder, that is, the first accumulator 201 can no longer press hydraulic oil into the first hydraulic cylinder, and the second accumulator 202 can no longer press hydraulic oil into the second hydraulic cylinder, which can effectively prevent the first piston rod 2053 from The flying out of the first hydraulic cylinder, and the second piston rod 2063 flying out of the second hydraulic cylinder enhance the safety and reliability of the passive heave compensation device.

In a preferred embodiment, the passive heave compensation device further includes an inflation control unit 50; the inflation control unit 50 includes a working gas conduction valve 501, a working gas pressure regulating valve 502 and an The total inlet gas_in of the gas outlet;

The general air inlet gas_in is connected to the gas inlet and outlet of the high-pressure working gas cylinder 203 through the working gas conduction valve 501 and the working gas pressure regulating valve 502 in sequence.

It should be noted that before the heave compensation, the first accumulator 201, the second accumulator 202 and the high-pressure working gas cylinder 203 in the passive heave compensation device need to be charged with air.

In this embodiment, when inflation is required, the user manually opens the working gas conduction valve 501, and the high-pressure gas output by the air compressor 90 is decompressed to meet the preset pressure through the working gas pressure regulating valve 502. After the threshold high-pressure gas is charged, it is charged into the first accumulator 201 , the second accumulator 202 and the high-pressure working gas cylinder 203 .

In a preferred embodiment, the oil supply control unit 40 further includes a first pressure regulating relief valve 401, a one-way pilot valve 402, a first filter 403, a second filter 404 and a first electro-hydraulic Directional valve 405;

The oil inlet of the first pressure regulating and relief valve 401 is the first oil inlet of the oil supply control unit 40, and the oil outlet of the first pressure regulating and relief valve 401 passes through the one-way pilot valve 402 is connected to the oil inlet of the first filter 403, and the oil return port of the first pressure regulating and relief valve 401 is connected to the oil inlet of the second filter 404; the outlet of the second filter 404 The oil port is used to connect to the oil tank 100; the oil outlet of the first filter 403 is connected to the oil inlet of the first electro-hydraulic reversing valve 405; the first oil outlet of the first electro-hydraulic reversing valve 405 The port is the first oil outlet of the oil supply control unit 40, the second oil outlet of the first electro-hydraulic reversing valve 405 is the second oil outlet of the oil supply control unit 40, and the first The first control signal input end of an electro-hydraulic reversing valve 405 is the first controlled end of the oil supply control unit 40, and the second control signal input end of the first electro-hydraulic reversing valve 405 is the first controlled end of the oil supply control unit 405. The second controlled terminal of the oil control unit 40 .

Further, the oil supply control unit 40 also includes a second oil inlet for connecting to the second oil outlet of the oil pump 70; the oil supply control unit 40 also includes a second pressure regulating and relief valve 406;

The oil inlet of the second pressure regulating and relief valve 406 is the second oil inlet of the oil supply control unit 40, and the oil outlet of the second pressure regulating and relief valve 406 is connected to the first filter 403 , and the oil return port of the second pressure regulating and relief valve 406 is connected to the oil inlet of the second filter 404 .

It should be noted that before performing heave compensation, the first accumulator 201, the second accumulator 202, the first hydraulic cylinder and the second hydraulic cylinder in the passive heave compensation device need to be filled with oil.

It should be noted that the second oil outlet of the oil pump 70 is the oil supply port of the compensation execution unit, and the flow rate is relatively large, which is used to supply the first accumulator 201 and the second accumulator 202 , the first hydraulic cylinder and the second hydraulic cylinder provide working oil, the third oil outlet of the oil pump 70 is the oil supply port of the compensation execution unit, the flow rate is small, and it is used in the first When the hydraulic oil in the first accumulator 201 , the second accumulator 202 , the first hydraulic oil cylinder or the second hydraulic oil cylinder leaks or is lost, the hydraulic oil is replenished.

In this embodiment, both the first hydraulic cylinder and the second hydraulic cylinder are hydraulic cylinders filled with oil on one side, that is, there is only one oil port on the first hydraulic cylinder, that is, the first rodless chamber oil port 2051, the first rodless chamber oil port 2051 is located on the side wall of the rodless chamber of the first hydraulic cylinder, and the structure of the second hydraulic cylinder is the same as that of the first hydraulic cylinder, which will not be repeated here .

In this embodiment, the first pressure regulating relief valve 401 and the second pressure regulating relief valve 406 are used to limit the oil pressure, so as to prevent the oil pressure of the hydraulic oil supplied to the compensation execution unit from being too high; Specifically, the first pressure regulating and relief valve 401 has a first preset oil pressure threshold, when the oil pressure of the hydraulic oil flowing into the oil inlet of the first pressure regulating and relief valve 401 is higher than the first When the oil pressure threshold is preset, the oil inlet port and the oil return port of the first pressure regulating relief valve 401 are connected, and part of the hydraulic oil passes through the oil return port of the first pressure regulating relief valve 401 and the second oil return port. The filter 404 flows back to the oil tank 100; similarly, the second pressure regulating and relief valve 406 has a second preset oil pressure threshold, when the hydraulic oil flowing into the oil inlet of the second pressure regulating and relief valve 406 When the oil pressure is higher than the second preset oil pressure threshold, the oil inlet port of the second pressure regulating relief valve 406 is connected to the oil return port, and part of the hydraulic oil passes through the port of the second pressure regulating relief valve 406. The oil return port and the second filter 404 flow back to the oil tank 100 . The first filter 403 and the second filter 404 are used to filter out foreign particles in the hydraulic oil. The first electro-hydraulic directional valve 405 is a three-position four-way electro-hydraulic directional valve, and the first electro-hydraulic directional valve 405 has a first control signal input end, a second control signal input end, an oil inlet, a second An oil outlet and a second oil outlet, when the first control signal input terminal has a corresponding electrical signal input, the first oil outlet communicates with the oil inlet, and the second oil outlet It is isolated from the oil inlet, and when the second control signal input terminal has a corresponding electrical signal input, the second oil outlet communicates with the oil inlet, and the first oil outlet communicates with the Oil inlet partition.

The working principle of the first fuel supply control unit 40 is described in detail below:

In actual use, the oil inlet of the first pressure regulating and relief valve 401 is connected to the second oil outlet of the oil pump 70, and the oil inlet of the second pressure regulating and relief valve 406 is connected to the second oil outlet of the oil pump 70. Three oil outlets, the oil inlet of the oil pump 70 and the oil outlet of the second filter 404 are used to connect to the oil tank 100 .

When it is necessary to charge the first accumulator 201 and the first hydraulic cylinder, the first oil supply control terminal of the control unit 10 outputs a corresponding control signal to the first electro-hydraulic reversing valve 405 The first control signal input terminal of the first electro-hydraulic reversing valve 405 communicates with its oil inlet, and the hydraulic oil flowing out of the second oil outlet of the oil pump 70 passes through the first The oil inlet ports of the pressure regulating relief valve 401, the first filter 403, and the first electro-hydraulic reversing valve 405 flow to the first oil outlet of the first electro-hydraulic reversing valve 405, thereby providing The first accumulator 201 and the first hydraulic cylinder are filled with oil; when the second accumulator 202 and the second hydraulic cylinder need to be filled with oil, the second oil supply control of the control unit 10 Output corresponding control signal to the second control signal input end of the first electro-hydraulic reversing valve 405, the second oil outlet of the first electro-hydraulic reversing valve 405 communicates with its oil inlet, the The hydraulic oil flowing out of the second oil outlet of the oil pump 70 flows through the first pressure regulating and relief valve 401 , the first filter 403 and the oil inlet of the first electro-hydraulic reversing valve 405 to the first The second oil outlet of an electro-hydraulic reversing valve 405 is used to charge the second accumulator 202 and the second hydraulic cylinder with oil. In the above process, if the oil pressure of the hydraulic oil flowing out of the second oil outlet of the oil pump 70 is higher than the first preset oil pressure threshold of the first pressure regulating and relief valve 401, part of the hydraulic oil will pass through the The oil return port of the first pressure regulating and relief valve 401 and the second filter 404 flow back to the oil tank 100 .

In addition, during the working process, if it is necessary to replenish hydraulic oil for the first accumulator 201 and the first hydraulic cylinder, the first oil supply control terminal of the control unit 10 outputs a corresponding control signal to the The first control signal input end of the first electro-hydraulic reversing valve 405, the first oil outlet of the first electro-hydraulic reversing valve 405 communicates with its oil inlet, and the third oil outlet of the oil pump 70 flows out The hydraulic oil flows through the second pressure-regulating relief valve 406, the first filter 403 and the oil inlet port of the first electro-hydraulic reversing valve 405 to the first part of the first electro-hydraulic reversing valve 405 An oil outlet, so as to replenish hydraulic oil for the first accumulator 201 and the first hydraulic cylinder; if it is necessary to replenish hydraulic oil for the second accumulator 202 and the second hydraulic cylinder, the The second oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second control signal input terminal of the first electro-hydraulic reversing valve 405, and other working processes are similar and will not be repeated here. In the above process, if the oil pressure of the hydraulic oil flowing out of the third oil outlet of the oil pump 70 is higher than the second preset oil pressure threshold of the second pressure regulating and relief valve 406, part of the hydraulic oil will pass through the The oil return port of the second pressure regulating and relief valve 406 and the second filter 404 flow back to the oil tank 100 .

In another preferred embodiment, the oil supply control unit 40 also includes a second oil inlet for connecting the second oil outlet of the oil pump 70; the first hydraulic cylinder also has a first rod chamber Oil port, the second hydraulic cylinder also has a second rod chamber oil port;

The control unit 10 also has a third fuel supply control terminal and a fourth fuel supply control terminal;

The oil supply control unit 40 also has a third oil outlet, a fourth oil outlet, a third controlled end, and a fourth controlled end; the third oil outlet is connected to the first rod chamber oil port , the fourth oil outlet is connected to the second rod chamber oil port, the third controlled end is connected to the third oil supply control end of the control unit 10, and the fourth controlled end is connected to the The fourth oil supply control terminal of the control unit 10;

The oil supply control unit 40 includes a third pressure regulating relief valve, a fourth pressure regulating relief valve, a third filter, a fourth filter, a second electro-hydraulic reversing valve and a third electro-hydraulic reversing valve; The oil inlet of the third pressure regulating and relief valve is the first oil inlet of the oil supply control unit 40, and the oil outlet of the third pressure regulating and relief valve is connected to the inlet of the third filter. oil port, the oil return port of the third pressure regulating and relief valve is connected to the oil inlet of the fourth filter; the oil inlet of the fourth pressure regulating and relief valve is the oil supply control unit 40 The second oil inlet, the oil outlet of the fourth pressure regulating and relief valve is connected to the oil inlet of the third filter, and the oil return port of the fourth pressure regulating and relief valve is connected to the fourth filter The oil inlet of the filter; the oil outlet of the fourth filter is used to connect the oil tank 100; the oil outlet of the third filter is connected to the oil inlet of the second electro-hydraulic reversing valve and the first The oil inlet of the three electro-hydraulic reversing valves; the first oil outlet of the second electro-hydraulic reversing valve is the first oil outlet of the oil supply control unit 40, and the second electro-hydraulic reversing valve The second oil outlet of the oil supply control unit 40 is the third oil outlet, and the first control signal input port of the second electro-hydraulic directional valve is the first controlled output port of the oil supply control unit 40. end, the second control signal input end of the second electro-hydraulic directional valve is the third controlled end of the oil supply control unit 40; the first oil outlet of the third electro-hydraulic directional valve is the The second oil outlet of the oil supply control unit 40, the second oil outlet of the third electro-hydraulic reversing valve is the fourth oil outlet of the oil supply control unit 40, the third electro-hydraulic reversing valve The first control signal input end of the directional valve is the second controlled end of the oil supply control unit 40, and the second control signal input end of the third electro-hydraulic directional valve is the second controlled end of the oil supply control unit 40. Four controlled terminals. (not shown)

In this embodiment, both the first hydraulic cylinder and the second hydraulic cylinder are hydraulic cylinders filled with oil on both sides, that is, the first hydraulic cylinder has two oil ports—the first rodless chamber oil port 2051 and the first rod chamber oil port, the first rod chamber oil port 2051 is located on the side wall of the rodless chamber of the first hydraulic cylinder, and the first rod chamber oil port is located in the first rod chamber On the side wall of the rod cavity of the first hydraulic cylinder, the structure of the second hydraulic cylinder is the same as that of the first hydraulic cylinder, and will not be repeated here.

It should be noted that before performing heave compensation, the first accumulator 201, the second accumulator 202, the first hydraulic cylinder and the second hydraulic cylinder in the passive heave compensation device need to be filled with oil.

It should be noted that the second oil outlet of the oil pump 70 is the oil supply port of the compensation unit, and has a relatively large flow rate, which is used to supply the first accumulator 201, the second accumulator 202, The first hydraulic oil cylinder and the second hydraulic oil cylinder provide working oil, and the third oil outlet of the oil pump 70 is the oil supply port of the compensation unit, with a relatively small flow rate, which is used to When the hydraulic oil in the accumulator 201, the second accumulator 202, the first hydraulic cylinder or the second hydraulic cylinder leaks or is lost, the hydraulic oil is replenished.

In this embodiment, the third pressure regulating and relief valve and the fourth pressure regulating and relief valve are used to limit the oil pressure, so as to prevent the oil pressure of the hydraulic oil supplied to the compensation unit from being too high; specifically, The third pressure regulating and relief valve has a third preset oil pressure threshold, when the oil pressure of the hydraulic oil flowing into the oil inlet of the third pressure regulating and relief valve is higher than the third preset oil pressure threshold , the oil inlet and oil return port of the third pressure regulating and relief valve are connected, and part of the hydraulic oil flows back to the oil tank 100 through the oil return port of the third pressure regulating and relief valve and the fourth filter; Similarly, the fourth pressure regulating and relief valve has a fourth preset oil pressure threshold, when the oil pressure of the hydraulic oil flowing into the oil inlet of the fourth pressure regulating and relief valve is higher than the fourth preset When the oil pressure threshold is reached, the oil inlet and oil return port of the fourth pressure regulating and relief valve are connected, and part of the hydraulic oil flows back through the oil return port of the fourth pressure regulating and relief valve and the fourth filter. Fuel tank 100. The third filter and the fourth filter are used to filter out foreign particles in the hydraulic oil. The second electro-hydraulic directional valve is a three-position four-way electro-hydraulic directional valve, and the second electro-hydraulic directional valve has a first control signal input end, a second control signal input end, an oil inlet, a first outlet The oil port and the second oil outlet, when the first control signal input end has a corresponding control signal input, the first oil outlet communicates with the oil inlet, and the second oil outlet communicates with the The oil inlet is cut off. When the second control signal input terminal has a corresponding control signal input, the second oil outlet communicates with the oil inlet, and the first oil outlet communicates with the oil inlet. The structure and working principle of the second electro-hydraulic directional valve are the same as those of the second electro-hydraulic directional valve, and will not be repeated here.

The working principle of the second oil supply control unit 40 is described in detail below:

In actual use, the oil inlet of the third pressure regulating and relief valve is connected to the second oil outlet of the oil pump 70, and the oil inlet of the fourth pressure regulating and relief valve is connected to the third outlet of the oil pump 70. An oil port, the oil inlet of the oil pump 70 and the oil outlet of the fourth filter are used to connect to the oil tank 100 .

When it is necessary to fill the rodless chamber of the first hydraulic cylinder and the first accumulator 201 with oil, the first oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second electrohydraulic The first control signal input end of the reversing valve, the first oil outlet of the first electro-hydraulic reversing valve 405 communicates with its oil inlet, and the hydraulic oil flowing out of the second oil outlet of the oil pump 70 passes through the The oil inlet port of the third pressure regulating relief valve, the third filter and the second electro-hydraulic reversing valve flows to the first oil outlet of the second electro-hydraulic reversing valve, so as to provide the The rodless cavity of the first hydraulic cylinder and the first accumulator 201 are filled with oil; when the second accumulator 202 and the rodless cavity of the second hydraulic cylinder need to be filled with oil, the control unit The second oil supply control terminal controlled by 10 outputs a corresponding control signal to the first control signal input terminal of the third electro-hydraulic directional valve, and other working processes are similar and will not be repeated here.

When the rod cavity of the first hydraulic cylinder needs to be filled with oil, the third oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second control signal input of the second electro-hydraulic reversing valve end, the second oil outlet of the second electro-hydraulic reversing valve communicates with its oil inlet, and the hydraulic oil flowing out of the second oil outlet of the oil pump 70 passes through the third pressure regulating relief valve, the The third filter and the oil inlet of the second electro-hydraulic reversing valve flow to the second oil outlet of the second electro-hydraulic reversing valve, thereby filling the rod chamber of the first hydraulic cylinder with oil ; When the rod cavity of the second oil cylinder needs to be filled with oil, the fourth oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second control signal input of the third electro-hydraulic directional valve terminal, and other working processes are similar, and will not be repeated here.

In addition, during the working process, if it is necessary to replenish hydraulic oil for the first accumulator 201 and the rodless chamber of the first hydraulic cylinder, the first oil supply control terminal of the control unit 10 outputs a corresponding control The signal is sent to the first control signal input end of the second electro-hydraulic directional valve, the first oil outlet of the second electro-hydraulic directional valve communicates with its oil inlet, and the third oil outlet of the oil pump 70 The hydraulic oil flowing out of the port flows to the first outlet of the second electro-hydraulic directional valve through the third pressure-regulating relief valve, the third filter, and the oil inlet port of the second electro-hydraulic directional valve. oil port, so as to supplement hydraulic oil to the rodless chamber of the first accumulator 201 and the first hydraulic cylinder; When replenishing hydraulic oil, the second oil supply control terminal of the control unit 10 outputs a corresponding control signal to the first control signal input terminal of the third electro-hydraulic directional valve, and other working processes are similar, and will not be repeated here. . During this process, if the oil pressure of the hydraulic oil flowing out of the third oil outlet of the oil pump 70 is higher than the third preset oil pressure threshold of the third pressure regulating and relief valve, part of the hydraulic oil will pass through the The oil return port of the third pressure regulating and relief valve and the fourth filter flow back to the oil tank 100 .

If it is necessary to supplement hydraulic oil to the rod cavity of the first hydraulic cylinder, the third oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second control signal of the second electro-hydraulic reversing valve At the input end, the second oil outlet of the second electro-hydraulic reversing valve communicates with its oil inlet, and the hydraulic oil flowing out of the third oil outlet of the oil pump 70 passes through the third pressure regulating relief valve, The oil inlet port of the third filter and the second electro-hydraulic reversing valve flows to the second oil outlet port of the second electro-hydraulic reversing valve, so that the first accumulator 201 and the The rodless cavity of the first hydraulic oil cylinder replenishes hydraulic oil; during this process, if the oil pressure of the hydraulic oil flowing out of the third oil outlet of the oil pump 70 is higher If the oil pressure threshold is set, part of the hydraulic oil flows back to the oil tank 100 through the oil return port of the third pressure regulating and relief valve and the fourth filter. When it is necessary to supplement hydraulic oil to the rod chamber of the second hydraulic cylinder, the fourth oil supply control terminal of the control unit 10 outputs a corresponding control signal to the second control signal input of the third electro-hydraulic reversing valve terminal, and other working processes are similar, and will not be repeated here.

Please refer to Figure 2, which is a schematic diagram of the principle of another embodiment of the passive heave compensation device provided by the present invention (connected with a hook, an oil pump, an oil tank and an air compressor), the heave compensation device provided by this embodiment is in the above embodiment On the basis of the above, the inflation control unit 50 is further optimized, as follows:

Further, the inflation control unit 50 also includes a first control gas valve 503, a second control gas valve 504, a control gas pressure regulating valve 505, a low pressure control gas cylinder 506, a third control gas valve 507, a first electric control valve 508 and a first pneumatic actuator 509; the control unit 10 also has an inflation control terminal; the first pneumatic actuator 509 is used to control the opening and closing of the working gas conduction valve 501;

The total air inlet gas_in is sequentially connected to the gas inlet and outlet of the high-pressure working gas cylinder 203 through the working gas conduction valve 501 and the working gas pressure regulating valve 502, specifically:

The total air inlet gas_in is connected to the air inlet of the working gas conduction valve 501 through the first control gas valve 503 , and the total air inlet gas_in is also connected to the control gas through the second control gas valve 504 The air inlet of the pressure regulating valve 505; the low-pressure gas outlet of the control gas pressure regulating valve 505 is connected to the gas inlet and outlet of the low-pressure control gas cylinder 506; the gas inlet and outlet of the low-pressure control gas cylinder 506 also pass through the first Three control gas valves 507 are connected to the air inlet of the first electric control valve 508; the air outlet of the first electric control valve 508 is connected to the working gas conduction valve 501 through the first pneumatic actuator 509, so The gas outlet of the working gas conduction valve 501 is connected to the gas inlet and outlet of the high-pressure working gas cylinder 203 through the working gas pressure regulating valve 502; the control signal input end of the first electric control valve 508 is connected to the control unit 10's inflatable control end.

In the above-mentioned embodiments, when inflation is required, the user needs to manually open the working gas conduction valve 501. However, high-pressure working gas is a dangerous energy source. Careless operation may cause dangerous accidents and directly endanger users.

Therefore, in this embodiment, the inflation control unit 50 is added to the passive heave compensation device. In practical applications, the air compressor 90 is connected to the general air inlet gas_in, before charging the passive heave compensation device (that is, the first accumulator 201, the second accumulator 202 and the high-pressure working gas cylinder 203), open the second control gas valve 504, and the high-pressure gas output by the air compressor 90 is decompressed through the control gas pressure regulating valve 505 to meet the first preset After the low-pressure gas reaches the pressure threshold, it is charged into the low-pressure control gas cylinder 506 to complete the inflation work of the low-pressure control gas cylinder 506 . When it is necessary to inflate the passive heave compensation device, the first control air valve 503 and the third control air valve 507 are opened, and then the inflation control terminal of the control unit 10 outputs a corresponding control signal to the The control signal input end of the first electric control valve 508, the first electric control valve 508 conducts, and the low-pressure gas in the low-pressure control gas cylinder 506 reaches the first pneumatic actuator through the first electric control valve 508 509, so as to control the first pneumatic actuator 509 to open the working gas conduction valve 501, after that, the high-pressure gas output by the air compressor 90 passes through the first control gas valve 503 and the working gas in sequence The conduction valve 501 reaches the working gas pressure regulating valve 502, and after the working gas pressure regulating valve 502 reduces the pressure to a high-pressure gas that meets the preset pressure threshold, it is charged into the first accumulator 201, the In the second accumulator 202 and the high-pressure working gas cylinder 203 . In this embodiment, low-pressure gas is used as the control gas to control the inflation process of the passive heave compensation device, which effectively improves the safety and stability of the heave compensation device, and high-pressure gas is used as the first energy storage The working gas of the device 201 and the second accumulator 202 effectively increases the elastic potential energy of the working gas, thereby effectively improving the load carrying capacity of the passive heave compensation device.

Further, the inflation control unit 50 also includes a fourth control air valve 510, a second electric control valve 511, a second pneumatic actuator 512 and a working exhaust valve 513; the control unit 10 also includes a second exhaust valve Control terminal;

The air inlet of the working exhaust valve 513 is connected to the air inlet of the working gas conduction valve 501; the gas inlet and outlet of the low-pressure control gas cylinder 506 are also connected to the first The air inlet of the second electric control valve 511, the air outlet of the second electric control valve 511 is connected to the switch port of the working exhaust valve 513 through the second pneumatic actuator 512; the second electric control valve 511 The control signal input end of the control unit is connected to the second exhaust control end of the control unit 10 .

It should be noted that in this embodiment, on the basis of the previous embodiment, an exhaust circuit is added in the inflation control unit 50 to exhaust the passive heave compensation device. Specifically, when the passive heave compensation device needs to exhaust, the fourth control air valve 510 is opened, and then the second exhaust control terminal of the control unit 10 outputs a corresponding control signal to the second electric circuit. The control signal input end of the control valve 511, the second electric control valve 511 conducts, the low-pressure gas in the low-pressure control gas cylinder 506 reaches the second pneumatic actuator 512 through the second electric control valve 511, Thus controlling the second pneumatic actuator 512 to open the working exhaust valve 513, after that, the high-pressure gas in the first accumulator 201, the second accumulator 202 and the high-pressure working gas cylinder 203 It is discharged through the working gas pressure regulating valve 502 , the working gas conduction valve 501 and the working exhaust valve 513 in sequence. In this embodiment, low-pressure gas is used as the control gas, and the high-pressure working gas in the first accumulator 201, the second accumulator 202, and the high-pressure working gas cylinder 203 can be discharged when necessary, such as wave compensation When the device finishes working, the probability of dangerous accidents is greatly reduced, and the safety performance of the device is improved.

The passive wave compensation device provided by the utility model is provided with a control unit, a compensation execution unit, a sensor unit and an oil supply control unit; wherein, the sensor unit includes a position sensor arranged on the piston of the accumulator and the hydraulic cylinder; the sensor unit The data output terminal is connected to the data acquisition terminal of the control unit, the first fuel supply control terminal of the control unit is connected to the first controlled terminal of the fuel supply control unit, and the second fuel supply control terminal of the control unit is connected to the second controlled terminal of the fuel supply control unit. Control terminal, the first exhaust control terminal of the control unit is connected to the control signal input terminal of the exhaust module arranged at the exhaust port of the high-pressure working gas cylinder; it can be seen that in the utility model, the position sensor collects the energy accumulator in real time. and the position information of the piston in the hydraulic cylinder, the control unit controls the work of the exhaust module and the oil supply control unit according to the collected position information, thereby controlling the volume of hydraulic oil and working gas in the accumulator and hydraulic cylinder, which can automatically The accumulator and the piston in the hydraulic cylinder can be accurately adjusted to the appropriate initial position, which simplifies the adjustment process, increases the accuracy of the adjustment, and effectively improves the work efficiency.

The above is a preferred embodiment of the present utility model, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present utility model, some improvements and deformations can also be made, these improvements and deformations It is also regarded as the protection scope of the present utility model.

Claims (10)

1. a kind of passive type wave compensating device, it is characterised in that including control unit, compensation execution unit, sensor unit With oil-feeding control unit；

Described control unit has the first oil-feeding control end, the second oil-feeding control end, first exhaust control terminal and data collection terminal；

The compensation execution unit includes the first accumulator, the second accumulator, high-pressure work gas cylinder, exhaust module and symmetrically set Put the first hydraulic jack and the second hydraulic jack at the both ends of hook, and first hydraulic jack and second hydraulic oil Cylinder be arranged in parallel；First hydraulic jack include the first rodless cavity hydraulic fluid port, first piston and for connecting the hook the One piston rod, second hydraulic jack include the second rodless cavity hydraulic fluid port, second piston and for connecting the hook second Piston rod；The first rodless cavity hydraulic fluid port connects the gas inlet and outlet of the high-pressure work gas cylinder by first accumulator, The second rodless cavity hydraulic fluid port connects the gas inlet and outlet of the high-pressure work gas cylinder by second accumulator；The high pressure The exhaust outlet of work gas cylinder connects the air inlet of the exhaust module；Described in the control signal input connection of the exhaust module The first exhaust control terminal of control unit；

The sensor unit has data output end, the data acquisition end of the data output end connection described control unit； The sensor unit include be arranged on the piston of first accumulator first position sensor, be arranged on described second Second place sensor on the piston of accumulator, the 3rd position sensor being arranged on the first piston and it is arranged on institute State the 4th position sensor in second piston；

The oil-feeding control unit has the first controlled end, the second controlled end, the first oil-out, the second oil-out and for connecting The oil inlet of first oil-out of oil pump, the first oil-feeding control end of the first controlled end connection described control unit are described Second controlled end connects the second oil-feeding control end of described control unit, and first oil-out connects the first rodless cavity oil Mouthful, second oil-out connects the second rodless cavity hydraulic fluid port.

2. passive type wave compensating device as claimed in claim 1, it is characterised in that the exhaust module includes work gas cylinder Electrically-controlled valve and work gas cylinder air bleeding valve；

The air inlet of the work gas cylinder electrically-controlled valve be the exhaust module air inlet, the outlet of the work gas cylinder electrically-controlled valve Mouth connects the work gas cylinder air bleeding valve, and the control signal input of the work gas cylinder electrically-controlled valve is the control of the exhaust module Signal input part processed.

3. passive type wave compensating device as claimed in claim 1, it is characterised in that described control unit is PLC.

4. passive type wave compensating device as claimed in claim 1, it is characterised in that the compensation execution unit also includes the One safety isolating valve and the second safety isolating valve；Described control unit also has isolated controlling end；

First safety isolating valve is arranged between the first rodless cavity hydraulic fluid port and first accumulator, and described first The isolated controlling end of the control signal input connection described control unit of safety isolating valve；Second safety isolating valve is set Between the second rodless cavity hydraulic fluid port and second accumulator, and the control signal input of second safety isolating valve Connect the isolated controlling end of described control unit.

5. passive type wave compensating device as claimed in claim 1, it is characterised in that the passive type wave compensating device is also Including ventilating control unit；The ventilating control unit includes working gas conducting valve, working gas pressure regulator valve and for even Connect total air inlet of the gas outlet of air compressor machine；

Total air inlet passes sequentially through the working gas conducting valve and connects the high pressure work with the working gas pressure regulator valve Make the gas inlet and outlet of gas cylinder.

6. passive type wave compensating device as claimed in claim 5, it is characterised in that the ventilating control unit also includes the One control air valve, second control air valve, control gas pressure regulating valve, low voltage control gas cylinder, the 3rd control air valve, the first electrically-controlled valve and First pneumatic actuator；Described control unit also has ventilating control end；First pneumatic actuator is used to control the work Make the opening and closing of gas communication valve；

Total air inlet passes sequentially through the working gas conducting valve and connects the high pressure work with the working gas pressure regulator valve Make the gas inlet and outlet of gas cylinder, be specially：

Total air inlet connects the air inlet of the working gas conducting valve by the first control air valve, and total air inlet is also The air inlet of the control gas pressure regulating valve is connected by the described second control air valve；The low pressure gas of the control gas pressure regulating valve Body outlet connects the gas inlet and outlet of the low voltage control gas cylinder；The gas inlet and outlet of the low voltage control gas cylinder is also by described 3rd control air valve connects the air inlet of first electrically-controlled valve；The gas outlet of first electrically-controlled valve is pneumatic by described first Actuator connects the working gas conducting valve, and the gas outlet of the working gas conducting valve passes through the working gas pressure regulator valve Connect the gas inlet and outlet of the high-pressure work gas cylinder；The control signal input connection control of first electrically-controlled valve is single The ventilating control end of member.

7. passive type wave compensating device as claimed in claim 6, it is characterised in that the ventilating control unit also includes the Four control air valves, the second electrically-controlled valve, the second pneumatic actuator and work air bleeding valve；Described control unit also includes second row gas control End processed；

The air inlet of the work air bleeding valve connects the air inlet of the working gas conducting valve；The gas of the low voltage control gas cylinder Body inlet and outlet also connect the air inlet of second electrically-controlled valve, the outlet of second electrically-controlled valve by the described 4th control air valve Mouth connects the switch port of the work air bleeding valve by second pneumatic actuator；The control signal of second electrically-controlled valve Input connects the second exhaust control terminal of described control unit.

8. passive type wave compensating device as claimed in claim 1, it is characterised in that the oil-feeding control unit also includes the One pressure adjustment relief valve, one-way conduction valve, first filter, the second filter and the first electro-hydraulic reversing valve；

The oil inlet of first pressure adjustment relief valve be the oil-feeding control unit the first oil inlet, first pressure-regulating overflow The oil-out of valve connects the oil inlet of the first filter by the one-way conduction valve, and first pressure adjustment relief valve returns Hydraulic fluid port connects the oil inlet of second filter；The oil-out of second filter is used to connect fuel tank；First mistake The oil-out of filter connects the oil inlet of first electro-hydraulic reversing valve；First oil-out of first electro-hydraulic reversing valve is institute The first oil-out of oil-feeding control unit is stated, the second oil-out of first electro-hydraulic reversing valve is the oil-feeding control unit Second oil-out, the first control signal input of first electro-hydraulic reversing valve are first controlled for the oil-feeding control unit End, the second control signal input of first electro-hydraulic reversing valve are the second controlled end of the oil-feeding control unit.

9. passive type wave compensating device as claimed in claim 8, it is characterised in that the oil-feeding control unit also includes using In the second oil inlet of the second oil-out of connection oil pump；The oil-feeding control unit also includes the second pressure adjustment relief valve；

The oil inlet of second pressure adjustment relief valve be the oil-feeding control unit the second oil inlet, second pressure-regulating overflow The oil-out of valve connects the oil inlet of the first filter, and the oil return opening of second pressure adjustment relief valve connects second mistake The oil inlet of filter.

10. passive type wave compensating device as claimed in claim 1, it is characterised in that the oil-feeding control unit also includes For the second oil inlet of the second oil-out for connecting oil pump；First hydraulic jack also has the first rod chamber hydraulic fluid port, institute Stating the second hydraulic jack also has the second rod chamber hydraulic fluid port；

Described control unit also has the 3rd oil-feeding control end, the 4th oil-feeding control end；

The oil-feeding control unit also has the 3rd oil-out, the 4th oil-out, the 3rd controlled end, the 4th controlled end；Described Three oil-outs connection the first rod chamber hydraulic fluid port, the 4th oil-out connection the second rod chamber hydraulic fluid port, the described 3rd Controlled end connects the 3rd oil-feeding control end of described control unit, and the 4th of the 4th controlled end connection described control unit supplies Oily control terminal；

The oil-feeding control unit include the 3rd pressure adjustment relief valve, the 4th pressure adjustment relief valve, the 3rd filter, the 4th filter, Second electro-hydraulic reversing valve and the 3rd electro-hydraulic reversing valve；The oil inlet of 3rd pressure adjustment relief valve is the oil-feeding control unit First oil inlet, the oil-out of the 3rd pressure adjustment relief valve connect the oil inlet of the 3rd filter, the 3rd pressure regulation The oil return opening of overflow valve connects the oil inlet of the 4th filter；The oil inlet of 4th pressure adjustment relief valve is the fuel feeding Second oil inlet of control unit, the oil-out of the 4th pressure adjustment relief valve connect the oil inlet of the 3rd filter, institute The oil return opening for stating the 4th pressure adjustment relief valve connects the oil inlet of the 4th filter；The oil-out of 4th filter is used for Connect fuel tank；The oil-out of 3rd filter connects the oil inlet of second electro-hydraulic reversing valve and the described 3rd and electro-hydraulic changed To the oil inlet of valve；First oil-out of second electro-hydraulic reversing valve be the oil-feeding control unit the first oil-out, institute State the second electro-hydraulic reversing valve the second oil-out be the oil-feeding control unit the 3rd oil-out, second electro-hydraulic reversing valve The first control signal input be the oil-feeding control unit the first controlled end, second electro-hydraulic reversing valve second control Signal input part processed is the 3rd controlled end of the oil-feeding control unit；First oil-out of the 3rd electro-hydraulic reversing valve is institute The second oil-out of oil-feeding control unit is stated, the second oil-out of the 3rd electro-hydraulic reversing valve is the oil-feeding control unit 4th oil-out, the first control signal input of the 3rd electro-hydraulic reversing valve are second controlled for the oil-feeding control unit End, the second control signal input of the 3rd electro-hydraulic reversing valve are the 4th controlled end of the oil-feeding control unit.