CN114294563A - Gas pressurization system and control method thereof - Google Patents

Abstract

The invention discloses a gas booster system and a control method thereof, belonging to the technical field of booster. The gas booster system includes a pneumatic booster device and a primary booster device. The pneumatic booster device includes a drive casing and a movable a pneumatic piston in the drive housing, the pneumatic piston divides the drive housing into two drive cavities, and the two drive cavities respectively have drive gas inlets; a primary booster device is connected to the pneumatic One drive cavity of the supercharging device, and the pneumatic piston moves to pressurize the gas to be supercharged entering the primary supercharging device. The invention can accommodate more gas to be pressurized in a limited space, and has simple operation and low cost.

Description

A gas booster system and its control method

technical field

The invention relates to the technical field of supercharging, and in particular, to a gas supercharging system and a control method thereof.

Background technique

As a green and clean energy, hydrogen is widely used in new energy vehicles and ships. At present, the use of hydrogen energy by new energy ships is mainly equipped with hydrogen fuel cells, which requires a large amount of hydrogen to be stored in a limited space. Therefore, there is a need for gas transportation in shipping or other fields using hydrogen fuel cells. Generally, the gas is filled into the tank, and the gas is transported through the tank. Due to the low density of the gas, the limited tank can only accommodate A small amount of gas results in less efficient gas transport. However, in the prior art, the gas transportation efficiency is usually improved by cooling the gas to a liquid state, and this method is difficult, requires a lot of resources, and the technology is immature. Therefore, how to store more gas in a limited space has become a difficult problem for gas transportation.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a gas pressurization system and a control method thereof, which can accommodate more gas to be pressurized in a limited space, with simple operation and low cost.

As conceived above, the technical scheme adopted in the present invention is:

A gas pressurization system comprising:

A pneumatic booster device includes a drive housing and a pneumatic piston movably arranged in the drive housing, the pneumatic piston divides the drive housing into two drive cavities, and the two drive cavities are respectively equipped with a drive air inlet;

The first-stage supercharging device is connected to a driving cavity of the pneumatic supercharging device, and the pneumatic piston moves to pressurize the gas to be supercharged entering the first-stage supercharging device.

Optionally, it also includes a secondary booster device, the secondary booster device is connected to another driving cavity of the pneumatic booster device and communicated with the first outlet of the primary booster device, and The pneumatic piston moves to secondary pressurize the gas to be pressurized entering the secondary pressurizing device.

Optionally, it also includes a gas supply solenoid valve, a gas injection solenoid valve and a controller, the gas supply solenoid valve is arranged on the passage communicating with the first-stage supercharging device, and the gas injection solenoid valve is arranged in the communication with the On the passage of the secondary supercharging device, the controller is controlled and connected to the air supply solenoid valve and the air injection solenoid valve, and is used for controlling the opening degrees of the air supply solenoid valve and the air injection solenoid valve.

Optionally, it also includes a pressure relief pipeline and a pressure relief solenoid valve arranged on the pressure relief pipeline, the pressure relief pipeline is communicated with the secondary booster device, and the pressure relief pipeline is used to The gas in the secondary supercharging device is discharged, and the controller is controlled and connected to the pressure relief solenoid valve and used to control the opening degree of the pressure relief solenoid valve.

Optionally, it also includes a scavenging pipeline and a scavenging solenoid valve arranged on the scavenging pipeline, the scavenging pipeline is connected to the first-stage supercharging device, and the scavenging pipeline is used to send the first-stage booster to the first stage. The gas to be replaced is input into the supercharging device, and the controller is controlled and connected to the scavenging solenoid valve and used to control the opening of the scavenging solenoid valve.

Optionally, the two-stage booster device includes a second booster cavity and a second booster piston, the second booster piston is movably arranged in the second booster cavity, and the second booster The part of the cavity located on one side of the second booster piston is communicated with the other drive cavity, the second booster cavity is provided with a second inlet and a second outlet, the second inlet and the The second outlet is located on the other side of the second pressurizing piston, the second inlet is communicated with the first outlet, and the second pressurizing piston is connected to the pneumatic piston.

Optionally, the first-stage booster device includes a first booster cavity and a first booster piston, the first booster piston is movably arranged in the first booster cavity, and the first booster The part of the pressure chamber on one side of the first pressurizing piston is communicated with one of the driving chambers, and the first pressurizing chamber is provided with the first outlet and the first inlet, and the first outlet And the first inlet is located on the other side of the first pressurizing piston, and the first pressurizing piston is connected to the pneumatic piston.

Optionally, a check valve is installed on the first inlet and the first outlet respectively.

Optionally, the cross-sectional dimension of the first pressurizing piston is smaller than the cross-sectional dimension of the pneumatic piston.

Optionally, it also includes a mechanical safety valve, the mechanical safety valve is installed on the passage between the pressure relief pipeline and the secondary booster device, and the mechanical safety valve is used in the gas booster system. Automatically opens and relieves pressure when the pressure exceeds the preset pressure.

Optionally, it also includes a display device, through which an instruction can be input to the controller, the controller is used to control the opening or closing of a valve body according to the instruction, and the valve body includes the scavenging solenoid One or more of the valve, the pressure relief solenoid valve, the gas supply solenoid valve and the gas injection solenoid valve.

Optionally, the pneumatic booster device further includes two thimbles, one of the thimbles is arranged on the side wall of a drive cavity for installing the first-stage booster device, and the other of the thimbles is arranged on the other drive. The cavity is used to install the side wall of the secondary booster device, and when the pneumatic piston touches the thimble, the moving direction can be automatically changed.

A control method for a gas booster system, applied to the above-mentioned gas booster system, includes the following steps:

Input gas into a driving cavity through the driving gas inlet, so that the gas to be pressurized enters the first-stage supercharging device until the pneumatic piston meets the preset condition;

Gas is input into another driving cavity through the driving gas inlet to drive the pneumatic piston to move and compress the gas to be pressurized entering the primary pressurizing device.

Optionally, the gas supercharging system further includes a secondary supercharging device, and the secondary supercharging device is connected to another driving cavity of the pneumatic supercharging device and communicated with the primary supercharging device The first outlet of the gas pressurization system further includes the following steps:

The pressurized gas to be pressurized flows into the secondary supercharging device through the first outlet of the primary supercharging device;

Gas is again input into a driving cavity through the driving gas inlet to drive the pneumatic piston to move and compress the gas to be boosted into the secondary boosting device.

Optionally, a replacement step is also included, and the replacement step includes:

The scavenging solenoid valve that controls the gas boosting system is opened, so that the gas to be replaced enters the first boosting cavity through the scavenging pipeline;

Control the pressure relief solenoid valve of the gas booster system to open, so that the gas to be replaced is input into the second booster cavity;

After a preset time period, close the scavenging solenoid valve;

The gas to be pressurized is input into the first pressurization chamber through the first inlet, so that the gas to be replaced is discharged from the pressure relief pipeline to replace the first pressurized chamber and the second pressurized chamber the gas to be replaced;

When there is no gas to be replaced in the first pressurizing chamber, the second pressurizing chamber and the pressure relief pipeline, the pressure relief solenoid valve is closed.

Optionally, the preset condition is one or more of the pneumatic piston hitting a thimble disposed in the driving cavity, the pneumatic piston moving a preset distance, or the pneumatic piston moving for a preset duration.

The present invention has at least the following beneficial effects:

The gas pressurization system and the control method thereof provided by the present invention realize the pressurization of the to-be-pressurized gas by combining the pneumatic pressurizing device with the primary pressurizing device. Compress the gas, and then input gas into a driving cavity through the driving gas inlet, so that the gas drives the pneumatic piston to move, so as to compress the to-be-pressurized gas in the first-stage supercharging device, and increase the to-be-pressurized gas in the first-stage supercharging device. It increases the amount of gas to be pressurized that can be stored in the limited space, and the operation methods and control methods of the pneumatic supercharging device and the first-stage supercharging device are relatively simple, do not need to consume a lot of energy, and have low technical difficulty and low cost. the cost of.

Description of drawings

1 is a schematic structural diagram of a gas pressurization system provided in Embodiment 1 of the present invention;

2 is a schematic diagram of the principle of the gas booster system provided in Embodiment 1 of the present invention;

3 is a schematic diagram of the working principle of the air booster pump provided in Embodiment 1 of the present invention;

4 is a flowchart of a control method of a gas booster system provided in Embodiment 2 of the present invention;

FIG. 5 is a flowchart of another control method of a gas pressurization system provided by Embodiment 2 of the present invention;

FIG. 6 is a flowchart of a replacement step provided by Embodiment 2 of the present invention.

In the picture:

1. Pneumatic booster device; 11. Drive housing; 111. Drive cavity; 12. Pneumatic piston;

2. Primary booster device; 21. First booster cavity; 211,; 212,; 22, first booster piston; 201, first inlet; 202, first outlet;

3. Secondary boosting device; 31. Second boosting cavity; 32. Second boosting piston; 301, Second inlet; 302, Second outlet;

4. One-way valve; 5. The first connecting rod; 6. The second connecting rod; 71. The scavenging line; 72, the scavenging solenoid valve; 81, the pressure relief line; 82, the pressure relief solenoid valve;

9, the first pipeline; 10, the air supply solenoid valve; 20, the first filter; 30, the first pressure transmitter; 40, the first pressure gauge; 50, the second pipeline; 60, the first check Valve; 70, second filter; 80, gas injection solenoid valve; 90, second pressure transmitter; 100, second pressure gauge; 200, second check valve; 300, third pipeline; 400, mechanical Safety valve; 500, fourth pipeline; 600, third check valve; 700, gas delivery pipe; 800, filter pressure regulating valve; 900, electronic speed regulating valve;

a, the first piston; b, the second piston.

Detailed ways

In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further described below with reference to the accompanying drawings and through specific embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, the accompanying drawings only show some but not all of the parts related to the present invention.

In the description of the present invention, unless otherwise expressly specified and limited, the terms "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection, a detachable connection, or an integrated ; It can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific situations.

In the present invention, unless otherwise expressly specified and limited, a first feature "on" or "under" a second feature may include the first and second features in direct contact, or may include the first and second features Not directly but through additional features between them. Also, the first feature being "above", "over" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature is "below", "below" and "below" the second feature includes the first feature being directly below and diagonally below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this embodiment, the terms "upper", "lower", "right", etc. are based on the orientation or positional relationship shown in the accompanying drawings, which are only for convenience of description and simplified operation, rather than indicating Or imply that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as limiting the invention. In addition, the terms "first" and "second" are only used for distinction in description, and have no special meaning.

This embodiment provides a gas pressurization system for pressurizing the gas to be pressurized, so that more gas to be pressurized can be accommodated in a limited space, and the operation is simple and the cost is low. The gas to be pressurized in this embodiment can be hydrogen, nitrogen, etc., and the gas pressurization system can be used with a hydrogen tank or a hydrogen cylinder.

As shown in FIG. 1 and FIG. 2 , the gas supercharging system includes a pneumatic supercharging device 1 and a primary supercharging device 2 .

The pneumatic booster device 1 includes a drive housing 11 and a pneumatic piston 12 movably disposed in the drive housing 11 . The pneumatic piston 12 divides the driving housing 11 into two driving cavities 111 , and the two driving cavities 111 are independent of each other, that is, the gases in the two driving cavities 111 cannot communicate with each other. The two driving cavities 111 respectively have a driving gas inlet, and each driving cavity 111 can be filled with gas through the driving gas inlet. For example, the gas may be compressed air. In some embodiments, the two driving gas inlets are respectively communicated with the driving gas source, and gas is charged into one of the driving chambers 111 through the control of the valve on the driving gas source. It should be noted that each driving cavity 111 may also have a driving gas outlet, so that the gas in the driving cavity 111 can flow out of the driving cavity 111 through the driving gas outlet. At this time, a solenoid valve is installed at the driving gas outlet to Open the driving gas outlet when needed; alternatively, the gas in the driving cavity 111 may also be discharged through the driving gas inlet, which is not limited in this embodiment.

Optionally, the moving direction of the pneumatic piston 12 is parallel to the extending direction of the drive housing 11 . In FIG. 1 , the moving direction of the pneumatic piston 12 and the extending direction of the drive housing 11 are both left and right directions. In this embodiment, the drive housing 11 may be in the shape of a cuboid, a cylinder, a cube or other shapes.

As shown in FIG. 1 , the primary supercharging device 2 is connected to a driving cavity 111 of the pneumatic supercharging device 1 . In some embodiments, the primary supercharging device 2 is connected to the gas tank to be pressurized or the gas to be pressurized and the to-be-pressurized gas in the to-be-pressurized gas tank or the to-be-pressurized gas cylinder can enter the primary pressurizing device 2 . When the pneumatic piston 12 moves in the drive housing 11 , it can pressurize the gas to be pressurized entering the primary supercharging device 2 , so as to increase the pressure of the gas to be pressurized in the primary supercharging device 2 . The pressurized gas to be pressurized can be input into the gas storage bottle.

The gas pressurization system provided in this embodiment realizes the pressurization of the to-be-pressurized gas through the combination of the pneumatic pressurizing device 1 and the primary pressurizing device 2 . Then, the gas is input into a driving cavity 111 through the driving gas inlet, so that the gas drives the pneumatic piston 12 to move, so as to compress the gas to be pressurized in the first-stage supercharging device 2, and the first-stage supercharging device 2 is enlarged. The pressure of the air to be pressurized inside increases the amount of air to be pressurized that can be stored in the limited space, and the operation and control methods of the pneumatic supercharging device 1 and the primary supercharging device 2 are relatively simple, without consuming a lot of energy, Low technical difficulty and low cost.

Please continue to refer to FIG. 1 , the gas boosting system further includes a secondary boosting device 3 . Wherein, the secondary supercharging device 3 is connected to another driving cavity 111 of the pneumatic supercharging device 1 , and is communicated with the first outlet 202 of the primary supercharging device 2 . The pneumatic piston 12 moves to secondary pressurize the gas to be pressurized entering the secondary pressurizing device 3; in some embodiments, the secondary pressurizing device 3 can be communicated with the gas storage cylinder, so that after the secondary pressurization The gas to be pressurized can be output to the gas cylinder. It should be noted that when the gas to be pressurized is hydrogen, the gas storage cylinder can be a hydrogen cylinder.

When using the gas booster system provided in this embodiment, the gas to be boosted is firstly input into the primary booster device 2 , and at the same time, the gas is input into a driving cavity 111 through the driving gas inlet until the pneumatic piston 12 meets the preset requirements. Conditions; then, gas is input into the other driving cavity 111 through the driving gas inlet, at this time, the gas in one driving cavity 111 will not be discharged, but compressed, and the pneumatic piston 12 will be driven to move and be compressed into the first stage The gas to be pressurized in the supercharging device 2; after the gas to be supercharged in the primary supercharging device 2 reaches a certain pressure, it flows into the secondary supercharging device 3 through the first outlet 202 of the primary supercharging device 2; then Gas is input into one driving cavity 111 again through the driving gas inlet. At this time, the gas in the other driving cavity 111 will not be discharged but compressed, and the pneumatic piston 12 will be driven to move and be compressed into the secondary booster The to-be-pressurized gas in the device 3 and the compressed to-be-pressurized gas are input to the gas storage cylinder, so as to realize the pressurization of the to-be-pressurized gas. It can be understood that when the pressure of the gas in the driving cavity 111 is too large, the driving cavity 111 can be exhausted, as long as the boosting of the primary supercharging device 2 and the secondary supercharging device 3 is not affected. Can.

In the gas boosting system provided in this embodiment, the pneumatic boosting device 1 is combined with the primary boosting device 2 and the secondary boosting device 3 to realize the boosting of the to-be-pressurized gas, and the pressure of the to-be-pressurized gas increases, so that the limited The amount of air to be pressurized that can be stored in the space increases, and the operation methods and control methods of the pneumatic supercharging device 1, the primary supercharging device 2 and the secondary supercharging device 3 are relatively simple, without consuming a lot of energy, and the technical difficulty is low and has a lower cost.

In addition, the core equipment of the gas booster system provided in this embodiment is a pneumatic booster device 1, which does not require lubricating oil and has the advantages of small size, light weight, compact structure, and reliable operation.

Optionally, referring to FIG. 1 , the first-stage booster device 2 includes a first booster cavity 21 and a first booster piston 22 . The first pressurizing piston 22 is movably arranged in the first pressurizing cavity 21 . Optionally, as shown in FIG. 1 , the first pressurizing piston 22 is connected to the pneumatic piston 12 through the first connecting rod 5 , so that the first connecting rod 5 can guide the movement of the first pressurizing piston 22 . In this embodiment, the outer peripheral surface of the first boosting piston 22 is in sealing contact with the inner wall of the first boosting cavity 21, and the part of the first boosting cavity 21 on the side of the first boosting piston 22 is connected to a drive The cavity 111 enables the gas in one driving cavity 111 to provide a driving force to the first booster piston 22, so that the first booster piston 22 moves in the first booster cavity 21. The pressing piston 22 can slide in the first pressurizing cavity 21 .

The first pressurizing cavity 21 has a first outlet 202 and a first inlet 201, and the first outlet 202 and the first inlet 201 are located on the other side of the first pressurizing piston 22, that is, the first pressurizing piston 22 will The first boosting cavity 21 is divided into a first sub-cavity 211 and a second sub-cavity 212, the volumes of the first sub-cavity 211 and the second sub-cavity 212 are variable, and the first sub-cavity 211 is connected to a driving cavity 111, The first outlet 202 and the first inlet 201 are respectively provided in the second sub-cavity 212 . The gas to be supercharged can be input into the first supercharging cavity 21 through the first inlet 201 , and the gas to be supercharged after being primary compressed can be output to the first supercharging cavity 21 through the first outlet 202 .

Optionally, as shown in FIG. 1 , the first inlet 201 and the first outlet 202 are respectively equipped with a one-way valve 4 , so that the gas to be pressurized can only enter the first pressurized cavity 21 from the first inlet 201 , and It cannot flow out of the first supercharging cavity 21 from the first inlet 201 , and at the same time, the gas to be supercharged can only flow out of the first supercharging cavity 21 from the first outlet 202 , but cannot enter the first supercharging cavity through the first outlet 202 body 21 to ensure the normal use of the primary supercharging device 2 . And, the check valve 4 located at the first outlet 202 is configured to open when the pressure of the gas to be boosted in the first boosting cavity 21 is greater than the first preset pressure.

Further, please refer to FIG. 1 and FIG. 2 , the first inlet 201 is connected with a first pipeline 9, and the first pipeline 9 is connected to the storage device of the gas to be pressurized (such as a gas tank to be pressurized), and the first pipeline The air supply solenoid valve 10, the first filter 20, the first pressure transmitter 30 and the first pressure gauge 40 are installed on the road 9. on the passage (ie, the first pipeline 9). In this embodiment, the air supply solenoid valve 10 , the first filter 20 , the first pressure transmitter 30 and the first pressure gauge 40 are arranged in sequence.

Optionally, the gas pressurization system further includes a controller. In some embodiments, the controller may be a programmable logic controller (Programmable Logic Controller; PLC). Among them, the air supply solenoid valve 10 , the first pressure transmitter 30 and the first pressure gauge 40 are respectively connected to the controller, and the controller can control the opening of the air supply solenoid valve 10 to adjust the pressure to the primary pressure booster 2 The amount of gas to be charged to be pressurized. The controller can also acquire data on the first pressure transmitter 30 . Wherein, the first pressure transmitter 30 is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. The first pressure transmitter 30 can convert physical pressure parameters such as gas and liquid sensed by the load cell sensor into standard electrical signals (such as 4 to 20 mADC, etc.), so as to supply two indicators such as alarms, recorders, and regulators. Secondary instrument for measurement, indication and process adjustment. The controller can also obtain the pressure of the first pressure gauge 40 , and the first pressure gauge 40 is used to detect the pressure of the gas to be pressurized in the first pipeline 9 . The first filter 20 is used to filter the gas to be pressurized that will enter the first inlet 201 .

Optionally, referring to FIG. 1 , the two-stage booster device 3 includes a second booster cavity 31 and a second booster piston 32 . The second pressurizing piston 32 is movably arranged in the second pressurizing cavity 31 , and the second pressurizing piston 32 is connected to the pneumatic piston 12 through the second connecting rod 6 , so that the second connecting rod 5 can be the second pressurizing piston 32 movement is guided. The second pressurizing piston 32 divides the second pressurizing cavity 31 into a third sub-chamber 311 and a fourth sub-chamber 312 , and the volumes of the third sub-chamber 311 and the fourth sub-chamber 312 are variable. The third sub-chamber 311 is communicated with the other driving cavity 111, so that the compressed gas in the other driving cavity 111 can push the second boosting piston 32 to slide in the second boosting cavity 31, which needs to be increased again. The compressed gas to be pressurized is located in the fourth sub-chamber 312 . The second supercharging cavity 31 has a second inlet 301 and a second outlet 302 disposed in the fourth sub-chamber 312 , and the second inlet 301 is communicated with the first outlet 202 . The gas to be pressurized in the first pressurizing cavity 21 enters the fourth sub-chamber 312 from the second inlet 301 and is compressed again in the fourth sub-chamber 312 . In this embodiment, the movement of the second pressurizing piston 32 To achieve recompression of the charge gas to be treated.

Optionally, the second inlet 301 and the second outlet 302 are respectively provided with a one-way valve 4, so that the gas to be pressurized can only enter the fourth sub-chamber 312 through the second inlet 301, but cannot flow out of the fourth sub-chamber 312 through the second inlet 301. At the same time, the gas to be pressurized can only flow out of the fourth sub-chamber 312 through the second outlet 302, but cannot flow into the fourth sub-chamber 312 through the second outlet 302, so as to ensure that the fourth sub-chamber 312 can be pressurized smoothly Air is pressurized. And, the one-way valve 4 located at the second outlet 302 is configured to open when the pressure of the gas to be pressurized in the fourth sub-chamber 312 is greater than the second preset pressure.

In this embodiment, as shown in FIG. 2 , the first outlet 202 is communicated with the second inlet 301 through a pipeline, and the second outlet 302 of the secondary booster device 3 is communicated with the gas cylinder through a second pipeline 50 , the second pipeline 50 is installed with the first check valve 60, the second filter 70, the gas injection solenoid valve 80, the second pressure transmitter 90 and the second pressure gauge 100, that is, the gas injection solenoid valve 80 is provided on the passage communicating with the secondary supercharging device 3 (ie, the second pipeline 50 ). The first check valve 60 is used to prevent the backflow of the gas to be pressurized, the gas injection solenoid valve 80 is used to adjust the flow of the gas to be pressurized, and the second pressure transmitter 90 has the same function as the first pressure transmitter 30. The second pressure gauge 100 is used to detect the pressure of the gas to be pressurized in the second pipeline 50 . In this embodiment, the first check valve 60 , the second filter 70 , the gas injection solenoid valve 80 , the second pressure transmitter 90 and the second pressure gauge 100 are arranged in sequence.

The gas injection solenoid valve 80 , the second pressure transmitter 90 and the second pressure gauge 100 are respectively connected to the controller. In this embodiment, the controller can also control the opening of the gas injection solenoid valve 80 ; at the same time, the controller is also used to acquire data detected by the second pressure transmitter 90 and the second pressure gauge 100 . The function of the second pressure transmitter 90 is the same as that of the first pressure transmitter 30 , and details are not described here in this embodiment.

Further, please continue to refer to FIG. 2 , the gas pressurization system further includes a pressure relief pipeline 81 and a pressure relief solenoid valve 82 arranged on the pressure relief pipeline 81 , and the pressure relief pipeline 81 is communicated with the secondary booster device 3 , And the pressure relief pipeline is used to discharge the gas in the secondary supercharging device 3 , and the controller is connected to the pressure relief solenoid valve 82 and used to control the opening of the pressure relief solenoid valve 82 . After the gas pressurization system is pressurized, the pressure relief operation can be performed. At this time, the pressure relief can be performed through the pressure relief pipeline 81, which improves the safety and reliability of the gas pressurization system.

Optionally, as shown in FIG. 2 , the gas supercharging system further includes a scavenging pipeline 71 , which is connected to the primary supercharging device 2 and is used to input the gas to be replaced into the primary supercharging device 2 . Specifically, the scavenging line 71 is communicated with the first pressurizing chamber 21 . In some embodiments, as shown in FIG. 2 , the scavenging line 71 is communicated with the first line 9 , and the scavenging line 71 is connected to the first pipe 9 . The connection position of the path 9 is between the air supply solenoid valve 10 and the first filter 20 . The scavenging pipeline 71 is provided with a scavenging solenoid valve 72 , the scavenging solenoid valve 72 is connected to the controller, and the controller is also used to control the opening of the scavenging solenoid valve 72 . In this embodiment, a second check valve 200 is also installed on the scavenging pipeline 71 to prevent backflow of the gas to be replaced. Optionally, the scavenging pipeline 71 is connected to the source of the gas to be replaced, and the gas to be replaced may be a gas such as nitrogen. Before the pressurized gas is pressurized, the gas in the gas pressurization system can be replaced by the gas to be replaced, so that the gas filled in the gas pressurization system is the gas to be replaced, and then the gas is filled into the gas pressurization system. Enter the pressurized gas to replace the gas to be replaced by the pressurized gas. The density of the gas to be replaced and the gas to be pressurized are different, which can ensure that the two will not be mixed, so that the gas to be replaced can be replaced by the gas to be replaced by the pressurized gas. It is completely driven out in the supercharging system, preventing other gases from being mixed in the gas to be pressurized, ensuring the purity of the gas to be pressurized, and only the gas to be pressurized exists in the gas supercharging system, which can also improve the efficiency of the pressurization process. safety.

In some embodiments, the pressure relief pipeline 81 is communicated with the second pipeline 50 , and the connection position of the pressure relief pipeline 81 and the second pipeline 50 is located between the first check valve 60 and the second filter 70 . In this embodiment, there are two connection points between the pressure relief pipeline 81 and the second pipeline 50 , one of which is located between the gas injection solenoid valve 80 and the second pressure transmitter 90 , and the other is located between the gas injection solenoid valve 80 and the second pressure transmitter 90 . between the first check valve 60 and the second filter 70 . The third pipeline 300 communicates between the pressure relief pipeline 81 and another connection point, and the connection position between the third pipeline 300 and the pressure relief pipeline 81 is located downstream of the pressure relief solenoid valve 82 , on the third pipeline 300 The mechanical safety valve 400 is installed, that is, the mechanical safety valve 400 is installed on the passage between the pressure relief pipeline 81 and the secondary pressure boosting device 3 . The mechanical safety valve 400 is used to automatically open and release the pressure when the pressure of the gas booster system exceeds the preset pressure, so as to ensure the safety of the pressure release process. In this embodiment, the driving gas outlets of the two driving cavities 111 are respectively connected to the third pipeline 300 . Specifically, the two driving cavities 111 are respectively connected to the third pipeline 300 through the fourth pipeline 500 , and the The connection point between the fourth pipeline 500 and the third pipeline 300 is located downstream of the mechanical safety valve 400 , and a third check valve 600 is installed on the fourth pipeline 500 .

In this embodiment, please continue to refer to FIG. 2 , the driving gas inlets of the two driving chambers 111 are respectively connected to the gas delivery pipe 700 , the gas delivery pipe 700 is connected to the gas source, and a filter pressure regulating valve is installed on the gas delivery pipe 700 800 and electronic speed regulating valve 900, the filter pressure regulating valve 800 is used to filter the air in the gas delivery pipe 700, and is used to regulate the gas in the gas delivery pipe 700, and the electronic speed regulating valve 900 is used to control the gas delivery pipe 700 The flow rate of the gas inside. The filter pressure regulating valve 800 and the electronic speed regulating valve 900 are controlled by the controller respectively.

Optionally, the gas pressurization system further includes a display device, through which an instruction can be input to the controller, and the controller is used to control the opening or closing of the valve body according to the instruction. The valve body includes one or more of the above-mentioned scavenging solenoid valve 72 , pressure relief solenoid valve 82 , air supply solenoid valve 10 , gas injection solenoid valve 80 , filter pressure regulating valve 800 and electronic speed regulating valve 900 . Preferably, the display device in this embodiment may be a touch display screen, so that the user can input instructions through the touch display screen. In this embodiment, the gas pressurization system can adopt a portable box structure, the electrical and mechanical layers are shielded, and the electrical equipment adopts explosion-proof equipment, and the first inlet 201, the driving gas inlet and the control power supply are left on one side of the integrated filling box. The line port (for power supply cable passing), the other side is the second outlet 302 and the pressure relief port (that is, the interface for connecting the pressure relief pipeline 81). The front of the box is equipped with a control panel for easy operation. The above-mentioned display device is installed on the upper part, and the display device can display visual dynamic, data display and alarm display. At the same time, there are manual emergency adjustment switches and pressure gauges, etc., which are convenient for observation and operation.

In this embodiment, in order to ensure the pressurization effect of the to-be-pressurized gas, the cross-sectional dimension of the first pressurizing piston 22 is smaller than that of the pneumatic piston 12 and larger than that of the second pressurizing piston 32 . Figure 3 shows the working principle of the air booster pump, wherein the pressure of the driving air is Pa, the action area of the driving air, that is, the area of the first piston a is F _A , the pressure of the output gas is Po, and the area of the second piston b is is F _B , then according to the force balance, the pressure of the output gas Po=Pa*F _A /F _B , when F _A is different from F _B , during the reciprocating motion of the first piston a, the piston with a small area can be Generate high pressure fluid. In this embodiment, the gas to be boosted after being processed by the secondary booster device 3 can have a higher pressure. For example, the pneumatic booster device 1 uses compressed air of 0.6MPa-0.8MPa as the driving gas to drive the booster pump to work, and can pressurize the standard nitrogen/hydrogen bottled gas of 2MPa-15MPa to the required pressure of 35MPa. It can be seen that the control mode of the gas booster system is fully automatic. It only needs to connect the filling gun connected to the second outlet 302 to the hydrogen filling port to realize automatic filling, which makes hydrogen filling more convenient. The form of the pressure regulating valve 800 determines the pressure of the pressurized gas source, and the filling speed control and the start-up and shutdown are realized by adjusting the electronic speed control valve 900 . The output point of the booster pump is equipped with electrical pressure protection and mechanical safety valve, and the overpressure is automatically opened and released. It can be understood that the pressure value of the output gas to be pressurized is not limited to 35MPa, and is only required in this application scenario.

In this embodiment, the pneumatic booster 1 further includes two thimbles. Wherein, a thimble is installed on the side wall of a driving cavity 111 where the primary pressure boosting device 2 is installed. When the pneumatic piston 12 touches a thimble, or the one thimble senses that the pneumatic piston 12 moves to the first preset position, The pneumatic piston 12 can automatically stop or automatically change the moving direction, that is, the thimble can be used as a triggering device, and the pneumatic piston 12 can stop moving or move in the reverse direction according to the triggering of the thimble. Another thimble is installed on the side wall of the other driving cavity 111 where the secondary pressure boosting device 3 is installed. When the pneumatic piston 12 touches the other thimble, or the other thimble senses that the pneumatic piston 12 moves to the second preset position , the pneumatic piston 12 can automatically stop or automatically change direction. By setting the thimble, the requirements for explosion-proof and static electricity of the gas to be pressurized can also be met, and the utility model has high safety and reliability.

In this embodiment, all the explosion-proof and anti-static solenoid valves in the gas booster system can be replaced with pneumatic control valves, so as to eliminate the harm caused by static electricity from the root.

In this embodiment, the gas pressurization system has three gas source input ports (respectively the first inlet 201 , the driving gas inlet and the gas to be replaced inlet), a high pressure output port (ie the second outlet 302 ) and a pressure relief port (ie, the interface for connecting the pressure relief pipeline 81 ), the second outlet 302 is used for outputting the pressurized gas to be pressurized, and the pressure relief port is used for removing excess gas or reducing pressure. Each solenoid valve is programmed and controlled by the controller to control the intake air; the electronic speed control valve 900 is used to adjust the working frequency of the gas supercharging system.

The gas pressurization system provided in this embodiment is an automatic valve control system based on a controller controlling multiple solenoid valves and control valves, which includes two important processes, one is the gas replacement process, and the other is the gas pressurization process; the gas replacement process Mainly, after nitrogen replaces the air, the nitrogen is replaced with hydrogen; the gas pressurization process mainly controls the electronic speed regulating valve 900 and the filter pressure regulating valve 800 to increase the gas pressure. The filter pressure regulating valve 800 may be a pneumatic booster pump.

The control method of the gas pressurization system provided by this embodiment also has the following beneficial effects:

1. Using the controller to control solenoid valves (such as scavenging solenoid valve 72, pressure relief solenoid valve 82, air supply solenoid valve 10 and gas injection solenoid valve 80, filter pressure regulating valve 800 and electronic speed regulating valve 900) can reduce manual use , reduce the degree of work danger, reduce errors and mistakes, and can effectively and efficiently perform the required tasks.

2. The controller has the function of electronically controlled overpressure protection, and the gas booster system has a pressure relief pipeline 81 and a mechanical safety valve 400. When the overpressure occurs, the controller will automatically control the pressure relief solenoid valve 82 to open the pressure relief to ensure that the gas increases. In case of emergency, the controller can stop the filter pressure regulating valve 800 through the electronic speed regulating valve 900, and when the electronic control is completely faulty, the mechanical safety valve 400 is opened for protection.

3. All instruments that need to be observed and operated (such as the first pressure gauge 40, the second pressure gauge 100), valves (such as the scavenging solenoid valve 72, the pressure relief solenoid valve 82, the gas supply solenoid valve 10 and the gas injection solenoid valve 80, The filter pressure regulating valve 800 and the electronic speed regulating valve 900) are integrated on the display device, which is convenient for observation and convenient for the staff to use the controller to control.

4. The gas booster system adopts oil-free lubrication technology, that is, the gas booster system does not require lubrication equipment, the gas passing through the gas booster system will not be degraded in quality, and the gas will not be polluted, which can ensure the interior of the gas booster system. The cleanliness is high, and all the lubrication costs can be saved, with a lower cost.

5. The connection between the pipelines adopts the connection form of thread combined with double ferrules/full ferrule type structure, without welding, and the connection and disassembly are more convenient.

6. The end of the second pipeline 50 used for outputting the pressurized gas to be pressurized by the gas pressurization system is connected with a male connector of the quick-plug connector, which can be matched with the female connector of the quick-connect connector connected to the gas filling port of the gas storage bottle. , it is convenient and quick to connect the gas storage bottle and add gas to the gas storage bottle, and it can be disassembled and used repeatedly.

Embodiment 2

This embodiment provides a control method for a gas booster system, which is applied to the gas booster system in Embodiment 1. As shown in FIG. 4 , taking the gas to be boosted as hydrogen as an example, the control method for the gas booster system It includes the following steps:

S1. Input gas into a driving cavity 111 through a driving gas inlet, so that the gas to be pressurized enters the primary supercharging device 2 until the pneumatic piston 12 meets the preset conditions.

In this embodiment, as shown in FIG. 1 , one driving cavity 111 is the driving cavity 111 located on the left side, and the other driving cavity 111 is the driving cavity 111 located on the right side. The gas pressure in a driving cavity 111 is pressurized, and while pushing the pneumatic piston 12 to move to the right, the gas to be pressurized enters the primary pressurizing device 2 through the principles of vacuum suction or pressure difference. In this embodiment, one driving cavity 111 is filled with air, and the pneumatic piston 12 moves away from the first-stage supercharging device 2 . At the same time, the first booster piston 22 is pushed to move by the first connecting rod 5 or the pressure difference, thereby increasing the volume of the first booster cavity 21 on the other side of the first booster piston 22, so that the gas to be boosted enters the first booster piston 22. Pressurized cavity 21 .

Optionally, the preset condition is one or more of the pneumatic piston 12 hitting a thimble disposed in another driving cavity 111 , the pneumatic piston 12 moving a preset distance, or the pneumatic piston 12 moving for a preset duration. When the pneumatic piston 12 satisfies the preset condition, it means that the pneumatic piston 12 has moved to the right position, and at this time, it should stop continuously inflating into a driving cavity 111 .

S2. Input gas into the other driving cavity 111 through the driving gas inlet, so as to drive the pneumatic piston 12 to move and compress the gas to be pressurized entering the primary supercharging device 2 .

When there is a sufficient amount of hydrogen in the primary supercharging device 2, the driving gas is reversed, so that the other driving cavity 111 is filled with air through the driving gas inlet, so that the pneumatic piston 12 moves close to the primary supercharging device 2, And squeeze the hydrogen in the primary pressurizing device 2 to perform primary pressurization. For example, in this embodiment, when inflating the other drive cavity 111 located on the right side, the pneumatic piston 12 moves close to the primary booster 2, and under the action of the first connecting rod 5 or the pressure difference, pushes the first A pressurizing piston 22 moves to reduce the volume of the first pressurizing cavity 21 on the other side of the first pressurizing piston 22 to achieve pressurization of hydrogen.

In this embodiment, the one-way valve 4 located at the first outlet 202 is configured to open when the pressure of the gas to be pressurized in the first pressurizing cavity 21 is greater than the first preset pressure, so as to The gas in the first pressurizing cavity 21 flows out from the first outlet 202 .

In the control method of the gas pressurization system provided in this embodiment, the pressurization of the to-be-pressurized gas is realized by combining the pneumatic pressurizing device 1 with the primary pressurizing device 2 . Input the gas to be pressurized, and then input the gas into a driving cavity 111 through the driving gas inlet, so that the gas drives the pneumatic piston 12 to move, so as to compress the gas to be pressurized in the first-stage supercharging device 2, and the first-stage boosting gas is increased. The pressure of the gas to be pressurized in the pressurizing device 2 increases, so that the amount of the gas to be pressurized that can be stored in the limited space increases, and the operation methods and control methods of the pneumatic supercharging device 1 and the first-stage supercharging device 2 are relatively simple, and do not need to spend a lot of money. energy, low technical difficulty and low cost.

Optionally, when the gas supercharging system includes the secondary supercharging device 3, as shown in FIG. 5, the control method for the gas supercharging system further includes the following steps:

S3 . The supercharged gas to be supercharged flows into the secondary supercharging device 3 through the first outlet of the primary supercharging device 2 .

S4. Input gas into one driving cavity 111 again through the driving gas inlet to drive the pneumatic piston 12 to move and compress the gas to be pressurized entering the secondary supercharging device 3 .

Since the first outlet 202 communicates with the second inlet 301 , the gas to be supercharged after being primary pressurized can enter the second supercharging cavity 31 of the secondary supercharging device 3 . In step S4, by outputting air into a driving cavity 111, the pneumatic piston 12 is moved close to the secondary boosting device 3, and under the action of the second connecting rod 6 or the pressure difference, the second boosting piston 32 moves to the right , so as to reduce the volume of the second pressurizing cavity 31 on the other side of the second pressurizing piston 32 to realize the repressurization of hydrogen. The one-way valve 4 located at the second outlet 302 is configured to open when the pressure of the gas to be pressurized in the second pressurizing chamber 31 is greater than the second preset pressure, so that the re-pressurized Hydrogen can flow out through the second outlet 302 .

While pressurizing the hydrogen again, the first pressurizing piston 22 moves close to the secondary pressurizing device 3 , and the hydrogen enters the first pressurizing chamber 21 through the first inlet 201 , and at the same time completes the second pressurizing chamber 31 . The supercharging and the action of inflating the first supercharging cavity 21, so the cycle can be reciprocated, which improves the supercharging efficiency.

In the control method of the gas supercharging system provided in this embodiment, the pressure of the gas to be supercharged is realized by combining the pneumatic supercharging device 1 with the primary supercharging device 2 and the secondary supercharging device 3, and the pressure of the gas to be supercharged increases. , so that the amount of air to be pressurized that can be stored in the limited space increases, and the operation methods and control methods of the pneumatic supercharging device 1, the primary supercharging device 2 and the secondary supercharging device 3 are relatively simple, without consuming a lot of energy, Low technical difficulty and low cost.

Optionally, the control method of the gas pressurization system further includes a replacement step. Specifically, as shown in FIG. 6 , the replacement step includes:

S01 , the scavenging solenoid valve 72 of the control gas supercharging system is opened, so that the gas to be replaced enters the first supercharging cavity 21 through the scavenging pipeline 71 .

S02 , controlling the pressure relief solenoid valve 82 of the gas booster system to open, so that the gas to be replaced is input into the second booster cavity 31 .

The gas to be replaced can enter the first boosting cavity 21 through the scavenging pipeline 71 and the first pipeline 9, and enter the second boosting cavity 31 through the first boosting cavity 21 and the fourth pipeline 500, and can It flows out from the pressure relief port through the second pressurizing cavity 31 , the second pipeline 50 and the pressure relief pipeline 81 . At this time, the primary supercharging device 2 and the secondary supercharging device 3 are filled with the gas to be replaced.

S03. After the preset time period, the scavenging solenoid valve 72 is closed.

S04. Input the gas to be pressurized into the first pressurization chamber 21 through the first inlet 201, so that the gas to be replaced is discharged from the pressure relief pipeline 81, so that the first pressurized chamber 21 and the gas to be replaced are replaced by the gas to be pressurized The gas to be replaced in the second pressurizing cavity 31 .

S05 , when there is no gas to be replaced in the first pressurizing chamber 21 , the second pressurizing chamber 31 and the pressure relief pipeline 81 , close the pressure relief solenoid valve 82 .

After the displacement step, the pressurization process can be carried out.

Optionally, the control method of the gas pressurization system may further include an air tightness detection step, and the specific execution process may be as follows: firstly, the gas pressurization system is connected to the hydrogen source, the nitrogen source and the air source. Then check by the controller that all solenoid valves are closed. Then start the air tightness test, open the scavenging solenoid valve 72 in the gas booster system, and boost the system pressure to 15Mpa, which mainly depends on the pressure of the connected nitrogen, and the system pressure is not limited to 15MPa, after reaching the pressure, control the scavenging solenoid valve 72 to close, and wait for 2 minutes, the controller in the system compares the front and rear pressures to make air tightness judgment. A purge step follows. When the pressurization is completed, the controller closes the gas injection solenoid valve 80 according to the pressure of the system, and opens the pressure relief solenoid valve 82. After observing that the second pressure gauge 100 indicates 0, remove the space between the gas pressurization system and the hydrogen tank. Connection.

The above embodiments only illustrate the basic principles and characteristics of the present invention. The present invention is not limited by the above embodiments. Without departing from the spirit and scope of the present invention, the present invention also has various changes and changes. These changes and changes are all fall within the scope of the claimed invention. The claimed scope of the present invention is defined by the appended claims and their equivalents.

Claims (14)

1. a gas pressurization system, is characterized in that, comprises: A pneumatic booster device includes a drive housing and a pneumatic piston movably arranged in the drive housing, the pneumatic piston divides the drive housing into two drive cavities, and the two drive cavities are respectively equipped with a drive air inlet; The first-stage supercharging device is connected to a driving cavity of the pneumatic supercharging device, and the pneumatic piston moves to pressurize the gas to be supercharged entering the first-stage supercharging device. 2 . The gas supercharging system according to claim 1 , further comprising a secondary supercharging device, and the secondary supercharging device is connected to another driving cavity of the pneumatic supercharging device and communicates with the other driving cavity. 3 . at the first outlet of the primary supercharging device, and the pneumatic piston moves to secondary pressurize the gas to be supercharged entering the secondary supercharging device. 3 . The gas supercharging system according to claim 2 , further comprising a gas supply solenoid valve, a gas injection solenoid valve and a controller, wherein the gas supply solenoid valve is arranged in a connection with the first-stage supercharging device. 4 . On the passage, the gas injection solenoid valve is arranged on the passage communicating with the secondary booster device, and the controller is controlled and connected to the gas supply solenoid valve and the gas injection solenoid valve, and is used to control the gas supply solenoid valve. The opening degree of the gas solenoid valve and the gas injection solenoid valve. 4. The gas pressurization system according to claim 3, characterized in that it further comprises a pressure relief pipeline and a pressure relief solenoid valve arranged on the pressure relief pipeline, and the pressure relief pipeline is communicated with the two pressure relief pipes. The pressure relief pipeline is used to discharge the gas in the secondary pressure booster, and the controller is controlled to be connected to the pressure relief solenoid valve and used to control the pressure relief solenoid valve. opening. 5 . The gas booster system according to claim 4 , further comprising a scavenging pipeline and a scavenging solenoid valve arranged on the scavenging pipeline, and the scavenging pipeline is connected to the first-stage booster. 6 . The scavenging pipeline is used to input the gas to be replaced into the first-stage supercharging device, and the controller is controlled to be connected to the scavenging solenoid valve and used to control the opening of the scavenging solenoid valve. 6. The gas supercharging system according to any one of claims 2-5, wherein the secondary supercharging device comprises a second supercharging cavity and a second supercharging piston, and the second supercharging The piston is movably arranged in the second pressurizing chamber, the part of the second pressurizing chamber on one side of the second pressurizing piston is connected to the other driving chamber, and the second pressurizing chamber The body is provided with a second inlet and a second outlet, the second inlet and the second outlet are located on the other side of the second pressurizing piston, and the second inlet is communicated with the first outlet, so The second pressurizing piston is connected to the pneumatic piston. 7. The gas supercharging system according to any one of claims 2-5, wherein the first-stage supercharging device comprises a first supercharging cavity and a first supercharging piston, and the first supercharging The piston is movably arranged in the first pressurizing chamber, and the part of the first pressurizing chamber on one side of the first pressurizing piston is connected to one of the driving chambers, and the first pressurizing chamber is connected to one of the driving chambers. The cavity is provided with the first outlet and the first inlet, the first outlet and the first inlet are located on the other side of the first pressurizing piston, and the first pressurizing piston is connected to the pneumatic piston. 8 . The gas supercharging system according to claim 7 , wherein a check valve is installed on the first inlet and the first outlet, respectively. 9 . 9. The gas boosting system of claim 7, wherein the cross-sectional dimension of the first boosting piston is smaller than the cross-sectional dimension of the pneumatic piston. 10. The gas supercharging system according to claim 4, further comprising a mechanical safety valve, wherein the mechanical safety valve is installed on the passage between the pressure relief pipeline and the secondary supercharging device, so that the The mechanical safety valve is used for automatically opening and releasing the pressure when the pressure of the gas booster system exceeds a preset pressure. 11. The gas supercharging system according to claim 5, further comprising a display device, through which an instruction can be input to the controller, and the controller is used to control the valve body according to the instruction On or off, the valve body includes one or more of the scavenging solenoid valve, the pressure relief solenoid valve, the gas supply solenoid valve and the gas injection solenoid valve. 12. A control method for a gas supercharging system, which is applied to the gas supercharging system of any one of claims 1-11, characterized in that it comprises the following steps: Input gas into a driving cavity through the driving gas inlet, so that the gas to be pressurized enters the first-stage supercharging device until the pneumatic piston meets the preset condition; Gas is input into another driving cavity through the driving gas inlet to drive the pneumatic piston to move and compress the gas to be pressurized entering the first-stage pressurizing device. 13. The control method of the gas supercharging system according to claim 12, characterized in that, the gas supercharging system further comprises a secondary supercharging device, and the secondary supercharging device is connected to the pneumatic supercharging device. The other driving cavity is connected to the first outlet of the first-stage supercharging device, and the control method of the gas supercharging system further includes the following steps: The pressurized gas to be pressurized flows into the secondary supercharging device through the first outlet of the primary supercharging device; Again, gas is input into a driving cavity through the driving gas inlet to drive the pneumatic piston to move and compress the gas to be boosted entering the secondary boosting device. 14. The control method of the gas pressurization system according to claim 13, characterized in that it further comprises a replacement step, and the replacement step comprises: The scavenging solenoid valve that controls the gas boosting system is opened, so that the gas to be replaced enters the first boosting cavity through the scavenging pipeline; Control the pressure relief solenoid valve of the gas booster system to open, so that the gas to be replaced is input into the second booster cavity; After a preset time period, close the scavenging solenoid valve; The gas to be pressurized is input into the first pressurization chamber through the first inlet, so that the gas to be replaced is discharged from the pressure relief pipeline to replace the first pressurized chamber and the second pressurized chamber the gas to be replaced; When there is no gas to be replaced in the first pressurizing chamber, the second pressurizing chamber and the pressure relief pipeline, the pressure relief solenoid valve is closed.

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