KR102419197B1 - Flowmeter for controlling the opening and closing of valve remotely - Google Patents

Abstract

The present invention discloses a flow meter for remote control of valve opening and closing. Specifically, in the flow meter provided between the hydraulic pressure generating means and the valve actuator that opens and closes the valve, it measures the flow rate and informs the opening and closing degree of the valve. A body provided with a measurement space in which a ball is formed, first and second gears rotatably provided in the measurement space and toothed to each other, and an input shaft and an output shaft embedded in the body in front of the second gear a flow rate measuring unit including a reduction gear formed therein, and a connecting shaft connecting the input shaft and the second gear; A case coupled to the front of the body, a drive shaft rotatably installed inside the case and coupled to the output shaft, an indicator shaft coupled to the drive shaft, and an indicator needle coupled to an end of the indicating shaft; , an indicator unit including a transparent window coupled to the front of the case; the hydraulic oil entering and exiting through the hydraulic oil inlet hole rotates the first gear and the second gear, and the speed reducer is the second gear. The rotation may be reduced, and the opening/closing state of the valve may be recognized from the indicator unit linked to the reducer.

Description

Flowmeter for controlling the opening and closing of valve remotely

The present invention relates to a flow meter, and more particularly, to a flow meter for remote control of valve opening/closing for remotely controlling the opening/closing state of a valve opened and closed by an actuator.

A variety of valves are used in ships, and in the case of a large-capacity valve, a hydraulic actuator is used to open and close it.

This valve actuator is provided at one end of the hydraulic line to open and close the valve according to the forward or reverse supply of hydraulic oil.

And the hydraulic line is circulated by the hydraulic pump. Therefore, the hydraulic oil may be discharged from one side of the valve actuator and introduced to the other side (forward circulation), or discharged from the other side and introduced into one side. (reverse circulation)

The valve actuator can be any device capable of opening and closing the valve by hydraulic pressure, and can be switched to the circulation direction by a directional switching valve (solenoid valve).

However, since the valve is often installed at a long distance, it is not easy for the operator to grasp the open/closed state.

Therefore, when remotely controlling the opening and closing of the valve, a flow meter that recognizes the degree of opening and closing of the valve is used.

The flowmeter is provided on the hydraulic line and detects the open/closed state of the valve by detecting the flow rate and flow rate change of the hydraulic oil generated according to the operation of the hydraulic pump. can do it

More specifically, Figure 1 is a configuration diagram showing a conventional remote valve control system.

Briefly, in a flowmeter for a remote valve control system (VRCS) that is formed between the hydraulic pressure generator 20 and the valve actuator 300 and senses the flow of hydraulic pressure, the hydraulic generator ( 20) and a rotor 100 that is formed in the fluid pipe connecting the valve actuator 300 and rotates according to the flow of the fluid; a sensor 120 that detects the rotation amount and direction of the rotor 100 and transmits it as an electrical signal; It is composed of a signal processor 130 that receives a signal from the sensor 120 and outputs open/close information of the valve actuator 300 by analyzing the forward and reverse direction and flow rate of the fluid.

Here, a flowmeter is a sensor for measuring the flow of a fluid, and is a device for detecting a flow rate or flow rate of a gas or liquid as an electrical signal. Flow rate refers to the ratio of the volume or mass of a fluid flowing through an arbitrary cross-section to time. Therefore, the measurement of flow or flow rate occupies a very important part in electrical and electronic, civil engineering, machinery, aviation, environment, medicine and general industries.

In the case of the prior art, as a rotor type flowmeter, when the rotor placed in the flow passage of the fluid rotates, this rotation is calculated to calculate the flow rate and flow rate flowing through the current passage so that the user can see it. To this end, it consists of a mechanical rotor part and an electronic part including a sensor for measuring the rotation of the rotor.

However, there is a problem in that the rotor rotates due to various causes even if the actuator does not operate during actual operation.

Republic of Korea Patent 10-1184407 (2012.9.13.) "Flow meter for remote valve control system" Republic of Korea Patent Registration 10-1657942 (2016.9.9.) "Underwater valve position detection device" Republic of Korea Registered Utility Model 20-0382037(2005.4.7.) "Open/close display device of manual remote valve for ships"

Accordingly, the present invention is to solve the above problems, and an object of the present invention is to provide a flow meter for remote control of valve opening and closing that can remotely check and control the correct opening and closing state of a valve using a gear rotation type flow meter.

A flow meter for remote control of valve opening and closing according to the present invention for achieving the above object is a flow meter provided between a hydraulic pressure generating means and a valve actuator for opening and closing the valve to measure the flow rate and inform the degree of opening and closing of the valve, the solenoid valve and A body provided between the manifolds and provided with a measurement space in which a pair of hydraulic oil inlet and out holes are formed while forming an ellipse, first and second gears rotatably provided in the measurement space and toothed to each other, and the body; a flow rate measuring unit including a speed reducer embedded in the interior of the second gear in front of the second gear and having an input shaft and an output shaft, and a connecting shaft connecting the input shaft and the second gear; A case coupled to the front of the body, a drive shaft rotatably installed inside the case and coupled to the output shaft, an indicator shaft coupled to the drive shaft, and an indicator needle coupled to an end of the indicating shaft; , an indicator unit including a transparent window coupled to the front of the case; the hydraulic oil entering and exiting through the hydraulic oil inlet hole rotates the first gear and the second gear, and the speed reducer is the second gear. The rotation may be reduced, and the opening/closing state of the valve may be recognized from the indicator unit linked to the reducer.

Here, a potentiometer is further provided on one side of the indicating shaft, and may be installed to be interlocked with each other by a spur gear.

In addition, a through flow passage crossing the body may be formed so that the hydraulic oil introduced into the manifold is directly supplied to the solenoid valve.

According to the present invention described above, the sensor does not detect the rotation speed of the gear to measure the flow rate, but rotates the gear with the hydraulic oil of hydraulic oil and reduces the rotation speed while displaying it on the indicator in proportion to the flow rate, so there is little error .

In addition, if the reduction ratio is adjusted by replacing the reduction gear, there is an advantage in that actuators of various capacities can be controlled.

1 is a block diagram showing a conventional remote valve control system;
2 is a block diagram showing the structure of a valve opening and closing remote control system including the present invention;
3 is a cross-sectional view showing the internal structure of a flow meter for remote control of valve opening and closing according to an embodiment of the present invention;
Figure 4 is a front view showing the first gear and the second gear of the present invention shown in Figure 3;
5 is a front view of the indicator unit of the present invention shown in FIG.
6 is a flowchart showing the flow of hydraulic oil when the valve opens and closes

Hereinafter, an embodiment according to the present invention will be described in more detail with reference to the accompanying drawings.

For reference, the description with reference to the drawings is for better understanding of the present invention, and the scope of the present invention is not limited thereto. And, in describing the present invention, when it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

2 is a block diagram showing the structure of a valve opening/closing remote control system including the present invention.

Before describing the present invention in detail, the overall system of the present invention with reference to the bar shown in FIG. 2 is a hydraulic oil supply device 40 for supplying hydraulic pressure, including a hydraulic oil tank and a hydraulic pump, the hydraulic supply device 40 The hydraulic oil supplied from is supplied to the actuator 50 through the hydraulic line to operate the actuator 50 . And between the actuator 50 and the hydraulic pressure supply device 40, a flow meter 10 for remote control of the valve opening and closing of the present invention is provided.

At this time, the manifold block 20 may be attached to one side of the flow meter 10 , and the solenoid valve 30 may be attached to the other side.

The manifold block 20 may be connected to a plurality of various actuators 50 , and the solenoid valve 30 is a valve for switching the supply direction of hydraulic oil.

Therefore, the hydraulic oil supplied from the hydraulic supply device 40 flows into the manifold block 20 through the hydraulic line, is distributed in the manifold block 20, and passes through the flow meter 10 to the solenoid It flows into the valve 60 . And the solenoid valve (30) selects the valve open (open) or closed (close) is sent back to the flow meter (10).

Here, as the hydraulic oil introduced from the solenoid valve 60 passes through the flow meter 10, the flow rate is measured and the opening/closing state of the valve is displayed to the operator in proportion to the measured flow rate.

The hydraulic oil passing through the flow meter 10 is supplied to the actuator 50 to operate the valve.

3 is a cross-sectional view showing the internal structure of a flow meter for remote control of valve opening/closing according to an embodiment of the present invention, and FIG. 4 is a front view showing the first gear and the second gear of the present invention shown in FIG.

The present invention can be largely composed of a flow measurement unit 100 for measuring the flow rate of hydraulic oil, and an indicator unit 200 for displaying the open/closed state of the valve according to the flow rate measured by the flow rate measurement unit 100 .

First, the flow measurement unit 100 will be described.

The flow measuring unit 100 may include a body 110 , a first gear 120 and a second gear 130 , a reduction gear 140 , and a connecting shaft 150 .

The body 110 has a rectangular block shape and is installed between the solenoid valve 30 and the manifold block 20 . That is, the manifold block 20 is coupled to one side of the body 110 , and the solenoid valve 30 is coupled to the other side.

And a measurement space 111 in which the first gear 120 and the second gear 130 are installed is formed inside the body 110 .

The measurement space 111 has an elliptical or track shape in cross section. This is to be installed inside the first gear 120 and the second gear 130 in a meshed state.

At this time, in the measurement space 111, a pair of entrance and exit holes 112 communicating with the outside are formed to be spaced apart.

The entry hole 112 is a hole through which the hydraulic oil enters and exits, and as shown in FIG. 4 , it may be formed to be vertically spaced apart between the first gear 120 and the second gear 130 that are connected to each other. , when hydraulic oil flows into the upper entry hole 112a, it flows out into the lower entry hole 112b or, conversely, when it flows into the lower entry hole, it may flow out into the upper entry hole 112a.

More specifically, it can be formed vertically on the side surface of the measurement space 111 as shown in FIG. have.

On the other hand, one or more through passages 113 penetrating left and right from one side of the body 110 to the other side are formed.

The through passage 113 allows the hydraulic oil introduced into the manifold block 20 to be directly transferred to the solenoid valve 30 .

In addition, a flow path communicating with the entry hole 112 is formed in the body 110 .

Specifically, a first open flow path 114 and a first closed flow path 115 are formed on one side of the body 110, that is, a side to which the solenoid valve 30 is attached, and the other side, that is, the manifold A second open passage 116 and a second closed passage 117 are formed on the side to which the block 20 is attached.

At this time, the first open flow path 114 is a flow path for guiding the hydraulic oil from the solenoid valve 30 to the measurement space 111 when the valve is opened, and any one of the in/out holes 112, for example, the upper access It communicates with the ball 112a. And the second open passage 116 is provided to communicate with the lower entry hole (112b).

Conversely, the first closed flow path 115 is a flow path for guiding the hydraulic oil from the solenoid valve 30 to the measuring space 111 when the valve is closed, and the other one of the in/out holes 112, for example, the lower access hole It communicates with (112b). To this end, it may be formed in the form of a branch flow path of the second open flow path 116 . In addition, the second closed flow path 117 is provided to communicate with the upper entry hole 112a, and for this purpose, it may be formed in the form of a branch flow path of the first open flow path 114 .

Next, the first gear 120 and the second gear 130 will be described.

The first gear 120 and the second gear 130 are rotatably installed in the measurement space 111 , and are toothed and interlocked with each other.

To this end, the first gear 120 and the second gear 130 may be rotatably supported by needle bearings 121 and 131 , respectively.

Therefore, the hydraulic oil introduced through the entry hole 112 rotates the first gear 120 and the second gear 130 while passing between the first gear 120 and the second gear 130, and the other Since it is discharged through the entrance hole 112 , the flow rate may be measured according to the number of rotations of the first gear 120 and the second gear 130 .

Next, the reduction gear 140 and the connecting shaft 150 will be described.

The reducer 140 is interlocked with the second gear 130 to reduce the rotation of the second gear 130 .

The reducer 140 is embedded in the body 110, and positioned in front of the second gear 130, an input shaft 141 to which rotation before deceleration is input, and an output shaft to which rotation after deceleration is output ( 142) is formed.

And the reduction gear 140 is connected to the second gear 130 by the connecting shaft 150 .

For reference, the reduction ratio of the reduction gear 140 may be variously provided such as 240:1, 480:1, etc. according to the flow rate of the hydraulic oil.

The flow rate of the hydraulic oil is the total amount of hydraulic oil required for one stroke of the actuator 50, and the number of revolutions of the first gear 120 and the second gear 130 is reduced due to the hydraulic oil supplied during one stroke of the actuator to be described later. It is possible to recognize the opening and closing of the valve in the indicator unit 200 .

Accordingly, if the reduction gear is replaced and the reduction ratio is adjusted, it is possible to measure and control actuators of various sizes and types having different flow rates.

Next, the indicator unit 200 will be described with reference to FIG. 5 . FIG. 5 is a front view of the indicator unit of the present invention shown in FIG. 3 .

The indicator unit 200 is provided in front of the body 110 , and includes a case 210 , a drive shaft 220 , an indicator shaft 230 , an indicator needle 240 , and a transparent window 250 . can be configured.

The case 210 is coupled to the front of the body 110 and accommodates the driving shaft 220, the indicating shaft 230, the indicator needle 240, the transparent window 250 and the potentiometer 260 therein. space is created for

A hole is formed in one side of the case 210 to communicate with the output shaft 142 of the reduction gear 140 .

A driving shaft 220 connected to the output shaft 142 of the reduction gear 140 is provided inside the case 210 .

And the indicating shaft 230 is coupled to the driving shaft 220 .

The indicating shaft 230 has a hollow shape so that the driving shaft 220 can be inserted thereinto.

In addition, an indicator needle 240 is coupled to the outer peripheral surface of the end of the indicating shaft 230 .

The indicator needle 240 is fastened to the end of the driving shaft 220 with a locking nut 241 as a visual indication of the open/closed state of the valve according to the rotation of the driving shaft 220 .

The indicating shaft 230 is fixed to an indicating plate 231 , and information on opening and closing the valve (open, close) may be displayed on the surface of the indicating plate 231 .

A transparent window 250 is coupled to the front of the case 210 so that the inside can be seen.

Preferably, a potentiometer 260 may be further installed on one side of the indicating shaft 230 .

The potentiometer is a variable resistor and controls the current by changing the resistance. The potentiometer 260 is linked with the indicator shaft 230 to generate a separate electrical signal, and by using the potentiometer 260, a warning light can be turned on for each color.

The spur gears 232 and 261 are coupled to the shafts of the indicating shaft 230 and the potentiometer 260 so that the potentiometer 260 is interlocked with the indicating shaft 230 and meshed with each other.

Hereinafter, the operation of the present invention will be described with reference to FIG. 6 . 6 is a flowchart illustrating a flow of hydraulic oil when a valve is opened and closed. Fig. 6(a) shows the valve opening, and Fig. 6(b) shows the valve closing time.

First, when the valve is opened, hydraulic oil is supplied from the hydraulic supply device 40 and flows into the manifold block 20 , passes through the through passage 113 of the body 110 and flows into the solenoid valve 30 . do.

The solenoid valve 30 guides the introduced hydraulic oil to the first open passage 114, and through the first open passage 114, the hydraulic oil flows into the upper inlet hole 112a while the first gear ( 120) and the second gear 130 are rotated forward.

The rotation of the second gear 130 is decelerated through the speed reducer 140 , and the indicator needle 240 coupled to the decelerated indicating shaft 230 starts to rotate from the closed state to the open state.

The hydraulic oil introduced into the upper entry hole 112a flows out to the second open passage 116 through the lower entry hole 112b, and then passes through the manifold block 20 to open the actuator 50. make it work

Conversely, when the valve is closed, the hydraulic oil supplied from the hydraulic supply device 40 flows into the solenoid valve 30 through the manifold block 20 and the through passage 113 .

The solenoid valve 30 guides the introduced hydraulic oil to the first closed passage 115, and the hydraulic oil flows through the first closed passage 115 into the lower inlet hole 112b while the first gear ( 120) and the second gear 130 are rotated in the reverse direction.

The rotation of the second gear 130 starts to rotate from the open state to the closed state of the indicator needle 240 via the speed reducer 140 and the indicating shaft 230 .

The hydraulic oil introduced into the lower entry hole 112b flows out to the second closed flow path 117 through the upper entry hole 112a, and then passes through the manifold block 20 and the actuator 50 operates the valve. operate to close.

Although a representative embodiment of the present invention has been described above with reference to the drawings, those skilled in the art to which the present invention pertains will be able to make various applications and modifications within the scope of the present invention based on the above content. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined by the claims described below as well as the claims and equivalents.

10: flow meter 20: manifold block
30: solenoid valve 40: hydraulic supply
50: actuator 60: valve
100: flow measuring part
110: body 111: measurement space
112: entry hole 112a: upper entry hole
112b: lower entrance hole 113: through passage
114: first open flow path 115: first closed flow path
116: 2nd open flow path 117: 2nd closed flow path
120: first gear 121: needle bearing
130: second gear 131: needle bearing
140: reducer 141: input shaft
142: output shaft 150: connection shaft
200: indicator part
210: case 220: drive shaft
230: indicating axis 231: indicating plate
232: spur gear 240: pointer needle
241: locking nut 250: transparent window
260: potentiometer 261: spur gear

Claims (3)

It is provided between the hydraulic pressure generating means and the valve actuator that opens and closes the valve to measure the flow rate and inform the opening/closing degree of the valve. It is provided between the solenoid valve and the manifold and has an elliptical shape inside and a pair of hydraulic oil inlet/outhole is formed. a body provided with this, first and second gears rotatably provided in the measurement space and toothed to each other, and a reducer embedded in the body in front of the second gear and having an input shaft and an output shaft; a flow measurement unit including a connecting shaft connecting the input shaft and the second gear; A case coupled to the front of the body, a drive shaft rotatably installed inside the case and coupled to the output shaft, an indicator shaft coupled to the drive shaft, and an indicator needle coupled to an end of the indicating shaft; , an indicator unit including a transparent window coupled to the front of the case; the hydraulic oil entering and exiting through the inlet hole rotates the first gear and the second gear, and the speed reducer rotates the second gear In the valve opening/closing remote control flow meter capable of decelerating and recognizing the opening/closing state of the valve in the indicator unit linked to the reducer,
A through-flow passage crossing the body is formed so that the hydraulic oil introduced into the manifold is directly supplied to the solenoid valve,
On one side of the body to which the solenoid is attached, a first open passage connecting the solenoid and the upper access hole of the measurement space and a first closed passage connecting the solenoid and the lower access hole of the measurement space are formed,
On the other side of the body to which the manifold block is attached, a second open passage connecting the manifold and the lower access hole of the measurement space and a second closed passage connecting the manifold and the upper access hole of the measurement space A flow meter for remote control of valve opening and closing, characterized in that it is formed. The method of claim 1,
A potentiometer is further provided on one side of the indicating shaft,
A flow meter for remote control of valve opening and closing, characterized in that it is installed to be interlocked with each other by spur gear. delete

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