Stop valve performance detection device

Abstract

The utility model discloses a stop valve performance detection device, which relates to the technical field of valve performance detection and comprises a stop valve, a valve closing device, a performance detection controller, a pressure regulating valve, a gas cylinder, a pressure release valve, a pressure transmitter, a valve opening device, a pipeline group and a connecting line, wherein a valve closing device and a gas cylinder are arranged on the top and the side face of the stop valve respectively, and a valve opening device is installed on the stop valve control box body; the gas cylinder, the pressure regulating valve, the pressure release valve, the pressure transmitter and the stop valve are connected through a pipeline group, and the performance detection controller is connected with the valve closing device, the valve opening device and the pressure transmitter through connecting wires. According to the invention, the mode that a traditional pressure test and a response time test need to be carried out separately is broken through, the high-low pressure cut-off pressure test and the cut-off response time test can be carried out synchronously, the repeated test steps and times are reduced, the detection process is simplified, the detection efficiency is remarkably improved, and the overall detection time consumption of a single cut-off valve is greatly shortened.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve performance detection technical field, concretely relates to a kind of cut-off valve performance detection device. BACKGROUND

[0002] Cut-off valve is the key equipment to ensure safety in industrial process, used to isolate medium quickly in abnormal conditions (such as overpressure, leakage, fire, etc.), prevent accidents from expanding, its core performance requirements include response speed, sealing, pressure resistance and reliability. Cut-off valve performance detection is an important link to verify its function, usually contains multiple tests. Such as sealing test, detect the leakage of valve body and valve seat by pressurization, ensure compliance with standards; Cut-off pressure precision test, test the actual value of high and low cut-off pressure to calculate the deviation from the set value; Action life test, simulate frequent switching scenarios, verify the durability of mechanical structure; Response time test, record the time length from trigger signal to complete closure.

[0003] The existing cut-off valve cut-off pressure precision test (including high and low cut-off pressure test) and cut-off response time test, generally use manual detection, which is greatly affected by the operator's level and has low detection accuracy. In high and low cut-off pressure test, manual pressure gauge reading is used, and since the pressure gauge value is dynamically displayed, the test reading deviation is large. In cut-off response time test, stopwatch or timer is used for manual timing, and the measurement accuracy is low. Moreover, it cannot realize synchronous high and low cut-off pressure test and response time test, and the test steps are many, with low test efficiency.

[0004] Therefore, a cut-off valve performance detection device is needed to solve the above technical problems. UTILITY MODEL CONTENTS

[0005] To achieve the above purpose, the utility model provides the following technical scheme, a kind of cut-off valve performance detection device, comprising: cut-off valve, valve closing device, performance detection controller, pressure regulating valve, gas cylinder, pressure relief valve, pressure transmitter, valve opening device, pipeline group and connecting line;

[0006] Among them, the top and side of the cut-off valve are respectively provided with the valve closing device and the gas cylinder, and the valve opening device is installed on the cut-off valve control box body;

[0007] The gas cylinder, the pressure regulating valve, the pressure relief valve, the pressure transmitter and the cut-off valve are connected through the pipeline group, and the performance detection controller is connected with the valve closing device, the valve opening device and the pressure transmitter through the connecting line;

[0008] The valve opening device comprises a first mounting seat, a gland, a switch rod, a push rod, a valve opening spring, a connecting sleeve, a microswitch and a fixed block.

[0009] The first mounting seat is arranged inside the cut-off valve through the fixing block, one end of the first mounting seat is provided with the gland, the other end is provided with the connecting sleeve, and the push rod is slidably arranged in the first mounting seat;

[0010] One end of the push rod penetrates through the gland and extends to the outside of the first mounting seat, and the other end penetrates through the first mounting seat and extends to the inside of the connecting sleeve;

[0011] The connecting sleeve is provided with the micro switch, the switch rod is rotatably connected in the cut-off valve, and the push rod is provided with the valve opening spring connected to the inside of the first mounting seat.

[0012] Further, as a preferred, one end of the push rod away from the connecting sleeve is provided with a guide surface, and one end of the switch rod close to the push rod is provided with a contact surface.

[0013] Further, as a preferred, the pipeline group comprises a main pipe and a branch pipe;

[0014] The main pipe is sequentially communicated with the gas cylinder, the pressure regulating valve, the pressure transmitter and the cut-off valve, and the pressure relief valve is communicated with the branch pipe at a position between the pressure regulating valve and the pressure transmitter on the main pipe.

[0015] Further, as a preferred, the cut-off valve comprises an actuator, a valve rod and a valve body;

[0016] The valve rod is arranged in the actuator, the valve body is arranged at the bottom end of the actuator, one end of the valve rod away from the valve body is connected with the valve closing device, and the locking device is arranged in the actuator;

[0017] The first mounting seat is arranged in the actuator, and one end of the switch rod away from the contact surface is rotatably connected with the locking device.

[0018] Further, as a preferred, the actuator is provided with a detection component, and the valve body is provided with a closing spring.

[0019] Further, as a preferred, the valve closing device comprises a second mounting seat, a switch frame, a travel switch, a valve position rod, a trigger head and a guide sleeve;

[0020] The second mounting seat is arranged on the top plate of the cut-off valve, the switch frame is arranged on the second mounting seat through bolts, and the travel switch is arranged on the switch frame;

[0021] The second mounting seat is internally provided with the guide sleeve, the valve position rod is slidably arranged in the guide sleeve, one end of the valve position rod penetrates the cut-off valve top plate and is connected with the valve rod, and the other end is provided with the trigger head.

[0022] Further, as preferred, the trigger head is provided with a trigger inclined surface matched with the outer wall arc surface of the roller operating head in the travel switch.

[0023] Further, as preferred, the guide surface is provided with an inclined portion away from one side of the push rod, and the inclined surface of the inclined portion is arranged to face the return direction of the switch rod.

[0024] Further, as preferred, the contact surface is rotatably provided with an anti-abrasion wheel, and the outer wall arc surface of the anti-abrasion wheel is matched with the inclined surface of the inclined portion.

[0025] Compared with the prior art, the cut-off valve performance detection device has the following beneficial effects:

[0026] Advantage one: in the embodiment, the manual reading of the dynamic pressure gauge is replaced, the manual reading deviation is avoided, the accurate detection of the high-low pressure cut-off pressure is realized, the valve opening device and the valve closing device are used to collect the accurate signals of the cut-off start and the closing to position respectively, the response time is automatically calculated by the performance detection controller, the manual stopwatch timing is replaced, the human operation delay or judgment error is eliminated, and the response time detection precision is significantly improved.

[0027] Advantage two: in the embodiment, the traditional pressure test and response time test are performed separately, the high-low pressure cut-off pressure test and the cut-off response time test can be performed synchronously, the repeated test steps and times are reduced, the detection process is simplified, the detection efficiency is significantly improved, and the overall detection time of a single cut-off valve is greatly shortened. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a cut-off valve performance detection device structure schematic view;

[0029] Figure 2 It is a cut-off valve performance detection device valve opening device structure schematic view;

[0030] Figure 3 It is a cut-off valve performance detection device switch rod return reset schematic view;

[0031] Figure 4 It is a cut-off valve performance detection device valve closing device structure schematic view;

[0032] Figure 5 It is a cut-off valve performance detection device valve position rod downward movement schematic view;

[0033] In the figure: 1, cut-off valve; 11, actuator; 111, locking device; 12, valve stem; 13, valve body; 2, valve closing device; 21, second mounting seat; 22, switch frame; 23, travel switch; 24, valve position rod; 25, trigger head; 251, trigger inclined surface; 26, guide sleeve; 3, performance detection controller; 4, pressure regulating valve; 5, gas cylinder; 6, pressure relief valve; 7, pressure transmitter; 8, valve opening device; 81, first mounting seat; 82, gland; 83, switch rod; 84, push rod; 85, valve opening spring; 86, connecting sleeve; 87, micro switch; 88, fixed block; 9, pipeline group; 91, main pipe; 92, branch pipe; 10, connecting line; 14, guide surface; 141, inclined part; 15, contact surface; 151, anti-wear wheel. DETAILED DESCRIPTION

[0034] Please refer to Figures 1-5 The utility model provides a kind of cut-off valve performance detection device, comprising: cut-off valve 1, valve closing device 2, performance detection controller 3, pressure regulating valve 4, gas cylinder 5, pressure relief valve 6, pressure transmitter 7, valve opening device 8, pipeline group 9 and connecting line 10;

[0035] Wherein, cut-off valve 1 top and side are provided with valve closing device 2 and gas cylinder 5 respectively, and valve opening device 8 is installed on the control box of cut-off valve 1.

[0036] Gas cylinder 5, pressure regulating valve 4, pressure relief valve 6, pressure transmitter 7 and cut-off valve 1 are connected by pipeline group 9, and performance detection controller 3 is connected with valve closing device 2, valve opening device 8 and pressure transmitter 7 by connecting line 10.

[0037] In the embodiment, the components of the device are made of high-strength alloy materials, among which the cut-off valve 1 is made of high-pressure-resistant carbon steel to ensure its structural stability in high-pressure testing scenarios. The performance detection controller 3 is built-in with high-precision control processing chips, which can quickly receive and process pressure signals and switch signals. The gas cylinder 5 is selected as a high-pressure gas cylinder with a rated pressure not less than the gas source demand in high-pressure cut-off pressure testing. It should be noted that the materials of the components of the device are not limited to the above materials, and can be adjusted according to actual conditions.

[0038] As a preferred embodiment, the gas cylinder 5 provides gas source for the whole device, the pressure regulating valve 4 is used to increase the overall pressure of the device, the pressure relief valve 6 is used to reduce the overall pressure of the device, and the pressure transmitter 7 is used to detect the overall pressure of the device and transmit the detection results to the performance detection controller 3.

[0039] Further, the valve opening device 8 includes: a first mounting seat 81, a gland 82, a switch rod 83, a push rod 84, a valve opening spring 85, a connecting sleeve 86, a micro switch 87, and a fixed block 88.

[0040] The first mounting seat 81 is arranged inside the cut-off valve 1 through the fixing block 88, one end of the first mounting seat 81 is provided with the gland 82, the other end is provided with the connecting sleeve 86, and the push rod 84 is slidingly arranged in the first mounting seat 81;

[0041] One end of the push rod 84 penetrates through the gland 82 and extends to the outside of the first mounting seat 81, and the other end penetrates through the first mounting seat 81 and extends to the inside of the connecting sleeve 86;

[0042] The connecting sleeve 86 is provided with the micro switch 87, the switch rod 83 is rotationally connected in the cut-off valve 1, and the outer wall of the push rod 84 is sleeved with the valve opening spring 85 connected to the inside of the first mounting seat 81.

[0043] In the embodiment, clearance fit is adopted between the components of the valve opening device 8, so that the push rod 84 can slide smoothly without jamming.

[0044] Further, one end of the push rod 84 away from the connecting sleeve 86 is provided with a guide surface 14, and one end of the switch rod 83 close to the push rod 84 is provided with a contact surface 15.

[0045] In the embodiment, the guide surface 14 and the contact surface 15 are both subjected to polishing treatment to reduce frictional resistance in the transmission process. The inclination angle of the guide surface 14 is preferably designed to be 30°, but is not limited thereto and can be adjusted according to actual requirements. The contact area of the contact surface 15 when abutting against the guide surface 14 should be able to ensure uniform transmission of the pushing force and avoid excessive local stress to cause deformation of the components.

[0046] Further, the pipeline set 9 includes a main pipe 91 and a branch pipe 92.

[0047] The main pipe 91 is sequentially connected with the gas cylinder 5, the pressure regulating valve 4, the pressure transmitter 7 and the cut-off valve 1, and the main pipe 91 is connected with the pressure relief valve 6 through the branch pipe 92 at a position between the pressure regulating valve 4 and the pressure transmitter 7.

[0048] In the embodiment, the pipe diameters of the main pipe 91 and the branch pipe 92 need to be adapted to the gas flow demand in the test process, and all the interfaces of the pipeline set 9 need to be welded and then subjected to air tightness detection to ensure no leakage before being put into use. The adjustment accuracy of the pressure regulating valve 4 needs to meet the accurate adjustment demand of the high-low pressure cut-off pressure.

[0049] Further, the cut-off valve 1 includes an actuator 11, a valve rod 12 and a valve body 13.

[0050] The valve rod 12 is arranged in the actuator 11, the actuator 11 is provided with the valve body 13 at the bottom end, one end of the valve rod 12 away from the valve body 13 is connected with the valve closing device 2, and the actuator 11 is provided with a locking device 111.

[0051] The first mounting seat 81 is arranged inside the actuator 11, and the switch rod 83 is rotationally connected to the locking device 111 at the end away from the contact surface 15.

[0052] In the embodiment, the valve rod 12 is made of stainless steel and is subjected to nitriding treatment on the surface to improve wear resistance and corrosion resistance. The connection between the locking device 111 and the switch rod 83 is achieved by a pin shaft made of high-strength alloy steel, and a rolling bearing is installed at the joint to reduce the rotation resistance. The rotation angle range of the switch rod 83 needs to ensure that it can effectively push the push rod 84 to complete all actions.

[0053] Further, a detection component is arranged inside the actuator 11, and a closing spring is arranged inside the valve body 13.

[0054] In the embodiment, the detection component inside the actuator 11 is a mechanical pressure sensor, and the locking device 111 is a mechanical locking mechanism that remains locked in the normal open state of the shut-off valve 1 and is quickly unlocked when the shut-off action is triggered. The closing spring is a cylindrical coil spring, and its elastic coefficient needs to ensure that it can provide sufficient closing power to completely close the shut-off valve 1 within a specified time.

[0055] Further, the valve closing device 2 comprises a second mounting seat 21, a switch frame 22, a travel switch 23, a valve position rod 24, a trigger head 25, and a guide sleeve 26.

[0056] The second mounting seat 21 is arranged on the top plate of the shut-off valve 1, and the switch frame 22 is mounted on the second mounting seat 21 by bolts. The travel switch 23 is arranged on the switch frame 22.

[0057] The guide sleeve 26 is arranged inside the second mounting seat 21, the valve position rod 24 is slidably arranged inside the guide sleeve 26, one end of the valve position rod 24 penetrates the top plate of the shut-off valve 1 and is connected to the valve rod 12, and the other end is provided with the trigger head 25.

[0058] In the embodiment, the surface roughness of the inner wall of the guide sleeve 26 needs to ensure smooth sliding of the valve position rod 24. The valve position rod 24 is connected to the valve rod 12 by threads and is provided with a lock nut to prevent loosening during long-term use. The installation position of the switch frame 22 can be adjusted by bolts to facilitate calibration of the relative positions of the travel switch 23 and the trigger head 25.

[0059] As a preferred embodiment, the valve closing device 2 directly reflects the on-off state of the shut-off valve 1, and the swing of the switch rod 83 represents the start of the shut-off action of the shut-off valve 1.

[0060] First, during the high-pressure shut-off pressure and response time test of shut-off valve 1: open shut-off valve 1 to the open state and adjust pressure regulating valve 4 to slowly increase the overall pressure of the device until the high-pressure shut-off pressure is reached. When the detection component in actuator 11 detects that the overall pressure of the device has reached the high-pressure shut-off pressure, it will control locking device 111 to perform two operations simultaneously: control switch lever 83 to swing and release valve lever 12 to close shut-off valve 1. Specifically as follows:

[0061] The switch lever 83 begins to swing under the action of the closing spring (e.g.) Figure 2 (As indicated by the middle arrow), the contact surface 15 will disengage from the guide surface 14. Under the action of the valve opening spring 85, the push rod 84 will move upward in the vertical direction, thereby causing the bottom end of the push rod 84 to leave the micro switch 87. The micro switch 87 transmits the position status signal of the switch rod 83 to the performance detection controller 3. At this time, the performance detection controller 3 starts timing, and at the same time, the pressure transmitter 7 transmits the system pressure during the high-pressure cut-off action to the performance detection controller 3.

[0062] At the same time, valve stem 12 begins to move downwards in the vertical direction (e.g.) Figure 5 As indicated by the arrow, the swing of the switch lever 83 represents the start of the shut-off valve 1 closing, and simultaneously drives the valve position lever 24 downward to perform the shut-off valve 1 closing operation (at this time, the micro switch 87 has already started to act and transmit signals, but the valve lever 12 needs a certain amount of time to move downward, thus creating a time interval). When the closing operation is completed, the valve position lever 24 reaches the closed state, that is, the trigger head 25 disengages from the roller operating head in the limit switch 23, the roller operating head is released and triggers the limit switch 23. The limit switch 23 transmits the shut-off valve 1 closed signal to the performance detection controller 3. At this time, the performance detection controller 3 stops timing and calculates the response time (the time between the triggering of the micro switch 87 and the triggering of the limit switch 23). After the calculation is completed, the high-pressure shut-off pressure and response time are displayed on the display screen installed on it. Thus, the high-pressure shut-off pressure and response time test of the shut-off valve 1 is completed.

[0063] Second, when testing the low-pressure cut-off pressure and response time of the cut-off valve 1: open the cut-off valve 1 to the open state and adjust the pressure regulating valve 4 to make the overall device pressure between the high and low pressure cut-off pressures. Then open the pressure relief valve 6 and slowly reduce the overall device pressure until the low-pressure cut-off pressure is reached. When the detection component in the actuator 11 detects that the overall device pressure reaches the low-pressure cut-off pressure, it controls the locking device 111 to simultaneously perform two operations: control the swing of the switch lever 83 and release the valve lever 12 to close the cut-off valve 1. The subsequent specific operations are consistent with those when testing the high-pressure cut-off pressure and response time of the cut-off valve 1, and finally, the low-pressure cut-off pressure and response time are displayed on the display screen of the performance detection controller 3 after calculation. At this point, the low-pressure cut-off pressure and response time test of the cut-off valve 1 is completed.

[0064] It should be noted that, for example: the high-pressure cut-off pressure is 5.0 MPa, and the low-pressure cut-off pressure is 1.0 MPa. When the working pressure is greater than 1.0 MPa or less than 5.0 MPa, the cut-off valve 1 will not act. When the working pressure is less than or equal to 1.0 MPa or greater than or equal to 5.0 MPa, the cut-off valve 1 performs the cut-off action. The high and low pressure cut-off pressure values are not limited to the above values and can be adjusted according to actual conditions.

[0065] As a preferred embodiment, the valve opening device 8 transmits the drive structure of the switch lever 83 and the locking device 111 linkage and the valve opening spring 85 pushing the push rod 84, so that the initial action of the cut-off valve 1 can be quickly converted into a signal change of the microswitch 87, providing a precise timing start signal for the performance detection controller 3, which is the key trigger component for response time detection. The valve closing device 2 connects the valve position lever 24 and the valve lever 12, so that the closed state of the cut-off valve 1 is directly converted into the displacement of the valve position lever 24, which in turn triggers the signal change of the travel switch 23, providing a precise timing end signal for the performance detection controller 3, ensuring the integrity of the response time calculation.

[0066] In the embodiments of the present application, on the one hand, the manual reading of the dynamic pressure gauge is replaced, avoiding manual reading deviation and achieving precise detection of high and low pressure cut-off pressures. On the other hand, the valve opening device 8 and the valve closing device 2 respectively collect precise signals of cut-off start and closing to position, and the performance detection controller 3 automatically calculates the response time, replacing manual stopwatch timing and eliminating the situation of human operation delay or judgment error, significantly improving the detection accuracy of the response time.

[0067] In the embodiments of the present application, the traditional pressure test and response time test are broken down and can be performed simultaneously, reducing the number of repeated tests and simplifying the detection process, significantly improving the detection efficiency and greatly shortening the overall detection time of a single cut-off valve 1.

[0068] Further, the trigger slope 251 is arranged on the trigger head 25 and matches the arc surface of the outer wall of the roller operating head in the travel switch 23.

[0069] Further, the inclined part 141 is arranged on the side of the guide surface 14 away from the push rod 84, and the inclined surface of the inclined part 141 is arranged in the direction opposite to the return direction of the switch rod 83.

[0070] Further, the anti-abrasion wheel 151 is arranged on the contact surface 15 and rotates, and the arc surface of the outer wall of the anti-abrasion wheel 151 matches the inclined surface of the inclined part 141.

[0071] In the embodiment, the arc of the trigger slope 251 matches the arc of the roller operating head of the travel switch 23, so that the surface contact is ensured when the two are in contact, and the force is uniform. The material of the trigger head 25 needs to have rigidity and toughness to avoid damage to the roller operating head of the travel switch 23 when the trigger head 25 is triggered. The edge of the inclined part 141 is chamfered to avoid scratching the anti-abrasion wheel 151. The anti-abrasion wheel 151 needs to have wear resistance and elasticity, and is installed on the rotating shaft of the contact surface 15 through a bearing to ensure flexible rotation.

[0072] As a preferred embodiment, after the test is completed, the gas cylinder 5 and the gas source valve are closed, then the pressure relief valve 6 is closed, and the manual reset cut-off valve 1 is reset to the open state, the valve rod 12 drives the valve position rod 24 to reset, and the travel switch 23 returns to the initial state. The switch rod 83 swings back (as shown by the arrow direction in the middle), the anti-abrasion wheel 151 on the contact surface 15 rolls along the inclined surface of the inclined part 141 on the guide surface 14 and generates a force (the anti-abrasion wheel 151 can effectively prevent the damage of the contact surface 15 to the guide surface 14 during each reset of the device), then pushes the push rod 84 to slide downward, the lower end of the push rod 84 is close to the micro switch 87 again, and the device returns to the initial state, and then the next test can be performed. Figure 3

[0073] It should be noted that after each test is completed, the gas source needs to be closed and the pressure of the entire device needs to be completely released through the pressure relief valve 6 to avoid residual high-pressure gas. The interface sealing of the pipeline group 9 needs to be checked regularly, and if leakage is found, the sealing gasket needs to be replaced in time. The sensing end of the micro switch 87 and the travel switch 23 needs to be cleaned regularly to avoid dust and oil affecting signal transmission. The pressure transmitter 7 and the performance detection controller 3 need to be calibrated regularly to ensure measurement accuracy. The moving parts of the valve opening device 8 and the valve closing device 2 need to be regularly smeared with lubricating oil, and special lubricating oil resistant to high temperature and aging is selected to prolong the service life of the parts.

[0074] ​In the specific implementation, when the high-pressure cut-off pressure and response time test of the cut-off valve 1 is performed: the cut-off valve 1 is opened to the open state and the pressure regulating valve 4 is adjusted, the overall device pressure is slowly increased until the high-pressure cut-off pressure is reached. When the detection component in the actuator 11 detects that the overall device pressure reaches the high-pressure cut-off pressure, it controls the locking device 111 to simultaneously perform two operations: control the swing of the switch rod 83 and release the valve rod 12 to close the cut-off valve 1. Finally, the high-pressure cut-off pressure and response time are displayed on the display screen installed thereon. At this point, the high-pressure cut-off pressure and response time test of the cut-off valve 1 is completed. When the low-pressure cut-off pressure and response time test of the cut-off valve 1 is performed: the cut-off valve 1 is opened to the open state and the pressure regulating valve 4 is adjusted, so that the overall device pressure is between the high-pressure cut-off pressure and the low-pressure cut-off pressure. Then the pressure relief valve 6 is opened, and the overall device pressure is slowly reduced until the low-pressure cut-off pressure is reached. When the detection component in the actuator 11 detects that the overall device pressure reaches the low-pressure cut-off pressure, it controls the locking device 111 to simultaneously perform two operations: control the swing of the switch rod 83 and release the valve rod 12 to close the cut-off valve 1. The subsequent specific operation is consistent with the operation when the high-pressure cut-off pressure and response time test of the cut-off valve 1 is performed, finally, the low-pressure cut-off pressure and response time are calculated and displayed on the display screen installed on the performance detection controller 3. At this point, the low-pressure cut-off pressure and response time test of the cut-off valve 1 is completed.

[0075] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A shutoff valve performance testing device, characterized by: The utility model relates to a kind of gas cylinder performance detection device, including: Cut-off valve (1), valve closing device (2), performance detection controller (3), pressure regulating valve (4), gas cylinder (5), pressure relief valve (6), pressure transmitter (7), valve opening device (8), pipeline group (9) and connecting line (10); Wherein, the top and side of the cut-off valve (1) are respectively provided with the valve closing device (2) and the gas cylinder (5), and the valve opening device (8) is installed on the control box of the cut-off valve (1). The gas cylinder (5), the pressure regulating valve (4), the pressure relief valve (6), the pressure transmitter (7) and the cut-off valve (1) are connected by the pipeline group (9), and the performance detection controller (3) is connected with the valve closing device (2), the valve opening device (8) and the pressure transmitter (7) through the connecting line (10). The valve opening device (8) comprises a first mounting seat (81), a gland (82), a switch rod (83), a push rod (84), a valve opening spring (85), a connecting sleeve (86), a microswitch (87) and a fixed block (88). Wherein, the first mounting seat (81) is arranged in the cut-off valve (1) through the fixed block (88), one end of the first mounting seat (81) is provided with the gland (82), and the other end is provided with the connecting sleeve (86), and the push rod (84) is slidably arranged in the first mounting seat (81). One end of the push rod (84) penetrates through the gland (82) and extends to the outside of the first mounting seat (81), and the other end penetrates through the first mounting seat (81) and extends to the inside of the connecting sleeve (86). The connecting sleeve (86) is provided with the microswitch (87), the switch rod (83) is rotatably connected in the cut-off valve (1), and the push rod (84) is provided with the valve opening spring (85) connected to the inside of the first mounting seat (81) on the outer wall.

2. The shutoff valve performance testing device of claim 1, wherein: One end of the push rod (84) away from the connecting sleeve (86) is provided with a guide surface (14), and one end of the switch rod (83) close to the push rod (84) is provided with a contact surface (15).

3. The shutoff valve performance testing device of claim 1, wherein: The pipeline group (9) comprises a main pipe (91) and a branch pipe (92). Wherein, the main pipe (91) is sequentially communicated with the gas cylinder (5), the pressure regulating valve (4), the pressure transmitter (7) and the cut-off valve (1), and the pressure relief valve (6) is communicated through the branch pipe (92) at the position between the pressure regulating valve (4) and the pressure transmitter (7) on the main pipe (91).

4. The shutoff valve performance testing device of claim 2, wherein: The cut-off valve (1) comprises an actuator (11), a valve rod (12) and a valve body (13). Wherein, the valve rod (12) is arranged in the actuator (11), the actuator (11) is provided with the valve body (13) at the bottom end, one end of the valve rod (12) away from the valve body (13) is connected with the valve closing device (2), and the actuator (11) is provided with a locking device (111). The first mounting seat (81) is arranged inside the actuator (11), and one end of the switch rod (83) away from the contact surface (15) is rotationally connected with the locking device (111).

5. The shutoff valve performance testing device of claim 4, wherein: The actuator (11) is provided with a detection component, and the valve body (13) is provided with a closing spring.

6. The shutoff valve performance testing device of claim 4, wherein: The valve device (2) comprises a second mounting seat (21), a switch frame (22), a travel switch (23), a valve position rod (24), a trigger head (25) and a guide sleeve (26). The second mounting seat (21) is arranged on the top plate of the cut-off valve (1), the switch frame (22) is arranged on the second mounting seat (21) through bolts, and the travel switch (23) is arranged on the switch frame (22). The guide sleeve (26) is arranged in the second mounting seat (21), the valve position rod (24) is slidably arranged in the guide sleeve (26), one end of the valve position rod (24) penetrates the top plate of the cut-off valve (1) and is connected with the valve rod (12), and the other end of the valve position rod (24) is provided with the trigger head (25).

7. The shutoff valve performance testing device of claim 6, wherein: The trigger head (25) is provided with a trigger inclined surface (251) matched with the outer wall arc surface of the roller operating head in the travel switch (23).

8. The shutoff valve performance testing device of claim 2, wherein: An inclined part (141) is arranged on one side of the guide surface (14) away from the push rod (84), and the inclined surface of the inclined part (141) is arranged in the direction opposite to the return swing direction of the switch rod (83).

9. The shutoff valve performance testing device of claim 8, wherein: The contact surface (15) is rotationally provided with an anti-wear wheel (151), and the outer wall arc surface of the anti-wear wheel (151) is matched with the inclined surface of the inclined part (141).

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