Pull-to-open valve safety detection system and method

Abstract

The application relates to a safety detection system and method for a pull-off valve, and the detection system comprises an internal pressure test subsystem and an external pull force test subsystem. The internal pressure test subsystem comprises an inflow branch, an outflow branch, a pressure stabilizing device and a pressure monitoring device. The inflow branch comprises a first joint and a pressurizing device in communication. The outflow branch comprises a second joint and a first stop valve in communication. The first joint and the second joint are used for one-to-one communication with two ends of the pull-off valve to be detected. The pressure stabilizing device is installed on a pipeline between the first joint and the pressurizing device. The pressure monitoring device is installed on the pipeline between the first joint and the pressurizing device. The external pull force test subsystem comprises a driving device and a pull force monitoring device. The driving device applies pull force to the pull-off valve to be detected. The pull force monitoring device is connected with the driving device. The monitoring data obtained by the application is more applicable to the general situation of the pull-off valve in use, the comprehensiveness of the detection data of the pull-off valve can be improved, and the safety hidden danger can be reduced.

Description

Technical Field

[0001] This application relates to the field of testing equipment technology, and in particular to a safety testing system and method for a breakaway valve. Background Technology

[0002] In recent years, breakaway valves have become an indispensable safety protection component in the field of refueling equipment. Installed in the output pipeline of the refueling machine, the breakaway valve forms a safe connection between the refueling nozzle and the refueling machine, and has a built-in two-way check valve. When the refueling nozzle is pulled by a certain external force, the breakaway valve will automatically disconnect, simultaneously closing and cutting off the pipeline to prevent the refueling machine's delivery pipe from being broken or the refueling machine from being pulled down, thus avoiding dangerous accidents.

[0003] Many existing breakaway valve products can meet the requirements of multiple breakages and reuse, and have many advantages such as being green, environmentally friendly, and economical. Therefore, they are widely used in hydrogen dispensers, gas dispensers, fuel dispensers, and other high, medium, and low pressure gas or liquid chemical raw material dispensing equipment in production and daily life. Thus, extremely high requirements are placed on the sealing performance, breakage effect, and quality assurance of the breakaway valve itself during use. However, existing breakaway valve testing devices, such as the testing device for a fuel nozzle breakaway valve with announcement number CN210154800U, and the breakaway valve testing device and testing method with publication number CN113432866A, can only detect the tensile force applied to the breakaway valve. This results in incomplete and inaccurate test results, thus posing safety hazards. Summary of the Invention

[0004] To improve the comprehensiveness of breakaway valve test data and reduce safety hazards, this application provides a breakaway valve safety testing system and testing method.

[0005] The safety testing system and method for a breakaway valve provided in this application adopt the following technical solution:

[0006] On one hand, this application relates to a safety detection system for a breakaway valve, comprising:

[0007] An internal pressure testing subsystem includes an inlet branch, an outlet branch, a pressure stabilizing device, and a pressure monitoring device. The inlet branch includes a first connector and a pressurizing device connected sequentially by a pipe. The outlet branch includes a second connector and a first shut-off valve connected sequentially by a pipe. The first and second connectors are used to connect to both ends of the breakaway valve under test to form a pressurizing path. The pressure stabilizing device is installed on the pipe between the first connector and the pressurizing device to stabilize the pressure inside the breakaway valve under test. The pressure monitoring device is installed on the pipe between the first connector and the pressurizing device to monitor the internal pressure on the breakaway valve under test.

[0008] An external tensile testing subsystem includes a driving device and a tensile monitoring device. The driving device drives the first connector and the second connector to move away from each other in order to apply tensile force to the break-through valve under test. The tensile monitoring device is connected to the driving device and is used to monitor the tensile force on the break-through valve under test.

[0009] By adopting the above technical solution, the maximum external tensile force that the break-through valve under test can withstand when it is not subjected to internal pressure can be detected by starting the drive device alone. Specifically, the drive device drives the first connector and the second connector away to apply tensile force to the break-through valve under test, and the tensile force is continuously increased. When the break-through valve is broken, the tensile force monitoring device can detect the tensile force on the break-through valve. This tensile force is the maximum external tensile force that the break-through valve under test can withstand when it is not subjected to internal pressure.

[0010] The pressurization device can be activated independently to detect the maximum internal pressure that the break-through valve under test can withstand when it is not subjected to external tension. Specifically, fluid is added to the pressurization passage, the first shut-off valve is closed, and the pressurization device is driven to continuously increase the pressure in the pipeline until the break-through valve under test breaks. When the break-through valve under test breaks, the pressure on the break-through valve under test is detected by the pressure monitoring device. This pressure is the maximum internal pressure that the break-through valve under test can withstand when no external tension is applied.

[0011] Simultaneous activation of the drive device and pressurization device can detect the situation where the break-through valve under test is subjected to both internal pressure and external tension. Specifically, the drive device is activated to apply tension to the break-through valve under test, and the applied tension is gradually increased. During each application of constant tension, the pressure stabilizing device is used to stabilize the pressure inside the break-through valve under test, and the pressure in the pipeline is continuously increased until the break-through valve under test breaks. When the break-through valve under test breaks, the pressure monitoring device is used to monitor the pressure on the break-through valve under test, that is, the maximum internal pressure that the break-through valve under test can withstand when the constant tension is applied.

[0012] Generally, during actual fluid injection, the breakaway valve is subjected to a certain internal pressure. When the injection gun is pulled by a certain external force, the breakaway valve is subjected to both internal pressure and external tension. Therefore, the monitoring data obtained by the detection device of this application is more applicable to the general situation of breakaway valve use, which can improve the comprehensiveness of breakaway valve detection data and reduce safety hazards.

[0013] Optionally, it also includes a limiting box, which is fixedly connected to the driving device. One of the first connector and the second connector is connected to the driving part of the driving device. The other end of the first connector and the second connector, away from the pull-out valve under test, is limited outside the limiting box. After the driving part of the driving device applies a pulling force to the pull-out valve under test and causes the pull-out valve to break, the side wall of the limiting box limits the pull-out valve under test to be contained inside the limiting box.

[0014] By adopting the above technical solution, the two ends of the breakable valve under test are connected to the first connector and the second connector to form a whole. One end of this whole is limited outside the limiting box. The driving device applies force to the other end of the whole. The limiting box can block the whole, making the first connector and the second connector move away from each other, thereby applying force to the breakable valve under test. When the breakable valve under test breaks, the side wall of the limiting box can limit the breakable valve under test inside the limiting box, which can prevent the breakable valve under test from falling and being damaged or lost. At the same time, if the breakable valve under test has poor sealing, the fluid will continue to flow out after the break. By setting the limiting box, the fluid can also be prevented from causing pollution.

[0015] Optionally, a cover is rotatably mounted on the limiting box.

[0016] By adopting the above technical solution, the valve to be tested can be further confined within the limit box, while avoiding fluid splashing and contamination.

[0017] Optionally, the two opposite side walls of the limiting box are provided with a first through groove with the opening facing upward, and the first connector and the second connector are located in the first through groove.

[0018] By adopting the above technical solution, after connecting the breakaway valve to be tested with the first connector and the second connector one by one, the first connector and the second connector can be directly placed in the first through groove, which facilitates the installation and disassembly of the breakaway valve to be tested.

[0019] Optionally, the first connector is located outside the limiting box at one end away from the break-off valve under test. The second connector is cylindrical with one end open and the other end sealed. The open end of the second connector is located inside the limiting box for communication with the break-off valve under test. The sealed end of the second connector is located outside the limiting box and is connected to the driving part of the driving device. A through hole is provided through the side wall of the second connector, and the through hole is connected to the first shut-off valve through a pipe.

[0020] By adopting the above technical solution, the second connector is connected to both the pipeline and the drive unit of the drive device. By connecting the breakaway valve to be tested to the second connector, internal pressure testing and external tensile testing can be achieved simultaneously. The limit box limits the first connector, and the drive unit of the drive device pulls the second connector, which can apply tensile force to both ends of the breakaway valve to be tested, avoiding direct contact between the drive unit of the drive device and the breakaway valve to be tested, and preventing damage to the breakaway valve to be tested.

[0021] Optionally, it also includes a guide assembly, which includes a slide rail and a slider. The drive device is fixedly connected to the slide rail, the slider is slidably mounted on the slide rail, the drive part of the drive device is fixedly connected to the slider, the slider is fixedly connected to the second connector, and the pressure monitoring device is installed between the slider and the second connector.

[0022] By adopting the above technical solution, the setting of the guide component can ensure the stability of the force applied to the valve under test, while ensuring the accuracy of the force monitoring device.

[0023] Optionally, the driving device is an electric push rod, and the telescopic rod of the electric push rod is the driving part.

[0024] By adopting the above technical solution, the telescopic rod of the electric push rod can be extended to apply external tension to the valve to be tested, which is convenient to install and has a simple structure.

[0025] Optionally, it also includes a test platform and a measuring cylinder. The limiting box is mounted on the test platform and suspended in the air. The bottom of the limiting box is funnel-shaped to form a material guiding part, and the measuring cylinder is located directly below the material guiding part.

[0026] By adopting the above technical solution, when the fluid introduced into the pressurization passage is oil, if the test break valve breaks and the sealing performance of the test break valve is not good, the oil will continue to flow out after the break. By setting the bottom of the limit box into a funnel shape, it is easy for the oil to flow into the measuring cylinder for recycling, while avoiding fluid contamination. At the same time, the degree of sealing of the test break valve can also be judged based on the amount and speed of oil recovery in the measuring cylinder.

[0027] Optionally, the test stand is hollow with a hollow top. The pressurizing device and measuring cylinder are located inside the test stand. The limiting box is installed in the hollow part of the test stand. The driving device and tensile monitoring device are installed on the test stand. A cover plate is provided on the side wall of the test stand opposite to the measuring cylinder, and an observation window is provided on the cover plate.

[0028] By adopting the above technical solution and installing each component on the test bench, the integration of the entire device can be improved. The limit box is located in the hollow part of the test bench, which facilitates the installation of the pull-off valve to be tested. A cover plate is set on the test bench to facilitate the removal of the measuring cylinder for oil recovery. An observation window is set on the cover plate to facilitate the monitoring of the amount and speed of oil recovery in the measuring cylinder.

[0029] Optionally, it also includes a display screen, wherein the pressure monitoring device includes a pressure sensor, the tension monitoring device includes a tension sensor, and both the pressure sensor and the tension sensor are connected to the display screen to display the internal pressure value and the external tension value of the valve under test; and / or,

[0030] By adopting the above technical solution, the internal pressure and external tension of the valve under test can be displayed in real time using a display screen, making the observation more intuitive.

[0031] Optionally, the pressure monitoring device includes a pressure gauge installed on the pipeline between the first connector and the drive pump to indicate the internal pressure value experienced by the breakaway valve under test; and / or,

[0032] By adopting the above technical solution, the internal pressure of the breakaway valve under test can be directly displayed using a pressure gauge; the pressure gauge and the pressure sensor can serve as backups for each other, and when the internal pressure values ​​monitored by the pressure gauge and the pressure sensor differ significantly, fault repair can be carried out in a timely manner, thereby improving the accuracy of monitoring.

[0033] Optionally, the pressurizing device is a drive pump, and the inlet branch includes a fluid storage tank, a drive pump, and a first connector connected in sequence through a pipeline, and the first shut-off valve is connected to the fluid storage tank through a pipeline.

[0034] By adopting the above technical solution, the drive pump can be started to allow fluid to flow from the fluid storage tank through the drive pump, the first connector, the test break valve, the second connector, the first shut-off valve, and then back to the fluid storage tank. By closing the first shut-off valve, the pressurization passage can be filled with fluid, which is convenient to operate.

[0035] Optionally, the pressure stabilizing device includes an overflow valve, which is installed on the pipeline between the drive pump and the pressure monitoring device and is connected to the fluid storage tank.

[0036] By adopting the above technical solution, the pressure in the pipeline can be adjusted by controlling the overflow valve, which is simple to control.

[0037] Secondly, this application also relates to a safety testing method for a breakaway valve, based on the breakaway valve safety testing device as described in any of the preceding claims, comprising the following steps:

[0038] S1: Connect the first connector, the second connector and the two ends of the breakaway valve to be tested to form a pressurization path;

[0039] S2: Activate the drive device, apply tension to the break-through valve under test, continuously increase the tension of the drive device on the break-through valve under test, and when the break-through valve under test breaks, use the tension monitoring device to test the tension on the break-through valve under test, that is, the maximum external tension that the break-through valve under test can withstand without internal pressure, and then stop the drive device.

[0040] S3: Install the break-off valve to be tested, turn on the pressurizing device, and close the first shut-off valve;

[0041] S4: Continuously increase the pressure in the pipeline until the test break valve breaks. When the test break valve breaks, use a pressure monitoring device to test the pressure on the test break valve, that is, the maximum internal pressure that the test break valve can withstand when no external force is applied.

[0042] S5: Activate the drive device and apply a pulling force to the break-off valve under test. Gradually increase the applied pulling force. When a constant pulling force is applied each time, use a pressure stabilizing device to stabilize the pressure inside the break-off valve under test. Continuously increase the pressure inside the pipeline until the break-off valve under test breaks. When the break-off valve under test breaks, use a pressure monitoring device to test the pressure on the break-off valve under test, that is, the maximum internal pressure that the break-off valve under test can withstand when the constant pulling force is applied.

[0043] By adopting the above technical solution, starting the drive device alone can detect the maximum external tensile force that the breakaway valve under test can withstand when it is not subjected to internal pressure; starting the pressurization device alone can detect the maximum internal pressure that the breakaway valve under test can withstand when it is not subjected to external tensile force; and starting the drive device and the drive pump simultaneously can detect the situation where the breakaway valve under test is subjected to both internal pressure and external tensile force. Generally, when fluid is added, the breakaway valve will be subjected to a certain internal pressure. When the injection gun is pulled by a certain external force, the breakaway valve will be subjected to both internal pressure and external tensile force. Therefore, the monitoring data obtained by the detection device of this application is more applicable to the general situation of breakaway valve use, which can improve the comprehensiveness of breakaway valve detection data and reduce safety hazards.

[0044] In summary, this application includes at least one of the following beneficial technical effects:

[0045] 1. Starting the drive unit alone can detect the maximum external tension that the break-through valve under test can withstand when it is not subjected to internal pressure. Starting the pressurization unit alone can detect the maximum internal pressure that the break-through valve under test can withstand when it is not subjected to external tension. Starting the drive unit and the drive pump at the same time can detect the situation where the break-through valve under test is subjected to both internal pressure and external tension.

[0046] 2. The monitoring data obtained by the detection system of this application is more applicable to the general situation of breakaway valve use, which can improve the comprehensiveness of breakaway valve detection data and reduce safety hazards.

[0047] 3. Install the break-through valve under test in the limit box. When the break-through valve under test breaks, it can prevent the break-through valve from falling and being damaged or lost. If the break-through valve under test has poor sealing, the fluid will continue to flow out after it breaks. By setting the limit box, the fluid can also be prevented from being contaminated. Attached Figure Description

[0048] Figure 1 This is a schematic diagram showing the connection between the internal pressure testing subsystem, the external tensile testing subsystem, and the break-through valve under test in an embodiment of this application.

[0049] Figure 2 This is a schematic diagram of the structure of the breakaway valve to be tested installed in the breakaway valve safety detection system in this application embodiment;

[0050] Figure 3This is a first-view structural diagram of the break-through valve under test installed in the break-through valve safety detection system (with the test bench and display screen partially hidden) in an embodiment of this application.

[0051] Figure 4 yes Figure 3 A magnified view of a portion of point A in the middle;

[0052] Figure 5 This is a schematic diagram of the structure of the break-through valve under test installed in the break-through valve safety detection system (with the test bench and display screen hidden) from a second perspective in an embodiment of this application.

[0053] Figure 6 yes Figure 5 A magnified view of a portion of point B in the middle;

[0054] Figure 7 This is a third-person view of the structure of the break-off valve under test installed in the break-off valve safety detection system (the test bench structure and display screen are hidden) in an embodiment of this application.

[0055] Explanation of reference numerals in the attached drawings: 100, Internal pressure testing subsystem; 200, External tensile force testing subsystem; 300, Test valve; 1, Pressure stabilizing device; 2, Pressure monitoring device; 2a, Pressure gauge; 2b, Pressure sensor; 3, First connector; 4, Pressurizing device; 5, Second connector; 6, First shut-off valve; 7, Fluid storage tank; 8, Filter; 9, Display screen; 10, Check valve; 11, Drive device; 12, Tensile force monitoring device; 13, Limiting box; 13a, First through slot; 13b, Material guide; 14, Box cover; 14a, Second through slot; 14b, Handle; 15, Test platform; 151, Support base; 15a, Cover plate; 15b, Observation window; 16, Measuring cylinder; 17, Slide rail; 18, Slider; 19, U-shaped protective plate; 20, Fixing plate. Detailed Implementation

[0056] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0057] This application discloses a safety detection system for a breakaway valve. (Refer to...) Figure 1 The breakaway valve safety testing system includes an internal pressure testing subsystem 100 and an external tensile force testing subsystem 200. The internal pressure testing subsystem 100 can be used to test the internal pressure borne by the breakaway valve 300 under test, and the external tensile force testing subsystem 200 can be used to test the external tensile force borne by the breakaway valve 300 under test.

[0058] The internal pressure testing subsystem 100 includes an inlet branch, an outlet branch, a pressure stabilizing device 1, and a pressure monitoring device 2. The inlet branch includes a first connector 3 and a pressurizing device 4 connected in sequence by a pipe. The outlet branch includes a second connector 5 and a first shut-off valve 6 connected in sequence by a pipe. The first connector 3 and the second connector 5 are used to connect to both ends of the breakaway valve 300 under test to form a pressurizing passage.

[0059] Fluid, which can be liquid or gas, is added to the pressurization passage. The first shut-off valve 6 is closed, and the pressurization device 4 is used to pressurize the pressurization passage to increase the internal pressure of the test break valve 300. The pipes connected to both sides of the test break valve 300 are used to simulate the pipes on both sides of the break valve during actual filling.

[0060] Understandably, when the fluid being injected is gas, the pressurizing device 4 can be, but is not limited to, an air pump or a one-way cylinder. The air pump can continuously inject air into the pressurizing passage, and since the first shut-off valve 6 is closed, the internal pressure of the test breakaway valve 300 can be continuously increased. To facilitate control of the first shut-off valve 6, the first shut-off valve 6 can be a solenoid valve. When the fluid is liquid, liquid can be injected into the pressurizing passage first. The pressurizing device 4 can be, but is not limited to, a one-way cylinder or an electric actuator. The telescopic rod end of the one-way cylinder or electric actuator blocks the pipe and moves within the pipe to increase the pressure within the pipe.

[0061] To facilitate the addition of fluid to the pressurization path, the pressurization device 4 is a drive pump, which is a gear pump. The inlet branch includes a fluid storage tank 7, the drive pump, and a first connector 3 connected in sequence via pipelines. The first shut-off valve 6 is connected to the fluid storage tank 7 via a pipeline. Starting the drive pump allows fluid to flow from the fluid storage tank 7 through the drive pump, the first connector 3, the test break valve 300, the second connector 5, and the first shut-off valve 6 before returning to the fluid storage tank 7. Closing the first shut-off valve 6 fills the pressurization path with fluid.

[0062] The fluid storage tank 7 can store liquids or gases. In this embodiment, to facilitate the simulation of the application of the breakaway valve on the fuel dispenser, the fluid added into the pipeline is oil, the driving pump is an oil pump, the fluid storage tank 7 is an oil tank, and filters 8 are connected to the pipelines on both sides of the oil tank.

[0063] The pressure stabilizing device 1 is installed on the pipeline between the first joint 3 and the pressurizing device 4 to stabilize the pressure inside the breakaway valve 300 under test after pressurization, so as to facilitate the testing of the breakaway valve 300 under a specific pressure.

[0064] In an optional embodiment, the pressure stabilizing device 1 can be a second shut-off valve, or it can be a solenoid valve. The second shut-off valve is installed on the pipeline between the pressurizing device 4 and the first connector 3. After the first shut-off valve 6 is closed, the pipeline can be pressurized. After the pressure is increased to the preset pressure, the second shut-off valve is closed, so that the pressure in the pipeline can be stabilized at the preset pressure.

[0065] In this embodiment, the pressure stabilizing device 1 is an overflow valve, which is located between the pressurizing device 4 and the first connector 3. After the first shut-off valve 6 is closed, the pipeline is pressurized. After the pressure is increased to the preset pressure, the overflow valve is opened, which can stabilize the pressure in the pipeline at the preset pressure and ensure safety.

[0066] The pressure monitoring device 2 is installed on the pipeline between the first connector 3 and the drive pump to monitor the internal pressure of the breakaway valve 300 under test.

[0067] In this embodiment, the pressure monitoring device 2 includes a pressure gauge 2a and a pressure sensor 2b. Both pressure gauge 2a and pressure sensor 2b are installed on the pipeline between the first connector 3 and the drive pump. Pressure gauge 2a can directly indicate the internal pressure value received by the disconnect valve 300 under test. Pressure sensor 2b is connected to the display screen 9, displaying the pressure detected by pressure sensor 2b on the display screen 9 for more intuitive observation. Pressure gauge 2a and pressure sensor 2b can serve as backups for each other. Furthermore, when the internal pressure values ​​monitored by pressure gauge 2a and pressure sensor 2b differ significantly, fault diagnosis can be performed promptly, improving the accuracy of monitoring.

[0068] In other alternative embodiments, the pressure detection device may be a pressure gauge 2a or a pressure sensor 2b.

[0069] A check valve 10 is also installed on the pipeline between the drive pump and the first connector 3. An overflow valve and a pressure monitoring device 2 are located between the check valve 10 and the first connector 3. The check valve 10 ensures that the fluid can only flow from the drive pump toward the pressure monitoring device 2 and the first connector 3, thus preventing fluid backflow and affecting pressure monitoring.

[0070] The external tensile testing subsystem 200 includes a drive unit 11 and a tensile monitoring device 12. The drive unit 11 drives the first connector 3 and the second connector 5 to move away from each other to apply a tensile force to the breakaway valve 300 under test. The tensile monitoring device 12 is connected to the drive unit 11 and is used to monitor the tensile force applied to the breakaway valve 300 under test. Specifically, the tensile monitoring device 12 includes a tensile sensor, which is connected to a display screen 9 to display the external tensile force detected by the tensile sensor on the display screen 9.

[0071] The drive device 11 can apply a reverse tension to the first connector 3 and the second connector 5 simultaneously. In this embodiment, the drive device 11 applies a tension to only one of them, which simplifies the detection operation.

[0072] Since the drive device 11 applies a pulling force to only one of the first connector 3 and the second connector 5, the other needs to be restricted. Therefore, a limiting box 13 is provided. The limiting box 13 and the drive device 11 are fixedly connected, so that the relative positions of the limiting box 13 and the drive device 11 are fixed. One of the first connector 3 and the second connector 5 is connected to the drive part of the drive device 11. The other end of the first connector 3 and the second connector 5, away from the test pull-off valve 300, is limited to outside the limiting box 13. After the drive part of the drive device 11 applies a pulling force to the test pull-off valve 300 and causes the test pull-off valve 300 to break, the side wall of the limiting box 13 can limit the test pull-off valve 300 to be contained inside the limiting box 13.

[0073] Reference Figure 2 The test breakable valve 300 is connected to the first connector 3 and the second connector 5 at both ends to form a whole. One end of this whole is confined outside the limiting box 13. The driving device 11 applies force to the other end of this whole, and the limiting box 13 can block the whole, causing the first connector 3 and the second connector 5 to move away from each other, thereby applying force to the test breakable valve 300. When the test breakable valve 300 breaks, the side wall of the limiting box 13 can confine the test breakable valve 300 inside the limiting box 13, which can prevent the test breakable valve 300 from falling and being damaged or lost. At the same time, if the test breakable valve 300 has poor sealing, fluid will continue to flow out after the break. By setting the limiting box 13, oil leakage and contamination can also be prevented.

[0074] Reference Figure 3 and Figure 4 The drive unit of the drive device 11 can be connected to either the first connector 3 or the second connector 5. In this embodiment, the drive unit of the drive device 11 is connected to the second connector 5, and the end of the first connector 3 away from the pull-off valve 300 under test is limited to the outside of the limiting box 13.

[0075] In an optional embodiment, the opposite side walls of the limiting box 13 may be provided with through holes. The first connector 3 and the second connector 5 are inserted into the through holes. The diameter of the end of the first connector 3 outside the limiting box 13 is larger than the diameter of the through hole, so that the first connector 3 interferes with the outer side wall of the limiting box 13, thereby limiting one end of the first connector 3 to be outside the limiting box 13. The diameter of the through hole corresponding to the second connector 5 is smaller than the diameter of the pull-off valve 300 to be tested, thereby limiting the pull-off valve 300 to be tested to be inside the limiting box 13.

[0076] In this embodiment, the two opposite side walls of the limiting box 13 are provided with a first through groove 13a with the opening facing upwards, and the first connector 3 and the second connector 5 are located in the first through groove 13a. After the pull-off valve 300 to be tested is connected to the first connector 3 and the second connector 5 one by one, the first connector 3 and the second connector 5 can be directly placed in the first through groove 13a, which facilitates the installation and disassembly of the pull-off valve 300 to be tested.

[0077] A cover 14 is rotatably mounted on the limiting box 13, which further confines the test breakaway valve 300 within the limiting box 13 and prevents oil splashing and contamination. A second through groove 14a is provided on the cover 14 opposite to the first through groove 13a. When the cover 14 is closed on the limiting box 13, the first through groove 13a and the second through groove 14a cooperate to form a through hole for the first connector 3 and the second connector 5 to pass through. A handle 14b is provided on the cover 14 to facilitate opening.

[0078] Furthermore, the second connector 5 is a cylindrical shape with one end open and the other end sealed. The open end of the second connector 5 is located inside the limiting box 13 and is used to communicate with the pull-off valve 300 to be tested. The sealed end of the second connector 5 is located outside the limiting box 13 and is connected to the driving part of the driving device 11. A connecting hole is provided through the side wall of the second connector 5, and the connecting hole is connected to the first shut-off valve 6 through a pipe.

[0079] The second connector 5 is connected to both the pipeline and the drive unit of the drive device 11. By connecting the pull-off valve 300 to be tested to the second connector 5, internal pressure testing and external tensile testing can be achieved simultaneously. The limit box 13 limits the first connector 3. The drive unit of the drive device 11 pulls the second connector 5, which applies tensile force to both ends of the pull-off valve 300 to be tested, thus preventing the drive unit of the drive device 11 from directly contacting the pull-off valve 300 to be tested and preventing damage to the pull-off valve 300 to be tested.

[0080] After the test break valve 300 is broken, the liquid inside the test break valve 300 flows to the limit box 13. In order to facilitate the observation of the outflowing liquid, the limit box 13 is installed on the test platform 15, so that the limit box 13 is suspended. The bottom of the limit box 13 is funnel-shaped to form a guide part 13b. A ball valve is provided on the guide part 13b. A measuring cylinder 16 is placed directly below the limit box 13.

[0081] Reference Figure 5 and Figure 6 When the test break valve 300 breaks, if the sealing performance of the test break valve 300 is not good, the oil will continue to flow out after the test break valve 300 breaks. By setting the bottom of the limit box 13 to a funnel shape, the oil can flow into the measuring cylinder 16 for recycling and reuse, while avoiding fluid contamination. At the same time, the degree of sealing performance of the test break valve 300 can also be judged based on the amount and speed of recycling in the measuring cylinder 16.

[0082] The test platform 15 can be columnar, box-shaped, or other shapes, as long as it can support the limiting box 13. In this embodiment, in order to improve the integration of the entire device, the test platform 15 is hollow with a hollowed-out top. The drive pump, fluid storage tank 7, and measuring cylinder 16 are located inside the test platform 15. A support base 151 is fixed inside the test platform 15, and the measuring cylinder 16 is fixed on the support base 151. The limiting box 13 is installed in the hollowed-out part of the test platform 15. The drive device 11 and the tensile monitoring device 12 are installed on the test platform 15. The display screen 9 is installed on the test platform 15. A cover plate 15a is movably connected to the side wall of the test platform 15 opposite to the measuring cylinder 16. An observation window 15b is provided on the cover plate 15a.

[0083] The drive unit 11 is located below the limit box 13 to avoid affecting the installation of the pull-off valve 300 under test. At the same time, it can reduce the size of the test bench 15 on the horizontal plane, thereby reducing the floor space occupied by the test bench 15.

[0084] Installing each component on the test bench 15 improves the integration of the entire device. The limit box 13 is located in the cutout of the test bench 15, which facilitates the installation of the pull-off valve 300 to be tested. A cover plate 15a is provided on the test bench 15 to facilitate the removal of the measuring cylinder 16 for oil recovery. An observation window 15b is provided on the cover plate 15a to facilitate the monitoring of the amount and speed of oil recovery in the measuring cylinder 16.

[0085] In an optional embodiment, the drive device 11 can be a one-way cylinder, a ball screw mechanism, etc. In this embodiment, the drive device 11 is an electric push rod, and the telescopic rod of the electric push rod is the drive unit. When the telescopic rod of the electric push rod extends, an external pulling force can be applied to one end of the test breakaway valve 300, which is convenient to install and has a simple structure. The drive device 11 is located below the limit box 13, which avoids affecting the installation of the test breakaway valve 300, and at the same time can reduce the size of the test platform 15 on the horizontal plane, thereby reducing the footprint of the test platform 15.

[0086] Reference Figure 6 and Figure 7 The test bench 15 is also equipped with a guide assembly, which includes a slide rail 17 and a slider 18. The slide rail 17 is mounted on the test bench 15, and the slider 18 is slidably mounted on the slide rail 17. The slider 18 is connected to the second connector 5. The pressure monitoring device 2 is installed between the slider 18 and the second connector 5. The drive device 11 is fixedly connected to the slide rail 17, and the drive part of the drive device 11 is fixedly connected to the slider 18. The guide assembly ensures the stability of the force applied to the test pull-off valve 300, while also ensuring the accuracy of the force monitoring by the tension monitoring device 12. (Refer to...) Figure 6The tensile monitoring device 12 is located above the guide assembly, and a U-shaped protective plate 19 is installed on the test bench 15, which is located between the tensile monitoring device 12 and the guide assembly. A fixing plate 20 is fixed to the end of the slide rail 17, and the first connector 3 is fixedly installed on the fixing plate 20. The fixing plate 20 and the limit box 13 are fixedly connected.

[0087] The detection method of the safety detection device for breakaway valves provided in this embodiment includes the following steps:

[0088] S1: Connect the first connector 3 and the second connector 5 to both ends of the breakaway valve 300 under test to form a pressurization path;

[0089] S2: Start the drive device 11 and apply a pulling force to the test break valve 300. Continuously increase the pulling force of the drive device 11 on the test break valve 300. When the test break valve 300 breaks, use the tension monitoring device 12 to monitor the tension on the test break valve 300, that is, the maximum external tension that the test break valve 300 can withstand when no internal pressure is applied, and stop the operation of the drive device 11.

[0090] S3: Install the break-off valve 300 to be tested, fill the pressurization passage with fluid, turn on the pressurization device 4, and close the first shut-off valve 6;

[0091] S4: Continuously increase the pressure in the pipeline until the test break valve 300 breaks. When the test break valve 300 breaks, use the pressure monitoring device 2 to monitor the pressure on the test break valve 300, that is, the maximum internal pressure that the test break valve 300 can withstand when no external pulling force is applied.

[0092] S5: Install the break-through valve 300 to be tested, turn on the drive device 11, apply a pulling force to the break-through valve 300 to be tested, and gradually increase the applied pulling force. When a constant pulling force is applied each time, the pressure stabilizing device 1 is used to stabilize the pressure inside the break-through valve 300 to be tested, and the pressure inside the pipeline is continuously increased until the break-through valve 300 to be tested breaks. When the break-through valve 300 to be tested breaks, the pressure monitoring device 2 is used to monitor the pressure on the break-through valve 300 to be tested, that is, the maximum internal pressure that the break-through valve 300 to be tested can withstand when the constant pulling force is applied.

[0093] The drive device 11 can be activated independently to detect the maximum external tensile force that the test break-off valve 300 can withstand when it is not subjected to internal pressure. Specifically, the drive device 11 drives the first connector 3 and the second connector 5 away to apply a tensile force to the test break-off valve 300. The tensile force is continuously increased. When the test break-off valve 300 is broken, the tensile force monitoring device 12 can detect the tensile force on the break-off valve. This tensile force is the maximum external tensile force that the test break-off valve 300 can withstand when it is not subjected to internal pressure.

[0094] The pressurization device 4 can be activated independently to detect the maximum internal pressure that the test break-off valve 300 can withstand when it is not subjected to external tension. Specifically, fluid is added to the pressurization passage, the first shut-off valve 6 is closed, and the pressurization device 4 is driven to continuously increase the pressure in the pipeline until the test break-off valve 300 breaks. When the test break-off valve 300 breaks, the pressure on the test break-off valve 300 is detected by the pressure monitoring device 2. This pressure is the maximum internal pressure that the test break-off valve 300 can withstand when no external tension is applied.

[0095] Simultaneous activation of the drive device 11 and the pressurizing device 4 can detect when the breakaway valve 300 under test is subjected to both internal pressure and external tension. Generally, during fluid injection, the breakaway valve 300 under test will be subjected to a certain internal pressure. When the injection gun is pulled by a certain external force, the breakaway valve will be subjected to both internal pressure and external tension. Therefore, the monitoring data obtained by the detection device of this application is more applicable to the general situation of breakaway valve use, which can improve the comprehensiveness of breakaway valve detection data and reduce safety hazards.

[0096] Before simultaneously starting the drive device 11 and the pressurizing device 4 for testing, the drive device 11 can be started separately to test the maximum external tension that the break-off valve 300 under test can withstand when it is not subjected to internal pressure. The pressurizing device 4 can be started separately to test the maximum internal pressure that the break-off valve 300 under test can withstand when it is not subjected to external tension. Knowing the maximum internal pressure and maximum external tension that the break-off valve 300 under test can withstand can provide a reference during the testing process when it is subjected to internal pressure and external tension at the same time, so as to avoid the external tension or internal pressure being too large, which would cause the break-off valve to be directly broken.

[0097] The processor is equipped with a program for processing tensile and compressive data. The processor is electrically connected to the tensile monitoring device 12 and the compressive monitoring device 2. After the tensile monitoring device 12 monitors the tensile force on the test break valve 300, it sends the tensile force data to the processor. The compressive monitoring device 2 monitors the compressive force on the test break valve 300 and sends the compressive force data to the processor. The processor processes the tensile and compressive force data to form the test data of the test break valve 300. The processor is electrically connected to the display screen 9, and the test data of the test break valve 300 is displayed on the display screen 9 for analysis.

[0098] In an optional embodiment, when performing a sealing test on the breakaway valve 300, after confirming that the breakaway valve has no leakage, the breakaway valve 300 is installed, the pressurization passage is filled with fluid, the pressurization device 4 is turned on, and the pressure in the pipeline is continuously increased to 525-535 kPa. The pressure is maintained for 60-65 seconds, and the leakage of the breakaway valve 300 is observed during the pressure application process.

[0099] When performing a pressure separation test on the breakaway valve 300, the pressurizing device 4 is turned on, and the pressure in the pipeline is continuously increased to 1.6-1.61 MPa. The pressure is maintained for 60-65 seconds, and the leakage of the breakaway valve 300 is observed during the pressure application process. To confirm that the shut-off valve on the input side of the separated breakaway valve 300 can withstand the specified applied pressure, fluid at 1.4-1.41 MPa is applied to the input side of the separated breakaway valve 300, and the pressure is maintained for 60-65 seconds. The leakage of the breakaway valve 300 is observed during the pressure application process.

[0100] When conducting an axial separation tensile test on the test breakaway valve 300, to confirm that the test breakaway valve 300 can operate under the force within the specified limit under the maximum working pressure condition, the test breakaway valve 300 is installed, and an internal pressure of (350±10) kPa is applied to the test breakaway valve 300. An axial tensile force is applied to the test breakaway valve 300 through the drive device 11. The axial tensile force starts from zero and increases at a rate of (200±40) N / s. The tensile force monitoring device 12 monitors the tensile force on the test breakaway valve 300 and records the tensile force when the test breakaway valve 300 operates. For reusable test breakaway valves 300, this test can be performed multiple times, for example, 10 times. When conducting an axial separation tensile test on oil gun breakaway valves and pump breakaway valves, an internal pressure of (350±10) kPa is applied in the above test, and the axial tensile force starts from zero and increases at a rate of (2000±400) N / s.

[0101] When conducting non-axial separation tensile force tests on oil gun breakaway valves and pump breakaway valves, in order to confirm that the breakaway valve 300 under test can operate under a specified limit force when a non-axial force is applied under the maximum working pressure, an internal pressure of (350±10) kPa is applied to the breakaway valve 300 under test, and a non-axial tensile force is applied to the breakaway valve 300 under test through the drive device 11. The non-axial tensile force should be at an angle of 30°-35° with the longitudinal axis, starting from zero and increasing at a rate of (200±40) N / s or (2000±400) N / s. The force when the breakaway valve 300 under test operates is recorded.

[0102] When performing an axial separation tensile test on the breakaway valve 300 under test, in order to confirm that the breakaway valve 300 under test can operate under the force within the specified limit under nominal, static, and pressurized conditions, an internal pressure of (30±10) kPa is applied to the breakaway valve 300 under test, and an axial tensile force is applied to the breakaway valve 300 under test through the drive device 11. The axial tensile force is applied from zero and increases at a rate of (200±40) N / s or (2000±400) N / s. The force when the breakaway valve 300 under test operates is recorded.

[0103] When conducting a liquid discharge test on the breakaway valve 300 under test, in order to confirm the limit value of liquid discharge when the breakaway valve 300 under test is activated, for oil gun breakaway valves without a downpipe valve, the discharge quantity through the oil gun (including the breakaway coupling half-connected to the oil gun) should be determined separately. The discharge quantity is obtained by subtracting the above discharge quantity from the total discharge quantity. Install the breakaway valve 300 under test and apply an internal pressure of (350±10) kPa to the breakaway valve 300 under test. Apply an axial tensile force to the breakaway valve 300 under test through the drive device 11. The axial tensile force starts from zero and is pressurized at a rate of (200±40) N / s to activate the breakaway valve 300 under test. Collect the liquid discharged from both sides of the breakaway valve 300 under test using the measuring cylinder 16, and measure and record the volume of the discharged liquid.

[0104] When performing a reconnection test on the breakaway valve 300 under test, to confirm that the discharged liquid is within the limit range when the activated breakaway valve 300 is reconnected, or when attempting to reconnect it at the maximum operating pressure. For oil gun breakaway valves, the liquid in the oil gun must be completely drained. Apply an internal pressure of (350±10) kPa to the upper valve body (liquid inlet end) of the activated breakaway valve 300 under test, place the two parts of the activated breakaway valve 300 under test together, and attempt to reconnect them. Observe what happens during the reconnection attempt. Any discharged liquid should be measured and the results recorded.

[0105] When performing a reconnection test on the breakaway valve 300 under test, to confirm that the leakage of liquid is within the specified limits when the activated breakaway valve 300 is reconnected or attempted to be reconnected under nominal, static, and pressurized conditions, the liquid in the oil gun must be completely drained. Apply an internal pressure of (30±10) kPa to the upper valve body of the activated breakaway valve 300, place the two parts of the activated breakaway valve 300 together, and attempt to reconnect them. Observe what happens during the reconnection attempt; any discharged liquid should be measured and the results recorded.

[0106] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A safety detection system for a breakaway valve, characterized in that, include: An internal pressure testing subsystem (100) includes an inlet branch, an outlet branch, a pressure stabilizing device (1), and a pressure monitoring device (2). The inlet branch includes a first connector (3) and a pressurizing device (4) connected sequentially by a pipe. The outlet branch includes a second connector (5) and a first shut-off valve (6) connected sequentially by a pipe. The first connector (3) and the second connector (5) are used to connect to both ends of the breakaway valve (300) under test to form a pressurizing path. The pressure stabilizing device (1) is installed on the pipe between the first connector (3) and the pressurizing device (4) to stabilize the pressure inside the breakaway valve (300) under test. The pressure monitoring device (2) is installed on the pipe between the first connector (3) and the pressurizing device (4) to monitor the internal pressure on the breakaway valve (300) under test. The external tensile testing subsystem (200) includes a drive device (11) and a tensile monitoring device (12). The drive device (11) drives the first connector (3) and the second connector (5) to move away from each other in order to apply tensile force to the pull-off valve (300) under test. The tensile monitoring device (12) is connected to the drive device (11) and is used to monitor the tensile force on the pull-off valve (300) under test.

2. The safety detection system for a breakaway valve according to claim 1, characterized in that, It also includes a limiting box (13), which is fixedly connected to the driving device (11). One of the first connector (3) and the second connector (5) is connected to the driving part of the driving device (11). The other end of the first connector (3) and the second connector (5) away from the pull-off valve (300) to be tested is limited outside the limiting box (13). After the driving part of the driving device (11) applies a pulling force to the pull-off valve (300) to be tested and causes the pull-off valve (300) to break, the side wall of the limiting box (13) limits the pull-off valve (300) to be tested to be inside the limiting box (13).

3. The safety detection system for a breakaway valve according to claim 2, characterized in that, A cover (14) is rotatably mounted on the limiting box (13); and / or, The limiting box (13) has a first through groove (13a) with the slot opening facing upward on both sides of its opposite side walls. The first connector (3) and the second connector (5) are located in the first through groove (13a).

4. The safety detection system for a breakaway valve according to claim 2, characterized in that, The first connector (3) is located outside the limit box (13) at one end away from the pull-off valve (300) to be tested. The second connector (5) is cylindrical with one end open and the other end sealed. The open end of the second connector (5) is located inside the limit box (13) and is used to communicate with the pull-off valve (300) to be tested. The sealed end of the second connector (5) is located outside the limit box (13) and is connected to the drive part of the drive device (11). The side wall of the second connector (5) is provided with a through hole, and the through hole is connected to the first shut-off valve (6) through a pipe.

5. The safety detection system for a breakaway valve according to claim 4, characterized in that, It also includes a guide assembly comprising a slide rail (17) and a slider (18), wherein the drive device (11) is fixedly connected to the slide rail (17), the slider (18) is slidably mounted on the slide rail (17), the drive unit of the drive device (11) is fixedly connected to the slider (18), the slider (18) is fixedly connected to the second connector (5), and the pressure monitoring device (2) is installed between the slider (18) and the second connector (5); and / or, The driving device (11) is an electric push rod, and the telescopic rod of the electric push rod is the driving part.

6. The safety detection system for a breakaway valve according to claim 2, characterized in that, It also includes a test bench (15) and a measuring cylinder (16). The limiting box (13) is installed on the test bench (15) and suspended in the air. The bottom of the limiting box (13) is funnel-shaped to form a material guide (13b). The measuring cylinder (16) is located directly below the material guide (13b).

7. The safety detection system for a breakaway valve according to claim 6, characterized in that, The test platform (15) is hollow and has a hollow top. The pressurizing device (4) and the measuring cylinder (16) are located inside the test platform (15). The limiting box (13) is installed in the hollow part of the test platform (15). The driving device (11) and the tensile monitoring device (12) are installed on the test platform (15). The side wall of the test platform (15) is provided with a cover plate (15a) that is movably connected to the measuring cylinder (16). The cover plate (15a) is provided with an observation window (15b).

8. The safety detection system for a breakaway valve according to any one of claims 1 to 7, characterized in that, It also includes a display screen (9), the pressure monitoring device (2) includes a pressure sensor (2b), the tension monitoring device (12) includes a tension sensor, and both the pressure sensor (2b) and the tension sensor are connected to the display screen (9) to display the internal pressure value and the external tension value of the pull-off valve (300) under test; and / or, The pressure monitoring device (2) includes a pressure gauge (2a) installed on the pipeline between the first connector (3) and the pressurizing device (4) to indicate the internal pressure value of the pull-off valve (300) under test.

9. The safety detection system for a breakaway valve according to any one of claims 1 to 7, characterized in that, The pressurizing device (4) is a drive pump, and the inlet branch includes a fluid storage tank (7), a drive pump, and a first connector (3) connected in sequence by a pipeline. The first shut-off valve (6) is connected to the fluid storage tank (7) by a pipeline; and / or, The pressure stabilizing device (1) includes an overflow valve, which is installed on the pipeline between the drive pump and the pressure monitoring device (2) and is connected to the fluid storage tank (7).

10. A method for safety testing of a breakaway valve, characterized in that, Based on the safety detection device for a breakaway valve as described in any one of claims 1 to 9, the device includes the following steps: S1: Connect the first connector (3), the second connector (5) to both ends of the breakaway valve (300) to form a pressurization path; S2: Turn on the drive device (11) and apply a pulling force to the pull-off valve (300) under test. Continuously increase the pulling force of the drive device (11) on the pull-off valve (300) under test. When the pull-off valve (300) under test breaks, use the tension monitoring device (12) to test the tension on the pull-off valve (300) under test, that is, the maximum external tension that the pull-off valve (300) under test can withstand when no internal pressure is applied, and stop the drive device. S3: Install the break-off valve to be tested (300), turn on the pressurizing device (4), and close the first shut-off valve (6); S4: Continuously increase the pressure in the pipeline until the test break valve (300) breaks. When the test break valve (300) breaks, use the pressure monitoring device (2) to test the pressure on the test break valve (300), that is, the maximum internal pressure that the test break valve (300) can withstand when no external force is applied. S5: Turn on the drive device (11) and apply a pulling force to the break-off valve (300) under test. Gradually increase the applied pulling force. When a constant pulling force is applied each time, use the pressure stabilizing device (1) to stabilize the pressure inside the break-off valve (300) under test and continuously increase the pressure inside the pipeline until the break-off valve (300) under test breaks. When the break-off valve (300) under test breaks, use the pressure monitoring device (2) to test the pressure on the break-off valve (300) under test, that is, the maximum internal pressure that the break-off valve (300) under test can withstand when the constant pulling force is applied.

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