Valve testing device

Abstract

The utility model relates to valve detection technical field, specifically disclose a valve detection device can be connected with the valve to be measured through the export end, when carrying out the pressure, open the pressure -charging valve and bypass valve, and start the booster pump to make the pressurized liquid act on the valve to be measured, when carrying out the leakage amount detection, close the pressure -charging valve and bypass valve, open the detection control valve, and then can directly by the pressure -charging state enters the pressure -holding detection state, need not to carry out the dismounting operation to the valve detection device, compared with prior art, can improve the detection efficiency and detection accuracy. At the same time, the liquid storage tank, booster pump, detection pipeline, pressure regulating pipeline, first pressure regulating valve, pressure -charging valve, detection control valve, bypass valve, flow detection piece and first pressure detection piece are integrated in the machine body, need not to carry out the dismounting operation frequently with the valve to be measured, and it is convenient to move, can save manpower and material resources greatly, and improve the detection efficiency and detection accuracy.

Description

Technical Field

[0001] This utility model relates to the field of valve testing technology, and in particular to a valve testing device. Background Technology

[0002] There is a problem of internal leakage in valves during the startup of nuclear power plant units. In severe cases, it can even affect the switching of unit modes. Therefore, it is necessary to pressure test the leaking valves and monitor the leakage online.

[0003] In related technologies, pressure testing devices and leakage detection systems are usually set up independently. That is, the valve with leakage needs to be pressure tested by the pressure testing device first, and then the leakage detection system needs to monitor the leakage of the valve online. This detection method requires frequent replacement of connecting parts and ensures the interface compatibility between the pressure testing device and the leakage detection system, which leads to low detection efficiency and insufficient detection accuracy, making it difficult to meet user needs. Utility Model Content

[0004] The purpose of this invention is to provide a valve testing device that can improve valve testing efficiency and accuracy.

[0005] A valve detection device includes a body and a component disposed on the body:

[0006] The storage tank is used to store the test liquid;

[0007] A booster pump and a detection pipeline are provided, wherein the inlet of the booster pump is connected to the liquid storage tank; the detection pipeline includes an inlet end and an outlet end, wherein the inlet end is connected to the outlet end of the booster pump.

[0008] A pressure regulating pipeline, the two ends of which are respectively connected to the liquid storage tank and the outlet of the booster pump;

[0009] A first pressure regulating valve is located in the pressure regulating pipeline;

[0010] A pressurization valve is installed in the detection pipeline and located between the booster pump and the outlet end;

[0011] A detection control valve is provided in the detection pipeline and located between the pressurization valve and the outlet end;

[0012] A bypass valve is connected in parallel with the detection and control valve;

[0013] A flow detection element for detecting the flow rate of the detection liquid discharged from the detection control valve, and / or a first pressure detection element for detecting the pressure of the detection liquid entering the detection control valve and the bypass valve.

[0014] As an optional solution for the valve testing device, the valve testing device further includes a first extension tube body, which includes a first end and a second end. The first end is connected to the outlet end, and the second end is used to connect to the valve to be tested.

[0015] As an optional solution for the valve testing device, the valve testing device further includes:

[0016] The exhaust pipe includes a third end and a fourth end, wherein the third end is connected to the liquid storage tank and the fourth end is connected to the second end;

[0017] The second pressure regulating valve is located in the exhaust pipe.

[0018] As an alternative to the valve testing device, the valve testing device further includes a second extension tube, and the fourth end is connected to the second end through the second extension tube.

[0019] As an optional embodiment of the valve detection device, the machine body is provided with a receiving space, within which the liquid storage tank, the booster pump, the detection pipeline, the pressure regulating pipeline, and the exhaust pipeline are all located; and / or,

[0020] An operation panel is provided on one side of the machine body, and the operation switches for the first pressure regulating valve, the pressurizing valve, the detection control valve, and the bypass valve are all located on the operation panel; and / or,

[0021] The outlet end is provided with a detection interface; the fourth end is provided with an exhaust interface; an interface panel is provided on one side of the machine body, and both the detection interface and the exhaust interface are located on the interface panel; and / or,

[0022] The flow detection device includes a flow display; the first pressure detection device includes a first pressure display; the body includes a monitoring panel, and the flow display and the first pressure display are both disposed on the monitoring panel.

[0023] As an optional solution for the valve detection device, the interface panel and the operation panel are respectively located on two adjacent sides of the body; and / or,

[0024] The monitoring panel and the operation panel are located on the same side of the machine body.

[0025] As an optional embodiment of the valve testing device, the valve testing device further includes a second pressure sensing element, which is used to detect the pressure of the test liquid discharged from the pressurizing valve; and / or,

[0026] The valve detection device further includes a third pressure detection element, which is used to detect the pressure of the detection liquid at the outlet end.

[0027] As an optional solution for valve testing devices, the bottom of the machine body is equipped with casters.

[0028] As an optional solution for the valve detection device, the valve detection device also includes a gas storage tank for storing pressurized gas. The gas storage tank is connected to the detection pipeline, and the detection control valve and the bypass valve are both located between the gas storage tank and the outlet end.

[0029] As an optional embodiment of the valve testing device, the valve testing device further includes an inflation port located on one side of the machine body, the inflation port being connected to the air storage tank; and / or,

[0030] The valve detection device also includes a liquid replenishment interface located on one side of the machine body, which is connected to the liquid storage tank.

[0031] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0032] This utility model discloses a valve testing device that can be connected to the valve under test via its outlet end. During pressurization, the pressurizing valve and bypass valve are opened, and the booster pump is started to apply pressurized liquid to the valve. During leakage detection, the pressurizing valve and bypass valve are closed, and the detection control valve is opened, allowing direct transition from pressurization to pressure holding detection without disassembly. Compared to existing technologies, this improves testing efficiency and accuracy. Furthermore, the liquid storage tank, booster pump, detection pipeline, pressure regulating pipeline, first pressure regulating valve, pressurizing valve, detection control valve, bypass valve, flow detection element, and first pressure detection element are all integrated into the main body, eliminating the need for frequent disassembly and reassembly of the valve under test. This also facilitates mobility, significantly saving manpower and resources while improving testing efficiency and accuracy. Attached Figure Description

[0033] Figure 1 This is a first structural schematic diagram of the valve detection device in an embodiment of the present utility model;

[0034] Figure 2 This is a schematic diagram of the valve detection device in an embodiment of this utility model;

[0035] Figure 3 This is a schematic diagram of the second structure of the valve detection device in an embodiment of this utility model;

[0036] Figure 4 This is a schematic diagram of the third structure of the valve detection device in this embodiment of the present invention.

[0037] In the picture:

[0038] 100. Valve under test; 1. Body; 101. Casters; 102. Control panel; 103. Interface panel; 104. Monitoring panel; 2. Liquid storage tank; 201. Level gauge; 3. Booster pump; 4. Detection pipeline; 401. Detection interface; 5. Pressure regulating pipeline; 6. First pressure regulating valve; 7. Pressurizing valve; 8. Detection control valve; 9. Bypass valve; 10. Flow detection device; 1001. Flow display; 11. First pressure detection device; 1101. First pressure display; 12. Exhaust pipeline; 1201. Exhaust interface; 13. Second pressure regulating valve; 14. Second pressure detection device; 1401. Second pressure display; 15. Third pressure detection device; 1501. Third pressure display; 16. Liquid replenishment interface; 17. Gas storage tank; 18. Gas filling interface; 19. Gas filling valve; 20. Touch screen. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0040] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0041] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0042] In the description of this utility model, it should be noted that the terms "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are used only for the convenience of describing this utility model and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0046] like Figures 1 to 4As shown, this embodiment provides a valve detection device, including a body 1, and a liquid storage tank 2, a booster pump 3, a detection pipeline 4, a pressure regulating pipeline 5, a first pressure regulating valve 6, a pressurizing valve 7, a detection control valve 8, a bypass valve 9, a flow detection element 10, and a first pressure detection element 11 disposed on the body 1. The liquid storage tank 2 is used to store the detection liquid; the inlet of the booster pump 3 is connected to the liquid storage tank 2; the detection pipeline 4 includes an inlet end and an outlet end, the inlet end being connected to the outlet of the booster pump 3; the two ends of the pressure regulating pipeline 5... The system is connected to the outlets of the liquid storage tank 2 and the booster pump 3, respectively; the first pressure regulating valve 6 is located in the pressure regulating pipeline 5; the pressurizing valve 7 is located in the detection pipeline 4 and between the booster pump 3 and the outlet end; the detection control valve 8 is located in the detection pipeline 4 and between the pressurizing valve 7 and the outlet end; the bypass valve 9 is connected in parallel with the detection control valve 8; the flow detection element 10 is used to detect the flow rate of the detection liquid discharged from the detection control valve 8; and the first pressure detection element 11 is used to detect the pressure of the detection liquid entering the detection control valve 8 and the bypass valve 9.

[0047] The valve detection device of this embodiment can be connected to the valve 100 to be tested through the outlet end. When pressurizing, the pressurizing valve 7 and the bypass valve 9 are opened, and the booster pump 3 is started so that the pressurized liquid acts on the valve 100 to be tested. When detecting leakage, the pressurizing valve 7 and the bypass valve 9 are closed, and the detection control valve 8 is opened. Then, it can directly enter the pressure holding detection state from the pressurizing state without disassembling the valve detection device. Compared with the prior art, it can improve the detection efficiency and detection accuracy.

[0048] Meanwhile, the valve detection device of this embodiment integrates the liquid storage tank 2, booster pump 3, detection pipeline 4, pressure regulating pipeline 5, first pressure regulating valve 6, pressurizing valve 7, detection control valve 8, bypass valve 9, flow detection element 10 and first pressure detection element 11 into the body 1. It eliminates the need for frequent disassembly and assembly operations with the valve 100 to be tested, and is easy to move, which can greatly save manpower and material resources, and improve detection efficiency and detection accuracy.

[0049] In other embodiments, the first pressure detection element 11 may not be provided; that is, the sealing performance of the valve 100 under test is determined by the pressure measured by the flow detection element 10. Alternatively, the flow detection element 10 may not be provided; that is, the sealing performance of the valve 100 under test is determined by the pressure measured by the first pressure detection element 11.

[0050] For example, the flow rate of the booster pump 3 is not less than 8 ml / min; the pressure that the booster pump 3 can establish and maintain is not less than 1.6 MPa.

[0051] Specifically, the flow detection element 10 is located between the detection control valve 8 and the outlet end. Further, the first pressure detection element 11 is located between the detection control valve 8 and the pressurization valve 7, and the first pressure detection element 11 is located between the bypass valve 9 and the pressurization valve 7.

[0052] In some embodiments, the valve testing device further includes a first extension tube, which has a first end and a second end. The first end is connected to the outlet end, and the second end is used to connect to the valve 100 to be tested. When the valve testing device cannot be brought close to the valve 100 to be tested, the outlet end can be connected to the valve 100 to be tested through the first extension tube, which helps to improve the versatility and ease of use of the valve testing device.

[0053] In some embodiments, multiple first extension tubes are provided, and different first extension tubes have different types of test connectors at their second ends. This allows for matching with different types of valves 100 under test using different first extension tubes, improving the versatility of the valve testing device. For example, the test connector can be connected to the valve 100 under test via threaded connection, clamp connection, or flange connection, etc.

[0054] In some embodiments, the valve detection device further includes an exhaust pipe 12 and a second pressure regulating valve 13. The exhaust pipe 12 includes a third end and a fourth end, with the third end connected to the liquid storage tank 2 and the fourth end connected to the second end. The second pressure regulating valve 13 is located on the exhaust pipe 12. Therefore, during pressurization, excess detection liquid and gas in the detection liquid can be returned to the liquid storage tank 2 through the exhaust pipe 12. This not only allows for the adjustment and control of the detection liquid pressure in the detection pipe 4 via the second pressure regulating valve 13, but also helps to improve detection accuracy.

[0055] In other words, the valve detection device can simultaneously release pressure through the exhaust pipe 12 and the pressure regulating pipe 5, thereby making the pressure release response time less than 50ms and thus ensuring higher safety.

[0056] In some embodiments, the valve detection device further includes a second extension tube, with the fourth end connected to the second end via the second extension tube. Therefore, during pressure testing, excess detection liquid and gas in the detection liquid within the first extension tube can be returned to the storage tank 2 via the second extension tube, ensuring that the detection liquid introduced into the valve body to be tested is free of gas, which helps to further improve detection accuracy.

[0057] In some embodiments, the valve detection device further includes a second pressure detection element 14, which is used to detect the pressure of the detection liquid discharged from the pressurizing valve 7. Specifically, the second pressure detection element 14 is disposed in the detection pipeline 4 and located at the outlet of the pressurizing valve 7. This enables monitoring of the pressure of the detection liquid before it enters the detection control valve 8 and the bypass valve 9, which is beneficial for monitoring the operating status of the valve detection device. For example, in the event of a leak or other malfunction in the valve detection device, it is easier to locate the leak point in a timely manner.

[0058] In some embodiments, the valve detection device further includes a third pressure detection element 15, which is used to detect the pressure of the detection liquid at the outlet end. Specifically, the third pressure detection element 15 is disposed in the detection pipeline 4 and located at the outlet end. This allows for monitoring of the pressure of the detection liquid at the outlet end, and the pressure of the detection liquid at the outlet end can be adjusted by regulating control parameters such as the power of the booster pump 3, thereby ensuring that the pressure of the detection liquid provided by the valve detection device is more accurate and improving detection precision.

[0059] In some embodiments, the valve detection device further includes a liquid replenishment port 16 located on one side of the body 1, which is connected to the liquid storage tank 2. This facilitates the replenishment of detection liquid into the liquid storage tank 2 through the liquid replenishment port 16, thereby improving the operational convenience and detection efficiency of the valve detection device.

[0060] In some embodiments, the liquid storage tank 2 is equipped with a level gauge 201, which facilitates the quick determination of the liquid level in the liquid storage tank 2 and improves the convenience of replenishing liquid.

[0061] In some embodiments, the valve testing device further includes a gas storage tank 17 for storing pressurized gas. The gas storage tank 17 is connected to the testing pipeline 4, and both the testing control valve 8 and the bypass valve 9 are located between the gas storage tank 17 and the outlet end. Furthermore, pressurized gas can be supplied through the gas storage tank 17 to replace the testing liquid for testing the valve 100 under test, further improving the versatility of the valve testing device.

[0062] Specifically, the first pressure detection element 11 is located between the detection control valve 8 and the gas storage tank 17, and also between the bypass valve 9 and the gas storage tank 17. Therefore, the pressure of the detection liquid discharged from the pressurization valve 7, the detection liquid flowing into the detection control valve 8, and the detection liquid flowing into the bypass valve 9, as well as the gas pressure discharged from the gas storage tank 17, can be detected through the first pressure detection element 11. This reduces the number of first pressure detection elements 11 required, thus lowering costs.

[0063] In some embodiments, the valve detection device further includes an inflation port 18 located on one side of the body 1, which is connected to the gas storage tank 17. This facilitates the replenishment of pressurized gas into the gas storage tank 17 through the inflation port 18, thereby improving the operational convenience and detection efficiency of the valve detection device.

[0064] Furthermore, an inflation valve 19 is provided between the inflation port 18 and the air tank 17. This allows the inflation port 18 to be connected to or disconnected from the air tank 17, thereby improving the safety and convenience of the inflation operation.

[0065] In some embodiments, the bottom of the body 1 is provided with casters 101. This improves the ease of movement of the valve detection device and helps to improve detection efficiency. For example, four casters 101 are provided, respectively located at the four corners of the body 1, thereby improving the stability and ease of movement of the body 1.

[0066] In some embodiments, the body 1 has a receiving space, within which the liquid storage tank 2, booster pump 3, detection pipeline 4, pressure regulating pipeline 5, and exhaust pipeline 12 are all located. Furthermore, the exhaust pipeline 12 is located within the receiving space. That is, the first pressure regulating valve 6, charging valve 7, detection control valve 8, bypass valve 9, flow detection element 10, first pressure detection element 11, second pressure detection element 14, third pressure detection element 15, and second pressure regulating valve 13 are also located within the receiving space. This improves the aesthetics of the valve detection device and also provides protection for the liquid storage tank 2, booster pump 3, detection pipeline 4, pressure regulating pipeline 5, exhaust pipeline 12, first pressure regulating valve 6, charging valve 7, detection control valve 8, bypass valve 9, flow detection element 10, first pressure detection element 11, second pressure detection element 14, third pressure detection element 15, exhaust pipeline 12, and second pressure regulating valve 13 through the body 1, thereby improving the reliability of the valve detection device and extending its service life.

[0067] In some embodiments, an operation panel 102 is provided on one side of the body 1, and the operation switches for the first pressure regulating valve 6, the pressurizing valve 7, the detection control valve 8, and the bypass valve 9 are all located on the operation panel 102. Further, the operation switch for the second pressure regulating valve 13 is located on the operation panel 102. Further, the operation switch for the inflation valve 19 is located on the operation panel 102. This allows the operation switches for the first pressure regulating valve 6, the pressurizing valve 7, the detection control valve 8, the bypass valve 9, the second pressure regulating valve 13, and the inflation valve 19 to be centrally located, improving the ease of operation and assembly of the valve detection device.

[0068] Specifically, a detection interface 401 is provided at the outlet end. The detection pipeline 4 is connected to the first extension pipe body through the detection interface 401, which is convenient to operate, has better sealing, and can improve detection efficiency and accuracy.

[0069] Furthermore, the fourth end is provided with an exhaust port 1201. The exhaust pipe 12 is connected to the second extension pipe through the exhaust port 1201, which is convenient to operate and has better sealing performance, thereby improving detection efficiency and detection accuracy.

[0070] In some embodiments, an interface panel 103 is provided on one side of the body 1, and both the detection interface 401 and the exhaust interface 1201 are located on the interface panel 103. Further, a liquid replenishment interface 16 is located on the interface panel 103. Further, an air filling interface 18 is located on the interface panel 103. This allows the outlet end, the fourth end, the liquid replenishment interface 16, and the air filling interface 18 to be centrally located, improving the ease of operation and assembly of the valve detection device.

[0071] In some embodiments, the flow detection element 10 includes a flow display 1001. Further, the first pressure detection element 11 includes a first pressure display 1101. Further, the second pressure detection element 14 includes a second pressure display 1401. Further, the third pressure detection element 15 includes a third pressure display 1501. Further, the body 1 includes a monitoring panel 104, with the flow display 1001 and the first pressure display 1101 both disposed on the monitoring panel 104. Further, the second pressure display 1401 and the third pressure display 1501 are both disposed on the monitoring panel 104. This allows the flow display 1001, the first pressure display 1101, the second pressure display 1401, and the third pressure display 1501 to be centrally located, improving the ease of use and assembly of the valve detection device.

[0072] For example, the flow detection element 10 is a high-precision flow sensor (with display function). For instance, the accuracy of the high-precision flow sensor is ±0.1%FS (i.e., full scale). This can improve the detection accuracy.

[0073] For example, the first pressure sensing element 11 is a high-frequency pressure sensor (with display function). For instance, the sampling frequency of the high-pressure sensor is 1 kHz; the measurement range of the high-pressure sensor is 0 to 2.5 MPa. This can further improve the detection accuracy.

[0074] It should be noted that the valve detection device in this embodiment can identify minute leaks of no more than 0.1 ml / min, thus improving detection accuracy.

[0075] For example, the second pressure sensing element 14 is a first pressure gauge. The third pressure sensing element 15 is a second pressure gauge.

[0076] In some embodiments, the interface panel 103 and the operation panel 102 are located on adjacent sides of the body 1, thereby improving the convenience for operators to operate the operation switches of the first pressure regulating valve 6, the pressure charging valve 7, the detection control valve 8, the bypass valve 9, the second pressure regulating valve 13, and the air charging valve 19 after the valve detection device is connected to the valve to be tested 100.

[0077] In some embodiments, the monitoring panel 104 and the operation panel 102 are located on the same side of the body 1, thereby improving the convenience for staff to view the flow display 1001, the first pressure display 1101, the second pressure display 1401 and the third pressure display 1501 after the valve detection device is connected to the valve under test 100.

[0078] In some embodiments, the valve detection device further includes a controller and a touch screen 20. The touch screen 20 is located on the monitoring panel 104, and the controller is communicatively connected to the touch screen 20, the flow detection element 10, and the first pressure detection element 11. Furthermore, the controller is also communicatively connected to the second pressure detection element 14 and the third pressure detection element 15. This allows operators to input information such as the type, model, serial number, rated pressure, maximum allowable leakage, pressure holding time, and operator's name of the valve 100 under test via the touch screen 20. For example, the controller is a PLC (Programmable Controller). The usage and working principle of a PLC are existing technologies and will not be described further here.

[0079] In this embodiment, the valve to be tested 100 is an outlet valve. That is, the valve testing device of this embodiment can test the sealing performance of the outlet valve. Of course, the valve to be tested 100 can also be a safety valve. The valve testing device of this embodiment can also test the opening pressure and sealing performance of the safety valve. When testing the opening pressure of the safety valve, the pressure of the test liquid flowing into the safety valve can be increased step by step, for example, by 0.5 MPa each time, and the test result of the first pressure detection element 11 is recorded when the safety valve opens. By comparing the test result of the first pressure detection element 11 with the rated pressure of the safety valve, it can be determined whether the opening pressure of the safety valve is qualified.

[0080] For example, the detection liquid is pure water. Of course, the detection liquid can also be oil. Preferably, the detection liquid is the same as the fluid flowing in the system in which the valve under test 100 is located. For example, when oil flows in the system in which the valve under test 100 is located, then the detection liquid is oil.

[0081] For example, the working principle of the valve detection device in this embodiment is as follows:

[0082] Move the machine body 1 to the position of the valve 100 to be tested, and connect the outlet end to the valve 100 to be tested through the first extension tube, and connect the fourth end to the second end through the second extension tube.

[0083] The booster pump 3 is turned on, and the pressure built up by the booster pump 3 is adjusted through the first pressure regulating valve 6 so that the pressure built up by the booster pump 3 reaches the set value. The set value is a known value; for example, the set value is the rated pressure of the valve 100 under test.

[0084] Pressure testing procedure: Open the pressurization valve 7 and bypass valve 9 to inject the test liquid pumped by the booster pump 3 into the valve to be tested 100. At the same time, open the second pressure regulating valve 13 to return excess test liquid and the gas carried in the test liquid back to the storage tank 2.

[0085] After the valve under test 100 is filled with test liquid and vented, and the pressure of the test liquid introduced into the valve under test 100 is confirmed to be stable, the testing process begins. For example, if the test result of the third pressure detection element 15 reaches the set value, it is considered that the pressure of the test liquid introduced into the valve under test 100 is stable.

[0086] Testing procedure: Close the pressurization valve 7 and bypass valve 9 to isolate the booster pump 3 from the valve to be tested 100. The test liquid pumped out by the booster pump 3 flows back to the storage tank 2 through the pressure regulating pipeline 5. Then manually turn off the booster pump 3.

[0087] Pressure holding procedure: First, open the test control valve 8 and wait for 2 to 3 seconds, then press the test button on the touch screen 20 to perform a pressure holding test on the valve 100 under test.

[0088] Specifically, during the pressure holding test, if the flow rate measured by the flow detection element 10 is greater than the set flow rate, or the pressure measured by the first pressure detection element 11 is less than the set pressure, then the sealing performance of the valve 100 under test is unqualified. For example, alarm text or alarm indicators can be displayed on the touch screen 20 to alert personnel, and the test results can be recorded. A report containing pressure fluctuation curves, leakage rates, and test conclusions can also be generated through the controller and touch screen 20.

[0089] If, after the testing period, the flow rate measured by the flow sensor 10 is not greater than the set flow rate, or the pressure measured by the first pressure sensor 11 is not less than the set pressure, then the valve 100 under test is deemed to have passed the sealing test. For example, the touchscreen 20 can display "pass" text or a "pass" indicator to prompt the operator and record the test results. A report containing pressure fluctuation curves, leakage rates, and test conclusions can also be generated via the controller and touchscreen 20.

[0090] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. Valve testing device, characterized in that Includes a body (1), and a component disposed on said body (1): Storage tank (2), used to store the test liquid; A booster pump (3) and a detection pipeline (4) are provided. The inlet of the booster pump (3) is connected to the liquid storage tank (2). The detection pipeline (4) includes an inlet end and an outlet end. The inlet end is connected to the outlet of the booster pump (3). A pressure regulating pipeline (5) is provided, with its two ends connected to the outlets of the liquid storage tank (2) and the booster pump (3), respectively. A first pressure regulating valve (6) is provided in the pressure regulating pipeline (5); A pressurizing valve (7) is provided in the detection pipeline (4) and located between the booster pump (3) and the outlet end; A detection control valve (8) is provided in the detection pipeline (4) and located between the pressurization valve (7) and the outlet end; A bypass valve (9) is connected in parallel with the detection and control valve (8); A flow detection element (10) for detecting the flow rate of the detection liquid discharged from the detection control valve (8), and / or a first pressure detection element (11) for detecting the pressure of the detection liquid entering the detection control valve (8) and the bypass valve (9).

2. The valve testing apparatus of claim 1, wherein The valve testing device further includes a first extension tube, which includes a first end and a second end. The first end is connected to the outlet end, and the second end is used to connect to the valve (100) to be tested.

3. The valve testing apparatus of claim 2, wherein, The valve detection device also includes: The exhaust pipe (12) includes a third end and a fourth end, wherein the third end is connected to the liquid storage tank (2) and the fourth end is connected to the second end; The second pressure regulating valve (13) is located in the exhaust pipe (12).

4. The valve testing apparatus of claim 3, wherein The valve detection device further includes a second extension tube, and the fourth end is connected to the second end through the second extension tube.

5. The valve testing apparatus of claim 3, wherein The body (1) has a receiving space, and the liquid storage tank (2), the booster pump (3), the detection pipeline (4), the pressure regulating pipeline (5), and the exhaust pipeline (12) are all located within the receiving space; and / or, An operation panel (102) is provided on one side of the machine body (1), and the operation switches for the first pressure regulating valve (6), the pressurizing valve (7), the detection control valve (8), and the bypass valve (9) are all located on the operation panel (102); and / or, The outlet end is provided with a detection interface (401); the fourth end is provided with an exhaust interface (1201); one side of the body (1) is provided with an interface panel (103), and both the detection interface (401) and the exhaust interface (1201) are located on the interface panel (103); and / or, The flow detection device (10) includes a flow display (1001); the first pressure detection device (11) includes a first pressure display (1101); the body (1) includes a monitoring panel (104), and the flow display (1001) and the first pressure display (1101) are both located on the monitoring panel (104).

6. The valve testing apparatus of claim 5, wherein, The interface panel (103) and the operation panel (102) are respectively located on adjacent sides of the body (1); and / or, The monitoring panel (104) and the operation panel (102) are located on the same side of the body (1).

7. The valve testing apparatus of claim 1, wherein The valve detection device further includes a second pressure detection element (14), which is used to detect the pressure of the detection liquid discharged from the pressurizing valve (7); and / or, The valve detection device further includes a third pressure detection element (15), which is used to detect the pressure of the detection liquid at the outlet end.

8. The valve testing apparatus of claim 1, wherein, The bottom of the body (1) is provided with casters (101).

9. The valve testing apparatus of any one of claims 1-8, wherein, The valve detection device also includes a gas storage tank (17) for storing pressurized gas. The gas storage tank (17) is connected to the detection pipeline (4). The detection control valve (8) and the bypass valve (9) are both located between the gas storage tank (17) and the outlet end.

10. The valve testing apparatus of claim 9, wherein, The valve detection device further includes an inflation port (18) located on one side of the body (1), the inflation port (18) being connected to the air storage tank (17); and / or, The valve detection device also includes a liquid replenishment port (16) located on one side of the body (1), and the liquid replenishment port (16) is connected to the liquid storage tank (2).

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