High-pressure valve micro-leakage rapid detection device

Abstract

The utility model relates to the field of valve leakage detection, in particular to a high-pressure valve micro-leakage rapid detection device which comprises a helium source, a connecting device, a pressure gauge, a test suction gun and a helium detector, the connecting device is a tee joint and comprises a first connector, a second connector and a third connector, the first connector is used for being connected with the helium source, and the second connector is used for being connected with the helium detector. The second interface is connected with a pressure gauge, and the third interface is connected with a to-be-tested valve; the test suction gun is used for absorbing air from the outlet end of the valve and the outer side of the valve and conveying the air to the helium detector; the helium detector is used for detecting the helium content in the air absorbed by the test suction gun. According to the utility model, the helium leak detector is used for detecting the internal leakage and the external leakage of the valve, compared with other observation methods, the helium leak detector can accurately detect whether the valve has trace internal leakage or external leakage, can detect whether any position of the valve has a trace leakage phenomenon, and is simple in structure, convenient to operate and high in reliability. And the leak detection work of the valve can be completed without complicated operation steps.

Description

Technical Field

[0001] The utility model relates to the field of valve leakage detection, in particular to a high-pressure valve micro-leakage rapid detection device. Background Art

[0002] Containers play a vital role in the transportation and storage of high-pressure gases. Valves on containers are key components for ensuring the safe storage and transportation of gas. A leak in a valve can not only waste gas but also potentially lead to safety accidents.

[0003] At present, the leak detection method for high-pressure gas container valves is generally to observe whether the pressure indication number has dropped significantly after maintaining the pressure, or to observe whether bubbles are generated at the leak detection position by applying liquid to determine whether the valve is leaking. This method has problems such as low efficiency and low accuracy, and it is difficult to detect if there is a slight leak in the valve.

[0004] Publication No. CN112697354B discloses a helium leak detection tool and method for valves, comprising an airtight barrel, a cover plate, an external joint, an internal joint, and an outer nut. The bottom of the airtight barrel is provided with an opening connected to a helium mass spectrometer. The cover plate is provided at the top opening of the airtight barrel, and a pipe nozzle is provided through the cover plate. The upper end of the pipe nozzle is connected to a helium source via an external joint. The valve to be leaked is placed in the airtight barrel, one end of the internal joint is connected to the lower end of the pipe nozzle, and the other end is sealed and embedded in the leak detection nozzle of the valve to be leaked. The outer nut is sleeved on the internal joint and threadedly connected to the outside of the leak detection nozzle of the valve to be leaked. However, the invention uses an airtight barrel as a detection container. Although it can provide a closed environment, it takes up a large amount of space. Placing the valve to be leaked in the airtight barrel for detection is relatively cumbersome. The helium gas must be dispersed into the airtight barrel before detection can take place. This test is time-consuming and inefficient.

[0005] Therefore, there is an urgent need for a high-pressure valve micro-leak rapid detection device that can quickly detect whether there is a trace leakage in the valve and can recycle the test gas to reduce the test cost. Summary of the Invention

[0006] In view of this, the utility model aims to propose a high-pressure valve micro-leakage rapid detection device to solve the problems of valve micro-leakage detection being difficult to detect, having low detection efficiency and high cost.

[0007] The valve in this application can be a high-pressure valve with an operating pressure range of 20-100Mpa. This makes the requirements for the detection device quite different from those for normal pressure detection. High-strength materials are required, and the sealing requirements also put forward higher requirements. Simple rubber sealing rings or gaskets cannot meet the requirements. There are also significant differences in the connection structure, operation and maintenance.

[0008] The technical solution of the utility model is achieved as follows: a high-pressure valve micro-leakage rapid detection device, including a helium gas source, a connecting device, a pressure gauge, a test sniffing gun and a helium detector,

[0009] The connecting device is a tee, comprising a first interface, a second interface, and a third interface, wherein the first interface is used to connect to the helium gas source, the second interface is used to connect to the pressure gauge, and the third interface is used to connect to the valve to be tested;

[0010] The test suction gun is used to absorb air from the outlet end of the valve and the outside of the valve, and transmit the gas to the helium detector;

[0011] The helium detector is used to detect the helium content in the air absorbed by the test sniffer.

[0012] Furthermore, the cross-section of the connecting device is square, the first interface and the second interface are on the same axis, and the center line of the third interface is perpendicular to the center line of the first interface.

[0013] Furthermore, the first interface and the second interface are 1 / 4NPT tapered threads, and the third interface is a standard thread.

[0014] Furthermore, the third interface of the connecting device is connected to the inlet end of the valve through a gasket and a spherical joint.

[0015] Furthermore, the spherical joint includes two bosses and a joint body, the two bosses are respectively arranged adjacent to the two ends of the joint body, and the outer diameter of the joint body is provided with threads from the bosses to the ends for respectively connecting the connecting device and the valve.

[0016] Furthermore, the spherical joint is threadedly connected to the inner wall of the inlet end of the valve, and a double-layer sealing member is provided between the spherical joint and the inner wall of the inlet end.

[0017] Furthermore, it also includes a jacket nut for fastening the connection between the inlet end and the spherical joint from the outside of the spherical joint.

[0018] Furthermore, the connecting device is provided with a mounting threaded hole for fixing the connecting device on the operating table.

[0019] Furthermore, a gas source switch is provided between the helium gas source and the connecting device.

[0020] Furthermore, the gas source switch is connected to a vacuum pump for recovering helium in the device after the test is completed.

[0021] Compared with the existing technology, the high-pressure valve micro-leakage rapid detection device of the utility model has the following advantages:

[0022] 1. The detection device of the utility model uses a helium leak detector to detect internal and external leakage of the valve. Compared with other observation methods, it can accurately detect whether there is a small amount of internal or external leakage in the valve, and can detect whether there is a small leak at any position of the valve. It has a simple structure and is easy to operate. The valve leak detection work can be completed without complicated operating steps.

[0023] 2. Compared with the previous leak detection method of observing pressure changes, the detection device of the utility model can quickly detect the leakage of the valve, and the valve and the leak detection device are connected by a joint, which can be easily and quickly replaced with other valves to be detected, thereby improving the detection efficiency and saving time and labor costs.

[0024] 3. The detection device of the utility model can detect valve leakage problems in time, avoid safety accidents caused by leakage, and improve the safety of high-pressure gas containers.

[0025] 4. The detection device of the utility model is provided with a switch valve at the gas source, and the residual gas after the test can be recycled to avoid waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The accompanying drawings, which constitute part of the present invention, are intended to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are intended to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0027] Figure 1 This is a schematic diagram of the structure of the device of the utility model.

[0028] Description of reference numerals:

[0029] 1. Helium source; 2. Connecting device; 201, first interface; 202, second interface; 203, third interface; 204, mounting threaded hole; 3. Pressure gauge; 4. Test sniffer gun; 5. Helium detector; 6. Valve; 601, inlet port; 602, outlet port; 7. Gasket; 8. Ball joint; 801, boss; 802, joint body; 9. Jacket nut; 10. Gas source switch. DETAILED DESCRIPTION

[0030] In order to make the technical means, objectives and effects of the present invention easier to understand, embodiments of the present invention are described in detail below with reference to specific drawings.

[0031] It should be noted that all directional and positional terms in this utility model, such as "upper," "lower," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," "center," etc., are used only to explain the relative positional relationships and connections between components in a specific state. They are intended solely to facilitate the description of this utility model and do not require that this utility model must be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., used in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly indicating the number of the technical features indicated.

[0032] In the description of this utility model, unless otherwise specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections; they can refer to direct connections, indirect connections through an intermediary, or internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on the specific circumstances.

[0033] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the illustrative use of the above terms does not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0034] The utility model discloses a high-pressure valve micro-leakage rapid detection device, comprising a helium gas source 1, a connecting device 2, a pressure gauge 3, a test suction gun 4 and a helium detector 5.

[0035] The connecting device 2 is a three-way connection, comprising a first interface 201, a second interface 202, and a third interface 203. The first interface 201 is used to connect to the helium source 1, the second interface 202 is used to connect to the pressure gauge 3, and the third interface 203 is used to connect to the valve 6 to be tested.

[0036] The test sniffer gun 4 is used to absorb air from the outlet end 602 of the valve 6 and the outside of the valve 6, and transmit the gas to the helium detector 5;

[0037] The helium detector 5 is used to detect the helium content in the air absorbed by the test sniffer 4 .

[0038] The helium source 1 provides the helium required for testing. Helium has an extremely low molecular weight and high penetrability. Using helium as a tracer gas in combination with the helium detector 5 can accurately detect even very small leaks. The micro-leakage detection of the valve 6 can be completed in a short time with high detection accuracy and efficiency.

[0039] The connecting device 2 is a three-way connector with three interfaces that can connect the helium source 1, the pressure gauge 3, and the valve to be tested 6, simplifying the construction process of the entire detection system.

[0040] The pressure gauge 3 can monitor the pressure inside the system in real time. The pressure gauge 3 is set close to the valve 6, which can better measure the pressure inside the valve 6, ensure that the required pressure level is reached and maintained, and can observe the pressure changes in real time during the detection process, detect abnormalities in time and take measures, which helps to improve safety.

[0041] Preferably, the pressure gauge 3 is a precision pressure gauge.

[0042] The test sniffer 4 absorbs air from the outlet 602 and the outside of the valve 6 and transmits the gas to the helium detector 5. The helium detector 5 detects the helium content in the air absorbed by the test sniffer 4 to determine whether there is a leak. The helium detector 5 has high sensitivity and can not only detect internal leaks by detecting the outlet 602 after closing the valve 6, but also detect external leaks by detecting the outside of the valve 6 after opening the valve 6, thereby comprehensively evaluating the sealing performance of the valve 6.

[0043] This setup connects the helium source 1, the pressure gauge 3, and the valve to be tested 6 together through a connecting device 2, which simplifies the construction process of the entire detection system. The standardized connection method and intuitive operation process reduce the operational difficulty, making the detection process simpler and faster. It can not only perform internal leakage detection, but also external leakage detection, which helps to comprehensively evaluate the sealing performance of the valve 6.

[0044] Specifically, the working pressure range of the valve 6 is 20-100 MPa.

[0045] Since the working pressure range of valve 6 is 20-100Mpa, the requirements for the detection device are quite different from those for normal pressure detection. High-strength materials are required, and higher requirements are also put forward for sealing. Simple rubber sealing rings or gaskets 7 cannot meet the requirements, and the connection structures must also be quite different.

[0046] Preferably, the working pressure range of the valve 6 is 35-45 MPa.

[0047] Specifically, the cross section of the connecting device 2 is square, the first interface 201 and the second interface 202 are on the same axis, and the center line of the third interface 203 is perpendicular to the center line of the first interface 201 .

[0048] The connecting device 2 has a square cross-section, providing a stable structural foundation and facilitating installation and fixation. The first interface 201 and the second interface 202 are on the same axis, ensuring a straight connection between the helium source 1 and the pressure gauge 3, reducing fluid resistance. The centerline of the third interface 203 is perpendicular to the centerline of the first interface 201, allowing the valve 6 to be installed perpendicular to the connection direction between the helium source 1 and the pressure gauge 3, thereby optimizing the spatial layout.

[0049] The first interface 201 and the second interface 202 are coaxial, ensuring that the gas flow path from the helium source 1 to the pressure gauge 3 is the shortest and most direct, reducing flow resistance. The vertical arrangement of the third interface 203 causes the flow direction of the gas to turn 90 degrees when entering the valve 6, which helps to evenly distribute the gas and reduce turbulence.

[0050] The square cross-section and clear interface layout make the connecting device 2 easy to install and fix on the operating table. The clear interface layout facilitates regular inspection and maintenance, ensuring the sealing and connection reliability of each interface.

[0051] This setting is achieved by designing the cross-section of the connecting device 2 to be square, and making the first interface 201 and the second interface 202 on the same axis, and the center line of the third interface 203 perpendicular to the center line of the first interface 201. This design not only improves the stability of the structure and the fluid dynamics performance, but also simplifies the installation and maintenance process.

[0052] Specifically, the first interface 201 and the second interface 202 are 1 / 4 NPT tapered threads, and the third interface 203 is a standard thread.

[0053] The first interface 201 uses a 1 / 4 NPT tapered thread to connect to the helium gas source 1, which can ensure that helium can smoothly enter the system. The NPT tapered thread has a tight fit through the tapered thread, so that the thread can produce a larger contact area when tightened, thereby improving the sealing performance and preventing gas leakage.

[0054] The second interface 202 uses a 1 / 4 NPT tapered thread to connect to the precision pressure gauge 3, which can monitor the pressure in the system in real time. The sealing characteristics of the NPT tapered thread are also used to ensure that there is no leakage at the connection between the pressure gauge 3 and the system.

[0055] The third interface 203 uses a standard thread to connect to the valve 6 to be inspected, and can be adapted to various types of valve 6 interfaces, thereby increasing the versatility of the connecting device 2 .

[0056] This setting combines the advantages of high sealing, easy installation, reliability and versatility by using 1 / 4NPT tapered threads and standard threads. In particular, for leakage detection of valve 6, NPT tapered threads provide reliable sealing performance, while standard threads increase the versatility and flexibility of connection device 2, which not only improves the accuracy of detection, but also simplifies the operation process and reduces maintenance costs.

[0057] Specifically, the third interface 203 of the connecting device 2 is connected to the inlet end 601 of the valve 6 through the gasket 7 and the spherical joint 8 in sequence.

[0058] The gasket 7 is placed between the third interface 203 and the spherical joint 8 to provide an additional sealing layer to prevent gas leakage and protect the interface surface from wear or damage caused by direct contact.

[0059] The spherical joint 8 allows a certain degree of angle adjustment to ensure good sealing performance even when there is a slight deviation during installation. The design of the spherical joint usually includes a spherical surface and a conical seat, which fit closely together to provide a reliable sealing effect.

[0060] The inlet end 601 of the valve 6 is connected to the spherical joint 8 to form a complete test loop, ensuring that high-pressure gas can be safely introduced into the interior of the valve 6 for leak detection.

[0061] This connection method combines the advantages of high sealing, flexibility, ease of installation, and reliability by using standard threads, gaskets 7, and ball joints 8. Especially for leak detection of high-pressure valves 6, this connection method not only ensures the accuracy of detection, but also simplifies the operation process and reduces maintenance costs. In addition, this design improves the overall reliability and safety of the system and is suitable for various high-pressure applications.

[0062] Specifically, the spherical joint 8 includes two bosses 801 and a joint body 802. The two bosses 801 are respectively arranged near the two ends of the joint body 802. The outer diameter of the joint body 802 is provided with threads from the bosses 801 to the ends for connecting the connecting device 2 and the valve 6 respectively.

[0063] The boss 801 on the joint body 802 of the spherical joint 8 serves as a positioning reference to ensure that the connection position of the connecting device 2 and the valve 6 to the spherical joint 8 is correct, thereby improving the installation accuracy. The boss 801 is threadedly matched with the end of the joint body 802 to ensure that the connecting device 2 and the valve 6 are firmly fixed to the spherical joint 8 to prevent loosening or dislocation. The boss 801 serves as a positioning reference to simplify the assembly process and ensure the correct installation of the parts. The boss 801 cooperates with the inlet end 601 to provide a good sealing effect to prevent gas leakage.

[0064] Preferably, the spherical joint 8 is a universal ball joint.

[0065] This setting uses a universal ball joint as a connector between the third interface 203 of the connecting device 2 and the inlet end 601 of the valve 6, which not only provides a high degree of flexibility and excellent sealing performance, but also simplifies the installation and maintenance process. It is particularly suitable for leakage detection of high-pressure valves 6 and can provide reliable connection and sealing in complex and restricted installation environments, ensuring the accuracy of detection and the safety of the system.

[0066] Specifically, the spherical joint 8 is threadedly connected to the inner wall of the inlet end 601 of the valve 6 , and a double-layer sealing member is provided between the spherical joint 8 and the inner wall of the inlet end 601 .

[0067] By setting a double-layer seal between the spherical joint 8 and the inner wall of the inlet end 601, double sealing protection can be provided, significantly improving the sealing performance of the system. Even if one layer of seal fails, the other layer of seal can continue to work, ensuring that the system does not leak under high pressure conditions.

[0068] The spherical joint 8 is connected to the inlet end 601 of the valve 6 by a threaded connection, ensuring the firmness and stability of the connection part. The threaded connection method can achieve precise positioning, ensuring the correct alignment between the spherical joint 8 and the inlet end 601, making the installation process simple and quick without the need for complex tools or equipment. When maintenance or replacement is required, it can be easily disassembled and reinstalled, reducing downtime.

[0069] This arrangement provides a double-layer seal between the spherical joint 8 and the inner wall of the inlet end 601 of the valve 6, and connects them through threads. This design not only significantly improves the sealing performance and connection reliability of the system, but also simplifies the installation and maintenance process.

[0070] Specifically, it further includes a jacket nut 9 for fastening the connection between the inlet end 601 and the spherical joint 8 from the outside of the spherical joint 8 .

[0071] This arrangement securely connects the inlet end 601 of the valve 6 to the spherical joint 8 by tightening the outer nut 9. The tightening force of the outer nut 9 further compresses the seal between the spherical joint 8 and the inlet end 601, improving the sealing performance of the entire connection, ensuring the structural integrity of the connection, and preventing loosening due to vibration or external stress. At the same time, it provides multiple sealing guarantees to ensure reliable sealing under high pressure conditions. The outer nut 9 is generally designed to be very strong and can maintain its tightening force during long-term use, reducing the need for regular maintenance, and can withstand external vibration and impact, ensuring the stability and reliability of the connection.

[0072] Specifically, a limiting structure is provided at one end of the outer sleeve nut 9 to limit the displacement of the spherical joint 8 .

[0073] The limiting structure can prevent the spherical joint 8 from excessive movement during installation or use, ensuring the stability and consistency of the connection part. By limiting the displacement of the spherical joint 8, it ensures that it is correctly aligned with the inlet end 601 of the valve 6, thereby maintaining good sealing performance, helping to evenly distribute the pressure applied by the outer sleeve nut 9 and avoid damage caused by local overpressure.

[0074] This arrangement contributes to the reliability and stability of the connection structure between the spherical joint 8 and the inlet end 601, provides multiple sealing guarantees for the device, ensures reliable sealing under high pressure conditions, reduces safety hazards caused by leakage, and enables rapid disassembly and reinstallation.

[0075] Specifically, a mounting threaded hole 204 is provided on the connecting device 2 for fixing the connecting device 2 on the operating table.

[0076] By installing the threaded hole 204, the connecting device 2 can be firmly fixed to the operating table with bolts or screws to ensure that it does not move or loosen during the test. The installing threaded hole 204 provides a clear fixing point to ensure that the position of the connecting device 2 on the operating table is accurate, which can reduce the shaking caused by external vibration or operation and ensure the stability during the test. When performing high-pressure gas inflation or leak detection, the connecting device 2 will not shift due to pressure changes or external forces, reducing the risk of damage caused by accidental collision or movement and improving the safety of operation. The fixed connecting device 2 is more stable, which is convenient for the operator to perform other operations, such as connecting the helium gas source 1, the pressure gauge 3, etc.

[0077] This setting can firmly fix the connecting device 2 on the operating table by providing a mounting threaded hole 204 on the connecting device 2, which not only improves the stability and test accuracy of the system, but also enhances the safety and convenience of operation. The use of the mounting threaded hole 204 also enhances the durability and vibration resistance of the system.

[0078] Specifically, a gas source switch 10 is provided between the helium gas source 1 and the connecting device 2 .

[0079] The gas source switch 10 controls the opening and closing of the helium flow from the helium source 1 to the connecting device 2, ensuring timely helium supply when needed and shutting off the flow when not needed. The gas source switch 10 can also have a flow control function, and can adjust the helium flow rate to meet different testing requirements.

[0080] When an accident occurs or the gas supply needs to be stopped urgently, the helium supply can be quickly cut off through the gas source switch 10 to improve the safety of the system.

[0081] The gas source switch 10 provides a convenient operating point, allowing operators to easily control the supply of helium without having to directly operate a complex helium gas source system. The gas source switch 10 can simplify the control process of the helium supply and improve operational efficiency.

[0082] This arrangement can achieve precise control of the helium supply by providing a gas source switch 10 between the helium source 1 and the connecting device 2, thereby improving the safety, operational convenience and resource utilization of the system.

[0083] Specifically, the gas source switch 10 can also be connected to a vacuum pump to recover the helium in the device after the test is completed.

[0084] By connecting to the vacuum pump, the gas source switch 10 can extract and recycle the helium in the device after the test is completed, reducing the waste of helium. The recycled helium can be reused after processing, improving resource utilization. At the same time, the recycled helium can reduce the residual helium concentration in the test environment, avoid interference with subsequent tests, ensure that the helium concentration in the test environment is within a safe range, and prevent safety hazards caused by excessive helium concentration.

[0085] The vacuum pump can completely remove the helium in the device, providing clean initial conditions for the next test, ensuring that there is no residual helium in the device before each test, and improving the accuracy and consistency of the test results.

[0086] This setting can achieve the recovery and reuse of helium by setting a gas source switch 10 between the helium source 1 and the connecting device 2, and connecting an exhaust pump to recover the helium in the device after the test is completed, saving costs, protecting the environment, and improving test accuracy and operational convenience.

[0087] How to use the high-pressure valve micro-leakage rapid detection device:

[0088] S1: First, select a suitable spherical joint 8 and outer nut 9 according to the thread type of the inlet end 601 of the valve 6 to be tested, and ensure good sealing performance when connected to the detection device.

[0089] S2: Install the pressure gauge 3 on the detection connection device 2.

[0090] S3: Install the sealing gasket 7 and the spherical joint 8 at the connection part between the connecting device 2 and the valve 6 to ensure the sealing during the detection process.

[0091] S4: Install the valve to be tested 6 on the connecting device 2 through the spherical joint 8 and the outer nut 9, close the valve 6, and then pressurize the interior of the connecting device 2 through the helium gas source 1.

[0092] S5: Observe the internal pressure of the connecting device 2 and the valve 6 through the pressure gauge 3, wait until the pressure reaches the nominal working pressure of the valve 6 and maintain the pressure until the pressure stabilizes.

[0093] S6: After ensuring that the valve 6 is closed, the operator uses the helium detector 5 to detect the outlet end 602 of the valve 6, and determines whether the valve 6 has internal leakage based on the value of the helium detector 5; after sealing the outlet end 602 of the valve 6 with a plug, the valve 6 is opened and the part to be inspected on the outside of the valve 6 is inspected, and the value of the helium detector 5 is used to determine whether the valve 6 has external leakage.

[0094] The helium detector 5 is a helium leak detector.

[0095] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-pressure valve micro-leakage rapid detection device, comprising a helium gas source (1), a connecting device (2), a pressure gauge (3), a test suction gun (4) and a helium detector (5), characterized in that: The connecting device (2) is a three-way connection, comprising a first interface (201), a second interface (202), and a third interface (203), wherein the first interface (201) is used to connect to the helium gas source (1), the second interface (202) is used to connect to the pressure gauge (3), and the third interface (203) is used to connect to the valve (6) to be tested; The test suction gun (4) is used to absorb air from the outlet end (602) of the valve (6) and the outside of the valve (6), and transmit the gas to the helium detector (5); The helium detector (5) is used to detect the helium content in the air absorbed by the test suction gun (4).

2. The high-pressure valve micro-leakage rapid detection device according to claim 1 is characterized in that: The cross section of the connecting device (2) is square, the first interface (201) and the second interface (202) are on the same axis, and the center line of the third interface (203) is perpendicular to the center line of the first interface (201).

3. The high-pressure valve micro-leakage rapid detection device according to claim 2 is characterized in that: The first interface (201) and the second interface (202) are 1 / 4NPT tapered threads, and the third interface (203) is a standard thread.

4. The high-pressure valve micro-leakage rapid detection device according to claim 2 is characterized in that: The third interface (203) of the connecting device (2) is connected to the inlet end (601) of the valve (6) via a gasket (7) and a spherical joint (8).

5. The high-pressure valve micro-leakage rapid detection device according to claim 4 is characterized in that: The spherical joint (8) comprises two bosses (801) and a joint body (802), wherein the two bosses (801) are respectively arranged adjacent to the two ends of the joint body (802), and the outer diameter of the joint body (802) is provided with threads from the bosses (801) to the ends, for respectively connecting the connecting device (2) and the valve (6).

6. The high-pressure valve micro-leakage rapid detection device according to claim 4 is characterized in that: The spherical joint (8) is threadedly connected to the inner wall of the inlet end (601) of the valve (6), and a double-layer sealing member is provided between the spherical joint (8) and the inner wall of the inlet end (601).

7. The high-pressure valve micro-leakage rapid detection device according to claim 4 is characterized in that: It also includes a jacket nut (9) for fastening the connection between the inlet end (601) and the spherical joint (8) from the outside of the spherical joint (8).

8. The high-pressure valve micro-leakage rapid detection device according to claim 1 is characterized in that: The connecting device (2) is provided with a mounting threaded hole (204) for fixing the connecting device (2) on an operating table.

9. The high-pressure valve micro-leakage rapid detection device according to claim 1, characterized in that: A gas source switch (10) is provided between the helium gas source (1) and the connecting device (2).

10. The high-pressure valve micro-leakage rapid detection device according to claim 9, characterized in that: The gas source switch (10) is connected to a vacuum pump for recovering the helium in the device after the test is completed.

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