A self-closing valve detection method with an over-current cut-off interchange structure

Abstract

The present invention discloses a self-closing valve detection method with an over-current cut-off interchange structure, comprising: step S1: performing air tightness detection on the self-closing valve, if qualified, executing step S2; step S2: performing overpressure and under-pressure automatic closing performance detection on the self-closing valve, if qualified, executing step S3; step S3: installing a flow meter component in the self-closing valve; step S4: performing over-current automatic closing performance detection on the self-closing valve equipped with the flow meter component, obtaining the detection value of the over-current automatic closing performance and the detection equipment information of the over-current automatic closing performance detection on the self-closing valve, if qualified, executing step S5, if unqualified, removing the flow meter component, and returning to step S3; step S5: generating a traceability code and assigning it to the self-closing valve. The present invention can store data of multiple detection items using one product traceability code, and the data association is the most convenient, ensuring that the data of each product real detection is traceable.

Description

Technical Field

[0001] The invention relates to the technical field of self-closing valves, and in particular to a self-closing valve detection method with an over-current cut-off interchange structure. Background Art

[0002] The pipeline gas self-closing valve is installed on the indoor gas pipeline. It has the functions of automatic closing in case of overpressure, automatic closing in case of underpressure, and automatic closing in case of overcurrent. It does not require external power when closing and needs to be opened manually after closing. Because it is related to the safety of life and property of users, valve manufacturers test the internal and external air tightness of valves, the automatic closing performance in case of overpressure and underpressure, and the automatic closing performance in case of overcurrent before the products leave the factory to ensure that the quality of the products leaving the factory meets the standards.

[0003] The detection of self-closing valves has evolved from manual detection to automatic detection through detection devices, but there are still problems in the traceability of product quality information. Currently, only batch information can be traced, and the detection data of each product cannot be found.

[0004] Moreover, currently the assembled self-closing valve is tested for air tightness, overpressure and underpressure automatic closing performance, and overcurrent automatic closing performance. When one of the performances fails, the entire self-closing valve product will be scrapped, the scrap rate is high, and some usable parts are wasted. Summary of the invention

[0005] In view of the above problems existing in the existing self-closing valve detection, a self-closing valve detection method with an over-current cut-off interchangeable structure is now provided.

[0006] The specific technical solutions are as follows:

[0007] A method for detecting a self-closing valve with an over-current cut-off interchange structure comprises: step S1: performing an air tightness test on the self-closing valve, if the test is qualified, executing step S2, if the test is unqualified, exiting;

[0008] Step S2: Perform overpressure and underpressure automatic closing performance detection on the self-closing valve, obtain the detection value of overpressure and underpressure automatic closing performance, and the detection equipment information of overpressure and underpressure automatic closing performance detection on the self-closing valve, if qualified, execute step S3, if unqualified, exit;

[0009] Step S3: installing a flow-through device assembly in the self-closing valve;

[0010] Step S4: Perform an over-current automatic closing performance test on the self-closing valve equipped with the over-current device assembly, obtain the test value of the over-current automatic closing performance and the information of the testing equipment used to perform the over-current automatic closing performance test on the self-closing valve, if qualified, execute step S5, if unqualified, remove the over-current device assembly, and return to step S3;

[0011] Step S5: Generate a traceability code based on the detection value of the overpressure and underpressure automatic closing performance, the detection equipment machine information for detecting the overpressure and underpressure automatic closing performance of the self-closing valve, the detection value of the overcurrent automatic closing performance, and the detection equipment machine information for detecting the overcurrent automatic closing performance of the self-closing valve, and assign it to the self-closing valve.

[0012] In the above-mentioned self-closing valve detection method with over-current cut-off interchange structure, the detection equipment for performing over-current automatic closing performance detection on the self-closing valve comprises:

[0013] A test bench, wherein an air source, an adjustment component, a display device and a controller are provided in the test bench, and at least one clamping device is provided on the test bench, wherein the clamping device is used to install a self-closing valve, and the adjustment component includes: an exhaust valve;

[0014] The self-closing valve is provided with a lifting button and an indicating button, wherein the indicating button is located inside the lifting button. The indicating button is in three states: the lowest position, the middle position and the highest position on the self-closing valve. The indicating button rises together with the lifting button. The lifting button automatically descends by its own weight. When the indicating button is in the lowest position, the lifting button is also at the lowest point within its range of motion.

[0015] The clamping device comprises:

[0016] A base, on which a first fixing block is slidably provided and a second fixing block is fixedly provided, the self-closing valve is installed on the base, the air outlet end of the self-closing valve is clamped with the second fixing block, the first fixing block is directly opposite to the air inlet end of the self-closing valve, and is used to supply air to the air inlet end of the self-closing valve, the first fixing block is connected to the air source, and the exhaust valve is located between the first fixing block and the air source;

[0017] A first cylinder and a second cylinder, wherein the first cylinder and the second cylinder are arranged on the base, the first cylinder is drivingly connected with a lifting manipulator, the lifting manipulator is clamped with the lifting button, the second cylinder is drivingly connected with the first fixing block, the second cylinder pushes the first fixing block, so that the first fixing block is clamped and fixed with the air inlet end of the self-closing valve;

[0018] The first cylinder, the second cylinder, the display device, and the exhaust valve are respectively connected to the controller signal.

[0019] The above-mentioned self-closing valve detection method with over-current cut-off interchange structure, wherein step S4 comprises:

[0020] Step S4.1: installing the self-closing valve on the base, docking the air outlet end of the self-closing valve with the second fixing block, and clamping the lifting button of the self-closing valve into the lifting manipulator;

[0021] Step S4.2: the second cylinder pushes the first fixing block so that the first fixing block is clamped and fixed with the air inlet end of the self-closing valve. At this time, the pull button of the self-closing valve is at the lowest position, and the indicator button of the self-closing valve is at the lowest position;

[0022] Step S4.3: A gas with a pressure of 2 kPa is introduced into the air inlet end of the self-closing valve, and the first air cylinder drives the lifting manipulator to lift the lifting button of the self-closing valve. The self-closing valve is in an open state, the lifting button of the self-closing valve automatically drops, and the indicator button of the self-closing valve reaches the middle position;

[0023] Step S4.4: the controller adjusts the exhaust valve so that the pressure difference between the air inlet end of the self-closing valve and the air outlet end of the self-closing valve is 300 Pa;

[0024] Step S4.5: The controller obtains the first flow value of the self-closing valve and compares it with the set rated flow value. If the first flow value is within the range of the rated flow value, the display device displays a green light, and the self-closing valve is determined to be qualified under the rated flow state, and step S4.6 is executed; if the first flow value is not within the range of the rated flow value, the display device displays a red light, and the self-closing valve is determined to be unqualified, and the process returns to step S3;

[0025] Step S4.6: The controller automatically and slowly adjusts the exhaust valve to increase the gas flow until the self-closing valve automatically closes and the indicator button is at the lowest position;

[0026] Step S4.7: The controller obtains the second flow value when the self-closing valve is closed, and compares it with the flow threshold for automatic closing due to excess flow; if the second flow value is within the range of the flow threshold for automatic closing due to excess flow, the display device displays a green light, and the self-closing valve is determined to be qualified, and step S5 is executed; if the second flow value is not within the range of the flow threshold for automatic closing due to excess flow, the display device displays a red light, and the self-closing valve is determined to be unqualified, and the process returns to step S3.

[0027] In the above-mentioned self-closing valve detection method with an over-current cut-off interchange structure, a flow-through device assembly is arranged in the air inlet end of the self-closing valve, and the flow-through device assembly comprises:

[0028] A first flow-through member, the first flow-through member is fixedly connected to the inner wall of the self-closing valve, and the first flow-through member is provided with a plurality of first flow-through holes;

[0029] A second flow-through member, the second flow-through member is fixedly connected to the first flow-through member, and the second flow-through member is provided with a plurality of second flow-through holes;

[0030] A blocking member, the blocking member is movably disposed between the first flow-through member and the second flow-through member, and the blocking member cooperates with a plurality of the second flow-through holes for blocking;

[0031] An elastic member is sleeved on the blocking member, and two ends of the elastic member are respectively against the second flow-through member and the blocking member.

[0032] The above-mentioned self-closing valve detection method with flow cut-off interchangeable structure, wherein a first movable hole is provided in the middle of the first flow-through part, a second movable hole is provided in the middle of the second flow-through part, and the two ends of the blocking part are slidably matched with the first movable hole and the second movable hole respectively.

[0033] In the above-mentioned self-closing valve detection method with an over-flow cut-off interchangeable structure, the sum of the cross-sectional areas of a plurality of the second over-flow holes is greater than the sum of the cross-sectional areas of a plurality of the first over-flow holes.

[0034] The above-mentioned self-closing valve detection method with an over-flow cut-off interchangeable structure, wherein the plurality of first over-flow holes include: a plurality of first holes, a plurality of second holes and a plurality of third holes, the plurality of first holes are located on the periphery of the first movable hole, and are arranged at equal intervals along the circumferential direction of the first over-flow member, the plurality of second holes and the plurality of third holes are located on the periphery of the plurality of first holes, and the plurality of second holes and the plurality of third holes are arranged at intervals along the circumferential direction of the first over-flow member.

[0035] In the above-mentioned self-closing valve detection method with an over-flow cut-off interchangeable structure, the number of the first over-flow holes is two, and the two first over-flow holes are symmetrically arranged on both sides of the first movable hole.

[0036] The above-mentioned self-closing valve detection method with an over-flow cut-off interchangeable structure, wherein the plurality of first over-flow holes include: a plurality of fourth holes, a plurality of fifth holes and a plurality of sixth holes, the plurality of fourth holes are located on the periphery of the first movable hole and are arranged along the circumferential direction of the first over-flow component, the plurality of fifth holes and the plurality of sixth holes are located on the periphery of the plurality of fourth holes, and the plurality of fifth holes and the plurality of sixth holes are arranged along the circumferential direction of the first over-flow component.

[0037] Compared with the prior art, the above technical solution has the following positive effects:

[0038] When one product is tested for multiple items, the present invention can use one product traceability code to store the data of multiple test items, which is the most convenient for data association and ensures that the data of each product's real test can be traced;

[0039] The present invention can conveniently realize the convenient interchange of the cutting process by first performing internal and external air tightness tests, then performing overpressure and underpressure automatic closing performance tests, and then installing a flow meter assembly in the self-closing valve, and then performing overcurrent automatic closing performance tests. Such a sequential step setting and qualified coding method is the best way to achieve qualified product logistics and information data circulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the overall structure of a testing platform in a self-closing valve testing method with an over-current cut-off interchange structure according to the present invention;

[0041] Figure 2 It is a structural schematic diagram of a clamping assembly in a self-closing valve detection method with an over-current cut-off interchange structure according to the present invention;

[0042] Figure 3 It is a structural schematic diagram of a self-closing valve in a self-closing valve detection method with an over-current cut-off interchange structure according to the present invention;

[0043] Figure 4 It is a structural schematic diagram of a flow-through device assembly in a self-closing valve detection method with an over-current cut-off interchange structure according to the present invention;

[0044] Figure 5 It is a structural cross-sectional view of a first embodiment of a first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0045] Figure 6 It is a structural side view of a first embodiment of a first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0046] Figure 7 It is a structural cross-sectional view of a second embodiment of the first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0047] Figure 8 It is a structural side view of a second embodiment of the first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0048] Fig. 9 It is a structural cross-sectional view of a third embodiment of the first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0049] Fig.10 It is a structural side view of a third embodiment of the first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention;

[0050] In the attached drawings: 1. self-closing valve; 2. flow device assembly; 3. testing platform; 4. clamping device; 5. lifting button; 6. indicator button; 7. base; 8. first cylinder; 9. second cylinder; 10. lifting manipulator; 11. first fixed block; 12. second fixed block; 13. display device; 21. first flow member; 22. second flow member; 23. blocking member; 24. elastic member; 25. first flow hole; 26. second flow hole; 27. first movable hole; 28. second movable hole; 31. first hole; 32. second hole; 33. third hole; 34. fourth hole; 35. fifth hole; 36. sixth hole. DETAILED DESCRIPTION

[0051] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0052] Figure 1 The overall structure diagram of the detection platform in the detection method of the self-closing valve with over-current cut-off interchange structure of the present invention is shown in FIG. Figure 2 It is a structural schematic diagram of a clamping assembly in a self-closing valve detection method with an over-current cut-off interchange structure according to the present invention. Figure 3 It is a structural schematic diagram of a self-closing valve in a self-closing valve detection method with an over-current cut-off interchange structure according to the present invention. Figure 4 It is a structural schematic diagram of a flow meter assembly in a self-closing valve detection method with a flow cut-off interchange structure according to the present invention, Figure 5 It is a structural cross-sectional view of a first embodiment of a first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure according to the present invention, Figure 6 It is a structural side view of a first embodiment of a first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure of the present invention, Figure 7 It is a structural cross-sectional view of a second embodiment of the first flow-through component in a self-closing valve detection method with a flow-through cut-off interchange structure according to the present invention. Figure 8 FIG. 1 is a structural side view of a second embodiment of the first flow-through member in a self-closing valve detection method with a flow-through cut-off interchange structure according to the present invention. Figures 1 to 8 As shown, a preferred embodiment of a self-closing valve detection method with an over-current cut-off interchange structure is shown, comprising: step S1: performing an air tightness test on the self-closing valve 1, if it is qualified, executing step S2, if it is unqualified, exiting;

[0053] Step S2: Perform overpressure and underpressure automatic closing performance test on the self-closing valve 1, obtain the test values ​​of overpressure and underpressure automatic closing performance, and the test equipment information of the overpressure and underpressure automatic closing performance test on the self-closing valve 1, if qualified, execute step S3, if not qualified, exit;

[0054] Step S3: installing the flow-through device assembly 2 in the self-closing valve 1;

[0055] Step S4: Perform an over-current automatic closing performance test on the self-closing valve 1 equipped with the over-current device assembly 2, obtain the test value of the over-current automatic closing performance and the test equipment information of the over-current automatic closing performance test on the self-closing valve 1, if qualified, execute step S5, if unqualified, remove the over-current device assembly 2, and return to step S3;

[0056] Step S5: Generate a traceability code based on the detection value of overpressure and underpressure automatic closing performance, the detection equipment machine information for overpressure and underpressure automatic closing performance detection of the self-closing valve 1, the detection value of overcurrent automatic closing performance, and the detection equipment machine information for overcurrent automatic closing performance detection of the self-closing valve 1, and assign it to the self-closing valve.

[0057] Further, as a preferred embodiment, the detection equipment for detecting the over-current automatic closing performance of the self-closing valve 1 includes: a detection table 3, in which an air source (not shown in the figure), an adjustment component (not shown in the figure), a display device 13 and a controller (not shown in the figure) are provided, and at least one clamping device 4 is provided on the detection table 3, and the clamping device 4 is used to install the self-closing valve 1, and the adjustment component includes: an exhaust valve.

[0058] Further, as a preferred embodiment, the self-closing valve 1 has a lifting button 5 and an indicating button 6, the indicating button 6 is located inside the lifting button 5, and the indicating button 6 is in three states of the lowest position, the middle position and the highest position on the self-closing valve 1. The indicating button 6 rises together with the lifting button 5, and the lifting button 5 automatically descends by its own weight. When the indicating button 6 is in the lowest position, the lifting button 5 is also at the lowest point in its active range;

[0059] Further, as a preferred embodiment, the clamping device 4 includes: a base 7, a first cylinder 8 and a second cylinder 9, a first fixed block 11 is slidably provided on the base 7 and a second fixed block 12 is fixedly provided, the self-closing valve 1 is installed on the base 7, the air outlet end of the self-closing valve 1 is clamped with the second fixed block 12, the first fixed block 11 is directly opposite to the air inlet end of the self-closing valve 1, and is used to supply air to the air inlet end of the self-closing valve 1, the first fixed block 11 is connected to the air source, the exhaust valve is located between the first fixed block 11 and the air source, the first cylinder 8 and the second cylinder 9 are arranged on the base 7, the first cylinder 8 is transmission-connected with a lifting manipulator 10, the lifting manipulator 10 is clamped with the lifting button 5, the second cylinder 9 is transmission-connected with the first fixed block 11, the second cylinder 9 pushes the first fixed block 11, so that the first fixed block 11 is clamped and fixed with the air inlet end of the self-closing valve 1.

[0060] Further, as a preferred embodiment, the first cylinder 8, the second cylinder 9, the display device 13, and the exhaust valve are respectively connected to the controller signal.

[0061] The above are only preferred embodiments of the present invention, and are not intended to limit the implementation and protection scope of the present invention.

[0062] The present invention also has the following implementation modes based on the above:

[0063] In further embodiments of the present invention, please continue to refer to Figures 1 to 8 As shown, step S4 includes:

[0064] Step S4.1: Install the self-closing valve 1 on the base 7, dock the air outlet end of the self-closing valve 1 with the second fixing block 12, and clamp the lifting button 5 of the self-closing valve 1 into the lifting manipulator 10;

[0065] Step S4.2: The second cylinder 9 pushes the first fixing block 11 so that the first fixing block 11 is clamped and fixed to the air inlet end of the self-closing valve 1. At this time, the pull button 5 of the self-closing valve 1 is at the lowest position, and the indicator button 6 of the self-closing valve 1 is at the lowest position;

[0066] Step S4.3: A gas with a pressure of 2 kPa is introduced into the air inlet end of the self-closing valve 1, and the first air cylinder 8 drives the lifting manipulator 10 to lift the lifting button 5 of the self-closing valve 1. The self-closing valve 1 is in an open state, and the lifting button 5 of the self-closing valve 1 automatically drops, and the indicator button 6 of the self-closing valve 1 reaches the middle position;

[0067] Step S4.4: the controller adjusts the exhaust valve so that the pressure difference between the air inlet end of the self-closing valve 1 and the air outlet end of the self-closing valve 1 is 300 Pa;

[0068] Step S4.5: The controller obtains the first flow value of the self-closing valve 1 and compares it with the set rated flow value. If the first flow value is within the range of the rated flow value, the display device 13 displays a green light, and the self-closing valve 1 is determined to be qualified under the rated flow state, and step S4.6 is executed; if the first flow value is not within the range of the rated flow value, the display device 13 displays a red light, and the self-closing valve 1 is determined to be unqualified, and the process returns to step S3;

[0069] Step S4.6: The controller automatically and slowly adjusts the exhaust valve to increase the gas flow until the self-closing valve 1 automatically closes and the indicator button 6 is at the lowest position;

[0070] Step S4.7: The controller obtains the second flow value when the self-closing valve 1 is closed, and compares it with the flow threshold for automatic closing due to excessive flow. If the second flow value is within the range of the flow threshold for automatic closing due to excessive flow, the display device 13 displays a green light, and the self-closing valve 1 is determined to be qualified, and step S5 is executed; if the second flow value is not within the range of the flow threshold for automatic closing due to excessive flow, the display device 13 displays a red light, and the self-closing valve 1 is determined to be unqualified, and the process returns to step S3.

[0071] In a further embodiment of the present invention, a flow device assembly 2 is arranged inside the air inlet end of the self-closing valve 1, and the flow device assembly 2 includes: a first flow device 21, a second flow device 22, a blocking member 23 and an elastic member 24. The first flow device 21 is fixedly connected to the inner wall of the self-closing valve 1, and a plurality of first flow holes 25 are arranged on the first flow device 21. The second flow device 22 is fixedly connected to the first flow device 21, and a plurality of second flow holes 26 are arranged on the second flow device 22. The blocking member 23 is movably arranged between the first flow device 21 and the second flow device 22, and the blocking member 23 blocks and cooperates with the plurality of second flow holes 26. The elastic member 24 is sleeved on the blocking member 23, and the two ends of the elastic member 24 are respectively against the second flow device 22 and the blocking member 23.

[0072] In a further embodiment of the present invention, a first movable hole 27 is provided in the middle of the first flow member 21, a second movable hole 28 is provided in the middle of the second flow member 22, and both ends of the blocking member 23 slideably cooperate with the first movable hole 27 and the second movable hole 28 respectively.

[0073] In a further embodiment of the present invention, the sum of the cross-sectional areas of the plurality of second flow holes 26 is greater than the sum of the cross-sectional areas of the plurality of first flow holes 25 .

[0074] The first embodiment of the first flow-through member 21:

[0075] Rated flow rate: 0.9m3 / h, over-current cut-off flow rate: 1.2m3 / h;

[0076] In a further embodiment of the present invention, the plurality of first flow holes 25 include: a plurality of first holes 31, a plurality of second holes 32 and a plurality of third holes 33, the plurality of first holes 31 are located on the periphery of the first movable hole 27, and are arranged at equal intervals along the circumferential direction of the first flow member 21, the plurality of second holes 32 and the plurality of third holes 33 are located on the periphery of the plurality of first holes 31, and the plurality of second holes 32 and the plurality of third holes 33 are arranged at intervals along the circumferential direction of the first flow member 21.

[0077] Preferably, the diameter of the second hole 32 is smaller than the diameter of the first hole 31 , and the diameter of the first hole 31 is smaller than the diameter of the third hole 33 .

[0078] The second embodiment of the first flow-through member 21:

[0079] Rated flow rate: 1.2m3 / h, over-current cut-off flow rate: 1.8m3 / h;

[0080] In a further embodiment of the present invention, the number of the plurality of first flow holes 25 is two, and the two first flow holes 25 are symmetrically arranged on both sides of the first movable hole 27 .

[0081] The third embodiment of the first flow-through member 21:

[0082] Rated flow rate: 0.6m3 / h, over-current cut-off flow rate: 1m3 / h;

[0083] In a further embodiment of the present invention, the plurality of first flow holes 25 include: a plurality of fourth holes 34, a plurality of fifth holes 35 and a plurality of sixth holes 36, the plurality of fourth holes 34 are located on the periphery of the first movable hole 27 and are arranged along the circumferential direction of the first flow member 21, the plurality of fifth holes 35 and the plurality of sixth holes 36 are located on the periphery of the plurality of fourth holes 34, and the plurality of fifth holes 35 and the plurality of sixth holes 36 are arranged along the circumferential direction of the first flow member 21.

[0084] Preferably, there is a first distance between the central axis of the fifth hole 35 and the central axis of the first movable hole 27, and there is a second distance between the central axis of the sixth hole 36 and the central axis of the first movable hole 27, and the first distance is equal to the second distance.

[0085] Preferably, the diameter of the fifth hole 35 is smaller than the diameter of the fourth hole 34 , and the diameter of the fourth hole 34 is smaller than the diameter of the sixth hole 36 .

[0086] When one product is tested for multiple items, the present invention can use one product traceability code to store the data of multiple test items, which is most convenient for data association and ensures that the data of each product's real test is traceable.

[0087] The present invention can conveniently realize the convenient interchange of the cutting process by first performing internal and external air tightness tests, then performing overpressure and underpressure automatic closing performance tests, and then installing the flow meter assembly 2 in the self-closing valve 1, and then performing overcurrent automatic closing performance tests. Such a sequential step setting and qualified coding method are the best way to achieve qualified product logistics and information data circulation.

[0088] The above description is only a preferred embodiment of the present invention, and does not limit the implementation mode and protection scope of the present invention. For those skilled in the art, it should be aware that all solutions obtained by equivalent substitutions and obvious changes made using the description and illustrations of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for detecting a self-closing valve with an over-current cut-off interchangeable structure, characterized in that: include: Step S1: Perform air tightness test on the self-closing valve. If it is qualified, execute step S2; if it is unqualified, exit; Step S2: Perform overpressure and underpressure automatic closing performance detection on the self-closing valve, obtain the detection value of overpressure and underpressure automatic closing performance, and the detection equipment information of overpressure and underpressure automatic closing performance detection on the self-closing valve, if qualified, execute step S3, if unqualified, exit; Step S3: installing a flow-through device assembly in the self-closing valve; Step S4: Perform an over-current automatic closing performance test on the self-closing valve equipped with the over-current device assembly, obtain the test value of the over-current automatic closing performance and the information of the testing equipment used to perform the over-current automatic closing performance test on the self-closing valve, if qualified, execute step S5, if unqualified, remove the over-current device assembly, and return to step S3; Step S5: Generate a traceability code based on the detection value of the overpressure and underpressure automatic closing performance, the detection equipment machine information for detecting the overpressure and underpressure automatic closing performance of the self-closing valve, the detection value of the overcurrent automatic closing performance, and the detection equipment machine information for detecting the overcurrent automatic closing performance of the self-closing valve, and assign it to the self-closing valve.

2. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 1 is characterized in that: The detection equipment for detecting the over-current automatic closing performance of the self-closing valve includes: A test bench, wherein an air source, an adjustment component, a display device and a controller are provided in the test bench, and at least one clamping device is provided on the test bench, wherein the clamping device is used to install a self-closing valve, and the adjustment component includes: an exhaust valve; The self-closing valve is provided with a lifting button and an indicating button, wherein the indicating button is located inside the lifting button. The indicating button is in three states: the lowest position, the middle position and the highest position on the self-closing valve. The indicating button rises together with the lifting button. The lifting button automatically descends by its own weight. When the indicating button is in the lowest position, the lifting button is also at the lowest point within its range of motion. The clamping device comprises: A base, on which a first fixing block is slidably provided and a second fixing block is fixedly provided, the self-closing valve is installed on the base, the air outlet end of the self-closing valve is clamped with the second fixing block, the first fixing block is directly opposite to the air inlet end of the self-closing valve, and is used to supply air to the air inlet end of the self-closing valve, the first fixing block is connected to the air source, and the exhaust valve is located between the first fixing block and the air source; A first cylinder and a second cylinder, wherein the first cylinder and the second cylinder are arranged on the base, the first cylinder is drivingly connected with a lifting manipulator, the lifting manipulator is clamped with the lifting button, the second cylinder is drivingly connected with the first fixing block, the second cylinder pushes the first fixing block, so that the first fixing block is clamped and fixed with the air inlet end of the self-closing valve; The first cylinder, the second cylinder, the display device, and the exhaust valve are respectively connected to the controller signal.

3. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 2 is characterized in that: Step S4 includes: Step S4.1: installing the self-closing valve on the base, docking the air outlet end of the self-closing valve with the second fixing block, and clamping the lifting button of the self-closing valve into the lifting manipulator; Step S4.2: the second cylinder pushes the first fixing block so that the first fixing block is clamped and fixed with the air inlet end of the self-closing valve. At this time, the pull button of the self-closing valve is at the lowest position, and the indicator button of the self-closing valve is at the lowest position; Step S4.3: A gas with a pressure of 2 kPa is introduced into the air inlet end of the self-closing valve, and the first air cylinder drives the lifting manipulator to lift the lifting button of the self-closing valve. The self-closing valve is in an open state, the lifting button of the self-closing valve automatically drops, and the indicator button of the self-closing valve reaches the middle position; Step S4.4: the controller adjusts the exhaust valve so that the pressure difference between the air inlet end of the self-closing valve and the air outlet end of the self-closing valve is 300 Pa; Step S4.5: The controller obtains the first flow value of the self-closing valve and compares it with the set rated flow value. If the first flow value is within the range of the rated flow value, the display device displays a green light, and the self-closing valve is determined to be qualified under the rated flow state, and step S4.6 is executed; if the first flow value is not within the range of the rated flow value, the display device displays a red light, and the self-closing valve is determined to be unqualified, and the process returns to step S3; Step S4.6: The controller automatically and slowly adjusts the exhaust valve to increase the gas flow until the self-closing valve automatically closes and the indicator button is at the lowest position; Step S4.7: The controller obtains the second flow value when the self-closing valve is closed, and compares it with the flow threshold for automatic closing due to excess flow; if the second flow value is within the range of the flow threshold for automatic closing due to excess flow, the display device displays a green light, and the self-closing valve is determined to be qualified, and step S5 is executed; if the second flow value is not within the range of the flow threshold for automatic closing due to excess flow, the display device displays a red light, and the self-closing valve is determined to be unqualified, and the process returns to step S3.

4. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 1, characterized in that: The flow device assembly is arranged in the air inlet end of the self-closing valve, and the flow device assembly comprises: A first flow-through member, the first flow-through member is fixedly connected to the inner wall of the self-closing valve, and the first flow-through member is provided with a plurality of first flow-through holes; A second flow-through member, the second flow-through member is fixedly connected to the first flow-through member, and the second flow-through member is provided with a plurality of second flow-through holes; A blocking member, the blocking member is movably disposed between the first flow-through member and the second flow-through member, and the blocking member cooperates with a plurality of the second flow-through holes for blocking; An elastic member is sleeved on the blocking member, and two ends of the elastic member are respectively against the second flow-through member and the blocking member.

5. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 4 is characterized in that: A first movable hole is provided in the middle of the first flow-through member, a second movable hole is provided in the middle of the second flow-through member, and two ends of the blocking member are slidably matched with the first movable hole and the second movable hole respectively.

6. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 5, characterized in that: The sum of the cross-sectional areas of the plurality of the second flow holes is greater than the sum of the cross-sectional areas of the plurality of the first flow holes.

7. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 5, characterized in that: The plurality of first flow holes include: a plurality of first holes, a plurality of second holes and a plurality of third holes, wherein the plurality of first holes are located on the periphery of the first movable hole and are arranged at equal intervals along the circumferential direction of the first flow member, and the plurality of second holes and the plurality of third holes are located on the periphery of the plurality of first holes, and the plurality of second holes and the plurality of third holes are arranged at intervals along the circumferential direction of the first flow member.

8. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 5, characterized in that: The number of the first flow holes is two, and the two first flow holes are symmetrically arranged on both sides of the first movable hole.

9. The self-closing valve detection method with an over-current cut-off interchangeable structure according to claim 5, characterized in that: The plurality of first flow holes include: a plurality of fourth holes, a plurality of fifth holes and a plurality of sixth holes, the plurality of fourth holes are located on the periphery of the first movable hole and are arranged along the circumferential direction of the first flow member, the plurality of fifth holes and the plurality of sixth holes are located on the periphery of the plurality of fourth holes, and the plurality of fifth holes and the plurality of sixth holes are arranged along the circumferential direction of the first flow member.

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