A pneumatic working mechanism for detecting and debugging a pressure reducing valve

Abstract

The present invention discloses a pneumatic working mechanism for detecting and debugging a pressure reducing valve, comprising: a pneumatic tooling assembly and an air source assembly; a pipe joint III provided on the air source assembly is correspondingly connected to pipe joints II on two pneumatic tooling assemblies via a pipeline provided with a quick-insert tee joint, and a pressure sensor III is provided on the pipeline between the pipe joint III and the quick-insert tee joint for monitoring the working air pressure of the pressure reducing valve under test; a quick-insert joint I and a quick-insert joint II provided on the air source assembly are respectively connected to the quick-insert joints III on the two pneumatic tooling assemblies via pipelines; the pipe joints I of the two pneumatic tooling assemblies are respectively connected to the pressure sensor I and the pressure sensor II via pipelines, and the pressure sensor I and the pressure sensor II are respectively used to monitor the adjusted output pressures of the two pressure reducing valves under test; wherein a pressure reducing valve under test is placed on each pneumatic tooling assembly, the pipe joint II is the air inlet of the working air source of the pressure reducing valve under test, and the pipe joint I is the adjusted air outlet of the pressure reducing valve under test.

Description

Technical Field

[0001] The present invention relates to the technical field of pneumatic transmission and control, and in particular to a pneumatic working mechanism for detecting and debugging a pressure reducing valve. Background Art

[0002] A pressure reducing valve is a valve that reduces the inlet pressure to a pressure value corresponding to a certain required outlet pressure through self-regulation, and relies on the energy of the medium itself to automatically maintain a stable outlet pressure. This valve is widely used in industrial, transportation and other gas line pressure control. The central tire inflation and deflation systems of wheeled vehicles mostly use tire valves to inflate, deflate, and measure tire pressure, ensuring they can operate on highways, gravel, muddy roads, and other surfaces. The deflation function of the tire valve requires a pressure reducing valve to provide a stable air pressure to open the tire's deflation channel. Therefore, the pressure reducing valves used in central tire inflation and deflation systems must be debugged and tested for output pressure to ensure their output pressure meets the product's requirements. During valve debugging and testing, the inlet and outlet ports of the tested pressure reducing valves must be connected and sealed to test the outlet pressure. Furthermore, the inlet of the tested pressure reducing valves must be supplied with varying air source pressures to test the impact of changes in input pressure on the output pressure. Furthermore, the output pressure of the tested pressure reducing valves must be tested under high and low temperature conditions. As the production volume of central tire inflation and deflation systems increases, the workload for testing and debugging pressure reducing valves also increases. Summary of the Invention

[0003] In view of this, the present invention provides a pneumatic working mechanism for detecting and debugging a pressure reducing valve. Through pneumatic control, automatic clamping of the pressure reducing valve under test is realized during debugging, the air inlet and air outlet interfaces of the pressure reducing valve under test are sealed and connected, the air source pressure of the air inlet of the pressure reducing valve under test is adjusted, and its output pressure is tested so that its output pressure meets the requirements of the tire central inflation and deflation system products for the pressure reducing valve output pressure, thereby improving the efficiency of the pressure reducing valve fixing and clamping and reducing the workload; at the same time, different air source working pressures are provided to the pressure reducing valve under test, so that the influence of the change of the air source pressure of the air inlet of the pressure reducing valve under test on the output pressure of the air outlet can be detected.

[0004] The technical solution of the present invention is: a pneumatic working mechanism for detecting and debugging a pressure reducing valve, comprising: a pneumatic tooling assembly, a quick-insert three-way connector, a pressure sensor III, a pressure sensor II, a pressure sensor I and an air source assembly;

[0005] The pipe joint III provided on the air source assembly is connected to the pipe joints II on the two pneumatic tooling assemblies through a pipeline provided with a quick-insert tee joint, and a pressure sensor III is provided on the pipeline between the pipe joint III and the quick-insert tee joint, which is used to monitor the working air pressure of the pressure-reducing valve under test; the quick-insert joint I and quick-insert joint II provided on the air source assembly are respectively connected to the quick-insert joints III on the two pneumatic tooling assemblies through pipelines; the pipe joints I of the two pneumatic tooling assemblies are respectively connected to the pressure sensor I and the pressure sensor II through pipelines, and the pressure sensor I and the pressure sensor II are respectively used to monitor the adjusted output pressures of the two pressure-reducing valves under test; wherein, a pressure-reducing valve under test is placed on each pneumatic tooling assembly, the pipe joint II is the air inlet of the working air source of the pressure-reducing valve under test, and the pipe joint I is the adjusted air outlet of the pressure-reducing valve under test.

[0006] Preferably, the pneumatic tooling assembly further comprises: a lower plate, a middle plate, a high-pressure column assembly, a guide shaft, a spring, a guide sleeve, an upper plate, a fastening shaft, a diaphragm and a fixing ring;

[0007] The upper plate is a rectangular parallelepiped structure, and the two guide sleeves are respectively inserted into the through holes provided at the diagonal ends of the upper plate and fixed; the two guide shafts are respectively inserted into the springs and then installed into the central through holes of the guide sleeves, and are connected to the threaded through holes on the middle plate at the bottom; wherein the guide sleeve is a two-section stepped cylindrical structure with a through hole provided at the central axis; the guide shaft is a stepped cylindrical structure I, and its small end is provided with an external thread;

[0008] The fastening shaft is a stepped cylindrical structure II, the diaphragm is a circular sleeve structure, and the fixing ring is a stepped cylindrical structure III, with a stepped hole in the center, and the large and small ends of the stepped hole correspond to the large and small ends of the fixing ring; the small end of the fastening shaft passes through the central through hole of the diaphragm from one axial end, and the small end of the fixing ring is sleeved on the middle of the fastening shaft from the other end of the diaphragm and presses the diaphragm. At the same time, the fixing ring is tightened by the fixing nut II; the diaphragm is installed in the end face groove set at the large end of the stepped through hole II, and the bolt is fixed to the internal threaded hole of the small end of the fastening shaft through the stepped through hole I in the center of the upper plate; the lower plate with the quick-connect connector III is fixed to the middle plate, and the lower plate presses the outer ring of the diaphragm from the lower end to fix the diaphragm to the middle plate; the threaded end of the high-pressure column assembly passes through the stepped through hole on the middle plate and is fixed to the middle plate; the pipe joint I and the pipe joint II are respectively installed in the threaded holes at the longitudinal ends of the upper plate.

[0009] Preferably, the high-pressure column assembly includes: a fixed column, a pressure column and a nut; the two nuts are self-lockingly fixed to the small end of the pressure column, and at the same time, the small end of the pressure column is screwed into the internal threaded hole of the large end of the fixed column, and the self-locking position of the two nuts on the pressure column is used to determine the depth of the pressure column screwed into the fixed column; wherein, the fixed column is a two-section stepped cylindrical structure I, the small end of which is provided with an external thread and the large end is provided with an internal thread; the pressure column is a two-section stepped cylindrical structure II, the small end of which is provided with an external thread, and an annular groove is provided on the end face of one end connecting the large end and the small end, and an annular gasket is embedded in the annular groove.

[0010] Preferably, the upper plate is provided with a rectangular notch and a through hole at both ends of the transverse direction, and the two rectangular notches are located at a diagonal position relative to each other, and the two through holes are located at another diagonal position relative to each other, and each through hole is provided with a threaded hole on both sides of the radial direction of the upper plate; a rectangular groove is provided on the upper end surface of the upper plate, one end of the rectangular groove is fully open in the longitudinal direction, and the other end is provided with a notch; a stepped through hole I is provided in the center of the upper plate, and the stepped through hole I is provided with small holes on both sides of the radial direction of the upper plate, and the two small holes are respectively connected to the threaded holes provided at both ends of the longitudinal direction of the upper plate.

[0011] Preferably, the middle plate is a rectangular structure, with a stepped through hole II provided in the center, and the stepped through hole II is coaxially connected with the stepped through hole I, and threaded holes are provided on both radial sides of the large end of the stepped through hole II; a two-section stepped through hole is provided at a pair of diagonal positions on the upper end surface of the middle plate, and a threaded through hole is provided at the other diagonal position.

[0012] Preferably, the lower plate is a cylinder with a countersunk hole at the center of one axial end, and a threaded blind hole I at the other axial end. A platform is provided on one side of the outer circumferential surface of the lower plate, and a threaded blind hole II is opened on the platform along the radial direction of the lower plate. The threaded blind hole II is connected with the countersunk hole in the center of the lower plate, and mounting holes are respectively provided at corresponding positions on both sides of the radial direction of the center countersunk hole of the lower plate, and the two mounting holes are coaxial with the threaded holes on both sides of the radial direction of the stepped through hole II of the middle plate.

[0013] Preferably, the gas source assembly further comprises: a two-position three-way solenoid valve I, a two-position three-way solenoid valve II, a pressure reducing valve II, a pressure reducing valve I and a valve plate;

[0014] The valve plate is a rectangular parallelepiped structure, and two countersunk holes are provided in the horizontal middle part of its upper surface for installing the pressure reducing valve II and the pressure reducing valve I; a blind hole is provided on the valve plate on the radial side of each countersunk hole, and the blind hole is communicated with the air inlet of the corresponding pressure reducing valve, and the two blind holes are communicated with the air channel running longitudinally through the inside of the valve plate, one end of the air channel is blocked, and the other end is connected to the air source; a two-position three-way solenoid valve I and a two-position three-way solenoid valve II are installed on the lower surface of the valve plate, and a through hole is provided on the radial other side of the two countersunk holes, which serves as the outlet for adjusting the air pressure of the corresponding pressure reducing valve and leads to the normally closed port of the two-position three-way solenoid valve provided on the lower surface of the valve plate ... is provided inside the valve plate Air passage I of solenoid valve II is communicated with the air path of quick-connect connector I and quick-connect connector II arranged on the side of the valve plate. The two-position three-way solenoid valve II controls the output adjustment air pressure of pressure-reducing valve II and the air path of quick-connect connector I and quick-connect connector II. The air pressure of the two pneumatic tooling assemblies clamping the pressure-reducing valve under test can be changed by adjusting the pressure-reducing valve II. The valve plate is also provided with air passage II of two-position three-way solenoid valve I. Air passage II is communicated with the air path of pipe connector III arranged on the side of the valve plate. The two-position three-way solenoid valve I controls the output adjustment air pressure of pressure-reducing valve I and the air path of pipe connector III. Adjusting the pressure-reducing valve I can control the working air source pressure of the pressure-reducing valve under test.

[0015] Preferably, it also includes: a button switch II and a button switch I, wherein the button switch II and the button switch I are electrically connected to the two-position three-way solenoid valve I and the two-position three-way solenoid valve II in the air source assembly respectively, and are used to control the on and off of the two-position three-way solenoid valve I and the two-position three-way solenoid valve II.

[0016] Preferably, it further comprises: a stop valve, wherein a stop valve is installed between the quick-connect connector I and the quick-connect connector III, and between the quick-connect connector II and the quick-connect connector III.

[0017] Preferably, it also includes: a digital pressure gauge II, a digital pressure gauge III and a digital pressure gauge I; the digital pressure gauge III is electrically connected to the pressure sensor III, the digital pressure gauge I is electrically connected to the pressure sensor I, the digital pressure gauge II is electrically connected to the pressure sensor II, the digital pressure gauge III is used to display the working air pressure of the air inlet of the tested pressure reducing valve monitored by the pressure sensor III, and the digital pressure gauge I and the digital pressure gauge II are respectively used to display the adjusted output pressures of the two tested pressure reducing valves.

[0018] Beneficial effects:

[0019] 1. The pneumatic working mechanism of the present invention can realize pneumatic control of the clamping of the pressure reducing valve under test through the air path connection between the pneumatic tooling assembly and the air source assembly, fix and clamp a pressure reducing valve connected with a flat interface, realize the sealed connection of the air path interface of the pressure reducing valve under test, provide the air source working pressure required by the pressure reducing valve under test, complete the debugging and testing of the output pressure of the pressure reducing valve under test under specified air pressure conditions, and test the output pressure of the pressure reducing valve under test under different working pressures.

[0020] 2. The specific structural design of the pneumatic tooling assembly in the present invention can effectively ensure that after the air pressure adjusted by the air source assembly enters the pneumatic tooling assembly, the pressure reducing valve under test is automatically clamped through pneumatic control, the air inlet and air outlet interfaces of the pressure reducing valve under test are sealed and connected, the air source pressure of the air inlet of the pressure reducing valve under test is adjusted, and its output pressure is tested so that its output pressure meets the requirements of the tire central inflation and deflation system product for the pressure reducing valve output pressure, thereby improving the efficiency of the pressure reducing valve fixing and clamping and reducing the workload.

[0021] 3. The ingenuity of the high-pressure column assembly design in the present invention is that the depth to which the pressure column is screwed into the fixed column can be arbitrarily adjusted by two nuts arranged opposite to each other, thereby adaptively achieving pneumatic compression control for different pressure reducing valves under test.

[0022] 4. The design of the upper plate in the present invention can not only cooperate with the middle plate to install the high-pressure column assembly, but also facilitate the clever installation of the guide sleeve, guide shaft, spring and diaphragm, thereby facilitating the pneumatic control of the pressure reducing valve under test. At the same time, the design of the upper plate is also conducive to the installation of the pressure reducing valve under test.

[0023] 5. The pneumatic working mechanism of the present invention controls the air circuit through a two-position three-way solenoid valve, so that the pneumatic tooling assembly can fix and clamp a pressure-reducing valve under test connected to a flat interface by controlling the movement of its diaphragm, thereby achieving a sealed connection of the pressure-reducing valve air circuit interface, providing the air source working pressure required by the pressure-reducing valve under test, and completing the debugging and testing of the pressure-reducing valve's output pressure under specified air pressure conditions, thereby meeting the production, testing and debugging requirements of large-scale tire central inflation and deflation system products.

[0024] 6. The pneumatic working mechanism of the present invention controls the air circuit of the two-position three-way solenoid valve in the air source assembly through a push button switch, utilizes pneumatic control to activate the pneumatic tooling assembly, realizes automatic clamping of the pressure reducing valve under test, realizes the supply of different working air pressures to the pressure reducing valve under test, and simultaneously completes the output performance test of the two pressure reducing valves under test, thereby improving the test efficiency. It has the characteristics of simple structure and easy use. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1a This is a three-dimensional structural diagram from one perspective of the pneumatic working mechanism for detecting and debugging the pressure reducing valve of the present invention.

[0026] Figure 1b This is a three-dimensional structural schematic diagram from another perspective of the pneumatic working mechanism for detecting and debugging the pressure reducing valve of the present invention.

[0027] Figure 2 Schematic diagram of the structure of the gas source assembly in the present invention.

[0028] Figure 3 It is a structural schematic diagram of the pneumatic tooling assembly in the present invention.

[0029] Figure 4 It is a cross-sectional view of the pneumatic tooling assembly of the present invention.

[0030] Figure 5 It is a cross-sectional view of the high-pressure column assembly of the present invention.

[0031] Figure 6a It is a schematic diagram of the three-dimensional structure of the valve plate in the present invention.

[0032] Figure 6b It is the front view of the valve plate in the present invention.

[0033] Figure 6c It is an AA cross-sectional view of the valve plate in the present invention.

[0034] Figure 7a It is a schematic diagram of the three-dimensional structure of the upper plate in the present invention.

[0035] Figure 7b It is a left view of the upper plate in the present invention.

[0036] Figure 7c It is a top view of the upper plate in the present invention.

[0037] Figure 7d It is an AA cross-sectional view of the upper plate in the present invention.

[0038] Figure 8a Schematic diagram of the three-dimensional structure of the bottom plate of the present invention.

[0039] Figure 8b It is a bottom view of the bottom plate of the present invention.

[0040] Figure 8c It is a cross-sectional view of the bottom plate of the present invention.

[0041] Figure 9a It is a schematic diagram of the three-dimensional structure of the middle plate in the present invention.

[0042] Figure 9b It is a top view of the middle plate in the present invention.

[0043] Figure 9c It is a BB cross-sectional view of the middle plate in the present invention.

[0044] Figure 10a It is a schematic diagram of the three-dimensional structure of the guide sleeve in the present invention.

[0045] Figure 10b It is a cross-sectional view of the guide sleeve in the present invention.

[0046] Figure 11 It is a schematic diagram of the three-dimensional structure of the guide shaft in the present invention.

[0047] Figure 12aIt is a schematic diagram of the three-dimensional structure of the fastening shaft in the present invention.

[0048] Figure 12b It is a cross-sectional view of the fastening shaft in the present invention.

[0049] Figure 13a Schematic diagram of the three-dimensional structure of the diaphragm in the present invention.

[0050] Figure 13b It is a cross-sectional view of the diaphragm in the present invention.

[0051] Figure 14a It is a schematic diagram of the three-dimensional structure of the fixing ring in the present invention.

[0052] Figure 14b It is a cross-sectional view of the fixing ring in the present invention.

[0053] Figure 15 It is a schematic diagram of the three-dimensional structure of the fixing nut in the present invention.

[0054] Figure 16a It is a schematic diagram of the three-dimensional structure of the fixed column in the present invention.

[0055] Figure 16b It is a cross-sectional view of the fixing column in the present invention.

[0056] Figure 16c This is an AA cross-sectional view of the fixing column in the present invention.

[0057] Figure 17a It is a schematic diagram of the three-dimensional structure of the medium-pressure column of the present invention.

[0058] Figure 17b It is a cross-sectional view of the medium-pressure column of the present invention.

[0059] Figure 18 Schematic diagram of the structure of the pressure reducing valve to be tested in the present invention.

[0060] Figure 19 This is a schematic diagram of the installation of the pressure reducing valve under test and the pneumatic tooling assembly in the present invention.

[0061] Among them, 1. Pneumatic tooling assembly; 2. Quick-connect three-way connector; 3. Digital pressure gauge II; 4. Push button switch II; 5. Push button switch I; 6. Digital pressure gauge III; 7. Digital pressure gauge I; 8. Pressure sensor III; 9. Pressure sensor II; 10. Pressure sensor I; 11. Stop valve; 12. Air source assembly; 13. Box; 14. Two-position three-way solenoid valve I; 15. Two-position three-way solenoid valve II; 16. Quick-connect connector I; 17. Pressure reducing valve II; 18. Pressure reducing valve I; 19. Pipe connector III; 20. Quick-connect Head II; 21. Valve plate; 22. Lower plate; 23. Middle plate; 24. Pipe joint I; 25. High-pressure column assembly; 26. Guide shaft; 27. Spring; 28. Guide sleeve; 29. ​​Upper plate; 30. Pipe joint II; 31. Quick connector III; 32. Fixing nut I; 33. Fastening shaft; 34. Diaphragm; 35. Fixing nut II; 36. Washer; 37. Bolt; 38. Screw; 39. Retaining ring; 40. Fixing column; 41. Pressure column; 42. Nut; 43. Air inlet; 44. Air outlet; 45. O-ring. DETAILED DESCRIPTION

[0062] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0063] Example 1:

[0064] This embodiment provides a pneumatic working mechanism for detecting and debugging a pressure reducing valve. Through pneumatic control, the pressure reducing valve under test is automatically clamped during debugging, the air inlet and air outlet interfaces of the pressure reducing valve under test are sealed, the air source pressure of the air inlet of the pressure reducing valve under test is adjusted, and its output pressure change is tested so that its output pressure meets the requirements of the tire central inflation and deflation system products for the pressure reducing valve output pressure, thereby improving the efficiency of the pressure reducing valve fixing and clamping and reducing the workload. At the same time, different air source working pressures are provided to the pressure reducing valve under test, so that the influence of the change of the air source pressure of the air inlet of the pressure reducing valve under test on the output pressure of its outlet can be detected.

[0065] like Figure 1a and 1b As shown, the pneumatic working mechanism for testing and debugging the pressure reducing valve includes: a pneumatic tooling assembly 1, a quick-insert tee connector 2, a digital pressure gauge II 3, a push button switch II 4, a push button switch I 5, a digital pressure gauge III 6, a digital pressure gauge I 7, a pressure sensor III 8, a pressure sensor II 9, a pressure sensor I 10, a stop valve 11, an air source assembly 12, and a box 13;

[0066] The gas source assembly 12 is arranged in the box 13, and the pipe joint Ⅲ19 on the gas source assembly 12 is connected to the pipe joint Ⅱ30 on the two pneumatic tooling assemblies 1 through a pipeline provided with a quick-insert tee joint 2, and a pressure sensor Ⅲ8 is provided on the pipeline between the pipe joint Ⅲ19 and the quick-insert tee joint 2. The pressure sensor Ⅲ8 is electrically connected to the digital pressure gauge Ⅲ6, and the digital pressure gauge Ⅲ6 is used to display the working air pressure of the air inlet of the measured pressure reducing valve monitored by the pressure sensor Ⅲ8; the quick-insert joint Ⅰ16 and the quick-insert joint Ⅱ20 on the gas source assembly 12 are respectively connected to the quick-insert joint Ⅲ31 of the two pneumatic tooling assemblies 1 through pipelines, and are respectively installed on the connected pipelines. A stop valve 11 is provided for adjusting the amount of air passing through the pipeline, thereby controlling the clamping degree of the pressure reducing valve under test. The pipe joints I24 of the two pneumatic tooling assemblies 1 are respectively connected to a pressure sensor I10 and a pressure sensor II9 through pipelines. The pressure sensor I10 is electrically connected to a digital pressure gauge I7, and the pressure sensor II9 is ​​electrically connected to a digital pressure gauge II3. The pressure sensors I10 and II9 are respectively used to detect the output pressures of the two pressure reducing valves under test. The digital pressure gauges I7 and II3 are respectively used to display the output pressures of the two pressure reducing valves under test. A pressure reducing valve under test is placed on each pneumatic tooling assembly 1.

[0067] Push button switch II4 and push button switch I5 are both arranged on the box body 13 and are electrically connected to the two-position three-way solenoid valve I14 and the two-position three-way solenoid valve II15 in the air source assembly 12 respectively, and are used to control the air circuit opening and closing of the two-position three-way solenoid valve I14 and the two-position three-way solenoid valve II15.

[0068] In this embodiment, Figure 3 and 4 As shown, the pneumatic tooling assembly 1 includes: a lower plate 22, a middle plate 23, a pipe joint I 24, a high-pressure column assembly 25, a guide shaft 26, a spring 27, a guide sleeve 28, an upper plate 29, a pipe joint II 30, a quick-connect joint III 31, a fixing nut I 32, a fastening shaft 33, a diaphragm 34, a fixing nut II 35, a washer 36, a bolt 37, a screw 38 and a fixing ring 39;

[0069] The two guide sleeves 28 are respectively inserted into the through holes at the diagonal ends of the upper plate 29 and fixed with screws 38; the two guide shafts 26 are respectively inserted into the springs 27 and then installed into the central through holes of the guide sleeves 28, and are threadedly connected to the threaded through holes on the middle plate 23 at the bottom;

[0070] The small end of the fastening shaft 33 passes through the central through hole of the diaphragm 34 from one axial end thereof, and the small end of the fixing ring 39 is sleeved on the middle part of the fastening shaft 33 from the other end of the diaphragm 34 and presses the diaphragm 34. At the same time, the fixing ring 39 is tightened by the fixing nut II 35, thereby further tightening the diaphragm 34; the diaphragm 34 is installed in the stepped through hole II in the center of the middle plate 23, and the bolt 37 passes through the stepped through hole I in the center of the upper plate 29 and is threadedly connected to the internal threaded hole of the small end of the fastening shaft 33 to achieve fixation; the lower plate 22 equipped with the quick-insert connector III 31 is fixed to the middle plate 23 by screws, and the lower plate 22 presses the outer ring of the diaphragm 34 from the lower end to fix the diaphragm 34 on the middle plate 23, and the high-pressure column assembly 25 is fixed. The threaded end passes through the stepped through hole on the middle plate 23, and the high-pressure column assembly 25 is fixed to the middle plate 23 by the fixing nut I 32; the pipe joint I 24 and the pipe joint II 30 are respectively installed in the threaded holes at the longitudinal ends of the upper plate 29 after the washers 36 are put on. The pipe joint II 30 is the air inlet of the working air source of the pressure reducing valve to be tested, and the pipe joint I 24 is the adjusted air outlet of the pressure reducing valve to be tested. When air is ventilated from the quick-connect joint III 31, the fastening shaft 33 is pushed upward by the action of the air pressure. Since the fastening shaft 33 and the upper plate 29 are fixed by bolts 37, the upper plate 29 moves upward accordingly, so that the upper plate 29 moves upward along the axial compression spring 27 of the guide shaft 26 through the guide sleeve 28 installed and fixed thereon.

[0071] In this embodiment, Figure 5 As shown, the high-pressure column assembly 25 includes: a fixed column 40, a pressure column 41 and a nut 42; the two nuts 42 are arranged opposite each other and are sleeved on the small end of the pressure column 41 (that is, the two nuts 42 are self-lockingly fixed to the small end of the pressure column 41). At the same time, the small end of the pressure column 41 is screwed into the internal threaded hole of the large end of the fixed column 40, and the self-locking position of the two nuts 42 on the pressure column 41 is used to determine the depth of the pressure column 41 being screwed into the fixed column 40; wherein, as Figure 16a 、 16b As shown in FIG16c, the fixing column 40 is a two-stage stepped cylindrical structure I, with an external thread on the small end and an internal thread on the large end, and a platform is provided on the radially opposite outer circumferential surface of the axial middle of the large end (for use when tightening); Figure 17a and 17b As shown, the pressure column 41 is a two-section stepped cylindrical structure II, the small end of which is provided with an external thread, and the end surface of one end where the large end and the small end are connected is provided with an annular groove, in which an annular gasket (which is made of polytetrafluoroethylene and is used to compress the pressure reducing valve under test) is embedded.

[0072] In this embodiment, Figure 7a 、 7bAs shown in 7c and 7d, the upper plate 29 is a rectangular parallelepiped structure, and its opposite ends (let them be the lateral ends) are provided with a rectangular parallelepiped notch and a through hole (for installing the guide sleeve 28), and the two rectangular notches are located at a diagonal position relative to each other, and the two through holes are located at another diagonal position relative to each other, and each through hole is provided with a threaded hole on both sides of the radial direction of the upper plate 29 (for fixing the guide sleeve 28 by screws); a rectangular groove is provided on the upper end surface of the upper plate 29, one end of the rectangular groove is fully open in the longitudinal direction and the other end is provided with a notch, and the rectangular groove is used to place the end face sealing surface of the pressure reducing valve to be tested; a stepped through hole I is provided in the center of the upper plate 29 (at the intersection of the longitudinal and transverse directions) (which is formed by three sections of cylindrical through holes, and the aperture gradually increases from one axial end to the other end); small holes are provided on both sides of the stepped through hole I in the center of the upper plate 29 along the radial direction of the upper plate 29, and these two small holes are respectively connected to the threaded holes provided at the longitudinal ends of the upper plate 29;

[0073] In this embodiment, Figure 9a 、 9b As shown in 9c, the middle plate 23 is a rectangular parallelepiped structure, with a stepped through hole II (formed by three sections of cylindrical through holes, and the aperture gradually increases from one axial end to the other) provided in its center (at the intersection of the longitudinal and transverse directions), an end face groove provided at its large end (the outer edge of the diaphragm 34 is inserted into the end face groove of the stepped through hole II in the center of the middle plate 23), and the stepped through hole II is coaxially connected to the stepped through hole I, and threaded holes are provided on both radial sides of the large end of the stepped through hole II; a pair of diagonal positions on the upper end surface of the middle plate 23 are respectively provided with a two-section stepped through hole (for installing the high-pressure column assembly 25), and a threaded through hole is provided at the other diagonal position (for installing the guide shaft 26);

[0074] In this embodiment, Figure 10a and 10b As shown, the guide sleeve 28 is a two-section stepped cylindrical structure, with a through hole provided at the central axis and stepped through holes III (which are formed by a tapered hole and a cylindrical hole passing through, with the tapered hole at the large end and the cylindrical hole at the small end) provided on two opposite radial sides of the large end.

[0075] In this embodiment, Figure 11 As shown, the guide shaft 26 is a stepped cylindrical structure I (which is formed by three sections of a cylinder, and the outer diameter gradually increases from one axial end to the other end), with a strip groove provided on the end surface of the large end and an external thread provided on the small end;

[0076] In this embodiment, Figure 12a and 12b As shown, the fastening shaft 33 is a stepped cylindrical structure II (which is formed by three sections of a cylinder, and the outer diameter gradually increases from one axial end to the other end), with an arc-shaped groove at the center of the large end, an external thread in the middle, and an internal thread hole at the small end;

[0077] In this embodiment, Figure 13a and 13b As shown, the diaphragm 34 is a circular sleeve structure with a through hole in the center, annular bosses are provided at both ends of the axial direction, and an annular groove is provided on the annular boss at one end, so that the cross section of the diaphragm 34 along the axial direction is S-shaped;

[0078] In this embodiment, Figure 14a and 14b As shown, the fixing ring 39 is a stepped cylindrical structure III (which is formed by two cylindrical sections, and the outer diameter gradually increases from one axial end to the other end), with a stepped hole provided in the center, and the large end and small end of the stepped hole correspond to the large end and small end of the fixing ring 39;

[0079] In this embodiment, Figure 15 As shown, four mutually symmetrical platforms are provided on the outer circumference of the fixing nut II 35, which is convenient for use when tightening with a wrench;

[0080] In this embodiment, Figure 8a 、 8b As shown in 8c, the lower plate 22 is a cylinder with a countersunk hole at the center of one axial end, and a threaded blind hole I at the other axial end. A platform is provided on one side of the outer circumferential surface of the lower plate 22, and a threaded blind hole II (for installing a quick-connect connector III31) is opened on the platform along the radial direction of the lower plate 22. The threaded blind hole II is connected to the countersunk hole at the center of the lower plate 22, and mounting holes are respectively provided at corresponding positions on both sides of the radial direction of the central countersunk hole of the lower plate 22. These two mounting holes are coaxial with the threaded holes on both sides of the radial direction of the stepped through hole II of the middle plate 23, so as to facilitate fixing the lower plate 22 and the middle plate 23 by screws.

[0081] In this embodiment, Figure 2 As shown, the gas source assembly 12 includes: a two-position three-way solenoid valve I 14, a two-position three-way solenoid valve II 15, a quick-connect connector I 16, a pressure reducing valve II 17, a pressure reducing valve I 18, a pipe connector III 19, a quick-connect connector II 20 and a valve plate 21;

[0082] like Figure 6a 、 6bAs shown in Figure 6c, the valve plate 21 is a rectangular parallelepiped structure, and two countersunk holes are provided in the horizontal middle of its upper surface for installing the pressure reducing valve II17 and the pressure reducing valve I18. Four symmetrical threaded holes are provided around each countersunk hole to facilitate fixing the pressure reducing valve II17 and the pressure reducing valve I18 to the corresponding countersunk holes by screws; a blind hole is provided on the valve plate 21 on one radial side of each countersunk hole, and the blind hole is communicated with the air inlet of the corresponding pressure reducing valve (pressure reducing valve II17 or pressure reducing valve I18), and the two blind holes are longitudinally connected to the interior of the valve plate 21. The through-holes are connected to the air passage III, one end of which is blocked and the other end is connected to the air source; the lower surface of the valve plate 21 is provided with eight threaded holes, which are used to install the two-position three-way solenoid valve I14 and the two-position three-way solenoid valve II15 respectively. There is a through hole on the other side of the radial direction of the two countersunk holes, which serves as the outlet of the corresponding pressure reducing valve (pressure reducing valve II17 or pressure reducing valve I18) to adjust the air pressure and leads to the normally closed port of the two-position three-way solenoid valve provided on the lower surface of the valve plate 21 (the two-position three-way solenoid valve I14 corresponds to the pressure reducing valve I18, and the two-position three-way solenoid valve I18 corresponds to the pressure reducing valve I17). The valve plate 21 is provided with an air passage I of a two-position three-way solenoid valve II15, which is communicated with the air passage of the quick-connect connector I16 and the quick-connect connector II20 provided on the side of the valve plate 21. The two-position three-way solenoid valve II15 controls the output of the pressure reducing valve II17 to adjust the air pressure and the air passage of the quick-connect connector I16 and the quick-connect connector II20. By adjusting the pressure reducing valve II17, the air pressure of the clamping action of the two pneumatic tooling assemblies 1 can be changed. The valve plate 21 is also provided with a two-position three-way solenoid valve II15. The air passage II of the magnetic valve I14 is connected to the air circuit of the pipe joint III19 arranged on the side of the valve plate 21. The two-position three-way solenoid valve I14 controls the output of the pressure reducing valve I18 to adjust the air pressure and the air circuit of the pipe joint III19; the pipe joint III19 on the air source assembly 12 is connected to one interface of the quick-insert three-way connector 2 through a pipeline, and the other two interfaces of the quick-insert three-way connector 2 are correspondingly connected to the pipe joints II30 on the two pneumatic tooling assemblies 1; adjusting the pressure reducing valve I18 can control the working air source pressure of the pressure reducing valve being tested.

[0083] The working principle of the pneumatic working mechanism of the pressure reducing valve detection and debugging is:

[0084] like Figure 19 As shown, the pressure reducing valve to be tested (such as Figure 18As shown in FIG. 1 , the air inlet 43 and the air outlet 44 with the O-ring 45 are connected to the small holes on the upper plate 29 of the pneumatic tooling assembly 1. The self-locking position of the nuts 42 in the two high-pressure column assemblies 25 is adjusted respectively to ensure that when the upper end of the rotating pressure column 41 is rotated and the pressure column 41 is rotated downward on the internal thread of the fixed column 40 to position, the end face of the annular gasket in the annular groove of the pressure column 41 is at the same height from the upper end face of the valve seat of the pressure reducing valve to be tested. Press the button switch I5 to energize the two-position three-way solenoid valve II15. The air pressure adjusted by the pressure reducing valve II 17 passes through the quick connector I 16 and the quick connector II 20, and enters the corresponding quick connector III 31. The gas enters the cavity of the lower plate 22, pushing the diaphragm 34 to drive the fastening shaft 33 to move upward, thereby pushing the upper plate 29 to move upward along the guide shaft 26 and compressing the spring 27. The pressure reducing valve to be tested placed on the upper plate 29 moves upward, and the pressure column 41 of the high-pressure column assembly 25 presses the pressure reducing valve to be tested fixed on the upper plate 29. The air inlet 43 and the air outlet 44 of the pressure reducing valve to be tested are connected to the upper plate 29 of the pneumatic tooling assembly 1. The small holes on the upper plate 29 are connected and sealed; press the button switch Ⅱ4 to energize the two-position three-way solenoid valve Ⅰ14, and the air pressure adjusted by the pressure reducing valve Ⅰ18 enters the pipe joints Ⅱ30 of the two pneumatic tooling assemblies 1 through the pipe joint Ⅲ19 and the quick-insert three-way joint 2, and provides working air pressure for the pressure reducing valve to be tested placed on the upper plate 29 through the small hole in the upper plate 29. The output air pressure adjusted by the pressure reducing valve to be tested is transmitted to the corresponding pressure sensor (pressure sensor Ⅰ10 or pressure sensor Ⅱ9) through the pipe joints Ⅰ24 of the two pneumatic tooling assemblies 1. The pressure sensor The sensor transmits the pressure signal to the corresponding digital pressure gauge (digital pressure gauge I7 or digital pressure gauge II3), and the digital pressure gauge displays the value of the output air pressure of the pressure reducing valve under test; press the button switch II4 to cut off the power to the two-position three-way solenoid valve I14 and exhaust the air, and stop providing working air pressure to the pressure reducing valve under test; press the button switch I5 to cut off the power to the two-position three-way solenoid valve II15 and exhaust the air, and there is no air pressure in the cavity of the lower plate 22. The upper plate 29 moves down and back to its position under the rebound action of the spring 27, and the pressure column 41 of the high-pressure column assembly 25 of the pneumatic tooling assembly 1 releases the pressure reducing valve under test.

[0085] Example 2:

[0086] On the basis of Example 1, the pneumatic tooling assembly 1 can be disassembled, and the lengths of the connecting pipes of the quick-connect connector III 31, the pipe connector II 30, and the pipe connector 24 in the pneumatic tooling assembly 1 can be changed. The pneumatic tooling assembly 1 can be placed in a temperature and humidity control box or installed on an impact and vibration test bench to perform high and low temperature tests or different humidity tests or impact and vibration tests. The output performance stability of the pressure reducing valve under these test conditions can be detected to meet the detection test requirements of the pressure reducing valve under test.

[0087] Example 3:

[0088] By changing the end face size of the upper plate 29 on which the pressure reducing valve to be tested is placed and the position distance of the air holes in Example 1 or Example 2, it can be used to detect the output pressure of pressure reducing valves to be tested with end face seals of other sizes.

[0089] Example 4:

[0090] The output pressure value of the pressure reducing valve I 18 in Example 1 was adjusted to detect changes in the output pressure of the pressure reducing valve under different working pressures.

[0091] In summary, the above are only preferred embodiments of the present invention and are not intended to limit the scope of protection of 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 pneumatic working mechanism for detecting and debugging a pressure reducing valve, characterized in that: include: Pneumatic tooling assembly (1), quick-insert three-way connector (2), pressure sensor III (8), pressure sensor II (9), pressure sensor I (10) and air source assembly (12); The pipe joint III (19) provided on the gas source assembly (12) is connected to the pipe joints II (30) on the two pneumatic tooling assemblies (1) through a pipeline provided with a quick-insert three-way joint (2), and a pressure sensor III (8) is provided on the pipeline between the pipe joint III (19) and the quick-insert three-way joint (2) for monitoring the working air pressure of the pressure reducing valve under test; the quick-insert joint I (16) and the quick-insert joint II (20) provided on the gas source assembly (12) are connected to the quick-insert joints on the two pneumatic tooling assemblies (1) through pipelines respectively. The two pneumatic tooling assemblies (1) are connected to the pipe joints I (24) through pipelines with the pressure sensor I (10) and the pressure sensor II (9), respectively. The pressure sensor I (10) and the pressure sensor II (9) are used to monitor the output pressures of the two pressure reducing valves under test. Each pneumatic tooling assembly (1) is provided with a pressure reducing valve under test. The pipe joint II (30) is the air inlet of the working air source of the pressure reducing valve under test, and the pipe joint I (24) is the adjusted air outlet of the pressure reducing valve under test. The pneumatic tooling assembly (1) further comprises: a lower plate (22), a middle plate (23), a high-pressure column assembly (25), a guide shaft (26), a spring (27), a guide sleeve (28), an upper plate (29), a fastening shaft (33), a diaphragm (34) and a fixing ring (39); The upper plate (29) is a rectangular parallelepiped structure, and both ends of the upper plate (29) are provided with a rectangular parallelepiped notch and a through hole, and the two rectangular parallelepiped notches are located at a diagonal position relative to each other, and the two through holes are located at another diagonal position relative to each other, and each through hole is provided with a threaded hole on both sides of the radial direction of the longitudinal direction of the upper plate (29); a rectangular groove is provided on the upper end surface of the upper plate (29), and one end of the rectangular groove is fully open in the longitudinal direction and the other end is provided with a notch; a stepped through hole I is provided in the center of the upper plate (29), and the stepped through hole I is provided with small holes on both sides of the radial direction of the longitudinal direction of the upper plate (29), and the two small holes are respectively connected to the threaded holes provided at both ends of the longitudinal direction of the upper plate (29); The middle plate (23) is a rectangular parallelepiped structure, with a stepped through hole II provided at its center, and the stepped through hole II is coaxially connected to the stepped through hole I, and threaded holes are provided on both radial sides of the large end of the stepped through hole II; a stepped through hole with two sections is provided at a pair of corner positions on the upper end surface of the middle plate (23), and a threaded through hole is provided at another pair of corner positions; The two guide sleeves (28) are respectively inserted into the through holes provided at the diagonal positions of the two transverse ends of the upper plate (29) and fixed; the two guide shafts (26) are respectively inserted into the springs (27) and then installed into the central through holes of the guide sleeves (28), and are connected to the threaded through holes on the middle plate (23) at the bottom; wherein the guide sleeve (28) is a two-section stepped cylindrical structure, and a through hole is provided at the central axis thereof; the guide shaft (26) is a stepped cylindrical structure I, and an external thread is provided at the small end thereof; The fastening shaft (33) is a stepped cylindrical structure II, the diaphragm (34) is a circular sleeve structure, and the fixing ring (39) is a stepped cylindrical structure III, the center of which is provided with a stepped hole, and the large end and small end of the stepped hole correspond to the large end and small end of the fixing ring (39); the small end of the fastening shaft (33) passes through the central through hole of the diaphragm (34) from one axial end, and the small end of the fixing ring (39) is sleeved on the middle part of the fastening shaft (33) from the other end of the diaphragm (34) and presses the diaphragm (34). At the same time, the fixing ring (39) is pressed by the fixing nut II (35); the diaphragm (34) is installed in the stepped through hole In the end face groove set at the large end of Ⅱ, the bolt (37) passes through the stepped through hole Ⅰ in the center of the upper plate (29) and is fixed to the internal threaded hole at the small end of the fastening shaft (33); the lower plate (22) equipped with the quick-connect joint Ⅲ (31) is fixed to the middle plate (23), and the lower plate (22) presses the outer ring of the diaphragm (34) from the lower end to fix the diaphragm (34) on the middle plate (23); the threaded end of the high-pressure column assembly (25) passes through the stepped through hole on the middle plate (23) and is fixed to the middle plate (23); the pipe joint Ⅰ (24) and the pipe joint Ⅱ (30) are respectively installed in the threaded holes at the longitudinal ends of the upper plate (29).

2. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to claim 1, characterized in that: The high-pressure column assembly (25) comprises: a fixed column (40), a pressure column (41) and a nut (42); two nuts (42) are self-lockingly fixed to the small end of the pressure column (41), and at the same time, the small end of the pressure column (41) is screwed into the internal threaded hole of the large end of the fixed column (40), and the self-locking position of the two nuts (42) on the pressure column (41) is used to determine the depth of the pressure column (41) being screwed into the fixed column (40); wherein, the fixed column (40) is a two-section stepped cylindrical structure I, the small end of which is provided with an external thread and the large end is provided with an internal thread; the pressure column (41) is a two-section stepped cylindrical structure II, the small end of which is provided with an external thread, and an annular groove is provided on the end face where the large end and the small end are connected, and an annular gasket is embedded in the annular groove.

3. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to claim 2, characterized in that: The lower plate (22) is a cylinder with a countersunk hole at the center of one axial end, and a threaded blind hole I at the other axial end. A platform is provided on one side of the outer circumferential surface of the lower plate (22), and a threaded blind hole II is opened on the platform along the radial direction of the lower plate (22). The threaded blind hole II is connected to the countersunk hole at the center of the lower plate (22). Mounting holes are respectively provided at corresponding positions on both sides of the radial direction of the center countersunk hole of the lower plate (22), and the two mounting holes are coaxial with the threaded holes on both sides of the radial direction of the stepped through hole II of the middle plate (23).

4. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to claim 1, characterized in that: The gas source assembly (12) further comprises: a two-position three-way solenoid valve I (14), a two-position three-way solenoid valve II (15), a pressure reducing valve II (17), a pressure reducing valve I (18) and a valve plate (21); The valve plate (21) is a rectangular parallelepiped structure, and two countersunk holes are provided in the transverse middle of its upper surface for installing the pressure reducing valve II (17) and the pressure reducing valve I (18); a blind hole is provided on the valve plate (21) on the radial side of each countersunk hole, and the blind hole is communicated with the air inlet of the corresponding pressure reducing valve, and both blind holes are communicated with the air channel that runs through the valve plate (21) in the longitudinal direction, one end of the air channel is blocked, and the other end is connected to the air source; a two-position three-way solenoid valve I (14) and a two-position three-way solenoid valve II (15) are installed on the lower surface of the valve plate (21), and a through hole is provided on the radial other side of the two countersunk holes, which serves as the outlet for adjusting the air pressure of the corresponding pressure reducing valve and leads to the normally closed port of the two-position three-way solenoid valve provided on the lower surface of the valve plate (21); the valve plate (21) is provided with an air channel I of the two-position three-way solenoid valve II (15), and the air channel I of the two-position three-way solenoid valve II (15) is provided inside the valve plate (21). The air passage I is communicated with the air passage of the quick-connection joint I (16) and the quick-connection joint II (20) arranged on the side of the valve plate (21); the two-position three-way solenoid valve II (15) controls the output adjustment air pressure of the pressure reducing valve II (17) and the air passage of the quick-connection joint I (16) and the quick-connection joint II (20); by adjusting the pressure reducing valve II (17), the air pressure of the two pneumatic tooling assemblies (1) clamping the pressure reducing valve to be tested can be changed; the valve plate (21) is also provided with an air passage II of the two-position three-way solenoid valve I (14), the air passage II is communicated with the air passage of the pipe joint III (19) arranged on the side of the valve plate (21); the two-position three-way solenoid valve I (14) controls the output adjustment air pressure of the pressure reducing valve I (18) and the air passage of the pipe joint III (19); regulating the pressure reducing valve I (18) can control the working air source pressure of the pressure reducing valve to be tested.

5. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to claim 4, characterized in that: Also includes: A button switch II (4) and a button switch I (5) are electrically connected to a two-position three-way solenoid valve I (14) and a two-position three-way solenoid valve II (15) in the gas source assembly (12) respectively, and are used to control the on and off of the two-position three-way solenoid valve I (14) and the two-position three-way solenoid valve II (15).

6. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to any one of claims 1 to 5, characterized in that: Also includes: A stop valve (11) is installed between the quick connector I (16) and the quick connector III (31) and between the quick connector II (20) and the quick connector III (31).

7. The pneumatic working mechanism for detecting and debugging a pressure reducing valve according to any one of claims 1 to 5, characterized in that: Also includes: A digital pressure gauge II (3), a digital pressure gauge III (6) and a digital pressure gauge I (7); the digital pressure gauge III (6) is electrically connected to the pressure sensor III (8), the digital pressure gauge I (7) is electrically connected to the pressure sensor I (10), the digital pressure gauge II (3) is electrically connected to the pressure sensor II (9), the digital pressure gauge III (6) is used to display the working air pressure of the air inlet of the pressure reducing valve under test monitored by the pressure sensor III (8), and the digital pressure gauge I (7) and the digital pressure gauge II (3) are used to display the adjusted output pressures of the two pressure reducing valves under test respectively.

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