Testing device for pressure gauge and testing method thereof

Abstract

The invention relates to the technical field of pressure gauges, in particular to a testing device for a pressure gauge, which comprises a testing bearing table, a pneumatic pump is fixedly mounted on the testing bearing table, a supporting carrier plate is fixedly arranged on the testing bearing table, a gas delivery pipe is fixedly arranged on the pneumatic pump, and the supporting carrier plate plays a role in supporting the gas delivery pipe. The invention relates to a pressure gauge testing method, which comprises the following steps: step 1, starting a pneumatic pump, step 2, starting a pneumatic pump, step 3, starting a pneumatic pump, step 4, starting a pneumatic pump, step 5, starting a pneumatic pump, and step 6, starting a pneumatic pump; the test branch pipe is provided with a sealing pipe groove, and a first supporting inner plate is fixedly arranged on the inner side of the upper end of the test branch pipe; 2, positioning a pressure gauge; 3, testing a pressure gauge; and 4, the pressure gauge is replaced.

Description

Technical Field

[0001] The invention relates to the technical field of pressure gauges, and in particular to a testing device for a pressure gauge and a testing method thereof. Background Art

[0002] A pressure gauge is an instrument that uses an elastic element as a sensitive element to measure and indicate pressure higher than the ambient pressure. The pressure gauge uses the elastic deformation of the sensitive element inside the gauge, and then the conversion mechanism in the gauge movement transmits the pressure deformation to the pointer, causing the pointer to rotate to display the pressure.

[0003] After the pressure gauge is manufactured, it is necessary to test the pressure gauge to detect whether the pressure value it displays is within the allowable error. The existing pressure gauge testing device is relatively cumbersome to operate when in use. The pressure gauge needs to be fixed on the air pipe of the air pump through threads, and then the air pump is turned on to supply air to realize the pressure gauge test. The pressure gauge needs to be manually screwed and installed, which is cumbersome and inconvenient. This operation method is not convenient for continuous testing, which makes the test efficiency of the pressure gauge low. Summary of the invention

[0004] The object of the present invention is to provide a testing device for a pressure gauge and a testing method thereof to solve the problems raised in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solutions:

[0006] 4. The repairing kit for automotive dents, according to claim 1, wherein the foot stand comprises a through-hole, and the two foot pieces comprise two bosses, wherein the bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole, a screw bolt, and a nut. The bosses comprise a through-hole. The bosses comprise a through-hole. The bosses comprise a through-hole. The bosses comprise a through-hole.

[0007] Preferably, the pressure gauge convenient connection test mechanism includes a movable mounting rod, a load-bearing movable plate, a movable connecting block, a connecting mating plug rod and a sealing connecting pipe sleeve, the movable mounting rod is inserted into the mounting socket, and a hemispherical sealing block is fixedly provided at the lower end of the movable mounting rod, the hemispherical sealing block is in the gas pipe, a limiting top plate is fixedly provided at the upper end of the movable mounting rod, and a first matching spring is sleeved on the movable mounting rod.

[0008] Preferably, a bearing movable plate is installed on the test branch pipe, an operating hand plate is fixedly provided on one side of the bearing movable plate, and a sealing pipe sleeve is fixedly provided at the lower end of the bearing movable plate, the sealing pipe sleeve is inserted in the sealing pipe groove, and a matching connecting pipe is fixedly provided at the upper end of the bearing movable plate.

[0009] Preferably, a mating convex ring is fixedly provided on the mating connecting tube, and a second supporting inner plate is fixedly provided inside the upper end of the mating connecting tube, a push-down contact rod is fixedly provided at the lower end of the second supporting inner plate, and the mating connecting tube is connected with the sealing tube sleeve.

[0010] Preferably, bearing limit plates are symmetrically fixedly arranged at both ends of the bearing movable plate, and guide limit holes are opened on the bearing limit plates. Limit matching rods are inserted in the guide limit holes, and a second matching spring is sleeved on the limit matching rods.

[0011] Preferably, a supporting and matching vertical plate is fixedly provided on the other side of the supporting movable plate, a connecting and matching hole is provided on the supporting and matching vertical plate, and a movable slide is also provided on the supporting and matching vertical plate. Limited slides are symmetrically provided at both ends of the inner part of the movable slide, and a supporting top plate is fixedly provided on the upper end of the supporting and matching vertical plate, and a supporting and matching ring is fixedly provided on the supporting top plate.

[0012] Preferably, the movable connecting block is installed on the bearing movable plate, and a bearing plug-in rod is fixedly provided on the movable connecting block, the bearing plug-in rod is inserted in the connecting matching hole, and supporting bending rods are symmetrically fixedly provided at both ends of the movable connecting block, and a limited matching pressure plate is fixedly provided at the upper end of the supporting bending rod, and a first movable connecting rod is hinged at the upper end of the movable connecting block, and a counterweight sliding block is hinged at the upper end of the first movable connecting rod, and the counterweight sliding block is inserted in the movable slide, and limited matching sliders are symmetrically fixedly provided at both ends of the counterweight sliding block, and the limited matching slider is inserted in the limited slide.

[0013] Preferably, the engaging rod is inserted in a stable connection frame, and connecting blocks are symmetrically fixedly provided at both ends of the engaging rod, a second movable connecting rod is hinged on the connecting block, and a sealing connecting sleeve is hinged on the other end of the second movable connecting rod.

[0014] Preferably, a sealing pad is fixedly provided on the inner end surface of the sealing connecting sleeve, and a mounting plug-in rod is fixedly provided on the outer side of the sealing connecting sleeve, the mounting plug-in rod is plugged into the mating socket, and a connecting mating plate is fixedly provided on the end of the mounting plug-in rod away from the sealing connecting sleeve, and the connecting mating plate is hinged to the second movable connecting rod.

[0015] A pressure gauge testing method comprises the following steps:

[0016] Step 1: Start the air pressure pump: Start the air pressure pump on the test platform to allow gas to be transported in the gas pipe;

[0017] Step 2: Positioning of the pressure gauge: Insert the threaded column on the pressure gauge into the load-bearing matching ring to position the pressure gauge;

[0018] Step 3: Testing of the pressure gauge: Push the supporting movable plate downward to drive the pressure gauge downward, so that the test branch pipe is connected with the gas pipe, and the pressure gauge is fixed and sealed with the test branch pipe, thereby testing the pressure gauge;

[0019] Step 4: Replace the pressure gauge: realize the load-bearing movable plate, so that it can be reset under the action of the second matching spring, and at the same time make the pressure gauge in the unlocked state, remove it and replace it with the pressure gauge to be tested.

[0020] Compared with the prior art, the invention has the following advantages:

[0021] 1. When testing the pressure gauge, this test bearing platform can perform a continuity test, which makes the test efficient, simple, convenient and quick to operate. It only needs to place the pressure gauge on the bearing matching ring, and then push the bearing movable plate downward to fix the pressure gauge and connect the pressure gauge to the test branch pipe at the same time, and the test branch pipe and the gas pipe can be connected to realize the test of the pressure gauge. After the test is completed, the bearing movable plate can be reset under the action of the second matching spring, and the pressure gauge can be unlocked at the same time, so it can be quickly removed.

[0022] 2. When testing the pressure gauge, place it on the load-bearing matching ring, and then push the load-bearing movable plate downward to push the movable connecting block to move under the action of the matching push-top inclined surface, thereby driving the limit matching pressure plate to move to the top of the pressure gauge and contact with the upper end of the pressure gauge, thereby fixing the pressure gauge and ensuring its stability during the test.

[0023] 3. In addition, when the supporting movable plate moves downward, the driving oblique frame will drive the connecting rod to move away from the supporting plate, so that the two matching sealing pipe sleeves will be moved toward each other and connected to the threaded column of the pressure gauge and the matching connecting pipe under the action of the second movable connecting rod, so as to realize the sealed connection between the pressure gauge and the matching connecting pipe, and at the same time, it will also drive the hemispherical sealing block to move, so that the test branch pipe is connected with the gas pipe, so as to ensure the smooth progress of the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 A first-person perspective diagram of the test platform assembly.

[0025] Figure 2 for Figure 1 A magnified schematic diagram of center A.

[0026] Figure 3 A second perspective diagram of the test platform assembly.

[0027] Figure 4 for Figure 3 A magnified schematic diagram of point B in the middle.

[0028] Figure 5 Schematic diagram of the explosion of the internal assembly of the test branch.

[0029] Figure 6 for Figure 5 Enlarged schematic diagram of point C in the middle.

[0030] Figure 7 This is a first-person perspective schematic diagram of the load-bearing movable plate assembly.

[0031] Figure 8 A schematic diagram from a second perspective of the load-bearing movable plate assembly.

[0032] Fig. 9 for Figure 8 Enlarged schematic diagram of point D in the middle.

[0033] Fig.10 It is a structural schematic diagram of the supporting movable plate.

[0034] In the figure: 1. Test bearing platform; 11. Air pressure pump; 12. Support bearing plate; 13. Air pipe; 14. Test branch pipe; 141. Sealing pipe groove; 142. First supporting inner plate; 143. Mounting socket; 15. Movable mounting rod; 151. Hemispherical blocking block; 152. Limiting top plate; 153. First matching spring; 16. Supporting convex block; 161. Limiting matching rod; 162. Limiting top column; 163. Matching socket; 17. Matching bearing plate; 171. Matching push-up inclined surface; 172. Stable connection frame; 173. Driving oblique frame; 2. Bearing movable plate; 20. Operating hand plate; 21. Sealing pipe sleeve; 22. Matching connecting pipe; 23. Matching convex ring; 24. The second supporting inner plate; 25, push-down contact rod; 26, bearing limit plate; 261, guide limit hole; 262, second matching spring; 27, supporting matching vertical plate; 271, connecting matching hole; 272, movable slide; 273, limit slide; 28, bearing top plate; 29, bearing matching ring; 3, movable connecting block; 31, bearing plug-in rod; 32, supporting bending rod; 33, limit matching pressure plate; 34, first movable connecting rod; 35, counterweight sliding block; 36, limit matching slider; 4, connecting matching plug-in rod; 41, connecting matching block; 42, second movable connecting rod; 5, sealing connecting sleeve; 51, sealing cushion; 52, installing plug-in rod; 53, connecting matching plate. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] See also Figures 1 to 10 , the present invention provides a technical solution:

[0037] A test device for a pressure gauge comprises a test platform 1, a pneumatic pump 11 is fixedly mounted on the test platform 1, a support carrier plate 12 is fixedly mounted on the test platform 1, a gas delivery pipe 13 is fixedly mounted on the pneumatic pump 11, the support carrier plate 12 supports the gas delivery pipe 13, a test branch pipe 14 is fixedly mounted on the gas delivery pipe 13, a sealing pipe groove 141 is provided on the test branch pipe 14, a first support inner plate 142 is fixedly mounted on the inner side of the upper end of the test branch pipe 14, a mounting socket 143 is provided on the first support inner plate 142, and both ends of the test branch pipe 14 are fixedly mounted on the inner side of the upper end of the test branch pipe 14. A supporting protrusion 16 is symmetrically fixed on the end, and a limiting matching rod 161 is fixed on the supporting protrusion 16. A limiting top column 162 is fixed on the upper end of the limiting matching rod 161, and a matching socket 163 is provided on the limiting top column 162. A matching bearing plate 17 is fixed on one side of the test branch pipe 14, and a matching push-up inclined surface 171 is fixed on one side of the matching bearing plate 17, and a stable connection frame 172 is fixed on the other side. A driving inclined frame 173 is connected to the lower side of the stable connection frame 172, and a pressure gauge is provided on the test bearing platform 1 to facilitate the connection of the test mechanism.

[0038] The pressure gauge convenient connection test mechanism includes a movable mounting rod 15, a bearing movable plate 2, a movable connection block 3, a connecting and matching plug rod 4 and a sealing connection pipe sleeve 5. The movable mounting rod 15 is inserted in the mounting socket 143, and a hemispherical blocking block 151 is fixedly provided at the lower end of the movable mounting rod 15. The hemispherical blocking block 151 is in the gas pipeline 13. A limiting top plate 152 is fixedly provided at the upper end of the movable mounting rod 15, and a first matching spring 153 is sleeved on the movable mounting rod 15, and the limiting top plate 152 is on the upper side of the first supporting inner plate 142. The two ends of the first matching spring 153 are respectively fixed on the limiting top plate 152 and the first supporting inner plate 142. When the hemispherical blocking block 151 plays a blocking role on the test branch pipe 14, it blocks the lower port of the test branch pipe 14.

[0039] A bearing movable plate 2 is installed on the test branch pipe 14, an operating hand plate 20 is fixedly provided on one side of the bearing movable plate 2, and a sealing pipe sleeve 21 is fixedly provided at the lower end of the bearing movable plate 2. The sealing pipe sleeve 21 is inserted into the sealing pipe groove 141 to achieve a sealed connection between the test branch pipe 14 and the sealing pipe sleeve 21, and a matching connecting pipe 22 is fixedly provided at the upper end of the bearing movable plate 2.

[0040] A matching convex ring 23 is fixedly provided on the matching connecting tube 22, and a second supporting inner plate 24 is fixedly provided inside the upper end of the matching connecting tube 22, a push-down contact rod 25 is fixedly provided at the lower end of the second supporting inner plate 24, the matching connecting tube 22 is connected with the sealing tube sleeve 21, and the outer diameter of the matching connecting tube 22 is equal to the diameter of the threaded column on the pressure gauge.

[0041] The two ends of the bearing movable plate 2 are symmetrically fixed with bearing limit plates 26, and a guide limit hole 261 is opened on the bearing limit plate 26. A limit matching rod 161 is inserted in the guide limit hole 261, and a second matching spring 262 is sleeved on the limit matching rod 161, and the two ends of the second matching spring 262 are respectively fixed on the supporting protrusion 16 and the bearing limit plate 26.

[0042] A supporting and matching vertical plate 27 is also fixedly provided on the other side of the supporting movable plate 2. A connecting and matching hole 271 is opened on the supporting and matching vertical plate 27, and a movable slide 272 is also opened on the supporting and matching vertical plate 27. The inner ends of the movable slide 272 are symmetrically provided with limited slides 273. A supporting top plate 28 is also fixedly provided on the upper end of the supporting and matching vertical plate 27. A supporting and matching ring 29 is fixedly provided on the supporting top plate 28, and the center line of the supporting and matching ring 29 is aligned with the center line of the matching connecting pipe 22.

[0043] The movable connecting block 3 is installed on the bearing movable plate 2, and a bearing plug-in rod 31 is fixedly provided on the movable connecting block 3, the bearing plug-in rod 31 is inserted in the connecting matching hole 271, and supporting bending rods 32 are symmetrically fixedly provided at both ends of the movable connecting block 3, and a limited matching pressure plate 33 is fixedly provided at the upper end of the supporting bending rod 32, and a first movable connecting rod 34 is hinged at the upper end of the movable connecting block 3, and a counterweight sliding block 35 is hinged at the upper end of the first movable connecting rod 34, and the counterweight sliding block 35 is inserted in the movable slide 272, and limited matching sliders 36 are symmetrically fixedly provided at both ends of the counterweight sliding block 35, and the limiting matching slider 36 is inserted in the limiting slide 273.

[0044] The engaging and fitting rod 4 is inserted into the stable connection frame 172, and connecting and fitting blocks 41 are symmetrically fixedly arranged at both ends of the engaging and fitting rod 4, a second movable connecting rod 42 is hinged on the connecting and fitting block 41, and a sealing connecting sleeve 5 is hinged on the other end of the second movable connecting rod 42. In addition, the engaging and fitting rod 4 is in contact with the inner wall of the stable connection frame 172, and the internal width of the stable connection frame 172 is equal to the internal width of the driving oblique frame 173.

[0045] A sealing cushion 51 is fixedly provided on the inner end surface of the sealing connecting sleeve 5, and a mounting plug-in rod 52 is fixedly provided on the outer side of the sealing connecting sleeve 5. The mounting plug-in rod 52 is plugged into the matching socket 163, and a connecting matching plate 53 is fixedly provided on the end of the mounting plug-in rod 52 away from the sealing connecting sleeve 5. The connecting matching plate 53 is hinged to the second movable connecting rod 42.

[0046] A pressure gauge testing method comprises the following steps:

[0047] Step 1: Start the air pressure pump 11: Start the air pressure pump 11 on the test support platform 1 so that gas is delivered in the gas delivery pipe 13;

[0048] Step 2: Positioning the pressure gauge: insert the threaded column on the pressure gauge into the load-bearing matching ring 29 to achieve the positioning and placement of the pressure gauge;

[0049] Step 3: Testing of the pressure gauge: Push the supporting movable plate 2 downward to drive the pressure gauge downward, so that the test branch pipe 14 is connected with the gas pipe 13, and the pressure gauge is fixed and sealed with the test branch pipe 14, thereby testing the pressure gauge;

[0050] Step 4: Replace the pressure gauge: realize the load-bearing movable plate 2, so that it is reset under the action of the second matching spring 262, and at the same time, the pressure gauge is in an unlocked state, and it is removed and replaced with the pressure gauge to be tested.

[0051] When testing the pressure gauge, start the air pump 11 to ensure continuous gas delivery in the air pipe 13, then insert the threaded column on the pressure gauge into the load-bearing matching ring 29 to position the pressure gauge, press the operating hand plate 20 downward to drive the load-bearing movable plate 2 to move downward, and as the load-bearing movable plate 2 moves downward, the movable connecting block 3 will also be driven to move downward. When the movable connecting block 3 moves downward, one end of the load-bearing plug-in rod 31 will contact the matching push-up inclined surface 171, so that under the action of the matching push-up inclined surface 171, the movable connecting block 3 will be pushed to move in the direction of the matching load-bearing plate 17, so that under the action of the first movable connecting rod 34, the counterweight sliding block 35 will be pushed upward, and at the same time, as the movable connecting block 3 moves, the limit counterweight will also be driven. The engaging pressure plate 33 moves, so that the limit matching pressure plate 33 moves to the top of the pressure gauge and contacts the upper end of the pressure gauge, so that the pressure gauge can be fixed. Then, as the supporting movable plate 2 moves further downward, the engaging and matching insertion rod 4 will move out of the stable connection frame 172 and enter the driving oblique frame 173. In this way, under the action of the driving oblique frame 173, the engaging and matching insertion rod 4 will be driven to move away from the matching supporting plate 17. As the engaging and matching insertion rod 4 moves, the two sealing connection pipe sleeves 5 will be driven to move toward each other under the action of the second movable connecting rod 42, and finally closed together. When the sealing connection pipe sleeve 5 moves, the sealing cushion 51 will contact the threaded column and the matching connection pipe 22 on the pressure gauge, so that the sealing The sealing gasket 51 is in an extruded state and in cooperation with the upper thread and the mating convex ring 23, the sealing between the threaded column, the mating connecting pipe 22 and the sealing connecting pipe sleeve 5 can be fully guaranteed, thereby realizing the sealed connection between the pressure gauge and the test branch pipe 14. The sealing gasket 51 is in close contact with the thread and the mating convex ring 23 during the extrusion process, so that the sealing gasket 51 can fill the gap between the thread gap and the mating convex ring 23, thereby making the connection sealing better. Moreover, during the closing process of the sealing connecting pipe sleeve 5, as the supporting movable plate 2 continues to move downward, the push-down contact rod 25 will contact the limit top plate 152, so that under the action of the push-down contact rod 25, the limit top plate 152 will be pushed downward, thereby driving the hemispherical blocking block 151 downward. The test branch pipe 14 is moved so that it is no longer blocked at the lower port of the test branch pipe 14, so that the test branch pipe 14 can be connected with the gas supply pipe 13, and the pressure gauge can be smoothly tested, that is, the installation and fixation of the pressure gauge is very convenient and quick, thereby greatly improving the test efficiency of the pressure gauge, and realizing the continuity test of the pressure gauge. After the test is completed, the bearing movable plate 2 can be released to make it move upward and reset under the action of the second matching spring 262, so that it can be reset, and the hemispherical blocking block 151 is reset under the action of the first matching spring 153, and the test branch pipe 14 is blocked again. Under the action of the stable connection frame 172, the sealing connection pipe sleeve 5 is reset and separated. When the bearing plug rod 31 is reset and separated from the matching push-up inclined surface 171,Under the action of gravity, the weight sliding block 35 moves downward to reset, so that the movable connecting block 3 can be pushed to reset, and then the limit matching pressure plate 33 no longer presses on the pressure gauge, so that the pressure gauge is released and can be quickly removed for replacement.

[0052] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A test device for a pressure gauge, comprising a test bearing platform (1), characterized in that: The test bearing platform (1) is fixedly mounted with an air pressure pump (11), and a support carrier plate (12) is fixedly arranged on the test bearing platform (1), an air delivery pipe (13) is fixedly arranged on the air pressure pump (11), and the support carrier plate (12) supports the air delivery pipe (13), a test branch pipe (14) is fixedly arranged on the air delivery pipe (13), a sealing pipe groove (141) is provided on the test branch pipe (14), and a first support inner plate (142) is fixedly arranged on the inner side of the upper end of the test branch pipe (14), and a mounting socket (143) is provided on the first support inner plate (142), and support holes (143) are symmetrically fixedly arranged at both ends of the test branch pipe (14). A support protrusion (16) is fixedly provided on the support protrusion (16), a limit matching rod (161) is fixedly provided on the upper end of the limit matching rod (161), a matching top column (162) is provided on the limit top column (162), a matching socket (163) is provided on the limit top column (162), a matching bearing plate (17) is fixedly provided on one side of the test branch pipe (14), a matching push-up inclined surface (171) is fixedly provided on one side of the matching bearing plate (17), and a stable connection frame (172) is fixedly provided on the other side, a driving inclined frame (173) is connected to the lower side of the stable connection frame (172), and a pressure gauge convenient connection test mechanism is provided on the test bearing platform (1).

2. A testing device for a pressure gauge according to claim 1, characterized in that: The pressure gauge convenient connection test mechanism comprises a movable mounting rod (15), a bearing movable plate (2), a movable connection block (3), a joint matching plug rod (4) and a sealing connection pipe sleeve (5); the movable mounting rod (15) is plugged into the mounting socket (143), and a hemispherical blocking block (151) is fixedly provided at the lower end of the movable mounting rod (15); the hemispherical blocking block (151) is located in the gas transmission pipe (13); a limiting top plate (152) is fixedly provided at the upper end of the movable mounting rod (15), and a first matching spring (153) is sleeved on the movable mounting rod (15).

3. A testing device for a pressure gauge according to claim 2, characterized in that: The test branch pipe (14) is provided with a bearing movable plate (2), one side of the bearing movable plate (2) is fixedly provided with an operating hand plate (20), and the lower end of the bearing movable plate (2) is fixedly provided with a sealing pipe sleeve (21), the sealing pipe sleeve (21) is inserted into the sealing pipe groove (141), and the upper end of the bearing movable plate (2) is fixedly provided with a matching connecting pipe (22).

4. A testing device for a pressure gauge according to claim 3, characterized in that: A matching convex ring (23) is fixedly arranged on the matching connecting tube (22), and a second supporting inner plate (24) is fixedly arranged inside the upper end of the matching connecting tube (22), and a push-down contact rod (25) is fixedly arranged at the lower end of the second supporting inner plate (24), and the matching connecting tube (22) is connected with the sealing tube sleeve (21).

5. A testing device for a pressure gauge according to claim 4, characterized in that: The two ends of the bearing movable plate (2) are symmetrically fixed with bearing limit plates (26), the bearing limit plates (26) are provided with guide limit holes (261), a limit matching rod (161) is inserted into the guide limit hole (261), and a second matching spring (262) is sleeved on the limit matching rod (161).

6. A testing device for a pressure gauge according to claim 5, characterized in that: A supporting and matching vertical plate (27) is fixedly provided on the other side of the supporting and matching vertical plate (2), a connecting and matching hole (271) is provided on the supporting and matching vertical plate (27), and a movable slideway (272) is provided on the supporting and matching vertical plate (27), and limited position slideways (273) are symmetrically provided at both ends of the movable slideway (272), and a supporting top plate (28) is fixedly provided on the upper end of the supporting and matching vertical plate (27), and a supporting and matching ring (29) is fixedly provided on the supporting top plate (28).

7. A testing device for a pressure gauge according to claim 6, characterized in that: The movable connection block (3) is installed on the bearing movable plate (2), and a bearing plug-in rod (31) is fixedly arranged on the movable connection block (3), and the bearing plug-in rod (31) is inserted into the connecting matching hole (271), and supporting bending rods (32) are symmetrically fixedly arranged at both ends of the movable connection block (3), and a limited matching pressure plate (33) is fixedly arranged at the upper end of the supporting bending rod (32), and a first movable connecting rod (34) is hinged at the upper end of the movable connection block (3), and a counterweight sliding block (35) is hinged at the upper end of the first movable connecting rod (34), and the counterweight sliding block (35) is inserted into the movable slide (272), and limited matching sliders (36) are symmetrically fixedly arranged at both ends of the counterweight sliding block (35), and the limited matching slider (36) is inserted into the limited slide (273).

8. A testing device for a pressure gauge according to claim 7, characterized in that: The engaging and fitting rod (4) is inserted into the stable connection frame (172), and connecting and fitting blocks (41) are symmetrically fixedly arranged at both ends of the engaging and fitting rod (4), a second movable connecting rod (42) is hinged on the connecting and fitting block (41), and the other end of the second movable connecting rod (42) is hinged with a sealing connecting pipe sleeve (5).

9. A testing device for a pressure gauge according to claim 8, characterized in that: A sealing cushion (51) is fixedly provided on the inner end surface of the sealing connection sleeve (5), and a mounting plug rod (52) is fixedly provided on the outer side of the sealing connection sleeve (5), the mounting plug rod (52) is plugged into the matching socket (163), and a connecting matching plate (53) is fixedly provided on the end of the mounting plug rod (52) away from the sealing connection sleeve (5), and the connecting matching plate (53) is hinged to the second movable connecting rod (42).

10. A pressure gauge testing method, characterized in that: The test method is applicable to the test device according to any one of claims 1 to 9, comprising the following steps: Step 1: Start the air pressure pump (11): Start the air pressure pump (11) on the test support platform (1) so that gas is transported in the gas pipe (13); Step 2: Positioning the pressure gauge: inserting the threaded column on the pressure gauge into the load-bearing matching ring (29) to achieve positioning and placement of the pressure gauge; Step 3: Testing the pressure gauge: Pushing the supporting movable plate (2) downwards, driving the pressure gauge downwards, and connecting the test branch pipe (14) with the gas pipe (13), and fixing the pressure gauge and sealing the pressure gauge with the test branch pipe (14), thereby testing the pressure gauge; Step 4: Replace the pressure gauge: Move the load-bearing movable plate (2) so that it is reset under the action of the second matching spring (262), while the pressure gauge is unlocked, and is removed and replaced with the pressure gauge to be tested.

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