A main transformer pressure measurement experimental device

Abstract

The present invention belongs to the field of power transformer test equipment, and proposes a main transformer pressure measurement experimental device, including a calibration table, a calibration test gas circuit, a compressor, a valve, an interactive table, a liquid crystal screen, a pressure gauge, a pressure regulating valve, an alarm lamp, a clamping table, a clamping bottom plate, a flange plate and a test port, wherein a sealing switching mechanism is arranged on the clamping table, and a clamp-type clamping mechanism distributed near the rear side of the calibration table is arranged above the sealing switching mechanism, and the clamp-type clamping mechanism comprises a first clamp arm, a second clamp arm and a two-way reciprocating cylinder, and the jaws of the first clamp arm and the second clamp arm are used to clamp the pressure release valve, and a clamping cylinder for driving the clamp-type clamping mechanism and the pressure release valve to descend is arranged above the jaws, and a feeding rack is arranged on the clamping table, and the feeding rack transmits the pressure release valve from the front side of the clamping table to the rear side of the clamping table. The present invention has reasonable design, can realize automatic clamping, and is conducive to improving detection efficiency, and is suitable for large-scale promotion.

Description

Technical Field

[0001] The invention belongs to the field of power transformer testing equipment, and in particular relates to a main transformer pressure measurement experimental device. Background Art

[0002] If the internal pressure of the main transformer is not within the standard range, it will cause many problems, including mechanical damage such as oil tank deformation, seal failure such as oil leakage, and in severe cases, a large amount of oil leakage will cause the oil level to drop rapidly, exposing the winding and other components to a state of less oil or even no oil, causing overheating and burning, affecting the operating conditions of the equipment. In order to automatically control the internal pressure of the power transformer, in addition to installing an intelligent pressure gauge or a pointer pressure gauge on the main transformer, a pressure relief valve will also be installed. The pressure relief valve can release pressure in time when the pressure is too high to ensure that the internal pressure of the transformer meets the standard. In order to ensure the working sensitivity of the pressure relief valve, it is necessary to conduct a measurement experiment on the pressure relief valve. The calibration bench used in the experiment can simulate the changes in the internal pressure of the transformer, and display the instantaneous action and pressure changes of the pressure relief valve on the display screen.

[0003] The existing patent CN200720090979.1 discloses a pressure relief valve test bench, which specifically involves a pressure relief valve test bench that simulates the action mechanism of the pressure relief valve when the transformer fails internally and adopts single-chip microcomputer measurement and control technology, including a pressure relief valve test gas circuit, a hydraulic clamping mechanism and a single-chip microcomputer control system: a pressure sensor, a deflation solenoid valve and a safety valve are installed on the pressure test tank, and the air inlet of the pressure test tank is connected to the large air inlet increment solenoid valve, the small air inlet increment solenoid valve, the air inlet of the test bench and the air compressor through an air pipe; the hydraulic power unit with a directional control valve is connected to the hydraulic cylinder through an oil pipe. The device can simulate the transformer pressure to detect the pressure relief valve, but the pressure relief valve needs to be manually clamped, and the detection efficiency is low. Summary of the invention

[0004] In view of the technical problems existing in the above-mentioned calibration bench, the present invention proposes a main transformer pressure measurement experimental device which has a reasonable design, can realize automatic clamping and is conducive to improving detection efficiency.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is that a main transformer pressure measurement experimental device provided by the present invention includes a calibration table, wherein a calibration test gas circuit, a compressor and a plurality of valves are arranged inside the calibration table, an interactive table top is arranged on the top of the calibration table, a liquid crystal screen, a pressure gauge, a pressure regulating valve and a plurality of alarm lights are arranged on the interactive table top, a clamping table top is also arranged on the calibration table, a clamping base plate is arranged on the clamping base plate, a flange plate and a test port are arranged at the center of the clamping base plate, a sealing adapter mechanism is arranged on the clamping base plate, three top plates distributed in a circular array are arranged on the sealing adapter mechanism, three airways connected to the test port and corresponding to the top plate are arranged inside the sealing adapter mechanism, a transfer test nozzle connected to the airway is arranged at the center of the top plate, and a transfer test nozzle is arranged on the transfer test nozzle. A plug, a clamp-type clamping mechanism distributed near the rear side of the inspection table is arranged above the sealing adapter mechanism, a vertical plate for installing the clamp-type clamping mechanism is arranged on the side of the interactive table, the clamp-type clamping mechanism includes a first clamp arm and a second clamp arm hinged with the vertical plate, the driving ends of the first clamp arm and the second clamp arm are provided with a two-way reciprocating cylinder, the first clamp arm and the second clamp arm are provided with jaws at the end away from the vertical plate, the jaws are used to clamp the pressure relief valve, a clamping cylinder for driving the clamp-type clamping mechanism and the pressure relief valve to descend is arranged above the jaws, a cantilever connected to the vertical plate is arranged on the side of the clamping cylinder, a feeding rack is arranged on the clamping table, the feeding rack includes a supporting rail for transmitting the pressure relief valve from the front side of the clamping table to the rear side of the clamping table, and a clamping lifting port for the clamp-type clamping mechanism to move up and down is arranged on the support rail.

[0006] Preferably, the sealing adapter mechanism includes an adapter base plate and an adapter top plate, the adapter base plate is an inner circle and outer square structure, pads are provided at the bottom corners of the adapter base plate, four radially distributed reinforcing ribs are provided on the top of the adapter base plate, a flange ring matching the clamping base plate is provided in the center of the adapter base plate, the flange ring is connected to the clamping base plate by bolts, a stepped opening for sealing and screwing with the adapter top plate is provided on the top of the adapter base plate, an annular shoulder docking with the flange plate above and below is provided at the center bottom of the adapter top plate, a central blind hole connected to the test port is provided in the center of the annular shoulder, and the central blind hole is connected to the airway.

[0007] Preferably, a swinging and driving mechanism is arranged on the rear side of the clamping table, and the swinging and driving mechanism comprises a swinging motor, a swing shaft is arranged at the power output end of the swinging motor, a swing arm is arranged on the swing shaft, and the swing arm and the second clamp arm are cross-distributed in a V shape.

[0008] Preferably, the pliers-type clamping mechanism comprises a pair of hinged support assemblies arranged at the hinged end of the first pliers arm and the hinged end of the second pliers arm, and the hinged support assemblies enable the first pliers arm and the second pliers arm to complete horizontal swinging and up and down lifting movements.

[0009] Preferably, the articulated support assembly includes a fixed support connected to the vertical plate, a hinge shaft is arranged at the center of the fixed support, a positioning nut is arranged at the top of the hinge shaft, a spring is arranged on the hinge shaft sleeve, the top of the spring is used to support the first clamp arm and the second clamp arm, a rotating cylinder is arranged above the spring, a connecting rod is arranged on the side of the rotating cylinder, a hinge head is hingedly arranged at the end of the connecting rod, and the hinge head is connected to the telescopic end of the bidirectional reciprocating cylinder.

[0010] Preferably, the cross-section of the first clamp arm and the second clamp arm is a horizontal L-shape and the end of the L-shape is used to clamp the side ring of the pressure relief valve. The first clamp arm and the second clamp arm swing horizontally to form a triangular structure so that the jaws can clamp the pressure relief valve.

[0011] Preferably, the second clamp arm is provided with a triangular inner clamp plate in the direction toward the first clamp arm, one side of the inner clamp plate is tangent to the jaws, and when the bidirectional reciprocating cylinder drives the second clamp arm to open, the other side of the inner clamp plate can be parallel to the feeding direction of the feed rack.

[0012] Preferably, the telescopic end of the clamping cylinder faces downward and is provided with a brake member, the brake member is a groove-shaped structure with an opening facing downward, the diameter of the brake member is smaller than the top diameter of the pressure relief valve, and a plurality of hollow openings are provided on the side of the brake member.

[0013] Preferably, the cantilever is a telescopic arm structure.

[0014] Preferably, a rear support plate is provided on the rear side of the inspection table, and the rear support plate is connected to the vertical plate and the feeding rack.

[0015] Compared with the prior art, the advantages and positive effects of the present invention are as follows: the present invention provides a main transformer pressure measurement experimental device, the sealing adapter mechanism converts the test orientation of the original test port to the back side close to the clamping table, which can make sufficient space for operating the interactive table and observing the action of the pressure release valve, and can better cooperate with the clamp-type clamping mechanism and the clamping cylinder on the other hand; multiple pressure release valves can be placed on the feeding rack at the same time, and the clamp-type clamping mechanism clamps the pressure release valve through opening and closing actions, and the clamping cylinder brakes the pressure release valve downward to achieve sealing docking with the adapter test nozzle, thereby completing the corresponding pressure test. The device is reasonably designed, can realize automatic clamping, and is conducive to improving detection efficiency, and is suitable for large-scale promotion. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0017] Figure 1 A working axonometric diagram of a main transformer pressure measurement experimental device provided in an embodiment;

[0018] Figure 2 A working front view of a main transformer pressure measurement experimental device provided in an embodiment;

[0019] Figure 3 An axonometric diagram of a main transformer pressure measurement experimental device provided in an embodiment;

[0020] Figure 4 It is a three-dimensional diagram of a test bench in the prior art;

[0021] Figure 5 A top view of a main transformer pressure measurement experimental device provided in an embodiment;

[0022] Figure 6 It is an axonometric view of the clamp-type clamping mechanism, the feeding rack and the swing-feeding mechanism;

[0023] Figure 7 It is a schematic diagram of the first clamp arm and the second clamp arm being opened;

[0024] Figure 8 It is the front view of the clamp-type clamping mechanism, the feeding rack and the swinging feeding mechanism;

[0025] Fig. 9 A cross-sectional view of a sealing adapter mechanism provided in an embodiment;

[0026] Fig.10 An axonometric view of a sealing adapter mechanism provided in an embodiment;

[0027] In the above figures:

[0028] 1. Verification table; 11. Interactive table; 12. LCD screen; 13. Pressure gauge; 14. Pressure regulating valve; 15. Alarm light; 16. Clamping table; 17. Clamping bottom plate; 18. Flange plate; 19. Test port; 110. Rear support plate; 2. Sealing adapter mechanism; 21. Top plate; 22. Airway; 23. Adapter test nozzle; 24. Adapter plug; 25. Adapter bottom plate; 26. Adapter top plate; 27. Pad; 28. Reinforcement rib; 29. ​​Flange ring; 210. Stepped mouth; 211. Ring shoulder; 212. Center blind hole; 3. Clamping mechanism; 31 , vertical plate; 32, first clamp arm; 33, second clamp arm; 34, two-way reciprocating cylinder; 35, jaws; 36, hinged support assembly; 361, fixed support; 362, hinge shaft; 363, positioning nut; 364, spring; 365, rotating drum; 366, connecting rod; 367, hinge head; 37, inner clamping plate; 4, pressure release valve; 5, clamping cylinder; 51, brake; 52, hollow mouth; 6, cantilever; 7, feeding rack; 71, support rail; 72, clamping lifting mouth; 8, swinging and sending mechanism; 81, swinging motor; 82, swing shaft; 83, swing arm. DETAILED DESCRIPTION

[0029] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict. For the convenience of description, if the words "upper", "lower", "left" and "right" appear below, they only indicate that the upper, lower, left and right directions are consistent with the accompanying drawings themselves, and do not limit the structure.

[0030] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0031] Examples, such as Figure 1-Figure 10 As shown, a main transformer pressure measurement experimental device provided by the present invention comprises a calibration table 1, wherein the calibration table 1 is provided with a calibration test gas circuit, a compressor and a plurality of valves, an interactive table 11 is provided on the top of the calibration table 1, and a liquid crystal screen 12, a pressure gauge 13, a pressure regulating valve 14 and a plurality of alarm lights 15 are provided on the interactive table 11, and a clamping table 16 is also provided on the calibration table 1, and a clamping bottom plate 17 is provided on the clamping bottom plate 17, and a flange plate 18 and a test port 19 are provided at the center of the clamping bottom plate 17. Among them, the calibration test gas circuit, the compressor, the valve, the interactive table 11, the liquid crystal screen 12, the pressure gauge 13, the pressure regulating valve 14, the alarm light 15, the clamping table 16, the clamping bottom plate 17, the flange plate 18 and the test port 19 are prior arts, and will not be described in detail in this embodiment.

[0032] In order to improve the automatic clamping efficiency of the device, a sealing adapter mechanism 2 is provided on the clamping table 16 provided by the present invention, and three top plates 21 distributed in a circular array are provided on the sealing adapter mechanism 2. Three air passages 22 connected to the test port 19 and corresponding to the top plates 21 are provided inside the sealing adapter mechanism 2. A transfer test nozzle 23 connected to the air passage 22 is provided at the center of the top plate 21, and a transfer plug 24 is provided on the transfer test nozzle 23. A clamp-type clamping mechanism 3 distributed near the rear side of the inspection table 1 is provided above the sealing adapter mechanism 2, and a vertical plate 31 for installing the clamp-type clamping mechanism 3 is provided on the side of the interactive table 11. The clamp-type clamping mechanism 3 includes a first The clamp arm 32 and the second clamp arm 33, the driving ends of the first clamp arm 32 and the second clamp arm 33 are provided with a two-way reciprocating cylinder 34, the first clamp arm 32 and the second clamp arm 33 are provided with a jaw 35 at the end away from the vertical plate 31, the jaw 35 is used to clamp the pressure release valve 4, the clamp cylinder 5 used to drive the clamp-type clamping mechanism 3 and the pressure release valve 4 to descend is provided above the jaw 35, the side of the clamping cylinder 5 is provided with a cantilever 6 connected to the vertical plate 31, and a feeding rack 7 is provided on the clamping table 16, the feeding rack 7 includes a support track 71 for conveying the pressure release valve 4 from the front side of the clamping table 16 to the rear side of the clamping table 16, and the support track 71 is provided with a clamping lifting port 72 for the clamp-type clamping mechanism 3 to move up and down. Among them, the adapter test nozzle 23 on the top plate 21 can adopt different models to facilitate docking with pressure release valves 4 of different models; the adapter test nozzle 23 that does not need to be docked can be connected to the adapter plug 24 to maintain sealing.

[0033] In the present device, the sealing adapter mechanism 2 converts the test orientation of the original test port 19 to the rear side close to the clamping table 16. On the one hand, it can leave sufficient space for operating the interactive table 11 and observing the action of the pressure relief valve 4. On the other hand, it can better coordinate with the clamp-type clamping mechanism 3 and the clamping cylinder 5. Multiple pressure release valves 4 can be placed on the feeding rack 7 at the same time, and the support track 71 of the feeding rack 7 can be designed with an inclination degree such as 3~5°, so that the pressure release valve 4 to be tested can have a tendency to move toward the position of the jaw 35; the opening and closing action of the clamp-type clamping mechanism 3 is controlled by the two-way reciprocating cylinder 34, and the two-way reciprocating cylinder 34 drives the first clamp arm 32 and the second clamp arm 33 at the same time. For example, the pressure release valve 4 closest to the jaw 35 can be dialed into the clamping range through the opening action, and then the pressure release valve 4 can be clamped into the jaw 35 along the support track 71 through the closing action. The clamp-type clamping mechanism 3 and the pressure release valve 4 are driven by the clamping cylinder 5 to synchronously descend to the level of the top plate 21, so that the pressure release valve 4 and the adapter test nozzle 23 are sealed and connected; by starting the test system of the calibration bench 1, air pressure can be provided to the adapter test nozzle 23 equipped with the pressure release valve 4, thereby completing the corresponding pressure test operation. The pressure release valve 4 after the test can be sent to the end of the feeding rack 7 through the opening action of the clamp-type clamping mechanism 3.

[0034] like Fig. 9 and Fig.10As shown, the sealing adapter mechanism 2 is improved on the basis of the original clamping base plate 17, the flange plate 18 and the test port 19. Specifically, the sealing adapter mechanism 2 includes an adapter base plate 25 and an adapter top plate 26. The adapter base plate 25 is an inner circle and outer square structure. Pads 27 are arranged at the bottom corners of the adapter base plate 25. Four radially distributed reinforcing ribs 28 are arranged on the top of the adapter base plate 25. A flange ring 29 matching the clamping base plate 17 is arranged at the center of the adapter base plate 25. The flange ring 29 is connected to the clamping base plate 17 by bolts. A stepped opening 210 sealingly screwed with the adapter top plate 26 is arranged on the top of the adapter base plate 25. A ring shoulder 211 connected to the flange plate 18 up and down is arranged at the center bottom of the adapter top plate 26. A central blind hole 212 connected to the test port 19 is arranged at the center of the ring shoulder 211. The central blind hole 212 is connected to the airway 22. Among them, the square edge of the adapter base plate 25 and the side edge of the same orientation of the clamping table 16 are basically located in the same plane to ensure the overall performance of the device; the reinforcing ribs 28 are used to improve the structural strength of the adapter base plate 25, and the pads 27 are used to support the adapter base plate 25, so that the adapter base plate 25 and the flange ring 29 are stably seated on the clamping base plate 17, and the inner wall and the side of the clamping base plate 17 are in a nested relationship, thereby forming a better assembly relationship. Further, the adapter top plate 26 is installed in the stepped opening 210 by threading or press-fitting, forming a relatively sealed relationship with the adapter base plate 25. At the same time, the test port 19, the central blind hole 212 and the airway 22 form a continuous channel relationship, so clamping the pressure release valve 4 on the adapter test nozzle 23 can effectively connect to the test air path of the test bench 1, thereby completing the pressure test.

[0035] like Figure 1 , Figure 6 and Figure 8 As shown, considering that the clamping lifting port 72 on the feeding rack 7 causes the pressure relief valve 4 in the jaw 35 to lack a certain area of ​​bottom support, the pressure relief valve 4 is clamped by the clamp-type clamping mechanism 3 during the test to ensure the accuracy of the position. In order to ensure that the pressure relief valve 4 can be effectively transmitted forward after the clamp-type clamping mechanism 3 is opened, the present invention is provided with a swinging and driving mechanism 8 on the rear side of the clamping table 16. The swinging and driving mechanism 8 includes a swinging motor 81. A swing shaft 82 is provided at the power output end of the swinging motor 81. A swing arm 83 is provided on the swing shaft 82. The swing arm 83 and the second clamp arm 33 are cross-distributed in a V shape. The swing motor 81 drives the swing shaft 82 to rotate, and the swing shaft 82 drives the swing arm 83 to stick to the side of the pressure release valve 4, and forms an up and down staggered clamping relationship with the second clamp arm 33, effectively clamping the pressure release valve 4; while the second clamp arm 33 is continuously opened, the swing arm 83 always maintains contact with the pressure release valve 4 until the pressure release valve 4 moves along the support rail 71 to the end of the feeding rack 7.

[0036] like Figure 6-Figure 8As shown, the clamp-type clamping mechanism 3 includes a pair of hinged support assemblies 36 arranged at the hinged end of the first clamp arm 32 and the hinged end of the second clamp arm 33, and the hinged support assemblies 36 are provided for the first clamp arm 32 and the second clamp arm 33 to complete horizontal swing and up and down lifting and lowering movements. Specifically, the hinged support assembly 36 provided by the present invention includes a fixed support 361 connected to the vertical plate 31, a hinge shaft 362 is arranged at the center of the fixed support 361, a positioning nut 363 is arranged at the top of the hinge shaft 362, a spring 364 is sleeved on the hinge shaft 362, the top of the spring 364 is used to support the first clamp arm 32 and the second clamp arm 33, a rotating cylinder 365 is arranged above the spring 364, a connecting rod 366 is arranged on the side of the rotating cylinder 365, and a hinge head 367 is hingedly arranged at the end of the connecting rod 366, and the hinge head 367 is connected to the telescopic end of the two-way reciprocating cylinder 34. Among them, the cylinder barrel of the two-way reciprocating cylinder 34 establishes an assembly relationship with the vertical plate 31 through a hinge support. When the two ends of the two-way reciprocating cylinder 34 perform telescopic actions, the hinged support assembly 36 and the two-way reciprocating cylinder 34 produce a planar connecting rod effect. The two-way reciprocating cylinder 34 can rotate accordingly around the assembly center between it and the vertical plate 31 to avoid the occurrence of a dead point in the rotation center of the first clamp arm 32 and the second clamp arm 33. Furthermore, the hinge shaft 362 is key-connected to the rotating cylinder 365, and the hinge shaft 362 rotates synchronously with the first clamp arm 32 and the second clamp arm 33. When the two-way reciprocating cylinder 34 drives the connecting rods 366 at both ends to rotate, the rotating cylinder 365, the hinge shaft 362, the first clamp arm 32 and the second clamp arm 33 produce a linkage action, thereby completing the corresponding opening and closing action; the spring 364 plays a role in supporting the first clamp arm 32 and the second clamp arm 33, and when the clamping cylinder 5 performs the loading action, the clamp-type clamping mechanism 3 and the pressure release valve 4 can be synchronously lowered to dock with the test port 19; after the test is completed, the spring 364 can quickly reset the clamp-type clamping mechanism 3 to perform the subsequent actions.

[0037] In order to improve the clamping performance of the clamp-type clamping mechanism 3 and match the pressure release valve 4, the first clamp arm 32 and the second clamp arm 33 provided by the present invention have a horizontal L-shaped cross-section and the end of the L-shaped is used to clamp the side ring of the pressure release valve 4. The first clamp arm 32 and the second clamp arm 33 swing horizontally to form a triangular structure so that the jaws 35 can clamp the pressure release valve 4. The triangular structural characteristics of the first clamp arm 32 and the second clamp arm 33 also take into account the relationship between the installation orientation of the clamp-type clamping mechanism 3 and the position of the adapter test nozzle 23. In this way, it does not affect the staff's operation and observation of the release action of the pressure release valve 4 on the interactive table 11, and can ensure that the improved part of the equipment has good spatial coordination, and also provides reliable mechanical conditions for automatically clamping the pressure release valve 4.

[0038] like Figure 6 and Figure 7As shown, the second clamp arm 33 is provided with a triangular inner clamp plate 37 in the direction toward the first clamp arm 32, one side of the inner clamp plate 37 is tangent to the jaw 35, and the bidirectional reciprocating cylinder 34 drives the second clamp arm 33 to open so that the other side of the inner clamp plate 37 is parallel to the feeding direction of the feeding rack 7. In the process of the second clamp arm 33 opening successively, the swing arm 83 cooperates with the second clamp arm 33 to maintain the clamping of the pressure release valve 4, and the pressure release valve 4 can generate relative displacement with the second clamp arm 33 along the tangent direction of the jaw 35, and move orderly toward the end direction of the feeding rack 7 with the cooperation of the support rail 71, until the inner clamp plate 37 and the pressure release valve 4 reach a parallel position, and the swing arm 83 directly pushes the pressure release valve 4 away from the opening and closing range of the second clamp arm 33, so as to facilitate the next cycle of testing action.

[0039] like Figure 8 As shown, the telescopic end of the clamping cylinder 5 faces downward and is provided with a brake 51. The brake 51 is a groove-shaped structure with an opening facing downward. The diameter of the brake 51 is smaller than the top diameter of the pressure release valve 4. The side of the brake 51 is provided with a plurality of hollow openings 52. The brake 51 is used at the execution end of the clamping cylinder 5 to load the pressure release valve 4. The notch portion of the brake 51 leaves sufficient space for the top center of the pressure release valve 4, which does not affect the ejection action of the center of the pressure release valve 4. In addition, the hollow opening 52 is also convenient for the staff to observe the ejection action of the pressure release valve 4.

[0040] In order to improve the docking accuracy between the clamping cylinder 5 and the adapter test nozzle 23 on the sealing adapter mechanism 2, the cantilever 6 provided by the present invention is a telescopic arm structure, and the braking center of the clamping cylinder 5 and the pressure release valve 4 can be maintained on the same vertical axis through telescopic adjustment.

[0041] like Figure 5 As shown, a rear support plate 110 is provided on the rear side of the inspection table 1, and the rear support plate 110 is connected to the vertical plate 31 and the feed rack 7. An effective frame system and support system are established through the rear support plate 110, the vertical plate 31 and the feed rack 7. A certain assembly plane is reasonably extended on the basis of the original inspection table 1. At the same time, the rear support plate 110 can also provide an installation basis for the swinging and feeding mechanism 8.

[0042] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A main transformer pressure measurement experimental device, comprising a calibration table, wherein a calibration test gas circuit, a compressor and a plurality of valves are arranged inside the calibration table, an interactive table is arranged on the top of the calibration table, a liquid crystal screen, a pressure gauge, a pressure regulating valve and a plurality of alarm lights are arranged on the interactive table, a clamping table is also arranged on the calibration table, a clamping bottom plate is arranged on the clamping bottom plate, a flange plate and a test port are arranged at the center of the clamping bottom plate, characterized in that: A sealing adapter mechanism is provided on the clamping table, and three top plates distributed in a circular array are provided on the sealing adapter mechanism. Three air passages connected to the test ports and corresponding to the top plates are provided inside the sealing adapter mechanism. A transfer test nozzle connected to the air passage is provided at the center of the top plate, and a transfer plug is provided on the transfer test nozzle. A clamp-type clamping mechanism distributed near the rear side of the inspection table is provided above the sealing adapter mechanism, and a vertical plate for installing the clamp-type clamping mechanism is provided on the side of the interactive table. The clamp-type clamping mechanism includes a first clamp arm and a second clamp arm hinged to the vertical plate. The clamp arm, the driving ends of the first clamp arm and the second clamp arm are provided with a two-way reciprocating cylinder, the first clamp arm and the second clamp arm are provided with a jaw at the end away from the vertical plate, the jaw is used to clamp the pressure relief valve, and a clamping cylinder for driving the clamp-type clamping mechanism and the pressure relief valve to descend is provided above the jaw, a cantilever connected to the vertical plate is provided on the side of the clamping cylinder, a feeding rack is provided on the clamping table, the feeding rack includes a supporting rail for transmitting the pressure relief valve from the front side of the clamping table to the rear side of the clamping table, and a clamping lifting port for the clamp-type clamping mechanism to move up and down is provided on the supporting rail.

2. A main transformer pressure measurement experimental device according to claim 1, characterized in that: The sealing adapter mechanism includes an adapter base plate and an adapter top plate. The adapter base plate is an inner circle and outer square structure. Pads are arranged at the bottom corners of the adapter base plate. Four radially distributed reinforcing ribs are arranged on the top of the adapter base plate. A flange ring matching the clamping base plate is arranged at the center of the adapter base plate. The flange ring is connected to the clamping base plate by bolts. A stepped opening sealingly screwed with the adapter top plate is arranged on the top of the adapter base plate. An annular shoulder docking with the flange plate above and below is arranged at the center bottom of the adapter top plate. A central blind hole connected to the test port is arranged at the center of the annular shoulder, and the central blind hole is connected to the airway.

3. A main transformer pressure measurement experimental device according to claim 1, characterized in that: A swinging and transmitting mechanism is arranged at the rear side of the clamping table, and the swinging and transmitting mechanism comprises a swinging motor, a swing shaft is arranged at the power output end of the swinging motor, a swing arm is arranged on the swing shaft, and the swing arm and the second clamp arm are cross-distributed in a V shape.

4. A main transformer pressure measurement experimental device according to claim 1, characterized in that: The clamp-type clamping mechanism comprises a pair of hinged support assemblies arranged at the hinged end of the first clamp arm and the hinged end of the second clamp arm, and the hinged support assemblies enable the first clamp arm and the second clamp arm to complete horizontal swinging and up and down lifting movements.

5. A main transformer pressure measurement experimental device according to claim 4, characterized in that: The hinge support assembly includes a fixed support connected to the vertical plate, a hinge shaft is arranged at the center of the fixed support, a positioning nut is arranged at the top of the hinge shaft, a spring is arranged on the hinge shaft sleeve, the top of the spring is used to support the first clamp arm and the second clamp arm, a rotating cylinder is arranged above the spring, a connecting rod is arranged on the side of the rotating cylinder, a hinge head is hingedly arranged at the end of the connecting rod, and the hinge head is connected to the telescopic end of the two-way reciprocating cylinder.

6. A main transformer pressure measurement experimental device according to claim 3 or 5, characterized in that: The cross-section of the first clamp arm and the second clamp arm is a horizontal L-shape, and the end of the L-shape is used to clamp the side ring of the pressure relief valve. The first clamp arm and the second clamp arm swing horizontally to form a triangular structure so that the jaws can clamp the pressure relief valve.

7. A main transformer pressure measurement experimental device according to claim 6, characterized in that: The second clamp arm is provided with a triangular inner clamp plate in the direction toward the first clamp arm, one side of the inner clamp plate is tangent to the jaws, and when the bidirectional reciprocating cylinder drives the second clamp arm to open, the other side of the inner clamp plate can be parallel to the feeding direction of the feeding rack.

8. A main transformer pressure measurement experimental device according to claim 1, characterized in that: The telescopic end of the clamping cylinder faces downward and is provided with a brake member, the brake member is a groove-shaped structure with an opening facing downward, the diameter of the brake member is smaller than the top diameter of the pressure release valve, and a plurality of hollow openings are provided on the side of the brake member.

9. A main transformer pressure measurement experimental device according to claim 8, characterized in that: The cantilever is a telescopic arm structure.

10. A main transformer pressure measurement experimental device according to claim 1, characterized in that: A rear support plate is arranged on the rear side of the inspection table, and the rear support plate is connected with the vertical plate and the feeding rack.

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