A test device for the sealing performance of a transformer cabinet

Abstract

The present invention belongs to the technical field of sealing test, and specifically discloses a cabin sealing test device for a transformer cabinet, including a pressure sensing balancing mechanism, a dual-mode static detection mechanism and a gas storage mechanism, wherein the dual-mode static detection mechanism is arranged between the pressure sensing balancing mechanism and the gas storage mechanism; the pressure sensing balancing mechanism includes an exhaust rate adjustment component, an in-cabin air pressure sensing component and a transmission component, wherein the in-cabin air pressure sensing component is arranged on the exhaust rate adjustment component, and the transmission component is arranged on the in-cabin air pressure sensing component. The present invention proposes a test method of continuously releasing air into the cabin through a high-pressure gas tank, and when the cabin reaches the stage of intake and exhaust phase balance, the cabin pressure and intake and exhaust speed at this time are recorded, and the cabin sealing is fed back when multiple sets of "pressure-leakage speed" data are tested.

Description

Technical Field

[0001] The invention belongs to the technical field of sealing test, and in particular relates to a cabin sealing test device for a transformer cabinet. Background Art

[0002] The assembled prefabricated cabin is a cabin structure that looks like a container. It can be used to quickly complete the installation and placement of electrical equipment such as distribution cabinets in temporary construction scenarios. This type of prefabricated transformer cabin is generally placed directly outdoors, so compared to small ordinary distribution cabinets located indoors, it often has higher sealing requirements.

[0003] Since this type of cabin is generally installed and used repeatedly, it is often necessary to re-test the sealing performance during the second installation; this large cabin is limited by its size and weight, and is not convenient to transport to a designated test site for testing, nor can it be placed in a test room for testing like a small distribution cabinet. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention proposes a portable test device for detecting the sealing of the cabin, which is placed inside the cabin after the cabin is installed. Since it is not possible to open a hole in the cabin specifically for the test, and there is currently no unified mandatory standard requiring that a special air inlet hole for the test must be set on the cabin, in order to test the versatility and applicability of the equipment, it is best to place the air needed for the test inside the cabin in advance through a high-pressure storage tank.

[0005] Based on this, the present invention is the first to propose a test method of continuously releasing air into the cabin through a high-pressure gas tank. When the cabin reaches the stage of intake and exhaust phase equilibrium, the cabin pressure and intake and exhaust speed at this time are recorded, and after testing multiple sets of "pressure-leakage speed" data, the sealing of the cabin is fed back.

[0006] In fact, the test can be ended after the compressed gas stops releasing, but at this time it is necessary to further judge whether it is because the sealing of the cabin is too good, resulting in no gas leakage, or the sealing of the cabin is too poor, resulting in the compressed gas in the pressure storage tank being completely released and the interior of the cabin not reaching a state of equilibrium; in order to solve this problem, the present invention creatively proposes a dual-mode static detection mechanism, which can distinguish the above two situations at the moment of stopping the test through a dual judgment method.

[0007] The technical solution adopted by the present invention is as follows: The present invention proposes a cabin sealing test device for a substation, comprising an air pressure sensing balancing mechanism, a dual-mode static detection mechanism and a gas storage mechanism, wherein the dual-mode static detection mechanism is arranged between the air pressure sensing balancing mechanism and the gas storage mechanism; the air pressure sensing balancing mechanism comprises an exhaust rate regulating component, an in-cabin air pressure sensing component and a transmission component, wherein the in-cabin air pressure sensing component is arranged on the exhaust rate regulating component, and the transmission component is arranged on the in-cabin air pressure sensing component.

[0008] The air pressure sensing balance mechanism can sense the air pressure inside the cabin and automatically adjust the deflation rate to stabilize and balance the air pressure inside the cabin.

[0009] Furthermore, the exhaust rate regulating component includes a main bracket, an active valve seat, an automatic valve plate and an exhaust pipe, a circular fixing ring is provided inside the main bracket, the exhaust pipe is fixedly connected to the circular fixing ring, the active valve seat is rotatably arranged in the exhaust pipe, an end baffle is provided at the end of the active valve seat, an arc-shaped window is provided on the end baffle, the automatic valve plate is rotatably arranged on the active valve seat, a teardrop-shaped window matching the arc-shaped window is provided on the automatic valve plate, and an external gear portion is also provided on the periphery of the automatic valve plate.

[0010] When the active valve seat and the automatic valve plate rotate relative to each other, the overlapping area of ​​the arc window and the teardrop-shaped window also changes accordingly, thereby changing the speed of gas flow under stable pressure. The end of the teardrop-shaped window gradually narrows, which can improve the accuracy of the rotation adjustment of the automatic valve plate by the extension and retraction of the sensing piston rod before the valve disc is about to close, thereby achieving the technical effect of "fast and low-precision adjustment in the early stage of testing, and slow and high-precision adjustment in the later stage of testing".

[0011] Preferably, the cabin air pressure sensing assembly includes a cylinder mounting frame, an air pressure sensing cylinder, a sensing piston rod and an air pressure antagonizing spring, the cylinder mounting frame is fixedly connected to the bottom of the main bracket, the air pressure sensing cylinder is snap-fitted into the cylinder mounting frame, the sensing piston rod is snap-fitted and slidably disposed in the air pressure sensing cylinder, and the air pressure antagonizing spring is disposed between the piston portion of the sensing piston rod and the air pressure sensing cylinder.

[0012] The closed space composed of the sensing piston rod and the air pressure sensing cylinder is filled with a certain amount of gas and is not connected to the outside world. The air pressure in the current environment can be sensed by the sliding and lateral movement of the sensing piston rod, and the rotation of the automatic valve plate can be adjusted by the lateral movement of the transmission rack. Finally, when the gas leakage amount of the cabin matches the speed of gas release from the storage tank, the air pressure sensing balancing mechanism can maintain a relatively stable equilibrium state; the valve disc opening in the equilibrium state can be used to feedback the gas leakage rate of the cabin under the current pressure state, and then its sealing performance can be fed back.

[0013] When the active valve seat is actively rotated, when the above-mentioned equilibrium state is reached, the position of the automatic valve plate is also adjusted following the active valve seat, thereby changing the extension amplitude of the sensing piston rod in this state. At this time, the air pressure against the compression of the spring and the balance air pressure inside the cabin are also different from those before adjustment; therefore, by actively rotating the active valve seat, the balance air pressure during detection can be actively set, thereby obtaining multiple sets of "pressure-leakage rate" data, which is convenient for reflecting the sealing performance of the cabin.

[0014] Preferably, the transmission assembly includes a sealing ring, an L-shaped slide and a transmission rack, the sealing ring is arranged in the air pressure sensing cylinder, the sensing piston rod and the sealing ring are in sliding and sealing contact, the L-shaped slide is snap-fitted and slidably arranged on the cylinder mounting frame, the L-shaped slide and the sensing piston rod are fixedly connected, the transmission rack is fixedly connected to the L-shaped slide, and the transmission rack and the external gear part are meshed for transmission.

[0015] Furthermore, the dual-mode stationary detection mechanism includes a pneumatic sensing component, a residual air pressure sensing component and a dual-mode alarm component. The pneumatic sensing component is arranged on the storage tank connecting component, the residual air pressure sensing component is arranged in the pneumatic sensing component, and the dual-mode alarm component is arranged on the pneumatic sensing component and the residual air pressure sensing component.

[0016] The pneumatic sensing component can sense whether there is still gas flowing out of the pressure storage tank in the current state, and the residual air pressure sensing component can sense the outlet air pressure of the self-operated pressure reducing valve. Through the coordinated judgment of the two, it can be known whether there is still compressed gas inside the pressure storage tank when the gas stops flowing out of the pressure storage tank, so as to further judge whether the air flow is interrupted because the sealing of the cabin is too good, resulting in no gas leakage, or the sealing of the cabin is too poor, resulting in the complete release of the compressed gas in the pressure storage tank without allowing the cabin to reach a state of intake and exhaust phase balance.

[0017] Preferably, the pneumatic sensing assembly includes a stepped through-tube, a hollow spring seat, a pneumatic sensing block and a return spring, the stepped through-tube is fixedly connected to a circular fixed ring, the stepped through-tube and the exhaust pipe are coaxially arranged, the hollow spring seat is fixedly connected to the stepped through-tube, the pneumatic sensing block is snap-fitted and slidably arranged in the stepped through-tube, the return spring is arranged between the hollow spring seat and the pneumatic sensing block, and the outer ring of the pneumatic sensing block is evenly distributed with edge hollow portions.

[0018] Preferably, the residual air pressure sensing component includes a hollow sensing seat, a telescopic sleeve, a telescopic cover and an air pressure sensing spring, the hollow sensing seat is fixed in a step-shaped through pipe, the telescopic sleeve is fixed on the hollow sensing seat, the telescopic cover is snap-fitted and slidably arranged in the telescopic sleeve, and the air pressure sensing spring is arranged between the hollow sensing seat and the telescopic cover.

[0019] Preferably, the dual-mode alarm assembly includes a first annular contact, a first circular contact, a second annular contact, a second circular contact and a rod-shaped contact, the first annular contact and the first circular contact are fixed to the pneumatic sensing block, the second annular contact and the second circular contact are fixed to the hollow sensing seat, the first annular contact and the second annular contact are arranged opposite to each other, the first circular contact and the second circular contact are arranged opposite to each other, the rod-shaped contact is fixed to the telescopic cover, and the rod-shaped contact and the second circular contact are arranged opposite to each other.

[0020] Furthermore, the gas storage mechanism includes a pressure gas storage assembly and a storage tank connecting assembly, the storage tank connecting assembly is arranged on the pressure gas storage assembly, and the pressure gas storage assemblies are connected through the storage tank connecting assembly.

[0021] The compressed air stored in the pressure tank is used to increase the air pressure inside the cabin. Depending on the size of the cabin, different numbers of pressure tanks can be selected and connected in series to ensure that a sufficient amount of gas can be provided.

[0022] Preferably, the pressure gas storage assembly comprises a pressure storage tank, a storage tank rack and universal wheels, the pressure storage tank is provided with a pressure gauge, the pressure storage tank is arranged in the storage tank rack, and the universal wheel array is arranged at the bottom of the storage tank rack.

[0023] Preferably, the storage tank connection assembly comprises a series pipe, a plug and a self-operated pressure reducing valve, the series pipe is arranged between two pressure storage tanks, the plug is arranged on the pressure storage tank, the self-operated pressure reducing valve is arranged on the pressure storage tank, and the stepped through pipe is fixedly connected to the outer shell of the self-operated pressure reducing valve.

[0024] The beneficial effects achieved by the present invention using the above structure are as follows:

[0025] (1) The air pressure sensing balance mechanism can sense the air pressure inside the cabin and automatically adjust the deflation rate to stabilize and balance the air pressure inside the cabin.

[0026] (2) When the active valve seat and the automatic valve disc rotate relative to each other, the overlapping area of ​​the arc-shaped window and the teardrop-shaped window also changes accordingly, thereby changing the speed of gas flow under stable pressure. The end of the teardrop-shaped window gradually narrows, which can improve the accuracy of the rotation adjustment of the automatic valve disc by the extension and retraction of the sensing piston rod before the valve disc is about to close, thereby achieving the technical effect of "fast and low-precision adjustment in the early stage of the test, and slow and high-precision adjustment in the later stage of the test".

[0027] (3) The closed space formed by the sensing piston rod and the air pressure sensing cylinder is filled with a certain amount of gas and is not connected to the outside world. The air pressure in the current environment can be sensed by the sliding and lateral movement of the sensing piston rod, and the rotation of the automatic valve plate can be adjusted by the lateral movement of the transmission rack. Finally, when the gas leakage of the cabin matches the speed of gas release from the storage tank, the air pressure sensing balance mechanism can maintain a relatively stable equilibrium state; the valve disc opening in the equilibrium state can feedback the gas leakage rate of the cabin under the current pressure state, and then feedback its sealing performance.

[0028] (4) When the active valve seat is actively rotated, when the above-mentioned equilibrium state is reached, the position of the automatic valve plate is also adjusted along with the active valve seat, thereby changing the extension amplitude of the sensing piston rod in this state. At this time, the air pressure against the compression of the spring and the equilibrium air pressure inside the cabin are also different from those before adjustment; therefore, by actively rotating the active valve seat, the equilibrium air pressure during detection can be actively set, thereby obtaining multiple sets of "pressure-leakage rate" data, which is convenient for reflecting the sealing performance of the cabin.

[0029] (5) The pneumatic sensing component can sense whether there is still gas flowing out of the pressure storage tank in the current state, and the residual air pressure sensing component can sense the outlet air pressure of the self-operated pressure reducing valve. Through the combined judgment of the two, it can be known whether there is still compressed gas inside the pressure storage tank when the gas stops flowing out of the pressure storage tank, so as to further judge whether the air flow is cut off because the airtightness of the cabin is too good, resulting in no gas leakage, or the airtightness of the cabin is too poor, resulting in the compressed gas in the pressure storage tank being completely released without allowing the cabin to reach the state of intake and exhaust phase balance.

[0030] (6) Compressed air stored in pressure storage tanks is used to increase the air pressure inside the cabin. Depending on the size of the cabin, different numbers of pressure storage tanks can be selected and connected in series to ensure that a sufficient amount of gas can be provided. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A three-dimensional diagram of a cabin sealing test device for a transformer cabinet proposed by the present invention;

[0032] Figure 2 This is a front view of a cabin sealing test device for a transformer cabinet proposed by the present invention;

[0033] Figure 3 A top view of a cabin sealing test device for a transformer cabinet proposed by the present invention;

[0034] Figure 4 for Figure 2 A cross-sectional view along the cutting line AA;

[0035] Figure 5 for Figure 4 A cross-sectional view along the cutting line BB;

[0036] Figure 6 for Figure 4 A cross-sectional view along the cutting line CC;

[0037] Figure 7 This is an explosion diagram of a cabin sealing test device for a transformer cabinet proposed by the present invention;

[0038] Figure 8 for Figure 4 A partial enlarged view of point Ⅰ in the middle;

[0039] Fig. 9 for Figure 5 A partial enlarged view of the middle II;

[0040] Fig.10 for Figure 7 A partial enlarged view of the middle part III;

[0041] Fig.11 for Figure 7 A partial enlarged view of point IV in the middle.

[0042] Among them, 1. Air pressure sensing balance mechanism, 2. Dual-mode static detection mechanism, 3. Gas storage mechanism, 4. Exhaust rate adjustment component, 5. Cabin air pressure sensing component, 6. Transmission component, 7. Main bracket, 8. Active valve seat, 9. Automatic valve plate, 10. Cylinder mounting frame, 11. Air pressure sensing cylinder, 12. Sensing piston rod, 13. Air pressure counteracting spring, 14. Sealing ring, 15. L-shaped slide plate, 16. Transmission rack, 17. Circular fixing ring, 18. End baffle, 19. Arc window, 20. Water drop-shaped window, 21. External gear part, 22. Pneumatic sensing component, 23. Residual air pressure sensing component, 24. Dual-mode Alarm assembly, 25. Step-shaped through pipe, 26. Hollow spring seat, 27. Pneumatic sensor block, 28. Reset spring, 29. Hollow sensor seat, 30. Telescopic sleeve, 31. Telescopic cover, 32. Air pressure sensing spring, 33. First annular contact, 34. First circular contact, 35. Second annular contact, 36. Second circular contact, 37. Rod-shaped contact, 38. Edge hollow part, 39. Pressure gas storage assembly, 40. Storage tank connection assembly, 41. Pressure storage tank, 42. Storage tank placement rack, 43. Universal wheel, 44. Series pipeline, 45. Plug, 46. Self-operated pressure reducing valve, 47. Pressure gauge, 48. Exhaust pipe.

[0043] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention. DETAILED DESCRIPTION

[0044] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0045] In the description of the present invention, it should be understood that terms such as “upper”, “lower”, “front”, “back”, “left”, “right”, “top”, “bottom”, “inside” and “outside” indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0046] like Figure 1 to Figure 11 As shown, the present invention proposes a cabin sealing test device for a transformer cabinet, comprising an air pressure sensing balancing mechanism 1, a dual-mode static detection mechanism 2 and a gas storage mechanism 3, wherein the dual-mode static detection mechanism 2 is arranged between the air pressure sensing balancing mechanism 1 and the gas storage mechanism 3; the air pressure sensing balancing mechanism 1 comprises an exhaust rate regulating component 4, an in-cabin air pressure sensing component 5 and a transmission component 6, wherein the in-cabin air pressure sensing component 5 is arranged on the exhaust rate regulating component 4, and the transmission component 6 is arranged on the in-cabin air pressure sensing component 5.

[0047] The air pressure sensing balancing mechanism 1 can sense the air pressure inside the cabin and automatically adjust the deflation rate to stabilize and balance the air pressure inside the cabin.

[0048] The exhaust rate regulating component 4 includes a main bracket 7, an active valve seat 8, an automatic valve plate 9 and an exhaust pipe 48. A circular fixing ring 17 is provided inside the main bracket 7. The exhaust pipe 48 is fixedly connected to the circular fixing ring 17. The active valve seat 8 is rotatably arranged in the exhaust pipe 48. An end baffle 18 is provided at the end of the active valve seat 8. An arc-shaped window 19 is provided on the end baffle 18. The automatic valve plate 9 is rotatably arranged on the active valve seat 8. A teardrop-shaped window 20 matching the arc-shaped window 19 is provided on the automatic valve plate 9. An external gear portion 21 is also provided on the periphery of the automatic valve plate 9.

[0049] When the active valve seat 8 and the automatic valve plate 9 rotate relative to each other, the overlapping area of ​​the arc window 19 and the teardrop-shaped window 20 also changes accordingly, thereby changing the speed of gas flow under stable pressure, and the end of the teardrop-shaped window 20 gradually narrows, which can improve the accuracy of the rotation adjustment of the automatic valve plate 9 by the extension and contraction of the sensing piston rod 12 before the valve disc is about to close, thereby achieving the technical effect of "fast and low-precision adjustment in the early stage of testing, and slow and high-precision adjustment in the later stage of testing".

[0050] The cabin air pressure sensing assembly 5 includes a cylinder mounting frame 10, an air pressure sensing cylinder 11, a sensing piston rod 12 and an air pressure antagonizing spring 13. The cylinder mounting frame 10 is fixedly connected to the bottom of the main bracket 7, the air pressure sensing cylinder 11 is snap-fitted into the cylinder mounting frame 10, the sensing piston rod 12 is snap-fitted and slidably disposed in the air pressure sensing cylinder 11, and the air pressure antagonizing spring 13 is disposed between the piston portion of the sensing piston rod 12 and the air pressure sensing cylinder 11.

[0051] The closed space formed by the sensing piston rod 12 and the air pressure sensing cylinder 11 is filled with a certain amount of gas and is not connected to the outside world. The air pressure in the current environment can be sensed by the sliding and lateral movement of the sensing piston rod 12, and the rotation of the automatic valve plate 9 can be adjusted by the lateral movement of the transmission rack 16. Finally, when the gas leakage amount of the cabin matches the speed of gas release from the storage tank, the air pressure sensing balancing mechanism 1 can maintain a relatively stable equilibrium state; the valve disc opening in the equilibrium state can be used to feedback the gas leakage rate of the cabin under the current pressure state, and then feedback its sealing performance.

[0052] When the active valve seat 8 is actively rotated, when the above-mentioned equilibrium state is reached, the position of the automatic valve plate 9 is also adjusted following the active valve seat 8, thereby changing the extension amplitude of the sensing piston rod 12 in this state. At this time, the compression amount of the air pressure against the spring 13 and the equilibrium air pressure inside the cabin are also different from those before adjustment; therefore, by actively rotating the active valve seat 8, the equilibrium air pressure during detection can be actively set, thereby obtaining multiple sets of "pressure-leakage rate" data, which is convenient for reflecting the sealing performance of the cabin.

[0053] The transmission assembly 6 includes a sealing ring 14, an L-shaped slide plate 15 and a transmission rack 16. The sealing ring 14 is arranged in the air pressure sensing cylinder 11. The sensing piston rod 12 and the sealing ring 14 are in sliding and sealing contact. The L-shaped slide plate 15 is slidably arranged on the cylinder mounting frame 10. The L-shaped slide plate 15 and the sensing piston rod 12 are fixedly connected. The transmission rack 16 is fixedly connected to the L-shaped slide plate 15. The transmission rack 16 and the external gear part 21 are meshed for transmission.

[0054] The dual-mode stationary detection mechanism 2 includes a pneumatic sensing component 22, a residual air pressure sensing component 23 and a dual-mode alarm component 24. The pneumatic sensing component 22 is arranged on the tank connecting component 40, the residual air pressure sensing component 23 is arranged on the pneumatic sensing component 22, and the dual-mode alarm component 24 is arranged on the pneumatic sensing component 22 and the residual air pressure sensing component 23.

[0055] The pneumatic sensing component 22 can sense whether there is still gas flowing out of the pressure storage tank 41 in the current state, and the residual air pressure sensing component 23 can sense the outlet air pressure of the self-operated pressure reducing valve 46. Through the coordinated judgment of the two, it can be known whether there is still compressed gas in the pressure storage tank 41 when the gas stops flowing out of the pressure storage tank 41, so as to further judge whether the air flow is interrupted because the sealing of the cabin is too good, resulting in no gas leakage, or the sealing of the cabin is too poor, resulting in the compressed gas in the pressure storage tank 41 being completely released without allowing the cabin to reach a state of intake and exhaust phase balance.

[0056] The pneumatic sensing assembly 22 includes a stepped through-tube 25, a hollow spring seat 26, a pneumatic sensing block 27 and a return spring 28. The stepped through-tube 25 is fixedly connected to the circular fixing ring 17. The stepped through-tube 25 and the exhaust pipe 48 are coaxially arranged. The hollow spring seat 26 is fixedly connected to the stepped through-tube 25. The pneumatic sensing block 27 is slidably arranged in the stepped through-tube 25. The return spring 28 is arranged between the hollow spring seat 26 and the pneumatic sensing block 27. The outer ring of the pneumatic sensing block 27 is evenly distributed with edge hollow portions 38.

[0057] The residual air pressure sensing assembly 23 includes a hollow sensing seat 29, a telescopic sleeve 30, a telescopic cover 31 and an air pressure sensing spring 32. The hollow sensing seat 29 is fixedly connected to the step-shaped through pipe 25, the telescopic sleeve 30 is fixedly connected to the hollow sensing seat 29, the telescopic cover 31 is slidably engaged in the telescopic sleeve 30, and the air pressure sensing spring 32 is arranged between the hollow sensing seat 29 and the telescopic cover 31.

[0058] The dual-mode alarm assembly 24 includes a first annular contact 33, a first circular contact 34, a second annular contact 35, a second circular contact 36 and a rod-shaped contact 37. The first annular contact 33 and the first circular contact 34 are fixedly connected to the pneumatic sensing block 27, the second annular contact 35 and the second circular contact 36 are fixedly connected to the hollow sensing seat 29, the first annular contact 33 and the second annular contact 35 are arranged opposite to each other, the first circular contact 34 and the second circular contact 36 are arranged opposite to each other, the rod-shaped contact 37 is fixedly connected to the telescopic cover 31, and the rod-shaped contact 37 and the second circular contact 36 are arranged opposite to each other.

[0059] The gas storage mechanism 3 includes a pressure gas storage assembly 39 and a storage tank connecting assembly 40 . The storage tank connecting assembly 40 is arranged on the pressure gas storage assembly 39 , and the pressure gas storage assemblies 39 are connected through the storage tank connecting assembly 40 .

[0060] The compressed air stored in the pressure storage tank 41 is used to increase the air pressure inside the cabin. Depending on the size of the cabin, different numbers of pressure storage tanks 41 can be selected to be connected in series to ensure that a sufficient amount of gas can be provided.

[0061] The pressure gas storage assembly 39 includes a pressure storage tank 41, a storage tank rack 42 and a universal wheel 43. The pressure storage tank 41 is provided with a pressure gauge 47. The pressure storage tank 41 is arranged in the storage tank rack 42. The universal wheel 43 array is arranged at the bottom of the storage tank rack 42.

[0062] The storage tank connection assembly 40 includes a series pipe 44, a plug 45 and a self-operated pressure reducing valve 46. The series pipe 44 is arranged between two pressure storage tanks 41, the plug 45 is arranged on the pressure storage tank 41, the self-operated pressure reducing valve 46 is arranged on the pressure storage tank 41, and the stepped through pipe 25 and the outer shell of the self-operated pressure reducing valve 46 are fixedly connected.

[0063] During specific use, the user first needs to place the device in a container-type cabin, and the operator opens the self-operated pressure-reducing valve 46 and exits the cabin. At this time, all doors and windows that can be closed can be closed; under the restriction of the self-operated pressure-reducing valve 46, even if the internal air pressure of the pressure storage tank 41 is high, the gas will pass through the self-operated pressure-reducing valve 46 at a relatively low and stable pressure and enter the dual-mode stationary detection mechanism 2 and the air pressure sensing balancing mechanism 1.

[0064] In the initial state, since the air pressure in the chamber can be regarded as a standard atmospheric pressure, the pressure is relatively small. At this time, the overlapping area of ​​the arc-shaped window 19 and the water-drop-shaped window 20 is the largest, and the gas is discharged from the inside of the pressure storage tank 41 into the chamber at the fastest speed; as the pressure inside the chamber increases, the gas will overcome the elastic force of the air pressure antagonistic spring 13 and the internal pressure of the air pressure sensing tube 11 to push the sensing piston rod 12 out toward the outside of the air pressure sensing tube 11, and at this time, the transmission rack 16 will also slide horizontally under the linkage of the L-shaped slide plate 15;

[0065] Due to the meshing of the external gear portion 21 and the transmission rack 16, the transmission rack 16 will rotate with the automatic valve plate 9 when sliding horizontally. At this time, the overlapping area of ​​the arc window 19 and the teardrop-shaped window 20 gradually shrinks; as the internal pressure of the cabin gradually increases, the exhaust speed of the pressure storage tank 41 is gradually decreasing, so the automatic valve plate 9 will eventually remain stationary in a balanced state. In this state: the internal pressure of the cabin is greater than a standard atmospheric pressure, and the speed at which the gas enters the cabin from the pressure storage tank 41 is equal to the speed at which the gas leaks from the cabin to the outside world.

[0066] The sensor can sense the relative rotation of the active valve seat 8 and the automatic valve plate 9. When the automatic valve plate 9 is stationary for a period of time, the two data of the cabin pressure and the gas leakage rate during this period of stationary time can be recorded. The cabin pressure can be fed back by sensing the extension amplitude of the piston rod 12 relative to the air pressure sensing tube 11. The overlapping area of ​​the arc window 19 and the teardrop-shaped window 20 can be known through the relative angle between the automatic valve plate 9 and the active valve seat 8. Combined with the exhaust pressure of the self-operated pressure reducing valve 46, the gas leakage rate of the cabin in this state can be known.

[0067] Then, the active valve seat 8 is actively rotated and re-measured. When the above-mentioned equilibrium state is reached again, the position of the automatic valve plate 9 is also adjusted following the active valve seat 8, thereby changing the extension amplitude of the sensing piston rod 12 in this state. At this time, the compression amount of the air pressure against the spring 13 and the equilibrium air pressure inside the cabin are also different from those before adjustment. Therefore, by actively rotating the active valve seat 8, the equilibrium air pressure during detection can be actively set, thereby obtaining multiple sets of "pressure-leakage rate" data, which is convenient for reflecting the sealing performance of the cabin.

[0068] In fact, after the compressed gas stops releasing, the test can be ended. However, it is necessary to further judge whether it is because the airtightness of the cabin is too good, resulting in no gas leakage, or the airtightness of the cabin is too poor, resulting in the compressed gas in the pressure storage tank 41 not being completely released to allow the cabin to reach a balanced state.

[0069] The above two situations are respectively: first, when the gas in the pressure storage tank 41 is not completely released, but because the airtightness of the cabin is too good, the pressure in the cabin has risen to a level sufficient to close the valve core composed of the active valve seat 8 and the automatic valve plate 9, and the gas in the pressure storage tank 41 cannot flow out; when there is no gas passing through, the pneumatic sensing block 27 presses against the step of the stepped through pipe 25 under the elastic force of the return spring 28, and the first annular contact 33 and the second annular contact 35 are in contact, which is recorded as X=1. At this time, since the inside of the stepped through pipe 25 still has a relatively high pressure, the telescopic cover 31 is still in a state of being retracted in the pressure gas storage assembly 39, and the first circular contact 34 and the rod-shaped contact 37 are in indirect contact through the second circular contact 36, which is recorded as Y=1;

[0070] Second, when the gas in the pressure storage tank 41 has been completely released, but the airtightness of the cabin is too poor, the gas completely leaks to the outside of the cabin. At this time, the valve core composed of the active valve seat 8 and the automatic valve plate 9 still remains in an open state; when no gas passes through, the pneumatic sensing block 27 presses against the step of the stepped through pipe 25 under the elastic force of the reset spring 28. At this time, the first annular contact 33 and the second annular contact 35 are in contact, which is recorded as X=1. At this time, since the internal pressure of the stepped through pipe 25 has been reduced, the telescopic cover 31 is in a state of extending from the telescopic sleeve 30 under the elastic force of the air pressure sensing spring 32. At this time, the first circular contact 34 and the rod-shaped contact 37 are not in indirect contact through the second circular contact 36, which is recorded as Y=0.

[0071] Therefore, when executing the judgment, if X=1 and Y=1, it means that the cabin is well sealed and the test can be ended early; if X=1 and Y=0, it means that the cabin is not sealed and the test is ended; if the above two situations do not occur, but each test outputs a set of "pressure-leakage rate" data, then the cabin's sealing is fed back based on multiple sets of "pressure-leakage rate" data.

[0072] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0073] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A device for testing the sealing performance of a transformer compartment, characterized in that: The invention comprises a gas pressure sensing balancing mechanism (1), a dual-mode static detection mechanism (2) and a gas storage mechanism (3); the gas storage mechanism (3) comprises a pressure gas storage assembly (39) and a storage tank connection assembly (40); the storage tank connection assembly (40) is arranged on the pressure gas storage assembly (39); the pressure gas storage assemblies (39) are connected to each other via the storage tank connection assembly (40); and the dual-mode static detection mechanism (2) is arranged between the gas pressure sensing balancing mechanism (1) and the gas storage mechanism (3); The air pressure sensing balancing mechanism (1) comprises an exhaust rate regulating component (4), an in-cabin air pressure sensing component (5) and a transmission component (6), wherein the in-cabin air pressure sensing component (5) is arranged on the exhaust rate regulating component (4), and the transmission component (6) is arranged on the in-cabin air pressure sensing component (5).

2. The device for testing the sealing performance of a transformer compartment according to claim 1, characterized in that: The exhaust rate regulating component (4) comprises a main support (7), an active valve seat (8), an automatic valve plate (9) and an exhaust pipe (48), wherein a circular fixing ring (17) is provided inside the main support (7), the exhaust pipe (48) is fixedly connected to the circular fixing ring (17), the active valve seat (8) is rotatably arranged in the exhaust pipe (48), an end baffle (18) is provided at the end of the active valve seat (8), an arc-shaped window (19) is provided on the end baffle (18), the automatic valve plate (9) is rotatably arranged on the active valve seat (8), the automatic valve plate (9) is provided with a water drop-shaped window (20) matching the arc-shaped window (19), and an external gear portion (21) is also provided on the periphery of the automatic valve plate (9).

3. The device for testing the sealing performance of a transformer cabinet according to claim 2, characterized in that: The cabin air pressure sensing component (5) comprises a cylinder mounting frame (10), an air pressure sensing cylinder (11), a sensing piston rod (12) and an air pressure antagonizing spring (13); the cylinder mounting frame (10) is fixedly connected to the bottom of the main bracket (7); the air pressure sensing cylinder (11) is snap-fitted into the cylinder mounting frame (10); the sensing piston rod (12) is snap-fitted and slidably disposed in the air pressure sensing cylinder (11); and the air pressure antagonizing spring (13) is disposed between the piston portion of the sensing piston rod (12) and the air pressure sensing cylinder (11).

4. The device for testing the sealing performance of a transformer compartment according to claim 3, characterized in that: The transmission assembly (6) comprises a sealing ring (14), an L-shaped slide plate (15) and a transmission rack (16); the sealing ring (14) is arranged in the air pressure sensing cylinder (11); the sensing piston rod (12) and the sealing ring (14) are in sliding and sealing contact; the L-shaped slide plate (15) is slidably arranged on the cylinder mounting frame (10); the L-shaped slide plate (15) and the sensing piston rod (12) are fixedly connected; the transmission rack (16) is fixedly connected to the L-shaped slide plate (15); and the transmission rack (16) and the external gear part (21) are meshed for transmission.

5. The device for testing the sealing performance of a transformer compartment according to claim 4, characterized in that: The dual-mode stationary detection mechanism (2) comprises a pneumatic sensing component (22), a residual air pressure sensing component (23) and a dual-mode alarm component (24); the pneumatic sensing component (22) is arranged on a storage tank connection component (40); the residual air pressure sensing component (23) is arranged in the pneumatic sensing component (22); and the dual-mode alarm component (24) is arranged on the pneumatic sensing component (22) and the residual air pressure sensing component (23).

6. The device for testing the sealing performance of a transformer compartment according to claim 5, characterized in that: The pneumatic sensing assembly (22) comprises a stepped through pipe (25), a hollow spring seat (26), a pneumatic sensing block (27) and a return spring (28); the stepped through pipe (25) is fixedly connected to a circular fixing ring (17); the stepped through pipe (25) and an exhaust pipe (48) are coaxially arranged; the hollow spring seat (26) is fixedly connected to the stepped through pipe (25); the pneumatic sensing block (27) is slidably arranged in the stepped through pipe (25); the return spring (28) is arranged between the hollow spring seat (26) and the pneumatic sensing block (27); and the outer ring of the pneumatic sensing block (27) is evenly distributed with edge hollow portions (38).

7. The device for testing the sealing performance of a transformer compartment according to claim 6, characterized in that: The residual air pressure sensing component (23) comprises a hollow sensing seat (29), a telescopic sleeve (30), a telescopic cover (31) and an air pressure sensing spring (32); the hollow sensing seat (29) is fixedly connected to the step-shaped through pipe (25); the telescopic sleeve (30) is fixedly connected to the hollow sensing seat (29); the telescopic cover (31) is slidably arranged in the telescopic sleeve (30); and the air pressure sensing spring (32) is arranged between the hollow sensing seat (29) and the telescopic cover (31).

8. The device for testing the sealing performance of a transformer compartment according to claim 7, characterized in that: The dual-mode alarm assembly (24) comprises a first annular contact (33), a first circular contact (34), a second annular contact (35), a second circular contact (36) and a rod-shaped contact (37); the first annular contact (33) and the first circular contact (34) are fixedly connected to the pneumatic sensing block (27); the second annular contact (35) and the second circular contact (36) are fixedly connected to the hollow sensing seat (29); the first annular contact (33) and the second annular contact (35) are arranged opposite to each other; the first circular contact (34) and the second circular contact (36) are arranged opposite to each other; the rod-shaped contact (37) is fixedly connected to the telescopic cover (31); and the rod-shaped contact (37) and the second circular contact (36) are arranged opposite to each other.

9. The device for testing the sealing performance of a transformer compartment according to claim 8, characterized in that: The pressure gas storage assembly (39) comprises a pressure storage tank (41), a storage tank placement rack (42) and universal wheels (43); a pressure gauge (47) is provided on the pressure storage tank (41); the pressure storage tank (41) is arranged in the storage tank placement rack (42); and an array of universal wheels (43) is arranged at the bottom of the storage tank placement rack (42).

10. The device for testing the sealing performance of a transformer compartment according to claim 9, characterized in that: The storage tank connection assembly (40) comprises a series pipe (44), a plug (45) and a self-operated pressure reducing valve (46); the series pipe (44) is arranged between two pressure storage tanks (41); the plug (45) is arranged on the pressure storage tank (41); the self-operated pressure reducing valve (46) is arranged on the pressure storage tank (41); and the stepped through pipe (25) and the outer shell of the self-operated pressure reducing valve (46) are fixedly connected.

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