Monitoring device of oil immersed transformer

Abstract

The invention belongs to the technical field of monitoring protection equipment, and particularly discloses an oil immersed transformer monitoring device which comprises an oil immersed transformer and an oil conservator, the oil conservator is fixed to the side wall of the oil immersed transformer through a supporting frame, a mounting pipe is arranged on the lower portion of the oil conservator, and a gas relay is arranged at the lower end of the mounting pipe. The gas relay is connected with the oil immersed transformer through an oil pipe, and a hydraulic oil leakage alarm assembly is arranged in the oil conservator. Different amounts of generated gas are used as the judgment basis of different states, in the normal operation state, the amount of generated gas is very small, the gas is automatically released, the transformer is powered off when the gas is heavy, an oil leakage alarm is given in the oil leakage state, and misoperation caused by external factors such as earthquakes is avoided.

Description

Technical Field

[0001] The present invention belongs to the technical field of monitoring and protection equipment, and specifically refers to a monitoring device for oil-immersed transformers. Background Art

[0002] A gas relay is a monitoring and protection device used in oil-immersed transformers. It is installed in the pipeline between the oil conservator and the oil tank of the oil-immersed transformer. When a fault occurs inside the transformer, the transformer oil decomposes to generate gas or causes oil surging. The gas or oil surging causes the contacts of the gas relay to actuate, connects the specified control circuit, and promptly issues a signal warning or activates a protection element to automatically cut off the transformer.

[0003] For a general baffle-type gas relay, the contact action during heavy gas is instantaneous. After the baffle is pushed by the oil flow to make the reed switch close and send a signal, it will return to its original position, that is, it cannot maintain the fault state. During heavy gas, a light gas signal warning will also occur. In the case of oil leakage, an alarm signal will only be issued when the oil level of the hydraulic oil is lower than the height of the light gas float. At this time, the alarm signal is the same as that of low gas. When the oil level is lower than the height of the heavy gas float, the transformer will be cut off. At this time, it is the same as the fault signal of heavy gas, which increases the difficulty of troubleshooting transformer faults. In addition, when encountering external environmental interferences such as earthquakes, an oil flow is formed inside the gas relay, pushing the baffle to make the reed switch close and send a signal, which easily causes misoperation.

[0004] Therefore, a monitoring device for oil-immersed transformers is needed to solve the above problems. Summary of the Invention

[0005] In view of the above situation, to overcome the defects of the prior art, the present invention provides a monitoring device for oil-immersed transformers, which uses the different amounts of generated gas as the judgment basis for different states. Under normal operating conditions, the generated gas is very little, and the gas is automatically released. During heavy gas, the transformer is powered off. During the oil leakage state, an oil leakage alarm is issued to avoid misoperation caused by external factors such as earthquakes.

[0006] The technical solution adopted by the present invention is as follows: The present invention provides a monitoring device for oil-immersed transformers, including an oil-immersed transformer and an oil conservator. The oil conservator is fixed on the side wall of the oil-immersed transformer through a support frame. An installation pipe is provided at the lower part of the oil conservator. A gas relay is provided at the lower end of the installation pipe. The gas relay is connected to the oil-immersed transformer through an oil pipe. A hydraulic oil leakage alarm component is provided inside the oil conservator; The gas relay includes a housing body. Inside the housing body, there are a light gas automatic release component, a guiding baffle wall, and a heavy gas power-off protection component. The heavy gas power-off protection component is arranged on the light gas automatic release component and the guiding baffle wall. An air release component is provided on the upper wall of the housing body; The light gas automatic release component includes a gas collecting plate, a hollow floating ball, a push rod, a hinge frame, and a magnetic attraction opening component. The gas collecting plate is arranged on the inner side wall of the outer casing. The gas collecting plate inclines downward. The magnetic attraction opening component is arranged on the gas collecting plate. The hinge frames are symmetrically arranged on both sides of the lower end of the gas collecting plate. The push rod is rotatably arranged on the hinge frame through a shaft. The hollow floating ball is arranged at the upper end of the push rod. The hollow floating ball is made of a magnetic material; The heavy gas power-off protection component includes a vertical movement component and a control cylinder. The vertical movement component is slidably arranged on the pressure rod and the guiding retaining wall. The control cylinder is arranged on the lower wall of the guiding retaining wall. Oil leakage electrical contacts are symmetrically arranged on the lower part of the inner wall of the control cylinder. Heavy gas electrical contacts are symmetrically arranged on the upper part of the inner wall of the control cylinder.

[0007] Further, the magnetic attraction opening component includes a sealing stop rod and a rotating shaft. A through groove is arranged on the upper wall of the gas collecting plate. Rotating grooves are symmetrically arranged on both sides of the through groove at the lower end of the gas collecting plate. The rotating shaft penetrates through the lower end of the gas collecting plate. The rotating shaft penetrates through the through groove and the rotating groove. The sealing stop rod is rotatably arranged in the through groove. One end of the sealing stop rod is rotatably arranged on the rotating shaft through a torsion spring. A magnetic attraction layer is arranged on the lower wall of the sealing stop rod.

[0008] Further, the vertical movement component includes a pressure rod, a sliding shaft, a limiting plate, a guiding vertical rod, a stop shaft, a conductive ball, and a control spring. Rotating frames are symmetrically arranged at one end of the pressure rod. The rotating frames are rotatably arranged on the rotating shaft between the rotating grooves. A sliding groove is penetrated through the side wall of the pressure rod. The sliding shaft is slidably arranged in the sliding groove. The limiting plate is arranged at one end of the sliding shaft. The guiding vertical rod is penetrated and slidably arranged on the guiding retaining wall. The upper end of the guiding vertical rod is arranged at the other end of the sliding shaft. The stop shaft is arranged on the outer wall of the guiding vertical rod. The lower end of the guiding vertical rod is inside the control cylinder. The conductive ball is arranged at the lower end of the guiding vertical rod. The conductive ball is inside the control cylinder. The lower end of the control spring is arranged on the inner bottom wall of the control cylinder. The upper end of the control spring is connected to the conductive ball.

[0009] Further, the hydraulic oil leakage alarm component includes a floating ball, a suspension rope, a supporting sliding rod, a retaining ring, a cross bar, and a weight ball. The cross bar is arranged on the inner wall of the installation pipe. The supporting sliding rod is penetrated through the cross bar. The weight ball is arranged at the lower end of the supporting sliding rod. The weight ball is arranged below the cross bar. The lower end of the suspension rope is arranged at the upper end of the supporting sliding rod. The floating ball is arranged at the upper end of the suspension rope. The retaining ring is arranged at the upper end of the supporting sliding rod. The weight ball is vertically aligned with the pressure rod.

[0010] Further, the gas release assembly includes an opening shaft, an opening spring, a spring baffle, a guiding frame, a linkage shaft and a gas baffle. The opening shaft penetrates through the upper wall of the outer casing. The spring baffle is arranged at the upper end of the opening shaft. The opening spring is sleeved on the opening shaft. The two ends of the opening spring are respectively arranged at the lower end of the spring baffle and the upper wall of the outer casing. A gas release groove is downwardly extended and arranged on the outer wall upper end of the opening shaft. The guiding frames are symmetrically arranged on the upper wall of the sealing rod. The lower end of the opening shaft is arranged between the two guiding frames. The linkage shaft penetrates through the lower end of the opening shaft. The linkage shaft is slidably arranged in the guiding frame. The gas baffle is arranged on the inner top wall of the outer casing.

[0011] Further, one side of the through groove close to the inner wall of the outer casing is arc-shaped. The upper end of the sealing rod is arc-shaped. The upper end of the sealing rod is matched with the arc-shaped end of the through groove.

[0012] Further, a communication hole penetrates through the side wall of the outer casing.

[0013] Further, a balance air hole is arranged inside the guiding baffle wall. The inner end of the balance air hole is communicated with the control cylinder. The outer end of the balance air hole is communicated with the communication hole.

[0014] Further, the lower wall of the guiding baffle wall is inclined.

[0015] The beneficial effects achieved by the present invention adopting the above structure are as follows: 1. When the oil-immersed transformer operates normally, the gas normally decomposed from the hydraulic oil enters the outer casing through the oil pipe. The gas floats upward along the lower side of the guiding baffle wall to the gas collecting plate. When the gas accumulates to a certain amount, the gas presses down the oil surface at the gas collecting plate. The hollow floating ball follows the oil surface to descend. The magnetic adsorption layer adsorbs the hollow floating ball. The hollow floating ball drives the sealing rod to rotate downward. When the upper end of the sealing rod separates from the upper end of the through groove, the gas enters between the gas baffle, the outer casing and the gas collecting plate. At the same time, the sealing rod drives the opening shaft to move downward. The gas is discharged from the gas release groove, and there is no need to alarm. The gas generated under the normal operation state is directly released. 2. When a short-circuit fault occurs inside the oil-immersed transformer, the high-temperature electric arc at the fault point causes a large amount of gas in the hydraulic oil. The gas enters the lower side of the gas collecting plate along the guiding baffle wall. Due to the large accumulation of gas, the gap between the upper end of the sealing rod and the upper end of the through groove cannot discharge the gas in time. Thus, the oil surface under the gas collecting plate continues to descend. The hollow floating ball is separated from the sealing rod. The hollow floating ball drives the push rod to rotate. After the push rod contacts the blocking shaft, it pushes the blocking shaft upward. The blocking shaft drives the guiding vertical rod and the conductive ball to move upward. At this time, the conductive ball moves upward to the heavy gas electric contact piece. The two heavy gas electric contact pieces are connected. The heavy gas electric contact piece is electrically connected with an external signal device. The signal device sends a signal to the controller. The controller opens the circuit of the oil-immersed transformer. 3. When the oil-immersed transformer leaks oil, the oil level in the oil conservator drops, the floating ball follows the oil level down, the support slide bar and the plumb bob move downward under the action of gravity. When the plumb bob drops to the pressure bar, the plumb bob drives the pressure bar, the sliding shaft and the guiding vertical bar to move downward, and the guiding vertical bar drives the conductive ball to press down the control spring. When the conductive ball drops to the oil leakage electrical contact piece, the two oil leakage electrical contact pieces are electrically connected to the external signal device, and the controller controls the external alarm device to give an alarm warning to notify the maintenance personnel for repair. Description of the Drawings

[0016] Figure 1 Schematic diagram of the assembly position of a monitoring device for an oil-immersed transformer proposed by the present invention; Figure 2 Internal structure schematic diagram of the oil conservator and the gas relay; Figure 3 Internal structure schematic diagram of the gas relay; Figure 4 Front three-dimensional structure schematic diagram of the light gas automatic release component and the heavy gas power-off protection component; Figure 5 Reverse three-dimensional structure schematic diagram of the light gas automatic release component and the heavy gas power-off protection component; Figure 6 Internal structure schematic diagram of the control cylinder; Figure 7 Structure schematic diagram of the hydraulic oil leakage alarm component; Figure 8 For Figure 3 Enlarged view of part A in Figure 9 For Figure 3 Enlarged view of part B in

[0017] Among them, 1. oil-immersed transformer, 2. oil conservator, 3. support frame, 4. installation pipe, 5. gas relay, 6. oil pipe, 7. hydraulic oil leakage alarm assembly, 8. outer shell, 9. light gas automatic release assembly, 10. guiding baffle, 11. heavy gas power-off protection assembly, 12. gas release assembly, 13. gas collecting plate, 14. sealing rod, 15. hollow floating ball, 16. rotating shaft, 17. push rod, 18. articulated frame, 19. through groove, 20. rotating groove, 21. magnetic attraction layer, 22. pressing rod, 23. sliding shaft, 24. limiting plate, 25. guiding vertical rod, 26. blocking shaft, 27. conductive ball, 28. control spring, 29. control cylinder, 30. rotating frame, 31. sliding groove, 32. floating ball, 33. suspension rope, 34. supporting sliding rod, 35. retaining ring, 36. cross bar, 37. weight ball, 38. opening shaft, 39. opening spring, 40. spring baffle, 41. guiding frame, 42. linkage shaft, 43. gas blocking plate, 44. gas release groove, 45. oil leakage electrical contact piece, 46. heavy gas electrical contact piece, 47. communication hole, 48. balance air hole, 49. magnetic attraction opening assembly, 50. vertical movement assembly.

[0018] The accompanying drawings are used to provide a further understanding of the present invention and form a part of the description. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicating the orientation or position relationship are based on the orientation or position relationship 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 orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present invention.

[0021] Such as Figure 1 、 Figure 2 、 Figure 3 、 Figure 4As shown in the figure, the present invention provides a monitoring device for an oil-immersed transformer 1, which includes an oil-immersed transformer 1 and an oil conservator 2. The oil conservator 2 is fixed on the side wall of the oil-immersed transformer 1 through a support frame 3. An installation pipe 4 is provided at the lower part of the oil conservator 2. A gas relay 5 is provided at the lower end of the installation pipe 4. The gas relay 5 is connected to the oil-immersed transformer 1 through an oil pipe 6. A hydraulic oil leakage alarm component 7 is provided in the oil conservator 2; The gas relay 5 includes an outer housing 8. A light gas automatic release component 9, a guiding baffle 10 and a heavy gas power-off protection component 11 are provided in the outer housing 8. The heavy gas power-off protection component 11 is arranged on the light gas automatic release component 9 and the guiding baffle 10. An air release component 12 is provided on the upper wall of the outer housing 8; The light gas automatic release component 9 includes a gas collecting plate 13, a hollow floating ball 15, a push rod 17, a hinge frame 18 and a magnetic attraction opening component 49. The gas collecting plate 13 is arranged on the inner side wall of the outer housing 8. The gas collecting plate 13 inclines downward. The magnetic attraction opening component 49 is arranged on the gas collecting plate 13. The hinge frames 18 are symmetrically arranged on both sides of the lower end of the gas collecting plate 13. The push rod 17 is rotatably arranged on the hinge frames 18 through a shaft. The hollow floating ball 15 is arranged at the upper end of the push rod 17. The hollow floating ball 15 is made of magnetic material; The heavy gas power-off protection component 11 includes a vertical movement component 50 and a control cylinder 29. The vertical movement component 50 is slidably arranged on a pressure rod 22 and the guiding baffle 10. The control cylinder 29 is arranged on the lower wall of the guiding baffle 10. Oil leakage electric contact pieces 45 are symmetrically arranged at the lower part of the inner wall of the control cylinder 29. Heavy gas electric contact pieces 46 are symmetrically arranged at the upper part of the inner wall of the control cylinder 29.

[0022] As Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 shown, the magnetic attraction opening component 49 includes a sealing stop rod 14 and a rotating shaft 16. A through groove 19 is provided on the upper wall of the gas collecting plate 13. Rotating grooves 20 are symmetrically arranged on both sides of the through groove 19 at the lower end of the gas collecting plate 13. The rotating shaft 16 penetrates through the lower end of the gas collecting plate 13. The rotating shaft 16 penetrates through the through groove 19 and the rotating grooves 20. The sealing stop rod 14 is rotatably arranged in the through groove 19. One end of the sealing stop rod 14 is rotatably arranged on the rotating shaft 16 through a torsion spring. A magnetic attraction layer 21 is provided on the lower wall of the sealing stop rod 14.

[0023] As Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6As shown, the vertical movement component 50 includes a pressure rod 22, a sliding shaft 23, a limiting plate 24, a guiding vertical rod 25, a blocking shaft 26, a conductive ball 27, and a control spring 28. Symmetrically arranged at one end of the pressure rod 22 are rotating brackets 30 which are rotatably arranged on a rotating shaft 16 between rotating grooves 20. A sliding groove 31 is penetratingly provided on the side wall of the pressure rod 22. The sliding shaft 23 is slidably arranged in the sliding groove 31. The limiting plate 24 is arranged at one end of the sliding shaft 23. The guiding vertical rod 25 is penetratingly and slidably arranged on the guiding blocking wall 10. The upper end of the guiding vertical rod 25 is arranged at the other end of the sliding shaft 23. The blocking shaft 26 is arranged on the outer wall of the guiding vertical rod 25. The lower end of the guiding vertical rod 25 is inside a control cylinder 29. The conductive ball 27 is arranged at the lower end of the guiding vertical rod 25. The conductive ball 27 is inside the control cylinder 29. The lower end of the control spring 28 is arranged on the inner bottom wall of the control cylinder 29. The upper end of the control spring 28 is connected to the conductive ball 27.

[0024] As Figure 2 , Figure 7 shown, the hydraulic oil leakage alarm component 7 includes a floating ball 32, a suspension rope 33, a supporting sliding rod 34, a retaining ring 35, a cross bar 36, and a weight ball 37. The cross bar 36 is arranged on the inner wall of the installation pipe 4. The supporting sliding rod 34 is penetratingly arranged on the cross bar 36. The weight ball 37 is arranged at the lower end of the supporting sliding rod 34. The weight ball 37 is on the lower side of the cross bar 36. The lower end of the suspension rope 33 is arranged at the upper end of the supporting sliding rod 34. The floating ball 32 is arranged at the upper end of the suspension rope 33. The retaining ring 35 is arranged at the upper end of the supporting sliding rod 34. The weight ball 37 is vertically aligned with the pressure rod 22.

[0025] As Figure 2 , Figure 3 , Figure 4 , Figure 8 , Figure 9 shown, the air release component 12 includes an opening shaft 38, an opening spring 39, a spring baffle 40, a guiding frame 41, a linkage shaft 42, and an air blocking plate 43. The opening shaft 38 is penetratingly arranged on the upper wall of the outer housing 8. The spring baffle 40 is arranged at the upper end of the opening shaft 38. The opening spring 39 is sleeved on the opening shaft 38. The two ends of the opening spring 39 are respectively arranged at the lower end of the spring baffle 40 and the upper wall of the outer housing 8. A gas release groove 44 is downwardly extended on the outer wall at the upper end of the opening shaft 38. The guiding frames 41 are symmetrically arranged on the upper wall of the sealing blocking rod 14. The lower end of the opening shaft 38 is arranged between the two guiding frames 41. The linkage shaft 42 is penetratingly arranged at the lower end of the opening shaft 38. The linkage shaft 42 is slidably arranged in the guiding frame 41. The air blocking plate 43 is arranged on the inner top wall of the outer housing 8. In the initial state, the lower end of the gas release groove 44 is inside the outer housing 8, and the gas release groove 44 cannot connect the inside and outside of the outer housing 8.

[0026] As Figure 4As shown, the side of the through groove 19 close to the inner wall of the outer shell 8 is arc-shaped, the upper end of the sealing baffle rod 14 is arc-shaped, and the upper end of the sealing baffle rod 14 matches the arc-shaped end of the through groove 19 .

[0027] like Figure 3 As shown, a communication hole 47 is formed through the side wall of the outer shell 8 .

[0028] like Figure 3 As shown, a balancing air hole 48 is provided inside the guide baffle wall 10 , the inner end of the balancing air hole 48 is connected to the control cylinder 29 , and the outer end of the balancing air hole 48 is connected to the connecting hole 47 .

[0029] like Figure 2 , Figure 3 As shown, the lower wall of the guide retaining wall 10 is inclined.

[0030] When in use, the oil-immersed transformer 1 and the oil pillow 2 are filled with hydraulic oil. In the initial state, the upper floating ball 32 pulls the suspension rope 33 upward under the action of buoyancy, and the suspension rope 33 pulls the supporting slide rod 34 upward, and the drop ball 37 is stuck on the lower side of the cross bar 36. The hollow floating ball 15 is attached to the lower side wall of the sealing stop rod 14 under the action of buoyancy; When the oil-immersed transformer 1 operates normally, the gas normally decomposed by the hydraulic oil enters the outer shell 8 through the oil pipe 6, and the gas floats along the lower side of the guide baffle wall 10 to the gas collecting plate 13. When the gas gathers to a certain amount, the gas presses down the oil level at the gas collecting plate 13. After the oil level drops, the hollow float 15 drops with the oil level. The hollow float 15 is adsorbed by the magnetic layer 21 of the sealing baffle rod 14, and the hollow float 15 drives the sealing baffle rod 14 to rotate downward. When the upper end of the sealing baffle rod 14 is staggered with the upper end of the through groove 19, the gas on the lower side of the gas collecting plate 13 floats upward from between the sealing baffle rod 14 and the through groove 19 and enters The air baffle plate 43, the outer shell 8 and the air collecting plate 13 are connected, and the sealing baffle rod 14 drives the opening shaft 38 to move downward at this time, and the air release groove 44 connects the inside and outside of the outer shell 8, and the gas between the air baffle plate 43, the outer shell 8 and the air collecting plate 13 is discharged from the air release groove 44. After the gas on the lower side of the air collecting plate 13 is released, the oil level on the lower side of the air collecting plate 13 rises, and the hollow float 15 drives and pushes the sealing baffle rod 14 to rotate upward, and the sealing baffle rod 14 returns to the through groove 19. In the above process, since the angle between the sealing baffle rod 14 and the through groove 19 is very small, the force of the torsion spring will not separate the hollow float 15 from the sealing baffle rod 14; When a short - circuit fault occurs inside the oil - immersed transformer 1, the high - temperature electric arc at the fault point causes a large amount of gas in the hydraulic oil. The gas enters the lower side of the gas - collecting plate 13 along the guiding baffle 10. When the gas accumulates to a certain amount, the gas presses down the oil surface at the gas - collecting plate 13. After the oil surface drops, the hollow floating ball 15 follows the oil surface and drops. The hollow floating ball 15 is adsorbed by the magnetic adsorption layer 21 of the sealing stop rod 14, and the hollow floating ball 15 drives the sealing stop rod 14 to rotate downward. Due to the large accumulation of gas, the gap between the upper end of the sealing stop rod 14 and the upper end of the through - slot 19 cannot export the gas in time, so the oil surface on the lower side of the gas - collecting plate 13 continues to drop. When the magnetic attraction force between the magnetic adsorption layer 21 and the hollow floating ball 15 is less than the acting force of the torsion spring, the hollow floating ball 15 separates from the sealing stop rod 14. Under the action of the torsion spring, the sealing stop rod 14 returns to the through - slot 19, and the hollow floating ball 15 drives the push rod 17 to continue rotating. After the push rod 17 contacts the stop shaft 26, it pushes the stop shaft 26 upward. The stop shaft 26 drives the guiding vertical rod 25 to move upward, and the guiding vertical rod 25 drives the conductive ball 27 to move upward. At this time, the conductive ball 27 moves upward to the heavy - gas electric contact piece 46. At this time, the two heavy - gas electric contact pieces 46 are connected, and the two heavy - gas electric contact pieces 46 are electrically connected to an external signal device. The signal device sends a signal to the controller, and the controller opens the circuit of the oil - immersed transformer 1; When the oil - immersed transformer 1 leaks oil, the oil surface in the oil conservator 2 drops, and the floating ball 32 floats downward following the oil surface. The support slide rod 34 and the weight ball 37 move downward under the action of gravity. When the weight ball 37 drops to the pressure rod 22, the weight ball 37 drives the pressure rod 22 to move downward. The pressure rod 22 drives the sliding shaft 23 and the guiding vertical rod 25 to move downward. The guiding vertical rod 25 drives the conductive ball 27 to press down the control spring 28. When the conductive ball 27 drops to the oil - leakage electric contact piece 45, the two oil - leakage electric contact pieces 45 are electrically connected to an external signal device. The signal device sends a signal to the controller, and the controller controls an external alarm device to issue an alarm warning to notify the maintenance personnel for maintenance.

[0031] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not explicitly listed, or elements inherent to such process, method, article or device.

[0032] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention.

[0033] The above describes the present invention and its embodiments. Such description is not restrictive. What is shown in the drawings is only one of the embodiments of the present invention, and the actual structure is not limited thereto. Generally speaking, if those of ordinary skill in the art are inspired by it and, without departing from the gist of the present invention, design similar structural modes and embodiments to this technical solution without creative efforts, they shall fall within the protection scope of the present invention.

Claims

1. A monitoring device for an oil-immersed transformer, comprising an oil-immersed transformer (1) and an oil pillow (2), wherein the oil pillow (2) is fixed to a side wall of the oil-immersed transformer (1) via a support frame (3), and characterized in that: A mounting tube (4) is provided at the lower part of the oil pillow (2), a gas relay (5) is provided at the lower end of the mounting tube (4), the gas relay (5) is connected to the oil-immersed transformer (1) via an oil pipe (6), and a hydraulic oil leakage alarm component (7) is provided in the oil pillow (2); The gas relay (5) comprises an outer shell (8), wherein a light gas automatic release component (9), a guide baffle wall (10) and a heavy gas power-off protection component (11) are arranged inside the outer shell (8); the heavy gas power-off protection component (11) is arranged on the light gas automatic release component (9) and the guide baffle wall (10), and a gas release component (12) is arranged on the upper wall of the outer shell (8); The light gas automatic release component (9) comprises a gas collecting plate (13), a hollow floating ball (15), a push rod (17), a hinged frame (18) and a magnetic opening component (49), wherein the gas collecting plate (13) is arranged on the inner side wall of the outer shell (8), the gas collecting plate (13) is inclined downward, the magnetic opening component (49) is arranged on the gas collecting plate (13), the hinged frame (18) is symmetrically arranged on both sides of the lower end of the gas collecting plate (13), the push rod (17) is rotatably arranged on the hinged frame (18) through an axis, the hollow floating ball (15) is arranged on the upper end of the push rod (17), and the hollow floating ball (15) is made of magnetic material; The heavy gas power-off protection component (11) comprises a vertical moving component (50) and a control cylinder (29), wherein the vertical moving component (50) is slidably arranged on a pressure rod (22) and a guide baffle wall (10), and the control cylinder (29) is arranged on a lower wall of the guide baffle wall (10), and an oil leakage electrical connector (45) is symmetrically arranged on a lower portion of an inner wall of the control cylinder (29), and a heavy gas electrical connector (46) is symmetrically arranged on an upper portion of an inner wall of the control cylinder (29).

2. The monitoring device for an oil-immersed transformer according to claim 1, characterized in that: The magnetic opening component (49) comprises a sealing baffle rod (14) and a rotating shaft (16); the upper wall of the gas collecting plate (13) is provided with a through groove (19); the through groove (19) at the lower end of the gas collecting plate (13) is symmetrically provided with rotating grooves (20) on both sides; the rotating shaft (16) is provided through the lower end of the gas collecting plate (13); the rotating shaft (16) passes through the through groove (19) and the rotating groove (20); the sealing baffle rod (14) is rotatably provided in the through groove (19); one end of the sealing baffle rod (14) is rotatably provided on the rotating shaft (16) through a torsion spring; and the lower wall of the sealing baffle rod (14) is provided with a magnetic attraction layer (21).

3. The monitoring device for an oil-immersed transformer according to claim 2, characterized in that: The vertical moving assembly (50) comprises a pressure rod (22), a sliding shaft (23), a limiting plate (24), a guide vertical rod (25), a blocking shaft (26), a conductive ball (27) and a control spring (28); a rotating frame (30) is symmetrically arranged at one end of the pressure rod (22); the rotating frame (30) is rotatably arranged on a rotating shaft (16) between the rotating grooves (20); a sliding groove (31) is penetrated through a side wall of the pressure rod (22); the sliding shaft (23) is slidably arranged in the sliding groove (31); the limiting plate (24) is arranged at one end of the sliding shaft (23); The guide vertical rod (25) is slidably disposed on the guide retaining wall (10), the upper end of the guide vertical rod (25) is disposed on the other end of the sliding shaft (23), the retaining shaft (26) is disposed on the outer wall of the guide vertical rod (25), the lower end of the guide vertical rod (25) is located in a control cylinder (29), the conductive ball (27) is disposed at the lower end of the guide vertical rod (25), the conductive ball (27) is located in the control cylinder (29), the lower end of the control spring (28) is disposed on the inner bottom wall of the control cylinder (29), and the upper end of the control spring (28) is connected to the conductive ball (27).

4. The monitoring device for an oil-immersed transformer according to claim 3, characterized in that: The hydraulic oil leakage alarm assembly (7) comprises an upper floating ball (32), a suspension rope (33), a support slide bar (34), a retaining ring (35), a cross bar (36) and a drop ball (37), wherein the cross bar (36) is arranged on the inner wall of the mounting tube (4), the support slide bar (34) is penetrated and arranged on the cross bar (36), the drop ball (37) is arranged at the lower end of the support slide bar (34), the drop ball (37) is arranged on the lower side of the cross bar (36), the lower end of the suspension rope (33) is arranged at the upper end of the support slide bar (34), the upper floating ball (32) is arranged at the upper end of the suspension rope (33), the retaining ring (35) is arranged at the upper end of the support slide bar (34), and the drop ball (37) is aligned with the pressure rod (22) in the upper and lower directions.

5. The monitoring device for an oil-immersed transformer according to claim 4, characterized in that: The air release assembly (12) comprises an opening shaft (38), an opening spring (39), a spring baffle (40), a guide frame (41), a linkage shaft (42) and an air baffle (43); the opening shaft (38) is arranged through the upper wall of the outer shell (8); the spring baffle (40) is arranged at the upper end of the opening shaft (38); the opening spring (39) is sleeved on the opening shaft (38); and the two ends of the opening spring (39) are respectively arranged at the lower end of the spring baffle (40). and the upper wall of the outer shell (8), the upper end of the outer wall of the opening shaft (38) extends downward to be provided with a venting groove (44), the guide frame (41) is symmetrically arranged on the upper wall of the sealing baffle rod (14), the lower end of the opening shaft (38) is arranged between the two guide frames (41), the linkage shaft (42) passes through the lower end of the opening shaft (38), the linkage shaft (42) is slidably arranged in the guide frame (41), and the air baffle plate (43) is arranged on the inner top wall of the outer shell (8).

6. The monitoring device for an oil-immersed transformer according to claim 5, characterized in that: The side of the through groove (19) close to the inner wall of the outer shell (8) is in an arc shape, the upper end of the sealing stop rod (14) is in an arc shape, and the upper end of the sealing stop rod (14) cooperates with the arc-shaped end of the through groove (19).

7. The monitoring device for an oil-immersed transformer according to claim 6, characterized in that: A communication hole (47) is provided through the side wall of the outer shell (8).

8. The monitoring device for an oil-immersed transformer according to claim 7, characterized in that: A balancing air hole (48) is provided inside the guide retaining wall (10), the inner end of the balancing air hole (48) is connected to the control cylinder (29), and the outer end of the balancing air hole (48) is connected to the communication hole (47).

9. The monitoring device for an oil-immersed transformer according to claim 8, characterized in that: The lower wall of the guide retaining wall (10) is arranged in an inclined manner.

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