An emergency protection device for oil-immersed transformer

Abstract

The application belongs to the technical field of substation protection, and discloses an emergency protection device for oil-immersed transformers, which comprises a gas relay body, an adjusting type air extraction and oil supplement mechanism and a rotation type oil-proof air permeation mechanism. The adjusting type air extraction and oil supplement mechanism is installed at the rear end of the gas relay body. The adjusting type air extraction and oil supplement mechanism comprises an air inlet assembly, an oil storage tank, an oil outlet assembly, a synchronous driving assembly, a first extraction assembly and a second extraction assembly. The rotation type oil-proof air permeation mechanism is installed at the upper end of the oil storage tank. In this way, the device can realize accurate air extraction in the gas relay body and accurate oil filling operation of the transformer oil.

Description

Technical Field

[0001] This invention relates to the field of substation protection technology, specifically to an emergency protection device for an oil-immersed transformer. Background Technology

[0002] A gas relay is a protective device for transformers, installed on the connecting pipe between the oil conservator and the oil tank. When a fault occurs inside the transformer, the arc generated by the short-circuit current causes the transformer oil and insulating materials to decompose, producing a large amount of flammable gas, collectively known as gas. Under light gas conditions, when a minor fault occurs in the transformer, the gas produced by oil decomposition rises into the gas relay, causing an increase in internal gas pressure and a drop in oil level. The open cup inside the relay then falls, closing the light gas reed contact and issuing an alarm signal to remind personnel to release the gas in time. After the gas relay releases the gas, some oil is consumed during the decomposition of the oil into gas, so it is necessary to replenish the oil in the relay.

[0003] CN118017437B discloses an emergency protection circuit device and its protection method for substation testing, including a housing. Inside the housing is a light gas detection component for detecting oil shortage or light gas. The light gas detection component includes a first sensing component, a second sensing component, an open cup, a counterweight, and a second horizontal axis. Inside the housing is a heavy gas detection component for detecting heavy gas. The housing is equipped with a suction and oil replenishment component for activating venting and refueling when the second sensing component is triggered and the first sensing component is not triggered, and for stopping venting and refueling when the first sensing component is triggered and the second sensing component is not triggered. However, this device still has the following problems during use: The piston stroke of the gas extraction and oil replenishment structure is a fixed value, which cannot flexibly adjust the exhaust flow and oil replenishment volume according to the amount of gas accumulated in the gas relay and the drop in oil level. When there is a lot of gas, the exhaust and oil replenishment efficiency is low, while when there is a little gas, excessive oil replenishment is likely to occur, affecting the accurate reset of the relay.

[0004] Based on this, the present invention designs an emergency protection device for an oil-immersed transformer to solve the above problems. Summary of the Invention

[0005] In view of the above-mentioned shortcomings of the existing technology, the present invention provides an emergency protection device for oil-immersed transformers.

[0006] To achieve the above objectives, the present invention provides the following technical solution: An emergency protection device for an oil-immersed transformer includes a gas relay body, an adjustable air extraction and oil replenishment mechanism, and an alternating oil-proof and ventilated mechanism. An adjustable air extraction and oil replenishment mechanism for synchronously venting and replenishing oil to the gas relay body is installed at the rear end of the gas relay body. The adjustable air-suction and oil-replenishing mechanism includes an air intake component, an oil storage tank, an oil outlet component, a synchronous drive component, a first pull-out component, and a second pull-out component; the air intake component, the oil outlet component, and the synchronous drive component are all installed at the rear end of the adjustable air-suction and oil-replenishing mechanism; the first pull-out component and the second pull-out component are respectively connected to the air intake component and the oil outlet component; and the synchronous drive component is connected to the first pull-out component and the second pull-out component. The oil storage tank is fixedly installed at the rear end of the adjustable air extraction and oil replenishment mechanism and connected to the air intake assembly and the oil outlet assembly; A rotating oil-proof and breathable mechanism for filtering and releasing gas inside the oil storage tank is installed at the top of the oil storage tank. Furthermore, the rotating oil-proof and breathable mechanism includes a mounting cover, a retraction assembly, and an oil-proof and breathable membrane; the mounting cover is fixedly installed at the upper end of the oil storage tank; a rotating slide groove is provided in the middle of the mounting cover; The receiving and releasing assembly is installed at the top of the oil storage tank; both ends of the oil-proof and breathable membrane are connected to the receiving and releasing assembly; the oil-proof and breathable membrane is slidably connected to the inner wall of the rotating chute. Furthermore, the intake assembly includes an intake solenoid valve, a first pipe, a first check valve, a first transition sealing cylinder, a second check valve, and a second pipe; the intake solenoid valve and the first transition sealing cylinder are both fixedly installed on the upper rear end of the gas relay body; the first check valve is fixedly installed on the upper end of the first transition sealing cylinder and communicates with the inside of the first transition sealing cylinder; one end of the first pipe is fixedly connected to the intake solenoid valve; the other end of the first pipe is fixedly connected to the first check valve. The second check valve is fixedly installed at the left end of the first transition sealing cylinder; one end of the second pipeline is fixedly connected to the second check valve; the other end of the second pipeline is fixedly connected to the oil storage tank and communicates with the inside of the oil storage tank. Furthermore, the oil outlet assembly includes a third pipe, a third check valve, a second transition sealing cylinder, a fourth check valve, a fourth pipe, and an oil inlet solenoid valve; the second transition sealing cylinder and the oil inlet solenoid valve are fixedly installed on the lower rear end of the gas relay body; the third check valve is fixedly installed on the upper end of the second transition sealing cylinder; one end of the third pipe is fixedly connected to the lower outlet of the oil storage tank; the other end of the third pipe is fixedly connected to the third check valve. The fourth check valve is fixedly installed at the left end of the second transition sealing cylinder and communicates with the inside of the second transition sealing cylinder; One end of the fourth pipe is fixedly connected to the oil inlet solenoid valve; the other end of the fourth pipe is fixedly connected to the fourth check valve. Furthermore, the synchronous drive assembly includes a U-shaped mounting bracket, a synchronous transmission assembly, a rotating disk, and a control motor; the U-shaped mounting bracket is fixedly installed at the rear end of the gas relay body; the synchronous transmission assembly is installed on the inner wall of the U-shaped mounting bracket. The control motor is fixedly mounted on the U-shaped mounting bracket; the rotating disk is symmetrically mounted on the upper and lower sides of the rear end of the U-shaped mounting bracket. Furthermore, the synchronous transmission assembly is connected to the upper rotating disk, the output end of the control motor, and the lower rotating disk; The rotating discs on the upper and lower sides are respectively connected to the first pull-out assembly and the second pull-out assembly; Furthermore, both the first and second pull-out assemblies include a crank, a drive block, a sealing slide rod, a push rod, a piston disc, an adjusting screw, and an adjusting motor; one end of the crank of the first and second pull-out assemblies is hinged to the rotating disk, and the other end of the crank is hinged to the drive block. The sealing slide is fixedly connected to the right end of the drive block; the adjusting screw is rotatably connected to the right end of the drive block; the adjusting motor is fixedly installed on the left end of the drive block; the output end of the adjusting motor is fixedly connected to the adjusting screw. The push rod is threadedly connected to the adjusting screw; the push rod is slidably connected to the sealing slide rod; the piston disc is fixedly installed on the right end of the push rod. The sealing slide rod and adjusting screw of the first and second pull-out components are respectively slidably connected to the inner walls of the first and second transition sealing cylinders. The piston discs of the first and second pull-out assemblies are respectively in a sealing sliding connection with the inner walls of the first and second transition sealing cylinders. Furthermore, the receiving and discharging assembly includes a vertical plate, a drive motor, and a receiving roller; the vertical plate is symmetrically fixedly installed on the front and rear sides of the upper end of the oil storage tank; the receiving roller is rotatably connected to the vertical plate; the drive motor is fixedly installed on the left end of the vertical plate; the output end of the drive motor is fixedly connected to the receiving roller. Furthermore, an oil-proof and breathable membrane is wrapped around the outer end of the rear receiving roller, and one end of the oil-proof and breathable membrane is fixedly connected to the rear receiving roller; one end of the oil-proof and breathable membrane is fixedly connected to the front receiving roller.

[0007] Compared with the prior art, the beneficial effects of this invention are as follows: 1. When an oil-immersed transformer fails, the transformer oil and insulating materials decompose to produce gas. The gas accumulates at the top inner part of the gas relay body. After the transformer oil inside the gas relay body is consumed, the oil level drops. At this time, the open cup inside the gas relay body sinks, triggering the light gas protection action inside the gas relay body. At this time, the controller will first change the length of the first pull-out component and the second pull-out component, thereby changing the movement stroke of the first pull-out component and the second pull-out component, thereby increasing the flow rate of gas entering the oil storage tank inside the gas relay body and the oil storage. The oil in the tank enters the gas relay body at a certain discharge rate; subsequently, the controller controls the first and second pull-out components to move back and forth through the synchronous drive component; when the first pull-out component moves back and forth, it first draws the gas inside the gas relay body into the air intake component, and then presses the gas in the air intake component into the oil storage tank, and the gas is discharged after being filtered through the oil-proof and breathable membrane; at the same time, the second pull-out component moves back and forth, first drawing the transformer oil stored in the oil storage tank into the oil outlet component, and then presses the transformer oil in the oil outlet component into the gas relay body, thereby realizing rapid venting and oil replenishment of the gas relay body.

[0008] 2. When the light gas reed sensor inside the gas relay body returns to the untriggered state, and the open cup is not fully reset, the controller will control the first and second pull-out components to return to their initial lengths, reducing the flow rate of gas entering the oil storage tank from the gas relay body and the amount of oil entering the gas relay body from the oil storage tank. This allows the device to accurately vent gas from the gas relay body and accurately add transformer oil. When the open cup is fully reset, the controller will stop the synchronous drive component, thereby stopping the venting and oil replenishment operation of the gas relay body.

[0009] 3. After the device performs an exhaust and oil replenishment operation, the take-up and release components will control the oil-proof breathable membrane to move along the rotating slide, ensuring that the part of the oil-proof breathable membrane that has not been in contact with the gas moves to the middle of the mounting cover and aligns with the vent hole. This ensures that when the device performs exhaust and oil replenishment operations in the future, the oil-proof breathable membrane can still have qualified filtration performance, allowing the gas to be discharged smoothly. This ensures that the device reduces the environmental impact when the gas relay body exhausts gas, and increases the safety of the device. Attached Figure Description

[0010] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are merely some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0011] Figure 1 This invention provides a three-dimensional emergency protection device for an oil-immersed transformer. Figure 1 .

[0012] Figure 2 This is a front view of an emergency protection device for an oil-immersed transformer according to the present invention.

[0013] Figure 3 This is a left view of an emergency protection device for an oil-immersed transformer according to the present invention.

[0014] Figure 4 This invention provides a three-dimensional emergency protection device for an oil-immersed transformer. Figure 2 .

[0015] Figure 5 A partial 3D view of the adjustable air extraction and oil replenishment mechanism and the alternating oil-proof and breathable mechanism.

[0016] Figure 6 For along Figure 3 A three-dimensional image with a portion removed along the AA direction.

[0017] Figure 7 for Figure 6 Enlarged view of point B in the middle.

[0018] The labels in the diagram represent: 1. Gas relay body; 2. Adjustable air extraction and oil replenishment mechanism; 21. Inlet solenoid valve; 22. First pipeline; 23. First check valve; 24. First transition sealing cylinder; 25. Second check valve; 26. Second pipeline; 27. Oil storage tank; 271. Vent; 272. Oil filling hole; 28. Third pipeline; 29. ​​Third check valve; 210. Second transition sealing cylinder; 211. Fourth check valve; 212. Fourth pipeline; 21 3. Oil inlet solenoid valve; 214. U-shaped mounting bracket; 215. Synchronous transmission assembly; 216. Rotating disc; 217. Crank; 218. Drive block; 219. Sealing slide rod; 220. Push rod; 221. Piston disc; 222. Adjusting screw; 223. Adjusting motor; 224. Control motor; 3. Alternating oil-proof and breathable mechanism; 31. Mounting cover; 32. Alternating slide groove; 33. Vertical plate; 34. Drive motor; 35. Collection roller; 36. Oil-proof and breathable membrane. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. The terms "left," "right," "front," "rear," "up," and "down" mentioned in the following description are oriented according to the perspective of a front view.

[0020] Example 1: Please refer to the accompanying drawings in the instruction manual. Figures 1-7 An emergency protection device for an oil-immersed transformer includes a gas relay body 1, an adjustable air extraction and oil replenishment mechanism 2, and an alternating oil-proof and ventilated mechanism 3. The left end of the gas relay body 1 is fixedly equipped with an inlet pipe that connects to the oil tank of the oil-immersed transformer; the right end of the gas relay body 1 is fixedly equipped with an outlet pipe that connects to the oil conservator of the oil-immersed transformer. An adjustable air extraction and oil replenishment mechanism 2 for synchronously venting and replenishing oil to the gas relay body 1 is installed at the rear end of the gas relay body 1. The adjustable air-suction and oil-replenishing mechanism 2 includes an air intake component, an oil storage tank 27, an oil outlet component, a synchronous drive component, a first pull-out component, and a second pull-out component; the air intake component, the oil outlet component, and the synchronous drive component are all installed at the rear end of the adjustable air-suction and oil-replenishing mechanism 2; the first pull-out component and the second pull-out component are respectively connected to the air intake component and the oil outlet component; and the synchronous drive component is connected to the first pull-out component and the second pull-out component. The oil storage tank 27 is fixedly installed at the rear end of the adjustable air extraction and oil replenishment mechanism 2 and connected to the air inlet assembly and the oil outlet assembly; A vent 271 is provided at the middle of the upper end of the oil storage tank 27; an oil filling hole 272 is provided on the right side of the upper end of the oil storage tank 27; a sealing cover that can be flipped open is rotatably installed at the outer end of the oil filling hole 272 (not shown in the figure). A rotating oil-proof and breathable mechanism 3 for filtering and releasing gas inside the oil storage tank 27 is installed at the upper end of the oil storage tank 27. The rotating oil-proof and breathable mechanism 3 includes a mounting cover 31, a retraction assembly, and an oil-proof and breathable membrane 36; the mounting cover 31 is fixedly installed on the upper end of the oil storage tank 27; a rotating slide groove 32 is provided in the middle of the mounting cover 31; The receiving and releasing assembly is installed at the upper end of the oil storage tank 27; the two ends of the oil-proof and breathable membrane 36 are connected to the receiving and releasing assembly; the oil-proof and breathable membrane 36 is slidably connected to the inner wall of the rotating chute 32. A controller (not shown in the diagram) is fixedly installed on the outer end of the gas relay body 1; the controller is electrically connected to the light gas reed sensor and the heavy gas reed sensor inside the gas relay body 1. Furthermore, the controller is connected to the synchronous drive component; In this invention, when an oil-immersed transformer fails, the transformer oil and insulating material decompose to produce gas. The gas accumulates at the top of the gas relay body 1. After the transformer oil in the gas relay body 1 is consumed, the oil level drops. At this time, the open cup in the gas relay body 1 sinks, triggering the light gas protection action in the gas relay body 1. At this time, the controller will first change the length of the first pull-out component and the second pull-out component, thereby changing the movement stroke of the first pull-out component and the second pull-out component, and thus increasing the flow rate of gas entering the oil storage tank 27 from the gas relay body 1 and the discharge volume of oil in the oil storage tank 27 into the gas relay body 1. Subsequently, the controller will control the first and second pull-out components to move back and forth left and right through the synchronous drive component; When the first pull-out component moves back and forth, it first draws the gas inside the gas relay body 1 into the air intake component, and then presses the gas in the air intake component into the oil storage tank 27. The gas will then be filtered through the oil-proof and breathable membrane 36 and discharged. At the same time, the reciprocating movement of the second pull-out component will first draw the transformer oil stored in the oil storage tank 27 into the oil outlet component, and then press the transformer oil in the oil outlet component into the gas relay body 1, thereby realizing the rapid venting and oil replenishment of the gas relay body 1. Until the light gas reed sensor inside the gas relay body 1 returns to the untriggered state and the open cup is not fully reset, the controller will control the first and second pull-out components to return to their initial lengths, reducing the flow rate of gas from the gas relay body 1 into the oil storage tank 27 and the discharge volume of oil from the oil storage tank 27 into the gas relay body 1. This allows the device to accurately vent gas from the gas relay body 1 and accurately add transformer oil. When the open cup is fully reset, the controller will stop the synchronous drive component, thereby stopping the venting and oil replenishment operation of the gas relay body 1. After the device performs an exhaust and oil replenishment operation, the retraction assembly controls the oil-proof and breathable membrane 36 to move along the rotating slide 32, ensuring that the part of the oil-proof and breathable membrane 36 that is not in contact with the gas moves to the middle of the mounting cover 31 and aligns with the vent 271. This ensures that when the device performs subsequent exhaust and oil replenishment operations, the oil-proof and breathable membrane 36 can still have qualified filtration performance, allowing the gas to be discharged smoothly. This ensures that the device reduces the environmental impact of the gas relay body 1 during exhaust and increases the safety of the device.

[0021] Example 2: Figures 1-7As shown, in a preferred embodiment of the present invention, the intake assembly includes an intake solenoid valve 21, a first pipe 22, a first check valve 23, a first transition sealing cylinder 24, a second check valve 25, and a second pipe 26; the intake solenoid valve 21 and the first transition sealing cylinder 24 are both fixedly installed on the upper rear end of the gas relay body 1; the first check valve 23 is fixedly installed on the upper end of the first transition sealing cylinder 24 and communicates with the inside of the first transition sealing cylinder 24; one end of the first pipe 22 is fixedly connected to the intake solenoid valve 21; the other end of the first pipe 22 is fixedly connected to the first check valve 23. The second check valve 25 is fixedly installed at the left end of the first transition sealing cylinder 24; one end of the second pipe 26 is fixedly connected to the second check valve 25; the other end of the second pipe 26 is fixedly connected to the oil storage tank 27 and communicates with the inside of the oil storage tank 27. The oil outlet assembly includes a third pipe 28, a third check valve 29, a second transition sealing cylinder 210, a fourth check valve 211, a fourth pipe 212, and an oil inlet solenoid valve 213; the second transition sealing cylinder 210 and the oil inlet solenoid valve 213 are fixedly installed on the lower rear end of the gas relay body 1; the third check valve 29 is fixedly installed on the upper end of the second transition sealing cylinder 210; one end of the third pipe 28 is fixedly connected to the lower outlet of the oil storage tank 27; the other end of the third pipe 28 is fixedly connected to the third check valve 29. The fourth one-way valve 211 is fixedly installed at the left end of the second transition sealing cylinder 210 and communicates with the inside of the second transition sealing cylinder 210; One end of the fourth pipe 212 is fixedly connected to the oil inlet solenoid valve 213; the other end of the fourth pipe 212 is fixedly connected to the fourth check valve 211. The synchronous drive assembly includes a U-shaped mounting bracket 214, a synchronous transmission assembly 215, a rotating disk 216, and a control motor 224; the U-shaped mounting bracket 214 is fixedly installed at the rear end of the gas relay body 1; the synchronous transmission assembly 215 is installed on the inner wall of the U-shaped mounting bracket 214. The control motor 224 is fixedly mounted on the U-shaped mounting bracket 214; the rotating disk 216 is symmetrically mounted on the upper and lower rear ends of the U-shaped mounting bracket 214. Synchronous transmission assembly 215 adopts a synchronous belt and synchronous pulley transmission assembly; The upper synchronous pulley of the synchronous transmission assembly 215 is fixedly connected to the upper rotating disk 216; the lower synchronous pulley of the synchronous transmission assembly 215 is fixedly connected to the output end of the control motor 224 and the lower rotating disk 216. The rotating disks 216 on the upper and lower sides are respectively connected to the first pull-out assembly and the second pull-out assembly; Both the first and second pull-out assemblies include a crank 217, a drive block 218, a sealing slide rod 219, a push rod 220, a piston disc 221, an adjusting screw 222, and an adjusting motor 223; one end of the crank 217 of the first and second pull-out assemblies is hinged to the rotating disc 216, and the other end of the crank 217 is hinged to the drive block 218. The sealing slide bar 219 is fixedly connected to the right end of the drive block 218; the adjusting screw 222 is rotatably connected to the right end of the drive block 218; the adjusting motor 223 is fixedly installed on the left end of the drive block 218; the output end of the adjusting motor 223 is fixedly connected to the adjusting screw 222. The push rod 220 is threadedly connected to the adjusting screw 222; the push rod 220 is slidably connected to the sealing slide rod 219; the piston disc 221 is fixedly installed on the right end of the push rod 220. The sealing slide rod 219 and adjusting screw 222 of the first and second pull-out components are respectively sealed and slidably connected to the inner walls of the first transition sealing cylinder 24 and the second transition sealing cylinder 210. The piston discs 221 of the first and second pull-out assemblies are respectively slidably connected to the inner walls of the first transition sealing cylinder 24 and the second transition sealing cylinder 210. The controller is electrically connected to the adjustment motor 223 of the first and second pull-out components; In this invention, when an oil-immersed transformer fails, the transformer oil and insulating material decompose to produce gas. The gas accumulates at the top of the gas relay body 1. After the transformer oil in the gas relay body 1 is consumed, the oil level drops. At this time, the open cup in the gas relay body 1 sinks, triggering the light gas protection action in the gas relay body 1. At this time, the controller will start the adjustment motor 223 of the first pull-out assembly and the second pull-out assembly. The adjustment motor 223 controls the adjustment screw 222 to rotate, so that the push rod 220 moves to the right along the sealing slide 219, thereby expanding the movement stroke of the piston disc 221 in the first transition sealing cylinder 24 and the second transition sealing cylinder 210, thereby increasing the flow rate of gas in the gas relay body 1 into the oil storage tank 27 and the discharge volume of oil in the oil storage tank 27 into the gas relay body 1. Subsequently, the controller starts the control motor 224, which drives the upper and lower rotating disks 216 to rotate through the synchronous transmission assembly 215. The rotation of the rotating disks 216 will pull the drive block 218, sealing slide rod 219 and adjusting screw 222 of the first and second pull-out assemblies through the crank 217 to move back and forth along the first transition sealing cylinder 24 and the second transition sealing cylinder 210. When the piston disc 221 of the first pull-out assembly reciprocates, the air intake solenoid valve 21 opens, drawing the gas in the gas relay body 1 through the first pipe 22 and the first one-way valve 23 into the first transition sealing cylinder 24, and then through the piston disc 221 along the first transition sealing cylinder 24 and the second pipe 26 into the oil storage tank 27. After being filtered by the oil-proof and breathable membrane 36, it is discharged, realizing automatic exhaust operation. The first check valve 23 allows oil or gas or liquid to be drawn into the first transition sealing cylinder 24 only through the first pipeline 22, and the second check valve 25 allows oil or gas or liquid to enter the oil storage tank 27 only through the first transition sealing cylinder 24. At the same time, the oil inlet solenoid valve 213 is opened, and the piston disc 221 of the second pull-out assembly moves back and forth, which will draw the oil in the oil storage tank 27 through the third pipe 28 and the third check valve 29 to the second transition sealing cylinder 210, and then through the piston disc 221 to the fourth check valve 211, the fourth pipe 212 and the oil inlet solenoid valve 213, and finally into the gas relay body 1 to realize automatic oil replenishment operation; The third check valve 29 ensures that the oil can only be drawn into the second transition sealing cylinder 210 through the oil storage tank 27, and the fourth check valve 211 ensures that the oil can only enter the fourth pipeline 212 through the second transition sealing cylinder 210. Until the light gas reed sensor inside the gas relay body 1 returns to the untriggered state and the open cup is not fully reset, the controller will control the adjusting motor 223 of the first and second pull-out components to drive the adjusting screw 222 to rotate, so that the push rod 220 returns to the initial position, reducing the flow rate of gas from the gas relay body 1 into the oil storage tank 27 and the discharge volume of oil from the oil storage tank 27 into the gas relay body 1, thereby enabling the device to achieve precise venting of gas from the gas relay body 1 and precise filling of transformer oil. When the open cup is fully reset, the controller will stop controlling the motor 224, thereby stopping the venting and oil replenishment operation of the gas relay body 1. Furthermore, after some of the oil flows into the first transition sealing cylinder 24 through the first pipe 22, it can also be squeezed into the oil storage tank 27 by the piston disc 221 of the first pull assembly for recycling, without causing oil waste or increasing safety risks.

[0022] Example 3: Figure 5 and Figure 6 As shown, in a preferred embodiment of the present invention, the receiving and discharging assembly includes a vertical plate 33, a drive motor 34, and a receiving roller 35; the vertical plate 33 is symmetrically fixedly installed on the front and rear sides of the upper end of the oil storage tank 27; the receiving roller 35 is rotatably connected to the vertical plate 33; the drive motor 34 is fixedly installed on the left end of the vertical plate 33; the output end of the drive motor 34 is fixedly connected to the receiving roller 35. An oil-proof and breathable membrane 36 is wrapped around the outer end of the rear receiving roller 35, and one end of the oil-proof and breathable membrane 36 is fixedly connected to the rear receiving roller 35; one end of the oil-proof and breathable membrane 36 is fixedly connected to the front receiving roller 35. In this invention, after the device performs an exhaust and oil replenishment operation, the rear drive motor 34 controls the rear take-up roller 35 to rotate, thereby unwinding the oil-proof and breathable membrane 36. Meanwhile, the front drive motor 34 controls the front take-up roller 35 to rotate, thereby winding the oil-proof and breathable membrane 36. This allows the oil-proof and breathable membrane 36 to move along the rotating slide 32, ensuring that the parts of the oil-proof and breathable membrane 36 that are not in contact with gas move to the center of the mounting cover 31 and align with the vent hole 271. This ensures that when the device performs subsequent exhaust and oil replenishment operations, the oil-proof and breathable membrane 36 still has qualified filtration performance, allowing the gas to be discharged smoothly. This reduces the environmental impact of the gas relay body 1 during exhaust and increases the safety of the device.

[0023] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit it. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An emergency protection device for an oil-immersed transformer, comprising a gas relay body (1), characterized in that: It also includes an adjustable air extraction and oil replenishment mechanism (2) and an alternating oil-proof and breathable mechanism (3); An adjustable air extraction and oil replenishment mechanism (2) for synchronously venting and replenishing oil to the gas relay body (1) is installed at the rear end of the gas relay body (1). The adjustable air-suction and oil-replenishing mechanism (2) includes an air intake component, an oil storage tank (27), an oil outlet component, a synchronous drive component, a first pull-out component, and a second pull-out component; the air intake component, the oil outlet component, and the synchronous drive component are all installed at the rear end of the adjustable air-suction and oil-replenishing mechanism (2); the first pull-out component and the second pull-out component are respectively connected to the air intake component and the oil outlet component; and the synchronous drive component is connected to the first pull-out component and the second pull-out component. The oil storage tank (27) is fixedly installed at the rear end of the adjustable air extraction and oil replenishment mechanism (2) and connected to the air intake assembly and the oil outlet assembly; An alternating oil-proof venting mechanism (3) for filtering and releasing gas inside the oil storage tank (27) is installed at the upper end of the oil storage tank (27).

2. The emergency protection device for an oil-immersed transformer according to claim 1, characterized in that, The rotating oil-proof and breathable mechanism (3) includes a mounting cover (31), a retraction assembly and an oil-proof and breathable membrane (36); the mounting cover (31) is fixedly installed on the upper end of the oil storage tank (27); a rotating slide groove (32) is provided in the middle of the mounting cover (31). The receiving and releasing assembly is installed at the upper end of the oil storage tank (27); the two ends of the oil-proof and breathable membrane (36) are connected to the receiving and releasing assembly; the oil-proof and breathable membrane (36) is slidably connected to the inner wall of the rotating chute (32).

3. The emergency protection device for an oil-immersed transformer according to claim 2, characterized in that, The intake assembly includes an intake solenoid valve (21), a first pipe (22), a first check valve (23), a first transition sealing cylinder (24), a second check valve (25), and a second pipe (26); the intake solenoid valve (21) and the first transition sealing cylinder (24) are both fixedly installed on the upper rear end of the gas relay body (1); the first check valve (23) is fixedly installed on the upper end of the first transition sealing cylinder (24) and communicates with the inside of the first transition sealing cylinder (24); one end of the first pipe (22) is fixedly connected to the intake solenoid valve (21); the other end of the first pipe (22) is fixedly connected to the first check valve (23); The second check valve (25) is fixedly installed on the left end of the first transition sealing cylinder (24); one end of the second pipe (26) is fixedly connected to the second check valve (25); the other end of the second pipe (26) is fixedly connected to the oil storage tank (27) and communicates with the inside of the oil storage tank (27).

4. The emergency protection device for an oil-immersed transformer according to claim 3, characterized in that, The oil outlet assembly includes a third pipe (28), a third check valve (29), a second transition sealing cylinder (210), a fourth check valve (211), a fourth pipe (212), and an oil inlet solenoid valve (213); the second transition sealing cylinder (210) and the oil inlet solenoid valve (213) are fixedly installed on the lower rear end of the gas relay body (1); the third check valve (29) is fixedly installed on the upper end of the second transition sealing cylinder (210); one end of the third pipe (28) is fixedly connected to the lower outlet of the oil storage tank (27); the other end of the third pipe (28) is fixedly connected to the third check valve (29); The fourth check valve (211) is fixedly installed at the left end of the second transition sealing cylinder (210) and communicates with the inside of the second transition sealing cylinder (210); One end of the fourth pipe (212) is fixedly connected to the oil inlet solenoid valve (213); the other end of the fourth pipe (212) is fixedly connected to the fourth check valve (211).

5. The emergency protection device for an oil-immersed transformer according to claim 4, characterized in that, The synchronous drive assembly includes a U-shaped mounting bracket (214), a synchronous transmission assembly (215), a rotating disk (216), and a control motor (224); the U-shaped mounting bracket (214) is fixedly installed at the rear end of the gas relay body (1); the synchronous transmission assembly (215) is installed on the inner wall of the U-shaped mounting bracket (214); The control motor (224) is fixedly mounted on the U-shaped mounting bracket (214); the rotating disk (216) is symmetrically mounted on the upper and lower sides of the rear end of the U-shaped mounting bracket (214); Furthermore, the synchronous transmission assembly (215) is connected to the upper rotating disk (216), the output end of the control motor (224), and the lower rotating disk (216); The rotating disks (216) on the upper and lower sides are respectively connected to the first pull-out assembly and the second pull-out assembly.

6. The emergency protection device for an oil-immersed transformer according to claim 5, characterized in that, Both the first and second pull-out assemblies include a crank (217), a drive block (218), a sealing slide rod (219), a push rod (220), a piston disc (221), an adjusting screw (222), and an adjusting motor (223); one end of the crank (217) of the first and second pull-out assemblies is hinged to the rotating disk (216), and the other end of the crank (217) is hinged to the drive block (218); The sealing slide rod (219) is fixedly connected to the right end of the drive block (218); the adjusting screw (222) is rotatably connected to the right end of the drive block (218); the adjusting motor (223) is fixedly installed on the left end of the drive block (218); the output end of the adjusting motor (223) is fixedly connected to the adjusting screw (222); The push rod (220) is threadedly connected to the adjusting screw (222); the push rod (220) is slidably connected to the sealing slide rod (219); the piston disc (221) is fixedly installed on the right end of the push rod (220); The sealing slide rod (219) and adjusting screw (222) of the first pull-out assembly and the second pull-out assembly are respectively connected to the inner wall of the first transition sealing cylinder (24) and the second transition sealing cylinder (210) in a sealing sliding connection. The piston discs (221) of the first and second pull-out assemblies are respectively connected to the inner walls of the first transition sealing cylinder (24) and the second transition sealing cylinder (210) in a sealing sliding connection.

7. The emergency protection device for an oil-immersed transformer according to claim 6, characterized in that, The take-up and take-down assembly includes a vertical plate (33), a drive motor (34), and a take-up roller (35); the vertical plate (33) is symmetrically fixedly installed on the front and rear sides of the upper end of the oil storage tank (27); the take-up roller (35) is rotatably connected to the vertical plate (33); the drive motor (34) is fixedly installed on the left end of the vertical plate (33); the output end of the drive motor (34) is fixedly connected to the take-up roller (35).

8. The emergency protection device for an oil-immersed transformer according to claim 7, characterized in that, An oil-proof and breathable membrane (36) is wrapped around the outer end of the rear receiving roller (35), and one end of the oil-proof and breathable membrane (36) is fixedly connected to the rear receiving roller (35); one end of the oil-proof and breathable membrane (36) is fixedly connected to the front receiving roller (35).

9. The emergency protection device for an oil-immersed transformer according to claim 8, characterized in that, When an oil-immersed transformer malfunctions, the transformer oil and insulating materials decompose, producing gas. This gas accumulates at the top inner part of the gas relay body. As the transformer oil inside the gas relay body is consumed, the oil level drops. At this time, the open cup inside the gas relay body sinks, triggering the light gas protection action within the gas relay body. The controller first changes the length of the first and second pull-out components, thereby changing their travel distance and increasing the flow rate of gas entering the oil storage tank from the gas relay body and the discharge rate of oil from the oil storage tank into the gas relay body. Subsequently, the controller controls the first and second pull-out components to move back and forth via a synchronous drive component. When the first pull-out component moves back and forth, it first draws the gas inside the gas relay body into the air intake component, and then forces the gas in the air intake component into the oil storage tank. The gas is then discharged after being filtered through an oil-proof and breathable membrane. Simultaneously, the second pull-out component moves back and forth, first drawing the transformer oil stored in the oil storage tank into the oil outlet component, and then forces the transformer oil in the oil outlet component into the gas relay body. This allows for rapid venting and oil replenishment of the gas relay body. Until the light gas reed sensor inside the gas relay body returns to its untriggered state, and the open cup is not fully reset, the controller will control the first and second pull-out components to return to their initial lengths. This reduces the flow rate of gas entering the oil storage tank from the gas relay body and the amount of oil entering the gas relay body from the oil storage tank. This allows the device to accurately vent gas from the gas relay body and accurately add transformer oil. Once the open cup is fully reset, the controller will stop the synchronous drive component, thus stopping the venting and oil replenishment operation of the gas relay body. After each venting and oil replenishment operation, the retraction component will control the oil-proof vent membrane to move along the rotating slide, ensuring that the part of the oil-proof vent membrane that has not been in contact with gas moves to the center of the mounting cover and aligns with the vent hole. This ensures that the oil-proof vent membrane still has adequate filtration performance during subsequent venting and oil replenishment operations, allowing gas to be discharged smoothly. This reduces the environmental impact of the gas relay body during venting and increases the safety of the device.

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