Gas pressure relief device and gas insulated switchgear containing the same

Abstract

The present invention relates to the technical field of gas-insulated switchgear, specifically a gas pressure relief device and a gas-insulated switchgear containing the device, which mainly includes a support frame, a current transformer 1 and a circuit breaker are installed on the top surface of the support frame, a current transformer 2 is installed at one end of the circuit breaker, and an isolating switch is installed at one end of the current transformer 2. The device also includes: a pressure relief mechanism, the pressure relief mechanism is arranged on one side of the circuit breaker, and a sealing mechanism, the sealing mechanism is arranged on one side of the circuit breaker. The internal pressure can be detected by the pressure gauge provided. When the pressure is too high, the electric push rod starts, and the electric push rod and the motor start, driving the piston block to move out of the pressure relief hole. At the same time, the electric push rod drives the movable plate fixed tube and the piston plate to move, and the piston plate moves to the other side of the pressure relief hole. The gas is discharged through the pressure relief hole and the pressure relief pipe, so that the gas inside the equipment is released, and the equipment will not be damaged due to excessive gas pressure, thereby improving the safety and life of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of gas-insulated switchgear, in particular to a gas pressure relief device and a gas-insulated switchgear comprising the same. Background Art

[0002] Gas-insulated switchgear (GIS) was born out of the power industry's urgent need for high reliability, compactness, and environmental adaptability. Traditional air-insulated switchgear (AIS) requires increased phase-to-phase distances at high voltage levels, resulting in bulky equipment and vulnerability to environmental factors such as moisture, salt spray, and high altitude. GIS, on the other hand, seals core components such as circuit breakers, disconnectors, and busbars within a grounded metal casing and insulates them with SF6, N2, or a mixed gas. This fully enclosed structure eliminates the risk of fire and electric shock, and offers an internal arc withstand capability of 31.5kA / 1s, ensuring the safety of both personnel and equipment.

[0003] During the actual operation of gas-insulated switchgear, when the internal circuit breaker performs a circuit-breaking operation, a strong arc will be generated between its live parts due to the sudden interruption of current. The generation of this arc is not only accompanied by high temperature, but also causes the gas pressure inside the equipment to rise rapidly. The high-temperature and high-pressure gas will break through the equipment casing due to excessive pressure, thereby causing irreversible damage to the equipment itself and its internal components. More seriously, if this situation is not effectively controlled, it may also cause an explosion accident, directly threatening the personal safety of on-site operators. Summary of the Invention

[0004] The object of the present invention is to provide a gas pressure relief device and a gas insulated switchgear including the same, so as to solve the problem in the background art that the gas may break through the device casing due to excessive pressure.

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

[0006] A gas pressure relief device comprises: a support frame, a current transformer 1 and a circuit breaker mounted on the top surface of the support frame, a current transformer 2 mounted on one end of the circuit breaker, an isolating switch mounted on one end of the current transformer 2, an inlet and outlet bushing mounted on one end of the isolating switch, and further comprising:

[0007] The pressure relief mechanism is arranged on one side of the circuit breaker. The pressure relief mechanism includes a fixed shell located on one side of the circuit breaker. A fixed tube is slidably installed on the side of the fixed shell. A movable plate is fixedly installed on the outer wall of the fixed tube. A piston plate is fixedly installed on one end of the fixed tube. A pressure relief hole is opened through the outer wall of the fixed shell. The pressure relief mechanism is used to relieve pressure on the circuit breaker.

[0008] The sealing mechanism is arranged on one side of the circuit breaker. The sealing mechanism includes a piston block slidably mounted on the inner wall of the pressure relief hole. A rotating sleeve is arranged inside the fixed shell. The sealing mechanism is used to seal the pressure relief hole.

[0009] Preferably, an operating box is installed on the upper end of the circuit breaker, and one end of the current transformer is connected to one end of the circuit breaker.

[0010] Preferably, a flange plate is fixedly mounted on one end of the circuit breaker, the side of the flange plate is fixedly connected to one end of the fixed shell, a through hole is formed on the side of the flange plate, a retaining ring is fixedly mounted on the inner wall of the through hole, and the side of the piston plate abuts against the side of the retaining ring.

[0011] Preferably, the outer wall of the piston plate is slidably connected to the inner wall of the fixed shell, the outer wall of the movable plate is slidably connected to the inner wall of the fixed shell, three limit blocks are fixedly installed on the outer wall of the movable plate, three limit grooves are opened on the inner wall of the fixed shell, and the outer walls of the three limit blocks are slidably connected to the inner walls of the three limit grooves respectively.

[0012] Preferably, an electric push rod is fixedly installed on the side of the fixed shell, one end of the electric push rod slides through the side of the fixed shell and is fixedly connected to the side of the movable plate, a pressure gauge is fixedly installed on the side of the flange plate, three pressure relief holes are provided, and three pressure relief pipes are fixedly installed on the outer wall of the fixed shell, and the three pressure relief pipes are respectively connected to the three pressure relief holes.

[0013] Preferably, a motor is fixedly installed at one end of the fixed tube, a rotating shaft is fixedly installed at the output end of the motor, the other end of the rotating shaft rotates through the side of the fixed tube and extends to the inside of the fixed tube, a rotating block is fixedly installed at one end of the fixed tube, and the outer wall of the rotating block is rotatably connected to the inner wall of the fixed tube.

[0014] Preferably, three connecting blocks are fixedly installed on the outer wall of the rotating block, three through grooves are opened through the outer wall of the fixed tube, the side surfaces of the three connecting blocks are slidingly connected to the inner walls of the three through grooves respectively, and the side surfaces of the three connecting blocks are fixedly connected to the inner wall of the rotating sleeve.

[0015] Preferably, three fixing bars are fixedly installed on both sides of the rotating sleeve, and two fixing sleeves are fixedly installed on the other end of the multiple fixing bars. The inner walls of the two fixing sleeves are rotatably connected to the inner wall of the fixed tube through the bearing seats. Three arc-shaped grooves are opened through the side of the rotating sleeve, and connecting grooves are opened through the inner walls of the three arc-shaped grooves.

[0016] Preferably, three T-shaped slots are provided on the side of the movable plate, and T-shaped blocks are slidably installed on the inner walls of the three T-shaped slots, and adjusting rods are fixedly installed on one end of each of the three T-shaped blocks. The outer walls of the three adjusting rods are slidably connected to the inner walls of the three arc slots, and fixed rods are fixedly installed on the outer walls of the three adjusting rods. Three piston blocks are provided, and the other ends of the three fixing rods are fixedly connected to the sides of the three piston blocks, and round blocks are fixedly installed on one end of the three adjusting rods.

[0017] A gas-insulated switchgear comprises a gas pressure relief device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention can detect the internal pressure through the pressure gauge provided. When the pressure is too high, the electric push rod is started, and the electric push rod and the motor are started to drive the piston block to move out of the pressure relief hole. At the same time, the electric push rod drives the movable plate fixed tube and the piston plate to move, and the piston plate moves to the other side of the pressure relief hole. The gas is discharged through the pressure relief hole and the pressure relief pipe, so that the gas inside the equipment is released, and the equipment will not be damaged due to excessive gas pressure, thereby improving the safety and service life of the equipment.

[0020] The motor is set to drive the rotating shaft and the rotating block to rotate a certain angle, and drive the connecting block and the rotating sleeve to rotate a certain angle. The rotating sleeve drives the adjusting rod and the fixed rod to move through the arc groove and the connecting groove. The fixed rod drives the piston block to move. The piston block moves to the pressure relief hole to seal the pressure relief hole. By cooperating with the piston plate, the equipment is doubly sealed to ensure that the gas in the equipment is not prone to leakage, thereby improving the sealing and safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0022] Figure 2 It is a schematic cross-sectional view of the overall three-dimensional structure of the present invention;

[0023] Figure 3 This is a schematic diagram of the three-dimensional structure of the fixing portion of the present invention;

[0024] Figure 4 For the present invention Figure 2 Enlarged view of point A in the middle;

[0025] Figure 5 It is a schematic cross-sectional view of the three-dimensional structure of the fixed shell of the present invention;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the movable plate of the present invention;

[0027] Figure 7 This is an exploded view of the three-dimensional structure of the rotating sleeve of the present invention;

[0028] Figure 8 It is a schematic cross-sectional view of the three-dimensional structure of the fixing sleeve of the present invention.

[0029] In the picture:

[0030] 1. Support frame; 101. Current transformer 1; 102. Circuit breaker; 103. Operation box; 104. Current transformer 2; 105. Disconnector; 106. Inlet and outlet bushings;

[0031] 2. Pressure relief mechanism; 201. Flange plate; 202. Pressure gauge; 203. Fixed housing; 204. Electric push rod; 205. Moving plate; 206. Limit block; 207. Limit groove; 208. Fixed pipe; 209. Piston plate; 210. Retaining ring; 211. Pressure relief pipe; 212. Pressure relief hole;

[0032] 3. Sealing mechanism; 301. Motor; 302. Rotating shaft; 303. Rotating block; 304. Connecting block; 305. Through slot; 306. Rotating sleeve; 307. Fixing bar; 308. Fixing sleeve; 309. Arc slot; 310. Connecting slot; 311. T-slot; 312. T-block; 313. Adjusting rod; 314. Round block; 315. Fixing rod; 316. Piston block. DETAILED DESCRIPTION

[0033] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0034] In order to enable those skilled in the art to better understand the present invention, the following will clearly and completely describe the technical solutions in the embodiments of the present invention 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, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0035] like Figures 1-8 As shown, the present application provides a gas pressure relief device, comprising: a support frame 1, a current transformer 101 and a circuit breaker 102 are mounted on the top surface of the support frame 1, a current transformer 2 104 is mounted on one end of the circuit breaker 102, an isolating switch 105 is mounted on one end of the current transformer 2 104, and an inlet and outlet bushing 106 is mounted on one end of the isolating switch 105, and further comprising:

[0036] The pressure relief mechanism 2 is provided on one side of the circuit breaker 102 and includes a fixed housing 203 located on one side of the circuit breaker 102. A fixed tube 208 is slidably mounted on the side of the fixed housing 203. A movable plate 205 is fixedly mounted on the outer wall of the fixed tube 208. A piston plate 209 is fixedly mounted on one end of the fixed tube 208. A pressure relief hole 212 is formed through the outer wall of the fixed housing 203. The pressure relief mechanism 2 is used to relieve pressure on the circuit breaker 102.

[0037] Specifically, such as Figures 1-8 As shown, an operation box 103 is installed on the upper end of the circuit breaker 102, and one end of the current transformer 101 is connected to one end of the circuit breaker 102.

[0038] In this embodiment, an operation box 103 is provided to control the device.

[0039] Specifically, such as Figures 1-8 As shown, a flange plate 201 is fixedly installed at one end of the circuit breaker 102, and the side of the flange plate 201 is fixedly connected to one end of the fixed shell 203. A through hole is opened through the side of the flange plate 201, and a retaining ring 210 is fixedly installed on the inner wall of the through hole. The side of the piston plate 209 abuts against the side of the retaining ring 210.

[0040] In this embodiment, the through hole is sealed and blocked by the provided piston plate 209 .

[0041] Specifically, such as Figures 1-8 As shown, the outer wall of the piston plate 209 is slidably connected to the inner wall of the fixed shell 203, the outer wall of the movable plate 205 is slidably connected to the inner wall of the fixed shell 203, three limit blocks 206 are fixedly installed on the outer wall of the movable plate 205, and three limit grooves 207 are opened on the inner wall of the fixed shell 203. The outer walls of the three limit blocks 206 are slidably connected to the inner walls of the three limit grooves 207 respectively.

[0042] In this embodiment, the limiting groove 207 is provided to limit the limiting block 206, and further limit the movable plate 205, so that the movable plate 205 moves more stably.

[0043] Specifically, such as Figures 1-8 As shown, an electric push rod 204 is fixedly installed on the side of the fixed shell 203, one end of the electric push rod 204 slides through the side of the fixed shell 203 and is fixedly connected to the side of the movable plate 205, a pressure gauge 202 is fixedly installed on the side of the flange plate 201, three pressure relief holes 212 are provided, and three pressure relief pipes 211 are fixedly installed on the outer wall of the fixed shell 203, and the three pressure relief pipes 211 are respectively connected to the three pressure relief holes 212.

[0044] In this embodiment, the pressure of the gas inside the device is released through the provided pressure relief hole 212 and the pressure relief pipe 211 .

[0045] The sealing mechanism 3 is arranged on one side of the circuit breaker 102 . The sealing mechanism 3 includes a piston block 316 slidably mounted on the inner wall of the pressure relief hole 212 . A rotating sleeve 306 is arranged inside the fixed shell 203 . The sealing mechanism 3 is used to seal the pressure relief hole 212 .

[0046] Specifically, such as Figures 1-8As shown, a motor 301 is fixedly installed at one end of the fixed tube 208, a rotating shaft 302 is fixedly installed at the output end of the motor 301, and the other end of the rotating shaft 302 rotates through the side of the fixed tube 208 and extends to the inside of the fixed tube 208. A rotating block 303 is fixedly installed at one end of the fixed tube 208, and the outer wall of the rotating block 303 is rotatably connected to the inner wall of the fixed tube 208.

[0047] In this embodiment, the motor 301 is provided to drive the rotating shaft 302 to rotate, and the rotating shaft 302 drives the rotating block 303 to rotate a certain angle.

[0048] Specifically, such as Figures 1-8 As shown, three connecting blocks 304 are fixedly installed on the outer wall of the rotating block 303, and three through grooves 305 are opened through the outer wall of the fixed tube 208. The sides of the three connecting blocks 304 are respectively slidably connected to the inner walls of the three through grooves 305, and the sides of the three connecting blocks 304 are fixedly connected to the inner wall of the rotating sleeve 306.

[0049] In this embodiment, the rotating block 303 is provided to drive the connecting block 304 and the rotating sleeve 306 to rotate by a certain angle.

[0050] Specifically, such as Figures 1-8 As shown, three fixing bars 307 are fixedly installed on both sides of the rotating sleeve 306, and two fixing sleeves 308 are fixedly installed on the other end of the multiple fixing bars 307. The inner walls of the two fixing sleeves 308 are rotatably connected to the inner wall of the fixed tube 208 through the bearing seats. Three arc-shaped grooves 309 are opened through the side of the rotating sleeve 306, and the inner walls of the three arc-shaped grooves 309 are respectively opened with connecting grooves 310.

[0051] In this embodiment, the rotating sleeve 306 is limited by the provided fixing sleeve 308 and fixing bar 307 , so that the rotating sleeve 306 can rotate more stably.

[0052] Specifically, such as Figures 1-8 As shown, three T-shaped slots 311 are provided on the side of the movable plate 205, and T-shaped blocks 312 are slidably installed on the inner walls of the three T-shaped slots 311 respectively. Adjustment rods 313 are fixedly installed on one end of each of the three T-shaped blocks 312. The outer walls of the three adjustment rods 313 are slidably connected to the inner walls of the three arc-shaped slots 309 respectively. Fixed rods 315 are fixedly installed on the outer walls of the three adjustment rods 313 respectively. Three piston blocks 316 are provided, and the other ends of the three fixed rods 315 are fixedly connected to the sides of the three piston blocks 316 respectively. A round block 314 is fixedly installed on one end of the three adjustment rods 313.

[0053] In this embodiment, the pressure relief hole 212 is sealed by the provided piston block 316 .

[0054] A gas-insulated switchgear comprises a gas pressure relief device.

[0055] The specific solution is as follows: when the gas pressure inside the equipment is too high, the pressure gauge 202 is tested, the motor 301 drives the rotating shaft 302 and the rotating block 303 to rotate a certain angle, the rotating block 303 drives the connecting block 304 and the rotating sleeve 306 to rotate a certain angle, the rotating sleeve 306 drives the adjusting rod 313 and the fixed rod 315 to move through the arc groove 309 and the connecting groove 310, the fixed rod 315 drives the piston block 316 to move out of the pressure relief hole 212, and then the electric push rod 204 drives the moving plate 205 to move, the moving plate 205 drives the fixed tube 208 and the piston block 316 to move, the piston block 316 moves to the other side of the pressure relief hole 212, and the gas inside the equipment The air is discharged from the pressure relief pipe 211 through the pressure relief hole 212. When the air pressure inside the equipment is normal, the electric push rod 204 pushes the movable plate 205 and the fixed pipe 208 to move. The fixed pipe 208 drives the piston plate 209 to abut against the retaining ring 210 to seal the through hole. At the same time, the motor 301 drives the rotating shaft 302 to reverse, driving the rotating block 303 to rotate. The rotating block 303 drives the connecting block 304 and the rotating sleeve 306 to rotate a certain angle. The rotating sleeve 306 drives the adjusting rod 313 and the fixed rod 315 to move through the arc groove 309 and the connecting groove 310. The fixed rod 315 drives the piston block 316 to move to the inner wall of the pressure relief hole 212 to seal the pressure relief hole 212, thereby improving the safety of the equipment.

[0056] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative; within the scope of the present invention, the technical features of the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0057] The present invention is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A gas pressure relief device, comprising: A support frame (1), wherein a current transformer 1 (101) and a circuit breaker (102) are mounted on the top surface of the support frame (1), a current transformer 2 (104) is mounted on one end of the circuit breaker (102), an isolating switch (105) is mounted on one end of the current transformer 2 (104), and an inlet and outlet bushing (106) is mounted on one end of the isolating switch (105), characterized in that it further comprises: A pressure relief mechanism (2), the pressure relief mechanism (2) being arranged on one side of the circuit breaker (102), the pressure relief mechanism (2) comprising a fixed shell (203) located on one side of the circuit breaker (102), a fixed tube (208) being slidably installed through the side of the fixed shell (203), a movable plate (205) being fixedly installed on the outer wall of the fixed tube (208), a piston plate (209) being fixedly installed on one end of the fixed tube (208), a pressure relief hole (212) being opened through the outer wall of the fixed shell (203), and the pressure relief mechanism (2) being used to relieve pressure on the circuit breaker (102); A sealing mechanism (3) is provided on one side of the circuit breaker (102), the sealing mechanism (3) comprising a piston block (316) slidably mounted on the inner wall of the pressure relief hole (212), a rotating sleeve (306) is provided inside the fixed shell (203), a motor (301) is fixedly mounted on one end of the fixed tube (208), a rotating shaft (302) is fixedly mounted on the output end of the motor (301), and the other end of the rotating shaft (302) rotates and penetrates the fixed tube (208) 08) side extends to the interior of the fixed tube (208), one end of the fixed tube (208) is fixedly installed with a rotating block (303), the outer wall of the rotating block (303) is rotatably connected to the inner wall of the fixed tube (208), the outer wall of the rotating block (303) is fixedly installed with three connecting blocks (304), the outer wall of the fixed tube (208) is provided with three through grooves (305), the sides of the three connecting blocks (304) are respectively slidably connected to the inner walls of the three through grooves (305), and the three The side of the connecting block (304) is fixedly connected to the inner wall of the rotating sleeve (306), and three fixing bars (307) are fixedly installed on both sides of the rotating sleeve (306). Two fixing sleeves (308) are fixedly installed on the other ends of the fixing bars (307). The inner walls of the two fixing sleeves (308) are rotatably connected to the inner wall of the fixed tube (208) through the bearing seat. Three arc grooves (309) are opened through the side of the rotating sleeve (306). The three arc grooves (309) The inner wall is provided with connecting grooves (310) respectively, and the side of the movable plate (205) is provided with three T-shaped grooves (311). The inner walls of the three T-shaped grooves (311) are respectively slidably mounted with T-shaped blocks (312). One end of the three T-shaped blocks (312) is respectively fixedly mounted with an adjusting rod (313). The outer walls of the three adjusting rods (313) are respectively slidably connected to the inner walls of the three arc-shaped grooves (309). The sealing mechanism (3) is used to seal the pressure relief hole (212).

2. A gas pressure relief device according to claim 1, characterized in that: An operating box (103) is installed on the upper end of the circuit breaker (102), and one end of the current transformer (101) is connected to one end of the circuit breaker (102).

3. A gas pressure relief device according to claim 1, characterized in that: A flange plate (201) is fixedly mounted on one end of the circuit breaker (102), and a side surface of the flange plate (201) is fixedly connected to one end of the fixed shell (203). A through hole is formed through the side surface of the flange plate (201), and a retaining ring (210) is fixedly mounted on the inner wall of the through hole. The side surface of the piston plate (209) abuts against the side surface of the retaining ring (210).

4. A gas pressure relief device according to claim 3, characterized in that: The outer wall of the piston plate (209) is slidably connected to the inner wall of the fixed shell (203), the outer wall of the movable plate (205) is slidably connected to the inner wall of the fixed shell (203), three limiting blocks (206) are fixedly installed on the outer wall of the movable plate (205), and three limiting grooves (207) are opened on the inner wall of the fixed shell (203), and the outer walls of the three limiting blocks (206) are slidably connected to the inner walls of the three limiting grooves (207) respectively.

5. A gas pressure relief device according to claim 4, characterized in that: An electric push rod (204) is fixedly mounted on the side of the fixed shell (203), one end of the electric push rod (204) slides through the side of the fixed shell (203) and is fixedly connected to the side of the movable plate (205), a pressure gauge (202) is fixedly mounted on the side of the flange plate (201), three pressure relief holes (212) are provided, and three pressure relief pipes (211) are fixedly mounted on the outer wall of the fixed shell (203), and the three pressure relief pipes (211) are respectively connected to the three pressure relief holes (212).

6. A gas pressure relief device according to claim 1, characterized in that: The outer walls of the three adjusting rods (313) are respectively fixedly mounted with fixing rods (315), three piston blocks (316) are provided, the other ends of the three fixing rods (315) are respectively fixedly connected to the sides of the three piston blocks (316), and one end of the three adjusting rods (313) is fixedly mounted with a round block (314).

7. A gas insulated switchgear, comprising the gas pressure relief device according to any one of claims 1 to 6.

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