Dustproof pressure relief device and method for electrical switch cabinet

Abstract

The invention discloses a dustproof pressure relief device and method for an electrical switch cabinet, and particularly relates to the technical field of pressure relief device.The dustproof pressure relief device comprises a baffle and a U-shaped rod, the top end of the inner wall of the baffle is fixedly connected with a first rotating shaft, and the two ends of the first rotating shaft are rotationally connected with the left side and the right side of the inner wall of the U-shaped rod correspondingly; one side of the U-shaped rod is fixedly connected with a cabinet body, the baffle is located on one side of the cabinet body, the side, close to the bottom end of the outer surface of the baffle, of the outer surface of the cabinet body is in threaded connection with two pressure relief bolts, and the edges of the left side and the right side of the bottom end of the outer surface of the baffle are located between one side of the outer surface of the cabinet body and the heads of the pressure relief bolts; when a fault occurs in the cabinet body and high-pressure gas is generated, a pressure relief bolt is popped out of the cabinet body, and meanwhile, the high-pressure gas pushes a baffle to enable the baffle to rotate on the left side and the right side of the inner wall of a U-shaped rod through a first rotating shaft to change the angle, so that high-pressure air in the cabinet body is released through the included angle between the baffle and the cabinet body for pressure relief.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure relief devices, and in particular to a dustproof pressure relief device and method for an electrical switch cabinet. Background Art

[0002] Switchgear is an electrical equipment, whose main function is to open and close, control and protect electrical equipment in the process of power generation, transmission, distribution and power conversion in the power system. During the operation of the switchgear, a short circuit fault may occur. Under the condition of excessive short-circuit current, high-temperature and high-pressure gas will be generated instantly. If the high-temperature and high-pressure gas cannot be effectively released in a very short time in the narrow cabinet, it will cause the switchgear to explode, damage the adjacent switchgear, and may also endanger personal safety. Therefore, when the switchgear is installed, a pressure relief device will be installed on the top side of the cabinet.

[0003] The pressure relief device of the switch cabinet is usually a plate set on the back of the switch cabinet. The top of the plate is connected to the switch cabinet through bolts, and the lower end of the plate is connected to the switch cabinet through loose bolts. When high-pressure gas is generated inside the cabinet, the plate will burst open to release the pressure. However, when the high-pressure gas leaks out, the parts inside the switch cabinet may be burst out and splashed, causing safety hazards. Summary of the invention

[0004] The present invention proposes a dustproof pressure relief device and method for an electrical switch cabinet to solve the problem that the pressure relief device of the switch cabinet is usually provided with a plate on the back of the switch cabinet, the top of the plate is connected to the switch cabinet by bolts, and the lower end of the plate is connected to the switch cabinet by loose bolts. When high-pressure gas is generated inside the cabinet, the plate is broken open to release the pressure. However, when the high-pressure gas is released, the parts inside the switch cabinet may be broken out and splashed, causing safety hazards.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a dustproof and pressure relief device for an electrical switch cabinet, comprising a baffle and a U-shaped rod, a first rotating shaft is fixedly connected to the top end of the inner wall of the baffle, two ends of the first rotating shaft are respectively rotatably connected to the left and right sides of the inner wall of the U-shaped rod, one side of the U-shaped rod is fixedly connected to a cabinet body, the baffle is located on one side of the cabinet body, and two pressure relief bolts are threadedly connected to one side of the outer surface of the cabinet body near the bottom end of the baffle, and the left and right edges of the bottom end of the outer surface of the baffle are located between one side of the outer surface of the cabinet body and the head of the pressure relief bolt.

[0006] The effect achieved by the above components is: when a fault occurs inside the cabinet and high-pressure gas is generated, the pressure relief bolt will burst out of the cabinet. At the same time, the high-pressure gas will push the baffle so that the baffle rotates on the left and right sides of the inner wall of the U-shaped rod through the first rotating shaft to change the angle, so that the high-pressure air inside the cabinet is released through the angle between the baffle and the cabinet to relieve the pressure.

[0007] Preferably, a protective device is provided on the outer surface of the baffle, and the protective device includes two positioning blocks, one side of the two positioning blocks is fixedly connected to the left and right sides of the outer surface of the cabinet respectively, one side of the two positioning blocks is rotatably connected to a threaded rod, and the end of the threaded rod away from the positioning block is fixedly connected to the second bevel gear, the left and right ends of the outer surface of the first rotating shaft are respectively fixedly connected to the first bevel gear, the outer surface of the first bevel gear is meshed with the outer surface of the second bevel gear, the diameter of the first bevel gear is larger than the diameter of the second bevel gear, and a first slide groove and a placement groove are provided on the side of the interior of the cabinet close to the baffle, and the outer surface of the cabinet The surface is provided with square grooves on the left and right sides, the inner wall of the first slide groove is slidably connected with a groove rod, the bottom end of the groove rod is provided with a woven net, the top and bottom ends of the woven net are respectively fixedly connected to the bottom end of the groove rod and the bottom end of the inner wall of the placement groove, a first long rope is wound around the outer surface of the second bevel gear, the first long rope passes through the inner wall of the square groove and the top end of the inner wall of the first slide groove, and one end of the first long rope away from the second bevel gear is fixedly connected to the top end of the groove rod, the outer surface of the cabinet is fixedly connected with groove blocks on the left and right sides respectively, the inner wall of the groove block is slidably connected with a first L-shaped rod, the top end of the first L-shaped rod is fixedly connected with a threaded ring, and the inner wall of the threaded ring is connected to the threaded ring The outer surface of the threaded rod is fixedly connected, the end of the first L-shaped rod away from the threaded ring is fixedly connected to the positioning rod, one side of the groove block is slidably connected to a slider, the top of the slider is fixedly connected to a gear rod, the bottom end of the slider is fixedly connected to a second L-shaped rod, the ends of the two first bevel gears away from the first rotating shaft are respectively fixedly connected to a flat gear, the outer surface of the flat gear is meshed with the outer surface of the gear rod, a rectangular groove is provided on one side of the outer surface of the baffle, the inner wall of the baffle is slidably connected to a sliding plate, one side of the sliding plate is fixedly connected to two protruding pieces, one side of the baffle is fixedly connected to a slot plate, the inner wall of the slot plate is rotatably connected to the second rotating shaft, the A plurality of fan blades are fixedly connected to the outer surface of the second rotating shaft, and a screw is fixedly connected to an end of the second rotating shaft away from the fan blades, and the outer surface of the screw is threadedly connected to a threaded barrel, and the outer surface of the threaded barrel is provided with two second long ropes, and the two second long ropes are respectively wound around the outer surface of the threaded barrel clockwise and counterclockwise, and one end of the two second long ropes away from the threaded barrel is respectively fixedly connected to the left and right ends of the outer surface of the first rotating shaft, a falling groove is provided at the bottom end of the inner wall of the groove plate, and semicircular grooves are respectively provided on the left and right sides of the inner wall of the falling groove, and a collection box is slidably inserted into the inner wall of the falling groove, and semicircular blocks are respectively fixedly connected to the left and right sides of the top of the collection box.

[0008] The effect achieved by the above components is as follows: by setting a protective device, after the baffle is installed on the surface of the cabinet, the top end of the collection box can be inserted into the inside of the drop groove so that the semicircular block is stuck in the inside of the semicircular groove so that the collection box is located below the groove plate. When a fault occurs inside the cabinet and high-pressure gas is generated, the pressure relief bolt will be blown out of the cabinet. At the same time, the high-pressure gas will push the baffle so that the baffle rotates on the left and right sides of the inner wall of the U-shaped rod through the first rotating shaft to change the angle so that the high-pressure air inside the cabinet is discharged through the angle between the baffle and the cabinet for pressure relief. When the baffle rotates, it will drive the two first bevel gears to rotate, and through the two first bevel gears, it will drive the second bevel gear, the threaded rod and the flat gear to rotate. When the second bevel gear rotates, the first long rope will be wrapped around the outer surface of the second bevel gear. When the first long rope is wrapped around the outer surface of the second bevel gear, it will pull the slot rod to slide upward on the inner wall of the first slide groove so that the slot rod is located at the top of the inner wall of the first slide groove and the woven net is pulled open so that the woven net is located in the vacant position after the baffle is opened, so as to avoid the parts inside the cabinet from being blown out by the high-pressure gas as much as possible. When the threaded rod rotates, the threaded ring will be on the outer surface of the threaded rod The movement drives the first L-shaped rod to slide on the inner wall of the groove block in the direction away from the groove block, so that the positioning rod moves a certain distance on one side of the baffle. When the baffle rotates to a certain angle, the outer surface will contact one side of the positioning rod. The baffle is blocked by the positioning rod for buffering to prevent the baffle from rotating too much and leaving the surface of the cabinet as much as possible. When the flat gear rotates, it will push the gear rod to make the slider slide on one side of the outer surface of the groove block, driving the third L-shaped rod to move. When the baffle rotates and the third L-shaped rod moves, one end of the third L-shaped rod will push the two protrusions on one side of the sliding plate to retract the sliding plate The rectangular groove inside the baffle is opened. Since the ends of the two second long ropes away from the second rotating shaft are respectively wound around the outer surface of the threaded barrel clockwise and counterclockwise, when the first rotating shaft rotates to wrap the two second long ropes around the surface, the threaded barrel will be pulled to rotate rapidly on the surface of the screw and detach from the surface of the screw, driving the screw and the second rotating shaft to rotate. The negative pressure suction force generated by the rotation of the second rotating shaft and the fan blades will suck the dust generated by the high-pressure gas bursting out from the cabinet into the interior of the slot plate. The dust sucked into the slot plate will enter the interior of the collection box through the drop groove for collection.

[0009] Preferably, the inner wall of the slot rod is slidably connected to two sliding rods, and the ends of the two sliding rods that are away from each other are fixedly connected with clamping blocks, and first springs are respectively provided on the left and right sides of the middle end of the inner wall of the slot rod, and the two ends of the two first springs are respectively fixedly connected to one side of the sliding rod and one side of the inner wall of the slot rod, and clamping grooves are respectively opened on the left and right sides of the top end of the inner wall of the first sliding slot.

[0010] The effect achieved by the above-mentioned components is: when the slot rod is pulled by the first long rope to slide on the inner wall of the first slide groove, the blocks at one end of the two sliding rods will press against the left and right sides of the inner wall of the first slide groove and compress the first spring inside the slot rod; when the slot rod is located at the top end of the inner wall of the first slide groove, the two first springs will return to their original state and push the two sliding rods to slide away from each other, and the blocks at one end of the two sliding rods will be inserted into the inside of the slot to further fix the position of the slot rod inside the first slide groove.

[0011] Preferably, two second sliding grooves are provided on one side of the slot rod, and blocks are fixedly connected to one side of the two sliding rods respectively, and the outer surfaces of the blocks slide on the inner walls of the second sliding grooves.

[0012] The effect achieved by the above components is: after the protective device is completed, you can push the outer surfaces of the two blocks by hand to make the blocks slide close to each other on the inner wall of the second slide groove, control the sliding rod to slide on the inner wall of the slot rod to make the card block detach from the inside of the card slot and retract the slot rod to the bottom end of the inner wall of the first slide groove.

[0013] Preferably, two third L-shaped rods are fixedly connected to one side of the outer surface of the U-shaped rod, and a section of the two second long ropes close to the first rotating shaft is located inside the third L-shaped rod.

[0014] The effect achieved by the above components is: by setting the third L-shaped rod, the two second long ropes can be fixed at a position close to the first rotating shaft to avoid the second long ropes being accidentally entangled in other places when the first rotating shaft rotates to pull the second long ropes.

[0015] Preferably, a guide ring is fixedly connected to one side of the baffle, and the cross-sectional shape of the guide ring is conical.

[0016] The effect achieved by the above components is: by setting the conical guide ring, the second shaft drives the fan blades to rotate to generate negative pressure suction to suck dust into the interior of the slot plate, and the dust can enter more concentratedly through the guide ring.

[0017] Preferably, two guide rods are fixedly connected to one side of the bottom end of the inner wall of the slot plate close to the drop slot, and the cross-section shape of the two guide rods is conical.

[0018] The effect achieved by the above components is that after the dust enters the interior of the slot plate, it passes through the two guide rods so that the dust can enter the interior of the collection box through the drop slot more easily and concentratedly for collection.

[0019] Preferably, a plurality of convex strips are fixedly connected to both sides of the outer surface of the collection box, and the convex strips are linearly distributed on the outer surface of the collection box.

[0020] The effect achieved by the above components is that the collection box can be more conveniently pulled out from the inside of the drop groove by pinching the convex strips on the outer surface of the collection box and pulling the collection box.

[0021] Preferably, a stabilizing device is provided at one end of the outer surface of the baffle, and the stabilizing device includes two rectangular rods, one end of the two rectangular rods are respectively fixedly connected to a third rotating shaft, and the ends of the two rectangular rods away from the third rotating shaft are respectively slidably connected to a sleeve rod, and the end of the sleeve rod away from the rectangular rod is rotatably connected to the outer surface of the cabinet, and the left and right sides of the outer surface of the rectangular rod are respectively fixedly connected to a fourth L-shaped rod, one end of the fourth L-shaped rod is fixedly connected to a cylindrical rod, and the outer surface of the cylindrical rod is slidably connected to a cylindrical block, and a second spring is provided inside the cylindrical block, and the two ends of the second spring are respectively fixedly connected to one end of the cylindrical rod and one side of the inner wall of the cylindrical block, and the left and right sides of the end of the sleeve rod away from the cabinet are fixedly connected to two protrusions, and slots are provided on the outer surfaces of the two protrusions, and two positioning grooves are provided at one end of the baffle, and the two ends of the outer surface of the third rotating shaft are rotatably connected to the inner wall of the positioning groove.

[0022] The effects achieved by the above components are as follows: when the internal pressure of the cabinet is released and the rotation angle of the baffle changes, the third rotating shaft will rotate on the inner wall of the positioning groove to change the angle between the rectangular rod and the baffle, and at the same time, the rectangular rod will slide on the inner wall of the sleeve rod to gradually increase the total length of the rectangular rod and the sleeve rod. During the sliding of the rectangular rod, one end of the two cylindrical blocks will slide against the left and right sides of the outer surface of the sleeve rod. When one end of the cylindrical block slides on the outer surface of the protrusion, it will compress the second spring inside the cylindrical block to make the cylindrical block slide on the outer surface of the cylindrical rod. When the cylindrical block is located at the slot, the second spring will return to its original state and insert the cylindrical block into the slot to fix the relative position between the rectangular rod and the sleeve rod. The position and angle of the baffle are limited by the rectangular rod and the sleeve rod to prevent the baffle from flying out of the surface of the cabinet as much as possible.

[0023] Preferably, a pressure relief method for a dust-proof pressure relief device of an electrical switch cabinet is also included, comprising the following steps: S1. When a fault occurs inside the cabinet and high-pressure gas is generated, the pressure relief bolt will burst out of the cabinet. At the same time, the high-pressure gas will push the baffle plate to rotate on the left and right sides of the inner wall of the U-shaped rod through the first rotating shaft to change the angle so that the high-pressure air inside the cabinet is released through the angle between the baffle plate and the cabinet to relieve pressure; S2, when the first rotating shaft rotates, it will drive the first bevel gear to rotate, and the first bevel gear drives the second bevel gear to rotate to wrap the long rope around the outer surface of the second bevel gear to control the movement of the slot rod so that the woven net is located in the vacant position after the baffle is opened, and the woven net is used to block it to prevent the parts inside the cabinet from being blown out by the high-pressure gas as much as possible. At the same time, the positioning rod is moved synchronously to move the positioning rod on one side of the baffle for a distance. When the baffle rotates to a certain angle, the outer surface will contact one side of the positioning rod, and the baffle is blocked by the positioning rod for buffering, and the angle and position of the baffle are further limited by the rectangular rod and sleeve rod of the stabilizing device, so as to prevent the baffle from rotating too much and leaving the surface of the cabinet as much as possible. When the first rotating shaft rotates, the second long rope will be wrapped around the outer surface of the first rotating shaft to drive the second rotating shaft and the fan blades to rotate to generate negative pressure suction to suck dust into the interior of the slot plate; S3. The negative pressure suction force generated by the rotation of the second rotating shaft and the fan blades sucks the dust into the interior of the slot plate and then enters the interior of the collection box through the drop slot for collection. The collection box can be taken out by pulling out the collection box to clean the dust.

[0024] In summary, the beneficial effects of the present invention are: By setting a protective device, when a fault occurs inside the cabinet and high-pressure gas is generated, the baffle is rotated on the left and right sides of the inner wall of the U-shaped rod through the first rotating shaft to change the angle. The second bevel gear is driven to rotate through the first bevel gear to wrap the long rope around the outer surface of the second bevel gear to control the movement of the slot rod so that the woven net is located in the gap after the baffle is opened, thereby avoiding as much as possible the parts inside the cabinet from being blown out by the high-pressure gas. The first rotating shaft rotates to wrap the second long rope around the outer surface of the first rotating shaft, which can drive the second rotating shaft and the fan blades to rotate and generate negative pressure suction to suck dust into the interior of the slot plate. At the same time, the positioning rod is moved synchronously to move the positioning rod a distance on one side of the baffle. When the baffle rotates to a certain angle, the outer surface will contact one side of the positioning rod. The baffle is blocked by the positioning rod for buffering, thereby avoiding as much as possible the baffle from rotating too much and leaving the surface of the cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 It is a partial cross-sectional three-dimensional structural schematic diagram of the cabinet of the present invention; Figure 3 The present invention Figure 2 A local enlarged three-dimensional structure schematic diagram; Figure 4 It is a three-dimensional structural schematic diagram of the slot plate of the present invention; Figure 5 It is a schematic diagram of the three-dimensional structure of the braided mesh of the present invention; Figure 6 The present invention Figure 5 A schematic diagram of a partially enlarged three-dimensional structure at B; Figure 7 It is a three-dimensional structural schematic diagram of the slot block of the present invention; Figure 8 It is a three-dimensional structural schematic diagram of the baffle of the present invention; Fig. 9 It is a partial cross-sectional three-dimensional structural schematic diagram of the baffle of the present invention; Fig.10 It is a partial cross-sectional three-dimensional structural schematic diagram of the slot plate of the present invention; Fig.11 It is a three-dimensional structural schematic diagram of the collection box of the present invention; Fig.12 It is a three-dimensional structural schematic diagram of the sleeve rod of the present invention; Fig.13 It is a schematic diagram of the three-dimensional structure of the rectangular rod of the present invention; Fig.14 The present invention Fig.13 Schematic diagram of the partially enlarged three-dimensional structure at point C.

[0026] Description of reference numerals: 1. baffle; 2. protective device; 3. stabilizing device; 4. cabinet; 5. U-shaped rod; 6. first rotating shaft; 7. pressure relief bolt; 21. first bevel gear; 22. positioning block; 23. threaded rod; 24. second bevel gear; 25. first long rope; 26. slot rod; 27. braided net; 28. first slide groove; 29. ​​sliding rod; 210. first spring; 211. square block; 212. clamping block; 213. threaded ring; 214. first L-shaped rod; 215. positioning rod; 216. slot block; 217. slider; 218. gear rod; 219. second L-shaped rod; 220. clamping groove; 221. square groove; 222. flat gear; 223. first Three L-shaped rods; 224, second long rope; 225, threaded cylinder; 226, rectangular groove; 227, sliding plate; 228, convex piece; 229, guide ring; 230, second rotating shaft; 231, fan blade; 232, groove plate; 233, screw rod; 234, falling groove; 235, semicircular groove; 236, guide rod; 237, collecting box; 238, semicircular block; 239, convex strip; 240, second sliding groove; 241, placement groove; 31, positioning groove; 32, rectangular rod; 33, third rotating shaft; 34, sleeve rod; 35, convex piece; 36, slot; 37, fourth L-shaped rod; 38, cylindrical rod; 39, cylindrical block; 310, second spring. DETAILED DESCRIPTION

[0027] Reference Figure 1-4As shown, the present embodiment discloses a dustproof and pressure-relieving device for an electrical switch cabinet, comprising a baffle 1 and a U-shaped rod 5, wherein a first rotating shaft 6 is fixedly connected to the top of the inner wall of the baffle 1, and two ends of the first rotating shaft 6 are respectively rotatably connected to the left and right sides of the inner wall of the U-shaped rod 5, and one side of the U-shaped rod 5 is fixedly connected to a cabinet 4, and the baffle 1 is located on one side of the cabinet 4, and two pressure-relieving bolts 7 are threadedly connected to one side of the outer surface of the cabinet 4 near the bottom end of the baffle 1, and the left and right edges of the bottom end of the outer surface of the baffle 1 are located between one side of the outer surface of the cabinet 4 and the head of the pressure-relieving bolt 7, when a fault occurs inside the cabinet 4 and high-pressure gas is generated, the pressure-relieving bolt 7 will be burst out of the cabinet 4, and at the same time, the high-pressure gas will push the baffle 1 so that the baffle 1 rotates on the left and right sides of the inner wall of the U-shaped rod 5 through the first rotating shaft 6 to change the angle so that the high-pressure air inside the cabinet 4 is discharged through the angle between the baffle 1 and the cabinet 4 for pressure relief.

[0028] Reference Figure 1-11As shown, the present embodiment discloses that a protective device 2 is provided on the outer surface of the baffle 1, and the protective device 2 includes two positioning blocks 22, one side of the two positioning blocks 22 is fixedly connected to the left and right sides of the outer surface of the cabinet 4, and one side of the two positioning blocks 22 is rotatably connected to a threaded rod 23, and one end of the threaded rod 23 away from the positioning block 22 is fixedly connected to a second bevel gear 24, and the left and right ends of the outer surface of the first rotating shaft 6 are respectively fixedly connected to the first bevel gear 21, and the outer surface of the first bevel gear 21 is meshed with the outer surface of the second bevel gear 24, and the diameter of the first bevel gear 21 is larger than the diameter of the second bevel gear 24, and a first slide groove 28 and a placement groove 241 are provided on the inner side of the cabinet 4 close to the baffle 1, and the left and right sides of the outer surface of the cabinet 4 are opened A square groove 221 is provided, and a groove rod 26 is slidably connected to the inner wall of the first slide groove 28. A woven net 27 is provided at the bottom end of the groove rod 26. The top and bottom ends of the woven net 27 are respectively fixedly connected to the bottom end of the groove rod 26 and the bottom end of the inner wall of the placement groove 241. A first long rope 25 is wound around the outer surface of the second bevel gear 24. The first long rope 25 passes through the inner wall of the square groove 221 and the top end of the inner wall of the first slide groove 28. One end of the first long rope 25 away from the second bevel gear 24 is fixedly connected to the top end of the groove rod 26. The left and right sides of the outer surface of the cabinet 4 are respectively fixedly connected with groove blocks 216. The inner wall of the groove block 216 is slidably connected with a first L-shaped rod 214. The top end of the first L-shaped rod 214 is fixedly connected with a threaded ring 213. The inner wall of the threaded ring 213 is connected to the threaded rod The outer surface of the baffle 1 is fixedly connected, one end of the first L-shaped rod 214 away from the threaded ring 213 is fixedly connected to the positioning rod 215, one side of the groove block 216 is slidably connected to a slider 217, the top of the slider 217 is fixedly connected to a gear rod 218, and the bottom of the slider 217 is fixedly connected to a second L-shaped rod 219. The ends of the two first bevel gears 21 away from the first rotating shaft 6 are respectively fixedly connected to a flat gear 222, and the outer surface of the flat gear 222 is meshed with the outer surface of the gear rod 218. A rectangular groove 226 is provided on one side of the outer surface of the baffle 1, and a sliding plate 227 is slidably connected to the inner wall of the baffle 1. Two protruding pieces 228 are fixedly connected to one side of the sliding plate 227, and a groove plate 232 is fixedly connected to the inner wall of the groove plate 232. A second rotating shaft 230 is connected, and a plurality of blades 231 are fixedly connected to the outer surface of the second rotating shaft 230. A screw 233 is fixedly connected to the end of the second rotating shaft 230 away from the blades 231. A threaded barrel 225 is threadedly connected to the outer surface of the screw 233. Two second long ropes 224 are arranged on the outer surface of the threaded barrel 225. The two second long ropes 224 are respectively wound around the outer surface of the threaded barrel 225 in a clockwise and counterclockwise manner. One end of the two second long ropes 224 away from the threaded barrel 225 is respectively fixedly connected to the left and right ends of the outer surface of the first rotating shaft 6. A drop groove 234 is provided at the bottom end of the inner wall of the groove plate 232. Semicircular grooves 235 are respectively provided on the left and right sides of the inner wall of the drop groove 234. A collection box 237 is slidably inserted into the inner wall of the drop groove 234.The left and right sides of the top of the collecting box 237 are respectively fixedly connected with semicircular blocks 238. By setting the protective device 2 and installing the baffle 1 on the surface of the cabinet 4, the top of the collecting box 237 can be inserted into the inside of the falling groove 234 so that the semicircular block 238 is stuck in the inside of the semicircular groove 235 so that the collecting box 237 is located below the groove plate 232. When a fault occurs inside the cabinet 4 and high-pressure gas is generated, the pressure relief bolt 7 will be burst out of the cabinet 4. At the same time, the high-pressure gas will push the baffle 1 so that the baffle 1 rotates on the left and right sides of the inner wall of the U-shaped rod 5 through the first rotating shaft 6 to change the angle so that the high-pressure air inside the cabinet 4 is discharged through the angle between the baffle 1 and the cabinet 4 to relieve the pressure. When the baffle 1 rotates, The two first bevel gears 21 are driven to rotate, and the second bevel gear 24, the threaded rod 23 and the flat gear 222 are driven to rotate through the two first bevel gears 21. When the second bevel gear 24 rotates, the first long rope 25 is wound around the outer surface of the second bevel gear 24. When the first long rope 25 is wound around the outer surface of the second bevel gear 24, the groove rod 26 is pulled to slide upward on the inner wall of the first slide groove 28 so that the groove rod 26 is located at the top of the inner wall of the first slide groove 28 and the woven net 27 is pulled open so that the woven net 27 is located in the vacant position after the baffle 1 is opened, so as to avoid the parts inside the cabinet 4 from being burst out by the high-pressure gas as much as possible. When the threaded rod 23 rotates, the threaded ring 213 is moved on the outer surface of the threaded rod 23 to drive the first L-shaped The rod 214 slides on the inner wall of the groove block 216 in the direction away from the groove block 216 to make the positioning rod 215 move a distance on one side of the baffle 1. When the baffle 1 rotates to a certain angle, the outer surface will contact one side of the positioning rod 215. The baffle 1 is blocked by the positioning rod 215 for buffering to prevent the baffle 1 from rotating too much and leaving the surface of the cabinet 4 as much as possible. When the flat gear 222 rotates, it will push the gear rod 218 to make the slider 217 slide on one side of the outer surface of the groove block 216 and drive the third L-shaped rod 223 to move. When the baffle 1 rotates and the third L-shaped rod 223 moves, one end of the third L-shaped rod 223 will push the two protrusions 228 on one side of the sliding plate 227 to retract the sliding plate 227 into the baffle. 1 opens the rectangular slot 226. As the ends of the two second long ropes 224 away from the second rotating shaft 230 are respectively wound around the outer surface of the threaded barrel 225 clockwise and counterclockwise, when the first rotating shaft 6 rotates to wind the two second long ropes 224 around the surface, the threaded barrel 225 will be pulled to rotate rapidly on the surface of the screw rod 233 and detach from the surface of the screw rod 233, driving the screw rod 233 and the second rotating shaft 230 to rotate. The negative pressure suction force generated by the rotation of the second rotating shaft 230 and the fan blade 231 sucks the dust generated when the high-pressure gas bursts out from the cabinet 4 into the slot plate 232. The dust sucked into the slot plate 232 will enter the inside of the collection box 237 through the drop slot 234 for collection.

[0029] Reference Figure 1-11As shown, the present embodiment discloses that the inner wall of the slot rod 26 is slidably connected to two sliding rods 29, and the ends of the two sliding rods 29 that are away from each other are respectively fixedly connected with a clamping block 212, and the left and right sides of the middle end of the inner wall of the slot rod 26 are respectively provided with a first spring 210, and the two ends of the two first springs 210 are respectively fixedly connected to one side of the sliding rod 29 and one side of the inner wall of the slot rod 26, and the left and right sides of the top of the inner wall of the first sliding groove 28 are respectively provided with a clamping groove 220, and when the slot rod 26 is pulled by the first long rope 25 to slide on the inner wall of the first sliding groove 28, the clamping block 212 at one end of the two sliding rods 29 will press against the left and right sides of the inner wall of the first sliding groove 28 and compress the first spring 210 inside the slot rod 26, and when the slot rod 26 is located at the top of the inner wall of the first sliding groove 28, the two first springs 210 are respectively arranged. The spring 210 will return to its original state and push the two sliding rods 29 to slide away from each other, so that the block 212 at one end of the two sliding rods 29 is inserted into the inside of the slot 220 to further fix the position of the slot rod 26 inside the first slot 28. Two second slots 240 are provided on one side of the slot rod 26. One side of the two sliding rods 29 is fixedly connected with blocks 211 respectively. The outer surface of the block 211 slides on the inner wall of the second slot 240. After the protective device 2 is completed, the outer surface of the two blocks 211 can be pushed by hand to make the blocks 211 slide on the inner wall of the second slot 240 and approach each other. The sliding rod 29 is controlled to slide on the inner wall of the slot rod 26 to make the block 212 disengage from the inside of the slot 220 and retract the slot rod 26 to the bottom end of the inner wall of the first slot 28.

[0030] Reference Figure 1-11As shown, the present embodiment discloses that one side of the outer surface of the U-shaped rod 5 is fixedly connected with two third L-shaped rods 223, and a section of the two second long ropes 224 close to the first rotating shaft 6 is located inside the third L-shaped rod 223. By setting the third L-shaped rod 223, a section of the two second long ropes 224 close to the first rotating shaft 6 can be fixed to avoid as much as possible that the second long ropes 224 are accidentally entangled in other places when the first rotating shaft 6 rotates to pull the second long ropes 224. A guide ring 229 is fixedly connected to one side of the baffle 1. The cross-sectional shape of the guide ring 229 is conical. By setting the conical guide ring 229, the second rotating shaft 230 drives the fan blades 231 to rotate to generate negative pressure suction to suck dust into the interior of the slot plate 232 so that the dust can be The dust can enter through the guide ring 229 in a more concentrated manner. Two guide rods 236 are fixedly connected to the bottom of the inner wall of the groove plate 232 near the side of the drop groove 234. The cross-sectional shape of the two guide rods 236 is conical. After the dust enters the interior of the groove plate 232, it passes through the two guide rods 236 so that the dust can enter the collection box 237 through the drop groove 234 more easily and concentratedly for collection. A plurality of convex strips 239 are fixedly connected on both sides of the outer surface of the collection box 237. The convex strips 239 are linearly distributed on the outer surface of the collection box 237. The collection box 237 can be pulled out from the inside of the drop groove 234 more conveniently by pinching the convex strips 239 on the outer surface of the collection box 237 with your hands.

[0031] Reference Figure 1 , Figure 2 , Figure 8 and Fig.12 , Fig.13 as well as Fig.14As shown, the present embodiment discloses that a stabilizing device 3 is provided at one end of the outer surface of the baffle 1, and the stabilizing device 3 includes two rectangular rods 32, one end of the two rectangular rods 32 is respectively fixedly connected to a third rotating shaft 33, and one end of the two rectangular rods 32 away from the third rotating shaft 33 is respectively slidably connected to a sleeve rod 34, and one end of the sleeve rod 34 away from the rectangular rod 32 is rotatably connected to the outer surface of the cabinet 4, and the left and right sides of the outer surface of the rectangular rod 32 are respectively fixedly connected to a fourth L-shaped rod 37, and one end of the fourth L-shaped rod 37 is fixedly connected to a cylindrical rod 38, and the outer surface of the cylindrical rod 38 is slidably connected to a cylindrical block 39, and a second spring 310 is provided inside the cylindrical block 39, and the two ends of the second spring 310 are respectively fixedly connected to one end of the cylindrical rod 38 and one side of the inner wall of the cylindrical block 39, and the left and right sides of the end of the sleeve rod 34 away from the cabinet 4 are fixedly connected to two protrusions 35, and the outer surfaces of the two protrusions 35 are provided with slots 36, and one end of the baffle 1 is provided with two positioning grooves 31. The two ends of the outer surface of 3 are rotatably connected with the inner wall of the positioning groove 31. When the internal pressure relief of the cabinet body 4 causes the rotation angle of the baffle 1 to change, the third rotating shaft 33 will rotate on the inner wall of the positioning groove 31 to change the angle between the rectangular rod 32 and the baffle 1. At the same time, the rectangular rod 32 will slide on the inner wall of the sleeve rod 34 to gradually increase the total length of the rectangular rod 32 and the sleeve rod 34. During the sliding of the rectangular rod 32, one end of the two cylindrical blocks 39 will slide on the left and right sides of the outer surface of the sleeve rod 34. When one end of the cylindrical block 39 slides on the outer surface of the protrusion 35, it will compress the second spring 310 inside the cylindrical block 39 to make the cylindrical block 39 slide on the outer surface of the cylindrical rod 38. When the cylindrical block 39 is located at the slot 36, the second spring 310 will restore the original state and insert the cylindrical block 39 into the interior of the slot 36 to fix the relative position between the rectangular rod 32 and the sleeve rod 34. The position and angle of the baffle 1 are restricted by the rectangular rod 32 and the sleeve rod 34 to prevent the baffle 1 from detaching from the surface of the cabinet body 4 and flying out as much as possible.

[0032] The working principle is as follows: when a fault occurs inside the cabinet 4 and high-pressure gas is generated, the pressure relief bolt 7 will burst out of the cabinet 4. At the same time, the high-pressure gas will push the baffle 1 so that the baffle 1 rotates on the left and right sides of the inner wall of the U-shaped rod 5 through the first rotating shaft 6 to change the angle so that the high-pressure air inside the cabinet 4 is discharged through the angle between the baffle 1 and the cabinet 4 to relieve the pressure. When the first rotating shaft 6 rotates, it will drive the first bevel gear 21 to rotate, and the second bevel gear 24 is driven to rotate through the first bevel gear 21 to wrap the long rope around the outer surface of the second bevel gear 24 to control the movement of the groove rod 26 so that the woven net 27 is located in the vacant position after the baffle 1 is opened. The woven net 27 is used to block the parts inside the cabinet 4 from being burst out by the high-pressure gas as much as possible. At the same time, the positioning rod 215 is moved synchronously so that the positioning rod 215 moves a distance on one side of the baffle 1. The baffle 1 is blocked by the positioning rod 215 for buffering, and the rectangular rod 32 and the sleeve rod 34 of the stabilizing device 3 further limit the angle and position of the baffle 1, so as to avoid the baffle 1 from rotating too much and leaving the surface of the cabinet 4 as much as possible. When the first rotating shaft 6 rotates, the second long rope 224 will be wrapped around the outer surface of the first rotating shaft 6 to drive the second rotating shaft 230 and the fan blades 231 to rotate to generate negative pressure suction to suck dust into the slot plate 232. The dust is sucked into the slot plate 232 by the negative pressure suction generated by the rotation of the second rotating shaft 230 and the fan blades 231, and then enters the collection box 237 through the falling groove 234 for collection. The collection box 237 can be taken out by pulling out the collection box 237 to clean the dust.

Claims

1. A dust-proof and pressure-relieving device for an electrical switch cabinet, comprising a baffle (1) and a U-shaped rod (5), characterized in that: A first rotating shaft (6) is fixedly connected to the top of the inner wall of the baffle (1), and two ends of the first rotating shaft (6) are rotatably connected to the left and right sides of the inner wall of the U-shaped rod (5) respectively; one side of the U-shaped rod (5) is fixedly connected to the cabinet (4); the baffle (1) is located on one side of the cabinet (4); two pressure relief bolts (7) are threadedly connected to one side of the outer surface of the cabinet (4) near the bottom end of the baffle (1); and the left and right edges of the bottom end of the outer surface of the baffle (1) are located between one side of the outer surface of the cabinet (4) and the heads of the pressure relief bolts (7).

2. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 1, characterized in that: The outer surface of the baffle (1) is provided with a protective device (2), the protective device (2) comprising two positioning blocks (22), one side of the two positioning blocks (22) being fixedly connected to the left and right sides of the outer surface of the cabinet (4), one side of the two positioning blocks (22) being rotatably connected to a threaded rod (23), one end of the threaded rod (23) away from the positioning block (22) being fixedly connected to a second bevel gear (24), the left and right ends of the outer surface of the first rotating shaft (6) being fixedly connected to a first bevel gear (21), the outer surface of the first bevel gear (21) being meshed with the outer surface of the second bevel gear (24), and the diameter of the first bevel gear (21) being larger than the diameter of the second bevel gear (24). A first slide groove (28) and a placement groove (241) are provided on one side of the interior of the cabinet (4) near the baffle (1); square grooves (221) are provided on the left and right sides of the outer surface of the cabinet (4); a groove rod (26) is slidably connected to the inner wall of the first slide groove (28); a woven net (27) is provided at the bottom end of the groove rod (26); the top and bottom ends of the woven net (27) are respectively fixedly connected to the bottom end of the groove rod (26) and the bottom end of the inner wall of the placement groove (241); a first long rope (25) is wound around the outer surface of the second bevel gear (24); the first long rope (25) passes through the inner wall of the square groove (221) and the top end of the inner wall of the first slide groove (28); the first long rope (25) is away from the second bevel gear One end of the wheel (24) is fixedly connected to the top of the slot rod (26); the left and right sides of the outer surface of the cabinet (4) are respectively fixedly connected with slot blocks (216); the inner wall of the slot block (216) is slidably connected with a first L-shaped rod (214); the top of the first L-shaped rod (214) is fixedly connected with a threaded ring (213); the inner wall of the threaded ring (213) is fixedly connected to the outer surface of the threaded rod (23); one end of the first L-shaped rod (214) away from the threaded ring (213) is fixedly connected with a positioning rod (215); one side of the slot block (216) is slidably connected with a slider (217); the top of the slider (217) is fixedly connected with a gear rod (218); the bottom end of the slider (217) is fixedly connected with a toothed rod (218); A second L-shaped rod (219) is fixedly connected thereto; one end of the two first bevel gears (21) away from the first rotating shaft (6) is respectively fixedly connected to a flat gear (222); the outer surface of the flat gear (222) is meshed with the outer surface of the gear rod (218); a rectangular groove (226) is provided on one side of the outer surface of the baffle plate (1); a sliding plate (227) is slidably connected to the inner wall of the baffle plate (1); two protruding pieces (228) are fixedly connected to one side of the sliding plate (227); a slot plate (232) is fixedly connected to one side of the baffle plate (1); the inner wall of the slot plate (232) is rotatably connected to a second rotating shaft (230); and a plurality of fan blades (231) are fixedly connected to the outer surface of the second rotating shaft (230).The end of the second rotating shaft (230) away from the fan blade (231) is fixedly connected to a screw rod (233), the outer surface of the screw rod (233) is threadedly connected to a threaded barrel (225), the outer surface of the threaded barrel (225) is provided with two second long ropes (224), the two second long ropes (224) are respectively wound around the outer surface of the threaded barrel (225) in a clockwise and counterclockwise manner, the ends of the two second long ropes (224) away from the threaded barrel (225) are respectively fixedly connected to the left and right ends of the outer surface of the first rotating shaft (6), the bottom end of the inner wall of the groove plate (232) is provided with a drop groove (234), the left and right sides of the inner wall of the drop groove (234) are respectively provided with semicircular grooves (235), the inner wall of the drop groove (234) is slidably inserted with a collection box (237), and the left and right sides of the top of the collection box (237) are respectively fixedly connected with semicircular blocks (238).

3. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: The inner wall of the slot rod (26) is slidably connected to two sliding rods (29), and the ends of the two sliding rods (29) that are away from each other are respectively fixedly connected to a clamping block (212). First springs (210) are respectively arranged on the left and right sides of the middle end of the inner wall of the slot rod (26), and the two ends of the two first springs (210) are respectively fixedly connected to one side of the sliding rod (29) and one side of the inner wall of the slot rod (26). The inner wall top of the first sliding groove (28) is respectively provided with a clamping groove (220) on the left and right sides.

4. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 3, characterized in that: Two second sliding grooves (240) are provided on one side of the groove rod (26), and blocks (211) are fixedly connected to one side of the two sliding rods (29), respectively, and the outer surface of the block (211) slides on the inner wall of the second sliding groove (240).

5. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: Two third L-shaped rods (223) are fixedly connected to one side of the outer surface of the U-shaped rod (5), and a section of the two second long ropes (224) close to the first rotating shaft (6) is located inside the third L-shaped rod (223).

6. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: A guide ring (229) is fixedly connected to one side of the baffle (1); the cross-sectional shape of the guide ring (229) is conical.

7. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: Two guide rods (236) are fixedly connected to one side of the bottom end of the inner wall of the slot plate (232) close to the drop slot (234), and the cross-section shape of the two guide rods (236) is conical.

8. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: A plurality of convex strips (239) are respectively fixedly connected to both sides of the outer surface of the collection box (237), and the convex strips (239) are linearly distributed on the outer surface of the collection box (237).

9. The dust-proof and pressure-relieving device for an electrical switch cabinet according to claim 2, characterized in that: A stabilizing device (3) is provided at one end of the outer surface of the baffle (1), the stabilizing device (3) comprising two rectangular rods (32), one end of the two rectangular rods (32) being fixedly connected to a third rotating shaft (33), one end of the two rectangular rods (32) being away from the third rotating shaft (33) being slidably connected to a sleeve rod (34), one end of the sleeve rod (34) being away from the rectangular rod (32) being rotatably connected to the outer surface of the cabinet (4), the left and right sides of the outer surface of the rectangular rod (32) being fixedly connected to a fourth L-shaped rod (37), one end of the fourth L-shaped rod (37) being fixedly connected to a cylindrical rod (38), The outer surface of the cylindrical rod (38) is slidably connected to a cylindrical block (39), a second spring (310) is arranged inside the cylindrical block (39), and two ends of the second spring (310) are respectively fixedly connected to one end of the cylindrical rod (38) and one side of the inner wall of the cylindrical block (39), two protrusions (35) are fixedly connected to the left and right sides of one end of the sleeve rod (34) away from the cabinet (4), and slots (36) are provided on the outer surfaces of the two protrusions (35), one end of the baffle (1) is provided with two positioning grooves (31), and the two ends of the outer surface of the third rotating shaft (33) are rotatably connected to the inner wall of the positioning groove (31).

10. A pressure relief method according to claim 1, characterized in that: A pressure relief method for a dust-proof pressure relief device for an electrical switch cabinet as claimed in any one of claims 1 to 9 comprises the following steps: S1. When a fault occurs inside the cabinet (4) and high-pressure gas is generated, the pressure relief bolt (7) will be pushed out of the cabinet (4). At the same time, the high-pressure gas will push the baffle (1) so that the baffle (1) rotates on the left and right sides of the inner wall of the U-shaped rod (5) through the first rotating shaft (6) to change the angle so that the high-pressure air inside the cabinet (4) is released through the angle between the baffle (1) and the cabinet (4) to relieve the pressure; S2, when the first rotating shaft (6) rotates, it drives the first bevel gear (21) to rotate, and the first bevel gear (21) drives the second bevel gear (24) to rotate, so that the long rope is wrapped around the outer surface of the second bevel gear (24), and the control groove rod (26) moves so that the braided net (27) is located in the vacant position after the baffle (1) is opened, and the braided net (27) is used to block as much as possible to prevent the parts inside the cabinet (4) from being burst out by the high-pressure gas, and at the same time, the positioning rod (215) is moved synchronously so that the positioning rod (215) moves a certain distance on one side of the baffle (1), and the baffle (1) rotates to a certain position. When the first rotating shaft (6) rotates, the second long rope (224) is wound around the outer surface of the first rotating shaft (6), driving the second rotating shaft (230) and the fan blades (231) to rotate, thereby generating a negative pressure suction force to suck dust into the interior of the slot plate (232); S3. The negative pressure suction force generated by the rotation of the second rotating shaft (230) and the fan blades (231) sucks the dust into the interior of the slot plate (232) and then enters the interior of the collection box (237) through the drop slot (234) for collection. The collection box (237) can be pulled out to remove the dust.

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