Switchgear Safety Protection Device and Method Based on Intelligent Disconnection Warning Analysis

Abstract

The present invention relates to the technical field of switch cabinets. Specifically, it relates to a safety protection device and method for switch cabinets based on intelligent disconnection warning analysis, including a cabinet body. Heat dissipation components for heat dissipation are provided on the left and right side walls of the cabinet body. A pressure relief protection component for short-circuit pressure relief protection is provided near the top inside the cabinet body. The pressure relief protection component includes a pressure relief chamber structure fixed at the rear side near the top surface of the cabinet body, a baffle structure for connecting the cabinet body and the pressure relief chamber structure, an upward pushing structure for driving the baffle structure to open, and two window closing structures for closing the heat dissipation components. With this protection device, by setting the pressure relief protection component, when an electric arc occurs inside the switch cabinet and gas expands, pressure relief is carried out, and at the same time, the heat dissipation window is closed to prevent the expanded gas from escaping from the heat dissipation window and affecting surrounding electrical appliances or burning the staff. In addition, by setting the pressure relief chamber structure, the expanded gas entering the chamber is cooled to further reduce the risk.

Description

Technical Field

[0001] The invention belongs to the technical field of switch cabinets, and particularly relates to a safety protection device and method for switch cabinets based on intelligent disconnection warning analysis. Background Art

[0002] A switch cabinet is an important device for controlling, protecting, or monitoring the entire circuit in a circuit system. Generally, intelligent disconnection warning analysis components are provided inside the existing switch cabinets to control the entire circuit.

[0003] For example, the invention patent with the authorization announcement number CN118920291A in the technical field of switch cabinets discloses a switch cabinet with a safety protection mechanism, which includes a mounting base. The top of the mounting base is fixedly connected with a switch cabinet body including a cabinet door. On both sides inside the switch cabinet body, C-shaped partition plates are symmetrically and fixedly connected. On the opposite sides of the C-shaped partition plates, multiple groups of parallel plastic sheets are arranged. When the breaking mechanism displaces, pressure is generated inside, and the filled fire extinguishing powder is sprayed into the inside of the switch cabinet body, effectively preventing and extinguishing open flames and protecting the internal electronic components.

[0004] Combined with the above case and the actual situation, we found the following problems: During the use of the switch cabinet, if problems such as electrical component failures or circuit short circuits occur, an electric arc is likely to appear inside the switch cabinet, causing the surrounding gas to expand instantaneously due to heat. Therefore, it is necessary to relieve the pressure inside the switch cabinet. Generally, the existing switch cabinets require heat dissipation windows. When relieving the pressure, the switch cabinet cannot close the heat dissipation windows simultaneously, resulting in the high-temperature and high-pressure expanding gas being easily released from the heat dissipation windows, causing damage to the surrounding electrical appliances or injury to nearby workers. Summary of the Invention

[0005] The purpose of the invention is to provide a safety protection device and method for switch cabinets based on intelligent disconnection warning analysis to solve the above problems of the prior art.

[0006] To achieve the above purpose, the invention provides a safety protection device for switch cabinets based on intelligent disconnection warning analysis, which includes a cabinet body. Heat dissipation components for heat dissipation are provided on the left and right side walls of the cabinet body. A pressure relief protection component for short-circuit pressure relief protection is provided near the top inside the cabinet body. The pressure relief protection component includes a pressure relief chamber structure fixed at the rear side near the top surface of the cabinet body, a baffle structure for communicating the cabinet body and the pressure relief chamber structure, an upward pushing structure for driving the baffle structure to open, and two window closing structures for closing the heat dissipation components;

[0007] A pressure relief channel is provided in the middle of the top surface of the cabinet body. The baffle structure includes a baffle arranged in the pressure relief channel and a baffle shaft arranged horizontally on the left and right. The baffle shaft penetrates through the center of the baffle and the two are fixedly connected. Axial grooves are symmetrically arranged on the left and right sides of the inner wall of the pressure relief channel. Both ends of the baffle shaft extend into the corresponding axial grooves. A clockwork spring is arranged between the outer wall of the baffle shaft and the inner wall of the axial groove. A convex plate is arranged on the axial surface of the baffle shaft. A clamping plate for blocking the convex plate is fixed at the top of the pressure relief channel.

[0008] The top structure includes two top mechanisms symmetrically arranged on the left and right sides of the pressure relief channel and a transmission mechanism arranged between the two top mechanisms. The top mechanism includes a cover plate, a top rod fixedly connected to the top surface of the cover plate at the bottom end, and a wedge block fixed at the top end of the top rod. The transmission mechanism includes a cross bar arranged at the rear side of the pressure relief channel and two abutting rods vertically fixed at both ends of the cross bar. The front end of the abutting rod abuts against the inclined surface of the corresponding wedge block. Connecting rods are symmetrically arranged on the left and right sides of the front side of the middle section of the wedge block. The front ends of the two connecting rods are fixed with the same limiting plate.

[0009] In the technical solution of the present invention, a second installation groove for the front and rear sliding of the transmission mechanism is provided on the top surface of the cabinet body. A limiting plate groove for the front and rear sliding of the limiting plate is provided on the front side of the middle of the second installation groove. The limiting plate groove is located below the baffle. Two sliding cavities for the front and rear sliding of the connecting rods are arranged between the limiting plate groove and the second installation groove.

[0010] In the technical solution of the present invention, a flange plate is fixed on the outer wall of the connecting rod near the front end. A spring is arranged between the flange plate and the rear side wall of the corresponding sliding cavity.

[0011] In the technical solution of the present invention, a top channel corresponding to the position of the top rod is provided at the top of the cabinet body. The top end of the top rod is located in the corresponding top channel and the two are slidably connected. Limiting blocks are symmetrically arranged on the left and right sides of the top end of the top rod. The limiting blocks are embedded in the inner side wall of the corresponding top channel and the two are slidably connected.

[0012] In the technical solution of the present invention, first installation grooves are symmetrically arranged on the left and right sides of the top surface of the cabinet body. The two window closing structures are arranged in the corresponding first installation grooves. The window closing structure includes a cable, a first roller and a second roller arranged in the first installation groove, and a rotating rod arranged at the rear side of the cabinet body.

[0013] In the technical solution of the present invention, the height of the first roller is lower than that of the second roller. One end of the cable is fixed to the outer side wall of the limiting block on the outer side of the corresponding side push rod, and the other end passes through the lower side of the corresponding side first roller and is fixed to the side wall of the corresponding side second roller. A first worm is coaxially fixed to the rear end of the second roller. The rotating rod is vertically arranged inside the corresponding second roller, and a first worm gear meshing with the first worm is coaxially fixed to the top end of the rotating rod.

[0014] In the technical solution of the present invention, heat dissipation windows are provided on the left and right side walls of the cabinet body, and the heat dissipation component is arranged in the heat dissipation windows. The heat dissipation component includes a plurality of regularly arranged fan blades and a fan blade shaft passing through the fan blades from front to back. The fan blades are fixedly connected to the corresponding fan blade shafts. A second worm gear is coaxially fixed to the rear end of the fan blade shaft. A plurality of second worms corresponding to the plurality of fan blade shafts one by one are coaxially fixed on the rotating rod, and the second worms mesh with the second worm gears.

[0015] In the technical solution of the present invention, the pressure relief chamber structure includes a chamber body and a plurality of tracheal mechanisms regularly arranged in the chamber body. An air chamber for storing inert gas is fixed above the chamber body. A pressing rod is horizontally fixed to the rear side of the middle of the cross bar. A pressing rod groove corresponding to the pressing rod is provided on the rear side wall of the second installation groove, and a button for controlling the air pump in the air chamber is provided on the rear wall of the pressing rod groove.

[0016] In the technical solution of the present invention, the tracheal mechanism includes an inner tube with a top end passing through the top surface of the chamber body and communicating with the inside of the air chamber, and an outer tube sleeved outside the inner tube and rotatably connected. A spiral blade is fixed to the outer wall of the outer tube. A plurality of regularly distributed air holes are provided on the tube walls of both the inner tube and the outer tube, and the air holes on the inner tube and the air holes on the outer tube are in corresponding positions.

[0017] On the other hand, the present invention also provides a safety protection method for switch cabinets based on intelligent disconnection warning analysis, including the following steps:

[0018] S1. When abnormal conditions occur in the electrical components inside the switch cabinet, such as the generation of electric arcs or short circuits, the gas inside the switch cabinet expands rapidly and pushes up the cover plate, thereby driving the push rod and the wedge block to slide upward. The sliding wedge block will push the abutting rod to slide backward and drive the cross bar to slide backward;

[0019] S2. The backward-sliding cross bar pulls the limiting plate back into the limiting plate groove through the connecting rod. At the same time, the pressing rod presses the button to open the air pump in the air chamber. At this time, under the elastic force of the spring, the baffle is driven to rotate clockwise, and under the limitation of the convex plate and the clamping plate, the baffle is static in a vertical state;

[0020] S3. While sliding on the ejector rod, the limit block will pull the cable towards the middle, thereby pulling the second roller to rotate clockwise through the first roller, and driving the rotating rod to rotate through the transmission of the first worm and the first worm gear, and then driving the fan blade to rotate and close through the second worm and the second worm gear;

[0021] S4. After the baffle rotates and opens, the high-temperature and high-pressure expanding gas enters the cabinet body through the pressure relief channel to relieve pressure, and blows the spiral blade to drive the outer tube to rotate. When the pores on the outer tube and the inner tube coincide, the inert gas in the gas chamber will enter the cabinet body to cool down the expanding gas.

[0022] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0023] 1. In the present invention, by setting up a pressure relief and protection component, when an electric arc is generated inside the switch cabinet, the gas inside the switch cabinet expands rapidly and pushes up the cover plate, thereby driving the ejector rod and the wedge block to slide upward to push the abutting rod to slide backward, and driving the cross bar to slide backward, and then pulling the limiting plate back into the limiting plate groove through the connecting rod. At this time, under the elastic force of the hairspring, the baffle is driven to rotate clockwise to open the pressure relief channel for pressure relief, ensuring the safe use of the switch cabinet.

[0024] 2. In the present invention, by setting up a window closing structure, while the ejector rod slides upward, the limit block will pull the cable towards the middle, thereby pulling the second roller to rotate clockwise through the first roller, and driving the rotating rod to rotate through the transmission of the first worm and the first worm gear, and then driving the fan blade to rotate and close through the second worm and the second worm gear, avoiding the escape of high-temperature and high-pressure expanding gas from the heat dissipation window, and protecting the safety of surrounding electrical appliances and nearby staff.

[0025] 3. In the present invention, by setting up a pressure relief chamber structure, while the baffle rotates clockwise and opens, the pressing rod presses the button to open the air pump in the gas chamber. The expanding gas enters the cabinet body through the pressure relief channel to relieve pressure, and blows the spiral blade to drive the outer tube to rotate. When the pores on the outer tube and the inner tube coincide, the inert gas in the gas chamber will enter the cabinet body to cool down the expanding gas. At the same time, the airflow generated by the rotation of the spiral blade will accelerate the mixing of the expanding gas and the inert gas, further accelerating the cooling and protecting the safety cabinet. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0027] Figure 2 is a schematic diagram of the cabinet body of the present invention;

[0028] Figure 3 is a cross-sectional view of the top of the cabinet body in the present invention;

[0029] Figure 4 of the present invention Figure 3Enlarged view at location A in [the figure];

[0030] Figure 5 Explosion diagram of the pressure relief and protection component in the present invention;

[0031] Figure 6 Another cross-sectional view of the top of the cabinet body in the present invention;

[0032] Figure 7 Schematic diagram of the top structure in the present invention;

[0033] Figure 8 Schematic diagram of the window closing structure in the present invention;

[0034] Figure 9 Schematic diagram of the interior of the bin body in the present invention;

[0035] Figure 10 Explosion diagram of the air pipe mechanism in the present invention;

[0036] Explanation of reference numerals in the drawings:

[0037] 1. Cabinet body; 11. Heat dissipation window; 12. Pressure relief channel; 121. Clamping plate; 13. Shaft groove; 14. First installation groove; 15. Limiting plate groove; 16. Sliding cavity; 17. Spring; 18. Second installation groove; 181. Pressing rod groove; 19. Top-up channel;

[0038] 2. Heat dissipation component; 21. Fan blade; 22. Fan blade shaft; 23. Second worm gear;

[0039] 3. Pressure relief and protection component; 31. Baffle structure; 311. Baffle; 312. Baffle shaft; 313. Hairspring; 314. Convex plate; 32. Top-up structure; 321. Top-up mechanism; 3211. Cover plate; 3212. Jacking rod; 3213. Wedge block; 3214. Limiting block; 322. Transmission mechanism; 3221. Abutting rod; 3222. Cross bar; 3223. Connecting rod; 3224. Limiting plate; 3225. Flange plate; 3226. Pressing rod; 33. Window closing structure; 331. Cable; 332. First roller; 333. Second roller; 3331. First worm; 334. Rotating rod; 3341. First worm gear; 3342. Second worm; 34. Pressure relief bin structure; 341. Bin body; 342. Air pipe mechanism; 3421. Inner pipe; 3422. Outer pipe; 3423. Spiral blade; 3424. Air hole;

[0040] 4. Air chamber;

[0041] 5. Button. Detailed implementation manners

[0042] The following will describe in detail the specific implementation manners of the present invention with reference to the accompanying drawings. It should be understood, however, that the protection scope of the present invention is not limited by the specific implementation manners.

[0043] Unless otherwise expressly stated, throughout the specification, the term "comprising" or its variations such as "including" or "having" etc. will be understood to include the stated elements or components, without excluding other elements or other components.

[0044] Referring to Figures 1 - 10 as shown, this embodiment provides a technical solution:

[0045] A safety protection device for switchgear based on intelligent disconnection warning analysis, comprising a cabinet body 1. Heat dissipation components 2 for heat dissipation are provided on the left and right side walls of the cabinet body 1, and the heat dissipation components 2 are used to dissipate heat for the electrical components inside the switchgear. A pressure relief protection component 3 for short - circuit pressure relief protection is provided near the top inside the cabinet body 1. The pressure relief protection component 3 includes a pressure relief chamber structure 34 fixed at the rear side near the top surface of the cabinet body 1, a baffle structure 31 for connecting the cabinet body 1 and the pressure relief chamber structure 34, an upward - pushing structure 32 for driving the baffle structure 31 to open, and two window - closing structures 33 for closing the heat dissipation components 2. By setting the pressure relief protection component 3, when a short - circuit occurs inside the switchgear, components are damaged and an electric arc is generated, causing the gas inside the switchgear to expand due to heat, pressure relief is carried out to avoid the explosion inside the switchgear caused by the failure of the high - temperature and high - pressure expanded gas to escape in time;

[0046] A pressure relief channel 12 is provided in the middle of the top surface of the cabinet body 1. The baffle structure 31 includes a baffle 311 arranged in the pressure relief channel 12 and a baffle shaft 312 horizontally arranged on the left and right. The baffle shaft 312 passes through the center of the baffle 311 and the two are fixedly connected. Axial grooves 13 are symmetrically provided on the left and right sides of the inner wall of the pressure relief channel 12. Both ends of the baffle shaft 312 extend into the corresponding axial grooves 13. A clockwork spring 313 is provided between the outer wall of the baffle shaft 312 and the inner wall of the axial groove 13. The clockwork spring 313 gives the baffle shaft 312 a clockwise rotation torque. A convex plate 314 is provided on the shaft surface of the baffle shaft 312, and a clamping plate 121 for blocking the convex plate 314 is fixed at the top of the pressure relief channel 12. The convex plate 314 is horizontally arranged and is located in front of the clamping plate 121. By setting the convex plate 314 and the clamping plate 121, when the pressure relief channel 12 is opened, the baffle 311 is in a vertical state, avoiding the inclination of the baffle 311 and reducing the pressure relief cross - sectional area of the pressure relief channel 12, which affects the pressure relief of the expanded gas;

[0047] The upper top structure 32 includes two upper top mechanisms 321 symmetrically arranged on the left and right sides of the pressure relief channel 12 and a transmission mechanism 322 arranged between the two upper top mechanisms 321. The upper top mechanism 321 includes a cover plate 3211, a top rod 3212 fixedly connected to the top surface of the cover plate 3211 at the bottom end, and a wedge block 3213 fixedly connected to the top end of the top rod 3212. The transmission mechanism 322 includes a cross bar 3222 arranged at the rear side of the pressure relief channel 12 and two abutting rods 3221 vertically fixed at both ends of the cross bar 3222. The front end of the abutting rod 3221 abuts against the inclined surface of the corresponding wedge block 3213, and the abutting rod 3221 is in the shape of an inclined surface that fits the inclined surface of the wedge block 3213. On the left and right sides of the front side of the middle section of the wedge block 3213, connecting rods 3223 are symmetrically arranged, and a limiting plate 3224 is fixedly connected to the front ends of the two connecting rods 3223. When the gas inside the switch cabinet expands, the cover plate 3211 will be pushed upward, driving the top rod 3212 and the wedge block 3213 to slide upward. The sliding wedge block 3213 will push the abutting rod 3221 to slide backward, driving the cross bar 3222 to slide backward. The sliding backward cross bar 3222 pulls the limiting plate 3224 back into the limiting plate groove 15 through the connecting rod 3223. At this time, the restriction of the baffle 311 can be released, and the baffle 311 rotates 90° to open the pressure relief channel 12.

[0048] Further, as Figures 1 - 6 shown, a second installation groove 18 for the forward and backward sliding of the transmission mechanism 322 is provided on the top surface of the cabinet body 1. A limiting plate groove 15 for the forward and backward sliding of the limiting plate 3224 is provided at the front side of the middle part of the second installation groove 18. The limiting plate groove 15 is located below the baffle 311. Two sliding cavities 16 for the forward and backward sliding of the connecting rod 3223 are provided between the limiting plate groove 15 and the second installation groove 18. A flange plate 3225 is fixedly connected to the outer wall of the connecting rod 3223 near the front end. A spring 17 is provided between the flange plate 3225 and the rear side wall of the corresponding sliding cavity 16. By providing the spring 17 and the flange plate 3225, when the switch cabinet is in normal use, the spring 17 gives a forward thrust to the flange plate 3225, making the limiting plate 3224 extend out of the limiting plate groove 15 to block the clockwise rotation of the baffle 311 and ensuring the normal use of the switch cabinet.

[0049] In addition, as Figure 6 shown, an upper top channel 19 corresponding to the position of the top rod 3212 is provided at the top of the cabinet body 1. The top end of the top rod 3212 is located in the corresponding upper top channel 19 and the two are slidably connected. Symmetrically arranged limiting blocks 3214 are provided at the left and right sides of the top end of the top rod 3212. The limiting blocks 3214 are embedded in the inner side wall of the corresponding upper top channel 19 and the two are slidably connected. By providing the limiting blocks 3214, the rotation of the top rod 3212 during upward sliding is avoided, which may cause the entire upper top structure 32 to malfunction. The cover plate 3211 is in the shape of an inverted umbrella, increasing the force-bearing area to ensure that when the gas expands due to heat, the cover plate 3211 receives sufficient upward pressure.

[0050] Further, asFigures 7 - 8 As shown in the figure, first mounting grooves 14 are symmetrically arranged on the top surface of the cabinet body 1 near the left and right sides. Two window closing structures 33 are arranged in the corresponding first mounting grooves 14. The window closing structure 33 includes a cable 331, a first roller 332 and a second roller 333 arranged in the first mounting groove 14, and a rotating rod 334 arranged at the rear side of the cabinet body 1. By arranging the window closing structure 33, it is ensured that the heat dissipation component 2 is closed while relieving pressure, preventing the expanded gas from directly escaping from the heat dissipation component 2 and affecting the electrical appliances around the switch cabinet or burning the nearby staff.

[0051] In addition, the height of the first roller 332 is lower than that of the second roller 333 to ensure that the cable 331 is in a taut state. One end of the cable 331 is fixed to the outer side wall of the limiting block 3214 on the outer side of the corresponding side top rod 3212, and the other end passes through the lower side of the corresponding first roller 332 and is fixed to the side wall of the corresponding second roller 333. A first worm 3331 is coaxially fixed to the rear end of the second roller 333. The rotating rod 334 is vertically arranged inside the corresponding second roller 333. A first worm gear 3341 meshing with the first worm 3331 is coaxially fixed to the top end of the rotating rod 334. When the top rod 3212 slides, the limiting blocks 3214 on both sides will pull the cable 331 towards the middle, and then drive the second roller 333 to rotate clockwise through the first roller 332, and drive the rotating rod 334 to rotate through the transmission of the first worm 3331 and the first worm gear 3341.

[0052] Specifically, heat dissipation windows 11 are arranged on the left and right side walls of the cabinet body 1. The heat dissipation component 2 is arranged in the heat dissipation windows 11. The heat dissipation component 2 includes a plurality of regularly arranged fan blades 21 and a fan blade shaft 22 passing through the fan blades 21 from front to back. The fan blades 21 are fixedly connected to the corresponding fan blade shafts 22. A second worm gear 23 is coaxially fixed to the rear end of the fan blade shaft 22. A plurality of second worms 3342 corresponding to the plurality of fan blade shafts 22 one by one are coaxially fixed to the rotating rod 334. The second worms 3342 mesh with the second worm gears 23. When the rotating rod 334 rotates, it will drive the fan blades 21 to rotate and close through the second worms 3342 and the second worm gears 23. It should be noted that after the fan blades 21 rotate and close, they are adapted to the area of the heat dissipation windows 11 to prevent the expanded gas from leaking out through the gaps between the fan blades 21 and the heat dissipation windows 11.

[0053] In addition, as Figure 1 、 Figure 6 、 Figure 9 and Figure 10As shown in the figure, the pressure relief chamber structure 34 includes a chamber body 341 and a number of gas pipe mechanisms 342 regularly arranged inside the chamber body 341. Above the chamber body 341, a gas chamber 4 for storing inert gas is fixed. At the rear side of the middle part of the cross bar 3222, a pressing rod 3226 is horizontally fixed. On the rear side wall of the second installation groove 18, there is a pressing rod groove 181 corresponding to the pressing rod 3226. On the rear side wall of the pressing rod groove 181, there is a button 5 for controlling the air pump in the gas chamber 4. The gas chamber 4 stores inert gas. When the cross bar 3222 slides backward to drive the baffle 311 to open, the pressing rod 3226 will press the button 5 to open the air pump in the gas chamber 4. It should be noted that pumping and inflating air by the air pump are prior arts and will not be elaborated here.

[0054] Further, the gas pipe mechanism 342 includes an inner pipe 3421 whose top end passes through the top surface of the chamber body 341 and is in communication with the inside of the gas chamber 4, and an outer pipe 3422 sleeved outside the inner pipe 3421 and rotatably connected. On the outer wall of the outer pipe 3422, a spiral blade 3423 is fixed. A number of regularly distributed air holes 3424 are provided on the pipe walls of both the inner pipe 3421 and the outer pipe 3422. The air holes 3424 on the inner pipe 3421 and the air holes 3424 on the outer pipe 3422 are in corresponding positions. When the high-temperature and high-pressure expansion gas enters the chamber body 341 through the pressure relief channel 12, it will blow the spiral blade 3423 to drive the outer pipe 3422 to rotate. When the air holes 3424 on the outer pipe 3422 and the inner pipe 3421 are in overlapping positions, the inert gas in the gas chamber 4 will enter the chamber body 341 to cool down the expansion gas. The air flow generated by the rotation of the spiral blade 3423 will also accelerate the mixing of the inert gas and the expansion gas, accelerating the cooling.

[0055] The safety protection method for switchgear based on intelligent disconnection warning analysis in the present invention includes the following steps:

[0056] S1. When abnormal conditions occur in the electrical components inside the switchgear, such as the generation of electric arcs or short circuits, the gas inside the switchgear expands rapidly and pushes up the top cover plate 3211, thereby driving the top rod 3212 and the wedge block 3213 to slide upward. The upward-sliding wedge block 3213 will push the abutting rod 3221 to slide backward, driving the cross bar 3222 to slide backward;

[0057] S2. The backward-sliding cross bar 3222 pulls the limiting plate 3224 back into the limiting plate groove 15 through the connecting rod 3223. At the same time, the pressing rod 3226 presses the button 5 to open the air pump in the gas chamber 4. At this time, under the elastic force of the clockwork spring 313, the baffle 311 is driven to rotate clockwise, and under the limitation of the convex plate 314 and the clamping plate 121, the baffle 311 is static in a vertical state;

[0058] S3. While sliding on the ejector rod 3212, the limit block 3214 will pull the cable 331 towards the middle, thereby pulling the second roller 333 to rotate clockwise through the first roller 332, and driving the rotating rod 334 to rotate through the transmission of the first worm 3331 and the first worm gear 3341, and then driving the fan blade 21 to rotate and close through the second worm 3342 and the second worm gear 23;

[0059] S4. After the baffle 311 rotates and opens, the high-temperature and high-pressure expansion gas enters the cavity 341 through the pressure relief channel 12 for pressure relief, and blows the spiral blade 3423 to drive the outer tube 3422 to rotate. When the air holes 3424 on the outer tube 3422 and the inner tube 3421 are aligned, the inert gas in the air chamber 4 will enter the cavity 341 to cool down the expansion gas.

[0060] The foregoing description of the specific exemplary embodiments of the present invention is for the purposes of illustration and exemplification. These descriptions are not intended to limit the invention to the precise forms disclosed, and it is apparent that many changes and variations are possible in light of the above teaching. The purpose of selecting and describing the exemplary embodiments is to explain the specific principles of the invention and its practical applications, so that those skilled in the art can implement and utilize the various different exemplary embodiments of the invention, as well as various different selections and changes. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. Switchgear safety protection device based on intelligent disconnection warning analysis, including a cabinet body (1), characterized in that: The left and right side walls of the cabinet body (1) are provided with heat dissipation components (2) for heat dissipation. Inside the cabinet body (1) and near the top, there is a pressure relief protection component (3) for short-circuit pressure relief protection. The pressure relief protection component (3) includes a pressure relief bin structure (34) fixed to the rear side of the top surface of the cabinet body (1), a baffle structure (31) for communicating the cabinet body (1) and the pressure relief bin structure (34), an upward pushing structure (32) for driving the baffle structure (31) to open, and two window closing structures (33) for closing the heat dissipation components (2); In the middle of the top surface of the cabinet body (1), there is a pressure relief channel (12). The baffle structure (31) includes a baffle (311) arranged in the pressure relief channel (12) and a baffle shaft (312) horizontally arranged on the left and right. The baffle shaft (312) penetrates through the center of the baffle (311) and the two are fixedly connected. On the left and right sides of the inner wall of the pressure relief channel (12), there are symmetrically arranged shaft grooves (13). Both ends of the baffle shaft (312) extend into the corresponding shaft grooves (13). A clockwork spring (313) is arranged between the outer wall of the baffle shaft (312) and the inner wall of the shaft groove (13). A convex plate (314) is arranged on the shaft surface of the baffle shaft (312). A clamping plate (121) for blocking the convex plate (314) is fixed to the top of the pressure relief channel (12); The upward pushing structure (32) includes two upward pushing mechanisms (321) symmetrically arranged on the left and right sides of the pressure relief channel (12) and a transmission mechanism (322) arranged between the two upward pushing mechanisms (321). The upward pushing mechanism (321) includes a cover plate (3211), a top rod (3212) with its bottom end fixedly connected to the top surface of the cover plate (3211), and a wedge block (3213) fixed to the top end of the top rod (3212). The transmission mechanism (322) includes a cross bar (3222) arranged at the rear side of the pressure relief channel (12) and two abutting rods (3221) vertically fixed to both ends of the cross bar (3222). The front end of the abutting rod (3221) abuts against the inclined surface of the corresponding wedge block (3213). On the front side of the middle section of the cross bar (3222), there are symmetrically arranged connecting rods (3223) on the left and right. The front ends of the two connecting rods (3223) are fixed with the same limiting plate (3224); The top surface of the cabinet body (1) is provided with a second installation groove (18) for the front-back sliding of the transmission mechanism (322). The front side of the middle part of the second installation groove (18) is provided with a limiting plate groove (15) for the front-back sliding of the limiting plate (3224). The limiting plate groove (15) is located below the baffle plate (311). There are two sliding cavities (16) for the front-back sliding of the connecting rod (3223) between the limiting plate groove (15) and the second installation groove (18). A flange plate (3225) is fixed to the outer wall of the connecting rod (3223) near the front end. A spring (17) is arranged between the flange plate (3225) and the rear side wall of the corresponding sliding cavity (16). When the switch cabinet is in normal use, the spring (17) pushes the limiting plate (3224) to extend out of the limiting plate groove (15) by pushing the flange plate (3225), blocking the clockwise rotation of the baffle plate (311).

2. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 1, wherein: An upper top channel (19) is provided at the position corresponding to the top rod (3212) on the top of the cabinet body (1). The top end of the top rod (3212) is located in the corresponding upper top channel (19) and they are slidably connected. Limiting blocks (3214) are symmetrically arranged on the left and right sides of the top end of the top rod (3212). The limiting blocks (3214) are embedded in the inner side wall of the corresponding upper top channel (19) and they are slidably connected.

3. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 2, characterized in that: First installation grooves (14) are symmetrically arranged on the left and right sides of the top surface of the cabinet body (1). The two window closing structures (33) are arranged in the corresponding first installation grooves (14). The window closing structure (33) includes a cable (331), a first roller (332) and a second roller (333) arranged in the first installation groove (14), and a rotating rod (334) arranged at the rear side of the cabinet body (1).

4. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 3, wherein: The height of the first roller (332) is lower than that of the second roller (333). One end of the cable (331) is fixed to the outer side wall of the limiting block (3214) on the outer side of the corresponding top rod (3212), and the other end passes through the lower side of the corresponding first roller (332) and is fixed to the side wall of the corresponding second roller (333). A first worm (3331) is coaxially fixed to the rear end of the second roller (333). The rotating rod (334) is vertically arranged inside the corresponding second roller (333). A first worm gear (3341) meshing with the first worm (3331) is coaxially fixed to the top end of the rotating rod (334).

5. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 4, characterized in that: The left and right side walls of the cabinet body (1) are provided with heat dissipation windows (11), the heat dissipation component (2) is arranged in the heat dissipation windows (11), the heat dissipation component (2) includes a number of regularly arranged fan blades (21) and a fan blade shaft (22) that penetrates through the fan blades (21) from front to back, the fan blades (21) are fixedly connected to the corresponding fan blade shafts (22), a second worm gear (23) is coaxially fixed to the rear end of the fan blade shaft (22), a number of second worm shafts (3342) corresponding to the number of fan blade shafts (22) are coaxially fixed on the rotating rod (334), and the second worm shafts (3342) are engaged with the second worm gears (23).

6. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 5, characterized in that: The pressure relief bin structure (34) includes a bin body (341) and a number of tracheal mechanisms (342) regularly arranged in the bin body (341), a gas bin (4) for storing inert gas is fixed above the bin body (341), a pressing rod (3226) is horizontally fixed at the rear side of the middle of the cross bar (3222), a pressing rod groove (181) corresponding to the pressing rod (3226) is provided on the rear side wall of the second installation groove (18), and a button (5) for controlling the air pump in the gas bin (4) is provided on the rear side wall of the pressing rod groove (181).

7. The safety protection device for switchgear based on intelligent disconnection warning analysis according to claim 6, characterized in that: The tracheal mechanism (342) includes an inner tube (3421) with its top end passing through the top surface of the bin body (341) and communicating with the inside of the gas bin (4), and an outer tube (3422) sleeved outside the inner tube (3421) and rotatably connected, a spiral blade (3423) is fixed on the outer wall of the outer tube (3422), a number of regularly distributed air holes (3424) are provided on the tube walls of the inner tube (3421) and the outer tube (3422), and the air holes (3424) on the inner tube (3421) and the air holes (3424) on the outer tube (3422) are in corresponding positions.

8. The safety protection method for switchgear based on intelligent disconnection warning analysis, using the safety protection device for switchgear based on intelligent disconnection warning analysis as described in claim 7, is characterized in that, Including the following steps: S1. When abnormal conditions occur in the electrical components inside the switch cabinet, such as electric arcs or short circuits, the gas inside the switch cabinet expands rapidly and pushes up the cover plate (3211), thereby driving the top rod (3212) and the wedge block (3213) to slide upward. The sliding wedge block (3213) will push the abutting rod (3221) to slide backward and drive the cross bar (3222) to slide backward; S2. The backward-sliding cross bar (3222) pulls the limiting plate (3224) back into the limiting plate groove (15) through the connecting rod (3223). At the same time, the pressing rod (3226) presses the button (5) to turn on the air pump in the gas bin (4). At this time, under the elastic force of the clockwork spring (313), the baffle (311) is driven to rotate clockwise, and under the limitation of the convex plate (314) and the clamping plate (121), the baffle (311) is in a vertical state and remains static; S3. While sliding on the ejector rod (3212), the limit block (3214) will pull the cable (331) towards the middle, and then drive the second roller (333) to rotate clockwise through the first roller (332), and drive the rotating rod (334) to rotate through the transmission of the first worm (3331) and the first worm gear (3341), and then drive the fan blade (21) to rotate and close through the second worm (3342) and the second worm gear (23); S4. After the baffle (311) rotates and opens, the high-temperature and high-pressure expansion gas enters the cavity (341) through the pressure relief channel (12) for pressure relief, and blows the spiral blade (3423) to drive the outer tube (3422) to rotate. When the pores (3424) on the outer tube (3422) and the inner tube (3421) are aligned, the inert gas in the gas chamber (4) will enter the cavity (341) to cool down the expansion gas.

Images