Electric shock protection method and device for electric power TN system

Abstract

The invention discloses an electric shock protection method and device for an electric TN system, and relates to the field of electrical protection, the electric shock protection device comprises installation grooves formed in the two sides of the lower end of a cover plate and used for fixing an air bag, and one-way valve nozzles communicating with the air bag are fixed to the positions, corresponding to the installation grooves, of the upper end of the cover plate in a penetrating mode; upper sealing strips which abut against the outer half shell in a sealing mode are embedded in the positions, close to side lines, of the two sides of the upper end of the cover plate, and the air bag expands to push the cover plate to longitudinally move so that the upper sealing strips abut against the side walls of the outer half shell; the sealing assembly is used for sealing the periphery of the PE mother board and dividing the PE mother board into a plurality of blocks, and meanwhile the interior of the outer half shell is divided into a plurality of independent sealing spaces. By arranging the sealing assemblies, the interior of the outer half shell can be divided into a plurality of independent spaces, even if one space is corroded due to water leakage, other spaces cannot be affected, then the protection effect of the PE mother board is improved, and meanwhile the situation that the PE mother board is corroded, so that resistance is increased, and the safety protection performance is affected is avoided.

Description

Technical Field

[0001] The present application relates to the field of electrical protection, and in particular to a method and device for electric shock protection of an electric power TN system. Background Art

[0002] The electric shock protection method and device of the power TN system are a series of safety measures and related equipment used for the TN distribution system (a distribution system that directly grounds one point at the power supply end and connects the exposed conductive parts of the electrical device to this grounding point through a protective neutral conductor or a protective conductor). The power supply end of the TN distribution system, such as the neutral point or the middle point of the distribution transformer, must be directly grounded, and the exposed conductive parts of the electrical device must be connected to the total grounding terminal of the device through a protective neutral conductor PEN or a protective conductor PE, and the total grounding terminal is then connected to the grounding point of the power supply end of the distribution system through PEN or PE. If there are suitable grounding points in the surrounding area, the PEN or PE conductor should be grounded at as many points as possible; when entering any building, the PEN or PE conductor should be repeatedly grounded, and a total grounding terminal should be set in the distribution room (at the power supply line of the building), and the metal parts of non-electrical devices that enter each building and are easily introduced into dangerous potentials should be connected to the total grounding terminal with a protective equipotential bonding conductor.

[0003] The PE motherboards installed in the current distribution room are all set to be exposed. Water entering the distribution room floor will come into contact with the PE motherboard and cause corrosion. If an electrical fault or leakage occurs inside the distribution room, since water is conductive, the area around the PE motherboard and the distribution room will be electrified through the water source. High humidity inside the distribution room will also cause corrosion to the PE motherboard, resulting in increased resistance and reduced protection effect. Summary of the invention

[0004] In order to improve the problem of poor electric shock protection effect of the power TN system due to the exposure of the PE motherboard without protection, the present application provides an electric shock protection method and device for the power TN system.

[0005] The present application provides a method and device for electric shock protection of a power TN system using the following technical solutions: An electric shock protection method for a power TN system, comprising the following electric shock protection methods: S01. First, insert a single PE motherboard into the interior of a single or multiple outer half shells, and make the PE motherboard located in the rectangular opening formed by two horizontal sealing strips and two vertical sealing strips; S02. When the PE motherboard has a bend, the bending sleeve needs to be put on the PE motherboard so that the two ends of the bending sleeve can be fixed and sealed with the two ends of the outer half shell. By increasing the number of outer half shells and the number of bending sleeves, the exposed PE motherboard inside the power distribution room can be covered and protected; S03, the cover plate is inserted into the outer half shell and the airbag is inflated, the two horizontal plates are brought close to each other and the two horizontal sealing strips are brought into contact with the upper and lower end surfaces of the PE motherboard to deform and seal, the two vertical plates are brought close to each other and the two vertical sealing strips are brought into contact with the left and right end surfaces of the PE motherboard to deform and seal, forming a sealed end, so that the interior of the outer half shell is divided into a plurality of sealed chambers, and the PE motherboard is further divided into a plurality of sections; S04, then put the end caps on both ends of the PE motherboard and fix them to one end of the outer half shell, and at the same time fill the gap between the end caps and the PE motherboard through the sealing ring, so that several outer half shells and bent sleeves are spliced ​​and then sealed by the end caps to realize complete sealing protection of the entire PE motherboard.

[0006] A device for electric shock protection of a power TN system, applied to the above-mentioned electric shock protection method of a power TN system, comprising mounting grooves for fixing airbags on both sides of the lower end of a cover plate, a one-way valve nozzle connected to the airbag is fixed through the upper end of the cover plate corresponding to the mounting groove, and upper sealing strips for abutting and sealing with the outer half shell are embedded at positions near the edge lines on both sides of the upper end of the cover plate, and the expansion of the airbag pushes the cover plate to move longitudinally so that the upper sealing strip is tightly abutted with the side wall of the outer half shell; The sealing assembly is used to seal the periphery of the PE motherboard and divide the PE motherboard into multiple pieces, while dividing the interior of the outer half shell into multiple independent sealed spaces.

[0007] By adopting the above technical solution, several outer half shells are connected end to end and fixed with bent sleeves, so that the busbar can be sleeved to achieve sealing protection, and the interior of the outer half shell can be divided into multiple independent spaces by setting the sealing component. Even if one space leaks and corrodes, it will not affect other spaces, thereby increasing the protection effect of the PE motherboard. When the PE motherboard is energized, the outer half shell is isolated from the cover plate, so no leakage will occur to cause personal injury. Therefore, when the water inside the distribution room overflows the PE motherboard, it is safe. At the same time, it also avoids the corrosion of the PE motherboard, which leads to increased resistance and affects the safety protection.

[0008] Preferably, both sides of the upper end of the inner wall of the outer half shell are provided with transverse slots for the cover plate to be movably inserted, the middle part of the lower end of the transverse slot is provided with an expansion slot for the airbag to expand into, and both sides of the inner wall of the outer half shell are symmetrically provided with L-shaped slots connected to the expansion slot and the transverse slot.

[0009] By adopting the above technical solution, the expansion of the airbag can push the cover plate to move to increase the sealing effect. At the same time, the provided expansion groove also plays a guiding and fixing role, so that the airbag can push the top block to move.

[0010] Preferably, the sealing assembly includes a top block movably arranged inside the L-shaped groove and adapted to the airbag, a rotating shaft is fixedly provided on the inner wall at the bend of the L-shaped groove, a Z-shaped plate movably sleeved in the middle of the rotating shaft and abutting against the lower end of the top block, a connecting rod is hinged at the lower end of the Z-shaped plate, one end of the connecting rod is hinged to a fixed plate sliding in the L-shaped groove, a longitudinal cover is fixed at the opening on the upper side of the L-shaped groove, the Z-shaped plate is in an inclined state under normal circumstances, a limiting groove is provided on one side of the top block, and a raised portion on one side of the longitudinal cover is slidably arranged in the limiting groove and limited.

[0011] By adopting the above technical solution, the vertical force of the top block is converted into horizontal force through the rotation of the Z-shaped plate and the action of the connecting rod, thereby driving the rectangular frame to move, providing driving force for the movement of the two horizontal plates and the two vertical plates.

[0012] Preferably, a rectangular frame sliding on the inner wall of the outer half shell is fixed to one side of the two fixing plates, and a wedge-shaped block is fixed to the middle of the four sides of the rectangular frame away from the top block.

[0013] By adopting the above technical solution, the rectangular frame can achieve the effect of sealing while also enabling the four wedge-shaped blocks to move synchronously.

[0014] Preferably, first grooves are provided on both sides of the lower end of the inner wall of the outer half shell for the sliding and limiting of an abutment plate located below, one end of the two abutment plates are fixed to the two ends of the cross plate, and the opposite surfaces of the two cross plates are fixed with cross sealing strips of different longitudinal lengths, and the opposite sides of the two cross plates are in abutment with the inclined surface of the wedge block.

[0015] By adopting the above technical solution, the first groove has the effect of guiding the abutment plate to a limit position, and at the same time enables the transverse plate to move to a maximum distance, and the deformation of the transverse sealing strip can achieve sealing.

[0016] Preferably, second grooves for sliding and limiting the abutment plate 1 located above are provided on both sides of the upper end of the inner wall of the outer half shell, and the two abutment plates 1 located above are different in length from the two abutment plates 1 located below.

[0017] By adopting the above technical solution, the second groove can guide and limit the abutment plate 1, and at the same time, the different lengths of the upper abutment plate 1 and the two lower abutment plates 1 can make the distance between the transverse sealing strip and the PE motherboard the same.

[0018] Preferably, third grooves for sliding and limiting the two abutment plates are provided on both sides of the bottom of the outer half shell, and longitudinal plates abutting against the transverse plate and the transverse sealing strip are fixed on one side of the upper end of the two abutment plates, and longitudinal sealing strips in contact with the transverse plate and the transverse sealing strip are fixed on the opposite side of the two longitudinal plates.

[0019] By adopting the above technical solution, the third groove realizes the guiding and limiting function for the abutment plate 2, and the transverse sealing strip and the longitudinal sealing strip are deformed and sealed to each other.

[0020] Preferably, a T-slot 2 is provided on one side of the two longitudinal plates facing the transverse plate, a T-slot 1 with the same structural dimensions as the T-slot 2 is provided on one side of the two transverse plates facing the longitudinal plate, a notch connected to the T-slot 1 is provided on the middle side of the T-slot 1, and I-shaped pieces are slidably provided at both ends of the T-slot 1, the other end of the I-shaped piece is movably inserted into the interior of the T-slot 2, and the I-shaped piece is removed from the notch.

[0021] By adopting the above technical solution, the setting of the notch facilitates the installation and disassembly of the I-shaped parts. At the same time, the I-shaped parts can move inside T-slot 1 and T-slot 2 as the horizontal plate or the vertical plate moves, thereby improving the stability of the vertical plate. The surfaces of T-slot 1 and T-slot 2 and the I-shaped parts are all set to smooth surfaces.

[0022] Preferably, the two longitudinal plates are fixed with a corrugated flexible sheet at one end away from the wedge block, which is fixed to the inner wall of the outer half shell and used for sealing. The two transverse plates are also fixed with a corrugated flexible sheet at one end away from the wedge block. The corrugated flexible sheet on the lower transverse plate is fixed to the bottom of the outer half shell, and one end of the corrugated flexible sheet on the upper transverse plate abuts against the surface of the cover plate and is sealed.

[0023] By adopting the above technical solution, the corrugated flexible sheet can be stretched as the transverse plate or the longitudinal plate moves, while ensuring sealing.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. Use sealing components to divide the interior of the outer half shell into several sealed cavities, thereby achieving multiple waterproof properties without affecting each other, which can effectively increase the waterproof performance and corrosion resistance of the PE motherboard. Even if one space leaks and corrodes, it will not affect other spaces, thereby increasing the protection effect of the PE motherboard. At the same time, it also avoids the corrosion of the PE motherboard, which leads to an increase in resistance and affects safety protection; 2. The airbag can improve the sealing between the cover plate and the outer half shell. At the same time, the PE motherboard can be divided into multiple sections, which are independent of each other, thereby improving the corrosion resistance of the PE motherboard and increasing the electric shock protection capability of the TN system, ensuring safety even in a humid distribution room. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the overall splicing of this application; Figure 2 This is a schematic cross-sectional view of the outer half shell of the present application; Figure 3 This is a schematic diagram of the separation of the outer half shell and the cover plate of the present application; Figure 4 This is a schematic diagram of the connection between the top block, Z-shaped plate, rotating shaft and connecting rod of the present application; Figure 5 This is a schematic diagram of the positions of the rectangular frame, wedge-shaped block, horizontal plate and horizontal sealing strip of the present application; Figure 6 Schematic diagram of the positions of the outer half shell, the L-shaped groove, the first groove and the third groove of the present application Figure 7 This is a cross-sectional connection diagram of the horizontal plate, I-shaped member and longitudinal plate of this application Figure 8 Schematic diagram of the exploded axial side of the horizontal plate, I-shaped parts and longitudinal plate of this application Fig. 9 A schematic diagram of the positions of the horizontal plate, notch and T-slot of this application Fig.10 This is a schematic diagram of the connection between the outer half shell and the end cover of the present application.

[0026] Reference numerals: 100, outer half shell; 101, cover plate; 102, upper sealing strip; 103, one-way valve nozzle; 104, transverse slot; 105, expansion slot; 106, longitudinal cover; 107, L-shaped slot; 108, first slot; 109, airbag; 110, mounting slot; 111, second slot; 112, third slot; 200, PE motherboard; 300, bent sleeve; 400, notch; 401, horizontal plate; 402, horizontal sealing strip; 403, rectangular frame; 404, I-shaped part; 405, T-shaped groove 1; 406, top block; 407, wedge block; 408, longitudinal sealing strip; 409, longitudinal plate; 410, limit groove; 411, Z-shaped plate; 412, rotating shaft; 413, connecting rod; 414, fixed plate; 415, corrugated flexible sheet; 416, abutment plate 1; 417, abutment plate 2; 418, T-slot 2; 500, end cap; 600. Sealing ring. DETAILED DESCRIPTION

[0027] The following is combined with Figure 1-Figure 10 This application is described in further detail.

[0028] The embodiments of the present application disclose a method and a device for protecting against electric shock in a power TN system.

[0029] Reference Figure 1-Figure 4A device for electric shock protection of a TN power system, comprising strip-shaped mounting grooves 110 provided on both sides of the lower end of a cover plate 101, the mounting grooves 110 being used to fix an airbag 109, the airbag 109 being located inside the mounting grooves 110 under normal conditions, a one-way valve nozzle 103 being fixed through a position corresponding to the mounting grooves 110 at the upper end of the cover plate 101, the outlet end of the one-way valve nozzle 103 being fixed and connected to the inlet end of the airbag 109, and the upper end surface of the one-way valve nozzle 103 being connected to the upper end surface of the cover plate 101 The upper sealing strip 102 is embedded in the upper end of the cover plate 101 near the edge line. The upper end of the upper sealing strip 102 protrudes from the upper end surface of the cover plate 101 and abuts against the outer half shell 100 to achieve sealing. The expansion of the airbag 109 pushes the cover plate 101 to move longitudinally so that the upper sealing strip 102 abuts against the side wall of the outer half shell 100, thereby filling the gap between the upper and lower ends of the cover plate 101 and the transverse slot 104 to achieve sealing and prevent moisture and water from entering the outer half shell 100.

[0030] After the installer inserts the PE motherboard 200 into the outer half shell 100, the installer inserts the cover plate 101 into the transverse slot 104. After the insertion is completed, the installer connects the air outlet of the inflation device to the one-way valve nozzle 103 through an inflation device, which is similar to a balloon blowing device or an air pump. Then, the gas is injected into the airbag 109 through the one-way valve nozzle 103 to expand the airbag 109 and deform the airbag 109 to fill the expansion groove 105. At the same time, the cover plate 101 is pushed to move under the reaction, and then the upper sealing strip 102 is pushed to achieve the sealing and fixation between the cover plate 101 and the outer half shell 100. At the same time, the expansion of the airbag 109 also achieves a sealing effect, so that the cover plate 101 and the inside of the outer half shell 100 form a sealed cavity, which effectively prevents water vapor or water from entering, and prevents the PE motherboard 200 from being corroded and causing an increase in resistance, thereby improving the safety of power connection protection.

[0031] Reference Figure 1-Figure 6The sealing component is used to seal the periphery of the PE motherboard 200 and divide the PE motherboard 200 into multiple pieces, and at the same time divide the interior of the outer half shell 100 into multiple independent sealed spaces, each of which has an independent sealing effect. Even if water enters a closed space, it will not affect other positions of the PE motherboard 200, thereby reducing the corrosion of the PE motherboard 200. The sealing component includes a top block 406 that is movably set inside the L-shaped groove 107. The top block 406 is adapted to the airbag 109, so the top of the top block 406 is set to a smooth surface to reduce contact with the airbag The wear of the capsule 109, the inner wall of the bending part of the L-shaped groove 107 is fixed to one end of the rotating shaft 412, and the other end of the rotating shaft 412 does not protrude from the L-shaped groove 107, and a Z-shaped plate 411 is movably sleeved in the middle of the rotating shaft 412, the upper end of the Z-shaped plate 411 abuts against the lower end of the top block 406, and the lower end of the Z-shaped plate 411 is hinged to one end of the connecting rod 413, and a fixing plate 414 is hinged to one end of the connecting rod 413, and the fixing plate 414 slides laterally in the L-shaped groove 107, and a longitudinal cover 106 is fixed to the opening on the upper side of the L-shaped groove 107, and the longitudinal cover 106 is provided The Z-shaped plate 411 is in an inclined state under normal conditions, and the inclination angle is set at 1-4 degrees. A limiting groove 410 is provided on one side of the top block 406, and the length of the limiting groove 410 is much greater than the length of the protrusion. A protrusion (not shown in the figure) is fixed on the side opposite to the limiting groove 410 of the longitudinal cover 106. The protrusion on one side of the longitudinal cover 106 is slidably set in the limiting groove 410 and is limited. When the protrusion is located at the inner upper end of the limiting groove 410 and abuts against it, it indicates that the top block 406 has fallen to the lowest point. When the distance is large and the raised portion is located at the inner lower end of the limiting groove 410, on the contrary, under normal conditions, the upper end of the top block 406 is located in the middle of the longitudinal depth of the expansion groove 105, and one side of the two fixing plates 414 is commonly fixed with a rectangular frame 403 that slides on the inner wall of the outer half shell 100, and three sides of the rectangular frame 403 are in contact with the interior of the outer half shell 100 or the other side of the rectangular frame 403 is in contact with the surface of the cover plate 101, and a wedge block 407 is fixed in the middle of the four sides of the rectangular frame 403 away from the top block 406, and one end of the wedge block 407 is provided with an inclined surface.

[0032] When the airbag 109 expands to the inside of the expansion slot 105, it pushes the top block 406 to move, and the top block 406 pushes the Z-shaped plate 411 to rotate around the rotating shaft 412. At the same time, one end of the Z-shaped plate 411 slides at the lower end of the top block 406. Under the action of the lever principle, the other end of the Z-shaped plate 411 pushes the connecting rod 413 to move and then drives the rectangular frame 403 to move inside the outer half shell 100 through the fixed plate 414. The rectangular frame 403 drives the four wedge blocks 407 to move synchronously, and the longitudinal cover 106 can limit the top block 406 to prevent it from falling. Reference Figure 3-Figure 6, both sides of the upper end of the inner wall of the outer half shell 100 are provided with transverse slots 104, the cover plate 101 is movably inserted in the transverse slots 104, an expansion slot 105 is provided in the middle of the lower end of the transverse slot 104, the expansion slot 105 is for the air bag 109 to expand into, and both sides of the upper end of the expansion slot 105 are set to be chamfered, and both sides of the inner wall of the outer half shell 100 are symmetrically provided with L-shaped slots 107 connected with the expansion slot 105 and the transverse slot 104, and both sides of the lower end of the inner wall of the outer half shell 100 are provided with first slots 108, the inside of the first slot 108 slides and limits with the abutment plate 416 located below, the length of the first slot 108 is much greater than the length of the abutment plate 416, and the two abutment plates 416 are connected to each other. One end is fixed to the two ends of the side of the horizontal plate 401 away from the corrugated flexible sheet 415, and the lower end of the abutment plate 416 extends out of the horizontal plate 401, and the opposite surfaces of the two horizontal plates 401 are fixed with horizontal sealing strips 402 of different longitudinal lengths, and the opposite sides of the two horizontal plates 401 are abutted with the inclined surface of the wedge block 407 so that the horizontal plates 401 have a tendency to move toward each other, and second grooves 111 are provided on both sides of the upper end of the inner wall of the outer half shell 100, and the second groove 111 corresponds to the first groove 108, and an abutment plate 416 located above is slidably arranged inside the second groove 111 to realize limiting, and the two abutment plates 416 located above are of different lengths from the two abutment plates 416 located below.

[0033] When the airbag 109 expands, it will first expand into the expansion groove 105 and then expand to the blank space of the transverse slot 104, thereby increasing the sealing effect. The movement of the wedge block 407 will push the two transverse plates 401 to move toward each other and then drive the two transverse sealing strips 402 to move toward each other through the transverse plate 401, thereby making one end of the two transverse sealing strips 402 press against the surface of the PE motherboard 200 and deform. The transverse sealing strips 402 and the transverse plates 401 also move on the surfaces of the longitudinal plates 409 and the longitudinal sealing strips 408. When the two transverse plates 401 move, they will respectively drive the abutment plate 416 to move inside the first groove 108 and the second groove 111, thereby realizing the role of guiding and limiting.

[0034] Reference Figure 5-Figure 7 A third groove 112 is provided on both sides of the bottom of the outer half shell 100, and a second abutment plate 417 is slidably arranged in the third groove 112 to realize mutual limitation. A longitudinal plate 409 abutting against the transverse plate 401 and the transverse sealing strip 402 is fixed on one side of the upper end of the two abutment plates 417, and one end of the longitudinal plate 409 away from the longitudinal sealing strip 408 protrudes from the longitudinal plate 409, and a longitudinal sealing strip 408 in contact with the transverse plate 401 and the transverse sealing strip 402 is fixed on the opposite side of the two longitudinal plates 409, and the transverse sealing strip 402 and the longitudinal sealing strip 408 are made of the same material as the longitudinal sealing strip 408, which is an insulating silicone material.

[0035] The inclined surface of the wedge block 407 pushes the two longitudinal plates 409 to move toward each other, and then drives the longitudinal sealing strip 408 to move toward each other through the longitudinal plate 409 and abut against the side of the PE mother plate 200 and deform to achieve sealing. The deformation of the longitudinal sealing strip 408 and the transverse sealing strip 402 can fill the gap between the transverse plate 401 and the longitudinal plate 409 to achieve a sealing effect.

[0036] Reference Figure 8 , Fig. 9 A T-slot 418 is provided in the middle of the two longitudinal plates 409 on the side facing the transverse plate 401, and one end of the T-slot 418 can be provided as a through slot to facilitate the insertion of the I-shaped piece 404. A T-slot 1 405 is provided on the side facing the longitudinal plate 409 of the two transverse plates 401. The partial structure of the T-slot 1 405 is the same as the structural size of the T-slot 2 418. A notch 400 connected to the T-slot 1 405 is provided on the side of the middle part of the T-slot 1 405, and the diameter of the notch 400 is larger than the diameter of the I-shaped piece 404. Both ends of the T-slot 1 405 are movably connected to one end of the I-shaped piece 404, and the other end of the I-shaped piece 404 is movably inserted into the inside of the T-slot 2 418, and the I-shaped piece 404 is installed and removed from the notch 400. The setting of the I-shaped piece 404 can keep the longitudinal plate 409 vertical to prevent it from tipping over.

[0037] When the two longitudinal plates 409 move, one end of the I-shaped piece 404 moves in the T-slot 1 405 . When the two transverse plates 401 move, one end of the I-shaped piece 404 moves in the T-slot 2 418 , making the two longitudinal plates 409 and the two transverse plates 401 more stable when moving.

[0038] Reference Figure 8 , Fig. 9 The two longitudinal plates 409 are fixed with a corrugated flexible sheet 415 fixed to the inner wall of the outer half shell 100 at one end away from the wedge block 407. The corrugated flexible sheet 415 is used for sealing and can be stretched or compressed. The corrugated flexible sheet 415 is preferably made of insulating silicone material. The two transverse plates 401 are also fixed with a corrugated flexible sheet 415 at one end away from the wedge block 407. Both ends of the four corrugated flexible sheets 415 can be connected to each other to achieve isolation and sealing. The corrugated flexible sheet 415 on the lower transverse plate 401 is fixed to the bottom of the outer half shell 100, and one end of the corrugated flexible sheet 415 on the upper transverse plate 401 abuts against and seals the surface of the cover plate 101.

[0039] The provision of the corrugated flexible sheet 415 can seal the distance between the longitudinal plate 409, the transverse plate 401 and the inner wall of the outer half shell 100. It should be noted that the end face of the corrugated flexible sheet 415 located at the opening of the outer half shell 100 protrudes from the bottom of the inner cavity of the transverse slot 104, so that when the cover plate 101 is inserted into the interior of the outer half shell 100, it can abut against the corrugated flexible sheet 415 and deform the corrugated flexible sheet 415 to increase the sealing performance.

[0040] When the PE motherboards 200 are spliced ​​together, there will be a step shape. Therefore, in order to enable multiple outer half shells 100 to be spliced ​​and fixed to each other by bolts, and at the same time ensure that the horizontal sealing strip 402 and the vertical sealing strip 408 can contact the surface of the PE motherboard 200 to achieve sealing, it is necessary to rotate the outer half shell 100 in the step shape by 180 degrees to achieve installation. At the same time, a single outer half shell 100 can be set to several sizes such as 50cm, 1m, etc., which can be set according to actual needs. At least one sealing component is set inside a single outer half shell 100.

[0041] The implementation principle of an electric shock protection method and device for an electric power TN system in an embodiment of the present application is as follows: before connecting several PE motherboards 200, first insert the PE motherboard 200 into the rectangular space formed by two horizontal sealing strips 402 and two vertical sealing strips 408, and then fix the several PE motherboards 200 by bolts, pull the outer half shell 100 and adjust it to a suitable position, and if encountering a bent PE motherboard 200, the bent sleeve 300 can be installed, and then the bent sleeve 300 and the flanges of the two outer half shells 100 can be fixed by bolts. It should be noted that the outer half shell 100 is fixed to a position in the distribution room or through the wall of the distribution room, which can just save the need to reserve a protective pipe in the wall of the distribution room.

[0042] Afterwards, the installer inserts the cover plate 101 into the transverse slot 104. It should be noted that the one-way valve mouth 103 needs to be exposed first, and when the inflation tool is used to inflate the airbag 109, the airbag 109 will push the top block 406 to move, and the top block 406 will push the rectangular frame 403 through the Z-shaped plate 411, the connecting rod 413 and the fixed plate 414 to drive the four wedge blocks 407 to move synchronously. The four wedge blocks 407 respectively push the transverse plate 401 and the longitudinal plate 409 to move, thereby driving the longitudinal sealing strip 408 to move and the transverse sealing strip 402 to move, thereby achieving mutual abutment and sealing. When the transverse plate 401 and the longitudinal plate 409 move, the corrugated flexible sheet 415 will be stretched and deformed, thereby forming a sealed space between the two sealing components.

[0043] Then, the remaining part of the cover plate 101 is forcefully inserted into the transverse slot 104 or the protruding part of the cover plate 101 is inserted into the transverse slot 104 of the other outer half shell 100. However, it should be noted that since the cover plate 101 protrudes for a certain length, there are two ways to set the length of the cover plate 101. First, the length of a single cover plate 101 is longer than the length of the other cover plates 101; second, a cover plate 101 is inserted into the transverse slot 104 of the outer half shell 100 at the end by the length of the protruding cover plate 101, and then the cover plate 101 is normally inserted to seal the empty position and seal the connection at the same time. Then, the two outer half shells 100 at the end are sealed and fixed by the end covers 500.

[0044] Reference Figure 1-Figure 10 , an electric shock protection method for a power TN system, comprising the following electric shock protection methods: S01. First, insert a single PE motherboard 200 into the interior of a single or multiple outer half shells 100, and make the PE motherboard 200 be located in the rectangular opening formed by two horizontal sealing strips 402 and two vertical sealing strips 408. After completion, install multiple PE motherboards 200.

[0045] S02. When the PE motherboard 200 has a bend, the bending sleeve 300 needs to be inserted into the PE motherboard 200 and the two ends of the bending sleeve 300 can be fixed and sealed with the two ends of the outer half shell 100 by bolts. The outer half shell 100 is connected end to end and the connection is sealed. By increasing the number of outer half shells 100 and the number of bending sleeves 300, the exposed PE motherboard 200 inside the distribution room can be covered and protected.

[0046] S03. After the cover plate 101 is inserted into the outer half shell 100, the one-way valve nozzle 103 is left outside and the airbag 109 is inflated, so that the two horizontal plates 401 are close to each other and the two horizontal sealing strips 402 are in contact with the upper and lower end surfaces of the PE motherboard 200 to deform and seal, and the two vertical plates 409 are close to each other and the two vertical sealing strips 408 are in contact with the left and right end surfaces of the PE motherboard 200 to deform and seal. This sealing method is a staggered structural sealing to form a sealing end, which divides the interior of the outer half shell 100 into several sealed chambers, and then divides the PE motherboard 200 into several sections.

[0047] S04. The end caps 500 are then mounted on both ends of the PE motherboard 200. The end caps 500 are fixed to one end of the outer half shell 100. At the same time, the gap between the end caps 500 and the PE motherboard 200 is filled and sealed by the sealing ring 600. Several outer half shells 100 and the bent sleeves 300 are spliced ​​and then sealed by the end caps 500 to achieve complete sealing protection of the entire PE motherboard 200, thereby increasing the protective performance of the PE motherboard 200.

[0048] The above are only optional embodiments of the present disclosure and are not intended to limit the present disclosure. For those skilled in the art, the present disclosure may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A method for protecting against electric shock in a power TN system, characterized in that: The following methods of protection against electric shock are included: S01, first inserting a single PE motherboard (200) into a single or multiple outer half shells (100), and making the PE motherboard (200) be located in a rectangular opening formed by two horizontal sealing strips (402) and two vertical sealing strips (408); S02, when the PE motherboard (200) has a bend, a bending sleeve (300) needs to be inserted into the PE motherboard (200) so that the two ends of the bending sleeve (300) can be fixed and sealed with the two ends of the outer half shell (100), and by increasing the number of outer half shells (100) and the number of bending sleeves (300), the exposed PE motherboard (200) inside the power distribution room can be covered and protected; S03, the cover plate (101) is inserted into the outer half shell (100) and the airbag (109) is inflated, the two horizontal plates (401) are brought close to each other and the two horizontal sealing strips (402) are brought into contact with the upper and lower end surfaces of the PE motherboard (200) to deform and seal, the two vertical plates (409) are brought close to each other and the two vertical sealing strips (408) are brought into contact with the left and right end surfaces of the PE motherboard (200) to deform and seal, forming a sealed end, so that the interior of the outer half shell (100) is divided into a plurality of sealed chambers, and the PE motherboard (200) is further divided into a plurality of sections; S04, the end caps (500) are then sleeved on both ends of the PE motherboard (200) and fixed to one end of the outer half shell (100), and at the same time, the gap between the end caps (500) and the PE motherboard (200) is filled by the sealing ring (600), so that a plurality of outer half shells (100) and the bent sleeves (300) are spliced ​​and then sealed by the end caps (500) to realize complete sealing protection of the entire PE motherboard (200).

2. A device for electric shock protection of a power TN system, applied to the electric shock protection method of a power TN system according to claim 1, characterized in that: It comprises mounting grooves (110) for fixing the airbag (109) on both sides of the lower end of the cover plate (101); a one-way valve nozzle (103) communicating with the airbag (109) is fixed through the upper end of the cover plate (101) at positions corresponding to the mounting grooves (110); upper sealing strips (102) for abutting and sealing with the outer half shell (100) are embedded at positions near the edge lines on both sides of the upper end of the cover plate (101); the airbag (109) expands to push the cover plate (101) to move longitudinally so that the upper sealing strip (102) is tightly abutted with the side wall of the outer half shell (100); The sealing assembly is used to seal the periphery of the PE motherboard (200) and to divide the PE motherboard (200) into a plurality of pieces, while dividing the interior of the outer half shell (100) into a plurality of independent sealed spaces.

3. The device for electric shock protection of a power TN system according to claim 2, characterized in that: Both sides of the upper end of the inner wall of the outer half shell (100) are provided with transverse slots (104) for the cover plate (101) to be movably inserted therein, and an expansion slot (105) for the air bag (109) to expand into is provided in the middle of the lower end of the transverse slot (104), and L-shaped slots (107) communicating with the expansion slots (105) and the transverse slot (104) are symmetrically provided on both sides of the inner wall of the outer half shell (100).

4. The device for electric shock protection of a power TN system according to claim 3, characterized in that: The sealing assembly comprises a top block (406) movably arranged inside the L-shaped groove (107) and adapted to the airbag (109); a rotating shaft (412) is fixedly arranged on the inner wall of the bending part of the L-shaped groove (107); a Z-shaped plate (411) is movably sleeved on the middle part of the rotating shaft (412) and abuts against the lower end of the top block (406); a connecting rod (413) is hingedly connected to the lower end of the Z-shaped plate (411); one end of the connecting rod (413) is hingedly connected to a fixing plate (414) that slides in the L-shaped groove (107); a longitudinal sealing cover (106) is fixed at the opening on the upper side of the L-shaped groove (107); the Z-shaped plate (411) is in an inclined state under normal conditions; a limiting groove (410) is provided on one side of the top block (406); a raised portion on one side of the longitudinal sealing cover (106) is slidably arranged in the limiting groove (410) and is limited.

5. The device for electric shock protection of a power TN system according to claim 4, characterized in that: A rectangular frame (403) sliding on the inner wall of the outer half shell (100) is fixed to one side of the two fixing plates (414), and a wedge-shaped block (407) is fixed to the middle of the four sides of the rectangular frame (403) away from the top block (406).

6. The device for electric shock protection of a power TN system according to claim 5, characterized in that: Both sides of the lower end of the inner wall of the outer half shell (100) are provided with first grooves (108) for sliding and limiting the abutment plate (416) located below. One end of each of the two abutment plates (416) is fixed to the two ends of the transverse plate (401). The opposite surfaces of the two transverse plates (401) are fixed with transverse sealing strips (402) of different longitudinal lengths. The opposite sides of the two transverse plates (401) are in contact with the inclined surface of the wedge block (407).

7. The device for electric shock protection of a power TN system according to claim 6, characterized in that: Second grooves (111) are provided on both sides of the upper end of the inner wall of the outer half shell (100) for sliding and limiting the abutment plate 1 (416) located above, and the two abutment plates 1 (416) located above and the two abutment plates 1 (416) located below have different lengths.

8. The device for electric shock protection of a power TN system according to claim 7, characterized in that: The outer half shell (100) has third grooves (112) on both sides of the bottom for the second abutment plate (417) to slide and limit, and the upper ends of the two second abutment plates (417) are fixed with longitudinal plates (409) that abut against the transverse plate (401) and the transverse sealing strip (402), and the opposite sides of the two longitudinal plates (409) are fixed with longitudinal sealing strips (408) that contact the transverse plate (401) and the transverse sealing strip (402).

9. The device for electric shock protection of a power TN system according to claim 8, characterized in that: A second T-slot (418) is provided on one side of the two longitudinal plates (409) facing the transverse plate (401), and a first T-slot (405) having the same structural dimensions as the second T-slot (418) is provided on one side of the two transverse plates (401) facing the longitudinal plate (409). A notch (400) communicating with the first T-slot (405) is provided on a side edge of the middle portion of the first T-slot (405), and both ends of the first T-slot (405) are slidably provided with an I-shaped piece (404), the other end of the I-shaped piece (404) being movably inserted into the second T-slot (418), and the I-shaped piece (404) is detachable from the notch (400).

10. The electric shock protection device for a power TN system according to claim 9, characterized in that: The ends of the two longitudinal plates (409) away from the wedge block (407) are fixed with a corrugated flexible sheet (415) fixed to the inner wall of the outer half shell (100) and used for sealing. The ends of the two transverse plates (401) away from the wedge block (407) are also fixed with a corrugated flexible sheet (415). The corrugated flexible sheet (415) on the lower transverse plate (401) is fixed to the bottom of the outer half shell (100), and one end of the corrugated flexible sheet (415) on the upper transverse plate (401) is in contact with the surface of the cover plate (101) and sealed.

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