CN114389225B - Emergency power-off power distribution cabinet for preventing line from being self-burning - Google Patents

Abstract

The invention discloses an emergency power-off power distribution cabinet for preventing line self-combustion, which comprises a bus voltage division mechanism, a cable flame-retardant mechanism and a cable switching mechanism, wherein the bus voltage division mechanism is arranged on a manufactured base on a telegraph pole, a case arranged outside the manufactured base, an outer frame connected to the outer side of the case and a base arranged inside the case. Through setting up the base of making that can install on the wire pole, and make chassis, base, knife switch and the reposition of redundant personnel subassembly that the externally mounted of base can carry out the switching to the wire cable, and utilize normal electric power to electrically conductive piece, spool, safe spool and electromagnetic part, combine the traction of electromagnetic part to the traction wire, and combine the tightening up of traction wire to the cutting assembly, thereby can make the device carry out quick fire-retardant cutting to the wire cable that takes place spontaneous combustion on the remote area wire pole to erect, in order to avoid taking place the cable of short circuit and appearing spontaneous combustion problem can continue influencing the cable of other normal positions under the pollution condition.

Description

Emergency power-off power distribution cabinet for preventing line from being self-burning

Technical Field

The invention relates to the technical field of circuit protection, in particular to an emergency power-off power distribution cabinet for preventing circuit self-burning.

Background

The insulating layer of the wire and the cable is composed of various combustible substances such as paper, oil, hemp, rubber, plastics, asphalt and the like, when the wire and the cable are erected in a suspended manner or are exposed to the external environment for a long time, the insulating layer on the wire and the cable is easily corroded by various factors in the external environment, and the problem of unexpected short circuit spontaneous combustion can often occur to the wires erected by the telegraph pole used for remote power supply.

When the remote power supply is carried out, once the insulating layer of the wire and the cable is oxidized and corroded or high load is generated to cause a large amount of discharge of the cable, the local short circuit spontaneous combustion of the remote wire and the cable is easily caused, the remote area where the remote wire and the cable are erected is sparse, and once the wire and the cable are spontaneous, the fire condition of effectively controlling the spontaneous combustion of the cable is difficult to obtain.

According to the above description, the problem that the local short circuit spontaneous combustion of the wires and cables in the remote area cannot be controlled is solved, which is the technical difficulty to be solved by the invention.

Disclosure of Invention

The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

The technical scheme adopted by the invention is as follows:

the utility model provides a prevention circuit is from emergent outage switch board for burning, includes busbar partial pressure mechanism, cable flame retardant system and cable changeover mechanism, the busbar partial pressure mechanism installs make the base on the wire pole, install make the chassis of base outside, connect the outer frame in the chassis outside, install chassis inside base, connect in the plug-in strip of chassis inner chamber both sides and connect in the external reposition of redundant personnel subassembly of plug-in strip, just the reposition of redundant personnel subassembly is including installing in the dustcoat of base inside, built-in the conductive piece of dustcoat inside, be located the spool of dustcoat inner chamber, connect electromagnetic component and movable mounting on the spool in spool and the safety wire post in conductive piece, install the cable flame retardant system on the busbar partial pressure mechanism, and cable flame retardant system includes and install make the support of base top, connect in the crossbeam of support both sides, movable mounting in auxiliary member and the setting element outside the crossbeam, built-in the haulage wire of support and crossbeam inner chamber, install in the cutting assembly outside the crossbeam and install the spacing piece outside the support, the cutting assembly includes that movable mounting is in the wire is in the inner wire of the inner side of the vacuum clamp bottom of the vacuum clamp is in the vacuum clamp bottom of the vacuum clamp is connected to the vacuum clamp bottom of the vacuum clamp The vacuum sleeve comprises a hanging insulator, a safety tube, an inner tube, a protective sleeve and a guide piece, wherein the hanging insulator is arranged in the vacuum sleeve, the safety tube is connected to the inner cavity of the hanging insulator, the inner tube and the protective sleeve are arranged at the top of the safety tube, and the guide piece is positioned on the inner side of a gasket close to one end of the vacuum sleeve.

Through adopting above-mentioned technical scheme, according to the length of the power cable between two poles of setting up, set up on every wire pole and make base, quick-witted case to utilize to make base to wholly apply holding power to support and crossbeam, utilize the crossbeam to apply horizontal sliding support to the cutting assembly of installing on the wire pole cable end, and combine the pull wire to receive the cable spontaneous combustion and lead to itself to apply the effort of cutting to the cable end to the cutting assembly, with this can make things convenient for the power cable to obtain safe cutting processing.

The present invention may be further configured in a preferred example to: the chassis and the manufactured base are formed by combining a steel-structure liner and a ceramic shell, and a rectangular notch which is adapted to an inner lead of the electromagnetic piece is formed in one side of the outer portion of the manufactured base.

Through adopting above-mentioned technical scheme, utilize the electric power cable between the adjacent wire pole to carry out the subregion and connect to utilize the directional control of generating line partial pressure mechanism that sets up on every wire pole to the cable in the individual region, in case the independent cable appears the short circuit on the wire pole and cause when spontaneous combustion, can carry out quick fire-retardant outage processing to spontaneous combustion position cable.

The present invention may be further configured in a preferred example to: the knife switch is formed by combining an insulating clamping plate, a conductive chip and a fastening nut.

Through adopting above-mentioned technical scheme, utilize and install the knife switch that can carry out transmission power to two cables of adjacent distribution in quick-witted case inner chamber's both sides to utilize the ability of wire chip in the knife switch to appear breaking off because of the short circuit, can effectively make things convenient for the quick outage of cable in the independent regional.

The present invention may be further configured in a preferred example to: one end of the conductive piece is provided with a circular ring-shaped pad piece, and the other end of the conductive piece is provided with an electric pile for clamping the conductive chip.

Through adopting above-mentioned technical scheme, utilize the setting to install the composite connection between the inside conductive part of dustcoat and spool and safety spool, can effectively make things convenient for the cable to lead to the repulsion of electromagnetic part to the traction wire bottom permanent magnet because of the short circuit outage, and then make things convenient for the outer end of traction wire to wholly apply outside thrust to the cutting assembly.

The present invention may be further configured in a preferred example to: the spool comprises annular conductive buckle and U-shaped conductive piece, and U-shaped conductive piece adaptation is connected in the electromagnetic part.

Through adopting above-mentioned technical scheme, utilize and offer the connection of U font conductive piece to the electromagnetic piece on the spool to this electromagnetic field's between electromagnetic piece and the traction wire control that can be convenient.

The present invention may be further configured in a preferred example to: the inside that support one end was kept away from to the crossbeam has been seted up cylindrical cross bore, the pull wire is the T font wholly, and the both ends of pull wire outwards extending adapt respectively and connect in the inner chamber of two crossbeams.

Through adopting above-mentioned technical scheme, utilize the support that sets up vertical state and two horizontal beam that extend to the constraint guide and the spacing of traction wire outer end, utilize the outer end of traction wire to the traction of ejector pin simultaneously to this can make clamp section of thick bamboo and array cutting head to the cutting treatment of burning layer structure on the cable end.

The present invention may be further configured in a preferred example to: the inside of loading part has seted up the cavity shrinkage pool, and the whole ceramic of loading part makes, the annular slotted hole of inwards sunk is seted up to the one end that the clamp section of thick bamboo kept away from the weight part, and annular slotted hole inner wall has seted up the recess that is adapted to the cutting head free rotation.

Through adopting above-mentioned technical scheme, utilize and make the heavy burden piece whole adoption pottery to inwards sunken annular slotted hole has been seted up to inside heavy burden piece, combines the inside annular slotted hole of heavy burden piece to isolate the cavity of cable end, with this can make independent from between the wire pole and appear the quick outage of spontaneous combustion cable.

The present invention may be further configured in a preferred example to: the bottom of the safety tube is provided with a groove which is adapted to the electric pile in the conductive piece, and a screw hole at the top of the safety tube is adapted to be connected with a conductive end head of an external power cable.

Through adopting above-mentioned technical scheme, utilize the setting can carry out the tight conductive terminal of adaptation clamp to the interior conductive chip of plug-in strip to combine the electric wire connection of conductive piece whole to the interior conductive chip of plug-in strip, so can make this mechanism to lead safely to the cable current.

The present invention may be further configured in a preferred example to: and a fastening clamping piece for clamping the hanging insulator is movably arranged in the vertical pipe at the bottom end of the vacuum sleeve.

Through adopting above-mentioned technical scheme, utilize the vacuum external member of connection in the setting element bottom to the holistic fixed stay of safety tube, hanging insulator and vacuum circuit breaker to combine a plurality of washers and fastener to the restraint assembly at vacuum circuit breaker both ends, with this can make the cable obtain safe fastening.

By adopting the technical scheme, the beneficial effects obtained by the invention are as follows:

1. according to the invention, as the electric wire and cable erected in remote areas are mostly suspended, and the erection devices used in different areas are different, for the electric wire and cable erected in remote areas, the electric wire and cable erected in remote areas can be quickly flame-retardant and cut off by arranging the manufactured base which can be arranged on the electric wire and cable, and the chassis, the base, the knife switch and the shunt assembly which can be used for switching the electric wire and cable are arranged outside the manufactured base, and normal electric power is utilized to draw the electric wire and cable by combining the electromagnetic member with the electromagnetic member and tighten the cutting assembly by combining the traction wire, so that the device can continuously influence the electric wire and cable in other normal positions under the pollution condition when the electric wire and cable which is in spontaneous combustion problem and has short circuit is avoided.

2. According to the invention, as the mechanism can cut and flame-retardant the cable at the short circuit part quickly when the electric cable on the telegraph pole has short circuit spontaneous combustion, and the cable is cut and flame-retardant quickly in order to prevent the spontaneous combustion part from being cut off conveniently, the constraint traction of the traction wire is realized by arranging the bracket with the slotted holes inside, the limit guiding of the elastic rod at the outer end of the traction wire is combined with the slotted holes in the transverse pipes at the two ends of the bracket, and the horizontal pressurizing pushing of the ejector rod, the vertical rod, the load bearing part, the clamping cylinder and the cutting head is combined with the limiting part, so that the annular distribution at one end of the cable close to the telegraph pole can be cut off quickly after spontaneous combustion occurs, and the annular distribution of the combustible part outside the cable is combined with the outward extension of the cutting head.

3. According to the invention, as shown above, in order to facilitate the effective flame-retardant cutting of the cable between two adjacent telegraph poles when the insulating layer is oxidized and short-circuited to cause spontaneous combustion, the cable is fastened and pulled by the inner barrel, the protective sleeve, the vacuum sleeve and the gaskets and the fastening pieces connected to the two ends of the vacuum circuit breaker through the hanging insulator and the safety tube which are erected on the telegraph poles and the safety tube, so that the device can fix the cable after an emergency accident occurs in the remotely erected electric cable, and can also improve the blocking of the current on the local line, thereby greatly facilitating the quick rush repair of maintenance personnel.

Drawings

FIG. 1 is a schematic diagram of one embodiment of the present invention;

FIG. 2 is a schematic side elevation view of an embodiment of the present invention;

FIG. 3 is a partially dispersed schematic illustration of FIG. 1 in accordance with an embodiment of the invention;

FIG. 4 is a schematic view illustrating the internal dispersion of FIG. 3 according to an embodiment of the present invention;

FIG. 5 is a schematic illustration of the dispersion of FIG. 1 and a partial cross-section thereof, in accordance with one embodiment of the present invention;

FIG. 6 is an internal dispersion diagram of FIG. 5 according to one embodiment of the present invention;

FIG. 7 is a partially dispersed schematic illustration of FIG. 6 in accordance with an embodiment of the invention;

FIG. 8 is a partially dispersed schematic illustration of FIG. 5 in accordance with an embodiment of the invention.

Reference numerals:

100. a bus voltage dividing mechanism; 110. a chassis; 120. manufacturing a base; 130. an outer frame; 140. a base; 150. a knife switch; 160. a shunt assembly; 161. an outer cover; 162. a conductive member; 163. a conduit; 164. an electromagnetic member; 165. a safety post;

200. a cable flame retardant mechanism; 210. a bracket; 220. a cross beam; 230. an auxiliary member; 240. a traction wire; 250. a cutting assembly; 251. a push rod; 252. a vertical rod; 253. a weight member; 254. a clamping cylinder; 255. a cutting head; 260. a limiting piece; 270. a positioning piece;

300. a cable switching mechanism; 310. a hanging insulator; 320. a safety tube; 330. an inner cylinder; 340. a protective sleeve; 350. a vacuum sleeve; 360. a guide; 370. a vacuum circuit breaker; 380. a gasket; 390. a fastener.

Description of the embodiments

The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be noted that, without conflict, the embodiments of the present invention and features in the embodiments may be combined with each other.

It is to be understood that this description is merely exemplary in nature and is not intended to limit the scope of the present invention.

An emergency power-off power distribution cabinet for preventing line self-burning according to some embodiments of the invention is described below with reference to the accompanying drawings.

Examples

Referring to fig. 1-8, the emergency power-off power distribution cabinet for preventing the self-burning of the line provided by the invention comprises a bus voltage division mechanism 100, a cable flame-retardant mechanism 200 and a cable switching mechanism 300, wherein the cable flame-retardant mechanism 200 is arranged on the bus voltage division mechanism 100, and in addition, the cable switching mechanism 300 is connected to the cable flame-retardant mechanism 200.

The busbar partial pressure mechanism 100 comprises a chassis 110, a base 120, an outer frame 130, a base 140, a knife 150 and a shunt assembly 160, wherein the shunt assembly 160 further comprises an outer cover 161, a conductive member 162, a wire tube 163, an electromagnetic member 164 and a safety wire post 165, the cable flame retardant mechanism 200 comprises a bracket 210, a cross beam 220, an auxiliary member 230, a traction wire 240, a cutting assembly 250, a limiting member 260 and a positioning member 270, the cutting assembly 250 further comprises a push rod 251, a vertical rod 252, a loading member 253, a clamping cylinder 254 and a cutting head 255, and the cable transfer mechanism 300 comprises a hanging insulator 310, a safety tube 320, an inner cylinder 330, a protective sleeve 340, a vacuum sleeve 350, a guide member 360, a vacuum circuit breaker 370 and a gasket 380.

Specifically, referring to the length of the electric cable between two electric poles, the base 120 and the case 110 are formed on each electric pole, the supporting force is applied to the bracket 210 and the cross beam 220 integrally by the base 120, the cross beam 220 is used for applying the horizontal sliding support to the cutting assembly 250 mounted on the cable end of the electric pole, and the cutting assembly 250 is applied with the cutting force to the cable end by combining the self-ignition of the cable by the traction wire 240, so that the safety cutting process of the electric cable can be conveniently obtained, the bus voltage division mechanism 100 is mounted on the base 120 formed on the electric pole, the case 110 mounted outside the base 120, the outer frame 130 connected outside the case 110, the base 140 mounted inside the case 110, the blades 150 connected on both sides of the inner cavity of the case 110 and the shunt assembly 160 connected outside the blades 150, and the shunt assembly 160 includes a housing 161 installed inside the base 140, a conductive member 162 built in the housing 161, a spool 163 located in an inner cavity of the housing 161, an electromagnetic member 164 connected to the spool 163, and a safety post 165 movably installed in the spool 163 and the conductive member 162, a cable fire-retarding mechanism 200 installed on the bus bar voltage dividing mechanism 100, and the cable fire-retarding mechanism 200 includes a bracket 210 installed at a top end of the base 120, a cross beam 220 connected to both sides of the bracket 210, an auxiliary member 230 and a positioning member 270 movably installed outside the cross beam 220, a traction wire 240 built in the bracket 210 and the inner cavity of the cross beam 220, a cutting assembly 250 installed outside the cross beam 220, and a stopper 260 installed outside the bracket 210, the cutting assembly 250 including a post 251 movably installed inside the cross beam 220, a vertical rod 252 connected to an outer end bottom of the post 251, a weight 253 installed at a bottom end of the vertical rod 252, the cable switching mechanism 300 is connected between the bus voltage division mechanism 100 and the cable flame retardant mechanism 200, and comprises a vacuum sleeve 350 connected to the bottom of the positioning member 270, a vacuum breaker 370 positioned outside the vacuum sleeve 350, washers 380 mounted at both ends of the vacuum breaker 370, fasteners 390 movably connected inside the washers 380, a hanging insulator 310 mounted inside the vacuum sleeve 350, a safety tube 320 connected to the inner cavity of the hanging insulator 310, an inner tube 330 and a protective sleeve 340 mounted on the top of the safety tube 320, and a guide 360 positioned inside the washer 380 near one end of the vacuum sleeve 350.

Examples

With reference to fig. 2, 3 and 4, on the basis of the first embodiment, by using the bus voltage division mechanism 100 provided on each telegraph pole to control the orientation of the cables in the separate area, the spontaneous combustion part cables can be subjected to the rapid flame-retardant power-off treatment once the individual cables on the telegraph pole have spontaneous combustion caused by short circuit, and by using the blades 150 installed on both sides of the inner cavity of the chassis 110 and capable of transmitting power to two cables adjacently distributed, and by using the wire chips in the blades 150 and capable of being disconnected due to short circuit, the rapid power-off of the cables in the individual area can be effectively facilitated, and by using the combined connection between the conductive members 162 installed inside the housing 161 and the wire tube 163 and the safety wire post 165, the rejection of the permanent magnets at the bottom end of the traction wire 240 by the electromagnetic members 164 due to the short circuit power-off of the cables can be effectively facilitated, the outer end of the traction wire 240 is convenient to apply outward thrust to the whole cutting assembly 250, meanwhile, the U-shaped conductive piece is arranged on the wire tube 163 to connect the electromagnetic piece 164, so that electromagnetic fields between the electromagnetic piece 164 and the traction wire 240 can be conveniently controlled, the chassis 110 and the manufactured base 120 are formed by combining ceramic shells with steel-structure inner containers, one side of the outer part of the manufactured base 120 is provided with a rectangular notch which is adapted to a wire in the electromagnetic piece 164, the knife switch 150 is formed by combining an insulating clamping plate, a conductive chip and a fastening nut, one end of the conductive piece 162 is provided with a circular cushion, the other end of the conductive piece 162 is provided with an electric pile for clamping the conductive chip, the wire tube 163 is formed by a circular conductive buckle and the U-shaped conductive piece, and the U-shaped conductive piece is adapted to be connected in the electromagnetic piece 164.

Examples

As shown in fig. 4, 6 and 7, in the above embodiment, by using two horizontal extending beams 220 to guide and limit the restraint of the outer end of the traction wire 240 and simultaneously using the traction of the outer end of the traction wire 240 to the push rod 251, the clamping cylinder 254 and the array cutting head 255 can cut the combustion layer structure on the cable end, and an annular slot hole recessed inwards is formed in the weight 253, and the hollow of the cable end is isolated by the annular slot hole in the weight 253, so that the cable end can be quickly disconnected independently from the wire pole and self-ignition cable, and the conductive end capable of adaptively clamping the conductive chip in the knife 150 can be used to connect the cable of the conductive chip in the knife 150 by combining the conductive piece 162, with this can make this mechanism to lead safely of electric current on the cable, cylindrical cross bore has been seted up to the inside that support 210 one end was kept away from to crossbeam 220, the traction wire 240 wholly is the T font, and the both ends that the traction wire 240 outwards extended are adaptation respectively and are connected in the inner chamber of two crossbeams 220, hollow shrinkage pool has been seted up to the inside of loading piece 253, and loading piece 253 wholly is made by pottery, inwards sunken annular slotted hole has been seted up to the one end that loading piece 253 was kept away from to clamp cylinder 254, and annular slotted hole inner wall has seted up the recess that is adapted to cutting head 255 free rotation, the recess that is adapted to electric pile in with electrically conductive piece 162 has been seted up to the bottom of safety tube 320, and the screw adaptation on safety tube 320 top is connected in the conductive end of external electric cable god.

Examples

In the above embodiment, as shown in fig. 1, 2 and 8, the safety tube 320, the hanging insulator 310 and the vacuum circuit breaker 370 are integrally and fixedly supported by the vacuum sleeve 350 connected to the bottom of the positioning member 270, and the fastening clips for clamping the hanging insulator 310 are movably installed in the vertical tube at the bottom end of the vacuum sleeve 350 according to the constraint assembly of the plurality of washers 380 and the fasteners 390 to the two ends of the vacuum circuit breaker 370, so that the cables can be safely fastened.

The working principle and the using flow of the invention are as follows:

before use: because the electric wire pole erected in many remote areas and the electric wire cable is suspended in the air today, the electric wire cable is in a long-term suspended state, and the insulation layer outside the electric wire cable is affected by various factors in the environment, so that corrosion and large-scale discharge phenomena of the insulation layer of the electric wire cable can be easily caused, the resistance value in the electric wire cable can be continuously improved, and the manufactured base 120 and the machine box 110 are assembled and installed on the electric wire pole for facilitating the safe erection of the electric wire cable between two adjacent electric wire poles, and meanwhile, the base 140, the knife 150 and the shunt assembly 160 are preloaded inside the machine box 110 and the manufactured base 120;

before use: the electromagnetic member 164 is pre-installed in the middle of the base 120, the outer cover 161, the conductive member 162, the wire tube 163 and the electromagnetic member 164 are simultaneously installed in the case 110, then the cutting assembly 250 is pre-loaded on the outside of the cross beam 220, the vacuum sleeve 350 is fixed by combining the positioning member 270, and the inner ends of the push rods 251 are pulled and connected by the two ends of the pull wires 240 which extend outwards, so that the clamping cylinder 254 and the cutting head 255 are exerted with outward pushing force;

when in use, the utility model is characterized in that: the operator needs to pass the ends of the external cables from the outer ends of the vacuum circuit breaker 370 to the inner sides thereof, respectively, and then connect the cable ends to the top ends of the safety tube 320. The cable and the hanging insulator 310 are respectively clamped by the control washer 380, the fastener 390 and the clamping piece positioned in the vacuum sleeve 350, then the bottom end of the safety tube 320 and the conductive piece 162 are used for clamping the conductive chip in the knife 150, so that the conductive piece 162, the safety wire column 165 and the electromagnetic piece 164 can be transmitted with current, the electromagnetic piece 164 is combined with attraction and repulsion of the permanent magnet at the bottom end of the traction wire 240, the traction wire 240 positioned in the inner cavities of the bracket 210 and the cross beam 220 is controlled to be converted into repulsive force, the insulating layer which can be spontaneously ignited on one end of the cable close to the wire pole is further cut by the weight piece 253, the clamping cylinder 254 and the cutting head 255, and the current on the independent cable is stopped to be transmitted rapidly.

In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items. The terms "mounted," "connected," "secured," and the like are to be construed broadly, as they are used in a fixed or removable connection, or as they are integral with one another, as they are directly or indirectly connected through intervening media. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

It will be understood that when an element is referred to as being "mounted," "secured" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the spirit and scope of the invention as defined by the appended claims and their equivalents.

Claims (7)

1. The utility model provides a prevention circuit is from burning with emergent outage switch board which characterized in that includes:

the bus voltage division mechanism (100) is arranged on a telegraph pole, comprises a manufactured base (120), a chassis (110) arranged outside the manufactured base (120), an outer frame (130) connected to the outer side of the chassis (110), a base (140) arranged inside the chassis (110), a knife blade (150) connected to two sides of an inner cavity of the chassis (110) and a shunt assembly (160) connected to the outside of the knife blade (150), wherein the shunt assembly (160) comprises an outer cover (161) arranged inside the base (140), a conductive piece (162) arranged inside the outer cover (161), a spool (163) arranged inside the outer cover (161), an electromagnetic piece (164) connected to the spool (163) and a safety spool (165) movably arranged inside the spool (163) and the conductive piece (162);

the cable flame-retardant mechanism (200) is arranged on the bus voltage division mechanism (100), and the cable flame-retardant mechanism (200) comprises a bracket (210) arranged at the top end of the manufactured base (120), cross beams (220) connected to two sides of the bracket (210), auxiliary pieces (230) and positioning pieces (270) which are movably arranged outside the cross beams (220), traction wires (240) which are arranged in the inner cavities of the bracket (210) and the cross beams (220), a cutting assembly (250) arranged outside the cross beams (220) and a limiting piece (260) arranged outside the bracket (210);

the cutting assembly (250) comprises a top rod (251) movably arranged in the cross beam (220), a vertical rod (252) connected to the bottom of the outer end of the top rod (251), a load piece (253) arranged at the bottom end of the vertical rod (252), a clamping cylinder (254) arranged at the outer end of the load piece (253) and a cutting head (255) movably connected in a groove on the inner side of the clamping cylinder (254);

the cable switching mechanism (300) is connected between the bus voltage division mechanism (100) and the cable flame-retardant mechanism (200), and the cable switching mechanism (300) comprises a vacuum sleeve (350) connected to the bottom of the positioning piece (270), a vacuum circuit breaker (370) positioned outside the vacuum sleeve (350), gaskets (380) installed at two ends of the vacuum circuit breaker (370), a fastener (390) movably connected inside the gaskets (380), a hanging insulator (310) installed inside the vacuum sleeve (350), a safety tube (320) connected to the inner cavity of the hanging insulator (310), an inner tube (330) and a protective sleeve (340) installed at the top of the safety tube (320) and a guide piece (360) positioned inside the gasket (380) close to one end of the vacuum sleeve (350);

the chassis (110) and the manufactured base (120) are formed by combining a steel-structure liner and a ceramic shell, and one side of the outside of the manufactured base (120) is provided with a rectangular notch which is adapted to the inner lead of the electromagnetic piece (164);

a cylindrical transverse hole is formed in one end, far away from the bracket (210), of the cross beam (220), the whole traction wire (240) is T-shaped, and two ends, extending outwards, of the traction wire (240) are respectively connected to inner cavities of the two cross beams (220) in an adaptive mode;

the combined connection between the conductive piece (162) arranged inside the outer cover (161), the spool (163) and the safety wire column (165) is utilized, so that the cable can be effectively and conveniently repelled by the electromagnetic piece (164) to the permanent magnet at the bottom end of the traction wire (240) due to short circuit and power failure, and the outer end of the traction wire (240) can conveniently apply outward thrust to the whole cutting assembly (250).

2. The emergency power-off power distribution cabinet for preventing self-burning of lines according to claim 1, wherein the knife switch (150) is formed by combining an insulating clamping plate, a conductive chip and a fastening nut.

3. The emergency power-off power distribution cabinet for preventing line self-burning according to claim 1, wherein one end of the conductive member (162) is provided with a circular ring-shaped pad member, and the other end of the conductive member (162) is provided with an electric pile for clamping a conductive chip.

4. The emergency power-off power distribution cabinet for preventing self-burning of a line according to claim 1, wherein the line tube (163) is composed of an annular conductive buckle and a U-shaped conductive member, and the U-shaped conductive member is adapted to be connected in the electromagnetic member (164).

5. The emergency power-off power distribution cabinet for preventing line self-burning according to claim 1, wherein the interior of the weight-bearing part (253) is provided with a hollow concave hole, the whole weight-bearing part (253) is made of ceramic, one end of the clamping cylinder (254) far away from the weight-bearing part (253) is provided with an inwards concave annular groove hole, and the inner wall of the annular groove hole is provided with a groove which is suitable for free rotation of the cutting head (255).

6. The emergency power-off power distribution cabinet for preventing line self-burning according to claim 1, wherein a groove adapted to the electric pile in the conductive piece (162) is formed in the bottom end of the safety tube (320), and a screw hole in the top end of the safety tube (320) is adapted to be connected to a conductive end of an external power cable.

7. An emergency power-off power distribution cabinet for preventing self-combustion of a circuit according to claim 1, wherein a fastening clamping piece for clamping a hanging insulator (310) is movably installed in a vertical pipe at the bottom end of the vacuum sleeve (350).

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