CN114024215A

CN114024215A - Power distribution station feeder safety device

Info

Publication number: CN114024215A
Application number: CN202210007581.6A
Authority: CN
Inventors: 戴吉勇; 闵锐; 孟宾; 孙建瑞; 侯仁鹏; 方宁; 李晓晨; 李保原; 刘书圻; 郭锐
Original assignee: Shandong Wide Area Technology Co ltd
Current assignee: Shengli Oilfield Bangyuan Electric Co ltd
Priority date: 2022-01-06
Filing date: 2022-01-06
Publication date: 2022-02-08
Anticipated expiration: 2042-01-06
Also published as: CN114024215B

Abstract

The invention discloses a distribution station feeder line safety protection device, which relates to the technical field of electric power safety and comprises a supporting device, a conveying device, a guide device, a separation device and a transformer box, wherein the supporting device comprises a bottom plate, the top of the bottom plate is fixedly provided with a protective shell, the bottom of the bottom plate is fixedly provided with at least two first supports, the transformer box and the first supports are consistent in quantity and are arranged on the first supports, the top surface of the bottom plate is provided with the conveying device, the conveying device comprises a second support, the top of the second support is provided with the guide device for guiding current to flow, and the middle of the second support is provided with the separation device for rapidly separating the guide device from the transformer box; when the transformer is damaged, the separating device rapidly breaks the circuit by igniting the gunpowder, and reduces the electric arc generated in the separating process, thereby reducing the loss caused by the electric arc.

Description

Power distribution station feeder safety device

Technical Field

The invention relates to the technical field of electric power safety, in particular to a safety protection device for a feeder line of a power distribution station.

Background

A feeder is a term used in a distribution network, and may refer to a branch connected to any distribution network node, and may be a feed branch or a feed-out branch. Roughly speaking, the branches in the distribution network can all be referred to as feeders. When the current in the feeder line exceeds the rated current, the feeder line and the transformer are automatically disconnected through the breaker, and when the end of the feeder line and the transformer are connected and disconnected, the phenomenon that air is punctured by electric arcs, commonly called electric sparks, occurs when the center temperature is extremely high, metal splashes occur, fire disasters are easily caused, and the electric arcs can cause the conditions of parallel faults caused by line aging and insulation skin damage, poor line contact and the like.

The circuit breaker in the prior art can protect circuits, voltage equipment and the like, but the breaking speed is slow, and large electric arcs are easy to generate.

Disclosure of Invention

Aiming at the defects in the prior art, the invention can cut off the circuit when the circuit current is overloaded, thereby avoiding accidents caused by damage to the circuit due to current overload; when the transformer is damaged, the guiding device and the separating device can be conveyed to the standby transformer box by the conveying device, so that the power-off time of a user is reduced; the separating device of the invention can rapidly break the circuit by detonating the gunpowder, reduce the electric arc generated in the separating process, thereby reducing the loss caused by the electric arc.

The technical scheme adopted by the invention for solving the technical problems is as follows: a distribution station feeder safety protection device comprises a supporting device, a conveying device, a guiding device, a separating device and a transformer box, wherein the supporting device comprises a bottom plate, a protective shell is fixedly installed at the top of the bottom plate, at least two first supports are fixedly installed at the bottom of the bottom plate, the transformer box and the first supports are consistent in quantity and are arranged on the first supports, the conveying device is arranged on the top surface of the bottom plate, the conveying device comprises a second support, the guiding device for guiding current to circulate is arranged at the top of the second support, and the separating device for rapidly separating the guiding device from the transformer box is arranged in the middle of the second support; the utility model discloses a clamping device, including support two, separation device, support three, the bottom fixed mounting of support three has the cylinder, the output of cylinder runs through support three and rotates and install the joint seat, be provided with a plurality of lugs on the bottom surface of joint seat, be provided with on the top surface of support three with the corresponding recess of size looks adaptation in lug position on the joint seat, fixed mounting has the arc handle who is convenient for rotate the joint seat on the joint seat, the top surface fixed mounting of joint seat has support four, the top fixed mounting of support four has ac contactor and pressure boost subassembly.

Furthermore, the pressurizing assembly comprises an accommodating barrel for accommodating gunpowder, the alternating current contactor is connected with the accommodating barrel through an electric wire, the accommodating barrel is fixedly connected with the four supports, a plurality of radiating fins are fixedly mounted on the outer side of the accommodating barrel, and a fan assembly is fixedly mounted on the outer side of the plurality of radiating fins.

Furthermore, a second support is connected with the bottom plate in a sliding mode, a first motor is fixedly mounted on the bottom plate, a first belt wheel is fixedly mounted on an output shaft of the first motor, a second belt wheel is rotatably mounted on the bottom plate, the first belt wheel and the second belt wheel are connected with each other through a transmission belt, the transmission belt comprises a convex block arranged on the transmission belt, and the convex block on the transmission belt is fixedly connected with the second support.

Further, the guiding device comprises a first support fixedly connected with a second support, a second support is fixedly mounted on the first support, a driving assembly is arranged at the top of the second support, a connecting frame is rotatably mounted at the bottom of the second support, an arc-shaped frame is fixedly mounted on the top surface of the middle of the connecting frame, a convex column used for being matched with the separating device to protect the circuit is fixedly mounted on the bottom surface of the middle of the connecting frame, a contact block used for connecting the voltage transformation box and the connecting frame is slidably connected to the other end of the connecting frame, a first spring is sleeved on the contact block, the top end of the first spring is fixedly connected with the connecting frame, the bottom end of the first spring is fixedly connected with the contact block, a conductive rod is further slidably connected to the bottom of the second support, the conductive rod is connected with the alternating current contactor through an electric wire, a second spring is sleeved on the conductive rod, and one end of the second spring is fixedly connected with the conductive rod, the other end of the second spring is fixedly connected with the second support, one end of the conductive rod is communicated with the feeder line, the other end of the conductive rod is in contact fit with the second support through the pressure of the second spring, a detection assembly is further mounted on the second support, and the conductive rod penetrates through the detection assembly.

Furthermore, the driving assembly comprises a first transmission shaft and a second transmission shaft which are rotatably connected with a second support, clamping wheels are fixedly mounted at two ends and the middle of the first transmission shaft and the second transmission shaft, the inner annular surface of the arc-shaped frame is slidably connected with the clamping wheels on the first transmission shaft, the outer annular surface of the arc-shaped frame is slidably connected with the clamping wheels on the second transmission shaft, a gear ring is fixedly mounted on the outer annular surface of the clamping wheel at the middle of the second transmission shaft, a second motor is fixedly mounted at a position, close to the gear ring, of the second support, a gear is fixedly mounted on an output shaft of the second motor, and the gear is meshed with the gear ring.

Further, the detection assembly comprises a fifth support fixedly connected with a second support, an iron core and an alarm are fixedly mounted on the fifth support, a coil is sleeved on the iron core, the coil is connected with the alarm through an electric wire, the alarm is connected with the alternating current contactor through an electric wire, and the alternating current contactor is connected with the coil through an electric wire.

Furthermore, the type and the size of the first transmission shaft are consistent with those of the second transmission shaft.

Furthermore, the contact block and the connecting frame are made of conductive materials.

Compared with the prior art, the invention has the beneficial effects that: (1) when the circuit current is overloaded, the circuit can be disconnected, so that accidents caused by damage to the circuit due to the current overload are avoided; (2) when the transformer is damaged, the guiding device and the separating device can be conveyed to the standby transformer box by the conveying device, so that the power-off time of a user is reduced; (3) the separating device of the invention can rapidly break the circuit by detonating the gunpowder, reduce the electric arc generated in the separating process, thereby reducing the loss caused by the electric arc.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

FIG. 2 is a schematic view of the overall structure of the present invention.

FIG. 3 is a schematic structural diagram of the supporting device of the present invention.

FIG. 4 is a schematic structural diagram of a conveying apparatus according to the present invention.

FIG. 5 is a schematic view of the structure of the guiding device of the present invention.

Fig. 6 is a partial structural view of the guiding device of the present invention.

Fig. 7 is another partial structure diagram of the guiding device of the present invention.

FIG. 8 is a schematic view of the structure of the separation device of the present invention.

FIG. 9 is a partial structural view of the separation device of the present invention.

In the figure: 1. a support device; 2. a conveying device; 3. a guide device; 4. a separation device; 5. a transformer tank; 101. a base plate; 102. a protective shell; 103. a first support; 201. a second support; 202. a first motor; 203. a first belt wheel; 204. a second belt wheel; 205. a transmission belt; 301. a first bracket; 302. a second bracket; 303. a drive assembly; 304. a connecting frame; 305. an arc-shaped frame; 306. a convex column; 307. a contact block; 308. a first spring; 309. a conductive rod; 310. a second spring; 311. a detection component; 30301. a first transmission shaft; 30302. a second transmission shaft; 30303. a pinch wheel; 30304. a ring gear; 30305. a second motor; 30306. a gear; 31101. a fifth bracket; 31102. an iron core; 31103. a coil; 31104. an alarm; 401. a third bracket; 402. a cylinder; 403. a clamping seat; 404. an arc-shaped handle; 405. a fourth bracket; 406. an AC contactor; 407. a pressurizing assembly; 40701. an accommodating cylinder; 40702. a heat sink; 40703. a fan assembly.

Detailed Description

In the following description of the present invention, it is to be noted that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the following description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the connection may be direct or indirect via an intermediate medium, and the connection may be internal to the two components. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The invention will be further described with reference to the drawings and illustrative embodiments, which are provided herein to illustrate and not to limit the invention. In addition, if a detailed description of the known art is not necessary to show the features of the present invention, it is omitted.

Example (b): as shown in fig. 1 to 8, a distribution station feeder safety protection device includes a supporting device 1, a transmitting device 2, a guiding device 3, a separating device 4, and a transforming box 5, where the supporting device 1 includes a bottom plate 101, a protective shell 102 is fixedly installed on the top of the bottom plate 101, at least two first supports 103 are fixedly installed on the bottom of the bottom plate 101, the transforming box 5 and the first supports 103 are in the same number and are disposed on the first supports 103, the transmitting device 2 is disposed on the top surface of the bottom plate 101, the transmitting device 2 includes a second support 201, the guiding device 3 for guiding current to flow is disposed on the top of the second support 201, and the separating device 4 for rapidly separating the guiding device 3 from the transforming box 5 is disposed in the middle of the second support 201.

Under the normal operating condition of the circuit, the transformer box 5 is connected with the feeder line through the guiding device 3, when the current in the feeder line is overloaded, the guiding device 3 transmits a signal to the separating device 4, the separating device 4 rapidly separates the guiding device 3 from the transformer box 5, so that the circuit is disconnected, accidents caused by damage to the circuit due to the overload current are avoided, if the transformer is damaged, the guiding device 3 and the separating device 4 are transmitted to the standby transformer box 5 through the transmitting device 2, and the power-off time of a user is reduced.

The conveying device 2 comprises a second support 201 connected with the base plate 101 in a sliding mode, a first motor 202 is fixedly mounted on the base plate 101, a first belt wheel 203 is fixedly mounted on an output shaft of the first motor 202, a second belt wheel 204 is further rotatably mounted on the base plate 101, the first belt wheel 203 and the second belt wheel 204 are connected with each other through a transmission belt 205, the transmission belt 205 comprises a convex block arranged on the transmission belt 205, and the convex block on the transmission belt 205 is fixedly connected with the second support 201.

When the standby transformer tank 5 needs to be used, the first motor 202 is started, the first motor 202 drives the first belt wheel 203 to rotate, the first belt wheel 203 drives the transmission belt 205 and the second belt wheel 204 to rotate, in the process, the convex block on the transmission belt 205 drives the second support 201 to slide, and the second support 201 drives the guide device 3 and the separation device 4 to displace until the standby transformer tank 5 is located.

The separating device 4 comprises a third support 401 fixedly connected with a second support 201, an air cylinder 402 is fixedly mounted at the bottom of the third support 401, an output end of the air cylinder 402 penetrates through the third support 401 and is rotatably mounted with a clamping seat 403, a plurality of convex blocks are arranged on the bottom surface of the clamping seat 403, a groove which corresponds to the convex blocks on the clamping seat 403 in position and is matched with the convex blocks in size is arranged on the top surface of the third support 401, an arc-shaped handle 404 which is convenient for rotating the clamping seat 403 is fixedly mounted on the clamping seat 403, a fourth support 405 is fixedly mounted on the top surface of the clamping seat 403, and an alternating current contactor 406 and a pressurizing assembly 407 are fixedly mounted at the top of the fourth support 405; the pressurizing assembly 407 comprises an accommodating cylinder 40701 for placing gunpowder, the ac contactor 406 is connected with the accommodating cylinder 40701 through an electric wire, the accommodating cylinder 40701 is fixedly connected with the bracket four 405, a plurality of cooling fins 40702 are fixedly mounted on the outer side of the accommodating cylinder 40701, a plurality of fan assemblies 40703 are fixedly mounted on the outer side of the cooling fins 40702, a driving motor (not shown in the figure) is arranged inside the fan assemblies 40703, and when the external temperature is too high, the fan assemblies 40703 can be started to cool and protect the accommodating cylinder 40701 so as to prevent the gunpowder from being detonated due to the too high external temperature.

The guiding device 3 comprises a first support 301 fixedly connected with a second support 201, a second support 302 is fixedly installed on the first support 301, a driving assembly 303 is arranged at the top of the second support 302, a connecting frame 304 is rotatably installed at the bottom of the second support 302, an arc-shaped frame 305 is fixedly installed on the top surface of the middle of the connecting frame 304, a convex column 306 used for being matched with a separating device 4 to protect a circuit is fixedly installed on the bottom surface of the middle of the connecting frame 304, a contact block 307 used for connecting a voltage transformation box 5 and the connecting frame 304 is slidably connected to the other end of the connecting frame 304, a first spring 308 is sleeved on the contact block 307, the top end of the first spring 308 is fixedly connected with the connecting frame 304, the bottom end of the first spring 308 is fixedly connected with the contact block 307, a conductive rod 309 is further slidably connected to the bottom of the second support 302, and the conductive rod 309 is connected with an alternating current contactor 406 through an electric wire, a second spring 310 is sleeved on the conductive rod 309, one end of the second spring 310 is fixedly connected with the conductive rod 309, the other end of the second spring 310 is fixedly connected with the second support 302, one end of the conductive rod 309 is communicated with the feeder line, the other end of the conductive rod 309 is in contact fit with the second support 304 through the pressure of the second spring 310, a detection assembly 311 is further mounted on the second support 302, the conductive rod 309 penetrates through the detection assembly 311, the contact block 307 and the second support 304 are both made of conductive materials, the driving assembly 303 comprises a first transmission shaft 30301 and a second transmission shaft 30302 which are rotatably connected with the second support 302, the type and the size of the first transmission shaft 30301 are consistent with those of the second transmission shaft 30302, clamping wheels 30303 are fixedly mounted at both ends and in the middle of the first transmission shaft 30301 and the second transmission shaft 30302, the inner annular surface of the arc-shaped frame 305 is in sliding connection with the clamping wheel 30303 on the first transmission shaft 30302, a gear ring 30304 is fixedly mounted on the outer annular surface of a clamping wheel 30303 in the middle of the transmission shaft two 30302, a motor two 30305 is fixedly mounted on the bracket two 302 near the gear ring 30304, a gear 30306 is fixedly mounted on the output shaft of the motor two 30305, the gear 30306 is meshed with the gear ring 30304, the detection assembly 311 comprises a bracket five 31101 fixedly connected with the bracket two 302, an iron core 31102 and an alarm 31104 are fixedly mounted on the bracket five 31101, a coil 31103 is sleeved on the iron core 31102, the coil 31103 is connected with the alarm 31104 through an electric wire, the alarm 31104 is connected with the ac contactor 406 through an electric wire, and the ac contactor 406 is connected with the coil 31103 through an electric wire.

When the circuit is in a normal working state, the current flows to the connecting frame 304 through the contact block 307 and flows to the conductive rod 309 through the connecting frame 304, the conductive rod 309 is connected with the feeder line to form a communicated circuit, when the circuit needs to be checked and the like, the motor II 30305 is started, the motor II 30305 drives the gear 30306 to rotate, the gear 30306 drives the gear ring 30304 to rotate, the gear ring 30304 drives the clamping wheel 30303 fixedly connected with the gear ring 30304 to rotate, the clamping wheel 30303 drives the transmission shaft II 30302 to rotate, the transmission shaft II 30302 drives the clamping wheels 30303 at the two ends to rotate, the clamping wheel 30303 drives the arc-shaped frame 305 to slide between the upper clamping wheel 30303 and the lower clamping wheel 30303 in the rotating process, the arc-shaped frame 305 drives the connecting frame 304 and the convex column 306 to swing, when the swing angle is over, the contact block 307 is separated from the transformation box 5, so that the circuit is broken, and the operation such as circuit inspection is performed; when the detecting component 311 detects that the current in the conducting rod 309 is overloaded, because the electric energy transportation adopts an alternating current transportation mode, a magnetic field exists around the conducting rod, and the detecting component 311 is arranged around the magnetic field, the magnetic field passes through the detecting component 311, current is generated in the coil 31103 due to the magnetic induction principle, and when the current in the conducting rod 309 is too large, the current generated by the coil 31103 is also increased, so that the static iron core 31102 generates electromagnetic attraction force to change the pressure of the magnetic attraction force to attract the moving iron core 31102 to close the normally open contact of the alternating current contactor 406, at this time, the current flows from the conducting rod 309 to the alternating current contactor 406 through the electric wire, and flows from the alternating current contactor 406 to the accommodating cylinder 40701 in the pressurizing component 407 through the electric wire, the current ignites gunpowder in the accommodating cylinder 40701, and under the effect of explosion impact force, the convex column 306 on the accommodating cylinder 40701 drives the connecting frame 304 and the arc-shaped frame 305 to swing upwards, make contact piece 307 and vary voltage box 5 separation in twinkling of an eye, make the circuit break, avoid producing the accident that damages and arouse because of current overload, when needs pack powder in holding section of thick bamboo 40701, start cylinder 402, cylinder 402 drives joint seat 403 rebound, break away from the joint with three 401 of support, at this moment with hand pulling arc handle 404, arc handle 404 drives four 405 of support and pressure boost subassembly 407 and rotates to the side, conveniently pack powder, after filling, rotate four 405 of support to the normal position through promoting arc handle 404, start cylinder 402, cylinder 402 drives joint seat 403 and moves down, make joint seat 403 and three 401 of support joint each other, can not blown easily under the stormy weather.

The working principle of the invention is as follows: under the normal operating condition of the circuit, the transformer box 5 is connected with the feeder line through the guiding device 3, when the current in the feeder line is overloaded, the guiding device 3 transmits a signal to the separating device 4, the separating device 4 rapidly separates the guiding device 3 from the transformer box 5, so that the circuit is disconnected, accidents caused by damage to the circuit due to the overload current are avoided, if the transformer is damaged, the guiding device 3 and the separating device 4 are transmitted to the standby transformer box 5 through the transmitting device 2, and the power-off time of a user is reduced.

It should be understood that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same, and those skilled in the art can modify the technical solutions described in the above embodiments, or make equivalent substitutions for some technical features; and all such modifications and alterations are intended to fall within the scope of the appended claims.

Claims

1. The utility model provides a power distribution station feeder safety device, includes strutting arrangement (1), conveyer (2), guiding device (3), separator (4), vary voltage case (5), its characterized in that: the supporting device (1) comprises a bottom plate (101), a protective shell (102) is fixedly mounted at the top of the bottom plate (101), at least two first supports (103) are fixedly mounted at the bottom of the bottom plate (101), the number of the transformer boxes (5) is consistent with that of the first supports (103) and the transformer boxes are arranged on the first supports (103), a conveying device (2) is arranged on the top surface of the bottom plate (101), the conveying device (2) comprises a second support (201), a guiding device (3) for guiding current to flow is arranged at the top of the second support (201), and a separating device (4) for rapidly separating the guiding device (3) from the transformer boxes (5) is arranged in the middle of the second support (201); separator (4) include three (401) of support with two (201) fixed connection, the bottom fixed mounting of three (401) of support has cylinder (402), the output of cylinder (402) runs through three (401) of support and rotates and install joint seat (403), be provided with a plurality of lugs on the bottom surface of joint seat (403), be provided with on the top surface of three (401) of support and the corresponding and size looks adaptation's of lug position on joint seat (403) recess, fixed mounting has arc handle (404) of being convenient for to rotate joint seat (403) on joint seat (403), the top surface fixed mounting of joint seat (403) has four (405) of support, the top fixed mounting of four (405) of support has ac contactor (406) and pressure boost subassembly (407).

2. A substation feeder safety shield according to claim 1, wherein: the pressurizing assembly (407) comprises an accommodating cylinder (40701) for placing gunpowder, the alternating current contactor (406) is connected with the accommodating cylinder (40701) through an electric wire, the accommodating cylinder (40701) is fixedly connected with the bracket IV (405), a plurality of cooling fins (40702) are fixedly mounted on the outer side of the accommodating cylinder (40701), and a fan assembly (40703) is fixedly mounted on the outer side of the cooling fins (40702).

3. A substation feeder safety shield according to claim 1, wherein: the support II (201) is connected with the base plate (101) in a sliding mode, the base plate (101) is fixedly provided with the motor I (202), an output shaft of the motor I (202) is fixedly provided with the belt wheel I (203), the base plate (101) is further rotatably provided with the belt wheel II (204), the belt wheel I (203) and the belt wheel II (204) are connected with each other through a transmission belt (205), the transmission belt (205) comprises a convex block arranged on the transmission belt (205), and the convex block on the transmission belt (205) is fixedly connected with the support II (201).

4. A substation feeder safety shield according to claim 3 wherein: the guide device (3) comprises a first support (301) fixedly connected with a second support (201), the first support (301) is fixedly provided with a second support (302), the top of the second support (302) is provided with a driving component (303), the bottom of the second support (302) is rotatably provided with a connecting frame (304), the top surface of the middle part of the connecting frame (304) is fixedly provided with an arc-shaped frame (305), the bottom surface of the middle part of the connecting frame (304) is fixedly provided with a convex column (306) used for being matched with a separating device (4) to protect a circuit, the other end of the connecting frame (304) is slidably connected with a contact block (307) used for connecting a transformer box (5) and the connecting frame (304), the contact block (307) is sleeved with a first spring (308), the top end of the first spring (308) is fixedly connected with the connecting frame (304), and the bottom end of the first spring (308) is fixedly connected with the contact block (307), the bottom of support two (302) is sliding connection still has conducting rod (309), conducting rod (309) and ac contactor (406) pass through the connection of electric lines, has cup jointed spring two (310) on conducting rod (309), the one end and the conducting rod (309) fixed connection of spring two (310), the other end and support two (302) fixed connection of spring two (310), the one end and the feeder intercommunication of conducting rod (309), the other end of conducting rod (309) pass through the pressure and the link (304) contact cooperation of spring two (310), still install detecting component (311) on support two (302), conducting rod (309) runs through detecting component (311).

5. A substation feeder safety shield according to claim 4, wherein: the driving assembly (303) comprises a transmission shaft I (30301) and a transmission shaft II (30302) which are rotatably connected with a support II (302), clamping wheels (30303) are fixedly arranged at two ends and the middle parts of the transmission shaft I (30301) and the transmission shaft II (30302), the inner annular surface of the arc-shaped frame (305) is slidably connected with the clamping wheel (30303) on the transmission shaft I (30301), the outer annular surface of the arc-shaped frame (305) is slidably connected with the clamping wheel (30303) on the transmission shaft II (30302), a gear ring (30304) is fixedly arranged on the outer annular surface of the clamping wheel (30303) in the middle part of the transmission shaft II (30302), a motor II (30305) is fixedly arranged at the position, close to the gear ring (30304), a gear (30306) is fixedly arranged on the output shaft of the motor II (30305), and the gear ring (30306) and the gear ring (30304) are mutually meshed.

6. A substation feeder safety shield according to claim 4, wherein: detection element (311) including with support two (302) fixed connection's support five (31101), fixed mounting has iron core (31102) and siren (31104) on support five (31101), coil (31103) has been cup jointed on iron core (31102), coil (31103) pass through electric wire connection with siren (31104), and siren (31104) pass through electric wire connection with ac contactor (406), and ac contactor (406) pass through electric wire connection with coil (31103).

7. A substation feeder safety shield according to claim 5, wherein: the type and the size of the transmission shaft I (30301) are consistent with those of the transmission shaft II (30302).

8. A substation feeder safety shield according to claim 4, wherein: the contact block (307) and the connecting frame (304) are both made of conductive materials.