CN115020134A

CN115020134A - High-voltage circuit breaker for power grid distribution system

Info

Publication number: CN115020134A
Application number: CN202210422551.1A
Authority: CN
Inventors: 王佳
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-09-06

Abstract

The invention relates to a circuit breaker, in particular to a high-voltage circuit breaker for a power distribution system of a power grid. The circuit breaker comprises a circuit breaker body, the circuit breaker body comprises two outer shells, the two outer shells are combined to form an accommodating chamber, two wiring assemblies are arranged on the periphery of the accommodating chamber, a heat release groove capable of achieving air circulation is formed in the outer portion of the outer shell, the heat release assembly is arranged on the heat release groove, and the opening and closing degree of the heat release assembly and the heat release groove is controlled by a switch. According to the invention, the opening and closing degree of the heat release assembly and the heat release groove is controlled by the switch, so that a heat release channel can be provided for the interior of the breaker after short circuit or high temperature is realized, and the problem that the breaker embedded in a wall or equipment is not easy to radiate heat is solved.

Description

High-voltage circuit breaker for power grid distribution system

Technical Field

The invention relates to a circuit breaker, in particular to a high-voltage circuit breaker for a power distribution system of a power grid.

Background

The circuit breaker is a switching device capable of closing, carrying, and opening/closing a current under a normal circuit condition and a current under an abnormal circuit condition within a prescribed time. The circuit breakers are divided into high-voltage circuit breakers and low-voltage circuit breakers according to the application range, the high-voltage and low-voltage boundary lines are relatively vague, and the circuit breakers above 3kV are generally called high-voltage electric appliances.

General circuit breaker includes two shell bodies, two shell bodies are combined through bolt or other connecting pieces that can dismantle, form the accommodation chamber between two shell bodies after the combination, the periphery of accommodation chamber is provided with two wiring subassemblies, one of them is connected with the positive terminal that the external world inserts, another is connected with the negative terminal that the external world inserts, in order to control the break-make of positive terminal and negative terminal, the position that lies in between two wiring subassemblies in the accommodation chamber is provided with trigger assembly and switch, through trigger assembly with two wiring subassembly accesses positive, negative terminal intercommunication, trigger switch tripping operation when the indoor temperature of disconnection or accommodation is too high.

However, when the circuit breaker is installed, the circuit breaker is usually embedded into a cavity for installation, and the circuit breaker is embedded into a shell of a corresponding device in a high-voltage power grid distribution system.

Disclosure of Invention

The present invention is directed to a high voltage circuit breaker for a power distribution system of a power grid, so as to solve the problems mentioned in the background art.

For realizing above-mentioned purpose, provide a high voltage circuit breaker for electric wire netting distribution system, it includes the circuit breaker body, the circuit breaker body includes two shells, and two shell body combinations form the accommodation chamber, the periphery of accommodation chamber is provided with two wiring subassemblies, and one of them is connected with the positive terminal that external world inserts, and another is connected with the negative terminal that external world inserts, the position that is located between two wiring subassemblies in the accommodation chamber is provided with trigger assembly and switch, through trigger assembly with two wiring subassembly accesses positive, negative terminal intercommunication for trigger switch tripping operation, the external heat release groove that can carry out the circulation of air that sets up of shell to set up the heat release subassembly on the heat release groove, the degree of opening and shutting of heat release subassembly and heat release groove is controlled by the switch.

As the further improvement of the technical scheme, the wiring component comprises a wiring pipe and a contact terminal, the wiring pipe and the contact terminal are arranged on the same shell, and the wiring end penetrates into the accommodating chamber through the wiring pipe and contacts with the contact terminal.

As a further improvement of the technical scheme, the contact wire end is fixedly arranged on the shell body installed on the wire inlet pipe, and the fixedly arranged contact wire end is close to the wire inlet pipe so as to guide the wiring end through the wire inlet pipe and enable the wiring end to be in contact with the end part of the contact wire end.

As a further improvement of the technical scheme, the contact wire end comprises a head, a threaded rod and a threaded pipe, the threaded pipe is fixedly connected with the outer shell installed in the wire inlet pipe, the threaded rod is connected in the threaded pipe in a threaded mode, the head is arranged at one end, located in the containing chamber, of the threaded rod, and the head is used for contacting with a wiring end.

As a further improvement of this technical scheme, trigger the subassembly and include just touching the electroplax and the board is touched to the burden, just touch the electroplax and insert anodal touch line end and be connected, touch the electroplax and insert the negative pole burden and touch line end and be connected, be provided with trip group and electromagnetism trip spare between touching the electroplax and the burden and touch between the electroplax just, wherein:

the tripping group and the electromagnetic tripping piece are matched with the positive contact plate and the negative contact plate to guide current, so that the current output by the positive terminal enters the negative terminal.

As a further improvement of this technical scheme, the trip group is including taking off board, driving plate and hot trip board, the one end of taking off the board with just electrocute the board contact and form first trip portion, the other end and the driving plate contact formation second trip portion, wherein:

the electromagnetic tripping piece comprises a coil, the transmission plate is connected with the coil through a lead, and the coil is connected with the thermal tripping plate through a lead;

an electromagnetic trip rod is arranged in the coil, the trip plate and the transmission plate are both rotationally connected with the outer shell, a through hole is formed in the trip plate on the telescopic path of the electromagnetic trip rod, the telescopic end of the electromagnetic trip rod penetrates through the through hole, a pressing cap is arranged at the end part of the electromagnetic trip rod, and the pressing cap presses the trip plate when the electromagnetic trip rod contracts;

the driving plate is provided with a stress plate relative to one end of the second tripping part, the thermal tripping plate is heated and then bends towards the side where the stress plate is located, and the bent thermal tripping plate presses the stress plate.

As a further improvement of the technical scheme, a switch groove is formed in the position, corresponding to the switch, of the outer shell, the switch is rotationally connected with the switch groove, and a transmission ring is arranged between the switch and the transmission plate.

As a further improvement of the technical solution, the outer casing protrudes to the side where the switch is located to form a protrusion, and after the circuit breaker is installed, the heat releasing groove is opened at the top of the protrusion.

As a further improvement of the technical scheme, the heat release assembly comprises a sealing plate and a pull ring, a limiting plate is arranged on a heat release groove of one of the two outer shells, a switching frame is arranged on a heat release groove of the other outer shell, the limiting plate and the switching frame are both arranged on one side, protruding relative to the protruding portion, of the heat release groove, after the two outer shells are connected, a switching portion connected with the sealing plate in a rotating mode is formed by the limiting plate and the switching frame, the pull ring is arranged between one side, corresponding to the switching, of the sealing plate and the switch, and the sealing plate and the switch are movably connected through the pull ring.

As a further improvement of the technical scheme, an isolation cover is arranged outside the heat release groove, and a flow guide channel is formed outside the heat release groove through the isolation cover.

Compared with the prior art, the invention has the beneficial effects that:

1. in this electric wire netting is high voltage circuit breaker for distribution system, the degree that opens and shuts of heat release subassembly and heat release groove receives on-off control to realize short circuit or high temperature back, can provide the passageway of a heat release for the circuit breaker is inside, thereby solve the embedding and set up the circuit breaker difficult radiating problem in the wall body or equipment.

2. In this electric wire netting is high voltage circuit breaker for distribution system, just touch the electric plate, the circulation of electric current between positive electrode wiring end and the negative electrode wiring end is realized to the negative electricity board cooperation trip gear and electromagnetism trip gear, and the electromagnetism trip gear is under the condition of high temperature or two kinds of differences of short circuit, can cooperate the trip gear to form first trip portion and second trip portion, through first trip portion and second trip portion and contact surface dissociation resolution this problem of protection of breaking, with shrouding jack-up simultaneously, realize thermal release.

3. In the high-voltage circuit breaker for the power grid distribution system, the isolation cover is arranged outside the heat release groove, and the flow guide channel is formed outside the heat release groove through the isolation cover, so that the flow guide channel is always arranged outside the heat release groove after the circuit breaker is installed, and the limitation of the installation environment is avoided.

Drawings

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

FIG. 2 is an exploded view of the overall structure of the present invention;

FIG. 3 is a schematic view of the wiring assembly of the present invention;

FIG. 4 is a general view of the internal structure of the outer casing of the present invention;

FIG. 5 is a schematic structural diagram of a trigger assembly according to the present invention;

FIG. 6 is a schematic view of the internal mounting structure of the outer housing of the present invention;

FIG. 7 is a schematic current flow diagram of the wiring assembly and the trigger assembly of the present invention;

FIG. 8 is a schematic view of a heat releasing assembly according to the present invention;

FIG. 9 is a bottom view of the closure plate of the present invention;

FIG. 10 is a schematic structural view of the operation principle of the sealing plate in the short circuit condition according to the present invention;

FIG. 11 is a schematic structural view of the operation principle of the sealing plate under high temperature action according to the present invention;

FIG. 12 is a schematic structural view illustrating the operation principle of the sealing plate under the simultaneous action of short circuit and high temperature according to the present invention;

FIG. 13 is a side view of the sealing plate with a cushioning member of the present invention;

fig. 14 is a schematic structural view of the outer shell with through holes according to the present invention.

The various reference numbers in the figures mean:

100. a circuit breaker body;

110. an outer housing; 111. a mounting seat; 112. a supporting seat; 113. a rotating shaft; 114. a protrusion; 1141. a heat release tank; 1142. a switch slot; 1143. a limiting plate; 1144. a transfer rack; 1145. an isolation cover; 1146. a buffer member; 115. a partition plate; 1151. a through hole; 100A, an accommodating chamber;

120. a wiring assembly; 121. a wire inlet pipe; 122. a contact end; 1221. a head; 1222. a threaded rod; 1223. a threaded pipe;

130. a trigger component; 131. a positive contact plate; 132. removing the plate; 1321. perforating; 133. an electromagnetic trip piece; 1331. a coil; 1332. an electromagnetic trip bar; 1333. pressing the cap; 134. a drive plate; 135. a stress plate; 136. a thermal trip plate; 137. a negative contact plate;

140. a switch; 141. a conductive ring;

150. a heat releasing assembly; 151. closing the plate; 1511. an outer sealing ring; 1512. an inner plate; 1513. an inner sealing ring; 152. and (4) a pull ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Further, in the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

The invention provides a high-voltage circuit breaker for a power distribution system of a power grid, which is used in a high-voltage environment of power distribution of the power grid to ensure the safety of a power distribution circuit, and is the same as a common circuit breaker, referring to fig. 1 and fig. 2, the circuit breaker of the invention comprises a circuit breaker body 100, the circuit breaker body 100 comprises two outer shells 110, the two outer shells 110 are combined through bolts or other detachable connecting pieces, a containing chamber 100A is formed between the two combined outer shells 110, two wiring assemblies 120 are arranged on the periphery of the containing chamber 100A, one of the wiring assemblies is connected with a positive terminal accessed from the outside, the other wiring assembly is connected with a negative terminal accessed from the outside, in order to control the on-off of the positive terminal and the negative terminal, a trigger assembly 130 and a switch 140 are arranged in the containing chamber 100A at a position between the two wiring assemblies 120, the triggering assembly 130 connects the positive and negative terminals of the two wiring assemblies 120, and the trigger switch 140 trips when the circuit is broken or the temperature in the accommodating chamber 100A is too high (i.e. the tripping end of the triggering assembly 130 is separated from the contact surface, so that the positive and negative terminals are in a disconnected state), the present invention is different from a general circuit breaker in that: a heat releasing groove 1141 for air circulation is arranged outside the outer casing 110, a heat releasing assembly 150 is arranged on the heat releasing groove 1141, the opening and closing degree of the heat releasing assembly 150 and the heat releasing groove 1141 is controlled by the switch 140 (i.e. the releasing capability of the heat in the accommodating chamber 100A is controlled by the opening and closing degree), the main purpose is to solve the problem that the circuit breaker embedded in the wall or the equipment is not easy to dissipate heat, especially the circuit breaker damage caused by accidental tripping due to the failure of timely heat dissipation after tripping, the specific principle is illustrated by the following embodiments,

in the first embodiment, please refer to fig. 3, the connection mode of the connection terminal is improved in the drawing, because the prior art usually has a groove formed on the side of the outer housing 110, and a circular groove capable of penetrating the connection terminal can be formed after the two outer housings 110 are closed, but the connection terminal is easily damaged, so that the connection module 120 is disclosed, the connection module 120 includes the wire inlet tube 121, the wire inlet tube 121 is disposed on one of the outer housings 110, and a semicircular groove is formed on the other outer housing 110 corresponding to the position of the wire inlet tube 121, so as to provide a receiving space for the wire inlet tube 121 during connection, so that the connection terminal can penetrate into the receiving chamber 100A through the wire inlet tube 121, so that the wire inlet tube 121 can protect the connection terminal, and prevent the wire from being scratched by the groove wall formed on the outer housing 110, the connection module 120 further includes the wire contact terminal 122, and there are two connection modes of the contact terminal 122:

firstly, the contact end 122 is fixedly arranged on the outer shell 110 on which the inlet pipe 121 is arranged, the fixedly arranged contact end 122 is close to the inlet pipe 121, and the contact end is guided by the inlet pipe 121 to be contacted with the end part of the contact end 122;

and secondly, the contact wire end 122 comprises a head 1221, a threaded rod 1222 and a threaded pipe 1223, the threaded pipe 1223 is fixedly connected with the outer shell 110 mounted on the wire inlet pipe 121, the threaded rod 1222 is threaded in the threaded pipe 1223, the head 1221 is arranged at one end of the threaded rod 1222 positioned in the accommodating chamber 100A, the head 1221 is used as the end of the contact wire end 122 to be contacted with a terminal penetrating in the wire inlet pipe 121, and when in use, the threaded rod 1222 is screwed, so that the head 1221 limits the terminal, and the contact stability of the head 1221 and the terminal is improved.

It should be noted that either the individual contact ends 122 or the contact ends 122 formed by the head 1221, the threaded rod 1222, and the threaded tube 1223 are electrically conductive.

A second embodiment, please refer to fig. 4, which discloses the trigger assembly 130 specifically based on the first embodiment, where the trigger assembly 130 includes a positive contact plate 131 and a negative contact plate 137, the positive contact plate 131 is connected to the positive contact end 122, the negative contact plate 137 is connected to the negative contact end 122, a trip set and an electromagnetic trip 133 are disposed between the positive contact plate 131 and the negative contact plate 137, the positive contact plate 131 guides the current output from the positive electrode to the electromagnetic trip 133 through the trip set, and then flows to the trip set through the electromagnetic trip 133 (where two current guiding portions of the trip set are in an isolated state), and the current is guided to the negative contact plate 137 by the trip set, so as to realize the current flowing between the positive terminal and the negative terminal, specifically:

referring to fig. 5, the trip unit includes a trip plate 132, a driving plate 134 and a thermal trip plate 136, one end of the trip plate 132 contacts with the positive contact plate 131 to form a first trip portion, and the other end contacts with the driving plate 134 to form a second trip portion, referring to fig. 7, the driving plate 134 is connected with a coil 1331 of the electromagnetic trip 133 through a wire, the coil 1331 is connected with the thermal trip plate 136 through a wire, it should be noted that a portion of the driving plate 134 not contacting with the trip plate 132 is not conductive, and a wire between the coil 1331 and the driving plate 134 is connected with a portion of the driving plate 134 contacting with the trip plate 132, so as to achieve isolation of two current guiding portions of the trip unit, where a direction indicated by an arrow in fig. 7 is a current direction, that is: the current output by the positive terminal flows to the positive contact plate 131 through the contact terminal 122, then flows into the releasing plate 132 through the positive contact plate 131, flows into the transmission plate 134 through the releasing plate 132, the transmission plate 134 guides the current into the coil 1331 by matching with a lead, the coil 1331 is matched with a lead connected with the thermal releasing plate 136 to guide the current into the thermal releasing plate 136, the thermal releasing plate 136 is contacted with the negative contact plate 137, the current is guided to the contact terminal 122 connected with the negative terminal through the negative contact plate 137, and then flows out from the negative terminal, and the current is in a path state in the whole process.

When the circuit is used, two situations occur, one is that a short circuit occurs in a circuit, and the other is that the load of the circuit is overlarge, so that the temperature of a peripheral environment rises, and aiming at the two situations, the following two triggering modes are provided:

firstly, when a short circuit occurs in a line, the current in the coil 1331 increases, at this time, the electromagnetic trip rod 1332 arranged in the coil 1331 is contracted by magnetic force, here, the trip plate 132 and the transmission plate 134 are both rotatably connected with the outer shell 110, the trip plate 132 is provided with a through hole 1321 on the telescopic path of the electromagnetic trip rod 1332, the telescopic end of the electromagnetic trip rod 1332 passes through the through hole 1321, and the end part is provided with a pressing cap 1333, the pressing cap 1333 presses the trip plate 132 when the electromagnetic trip rod 1332 contracts, at this time, the rotating trip plate 132 forms a lever structure, one end is pressed and then separated from the positive contact plate 131, at this time, the first trip part is separated from the contact surface, the current is disconnected, the other end pushes up the transmission plate 134, at this time, the rotating transmission plate 134 also forms a lever structure, after one end of the transmission plate 134 is pushed up, the other end pulls the switch 140 to rotate, because the outer shell 110 is provided with a switch slot 1142 corresponding to the switch 140, the switch 140 is rotatably connected to the switch slot 1142, a conductive ring 141 is disposed between the switch 140 and the transmission plate 134, the transmission plate 134 pulls the switch 140 to rotate through the conductive ring 141 to implement a trip operation, and when the circuit is repaired, the toggle switch 140 connects the first trip portion to the corresponding contact surface.

Secondly, when the line load is too large, the temperature rises, the thermal trip plate 136 is heated and deformed, the driving plate 134 is provided with a stress plate 135 at one end corresponding to the second trip portion, it should be noted that the deformed thermal trip plate 136 is bent towards the side where the stress plate 135 is located, the bent thermal trip plate 136 presses the stress plate 135, the second trip portion of the driving plate 134 can be separated from the corresponding contact surface by using the lever principle to realize the disconnection of the current, and the rotating driving plate 134 drives the switch 140 to rotate through the conductive ring 141 as the tripping principle of the switch 140.

In view of the above-mentioned principle, the way of rotationally connecting the releasing plate 132 and the driving plate 134 with the outer housing 110, and the way of fixedly connecting the positive contact plate 131, the coil 1331, the thermal releasing plate 136, and the negative contact plate 137 with the outer housing 110, it is disclosed herein that please refer to fig. 6, an installation seat 111, a support seat 112, and a rotating shaft 113 are disposed on one of the outer housings 110 in the accommodating chamber 100A, the coil 1331 is supported and fixed by the support seat 112, the positive contact plate 131, the thermal releasing plate 136, and the negative contact plate 137 are fixed by the installation seat 111, the number of the installation seat 111 and the number of the support seat 112 are set according to the installation situation, the rotating connection between the releasing plate 132 and the driving plate 134 are both provided with the rotating shaft 113, and the rotation of the releasing plate 132 and the driving plate 134 is realized by rotationally connecting with the rotating shaft 113.

Referring to fig. 8, in the third embodiment, the outer case 110 protrudes to a side where the switch 140 is located to form a protrusion 114, after the circuit breaker is installed, a heat releasing slot 1141 is formed on a top of the protrusion 114, and a switch slot 1142 is formed on a side where the protrusion 114 protrudes, the embodiment further discloses a heat releasing assembly 150, the heat releasing assembly 150 includes a cover plate 151 and a pull ring 152, a limiting plate 1143 is disposed on a heat releasing slot 1141 of one outer case 110 of the two outer cases 110, an adapter 1144 is disposed on a heat releasing slot 1141 of the other outer case 110, and both the limiting plate 1143 and the adapter 1144 are disposed on a side where the heat releasing slot 1141 protrudes from the protrusion 114, after the two outer cases 110 are connected, the limiting plate 1143 and the adapter 1144 form an adapter rotatably connected to the cover plate 151, and the switch 140 is connected to the pull ring 152, the cover plate 151 is lifted up by the spring 142 when the switch 140 is tripped.

In use, an isolation cover 1145 is disposed outside the heat releasing slot 1141, and a flow guiding channel is formed outside the heat releasing slot 1141 through the isolation cover 1145, so as to ensure that the flow guiding channel is always disposed outside the heat releasing slot 1141 after the circuit breaker is installed, and is not limited by the installation environment, and the flow guiding channel guides the released heat, please refer to fig. 10, which discloses a first embodiment of the sealing plate 151: when the switch 140 is tripped due to a short circuit, the electromagnetic trip rod 1332 is retracted (in the direction of arrow a in fig. 10), the pressure-operated trip plate 132 rotates (in the direction of arrow b in fig. 10), the driving plate 134 is jacked up to rotate in the direction of arrow c by using the lever principle, the driving plate 134 rotating in the same way drives the switch 140 to rotate (in the direction of arrow d in fig. 10) through the conductive ring 141, and then the switch 140 trips upward, and the force generated by the trip acts on the sealing plate 151 through the pull ring 152 to jack up the sealing plate 151 (in fig. 10, the arrow e is the rotating direction of the jacked-up sealing plate 151), so that the heat release slot 1141 is opened, and the heat in the accommodating chamber 100A is rapidly discharged from the flow guide channel through the heat release slot 1141, the arrow in the dotted line in fig. 10 is the heat release direction, and the force generated by the sealing plate 151 is buffered, so as to avoid the damage of the transmission component in the trip process;

referring now to fig. 11, a second embodiment of the sealing plate 151 is disclosed: the temperature of the negative contact plate 137 is increased due to a load to trip, that is, the negative contact plate 137 is affected by a high temperature and bends toward the side of the force-receiving plate 135 (the direction indicated by the arrow f in fig. 11), then the force-receiving plate 135 is pressed, the force-receiving plate 135 drives the driving plate 134 to rotate (the direction indicated by the arrow d in fig. 11), and the driving plate 134 rotating in the same way drives the switch 140 to rotate through the conductive ring 141, and then the sealing plate 151 is jacked up, which is different from the first embodiment in that the embodiment can control the jacked-up state of the sealing plate 151 according to the deformation condition of the negative contact plate 137 when the temperature is higher, that is, the deformation amount of the negative contact plate 137 is larger, the jacked-up height of the sealing plate 151 is higher, and the heat release capacity of the heat release groove 1141 to release heat is higher;

considering that the temperature is increased when the short circuit occurs, there is a third embodiment, please refer to fig. 12, which first rapidly jacks up the sealing plate 151 according to the first embodiment, and then controls the height of the sealing plate 151 that is jacked up according to the temperature rise.

In the fourth embodiment, in order to improve the sealing performance of the sealing plate 151 on the heat releasing groove 1141, please refer to fig. 9, an outer sealing ring 1511 is disposed at the bottom of the conductive ring 141 near the outer edge, an inner plate 1512 is disposed in the outer sealing ring 1511, an inner sealing ring 1513 is disposed outside the inner plate 1512, after the sealing plate 151 and the heat releasing groove 1141 are closed, the outer sealing ring 1511 is sealed once, and then the inner plate 1512 cooperates with the inner edge of the heat releasing groove 1141 to extrude the inner sealing ring 1513 to form two seals, so as to improve the sealing strength by two seals.

In addition, referring to fig. 13, a buffering member 1146 is movably disposed between the isolation cover 1145 and the sealing plate 151, and the buffering member 1146 is a flexible elastic structure, such as: the cooperation of spring and telescopic link, that is to say, through the effect of bolster 1146 improves the intensity that shrouding 151 and protruding portion 114 laminated, further improves the leakproofness to heat release groove 1141, in addition, can also utilize bolster 1146 to realize further buffering, protects transmission parts such as switch 140.

In a fifth embodiment, referring to fig. 14, in order to further release the heat in the accommodating chamber 100A, a partition 115 is disposed at a side of the accommodating chamber 100A opposite to the protrusion 114, a flow cavity is isolated between the partition 115 and the outer casing 110, a through hole 1151 is disposed on a side wall of the outer casing 110 corresponding to the flow cavity, and the through hole 1151 accelerates the flow of the air flow, so as to release the heat.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a high voltage circuit breaker for electric wire netting distribution system, its includes circuit breaker body (100), circuit breaker body (100) includes two shell bodys (110), and two shell bodys (110) make up and form accommodation chamber (100A), the periphery of accommodation chamber (100A) is provided with two wiring subassemblies (120), and one of them is connected with the positive terminal that the external world inserts, and another is connected with the negative terminal that the external world inserts, the position that lies in between two wiring subassemblies (120) in accommodation chamber (100A) is provided with trigger assembly (130) and switch (140), communicates two wiring subassemblies (120) the positive and negative terminal that insert through trigger assembly (130) for trigger switch (140) trip, its characterized in that: a heat release groove (1141) capable of conducting air circulation is arranged outside the outer shell (110), a heat release assembly (150) is arranged on the heat release groove (1141), and the opening and closing degree of the heat release assembly (150) and the heat release groove (1141) is controlled by a switch (140).

2. The high voltage circuit breaker of claim 1, wherein: the wiring assembly (120) comprises an inlet pipe (121) and a contact terminal (122), the inlet pipe (121) and the contact terminal (122) are arranged on the same outer shell (110), and the wiring terminal penetrates into the accommodating chamber (100A) through the inlet pipe (121) and contacts with the contact terminal (122).

3. The high voltage circuit breaker of claim 2, wherein: the contact terminal (122) is fixedly arranged on the outer shell (110) installed on the wire inlet pipe (121), and the fixedly arranged contact terminal (122) is close to the wire inlet pipe (121) so as to guide the wire inlet end through the wire inlet pipe (121) and enable the wire inlet end to be in contact with the end part of the contact terminal (122).

4. The high voltage circuit breaker of claim 2, wherein: the contact terminal (122) comprises a head (1221), a threaded rod (1222) and a threaded pipe (1223), the threaded pipe (1223) is fixedly connected with an outer shell (110) installed on the inlet pipe (121), the threaded rod (1222) is in threaded connection with the threaded pipe (1223), the head (1221) is arranged at one end, located in the accommodating chamber (100A), of the threaded rod (1222), and the head (1221) is used for being in contact with the contact terminal.

5. The high voltage circuit breaker of claim 1, wherein: trigger subassembly (130) are including just touching electroplax (131) and negatively touching electroplax (137), just touch electroplax (131) and insert anodal touch line end (122) and be connected, negatively touch electroplax (137) and insert the negative touch line end (122) and be connected, just touch electroplax (131) and negatively touch and be provided with tripping group and electromagnetism dropout (133) between electroplax (137), wherein:

the tripping group and the electromagnetic tripping piece (133) are matched with the positive contact plate (131) and the negative contact plate (137) to guide current, so that the current output by the positive terminal enters the negative terminal.

6. The high voltage circuit breaker of claim 5, wherein: the trip group is including taking off board (132), driving plate (134) and hot trip board (136), the one end of taking off board (132) with just touch electric board (131) contact and form first trip portion, the other end and driving plate (134) contact formation second trip portion, wherein:

the electromagnetic release piece (133) comprises a coil (1331), the transmission plate (134) is connected with the coil (1331) through a lead, and the coil (1331) is connected with the thermal release plate (136) through a lead;

an electromagnetic trip rod (1332) is arranged in the coil (1331), the trip plate (132) and the transmission plate (134) are rotatably connected with the outer shell (110), a through hole (1321) is formed in the trip plate (132) on the telescopic path of the electromagnetic trip rod (1332), the telescopic end of the electromagnetic trip rod (1332) penetrates through the through hole (1321), a pressing cap (1333) is arranged at the end part, and the pressing cap (1333) presses the trip plate (132) when the electromagnetic trip rod (1332) contracts;

the driving plate (134) is provided with stress plate (135) for the one end of second trip portion, hot trip plate (136) are heated and are bent to stress plate (135) place side, and the stress plate (135) is pressed to hot trip plate (136) of buckling.

7. The high voltage circuit breaker of claim 6, wherein: a switch groove (1142) is formed in the position, corresponding to the switch (140), of the outer shell (110), the switch (140) is rotatably connected with the switch groove (1142), and a transmission ring (141) is arranged between the switch (140) and the transmission plate (134).

8. The high voltage circuit breaker of claim 1, wherein: the outer shell (110) protrudes to one side where the switch (140) is located to form a protruding portion (114), and after the circuit breaker is installed, the heat releasing groove (1141) is formed in the top of the protruding portion (114).

9. The high voltage circuit breaker of claim 8, wherein: the heat release assembly (150) comprises a sealing plate (151) and a pull ring (152), a limiting plate (1143) is arranged on a heat release groove (1141) of one outer shell (110) in the two outer shells (110), an adapter frame (1144) is arranged on a heat release groove (1141) of the other outer shell (110), the limiting plate (1143) and the adapter frame (1144) are both arranged on one side, protruding relative to the protruding part (114), of the heat release groove (1141), after the two outer shells (110) are connected, an adapter part rotatably connected with the sealing plate (151) is formed by the limiting plate (1143) and the adapter frame (1144), the pull ring (152) is arranged between one side, corresponding to the adapter, of the sealing plate (151) and the switch (140), and the sealing plate (151) and the switch (140) are movably connected through the pull ring (152).

10. The high voltage circuit breaker of claim 9, wherein: an isolation cover (1145) is arranged outside the heat release groove (1141), and a flow guide channel is formed outside the heat release groove (1141) through the isolation cover (1145).