CN218333672U - Blasting type circuit breaker with arc extinguishing grids - Google Patents

Abstract

The utility model relates to an explosion type circuit breaker with an arc extinguishing grid, which comprises a shell, a base and on-off metal, wherein the bottom of the shell is provided with an opening, the base is connected with the opening end of the bottom of the shell, the on-off metal is clamped and fixed by the shell and the base, and an explosion assembly is arranged on the base; the shell and the on-off metal jointly form an arc extinguishing cavity, a first groove and a second groove are arranged on the upper surface of the on-off metal, the on-off metal between the first groove and the second groove is a swing section, the position of the first groove corresponds to the position of the blasting assembly, and a middle seat is arranged in the arc extinguishing cavity; well seat includes arc extinguishing portion and exhaust portion, the bottom opening of arc extinguishing portion, and arc extinguishing portion is provided with a plurality of arc extinguishing bars, and a plurality of arc extinguishing bars are parallel ground interval distribution each other, are provided with the interval that supplies the swing section swing to pass through between arc extinguishing bar bottom and the break-make metal, and the straight line at first groove length direction place is all parallel with every arc extinguishing bar. The circuit breaker provided by the invention has the advantages of high response speed, safety and reliability.

Description

Blasting type circuit breaker with arc extinguishing grids

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to blasting formula circuit breaker with arc extinguishing bars.

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 for a predetermined time. Circuit breakers may be used in a variety of electrical circuits to selectively interrupt the flow of current to or from an energy storage device. For example: the battery pack of the electric vehicle may be protected by a circuit breaker.

At present, the general application of domestic market in the field of electric automobiles is a fuse type circuit breaker, which is fused through a control system to achieve the purpose of power-off protection. It has the following disadvantages:

firstly, the fusing speed is slow, and the response is not timely enough;

(ii) as OEMs are manufacturing vehicle models with greater power, greater range and fast charging, that require higher voltage platforms (800-1000 VDC), the fused circuit breakers will require larger volumes and take up more space;

(III) insufficient safety:

(1) Since the high-voltage circuit of a vehicle presents a pulsed overload current once, for example at the instant of switching on/off of the circuit, which is generally of short duration, with frequent use of the vehicle, the pulsed current will in many cases occur thousands of times throughout the use of the device, causing premature fatigue failure of the fuse, which may be interrupted at certain times even under normal operating conditions;

(2) When the electric automobile is accidentally collided, high-voltage parts of the metal shell are very easy to extrude and deform, and after the deformed metal shell of the electric device is contacted with the high-voltage copper bar, the dangerous conditions such as short circuit, fire or electric shock of personnel can be caused;

currently, in order to solve the above problem (2), two schemes are generally adopted:

the first scheme is as follows: after the automobile collides, the collision sensor sends a collision signal to an electric control unit which is responsible for controlling the high-voltage contactor, the electric control unit sends a power-off signal to the high-voltage distribution system after receiving a collision instruction, and a high-voltage loop is cut off by disconnecting the contactor; however, there are two risks associated with solution one: a. before the electronic control unit reacts, a danger has already occurred; b. in the vehicle collision process, the intelligent judgment system cannot complete the whole logic judgment and power-off action because a signal line or a power supply line is damaged.

Scheme two is as follows: a fuse is added in a vehicle power supply circuit, and the high-voltage circuit fuse is expected to be disconnected when short circuit occurs after collision; the risk of the scheme is that when the incomplete short circuit occurs, the collision causes that the high-voltage anode and the high-voltage cathode are connected to an equivalent heating impedance, and the local heating is carried out within the current range allowed by the fuse, so that the fire of the whole vehicle is caused.

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved

To the not enough among the prior art, the utility model provides a blasting formula circuit breaker with arc extinguishing bars to solve one or more problems among the prior art.

(II) technical scheme

In order to realize the purpose, the technical scheme of the invention is as follows:

the blasting type circuit breaker with the arc extinguishing grid comprises a shell, a base and on-off metal, wherein the bottom of the shell is provided with an opening, the base is connected with the opening end of the bottom of the shell, the on-off metal is clamped and fixed by the shell and the base, and a blasting assembly is arranged on the base;

the shell and the on-off metal jointly form an arc extinguishing cavity, a first groove and a second groove are formed in the on-off metal, the on-off metal between the first groove and the second groove is a swing section, the position of the first groove corresponds to the position of the blasting assembly, and a middle seat is arranged in the arc extinguishing cavity; the well seat includes arc extinguishing portion and exhaust portion, the bottom opening of arc extinguishing portion, arc extinguishing portion is provided with a plurality of arc chutes, and is a plurality of the arc chutes parallel ground interval distribution of each other, be provided with the interval that supplies the swing section swing to pass through between arc chute bottom and the break-make metal, the straight line at first groove length direction place is all parallel with every arc chute.

Furthermore, one first groove is arranged, two second grooves are arranged, the first groove is positioned between the two second grooves, and the first groove and the second grooves are both positioned in the arc extinguishing cavity; the blasting subassembly includes blasting chamber, retainer plate and ignition, the blasting chamber is seted up at the base upper surface, ignition and retainer plate all set up at the blasting intracavity, the ignition includes blasting end and ignition end, the blasting end is inserted and is established in the retainer plate, the position of blasting end corresponds with the position in first groove, the top and the break-make metal of retainer plate are contradicted, the break-make metal compresses tightly the ignition through the extrusion retainer plate and fixes in the blasting intracavity, set up the interval between blasting end and the break-make metal, the inside fuel that detonates that sets up of blasting end, the control system electric connection of circuit that the ignition end passes through wire and circuit ware and locates the circuit.

Furthermore, the arc-extinguishing grids are arranged and distributed, then the bottom connecting lines are arc-shaped, and the top points of the arc-shapes correspond to the positions of the first grooves.

Further, the bottom of arc extinguishing bars is provided with the arc extinguishing incision, the arc extinguishing incision includes U type incision and V type incision, the V type incision is located U type notched top position.

Furthermore, the inner wall of the shell above the arc-extinguishing grid is provided with two air guide arc surfaces which are connected with each other, the position of a connecting line of the two air guide arc surfaces corresponds to the first groove, and the heights of the two ends, far away from each other, of the two air guide arc surfaces are higher than the height of the connecting end.

Further, arc extinguishing portion is provided with one, exhaust portion is provided with two, the portion of extinguishing arc is located between two exhaust portions, one side that exhaust portion is close to shells inner wall is provided with a plurality of pressure release passageways, pressure release passageway is separated by the baffle that sets up a plurality of interval evenly distributed on exhaust portion and is formed, the one end of pressure release passageway and the regional intercommunication of arc chute top, a plurality of pressure release holes have been seted up to the position that corresponds pressure release passageway on the casing.

Furthermore, the inner wall of the shell is provided with filter cotton at a position corresponding to the pressure relief channel, and the filter cotton covers all the pressure relief holes.

Furthermore, each pressure relief channel is internally provided with a splitter plate, the splitter plates are arranged in parallel with the clapboards, and the splitter plates are arranged at the central positions of the two adjacent clapboards.

Furthermore, two groups of protection assemblies are arranged on the inner wall of the opening at the bottom end of the arc extinguishing part, and each protection assembly comprises two limiting blocks and two blocking plates; the two limiting blocks are respectively positioned on two vertical inner walls, the bottom end opening of the arc extinguishing part is vertical to the first groove, the distance between the two limiting blocks is 1-2mm smaller than the width of the corresponding part of the swing section, and the two limiting blocks are used for clamping the swing section which swings after blasting; the two blocking plates are vertically arranged in parallel, the blocking plates are arranged on the vertical inner wall of the bottom opening of the arc extinguishing part parallel to the first groove, and the blocking plates are used for preventing the swinging section swinging after blasting from colliding with the middle seat; and the two groups of protection assemblies are respectively used for protecting two swing sections for switching on and off metal after explosion.

Furthermore, the distance between the two second grooves is not less than the minimum safe isolation distance of the circuit voltage where the circuit breaker is located.

(III) advantageous technical effects

To sum up, the utility model discloses a following beneficial technological effect:

1. when the metal arc extinguishing device is used, the blasting assembly explodes at first to blast the on-off metal from the position of the first groove, so that the purpose of cutting off current is achieved, then under the impact of explosion, the two swinging sections rotate upwards around the position of the second groove to enter the arc extinguishing cavity, along with the rotation of the two swinging sections in the direction away from each other, electric arcs generated at the fracture positions of the on-off metal are stretched by the two swinging sections, and vertical and upward shock waves are generated due to explosion, so that the electric arcs are blown into arcs and move upwards to the positions of the arc extinguishing grids to be cut into sections by the arc extinguishing grids, and the purpose of arc extinguishing is achieved; the blasting assembly, the electric arc generating position and the arc-extinguishing grid are positioned on the same vertical line, so that the electric arc is blown into the arc-extinguishing grid immediately after being generated to complete arc extinguishing, the electric arc is prevented from leaking, and the device has the advantages of quick response, high efficiency and rapidness in arc extinguishing, safety, stability and reliability;

2. the explosion assembly comprises an explosion cavity, a fixed ring and an ignition tool, the explosion cavity is formed in the upper surface of the base, the ignition tool and the fixed ring are arranged in the explosion cavity, the ignition tool comprises an explosion end and an ignition end, the explosion end is inserted into the fixed ring, the position of the explosion end corresponds to that of the first groove, the top of the fixed ring is abutted against the on-off metal, the on-off metal tightly presses and fixes the ignition tool in the explosion cavity by extruding the fixed ring, a gap is formed between the explosion end and the on-off metal, the inside of the explosion end is provided with ignition fuel, and the ignition end is electrically connected with a control system of a circuit where the circuit device is located through a lead; therefore, when danger occurs, the control system transmits a signal to the ignition end of the igniter, so that the explosion end of the igniter explodes, and the impact generated by explosion can directly act on the position of the first groove, thereby facilitating the on-off metal to be quickly disconnected from the first groove to cut off a circuit;

3. because the bottom connecting lines are arc-shaped after the arc-extinguishing grids are arranged and distributed, and the top points of the arc-shaped connecting lines correspond to the positions of the first grooves, after explosion occurs, the arc generated at the break-make metal fracture part can also form an arc under the stretching of the two swing sections and the impact of explosion gas, so that the arc-extinguishing grids can conveniently perform synchronous arc extinguishing on each position of the arc-shaped arc, and the arc-extinguishing efficiency and the arc-extinguishing effect are improved;

4. because the bottom of the arc-extinguishing grid is provided with the arc-extinguishing notch, the arc-extinguishing notch comprises a U-shaped notch and a V-shaped notch, and the V-shaped notch is positioned at the top end of the U-shaped notch, the arc can be cut off again after being cut off, and the purposes of quick extinguishing and discharging are achieved;

5. because the inner wall of the shell above the arc-extinguishing grid is provided with the air guide cambered surfaces, the two air guide cambered surfaces are connected, the connecting line of the two air guide cambered surfaces corresponds to the first groove, the heights of the ends, far away from each other, of the two air guide cambered surfaces are higher than the height of the connecting end, through the arrangement, high-pressure gas generated by explosion can contact with the air guide cambered surfaces after passing through the arc-extinguishing grid, the air guide cambered surfaces respectively guide the high-pressure gas to two opposite directions, so that the impact of the high-pressure gas on the top surface of the shell is reduced, and the effects of pressure relief and protection are achieved;

6. because the side of the exhaust part of the middle seat close to the inner wall of the shell is provided with a plurality of pressure relief channels, the pressure relief channels are formed by a plurality of partition plates which are uniformly distributed at intervals and arranged on the exhaust part, one end of each pressure relief channel is communicated with the area above the arc extinguishing gate, and a plurality of pressure relief holes are formed in the shell corresponding to the pressure relief channels; through the arrangement, the air guide cambered surfaces can respectively guide high-pressure air into the pressure relief channels of the two exhaust parts of the middle seat, and the high-pressure air can be shunted due to the arrangement of the pressure relief channels, so that the pressure relief effect is achieved, and the high-pressure air can be finally discharged out of the shell through the pressure relief holes after entering the pressure relief channels;

7. the filter cotton is arranged on the inner wall of the shell corresponding to the pressure relief channel and covers all the pressure relief holes, so that the filter cotton can prevent fine particulate matters generated by explosion from flying out of the shell from the pressure relief holes;

8. because the flow distribution plate is arranged in each pressure relief channel, the flow distribution plate is arranged in parallel with the partition plates, and the flow distribution plate is arranged at the central position of two adjacent partition plates, the flow distribution plate can cut the gas in the pressure relief channel into finer gas flow, and the pressure relief effect is further improved;

9. because the inner wall of the bottom opening of the arc extinguishing part is provided with two groups of protection components, each protection component comprises two limiting blocks and two baffle plates; the two limiting blocks are respectively positioned on two vertical inner walls, the bottom end opening of the arc extinguishing part is vertical to the first groove, the distance between the two limiting blocks is 1-2mm smaller than the width of the corresponding part of the swing section, and the two limiting blocks are used for clamping the swing section which swings after blasting; the two blocking plates are vertically arranged in parallel, the blocking plates are arranged on the vertical inner wall of the bottom opening of the arc extinguishing part parallel to the first groove, and the blocking plates are used for preventing the swinging section swinging after blasting from colliding with the middle seat; through the arrangement, after the explosion happens, the two swinging sections can be respectively driven to the positions of the limiting blocks corresponding to the two swinging sections, and under the impact of the explosion, the swinging sections can be clamped by the two limiting blocks arranged oppositely or pass through the two limiting blocks arranged oppositely, so that the danger caused by the accidental contact of the two swinging sections after the swinging back happens is avoided; in addition, the setting of separation plate can avoid swing section rotation range too big and take place the striking with well seat, plays the effect of protection well seat.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram illustrating an overall structure of a blast circuit breaker having an arc chute according to an embodiment;

fig. 2 is a vertical sectional view of a blast-type circuit breaker having an arc chute according to an embodiment;

FIG. 3 is a schematic view of the structure of the arc chute in the embodiment;

FIG. 4 is a schematic diagram of a positional relationship between a switching metal and an arc chute in an embodiment;

FIG. 5 is a schematic diagram showing a positional relationship between the on-off metal and the arc chute after blasting breakage in the embodiment;

FIG. 6 is a schematic structural diagram of the embodiment in a state where the middle base is connected to the arc chute;

FIG. 7 is a schematic view of a structure for embodying a pressure relief channel;

FIG. 8 is a top view of the center seat in the embodiment;

fig. 9 is a bottom view of the middle seat in the embodiment.

Description of reference numerals:

in the figure, 1, a housing; 2. a base; 3. switching on and off the metal; 4. a blasting chamber; 5. a fixed ring; 6. an igniter; 61. a blasting end; 62. an ignition end; 7. an arc extinguishing chamber; 8. a first groove; 9. a second groove; 10. a swing section; 11. a middle seat; 111. an arc extinguishing part; 112. an exhaust section; 12. an arc chute; 13. an arc extinguishing notch; 131. a U-shaped notch; 132. a V-shaped cut; 14. an air guide arc surface; 15. a pressure relief channel; 16. a partition plate; 17. a pressure relief vent; 18. filtering cotton; 19. a flow distribution plate; 20. a limiting block; 21. a barrier plate; 22. a clamping groove.

Detailed Description

In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only partial embodiments of the present application, but not all 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 application.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the application described herein may be used. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In this application, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "middle", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the present application and its embodiments, and are not used to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in this application will be understood by those of ordinary skill in the art as the case may be.

In addition, the term "plurality" shall mean two as well as more than two.

It should be noted that, in the present application, the embodiments and features of the embodiments may be combined with each other without conflict. The present application will be described in detail below with reference to the embodiments with reference to the attached drawings.

The embodiment is as follows:

referring to fig. 1 to 9, in order to disclose a blasting type circuit breaker with an arc chute, the blasting type circuit breaker comprises a housing 1, a base 2 and a break-make metal 3. The bottom opening of casing 1, the open end of base 2 and casing 1 bottom passes through bolted connection, and break-make metal 3 is pressed from both sides tightly fixedly by casing 1 and base 2, is provided with the blasting subassembly on the base 2.

The shell 1 and the on-off metal 3 jointly form an arc extinguishing chamber 7, the upper surface of the on-off metal 3 is provided with a first groove 8 and two second grooves 9, the first groove 8 and the second grooves 9 are both positioned in the arc extinguishing chamber 7, the first groove 8 is positioned at the midpoint positions of the two second grooves 9 and is positioned at the midpoint position in the length direction of the whole on-off metal 3, the on-off metal 3 between the first groove 8 and the second grooves 9 is a swing section 10, the position of the first groove 8 corresponds to the position of the blasting assembly, a middle seat 11 is arranged in the arc extinguishing chamber 7, and the middle seat 11 is clamped and fixed by the on-off metal 3 and the shell 1.

Well seat 11 includes an arc extinguishing portion 111 and two exhaust portion 112, and arc extinguishing portion 111 sets up between two exhaust portion 112, and the bottom opening of arc extinguishing portion 111, arc extinguishing portion 111 is provided with a plurality of arc bars 12, has seted up a plurality of draw-in grooves 22 on the arc extinguishing portion 111, and arc bar 12 realizes the joint through draw-in groove 22 and arc extinguishing portion 111 and fixes, and a plurality of arc bars 12 are parallel to each other and the interval distributes uniformly, and first groove 8 and second groove 9 all are located the below of arc bar 12 is provided with the interval that supplies the swing section 10 swing to pass through between arc bar 12 bottom and the break-make metal 3, and the straight line at first groove (8) length direction place is all parallel with every arc bar (12).

The blasting assembly comprises a blasting chamber 4, a retainer ring 5 and an igniter 6. Blasting chamber 4 is seted up at base 2 upper surface, and ignition ware 6 and retainer plate 5 all set up in blasting chamber 4. The igniter 6 comprises a blasting end 61 and an igniting end 62, wherein the blasting end 61 is internally provided with detonating fuel which mainly comprises but is not limited to the following components: zirconium powder, potassium perchlorate, fluororubber, sodium methyl cellulose, aluminum powder and the like. The blasting end 61 is inserted in the retainer ring 5, the position of the blasting end 61 corresponding to the position of the first groove 8. The top of retainer plate 5 is contradicted with break-make metal 3, and break-make metal 3 compresses tightly the ignition tool 6 through extrusion retainer plate 5 and fixes in blasting chamber 4, sets up the interval between blasting end 61 and the break-make metal 3, avoids the explosion directly to explode break-make metal 3. The firing end 62 is electrically connected to the control system of the circuit in which the circuit is located through a wire.

When the circuit breaker provided by the embodiment is applied to an electric automobile, the switching metal 3 is connected into a circuit of the electric automobile, the ignition end 62 of the igniter 6 is connected with an electric control system of the electric automobile, and triggering conditions such as collision, high temperature, overload and the like are set in the electric control system of the electric automobile, when the above-mentioned unexpected situation occurs, the electric control system transmits a signal to the igniter 6 to detonate the igniter 6, the switching metal 3 can be burst off from the position of the first groove 8, so as to achieve the purpose of cutting off current, then under the impact of explosion, the two swing sections 10 can rotate upwards around the position of the second groove 9 to enter the arc extinguishing chamber 7, along with the rotation of the two swing sections 10 in the direction away from each other, the arc generated at the fracture part of the switching metal 3 can be stretched by the two swing sections 10, and because the explosion generates a vertical upward impact wave, the arc can be blown into an arc shape and simultaneously moves upwards to the position of the arc extinguishing grid 12 to be cut into sections by the arc extinguishing grid 12, so as to achieve the purpose of switching; wherein, because blasting subassembly, electric arc produce the position and arc chute 12 are located same vertical line, consequently can be blown into the completion arc extinguishing in arc chute 12 immediately after the electric arc produces to prevent that electric arc from leaking outward, the circuit breaker that consequently this embodiment provided has the advantage that the response is rapid, safe and stable is reliable.

In order to ensure the safety of the whole circuit after the on-off metal 3 is broken and exploded, the distance between the two second grooves 9 is not less than the minimum safe isolation distance of the circuit voltage where the circuit breaker is located, in this embodiment, the distance between the two second grooves 9 is not less than the minimum safe isolation distance of the circuit voltage of the electric vehicle.

In addition, the arc-extinguishing grids 12 are arranged and distributed, and then the bottom connecting line is arc-shaped, and the top point of the arc corresponds to the position of the first groove 8. Through the arrangement, after the explosion happens, the arc generated at the fracture part of the on-off metal 3 can also form an arc shape (as shown by a dotted line in fig. 5) under the stretching of the two swing sections 10 and the impact of explosion gas, so that the arc extinguishing grid 12 can synchronously extinguish the arc at each position of the arc-shaped arc, and the arc extinguishing efficiency and the arc extinguishing effect are improved.

The bottom of the arc chute 12 is provided with an arc chute 13, the arc chute 13 comprises a U-shaped notch 131 and a V-shaped notch 132, and the V-shaped notch 132 is positioned at the top end of the U-shaped notch 131. Through the arrangement, the arc can be cut off again after being cut off, so that the aims of quick extinguishing and discharging are fulfilled. Here, the edge of the open end of the U-shaped notch 131 and the bottom edge of the arc chute 12 are disposed in a sharp corner shape, so as to form a point discharge, which is beneficial to rapid arc extinction.

Further, the inner wall of the shell 1, which is located above the arc chute 12, is provided with two air guide arc surfaces 14, the two air guide arc surfaces 14 are connected with each other, the position of the connecting line of the two air guide arc surfaces 14 corresponds to the first groove 8, and the height of one end, away from each other, of the two air guide arc surfaces 14 is higher than that of the connecting end. Through the arrangement, high-pressure gas generated by explosion can contact with the gas guide cambered surface 14 after passing through the arc chute 12, the gas guide cambered surface 14 guides the high-pressure gas to flow in two opposite directions respectively, so that the impact of the high-pressure gas on the top surface of the shell 1 is reduced, the effects of pressure relief and protection are achieved, the gas guide cambered surface 14 guides the high-pressure gas to the exhaust part 112 of the middle seat 11, and the high-pressure gas is subjected to pressure relief and exhaust.

One side of the exhaust part 112 of the middle seat 11, which is close to the inner wall of the casing 1, is provided with a plurality of pressure relief channels 15, the pressure relief channels 15 are formed by separating a plurality of partition plates 16 which are uniformly distributed at intervals and arranged on the exhaust part 112, one end of each pressure relief channel 15 is communicated with an area above the arc chute 12, and a plurality of pressure relief holes 17 are formed in the casing 1 corresponding to the positions of the pressure relief channels 15. Through the above arrangement, the air guide arc surface 14 can guide high-pressure air into the pressure relief channels 15 of the two exhaust parts 112 of the middle seat 11 respectively, and the pressure relief channels 15 are provided with a plurality of pressure relief channels, so that the high-pressure air can be shunted, the pressure relief effect is achieved, and after the high-pressure air enters the pressure relief channels 15, the high-pressure air can be finally discharged out of the shell 1 through the pressure relief holes 17.

Further, all be provided with flow distribution plate 19 in every pressure release channel 15, flow distribution plate 19 and 16 parallel arrangement of baffle, flow distribution plate 19 sets up the central point at two adjacent baffles 16 and puts, therefore flow distribution plate 19 can cut into more tiny air current with the gas in the pressure release channel 15, further improves the pressure release effect.

In addition, the inner wall of the casing 1 is provided with a filter cotton 18 at a position corresponding to the pressure relief channel 15, and the filter cotton 18 covers all the pressure relief holes 17. The filter cotton 18 is a novel inorganic insulating refractory material, including but not limited to, being composed of aluminum-Karan fiber, produced by using special textile technology and equipment, and the physical and chemical properties can be restored as before after drying. By the arrangement, the filter cotton 18 can prevent fine particles generated by explosion from flying out of the shell 1 from the pressure relief hole 17.

Finally, two sets of protection components are arranged on the inner wall of the bottom opening of the arc extinguishing part 111. The protection assembly comprises two stop blocks 20 and two barrier plates 21. The two limiting blocks 20 are respectively positioned on two vertical inner walls of the bottom opening of the arc extinguishing part 111, which are perpendicular to the first groove 8, the limiting blocks 20 are plastic blocks with certain elasticity and hardness, the distance between the two limiting blocks 20 is 1-2mm smaller than the width of the corresponding part of the swing section 10, and the two limiting blocks 20 are used for clamping the swing section 10 which swings after blasting. The two blocking plates 21 are vertically arranged in parallel, the blocking plates 21 are arranged on the vertical inner wall of the bottom opening of the arc extinguishing part 111 parallel to the first groove 8, and the blocking plates 21 are used for preventing the swinging section 10 swinging after blasting from colliding with the middle seat 11; the two groups of protection components are respectively used for protecting the two swing sections 10 of the on-off metal 3 after the explosion happens.

Through the aforesaid setting, the explosion takes place the back, and two swing sections 10 can drive respectively to the position with stopper 20 that corresponds separately to under the impact of explosion, swing section 10 can be blocked or pass from between two stopper 20 that set up relatively by stopper 20 that set up relatively, thereby avoid two swing sections 10 to take place unexpected contact after the backswing and cause danger. In addition, the blocking plate 21 can prevent the swing section 10 from impacting the middle seat 11 due to too large rotation amplitude, and the effect of protecting the middle seat 11 is achieved.

The working principle of the embodiment is as follows: when the explosion assembly receives a signal explosion, the on-off metal 3 can be exploded from the position of the first groove 8, so that the purpose of cutting off current is achieved, then under the impact of the explosion, the two swing sections 10 can rotate upwards around the position of the second groove 9 to enter the arc extinguishing cavity 7, along with the rotation of the two swing sections 10 in the direction away from each other, the electric arc generated at the fracture position of the on-off metal 3 can be stretched by the two swing sections 10, and vertical and upward shock waves are generated due to the explosion, so that the electric arc can be blown into an arc shape and simultaneously moves upwards to the position of the arc extinguishing grid 12 to be cut into sections by the arc extinguishing grid 12, so that the purpose of arc extinguishing is achieved, and high-pressure gas generated by the explosion can be discharged out of the shell 1 through the pressure release hole 17; wherein, because blasting subassembly, electric arc produce the position and arc chute 12 are located same vertical line, consequently can be blown into the completion arc extinguishing in arc chute 12 immediately after the electric arc produces to prevent that the electric arc from leaking outward, the circuit breaker that consequently this embodiment provided has the advantage that the response is rapid, safe and stable is reliable.

It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.

Claims (10)

1. The utility model provides a blasting formula circuit breaker with arc chute which characterized in that: the explosion-proof device comprises a shell (1), a base (2) and on-off metal (3), wherein the bottom of the shell (1) is open, the base (2) is connected with the open end of the bottom of the shell (1), the on-off metal (3) is clamped and fixed by the shell (1) and the base (2), and an explosion assembly is arranged on the base (2);

the shell (1) and the on-off metal (3) jointly form an arc extinguishing chamber (7), a first groove (8) and a second groove (9) are formed in the on-off metal (3), the on-off metal (3) between the first groove (8) and the second groove (9) is a swing section (10), the position of the first groove (8) corresponds to the position of the blasting assembly, and a middle seat (11) is arranged in the arc extinguishing chamber (7); well seat (11) are including going out arc portion (111) and exhaust portion (112), the bottom opening of going out arc portion (111), it is provided with a plurality of arc extinguishing bars (12) to go out arc portion (111), and is a plurality of arc extinguishing bars (12) interval distribution parallelly connected each other, be provided with the interval that supplies swing section (10) swing to pass through between arc extinguishing bar (12) bottom and break-make metal (3), the straight line at first groove (8) length direction place is all parallel with every arc extinguishing bar (12).

2. The blasting circuit breaker with an arc chute according to claim 1, characterized in that there are one first slot (8) and two second slots (9), the first slot (8) being located between two second slots (9), the first slot (8) and the second slot (9) both being located in the arc extinguishing chamber (7); the blasting subassembly includes blasting chamber (4), retainer plate (5) and ignition utensil (6), blasting chamber (4) are seted up at base (2) upper surface, ignition utensil (6) and retainer plate (5) all set up in blasting chamber (4), ignition utensil (6) are including blasting end (61) and ignition end (62), blasting end (61) are inserted and are established in retainer plate (5), the position of blasting end (61) corresponds with the position of first groove (8), the top and the conflict of break-make metal (3) of retainer plate (5), break-make metal (3) compress tightly ignition utensil (6) through extrusion retainer plate (5) and fix in blasting chamber (4), set up the interval between blasting end (61) and break-make metal (3), the inside fuel that sets up of blasting end (61), ignition end (62) are through the control system electric connection of wire and the circuit that the ware was located.

3. The blast circuit breaker with an arc chute of claim 2, wherein: the arc-extinguishing grids (12) are arranged and distributed, then the connecting lines of the bottoms of the arc-extinguishing grids are arc-shaped, and the top points of the arc-shapes correspond to the positions of the first grooves (8).

4. The blast-type circuit breaker with an arc chute as claimed in claim 3, wherein: the bottom of arc extinguishing bars (12) is provided with arc extinguishing incision (13), arc extinguishing incision (13) are including U type incision (131) and V type incision (132), V type incision (132) are located the top position of U type incision (131).

5. The blast circuit breaker with an arc chute of claim 1, wherein: the inner wall of the shell (1) above the arc extinguishing grid (12) is provided with two air guide arc surfaces (14), the air guide arc surfaces (14) are connected, the position of a connecting line of the two air guide arc surfaces (14) corresponds to the first groove (8), and the heights of the two ends, far away from each other, of the air guide arc surfaces (14) are all higher than the height of the connecting end.

6. The blast circuit breaker with an arc chute of claim 5, wherein: arc extinguishing portion (111) is provided with one, exhaust portion (112) are provided with two, arc extinguishing portion (111) is located between two exhaust portion (112), one side that exhaust portion (112) are close to casing (1) inner wall is provided with a plurality of pressure release passageway (15), pressure release passageway (15) are separated by a plurality of interval evenly distributed's that set up on exhaust portion (112) baffle (16) and are formed, the one end of pressure release passageway (15) and the regional intercommunication of arc extinguishing bars (12) top, a plurality of pressure release holes (17) have been seted up to the position that corresponds pressure release passageway (15) on casing (1).

7. The blast circuit breaker with an arc chute of claim 6, wherein: the inner wall of the shell (1) is provided with filter cotton (18) at a position corresponding to the pressure relief channel (15), and all the pressure relief holes (17) are completely covered by the filter cotton (18).

8. The blast circuit breaker with an arc chute of claim 6, wherein: every all be provided with flow distribution plate (19) in pressure release passageway (15), flow distribution plate (19) and baffle (16) parallel arrangement, flow distribution plate (19) set up the central point at two adjacent baffles (16) and put.

9. The blast circuit breaker with an arc chute of claim 1, wherein: two groups of protection assemblies are arranged on the inner wall of the bottom opening of the arc extinguishing part (111), and each protection assembly comprises two limiting blocks (20) and two barrier plates (21); the two limiting blocks (20) are respectively positioned on two vertical inner walls, the opening at the bottom end of the arc extinguishing part (111) is vertical to the first groove (8), the distance between the two limiting blocks (20) is 1-2mm smaller than the width of the corresponding part of the swinging section (10), and the two limiting blocks (20) are used for clamping the swinging section (10) which swings after blasting; the two blocking plates (21) are vertically arranged in parallel, the blocking plates (21) are arranged on the vertical inner wall of the bottom end opening of the arc extinguishing part (111) in parallel with the first groove (8), and the blocking plates (21) are used for preventing the swinging section (10) swinging after blasting from colliding with the middle seat (11); and the two groups of protection components are respectively used for protecting the two swing sections (10) of the on-off metal (3) after the explosion happens.

10. The blast circuit breaker with an arc chute of claim 1, wherein: the distance between the two second grooves (9) is not less than the minimum safe isolation distance of the circuit voltage where the circuit breaker is located.

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