CN217983190U - Breaker opening device and breaker - Google Patents
Breaker opening device and breaker Download PDFInfo
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- CN217983190U CN217983190U CN202222393510.2U CN202222393510U CN217983190U CN 217983190 U CN217983190 U CN 217983190U CN 202222393510 U CN202222393510 U CN 202222393510U CN 217983190 U CN217983190 U CN 217983190U
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Abstract
The utility model provides a switching-off device and circuit breaker of circuit breaker, the switching-off device includes the spout subassembly, and the spout subassembly includes: the first nozzle part comprises a first body part and a second body part which are distributed along the axial direction of the first nozzle part and are connected with each other, the first body part is provided with a first channel section and a gas chamber which are distributed along the direction vertical to the axial direction of the first nozzle part and are independent from each other, and the second body part is provided with a second channel section communicated with the first channel section; the second nozzle piece is arranged in the second channel section and is provided with a third channel section; a first gap is formed between the second nozzle piece and the first body part along the axial direction of the first nozzle piece, and a second gap is formed between the second nozzle piece and the inner peripheral wall of the second channel section; the second gap is communicated with the first gap and communicated with the air compression chamber; the first body portion further has a first communication hole communicating the air chamber and the first gap. The circuit breaker of this application has solved current high voltage circuit breaker and has had the problem that the ability of breaking electric arc is relatively weak.
Description
Technical Field
The utility model relates to a circuit breaker technical field particularly, relates to a cut-off device and circuit breaker of circuit breaker.
Background
In the breaking process of the circuit breaker, after a moving arc contact and a static arc contact of the high-voltage circuit breaker are separated, electric arcs can be generated due to high voltage. The basic principle of the conventional breaking device of the alternating current circuit breaker is that gas in a cylinder is compressed, the gas blows out electric arcs through a nozzle at high speed, and the breaking device is broken when the energy of the electric arcs is lowest at the zero crossing point.
However, since the alternating current has zero-crossing points and the direct current has no zero-crossing points, the capability of breaking the direct current arc of the general high-voltage circuit breaker is very low, and the high-voltage circuit breaker generally needs to be equipped with additional auxiliary equipment for manufacturing the zero-crossing of the current for breaking, so that the cost is very high.
Therefore, the high-voltage circuit breaker in the prior art has the problems of poor capability of breaking the arc and high cost.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a circuit breaker and a circuit breaker with a high-voltage circuit breaker having a weak ability to break an arc.
In order to achieve the above object, according to the utility model discloses an aspect provides a breaking device of circuit breaker, and it includes quiet arc contact and movable contact subassembly, and the movable contact subassembly includes moving arc contact, plenum chamber and spout subassembly, and the spout subassembly includes: the nozzle comprises a first nozzle part, a second nozzle part and a nozzle body part, wherein the first nozzle part comprises a first body part and a second body part which are distributed along the axial direction of the first nozzle part and are connected with each other, the first body part is provided with a first channel section and a gas chamber which are distributed along the direction vertical to the axial direction of the first nozzle part and are independent from each other, and the second body part is provided with a second channel section communicated with the first channel section; the second nozzle piece is arranged in the second channel section and is provided with a third channel section, a convex part is convexly arranged on the inner wall of the third channel section, and the moving arc contact is arranged in the third channel section and is positioned on one side of the convex part along the axial direction of the third channel section; the first channel section is communicated with the third channel section to form a penetrating channel for the static arc contact to penetrate through; when the disconnecting device is in a closing state, the inner wall and the protruding part of at least part of the channel section of the first channel section are in contact with the outer peripheral wall of the static arc contact; a first gap is formed between the second nozzle piece and the first body part along the axial direction of the first nozzle piece, and a second gap is formed between the second nozzle piece and the inner peripheral wall of the second channel section; the second gap is communicated with the first gap and communicated with the air compression chamber; the first body portion further has a first communication hole communicating the air chamber and the first gap.
Furthermore, the first body part is provided with a plurality of mutually independent air chambers and a plurality of first communication holes, the plurality of first communication holes and the plurality of air chambers are arranged in a one-to-one correspondence manner, and each first communication hole is communicated with the corresponding air chamber; the plurality of first communication holes are communicated with the first gaps; a plurality of air chambers are disposed at intervals circumferentially around the first channel section.
Further, the hole center line of the first communication hole is parallel to or at an acute angle with the central axis of the first channel section.
Further, a second communication hole is formed in the second nozzle member, and two ends of the second communication hole are respectively communicated with the second gap and the first gap.
Further, the hole center line of the second communication hole and the central axis of the third channel segment are arranged in an acute angle.
Further, the second communication holes are plural, and the plural second communication holes are arranged at intervals around the circumference of the third passage section.
Furthermore, the moving contact component also comprises a pull rod which is movably arranged along the axial direction of the moving contact component, and the moving arc contact is arranged at the first end part of the pull rod; the pull rod is provided with a rod cavity extending along the axial direction of the pull rod and penetrating through the first end part of the pull rod and an air outlet hole communicated with the rod cavity; when the breaking device is in a closing state, the static arc contact is inserted into the rod cavity of the pull rod; when the switching-off device is in a switching-off state, the static arc contact is moved out of the rod cavity of the pull rod, so that the rod cavity of the pull rod is communicated with the third channel section.
Furthermore, the moving contact assembly further comprises an air compression shell, the air compression shell is sleeved on the outer side of the pull rod, the cut-off device further comprises a piston arranged in the air compression shell, and the piston is fixedly arranged so that the peripheral wall of the pull rod, the inner wall of the air compression shell and the piston jointly enclose an air compression chamber.
Further, the air outlet hole is positioned on the peripheral wall of the pull rod and is arranged close to the second end of the pull rod; and/or the air outlet holes are multiple and are arranged at intervals along the axial direction of the pull rod.
According to another aspect of the utility model, a circuit breaker is provided, and it includes foretell breaking apparatus.
Use the technical scheme of the utility model, cut-off device includes quiet arc contact and movable contact subassembly, and quiet arc contact is fixed to be set up, and the movable contact subassembly includes movable arc contact, plenum chamber and spout subassembly, and the spout subassembly includes: the nozzle comprises a first nozzle part, a second nozzle part and a nozzle body part, wherein the first nozzle part comprises a first body part and a second body part which are distributed along the axial direction of the first nozzle part and are connected with each other, the first body part is provided with a first channel section and a gas chamber which are distributed along the direction vertical to the axial direction of the first nozzle part and are independent from each other, and the second body part is provided with a second channel section communicated with the first channel section; the second nozzle piece is arranged in the second channel section and is provided with a third channel section, the inner wall of the third channel section is convexly provided with a convex part, and the moving arc contact is arranged in the third channel section and is positioned on one side of the convex part along the axial direction of the third channel section; the first channel section is communicated with the third channel section to form a penetrating channel for the static arc contact to penetrate through; when the breaking device is in a closing state that the movable arc contact and the static arc contact are contacted, the inner wall and the protruding part of at least part of the channel section of the first channel section are contacted with the outer peripheral wall of the static arc contact. The second nozzle part and the first body part are arranged at intervals along the axial direction of the first nozzle part, so that a first gap is formed between the second nozzle part and the first body part along the axial direction of the first nozzle part; a second gap is formed between the second nozzle part and the inner peripheral wall of the second channel section, namely the second nozzle part and the second body part are arranged at intervals along the direction vertical to the axial direction of the first nozzle part, so that a second gap is formed between the second nozzle part and the second body part along the direction vertical to the axial direction of the first nozzle part; the second gap is communicated with the first gap and communicated with the air compression chamber; the first body portion further has a first communication hole communicating the air chamber and the first gap.
In the specific implementation process, the movable contact assembly moves along the direction far away from the static arc contact to enable the switching-off device to carry out switching-off operation, in the switching-off process, the movable arc contact and the static arc contact are separated, the static arc contact gradually moves out of the penetrating channel, one part of gas in the gas compression chamber sequentially passes through the second gap, the first gap and the first communicating hole to enter the gas cavity, and the other part of gas in the gas compression chamber sequentially passes through the second gap and the first gap to blow arc and extinguish arc generated between the movable arc contact and the static arc contact.
In the brake separating process, when the movable contact assembly is located at a first brake separating position, the movable arc contact and the static arc contact are separated, the static arc contact is located in the first channel section, and the inner wall of at least part of the channel section of the first channel section is still contacted with the outer peripheral wall of the static arc contact; in the process, because the inner wall of at least part of the channel section of the first channel section is still contacted with the outer peripheral wall of the static arc contact, the gas in the gas cavity chamber can not flow out of the gas cavity chamber through the first communication hole. When the movable contact assembly is positioned at the second switching-off position, the movable arc contact and the static arc contact are separated, the static arc contact moves out of the first channel section, the energy of electric arcs generated between the movable arc contact and the static arc contact is very small, and high-pressure gas in the gas cavity chamber can flow out through the first connecting hole so as to extinguish the electric arcs generated between the movable arc contact and the static arc contact; the arc extinguishing speed of the electric arc between the moving arc contact and the static arc contact can be accelerated under the combined action of the gas flowing out of the gas compression chamber and the high-pressure gas flowing out of the gas cavity chamber; at this time, the gas after arc extinction can flow out from one end of the first channel section, which is far away from the second channel section, after passing through the first channel section.
Therefore, the circuit breaker has high capacity of breaking electric arcs, and the problem that a high-voltage circuit breaker in the prior art is poor in capacity of breaking electric arcs is solved.
Drawings
The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 shows a schematic structural view of a breaking device of a circuit breaker according to the present invention;
fig. 2 shows a schematic structural view of the moving contact assembly in a first opening position during opening of the opening device of the circuit breaker according to the present invention;
fig. 3 shows a schematic structural diagram of the opening device of the circuit breaker according to the present invention in the second opening position of the moving contact assembly during the opening process;
fig. 4 shows a waveform diagram of the current of the arc between the moving arc contact and the stationary arc contact of the opening device of the circuit breaker according to the invention.
Wherein the figures include the following reference numerals:
10. a first orifice member; 101. a first body part; 102. a second body portion; 111. a first channel segment; 112. a second channel segment; 12. a gas chamber; 13. a first communication hole; 20. a second orifice member; 21. a third channel segment; 211. a projection; 22. a second communication hole; 31. a first gap; 32. a second gap; 40. an electric arc; 81. a moving arc contact; 82. a pull rod; 821. an air outlet; 83. a gas compressing shell; 831. a gas compression chamber; 84. a piston; 85. a second support; 86. a movable main contact; 91. a stationary arc contact; 92. a stationary main contact; 93. a first support.
Detailed Description
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 invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The utility model provides a breaker's device that opens, please refer to fig. 1 to 3, the device that opens includes quiet arcing contact 91 and moving contact subassembly, quiet arcing contact 91 is fixed to be set up, moving contact subassembly includes moving arcing contact 81, plenum 831 and spout subassembly, the spout subassembly includes first spout spare 10 and second spout spare 20, first spout spare 10 includes first body portion 101 and second body portion 102 along its axial distribution and interconnect, first body portion 101 has first passageway section 111 and the air cavity 12 that distributes and is independent each other along the direction perpendicular to the axial of first spout spare 10, second body portion 102 has second passageway section 112 with first passageway section 111 intercommunication; the second nozzle part 20 is arranged in the second channel section 112 and is provided with a third channel section 21, the inner wall of the third channel section 21 is convexly provided with a convex part 211, and the moving arc contact 81 is arranged in the third channel section 21 and is positioned at one side of the convex part 211 along the axial direction of the third channel section 21; the first channel section 111 is communicated with the third channel section 21 to form a penetrating channel for the static arc contact 91 to penetrate through; when the disconnecting device is in a closed state in which the moving arc contact 81 and the stationary arc contact 91 are in contact, both the inner wall of at least part of the channel section of the first channel section 111 and the protrusion 211 are in contact with the outer circumferential wall of the stationary arc contact 91. The second nozzle member 20 and the first body 101 are arranged at an interval along the axial direction of the first nozzle member 10, so that a first gap 31 is formed between the second nozzle member 20 and the first body 101 along the axial direction of the first nozzle member 10; a second gap 32 is formed between the second nozzle opening member 20 and the inner peripheral wall of the second channel section 112, that is, the second nozzle opening member 20 and the second body portion 102 are arranged at intervals along the direction perpendicular to the axial direction of the first nozzle opening member 10, so that the second nozzle opening member 20 and the second body portion 102 have the second gap 32 along the direction perpendicular to the axial direction of the first nozzle opening member 10; the second gap 32 communicates with the first gap 31 and communicates with the air-compression chamber 831; the first body portion 101 also has a first communication hole 13 communicating the air chamber 12 and the first gap 31.
Specifically, the movable contact assembly is movably arranged along a preset direction, so that the movable arc contact 81 is close to or far away from the static arc contact 91, and further the movable arc contact 81 is contacted with or separated from the static arc contact 91; when the moving arc contact 81 is in contact with the static arc contact 91, the switching-on/off device is in a switching-on state; when the moving arc contact 81 is separated from the stationary arc contact 91, the breaking device is in a breaking state. When the moving contact assembly moves in the predetermined direction to cause the moving arcing contact 81 to approach the stationary arcing contact 91, the stationary arcing contact 91 gradually penetrates into the penetration passage.
Specifically, the axial direction of the first spouting member 10 is the same as or parallel to the predetermined direction, and the axial direction of the second spouting member 20 is the same as or parallel to the predetermined direction. The channel structure formed by the first channel section 111 and the second channel section 112 penetrates the first nozzle member 10 along the axial direction of the first nozzle member 10; the third passage section 21 penetrates the second orifice member 20 in the axial direction of the second orifice member 20, so that the axial direction of the third passage section 21 is the same as or parallel to the preset direction.
In the specific implementation process, the movable contact assembly moves along the direction far away from the static arc contact 91 to enable the switching-off device to perform switching-off operation, in the switching-off process, the movable arc contact 81 is separated from the static arc contact 91, the static arc contact 91 gradually moves out of the penetrating channel, one part of gas in the air compression chamber 831 sequentially enters the second gap 32, the first gap 31 and the first communicating hole 13 into the air chamber 12, and the other part of gas in the air compression chamber 831 sequentially enters the second gap 32 and the first gap 31 to blow arc and extinguish arc generated between the movable arc contact 81 and the static arc contact 91.
As shown in fig. 4, during the opening process, when the moving contact assembly starts to move and passes t 1 After a period of time, the moving arc contact 81 and the static arc contact 91 are just separated, and arcing begins between the moving arc contact 81 and the static arc contact 91; following the moving contact assemblyContinuing to move when the moving contact assembly moves from the beginning and passes through t 2 In the time period, the current of the arc reaches the maximum value, and the energy and the temperature of the arc between the movable arc contact 81 and the static arc contact 91 are maximum at the time; when the moving contact component passes t 2 During the time period and when the movement is continued, the current is reduced, the energy of the arc between the moving arc contact 81 and the stationary arc contact 91 is reduced, and the temperature of the arc is reduced at the same time; when the moving contact assembly moves from the beginning to pass t 3 After a period of time, the current is zero, at which time the energy of the arc between the moving arc contact 81 and the stationary arc contact 91 disappears momentarily, so that t 3 At the time point of switching-off, if the insulating gas between the moving arc contact 81 and the fixed arc contact 91 cannot reach sufficient insulating strength in time, the arc will reversely break through the insulating layer formed by the insulating gas and continue to be ignited; the insulating gas here is a gas flowing out of the pressure chamber 831; wherein, t 3 >t 2 >t 1 . The arc 40 in fig. 4 is an arc generated between the moving arc contact 81 and the stationary arc contact 91.
During the opening process, when the moving contact assembly moves from the beginning to pass through t 21 After a time period, the movable contact component is in a first switching-off position, and when the movable contact component starts to move and passes through t 22 After the time period, the moving contact component is in a second switching-off position; wherein, t 3 >t 22 >t 21 >t 2 . When the moving contact assembly is in the first opening position, the moving arc contact 81 and the fixed arc contact 91 are separated, the fixed arc contact 91 is positioned in the first channel section 111, and the inner wall of at least part of the channel section of the first channel section 111 is still in contact with the outer peripheral wall of the fixed arc contact 91, the energy of an electric arc generated between the moving arc contact 81 and the fixed arc contact 91 in the opening stage is larger, and the electric arc generated between the moving arc contact 81 and the fixed arc contact 91 can heat the gas in the gas chamber 12, so that the gas in the gas chamber 12 is heated to expand, and the gas pressure in the gas chamber 12 is further increased; in the process, the inner wall of at least part of the channel section of the first channel section 111 is still contacted with the outer peripheral wall of the static arc contact 91, and the electric arc generated between the moving arc contact 81 and the static arc contact 91 can block the first communication hole 13, so that the air chamber 12 is filled with the gasGas cannot flow out from the gas chamber 12 through the first communication hole 13. When the movable contact assembly is at the second switching position, the movable arc contact 81 and the fixed arc contact 91 are separated, the fixed arc contact 91 is moved out of the first channel section 111, the energy of an electric arc generated between the movable arc contact 81 and the fixed arc contact 91 is very small, and high-pressure gas in the gas chamber 12 can flow out through the first communication hole 13 so as to extinguish the electric arc generated between the movable arc contact 81 and the fixed arc contact 91; under the combined action of the gas flowing out of the gas compression chamber 831 and the high-pressure gas flowing out of the gas chamber 12, on one hand, the pressure of the first passage section 111 is increased, the insulation strength is improved, on the other hand, the gas flow is increased, and the blowing speed is increased, so that more heat is taken away; the arc extinguishing speed of the arc between the moving arc contact 81 and the static arc contact 91 can be further accelerated; at this time, the gas after the arc extinguishing may flow out from one end of the first channel segment 111 far from the second channel segment 112 after passing through the first channel segment 111.
Therefore, the circuit breaker has high arc breaking capacity, and the problem that the high-voltage circuit breaker in the prior art is poor in arc breaking capacity is solved.
Specifically, the moving arc contact 81 has an annular structure; the second gap 32 is an annular gap.
Specifically, the circuit breaker of the present application is a high voltage circuit breaker.
Specifically, the hole center line of the first communication hole 13 is parallel to the center axis of the first passage section 111. Alternatively, the hole center line of the first communication hole 13 is disposed at an acute angle with the central axis of the first channel section 111, the first communication hole 13 has a first end communicating with the air chamber 12 and a second end communicating with the first gap 31, and the first end of the first communication hole 13 is located on one side of the second end away from the central axis of the first channel section 111 in the direction perpendicular to the axial direction of the first channel section 111.
In this embodiment, the first body 101 has a plurality of independent air chambers 12 and a plurality of first communication holes 13, and the plurality of first communication holes 13 are disposed in one-to-one correspondence with the plurality of air chambers 12 so that each of the first communication holes 13 communicates with a corresponding air chamber 12; the plurality of first communication holes 13 each communicate with the first gap 31.
Specifically, the plurality of air chambers 12 are arranged at intervals around the circumference of the first passage section 111, and the plurality of first communication holes 13 are arranged at intervals around the circumference of the first passage section 111.
In this embodiment, the second nozzle member 20 is provided with the second communication hole 22, and both ends of the second communication hole 22 are respectively communicated with the second gap 32 and the first gap 31, so that the gas in the gas compression chamber 831 can also pass through the second gap 32, the second communication hole 22 and the first gap 31 to extinguish the arc generated between the moving arc contactor 81 and the static arc contactor 91.
Specifically, the hole center line of the second communication hole 22 is disposed at an acute angle to the center axis of the third passage section 21.
Specifically, the second communication hole 22 has a first end communicating with the first gap 31 and a second end communicating with the second gap 32; the first end of the second communication hole 22 is located on the side of the second end thereof close to the central axis of the third passage section 21 in the direction perpendicular to the axial direction of the third passage section 21.
Specifically, the second communication hole 22 is plural, and the plural second communication holes 22 are arranged at intervals around the circumference of the third passage section 21.
In this embodiment, the movable contact assembly further includes a pull rod 82, the pull rod 82 is movably disposed along an axial direction of the pull rod 82, and the axial direction of the pull rod 82 is parallel to or the same as the preset direction, so that the pull rod 82 drives the entire movable contact assembly to move along the preset direction; the moving arc contact 81 is arranged at the first end part of the pull rod 82, and the second nozzle part 20 is also sleeved at the first end part of the pull rod 82 and is fixedly connected with the pull rod 82; the pull rod 82 has a rod cavity extending axially therethrough at a first end thereof and an air outlet aperture 821 in communication with the rod cavity. When the switching-on/off device is in a switching-off state, the static arc contact 91 is inserted into the rod cavity of the pull rod 82; when the disconnecting device is in the opening state, the static arc contact 91 is moved out of the rod cavity of the pull rod 82, so that the rod cavity of the pull rod 82 is communicated with the third channel section 21, and the gas after arc extinguishing is discharged from the gas outlet 821 after passing through the rod cavity of the pull rod 82.
In a specific implementation process, when the static arc contact 91 is located in the first channel section 111 and the inner wall of at least part of the channel section of the first channel section 111 contacts with the outer peripheral wall of the static arc contact 91, the gas after arc extinction can only pass through the rod cavity of the pull rod 82 and then be discharged from the gas outlet 821; when the fixed arc contact 91 is removed from the first channel section 111, the extinguished gas may pass through the rod cavity of the pull rod 82 and then be discharged from the gas outlet 821, or may pass through the first channel section 111 and then flow out from the end of the first channel section 111 far from the second channel section 112.
Specifically, the air outlet 821 is located in the external environment to communicate with the external environment.
Specifically, the air outlet hole 821 is provided on the outer peripheral wall of the tie rod 82 and near the second end of the tie rod 82.
Specifically, the plurality of air outlet holes 821 are provided, and the plurality of air outlet holes 821 are arranged at intervals along the axial direction of the pull rod 82.
In this embodiment, the movable contact assembly further includes an air compressing housing 83, the air compressing housing 83 is sleeved on the outer side of the pull rod 82, so as to form an air compressing chamber 831 around the outer side of the pull rod 82; the disconnecting device further comprises a piston 84 arranged in the compressor housing 83, and the piston 84 is fixedly arranged, that is, the compressor housing 83 is movably arranged relative to the piston 84, so that the outer circumferential wall of the pull rod 82, the inner wall of the compressor housing 83 and the piston 84 together enclose a sealed compressed air chamber 831. When the movable contact assembly moves in a predetermined direction and in a direction close to the stationary arc contact 91, the piston 84 can compress the gas in the gas compression chamber 831 because the piston 84 is fixedly disposed.
Specifically, the first nozzle member 10 is fixedly connected to the air compressing casing 83.
In this embodiment, the breaking means further comprise a second seat 85 fixedly connected to the piston 84. Optionally, the piston 84 and the second support 85 are an integrally formed structure, the piston 84 and the second support 85 form a support structure, the support structure has a guide channel, and the extension direction of the guide channel is parallel to or the same as the preset direction; the pull rod 82 is inserted into the guide channel, so that the support structure can guide the movement of the pull rod 82.
In this embodiment, the switching device further includes a fixed contact assembly, the fixed contact assembly includes a fixed main contact 92 and a fixed arc contact 91, and the moving contact assembly further includes a moving main contact 86; when the moving contact assembly moves along the preset direction, the moving main contact 86 approaches or leaves the static main contact 92, and then the moving main contact 86 is contacted with or separated from the static main contact 92; when the breaking device is in the closing state, the moving main contact 86 is in contact with the stationary main contact 92, and when the breaking device is in the opening state, the moving main contact 86 is separated from the stationary main contact 92.
In the specific implementation process, when the opening operation is performed, the movable main contact 86 and the static main contact 92 are separated firstly, and the static arc contact 91 and the movable arc contact 81 are separated later. When the switching-on/off device is in a switching-on state, current sequentially flows through the static main contact 92, the dynamic main contact 86, the air compression shell 83 and the second support 85, and at the moment, air in the air compression chamber 831 is at normal pressure; the compressor housing 83, the piston 84 and the second support 85 can all be arranged in an electrically conductive manner.
Specifically, the movable main contact 86 is fixedly connected with the air compression housing 83; the movable main contact 86 is of an annular structure, and the movable main contact 86 is located on the circumferential outer side of the first nozzle piece 10 and is arranged at intervals with the first nozzle piece 10; the central axis of the movable main contact 86 extends in the same direction as or in parallel with the axial direction of the first nozzle member 10.
Specifically, the stationary main contact 92 is of an annular structure, and the stationary arc contact 91 is located in a cavity of the stationary main contact 92; the extending direction of the center axis of the stationary main contact 92 is the same as or parallel to the penetrating direction in which the stationary arc contact 91 is penetrated into the penetrating passage.
Specifically, the static contact assembly further includes a first support 93, and the static main contact 92 and the static arc contact 91 are both fixedly connected and contacted with the first support 93, and the first support 93 is electrically conductive.
The utility model also provides a circuit breaker, it includes foretell breaking apparatus.
From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:
the utility model provides an among the cut-off unit of circuit breaker, the cut-off unit includes quiet arcing contact 91 and moving contact subassembly, and quiet arcing contact 91 is fixed to be set up, and moving contact subassembly includes moving arcing contact 81, plenum chamber 831 and spout subassembly, and the spout subassembly includes: a first spout member 10, the first spout member 10 including a first body portion 101 and a second body portion 102 distributed along an axial direction thereof and connected to each other, the first body portion 101 having a first passage section 111 and a gas chamber 12 distributed along a direction perpendicular to the axial direction of the first spout member 10 and independent from each other, the second body portion 102 having a second passage section 112 communicating with the first passage section 111; the second nozzle part 20 is arranged in the second channel section 112 and is provided with a third channel section 21, the inner wall of the third channel section 21 is convexly provided with a convex part 211, and the moving arc contact 81 is arranged in the third channel section 21 and is positioned on one side of the convex part 211 along the axial direction of the third channel section 21; the first channel section 111 is communicated with the third channel section 21 to form a penetrating channel for the static arc contact 91 to penetrate through; when the disconnecting device is in a closed state in which the moving arc contact 81 and the stationary arc contact 91 are in contact, both the inner wall of at least part of the channel section of the first channel section 111 and the protrusion 211 are in contact with the outer circumferential wall of the stationary arc contact 91. The second nozzle member 20 and the first body 101 are arranged at an interval along the axial direction of the first nozzle member 10, so that a first gap 31 is formed between the second nozzle member 20 and the first body 101 along the axial direction of the first nozzle member 10; a second gap 32 is formed between the second nozzle opening member 20 and the inner peripheral wall of the second channel section 112, that is, the second nozzle opening member 20 and the second body portion 102 are arranged at intervals along the direction perpendicular to the axial direction of the first nozzle opening member 10, so that the second nozzle opening member 20 and the second body portion 102 have the second gap 32 along the direction perpendicular to the axial direction of the first nozzle opening member 10; the second gap 32 communicates with the first gap 31 and with the air-compression chamber 831; the first body portion 101 also has a first communication hole 13 communicating the air chamber 12 and the first gap 31.
In the specific implementation process, the movable contact assembly moves along the direction far away from the static arc contact 91 to enable the switching-off device to perform switching-off operation, in the switching-off process, the movable arc contact 81 is separated from the static arc contact 91, the static arc contact 91 gradually moves out of the penetrating channel, one part of gas in the air compression chamber 831 sequentially enters the second gap 32, the first gap 31 and the first communicating hole 13 into the air chamber 12, and the other part of gas in the air compression chamber 831 sequentially enters the second gap 32 and the first gap 31 to blow arc and extinguish arc generated between the movable arc contact 81 and the static arc contact 91.
In the opening process, when the movable contact assembly is in the first opening position, the movable arc contact 81 and the fixed arc contact 91 are separated, the fixed arc contact 91 is positioned in the first channel section 111, and the inner wall of at least part of the channel section of the first channel section 111 is still in contact with the outer peripheral wall of the fixed arc contact 91, the energy of an electric arc generated between the movable arc contact 81 and the fixed arc contact 91 in the opening stage is larger, and the electric arc generated between the movable arc contact 81 and the fixed arc contact 91 can heat the gas in the gas chamber 12, so that the gas in the gas chamber 12 is heated to expand, and the gas pressure in the gas chamber 12 is further increased; in this process, since the inner wall of at least a part of the channel section of the first channel section 111 is still in contact with the outer peripheral wall of the stationary arc contact 91, the gas in the gas chamber 12 cannot flow out from the gas chamber 12 through the first communication hole 13. When the moving contact assembly is at the second switching position, the moving arc contact 81 and the fixed arc contact 91 are separated, the fixed arc contact 91 moves out of the first channel section 111, at the moment, the energy of an electric arc generated between the moving arc contact 81 and the fixed arc contact 91 is very small, and high-pressure gas in the gas chamber 12 can flow out through the first communication hole 13 so as to extinguish the electric arc generated between the moving arc contact 81 and the fixed arc contact 91; under the combined action of the gas flowing out of the gas compression chamber 831 and the high-pressure gas flowing out of the gas chamber 12, the arc extinguishing speed of the arc between the moving arc contact 81 and the fixed arc contact 91 can be increased; at this time, the gas after the arc extinguishing may flow out from the end of the first channel section 111 far from the second channel section 112 after passing through the first channel section 111.
Therefore, the circuit breaker has high capacity of breaking electric arcs, and the problem that a high-voltage circuit breaker in the prior art is poor in capacity of breaking electric arcs is solved.
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 is to be understood that the data so used may be interchanged under appropriate circumstances such that, for example, embodiments of the application described herein may be implemented in sequences other than those illustrated or described herein. 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.
For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; above" may include both orientations "at 8230; \8230; above" and "at 8230; \8230; below". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a switching-off device of circuit breaker, includes quiet arcing contact (91) and moves the contact subassembly, it includes moving arc contact (81), plenum chamber (831) and spout subassembly to move the contact subassembly, its characterized in that, the spout subassembly includes:
a first spout member (10), said first spout member (10) comprising a first body portion (101) and a second body portion (102) distributed along an axial direction thereof and connected to each other, said first body portion (101) having a first passage section (111) and a gas chamber (12) distributed along a direction perpendicular to the axial direction of said first spout member (10) and independent from each other, said second body portion (102) having a second passage section (112) communicating with said first passage section (111);
the second nozzle piece (20) is arranged in the second channel section (112) and is provided with a third channel section (21), a convex part (211) is convexly arranged on the inner wall of the third channel section (21), and the moving arc contact (81) is arranged in the third channel section (21) and is positioned on one side of the convex part (211) along the axial direction of the third channel section (21); the first channel section (111) is communicated with the third channel section (21) to form a penetrating channel for the static arc contact (91) to penetrate through; when the disconnecting device is in a closing state, the inner wall of at least part of the channel section of the first channel section (111) and the projection (211) are both in contact with the outer peripheral wall of the static arc contact (91);
wherein a first gap (31) is formed between the second nozzle member (20) and the first body portion (101) along the axial direction of the first nozzle member (10), and a second gap (32) is formed between the second nozzle member (20) and the inner peripheral wall of the second passage section (112); the second gap (32) communicates with the first gap (31) and with the plenum (831); the first body portion (101) further has a first communication hole (13) communicating the air chamber (12) and the first gap (31).
2. The opening device of a circuit breaker according to claim 1, wherein the first body portion (101) has a plurality of mutually independent air chambers (12) and a plurality of first communication holes (13), the plurality of first communication holes (13) being provided in one-to-one correspondence with the plurality of air chambers (12), each of the first communication holes (13) being communicated with a corresponding air chamber (12); the plurality of first communication holes (13) are all communicated with the first gap (31); a plurality of said air chambers (12) are arranged at intervals around the circumference of said first channel section (111).
3. The opening device of a circuit breaker according to claim 1, characterized in that the hole center line of the first communication hole (13) is arranged parallel to or at an acute angle to the center axis of the first channel section (111).
4. The opening device of a circuit breaker according to claim 1, wherein a second communication hole (22) is provided on the second nozzle member (20), and both ends of the second communication hole (22) communicate with the second gap (32) and the first gap (31), respectively.
5. The opening device of a circuit breaker according to claim 4, characterized in that a hole center line of the second communication hole (22) is disposed at an acute angle to a center axis of the third passage section (21).
6. The opening device of a circuit breaker according to claim 4, wherein the second communication hole (22) is plural, and the plural second communication holes (22) are arranged at intervals around the circumference of the third passage section (21).
7. The opening device of a circuit breaker according to claim 1, characterized in that said moving contact assembly further comprises a pull rod (82) movably disposed along its own axial direction, said moving arcing contact (81) being disposed at a first end portion of said pull rod (82); the pull rod (82) has a rod cavity extending axially therealong and through a first end thereof and an outlet bore (821) in communication with the rod cavity;
when the breaking device is in a closing state, the static arc contact (91) is inserted into a rod cavity of the pull rod (82); when the switching-off device is in a switching-off state, the static arc contact (91) is moved out of the rod cavity of the pull rod (82) so that the rod cavity of the pull rod (82) is communicated with the third channel section (21).
8. The breaking device of the circuit breaker according to claim 7, characterized in that the moving contact assembly further comprises an air compressing housing (83), the air compressing housing (83) is sleeved outside the pull rod (82), the breaking device further comprises a piston (84) arranged in the air compressing housing (83), and the piston (84) is fixedly arranged, so that the peripheral wall of the pull rod (82), the inner wall of the air compressing housing (83) and the piston (84) jointly enclose the air compressing chamber (831).
9. The opening device of a circuit breaker according to claim 7,
the air outlet hole (821) is positioned on the peripheral wall of the pull rod (82) and is arranged close to the second end of the pull rod (82); and/or
The number of the air outlet holes (821) is multiple, and the air outlet holes (821) are arranged at intervals along the axial direction of the pull rod (82).
10. A circuit breaker, characterized in that it comprises a breaking device according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222393510.2U CN217983190U (en) | 2022-09-08 | 2022-09-08 | Breaker opening device and breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222393510.2U CN217983190U (en) | 2022-09-08 | 2022-09-08 | Breaker opening device and breaker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217983190U true CN217983190U (en) | 2022-12-06 |
Family
ID=84264858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222393510.2U Active CN217983190U (en) | 2022-09-08 | 2022-09-08 | Breaker opening device and breaker |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217983190U (en) |
-
2022
- 2022-09-08 CN CN202222393510.2U patent/CN217983190U/en active Active
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