CN115662856A - Arc extinguishing chamber and circuit breaker with arc extinguishing chamber - Google Patents
Arc extinguishing chamber and circuit breaker with arc extinguishing chamber Download PDFInfo
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- CN115662856A CN115662856A CN202211353726.4A CN202211353726A CN115662856A CN 115662856 A CN115662856 A CN 115662856A CN 202211353726 A CN202211353726 A CN 202211353726A CN 115662856 A CN115662856 A CN 115662856A
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Abstract
The invention discloses an arc extinguish chamber and a circuit breaker with the same, wherein the arc extinguish chamber comprises a first arc extinguish chamber and a second arc extinguish chamber; the first arc extinguish chamber comprises a first arc isolating plate, a second arc isolating plate and arc extinguish grid pieces; the arc extinguishing grid plate is positioned between the first arc-isolating plate and the second arc-isolating plate; the second arc extinguish chamber comprises an arc extinguish chamber, two arc isolating plates which are oppositely arranged and tightly attached to two sides of the arc extinguish chamber, a plurality of arc extinguishing grid pieces which are arranged between the two arc isolating plates, arc striking pieces which are arranged above the grid pieces and gas generating materials. The first arc extinguish chamber is clamped on a static contact of the circuit breaker; the second arc extinguish chamber is fixed on the bulge of the static contact and the base of the circuit breaker. In the circuit breaker with the arc extinguish chamber, the mounting surfaces of the operating mechanism and the tripper are reduced to form a first front surface, so that the depth of the circuit breaker is reduced. The arc extinguish chamber is suitable for the circuit breaker with the limited space in the depth direction and leading out wires, and meets the requirements of good arc extinguish performance, zero arcing, small size in the depth direction, leading out wires in the front of the plate and convenient disassembly of the arc extinguish chamber.
Description
Technical Field
The invention relates to an arc extinguish chamber in a low-voltage electrical appliance, in particular to an arc extinguish chamber and a circuit breaker with the arc extinguish chamber.
Background
The circuit breaker is an electric appliance which protects a line and electric equipment in the line from being damaged by fault current by quickly opening a movable contact and a fixed contact to cut off a circuit. As the contacts begin to open, the contact pressure acting between them will decrease, the contact area will also decrease, and the contact resistance and heat developed in the contacts will increase. The heat is concentrated in a small volume and the metal is heated to a high temperature to melt. A liquid metal bridge is formed between the contacts and finally the metal bridge is pulled apart, forming an arc between the contacts. The circuit breaker completes circuit breaking by the moment when the electric arc is extinguished. The arc may have temperatures of tens of thousands of degrees celsius or higher and intense radiation, and any solid, liquid or gas in the arc region will undergo strong physical and chemical changes under the action of the arc. If the arc is extinguished for a long time, the movable contact and the fixed contact of the circuit breaker can be damaged, and meanwhile, the fault current can also damage the line and the electric equipment in the line. Therefore, the faster the arc extinguishing speed of the circuit breaker is, the better the breaking performance is.
The circuit breaker relies on the explosion chamber to extinguish electric arc, the gas outlet of the arc extinguishing system is a channel for discharging high-pressure gas inside the circuit breaker to the outside of the circuit breaker after electric arc is generated, when electric arc is generated, a large amount of gas generated by heating of an internal gas generating material and internal gas expand due to heating so that the internal gas pressure of the explosion chamber is larger, and the gas is discharged to the outside of the circuit breaker through the gas outlet to form gas blowing. The working principle of the arc extinguish chamber is that electric arcs are elongated through air blowing and magnetic blowing and are quickly transferred into the arc extinguish chamber, and then the electric arcs are cut through grid sheets inside the arc extinguish chamber to form a plurality of short arcs. The voltage increased by arc elongation and the short arc voltage are accumulated to form the arc voltage, when the arc voltage is greater than the instantaneous value of the power supply voltage, the current is forcibly reduced, the current is reduced to zero, and the arc is extinguished.
At present, a circuit breaker used in a new energy photovoltaic power generation alternating current side system needs to meet the requirements of high performance, miniaturization and low use cost at the same time. The breaker can also control the opening and closing of the switch in a remote way, and the operating mechanism of the breaker is required to be an energy storage type operating mechanism. Firstly, the working voltage of the circuit breaker is higher and is not lower than AC1000V; secondly, the smaller the requirement of the depth direction size of the circuit breaker is, the better the circuit breaker is, if the requirement is that the depth direction size of the circuit breaker is not larger than the depth direction size of a conventional circuit breaker of a lower first-gear shell frame grade; thirdly, the circuit breaker is provided with the requirement for reducing wiring cost in the cabinet body, and the circuit breaker adopts a scheme of outgoing wires in front of a board, so that unnecessary bending of a main loop conductor can be avoided, and the using amount and the processing cost of the main loop conductor are reduced.
The arrangement space of the arc extinguish chamber is limited due to the limited size of the breaker in the depth direction, and the main circuit conductor outgoing from the front of the plate occupies some space in the depth direction, so that the space for arranging the arc extinguish chamber is smaller, and the large number of grid pieces cannot be realized. Conventional arc chutes, which achieve a good arc extinguishing effect with a large number of grids, have not been suitable for this type of circuit breaker.
Most of the traditional installation modes of the arc extinguish chamber of the plate front outgoing line circuit breaker are that after a fixed contact is installed on a bottom plate, the arc extinguish chamber is placed at the front end, and then the arc extinguish chamber is clamped by a base and the bottom plate in six directions including front, back, left, right, upper and lower, so that the arc extinguish chamber is sealed in a cavity formed by the base and the bottom plate. The disadvantages are: 1. an air outlet of an arc extinguishing system of the circuit breaker is generally arranged on the base, so that a third filter screen for removing free arc is inconvenient to add, and zero arcing is difficult to realize; 2. after the installation of the complete machine is completed, the arc extinguish chamber can not be drawn out, and if the condition of the contact inside the product needs to be observed, the circuit breaker needs to be disassembled.
At present, the arc extinguish chamber of a few plate front outgoing line circuit breakers is installed in a manner that a base is installed after a static contact is installed on a bottom plate, the upper part of a cavity formed by the base and the bottom plate is an open port, the arc extinguish chamber is pushed into the cavity from the upper end of the open port and is arranged at the front end of the static contact, and then the arc extinguish chamber is installed on the base and the bottom plate is positioned at the left side and the right side of the static contact. The advantages of this type of mounting are: 1. an air outlet of an arc extinguishing system of the circuit breaker is arranged on the arc extinguishing chamber, so that a third filter screen for removing free ions is conveniently added, and zero arcing is realized; 2. the breaker is not required to be disassembled when the arc extinguish chamber is disassembled. The bottom plate is provided with slots for the spacing plates or the terminal protection covers and mounting holes for the arc extinguish chambers, so that the strength of the bottom plate is reduced. However, when short-circuit current is broken, electric arc is generated, gas generated by heating of gas generation materials in the arc extinguish chamber and air generated by heating expansion of air are high in air pressure, and the requirement on the installation strength of the arc extinguish chamber is high. Or the size of increase left and right sides direction or occupy the static contact space, do higher to the mounting hole intensity of explosion chamber, the former is not conform to miniaturized trend, the latter can increase the temperature rise of circuit breaker.
Therefore, how to satisfy the requirements of small size in the depth direction and front line outgoing of the board at the same time becomes a technical problem which needs to be solved urgently.
Disclosure of Invention
The purpose of the invention is as follows: aiming at the defects in the prior art, the invention provides an arc extinguish chamber and a circuit breaker with the arc extinguish chamber, wherein the arc extinguish chamber is suitable for a circuit breaker with a plate front outgoing line with limited space in the depth direction, and meets the requirements of good arc extinguish performance, zero arcing, small size in the depth direction, the plate front outgoing line and convenient disassembly of the arc extinguish chamber.
The technical scheme is as follows: the arc extinguish chamber comprises a first arc extinguish chamber and a second arc extinguish chamber;
the first arc extinguish chamber comprises a first arc isolating plate, a second arc isolating plate and arc extinguish grid pieces; the arc extinguishing grid plate is positioned between the first arc-isolating plate and the second arc-isolating plate;
the second arc extinguish chamber comprises an arc extinguish chamber, two arc isolation plates, a plurality of arc extinguish grid pieces, arc striking pieces and gas generating materials, wherein the two arc isolation plates are tightly attached to two sides of the arc extinguish chamber and are oppositely arranged, and the arc striking pieces and the gas generating materials are arranged between the two arc isolation plates.
The first arc extinguish chamber is clamped on a static contact of the circuit breaker; the second explosion chamber is fixed on the base of the protruding of static contact and circuit breaker.
Wherein, the arc extinguishing chamber comprises first arc extinguishing chamber and second arc extinguishing chamber.
The gas outlet of the arc-extinguishing chamber is an exhaust passage formed by the mutual shielding of a first arc-extinguishing chamber, a first free metal filter screen, a first insulating plate, a second free metal filter screen, a second insulating plate and a third free filter screen.
And the space between the first grid piece of the first arc extinguish chamber and the arc striking piece of the second arc extinguish chamber is a grid piece arrangement area.
The front end of the exhaust channel is wider than the rear end, because gas-generating materials inside the circuit breaker are heated to generate a large amount of gas and the internal gas is heated to expand when electric arcs are generated, so that the internal pressure of the arc extinguish chamber is higher, the gas is discharged to the outside of the circuit breaker through the gas outlet, the front end of the gas outlet is wide, the rear end of the gas outlet is narrow, and the front end of the gas outlet is closer to the front than the front-end grid piece, so that the gas is sprayed out through the front end of the front-end grid piece and is cut by the grid piece after passing, and the cutting efficiency of the grid piece is improved; the narrow gas outlet part at the rear end can ensure that the gas outlet at the rear end of the arc extinguish chamber is smooth.
The front end of the exhaust channel is higher than the grid sheet arrangement area.
The grid arrangement area is enlarged from the inside to the outside in the up-down direction inside the circuit breaker.
The arc extinguishing grid piece of first explosion chamber and the arc extinguishing grid piece, the arc striking piece of second explosion chamber incline in proper order and are radially arranged.
The structures of the first arc-extinguishing chamber and the second arc-extinguishing chamber are insulated from the conductor part of the fixed contact of the circuit breaker.
The circuit breaker with the arc extinguish chamber comprises the arc extinguish chamber, a fixed contact, a movable contact, an operating mechanism, a release, a base, a bottom plate, a secondary terminal and a face shield;
a plurality of cavities are formed between the base and the bottom plate, and the fixed contact, the movable contact, the bottom plate and the base form the rear wall of the cavity; the mounting surfaces of the operating mechanism and the trip unit are lowered to form a first front surface and thereby reduce the depth of the circuit breaker.
The static contact, the arc extinguish chamber and the moving contact form one pole of the circuit breaker;
the operating mechanism is movably connected with the moving contact and then fixed on the base;
the release drives the operating mechanism to open the circuit breaker;
the face guard is fixed on the surface of base and covers operating device, release and secondary terminal.
The static contact is provided with a concave-convex matched structure such as a first concave structure and a second concave structure.
Has the advantages that: compared with the prior art, the invention has the following advantages:
(1) The arc extinguish chamber grid piece has high cutting efficiency: when electric arcs are generated, the gas generating material in the circuit breaker is heated to generate a large amount of gas, the gas in the arc extinguish chamber is heated to expand, so that the gas pressure in the arc extinguish chamber is higher, the gas is discharged to the outside of the circuit breaker through the gas outlet, the front end of the gas outlet is wide and the rear end of the gas outlet is narrow, and the front end of the gas outlet is closer to the front than the front-end grid piece, so that the gas is sprayed out from the front end of the front-end grid piece and is cut by the grid piece, and the cutting efficiency of the grid piece is further improved.
(2) The arc extinguish chamber is narrow in the rear end of the air outlet and arranged in the left and right centers, so that high-pressure gas is prevented from being directly sprayed to fastening bolts on two sides of a main loop lap joint copper bar when high current is cut off, the bolt head is prevented from being damaged, and the bolt cannot be screwed down when a product is replaced; the lower end of the air outlet is narrow, so that the rear end of the arc extinguish chamber can smoothly discharge air.
(3) The space utilization rate of the arc extinguish chamber is high: the second explosion chamber is fixed on static contact and base, and the structure of installation second explosion chamber on first explosion chamber and the static contact has space coincidence in the front and back direction. Due to the existence of the first arc-extinguishing chamber, the grid pieces can be arranged in the space blocked by the structure for fixing the second arc-extinguishing chamber on the static contact, the space utilization rate is improved, and more grid pieces can be arranged.
(4) Safe and reliable's explosion chamber mounting means: when the arc extinguish chamber is arranged at one end close to the static contact, the arc extinguish chamber is not arranged on the bottom plates at two sides of the static contact but arranged on the static contact head part, so that the arc extinguish chamber is effectively fixed when a large current is cut off; and the installation structure is insulated from the conductive part of the static contact, so that the arc extinguish chamber is prevented from exposing the circuit breaker part to be electrified.
(5) The lower end of an arc extinguishing cover of the arc extinguishing chamber is installed by adopting a left-right direction screw matched with a nut, so that the contact between an installation screw and a main loop lapping copper bar and a fastening screw is avoided, and the insulation effect is better; and the installation mode of the screw matched with the nut is preferably selected, so that the installation of the arc extinguishing cover is firmer than that of a plastic part, and the arc extinguishing cover is ensured to be reliably installed when the arc extinguishing cover is impacted by high-pressure gas.
(6) The arc extinguish chamber is convenient to disassemble: the arc extinguish chamber is taken out under the condition that the base is not disassembled, so that the conditions of the internal moving and static contacts are conveniently observed, and the parameters such as the opening distance are measured.
(7) The circuit breaker depth direction size is little: the base installation energy storage operating device, the front surface of release reduces to the rear, and the part that only the explosion chamber corresponds is higher, and then the effectual size that reduces the circuit breaker depth direction.
Drawings
FIG. 1 is a perspective view of a base in an embodiment of the present invention;
fig. 2 is a schematic view of a constituent arc chute of a first arc chute and a second arc chute in an embodiment of the invention;
fig. 3 is a schematic view of a first arc-extinguishing chamber mounted on a stationary contact in an embodiment of the present invention;
figure 4 is a perspective view of a second arc chute in an embodiment of the invention;
FIG. 5 is a cross-sectional view of an arc chute in an embodiment of the invention;
figure 6 is a schematic diagram of the composition of an arc chute which is a composition of a second arc chute in an embodiment of the invention;
figure 7 is a perspective view of the circuit breaker of an embodiment of the invention without the second arc chute;
fig. 8 is a sectional view of a cavity formed by a circuit breaker base plate and a base in an embodiment of the invention;
figure 9 is a cross-sectional view of a circuit breaker in an embodiment of the present invention;
fig. 10 is a perspective view of a circuit breaker in an embodiment of the present invention.
Detailed Description
The circuit breaker of the present invention is a single-pole or multi-pole circuit breaker, such as a two-pole circuit breaker, a three-pole circuit breaker, or a four-pole circuit breaker, and is suitable for the case where the circuit board is wired out in front and the dimension in the depth direction is limited.
Left and right in this embodiment are defined as the first pole is located at left, and the third pole is located at right, that is, the main loop conductors of the first pole to the third pole are respectively arranged in three cavities 10 distributed left and right formed by the base 3 and the bottom plate 2. In this embodiment, the upper and lower directions are defined as that the fixed contact 4 is located at an upper position, the outlet conductor 5-1 of the movable contact 5 is located at a lower position, that is, the fixed contact 4, the movable contact 5, and the outlet conductor 5-1 of the movable contact 5 sequentially form a main loop conductor of each pole of the circuit breaker from top to bottom, the fixed contact 4 extends upward to the upper part outside the cavity, and the outlet conductor 5-1 extends downward to the lower part outside the cavity.
The definition of the front and back in this embodiment is that the energy storage type operating mechanism 6 is located in front, the bottom plate 2 is located in back, and the bottom plate 2, the fixed contact 4, the movable contact 5, the arc extinguish chamber 1, the base 3, the energy storage type operating mechanism 6, the release 8, the secondary terminal 7 and the face shield 9 are arranged in sequence from back to front. The definitions of left, right, front, back, upper and lower in this document are for convenience of description and understanding in conjunction with the accompanying drawings.
As shown in fig. 1 and 8, the circuit breaker of the present invention includes an arc extinguish chamber 1, a fixed contact 4, a movable contact 5, an energy storage type operating mechanism 6, a release 8, a base 3, a bottom plate 2, a secondary terminal 7, and a face shield 9. As shown in fig. 7, the base 3 is located in front of the bottom plate 2, and they are closely fitted to form a plurality of cavities 10 from top to bottom. The fixed contact 4 and the movable contact 5 are arranged in the cavity 10 from top to bottom along each cavity back wall 2-1 formed by the bottom plate 2 and the base 3. The arc extinguish chamber 1 is arranged in the area where the static contact 4 and the movable contact 5 are opened, thereby forming each pole of the circuit breaker; the energy storage type operating mechanism 6 and the moving contact 5 are movably arranged and then fixed on the front surface of the base 3. A release 8 is fixed to the front surface of the base 3 and drives the energy storage type operating mechanism 6 to open the circuit breaker. A face cover 9 is fixed to the front surface of the base 3 and covers the energy storage type operating mechanism 6, the release 8 and the secondary terminal 7.
As shown in fig. 2 and 3, the arc extinguish chamber 1 includes a first arc extinguish chamber 1-1 and a second arc extinguish chamber 1-2, and the stationary contact 4 is provided with a concave-convex matching structure, such as a first concave structure 4-3 and a second concave structure 4-4.
As shown in fig. 9, the mounting surfaces of the energy accumulating type operating mechanism 6 and the tripper 7 are lowered rearward on the front surface of the base 3, forming a first front surface 3-2. The energy storage type operating mechanism 6 occupies a large dimension in the depth direction of the circuit breaker, and the corresponding area is the maximum value of the dimension in the depth direction of the circuit breaker, so that the first front surface 3-2 is reduced, and the dimension in the depth direction of the circuit breaker is further reduced. The second front surface 3-1 of the base 3 corresponding to the upper part of the arrangement area of the arc extinguish chamber 1 is lifted forwards, and the cavity front wall 3-3 corresponding to the cavity 10 meets the space of the arc extinguish chamber grid in fan-shaped radial arrangement; the secondary terminals 7 are arranged on the second front surface 3-1.
As shown in fig. 2, 3, 4 and 5, the first arc-extinguishing chamber 1-1 comprises a first arc-isolating plate 1-1-1 and a second arc-isolating plate 1-1-2, and a plurality of arc-extinguishing grid pieces 1-1-3 installed between the two arc-isolating plates. The second arc extinguish chamber 1-2 comprises an arc extinguish chamber 1-3, two arc isolating plates 1-4 which are oppositely arranged and tightly attached to the left side and the right side of the arc extinguish chamber 1-3, a plurality of arc extinguish grid plates 1-7 which are arranged between the two arc isolating plates 1-4, arc striking plates 1-6 which are arranged above the grid plates and gas generating material parts 1-5.
The space between the first grid piece of the first arc-extinguishing chamber 1-1 and the arc striking piece 1-6 of the second arc-extinguishing chamber 1-2 is a grid piece arrangement area. Arc extinguishing grids 1-1-3 of the first arc extinguishing chamber 1-1, arc extinguishing grids 1-7 of the second arc extinguishing chamber 1-2 and arc striking plates 1-6 are sequentially inclined to form a fan shape and are radially arranged upwards and forwards, and grid plate arrangement areas are gradually enlarged from inside to outside in the vertical direction in the circuit breaker.
The first arc isolating plate 1-1-3 and the second arc isolating plate 1-1-4 of the first arc extinguish chamber 1-1 are provided with a clamping bulge I1-1-1 and a clamping bulge II 1-1-2. The first arc extinguish chamber 1-1 is clamped on the fixed contact 4 of the circuit breaker and is not directly drawn out from the upper part of the circuit breaker in a translation manner; the second arc-extinguishing chamber 1-2 is fixed on a mounting hole 4-5 on the bulge of the static contact 4 and a mounting hole 3-5 on the base, the structures of the first arc-extinguishing chamber 1-1 and the second arc-extinguishing chamber 1-2 mounted on the static contact 4 are overlapped in a front-back direction with spaces, and after the mounting screws are removed, the second arc-extinguishing chamber 1-2 is horizontally moved and pulled out from the upper part of the circuit breaker. After the second arc chute 1-2 is drawn out, the first arc chute 1-1 moves forward and is taken out from above the circuit breaker. The structures of the first arc-extinguishing chamber 1-1 and the second arc-extinguishing chamber 1-2 are insulated from the conductor part on the stationary contact 4.
As shown in fig. 5 and 6, the arc-extinguishing chamber 1-3 of the present embodiment is formed by the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 1-3-2 being clamped together and fixedly mounted. The arc extinguishing cover is provided with an air outlet of the circuit breaker, and the air outlet is a T-shaped exhaust channel which is formed by mutually shielding a first arc extinguishing cover 1-3-1, a first free metal removing filter screen 1-3-3, a first insulating plate 1-3-4, a second free metal removing filter screen 1-3-5, a second insulating plate 1-3-6, a third free metal removing filter screen three 1-3-7 and a second arc extinguishing cover 1-3-2, wherein the front end width is c1, the rear end width is c2, and c1 is more than c 2.
The front end of the portion of the exhaust passage width c1 exceeds the front end of the grid plate arrangement area. The shape of the "air outlet" in this embodiment is realized by the "T" shaped grooves on the first insulating plate 1-3-4 and the second insulating plate 1-3-6. When an electric arc is generated, a gas generating material in the breaker is heated to generate a large amount of gas, the gas in the arc extinguish chamber is heated to expand, so that the internal gas pressure in the arc extinguish chamber is higher, the gas is discharged to the outside of the breaker through the gas outlet, the front end of the gas outlet is wide, the rear end of the gas outlet is narrow, and the front end of the gas outlet is closer to the front than the front-end grid plate, so that the gas is sprayed out through the front end of the front-end grid plate and is cut by the grid plate, and the cutting efficiency of the grid plate is improved; the narrow gas outlet part at the rear end enables the rear end of the arc extinguish chamber to smoothly discharge gas.
As shown in figure 6, three mounting holes with the axial direction of up and down are sequentially arranged at the front ends of the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 1-3-2, the mounting holes at the left side and the right side are mounting holes 1-3-1a and mounting holes 11 which are used for mounting the arc-extinguishing chamber on the base, mounting holes 02 and mounting holes 12 which are used for mounting the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 1-3-2 together, and mounting holes 03 1-3-1c and mounting holes 13 1-3-2c which are used for mounting the arc-extinguishing chamber on the base. The two sides of the rear ends of the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 13-2 are provided with an installation hole 04 ' 1-3-1d and an installation hole 14 ' 1-3-2d which are used for installing the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 1-3-2 together and have the axial direction of left and right, an installation hole 05 ' 1-3-1e and an installation hole 15 ' 1-3-2e, and an installation hole 16 ' 1-3-2f which is used for installing the arc-extinguishing chamber on the static contact and has the axial direction of up and down is arranged in the middle of the rear ends of the first arc-extinguishing chamber 1-3-1 and the second arc-extinguishing chamber 1-3-2; referring to fig. 6 again, the arc-extinguishing chamber 1 is mounted on the base 3 at a position of an arc-extinguishing chamber mounting hole 3-5 of each pole, and the stationary contact 5 of each pole is mounted at a position of a mounting hole 4-5 on the protrusion of the stationary contact 4.
The mounting surfaces of the energy storage type operating mechanism and the release are lowered backwards on the front surface of the base to form a first front surface; the area corresponding to the size occupied by the energy storage type operating mechanism in the depth direction of the circuit breaker is the maximum value of the size in the depth direction of the circuit breaker, and the first front surface is reduced so as to reduce the size in the depth direction of the circuit breaker. The second front surface of the base corresponding to the upper part of the arc extinguish chamber arrangement area is lifted forwards, and the front wall of the cavity corresponding to the cavity 10 meets the space of the arc extinguish chamber grid sheet in fan-shaped radial arrangement; a secondary terminal is disposed at a front end of the second front surface.
Claims (10)
1. An arc extinguishing chamber, its characterized in that: the arc extinguishing chamber (1) comprises a first arc extinguishing chamber (1-1) and a second arc extinguishing chamber (1-2);
the first arc extinguish chamber (1-1) comprises a first arc isolating plate (1-1-1), a second arc isolating plate (1-1-2) and arc extinguish grid pieces (1-1-3); the arc extinguishing grid plate (1-1-3) is positioned between the first arc isolating plate (1-1-1) and the second arc isolating plate (1-1-2);
the second arc extinguish chamber (1-2) comprises an arc extinguish chamber (1-3), two arc isolating plates (1-4) which are oppositely arranged and tightly attached to two sides of the arc extinguish chamber (1-3), a plurality of arc extinguish grid pieces (1-7) which are arranged between the two arc isolating plates (1-4), arc striking pieces (1-6) above the grid pieces and gas generating materials (1-5).
The first arc extinguish chamber (1-1) is clamped on a fixed contact (4) of the circuit breaker; and the second arc extinguish chamber (1-2) is fixed on the bulge of the static contact (4) and the base (3) of the circuit breaker.
2. Arc chute according to claim 1, characterized in that: the arc-extinguishing chamber (1-3) consists of a first arc-extinguishing chamber (1-3-1) and a second arc-extinguishing chamber (1-3-2).
3. Arc chute according to claim 2, characterized in that: the air outlet of the arc extinguishing chamber (1-3) is an exhaust passage formed by mutually shielding a first arc extinguishing chamber (1-3-1), a first free metal removing filter screen (1-3-3), a first insulating plate (1-3-4), a second free metal removing filter screen (1-3-5), a second insulating plate (1-3-6), a third free metal removing filter screen (1-3-7) and a second arc extinguishing chamber (1-3-2).
4. Arc chute according to claim 1, characterized in that: and a space between the first grid plate of the first arc-extinguishing chamber (1-1) and the arc striking plate (1-6) of the second arc-extinguishing chamber (1-2) is a grid plate arrangement area.
5. Arc chute according to claim 3, characterized in that: the front end of the exhaust channel is wider than the rear end.
6. The arc chute of claim 4, characterized in that: the front end of the exhaust channel is higher than the grid plate arrangement area.
7. The arc chute of claim 5, characterized in that: the grid plate arrangement area is enlarged from inside to outside in the vertical direction inside the circuit breaker.
8. Arc chute according to claim 1, characterized in that: arc extinguishing grid pieces (1-1-3) of the first arc extinguishing chamber (1-1), arc extinguishing grid pieces (1-7) of the second arc extinguishing chamber (1-2) and arc striking pieces (1-6) are sequentially inclined and radially arranged.
9. Arc chute according to claim 1, characterized in that: the structures of the first arc-extinguishing chamber (1-1) and the second arc-extinguishing chamber (1-2) are insulated from the conductor part of the static contact (4) of the circuit breaker.
10. The utility model provides a circuit breaker with explosion chamber which characterized in that: the device comprises an arc extinguish chamber (1), a static contact (4), a moving contact (5), an operating mechanism (6), a release (8), a base (3), a bottom plate (2), a secondary terminal (7) and a face cover (9);
the mounting surfaces of the operating mechanism (6) and the release (8) are lowered to form a first front surface, so that the depth of the circuit breaker is lowered;
a plurality of cavities (10) are formed between the base (3) and the bottom plate (2), and the fixed contact (4), the movable contact (5), the bottom plate (2) and the base (3) form a rear wall (2-1) of the cavities (10);
the static contact (4), the arc extinguish chamber (1) and the moving contact (5) form one pole of the circuit breaker;
the operating mechanism (6) is movably connected with the moving contact (5) and then fixed on the base (3);
the release (8) drives the operating mechanism (6) to open the circuit breaker;
the face guard (9) is fixed on the surface of the base (3) and covers the operating mechanism (6), the release (8) and the secondary terminal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211353726.4A CN115662856A (en) | 2022-11-01 | 2022-11-01 | Arc extinguishing chamber and circuit breaker with arc extinguishing chamber |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211353726.4A CN115662856A (en) | 2022-11-01 | 2022-11-01 | Arc extinguishing chamber and circuit breaker with arc extinguishing chamber |
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| CN115662856A true CN115662856A (en) | 2023-01-31 |
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| CN202211353726.4A Pending CN115662856A (en) | 2022-11-01 | 2022-11-01 | Arc extinguishing chamber and circuit breaker with arc extinguishing chamber |
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| CN (1) | CN115662856A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
-
2022
- 2022-11-01 CN CN202211353726.4A patent/CN115662856A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116313589A (en) * | 2023-04-06 | 2023-06-23 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
| CN116313589B (en) * | 2023-04-06 | 2023-11-17 | 河北宝凯电气股份有限公司 | Arc extinguishing system and circuit breaker |
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