CN211980531U - Exhaust structure of circuit breaker - Google Patents

Abstract

An exhaust structure of a circuit breaker comprises a circuit breaker shell with an exhaust port and an arc extinguish chamber, wherein a plurality of exhaust holes for exhausting arc tail gas are formed in the exhaust end of the arc extinguish chamber, and a flow guide part is arranged between the exhaust end of the arc extinguish chamber and the exhaust port of the circuit breaker shell; the water conservancy diversion spare includes the relative baffle that sets up with the exhaust end of explosion chamber, the both sides of baffle are connected with first baffle and second baffle respectively, and first baffle, baffle and second baffle enclose into an installation cavity that is used for installing binding post, the installation cavity is located the baffle one side back to the exhaust hole, just be equipped with the water conservancy diversion structure of intercommunication exhaust hole and gas vent on the lateral wall of water conservancy diversion spare, the water conservancy diversion structure is used for the circuit breaker casing of arc tail gas reposition of redundant personnel discharge for a plurality of buffer space with the lateral wall of water conservancy diversion spare. The utility model relates to an exhaust structure of circuit breaker discharges after shunting electric arc tail gas through the water conservancy diversion spare, avoids making electric arc pass in and out the explosion chamber repeatedly because of the air current is disorderly.

Description

Exhaust structure of circuit breaker

Technical Field

The utility model relates to a low-voltage apparatus technical field, concretely relates to exhaust structure of circuit breaker.

Background

The low-voltage circuit breaker is a switching device and has control and protection functions in a circuit. The low-voltage circuit breaker can be used for connecting and breaking normal load current and overload current and connecting and breaking short-circuit current, so that the low-voltage circuit breaker is widely applied to various levels of feed-out wires of a low-voltage distribution system, power control of various mechanical equipment and control and protection of electric terminals.

The existing circuit breaker mostly extinguishes electric arcs through an arc extinguish chamber, and electric arc tail gas generated after the electric arcs are extinguished in the arc extinguish chamber is exhausted through an exhaust port of a shell of the circuit breaker. In a low-voltage circuit breaker, particularly a high-current shell frame circuit breaker, in a short-circuit breaking process, airflow disorder is often caused due to unsmooth exhaust, so that electric arcs cannot enter an arc extinguish chamber or repeatedly enter and exit the arc extinguish chamber, and breaking tests fail.

Disclosure of Invention

An object of the utility model is to overcome prior art's defect, provide a simple structure, increase buffer space's circuit breaker's exhaust structure.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

an exhaust structure of a circuit breaker comprises a circuit breaker shell with an exhaust port and an arc extinguish chamber arranged in the circuit breaker shell, wherein a plurality of exhaust holes for exhausting arc tail gas are formed in the exhaust end of the arc extinguish chamber, and a flow guide part is arranged between the exhaust end of the arc extinguish chamber and the exhaust port of the circuit breaker shell; the water conservancy diversion spare includes the relative baffle that sets up with the exhaust end of explosion chamber, the both sides of baffle are connected with first baffle and second baffle respectively, and first baffle, baffle and second baffle enclose into an installation cavity that is used for installing binding post, the installation cavity is located the baffle one side back to the exhaust hole, just be equipped with the water conservancy diversion structure of intercommunication exhaust hole and gas vent on the lateral wall of water conservancy diversion spare, the water conservancy diversion structure is used for the circuit breaker casing of arc tail gas reposition of redundant personnel discharge for a plurality of buffer space with the lateral wall of water conservancy diversion spare.

Further, the water conservancy diversion structure includes first water conservancy diversion portion, first water conservancy diversion portion sets up in the baffle and faces the one side in exhaust hole, and first water conservancy diversion portion makes the arc tail gas reposition of redundant personnel back of the explosion chamber exhaust flow along the lateral wall of water conservancy diversion spare.

Further, the first flow guide part is arranged in the middle of the baffle and is parallel to the first partition plate and the second partition plate.

Furthermore, the water conservancy diversion structure includes second water conservancy diversion portion, is provided with at least one second water conservancy diversion portion on the lateral wall of first baffle and the lateral wall of second baffle respectively, and second water conservancy diversion portion divide into two buffer space with the lateral wall of first baffle, the lateral wall of second baffle at least, and the electric arc tail gas that flows along first baffle lateral wall, second baffle lateral wall is discharged from the gas vent respectively under the reposition of redundant personnel effect of second water conservancy diversion portion.

Further, the circuit breaker casing includes base and the lid, first baffle is located the one side that is close to the lid and keeps parallel with the lid, and the second baffle is located the one side that is close to the base and keeps parallel with the base, the water conservancy diversion structure is the protruding structure of protrusion in water conservancy diversion spare lateral wall, and protruding structure on first baffle and the second baffle offsets the cooperation with base and base respectively and forms the water conservancy diversion passageway.

Further, the baffle is curved baffle, the arc convex surface of baffle makes electric arc tail gas flow towards first baffle, second baffle along the arc of baffle towards the exhaust end of explosion chamber.

Furthermore, one end of the first partition board and one end of the second partition board are connected together to form a closed connecting end of the installation cavity, and the other ends of the first partition board and the second partition board are kept parallel and opposite to each other to serve as an open connecting end of the installation cavity.

The flow guide piece comprises a U-shaped body and an arc-shaped baffle, the edges of two side walls of the U-shaped body are connected together through the baffle to form a three-surface closed installation cavity, the open end of the U-shaped body is used as the open connecting end of the installation cavity, the connected end of the U-shaped body is used as the closed connecting end of the installation cavity, the two side walls of the U-shaped body are respectively used as a first partition plate and a second partition plate, the arc-shaped concave surface of the baffle is used as one inner side wall of the installation cavity, a strip-shaped bulge is arranged in the middle of the arc-shaped convex surface of the baffle in a protruding mode, and the strip; the outer side walls of the first partition plate and the second partition plate are respectively provided with a plurality of strip-shaped convex ribs which are arranged at intervals, and the strip-shaped convex ribs are used as second flow guide parts of the flow guide structure.

Further, be equipped with the protruding muscle of three interval arrangement's bar on the lateral wall of first baffle, second baffle respectively, the protruding muscle of three bar is first protruding muscle, the protruding muscle of second and the protruding muscle of third respectively, the one end of the protruding muscle of first protruding muscle, second and the protruding muscle of third is buckled to the gas vent direction of circuit breaker casing respectively, and the other end all links up with first water conservancy diversion portion.

Furthermore, the length of the U-shaped body is greater than that of the baffle, and a notch is formed in one side, close to the open connecting end, of the baffle.

The utility model relates to an exhaust structure of circuit breaker compares current circuit breaker inner structure, through add a water conservancy diversion spare that can install binding post in the circuit breaker casing, increases electric arc tail gas's the space that flows through rational utilization installation binding post around, simultaneously, the water conservancy diversion structure of water conservancy diversion spare can be shunted the back with the electric arc tail gas from explosion chamber exhaust and discharge, avoids reducing the arc extinguishing ability of explosion chamber because of the air current is disorderly.

In addition, the baffle of water conservancy diversion spare adopts curved baffle to do benefit to electric arc tail gas along first baffle of baffle flow direction, second baffle, reduces the interference to electric arc tail gas flow, does benefit to electric arc tail gas discharge circuit breaker casing, corresponding improvement the arc extinguishing ability of explosion chamber.

Drawings

Fig. 1 is a schematic structural view (plane) of an exhaust structure of a circuit breaker according to the present invention;

fig. 2 is a schematic structural view (front side) of a diversion member in an exhaust structure of a circuit breaker according to the present invention;

fig. 3 is a schematic structural view (reverse side) of a diversion member in an exhaust structure of a circuit breaker according to the present invention;

fig. 4 is a schematic structural diagram (perspective) of an exhaust structure of the circuit breaker of the present invention.

Detailed Description

The following describes a specific embodiment of the exhaust structure of the circuit breaker according to the present invention with reference to the embodiments shown in fig. 1 to 4. The present invention is not limited to the description of the following embodiments.

An exhaust structure of a circuit breaker comprises a circuit breaker shell with an exhaust port and an arc extinguish chamber 2 arranged in the circuit breaker shell, wherein a plurality of exhaust holes 2a used for exhausting arc tail gas are arranged at the exhaust end of the arc extinguish chamber 2, and a flow guide piece 3 is arranged between the exhaust end of the arc extinguish chamber 2 and the exhaust port of the circuit breaker shell; the water conservancy diversion spare 3 includes the relative baffle 33 that sets up with the exhaust end of explosion chamber 2, the both sides of baffle 33 are connected with first baffle 31 and second baffle 32 respectively, and first baffle 31, baffle 33 and second baffle 32 enclose into a mounting chamber 4 that is used for installing binding post, mounting chamber 4 is located baffle 33 one side back to exhaust hole 2a, just be equipped with the water conservancy diversion structure of intercommunication exhaust hole 2a and gas vent on the lateral wall of water conservancy diversion spare 3, the water conservancy diversion structure is separated the lateral wall of water conservancy diversion spare 3 for a plurality of buffer space is used for shunting the electric arc tail gas and discharges the circuit breaker casing.

The utility model relates to an exhaust structure of circuit breaker compares current circuit breaker inner structure, through add one can install binding post's water conservancy diversion spare 3 in the circuit breaker casing, space around installing binding post through rational utilization increases the mobile space of electric arc tail gas, and simultaneously, the water conservancy diversion structure of water conservancy diversion spare 3 can be shunted the back with the electric arc tail gas from 2 exhaust arc extinguishing chambers and discharge, avoids making electric arc pass in and out 2 arc extinguishing chambers's arc extinguishing ability repeatedly because of the air current is disorderly.

As shown in fig. 1 to 4, an exhaust structure of a circuit breaker includes a circuit breaker housing provided with an exhaust port (not shown) and an arc extinguishing chamber 2 disposed in the circuit breaker housing, the circuit breaker housing includes a base 11 and a cover 12, a plurality of exhaust holes 2a for exhausting arc tail gas are provided at an exhaust end of the arc extinguishing chamber 2, and a flow guide member 3 is disposed between the exhaust end of the arc extinguishing chamber 2 and the exhaust port of the circuit breaker housing; the flow guide part 3 comprises a baffle 33 opposite to the exhaust end of the arc extinguish chamber 2, two sides of the baffle 33 are respectively connected with a first partition plate 31 and a second partition plate 32, the first partition plate 31, the baffle 33 and the second partition plate 32 enclose a mounting cavity 4 for mounting a wiring terminal, the mounting cavity 4 is positioned on one side of the baffle 33 back to the exhaust hole 2a, preferably, the first partition plate 31 is positioned on one side close to the cover body 12 and parallel to the cover body 12, the second partition plate 32 is positioned on one side close to the base 11 and parallel to the base 11, further, one end of the first partition plate 31 and one end of the second partition plate 32 are connected together to form a closed connecting end of the mounting cavity 4, the closed connecting end prevents electric arcs from entering the mounting cavity 4 to ablate the wiring terminal, the other ends of the first partition plate 31 and the second partition plate 32 are kept parallel and opposite to serve as an open connecting end of the mounting cavity, a binding screw for the binding post passes through.

Be equipped with the water conservancy diversion structure of intercommunication exhaust hole 2a and gas vent on water conservancy diversion piece 3's the lateral wall, the water conservancy diversion structure separates the lateral wall of water conservancy diversion piece 3 for a plurality of buffer space is used for shunting discharge arc tail gas circuit breaker housing, and preferred water conservancy diversion structure sets up in the protruding structure of water conservancy diversion piece 3 lateral wall for the protrusion, and protruding structure on first baffle 31 and the second baffle 32 offsets the cooperation with base 11 and base 11 respectively and forms the water conservancy diversion passageway, sets up a plurality of gas vents on circuit breaker housing and is used for cooperateing with the water conservancy diversion structure in order to increase the ability of circuit breaker discharge arc tail gas, promotes explosion extinguishing chamber 2's arc extinguishing. Of course, the diversion structure may also be a groove structure recessed in the side wall of the diversion member 3, but when the diversion structure is the groove structure, the flow space of the arc tail gas may be reduced, and the processing difficulty of the diversion member 3 at this time is higher.

The water conservancy diversion structure includes first water conservancy diversion portion 3a, first water conservancy diversion portion 3a sets up in the one side that baffle 33 faces exhaust hole 2a, and first water conservancy diversion portion 3a makes the outer lateral wall of following water conservancy diversion spare 3 flow behind the reposition of redundant personnel of explosion chamber 2 exhaust electric arc tail gas. Preferably, the first flow guiding portion 3a is disposed in the middle of the baffle 33, specifically, as shown in fig. 3, the first flow guiding portion 3a is a protruding structure, and the first flow guiding portion 3a is parallel to the first partition plate 31 and the second partition plate 32, and preferably, the baffle 33 is equally divided by the first flow guiding portion 3 a.

The water conservancy diversion structure includes second water conservancy diversion portion 3b, be provided with at least one second water conservancy diversion portion 3b on the lateral wall of first baffle 31 and the lateral wall of second baffle 32 respectively, second water conservancy diversion portion 3b is with the lateral wall of first baffle 31, the lateral wall of second baffle 32 divide into two buffer space at least, along first baffle 31 lateral wall, the electric arc tail gas that second baffle 32 lateral wall flows is discharged from the gas vent respectively under the reposition of redundant personnel effect of second water conservancy diversion portion 3b, preferred second water conservancy diversion portion 3b is the protruding muscle that the protrusion set up, second water conservancy diversion portion 3b is preferred to link up mutually with first water conservancy diversion portion 3a so that it to do benefit to the reposition of redundant personnel effect of reinforcing water conservancy diversion structure to electric arc tail gas.

The baffle 33 is preferably an arc-shaped baffle 33, the arc-shaped convex surface of the baffle 33 faces the exhaust end of the arc-extinguishing chamber 2, the arc-shaped surface of the baffle 33 is matched with the connecting structure of the first flow guiding part 3a and the second flow guiding part 3b, so that the arc tail gas flows smoothly when flowing to the first partition plate 31 and the second partition plate 32 along the baffle 33, and the arc-shaped baffle 33 enables the resistance of the arc tail gas in the flowing process to be small. Of course, the baffle 33 may not be curved, but may interfere with the flow of the arc exhaust.

The best embodiment of a diversion piece 3 is provided with an arc extinguish chamber 2 in a breaker shell, one end of the arc extinguish chamber 2 is provided with a plurality of exhaust holes 2a as an exhaust end, the breaker shell opposite to the exhaust holes 2a is provided with a plurality of exhaust ports, the diversion piece 3 is arranged in a space between the exhaust ports and the exhaust holes 2a, the diversion piece 3 is provided with an installation cavity 4 for installing a wiring terminal, the wiring terminal is combined with the diversion piece 3 through the installation cavity 4, compared with the existing breaker structure, the diversion piece 3 uses the space around the wiring terminal for discharging arc tail gas, and the buffer space in the shell is increased.

As shown in fig. 2 and 3, the flow guide member 3 includes a U-shaped body and an arc-shaped baffle 33, which are integrally formed, two side wall edges of the U-shaped body are connected together through the baffle 33 to form a three-sided closed installation cavity 4, an open end of the U-shaped body is used as an open connection end of the installation cavity 4, and an end of the U-shaped body connected together is used as a closed connection end of the installation cavity 4, and preferably, installation screw holes adapted to be installed in a circuit breaker housing are formed in the open connection end and the closed connection end; two side walls of the U-shaped body are respectively used as a first partition plate 31 and a second partition plate 32, an arc concave surface of a baffle plate 33 is used as one inner side wall of the installation cavity 4, a strip-shaped bulge is convexly arranged in the middle of an arc convex surface of the baffle plate 33, and the strip-shaped bulge is used as a first flow guide part 3a of the flow guide structure; the outer side walls of the first partition plate 31 and the second partition plate 32 are respectively provided with three strip-shaped convex ribs which are arranged at intervals, and the strip-shaped convex ribs are used as a second flow guide part 3b of the flow guide structure.

The length of U-shaped body is greater than the length of baffle 33, so make two lateral walls of U-shaped body as first baffle 31, the cooperation of second baffle 32 card go into the space in the circuit breaker casing, make first baffle 31, second baffle 32 can link up with the gas vent that sets up on the circuit breaker casing, block that electric arc gas flows into installation cavity 4 in, make electric arc tail gas follow first baffle 31, second baffle 32 flow direction gas vent. Baffle 33 is equipped with the breach in the one side that is close to open link, three bar protruding muscle is first protruding muscle, the protruding muscle of second and the protruding muscle of third respectively, the one end of first protruding muscle, the protruding muscle of second and the protruding muscle of third is buckled to the gas vent direction of circuit breaker casing respectively, and the other end all links up with first water conservancy diversion portion 3 a.

Specifically, as shown in fig. 4, an arrow in the figure is a flow direction of the arc tail gas, one end of the first convex rib is bent toward the exhaust port at the upper part of the circuit breaker housing, and the bent part of the first convex rib avoids the mounting screw hole arranged at the open connection end, so that the arc tail gas is directly exhausted from the exhaust port at the upper part of the circuit breaker housing; the second convex rib and the third convex rib are respectively bent towards an exhaust port at the lower part of the circuit breaker shell, and one end of the third convex rib extends to the edge of the U-shaped body to be connected with the exhaust port at the lower part of the circuit breaker shell, so that the arc gas between the second convex rib and the third convex rib flows from the exhaust port at the lower part of the circuit breaker shell; due to the blocking effect of the third convex rib, the arc tail gas between the third convex rib and the bottom of the breaker shell is discharged through the exhaust port arranged at the bottom of the breaker shell.

In the figure, the side of the circuit breaker provided with the handle is the upper part of the circuit breaker, the side opposite to the handle is the bottom part of the circuit breaker, and an arrow in the figure indicates the flowing direction of the arc tail gas. The embodiment provides only one arrangement mode of the second flow guiding parts 3b, the number of the second flow guiding parts 3b is set according to the exhaust number and the exhaust position of the breaker opening shell, and the bending direction of the strip-shaped convex rib serving as the second flow guiding part 3b is also bent according to the exhaust position of the breaker shell.

The foregoing is a more detailed description of the present invention, taken in conjunction with the specific preferred embodiments thereof, and it is not intended that the invention be limited to the specific embodiments shown and described. To the utility model belongs to the technical field of ordinary technical personnel, do not deviate from the utility model discloses under the prerequisite of design, can also make a plurality of simple deductions or replacement, all should regard as belonging to the utility model discloses a protection scope.

Claims (10)

1. The utility model provides an exhaust structure of circuit breaker, is including the circuit breaker casing that is equipped with the gas vent and set up explosion chamber (2) in the circuit breaker casing the exhaust end of explosion chamber (2) is equipped with a plurality of exhaust holes (2a) that are used for discharging electric arc tail gas, its characterized in that: a flow guide part (3) is arranged between the exhaust end of the arc extinguish chamber (2) and the exhaust port of the breaker shell; the utility model discloses a breaker, including arc extinguishing chamber (2), baffle (33) that the exhaust end of water conservancy diversion spare (3) set up relatively, the both sides of baffle (33) are connected with first baffle (31) and second baffle (32) respectively, and first baffle (31), baffle (33) and second baffle (32) enclose into one and are used for installing binding post installation cavity (4), installation cavity (4) are located one side of baffle (33) back to exhaust hole (2a), just be equipped with the water conservancy diversion structure of intercommunication exhaust hole (2a) and gas vent on the lateral wall of water conservancy diversion spare (3), the water conservancy diversion structure is used for the branch of arc tail gas to discharge the circuit breaker casing for a plurality of buffer space with the lateral wall of water conservancy diversion spare (3).

2. The exhaust structure of a circuit breaker according to claim 1, wherein: the water conservancy diversion structure includes first water conservancy diversion portion (3a), first water conservancy diversion portion (3a) set up in baffle (33) one side facing exhaust hole (2a), and first water conservancy diversion portion (3a) make the outer lateral wall of following water conservancy diversion spare (3) flow behind the reposition of redundant personnel of explosion chamber (2) exhaust electric arc tail gas.

3. The exhaust structure of a circuit breaker according to claim 2, wherein: the first flow guide part (3a) is arranged in the middle of the baffle (33), and the first flow guide part (3a) is parallel to the first partition plate (31) and the second partition plate (32).

4. The exhaust structure of a circuit breaker according to claim 1, wherein: the flow guide structure comprises a second flow guide part (3b), at least one second flow guide part (3b) is arranged on the outer side wall of the first partition plate (31) and the outer side wall of the second partition plate (32) respectively, the outer side wall of the first partition plate (31) and the outer side wall of the second partition plate (32) are divided into at least two buffer spaces by the second flow guide part (3b), and arc tail gas flowing along the outer side wall of the first partition plate (31) and the outer side wall of the second partition plate (32) is discharged from the exhaust port under the shunting action of the second flow guide part (3b) respectively.

5. The exhaust structure of a circuit breaker according to claim 1, wherein: the circuit breaker casing includes base (11) and lid (12), first baffle (31) are located the one side of being close to lid (12) and keep parallel with lid (12), and second baffle (32) are located the one side of being close to base (11) and keep parallel with base (11), the water conservancy diversion structure is the protruding structure of protrusion in water conservancy diversion spare (3) lateral wall, and protruding structure on first baffle (31) and second baffle (32) offsets cooperation with base (11) and base (11) respectively and forms the water conservancy diversion passageway.

6. The exhaust structure of a circuit breaker according to claim 1, wherein: baffle (33) are curved baffle (33), the arc convex surface of baffle (33) makes electric arc tail gas flow towards first baffle (31), second baffle (32) along the arc of baffle (33) towards the exhaust end of explosion chamber (2).

7. The exhaust structure of a circuit breaker according to claim 1, wherein: one ends of the first partition plate (31) and the second partition plate (32) are connected together to form a closed connecting end of the mounting cavity (4), and the other ends of the first partition plate (31) and the second partition plate (32) are kept in parallel and are oppositely used as an open connecting end of the mounting cavity (4).

8. The exhaust structure of a circuit breaker according to claim 1, wherein: the flow guide part (3) comprises a U-shaped body and an arc-shaped baffle (33), the edges of two side walls of the U-shaped body are connected together through the baffle (33) to form a three-surface closed installation cavity (4), the open end of the U-shaped body is used as the open connecting end of the installation cavity (4), the connected end of the U-shaped body is used as the closed connecting end of the installation cavity (4), the two side walls of the U-shaped body are respectively used as a first partition plate (31) and a second partition plate (32), the arc-shaped concave surface of the baffle (33) is used as one inner side wall of the installation cavity (4), a strip-shaped bulge is convexly arranged in the middle of the arc-shaped convex surface of the baffle (33), and the strip-shaped bulge is used as a first; the outer side walls of the first partition plate (31) and the second partition plate (32) are respectively provided with a plurality of strip-shaped convex ribs which are arranged at intervals, and the strip-shaped convex ribs are used as second flow guide parts (3b) of the flow guide structure.

9. The exhaust structure of a circuit breaker according to claim 8, wherein: the protruding muscle of three interval arrangement's bar is equipped with respectively on the lateral wall of first baffle (31), second baffle (32), the protruding muscle of three bar is first protruding muscle, the protruding muscle of second and the protruding muscle of third respectively, the one end of first protruding muscle, the protruding muscle of second and the protruding muscle of third is buckled to the gas vent direction of circuit breaker casing respectively, and the other end all links up with first water conservancy diversion portion (3 a).

10. The exhaust structure of a circuit breaker according to claim 8, wherein: the length of the U-shaped body is greater than that of the baffle (33), and a notch is formed in one side, close to the open connecting end, of the baffle (33).

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