CN211605075U

CN211605075U - Exhaust structure and have its circuit breaker

Info

Publication number: CN211605075U
Application number: CN202020716643.7U
Authority: CN
Inventors: 宿彦荣; 邹城华; 黄佳; 王斌; 任昌宾
Original assignee: Zhejiang Tengen Electric Co Ltd
Current assignee: Zhejiang Tengen Electric Co Ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2020-09-29
Anticipated expiration: 2030-04-30

Abstract

The utility model provides an exhaust structure and a circuit breaker with the same, belonging to the technical field of circuit breakers, wherein the exhaust structure comprises an exhaust channel, an inlet end is communicated with an arc extinguish chamber, and an outlet end is communicated with the outside of a shell; a first guide plate provided in the exhaust passage and having an inclined surface extending in a direction toward an outlet end of the exhaust passage; the utility model provides an exhaust structure, be equipped with first deflector in exhaust passage, first deflector extends towards exhaust passage's exit end, the top of first deflector and exhaust passage's first lateral wall form first intermediate passage, can make residual electric arc and ionized gas pass through first intermediate passage along the inclined plane of first deflector, and simultaneously, because first intermediate passage is narrower, residual electric arc and ionized gas are hardly in returning the arc extinguishing chamber through first intermediate passage, the extending direction of first deflector can prevent that residual electric arc and ionized gas from taking place the backward flow phenomenon.

Description

Exhaust structure and have its circuit breaker

Technical Field

The utility model relates to a circuit breaker technical field, concretely relates to exhaust structure and have its circuit breaker.

Background

The circuit breaker is at the during operation, there is electric arc or ionized gas to produce when contact disconnection or closure, because electric arc itself is exactly a huge electric current, consequently, can set up arc control device in the circuit breaker usually, extinguish electric arc as far as possible, however, under the effect of arc current magnetic field, electric arc still can the outdiffusion, consequently still can set up exhaust structure and arc spout at the circuit breaker, make electric arc or ionized gas can be through exhaust structure and arc spout discharge circuit breaker, at this in-process, if electric arc takes place the backward flow in exhaust structure, still can cause irreversible damage to circuit breaker inner structure.

SUMMERY OF THE UTILITY MODEL

Therefore, the to-be-solved technical problem of the present invention is to overcome the defect that the backflow phenomenon may occur in the exhaust structure of the arc in the circuit breaker, thereby providing an exhaust structure and a circuit breaker having the same.

In order to solve the technical problem, the utility model provides an exhaust structure, include:

the exhaust channel is arranged in a shell of the electric switching device, the inlet end of the exhaust channel is communicated with the arc extinguish chamber, and the outlet end of the exhaust channel is communicated with the outside of the shell;

a first guide plate provided in the exhaust passage and having an inclined surface extending in a direction toward an outlet end of the exhaust passage; the root of the first guide plate is connected with the second side wall of the exhaust channel, and a first middle channel is formed between the top end of the first guide plate and the opposite first side wall of the exhaust channel.

In a preferred embodiment, a first buffer chamber is provided in the exhaust passage upstream of the first guide plate.

As a preferable technical solution, in the first buffer chamber, there is a first arc-shaped side wall opposite to the air outlet of the arc extinguishing chamber.

As a preferred technical solution, the method further comprises: and the second guide plate is vertically arranged in the exhaust channel and is positioned at the downstream of the first guide plate at intervals, and a second middle channel is formed between the second guide plate and a second side wall of the exhaust channel, which is far away from the first middle channel.

In a preferred embodiment, the exhaust passage has a second damper chamber upstream of the second guide plate, and the second damper chamber has a second arc-shaped side wall opposite to the first intermediate passage.

As a preferred solution, the air vent channel is arranged between two inlet terminal chambers or between a signal terminal chamber and an inlet terminal chamber in the housing of the electrical switching device.

As a preferred technical scheme, the side wall of the exhaust passage and the first guide plate are both formed by two groups of baffles which are connected in a staggered manner, and the two groups of baffles are respectively arranged on a front cover and a rear cover of the shell.

As a preferred technical scheme, the side wall of the exhaust passage, the first guide plate and the second guide plate are all formed by two groups of baffles which are connected in a staggered manner, and the two groups of baffles are respectively arranged on a front cover and a rear cover of the shell.

The utility model also provides a circuit breaker, include exhaust structure, still include:

the explosion chamber is internally provided with an arc extinguishing cover, an air guide channel is formed between the arc extinguishing cover and the side wall of the explosion chamber, and an outlet of the air guide channel is communicated with an inlet end of an exhaust channel of the exhaust structure.

As a preferable technical solution, the cross-sectional area of the air guide channel gradually increases toward the outlet.

The utility model discloses technical scheme has following advantage:

1. the exhaust structure provided by the utility model is used for leading out electric arcs generated in the electric switch device, the arc generated in the electric switch is first extinguished by the arc extinguishing chamber, after which there may still be residual arc and ionized gas, which may then enter the exhaust channel through the inlet end and exit the circuit breaker through the outlet end of the exhaust channel, wherein, a first guide plate is arranged in the exhaust channel, the first guide plate extends towards the outlet end of the exhaust channel, the top end of the first guide plate and the first side wall of the exhaust channel form a first middle channel, it is possible to pass the residual arc and the ionized gas along the inclined surface of the first guide plate through the first intermediate passage, and, at the same time, because the first intermediate channel is narrower, the residual electric arc and the ionized gas are difficult to return to the arc extinguishing chamber through the first intermediate channel, and the extending direction of the first guide plate can prevent the residual electric arc and the ionized gas from generating a backflow phenomenon.

2. The utility model provides an exhaust structure, first cushion chamber can delay residual arc and ionized gas's blowout speed, makes residual arc weaken at this in-process as far as possible, makes ionized gas can the lowering temperature, reduces the residual arc and the ionized gas of discharge casing to outside influence.

3. The utility model provides an exhaust structure, first arc lateral wall surface in the first cushion chamber is the arcwall face, can make residual electric arc and ionized gas flow through more smoothly in exhaust structure.

4. The utility model provides an exhaust structure, second deflector are vertical setting in exhaust passage to form the second intermediate passage with the second lateral wall, second deflector and second intermediate passage further prevent that residual arc and ionized gas from taking place the backward flow, guarantee not receive the harm in the arc extinguish chamber.

5. The utility model provides an exhaust structure, the second cushion chamber further delays residual arc and ionized gas's blowout speed, reduces the residual arc and the ionized gas of discharge casing to outside influence.

6. The utility model provides an exhaust passage, the surface of second arc lateral wall are the arcwall face, make behind residual arc and the ionized gas entering second cushion chamber change direction along the arcwall face more easily.

7. The utility model provides an exhaust passage, exhaust passage's inner wall, first deflector and second deflector all constitute through two sets of baffle cross connection, make the protecgulum and the back lid lock of casing finish the back, directly form exhaust passage, and cross connection's mode guarantees exhaust passage's leakproofness.

8. The utility model provides a short circuiter is equipped with the explosion chamber in the circuit breaker, be equipped with the arc extinguishing chamber in the explosion chamber, the arc extinguishing chamber forms the air guide channel with the lateral wall of explosion chamber, during residual electric arc and the ionized gas that make electric arc produce behind the explosion chamber got into exhaust structure along the air guide channel, the sectional area of air guide channel crescent towards the export direction, the air guide channel is connected with exhaust structure and widen gradually, can make residual electric arc and ionized gas get into exhaust structure more easily.

Drawings

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

Fig. 1 is a top view of an exhaust structure provided by the present invention;

fig. 2 is a schematic structural diagram of an exhaust structure provided by the present invention;

fig. 3 is a schematic perspective view of a housing of a circuit breaker according to the present invention;

FIG. 4 is an enlarged view of the point A in FIG. 3;

figure 5 is a schematic perspective view of a second angle of the housing of the circuit breaker of figure 3;

fig. 6 is an enlarged schematic view at B in fig. 5.

Description of reference numerals:

1. a housing; 2. an arc extinguishing chamber; 3. an air guide channel; 4. a first side wall; 5. a second guide plate; 6. a second arcuate sidewall; 7. a first guide plate; 8. a second side wall; 9. a first arcuate sidewall; 10. a wire inlet terminal cavity; 11. signal terminal cavities.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

Example 1

The present embodiment provides a specific embodiment of the air exhausting structure, as shown in fig. 1 and fig. 2, two inlet terminal cavities 10 are provided at intervals in the housing 1 of the electric switching apparatus, and a signal terminal cavity 11 is further provided between the two inlet terminal cavities 10; the exhaust air channel is arranged between two inlet terminal chambers 10 in the housing 1 of the electrical switching device and further between the signal terminal chamber 11 and the one inlet terminal chamber 10 located below.

As shown in fig. 1 and 2, the exhaust channel has a first side wall 4 located above and a second side wall 8 located below, a first guide plate 7 is disposed on the second side wall 8, the first guide plate 7 extends toward the outlet of the exhaust channel, the top end of the first guide plate 7 and the first side wall 4 of the exhaust channel form a first intermediate channel, so that the residual arc and the ionized gas are discharged out of the housing 1 along the exhaust channel, and the inclined first guide plate 7 can block the residual arc and the ionized gas from flowing back.

As shown in fig. 1 and 2, a first buffer chamber is formed in the exhaust channel upstream of the first guide plate 7, the lower side wall of the first buffer chamber is a first arc-shaped side wall 9, and the first buffer chamber is communicated with the gas guide channel 3 in the housing through the first buffer chamber, so that the first buffer chamber can delay the spraying speed of the residual arc and the ionized gas, the residual arc is weakened as much as possible in the process, the ionized gas can reduce the temperature, and the influence of the residual arc and the ionized gas discharged from the housing 1 on the outside is reduced; the surface of the first arc-shaped side wall 9 is an arc-shaped surface, so that residual electric arcs and ionized gases can flow more smoothly in the exhaust structure.

As shown in fig. 1 and 2, a second guide plate 5 is disposed on the first side wall 4 in the exhaust channel, the second guide plate 5 extends vertically toward the second side wall 8, a second intermediate channel is formed between the top end of the second guide plate 5 and the second side wall 8, and the second guide plate 5 and the second intermediate channel are used for further preventing the residual arc and the ionized gas from flowing back, so as to ensure that the arc extinguishing chamber is not damaged.

As shown in fig. 1 and 2, a second buffer chamber is formed upstream of the second guide plate 5 of the exhaust passage, and a second arc-shaped side wall 6 facing the first intermediate passage is formed in the second buffer chamber, so that the ejection speed of the residual arc and the ionized gas can be further delayed by the second buffer chamber, and the influence of the residual arc and the ionized gas exhausted from the housing 1 on the outside can be reduced; the surface of the second arc-shaped side wall 6 is an arc-shaped surface, so that the direction of the residual arc and ionized gas can be changed along the arc-shaped surface after entering the second buffer cavity, and the residual arc and the ionized gas are prevented from being retained in the second buffer cavity.

As shown in fig. 3-6, the first side wall 4, the second side wall 8, the first guide plate 7 and the second guide plate 5 of the exhaust channel are connected by an upper set of baffle plates and a lower set of baffle plates through a staggered arrangement, wherein the upper set of baffle plates are disposed on the front cover of the casing 1, and the lower set of baffle plates are disposed on the rear cover of the casing 1, and the connection mode can make the exhaust channel more airtight.

The working principle of the exhaust structure provided by the embodiment is as follows:

the arc generated in the electric switching device is firstly extinguished by the arc extinguishing chamber, residual arc and ionized gas can still be generated after the arc extinguishing, the residual arc and the ionized gas can enter the exhaust channel through the inlet end and are discharged out of the electric switching device through the outlet end of the exhaust channel, wherein, a first guide plate 7 is arranged in the exhaust channel, the first guide plate 7 extends towards the outlet end of the exhaust channel, the top end of the first guide plate 7 and the first side wall 4 of the exhaust channel form a first middle channel, it is possible to pass the residual arc and the ionized gas along the inclined surface of the first guide plate 7 through the first intermediate passage, and at the same time, since the first intermediate passage is narrow, the residual arc and the ionized gas are difficult to return to the arc extinguishing chamber through the first intermediate passage, and the extending direction of the first guide plate 7 can prevent the residual arc and the ionized gas from generating a backflow phenomenon.

Example 2

This embodiment provides a specific implementation of a circuit breaker, as shown in fig. 2, in which the exhaust structure described in example 1 is provided between the incoming line terminal chamber 10 and the signal terminal chamber 11 below in the circuit breaker.

Still be equipped with the explosion chamber in the circuit breaker, be equipped with arc extinguishing chamber 2 in the explosion chamber, arc extinguishing chamber 2 forms air guide channel 3 with the lateral wall of explosion chamber, during residual electric arc and the ionized gas that makes electric arc produce behind the explosion chamber got into exhaust structure along air guide channel 3, the sectional area of air guide channel 3 crescent towards the export direction, air guide channel 3 is connected with exhaust structure and widen gradually, can make residual electric arc and ionized gas get into exhaust structure more easily.

The operating principle of the circuit breaker that this embodiment provided:

after generating electric arc in the circuit breaker, earlier by the explosion chamber arc extinguishing, during residual electric arc and ionized gas got out from the explosion chamber and got into exhaust structure along the air guide channel 3 that arc extinguishing chamber 2 and explosion chamber lateral wall formed, discharged residual electric arc and ionized gas circuit breaker through exhaust structure.

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

Claims

1. An exhaust structure, comprising:

the exhaust channel is arranged in a shell (1) of the electric switching device, the inlet end of the exhaust channel is communicated with the arc extinguish chamber, and the outlet end of the exhaust channel is communicated with the outside of the shell (1);

a first guide plate (7) provided in the exhaust passage and having an inclined surface extending in a direction toward an outlet end of the exhaust passage; the root of the first guide plate (7) is connected with the second side wall (8) of the exhaust channel, and a first middle channel is formed between the top end of the first guide plate and the opposite first side wall (4) of the exhaust channel.

2. An exhaust structure according to claim 1, characterized in that there is a first buffer chamber in the exhaust passage upstream of the first guide plate (7).

3. An exhaust structure according to claim 2, characterized in that in the first buffer chamber there is a first arc-shaped side wall (9) opposite the outlet opening of the arc extinguishing chamber.

4. The exhaust structure according to any one of claims 1 to 3, further comprising:

and the second guide plate (5) is vertically arranged in the exhaust channel and is positioned at the downstream of the first guide plate (7) at intervals, and a second middle channel is formed between the second guide plate (5) and a second side wall (8) of the exhaust channel, which is far away from the first middle channel.

5. An exhaust structure according to claim 4, characterized in that there is a second buffer chamber in the exhaust channel upstream of the second deflector (5), and in that there is a second curved side wall (6) opposite the first intermediate channel in the second buffer chamber.

6. An exhaust structure according to any of claims 1-3, characterized in that the exhaust channel is arranged between two inlet terminal chambers (10) or between a signal terminal chamber and an inlet terminal chamber (10) in the housing (1) of the electric switching device.

7. Exhaust structure according to any of claims 1-3, characterized in that the side walls of the exhaust channel and the first guide plate (7) are each made up of two sets of baffles in a staggered connection, which are arranged on the front and rear covers of the housing (1), respectively.

8. Exhaust structure according to claim 4, characterized in that the side walls of the exhaust channel, the first guide plate (7) and the second guide plate (5) are each made up of two sets of baffles connected in a staggered manner, the two sets of baffles being provided on the front cover and the rear cover of the casing (1), respectively.

9. A circuit breaker, comprising: the exhaust structure according to any one of claims 1 to 8, further comprising:

the explosion chamber, inside arc extinguishing chamber (2) that is provided with, be formed with air guide channel (3) between the lateral wall of arc extinguishing chamber (2) and explosion chamber, the export of air guide channel (3) with exhaust structure's exhaust passage's entrance point intercommunication.

10. The circuit breaker according to claim 9, characterized in that the cross-sectional area of the air guide channel (3) increases gradually towards the outlet.