CN210272210U

CN210272210U - Circuit breaker with arc discharge function and shell thereof

Info

Publication number: CN210272210U
Application number: CN201920983873.7U
Authority: CN
Inventors: 邓应尝; 胡金利; 高建
Original assignee: Shanghai Yongji Electrical Holding Co ltd
Current assignee: Shanghai Yongji Electrical Holding Co ltd
Priority date: 2019-06-27
Filing date: 2019-06-27
Publication date: 2020-04-07
Anticipated expiration: 2029-06-27

Abstract

The utility model relates to a circuit breaker and casing with discharge arc function the utility model discloses an in the circuit breaker casing with discharge arc function, owing to be equipped with discharge passage in the casing, discharge passage arc-striking section's oral area is towards the contact position of circuit breaker moving contact and static contact, discharge passage output section and external space intercommunication, thus, if circuit breaker moving contact and static contact separately produced electric arc, will make near the pressure increase of circuit breaker moving contact and static contact, electric arc will follow the oral area entering discharge passage of arc-striking section and discharge external space, be favorable to electric arc to extinguish like this, prevent that circuit breaker internals from being burnt out.

Description

Circuit breaker with arc discharge function and shell thereof

Technical Field

The utility model relates to a circuit breaker with discharge electric arc function and casing thereof.

Background

The backup protector of the surge protector is required to bear the impact of short-time large energy, particularly when the lightning with large energy flows through the protector, the movable contact is repelled under the action of strong electric repulsion force, strong electric arcs are generated at the contact position of the movable contact and the fixed contact of the contact device of the circuit breaker, if the energy is not absorbed or discharged in time, the internal parts of the switch are seriously affected, even the protector fails, and therefore, the exhaust is particularly important.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model is to provide a circuit breaker and casing with discharge arc function is favorable to discharging the electric arc that circuit breaker moving contact and static contact produced smoothly.

In order to achieve the above object, the utility model provides a circuit breaker casing with discharge arc function adopts following technical scheme: a discharge channel is arranged in the shell and comprises an arc striking section and an output section, the mouth of the arc striking section faces the contact position of a moving contact and a fixed contact of the circuit breaker, and the output section is communicated with an external space.

Preferably, the cross-sectional area of the ignition section enlarges towards the opening.

Preferably, the output section is provided with a partition wall extending in the length direction of the output section, the partition wall dividing the output section into a first passage and a second passage.

Preferably, the arc striking section is provided with an arc striking surface, the arc striking surface faces the contact position of the moving contact and the fixed contact of the circuit breaker, and the arc striking surface is tangent to the side wall of the output section.

Preferably, when the moving contact and the fixed contact of the circuit breaker are separated, the end part of the moving contact of the circuit breaker moves to the vicinity of the mouth part of the arc ignition section.

The invention also provides a circuit breaker with the function of discharging the electric arc, which corresponds to the circuit breaker shell with the function of discharging the electric arc, and comprises the circuit breaker shell with the function of discharging the electric arc and the contact device, wherein the mouth part of the arc leading section faces to the contact position of the moving contact and the static contact of the contact device.

As described above, the utility model relates to a circuit breaker with discharge arc function and casing thereof has following beneficial effect: in the circuit breaker shell with the function of discharging the electric arc, the discharge channel is arranged in the shell, the opening of the arc striking section of the discharge channel faces the contact position of the moving contact and the fixed contact of the circuit breaker, and the output section of the discharge channel is communicated with the external space, so that if the moving contact and the fixed contact of the circuit breaker are separated to generate the electric arc, the pressure near the moving contact and the fixed contact of the circuit breaker is increased, the electric arc enters the discharge channel from the opening of the arc striking section and is discharged to the external space, the electric arc is extinguished, and the internal parts of the circuit breaker are prevented from being burnt.

Drawings

Fig. 1 shows a schematic structural diagram of the circuit breaker with the arc discharge function of the present invention, and the operating mechanism and tripping mechanism of the circuit breaker are not shown.

Fig. 2 shows a partial schematic view of the contact arrangement and the drain channel portion of fig. 1.

Fig. 3 is a partial schematic view of the vent passage portion of fig. 1.

Description of the element reference numerals

1 casing

2 moving contact

3 static contact

4 discharge channel

5 arc striking segment

6 output section

7 partition wall

8 first channel

9 second channel

10 mouth of arc striking section

11 arc striking surface

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

The circuit breaker shell with the function of discharging electric arcs is used for a circuit breaker, and the circuit breaker is provided with components such as an operating mechanism, a tripping device, a contact device and the like, wherein only a moving contact 2 and a fixed contact 3 of the contact device are shown in figure 1, and the other components such as the operating mechanism, the tripping device and the like are not shown.

As shown in fig. 1 to 3, the utility model provides a circuit breaker housing with discharge arc function adopts following technical scheme: a discharge channel 4 is arranged in a shell 1, the discharge channel 4 comprises an arc striking section 5 and an output section 6, a mouth 10 of the arc striking section faces to the contact position of a moving contact 2 and a fixed contact 3 of a circuit breaker, and the output section 6 is communicated with an external space.

Referring to fig. 1 to 3, in the circuit breaker housing with the function of discharging an arc according to the present invention, since the discharge channel 4 is disposed in the housing 1, the mouth 10 of the arc striking section of the discharge channel 4 faces the contact position of the moving contact 2 and the static contact 3 of the circuit breaker, and the output section 6 of the discharge channel 4 is communicated with the external space, if an arc is generated when the moving contact 2 and the static contact 3 of the circuit breaker are separated, the pressure near the moving contact 2 and the static contact 3 of the circuit breaker is increased, and the arc enters the discharge channel 4 from the mouth 10 of the arc striking section and is discharged to the external space, which is beneficial to extinguishing the arc and prevents internal parts of the circuit breaker from being burned out.

In the case of the circuit breaker with the function of discharging electric arc, after the circuit breaker is assembled, the mouth 10 of the arc-striking section of the discharge channel 4 is positioned near the moving contact 2 and the static contact 3, and faces to the contact position of the moving contact 2 and the static contact 3, when the moving contact 2 and the static contact 3 of the circuit breaker are separated, the end of the moving contact 2 of the circuit breaker moves to the vicinity of the mouth 10 of the arc-striking section, at this time, the mouth 10 of the arc-striking section of the discharge passage 4 faces the gap between the moving contact 2 and the fixed contact 3, if an arc is generated between the moving contact 2 and the fixed contact 3, the temperature of the gap between the moving contact 2 and the fixed contact 3 and the temperature in the vicinity thereof will increase and the gas pressure will increase, the discharge passage 4 is connected to the outside, and the gas pressure of the discharge passage 4 and the outside space is relatively small, so that the arc enters the discharge passage 4 from the mouth 10 of the arc striking section and is discharged to the outside space. For example, when a lightning strike large current passes through the breaker, the moving contact 2 and the static contact 3 are repelled, an electric arc is generated at the contact position of the moving contact 2 and the static contact 3, the pressure near the moving contact 2 and the static contact 3 is increased sharply, and at the moment, the electric arc is diffused to a region with low pressure and is discharged to the external space from the discharge channel 4.

In order to make it easier for the arc to enter the discharge channel 4 from the mouth 10 of the run-on section of the discharge channel 4, as a preferred embodiment, the cross-sectional area of the run-on section 5 is enlarged towards the opening, as shown in fig. 1 to 3, so that the mouth 10 of the run-on section of the discharge channel 4 is larger and the arc can enter the discharge channel 4 more easily. More preferably, as shown in fig. 3, the arc ignition section 5 has an arc ignition face 11, the arc ignition face 11 faces the contact position of the movable contact 2 and the fixed contact 3 of the circuit breaker, and the arc ignition face 11 is tangent to the side wall of the output section 6. Thus, the arc-shaped arc-leading surface 11 acts like a runway and guides the arc, and the arc can smoothly enter the discharge passage 4 under the guidance of the arc-shaped arc-leading surface 11.

In order to enable the arc to be extinguished more quickly, as a preferred embodiment, as shown in fig. 1 to 3, the output section 6 is provided with a partition wall 7 extending along the length of the output section 6, and the partition wall 7 divides the output section 6 into a first passage 8 and a second passage 9. Thus, the arc is divided by the partition wall 7 to be small after entering the discharge passage 4, and the arc is easily extinguished. The number and the specific form of the partition walls 7 can be set according to the actual needs, and in any case, the output section 6 of the discharge channel 4 can be divided into several channels, so that the arc is divided into smaller volumes to facilitate arc extinction. Moreover, the arc is divided into smaller volumes, so that the external fuse wire can be prevented from being blown due to the concentrated arc, and on the other hand, foreign matters with certain external volumes can be prevented from entering the interior of the shell 1 through the discharge channel 4, so that the performance of the circuit breaker is prevented from being adversely affected.

Corresponding to the circuit breaker housing with the function of discharging the arc, the invention also provides a circuit breaker with the function of discharging the arc, which comprises the circuit breaker housing with the function of discharging the arc and the contact device, wherein the mouth part 10 of the arc-leading section faces to the contact position of the moving contact 2 and the static contact 3 of the contact device.

Based on the technical scheme of the embodiment, the circuit breaker with the arc discharge function is beneficial to smoothly discharging the arc generated by the moving contact 2 and the static contact 3 of the circuit breaker, and has the advantages of simple structure and lower cost.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. A circuit breaker shell with an arc discharge function is characterized in that a discharge channel is arranged in the shell and comprises an arc ignition section and an output section, the mouth of the arc ignition section faces the contact position of a moving contact and a fixed contact of a circuit breaker, and the output section is communicated with an external space.

2. The circuit breaker housing with a discharge arc function as recited in claim 1, wherein: the cross-sectional area of the ignition section is enlarged towards the opening.

3. The circuit breaker housing with a discharge arc function as recited in claim 1, wherein: the output section is provided with a partition wall extending along the length direction of the output section, and the partition wall divides the output section into a first channel and a second channel.

4. The circuit breaker housing with a discharge arc function as recited in claim 1, wherein: the arc striking section is provided with an arc striking surface, the arc striking surface faces to the contact position of a moving contact and a fixed contact of the breaker, and the arc striking surface is tangent to the side wall of the output section.

5. The circuit breaker housing with a discharge arc function as recited in claim 1, wherein: when the moving contact and the fixed contact of the circuit breaker are separated, the end part of the moving contact of the circuit breaker moves to the position near the mouth of the arc striking section.

6. A circuit breaker with arc discharge function, comprising the circuit breaker shell with arc discharge function and the contact device of any one of claims 1 to 5, wherein the mouth of the arc ignition section faces the contact position of the moving contact and the static contact of the contact device.