CN214378111U

CN214378111U - Static contact of air-blowing type arc extinguishing

Info

Publication number: CN214378111U
Application number: CN202120580677.2U
Authority: CN
Inventors: 郑东湖
Original assignee: Wenzhou Ruiya Technology Co ltd
Current assignee: Wenzhou Ruiya Technology Co ltd
Priority date: 2021-03-22
Filing date: 2021-03-22
Publication date: 2021-10-08
Anticipated expiration: 2031-03-22

Abstract

The utility model discloses a static contact of air-blowing formula arc extinguishing, including the static contact body, static contact body from the top down includes moving contact bottom plate, moving contact, static contact and static contact bottom plate, its characterized in that in proper order: the improved static contact device is characterized in that a vertically movable insulating rod is arranged on the bottom plate of the static contact, a C-shaped air blowing unit is arranged on one side of the insulating rod, an air storage cavity is arranged in the middle of the air blowing unit, an upper blowing nozzle and a lower blowing nozzle are arranged at two ends of the air blowing unit respectively, the upper blowing nozzle is right opposite to the joint of the movable contact and the static contact, the lower blowing nozzle penetrates through the bottom plate of the static contact and is right opposite to the lower side of the static contact, a piston capable of moving up and down is arranged in the air storage cavity, a connecting rod is arranged on the piston, the other end of the connecting rod is connected with the insulating rod, and an arc extinguishing chamber used for air blowing and arc extinguishing is arranged on the other side of the static contact. The utility model discloses when sound contact is connected, two are stretched out the board and are pressed from both sides the moving contact tightly, make it stable, after the disconnection, blow the unit and can blow in the explosion chamber with electric arc, realize the effect of quick arc extinguishing.

Description

Static contact of air-blowing type arc extinguishing

Technical Field

The utility model relates to a static contact, more specifically says that it relates to a static contact of air-blowing formula arc extinguishing.

Background

In a breaker switch, when a moving contact and a static contact are suddenly disconnected, an electric arc can be formed between the moving contact and the static contact, and the electrodynamic force of the electric arc quickly introduces the electric arc into an arc extinguish chamber to extinguish the electric arc. However, the magnitude of the electromotive force is determined by the magnitude of the breaking current. When the current reaches a critical value, the electrodynamic force is unable to introduce an arc into the arc extinguishing chamber, so that the arc cannot be extinguished. Therefore, how to rapidly introduce the arc into the arc extinguishing chamber is the key for extinguishing the arc, and the arc is automatically started when the circuit breaker is opened, so that the time for the arc to enter the arc extinguishing chamber is very important for improving the safety of the circuit breaker.

SUMMERY OF THE UTILITY MODEL

The utility model provides a static contact of air-blowing type arc extinguishing has simple structure, and the security is high, realizes blowing automatically through the contact and the disconnection of moving contact and static contact and extinguishes electric arc.

In order to achieve the above purpose, the utility model provides a following technical scheme: the utility model provides a static contact of air-blast formula arc extinguishing, includes the static contact body, the static contact body from the bottom up includes moving contact bottom plate, moving contact, static contact and static contact bottom plate in proper order, its characterized in that: the fixed contact base plate is provided with a vertical movable insulating rod, one side of the insulating rod is provided with a C-shaped air blowing unit, the middle of the air blowing unit is provided with an air storage cavity, the two ends of the air blowing unit are respectively provided with an upper blowing nozzle and a lower blowing nozzle, the upper blowing nozzle is right opposite to the joint of the movable contact and the fixed contact, the lower blowing nozzle penetrates through the fixed contact base plate and is right opposite to the lower side of the fixed contact, a piston capable of moving up and down is arranged in the air storage cavity, the piston is matched with the shape of the inner wall of the air storage cavity in shape, the piston is provided with a connecting rod, the other end of the connecting rod is connected with the insulating rod, and the other side of the fixed contact is provided with an arc extinguishing chamber for air blowing and arc extinguishing.

The utility model discloses further set up to: the insulating rod penetrates through the static contact base, and springs are arranged on two sides of the insulating rod at the bottom of the static contact base and are connected with one end of the insulating rod.

The utility model discloses further set up to: the air storage cavity is provided with a strip-shaped channel for the connecting rod to move.

The utility model discloses further set up to: the insulating rod both sides be provided with the contact clamping piece, contact clamping piece one end is certain angle bending, and the other end articulates in the static contact bottom plate, is connected through the flexure strip between contact clamping piece and the static contact bottom plate.

To sum up, the utility model discloses following beneficial effect has:

1. through the blowing unit that increases, when moving contact and static contact disconnection, the insulator spindle drives the piston and removes, blows off the air in the gas storage cavity through last blow gun, blows on the surface of moving contact and static contact, blows in electric arc into the explosion chamber, and the explosion chamber absorbs electric arc, reaches the effect of arc extinguishing, and lower blow gun can also drive the air flow of bottom plate simultaneously for the radiating efficiency improves life.

2. The contact clamping piece can press from both sides tight moving contact bottom plate when the circuit breaker is closed, provides the effect of stabilizing the moving contact, and when the circuit breaker disconnection, the contact surface of slope can accelerate the separating rate between the sound contact and the fixed contact, drives moving back of insulator spindle simultaneously for the speed of extinguishing of electric arc, guarantees the safety of circuit breaker.

Drawings

Fig. 1 is a schematic view of the closed state of the present embodiment.

Fig. 2 is a schematic view of the off state of the present embodiment.

Fig. 3 is a schematic cross-sectional view of a in fig. 1 according to the present embodiment.

Reference numerals: 1. a static contact bottom plate; 2. static contact; 3. a moving contact; 4. a moving contact bottom plate; 5. a blowing unit; 51. a gas storage cavity; 52. an upper blowing nozzle; 53. a lower blowing nozzle; 55. a piston; 56. a connecting rod; 6. an insulating rod; 7. a spring; 8. a contact clip; 81. an elastic sheet; 9. an arc extinguishing chamber.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

The embodiment discloses a static contact 2 for air-blowing arc extinction, as shown in fig. 1-3, a static contact 2 for air-blowing arc extinction comprises a static contact 2 body, the static contact 2 body sequentially comprises a movable contact base plate 4, a movable contact 3, a static contact 2 and a static contact base plate 1 from bottom to top, a vertically movable insulating rod 6 is arranged on the static contact base plate 1, a C-shaped air blowing unit 5 is arranged on one side of the insulating rod 6, an air storage cavity 51 is arranged in the middle of the air blowing unit 5, an upper blowing nozzle 52 and a lower blowing nozzle 53 are respectively arranged at two ends of the air blowing unit 5, the upper blowing nozzle 52 faces to the joint of the movable contact 3 and the static contact 2, the lower blowing nozzle 53 passes through the static contact base plate 1 and faces to the lower part of the static contact 2, a piston 55 capable of moving up and down is arranged in the air storage cavity 51, the piston 55 is matched with the shape of the inner wall of the air storage cavity 51, a connecting rod 56 is arranged on the piston 55, the other end of the connecting rod 56 is connected with the insulating rod 6, the other side of the static contact 2 is provided with an arc extinguish chamber 9 for blowing and extinguishing arc, the insulating rod 6 penetrates through the base of the static contact 2, springs 7 are arranged on two sides of the insulating rod 6 at the bottom of the base of the static contact 2 and connected with one end of the insulating rod 6, the air storage cavity 51 is provided with a strip-shaped channel for the connecting rod 56 to move, contact clamping pieces 8 are arranged on two sides of the insulating rod 6, one end of each contact clamping piece 8 is bent at a certain angle, the other end of each contact clamping piece is hinged to the bottom plate 1 of the static contact, and the contact clamping pieces 8 are connected with the bottom plate 1 of the static contact through elastic pieces 81.

In the embodiment, when the circuit breaker is closed, the movable contact 3 is pressed down to contact the fixed contact 2, the contact clip 8 is pressed to fall to two sides, the elastic piece 81 supports the contact clip 8 through certain elasticity of the elastic piece, meanwhile, the insulating rod 6 is pressed by the movable contact bottom plate 4 to move downwards, the spring 7 at the bottom is pulled, the elasticity of the spring 7 is increased, the insulating rod 6 drives the connecting rod 56 and the piston 55 to move downwards, gas in the gas storage cavity 51 is exhausted from the lower blowing nozzle 53, and the upper blowing nozzle 52 sucks the gas into the gas storage cavity 51; when the circuit breaker is disconnected, the movable contact 3 is separated from the fixed contact 2, under the action of the spring 7, the insulating rod 6 is pushed to move upwards, meanwhile, the contact clamping piece 8 is under the action of the elastic piece 81, a thrust for pushing the movable contact 3 to separate upwards is also provided, the insulating rod 6 drives the connecting rod 56 and the piston 55 to move upwards, gas in the gas storage cavity 51 is exhausted from the upper blowing nozzle 52, the gas blown out from the upper blowing nozzle 52 can effectively blow an electric arc to the arc extinguishing chamber 9, so that the arc extinguishing effect is achieved, the lower blowing nozzle 53 sucks the gas into the gas storage cavity 51 and can drive air below the fixed contact bottom plate 1 to flow, the heat dissipation efficiency is improved to a certain extent, and the stability and the safety of connection between the movable contact and the fixed contact 2 are improved.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, any modification, equivalent replacement, or improvement made within the design concept of the present invention should be included within the protection scope of the present invention.

Claims

1. The utility model provides a static contact (2) of air-blast formula arc extinguishing, includes static contact (2) body, static contact (2) body from the bottom up includes moving contact bottom plate (4), moving contact (3), static contact (2) and static contact bottom plate (1) in proper order, its characterized in that: the improved static contact structure is characterized in that a vertically movable insulating rod (6) is arranged on the static contact base plate (1), a C-shaped air blowing unit (5) is arranged on one side of the insulating rod (6), an air storage cavity (51) is arranged in the middle of the air blowing unit (5), an upper blowing nozzle (52) and a lower blowing nozzle (53) are arranged at two ends of the air blowing unit respectively, the upper blowing nozzle (52) is just opposite to the joint of the movable contact (3) and the static contact (2), the lower blowing nozzle (53) penetrates through the static contact base plate (1) and just opposite to the lower side of the static contact (2), a piston (55) capable of moving up and down is arranged in the air storage cavity (51), the piston (55) is matched with the shape of the inner wall of the air storage cavity (51), a connecting rod (56) is arranged on the piston (55), the other end of the connecting rod (56) is connected with the insulating rod (6), and an arc extinguishing chamber (9) for air blowing and arc extinguishing is arranged on the other side of the static contact (2).

2. A static contact (2) for a gas-blown arc extinction according to claim 1, characterized in that: the insulating rod (6) penetrates through the base of the static contact (2), and springs (7) are arranged on two sides of the bottom of the base of the static contact (2) and located on the insulating rod (6) and connected with one end of the insulating rod (6).

3. A static contact (2) for a gas-blown arc extinction according to claim 1, characterized in that: the air storage cavity (51) is provided with a long strip-shaped channel for the connecting rod (56) to move.

4. A static contact (2) for a gas-blown arc extinction according to claim 1, characterized in that: the insulating rod (6) both sides be provided with contact clamping piece (8), contact clamping piece (8) one end is certain angle bending, and the other end articulates in static contact bottom plate (1), is connected through flexure strip (81) between contact clamping piece (8) and static contact bottom plate (1).