CN210378949U

CN210378949U - Arc extinguishing chamber

Info

Publication number: CN210378949U
Application number: CN201921716436.5U
Authority: CN
Inventors: 古鑫华; 刘书章
Original assignee: Churod Electronics Wuhu Co ltd
Current assignee: Churod Electronics Wuhu Co ltd
Priority date: 2019-10-14
Filing date: 2019-10-14
Publication date: 2020-04-21
Anticipated expiration: 2029-10-14

Abstract

The utility model discloses an arc extinguish chamber, it includes casing, inlet wire static contact, the static contact of being qualified for the next round of competitions, connects magazine, moving contact and moving contact push rod, and wherein, the internal surface of casing is provided with high temperature resistant anti-adhesion coating, and high temperature resistant anti-adhesion coating is used for blocking the contact of the metal splash that electric arc produced and casing internal surface. According to the arc extinguish chamber, the high-temperature-resistant anti-adhesion coating is arranged on the inner surface of the shell, so that metal splashes generated by electric arcs are not easily adhered to the inner wall of the shell in the working process of the relay, and the reliability of the relay is improved; the burning of metal splashes on the inner surface of the shell is reduced by the heat insulation of the high-temperature-resistant anti-adhesion coating, so that the service life of the relay is prolonged, and the safe use of the relay is ensured; in addition, the structure in the arc extinguishing chamber is simple, and the production cost of the relay is low, so that the market competitiveness of the product is improved.

Description

Arc extinguishing chamber

Technical Field

The utility model relates to a relay technical field especially relates to an explosion chamber

Background

The relay is also called as relay, and is an important electronic component in an automatic control circuit, and the relay regulates the current in the circuit through an input loop and an output loop inside the relay, so as to achieve the purposes of safety protection and circuit conversion, and realize the safety connection between different electrical components. In the relay use, electric arc easily appears when the contact of relay breaks off, and the temperature of electric arc is higher, the contact of relay of easily burning for the time extension of relay open circuit, and then the effective use of influence relay, the influence range of electric arc is mainly limited through the explosion chamber at present. The arc chute is a contact surrounding the relay switch and serves to limit the spatial location of the arc and to accelerate the arc extinction, thereby attenuating the impact of the arc on the relay performance.

However, in the use process of the arc extinguish chamber of the conventional relay, an arc is generated at the contact in the arc extinguish chamber, so that under the action of electric corrosion of the arc, metal substances on the surface of the contact are easy to peel off and high-temperature metal splashes are generated, and the metal splashes are attached to the surface of an insulating material in the inner cavity of the arc extinguish chamber, so that the resistance of the insulating material is reduced, and the insulation performance of the relay is affected. At present, mainly block the contact of metal splash and insulating material through increase separation rib, separation groove or add insulating barrier in the arc extinguish chamber to eliminate the influence of metal splash to the relay performance, however, this kind of mode of blocking will cause the whole high increase of relay product, and the inside spare part structure of relay is complicated, and manufacturing cost is higher, is unfavorable for improving the market competition of product.

SUMMERY OF THE UTILITY MODEL

Therefore, it is necessary to provide an arc extinguish chamber aiming at the technical problems of complex structure and high production cost.

An arc extinguish chamber comprises a shell, an incoming line static contact, an outgoing line static contact, a material receiving box, a moving contact and a moving contact push rod, wherein the shell is provided with a containing groove, one surface of the shell, which is back to a notch of the containing groove, is respectively provided with a wire inlet and a wire outlet, the wire inlet and the wire outlet are respectively communicated with the containing groove, the incoming line static contact penetrates through the wire inlet and is abutted against the edge of the wire inlet, the outgoing line static contact penetrates through the wire outlet and is abutted against the edge of the wire outlet, the material receiving box is positioned at the notch of the containing groove and is connected with the shell, the moving contact is arranged between the incoming line static contact and the material receiving box and is elastically connected with the material receiving box, the material receiving box is provided with a through hole, the moving contact push rod penetrates through the through hole and is slidably connected with the material receiving box, and the moving contact push rod, the moving contact push rod is used for pushing the moving contact to move towards the incoming line static contact and the outgoing line static contact, the inner surface of the shell is provided with a high-temperature-resistant anti-adhesion coating, and the high-temperature-resistant anti-adhesion coating is used for blocking metal splashes generated by electric arcs from contacting with the inner surface of the shell.

In one embodiment, the thickness of the high temperature resistant anti-adhesion coating is between 0.5 mm and 2 mm.

In one embodiment, the bottom surface of the material receiving box is provided with a plurality of strip-shaped grooves.

In one embodiment, the arc extinguish chamber further comprises a flange, and the flange is adjacent to the notch of the accommodating groove and is respectively abutted against the shell and the material receiving box.

According to the arc extinguish chamber, the high-temperature-resistant anti-adhesion coating is arranged on the inner surface of the shell of the arc extinguish chamber, so that metal splashes generated by electric arcs are not easily adhered to the inner wall of the shell in the working process of the relay, the influence of the metal splashes on the insulation resistance of the arc extinguish chamber is reduced, and the reliability of the relay is improved; moreover, the metal splash and the inner surface of the shell are separated by the high-temperature-resistant anti-adhesion coating, and the burning of the metal splash to the inner surface of the shell is reduced, so that the service life of the relay is prolonged, and the safe use of the relay is ensured; in addition, carry out whole protection to metal casing through high temperature resistant anti-adhesion coating, simple structure in the arc extinguishing chamber, the manufacturing cost of relay is lower to the market competition of product has been improved.

Drawings

FIG. 1 is a schematic cross-sectional view of an exemplary arc chute;

fig. 2 is an exploded view of an arc chute according to an embodiment.

Detailed Description

In order to make the above objects, features and advantages of the present invention more comprehensible, embodiments of the present invention are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

Referring to fig. 1 and 2 together, the present invention provides an arc extinguish chamber 10, the arc extinguish chamber 10 includes a housing 100, an incoming line static contact 200, an outgoing line static contact 300, a material receiving box 400, a moving contact 500 and a moving contact push rod 600, the housing 100 is provided with a receiving groove 110, the housing 100 is provided with an incoming line 120 and an outgoing line 130 on a side facing away from the notch of the receiving groove 110, the incoming line 120 and the outgoing line 130 are respectively communicated with the receiving groove 110, the incoming line static contact 200 is inserted into the incoming line 120 and abuts against the edge of the incoming line 120, the outgoing line static contact 300 is inserted into the outgoing line 130 and abuts against the edge of the outgoing line 130, the material receiving box 400 is located in the notch of the receiving groove 110 and connected with the housing 100, the moving contact 500 is disposed between the incoming line static contact 200 and the material receiving box 400 and elastically connected with the material receiving box 400, the material receiving box 400 is provided with a through hole 410, and the moving contact push rod 600 is connected with the moving contact 500, the moving contact push rod 600 is used for pushing the moving contact 500 to move towards the incoming line static contact 200 and the outgoing line static contact 300, the inner surface of the shell 100 is provided with a high temperature resistant anti-adhesion coating 700, and the high temperature resistant anti-adhesion coating 700 is used for blocking the contact of metal splashes generated by electric arc and the inner surface of the shell 100.

According to the arc extinguish chamber 10, the high-temperature-resistant anti-adhesion coating 700 is arranged on the inner surface of the shell 100, so that metal splashes generated by electric arcs are not easily adhered to the inner wall of the shell 100 in the working process of the relay, the influence of the metal splashes on the insulation resistance of the arc extinguish chamber 10 is reduced, and the reliability of the relay is improved; moreover, the high-temperature resistant anti-adhesion coating 700 separates the metal splash from the inner surface of the shell 100, and reduces the burning of the metal splash to the inner surface of the shell 100, thereby prolonging the service life of the relay and ensuring the safe use of the relay; in addition, the metal shell 100 is integrally protected by the high-temperature resistant anti-adhesion coating 700, the structure in the arc extinguish chamber 10 is simple, and the production cost of the relay is low, so that the market competitiveness of the product is improved.

The working principle of the arc extinguish chamber is as follows: when the relay is attracted, the incoming line static contact 200 is electrically connected with an external power supply, the outgoing line static contact 300 is electrically connected with a load circuit, and the two ends of the moving contact 500 are respectively abutted against the incoming line static contact 200 and the outgoing line static contact 300 under the pushing of the moving contact push rod 600 by the moving contact 500. When the relay is released, the moving contact push rod 600 pulls the moving contact 500 to reset, that is, the moving contact 500 gradually leaves the incoming line static contact 200 and the outgoing line static contact 300, in the process, a small air gap is generated between the moving contact 500 and the incoming line static contact 200 and between the moving contact 500 and the outgoing line static contact 300, so that the voltages loaded on the incoming line static contact 200 and the outgoing line static contact 300 form a strong electric field at the air gap, and further an electric arc is generated, the electric arc burns in the accommodating groove 110 to release heat, and metal on the surfaces of the incoming line static contact 200, the outgoing line static contact 300 and the moving contact 500 is instantly melted and splashed to the periphery. After the metal splash splashes on the surface of the high-temperature-resistant anti-adhesion coating 700, the metal splash slides off the surface of the high-temperature-resistant anti-adhesion coating 700 and finally falls into the material receiving box 400, and the metal splash is not easily adhered to the inner surface of the shell 100, so that the insulation resistance between the incoming static contact 200 and the outgoing static contact 300 is kept at a high value, and the stability of the performance of the relay is ensured.

The housing 100 is used for accommodating the moving contact 500 and supporting the incoming line static contact 200, the outgoing line static contact 300 and the moving contact push rod 600, so as to realize the installation of the incoming line static contact 200, the outgoing line static contact 300, the moving contact 500 and the moving contact push rod 600. The utility model discloses in, material receiving box 400 sets up in the notch of storage tank 110 and is connected with casing 100, and like this, the electric arc phenomenon that inlet wire static contact 200 and outlet wire static contact 300 produced takes place in storage tank 110 and finally in storage tank 110 interior dead amount to electric arc has reduced the influence of electric arc to the outer electric elements of relay. That is, the case 100 isolates the arc from the external environment, thereby improving safety in use of the relay.

The incoming line static contact 200 is used for electrically connecting with an external power supply, the outgoing line static contact 300 is used for electrically connecting with an external load circuit, or the incoming line static contact 200 and the outgoing line static contact 300 can be respectively used as leads of two poles of a relay, and the two are jointly used for respectively communicating the relay with the external power supply and the load circuit, so that the relay is convenient to switch on or switch off the circuit.

The material receiving box 400 is used for sealing the notch of the accommodating groove 110 so as to improve the sealing performance of the arc extinguish chamber, and in addition, the material receiving box 400 is also used for receiving metal splashes generated in the working process of the relay. In one embodiment, the material receiving box 400 has a plurality of grooves 420 formed on a bottom surface thereof facing the receiving cavity 110. Through seting up bar groove 420 on material receiving box 400, when the metal splash falls on material receiving box 400, partial metal splash will fall into bar groove 420 in to restrict in bar groove 420 all the time under the restraint of bar groove 420 internal surface, so, reduced the gliding metal volume of splashing of material receiving box 400, and then promoted the inside stability of relay.

The movable contact 500 is driven by the movable contact push rod 600 to move towards the incoming line fixed contact 200 and the outgoing line fixed contact 300, so as to connect the incoming line fixed contact 200 and the outgoing line fixed contact 300, that is, to conduct the power current to the load circuit, so as to drive the load circuit to operate.

In one embodiment, the high temperature resistant anti-adhesion coating 700 is a layer formed by applying a high temperature resistant anti-adhesion coating on the inner surface of the casing 100. Preferably, the high-temperature-resistant anti-adhesion coating comprises the following components in parts by weight: 35% of polytetrafluoroethylene resin, 15% of polyvinyl butyral, 10% of titanium dioxide, 6% of talcum powder, 6% of light calcium powder, 2% of lotus leaf auxiliary agent, 10% of ethyl acetate, 10% of n-butyl alcohol, 1% of dispersing agent, 2% of leveling auxiliary agent, 1% of sodium dodecyl benzene sulfonate and 2% of polyethylene glycol. Furthermore, the particle size of the high-temperature resistant anti-adhesion coating is less than 50 nanometers. The high-temperature-resistant anti-adhesion coating utilizes the characteristics of hydrophobic property of the lotus leaf auxiliary agent and small surface tension of the nanometer-grade material, and impurities are not easy to adhere to the surface of the high-temperature-resistant anti-adhesion coating 700, so that the cleanliness of the inner surface of the shell 100 is improved. In addition, the melting points of the titanium dioxide, the light calcium carbonate powder and the talcum powder are higher, and the titanium dioxide, the light calcium carbonate powder and the talcum powder are added into the coating, so that the high-temperature resistance of the coating is favorably improved. Therefore, when the metal splash is splashed on the surface of the high-temperature-resistant anti-adhesion coating 700, the high-temperature-resistant anti-adhesion coating is not easy to melt and deform under the heat radiation of the metal splash, and the stability of the high-temperature-resistant anti-adhesion coating 700 is strong. Meanwhile, the high temperature resistant anti-adhesion coating 700 separates the metal spatters from the inner surface of the case 100, thereby reducing the heat radiation of the metal spatters to the inner surface of the case 100 to ensure the stability of the case 100 and to extend the life span of the case 100.

In one embodiment, the high temperature resistant anti-adhesion coating 700 is formed by brushing a high temperature resistant anti-adhesion paint on the inner surface of the casing 100. It can also be understood that the high temperature resistant anti-adhesion coating is dipped by the brush and is uniformly coated on the inner surface of the casing 100 to form the high temperature resistant anti-adhesion coating 700 with uniform thickness, so that the thickness of the high temperature resistant anti-adhesion coating 700 at various positions on the inner surface of the casing 100 is uniform, that is, the difference value of the heat radiation transmitted to the inner surface of the casing 100 through different positions of the high temperature resistant anti-adhesion coating 700 is small, thus, the difference value of the temperature at various positions on the inner surface of the casing 100 is small, the casing 100 is not easy to crack and break, and the service life of the casing 100 is prolonged. In another embodiment, the high temperature resistant anti-adhesion coating 700 is formed by spraying a high temperature resistant anti-adhesion coating on the inner surface of the casing 100. It can also be understood that, high temperature resistant anti-adhesion coating is filled in the spray gun, and the high temperature resistant anti-adhesion coating is sprayed on the inner surface of the casing 100 through the spray gun, so that when the high temperature resistant anti-adhesion coating is sprayed out from the spray gun, the spraying surface of the high temperature resistant anti-adhesion coating is larger, which is beneficial to eliminating the spraying dead angle in the casing 100 and improving the uniformity of the high temperature resistant anti-adhesion coating 700, and in addition, the coating efficiency of the high temperature resistant anti-adhesion coating can be improved by adopting a spraying mode, and further the production efficiency of the relay is improved.

In one embodiment, the thickness of the high temperature resistant anti-adhesion coating 700 is between 0.5 mm and 2 mm. Like this, guaranteeing that high temperature resistant anti-adhesion coating 700 has higher heat-proof quality to when reducing the heat radiation of metal splash to the casing 100 internal surface, can reducing high temperature resistant anti-adhesion coating 700 to the volumetric influence of storage tank 110, that is to say, reduce high temperature resistant anti-adhesion coating 700 to the influence of inlet wire static contact 200, the static contact 300 of being qualified for the next round of competitions and moving contact 500, in order to guarantee the effective action of relay.

Referring to fig. 1 again, in an embodiment, the arc extinguish chamber further includes a flange 800, and the flange 800 is adjacent to the notch of the receiving groove 110 and is abutted against the housing 100 and the material receiving box 400, respectively. That is to say, the material receiving box 400 is indirectly connected with the housing 100 through the flange plate 800, and it can also be understood that the secondary connection between the material receiving box 400 and the housing 100 is realized by providing the flange plate 800, so that the stability of the connection between the material receiving box 400 and the housing 100 is improved, and the effective use of the relay is ensured. In addition, through setting up ring flange 800, can realize that the installation of relay on external parts is fixed, prevent that the relay from receiving external force to strike down, relay internal line disconnection to further improve the stability of relay.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims

1. An arc extinguish chamber comprises a shell, an incoming line static contact, an outgoing line static contact, a material receiving box, a moving contact and a moving contact push rod, wherein the shell is provided with a containing groove, one surface of the shell, which is back to a notch of the containing groove, is respectively provided with a wire inlet and a wire outlet, the wire inlet and the wire outlet are respectively communicated with the containing groove, the incoming line static contact penetrates through the wire inlet and is abutted against the edge of the wire inlet, the outgoing line static contact penetrates through the wire outlet and is abutted against the edge of the wire outlet, the material receiving box is positioned at the notch of the containing groove and is connected with the shell, the moving contact is arranged between the incoming line static contact and the material receiving box and is elastically connected with the material receiving box, the material receiving box is provided with a through hole, the moving contact push rod penetrates through the through hole and is slidably connected with the material receiving box, and the moving contact, the moving contact push rod is used for pushing the moving contact to move towards the incoming line static contact and the outgoing line static contact, and the moving contact push rod is characterized in that a high-temperature-resistant anti-adhesion coating is arranged on the inner surface of the shell and used for blocking metal splashes generated by electric arcs from contacting with the inner surface of the shell.

2. Arc chute according to claim 1, characterized in that the thickness of the high temperature resistant anti-adhesion coating is comprised between 0.5 and 2 mm.

3. The arc extinguish chamber according to claim 1, wherein the bottom surface of the material receiving box is provided with a plurality of strip-shaped grooves.

4. The arc chute according to claim 1, further comprising a flange adjacent to the notch of the receiving groove and abutting against the housing and the material receiving box, respectively.