CN212990992U

CN212990992U - High-voltage direct-current contactor with air pressure detection function

Info

Publication number: CN212990992U
Application number: CN202021936293.1U
Authority: CN
Inventors: 杜升书; 朱路
Original assignee: Zhejiang Bsb Electrical Appliances Co ltd
Current assignee: Zhejiang Bsb Electrical Appliances Co ltd
Priority date: 2020-09-07
Filing date: 2020-09-07
Publication date: 2021-04-16
Anticipated expiration: 2030-09-07

Abstract

The utility model provides a high-voltage direct-current contactor with air pressure detection, which comprises a shell, an electromagnetic system, a contact system and an arc extinguishing system, wherein a sealed cavity is formed in the shell, the electromagnetic system is arranged at the bottom of the sealed cavity, the contact system is arranged above the electromagnetic system, and the arc extinguishing system comprises an arc extinguishing chamber; electromagnetic system includes iron cup, coil skeleton, enameled wire, and the coil skeleton sets up in the iron cup, and the enameled wire cover is located on the coil skeleton, be formed with the connecting portion of upwards extending on the coil skeleton, the explosion chamber is enclosed by the insulating part, and the insulating part top is fixed in sealed chamber top, and the below of insulating part supports electromagnetic system is last, and one side that the insulating part is close to connecting portion is formed with dodges the groove, dodge the inslot and be provided with a baroceptor, baroceptor pass through the wire and be connected with the control unit who sets up in the shell outside. Through set up the insulating part between explosion chamber and sealed chamber, neither can influence normal arc extinguishing function, also can carry out real-time detection to sealed intracavity atmospheric pressure.

Description

High-voltage direct-current contactor with air pressure detection function

Technical Field

The utility model belongs to the technical field of the contactor technique and specifically relates to a take atmospheric pressure detection type high voltage direct current contactor is related to.

Background

The high-voltage direct-current contactor is a switching element working in a power supply system, and when the power supply system needs to be connected or disconnected, the connection or disconnection of the contactor can be controlled by controlling a coil control end at the bottom of a voltage level, so that the purpose of connecting or disconnecting a high-voltage line is achieved. The contactor is composed of electromagnetic system (movable iron core, static iron core, electromagnetic coil), contact system and arc-extinguishing device. When the electromagnetic coil of the contactor is electrified, a strong magnetic field is generated, the static iron core generates electromagnetic attraction to attract the movable iron core and drive the contact to act: closing the contact; when the coil is powered off, the electromagnetic attraction disappears, the movable iron core is released under the action of the release spring, and the contact is restored: the contacts are opened.

The contact can generate electric arc in the on-off process, and the high temperature generated by the electric arc can lead the contact to be blackened, burnt and singed to generate metal particles, thereby directly influencing the service life of the current contactor. The general high-voltage direct-current contactor is generally used in the fields of novel energy automobiles, inverter power supplies and the like, the current can reach 400A or higher, the voltage is 500V-900V, and when the voltage is higher and higher, the problem of electric arc is more and more serious. Aiming at the problem, inert gas for arc extinction is generally filled in a sealing cavity of a contactor product so as to reduce the damage of high-voltage arcs of the product to internal components of the contactor when a static contact and a moving contact are disconnected. In practical application, inert gas in the sealing cavity is in a high-pressure state, slow leakage exists, the arc extinguishing effect of the contactor is poor, and the contactor can be rapidly aged due to loss of contact metal materials in the switching-on and switching-off process of a contact system.

Therefore, on the premise of not influencing the arc extinguishing function of the normal arc extinguishing chamber, one of the technical difficulties in the prior art is to detect the air pressure in the sealed cavity.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model aims at providing a take atmospheric pressure to detect type high voltage direct current contactor sets up the insulating part between explosion chamber and sealed chamber, neither can influence normal arc extinguishing function, also can carry out real-time detection to sealed intracavity atmospheric pressure.

Based on the above purpose, the utility model provides a take atmospheric pressure detection type high voltage direct current contactor, including shell, electromagnetic system, contact system and arc extinguishing system, be formed with the seal chamber in the shell, electromagnetic system sets up in seal chamber bottom, and the contact system sets up in electromagnetic system top, the arc extinguishing system includes the arc extinguishing chamber, and the static contact in the contact system is close to the one end of moving contact and the moving contact all sets up in the arc extinguishing chamber; the electromagnetic system comprises an iron cup, a coil framework and an enameled wire, wherein the iron cup is cup-shaped and is attached to the bottom and the inner wall of the sealed cavity, the coil framework is arranged in the iron cup, the enameled wire is sleeved on the coil framework, an upward extending connecting part is formed on the coil framework, two plug-in pieces which are respectively and electrically connected with an external circuit are adjacently arranged at the upper end of the connecting part, and two wiring ends of the enameled wire are respectively and spot-welded with the two plug-in pieces;

the arc extinguish chamber is surrounded by the insulating part, and the insulating part top is fixed in sealed chamber top, and the below of insulating part supports on the electromagnetic system, one side that the insulating part is close to connecting portion is formed with dodges the groove, dodge the inslot and be provided with a baroceptor, the baroceptor passes through the wire and is connected with the control unit who sets up in the shell outside.

Preferably, the insulating part is clamped in the shell, and the insulating part is not sealed at the clamping position of the shell.

Preferably, the connecting portion is disposed on a side of a connection line between the movable contact and the fixed contact.

Preferably, the air pressure sensor is fixed on one side of the connecting part far away from the iron cup.

Preferably, the insulating member is made of plastic.

Preferably, an inflation opening is arranged above one side of the sealing cavity, which is far away from the connecting part.

Preferably, the housing includes an upper cover and a housing, and the lead is connected to a control unit outside the housing after passing through the upper cover.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up the insulating part between explosion chamber and sealed chamber, this insulating part is the non-seal assembly simultaneously, is the non-seal between explosion chamber and the sealed chamber to both atmospheric pressure are the same, simultaneously, set up baroceptor outside the insulating part, so both can not influence normal arc extinguishing function, also can carry out real-time detection to sealed intracavity atmospheric pressure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.

FIG. 1 is a schematic view of the overall internal structure of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

fig. 3 is a schematic view of the structure of the insulating member.

1. An upper cover; 2. a wire; 3. a coil lead; 4. an insulating member; 5. an iron cup; 6. an air pressure sensor; 7. a control component; 8. static contact; 9. a moving contact; 10. sealing the cavity; 11. an arc extinguishing chamber; 12. an avoidance groove; 13. a connecting portion; 14. a plug-in sheet.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The embodiment provides a high-voltage direct-current contactor with air pressure detection, as shown in fig. 1, the high-voltage direct-current contactor comprises a shell, an electromagnetic system, a contact system and an arc extinguishing system, wherein a sealing cavity 10 is formed in the shell, the electromagnetic system is arranged at the bottom of the sealing cavity 10, the contact system is arranged above the electromagnetic system, the arc extinguishing system comprises an arc extinguishing chamber 11, and one end, close to a moving contact 9, of a static contact 8 and one end, close to the moving contact 9, of the contact system and the moving contact 9; the electromagnetic system comprises an iron cup 5, a coil framework and an enameled wire, wherein the iron cup 5 is cup-shaped and is attached to the bottom and the inner wall of the sealed cavity 10, the coil framework is arranged in the iron cup 5, the enameled wire is sleeved on the coil framework, a connecting part 13 extending upwards is formed on the coil framework, two plug-in pieces 14 electrically connected with an external circuit respectively are adjacently arranged at the upper end of the connecting part 13, and two wiring ends of the enameled wire are respectively in spot welding with the two plug-in pieces 14;

wherein, as shown in fig. 1 and fig. 1, explosion chamber 11 is enclosed by insulating part 4, and insulating part 4 top is fixed in sealed chamber 10 top, and the below of insulating part 4 is supported on the electromagnetic system, as shown in fig. 3, one side that insulating part 4 is close to connecting portion 13 is formed with dodges the groove 12, it is provided with a baroceptor 6 in the groove 12 to dodge, baroceptor 6 passes through wire 2 and is connected with the control unit 7 that sets up in the shell outside.

In a preferred embodiment, the insulating member 4 is clamped in the housing, and the insulating member 4 is not sealed at the clamping position of the housing. In this way, the gas in the sealed chamber 10 and the arc extinguishing chamber 11 can be communicated from the assembly of the insulator 4 and the housing, so that the sealed chamber 10 and the arc extinguishing chamber 11 have the same gas pressure.

In a preferred embodiment, the connecting portion 13 is disposed on a side where the movable contact 9 is connected to the stationary contact 8.

In a preferred embodiment, the air pressure sensor 6 is fixed to the side of the connecting portion 13 away from the iron cup 5.

In a preferred embodiment, the insulating member 4 is made of plastic.

In a preferred embodiment, an air charging opening is provided above a side of the sealed chamber 10 remote from the connecting portion 13.

In a preferred embodiment, the housing comprises an upper cover 1 and a shell, and the lead 2 penetrates through the upper cover 1 and is connected with a control component 7 outside the housing.

Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.

Claims

1. A high-voltage direct-current contactor with air pressure detection comprises a shell, an electromagnetic system, a contact system and an arc extinguishing system, wherein a sealing cavity (10) is formed in the shell, the electromagnetic system is arranged at the bottom of the sealing cavity (10), the contact system is arranged above the electromagnetic system, the arc extinguishing system comprises an arc extinguishing chamber (11), and one end, close to a movable contact (9), of a static contact (8) in the contact system and the movable contact (9) are both arranged in the arc extinguishing chamber (11); the electromagnetic system comprises an iron cup (5), a coil framework and an enameled wire, wherein the iron cup (5) is cup-shaped and is attached to the bottom and the inner wall of a sealed cavity (10), the coil framework is arranged in the iron cup (5), the enameled wire is sleeved on the coil framework, a connecting part (13) extending upwards is formed on the coil framework, two plug-in pieces (14) electrically connected with an external circuit are adjacently arranged at the upper end of the connecting part (13), and two wiring ends of the enameled wire are respectively in spot welding with the two plug-in pieces (14);

the electromagnetic switch is characterized in that the arc extinguish chamber (11) is surrounded by the insulating part (4), the top of the insulating part (4) is fixed at the top of the sealing cavity (10), the lower part of the insulating part (4) is supported on the electromagnetic system, one side of the insulating part (4) close to the connecting part (13) is formed with an avoiding groove (12), an air pressure sensor (6) is arranged in the avoiding groove (12), and the air pressure sensor (6) is connected with a control part (7) arranged outside the shell through a wire (2).

2. The high-voltage direct-current contactor with the air pressure detection function according to claim 1, wherein the insulator (4) is clamped in the housing, and the insulator (4) is not sealed at the clamping position of the housing.

3. The high-voltage direct-current contactor with the air pressure detection function according to claim 1, wherein the connecting portion (13) is arranged on one side of a connecting line between the movable contact (9) and the fixed contact (8).

4. High-voltage direct current contactor with air pressure detection according to claim 1, characterized in that the air pressure sensor (6) is fixed on the side of the connecting part (13) away from the iron cup (5).

5. High-voltage direct current contactor with gas pressure detection according to claim 1, characterized in that the insulator (4) is made of plastic.

6. High-voltage direct current contactor with air pressure detection according to claim 1, characterized in that an air charging opening is arranged above one side of the sealed cavity (10) far away from the connecting part (13).

7. The high-voltage direct-current contactor with the air pressure detection function according to claim 1, wherein the housing comprises an upper cover (1) and a shell, and the lead (2) penetrates through the upper cover (1) and is connected with a control component (7) outside the housing.