CN112466708A

CN112466708A - High-voltage contactor

Info

Publication number: CN112466708A
Application number: CN202011536230.1A
Authority: CN
Inventors: 于霞
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-12-23
Filing date: 2020-12-23
Publication date: 2021-03-09

Abstract

The invention relates to the technical field of electrical equipment, and particularly discloses a high-voltage contactor, which comprises a lower frame seat, an upper sealing cover, a floating seat and an electromagnet assembly, wherein the lower end of the lower frame seat is provided with a seat body, the middle of the seat body is provided with a middle mounting cavity, and the bottom of the seat body is downwards provided with an electromagnet assembly mounting groove; a middle insulating column is arranged in the middle of the floating seat, and an iron core I is fixedly arranged at the bottom of the upper fixing plate; an installation flange seat is arranged at the bottom of the electromagnet assembly, an iron core II is fixedly connected to the upper end of the installation flange seat through a bolt, and a coil is annularly sleeved in the middle of the iron core II; the energy consumption is low in the using process, the heat dissipation plate arranged at the bottom can dissipate heat well, and the phenomenon of overburning of the whole contactor is avoided; and through the produced vibrations of buffering ring I and buffering ring II buffering aerostatics seat and electromagnet assembly contact time, improve the stability of whole contactor.

Description

High-voltage contactor

Technical Field

The invention relates to the technical field of electrical equipment, in particular to a high-voltage contactor.

Background

In a high-voltage power system, for better controlling the on/off of a circuit, a high-voltage contactor is generally used for controlling the on/off of the circuit, for example, patent numbers are as follows: 2020101885370 discloses a high voltage dc contactor comprising: the device comprises a shell, two static contacts, a moving contact, an armature, a yoke, a reset coil, a spring, a magnetic driving rod, an arc extinguish chamber and a magnetic driving mechanism, wherein the two static contacts, the moving contact, the armature, the yoke, the reset coil, the spring, the magnetic driving rod, the arc extinguish chamber and the magnetic driving mechanism are arranged in; the arc extinguish chamber is positioned above the inner cavity of the shell, and the magnetic driving mechanism is positioned at the bottom of the inner cavity of the shell; the two static contacts are symmetrically arranged on two sides of the inner cavity of the arc extinguish chamber; the magnetic driving rod is vertically arranged at the center line position of the shell; one end of the magnetic driving rod extending into the arc extinguish chamber is connected with the magnetic moving contact, and the other end of the magnetic driving rod penetrates through the yoke and is connected with the magnetic driving mechanism through the armature; the reset coil is arranged between the yoke iron and the armature iron and positioned at two sides of the magnetic driving mechanism; the spring is wound on the magnetic driving rod; therefore, the ablation of the electric arc to the contactor contact is reduced, and the service life of the high-voltage direct-current contactor is prolonged;

however, the high-voltage contactor in the prior art still has the following disadvantages in the practical use process:

1. the high-voltage contactor in the prior art is generally used in a large power supply line, generally, the whole structure is large, the power consumption is large, the generated heat energy is large, the heat dissipation performance is poor, the whole contactor is overheated due to long-time heating, and even the high-voltage contactor is burnt out;

2. the high-voltage contactor in the prior art has poor guidance quality, and when vibration or other large fluctuation conditions exist around the high-voltage contactor, the whole shock resistance is poor, and poor contact is easily caused under a large swing amplitude.

Therefore, a high-voltage contactor with low energy consumption, good heat dissipation performance and strong shock resistance is urgently needed to solve the problems.

Disclosure of Invention

Aiming at the problems, the invention provides a high-voltage contactor, which enables the interior of the whole contactor to be in a relatively vacuum state by vacuumizing a middle installation cavity, plays a role in reducing energy consumption by vacuum arc extinguishing, can well dissipate heat through a heat dissipation plate arranged at the bottom and avoids the phenomenon of overburning of the whole contactor; through the produced vibrations of buffering ring I and buffering ring II buffering aerostatic seat when contacting with electromagnet assembly, improve the stability of whole contactor.

In order to achieve the purpose, the invention provides the following technical scheme: a high-voltage contactor comprises a lower frame seat, an upper sealing cover arranged at the top of the lower frame seat, a floating seat arranged in the middle of the lower frame seat and an electromagnet assembly arranged at the bottom of the lower frame seat, wherein a seat body is arranged at the lower end of the lower frame seat, a flange I is annularly arranged outwards at the top of the seat body, a middle mounting cavity is arranged in the middle of the seat body, guide grooves are symmetrically formed in the left side and the right side of the inner wall of the middle mounting cavity, and an electromagnet assembly mounting groove is formed downwards at the bottom of the seat body;

a middle insulating column is arranged in the middle of the floating seat, an upper fixing plate is fixedly connected to the top of the middle insulating column, and an iron core I is fixedly arranged at the bottom of the upper fixing plate;

an installation flange seat buckled with the installation groove of the electromagnet assembly is arranged at the bottom of the electromagnet assembly, an iron core II is fixedly connected to the upper end of the installation flange seat through a bolt, and a coil is annularly sleeved in the middle of the iron core II;

the iron core I is characterized in that reset spring assemblies are symmetrically arranged on the left side and the right side of the upper end of the iron core I, fixed mounting seats of an F-shaped groove structure are symmetrically arranged on the left side and the right side of the lower end of the upper fixing plate, wires are inserted into a groove body in the bottom of each fixed mounting seat, a movable contact plate assembly is fixedly connected to the lower end of each fixed mounting seat, and fixed contact plate assemblies are symmetrically and fixedly embedded in wall bodies of an installation cavity in the outer side of the lower end of each movable contact plate.

Preferably, the middle of the upper sealing cover is provided with a cover plate with a plate-shaped structure, the lower end of the cover plate is annularly provided with a flange II, the flange II and the flange I are fixedly connected through a connecting bolt, and the middle of the cover plate is outwards fixedly communicated with an air valve.

Preferably, be equipped with the bilateral symmetry in the cell body of guide way and seted up the spring block fixed slot downwards, the centre of reset spring subassembly is equipped with the spring, the lower extreme of spring links to each other with iron core I's upper end fixed phase, the upper end fixedly connected with spring fixation plate of spring, spring fixation plate and spring block fixed slot looks lock, and the tank bottom of spring fixation plate and spring block fixed slot passes through set screw II and fixed linking to each other.

Preferably, the upper end of the movable contact plate component is provided with a reset spring plate, the inner side of the reset spring plate is fixedly connected with the lower end of the fixed mounting seat through a fixing screw I, and the outer side of the lower end of the reset spring plate is fixedly provided with a movable contact.

Preferably, the outer side of the upper end of the wiring board is fixedly provided with the wiring board, and the upper end of the inner side surface of the wiring board is fixedly provided with a fixed contact corresponding to the position of the movable contact.

Preferably, the upper end hoop of flange I is inlayed and is furnished with the sealing washer, iron core I's lower extreme hoop is inlayed and is furnished with buffering ring I, iron core II's upper end hoop is inlayed and is furnished with buffering ring II.

Preferably, the bottom of the mounting flange seat is provided with a heat dissipation groove, and the bottom of the heat dissipation groove is fixedly provided with a heat dissipation plate.

Preferably, the left side and the right side of the iron core I are symmetrically provided with sliding blocks, and the sliding blocks are matched with the guide grooves in a sliding mode.

Compared with the prior art, the invention has the beneficial effects that: the invention has reasonable structure and strong functionality, and has the following advantages:

1. according to the invention, the overall structure is simple, the internal part of the whole contactor is in a relatively vacuum state by vacuumizing the middle installation cavity, so that the energy consumption of the whole contactor is low, the heat can be well dissipated through the heat dissipation plate arranged at the bottom, and the phenomenon of overburning of the whole contactor is avoided;

2. according to the invention, the guide groove is matched with the sliding block, so that the guide stability of the whole floating seat is improved, and the vibration generated when the floating seat is contacted with the electromagnet assembly is buffered through the buffer rings I and II, so that the stability of the whole contactor is improved.

Drawings

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

FIG. 2 is an isometric view II of the overall structure of the present invention;

FIG. 3 is a front view of the overall structure of the present invention;

FIG. 4 is an isometric view of the cross-sectional structure taken at A-A in FIG. 3;

fig. 5 is an enlarged view of a portion of the structure at B in fig. 4.

In the figure: 1. a lower frame seat; 2. an upper sealing cover; 3. a floating seat; 4. an electromagnet assembly; 5. a return spring assembly; 6. a fixed touch pad assembly; 7. a movable contact plate component; 8. a seal ring; 9. a connecting bolt; 101. a base body; 102. a flange I; 103. a middle mounting cavity; 104. a guide groove; 105. a spring block fixing groove; 106. an electromagnet assembly mounting groove; 201. a cover plate; 202. a flange II; 203. an air valve; 301. an upper fixing plate; 302. a middle insulating column; 303. an iron core I; 304. fixing the mounting seat; 305. a wire; 306. a fixing screw I; 307. a buffer ring I; 308. a slider; 401. installing a flange seat; 402. a heat sink; 403. a heat dissipation plate; 404. an iron core II; 405. a coil; 406. a buffer ring II; 501. a spring; 502. a spring fixing plate; 503. a fixing screw II; 601. a wiring board; 602. a fixed contact; 701. a return spring plate; 702. moving contact.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In an embodiment, referring to fig. 1 to 5, the present invention provides a technical solution: a high-voltage contactor comprises a lower frame seat 1, an upper sealing cover 2 arranged at the top of the lower frame seat 1, a floating seat 3 arranged in the middle of the lower frame seat 1 and an electromagnet assembly 4 arranged at the bottom of the lower frame seat 1, wherein a seat body 101 is arranged at the lower end of the lower frame seat 1, a flange I102 is arranged at the top of the seat body 101 in an outward annular mode, a middle installation cavity 103 is arranged in the middle of the seat body 101, guide grooves 104 are symmetrically arranged on the left side and the right side of the inner wall of the middle installation cavity 103, an electromagnet assembly installation groove 106 is downwards arranged at the bottom of the seat body 101, and the lower frame seat 1 is mainly used for providing fixed support and protection for the floating seat 3;

a middle insulating column 302 is arranged in the middle of the floating seat 3, an upper fixing plate 301 is fixedly connected to the top of the middle insulating column 302, and an iron core I303 is fixedly arranged at the bottom of the upper fixing plate 301;

an installation flange seat 401 buckled with the electromagnet assembly installation groove 106 is arranged at the bottom of the electromagnet assembly 4, an iron core II 404 is fixedly connected to the upper end of the installation flange seat 401 through a bolt, and a coil 405 is annularly sleeved in the middle of the iron core II 404;

reset spring assemblies 5 are symmetrically arranged on the left side and the right side of the upper end of the iron core I303, fixed mounting seats 304 of an F-shaped groove structure are symmetrically arranged on the left side and the right side of the lower end of the upper fixing plate 301, a lead 305 is inserted into a groove body at the bottom of each fixed mounting seat 304, a movable contact plate assembly 7 is fixedly connected to the lower end of each fixed mounting seat 304, and fixed contact plate assemblies 6 are symmetrically and fixedly embedded in the wall body of the middle mounting cavity 103 outside the lower end of each movable contact plate assembly 7;

when the coil 405 is powered on, the whole iron core II 404 generates magnetic attraction, so that the iron core I303 is attracted downwards with the iron core II 404, the movable contact plate assemblies 7 on two sides of the upper fixed plate 301 are driven to downwards contact with the fixed contact plate assembly 6, the power on is completed, when the coil 405 is powered off, the magnetic attraction of the iron core II 404 and the iron core I303 disappears, the floating seat 3 is upwards pulled back to the original position under the reset elastic force action of the reset spring assembly 5, and the power off is completed.

In another embodiment of this embodiment, a cover plate 201 of a plate-like structure is disposed in the middle of the upper sealing cover 2, a flange II 202 is disposed at the lower end of the cover plate 201 in the circumferential direction, the flange II 202 and the flange I102 are fixedly connected by a connecting bolt 9, an air valve 203 is fixedly and outwardly communicated in the middle of the cover plate 201, the upper sealing cover 2 and the electromagnet assembly 4 are respectively fixed at the upper and lower ends of the lower frame base 1, a closed cavity is formed in the middle mounting cavity 103 in the middle of the lower frame base 1, the air valve 203 is connected with a vacuum pump through an air pipe, and the middle mounting cavity 103 is evacuated, so that when the fixed contact plate assembly 6 in the middle mounting cavity 103 contacts the movable contact plate assembly 7, a strong arc is prevented from being generated, a good arc extinguishing effect is achieved, and the service lives of the fixed contact plate assembly 6 and the movable contact.

In another embodiment of this embodiment, a spring block fixing groove 105 is symmetrically arranged in the groove body of the guide groove 104 and has been opened downwards, a spring 501 is arranged in the middle of the return spring assembly 5, the lower end of the spring 501 is fixedly connected with the upper end of the iron core I303, the upper end of the spring 501 is fixedly connected with a spring fixing plate 502, the spring fixing plate 502 is fastened with the spring block fixing groove 105, and the groove bottom of the spring fixing plate 502 and the groove bottom of the spring block fixing groove 105 are fixedly connected through a fixing screw II 503, where the spring 501 has an elastic restoring capability with respect to the floating seat 3, when the floating seat 3 slides downwards under the magnetic attraction effect of the electromagnet assembly 4, the spring 501 is compressed, elastic potential energy is stored in the spring 501, when the magnetic force between the floating seat 3 and the electromagnet assembly 4 disappears, the potential energy in the spring 501 is released, and the spring 501 drives the floating seat.

In another embodiment of this embodiment, a reset spring plate 701 is disposed at the upper end of the movable contact plate assembly 7, the inner side of the reset spring plate 701 is fixedly connected to the lower end of the fixed mounting base 304 through a fixing screw I306, a movable contact 702 is fixedly disposed at the outer side of the lower end of the reset spring plate 701, and when the movable contact plate assemblies 7 on the left and right sides of the lower end of the floating seat 3 are respectively contacted with the fixed contact plate assembly 6, the whole contactor is in a connected state.

In another embodiment of this embodiment, a wiring board 601 is fixedly disposed on an outer side of an upper end of the wiring board 601, a fixed contact 602 corresponding to the position of the movable contact 702 is fixedly disposed on an upper end of an inner side of the wiring board 601, the wiring board 601 can be connected to an external guide, and when the movable contact 702 contacts the fixed contact 602, a wire connected to the wiring board 601 is in a connected state.

In another embodiment of this embodiment, the upper end of the flange I102 is annularly embedded with a sealing ring 8, here, the sealing ring 8 has a good sealing effect with respect to the lower bezel 1 and the upper cover 2, the lower end of the core I303 is annularly embedded with a buffer ring I307, the upper end of the core II 404 is annularly embedded with a buffer ring II 406, when the lower end of the core I303 is attracted to the upper end of the core II 404, the buffer ring I307 and the buffer ring II 406 play a role in buffering between the floating seat 3 and the electromagnet assembly 4, thereby effectively avoiding the large impact generated when the floating seat 3 is attracted to the electromagnet assembly 4, and therefore improving the stability of the entire contactor, and simultaneously prolonging the service life of the contact surface between the floating seat 3 and the electromagnet assembly 4.

In another embodiment of this embodiment, the bottom of the mounting flange seat 401 is provided with a heat dissipation groove 402, and the bottom of the heat dissipation groove 402 is fixedly provided with a heat dissipation plate 403, where the heat dissipation plate 403 plays a good role in heat dissipation relative to the bottom of the electromagnet assembly 4, so as to avoid overheating caused by long coil energization time.

In another embodiment of this embodiment, the left and right sides of the iron core I303 are symmetrically provided with the sliding blocks 308, and the sliding blocks 308 are in sliding fit with the guide grooves 104, so that the structure ensures the stability of the floating seat 3 when sliding up and down in the middle of the lower frame base 1, and further improves the accuracy of contact between the fixed contact plate assembly 6 and the movable contact plate assembly 7, and improves the stability of power-on.

The working principle is as follows: before working, the air valve 203 is communicated with an external vacuum pump through an air pipe, the middle installation cavity 103 is vacuumized, the inside of the whole contactor is in a relative vacuum state, a vacuum arc extinguishing effect is achieved, the wiring end of the coil 405 can be communicated with an external power supply, when the coil 405 is communicated, magnetic attraction is generated at the iron core II 404 due to the electromagnetic induction effect, the iron core I303 is downwards attracted with the iron core II 404, in the process, the movable contact plate assemblies 7 at the left side and the right side of the lower end of the upper fixing plate 301 move downwards together, the movable contact 702 at the outer end of the reset spring plate 701 is contacted and matched with the fixed contact 602, the wiring plate 601 is further communicated with the lead 305 through the reset spring plate 701, the whole contactor is in a power-on working state, after the coil 405 is powered on, the magnetic attraction of the iron core II 404 relative to the iron core I303 disappears, the floating seat 3 rebounds upwards to, and further, the iron core I303 is separated from the iron core II 404, and simultaneously, the moving contact 702 is driven to be separated from the fixed contact 602, and at this time, the whole contactor is in a power-off working state.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A high voltage contactor, comprising: the device comprises a lower frame seat (1), an upper sealing cover (2), a floating seat (3), an electromagnet assembly (4), a reset spring assembly (5), a fixed contact plate assembly (6) and a movable contact plate assembly (7); an upper sealing cover (2) is arranged at the top of the lower frame base (1), a floating base (3) is arranged in the middle of the lower frame base (1), and an electromagnet assembly (4) is arranged at the bottom of the lower frame base (1);

the lower frame base (1) comprises: the device comprises a base body (101), a flange I (102), a middle mounting cavity (103), a guide groove (104) and an electromagnet assembly mounting groove (106); a base body (101) is arranged at the lower end of the lower frame base (1), a flange I (102) is arranged at the top of the base body (101) in an outward annular mode, a middle mounting cavity (103) is arranged in the middle of the base body (101), guide grooves (104) are symmetrically formed in the left side and the right side of the inner wall of the middle mounting cavity (103), and an electromagnet assembly mounting groove (106) is formed in the bottom of the base body (101) downwards;

the floating seat (3) comprises: the device comprises a fixing plate (301), a middle insulating column (302), an iron core I (303), a fixing mounting seat (304) and a lead (305); a middle insulating column (302) is arranged in the middle of the floating seat (3), an upper fixing plate (301) is fixedly connected to the top of the middle insulating column (302), and an iron core I (303) is fixedly arranged at the bottom of the upper fixing plate (301);

the electromagnet assembly (4) comprises: the magnetic core comprises a mounting flange seat (401), an iron core II (404) and a coil (405); an installation flange seat (401) buckled with the electromagnet assembly installation groove (106) is arranged at the bottom of the electromagnet assembly (4), an iron core II (404) is fixedly connected to the upper end of the installation flange seat (401) through a bolt, and a coil (405) is sleeved in the middle of the iron core II (404) in the circumferential direction;

the iron core I (303) is characterized in that reset spring assemblies (5) are symmetrically arranged on the left side and the right side of the upper end of the iron core I (303), fixed mounting seats (304) of an F-shaped groove structure are symmetrically arranged on the left side and the right side of the lower end of the upper fixing plate (301), a lead (305) is inserted into a groove body in the bottom of each fixed mounting seat (304), a movable contact plate assembly (7) is fixedly connected to the lower end of each fixed mounting seat (304), and fixed contact plate assemblies (6) are fixedly and symmetrically embedded into the wall body of the middle mounting cavity (103) outside the lower end of each movable contact plate assembly.

2. A high voltage contactor according to claim 1, wherein: the middle of the upper sealing cover (2) is provided with a cover plate (201) with a plate-shaped structure, a flange II (202) is arranged at the lower end of the cover plate (201) in the circumferential direction, the flange II (202) and the flange II (102) are fixedly connected through a connecting bolt (9), and an air valve (203) is fixedly communicated with the middle of the cover plate (201) outwards.

3. A high voltage contactor according to claim 1, wherein: be equipped with bilateral symmetry in the cell body of guide way (104) and seted up spring block fixed slot (105) downwards, the centre of reset spring subassembly (5) is equipped with spring (501), the lower extreme of spring (501) links to each other with the upper end of iron core I (303) is fixed, the upper end fixedly connected with spring fixation plate (502) of spring (501), spring fixation plate (502) and spring block fixed slot (105) are buckled mutually, and spring fixation plate (502) and the tank bottom of spring block fixed slot (105) pass through set screw II (503) and fixed linking to each other.

4. A high-voltage contactor according to any one of claims 1-3, characterized in that: the upper end of the movable contact plate component (7) is provided with a reset spring plate (701), the inner side of the reset spring plate (701) is fixedly connected with the lower end of the fixed mounting seat (304) through a fixing screw I (306), and the outer side of the lower end of the reset spring plate (701) is fixedly provided with a movable contact (702).

5. A high-voltage contactor according to claim 4, characterized in that: the outer side of the upper end of the wiring board (601) is fixedly provided with the wiring board (601), and the upper end of the inner side surface of the wiring board (601) is fixedly provided with a fixed contact (602) corresponding to the position of the moving contact (702).

6. A high voltage contactor according to claim 1, wherein: the upper end of the flange I (102) is annularly embedded with a sealing ring (8), the lower end of the iron core I (303) is annularly embedded with a buffer ring I (307), and the upper end of the iron core II (404) is annularly embedded with a buffer ring II (406).

7. A high-voltage contactor according to claim 5 or 6, characterized in that: the bottom of the mounting flange seat (401) is provided with a heat dissipation groove (402), and the bottom of the heat dissipation groove (402) is fixedly provided with a heat dissipation plate (403).

8. A high voltage contactor according to claim 7, wherein: the left side and the right side of the iron core I (303) are symmetrically provided with sliding blocks (308), and the sliding blocks (308) are matched with the guide grooves (104) in a sliding mode.