CN219873293U

CN219873293U - Vacuum contactor

Info

Publication number: CN219873293U
Application number: CN202320217386.6U
Authority: CN
Inventors: 任浩
Original assignee: Wuxi Haibang Mechanics And Electric Appliance Manufacturing Co ltd
Current assignee: Wuxi Haibang Mechanics And Electric Appliance Manufacturing Co ltd
Priority date: 2023-02-15
Filing date: 2023-02-15
Publication date: 2023-10-20
Anticipated expiration: 2033-02-15

Abstract

The utility model relates to the technical field of control switches and discloses a vacuum contactor which comprises a frame body; the vacuum switch tube comprises a tube body arranged on the frame body, a static contact piece fixed at one end of the tube body, and a movable contact piece which can slide along the axial direction of the tube body and is arranged at the other end of the tube body, wherein the movable contact piece can make opening and closing on-off reciprocating motion relative to the static contact piece; and the cooling assembly is arranged on one side of the vacuum switch tube and used for cooling the vacuum switch tube. The utility model can realize the real-time cooling of the vacuum switch tube, can effectively cool the temperature rise of the vacuum arc-extinguishing chamber, further can realize the local cooling of the vacuum switch tube, can effectively control the temperature rise of the vacuum contactor, improves the working stability and prolongs the service life.

Description

Vacuum contactor

Technical Field

The utility model relates to the technical field of control switches, in particular to a vacuum contactor.

Background

The vacuum contactor uses a vacuum arc-extinguishing chamber to extinguish arc, is used for frequently switching on and off normal working current, and is usually used for remotely switching on and off a 6kV and 380V (660V and 1140V) alternating current motor with medium and low voltage frequent start and stop.

In the related art, a vacuum contactor is generally composed of an insulating electricity isolating frame, a metal base, a transmission crank arm, an electromagnetic system, an auxiliary switch, a vacuum switch tube and other parts. When the electromagnetic coil of the electromagnetic system passes through the control voltage, the armature of the electromagnetic system drives the transmission crank arm to rotate, so that the moving contact in the vacuum switch tube is connected with the fixed contact, and after the electromagnetic coil is powered off, the moving contact is separated from the fixed contact due to the action of the separating spring, so that the moving contact is disconnected.

The vacuum contactor mainly has two functions of reliably extinguishing arc through normal working current and frequently cutting off working current, however, frequent on-off contact easily leads the working temperature of a vacuum switch tube of the vacuum contactor to be higher; specifically, for example, in some cases, the high frequency on-off of the moving contact and the fixed contact easily causes the local temperature of the vacuum switch tube to be too high, which affects the normal use and has poor working stability.

Disclosure of Invention

The utility model aims to provide a vacuum contactor which can realize real-time cooling of a vacuum switch tube, further realize local cooling of the vacuum switch tube and improve working stability.

To achieve the purpose, the utility model adopts the following technical scheme:

embodiments of the present utility model provide a vacuum contactor including:

a frame body;

the vacuum switch tube comprises a tube body arranged on the frame body, a static contact piece fixed at one end of the tube body, and a movable contact piece which can slide along the axial direction of the tube body and is arranged at the other end of the tube body, wherein the movable contact piece can make opening and closing on-off reciprocating motion relative to the static contact piece;

and the cooling assembly is arranged on one side of the vacuum switch tube and used for cooling the vacuum switch tube.

In some embodiments, the cooling assembly is disposed at an end of the stationary contact remote from the moving contact.

In some embodiments, the cooling assembly comprises:

the fixed disc is fixedly attached to the end face of one end, far away from the movable contact piece, of the static contact piece;

and the cooling pipe is fixed on the fixed disc.

In some embodiments, the fixing disc is provided with an annular groove, and at least part of the cooling pipe is fixed in the annular groove in a limiting manner.

In some embodiments, the fixed disk is in a shape of a cake, and the annular groove is arranged around the peripheral side wall of the fixed disk.

In some embodiments, the vacuum contactor further comprises:

the fixed disc is clamped between the fixed terminal line row and the fixed contact.

In some embodiments, the stationary terminal wire row is fastened and connected to one end of the stationary contact piece, which is far away from the movable contact piece, through holes are formed in the fixing plate, and the through holes are used for the screws to pass through.

In some embodiments, the through holes are multiple.

In some embodiments, there are a plurality of vacuum switch tubes, and one cooling assembly is fixed on one side of each vacuum switch tube.

In some embodiments, the vacuum contactor further comprises:

the armature assembly is arranged on the frame body;

the transmission crank arm is arranged on the frame body, one end of the transmission crank arm is in transmission connection with the movable contact piece, and the other end of the transmission crank arm is connected with the armature assembly;

the electromagnetic switch mechanism comprises an electromagnetic coil arranged on the frame body, and the electromagnetic coil is used for absorbing and driving the armature assembly after being electrified so as to drive the movable contact piece to make contact with the static contact piece for closing movement.

The utility model has the beneficial effects that:

compared with the vacuum contactor in the related art, the vacuum contactor of the utility model is additionally provided with the cooling component. The cooling assembly is arranged on one side of the vacuum switch tube and used for cooling the vacuum switch tube. The vacuum switch tube cooling device can realize real-time cooling of the vacuum switch tube, can effectively cool the temperature rise of the vacuum arc extinguishing chamber, can further realize local cooling of the vacuum switch tube, can effectively control the temperature rise of the vacuum contactor, improves the working stability and prolongs the service life.

Drawings

FIG. 1 is a schematic diagram of the connection of a vacuum contactor in an embodiment provided by the present utility model;

FIG. 2 is a side view of a vacuum contactor in an embodiment provided by the present utility model;

fig. 3 is a schematic front view of a cooling assembly of a vacuum contactor in an embodiment provided by the utility model.

In the figure:

1. a frame body; 2. a tube body; 3. a stationary contact; 4. a movable contact; 5. a cooling assembly; 51. a fixed plate; 511. an annular groove; 512. a through hole; 52. a cooling tube; 6. a static terminal line row; 7. a screw; 8. an armature assembly; 9. a transmission crank arm; 10. an electromagnetic switching mechanism.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1 to 3, an embodiment of the present utility model provides a vacuum contactor including a housing 1, a vacuum switching tube, and a cooling assembly 5. Wherein, the frame body 1 can be an insulating frame or a combination of the insulating frame body and a metal frame body; the vacuum switch tube comprises a tube body 2 arranged on the frame body 1, a static contact piece 3 fixed at one end of the tube body 2, and a movable contact piece 4 which can slide along the axial direction of the tube body 2 and is arranged at the other end of the tube body 2, wherein the movable contact piece 4 can make on-off reciprocating motion relative to the static contact piece 3, and is further used for on-off control; referring specifically to fig. 1-3, in some embodiments, the vacuum contactor further includes an armature assembly 8, a drive crank arm 9, and an electromagnetic switching mechanism 10. The armature assembly 8 is arranged on the frame body 1; the transmission crank arm 9 is arranged on the frame body 1, one end of the transmission crank arm 9 is in transmission connection with the movable contact piece 4, and the other end of the transmission crank arm 9 is connected with the armature assembly 8; the electromagnetic switch mechanism 10 comprises an electromagnetic coil arranged on the frame body 1, and the electromagnetic coil is used for absorbing and driving the armature assembly 8 after being electrified so as to drive the movable contact 4 to perform closing movement contacting the static contact 3. The cooling assembly 5 is provided at one side of the vacuum switching tube for cooling the vacuum switching tube.

Compared with the vacuum contactor in the related art, the vacuum contactor provided by the embodiment is additionally provided with the cooling assembly 5. The cooling assembly 5 is provided at one side of the vacuum switching tube for cooling the vacuum switching tube. The vacuum switch tube cooling device can realize real-time cooling of the vacuum switch tube, can effectively cool the temperature rise of the vacuum arc extinguishing chamber of the vacuum switch tube, further can realize partial cooling of the vacuum switch tube, can effectively control the temperature rise of the vacuum contactor, improves the working stability and prolongs the service life.

Further, through a great deal of experimental study, the applicant finds that the position of the vacuum switch tube which is required to be cooled is the end of the static contact piece 3 which is far away from the movable contact piece 4, the position of the end of the static contact piece 3 which is far away from the movable contact piece 4 is fixed, and in the high-frequency repeated on-off process of the end of the vacuum switch tube which is inserted into the vacuum switch tube and the movable contact piece 4, a great deal of heat is easily generated on the static contact piece 3, and part of heat is also easily led out from the static contact piece 3. Based on the above analysis, referring to fig. 1-3, in some embodiments, applicant locates the cooling assembly 5 at an end of the stationary contact 3 remote from the moving contact 4, thereby enabling rapid heat absorption for achieving elevated temperature cooling.

Further, referring to fig. 1 to 3, there may be a plurality of vacuum switching tubes, for example, three, four or more vacuum switching tubes, and one cooling assembly 5 is respectively fixed to one side of each vacuum switching tube, so that each vacuum switching tube may be cooled. Specifically, one end of each static contact piece 3 far away from the movable contact piece 4 is respectively fixed with a cooling component 5, the cooling component 5 that the components of a whole that can function independently set up is convenient for loading and unloading maintenance alone, and the structure is colder alive, and small in size only carries out quick cooling to the one end of static contact piece 3 far away from the movable contact piece 4, occupies vacuum contactor's whole space little, does not need to carry out the change by a wide margin to vacuum contactor, and is with low costs, is convenient for realize.

Further, referring to fig. 1-3, in some embodiments, the cooling assembly 5 includes a stationary plate 51 and a cooling tube 52. The fixed disc 51 is fixedly attached to the end face of the fixed contact element 3, which is far away from the movable contact element 4, and the attached arrangement can enlarge the heat conduction area, so that the heat conduction is facilitated to quickly transfer heat to the fixed disc 51; the cooling tube 52 is fixed to the fixed plate 51, and thereby absorbs heat. The cooling pipe 52 may be filled with cooling water, cooling insulating liquid, or cold air. The fixed disk 51 plays a role in heat conduction on the one hand, and on the other hand, supports the position fixing of the cooling pipe 52, so that the cooling pipe 52 can be stably fixed at one end, far away from the movable contact 4, of the fixed contact 3 through the fixed disk 51, and the reliability is good.

Further, referring to fig. 1-3, in some embodiments, the fixing plate 51 is provided with an annular groove 511, and at least part of the cooling tube 52 is fixed in the annular groove 511 in a limited manner. The annular groove 511 increases the contact area between the cooling tube 52 and the fixing disc 51, which is beneficial to improving the heat conducting performance, and the annular groove 511 is a limiting groove, so that the position of the cooling tube 52 can be effectively limited, the fixing is more reliable, in some embodiments, the cooling tube 52 can be made of a tube which is not easy to deform, the shaping is convenient, and the limitation is not particularly made.

Referring to fig. 1-3, in some embodiments, the fixed disc 51 is in a shape of a cake, the annular groove 511 is formed on the peripheral side wall of the fixed disc 51 in a surrounding manner, and the cake-shaped fixed disc 51 just abuts against the end face of the end, far from the movable contact 4, of the fixed contact 3, so that a sufficient heat conduction contact area is ensured; the annular groove 511 is formed on the peripheral side wall of the fixed disc 51 in a surrounding manner, so that the cooling pipe 52 can be coiled and fixed on the peripheral side of the fixed disc 51 like a pipe hoop, and the cooling pipe 52 is convenient to assemble and disassemble and is convenient to disassemble and maintain.

Still further, referring to fig. 1-3, in some embodiments, the vacuum contactor further includes a dead end wire row 6, and the dead end wire row 6 is a conventional copper or aluminum row or other adapting structure. The static terminal line row 6 is electrically connected with one end of the static contact piece 3 far away from the movable contact piece 4, and the fixed disc 51 is clamped between the static terminal line row 6 and the static contact piece 3, so that the position of the fixed disc 51 is fixed by the aid of the conventional structure of the vacuum contactor, and the vacuum contactor is simple in structure and low in cost.

In addition, referring to fig. 1-3, the stationary terminal wire row 6 is fastened and connected to one end of the stationary contact 3 far away from the movable contact 4 through the screw 7, and the fixing disc 51 is provided with a through hole 512 through which the screw 7 passes, so that the structure is simple, the cost is low, the screw 7 is convenient to assemble and disassemble, and the screw 7 passes through the through hole 512 to also play a limiting role on the fixing disc 51. Referring to fig. 1 to 3, there are a plurality of, for example three, through holes 512, and a plurality of through holes 512 are respectively penetrated with a screw 7, so that the vibration of the vacuum contactor or the vibration of other vacuum contactors can be prevented from causing the vibration falling off of the fixed disc 51, the fixed disc 51 can be firmly fixed between the fixed terminal line row 6 and one end of the fixed contact 3 far away from the movable contact 4, and the fixed disc is stable and reliable in position.

The foregoing is merely exemplary of the present utility model, and those skilled in the art should not be considered as limiting the utility model, since modifications may be made in the specific embodiments and application scope of the utility model in light of the teachings of the present utility model.

Claims

1. A vacuum contactor, comprising:

a frame body (1);

the vacuum switch tube comprises a tube body (2) arranged on the frame body (1), a static contact piece (3) fixed at one end of the tube body (2) and a movable contact piece (4) which can slide along the axial direction of the tube body (2) and is arranged at the other end of the tube body (2), wherein the movable contact piece (4) can make on-off reciprocating motion relative to the static contact piece (3);

and the cooling assembly (5) is arranged on one side of the vacuum switch tube and used for cooling the vacuum switch tube.

2. Vacuum contactor according to claim 1, characterized in that the cooling assembly (5) is arranged at the end of the stationary contact (3) remote from the movable contact (4).

3. Vacuum contactor according to claim 2, characterized in that said cooling assembly (5) comprises:

a fixed disc (51) which is fixed on the end surface of one end of the static contact piece (3) far away from the movable contact piece (4) in a leaning way;

and a cooling pipe (52) fixed to the fixed plate (51).

4. A vacuum contactor according to claim 3, wherein the fixing plate (51) is provided with an annular groove (511), and at least part of the cooling tube (52) is fixed in the annular groove (511).

5. The vacuum contactor according to claim 4, wherein the fixed disk (51) is in the shape of a circular cake, and the annular groove (511) is circumferentially provided on a peripheral side wall of the fixed disk (51).

6. A vacuum contactor as claimed in claim 3, further comprising:

and the fixed end wiring row (6) is in conductive connection with one end of the fixed contact piece (3) far away from the movable contact piece (4), and the fixed disc (51) is clamped between the fixed end wiring row (6) and the fixed contact piece (3).

7. Vacuum contactor according to claim 6, characterized in that the stationary terminal block (6) is fastened to the end of the stationary contact (3) remote from the moving contact (4) by means of a screw (7), and the stationary plate (51) is provided with a through hole (512) through which the screw (7) passes.

8. The vacuum contactor according to claim 7, wherein there are a plurality of said through holes (512).

9. Vacuum contactor according to any of claims 1-8, characterized in that there are a plurality of said vacuum switching tubes, one of said cooling modules (5) being fixed to each side of each vacuum switching tube.

10. The vacuum contactor according to any of claims 1-8, further comprising:

the armature assembly (8) is arranged on the frame body (1);

the transmission crank arm (9) is arranged on the frame body (1), one end of the transmission crank arm (9) is in transmission connection with the movable contact piece (4), and the other end of the transmission crank arm is connected with the armature component (8);

the electromagnetic switch mechanism (10) comprises an electromagnetic coil arranged on the frame body (1), and the electromagnetic coil is used for absorbing and driving the armature assembly (8) after being electrified so as to drive the movable contact piece (4) to make contact with the static contact piece (3) to perform closing movement.