CN217035508U

CN217035508U - Switch structure

Info

Publication number: CN217035508U
Application number: CN202220694544.2U
Authority: CN
Inventors: 袁松强; 王广先; 吴昊; 裴军
Original assignee: Chint Electric Co Ltd
Current assignee: Chint Electric Co Ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-22
Anticipated expiration: 2032-03-22

Abstract

The present invention provides a switch structure comprising: a first contact; the second contact is provided with a contact end and a connecting end, the connecting end of the second contact is hinged with the first contact, and the second contact is rotatably arranged relative to the first contact so that the contact end of the second contact is contacted with or disconnected from the closing contact; the contact end of the second contact is provided with a plurality of first contact fins which are all contacted with the closing contact; the plurality of first contact fins are arranged at intervals along the width direction of the second contact so as to form a first heat dissipation gap between every two adjacent first contact fins; the connecting end of the second contact is provided with a connecting column, the connecting column protrudes towards the direction close to the first contact relative to the second contact, and at least part of the end face of the connecting column is attached to the first contact. The utility model solves the problem of higher temperature rise of the switch structure in the prior art.

Description

Switch structure

Technical Field

The utility model relates to the technical field of a power equipment isolating switch conducting system, in particular to a switch structure.

Background

The isolating switch is one of main components in the high-voltage switch cabinet, and the operation reliability of the isolating switch is directly related to the safety of a power system; the isolating switch mainly comprises a moving contact and a fixed contact, and the contact piece of the moving contact moves to realize the contact or disconnection with the main bus.

In an existing isolating switch structure, a moving contact generally comprises a plurality of blades, one end of each blade is connected with a fixed contact in a surface contact mode, the blades rotate relative to the fixed contact to perform opening or closing, and a protruding point is arranged at the other end of each blade and forms point contact with a closing contact.

However, because the flatness of the contact between the blade and the surface of the fixed contact is difficult to control, the contact area of the point contact formed by the convex point on the other end of the cutter head and the closing contact is small, the contact pressure is difficult to guarantee, the loop resistance of the isolating switch is large, and the temperature rise of the isolating switch is high.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a switch structure to solve the problem that the switch structure in the prior art is high in temperature rise.

In order to achieve the above object, the present invention provides a switch structure comprising: a first contact; the second contact is provided with a contact end and a connecting end, the connecting end of the second contact is hinged with the first contact, and the second contact is rotatably arranged relative to the first contact so that the contact end of the second contact is contacted with or disconnected from the closing contact; the contact end of the second contact is provided with a plurality of first contact fins which are all contacted with the closing contact; the plurality of first contact fins are arranged at intervals along the width direction of the second contact so as to form a first heat dissipation gap between every two adjacent first contact fins; the connecting end of the second contact is provided with a connecting column, the connecting column protrudes towards the direction close to the first contact relative to the second contact, and at least part of the end face of the connecting column is attached to the first contact.

Furthermore, a contact end face which is contacted with the closing contact is arranged on the first contact fin, the contact end face protrudes relative to the surface of the first contact fin, and the contact end face is a curved face; and/or the distance between two adjacent first contact fins is gradually reduced along the direction from the contact end to the connection end.

Furthermore, a plurality of second contact fins are arranged on the connecting column, and are attached to the first contact; be provided with the through-hole on the spliced pole, a plurality of second contact fins set up around the through-hole interval to form second heat dissipation clearance between two adjacent second contact fins.

Furthermore, the connecting end of the second contact comprises a first end face and a second end face which are oppositely arranged, and a groove opposite to the connecting column is arranged on the second end face; the connecting column and the plurality of second contact fins are arranged on the first end face, the second contact fins are provided with third end faces opposite to the first contact, and the third end faces are curved faces; the curvature of the third end surface is gradually increased from the circumferential surface of the connecting column to the center direction of the connecting column.

Furthermore, the second contact fin comprises a joint end face and a spacing end face, the joint end face is jointed with the first contact, and two ends of the spacing end face are respectively connected with the joint end face and the hole wall face of the through hole; a preset included angle is formed between the spacing end face and the attaching end face, and the preset included angle is an obtuse angle or an acute angle.

Further, the switch structure further comprises: the rotating shaft sequentially penetrates through the first contact and the second contact, and the second contact rotates around the rotating shaft; the stop block is arranged at the end part of the rotating shaft, and the stop block protrudes outwards relative to the shaft body of the rotating shaft so as to stop the second contact; and the pressing part is arranged between the stop block and the second contact, is respectively attached to the second contact and the stop block, and is arranged in a telescopic manner along the axis direction of the rotating shaft.

Furthermore, the second contact comprises a first unit contact and a second unit contact which are oppositely arranged, and an avoidance space for avoiding the closing brake contact is arranged between the first unit contact and the second unit contact; the switch structure further includes: and at least part of the connecting assembly is arranged in a telescopic manner along the horizontal direction, and two ends of the connecting assembly are respectively connected with the first unit contact and the second unit contact.

Further, the connection assembly includes: the first tension spring is arranged at the contact end of the second contact, and two ends of the first tension spring are respectively connected with the first unit contact and the second unit contact; and/or a second tension spring is arranged at the connecting end of the second contact, and two ends of the second tension spring are respectively connected with the first unit contact and the second unit contact; and/or the pull rod, wherein two ends of the pull rod are respectively connected with the first unit contact and the second unit contact, and the pull rod is arranged at one end close to the contact end.

Further, the switch structure further comprises: and at least part of the driving assembly is movably arranged along a preset track, and the driving assembly is in driving connection with the second contact and drives the second contact to rotate through the driving assembly.

Further, be provided with the spout on the second contact, the spout extends along the length direction of second contact, and drive assembly includes: the rotating rod is rotatably arranged around the axis of the rotating rod, and an included angle is formed between the extending direction of the rotating rod and the extending direction of the second contact; the connecting block is sleeved on the rotating rod and movably arranged along the extending direction of the rotating rod, and part of the connecting block is inserted into the sliding groove so as to drive the second contact to rotate in the moving process of the connecting block.

By applying the technical scheme of the utility model, the switch structure comprises a first contact and a second contact, wherein the second contact is provided with a contact end and a connecting end, the connecting end of the second contact is hinged with the first contact, and the second contact is rotatably arranged relative to the first contact so as to enable the contact end of the second contact to be in contact with or disconnected from the closing contact; the contact end of the second contact is provided with a plurality of first contact fins which are all contacted with the closing contact; the plurality of first contact fins are arranged at intervals along the width direction of the second contact so as to form a first heat dissipation gap between two adjacent first contact fins. The arrangement can utilize the contact of the first contact fins and the closing contact to ensure the electric connection stability of the first contact and the closing contact, and meanwhile, in the process of the contact of the first contact fins and the closing contact, the generated heat is dissipated through the first heat dissipation gap, so that the condition that the temperature of the second contact rises too fast can be avoided, and the service life of the switch structure is prolonged.

Drawings

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

fig. 1 shows a schematic structural view of an embodiment of a switch structure according to the utility model;

FIG. 2 shows a top view of a switch structure according to the present invention;

fig. 3 shows a schematic view of a second contact of the switching structure according to the utility model;

fig. 4 shows a schematic view of the connection of a first contact to a second contact of a switching structure according to the utility model;

fig. 5 shows a schematic view of the structure of the first or second unit contact of the switching structure according to the utility model;

fig. 6 shows a front view of a first or second unit contact of the switching structure according to the utility model;

fig. 7 shows a cross-sectional view a-a of the first unit contact or the second unit contact in the switching configuration according to fig. 6;

fig. 8 shows a schematic diagram of the drive assembly in a switch configuration according to the utility model.

Wherein the figures include the following reference numerals:

100. closing a contact;

1. a first contact;

2. a second contact; 21. a contact end; 22. a connecting end; 221. a first end face; 222. a second end face; 2220. a groove; 23. a first contact fin; 230. a first heat dissipation gap; 231. a contact end face; 24. connecting columns; 240. a second contact fin; 241. a second heat dissipation gap; 2401. fitting an end face; 2402. a spacer end face; 2403. a third end face; 243. a through hole; 201. a first unit contact; 202. a second unit contact; 203. avoiding a space; 25. a chute;

3. a rotating shaft; 4. a stop block; 5. a pressing member; 50. a gasket; 51. a disc spring; 6. a connecting assembly; 61. a first tension spring; 62. a second tension spring; 63. a pull rod; 7. a drive assembly; 70. rotating the rod; 71. and (4) connecting the blocks.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.

Referring to fig. 1 to 8, the present invention provides a switch structure, including: a first contact 1; a second contact 2, the second contact 2 having a contact end 21 and a connection end 22, the connection end 22 of the second contact 2 being hinged to the first contact 1, the second contact 2 being rotatably arranged with respect to the first contact 1 such that the contact end 21 of the second contact 2 is in contact with or disconnected from the closing contact 100; the contact end 21 of the second contact 2 is provided with a plurality of first contact fins 23, and the plurality of first contact fins 23 are all in contact with the closing contact 100; the plurality of first contact fins 23 are arranged at intervals in the width direction of the second contact 2 to form a first heat dissipation gap 230 between adjacent two first contact fins 23.

The switch structure comprises a first contact 1 and a second contact 2, wherein the second contact 2 is provided with a contact end 21 and a connecting end 22, the connecting end 22 of the second contact 2 is hinged with the first contact 1, and the second contact 2 is rotatably arranged relative to the first contact 1 so that the contact end 21 of the second contact 2 is in contact with or disconnected from a closing contact 100; the contact end 21 of the second contact 2 is provided with a plurality of first contact fins 23, and the plurality of first contact fins 23 are all in contact with the closing contact 100; the plurality of first contact fins 23 are arranged at intervals in the width direction of the second contact 2 to form a first heat dissipation gap 230 between adjacent two first contact fins 23. The arrangement can utilize the plurality of first contact fins 23 to contact with the closing contact 100, so as to ensure the electrical connection stability of the first contact 1 and the closing contact 100, and meanwhile, in the process of contacting the plurality of first contact fins 23 with the closing contact 100, the generated heat is dissipated through the first heat dissipation gap 230, so that the condition that the temperature rise of the second contact 2 is too fast can be avoided, and the service life of the switch structure is prolonged.

Specifically, as shown in fig. 3, the first contact fin 23 is provided with a contact end surface 231 contacting with the closing contact 100, the contact end surface 231 protrudes relative to the surface of the first contact fin 23, and the contact end surface 231 is a curved surface; and/or the distance between two adjacent first contact fins 23 gradually decreases in the direction from the contact end 21 to the connection end 22. Therefore, the contact area between the second contact 2 and the closing contact 100 can be reduced by using the curved surface, a heat dissipation gap is formed between two adjacent first contact fins 23 while the current-carrying capacity is met, the heat conduction between the closing contact 100 and the second contact 2 is reduced, meanwhile, the first contact fins 23 arranged at a plurality of first intervals can provide better feeding for the second contact 2 by using the elasticity of the material, and the contact effect with the closing contact 100 is ensured.

In a specific implementation, as shown in fig. 3 to 5, the connection end 22 of the second contact 2 is provided with a connection post 24, the connection post 24 protrudes toward the direction close to the first contact 1 relative to the second contact 2, and at least a part of the end face of the connection post 24 is attached to the first contact 1. The connecting column 24 is arranged to ensure that the second contact 2 is stably connected with the first contact 1, so that the first contact 1 and the second contact 2 are always kept in a contact state.

In order to reduce the thermal conductivity between the second contact 2 and the first contact 1, a plurality of second contact fins 240 are arranged on the connecting column 24, and the plurality of second contact fins 240 are attached to the first contact 1; the connecting column 24 is provided with a through hole 243, and a plurality of second contact fins 240 are arranged around the through hole 243 at intervals so as to form a second heat dissipation gap 241 between two adjacent second contact fins 240. By providing the plurality of second contact fins 240, the contact area between the second contact 2 and the first contact 1 is reduced, and the heat between the second contact 2 and the first contact 1 is dissipated by the second heat dissipation gap 241.

In one embodiment of the present invention, the connecting end 22 of the second contact 2 includes a first end surface 221 and a second end surface 222 disposed oppositely, the second end surface 222 is provided with a groove 2220 opposite to the connecting post 24; the connection column 24 and the plurality of second contact fins 240 are arranged on the first end surface 221, the second contact fins 240 have a third end surface 2403 opposite to the first contact 1, and the third end surface 2403 is a curved surface; the curvature of the third end surface 2403 gradually increases from the circumferential surface of the connecting column 24 to the center direction of the connecting column 24. Therefore, the connecting end 22 is sufficiently cooled by the second heat dissipation gaps 241, the current-carrying capacity is met, the influence of temperature rise is sufficiently considered, and meanwhile, the corresponding grooves 2220 are formed, so that the electric gap distance between the connecting end and the first contact 1 after the connecting end and the first contact are fixed can be increased. Preferably, groove 2220 is circular in cross-section.

In another embodiment provided by the present invention, the second contact fin 240 includes a fitting end surface 2401 and a spacing end surface 2402, the fitting end surface 2401 is fitted to the first contact 1, and both ends of the spacing end surface 2402 are connected to the fitting end surface 2401 and the hole wall surface of the through hole 243, respectively; the spacing end surface 2402 and the attaching end surface 2401 have a predetermined included angle therebetween, and the predetermined included angle is an obtuse angle or an acute angle. The arrangement is such that the spacing surfaces 2402 are spaced a predetermined distance from the first contact 1, and heat from the second contact 2 is dissipated by the spacing surfaces 2402, thereby avoiding conduction of high temperatures to the first contact 1.

In order to maintain the stability of the second contact 2 in a predetermined rotation trajectory, the switching structure further comprises: the rotating shaft 3 sequentially penetrates through the first contact 1 and the second contact 2, and the second contact 2 rotates around the rotating shaft 3; a stopper 4 provided at an end of the rotating shaft 3, the stopper 4 protruding outward with respect to a shaft body of the rotating shaft 3 to stop the second contact 2; and the pressing part 5 is arranged between the stop block 4 and the second contact 2, the pressing part 5 is respectively attached to the second contact 2 and the stop block 4, and the pressing part 5 is arranged in a telescopic manner along the axial direction of the rotating shaft 3. Preferably, the pressing part 5 includes a washer 50 and a disc spring 51, specifically, both ends of the rotating shaft 3 are provided with a stop block 4, and the disc spring 51 and the washer 50 are sequentially arranged in a direction from the second contact 2 to the stop block 4, and the disc spring 51 and the washer 50 apply pressure to the second contact 2, so that the second contact 2 can rotate back and forth on the same track, and contact with or separation from the closing contact 100 is realized. In this embodiment, one end of the rotating shaft 3 is provided with an external thread, so that one stopper 4 is screwed with the rotating shaft 3. The stop block 4 protrudes outward relative to the shaft body of the rotating shaft 3, i.e., the stop block 4 protrudes away from the axis of the rotating shaft 3.

In the embodiment provided by the utility model, the second contact 2 comprises a first unit contact 201 and a second unit contact 202 which are oppositely arranged, and an avoidance space 203 which is used for avoiding the closing contact 100 is arranged between the first unit contact 201 and the second unit contact 202; the switch structure further includes: and a connecting assembly 6, at least a part of the connecting assembly 6 is telescopically arranged along the horizontal direction, and two ends of the connecting assembly 6 are respectively connected with the first unit contact 201 and the second unit contact 202. Therefore, the first unit contact 201 and the second unit contact 202 are kept synchronous through the connecting component 6, the contact area between the second contact 2 and the closing contact 100 is increased, and the conductivity between the second contact 2 and the closing contact 100 is further improved. Wherein, the first unit contact 201 and the second unit contact 202 are respectively disposed at both ends of the rotating shaft 3, and the pressing members 5 are respectively disposed between the first unit contact 201 and the stopper 4 and between the second unit contact 202 and the stopper 4.

Specifically, as shown in fig. 3, the connection assembly 6 includes: a first extension spring 61 disposed at the contact end 21 of the second contact 2, both ends of the first extension spring 61 being connected to the first unit contact 201 and the second unit contact 202, respectively; and/or a second tension spring 62 disposed at the connection end 22 of the second contact 2, wherein two ends of the second tension spring 62 are connected to the first unit contact 201 and the second unit contact 202, respectively. The first tension spring 61 and/or the second tension spring 62 apply tension to the first unit contact 201 and the second unit contact 202, respectively, so that the first unit contact 201 and the second unit contact 202 can be brought into close contact with the closing contact 100.

Wherein, coupling assembling 6 still includes: and a pull rod 63, wherein both ends of the pull rod 63 are respectively connected with the first unit contact 201 and the second unit contact 202, and the pull rod 63 is arranged at one end close to the contact end 21. The pull rod 63 can limit the initial tension values of the first tension spring 61 and the second tension spring 62 within a predetermined range, further ensuring the synchronism between the first unit contact 201 and the second unit contact 202.

In an embodiment provided by the present invention, as shown in fig. 1 and 8, the switch structure further includes: and the driving assembly 7, at least part of the driving assembly 7 is movably arranged along a preset track, and the driving assembly 7 is connected with the second contact 2 in a driving way, and the driving assembly 7 drives the second contact 2 to rotate. The arrangement does not need manual operation on the second contact 2, and the structure is simple and the use is convenient.

Specifically, the second contact 2 is provided with a sliding slot 25, the sliding slot 25 extends along the length direction of the second contact 2, and the driving assembly 7 includes: a rotation lever 70 provided rotatably around its own axis, an extending direction of the rotation lever 70 and an extending direction of the second contact 2 having an angle therebetween; and a connecting block 71 that is fitted over the rotating rod 70 and is movably disposed along the extending direction of the rotating rod 70, and a part of the connecting block 71 is inserted into the sliding groove 25 to rotate the second contact 2 during the movement of the connecting block 71. Preferably, the rotating rod 70 is a threaded rod, and the connecting block 71 is in threaded connection with the rotating rod 70, and during the rotation of the rotating rod 70, the connecting block 71 moves along the length direction of the rotating rod 70 and slides in the sliding groove 25, thereby driving the second contact 2 to rotate.

From the above description, it can be seen that the above-described embodiments of the present invention achieve the following technical effects:

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A switch structure, comprising:

a first contact (1);

a second contact (2), wherein the second contact (2) is provided with a contact end (21) and a connecting end (22), the connecting end (22) of the second contact (2) is hinged with the first contact (1), and the second contact (2) is rotatably arranged relative to the first contact (1) so as to enable the contact end (21) of the second contact (2) to be in contact with or disconnected from a closing contact (100);

the contact end (21) of the second contact (2) is provided with a plurality of first contact fins (23), and the first contact fins (23) are all in contact with the closing contact (100); the first contact fins (23) are arranged at intervals along the width direction of the second contact (2) so as to form a first heat dissipation gap (230) between two adjacent first contact fins (23);

the connecting end (22) of the second contact (2) is provided with a connecting column (24), the connecting column (24) protrudes relative to the second contact (2) towards the direction close to the first contact (1), and at least part of the end face of the connecting column (24) is attached to the first contact (1).

2. The switch structure according to claim 1, characterized in that the first contact fin (23) is provided with a contact end surface (231) contacting with the closing contact (100), the contact end surface (231) is protruded relative to the surface of the first contact fin (23), and the contact end surface (231) is a curved surface; and/or

The distance between two adjacent first contact fins (23) is gradually reduced along the direction from the contact end (21) to the connection end (22).

3. The switching structure according to claim 1, characterized in that a plurality of second contact fins (240) are provided on the connection post (24), each of said second contact fins (240) conforming to the first contact (1);

the connecting column (24) is provided with a through hole (243), and the plurality of second contact fins (240) are arranged around the through hole (243) at intervals so as to form a second heat dissipation gap (241) between two adjacent second contact fins (240).

4. A switching structure according to claim 3, characterized in that the connecting end (22) of the second contact (2) comprises a first end face (221) and a second end face (222) arranged opposite each other, the second end face (222) being provided with a groove (2220) opposite the connecting post (24); the connecting column (24) and the plurality of second contact fins (240) are arranged on the first end face (221), the second contact fins (240) are provided with third end faces (2403) opposite to the first contact (1), and the third end faces (2403) are curved faces.

5. The switch structure according to claim 3, wherein the second contact fin (240) comprises a fitting end surface (2401) and a spacing end surface (2402), the fitting end surface (2401) is fitted with the first contact (1), and two ends of the spacing end surface (2402) are respectively connected with the fitting end surface (2401) and the hole wall surface of the through hole (243);

and a preset included angle is formed between the spacing end face (2402) and the fitting end face (2401), and the preset included angle is an obtuse angle or an acute angle.

6. The switch structure of claim 1, further comprising:

the rotating shaft (3) is sequentially arranged on the first contact (1) and the second contact (2) in a penetrating mode, and the second contact (2) rotates around the rotating shaft (3);

a stop block (4) arranged at an end of the rotating shaft (3), wherein the stop block (4) protrudes outwards relative to the shaft body of the rotating shaft (3) so as to stop the second contact (2);

the pressing part (5) is arranged between the stop block (4) and the second contact (2), the pressing part (5) is attached to the second contact (2) and the stop block (4) respectively, and the pressing part (5) is arranged in a telescopic mode along the axis direction of the rotating shaft (3).

7. The switch structure according to any one of claims 1 to 6, characterized in that the second contact (2) comprises a first unit contact (201) and a second unit contact (202) which are oppositely arranged, and an avoidance space (203) which avoids the closing contact (100) is arranged between the first unit contact (201) and the second unit contact (202);

the switch structure further includes: the connecting assembly (6), at least part of connecting assembly (6) sets up telescopically along the horizontal direction, the both ends of connecting assembly (6) respectively with first unit contact (201) and second unit contact (202) are connected.

8. The switch structure according to claim 7, characterized in that said connection assembly (6) comprises:

a first tension spring (61) arranged at the contact end (21) of the second contact (2), wherein two ends of the first tension spring (61) are respectively connected with the first unit contact (201) and the second unit contact (202); and/or the presence of a gas in the gas,

a second tension spring (62) disposed at the connection end (22) of the second contact (2), both ends of the second tension spring (62) being connected to the first unit contact (201) and the second unit contact (202), respectively; and/or

The two ends of the pull rod (63) are respectively connected with the first unit contact (201) and the second unit contact (202), and the pull rod (63) is arranged at one end close to the contact end (21).

9. The switch structure according to any one of claims 1 to 6, characterized in that it further comprises:

the driving assembly (7), at least part of the driving assembly (7) is movably arranged along a preset track, the driving assembly (7) is in driving connection with the second contact (2), and the second contact (2) is driven to rotate through the driving assembly (7).

10. The switching architecture according to claim 9, characterized in that a slide groove (25) is provided on the second contact (2), said slide groove (25) extending along the length of the second contact (2), said drive assembly (7) comprising:

the rotating rod (70) is rotatably arranged around the axis of the rotating rod, and an included angle is formed between the extending direction of the rotating rod (70) and the extending direction of the second contact (2);

connecting block (71), the cover is established dwang (70) is gone up and is followed the movably setting of extending direction of dwang (70), part connecting block (71) are inserted and are established in spout (25), with the in-process that connecting block (71) removed drives second contact (2) rotate.