CN220085923U

CN220085923U - Vacuum contactor

Info

Publication number: CN220085923U
Application number: CN202321597423.7U
Authority: CN
Inventors: 陈柳露; 张周文; 洪聪毅
Original assignee: Xiamen Huadian Switchgear Co Ltd
Current assignee: Xiamen Huadian Switchgear Co Ltd
Priority date: 2023-06-21
Filing date: 2023-06-21
Publication date: 2023-11-24
Anticipated expiration: 2033-06-21

Abstract

The utility model discloses a vacuum contactor, which comprises a switching-on mechanism and a switching-off mechanism, wherein the switching-on mechanism comprises a switching-on retaining component and a switching-on retaining spring component, the switching-on retaining spring component is arranged in the switching-on retaining component in a penetrating manner and is in transmission connection with the switching-on retaining component, the switching-off mechanism comprises a manual switching-off switch, a switching-off coil and a switching-off transmission component, the manual switching-off switch is connected with the switching-off coil, the switching-off coil is arranged between the manual switching-off switch and the switching-off transmission component, and one end, far away from the switching-off coil, of the switching-off transmission component is connected with the switching-on retaining component; the vacuum contactor is compact in structure, convenient to install and replace and high in reliability of separating brake.

Description

Vacuum contactor

Technical Field

The utility model relates to the field of power switching equipment, in particular to a vacuum contactor.

Background

The vacuum contactor is an important basic element in the electrical industry, and is one of switching appliances widely applied in power systems. The vacuum contactor is mainly used for switching on or off an AC/DC main circuit and a large-capacity control circuit frequently at a long distance. When the contactor works, the performance and the service life of the contactor are greatly reduced due to the reasons of bouncing of the movable contact, abrasion caused by collision between the armature and the fixed iron core, ablation of the contact by the arc and the like.

The switching-on and switching-off structure of the vacuum contactor commonly used at present comprises the following components:

1. the switching-on keeps and links to each other with the clapper, keeps the knot setting in the below of clapper, and the separating brake passes through keysets and axle change the direction of force, and the separating brake coil setting is in the next door of closing a floodgate coil.

2. A single switching-on coil is adopted, the switching-on coil is connected with the main rotating shaft, the switching-on holding module is positioned below the main rotating shaft, and the switching-off coil is independently arranged;

3. and a permanent magnet operating mechanism is arranged, and the action of the permanent magnet operating mechanism is controlled by a controller, so that the switching-on and switching-off operations are realized.

The vacuum contactors adopting the structures 1 and 2 have larger volume and poor layout stability; the vacuum contactor adopting the structure 3 needs to be provided with a control circuit board, and has the problem of electromagnetic compatibility.

It can be seen that there is a need for improvements and improvements in the art.

Disclosure of Invention

In view of the above-mentioned shortcomings of the prior art, an object of the present utility model is to provide a vacuum contactor, which aims to improve the driving stability of the vacuum contactor.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

in one aspect, the utility model discloses a vacuum contactor comprising:

the closing mechanism comprises a closing holding assembly and a closing holding spring assembly, and the closing holding spring assembly is arranged in the closing holding assembly in a penetrating manner and is in transmission connection with the closing holding assembly;

the brake separating mechanism comprises a manual brake separating switch, a brake separating coil and a brake separating transmission assembly, wherein the manual brake separating switch is connected with the brake separating coil, the brake separating coil is arranged between the manual brake separating switch and the brake separating transmission assembly, and one end, far away from the brake separating coil, of the brake separating transmission assembly is connected with the brake closing maintaining assembly.

In some embodiments of the present utility model, the moving direction of the brake release transmission assembly is the same as the axial direction of the manual brake release switch and the brake release coil.

In some embodiments of the present utility model, the closing maintaining assembly includes two closing maintaining members arranged opposite to each other, and the two closing maintaining members are distributed at intervals and connected with one end of the opening transmission assembly, which is far away from the opening coil, through rivets;

one end of the closing holding spring assembly penetrates through the space between the two closing holding pieces and is located above the opening transmission assembly.

In some embodiments of the utility model, the closing holder is a sheet metal part.

In some embodiments of the present utility model, a gap is left between the brake release coil and the brake release transmission assembly.

In some embodiments of the utility model, the vacuum contactor further comprises a box, and the closing mechanism and the opening mechanism are arranged in the box.

In some embodiments of the utility model, the box is provided with a detachable rear panel, and the closing holding assembly is arranged in the box at a position close to the rear panel.

In some embodiments of the utility model, the rear panel is provided with an access opening, and the access opening is covered with an access cover plate.

In some embodiments of the utility model, the closing hold spring assembly includes:

one end of the connecting shaft is connected to the overhaul cover plate, and the other end of the connecting shaft extends towards the closing holding assembly;

the connecting shaft is sleeved with a closing spring, one end, close to the opening transmission assembly, of the connecting shaft is provided with a first limiting piece, the diameter of the first limiting piece is larger than the inner diameter of the closing retaining spring assembly, two ends of the closing spring are limited between the first limiting piece and the inner side of the overhaul cover plate, the connecting shaft is also sleeved with a second limiting piece, the second limiting piece is located between the closing retaining assembly and the overhaul cover plate, the outer diameter of the second limiting piece is larger than the distance between two sheet metal pieces of the closing retaining assembly, and the inner diameter of the second limiting piece is larger than the outer diameter of the connecting shaft but not larger than the outer diameter of the closing spring.

In some embodiments of the present utility model, the closing mechanism further includes a closing maintaining component supporting plate, the closing maintaining component supporting plate is disposed at one end of the closing maintaining component far away from the opening transmission component, one side of the closing maintaining component supporting plate facing the closing maintaining component is connected with two mounting ears disposed oppositely, the two mounting ears are disposed at intervals, and one end of the closing maintaining component far away from the opening transmission component rotates with the mounting ears.

In some embodiments of the present utility model, the brake release mechanism further comprises:

the two brake separating springs are arranged and are respectively arranged at two sides of the brake separating transmission assembly in a relative mode;

the vacuum contactor further includes:

the two buffers are configured and are respectively arranged at two sides of the closing mechanism in a relative mode.

The beneficial effects are that:

the utility model provides a vacuum contactor, which is characterized in that a closing holding assembly and a brake separating transmission assembly are connected together, a brake separating holding spring assembly is arranged in the closing holding assembly in a penetrating manner, so that the compactness of the structure among the brake separating holding assembly, the brake separating holding spring assembly and the brake separating transmission assembly is improved, the integration between the closing holding assembly and the brake separating transmission assembly is realized, the installation and the replacement are convenient, the transmission between the closing holding assembly and the brake separating transmission assembly is more effective, the stability is higher, and the closing reliability is improved.

Drawings

Fig. 1 is a schematic structural diagram of an air contactor according to an embodiment of the present utility model.

Fig. 2 is a cross-sectional view taken along A-A of fig. 1.

Fig. 3 is a schematic connection diagram of a switching mechanism and a switching transmission assembly according to an embodiment of the present utility model.

Fig. 4 is a schematic structural view of an air contactor according to another embodiment of the present utility model (without an access cover).

Fig. 5 is a schematic structural diagram of an air contactor according to another embodiment of the present utility model.

Description of main reference numerals: 1. a closing mechanism; 11. a closing holding assembly; 111. a closing holder; 12. a closing hold spring assembly; 121. a connecting shaft; 122. a closing spring; 123. a first limiting member; 124. a second limiting piece; 13. a closing holding assembly support plate; 14. a mounting ear; 2. a brake separating mechanism; 21. a manual brake-separating switch; 22. a brake-separating coil; 23. a brake separating transmission assembly; 24. a brake separating spring; 3. a case; 31. a rear panel; 32. an access opening; 33. an access panel; 4. a buffer.

Detailed Description

The present utility model provides a vacuum contactor, and for making the purpose, technical scheme and effect of the present utility model more clear and definite, the present utility model will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically connected, electrically connected or can be communicated with each other; 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 can be understood by those of ordinary skill in the art according to the specific circumstances.

Referring to fig. 1 and 2, the present utility model provides a vacuum contactor, which has a simple structure and can be used for frequently switching on or off an ac/dc main circuit and a large capacity control circuit at a long distance. The vacuum contactor comprises a contact system, an arc extinguishing system and an operating system; the operating system comprises a closing mechanism 1 and a separating mechanism 2, and the closing operation or separating effect can be rapidly and stably realized through the linkage of the closing mechanism 1 and the separating mechanism 2. The closing mechanism 1 comprises a closing holding assembly 11 and a closing holding spring assembly 12, wherein the closing holding spring assembly 12 is penetrated in the closing holding assembly 11 and is in transmission connection with the closing holding assembly 11 to realize closing operation; the compactness between the closing holding spring assembly 12 and the closing holding assembly 11 is high, so that the volume of the vacuum contactor can be reduced to a certain extent, and the product cost is reduced; the opening mechanism 2 comprises a manual opening switch 21, an opening coil 22 and an opening transmission assembly 23, wherein the manual opening switch 21 is connected with the opening coil 22, the opening coil 22 is arranged between the manual opening switch 21 and the opening transmission assembly 23, one end, far away from the opening coil 22, of the opening transmission assembly 23 is connected with the closing holding assembly 11, the opening transmission assembly 23 is connected with the closing holding assembly 11 into a whole, transmission is more reliable, and closing stability is improved.

The moving direction of the brake separating transmission assembly 23 is the same as the axial direction of the manual brake separating switch 21 and the brake separating coil 22, so that the arrangement of the manual brake separating switch 21, the brake separating coil 22 and the brake separating transmission assembly 23 is optimized, the structural compactness among the three is improved, the power transmission direction among the three can be realized on the same straight line, the transmission is more direct, the stability is higher, and the brake separating reliability of the vacuum contactor is improved.

The manual switch 21 is a button type manual switch 21, and the button part of the manual switch 21 protrudes out of the outer surface of the vacuum contactor, so that the operation is convenient. The center shaft of the manual brake-separating switch 21 is connected with the center shaft of the brake-separating coil 22, and the brake-separating coil 22 can be electrified by pressing the manual brake-separating switch 21, so that the brake-separating transmission assembly 23 is driven to move, brake-separating operation is realized, and the transmission effect is high.

As shown in fig. 3, the closing holding assembly 11 includes two closing holding pieces 111 arranged opposite to each other, the two closing holding pieces 111 are distributed at intervals, and are connected with one end of the opening transmission assembly 23, which is far away from the opening coil 22, through rivets; the closing maintaining piece 111 generally adopts a metal sheet with small thickness, and is connected in a riveting mode, so that the closing maintaining piece 111 is not easy to deform, and is strong in tightness and high in connection stability, and the closing reliability of the vacuum contactor is improved.

One end of the closing holding spring assembly 12 is arranged between the two closing holding pieces 111 in a penetrating manner and is positioned above the opening transmission assembly 23, so that the structure is high in compactness, the volume of the vacuum contactor can be reduced, and the applicability of the vacuum contactor is improved; in addition, the switching-on speed can be increased, the quick contact is ensured, and the generation of electric arcs is reduced.

Preferably, the closing retainer 111 is a sheet metal part, which has standard shape and light weight, and can improve the closing reliability of the vacuum contactor. In addition, the sheet metal process saves materials, has simple processing technology and can reduce the production cost. In addition, the sheet metal process is also suitable for small-batch production, and is suitable for production of products with various contactor types and various specifications.

As shown in fig. 2, a gap is left between the brake separating coil 22 and the brake separating transmission assembly 23, the brake separating coil 22 and the brake separating transmission assembly 23 are separately arranged, so that the problem of the brake separating coil 22 or the brake separating transmission assembly 23 can be more intuitively judged, and the brake separating stability of the vacuum contactor cannot be influenced.

As shown in fig. 2, the vacuum contactor further comprises a box body 3, the box body 3 is formed by splicing a plurality of panels, an accommodating space is formed in the box body 3, and the closing mechanism 1 and the opening mechanism 2 are arranged in the box body 3, so that the box body 3 can play a certain role in protecting and isolating the closing mechanism 1 and the opening mechanism 2, and the integrity and the cleanliness of the vacuum contactor are improved. In the preferred embodiment, the case 3 is made of an insulating material, so that the safety of the vacuum contactor can be improved.

Further, the box 3 is provided with a detachable rear panel 31, and the closing holding assembly 11 is arranged in the box 3 and close to the rear panel 31, so that maintenance of the closing holding assembly 11 is facilitated. Specifically, the rear panel 31 and the side plate, the bottom plate or the panel of the case 3 may be connected by a clamping manner, or by a screw connection manner, so that the disassembly is convenient, and the connection stability is good.

As shown in fig. 4 and 5, an access opening 32 is provided in the rear panel 31, and components located near the access opening 32, such as the closing holding assembly 11, the closing holding spring assembly 12, and the like, can be inspected in a small range through the access opening 32. The access cover plate 33 is covered on the access opening 32, so that the exposed area of the internal parts of the box body 3 can be reduced, and the possibility that pollutants enter the box body 3 can be reduced. In addition, the access panel 33 also has a securing and limiting effect on the brake hold spring assembly 12.

As shown in fig. 2 and 3, the closing holding spring assembly 12 includes a connection shaft 121 and a closing spring 122; one end of the connecting shaft 121 is connected to the access cover 33, and the other end extends toward the closing holding assembly 11; the closing spring 122 is sleeved on the connecting shaft 121, a first limiting piece 123 is arranged at one end, close to the opening transmission assembly 23, of the connecting shaft 121, the diameter of the first limiting piece 123 is larger than the inner diameter of the closing holding spring assembly 12, and two ends of the closing spring 122 are limited between the first limiting piece 123 and the inner side of the access cover plate 33, so that the closing spring 122 can be constrained by the first limiting piece 123 and the access cover plate 33 when elastic potential energy is released. The first limiting part 123 is in a ring shape, so that when the closing spring 122 contacts with the first limiting part, the force can be uniformly applied, and the stability of the closing spring 122 when the elastic potential energy is released is improved. The connecting shaft 121 is further provided with a limit nut on one side away from the access cover plate 33, and the limit nut is arranged on one side, opposite to the closing spring 122, of the first limit piece 123, so that the first limit piece 123 can be limited, and the first limit piece 123 cannot be separated from the connecting shaft 121. The connecting shaft 121 is further sleeved with a second limiting piece 124, the second limiting piece 124 is located between the closing maintaining assembly 11 and the overhaul cover 33, the outer diameter of the second limiting piece 124 is larger than the distance between two sheet metal parts of the closing maintaining assembly 11, and the inner diameter of the second limiting piece 124 is larger than the outer diameter of the connecting shaft 121 but not larger than the outer diameter of the closing spring 122. Thus, when the switch-on holding assembly 11 is switched off, the second limiting member 124 can be driven to compress the switch-on spring 122, and the switch-on spring 122 stores elastic potential energy. Specifically, the second limiting block is in a ring shape, so that the closing spring 122 compressed by the second limiting block can be uniformly stressed, and the stability of the closing effect of the closing spring is ensured.

As shown in fig. 3, the closing mechanism 1 further includes a closing maintaining assembly supporting plate 13, the closing maintaining assembly supporting plate 13 is disposed at one end of the closing maintaining assembly 11 far away from the opening transmission assembly 23, and two opposite mounting lugs 14 are connected to one side of the closing maintaining assembly supporting plate 13 facing the closing maintaining assembly 11, two spaced through grooves are disposed on the closing maintaining assembly supporting plate 13, and the two mounting lugs 14 are respectively inserted into the two through grooves and are disposed at intervals; one end of the closing holding assembly 11 far away from the opening transmission assembly 23 is arranged between the two mounting lugs 14 and is rotationally connected with the mounting lugs 14, the contact area between the mounting lugs 14 and the closing holding assembly 11 is large, and the closing holding assembly 11 can generate a certain stabilizing effect, so that the closing holding assembly 11 can stably realize closing and opening operation under the driving of the opening transmission assembly 23.

In order to further improve the connection precision between the mounting lug 14 and the closing maintaining assembly 11, the mounting lug 14 is connected with the closing maintaining assembly 11 through rivets, so that the connection strength and the connection stability between the mounting lug 14 and the closing maintaining assembly 11 are improved, and the closing reliability of the air contactor is improved.

As shown in fig. 2, 4 and 5, the brake separating mechanism 2 is further provided with two brake separating springs 24, and the two brake separating springs 24 are respectively and oppositely arranged at two sides of the brake separating transmission assembly 23; the two sides of the brake separating transmission assembly can be uniformly stressed, so that brake separating operation is stably realized.

The vacuum contactor further comprises two buffers 4, wherein the buffers 4 are oil pressure buffers 4, and the two oil pressure buffers are arranged on two sides of the closing mechanism 1 respectively and oppositely. The buffer 4 can reduce the vibration generated when the vacuum contactor is opened, can improve the stability of opening the door while realizing quick opening, and optimize the opening effect, thereby prolonging the service life of the vacuum contactor. The buffer 4 is fixed in the mounting block and is screwed on the box body 3 through the mounting block, so that the assembly and the disassembly are convenient; and the installation position of the buffer 4 is close to the rear panel 31 of the box body 3, so that the later overhaul and maintenance are convenient. The two buffers 4 are respectively arranged relative to the two opening springs 24, and the axial directions of the buffers 4 and the axial directions of the opening springs 24 are mutually parallel, so that the buffers 4 can more effectively absorb vibration generated when the opening springs 24 open the gate, and rapid and stable opening operation is realized.

Further, the rear panel 31 of the case 3 is provided with viewing windows corresponding to the two buffers 4, respectively, through which the working state of the buffers 4 can be intuitively seen, so that the daily monitoring and the overhauling and maintenance of the staff are facilitated.

In summary, according to the utility model, the closing holding assembly 11 and the opening transmission assembly 23 are connected together, and the opening holding spring 122 assembly is arranged in the closing holding assembly 11 in a penetrating manner, so that the compactness of the vacuum contactor structure is improved, and the transmission stability and the closing speed of the vacuum contactor are optimized; in addition, through setting up manual brake switch 21, brake coil 22 and brake transmission subassembly 23 collinearly for the transmission between manual brake switch 21, brake coil 22 and the brake transmission subassembly 23 is more direct, improves vacuum contactor's brake reliability, can further improve vacuum contactor's compact structure moreover, thereby reduces vacuum contactor's volume, reduces product cost, improves vacuum contactor's suitability.

In addition, the closing maintaining assembly 11 adopts two sheet metal parts and is riveted with the opening transmission assembly 23, so that the connection precision between the closing maintaining assembly 11 and the opening transmission assembly 23 is improved, and the closing reliability is improved.

By arranging two buffers 4 opposite to the brake separating coil 22, the vibration generated by the brake separating of the vacuum contactor is reduced, the brake separating stability is improved, the brake separating effect is optimized, and the service life of the vacuum contactor is prolonged.

It will be understood that equivalents and modifications will occur to those skilled in the art and are to be included within the scope of the utility model as defined in the following claims.

Claims

1. A vacuum contactor, comprising:

2. The vacuum contactor according to claim 1, wherein a moving direction of said opening transmission assembly is the same as an axial direction of said manual opening switch and said opening coil.

3. The vacuum contactor according to claim 1, wherein the closing holding assembly comprises two closing holding members arranged opposite to each other, the two closing holding members are spaced apart and connected with one end of the opening transmission assembly away from the opening coil by rivets;

4. A vacuum contactor according to claim 3, wherein the closing holder is a sheet metal part.

5. The vacuum contactor of claim 1, wherein a gap is left between said brake release coil and said brake release drive assembly.

6. The vacuum contactor according to claim 1, further comprising a housing, wherein the closing mechanism and the opening mechanism are disposed within the housing.

7. The vacuum contactor according to claim 6, wherein said housing is provided with a removable rear panel, said closing retaining assembly being disposed within said housing adjacent said rear panel.

8. The vacuum contactor according to claim 7, wherein said rear panel is provided with an access opening, said access opening being capped with an access panel.

9. The vacuum contactor according to claim 8, wherein said closing hold spring assembly comprises:

10. The vacuum contactor according to claim 6, wherein said closing mechanism further comprises:

the switching-on keeps the subassembly backup pad, set up in the switching-on keeps the subassembly keep away from separating brake drive assembly's one end, just the switching-on keeps the subassembly backup pad orientation one side that keeps the subassembly in the switching-on is connected with two installation ears that set up relatively, two installation ear interval sets up, the switching-on keep the subassembly keep away from separating brake drive assembly's one end with the installation ear rotates to be connected.

11. The vacuum contactor according to claim 6, wherein said opening mechanism further comprises:

the vacuum contactor further includes: