Vacuum contactor

Abstract

The vacuum contactor comprises a closing mechanism and an opening mechanism, the closing mechanism comprises a closing maintaining assembly and a closing maintaining spring assembly, the closing maintaining spring assembly is arranged in the closing maintaining assembly in a penetrating mode and is in transmission connection with the closing maintaining assembly, and the opening mechanism comprises a manual opening switch, an opening coil and an opening transmission assembly. 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 assembly, and one end, far away from the switching-off coil, of the switching-off transmission assembly is connected with the switching-on maintaining assembly; the vacuum contactor is compact in structure, convenient to install and replace, and high in opening reliability.

Description

Technical Field

[0001] The present application relates to the field of power switch equipment, and in particular to a vacuum contactor. Background Art

[0002] Vacuum contactors are important basic components in the electrical industry and are one of the widely used switching devices in power systems. Vacuum contactors are mainly used to frequently connect or disconnect AC and DC main circuits and large-capacity control circuits over long distances. When the contactor is working, the bounce of the moving and static contacts, the wear caused by the collision between the armature and the static iron core, and the ablation of the contacts by the arc greatly reduce the performance and life of the contactor.

[0003] The commonly used vacuum contactor opening and closing structures include the following:

[0004] 1. The closing hold is connected to the snap plate, the holding buckle is set below the snap plate, the opening change the direction of force through the adapter plate and the shaft, and the opening coil is set next to the closing coil.

[0005] 2. Use a single closing coil, which is connected to the main shaft. The closing holding module is located below the main shaft, and the opening coil is set separately.

[0006] 3. Set up a permanent magnetic operating mechanism and control the action of the permanent magnetic operating mechanism through the controller to realize closing and opening operations.

[0007] The vacuum contactors using the above structures 1 and 2 are relatively large in size and have poor layout stability; the vacuum contactors using the above structure 3 require a control circuit board to be provided, which causes electromagnetic compatibility issues.

[0008] It can be seen that the existing technology still needs to be improved and enhanced. Summary of the invention

[0009] In view of the above-mentioned deficiencies in the prior art, the purpose of the present application is to provide a vacuum contactor, aiming to improve the transmission stability of the vacuum contactor.

[0010] In order to achieve the above objectives, this application adopts the following technical solutions:

[0011] On one hand, the present application discloses a vacuum contactor, comprising:

[0012] The closing mechanism comprises a closing holding assembly and a closing holding spring assembly, wherein the closing holding spring assembly is inserted into the closing holding assembly and is in transmission connection with the closing holding assembly;

[0013] The opening mechanism comprises a manual opening switch, an opening coil and an opening transmission assembly, wherein the manual opening switch is connected to the opening coil, the opening coil is arranged between the manual opening switch and the opening transmission assembly, and the end of the opening transmission assembly away from the opening coil is connected to the closing holding assembly.

[0014] In some embodiments of the present application, the moving direction of the opening transmission assembly is the same as the axial direction of the manual opening switch and the opening coil.

[0015] In some embodiments of the present application, the closing holding assembly includes two closing holding members arranged opposite to each other, the two closing holding members are spaced apart and connected to an end of the opening transmission assembly away from the opening coil by rivets;

[0016] One end of the closing holding spring assembly is inserted between the two closing holding members and is located above the opening transmission assembly.

[0017] In some embodiments of the present application, the closing retainer is a sheet metal part.

[0018] In some embodiments of the present application, a gap is left between the opening coil and the opening transmission assembly.

[0019] In some embodiments of the present application, the vacuum contactor further includes a box body, and the closing mechanism and the opening mechanism are arranged in the box body.

[0020] In some embodiments of the present application, the box body is provided with a detachable rear panel, and the closing holding assembly is arranged in the box body at a position close to the rear panel.

[0021] In some embodiments of the present application, an inspection port is provided on the rear panel, and an inspection cover is connected to the inspection port.

[0022] In some embodiments of the present application, the closing holding spring assembly includes:

[0023] A connecting shaft, one end of which is connected to the inspection cover plate, and the other end of which extends toward the closing holding assembly;

[0024] A closing spring is sleeved on the connecting shaft, and a first limit piece is provided at one end of the connecting shaft close to the opening transmission assembly, and a diameter of the first limit piece is greater than an inner diameter of the closing holding spring assembly, and both ends of the closing spring are limited between the first limit block and the inner side of the inspection cover, and a second limit piece is also sleeved on the connecting shaft, and the second limit piece is located between the closing holding assembly and the inspection cover, and an outer diameter of the second limit piece is greater than a distance between two sheet metal parts of the closing holding assembly, and an inner diameter of the second limit piece is greater than an outer diameter of the connecting shaft but not greater than an outer diameter of the closing spring.

[0025] In some embodiments of the present application, the closing mechanism also includes a closing holding assembly support plate, the closing holding assembly support plate is arranged at one end of the closing holding assembly away from the opening transmission assembly, and the closing holding assembly support plate is connected to two oppositely arranged mounting ears on the side facing the closing holding assembly, the two mounting ears are arranged at intervals, and the end of the closing holding assembly away from the opening transmission assembly rotates with the mounting ears.

[0026] In some embodiments of the present application, the opening mechanism further includes:

[0027] There are two opening springs, which are arranged opposite to each other on both sides of the opening transmission assembly;

[0028] The vacuum contactor also includes:

[0029] There are two buffers, which are arranged opposite to each other on both sides of the closing mechanism.

[0030] Beneficial effects:

[0031] The present application provides a vacuum contactor, which improves the structural compactness of the opening holding assembly, the opening holding spring assembly and the opening transmission assembly by connecting the closing holding assembly and the opening holding spring assembly together, realizes the integration between the closing holding assembly and the opening transmission assembly, facilitates installation and replacement, and makes the transmission between the closing holding assembly and the opening transmission assembly more efficient and more stable, thereby improving the reliability of closing. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 A schematic structural diagram of an air contactor provided in one embodiment of the present application.

[0033] Figure 2 for Figure 1 Cross-sectional view along the AA direction.

[0034] Figure 3A schematic diagram of the connection between a closing mechanism and an opening transmission assembly provided in one embodiment of the present application.

[0035] Figure 4 A schematic structural diagram of an air contactor provided in another embodiment of the present application (excluding the inspection cover).

[0036] Figure 5 A schematic structural diagram of an air contactor provided in another embodiment of the present application.

[0037] Explanation of the main component symbols: 1. Closing mechanism; 11. Closing holding assembly; 111. Closing holding member; 12. Closing holding spring assembly; 121. Connecting shaft; 122. Closing spring; 123. First limit member; 124. Second limit member; 13. Closing holding assembly support plate; 14. Mounting ear; 2. Opening mechanism; 21. Manual opening switch; 22. Opening coil; 23. Opening transmission assembly; 24. Opening spring; 3. Box; 31. Rear panel; 32. Inspection port; 33. Inspection cover; 4. Buffer. DETAILED DESCRIPTION

[0038] The present application provides a vacuum contactor. To make the purpose, technical solution and effect of the present application clearer and more specific, the present application is further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific examples described here are only used to explain the present application and are not used to limit the present application.

[0039] In the description of the present application, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, and a specific orientation structure and operation, and therefore, cannot be understood as a limitation on the present application. In addition, "first" and "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise specified, "multiple" means two or more.

[0040] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0041] See also Figure 1 and Figure 2 The present application provides a vacuum contactor with a simple structure, which can be used to frequently connect or disconnect AC and DC main circuits and large-capacity control circuits over long distances. The vacuum contactor includes a contact system, an arc extinguishing system, and an operating system; wherein the operating system includes a closing mechanism 1 and an opening mechanism 2, and through the linkage of the closing mechanism 1 and the opening mechanism 2, the closing operation or the opening effect can be achieved quickly and stably. The closing mechanism 1 includes a closing holding component 11 and a closing holding spring component 12. The closing holding spring component 12 is inserted into the closing holding component 11 and is connected to the closing holding component 11 for transmission to realize the closing operation. The closing holding spring component 12 and the closing holding component 11 are highly compact, which can reduce the volume of the vacuum contactor to a certain extent and reduce the product cost. The opening mechanism 2 includes a manual opening switch 21, an opening coil 22 and an opening transmission component 23. The manual opening switch 21 is connected to the opening coil 22. The opening coil 22 is arranged between the manual opening switch 21 and the opening transmission component 23. The end of the opening transmission component 23 away from the opening coil 22 is connected to the closing holding component 11, so that the opening transmission component 23 and the closing holding component 11 are connected as a whole, the transmission is more reliable, and the stability of closing is improved.

[0042] The moving direction of the opening transmission assembly 23 is the same as the axial direction of the manual opening switch 21 and the opening coil 22, which optimizes the arrangement of the manual opening switch 21, the opening coil 22 and the opening transmission assembly 23, not only improving the structural compactness among the three, but also making the power transmission directions among the three to be on the same straight line, making the transmission more direct and more stable, thereby improving the reliability of the vacuum contactor opening.

[0043] The manual opening switch 21 is a button-type manual opening switch 21, and the button portion of the manual opening switch 21 protrudes from the outer surface of the vacuum contactor for easy operation. The central axis of the manual opening switch 21 is connected to the central axis of the opening coil 22. By pressing the manual opening switch 21, the opening coil 22 can be energized, thereby driving the opening transmission assembly 23 to move, realizing the opening operation, and the transmission effect is high.

[0044] like Figure 3 As shown, the closing retaining assembly 11 includes two closing retaining members 111 arranged opposite to each other, the two closing retaining members 111 are spaced apart and connected to the end of the opening transmission assembly 23 away from the opening coil 22 by rivets; the closing retaining members 111 are generally made of metal sheets with a small thickness, and are connected by riveting, so that the closing retaining members 111 are not easy to deform, and have strong fastness and high connection stability, thereby improving the closing reliability of the vacuum contactor.

[0045] One end of the closing holding spring assembly 12 is inserted between the two closing retaining members 111 and is located above the opening transmission assembly 23. The structure is highly compact, which can reduce the volume of the vacuum contactor and improve the applicability of the vacuum contactor; in addition, it can also increase the closing speed, ensure rapid contact, and reduce the generation of arcs.

[0046] Preferably, the closing retainer 111 is made of sheet metal, which has a standardized shape and is light in weight, and can improve the reliability of the vacuum contactor closing. In addition, the sheet metal process saves materials, has a simple processing technology, and can reduce production costs. In addition, the sheet metal process is also suitable for small batch production and for the production of products with various contactor models and specifications.

[0047] like Figure 2 As shown, there is a gap between the opening coil 22 and the opening transmission assembly 23, and the opening coil 22 and the opening transmission assembly 23 are separately arranged, which is convenient for later maintenance and repair, and can more intuitively judge the problems of the opening coil 22 or the opening transmission assembly 23 without affecting the opening stability of the vacuum contactor.

[0048] like Figure 2 As shown, the vacuum contactor also includes a box body 3, which is formed by assembling a plurality of panels, and a storage space is formed in the box body 3. 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 protective role and isolation and protection role for the closing mechanism 1 and the opening mechanism 2, thereby improving the integrity and neatness of the vacuum contactor. In the preferred embodiment, the box body 3 is made of insulating material, which can improve the safety of the vacuum contactor.

[0049] Furthermore, the box body 3 is provided with a detachable rear panel 31, and the closing holding assembly 11 is arranged in the box body 3 near the rear panel 31, so as to facilitate the maintenance of the closing holding assembly 11. Specifically, the rear panel 31 can be connected to the side panel, bottom panel or panel of the box body 3 by snap connection or screw connection, which is convenient for disassembly and has good connection stability.

[0050] like Figure 4 and Figure 5As shown, an inspection port 32 is provided on the rear panel 31, through which the components located near the inspection port 32 can be inspected in a small range, such as the closing holding assembly 11, the closing holding spring assembly 12, etc. The inspection port 32 is covered with an inspection cover 33, which can reduce the exposed area of ​​the internal parts of the box body 3 and reduce the possibility of pollutants entering the box body 3. In addition, the inspection cover 33 also has the function of fixing and limiting the closing holding spring assembly 12.

[0051] like Figure 2 and Figure 3 As shown, the closing holding spring assembly 12 includes a connecting shaft 121 and a closing spring 122; one end of the connecting shaft 121 is connected to the inspection cover 33, and the other end extends toward the closing holding assembly 11; the closing spring 122 is sleeved on the connecting shaft 121, and a first stopper 123 is provided at one end of the connecting shaft 121 close to the opening transmission assembly 23, the diameter of the first stopper 123 is greater than the inner diameter of the closing holding spring assembly 12, and both ends of the closing spring 122 are limited between the first stopper 123 and the inner side of the inspection cover 33, so that the closing spring 122 can be constrained by the first stopper 123 and the inspection cover 33 when releasing the elastic potential energy. The first stopper 123 is in a circular ring shape, so that the closing spring 122 can be evenly stressed when in contact with it, thereby improving the stability of the closing spring 122 when releasing the elastic potential energy. A limiting nut is also provided on the side of the connecting shaft 121 away from the inspection cover 33. The limiting nut is provided on the side of the first limiting member 123 facing away from the closing spring 122, and can limit the first limiting member 123 so that the first limiting member 123 will not be separated from the connecting shaft 121. A second limiting member 124 is also sleeved on the connecting shaft 121. The second limiting member 124 is located between the closing holding assembly 11 and the inspection cover 33, and the outer diameter of the second limiting member 124 is greater than the distance between the two sheet metal parts of the closing holding assembly 11, and the inner diameter of the second limiting member 124 is greater than the outer diameter of the connecting shaft 121 but not greater than the outer diameter of the closing spring 122. In this way, when the closing holding assembly 11 is opened, it can drive the second limiting member 124 to compress the closing spring 122, and the closing spring 122 stores elastic potential energy. Specifically, the second limiting block is in a circular ring shape, so that the closing spring 122 compressed by the second limiting block can be evenly stressed, thereby ensuring the stability of its closing effect.

[0052] like Figure 3As shown, the closing mechanism 1 also includes a closing holding component support plate 13, which is arranged at one end of the closing holding component 11 away from the opening transmission component 23, and the closing holding component support plate 13 is connected to two oppositely arranged mounting ears 14 on the side facing the closing holding component 11, and two spaced and oppositely arranged through grooves are arranged on the closing holding component support plate 13, and the two mounting ears 14 are respectively inserted into the two through grooves and arranged at intervals; one end of the closing holding component 11 away from the opening transmission component 23 is arranged between the two mounting ears 14, and is rotatably connected to the mounting ears 14, and the contact area between the mounting ears 14 and the closing holding component 11 is large, which can produce a certain stabilizing effect on the closing holding component 11, so that the closing holding component 11 can stably realize closing and opening operations under the drive of the opening transmission component 23.

[0053] In order to further improve the connection accuracy between the mounting ear 14 and the closing holding assembly 11, the mounting ear 14 and the closing holding assembly 11 are connected by rivets to improve the connection strength and connection stability between the two, thereby improving the reliability of the air contactor closing.

[0054] like Figure 2 , Figure 4 and Figure 5 As shown, the opening mechanism 2 is further provided with two opening springs 24, which are respectively arranged on both sides of the opening transmission assembly 23, so that both sides of the opening transmission assembly can be evenly stressed, thereby stably achieving the opening operation.

[0055] The vacuum contactor also includes a buffer 4, which is an oil pressure buffer 4, and there are two oil pressure buffers, and the two buffers 4 are respectively arranged on both sides of the closing mechanism 1. The buffer 4 can reduce the vibration generated when the vacuum contactor is opened, and can improve the stability of the opening while achieving rapid opening, optimize the opening effect, and thus increase the service life of the vacuum contactor. The buffer 4 is fixed in the mounting block, and is screwed to the box body 3 through the mounting block, which is convenient for disassembly and assembly; and the installation position of the buffer 4 is close to the rear panel 31 of the box body 3, which is convenient for later inspection and maintenance. The two buffers 4 are respectively arranged relative to the two opening springs 24, and the axial direction of the buffer 4 is parallel to the axial direction of the opening spring 24, so that the buffer 4 can more effectively absorb the vibration generated when the opening spring 24 is opened, thereby achieving a fast and smooth opening operation.

[0056] Furthermore, observation windows are provided on the rear panel 31 of the box body 3 at positions corresponding to the two buffers 4, through which the working status of the buffers 4 can be intuitively seen, which is convenient for daily monitoring and inspection and maintenance by the staff.

[0057] In summary, the present application improves the compactness of the vacuum contactor structure and optimizes the transmission stability and closing speed of the vacuum contactor by connecting the closing holding component 11 and the opening transmission component 23 together, and inserting the opening holding spring 122 component into the closing holding component 11; in addition, by arranging the manual opening switch 21, the opening coil 22 and the opening transmission component 23 in the same line, the transmission between the manual opening switch 21, the opening coil 22 and the opening transmission component 23 is more direct, thereby improving the opening reliability of the vacuum contactor and further improving the structural compactness of the vacuum contactor, thereby reducing the volume of the vacuum contactor, reducing product costs, and improving the applicability of the vacuum contactor.

[0058] In addition, the closing holding assembly 11 is made of two sheet metal parts and is riveted to the opening transmission assembly 23, which improves the connection accuracy between the closing holding assembly 11 and the opening transmission assembly 23, thereby improving the reliability of closing.

[0059] By providing two buffers 4 arranged opposite to the opening coil 22, the vibration generated by the opening of the vacuum contactor is reduced, the opening stability is improved, the opening effect is optimized, and the service life of the vacuum contactor is extended.

[0060] It is understandable that those skilled in the art can make equivalent substitutions or changes based on the technical solution and application concept of the present application, and all these changes or substitutions should fall within the protection scope of the claims attached to the present application.

Claims

1. A vacuum contactor, characterized in that: include: The closing mechanism comprises a closing holding assembly and a closing holding spring assembly, wherein the closing holding spring assembly is inserted into the closing holding assembly and is in transmission connection with the closing holding assembly; The opening mechanism comprises a manual opening switch, an opening coil and an opening transmission assembly, wherein the manual opening switch is connected to the opening coil, the opening coil is arranged between the manual opening switch and the opening transmission assembly, and the end of the opening transmission assembly away from the opening coil is connected to the closing holding assembly.

2. The vacuum contactor according to claim 1, characterized in that: The moving direction of the opening transmission assembly is the same as the axial direction of the manual opening switch and the opening coil.

3. The vacuum contactor according to claim 1, characterized in that: The closing holding assembly comprises two closing holding members arranged opposite to each other, the two closing holding members are spaced apart and connected to an end of the opening transmission assembly away from the opening coil by rivets; One end of the closing holding spring assembly is inserted between the two closing holding members and is located above the opening transmission assembly.

4. The vacuum contactor according to claim 3, characterized in that: The closing retaining member is a sheet metal member.

5. The vacuum contactor according to claim 1, characterized in that: A gap is left between the opening coil and the opening transmission assembly.

6. The vacuum contactor according to claim 1, characterized in that: It also includes a box body, and the closing mechanism and the opening mechanism are arranged in the box body.

7. The vacuum contactor according to claim 6, characterized in that: The box body is provided with a detachable rear panel, and the closing holding assembly is arranged in the box body at a position close to the rear panel.

8. The vacuum contactor according to claim 7, characterized in that: The rear panel is provided with an inspection opening, and the inspection opening is covered with an inspection cover.

9. The vacuum contactor according to claim 8, characterized in that: The closing holding spring assembly comprises: A connecting shaft, one end of which is connected to the inspection cover plate, and the other end of which extends toward the closing holding assembly; A closing spring is sleeved on the connecting shaft, and a first limit piece is provided at one end of the connecting shaft close to the opening transmission assembly, and a diameter of the first limit piece is greater than an inner diameter of the closing holding spring assembly, and both ends of the closing spring are limited between the first limit block and the inner side of the inspection cover, and a second limit piece is also sleeved on the connecting shaft, and the second limit piece is located between the closing holding assembly and the inspection cover, and an outer diameter of the second limit piece is greater than a distance between two sheet metal parts of the closing holding assembly, and an inner diameter of the second limit piece is greater than an outer diameter of the connecting shaft but not greater than an outer diameter of the closing spring.

10. The vacuum contactor according to claim 6, characterized in that: The closing mechanism also includes: A support plate for the closing holding assembly is arranged at one end of the closing holding assembly away from the opening transmission assembly, and the side of the closing holding assembly support plate facing the closing holding assembly is connected to two oppositely arranged mounting ears, the two mounting ears are arranged at intervals, and one end of the closing holding assembly away from the opening transmission assembly is rotatably connected to the mounting ears.

11. The vacuum contactor according to claim 6, characterized in that: The opening mechanism further comprises: There are two opening springs, which are arranged opposite to each other on both sides of the opening transmission assembly; The vacuum contactor also includes: The buffer is configured with two, and the two buffers are respectively arranged on two sides of the closing mechanism opposite to each other.

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