Contact seat of vacuum arc-extinguishing chamber

Abstract

The utility model relates to the technical field of vacuum switch tube accessories, in particular to a vacuum arc extinguish chamber contact seat which comprises a contact seat shell, an installation cavity is formed in the contact seat shell, a contact opening is formed in one end of the contact seat shell, an installation opening is formed in the other end of the contact seat shell, and a conducting rod is clamped in the installation opening. An installation mechanism used for facilitating rapid assembly and disassembly of the conducting rod and the contact structure is arranged in the installation opening. When the conductive block at the top end of the conductive rod is inserted into the mounting groove, the side wall of the conductive block and the contact surface of the clamping mechanism have a mutual sliding trend, and when the top end of the conductive block is in contact with the conductive sheet, the clamping mechanism clamps the conductive block in the mounting groove, so that clamping mounting of the conductive rod and the contact structure is realized, and the operation is simple and convenient; the quick assembly of the conducting rod and the contact structure is facilitated, and the production efficiency of the vacuum switch tube is improved.

Description

Technical Field

[0001] This application relates to the technical field of vacuum switch tube fittings, and particularly to a contact seat of a vacuum interrupter. Background Art

[0002] The function of the contact structure is mainly to form a transverse magnetic field or a longitudinal magnetic field between the contacts when the vacuum interrupter breaks a short-circuit current, thereby restricting the formation of anode spots on the contact surface and improving the breaking capacity of the interrupter. The contact seat is arranged outside the contact, and a plurality of inclined grooves are opened on the outside of the contact seat. There are mainly two ways for the contact structure to form the required magnetic field: one is to form the required magnetic field by changing the current direction; the other is to set magnetic materials to gather magnetic lines of force to form the magnetic field in the required direction. The vacuum arc is maintained by continuously generating metal vapor from the electrodes. Therefore, to extinguish the vacuum arc, the arc current must be reduced to a certain extent so that it is not sufficient to maintain the arc before it is possible to extinguish it;

[0003] Referring to the Chinese patent application with the publication number CN215815647U, a vacuum switch tube with an internal shield is disclosed. The upper end of the insulating shell has a moving end cover and the lower end has a static end cover. A bellows is installed on the inner wall of the moving end cover. A moving conductive rod and a static conductive rod are respectively arranged at the axial center positions of the moving end cover and the static end cover. A moving contact and a static contact are respectively fixedly arranged at the inner ends of the moving conductive rod and the static conductive rod. A shield is installed inside the insulating shell at the positions of the moving contact and the static contact;

[0004] However, in the prior art, since the conductive rod and the contact structure are usually connected by threads, and when using the threaded connection method, it is more troublesome to operate during the assembly of the assembly line type in batches, the assembly is slower, and the production efficiency of the vacuum switch tube is affected. Therefore, we have designed a contact seat of a vacuum interrupter. Summary of the Utility Model

[0005] The contact seat of a vacuum interrupter provided by the embodiment of this application can solve the technical problem of realizing the clamping installation of the conductive rod and the contact structure, with simple and convenient operation, facilitating the rapid assembly of the conductive rod and the contact structure, and improving the production efficiency of the vacuum switch tube.

[0006] The embodiment of this application provides a contact seat of a vacuum interrupter, which includes a contact seat housing. An installation cavity is arranged inside the contact seat housing. One end of the contact seat housing is provided with a contact opening, and the other end is provided with an installation opening. A conductive rod is clamped in the installation opening, and an installation mechanism for facilitating the rapid assembly and disassembly of the conductive rod and the contact structure is arranged in the installation opening;

[0007] When the conductive block at the top of the conductive rod is inserted into the installation groove, there is a tendency for the side wall of the conductive block to slide relative to the contact surface of the clamping mechanism. When the top of the conductive block contacts the conductive sheet, the clamping mechanism clamps the conductive block in the installation groove, realizing the clamping installation of the conductive rod and the contact structure. Continuing to push the conductive rod, the conductive block squeezes the conductive sheet and moves upward. When the conductive block squeezes the conductive sheet to reach the critical value of the elastic force of the conductive spring, the force applied to the conductive rod is stopped. Under the action of the elastic force of the conductive spring, the clamping mechanism drives the sliding block to move upward. When the sliding block contacts the conductive block, since the conductive block and the sliding block are arranged facing each other and there is no longer a gap convenient for the clamping mechanism to clamp between the sliding block and the conductive block, the clamping mechanism is disengaged from the conductive block at this time.

[0008] In the technical solution described above in the embodiments of the present application, at least the following technical effects are achieved:

[0009] 1. In the present application, by providing an installation groove on the contact seat, since the conductive block is frustum-shaped and there is a clamping mechanism in the contact seat, the contact surfaces of the clamping mechanism and the conductive block are mutually fitted and are smooth. When assembling the contact structure and the conductive rod, when the conductive block at the top of the conductive rod is inserted into the installation groove, there is a tendency for the side wall of the conductive block to slide relative to the contact surface of the clamping mechanism. When the top of the conductive block contacts the conductive sheet, the clamping mechanism clamps the conductive block in the installation groove, realizing the clamping installation of the conductive rod and the contact structure. The operation is simple and convenient, facilitating the rapid assembly of the conductive rod and the contact structure, and improving the production efficiency of the vacuum switch tube.

[0010] 2. In the present application, when it is necessary to repair and replace the internal fittings of the vacuum switch tube, by continuing to push the conductive rod, the conductive block squeezes the conductive sheet and moves upward. When the conductive block squeezes the conductive sheet to reach the critical value of the elastic force of the conductive spring, the force applied to the conductive rod is stopped. Under the action of the elastic force of the conductive spring, the clamping mechanism drives the sliding block to move upward. When the sliding block contacts the conductive block, since the conductive block and the sliding block are arranged facing each other and there is no longer a gap convenient for the clamping mechanism to clamp between the sliding block and the conductive block, the clamping mechanism is disengaged from the conductive block at this time, facilitating the repair and replacement of the fittings.

[0011] In some embodiments, a set of installation grooves are oppositely provided on the installation opening.

[0012] In some embodiments, a connecting column is coaxially and fixedly connected to one end of the conductive rod close to the installation cavity. One end of the connecting column away from the conductive rod is coaxially and fixedly connected to a conductive block, and the conductive block is frustum-shaped.

[0013] In some embodiments, the installation mechanism includes:

[0014] A set of card - setting components, and a set of the card - setting components are respectively arranged in a set of installation grooves. The card - setting components are used for fixedly clamping a conductive rod.

[0015] A sliding block, the sliding block is arranged in a frustum shape, the sliding block has the same shape as and is oppositely arranged with the conductive block, and the sliding block is slidably connected with the connecting column.

[0016] In some embodiments, the card - setting components include:

[0017] A telescopic rod, the telescopic rod is arranged in the installation groove, one end of the telescopic rod is fixedly connected with the inner wall of the installation groove, and the other end is fixedly connected with a clamping block.

[0018] A spring, the spring is coaxially sleeved outside the telescopic rod, one end of the spring is fixedly connected with the inner wall of the installation groove, and the other end is fixedly connected with the clamping block.

[0019] In some embodiments, the contact surface of the clamping block is in close contact with and is smoothly arranged with the contact surfaces of the conductive block and the sliding block.

[0020] In some embodiments, a plurality of inclined through - holes are formed on the outer side wall of the contact - head seat housing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following - described drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0022] Figure 1 It is a schematic diagram of the installation structure of a vacuum interrupter contact - head seat and a conductive rod provided by an embodiment of the present application;

[0023] Figure 2 For Figure 1 the isometric view;

[0024] Figure 3 It is the front view of a vacuum interrupter contact - head seat provided by an embodiment of the present application;

[0025] Figure 4 For Figure 3 the cross - sectional view along the A - A direction;

[0026] Figure 5 It is the structural schematic diagram of a vacuum interrupter contact - head seat provided by an embodiment of the present application;

[0027] Figure 6 It is the front view of a vacuum interrupter contact - head seat provided by an embodiment of the present application;

[0028] Figure 7 is Figure 6 A sectional view along the B-B direction.

[0029] Among them, the reference numerals in the figure are as follows:

[0030] 1. Contact seat housing; 2. Installation cavity; 3. Contact opening; 4. Oblique through hole; 5. Installation port; 6. Installation groove; 7. Telescopic rod; 8. Clamping block; 9. Spring; 10. Conductive rod; 11. Connecting column; 12. Conductive block; 13. Sliding block. Specific embodiments

[0031] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application clearer, the following further elaborates on this application in combination with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not used to limit this application.

[0032] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and do not limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above accompanying drawing descriptions are intended to cover non-exclusive inclusion.

[0033] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0034] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to this application.

[0035] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of this application, "a plurality" means two or more, unless otherwise specifically defined.

[0036] In this application, "and / or" is merely a correlative relationship describing associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this text generally indicates that the associated objects before and after are in an "or" relationship.

[0037] It should be noted that in this application, words such as "in this embodiment", "exemplarily", and "for example" are used to give examples, illustrations, or explanations. Any embodiment or design solution described as "in this embodiment", "exemplarily", or "for example" in this application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Precisely, the use of words such as "in this embodiment", "exemplarily", and "for example" aims to present relevant concepts in a specific manner, meaning that the specific features, structures, or characteristics described in combination with the embodiment can be included in at least one embodiment of this application. The appearance of the above words at various positions in the specification does not necessarily refer to the same embodiment, nor are they independent or alternative embodiments mutually exclusive with other embodiments. Those skilled in the art explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0038] The contact holder is an external mounting part of the contact. Multiple inclined slots are provided on the outer side of the contact holder. The contact holder and the contact form the contact structure of the vacuum switch tube. Its main function is to form a transverse magnetic field or a longitudinal magnetic field between the contacts when the vacuum interrupter interrupts the short-circuit current, thereby restricting the formation of anode spots on the contact surface and improving the breaking capacity of the interrupter. There are mainly two ways for the contact structure to form the required magnetic field: one is to form the required magnetic field by changing the current direction; the other is to set magnetic materials to gather magnetic lines of force to form the magnetic field in the required direction.

[0039] In a kind of shielded built-in vacuum switch tube in the related art, the upper end of the insulating shell has a moving end cover and the lower end has a static end cover. A bellows is installed on the inner wall of the moving end cover. A moving conductive rod and a static conductive rod are respectively provided at the axial center positions of the moving end cover and the static end cover. Moving contacts and static contacts are respectively fixedly arranged at the inner ends of the moving conductive rod and the static conductive rod. A shield is installed inside the insulating shell at the positions of the moving contact and the static contact.

[0040] Based on this, to improve the problem in the related art that since the conductive rod and the contact structure usually adopt a threaded connection, and when using the threaded connection method, it is more troublesome to operate during pipeline-type batch assembly, the assembly is slower, and the production efficiency of the vacuum switch tube is affected, the embodiments of this application provide the following solutions.

[0041] Please refer to Figures 1 to 6, A contact seat of a vacuum interrupter includes a contact seat housing 1. An installation cavity 2 is provided inside the contact seat housing 1. One end of the contact seat housing 1 is provided with a contact opening 3, and the other end is provided with an installation opening 5. A conductive rod 10 is clamped in the installation opening 5. An installation mechanism is provided in the installation opening 5, and the installation mechanism is used to facilitate the quick assembly and disassembly of the conductive rod 10 and the contact structure;

[0042] The installation mechanism includes a set of clamping components and a sliding block 13. A set of installation grooves 6 are oppositely provided on the installation opening 5. A set of clamping components are respectively arranged in the set of installation grooves 6. The clamping components are used to fixedly clamp the conductive rod 10. The sliding block 13 is arranged in a frustum shape. The sliding block 13 has the same shape as and is oppositely arranged with the conductive block 12, and the sliding block 13 is slidably connected to the connecting column 11;

[0043] The effect of such a setting is that when the conductive block 12 at the top of the conductive rod 10 is inserted into the installation groove 6, there is a tendency of mutual sliding between the side wall of the conductive block 12 and the contact surface of the clamping mechanism. When the top of the conductive block 12 contacts the conductive sheet, the clamping mechanism clamps the conductive block 12 in the installation groove 6, realizing the clamping installation of the conductive rod 10 and the contact structure;

[0044] By continuously pushing the conductive rod 10, the conductive block 12 squeezes the conductive sheet and continues to move upward, so that the clamping mechanism contacts the frustum-shaped sliding block 13. When pushing the conductive rod 10 stops, under the action of the elastic force of the spring 9, the clamping mechanism drives the sliding block 13 to move upward. When the sliding block 13 contacts the conductive block 12, since the conductive block 12 and the sliding block 13 are arranged oppositely, and there is no longer a gap convenient for the clamping mechanism to clamp between the sliding block 13 and the conductive block 12, at this time the clamping mechanism is separated from the conductive block 12, realizing the separation of the conductive rod 10 and the contact structure.

[0045] Please refer to Figure 4 and Figure 7 , One end of the conductive rod 10 close to the installation cavity 2 is coaxially and fixedly connected with a connecting column 11. One end of the connecting column 11 away from the conductive rod 10 is coaxially and fixedly connected with a conductive block 12. The conductive block 12 is arranged in a frustum shape;

[0046] The effect of such a setting is that the conductive block 12 is arranged in a frustum shape, and a clamping mechanism is provided in the installation opening 5 of the contact seat housing 1. The contact surfaces of the clamping mechanism and the conductive block 12 are mutually attached and are smooth. When assembling the contact structure and the conductive rod 10, when the conductive block 12 at the top of the conductive rod 10 is inserted into the installation groove 6, there is a tendency of mutual sliding between the side wall of the conductive block 12 and the contact surface of the clamping mechanism.

[0047] Please refer to Figure 4 and Figure 7, the clamping component includes a telescopic rod 7 and a spring 9. The telescopic rod 7 is arranged in the installation groove 6. One end of the telescopic rod 7 is fixedly connected to the inner wall of the installation groove 6, and the other end is fixedly connected with a clamping block 8. The spring 9 is coaxially sleeved outside the telescopic rod 7. One end of the spring 9 is fixedly connected to the inner wall of the installation groove 6, and the other end is fixedly connected with the clamping block 8. The clamping block 8 is in contact with the contact surfaces of the conductive block 12 and the sliding block 13 and is smoothly arranged;

[0048] The effect of such a setting is that when the pushing of the conductive rod 10 stops, under the action of the elastic force of the spring 9, the clamping mechanism drives the sliding block 13 to move upward. When the sliding block 13 contacts the conductive block 12, since the conductive block 12 and the sliding block 13 are arranged facing each other, and there is no longer a gap convenient for the clamping mechanism to clamp between the sliding block 13 and the conductive block 12, at this time, the clamping mechanism is disengaged from the conductive block 12.

[0049] Please refer to Figure 2 and Figure 6 , a plurality of inclined through holes 4 are formed on the outer side wall of the contact head seat housing 1;

[0050] The effect of such a setting is that by providing a number of inclined through holes 4 on the side wall of the contact head seat housing 1, the contact area is larger, the contact head seat with the inclined through holes 4 has strong breaking ability and good arc extinguishing effect. When the vacuum interrupter breaks the short-circuit current, a transverse magnetic field or a longitudinal magnetic field is formed between the contacts, thereby restricting the formation of anode spots on the contact surface and improving the breaking ability of the interrupter.

[0051] As can be seen from the above, the working principle of this application is as follows:

[0052] When assembling the contact structure and the conductive rod 10, when the conductive block 12 at the top of the conductive rod 10 is inserted into the installation groove 6, there is a tendency of relative sliding between the side wall of the conductive block 12 and the contact surface of the clamping mechanism. When the top of the conductive block 12 contacts the conductive sheet, the clamping mechanism clamps the conductive block 12 in the installation cavity 2;

[0053] When it is necessary to repair and replace the fittings inside the vacuum switch tube, by continuously pushing the conductive rod 10, the conductive block 12 squeezes the conductive sheet and continues to move upward, so that the clamping mechanism contacts the frustum-shaped sliding block 13. When the conductive block 12 squeezes the conductive sheet to reach the critical value of the elastic force of the spring 9, the force applied to the conductive rod 10 is stopped. At this time, under the action of the elastic force of the spring 9, the clamping mechanism drives the sliding block 13 to move upward. When the sliding block 13 contacts the conductive block 12, since the conductive block 12 and the sliding block 13 are arranged facing each other, and there is no longer a gap convenient for the clamping mechanism to clamp between the sliding block 13 and the conductive block 12, at this time, the clamping mechanism is disengaged from the conductive block 12.

[0054] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included within the protection scope of the present application.

Claims

1. A vacuum interrupter contact base, comprising a contact base housing (1), characterized in that: The contact base housing (1) is provided with a mounting cavity (2), one end of the contact base housing (1) is provided with a contact opening (3), and the other end is provided with a mounting opening (5), a conductive rod (10) is clamped in the mounting opening (5), and a mounting mechanism for facilitating rapid assembly and disassembly of the conductive rod (10) and the contact structure is provided in the mounting opening (5).

2. A vacuum interrupter contact seat according to claim 1, characterized in that: A group of installation grooves (6) are oppositely formed on the installation opening (5).

3. A vacuum interrupter contact seat according to claim 2, characterized in that: One end of the conductive rod (10) close to the installation cavity (2) is coaxially fixedly connected to a connecting column (11), and one end of the connecting column (11) away from the conductive rod (10) is coaxially fixedly connected to a conductive block (12).

4. A vacuum interrupter contact seat according to claim 3, characterized in that: The mounting mechanism comprises: A group of clamping components, each of which is disposed in a group of mounting grooves (6), and is used to fix and clamp the conductive rod (10); A sliding block (13), the sliding block (13) and the conductive block (12) are of the same shape and are arranged opposite to each other, and the sliding block (13) is slidably connected to the connecting column (11).

5. A vacuum interrupter contact seat according to claim 4, characterized in that: The card assembly comprises: A telescopic rod (7), wherein the telescopic rod (7) is arranged in the mounting groove (6), one end of the telescopic rod (7) is fixedly connected to the inner wall of the mounting groove (6), and the other end of the telescopic rod (7) is fixedly connected to a clamping block (8); A spring (9), wherein the spring (9) is coaxially sleeved on the outside of the telescopic rod (7), one end of the spring (9) is fixedly connected to the inner wall of the mounting groove (6), and the other end is fixedly connected to the clamping block (8).

6. A vacuum interrupter contact seat according to claim 5, characterized in that: The clamping block (8) is in contact with the contact surfaces of the conductive block (12) and the sliding block (13) and is arranged to be smooth.

7. A vacuum interrupter contact seat according to claim 1, characterized in that: A plurality of oblique through holes (4) are provided on the outer side wall of the contact seat housing (1).

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