Direct-acting three-position switch
By adopting a sliding guide bar and a chute structure in the direct-acting three-station switch, the problems of complex processing and high cost caused by the arrangement of multiple anti-rotation screws in the prior art are solved, and a larger stopping and guiding action range and lower cost effect are achieved.
Patent Information
- Application Number
- CN202421720784.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-19
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-19
AI Technical Summary
When the existing direct-acting three-station switch provides stop and guide functions within the moving range of the moving conductor, it is necessary to intensively arrange multiple anti-rotation screws, resulting in complex processing and high cost.
Using a sliding guide bar and a sliding groove structure, the insulated screw drives the sliding guide bar to slide in the sliding groove, increasing the stop rotation and guiding range of the moving conductor, avoiding the setting of multiple anti-rotation screws.
It effectively increases the range of stop rotation and guiding effects of the moving conductor, simplifies the structure, reduces production and use costs, and avoids intensive hole opening operations.
Smart Images
Figure CN222851313U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of high-voltage switch equipment, in particular to a direct-acting three-position switch. Background Art
[0002] Three-position disconnectors are divided into knife-type and direct-acting types. Direct-acting three-position disconnectors have small structure, good electric field, labor-saving operation, and large current carrying capacity, and are widely used in high-current gas-insulated switchgear.
[0003] The direct-acting switch in the prior art generally includes a grounding contact, an intermediate contact, a closing contact, a moving conductor and an insulating screw. Specifically, the insulating screw passes through the grounding contact and the intermediate contact and is threadedly connected to the moving conductor. A lead screw thread structure is formed between the insulating screw and the moving conductor. When the insulating screw rotates, it can drive the moving conductor to move and switch between the grounding closing position, the isolation opening position and the isolation closing position. The direct-acting three-position switch in the prior art limits the rotation of the moving conductor by setting an anti-rotation screw between the moving conductor and the intermediate contact, and provides a sliding guide for the moving conductor. However, the moving conductor is partially moved outside the intermediate contact in the grounding closing position and the isolation closing position, and a single anti-rotation screw cannot take into account a larger anti-rotation and guiding action range. If it is guaranteed that the anti-rotation action is provided within a longer moving range of the moving contact, multiple anti-rotation screws need to be densely arranged, which also requires the corresponding opening of multiple bolt holes and other operations, which is complicated to process and has a high cost. Utility Model Content
[0004] The purpose of the utility model is to provide a direct-acting three-position switch. The setting of the sliding guide strip can effectively increase the range of the anti-rotation and guiding effect on the moving conductor, avoids the setting of multiple anti-rotation screws in the prior art, and also avoids operations such as dense opening of holes on the middle contact. It has a simple structure, strong practicality, low processing difficulty, and effectively reduces the production and use costs.
[0005] To achieve this purpose, the utility model adopts the following technical solutions:
[0006] A direct-acting three-position switch comprises a grounding contact, an intermediate contact, a closing contact, a moving conductor and an insulating screw;
[0007] The grounding contact, the intermediate contact and the closing contact are arranged in sequence and coaxially, the insulating screw passes through the grounding contact and the intermediate contact and is threadedly connected with the moving conductor, one of the intermediate contact and the moving conductor is provided with a sliding guide strip, and the other is correspondingly provided with a sliding groove ；
[0008] The insulating screw is used to drive the sliding guide bar to slide in the slide groove, so that the first side and the second side of the moving conductor respectively abut the grounding contact and the intermediate contact, or the first side and the second side of the moving conductor respectively abut the intermediate contact and the closing contact, or the first side and the second side of the moving conductor both abut the intermediate contact.
[0009] Optionally, the slide groove is arranged on the moving conductor, the intermediate contact includes a first cylindrical shell, a fixing hole is arranged on the inner wall of the first cylindrical shell, a fixing head is correspondingly arranged on the sliding guide strip, and the fixing head is fixedly inserted in the fixing hole.
[0010] Optionally, the closing contact includes a second cylindrical shell and a second conductor arranged on the inner side of the first end of the second cylindrical shell, the second conductor is arranged close to the middle contact, the second conductor abuts against the moving conductor, and the second end of the second cylindrical shell is provided with a plurality of heat dissipation holes spaced apart along its circumference.
[0011] Optionally, a bridging conductor is provided at the second end portion of the second cylindrical shell, a busbar bridging hole communicating with the interior of the second cylindrical shell is opened on the bridging conductor, and the heat dissipation hole is provided on the second cylindrical shell between the bridging conductor and the second conductor.
[0012] Optionally, the intermediate contact comprises a first cylindrical shell and first conductors disposed on two axially opposite sides of the first cylindrical shell, the closing contact comprises a second cylindrical shell and a second conductor disposed in the second cylindrical shell on a side close to the intermediate contact, and the grounding contact comprises a third cylindrical shell and a third conductor disposed in the third cylindrical shell on a side close to the intermediate contact;
[0013] The insulating screw is used to drive the sliding guide bar to slide in the sliding groove, so that the first side and the second side of the moving conductor respectively abut the third conductor and the first conductor, or the first side and the second side of the moving conductor respectively abut the third conductor and the second conductor, or the first side and the second side of the moving conductor both abut the two first conductors.
[0014] Optionally, the first conductor includes a spring contact finger, and the inner wall of the first cylindrical shell is provided with a first embedding groove for embedding the spring contact finger; and / or
[0015] The second conductor comprises a spring contact finger, and the inner wall of the second cylindrical shell is provided with a second embedding groove for embedding the spring contact finger; and / or
[0016] The third conductor includes a spring contact finger, and the inner wall of the third cylindrical shell is provided with a third embedding groove for embedding the spring contact finger.
[0017] Optionally, the side wall of the first shell is provided with a first mounting hole and a through hole which are arranged opposite to each other; wherein,
[0018] The first mounting hole is used for fixed connection with a bolt of the sealed pole;
[0019] The through hole is used for installing the bolt.
[0020] Optionally, outer peripheral walls of the first cylindrical shell and the second cylindrical shell are coated with a heat dissipation coating.
[0021] Optionally, the first side and the second side of the moving conductor are provided with conductive abutment end surfaces along the circumferential direction, and the conductive abutment end surfaces are used to abut with the first conductor, the second conductor or the third conductor. An avoidance groove is provided on the moving conductor between the two conductive abutment end surfaces along the circumferential direction, and the avoidance groove is used to avoid the first conductor, the second conductor or the third conductor.
[0022] Optionally, it also includes a shaft seal, an insulating bracket and an aluminum plate, wherein the insulating bracket is arranged between the shaft seal and the aluminum plate, the insulating bracket is fixedly arranged, the aluminum plate is fixedly connected to the grounding contact, and the end of the insulating screw facing away from the moving conductor is successively passed through the aluminum plate and the insulating bracket and connected to the shaft seal.
[0023] Beneficial effects:
[0024] The utility model provides a direct-acting three-position switch, in which the sliding guide strip can slide in the slide groove when the insulating screw is rotated. During the sliding process, when the moving conductor slides to the first side and the second side thereof and respectively contacts the grounding contact and the middle contact, the direct-acting three-position switch is in a grounding closing state; when the moving conductor slides to the first side and the second side thereof and respectively contacts the middle contact and the closing contact, the direct-acting three-position switch is in an isolation closing state; when the moving conductor slides to the first side and the second side thereof and contacts the middle contact, the direct-acting three-position switch is in an isolation opening state. The setting of the sliding guide strip can effectively increase the range of the anti-rotation and guiding action on the moving conductor, avoids the setting of multiple anti-rotation screws in the prior art, and also avoids operations such as dense hole opening on the middle contact. It has a simple structure, strong practicality, low processing difficulty, and effectively reduces production and use costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0025] Figure 1 It is a structural schematic diagram of the direct-acting three-position switch provided by the utility model;
[0026] Figure 2 It is a structural schematic diagram of the sliding guide strip provided by the utility model;
[0027] Figure 3It is a cross-sectional schematic diagram of the moving conductor provided by the utility model;
[0028] Figure 4 It is a structural schematic diagram of the first cylinder shell provided by the utility model;
[0029] Figure 5 It is a cross-sectional schematic diagram of the first cylinder shell provided by the utility model;
[0030] Figure 6 It is a structural schematic diagram of the second cylinder shell provided by the utility model;
[0031] Figure 7 It is a cross-sectional schematic diagram of the second cylinder shell provided by the utility model;
[0032] Figure 8 It is a structural schematic diagram of the third cylinder shell provided by the utility model;
[0033] Fig. 9 It is a cross-sectional schematic diagram of the third cylinder shell provided by the utility model;
[0034] Fig.10 It is a structural schematic diagram of the spring contact finger provided by the utility model.
[0035] In the figure:
[0036] 1. grounding contact; 101. third inner cavity; 11. third cylindrical shell; 111. third embedded groove; 112. through hole;
[0037] 2. middle contact; 201. first inner cavity; 21. first cylindrical shell; 211. first embedding groove; 212. fixing hole; 213. first mounting hole; 214. through hole; 22. sliding guide strip; 221. fixing head; 2211. elastic clamp arm; 23. mounting platform;
[0038] 3. Closing contact; 301. second inner cavity; 31. second cylindrical shell; 311. second embedded groove; 312. heat dissipation hole; 313. second mounting hole; 32. lap conductor; 321. busbar lap hole;
[0039] 4. Moving conductor; 401. First side; 402. Second side; 403. Conductive abutting end surface; 404. First groove; 405. Second groove; 41. Slide groove; 42. Avoidance groove; 43. Threaded hole;
[0040] 5. Insulation screw;
[0041] 6. Spring contact finger;
[0042] 7. Shaft seal;
[0043] 8. Insulation bracket;
[0044] 9. Aluminum plate. DETAILED DESCRIPTION
[0045] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.
[0046] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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 or an electrical connection; 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 the present invention can be understood according to specific circumstances.
[0047] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.
[0048] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.
[0049] This embodiment provides a direct-acting three-position switch. Figures 1 to 3As shown, the direct-acting three-position switch includes a grounding contact 1, an intermediate contact 2, a closing contact 3, a moving conductor 4 and an insulating screw 5. The grounding contact 1, the intermediate contact 2 and the closing contact 3 are arranged in sequence and spaced apart and coaxially, the insulating screw 5 penetrates the grounding contact 1 and the intermediate contact 2 and is threadedly connected with the moving conductor 4, one of the intermediate contact 2 and the moving conductor 4 is provided with a sliding guide bar 22, and the other is correspondingly provided with a sliding groove 41, and the insulating screw 5 is used to drive the sliding guide bar 22 to slide in the sliding groove 41, so that the first side 401 and the second side 402 of the moving conductor 4 respectively abut against the grounding contact 1 and the intermediate contact 2; or respectively abut against the intermediate contact 2 and the closing contact 3; or both abut against the intermediate contact 2.
[0050] Specifically, in Figure 1 In the figure, the two sides of the moving conductor 4 from bottom to top are respectively the first side 401 and the second side 402 of the moving conductor 4. Figure 3 In the figure, the two sides of the moving conductor 4 from right to left are respectively the first side 401 and the second side 402 of the moving conductor 4.
[0051] Specifically, the insulating screw 5 rotates to drive the sliding guide bar 22 to slide in the slide groove 41, so that the moving conductor 4 moves and switches positions. When the direct-acting three-position switch is in the grounding and closing state, the first side 401 and the second side 402 of the moving conductor 4 abut against the grounding contact 1 and the middle contact 2 respectively; when the direct-acting three-position switch is in the isolation and opening state, the first side 401 and the second side 402 of the moving conductor 4 abut against the middle contact 2; when the direct-acting three-position switch is in the isolation and closing state, the first side 401 and the second side 402 of the moving conductor 4 abut against the middle contact 2 and the closing contact 3 respectively.
[0052] In this embodiment, the setting of the sliding guide strip 22 can effectively increase the range of anti-rotation and guiding action on the moving conductor 4, avoiding the setting of multiple anti-rotation screws in the prior art, and also avoiding operations such as dense opening of holes on the intermediate contact 2. It has a simple structure, strong practicality, low processing difficulty, and effectively reduces production and use costs.
[0053] Specifically, continue to refer to Figures 2 to 9 As shown, the middle contact 2 includes a first cylindrical shell 21 and first conductors arranged on two axially opposite sides of the first cylindrical shell 21, the closing contact 3 includes a second cylindrical shell 31 and a second conductor arranged in the second cylindrical shell 31 on a side close to the middle contact 2, and the grounding contact 1 includes a third cylindrical shell 11 and a third conductor arranged in the third cylindrical shell 11 on a side close to the middle contact 2.
[0054] Exemplarily, the slide groove 41 is arranged on the moving conductor 4, the intermediate contact 2 comprises a first cylindrical shell 21, a fixing hole 212 is arranged on the inner wall of the first cylindrical shell 21, a fixing head 221 is correspondingly arranged on the sliding guide strip 22, and the fixing head 221 is fixedly inserted in the fixing hole 212. Through the plug-in cooperation between the fixing head 221 and the fixing hole 212, the sliding guide strip 22 can be reliably fixed, the structure is simple, the installation is convenient, and the disassembly is also convenient.
[0055] Exemplarily, a plurality of fixing heads 221 are provided in a one-to-one correspondence with the number of fixing holes 212, so as to further ensure the fixing effect of the sliding guide strip 22. In this embodiment, two fixing heads 221 are provided in a one-to-one correspondence with the number of fixing holes 212.
[0056] Exemplarily, the fixing head 221 includes two elastic clamping arms 2211 arranged at intervals. When the fixing head 221 is inserted into the corresponding fixing hole 212, the two elastic clamping arms 2211 can be tightly pressed against the hole wall of the fixing hole 212 under the action of elastic force, which is equivalent to an interference fit effect between the fixing head 221 and the fixing hole 212, thereby realizing reliable fixation of the fixing head 221.
[0057] Exemplarily, a lap conductor 32 is provided at the second end of the second cylindrical shell 31, and a busbar lap hole 321 communicating with the inside of the second cylindrical shell 31 is provided on the lap conductor 32, and a heat dissipation hole 321 is provided on the second cylindrical shell 31 between the lap conductor 32 and the second conductor. Specifically, the busbar lap hole 321 is provided so as to allow an external busbar to be connected. Specifically, the first end of the second cylindrical shell 31 is close to one end of the first cylindrical shell 21. When the three-position direct-acting switch is in the closed state, the contact part between the moving conductor 4 and the second conductor is the main point where heat is generated, and being in this state for a long time will cause the closing contact 3 to overheat. By providing the heat dissipation hole 321 on the second cylindrical shell 31 between the lap conductor 32 and the second conductor, it is possible to correspond to the heat generation point in the second cylindrical shell 31, thereby reliably and effectively dissipating heat for the closing contact 3. In this embodiment, the second cylindrical shell 31 is provided with 12 heat dissipation holes 312 evenly spaced along its circumference.
[0058] Exemplarily, when the direct-acting three-position switch is in the grounding closed state, the two ends of the moving conductor 4 respectively abut the third conductor and the first conductor close to the third cylindrical shell 11, and the first conductor is electrically connected to the third conductor through the moving conductor 4. At this time, the direct-acting three-position switch is in the grounding closed state. When the direct-acting three-position switch is in the isolation open state, the two ends of the moving conductor 4 respectively abut the two first conductors, and the moving conductor 4 is neither electrically connected to the second conductor nor to the third conductor. At this time, the direct-acting three-position switch is in the isolation open state. When the direct-acting three-position switch is in the isolation closed state, the two ends of the moving conductor 4 respectively abut the second conductor and the first conductor close to the second cylindrical shell 31, and the second conductor is electrically connected to the first conductor through the moving conductor 4. At this time, the direct-acting three-position switch is in the isolation closed state.
[0059] Exemplarily, the first conductor, the second conductor and the third conductor all include spring contact fingers 6. The structure of the spring contact fingers 6 is as shown in FIG. Fig.10 When the moving conductor 4 abuts against the spring contact finger 6, electrical conduction between the moving conductor 4 and the spring contact finger 6 can be achieved.
[0060] For example, refer to Figure 3 As shown, a conductive abutment end surface 403 is provided on the circumference of the first side 401 and the second side 402 of the moving conductor 4, and the conductive abutment end surface 403 is used to abut with the first conductor, the second conductor or the third conductor. An avoidance groove 42 is provided on the moving conductor 4 between the two conductive abutment end surfaces 403 along the circumference, and the avoidance groove 42 is used to avoid the first conductor, the second conductor or the third conductor.
[0061] Specifically, when the direct-acting three-position switch is in the grounding and closing state, the two conductive abutting end faces 403 of the moving conductor 4 respectively abut the third conductor and the first conductor close to the third cylindrical shell 11. When the direct-acting three-position switch is in the isolation and opening state, the two conductive abutting end faces 403 of the moving conductor 4 respectively abut the two first conductors. When the direct-acting three-position switch is in the isolation and closing state, the two conductive abutting end faces 403 of the moving conductor 4 respectively abut the second conductor and the first conductor close to the second cylindrical shell 31. Specifically, when the first conductor is set as the spring contact finger 6, the opening of the avoidance groove 42 enables the middle part of the moving conductor 4 to effectively avoid the spring contact finger 6 during the movement process, thereby reducing the sliding friction between the spring contact finger 6 and the spring contact finger 6, and extending the life of the spring contact finger 6.
[0062] Exemplarily, the two conductive abutting end faces 403 are integrally formed with the avoidance groove 42 , that is, the outer peripheral wall of the moving conductor 4 is set as a stepped structure, the concave area in the middle is the avoidance groove 42 , and the higher areas on both sides of the axial direction are the two conductive abutting end faces 403 .
[0063] Exemplarily, the diameters of the two conductive abutting end surfaces 403 are set to be equal and slightly larger than the diameter of the avoidance groove 42 .
[0064] Exemplarily, a first groove 404 is provided at one end of the moving conductor 4 facing the grounding contact 1, a second groove 405 is provided at one end of the moving conductor 4 facing the closing contact 3, and a threaded hole 43 threadably matched with the insulating screw 5 is provided between the first groove 404 and the second groove 405. Specifically, the length of the second groove 405 along the axial direction of the moving conductor 4 is greater than that of the first groove 404, that is, the threaded hole 43 is provided closer to one side of the grounding contact 1.
[0065] Exemplarily, the slide groove 41 is disposed penetrating along the axial direction of the moving conductor 4 .
[0066] For example, refer to Figures 4 to 5 As shown, the third cylindrical shell 11 has a third inner cavity 101, and the third inner cavity 101 is open on one side facing the middle contact 2, and the third conductor is arranged in the third inner cavity 101. When the direct-acting three-position switch is in the grounding and closing state, the moving conductor 4 can partially move into the third inner cavity 101. Specifically, a through hole 112 for the insulating screw 5 to pass through is opened at one end of the third cylindrical shell 11 facing away from the middle contact 2, and the aperture of the through hole 112 is larger than the diameter of the insulating screw 5.
[0067] Specifically, the inner wall of the third cylindrical shell 11 is provided with a third embedding groove 111 for embedding the spring contact finger 6. The inner wall of the third cylindrical shell 11 is the inner cavity wall of the third inner cavity 101. By providing the third embedding groove 111, the spring contact finger 6 can be effectively embedded to achieve the fixation of the spring contact finger 6. Exemplarily, the number of the third embedding grooves 111 is arranged at intervals along the axial direction of the third cylindrical shell 11, and a spring contact finger 6 is embedded in each third embedding groove 111. Such an arrangement can further ensure a reliable electrical conduction effect when the spring contact finger 6 in the third cylindrical shell 11 contacts the moving conductor 4. In this embodiment, the number of the third embedding grooves 111 is arranged at intervals along the axial direction of the third cylindrical shell 11.
[0068] For example, refer to Figure 6 to Figure 7 As shown, the first cylindrical shell 21 has a first inner cavity 201, and the first inner cavity 201 is arranged as a through cavity along its own axial direction, and the first conductor and the sliding guide strip 22 are both arranged in the first inner cavity 201. The insulating screw 5 can pass through the first inner cavity 201. The moving conductor 4 can move in the first inner cavity 201. When the direct-acting three-position switch is in the isolation and opening state, the moving conductor 4 is completely located in the first inner cavity 201.
[0069] Specifically, the inner wall of the first cylindrical shell 21 is provided with a first embedding groove 211 for embedding the spring contact finger 6. The inner wall of the first cylindrical shell 21 is the inner cavity wall of the first inner cavity 201. By providing the first embedding groove 211, the spring contact finger 6 can be effectively embedded to achieve the fixation of the spring contact finger 6. Exemplarily, the first inner cavity 201 is provided with a plurality of first embedding grooves 211 at both ends opposite to each other along its own axial direction, and a spring contact finger 6 is embedded in each first embedding groove 211. Such a setting can further ensure a reliable electrical conduction effect when the spring contact finger 6 in the first cylindrical shell 21 contacts the moving conductor 4. In this embodiment, the first inner cavity 201 is provided with two first embedding grooves 211 at both ends opposite to each other along its own axial direction.
[0070] Further, the side wall of the first cylindrical shell 21 is provided with a first mounting hole 213 and a through hole 214 which are arranged opposite to each other. Specifically, a mounting platform 23 is extended on one side of the first cylindrical shell 21. The first mounting hole 213 is provided on the mounting platform 23. The first mounting hole 213 and the through hole 214 are respectively connected to the first inner cavity 201. Specifically, the first mounting hole 213 is provided for being fixedly connected with the bolts of the sealed pole. The provision of the through hole 214, on the one hand, allows the operator's hands and tools to be inserted into the first inner cavity 201 for bolt installation, and on the other hand, it can also play a role in heat dissipation.
[0071] The lower end surface of the mounting platform 23 is set to be a plane, which can facilitate the first cylinder shell 21 to be set on the outlet seat of the sealed pole.
[0072] For example, refer to Figures 8 to 9 As shown, the second cylindrical shell 31 has a second inner cavity 301, the second inner cavity 301 is open on one side facing the middle contact 2, and the second conductor is arranged in the second inner cavity 301. When the direct-acting three-position switch is in the isolation and closing state, the moving conductor 4 can partially move into the second inner cavity 301.
[0073] Specifically, the inner wall of the second cylindrical shell 31 is provided with a second embedding groove 311 for embedding the spring contact finger 6. The inner wall of the second cylindrical shell 31 is the inner cavity wall of the second inner cavity 301. By providing the second embedding groove 311, the spring contact finger 6 can be effectively embedded to achieve the fixation of the spring contact finger 6. Exemplarily, the number of the second embedding grooves 311 is arranged at intervals along the axial direction of the second cylindrical shell 31, and a spring contact finger 6 is embedded in each second embedding groove 311. Such an arrangement can further ensure a reliable electrical conduction effect when the spring contact finger 6 in the second cylindrical shell 31 contacts the moving conductor 4. In this embodiment, the number of the second embedding grooves 311 is arranged at intervals along the axial direction of the second cylindrical shell 31.
[0074] Furthermore, a second mounting hole 313 is formed at one end of the second cylindrical shell 31 facing away from the first cylindrical shell 21. The second mounting hole 313 is formed to facilitate the fixed connection between the second cylindrical shell 31 and the external fixed structure through bolts and other connecting components.
[0075] Exemplarily, the bridging conductor 32 is integrally formed with the second cylindrical shell 31 .
[0076] Exemplarily, the outer peripheral walls of the first cylindrical shell 21 and the second cylindrical shell 31 are coated with a heat dissipation coating. Specifically, the heat dissipation coating can be a graphene radiation coating, which can transfer the heat on the surface of the first cylindrical shell 21 and the second cylindrical shell 31 to the coating, and transfer it to the outside with high radiation capacity, so as to achieve the effect of efficient heat transfer and temperature reduction.
[0077] In this embodiment, continue to refer to Figure 1 As shown, the direct-acting three-position switch also includes a shaft seal 7, an insulating bracket 8 and an aluminum plate 9. The insulating bracket 8 is arranged between the shaft seal 7 and the aluminum plate 9, and the insulating bracket 8 is fixedly arranged. The aluminum plate 9 is fixedly connected to the grounding contact 1. The end of the insulating screw 5 facing away from the moving conductor 4 is successively penetrated by the aluminum plate 9 and the insulating bracket 8 and connected to the shaft seal 7. Specifically, when the direct-acting three-position switch is installed on the external fixing bracket as a whole, the insulating screw 5 is penetrated by the external fixing bracket and is rotatably connected to the external fixing bracket, and the shaft seal 7 can meet the sealing requirements between the shaft of the insulating screw 5 and the external fixing bracket. The insulating bracket 8 is fixed on the external fixing bracket and is used to connect the shaft seal 7 and the aluminum plate 9.
[0078] For example, a sprocket may be provided at one end of the insulating screw 5 facing away from the moving conductor 4 , and the rotation of the insulating screw 5 may be controlled by a chain transmission mechanism.
[0079] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.
Claims
1. A direct-acting three-position switch, characterized in that: It comprises a grounding contact (1), an intermediate contact (2), a closing contact (3), a moving conductor (4) and an insulating screw (5); The grounding contact (1), the intermediate contact (2) and the closing contact (3) are arranged in sequence and spaced apart and coaxially; the insulating screw (5) passes through the grounding contact (1) and the intermediate contact (2) and is threadedly connected to the moving conductor (4); one of the intermediate contact (2) and the moving conductor (4) is provided with a sliding guide strip (22), and the other is correspondingly provided with a sliding groove (41); The insulating screw (5) is used to drive the sliding guide strip (22) to slide in the sliding groove (41), so that the first side (401) and the second side (402) of the moving conductor (4) respectively abut against the grounding contact (1) and the intermediate contact (2), or the first side (401) and the second side (402) of the moving conductor (4) respectively abut against the intermediate contact (2) and the closing contact (3), or the first side (401) and the second side (402) of the moving conductor (4) both abut against the intermediate contact (2).
2. The direct-acting three-position switch according to claim 1, characterized in that: The slide groove (41) is arranged on the moving conductor (4); the intermediate contact (2) comprises a first cylindrical shell (21); a fixing hole (212) is arranged on the inner wall of the first cylindrical shell (21); a fixing head (221) is correspondingly arranged on the sliding guide strip (22); and the fixing head (221) is fixedly inserted into the fixing hole (212).
3. The direct-acting three-position switch according to claim 1, characterized in that: The closing contact (3) comprises a second cylindrical shell (31) and a second conductor arranged on the inner side of a first end of the second cylindrical shell (31), the second conductor being arranged close to the intermediate contact (2), the second conductor being in contact with the moving conductor (4), and a plurality of heat dissipation holes (312) being arranged at intervals along the circumference of the second cylindrical shell (31).
4. The direct-acting three-position switch according to claim 3, characterized in that: A bridging conductor (32) is provided at the second end portion of the second cylindrical shell (31); a busbar bridging hole (321) communicating with the interior of the second cylindrical shell (31) is provided on the bridging conductor (32); and the heat dissipation hole (312) is provided on the second cylindrical shell (31) between the bridging conductor (32) and the second conductor.
5. The direct-acting three-position switch according to claim 1, characterized in that: The intermediate contact (2) comprises a first cylindrical shell (21) and a first conductor disposed on two axially opposite sides of the first cylindrical shell (21); the closing contact (3) comprises a second cylindrical shell (31) and a second conductor disposed in the second cylindrical shell (31) on a side close to the intermediate contact (2); and the grounding contact (1) comprises a third cylindrical shell (11) and a third conductor disposed in the third cylindrical shell (11) on a side close to the intermediate contact (2); The insulating screw (5) is used to drive the sliding guide bar (22) to slide in the sliding groove (41), so that the first side (401) and the second side (402) of the moving conductor (4) respectively abut against the third conductor and the first conductor, or the first side (401) and the second side (402) of the moving conductor (4) respectively abut against the third conductor and the second conductor, or the first side (401) and the second side (402) of the moving conductor (4) both abut against the two first conductors.
6. The direct-acting three-position switch according to claim 5, characterized in that: The first conductor comprises a spring contact finger (6), and the inner wall of the first cylindrical shell (21) is provided with a first embedding groove (211) for embedding the spring contact finger (6); and / or The second conductor comprises a spring contact finger (6), and the inner wall of the second cylindrical shell (31) is provided with a second embedding groove (311) for embedding the spring contact finger (6); and / or The third conductor comprises a spring contact finger (6), and the inner wall of the third cylindrical shell (11) is provided with a third embedding groove (111) for embedding the spring contact finger (6).
7. The direct-acting three-position switch according to claim 5, characterized in that: The side wall of the first cylindrical shell (21) is provided with a first mounting hole (213) and a through hole (214) which are arranged opposite to each other; wherein: The first mounting hole (213) is used for being fixedly connected with a bolt of a sealed pole; The through hole (214) is used to install the bolt.
8. The direct-acting three-position switch according to claim 5, characterized in that: The outer peripheral walls of the first cylindrical shell (21) and the second cylindrical shell (31) are coated with a heat dissipation coating.
9. The direct-acting three-position switch according to claim 5, characterized in that: The first side (401) and the second side (402) of the moving conductor (4) are both provided with conductive abutment end surfaces (403) along the circumferential direction, and the conductive abutment end surfaces (403) are used to abut against the first conductor, the second conductor or the third conductor. An avoidance groove (42) is provided on the moving conductor (4) between the two conductive abutment end surfaces (403) along the circumferential direction, and the avoidance groove (42) is used to avoid the first conductor, the second conductor or the third conductor.
10. The direct-acting three-position switch according to any one of claims 1 to 8, characterized in that: It also includes a shaft seal (7), an insulating bracket (8) and an aluminum plate (9), wherein the insulating bracket (8) is arranged between the shaft seal (7) and the aluminum plate (9), the insulating bracket (8) is fixedly arranged, the aluminum plate (9) is fixedly connected to the grounding contact (1), and the end of the insulating screw (5) facing away from the moving conductor (4) is successively penetrated by the aluminum plate (9) and the insulating bracket (8) and connected to the shaft seal (7).