Opening and closing mechanism of load isolation switch

Abstract

The utility model relates to an opening and closing mechanism of a load isolation switch, which comprises an insulating shell, an opening and closing rotating seat is rotatably arranged in the insulating shell, a plurality of moving contacts are arranged on the opening and closing rotating seat side by side at intervals, and static contacts which are respectively positioned on the rotating paths of the adjacent moving contacts are also arranged on the insulating shell; the static contact is provided with a plurality of mounting holes located in the insulating shell, the static contact is provided with an insulating partition plate through the mounting holes, the insulating partition plate is integrally provided with insertion columns facing the mounting holes, and the insertion columns inserted into the mounting holes are in interference fit with the inner side walls of the mounting holes; partition grooves are formed between the adjacent insulation partition plates, wherein the moving contacts which are opposite to each other can rotate in the partition grooves. The device has the advantages that the generation of electric arcs can be effectively prevented, and the overall safety is improved.

Description

Technical Field

[0001] The present application relates to the technical field of load isolating switches, and in particular to an opening and closing mechanism of a load isolating switch. Background Art

[0002] At present, load isolation switches have increased the ability to carry and disconnect load currents to a certain extent compared to traditional isolation switches. Although its main function is still to provide an obvious and safe disconnection point to achieve circuit isolation, its design allows it to directly disconnect or connect a certain range of load currents under certain conditions, rather than just completely unloaded operations. In addition to the basic isolation function, the load isolation switch can disconnect and connect a certain load current under limited conditions (such as small currents or specific conditions), which allows it to replace circuit breakers for simple circuit control in some applications.

[0003] The load isolating switch in the related technology has a structure including: a main conductive circuit, which is the core part of the isolating switch and is responsible for carrying and transmitting current. It includes a moving contact, a stationary contact, a terminal block, and a switch-opening rotating seat. The switch-opening rotating seat is rotatably arranged in an insulating housing, the moving contact is fixedly mounted on the switch-opening rotating seat, and the stationary contact is fixedly mounted at both ends of the insulating housing, and the stationary contacts are respectively located on the rotation paths of the adjacent moving contacts; the switch-opening rotating seat is controlled to rotate forward or reverse, and the external circuit is connected and disconnected through the contact and separation of the moving contact and the stationary contact.

[0004] For the above-mentioned load isolating switch, in order to enhance the stability and safety when the moving contact and the static contact are closed, the moving contact is usually designed to be multiple pieces rather than a whole piece. However, at the moment of closing or under other power-on conditions, arcing is prone to occur at the ends of adjacent moving contacts. The arcing will cause wear on the surface of the moving contact to a certain extent, thereby reducing the service life of the load isolating switch. Utility Model Content

[0005] The present application provides an opening and closing mechanism of a load isolating switch, which can effectively improve the phenomenon of arcing generated at the ends of adjacent moving contacts at the moment of closing, thereby extending the service life of the load isolating switch.

[0006] The opening and closing mechanism of a load isolating switch provided in the present application adopts the following technical solution:

[0007] A switch-on / off mechanism for a load isolating switch comprises an insulating shell, a switch-on / off rotating seat is rotatably arranged in the insulating shell, a plurality of moving contacts are arranged on the switch-on / off rotating seat in parallel and spaced apart from each other, and the insulating shell is also provided with stationary contacts respectively located on the rotation paths of adjacent moving contacts; the stationary contacts are provided with a plurality of mounting holes in the insulating shell, an insulating partition plate is provided on the stationary contacts through the mounting holes, a plug-in column facing the mounting hole is integrally formed on the insulating partition plate, and the plug-in column inserted into the mounting hole is interference fit with the inner wall of the mounting hole; and a partition groove for the respective opposite moving contacts to be rotated into is formed between adjacent insulating partition plates.

[0008] Preferably, the insulating shell includes a first cover plate and a second cover plate which are spliced ​​with each other; the inner walls of the first cover plate and the second cover plate are both provided with limiting slots facing the insulating partition plate, and a connecting piece is integrally formed on the insulating partition plate, and the connecting piece connects each insulating partition plate located on the same side of the opening and closing rotating seat in sequence; the two sides of the connecting piece are respectively inserted and fixed in their respective relative limiting slots.

[0009] Preferably, a plurality of limiting slots are provided on the same side of the connecting member, and the limiting slots are arranged in sequence and at intervals along the rotation direction of the opening and closing rotating seat.

[0010] Preferably, the first cover plate and the second cover plate are spliced ​​together to form an insertion slot for inserting one side of the static contact into the insulating shell, a limiting block is integrally formed on the inner wall of the insertion slot, and a limiting slot for plugging and cooperating with the respective opposite limiting blocks is provided on the outer wall of the static contact.

[0011] Preferably, a blocking block is integrally formed on the inner side wall of the plug-in slot, the blocking block is located on the sliding path of the static contact inserted into the plug-in slot, and the blocking block is used to contact the static contact.

[0012] Preferably, positioning blocks are integrally formed on the inner side walls of the first cover plate and the second cover plate, and the positioning blocks are located on the side of the insulating partition plate away from the opening and closing rotating seat, and the positioning blocks are in contact with the respective opposite insulating partition plates; the positioning blocks are used to limit the movement of the insulating partition plate in the direction away from the opening and closing rotating seat.

[0013] Preferably, the insulating partition plate is provided with a clearance groove between adjacent plug-in posts.

[0014] In summary, the present application includes at least one of the following beneficial technical effects:

[0015] When the opening and closing rotating seat closes the moving contact and the static contact, the moving contacts will be inserted into their respective relative separation grooves. At this time, the adjacent moving contacts can be separated by the insulating separation plate, thereby further increasing the creepage distance between adjacent moving contacts, effectively preventing the generation of arcs and improving overall safety.

[0016] By increasing the number of moving contacts, it helps to reduce contact resistance and heat generation, thereby improving the conductivity and reliability of the disconnector. When a large current passes through, lower contact resistance can prevent the contacts from welding due to overheating;

[0017] When current flows, especially under fault conditions such as short circuits, strong electromagnetic forces are generated. Using multiple moving contacts can distribute these forces more evenly, effectively preventing the moving contact from deforming or detaching from the stationary contact due to uneven force, reducing the risk of moving contact vibration or detachment due to electrodynamic force, and enhancing the stability of the circuit. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0019] Figure 2 yes Figure 1 Schematic diagram of the local structure;

[0020] Figure 3 yes Figure 2 Schematic diagram of the local structure explosion;

[0021] Figure 4 It is a schematic diagram highlighting the partial structure of the insulating partition plate.

[0022] Explanation of the reference numerals: 1. Insulating shell; 10. First cover plate; 11. Second cover plate; 12. Limiting slot; 13. Plug-in slot; 130. Limiting block; 14. Blocking block; 15. Positioning block; 2. Switch opening and closing rotating seat; 3. Moving contact; 4. Static contact; 40. Mounting hole; 41. Limiting slot; 5. Insulating partition plate; 50. Plug-in column; 51. Partitioning slot; 52. Connector; 53. Clearance slot. DETAILED DESCRIPTION

[0023] The present application is further described in detail below in conjunction with the accompanying drawings.

[0024] An embodiment of the present application discloses an opening and closing mechanism of a load isolating switch.

[0025] Reference Figure 1 , Figure 2The opening and closing mechanism of the load disconnecting switch includes an insulating housing 1, in which an opening and closing rotating seat 2 is rotatably arranged, and a plurality of moving contacts 3 are arranged in a row and spaced relationship on the opening and closing rotating seat 2. The insulating housing 1 is also provided with two stationary contacts 4 respectively located on the rotation paths of the adjacent moving contacts 3, one end of the stationary contact 4 is limitedly fixed in the insulating housing 1, and the other end of the stationary contact 4 extends from the insulating housing 1 to the outside of the insulating housing 1, and the stationary contact 4 extending to the outside of the insulating housing 1 is used for connecting to an external line.

[0026] like Figure 3 , Figure 4 As shown, the static contact 4 is provided with a plurality of mounting holes 40 located in the insulating housing 1, and a plurality of insulating partition plates 5 are plugged and fixed on the static contact 4 through the mounting holes 40. The insulating partition plates 5 are integrally formed with plug-in posts 50 facing the respective mounting holes 40. The plug-in posts 50 inserted into the mounting holes 40 are interference fit with the inner side walls of the mounting holes 40, and the insulating partition plates 5 are fixed to the static contact 4 by the mutual plug-in fit between the plug-in posts 50 and the mounting holes 40.

[0027] like Figure 2 , Figure 3 As shown, a separation groove 51 for the respective opposite single-piece moving contacts 3 to rotate into is formed between adjacent insulating separation plates 5 , and the separation groove 51 is respectively located on the rotation path of each moving contact 3 .

[0028] like Figure 1 , Figure 3 As shown, the insulating housing 1 includes two first cover plates 10 and second cover plates 11 that are spliced ​​and fixed to each other, and the first cover plates 10 and the second cover plates 11 are symmetrically arranged. A connector 52 is integrally formed on the insulating partition plate 5, and the connector 52 sequentially connects and fixes the insulating partition plates 5 installed on the same static contact 4. The inner side walls of the first cover plate 10 and the second cover plate 11 are both provided with a limiting slot 12 facing the insulating partition plate 5, and a plurality of limiting slots 12 are provided on the same side of the connecting member 52, and the limiting slots 12 on the same side are sequentially arranged at intervals along the rotation direction of the opening and closing rotating seat 2.

[0029] like Figure 2 , Figure 3 As shown, the two sides of the connector 52 are respectively inserted and fixed in their respective opposite limiting slots 12. By setting a plurality of limiting slots 12 at different positions, the installation requirements of connectors 52 of different specifications can be met, further expanding the adaptation range.

[0030] like Figure 2 , Figure 3As shown, the first cover plate 10 and the second cover plate 11 spliced ​​together form two insertion slots 13 for inserting one side of the static contact 4 into the insulating housing 1. The insertion slots 13 are respectively located on both sides of the insulating housing 1, and the shape of the insertion slots 13 is adapted to the shape of the static contact 4. The inner side wall of the insertion slot 13 facing the splicing direction of the first cover plate 10 and the second cover plate 11 is integrally formed with a limiting block 130, and the limiting blocks 130 are symmetrically arranged on both sides of the static contact 4. The outer side wall of the static contact 4 facing each limiting block 130 is provided with a limiting slot 41 for mutual insertion and matching with the respective opposite limiting blocks 130, and the shape of the limiting block 130 is adapted to the shape of the limiting slot 41. The static contact 4 is fixed in the insulating housing 1 by the mutual insertion and matching of the limiting block 130 and the limiting slot 41.

[0031] like Figure 2 , Figure 3 As shown, a blocking block 14 is integrally formed on the inner side wall of the plug slot 13, and the blocking block 14 is located on the sliding path of the static contact 4 inserted into the respective plug slots 13, and the blocking block 14 is used to contact the static contact 4. When the static contact 4 inserted into the plug slot 13 contacts the blocking block 14, the static contact 4 is limited by the blocking block 14, thereby ensuring that the limiting block 130 is smoothly plugged and matched with the limiting slot 41.

[0032] like Figure 1 , Figure 2 as well as Figure 3 As shown, positioning blocks 15 are integrally formed on the inner side walls of the first cover plate 10 and the second cover plate 11. The positioning blocks 15 are located on the side of the insulating partition plate 5 away from the opening and closing rotary seat 2, and the positioning blocks 15 are in contact with the insulating partition plates 5 opposite to each other. The positioning blocks 15 are used to limit the movement of the insulating partition plate 5 away from the opening and closing rotary seat 2, thereby ensuring the structural stability and installation reliability of the insulating partition plate 5 installed on the static contact 4.

[0033] like Figure 3 , Figure 4 As shown, the insulating partition plate 5 is provided with a clearance groove 53 located between adjacent plug-in posts 50. When the insulating partition plate 5 is plugged and fixed on the static contact 4 through the plug-in posts 50, a certain error value is inevitably present during processing, resulting in a certain deviation between the position of the plug-in post 50 and the position of the mounting hole 40. The clearance groove 53 can further increase the elastic deformation amount that can occur in the insulating partition plate 5, so as to adjust the position of the plug-in post 50 and ensure that the plug-in post 50 can be directly opposite to the mounting hole 40, so as to facilitate the smooth insertion of the plug-in post 50 into the corresponding static contact 4.

[0034] The implementation principle is: when the split-close rotary seat 2 closes the moving contact 3 and the static contact 4, the moving contact 3 will be inserted into the respective relative separation grooves 51. At this time, the adjacent moving contacts 3 can be separated under the action of the insulating partition plate 5, so that the creepage distance between the adjacent moving contacts 3 can be further increased, effectively preventing the generation of arcs and improving the overall safety. By increasing the number of moving contacts 3, it is helpful to reduce contact resistance and heat generation, thereby improving the conductivity and reliability of the disconnector. When a large current passes, the lower contact resistance can prevent the contact from being welded due to overheating. When the current passes, especially under fault conditions such as short circuits, a strong electromagnetic force will be generated. The use of multiple moving contacts 3 can distribute these forces more evenly, effectively preventing the moving contact 3 from being deformed or separated from the static contact 4 due to uneven force, reducing the risk of vibration or separation of the moving contact 3 due to the action of electric force, and enhancing the stability of the circuit.

[0035] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A switch-on / off mechanism for a load isolating switch, comprising an insulating housing (1), a switch-on / off rotating seat (2) rotatably arranged in the insulating housing (1), a plurality of movable contacts (3) arranged side by side and spaced apart on the switch-on / off rotating seat (2), and static contacts (4) respectively located on the rotation paths of adjacent movable contacts (3) arranged on the insulating housing (1); characterized in that: The stationary contact (4) is provided with a plurality of mounting holes (40) located in the insulating housing (1); an insulating partition plate (5) is provided on the stationary contact (4) through the mounting holes (40); a plug-in column (50) facing the mounting holes (40) is integrally formed on the insulating partition plate (5); the plug-in column (50) inserted into the mounting hole (40) is interference-fitted with the inner wall of the mounting hole (40); and a partition groove (51) for the respective opposite moving contacts (3) to rotate into is formed between adjacent insulating partition plates (5).

2. The opening and closing mechanism of the load isolating switch according to claim 1 is characterized in that: The insulating housing (1) comprises a first cover plate (10) and a second cover plate (11) which are spliced ​​to each other; inner side walls of the first cover plate (10) and the second cover plate (11) are both provided with limit slots (12) facing the insulating partition plate (5); a connecting piece (52) is integrally formed on the insulating partition plate (5); the connecting piece (52) sequentially connects the insulating partition plates (5) located on the same side of the opening and closing rotating seat (2); and two sides of the connecting piece (52) are respectively inserted and fixed in the respective opposite limit slots (12).

3. The opening and closing mechanism of the load isolation switch according to claim 2 is characterized in that: A plurality of limiting slots (12) are provided on the same side of the connecting member (52), and the limiting slots (12) are arranged in sequence and at intervals along the rotation direction of the opening and closing rotating seat (2).

4. The opening and closing mechanism of the load isolating switch according to claim 2 is characterized in that: The first cover plate (10) and the second cover plate (11) are spliced ​​together to form an insertion slot (13) for inserting one side of the stationary contact (4) into the insulating housing (1), a limiting block (130) is integrally formed on the inner side wall of the insertion slot (13), and a limiting slot (41) for plugging and cooperating with the respective opposite limiting blocks (130) is provided on the outer side wall of the stationary contact (4).

5. The opening and closing mechanism of the load isolating switch according to claim 4 is characterized in that: A blocking block (14) is integrally formed on the inner side wall of the plug-in slot (13); the blocking block (14) is located on a sliding path when the stationary contact (4) is inserted into the plug-in slot (13); and the blocking block (14) is used to contact the stationary contact (4).

6. The opening and closing mechanism of the load isolating switch according to claim 5, characterized in that: Positioning blocks (15) are integrally formed on the inner side walls of the first cover plate (10) and the second cover plate (11); the positioning blocks (15) are located on a side of the insulating partition plate (5) away from the opening and closing rotary seat (2), and the positioning blocks (15) are in contact with the insulating partition plates (5) facing each other; the positioning blocks (15) are used to limit the movement of the insulating partition plate (5) in a direction away from the opening and closing rotary seat (2).

7. The opening and closing mechanism of the load isolating switch according to claim 1 is characterized in that: The insulating partition plate (5) is provided with a clearance groove (53) between adjacent plug-in columns (50).

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