Sulfur hexafluoride load switch

Abstract

The utility model relates to the field of load switches, and particularly discloses a sulfur hexafluoride load switch. The sulfur hexafluoride load switch comprises an upper shell and a lower shell, a plurality of upper static contacts are fixedly installed at the end, deviating from the lower shell, of the upper shell, a plurality of lower static contacts are fixedly installed at the end, deviating from the upper shell, of the lower shell, a main shaft is rotationally connected to the inner side of the lower shell, and the main shaft is rotationally connected to the outer side of the lower shell. The outer side of the main shaft is provided with a plurality of moving contacts matched with the upper static contacts and the lower static contacts, the outer side of the main shaft is provided with a plurality of positioning pieces used for fixing the moving contacts, and the inner side of the lower shell is fixedly connected with a plurality of insulating contacts used for limiting the moving contacts. The moving contact and the insulating contact are convenient to mount and dismount, parts are convenient to replace or maintain, the maintenance cost and time are reduced, the special structure of the moving contact can increase the contact area with the static contact, the contact resistance is reduced, and the energy consumption and heating are reduced, so that the service life of the switch is prolonged.

Description

Technical Field

[0001] This application relates to the field of load switches, and more particularly to a sulfur hexafluoride load switch. Background Technology

[0002] A sulfur hexafluoride (SF6) load switch is a high-voltage switchgear that uses sulfur hexafluoride (SF6) gas as both insulation and arc-extinguishing medium, and is widely used in power systems. SF6 load switches utilize the excellent insulation and arc-extinguishing properties of SF6 gas; during switch operation, the flow and pressure changes of the gas extinguish the electric arc, thereby opening and closing the circuit. SF6 gas has high insulation strength, enabling the isolation and control of high-voltage circuits within a relatively small space.

[0003] In the prior art, in order to ensure that the moving contact in the sulfur hexafluoride load switch can be firmly installed on the main shaft, its fixing structure is relatively complex, which makes it inconvenient to replace and repair the moving contact later, thus affecting the convenience and reliability of switch maintenance. Utility Model Content

[0004] To facilitate the replacement and maintenance of the moving contact and improve the convenience and reliability of switch maintenance, this application provides a sulfur hexafluoride load switch.

[0005] The sulfur hexafluoride load switch provided in this application adopts the following technical solution:

[0006] A sulfur hexafluoride load switch includes an upper housing and a lower housing. Multiple upper stationary contacts are fixedly mounted on one end of the upper housing away from the lower housing, and multiple lower stationary contacts are fixedly mounted on one end of the lower housing away from the upper housing. A main shaft is rotatably connected to the inner side of the lower housing. Multiple moving contacts that cooperate with the multiple upper and lower stationary contacts are mounted on the outer side of the main shaft. Multiple positioning elements for fixing the moving contacts are mounted on the outer side of the main shaft. Multiple insulating contacts for limiting the moving contacts are fixedly connected to the inner side of the lower housing.

[0007] By adopting the above technical solution, firstly, the split design of the upper and lower housings facilitates the assembly and maintenance of the switch. The upper and lower stationary contacts are fixed on the upper and lower housings respectively, and the moving contact is mounted on the main shaft and cooperates with the stationary contact. This structural layout is clear and can realize the basic function of the switch, that is, to control the opening and closing of the circuit by the contact and separation of the moving contact and the stationary contact. Secondly, the insulating contact is used to limit the moving contact, which can effectively prevent the moving contact from deviating or contacting unspecified parts during movement, thereby improving the safety and reliability of the switch and avoiding short circuits or failures caused by misoperation or accidents.

[0008] Optionally, the positioning element includes a positioning block and a fastening bolt. A positioning groove for mounting the positioning block is provided on the outer side of the main shaft. A retaining groove for mounting the moving contact is provided between the positioning block and the positioning groove. The fastening bolt passes through the positioning block and one end is threaded to the inner wall of the positioning groove.

[0009] By adopting the above technical solution, the moving contact can be firmly installed on the main shaft, ensuring that the moving contact will not loosen or fall off during the rotation of the main shaft, thereby ensuring the stability and reliability of the switch. In addition, the design of the positioning block and fastening bolt makes the installation and disassembly of the moving contact more convenient and quick, facilitating the replacement or repair of the moving contact and reducing maintenance costs and time.

[0010] Optionally, the moving contact consists of two moving contact pieces, which are fixedly connected at the middle, and both ends of the two moving contact pieces are Y-shaped.

[0011] By adopting the above technical solutions, the contact area between the moving contact and the stationary contact can be increased, the stability of the contact can be improved, and the contact resistance can be reduced, thereby reducing the energy consumption and heat generation of the switch during operation, extending the service life of the switch, and also better adapting to different contact angles and positions, improving the switching capacity and reliability of the switch.

[0012] Optionally, the upper housing has multiple through holes along one side edge that fits against the lower housing, and the inner wall of the through holes is threaded with fixing bolts that are threadedly connected to the lower housing.

[0013] By adopting the above technical solution, it is possible to ensure that the upper and lower housings fit tightly, prevent leakage of sulfur hexafluoride gas inside, ensure the sealing performance of the switch, thereby improving the safety and reliability of the switch, ensuring the matching accuracy between them, and also facilitating disassembly for maintenance or replacement of parts when needed.

[0014] Optionally, a limiting groove is provided on the side of the lower housing that is in contact with the upper housing, and a sealing gasket is installed on the inner side of the limiting groove. A sealing groove is provided on the side of the lower housing that is in contact with the upper housing, and when the lower housing and the upper housing are in contact, one side of the sealing gasket abuts against the inner wall of the sealing groove.

[0015] By adopting the above technical solution, it is possible to effectively prevent external dust, moisture and other impurities from entering the switch, and at the same time prevent the leakage of internal sulfur hexafluoride gas, further improving the sealing performance and protection level of the switch, enhancing the adaptability and reliability of the switch in harsh environments, and preventing loosening or misalignment between the housings due to external forces or vibrations, thereby ensuring the overall structural stability of the switch.

[0016] Optionally, one end of the lower housing is provided with a positioning hole for one end of the spindle to pass through, and the inner side of the other end of the lower housing is provided with a slot that is rotatably connected to the outer wall of the other end of the spindle.

[0017] By adopting the above technical solution, the positioning hole can ensure that one end of the spindle accurately passes through the lower housing, while the slot provides stable rotation support for the other end of the spindle, enabling the spindle to rotate smoothly, thereby driving the moving contact to make contact and separate from the stationary contact, ensuring the normal operation of the switch. Moreover, this spindle installation method makes the entire switch structure more compact, reduces space occupation, and is conducive to the miniaturization design of the switch, making it better adaptable to different installation environments and application scenarios.

[0018] Optionally, the inner side of the lower housing is fixedly connected with a plurality of mounting portions for mounting insulating contacts, and one end of the insulating contact is threadedly connected to a fastener whose end is threadedly connected to the inner wall of the mounting portion.

[0019] By adopting the above technical solution, it can be ensured that the insulating contact is firmly installed in the lower housing and will not loosen or fall off due to external force or vibration. This ensures that the insulating contact can stably perform its function of limiting the moving contact, improving the safety and reliability of the switch. At the same time, the fasteners make the installation and removal of the insulating contact more convenient, facilitating maintenance or replacement of the insulating contact when needed, and reducing maintenance costs and time.

[0020] Optionally, a limiting plate is provided on one side of the upper stationary contact and is fixedly connected to the inner wall of the upper housing. The limiting plate is used to restrict the connection between the moving contact and the upper stationary contact.

[0021] By adopting the above technical solution, excessive or poor contact between the moving contact and the upper stationary contact can be prevented, ensuring accurate contact position and stable contact state between the moving contact and the upper stationary contact, thereby improving the switching performance and reliability of the switch.

[0022] In summary, this application has the following beneficial effects:

[0023] This application utilizes the positioning block and fastening bolts of the positioning component and the fastener design of the insulating contact to facilitate the installation and disassembly of the moving contact and the insulating contact, making it easier to replace or repair the components, reducing maintenance costs and time. The special structure of the moving contact can increase the contact area with the stationary contact, reduce contact resistance, reduce energy consumption and heat generation, thereby extending the service life of the switch.

[0024] 2. This application facilitates the assembly and maintenance of the upper and lower housings. The insulated contacts effectively prevent the moving contacts from shifting or making accidental contact. The positioning components ensure that the moving contacts are securely installed. The sealing structure prevents gas leakage and impurities from entering. The limiting plate restricts the connection between the moving contacts and the upper stationary contacts, preventing dangerous situations such as short circuits or arcing, thereby improving the safety and reliability of the switch. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the structure of a sulfur hexafluoride load switch according to an embodiment of this application;

[0026] Figure 2 This is a top view of the upper housing according to an embodiment of this application;

[0027] Figure 3 This is a schematic diagram of the lower shell structure according to an embodiment of this application;

[0028] Figure 4 This is a schematic diagram of the upper shell structure according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the main shaft and moving contact in an embodiment of this application.

[0030] Explanation of reference numerals in the attached drawings: 1. Upper housing; 11. Upper stationary contact; 12. Through hole; 13. Fixing bolt; 14. Limiting groove; 15. Sealing gasket; 16. Limiting plate; 2. Lower housing; 21. Lower stationary contact; 22. Positioning hole; 23. Slot; 24. Mounting part; 25. Sealing groove; 3. Main shaft; 31. Positioning groove; 4. Moving contact; 41. Moving contact piece; 5. Positioning component; 51. Positioning block; 52. Fastening bolt; 53. Slot; 6. Insulating contact; 61. Fastener. Detailed Implementation

[0031] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.

[0032] This application discloses a sulfur hexafluoride load switch.

[0033] Reference Figure 1The sulfur hexafluoride load switch includes an upper housing 1 and a lower housing 2. Both the upper housing 1 and the lower housing 2 have interconnected arc-shaped grooves on adjacent sides. A main shaft 3, connected to the lower housing 2, is located inside the arc-shaped groove. A moving contact 4 is fixedly installed on the outside of the main shaft 3. When the main shaft 3 rotates, it drives the moving contact 4 to rotate inside the arc-shaped groove. Multiple upper stationary contacts 11 are fixedly installed at the end of the upper housing 1 opposite to the lower housing 2, and multiple lower stationary contacts 21 are fixedly installed at the end of the lower housing 2 opposite to the upper housing 1. When the upper stationary contacts 11 and lower stationary contacts 21 are respectively connected to one end of the moving contact 4, the switch is energized. When the upper stationary contacts 11 and lower stationary contacts 21 are respectively separated from the moving contact 4, the switch is de-energized.

[0034] Reference Figure 2 , Figure 3 The upper housing 1 has multiple through holes 12 on its edge near the lower housing 2 for fixing bolts 13 to pass through. The lower end of the fixing bolts 13 is threaded to the inner wall of the edge of the lower housing 2 to fix the upper housing 1 to one side of the lower housing 2, ensuring the stability of the connection. A limiting groove 14 is formed on the side of the upper housing 1 near the lower housing 2, and the limiting groove 14 is located inside the multiple through holes 12. A sealing gasket 15 is installed on the inner wall of the limiting groove 14. A sealing groove 25 is formed on one side of the upper housing 1 for the sealing gasket 15 to be inserted into. The connection between the sealing gasket 15 and the inner wall of the sealing groove 25 ensures the sealing performance when the upper housing 1 and the lower housing 2 are connected, preventing the leakage of sulfur hexafluoride gas from the inner wall of the arc-shaped groove.

[0035] Reference Figure 3 Multiple mounting portions 24 are fixedly installed along the arc-shaped groove edge of the lower housing 2. An insulating contact 6 is mounted on the upper side of the mounting portion 24, and a fastener 61 with its lower end threaded to the inner wall of one end of the insulating contact 6 is threaded to the inner wall of the mounting portion 24. The fastener 61 is used to fix the insulating contact 6 on the upper side of the mounting portion 24, so that the insulating contact 6 is located between the arc-shaped groove of the upper housing 1 and the lower housing 2. When the drive spindle 3 rotates, causing the two ends of the moving contact 4 to disengage from the upper stationary contact 11 and the lower stationary contact 21, as the spindle 3 continues to rotate, until one end of the moving contact 4 contacts both sides of the insulating contact 6, the spindle 3 stops rotating, thus completing the restriction of the position of the moving contact 4.

[0036] Reference Figure 4 , Figure 5The moving contact 4 consists of two moving contact pieces 41, which are fixedly connected at the middle, and their two ends form a Y-shape when connected. The inner sides of the two ends of the moving contact pieces 41 are connected to the upper stationary contact 11, the lower stationary contact 21, and both sides of the insulating contact 6 via the main shaft 3, respectively, to ensure the stability of the connection between the moving contact 4 and these contacts. A limiting plate 16 is fixedly connected to the inner wall of the upper housing 1. The limiting plate 16 is located on one side of the upper stationary contact 11 to ensure accurate contact position and stable contact state between the moving contact 4 and the upper stationary contact 11, thereby improving the switching performance.

[0037] Reference Figure 5 The main shaft 3 has round ends and a rectangular middle section. One end of the lower housing 2 has a positioning hole 22 for the main shaft 3 to pass through, and the other end of the lower housing 2 has a slot 23 for rotatably connecting to the other end of the main shaft 3. The slot 23 prevents misalignment of the main shaft 3 during rotation. The end of the main shaft 3 passing through the positioning hole 22 connects to a drive structure that drives the main shaft 3 to rotate, thus connecting and separating the moving contact 4 from the upper stationary contact 11 and the lower stationary contact 21. Multiple positioning slots 31 are provided on the outer side of the rectangular section. Each positioning slot 31 has a positioning element 5 installed on its inner wall. The positioning element 5 consists of a positioning block 51 and a fastening bolt 52, which secures the positioning block 51 to the inner wall of the positioning slot 31. A slot 53 is provided between the positioning block 51 and the positioning groove 31 for mounting the moving contact 4. The inner wall of the slot 53 is connected to the middle outer wall of the moving contact 4 to ensure the stability of the connection between the moving contact 4 and the main shaft 3.

[0038] The implementation principle of the sulfur hexafluoride load switch in this application embodiment is as follows: During assembly, firstly, the upper stationary contact 11 is fixedly installed on the upper housing 1, so that one end of the upper stationary contact 11 extends into the arc-shaped groove of the upper housing 1, and then the lower stationary contact 21 is fixedly installed on the lower housing 2, so that the lower stationary contact 21 extends into the arc-shaped groove of the lower housing 2, thus completing the installation of the upper stationary contact 11 and the lower stationary contact 21; secondly, one end of the main shaft 3 is inserted into the slot 23 at one end of the lower housing 2, and then its other end is passed through the positioning hole 22 of the lower housing 2; thirdly, the middle part of the moving contact 4 is inserted into the slot 53 of the positioning groove 31. At this time, the positioning block 51 is inserted into the positioning groove 31, and then the fastening bolt 52 is tightened through the positioning block 51 with the help of a tool. The moving contact 4 is fixed on the main shaft 3 by inserting it into the inner wall of the positioning groove 31 until the positioning block 51 abuts against the inner wall of the positioning groove 31, thus completing the installation of the moving contact 4; the fourth step is to attach one end of the insulating contact 6 to the upper side of the mounting part 24, and then use a tool to tighten the fastener 61 to fix the insulating contact 6 to the upper side of the mounting part 24, thus completing the installation of the insulating contact 6; the fifth step is to move the upper housing 1 so that one side of it abuts against one side of the lower housing 2, and then use a tool to pass the fixing bolt 13 through the through hole 12 on the edge of the upper housing 1 and turn it into the inner wall of the lower housing 2 until the upper housing 1 is completely abutted against one side of the lower housing 2. At this time, the sealing gasket 15 abuts against the inner wall of the sealing groove 25, thus completing the assembly of the upper housing 1 and the lower housing 2.

[0039] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A sulphur hexafluoride load switch comprising an upper housing (1) and a lower housing (2), characterized in that: Multiple upper stationary contacts (11) are fixedly installed on one end of the upper housing (1) away from the lower housing (2), and multiple lower stationary contacts (21) are fixedly installed on one end of the lower housing (2) away from the upper housing (1). A main shaft (3) is rotatably connected to the inner side of the lower housing (2). Multiple moving contacts (4) that cooperate with the multiple upper stationary contacts (11) and lower stationary contacts (21) are installed on the outer side of the main shaft (3). Multiple positioning parts (5) for fixing the moving contacts (4) are installed on the outer side of the main shaft (3). Multiple insulating contacts (6) for limiting the moving contacts (4) are fixedly connected to the inner side of the lower housing (2).

2. The sulfur hexafluoride load switch of claim 1, wherein: The positioning component (5) includes a positioning block (51) and a fastening bolt (52). The outer side of the main shaft (3) is provided with a positioning groove (31) for mounting the positioning block (51). A slot (53) for mounting the moving contact (4) is provided between the positioning block (51) and the positioning groove (31). The fastening bolt (52) passes through the positioning block (51) and one end is threaded to the inner wall of the positioning groove (31).

3. The sulfur hexafluoride load switch according to claim 1, characterized in that: The moving contact (4) is composed of two moving contact pieces (41), which are fixedly connected in the middle, and both ends of the two moving contact pieces (41) are Y-shaped.

4. The sulfur hexafluoride load switch of claim 1, wherein: The upper shell (1) has multiple through holes (12) along one side edge that fits the lower shell (2), and the inner wall of the through hole (12) is threaded with a fixing bolt (13) that is threaded to the lower shell (2).

5. The SF6 load switch of claim 1, wherein: The lower housing (2) has a limiting groove (14) on one side that fits into the upper housing (1). A sealing gasket (15) is installed on the inner side of the limiting groove (14). A sealing groove (25) is provided on one side of the lower housing (2) that fits into the upper housing (1). When the lower housing (2) fits into the upper housing (1), one side of the sealing gasket (15) abuts against the inner wall of the sealing groove (25).

6. The sulfur hexafluoride load switch of claim 1, wherein: One end of the lower housing (2) is provided with a positioning hole (22) for one end of the main shaft (3) to pass through, and the other end of the lower housing (2) is provided with a slot (23) that is rotatably connected to the outer wall of the other end of the main shaft (3).

7. The SF6 load switch of claim 1, wherein: The lower housing (2) has a plurality of mounting parts (24) fixedly connected to the inner side for mounting the insulating contact (6), and one end of the insulating contact (6) is threadedly connected to a fastener (61) whose end is threadedly connected to the inner wall of the mounting part (24).

8. The SF6 load switch of claim 1, wherein: A limiting plate (16) is provided on one side of the upper stationary contact (11) and is fixedly connected to the inner wall of the upper housing (1). The limiting plate (16) is used to restrict the connection between the moving contact (4) and the upper stationary contact (11).

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