Disconnecting switch base of disconnecting switch

Abstract

The utility model relates to the technical field of disconnecting switches, in particular to a disconnecting switch disconnecting link base. An upper bearing and a lower bearing are fixedly installed in the outer shaft sleeve, the main shaft penetrates through the outer shaft sleeve and penetrates through inner rings of the upper bearing and the lower bearing, an upper partition plate and a lower partition plate are arranged in the outer shaft sleeve at intervals, an upper dustproof cover is arranged above the upper partition plate, and an upper lubricating cavity is defined by the upper dustproof cover and the upper partition plate. The upper bearing is located in the upper lubricating cavity, the lower bearing is located in the lower lubricating cavity, an oil injection nozzle is arranged outside the outer shaft sleeve and connected with an oil injection pipeline, and the oil injection pipeline is arranged between the upper partition plate and the lower partition plate and communicated with the corresponding lubricating cavity. The oil injection pipelines are hermetically connected with the corresponding partition plates; according to the disconnecting link base of the disconnecting switch, the cleaning difficulty is reduced, the oil quantity is saved, and meanwhile, the independent lubricating effect of the upper bearing and the lower bearing can be improved.

Description

Technical Field

[0001] This utility model relates to the field of disconnecting switch technology, and in particular to a disconnecting switch knife switch base. Background Technology

[0002] A disconnecting switch is a high-voltage switching device that primarily achieves circuit closure and disconnection through the contact and separation of moving and stationary contacts. In critical load power supply systems, disconnecting switches are typically used in conjunction with critical load disconnectors to ensure the reliability of power supply to key equipment. Additionally, a bypass busbar system, as a power configuration that enhances the reliability and flexibility of the power system, uses bypass busbar disconnectors for switching. This allows for maintenance or replacement of the main busbar without power interruption, thus ensuring continuous operation of the power system. In a bypass busbar system, bypass busbar disconnectors work in conjunction with disconnecting switches on the main busbar to achieve switching between the main busbar and the bypass busbar. When maintenance of the main busbar is required, the main busbar to be maintained is typically isolated from the system using a disconnecting switch, while the bypass busbar maintains power supply to the system.

[0003] Since disconnecting switches mainly operate outdoors, and bypass disconnectors and critical load disconnectors are rarely operated, their internal bearings are prone to corrosion due to rain and snow, leading to difficulty in opening and closing. To address this issue, Chinese utility model patent CN203503503U, published on March 26, 2014, discloses a rust-proof 35KV disconnecting switch. This disconnecting switch includes a bushing and a linkage shaft. End sleeves are sealed to the upper and lower ends of the bushing, forming a lubrication chamber with the bushing. Upper and lower bearings are installed above and below the lubrication chamber. The linkage shaft passes through the lubrication chamber while simultaneously passing through and being fixed to the inner rings of the upper and lower bearings. The outer rings of the upper and lower bearings are fixed to the bushing. An oil injection hole is provided on the upper end sleeve, allowing lubricating oil to be introduced into the lubrication chamber, thus lubricating both the upper and lower bearings.

[0004] However, the above scheme only has one lubrication chamber, that is, the upper and lower bearings are in the same lubrication chamber. To achieve simultaneous lubrication of the upper and lower bearings, the lubrication chamber needs to be completely filled with lubricating oil. In the state of full oil, the lubricating oil at the top and bottom flows and lubricates as the bearing rollers rotate. However, the lubricating oil between the upper and lower bearings has poor fluidity. In the state of no flow for a long time, the lubricating oil between the upper and lower bearings will solidify, which is difficult to clean and will reduce the lubrication effect on the upper and lower bearings. Utility Model Content

[0005] The purpose of this utility model is to provide a disconnect switch knife switch base, which aims to solve the problem that when the lubrication chamber inside the bushing of the existing disconnect switch is full of oil, the lubricating oil between the upper and lower bearings will solidify, making it difficult to clean and reducing the lubrication effect on the upper and lower bearings.

[0006] To achieve the above objectives, the disconnector switch base of this utility model adopts the following technical solution:

[0007] A disconnector switch base includes a main shaft and an outer bushing with an upper bearing and a lower bearing fixedly mounted inside. The main shaft passes through the outer bushing and through the inner rings of the upper and lower bearings. An upper partition and a lower partition are spaced apart inside the outer bushing. An upper dust cover is provided above the upper partition and together with it forms an upper lubrication cavity. A lower dust cover is provided below the lower partition and together with it forms a lower lubrication cavity. The upper bearing is located in the upper lubrication cavity, and the lower bearing is located in the lower lubrication cavity. An oil injection nozzle is provided on the outside of the outer bushing. The oil injection nozzle is connected to an oil injection pipeline. The oil injection pipeline is arranged between the upper and lower partitions and communicates with the corresponding lubrication cavity to deliver lubricating oil to lubricate the corresponding bearing. The oil injection pipeline and the corresponding partition are sealed together.

[0008] Furthermore, the upper partition plate near the upper bearing and the lower partition plate near the lower bearing are both provided with annular grooves, and the oil injection pipeline leads to the annular grooves of the corresponding partition plates, the annular grooves forming the flow path of the lubricating oil.

[0009] Furthermore, the oil injection pipeline includes an independent upper pipeline and a lower pipeline. The upper pipeline is connected to the upper lubrication chamber, and the lower pipeline is connected to the lower lubrication chamber. Each of the upper pipeline and the lower pipeline is connected to an oil injection nozzle.

[0010] Furthermore, a check valve is installed inside the oil injection nozzle.

[0011] Furthermore, a lower dust cover fastening groove is provided on the lower end face of the outer bushing, and the lower dust cover is installed in the lower dust cover fastening groove.

[0012] Furthermore, a support cylinder section is provided between the upper partition and the lower partition. The diameter of the support cylinder section is smaller than the diameter of the upper partition and the lower partition. The support cylinder section divides the space between the upper partition and the lower partition into an inner cavity and an outer cavity, and the oil injection pipeline is arranged in the outer cavity.

[0013] Furthermore, one end of the main shaft is fixed with a flange for fixed connection with an insulating porcelain bottle, and the other end is connected with a power receiving gear that drives the main shaft to rotate.

[0014] Furthermore, the power receiving gear is connected to the main shaft via a key, and the end of the main shaft near the power receiving gear is provided with a threaded section, which is threadedly connected with a fixing bolt to fix the power receiving gear.

[0015] Furthermore, the power receiving gear is a sector gear.

[0016] Furthermore, the spindle passes through the upper dust cover and the lower dust cover in sequence. An upper sealing ring is provided between the upper dust cover and the spindle, and a lower sealing ring is provided between the lower dust cover and the spindle.

[0017] Beneficial Effects: The disconnect switch base of this utility model is an improved invention. By setting partitions and dust covers located at the top and bottom inside the outer bushing, and placing the upper and lower bearings respectively in the upper lubrication cavity formed by the upper partition and upper dust cover, and the lower lubrication cavity formed by the lower partition and lower dust cover, the upper and lower bearings are respectively located in independent chambers. An oil injection nozzle is installed on the outer bushing, and the oil injection nozzle is connected to the upper and lower lubrication cavities through an oil injection pipeline. Simultaneously, the oil injection pipeline is sealed to the corresponding partitions to prevent oil leakage. Lubricating oil is delivered to the upper and lower lubrication cavities through the oil injection nozzle, thereby achieving lubrication of the upper and lower bearings. Compared with the prior art, this utility model avoids the solidification of lubricating oil between the upper and lower bearings when they are in the same lubrication chamber, reducing cleaning difficulty, saving oil, and improving the independent lubrication effect of the upper and lower bearings. Attached Figure Description

[0018] Figure 1 This is an exploded view of the structure of one embodiment of the disconnecting switch of this utility model;

[0019] Figure 2 This is a front view structural schematic diagram of an embodiment of the disconnecting switch of this utility model;

[0020] Figure 3 This is a front cross-sectional view of one embodiment of the disconnector switch base of this utility model.

[0021] In the diagram: 1. Outer bushing; 2. Upper bearing; 3. Lower bearing; 4. Upper partition; 5. Lower partition; 6. Upper dust cover; 7. Lower dust cover; 8. Upper lubrication chamber; 9. Lower lubrication chamber; 10. Oil injector; 11. Oil injection line; 12. Annular groove; 13. Upper pipeline; 14. Lower pipeline; 15. Fixing bolt; 16. Support cylinder section; 17. Inner cavity; 18. Outer cavity; 19. Main shaft; 20. Flange; 21. Power receiving gear; 22. Sealing ring; 23. Lower sealing ring. Detailed Implementation

[0022] The features and performance of this utility model will be further described in detail below with reference to the embodiments.

[0023] This invention addresses the problem in existing disconnect switches where both upper and lower bearings are simultaneously filled with oil in their lubrication chambers. While this allows for simultaneous lubrication of both bearings, the lubricating oil between them tends to solidify over time when stagnant, making it difficult to clean and affecting the lubrication effect. The invention solves this problem by placing the upper and lower bearings in separate lubrication chambers and introducing lubricating oil into each chamber, thus achieving independent lubrication for both bearings and preventing the formation of solidified lubricating oil. Based on this concept, this invention proposes a disconnect switch base. This base utilizes partitions and dust covers located above and below the outer bushing, forming a lubrication chamber. The bearings are placed within this lubrication chamber, and lubricating oil is introduced through an oil injection pipe to achieve lubrication.

[0024] The embodiment of the disconnect switch knife switch base of this utility model:

[0025] See Figures 1 to 3 As a basic embodiment of this utility model, the disconnect switch knife switch base includes a main shaft 19 and an outer bushing 1 with an upper bearing 2 and a lower bearing 3 fixedly installed inside. The main shaft 19 passes through the outer bushing 1 and through the inner rings of the upper bearing 2 and the lower bearing 3. An upper partition 4 and a lower partition 5 are spaced apart inside the outer bushing 1. An upper dust cover 6 is provided above the upper partition 4 and forms an upper lubrication cavity 8 with the upper dust cover 6. A lower dust cover 7 is provided below the lower partition 5 and forms a lower lubrication cavity 9 with the lower dust cover 7. The upper bearing 2 is located in the upper lubrication cavity 8, and the lower bearing 3 is located in the lower lubrication cavity 9, so that the upper bearing 2 and the lower bearing 3 are in independent cavities. An oil injection nozzle 10 is provided on the outside of the outer bushing 1. The oil injection nozzle 10 is connected to an oil injection pipe 11. The oil injection pipe 11 is arranged between the upper partition 4 and the lower partition 5 and is connected to the corresponding... The lubrication chambers are connected to deliver lubricating oil to the corresponding bearings. The oil injection line 11 is sealed to the corresponding partition to prevent lubricating oil from leaking between the oil injection line 11 and the partition, ensuring that the lubricating oil is stored in the corresponding lubrication chamber and plays a lubricating role. That is, the oil injection line 11 is connected to the upper lubrication chamber 8 and the lower lubrication chamber 9 respectively. Lubricating oil is delivered to the upper lubrication chamber 8 and the lower lubrication chamber 9 through the oil injection nozzle 10 and the oil injection line 11, which can realize the lubrication of the upper bearing 2 and the lower bearing 3. It ensures that the upper bearing 2 and the lower bearing 3 can maintain a lubricated state, avoiding the situation in the prior art where the lubricating oil between the upper bearing 2 and the lower bearing 3 is solidified when the upper bearing 2 and the lower bearing 3 are in the same lubrication chamber. This reduces the cleaning difficulty, saves oil, and also improves the independent lubrication effect of the upper bearing 2 and the lower bearing 3.

[0026] In a preferred embodiment of this utility model, annular grooves 12 are provided on the end face of the upper partition 4 near the upper bearing 2 and the end face of the lower partition 5 near the lower bearing 3. The oil injection pipe 11 leads to the annular groove 12 of the corresponding partition, meaning the oil injection pipe 11 is connected to the annular groove 12 of the corresponding partition. The annular groove 12 forms the flow path of the lubricating oil and connects to the corresponding lubrication cavity. When lubricating oil is introduced into the oil injection pipe 11 through the oil injection nozzle 10, the lubricating oil flows out of the oil injection pipe 11 and flows along the annular groove 12 until it contacts the bearing, thus lubricating the bearing. The annular groove 12 increases the flow rate of the lubricating oil, allowing it to flow along the annular groove 12 and quickly fill the lubrication cavity. In other embodiments, the partition is a flat plate. The lubricating oil flows from the oil injection pipe 11 to the top of the partition and flows in all directions along the corresponding partition. After a period of time, it can also fill the lubrication cavity, thus lubricating the bearing.

[0027] In a preferred embodiment of this utility model, the oil injection pipeline 11 includes an independent upper pipeline 13 and a lower pipeline 14. The upper pipeline 13 is connected to the upper lubrication chamber 8, and the lower pipeline 14 is connected to the lower lubrication chamber 9. Each of the upper pipeline 13 and the lower pipeline 14 is connected to an oil injection nozzle 10. By dividing the oil injection pipeline 11 into an upper pipeline 13 connected to the upper lubrication chamber 8 and a lower pipeline 14 connected to the lower lubrication chamber 9, it is convenient to control the delivery of lubricating oil separately. When the upper bearing 2 needs to be replenished with oil, only lubricating oil needs to be introduced into the upper pipeline 13. Similarly, when the lower bearing 3 needs to be replenished with oil, only lubricating oil needs to be introduced into the lower pipeline 14. If both the upper bearing 2 and the lower bearing 3 need to be replenished with oil, lubricating oil can be introduced into both the upper pipeline 13 and the lower pipeline 14. In other embodiments, the oil injection line 11 can also be configured as a T-shaped line, with one end of the T-shaped line connected to the oil injection nozzle 10 and the other two ends connected to the upper lubrication chamber 8 and the lower lubrication chamber 9 respectively. In this case, lubricating oil is introduced into the oil injection nozzle 10, which can simultaneously replenish the upper lubrication chamber 8 and the lower lubrication chamber 9, that is, simultaneously replenish the upper bearing 2 and the lower bearing 3.

[0028] As a preferred embodiment of the present invention, a check valve is installed inside the oil injection nozzle 10, that is, the lubricating oil can only flow into the oil injection pipeline 11 through the oil injection nozzle 10 and will not flow out of the oil injection nozzle 10 along the oil injection pipeline 11. This setting facilitates the storage of lubricating oil in the lubrication chamber.

[0029] In a preferred embodiment of this utility model, a lower dust cover snap-in groove is provided on the lower end face of the outer bushing 1, and the lower dust cover 7 is installed in the lower dust cover snap-in groove. In this embodiment, an upper dust cover snap-in groove is also provided on the upper end face of the outer bushing 1, and the upper dust cover 6 is installed in the upper dust cover snap-in groove. The upper dust cover 6 and the lower dust cover 7 work together to form a sealed chamber with the outer bushing 1, which can prevent rainwater and dust from entering the outer bushing and causing the bearing to rust or become stuck. In this embodiment, the upper dust cover 6 and the lower dust cover 7 can also work with the corresponding partition to form a corresponding lubrication cavity so that the lubricating oil is stored in the lubrication cavity. Therefore, the dust cover not only prevents dust and water, but also has the function of storing oil.

[0030] In a preferred embodiment of this utility model, a support cylinder section 16 is provided between the upper partition 4 and the lower partition 5. The support cylinder section 16 provides support for the upper partition 4 and the lower partition 5, improving the connection strength between the upper partition 4 and the lower partition 5 and the outer bushing 1. The diameter of the support cylinder section 16 is smaller than the diameter of the upper partition 4 and the lower partition 5. The support cylinder section 16 divides the space between the upper partition 4 and the lower partition 5 into an inner cavity 17 and an outer cavity 18. The oil injection pipe 11 is arranged in the outer cavity 18, so that the oil injection pipe 11 abuts against the outer wall of the support cylinder section 16, which can improve the stability of the oil injection process. In other embodiments, the support cylinder section 16 can also be omitted. In this case, the oil injection pipe 11 abuts against the inner wall of the outer bushing 1, which can also ensure the stability of the oil injection process.

[0031] In a preferred embodiment of this invention, one end of the main shaft 19 is fixed with a flange 20 for fixed connection with an insulating porcelain insulator, and the other end is connected to a power receiving gear 21 that drives the main shaft 19 to rotate. The flange 20 and the insulating porcelain insulator are connected and fixed by fasteners. The power receiving gear 21 is used to mesh with the power output gear to form a rotational drive, thereby realizing the opening and closing operation of the disconnector switch base. In other embodiments, one end of the main shaft can also be connected to the output shaft of a motor, and the motor controls the rotation of the main shaft to complete the opening and closing operation.

[0032] In a preferred embodiment of this invention, the power receiving gear 21 is connected to the main shaft 19 via a key. The end of the main shaft 19 near the power receiving gear 21 has a threaded section, and a fixing bolt 15 is threadedly connected to the threaded section to secure the power receiving gear 21, ensuring reliable connection between the power receiving gear 21 and the main shaft 19, as well as stability when driving the main shaft 19 to rotate. In other embodiments, the power receiving gear 21 can also be welded to the main shaft 19, which also achieves a reliable connection between the power receiving gear 21 and the main shaft 19.

[0033] In a preferred embodiment of this utility model, the power receiving gear 21 is a sector gear. When the sector gear drives the main shaft 19 to rotate, the two ends of the sector gear correspond to the closed and open positions of the main shaft 19. This arrangement limits the rotation range of the main shaft 19, preventing excessive travel when the main shaft 19 is open. In addition, the sector gear occupies less space, making the structure of the disconnecting switch more compact. In other embodiments, the power receiving gear 21 can also be a circular gear, which can also realize the opening and closing of the main shaft 19 during rotation.

[0034] In a preferred embodiment of this utility model, the spindle 19 passes through the upper dust cover 6 and the lower dust cover 7 in sequence. An upper sealing ring 22 is provided between the upper dust cover 6 and the spindle 19, and a lower sealing ring 23 is provided between the lower dust cover 7 and the spindle 19. Both sealing rings are used to seal the connection between the dust cover and the spindle 19 to prevent the lubricating oil in the lubrication cavity from leaking from the connection between the dust cover and the spindle 19.

[0035] The oil replenishment process of the disconnect switch base of this utility model is as follows: In order to prevent the upper bearing 2 or the lower bearing 3 from rusting and getting stuck and unable to rotate, it is necessary to replenish the lubrication cavity where the upper bearing 2 and the lower bearing 3 are located regularly. Specifically, oil can be replenished into the lubrication cavity using a grease gun. The nozzle of the grease gun is connected to the grease nipple 10, so that the lubricating oil enters the grease injection line 11 along the grease nipple 10, and then flows out of the grease injection line 11 and flows along the annular groove 12 on the partition until the lubrication cavity is filled, thus realizing the oil replenishment and lubrication of the bearing in the lubrication cavity.

[0036] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. The patent protection scope of the present utility model shall be determined by the claims. Similarly, any equivalent structural changes made based on the description and drawings of the present utility model shall also be included within the protection scope of the present utility model.

Claims

1. A disconnector switch base, comprising a main shaft and an outer bushing with an upper bearing and a lower bearing fixedly mounted inside, the main shaft passing through the outer bushing and through the inner rings of the upper and lower bearings, characterized in that: The outer bushing is provided with an upper partition and a lower partition at intervals. An upper dust cover is provided above the upper partition and together with the upper dust cover forms an upper lubrication cavity. A lower dust cover is provided below the lower partition and together with the lower dust cover forms a lower lubrication cavity. The upper bearing is located in the upper lubrication cavity and the lower bearing is located in the lower lubrication cavity. An oil injection nozzle is provided on the outside of the outer bushing. The oil injection nozzle is connected to an oil injection pipeline. The oil injection pipeline is arranged between the upper partition and the lower partition and communicates with the corresponding lubrication cavity to deliver lubricating oil to lubricate the corresponding bearing. The oil injection pipeline and the corresponding partition are all sealed.

2. The disconnector switch base according to claim 1, characterized in that: The upper partition plate near the upper bearing and the lower partition plate near the lower bearing are both provided with annular grooves. The oil injection pipeline leads to the annular grooves of the corresponding partition plates, and the annular grooves form the flow path of the lubricating oil.

3. The disconnector switch base according to claim 2, characterized in that: The oil injection pipeline includes an independent upper pipeline and a lower pipeline. The upper pipeline is connected to the upper lubrication chamber, and the lower pipeline is connected to the lower lubrication chamber. Each of the upper and lower pipelines is connected to an oil injection nozzle.

4. The disconnector switch base according to claim 3, characterized in that: A check valve is installed inside the oil injection nozzle.

5. The disconnector base according to claim 1, characterized in that: The lower end face of the outer bushing is provided with a lower dust cover snap-in groove, and the lower dust cover is installed in the lower dust cover snap-in groove.

6. The disconnector switch base according to claim 1, characterized in that: A support cylinder section is provided between the upper and lower partitions. The diameter of the support cylinder section is smaller than the diameter of the upper and lower partitions. The support cylinder section divides the space between the upper and lower partitions into an inner cavity and an outer cavity, and the oil injection pipeline is laid in the outer cavity.

7. The disconnector switch base according to any one of claims 1-6, characterized in that: One end of the main shaft is fixed with a flange for fixed connection with an insulating porcelain bottle, and the other end is connected to a power receiving gear that drives the main shaft to rotate.

8. The disconnector base according to claim 7, characterized in that: The power receiving gear is connected to the main shaft via a key. The end of the main shaft near the power receiving gear is provided with a threaded section, and a fixing bolt is threadedly connected to the threaded section to fix the power receiving gear.

9. The disconnector switch base according to claim 7, characterized in that: The power receiving gear is a sector gear.

10. The disconnector switch base according to claim 7, characterized in that: The main shaft passes through the upper dust cover and the lower dust cover in sequence. An upper sealing ring is provided between the upper dust cover and the main shaft, and a lower sealing ring is provided between the lower dust cover and the main shaft.

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