Isolating switch main shaft

Abstract

The utility model discloses a main shaft of an isolating switch. The main shaft comprises an insulating main shaft (1), an insulating contact knife sheath (2) and an insulating ring sheet (3), the insulating contact knife sheath (2) and the insulating ring sheet (3) are fixed on the insulating main shaft (1); the insulating contact knife is characterized in that the insulating main shaft (1), the insulating contact knife sheath (2) and the insulating ring sheet (3) are integrally formed by insulating materials. According to the utility model, the insulating main shaft, the insulating contact knife sheath and the insulating ring sheet are integrally made of insulating materials, and especially when the insulating main shaft, the insulating contact knife sheath and the insulating ring sheet are made of high-hardness and high-strength materials, the advantages of high overall structural strength and difficulty in deformation can be obtained.

Description

Technical Field

[0001] This utility model relates to the technical field of disconnect switches for gas-filled switchgear, and specifically to a disconnect switch spindle. Background Technology

[0002] Gas-insulated switchgear combines air insulation with a sulfur hexafluoride gas compartment, making it both compact and expandable, suitable for power distribution automation. Featuring a compact structure, flexible operation, and reliable interlocking, gas-insulated switchgear is suitable for various applications, especially harsh environments. It is widely used in small secondary substations, switching stations, prefabricated substations, residential communities, industrial and mining enterprises, and large shopping malls, and is particularly suitable for airports, subways, railways, and other applications with high power requirements.

[0003] Patent document CN213459546U discloses a universal gas-insulated switchgear moving contact device. Its three moving contact assemblies are mounted on the switch spindle via three insulating sleeves. Depending on the size of the gas-insulated switchgear, the insulating sleeves and adjusting sleeves are sequentially and alternately fitted onto the switch spindle. By setting adjusting sleeves between adjacent insulating sleeves, the three insulating sleeves can be sequentially and equidistantly spaced, thereby adjusting the installation spacing between the three insulating sleeves. For different specifications and models of gas-insulated switchgear, simply increasing or decreasing the number of adjusting sleeves will allow the installation spacing of the moving contact assemblies to meet the installation requirements of the gas-insulated switchgear.

[0004] The shortcomings of this moving contact knife device are: it adopts an adjustable distance split design, which has the disadvantages of insufficient overall structural strength, low overall rigidity, and easy deformation at the adjacent parts of each insulating component. Its structure still needs to be improved. Utility Model Content

[0005] The purpose of this invention is to provide a disconnect switch spindle with high overall structural strength, high rigidity, and resistance to deformation.

[0006] The technical solution to achieve the purpose of this utility model is: a disconnector switch spindle, comprising an insulating spindle, an insulating contact blade sleeve, and an insulating ring; the insulating contact blade sleeve and the insulating ring are fixed on the insulating spindle; the insulating spindle, the insulating contact blade sleeve, and the insulating ring are integrally formed from insulating material.

[0007] Preferably, the insulating material is ceramic, polytetrafluoroethylene, polyimide, silicon carbide, carbon fiber composite material, or ceramic fiber composite material. Disconnecting switch spindles made from these materials possess sufficient hardness, strength, and rigidity, while also exhibiting excellent insulation properties. Further preferred are ceramic or ceramic fiber composite materials.

[0008] Preferably, one end of the insulated spindle is provided with a hexagonal blind hole along the central axis as a spindle hole.

[0009] The insulated spindle is equipped with three insulated contact blade sleeves, each with an anti-creep section on both sides, and each anti-creep section includes two insulating rings. The insulated contact blade sleeves provide excellent insulation protection for the contacts installed within them.

[0010] Preferably, each anti-creep component further includes a snap-fit ​​boss protruding from the insulating main shaft, located between two insulating rings. The height of the two insulating rings is higher than the snap-fit ​​boss, providing better insulation protection for the snap-fit ​​boss located therebetween.

[0011] Preferably, the outer end of the snap-fit ​​boss is semi-circular, which can effectively reduce partial discharge.

[0012] Preferably, a central hole is provided at the center of the outer end of the snap-fit ​​boss, which can be used to fasten external components or to snap-fit ​​with external components.

[0013] Preferably, the insulating spindle is provided with multiple mounting bosses, each mounting boss having a mounting hole at its center. These mounting holes are radially arranged along the insulating spindle and are directly opposite one of the central holes. These mounting holes can be used to mount and fix related components. Since each mounting hole is located between two adjacent insulating rings, it provides excellent insulation and protection.

[0014] Preferably, each insulating contact blade sheath includes an installation tube and multiple support plates, with each support plate located on the side of the installation tube close to the insulating spindle; the installation tube is integrally connected to the insulating spindle, and each support plate is integrally connected to both the installation tube and the insulating spindle.

[0015] Each support plate is perpendicular to the insulating spindle; the insulating spindle passes through the middle of each support plate and is integrally connected to it. The outer edge of each support plate protrudes above the outer wall of the insulating spindle, forming an anti-creeping protrusion. This anti-creeping plate not only prevents creepage but also increases the connection area with the insulating spindle, resulting in better overall structural reinforcement.

[0016] This utility model has positive effects:

[0017] (1) This utility model achieves the advantages of high overall structural strength and resistance to deformation by using insulating materials to integrally form an insulating spindle, insulating contact blade sheath and insulating ring plate, especially by using high hardness and high strength ceramic, polytetrafluoroethylene, polyimide, silicon carbide, carbon fiber composite material or ceramic fiber composite material. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0019] Figure 2 for Figure 1 A three-dimensional structural diagram of the main shaft of the disconnector switch from another angle;

[0020] Figure 3 for Figure 1 The front view of the main shaft of the disconnector switch shown;

[0021] Figure 4 for Figure 3 The diagram shows the AA view of the main shaft of the disconnector switch.

[0022] The attached diagram shows the following markings: Insulated spindle 1, blind hole 11, insulated contact blade sleeve 2, anti-creep part 21, mounting tube 22, support plate 23, anti-creep protrusion 231, insulating ring 3, snap-fit ​​boss 4, and center hole 41. Detailed Implementation

[0023] (Example 1)

[0024] This embodiment is a disconnector switch spindle, see Figures 1 to 4 As shown, the device includes an insulating spindle 1, an insulating contact sleeve 2, and an insulating ring 3. The insulating contact sleeve 2 and the insulating ring 3 are fixed to the insulating spindle 1. The insulating spindle 1, the insulating contact sleeve 2, and the insulating ring 3 are integrally molded from ceramic. In practice, high-hardness and high-strength insulating materials can be selected. Materials with better performance include ceramics, polytetrafluoroethylene (PTFE), polyimide, silicon carbide, carbon fiber composites, or ceramic fiber composites. Spindles made from these materials have sufficient hardness, strength, and rigidity, while also possessing excellent insulation properties. Further preferred materials are ceramics or ceramic fiber composites.

[0025] One end of the insulated spindle 1 has a hexagonal blind hole 11 along the central axis as a spindle hole. When in use, the metal spindle is inserted into the blind hole 11. Since the metal spindle does not protrude from the other side of the insulated spindle 1, this structure forms a semi-enclosed state for the metal spindle, thereby playing a better role in insulation and protection.

[0026] The insulating spindle 1 is equipped with three insulating contact sleeves 2. Each insulating contact sleeve 2 has an anti-creep part 21 on both sides, and each anti-creep part 21 includes two insulating rings 3. In use, the metal contact is installed in the insulating contact sleeve 2, with only both ends of the metal contact protruding from the insulating contact sleeve 2, thus providing good insulation protection.

[0027] Each anti-creep part 21 also includes a snap-fit ​​boss 4 protruding from the insulating main shaft 1, which is located between the two insulating rings 3. The height of the two insulating rings 3 is higher than that of the snap-fit ​​boss 4, thereby providing better insulation protection for the snap-fit ​​boss 4 located therebetween.

[0028] The outer end of the snap-fit ​​boss 4 is semi-circular, and this structure can effectively reduce partial discharge.

[0029] The center of the outer end of the snap-fit ​​boss 4 is provided with a central hole 41, which can be used to fasten external components or to make snap-fit ​​connections with external components. In addition, since the outer end of the snap-fit ​​boss 4 is semi-circular, the snap-fit ​​boss 4 itself can also be used as a snap-fit ​​position when snap-fitting. For example, if the insulating connecting rod is provided with a slot that fits this semi-circle, the insulating connecting rod can be snapped onto the outer end of the semi-circular snap-fit ​​boss 4 through its slot.

[0030] The insulating spindle 1 is provided with multiple mounting bosses 42, each mounting boss 42 having a mounting hole 421 at its center. Each mounting hole 421 is radially arranged along the insulating spindle 1 and is directly opposite a central hole 41. If necessary, the mounting hole 421 and its corresponding central hole 41 can be used together. The mounting hole 421 can be used to install and fix related components. Since each mounting hole 421 is located between two adjacent insulating rings 3, the height of the mounting boss 42 can extend beyond the outer end of the fastener located in the mounting hole, thus providing excellent insulation protection for the fastener.

[0031] Each insulating contact blade sheath 2 includes an installation tube 22 and multiple support plates 23, with each support plate 23 located on the side of the installation tube 22 close to the insulating spindle 1; the installation tube 22 is integrally connected to the insulating spindle 1, and each support plate 23 is integrally connected to the installation tube 22 and the insulating spindle 1.

[0032] Each support plate 23 is perpendicular to the insulating spindle 1. The insulating spindle 1 passes through the middle of each support plate 23 and is integrally connected. The outer edge of each support plate 23 protrudes above the outer wall of the insulating spindle 1, forming an anti-creep protrusion 231. This design enhances the anti-creep coordination. By adding this protruding anti-creep protrusion 231, the path that leakage current needs to "climb" is lengthened, like setting a speed bump for the current to prevent leakage along the surface. In addition, the protruding part of the anti-creep protrusion 231 not only increases the connection points with the insulating spindle 1, but also enhances the overall structural strength like a reinforcing rib.

[0033] In this embodiment, the entire disconnector spindle is made of integrally molded ceramic, with all components completely fused together. By using insulating materials to integrally manufacture the insulating spindle 1, insulating contact sleeve 2, and insulating ring 3, high strength, high rigidity, and high insulation performance are ensured. The effect is even better when using high-hardness, high-strength ceramics, polytetrafluoroethylene, polyimide, silicon carbide, carbon fiber composites, or ceramic fiber composites.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A disconnector switch spindle, comprising an insulating spindle (1), an insulating contact sheath (2), and an insulating ring (3); wherein the insulating contact sheath (2) and the insulating ring (3) are fixed on the insulating spindle (1); characterized in that: The insulating spindle (1), insulating contact blade sheath (2) and insulating ring (3) are integrally molded from insulating material.

2. The disconnector spindle according to claim 1, characterized in that: The insulating material is ceramic, polytetrafluoroethylene, polyimide, silicon carbide, carbon fiber composite material or ceramic fiber composite material.

3. The disconnector switch spindle according to claim 1, characterized in that: The insulating spindle (1) has a hexagonal blind hole (11) on one side end along the central axis direction as the spindle hole.

4. The disconnector switch spindle according to claim 1, characterized in that: The insulating spindle (1) is provided with three insulating contact blade sleeves (2), and each insulating contact blade sleeve (2) has an anti-creep part (21) on both sides, and each anti-creep part (21) includes two insulating rings (3).

5. The disconnector switch spindle according to claim 4, characterized in that: Each of the anti-creep parts (21) also includes a snap-fit ​​boss (4) protruding from the insulating main shaft (1). The snap-fit ​​boss (4) is located between two insulating rings (3), and the height of the two insulating rings (3) is higher than that of the snap-fit ​​boss (4).

6. The disconnector spindle according to claim 5, characterized in that: The outer end of the snap-fit ​​boss (4) is semi-circular.

7. The disconnector switch spindle according to claim 6, characterized in that: A central hole (41) is provided at the center of the outer end of the snap-fit ​​boss (4).

8. The disconnector spindle according to claim 7, characterized in that: The insulating spindle (1) is provided with a plurality of mounting bosses (42), and each mounting boss (42) has a mounting hole (421) at its center. Each mounting hole (421) is arranged radially along the insulating spindle (1), and each mounting hole is positioned opposite a central hole (41).

9. The disconnector switch spindle according to claim 4, characterized in that: Each insulating contact blade sheath (2) includes an installation tube (22) and multiple support plates (23), each support plate (23) being located on the side of the installation tube (22) close to the insulating spindle (1); the installation tube (22) is integrally connected to the insulating spindle (1), and each support plate (23) is integrally connected to the installation tube (22) and the insulating spindle (1).

10. The disconnector spindle according to claim 9, characterized in that: Each support plate (23) is set perpendicular to the insulating spindle (1); the insulating spindle (1) passes through the middle of each support plate (23) and is integrally connected; the outer edge of each support plate (23) is higher than the outer wall of the insulating spindle (1) to form an anti-climbing protrusion (231).

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