Movable end assembly of switching device and switching device

Abstract

The invention provides a moving end assembly of a switch device and the switch device, and belongs to the field of high-voltage switch equipment. A movable end assembly of the switch device comprises a lower conductive tube and a rotating seat installed at the end of the lower conductive tube, a pull rod is arranged in the lower conductive tube, a receding hole for one end of the pull rod to extend out of the conductive rod is formed in the rotating seat, and the movable end assembly of the switch device further comprises an elastic pressing piece which is arranged in the lower conductive tube and is in a compressed state when used. The end, close to the rotating base, of the elastic pressing piece is provided with an anti-bird body which is in abutting fit with the elastic pressing piece and used for blocking the gap between the avoiding hole wall and the pull rod. The switch device comprises the moving end assembly. The elastic pressing piece is arranged in the conductive tube, the gap between the wall of the avoiding hole and the pull rod is blocked through the blocking part of the elastic pressing piece or the anti-bird body matched with the elastic pressing piece in an ejecting and pressing mode, birds are prevented from entering the lower conductive tube through the avoiding hole, and normal work of the movable end assembly is not hindered.

Description

Technical Field

[0001] The present invention belongs to the field of high-voltage switchgear, and particularly relates to a moving-end assembly of a switching device and a switching device. Background Art

[0002] The folding and insertable switching device includes a static contact, a moving-end assembly, and a moving contact disposed on the top of the moving-end assembly. The moving-end assembly further includes a base and a two-end folding conductive arm mounted on the base through a lower conductive tube. Refer to the attached Figure 1 and attached Figure 2 , a rotating seat 2 is fixedly provided at the end of the lower conductive tube 4, the rotating seat 2 is hinged to the base 1 through a first rotating shaft 5, a pull rod 3 is disposed inside the lower conductive tube 4, an avoidance hole 7 for avoiding the pull rod 3 is formed on the rotating seat 2, one end of the pull rod 3 extends out of the lower conductive tube 4 through the avoidance hole 7 and is fixedly connected with a second rotating shaft 6 that is rotationally matched with the base, and the pull rod 3 is hinged to the base 1 through the second rotating shaft 6.

[0003] Since the hinge point between the pull rod and the base is different from the hinge point between the lower conductive tube and the base, when the lower conductive tube rotates, the pull rod can axially move relative to the lower conductive tube, thereby driving the conductive arm to fold. While the lower conductive tube rotates, the pull rod and the lower conductive tube also generate radial relative movement, so the size of the avoidance hole needs to be larger than the cross-sectional size of the pull rod.

[0004] A relatively large gap will be formed between the wall of the avoidance hole and the pull rod. When the outdoor switching device is in use, birds often enter the lower conductive tube through this gap to build nests and inhabit. The flammable substances and other foreign objects carried by the birds into the lower conductive tube will damage the internal structure of the lower conductive tube, making the switching device unable to switch on and off normally. Summary of the Invention

[0005] One object of the present invention is to provide a moving-end assembly of a switching device to solve the technical problem that in the prior art, the end of the lower conductive tube of the outdoor switching device near the base is an open structure, resulting in birds easily entering the lower conductive tube during outdoor use and thus affecting the normal operation of the switching device.

[0006] Another object of the present invention is to provide a switching device to solve the above technical problem.

[0007] To achieve the above object, the technical solution of the moving-end assembly of the switching device provided by the present invention is:

[0008] The moving end assembly of a switch device includes a lower conductive tube and a rotating seat installed at the end of the lower conductive tube. A pull rod is arranged inside the lower conductive tube. An avoidance hole for one end of the pull rod to extend out the conductive rod is formed on the rotating seat. The moving end assembly of the switch device further includes an elastic pressing member arranged inside the lower conductive tube and in a compressed state during use. One end of the elastic pressing member away from the rotating seat is fixed relative to the pull rod or relative to the lower conductive tube. One end of the elastic pressing member close to the rotating seat is provided with an anti-bird body that is in top pressure cooperation with the elastic pressing member and used to block the gap between the avoidance hole wall and the pull rod. The anti-bird body is in sliding cooperation with the rotating seat.

[0009] As a further improvement, a top pressure member is fixedly arranged on the inner side of the lower conductive tube or on the pull rod. One end of the elastic pressing member away from the rotating seat is in top pressure cooperation with the top pressure member.

[0010] As a further improvement, the top pressure member is a top pressure ring. The top pressure ring is sleeved on the pull rod and fixedly connected to the pull rod.

[0011] As a further improvement, the anti-bird body includes a sealing ring sleeved on the pull rod. The sealing ring is in clearance fit with the pull rod.

[0012] As a further improvement, the anti-bird body further includes an annular gasket. The gasket is located between the sealing ring and the rotating seat. The outer diameter of the gasket is larger than the outer diameter of the sealing ring. The inner diameter of the gasket is larger than the inner diameter of the sealing ring and smaller than the outer diameter of the sealing ring.

[0013] The beneficial effect of the moving end assembly of the switch device in the present invention is that the moving end assembly of the switch device is an improvement over the prior art. By arranging an elastic pressing member inside the conductive tube and using the anti-bird body in top pressure cooperation with the elastic pressing member to block the gap between the avoidance hole wall and the pull rod, on the one hand, since the elastic pressing member is always in a compressed state during use, it is ensured that the anti-bird body can tightly abut against the rotating seat before and after the axial movement of the pull rod and the rotating seat, ensuring the sealing effect and preventing birds from entering. On the other hand, since the anti-bird body can move radially relative to the rotating seat, it can allow the radial relative movement between the pull rod and the rotating seat, ensuring the normal operation of the moving end assembly of the switch device.

[0014] To achieve the above object, the technical solution of the switch device provided by the present invention is:

[0015] A switching device includes a moving-end component. The moving-end component includes a lower conductive tube and a rotating seat installed at the end of the lower conductive tube. A pull rod is arranged inside the lower conductive tube. An avoidance hole for one end of the pull rod to extend out the conductive rod is provided on the rotating seat. The moving-end component further includes an elastic pressing member arranged inside the lower conductive tube and in a compressed state during use. One end of the elastic pressing member away from the rotating seat is fixed relative to the pull rod or relative to the lower conductive tube. One end of the elastic pressing member close to the rotating seat is provided with an anti-bird body that is in top-pressure cooperation with the elastic pressing member and is used to block the gap between the wall of the avoidance hole and the pull rod. The anti-bird body is in sliding cooperation with the rotating seat.

[0016] As a further improvement, a pressing member is fixedly arranged on the inner side of the lower conductive tube or on the pull rod. One end of the elastic pressing member away from the rotating seat is in top-pressure cooperation with the pressing member.

[0017] As a further improvement, the pressing member is a pressing ring. The pressing ring is sleeved on the pull rod and fixedly connected to the pull rod.

[0018] As a further improvement, the anti-bird body includes a sealing ring sleeved on the pull rod. The sealing ring is in clearance fit with the pull rod.

[0019] As a further improvement, the anti-bird body further includes an annular gasket. The gasket is located between the sealing ring and the rotating seat. The outer diameter of the gasket is larger than the outer diameter of the sealing ring. The inner diameter of the gasket is larger than the inner diameter of the sealing ring and smaller than the outer diameter of the sealing ring.

[0020] The beneficial effect of the moving-end component of the switching device in the present invention is as follows: This switching device is an improvement over the prior art. By arranging an elastic pressing member inside the conductive tube and using the anti-bird body in top-pressure cooperation with the elastic pressing member to block the gap between the wall of the avoidance hole and the pull rod, on the one hand, since the elastic pressing member is always in a compressed state during use, it is ensured that the anti-bird body can tightly abut against the rotating seat before and after the axial movement of the pull rod and the rotating seat, ensuring the sealing effect and preventing birds from entering. On the other hand, since the anti-bird body can move radially relative to the rotating seat, it can allow the radial relative movement between the pull rod and the rotating seat, ensuring the normal operation of the moving-end component of this switching device. Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the moving-end component in the background technology of the present invention;

[0022] Figure 2 It is a schematic structural diagram of the moving-end component in the background technology of the present invention after removing the lower conductive tube and the pull rod;

[0023] Figure 3 It is a schematic structural diagram of the moving-end component of the switching device in the present invention.

[0024] Description of the Reference Numerals:

[0025] 1. Base; 2. Rotating seat; 3. Pull rod; 4. Lower conductive tube; 5. First rotating shaft; 6. Second rotating shaft; 7. Avoidance hole; 8. Pressing ring; 9. Spring; 10. Sealing ring; 11. Gasket. Specific implementation manner

[0026] The present invention will be further described in detail below in conjunction with embodiments.

[0027] By arranging an elastic pressing member in the conductive tube, the present invention uses a bird prevention body that presses and cooperates with the elastic pressing member to seal the gap between the wall of the avoidance hole and the pull rod, preventing birds from entering the lower conductive tube through the avoidance hole, and not interfering with the normal operation of the moving end assembly.

[0028] Specific embodiment of the moving end assembly of the switch device provided by the present invention:

[0029] A moving end assembly of a switch device, see the attached Figure 3 , including a base 1, a rotating seat 2, a conductive arm and a pull rod 3. The conductive arm is composed of an upper conductive tube and a lower conductive tube 4. The specific structure of the conductive arm is the prior art and will not be elaborated here.

[0030] A first rotating shaft 5 and a second rotating shaft 6 are rotatably arranged on the base 1. The rotating seat 2 is rotatably matched with the first rotating shaft 5. One end of the pull rod 3 is fixedly connected to the second rotating shaft 6 through a bolt. One end of the lower conductive tube 4 is fixedly connected to the rotating seat 2 through a bolt. An avoidance hole 7 for the pull rod 3 to pass through is formed on the rotating seat 2, and the avoidance hole 7 is a kidney-shaped hole. The width of the avoidance hole 7 is equal to the diameter of the pull rod 3. One end of the pull rod 3 away from the second rotating shaft 6 can enter the lower conductive tube 4 through the avoidance hole 7.

[0031] An elastic pressing member and a pressing member that presses and cooperates with the end of the elastic pressing member away from the rotating seat 2 are arranged in the lower conductive tube 4. In this embodiment, the elastic pressing member is a spring 9 sleeved on the pull rod 3, and the pressing member is a pressing ring 8 sleeved on the pull rod 3 and welded and fixed to the pull rod 3. One end of the spring 9 away from the rotating seat 2 presses and cooperates with the pressing ring 8.

[0032] A bird prevention body is arranged at one end of the spring 9 close to the rotating seat 2. The bird prevention body includes a sealing ring 10 sleeved on the pull rod 3 and an annular gasket 11. The sealing ring 10 directly presses and cooperates with the spring 9, and the gasket 11 is located between the sealing ring 10 and the spring 9.

[0033] The sealing ring 10 is in clearance fit with the pull rod 3 so that the pull rod 3 can axially move relative to the sealing ring 10. The outer diameter of the gasket 11 is greater than the length of the avoidance hole 7 and also greater than the outer diameter of the sealing ring 10. The inner diameter of the gasket 11 is less than the outer diameter of the sealing ring 10 but greater than the inner diameter of the sealing ring 10.

[0034] When the earthing switch is in the closed state, the spring 9 is in a pre-compressed state. Under the top pressure of the spring 9, the sealing ring 10 is in close contact with the gasket 11, and the gasket 11 is in close contact with the rotating seat 2, so that the gap between the hole wall of the avoidance hole 7 and the pull rod 3 is always sealed. When the earthing switch is opened, the pull rod 3 moves outward relative to the lower conductive tube 4, so that the compression amount of the spring 9 increases, and the sealing ring 10 and the gasket 11 can still seal the gap between the hole wall of the avoidance hole 7 and the pull rod 3.

[0035] Since the pull rod 3 will also swing radially relative to the rotating seat 2, the sealing ring 10 will also move radially relative to the rotating seat 2 along with the pull rod 3. The gasket 11 can prevent the sealing ring 10 from directly contacting and rubbing against the rotating seat 2, ensure the smoothness of the radial movement of the sealing ring 10 along the rotating seat 2, and can also prevent the wear of the rotating seat 2 caused by long-term use.

[0036] In other embodiments, the bird prevention body can also have other forms. For example, the bird prevention body only includes a sealing ring, and the outer diameter of the sealing ring is greater than the length of the avoidance hole. In this embodiment, the sealing ring is directly in top pressure cooperation with the spring and also in top pressure cooperation with the rotating seat. In another embodiment, the sealing ring can also be directly welded and fixed to the spring. For another example, the bird prevention body is a sheet-shaped C-shaped part. Since the avoidance hole is a kidney-shaped hole, the C-shaped part can also seal the gap between the kidney-shaped hole wall and the pull rod.

[0037] In other embodiments, the elastic pressing member can also have other forms. For example, in one embodiment, the elastic pressing member is a rubber cylinder sleeved on the pull rod; for another example, in one embodiment, the elastic pressing member is a cylindrical rubber airbag sleeved on the pull rod.

[0038] In other embodiments, the top pressing member can also have other forms. For example, the top pressing member can be at least two top pressing blocks welded and fixed to the pull rod along the circumferential direction, and the top pressing blocks are in top pressure cooperation with the spring. For another example, the top pressing member can be not arranged on the pull rod but located inside the lower conductive tube. After the lower conductive tube is fixedly connected to the rotating seat, the elastic pressing member can be in a compressed state. In this embodiment, the top pressing member can also be annular or block-shaped, and in this embodiment, the elastic pressing member can be a spring or a rubber cylinder sleeved on the pull rod, or the elastic pressing member can be not sleeved on the pull rod but be springs or rubber blocks arranged in the conductive tube and evenly distributed along the circumferential direction of the conductive tube.

[0039] In other embodiments, the top pressing member can also be not provided. For example, the end of the spring far from the rotating seat is directly welded and fixed to the pull rod, or a protrusion is integrally formed on the pull rod to use the protrusion to top press the spring.

[0040] Specific embodiments of the switch device provided by the present invention:

[0041] The switching device includes a static contact, a moving end assembly, and a moving contact disposed at the end of the moving end assembly. The moving end assembly is the moving end assembly of the switching device in the embodiment of the moving end assembly of the above-mentioned switching device, which will not be elaborated herein.

[0042] Finally, it should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still make non-creative modifications to the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. The moving end assembly of a switching device, comprising a lower conductive tube and a rotating seat installed at the end of the lower conductive tube. A pull rod is arranged inside the lower conductive tube, and an avoidance hole for one end of the pull rod to extend out a conductive rod is formed on the rotating seat. It is characterized in that, The moving end assembly of the switch device further includes an elastic pressing member disposed in the lower conductive tube and in a compressed state during use. One end of the elastic pressing member away from the rotating seat is fixed relative to the pull rod or relative to the lower conductive tube. One end of the elastic pressing member close to the rotating seat is provided with an anti-bird body that is in top-pressure cooperation with the elastic pressing member and is used to block the gap between the wall of the avoidance hole and the pull rod. The anti-bird body is in sliding cooperation with the rotating seat.

2. The moving end assembly of the switching device according to claim 1, characterized in that, A top-pressure member is fixedly arranged on the inner side of the lower conductive tube or on the pull rod. One end of the elastic pressing member away from the rotating seat is in top-pressure cooperation with the top-pressure member.

3. The moving end assembly of the switching device according to claim 2, characterized in that, The top-pressure member is a top-pressure ring. The top-pressure ring is sleeved on the pull rod and fixedly connected to the pull rod.

4. The moving end assembly of the switching device according to any one of claims 1-3, characterized in that, The anti-bird body includes a blocking ring sleeved on the pull rod. The blocking ring is in clearance fit with the pull rod.

5. The moving end assembly of the switching device according to claim 4, characterized in that, The anti-bird body further includes an annular gasket. The gasket is located between the blocking ring and the rotating seat. The outer diameter of the gasket is larger than the outer diameter of the blocking ring. The inner diameter of the gasket is larger than the inner diameter of the blocking ring and smaller than the outer diameter of the blocking ring.

6. A switching device, comprising a moving end assembly. The moving end assembly includes a lower conductive tube and a rotating seat installed at the end of the lower conductive tube. A pull rod is arranged inside the lower conductive tube, and an avoidance hole for one end of the pull rod to extend out a conductive rod is formed on the rotating seat. It is characterized in that, The moving end assembly of the switch device further includes an elastic pressing member disposed in the lower conductive tube and in a compressed state during use. One end of the elastic pressing member away from the rotating seat is fixed relative to the pull rod or relative to the lower conductive tube. One end of the elastic pressing member close to the rotating seat is provided with an anti-bird body that is in top-pressure cooperation with the elastic pressing member and is used to block the gap between the wall of the avoidance hole and the pull rod. The anti-bird body is in sliding cooperation with the rotating seat.

7. The switching device according to claim 6, characterized in that, A top-pressure member is fixedly arranged on the inner side of the lower conductive tube or on the pull rod. One end of the elastic pressing member away from the rotating seat is in top-pressure cooperation with the top-pressure member.

8. The switching device according to claim 7, characterized in that, The top-pressure member is a top-pressure ring. The top-pressure ring is sleeved on the pull rod and fixedly connected to the pull rod.

9. The switching device according to any one of claims 6-8, characterized in that, The anti-bird body includes a blocking ring sleeved on the pull rod. The blocking ring is in clearance fit with the pull rod.

10. The switching device according to claim 9, characterized in that, The anti-bird body further includes an annular gasket. The gasket is located between the blocking ring and the rotating seat. The outer diameter of the gasket is larger than the outer diameter of the blocking ring. The inner diameter of the gasket is larger than the inner diameter of the blocking ring and smaller than the outer diameter of the blocking ring.

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