A low-oil circuit breaker with reduced wear

Abstract

The utility model discloses a low-oil circuit breaker with reduced wear, belongs to the field of circuit breaker equipment, and specifically relates to a low-oil circuit breaker, comprising a low-oil circuit breaker, an oil drain hole, an oil drain bolt assembly, a fastening threaded hole, a sealing cavity, an oil drain through hole, an oil drain bolt, a blocking slide block, a rotating groove, a rotating block, a connecting rod, an operating hole, a sealing pad, and a sealing ring; through the design of the oil drain bolt and the blocking slide block, the problem that the traditional oil drain bolt has a long twisting distance during disassembly, which easily causes wear and affects the sealing effect is reduced; at the same time, the design of the sealing pad on the blocking slide block and the sealing ring on the oil drain bolt improves the sealing performance of the oil drain hole and reduces the possibility of oil leakage.

Description

Technical Field

[0001] The utility model belongs to the field of circuit breaker equipment, and specifically relates to a low-oil circuit breaker. Background Art

[0002] Low-oil circuit breakers refer to circuit breakers that use transformer oil or special circuit breaker oil as the insulation and arc extinguishing medium between contacts, and solid insulation for ground insulation. At present, when a low-oil circuit breaker needs to drain oil, it is necessary to unscrew the drain bolt at the bottom of the low-oil circuit breaker and drain the oil directly through the drain hole. Each time the oil is drained, the drain bolt needs to be completely unscrewed. The drain bolt is long and has a deep thread, so each time the drain bolt is unscrewed, it requires strong operation and a long twisting stroke. After long-term use, the surface of the drain bolt is prone to damage, which reduces the sealing of the low-oil circuit breaker, resulting in oil leakage, reducing the service life of the drain bolt, and easily causing safety problems.

[0003] Therefore, there is an urgent need for a technology to solve the above problems in the prior art. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a device for solving the problems existing in the background technology.

[0005] A low-oil circuit breaker with reduced wear, comprising a low-oil circuit breaker, characterized in that: an oil drain hole and an oil drain bolt assembly are provided at the bottom of the low-oil circuit breaker;

[0006] The oil drain hole comprises a fastening threaded hole, a sealing cavity and an oil drain through hole, wherein the fastening threaded hole, the sealing cavity and the oil drain through hole are connected to each other; wherein the sealing cavity is in the shape of a cubic cavity; wherein the diameter of the oil drain through hole is smaller than the length of the short side of the sealing cavity, and the length of the long side of the sealing cavity is smaller than the diameter of the fastening threaded hole;

[0007] The oil drain bolt assembly comprises an oil drain bolt, a blocking slider and a sealing gasket;

[0008] The oil drain bolt, the sealing slider and the sealing gasket are connected in sequence, wherein the connection mode between the oil drain bolt and the sealing slider is a rotational connection; the oil drain bolt matches the fastening threaded hole; the shape of the sealing slider matches the sealing cavity; the shape of the sealing gasket matches the shape of the oil drain through hole.

[0009] A rotating groove is arranged on the top of the oil drain bolt, the outlet end of the rotating groove is tightened, and a rotating block is arranged in the rotating groove, and the rotating block is connected with the blocking sliding block through a connecting rod.

[0010] A sealing ring is arranged at the end of the oil drain bolt.

[0011] An operating hole is provided on the nut of the oil drain bolt.

[0012] The length of the oil drain bolt is smaller than the blocking slider.

[0013] By adopting the above technical scheme, the beneficial effects achieved by the utility model are as follows: through the design of the oil drain bolt and the sealing slider, the problem of the traditional type of oil drain bolt having a long twisting distance during disassembly, which easily causes wear and affects the sealing effect, is reduced; at the same time, the design of the sealing gasket on the sealing slider and the sealing ring on the oil drain bolt improves the sealing performance of the oil drain hole and reduces the possibility of oil leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments:

[0015] Figure 1 It is a cross-sectional view of the utility model;

[0016] Figure 2 It is a cross-sectional view of the low-oil circuit breaker of the utility model;

[0017] Figure 3 It is a schematic diagram of the assembly of the oil drain bolt and the blocking slide block of the utility model;

[0018] Figure 4 for Figure 1 A partial enlarged view of the middle A area;

[0019] In the figure: 10-low-oil circuit breaker, 11-fastening threaded hole, 13-sealed chamber, 14-oil drain hole, 16-oil drain bolt, 18-blocking slider, 19-rotation groove, 20-rotation block, 21-connecting rod, 22-operating hole, 23-sealing pad, 24-sealing ring. DETAILED DESCRIPTION

[0020] The present application is further described with reference to the accompanying drawings:

[0021] A low-oil circuit breaker with reduced wear, comprising a low-oil circuit breaker 10, wherein: an oil drain hole and an oil drain bolt assembly are provided at the bottom of the low-oil circuit breaker 10;

[0022] The oil drain hole comprises a fastening threaded hole 11, a sealing cavity 13 and an oil drain through hole 14, wherein the fastening threaded hole 11, the sealing cavity 13 and the oil drain through hole 14 are connected to each other; wherein the sealing cavity 13 is in the shape of a cubic cavity; wherein the diameter of the oil drain through hole 14 is smaller than the length of the short side of the sealing cavity 13, and the length of the long side of the sealing cavity 13 is smaller than the diameter of the fastening threaded hole 11;

[0023] The oil drain bolt assembly includes an oil drain bolt 16, a blocking slider 18 and a sealing gasket 23;

[0024] The oil drain bolt 16, the blocking slider 18 and the sealing gasket 23 are connected in sequence, wherein the connection mode of the oil drain bolt 16 and the blocking slider 18 is a rotational connection; the oil drain bolt 16 matches the fastening threaded hole 11; the shape of the blocking slider 18 matches the sealing cavity 13; the shape of the sealing gasket 23 matches the shape of the oil drain through hole 14.

[0025] A rotating groove 19 is provided on the top of the oil drain bolt 16 . The outlet end of the rotating groove 19 is tightened, and a rotating block 20 is provided in the rotating groove 19 . The rotating block 20 is connected to the blocking slider 18 through a connecting rod 21 .

[0026] A sealing ring 24 is disposed at the end of the oil drain bolt 16 .

[0027] An operating hole 22 is formed on the nut of the oil drain bolt 16 .

[0028] A fastening threaded hole 11 is provided at the bottom end of the low-oil circuit breaker 10, a sealing cavity 13 is provided at the middle position of the top inner wall surface of the fastening threaded hole 11, an oil drain hole 14 is provided through the center position of the top inner wall surface of the sealing cavity 13, and the oil drain bolt 16 includes a nut and a screw rod, the bottom end of the nut is fixedly connected to the top end of the screw rod, and the top end of the screw rod is rotatably connected to a blocking slider 18 for blocking the oil drain hole 14;

[0029] A rotating groove 19 is provided at the center position of the top wall of the oil drain bolt 16, and a rotating block 20 is rotatably connected inside the rotating groove 19. A connecting rod 21 is fixedly connected to the center position of the top wall of the rotating block 20. The top end of the connecting rod 21 extends to the outside of the rotating groove 19 and is fixedly connected to the corresponding position of the bottom end of the blocking slider 18. The length of the oil drain bolt 16 is less than the length of the blocking slider 18. The oil drain bolt 16 is installed inside the fastening threaded hole 11. The inner circumferential side wall surface of the fastening threaded hole 11 is provided with an internal thread. The circumferential side wall surface of the oil drain bolt 16 is provided with an external thread that matches the internal thread. The oil drain bolt 16 is threadedly connected with the internal thread inside the fastening threaded hole 11 through the external thread.

[0030] The blocking slider 18 is slidably inserted in the sealing cavity 13, and the top wall surface of the blocking slider 18 is in contact with the top inner wall surface of the sealing cavity 13. The sealing cavity 13 and the blocking slider 18 are both rectangular and compatible. The inner wall surface of the sealing cavity 13 is in contact with the outer wall surface of the blocking slider 18. A sealing gasket 23 is connected to the top end of the blocking slider 18, and the top wall surface of the sealing gasket 23 is in contact with the top inner wall surface of the sealing cavity 13. A sealing ring 24 is sleeved on the bottom end of the oil drain bolt 16, and the upper end of the sealing ring 24 is in contact with the corresponding position of the bottom end of the low-oil circuit breaker 10, and the bottom end of the sealing ring 24 is in contact with the corresponding position of the top end of the nut of the oil drain bolt 16. An operating hole 22 is provided at the center of the bottom wall surface of the nut of the oil drain bolt 16.

[0031] The length of the oil drain bolt 16 is smaller than the blocking slider 18, and the length of the threaded section of the oil drain bolt 16 is reduced by the combination of the oil drain bolt 16 and the blocking slider 18;

[0032] By combining the blocking slider 18 with the drain bolt 16, the problem that the drain bolt of the traditional type has a long screwing distance when being disassembled, which easily causes wear and affects the sealing effect is reduced.

[0033] The rotating block 20 is connected to the blocking slider 18 through the connecting rod 21. The rotating block 20 rotates in the rotating groove 19, so that the oil drain bolt 16 is rotatably connected to the blocking slider 18.

[0034] The drain bolt screw 16 is threadedly connected with the internal thread inside the fastening threaded hole 11 through the external thread;

[0035] The top wall surface of the sealing gasket 23 is in close contact with the top inner wall surface of the sealing cavity 13, so as to achieve the effect of sealing the oil drain hole 14 and the sealing cavity 13;

[0036] The upper end of the sealing ring 24 is in close contact with the corresponding position of the bottom end of the oil-reduced circuit breaker body 10, and the bottom end of the sealing ring 24 is in close contact with the corresponding position of the nut of the bolt screw 16;

[0037] When the oil-reduced circuit breaker 10 needs to be drained, the nut of the drain bolt 16 is screwed through the wrench connection operation hole 22 , and the drain bolt 16 drives the blocking slider 18 to move downward out of the oil drain hole of the oil-reduced circuit breaker 10 .

[0038] During this process, since the blocking slider 18 and the oil drain bolt screw 16 are rotationally connected and the blocking slider 18 is in the shape of a rectangular parallelepiped, the blocking slider 18 will not rotate synchronously with the oil drain bolt screw 16 during the downward movement, but will slide downward directly, thereby reducing the wear of the blocking slider 18. When the oil draining operation of the low-oil circuit breaker 10 is completed, the blocking slider 18 is first inserted into the sealing cavity 13 through the fastening threaded hole 11, and then the oil drain bolt screw 16 is screwed into the fastening threaded hole 11 for threaded connection.

[0039] The above operation is simple and convenient, wherein the blocking slider 18 is responsible for blocking the oil drain hole 14, and the oil drain bolt 16 is responsible for fixing the blocking slider 18. Therefore, the wear of the oil drain bolt 16 will not affect the overall sealing of the low-oil circuit breaker 10, and the blocking slider 18 is less worn during use, which prolongs the service life of the equipment and improves the practicality of the equipment; the sealing gasket 23 increases the sealing effect between the top of the blocking slider 18 and the top inner wall of the sealing cavity 13 by deformation, and also reduces the wear on the top of the blocking slider 18, further extending the service life of the equipment; the sealing ring 24 improves the connection between the top of the nut of the oil drain bolt 16 and the bottom of the low-oil circuit breaker 10 by deformation, thereby improving the stability of the equipment structure.

[0040] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. The technicians in this industry should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model will have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A low-oil circuit breaker with reduced wear, comprising a low-oil circuit breaker (10), characterized in that: The inner bottom of the low-oil circuit breaker (10) is provided with an oil drain hole and an oil drain bolt assembly; The oil drain hole comprises a fastening threaded hole (11), a sealing cavity (13) and an oil drain through hole (14), wherein the fastening threaded hole (11), the sealing cavity (13) and the oil drain through hole (14) are connected to each other; wherein the sealing cavity (13) is in the shape of a cubic cavity; wherein the diameter of the oil drain through hole (14) is smaller than the length of the short side of the sealing cavity (13), and the length of the long side of the sealing cavity (13) is smaller than the diameter of the fastening threaded hole (11); The oil drain bolt assembly comprises an oil drain bolt (16), a blocking slider (18) and a sealing gasket (23); The oil drain bolt (16), the blocking slider (18) and the sealing gasket (23) are connected in sequence, wherein the connection mode of the oil drain bolt (16) and the blocking slider (18) is a rotational connection; the oil drain bolt (16) matches the fastening threaded hole (11); the shape of the blocking slider (18) matches the sealing cavity (13); and the shape of the sealing gasket (23) matches the shape of the oil drain through hole (14).

2. The wear-reducing low-oil circuit breaker according to claim 1 is characterized in that: A rotating groove (19) is arranged at the top of the oil drain bolt (16), the outlet end of the rotating groove (19) is tightened, and a rotating block (20) is arranged in the rotating groove (19), and the rotating block (20) is connected to the blocking slider (18) through a connecting rod (21).

3. The wear-reducing low-oil circuit breaker according to claim 1 is characterized in that: A sealing ring (24) is provided at the end of the oil drain bolt (16).

4. The wear-reducing low-oil circuit breaker according to claim 1 is characterized by: An operating hole (22) is provided on the nut of the oil drain bolt (16).

5. The wear-reducing low-oil circuit breaker according to claim 1 is characterized by: The length of the oil drain bolt (16) is shorter than the blocking slide block (18).

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