Environment-friendly insulating main shaft for circuit breaker

Abstract

An environment-friendly insulating main shaft for a circuit breaker comprises a rotating shaft part, a rotating groove formed in the rotating shaft part and a swing shaft part, the swing shaft part is provided with an isolation channel communicated with the rotating groove, the swing shaft part is composed of a fixing part arranged on the rotating shaft part and an adjusting part located above the fixing part, and the lower end face of the adjusting part is attached to the upper end face of the fixing part; the isolation channel is composed of a lower channel located in the fixing part and an upper channel located in the adjusting part. A plurality of limiting holes which are uniformly distributed are formed in the upper end surface of the adjusting part; a lifting fixing structure is arranged in the limiting hole, and the lifting fixing structure can upwards move the adjusting part and fix the adjusting part; and an isolation pipe matched with the isolation channel is arranged in the isolation channel. According to the environment-friendly insulating main shaft for the circuit breaker, the length of the pendulum shaft part can be effectively changed according to actual requirements, and even if the lengths of the isolation knives are different, the isolation knives can be always wrapped inside, so that hidden dangers caused by the fact that electric arcs are lengthened are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of circuit breakers, and in particular to an environmentally friendly insulated spindle for circuit breakers. Background Technology

[0002] The environmentally friendly gas-insulated switchgear contains a circuit breaker. A circuit breaker is a switching device that can close, carry, and interrupt current under normal circuit conditions and close, carry, and interrupt current under abnormal circuit conditions within a specified time. The circuit breaker achieves its opening and closing action by rotating the isolating blade. In order to prevent the isolating blade from being exposed and drawing a long electric arc, it is wrapped by an insulated main shaft.

[0003] The invention application with application number "2022113999501.2" and invention title "An Environmentally Friendly Gas Insulated Switchgear" discloses the technical features of "the isolation main shaft including a rotating shaft part rotatably mounted on an insulating support, a rotating groove and a swing shaft part arranged circumferentially along the rotating shaft part, and an isolation channel communicating with the rotating groove in the swing shaft part, and one end of the isolation blade passing through the rotating groove and the isolation channel in sequence". The "isolation main shaft" is the "insulating main shaft" of this application. One end of the isolation blade passes through the rotating groove and the isolation channel in one pass, and the other end is hinged to the upper end of the solid-sealed pole. The isolation blade is located in the isolation channel. After being wrapped by the isolation main shaft, the insulation performance is good and the overall strength is higher. At the same time, the isolation main shaft is made of recyclable thermoplastic plastic in one injection molding, which is pollution-free. The isolation main shaft has three swing shaft parts to form a three-position switch, realizing the three functions of connecting the main circuit, opening and closing the ground.

[0004] However, in actual use, the length of the isolation blade will vary depending on the opening and closing requirements and the position of the stationary contact that matches the isolation blade. Since the isolation spindle is integrally injection molded, the length of the swing shaft with the isolation channel cannot be changed. As a result, when the length of the isolation blade exceeds the length of the swing shaft, the isolation blade will extend directly outside the isolation channel. This means that even though the isolation blade is wrapped by the swing shaft, a large part of it is still exposed, which can cause a long arc, making arc ignition unsafe and posing a safety hazard. Summary of the Invention

[0005] The present invention aims to solve the existing technical problem by providing an environmentally friendly insulated spindle for circuit breakers. It can effectively change the length of the swing shaft according to actual needs, and even if there are differences in the length of the isolation blade, it can always wrap the isolation blade inside, effectively avoiding the situation where the arc is stretched and causes hidden dangers.

[0006] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0007] This utility model discloses an environmentally friendly insulating spindle for circuit breakers, including a rotating shaft, a rotating groove on the rotating shaft, and a swing shaft. The swing shaft has an isolation channel communicating with the rotating groove. The swing shaft consists of a fixed part on the rotating shaft and an adjusting part located above the fixed part, with the lower end face of the adjusting part abutting against the upper end face of the fixed part. The isolation channel consists of a lower channel located within the fixed part and an upper channel located within the adjusting part. The upper end face of the adjusting part has several evenly distributed limiting holes. A lifting and fixing structure is provided in the limiting holes, which can move the adjusting part upward and fix it. An isolation tube matching the isolation channel is provided in the isolation channel. The upper end of the isolation tube is fixed to the inner wall of the upper channel, and the lower end of the isolation tube is a free end. The upper outer wall of the isolation tube abuts against the inner wall of the upper channel, and the lower outer wall of the isolation tube abuts against the inner wall of the lower channel.

[0008] The lifting and fixing structure includes several upper hidden grooves on the lower end face of the adjusting part, corresponding to the positions of the limiting holes; a positioning hole is provided at the center of the bottom of the upper hidden groove; the center of the bottom of the positioning hole and the center of the bottom of the limiting hole are connected through a moving hole; a screw rod coaxial with the limiting hole is provided in the limiting hole; a limiting head is provided at the upper end of the screw rod; several lower hidden grooves opposite to the upper hidden grooves are provided on the upper end face of the fixing part; a fixing hole is provided at the center of the bottom of the lower hidden groove; the lower end of the screw rod passes downward through the moving hole, the positioning hole, the upper hidden groove, and the lower hidden groove in sequence and is screwed into the fixing hole; a limiting sleeve located in the positioning hole is screwed to the outside of the screw rod; the upper end face of the limiting sleeve is in contact with the bottom of the positioning hole, and the lower end of the limiting sleeve is located in the lower hidden groove; a pressure spring sleeved outside the screw rod is provided between the lower surface of the limiting head and the bottom of the limiting hole.

[0009] The lower surface of the limiting head has a connecting hole at its center, and the upper end of the screw is screwed into the connecting hole.

[0010] The limiting head is in the shape of a regular hexagon.

[0011] The lower outer wall of the limiting sleeve has a hexagonal disassembly surface.

[0012] The upper port of the upper channel has several evenly distributed threaded holes on its inner wall; the upper end of the isolation tube has several side hidden grooves on its inner wall that are opposite to the positions of the threaded holes; the bottom center of the side hidden groove has a through hole that communicates with the threaded holes; an insulating screw passes through the through hole and is screwed into the threaded hole, with the head of the insulating screw fitting against the bottom of the side hidden groove.

[0013] The lower end of the isolation tube has an annular outer sealing groove on its outer wall; a matching outer sealing ring is provided inside the outer sealing groove; the upper side port of the lower channel has an annular inner sealing groove on its inner wall; a matching inner sealing ring is provided inside the inner sealing groove; both the outer sealing ring and the inner sealing ring are made of insulating material.

[0014] The outer and inner sealing rings are made of rubber.

[0015] The outer wall of the fixing part is provided with a plurality of evenly distributed lower reinforcing wings; the outer wall of the adjusting part is provided with a plurality of upper reinforcing wings corresponding to the positions of the lower reinforcing wings; the lower end face of the upper reinforcing wing is in contact with the upper end face of the lower reinforcing wing.

[0016] The upper end of the limiting hole is provided with a matching sealing plug; the upper outer wall of the sealing plug is provided with a positioning part that fits against the upper end face of the adjusting part; the positioning part and the adjusting part are fixed together by a number of evenly distributed positioning screws; the sealing plug and the positioning part are integrally formed and both are made of rubber.

[0017] The beneficial effects of this utility model are:

[0018] Compared with the prior art, the circuit breaker using the structure of this utility model uses an environmentally friendly insulated main shaft that divides the swing shaft into a fixed part and an adjusting part. The adjusting part can be moved upward by a lifting and fixing structure and its position can be fixed after the upward movement. When the adjusting part moves upward, the vertical distance between the upper port of the upper channel and the lower port of the lower channel increases, thereby effectively increasing the length of the isolation channel and accommodating a longer isolation blade. While the length of the isolation channel increases, the isolation blade can be kept isolated from the outside world by the isolation tube, which minimizes the risk of the isolation blade being exposed to the outside world and causing the arc to be elongated, thus effectively eliminating safety hazards. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the environmentally friendly insulated spindle for the circuit breaker of this utility model;

[0020] Figure 2 yes Figure 1 An enlarged view of part A;

[0021] Figure 3 yes Figure 1 An enlarged view of part B;

[0022] Figure 4 This is a schematic diagram of the structure of the environmentally friendly insulated spindle for circuit breakers of this utility model. Detailed Implementation

[0023] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0024] Please see Figures 1 to 4This utility model provides an environmentally friendly insulating spindle for circuit breakers, including a rotating shaft part 1, a rotating groove 2 disposed on the rotating shaft part 1, and a swing shaft part 3. The swing shaft part 3 is provided with an isolation channel 4 that communicates with the rotating groove 2. The swing shaft part 3 consists of a fixed part 301 disposed on the rotating shaft part 1 and an adjusting part 302 located above the fixed part 301. The lower end face of the adjusting part 302 is in contact with the upper end face of the fixed part 301. The isolation channel 4 consists of a lower channel 401 located in the fixed part 301 and an upper channel located in the adjusting part 302. Composed of 402; the upper end face of the adjustment part 302 is provided with several evenly distributed limiting holes 5; a lifting and fixing structure is provided in the limiting holes 5, which can move the adjustment part 302 upward and fix the adjustment part 302; the isolation channel 4 is provided with a matching isolation tube 6; the upper end of the isolation tube 6 is fixed to the inner wall of the upper channel 402, and the lower end of the isolation tube 6 is a free end; the upper outer wall of the isolation tube 6 is in contact with the inner wall of the upper channel 402, and the lower outer wall of the isolation tube 6 is in contact with the inner wall of the lower channel 401.

[0025] The lifting and fixing structure includes several upper hidden grooves 7 on the lower end face of the adjusting part 302, corresponding to the positions of the limiting holes 5; a positioning hole 8 is provided at the center of the bottom of the upper hidden groove 7; the center of the bottom of the positioning hole 8 and the center of the bottom of the limiting hole 5 are connected through a moving hole 9; a screw 10 coaxial with the limiting hole 5 is provided in the limiting hole 5; a limiting head 11 is provided at the upper end of the screw 10; several lower hidden grooves 12 are provided on the upper end face of the fixing part 301, corresponding to the upper hidden grooves 7; the lower hidden grooves 12 are provided with a number of upper hidden grooves 7; the lower hidden grooves 12 are provided with a number of lower hidden grooves 12; the lower hidden grooves 12 are provided with a number of upper hidden grooves 7; the upper ... A fixing hole 13 is provided at the center of the bottom of the concealed groove 12; the lower end of the screw 10 passes through the moving hole 9, the positioning hole 8, the upper concealed groove 7, and the lower concealed groove 12 in sequence and is screwed into the fixing hole 13; a limiting sleeve 14 located in the positioning hole 8 is screwed onto the outside of the screw 10; the upper end face of the limiting sleeve 14 is in contact with the bottom of the positioning hole 8, and the lower end of the limiting sleeve 14 is located in the lower concealed groove 12; a pressure spring 15 is provided between the lower surface of the limiting head 11 and the bottom of the limiting hole 5, which is fitted onto the outside of the screw 10.

[0026] The lower surface of the limiting head 11 is provided with a connecting hole 16 at the center, and the upper end of the screw 10 is screwed into the connecting hole 16.

[0027] The limiting head 11 is in the shape of a regular hexagon.

[0028] The lower outer wall of the limiting sleeve 14 is provided with a hexagonal disassembly surface 17.

[0029] The upper port of the upper channel 402 has a number of evenly distributed threaded holes 18 on its inner wall; the upper end of the isolation tube 6 has a number of side hidden grooves 19 on its inner wall that are opposite to the positions of the threaded holes 18; the bottom center of the side hidden groove 19 has a through hole 20 that communicates with the threaded holes 18; an insulating screw 21 passes through the through hole 20 and is screwed into the threaded hole 18, and the head of the insulating screw 21 is in contact with the bottom of the side hidden groove 19.

[0030] The lower end of the isolation tube 6 has an annular outer sealing groove 22 on its outer wall; the outer sealing groove 22 is provided with a matching outer sealing ring 23; the upper port of the lower channel 401 has an annular inner sealing groove 24 on its inner wall; the inner sealing groove 24 is provided with a matching inner sealing ring 25; both the outer sealing ring 23 and the inner sealing ring 25 are made of insulating material.

[0031] The outer wall of the fixing part 301 is provided with a plurality of evenly distributed lower reinforcing wings 26; the outer wall of the adjusting part 302 is provided with a plurality of upper reinforcing wings 27 corresponding to the positions of the lower reinforcing wings 26; the lower end face of the upper reinforcing wing 27 is in contact with the upper end face of the lower reinforcing wing 26.

[0032] The outer sealing ring 23 and the inner sealing ring 25 are made of rubber.

[0033] The outer wall of the fixing part 301 is provided with a plurality of evenly distributed lower reinforcing wings 26; the outer wall of the adjusting part 302 is provided with a plurality of upper reinforcing wings 27 corresponding to the positions of the lower reinforcing wings 26; the lower end face of the upper reinforcing wing 27 is in contact with the upper end face of the lower reinforcing wing 26.

[0034] The upper end of the limiting hole 5 is provided with a matching sealing plug 28; the upper outer wall of the sealing plug 28 is provided with a positioning part 29 that fits against the upper end face of the adjustment part 302; the positioning part 29 and the adjustment part 302 are fixed together by a number of evenly distributed positioning screws 30; the sealing plug 28 and the positioning part 29 are integrally formed and both are made of rubber.

[0035] The method of using this utility model is as follows:

[0036] When the actual length of the isolation channel 4 needs to be increased to accommodate a longer isolation blade, the adjustment part 302 can be pulled upwards. At this time, the distance between the lower end face of the adjustment part 302 and the upper end face of the fixed part 301 increases, and the distance between the upper port of the upper channel 402 and the lower port of the lower channel 401 increases. The vertical distance between the upper port of the upper channel 402 and the lower port of the lower channel 401 determines the actual length of the isolation channel 4. As the distance between the upper port of the upper channel 402 and the lower port of the lower channel 401 increases, the actual length of the isolation channel 4 also increases. During the upward movement of the adjustment part 302, since the lower end of the isolation tube 6 is a free end, the lower end of the isolation tube 6 can move smoothly upwards along the trajectory of the inner wall of the lower channel 401. Thus, the outer wall of the isolation tube 6 isolates the space between the lower end face of the adjustment part 302 and the upper end face of the fixed part 301, so that the isolation blade is always wrapped inside the isolation tube 6 and the lower channel 401, avoiding the situation where the upper movement of the adjustment part 302 causes part of the isolation blade located in the isolation channel 4 to be exposed to the outside.

[0037] When the adjustment part 302 is moved upward, due to the presence of the pressure spring 15, the adjustment part 302 can move upward smoothly while there is always a force pressing down on it. At this time, the limiting sleeve 14 can be rotated so that it moves upward along the thread track outside the screw 10. The limiting sleeve 14 can effectively change the height of the adjustment part 302 by limiting the bottom of the positioning hole 8 with its upper end. At the same time, the height of the adjustment part 302 is fixed after adjustment. The limiting sleeve 14 can limit the downward movement of the adjustment part 302, and the elasticity of the pressure spring 15 can limit the upward movement of the adjustment part 302, thereby ensuring the stability of the adjustment part 302 after height adjustment.

[0038] In summary, this utility model divides the swing shaft part 3 into a fixed part 301 and an adjusting part 302. The adjusting part 302 can be moved upward by the lifting and fixing structure and its position can be fixed after the upward movement. When the adjusting part 302 moves upward, the vertical distance between the upper port of the upper channel 402 and the lower port of the lower channel 401 increases, thereby effectively increasing the length of the isolation channel 4, which can accommodate an isolation knife with a longer length. At the same time as the length of the isolation channel 4 increases, the isolation knife can be kept isolated from the outside world by the isolation tube 6, which avoids the situation where the isolation knife is exposed to the outside world and the arc is stretched to the greatest extent, effectively eliminating safety hazards.

[0039] A connecting hole 16 is provided at the center of the lower surface of the limiting head 11. The upper end of the screw 10 is screwed into the connecting hole 16. This fixing method facilitates the disassembly and assembly of the limiting head 11 and the connecting hole 16, thereby facilitating the replacement and maintenance of the parts.

[0040] The limiting head 11 is hexagonal and can be engaged with a matching wrench, which facilitates the application of force to the limiting head 11 and thus makes it easier to assemble and disassemble the limiting head.

[0041] The lower outer wall of the limiting sleeve 14 is provided with a hexagonal disassembly surface 17. The presence of the disassembly surface 17 facilitates the engagement of the lower part of the limiting sleeve 14 with a matching wrench, thereby enabling the limiting sleeve 14 to be rotated quickly by the wrench, effectively improving the efficiency of adjusting the length of the isolation channel 4.

[0042] The upper port of the upper channel 402 has several evenly distributed threaded holes 18 on its inner wall. The upper end of the isolation tube 6 has several side hidden grooves 19 on its inner wall, which are opposite to the positions of the threaded holes 18. The bottom center of the side hidden groove 19 has a through hole 20 that communicates with the threaded holes 18. An insulating screw 21 passes through the through hole and is screwed into the threaded hole 18. The head of the insulating screw 21 fits against the bottom of the side hidden groove 19. This fixing method can not only effectively ensure the stability between the isolation tube 6 and the upper channel 402, but also facilitate the disassembly and assembly of the isolation tube 6.

[0043] The lower end of the isolation tube 6 has an annular outer sealing groove 22 on its outer wall, and a matching outer sealing ring 23 is provided in the outer sealing groove 22. The upper port of the lower channel 401 has an annular inner sealing groove 24 on its inner wall, and a matching inner sealing ring 25 is provided in the inner sealing groove 24. The outer sealing ring 23 and the inner sealing ring 25 are made of rubber. The presence of the outer sealing ring 23 and the inner sealing ring 25 can form a double seal, further preventing the electric arc from being released through the gap between the outer wall of the isolation tube 6 and the inner wall of the lower channel 401.

[0044] The outer wall of the fixing part 301 is provided with a plurality of evenly distributed lower reinforcing wings 26, and the outer wall of the adjusting part 302 is provided with a plurality of upper reinforcing wings 27 corresponding to the positions of the lower reinforcing wings 26. The lower end face of the upper reinforcing wing 27 is in contact with the upper end face of the lower reinforcing wing 26. The presence of the upper reinforcing wing 27 can not only effectively improve the strength of the adjusting part, but also allow the adjusting part 302 to be quickly pulled by the upper reinforcing wing 27, which is conducive to the height adjustment of the adjusting part 302. The presence of the lower reinforcing wings 26 can effectively improve the strength of the fixing part 301.

[0045] A matching sealing plug 28 is provided inside the upper opening of the limiting hole 5. The upper outer wall of the sealing plug 28 is provided with a positioning part 29 that fits against the upper surface of the adjusting part 302. The positioning part 29 and the adjusting part 302 are fixed together by several evenly distributed positioning screws 30. The sealing plug 28 and the positioning part 29 are integrally formed and both are made of rubber. This fixing method can not only ensure the stability of the sealing plug 28, but also facilitate the disassembly and assembly of the sealing plug 28. The presence of the sealing plug 28 can effectively prevent external dust and debris from entering the limiting hole 5, and can effectively protect the pressure spring 15 located in the limiting hole 5.

Claims

1. An environmentally friendly insulated spindle for circuit breakers, comprising a rotating shaft portion, a rotating groove disposed on the rotating shaft portion, and a swing shaft portion, wherein the swing shaft portion is provided with an isolation channel communicating with the rotating groove, characterized in that: The swing shaft consists of a fixed part on the rotating shaft and an adjusting part above the fixed part, with the lower end face of the adjusting part fitting against the upper end face of the fixed part. The isolation channel consists of a lower channel located within the fixed part and an upper channel located within the adjusting part. The upper end face of the adjusting part is provided with several evenly distributed limiting holes. A lifting and fixing structure is provided within the limiting holes, which can move the adjusting part upward and fix it. The isolation channel is provided with a matching isolation tube. The upper end of the isolation tube is fixed to the inner wall of the upper channel, and the lower end of the isolation tube is a free end. The upper outer wall of the isolation tube fits against the inner wall of the upper channel, and the lower outer wall of the isolation tube fits against the inner wall of the lower channel.

2. The environmentally friendly insulated spindle for circuit breakers according to claim 1, characterized in that: The lifting and fixing structure includes several upper hidden grooves on the lower end face of the adjusting part, corresponding to the positions of the limiting holes; a positioning hole is provided at the center of the bottom of the upper hidden groove; the center of the bottom of the positioning hole and the center of the bottom of the limiting hole are connected through a moving hole; a screw rod coaxial with the limiting hole is provided in the limiting hole; a limiting head is provided at the upper end of the screw rod; several lower hidden grooves opposite to the upper hidden grooves are provided on the upper end face of the fixing part; a fixing hole is provided at the center of the bottom of the lower hidden groove; the lower end of the screw rod passes downward through the moving hole, the positioning hole, the upper hidden groove, and the lower hidden groove in sequence and is screwed into the fixing hole; a limiting sleeve located in the positioning hole is screwed to the outside of the screw rod; the upper end face of the limiting sleeve is in contact with the bottom of the positioning hole, and the lower end of the limiting sleeve is located in the lower hidden groove; a pressure spring sleeved outside the screw rod is provided between the lower surface of the limiting head and the bottom of the limiting hole.

3. An environmentally friendly insulating spindle for a circuit breaker according to claim 2, characterized in that: The lower surface of the limiting head has a connecting hole at its center, and the upper end of the screw is screwed into the connecting hole.

4. An environmentally friendly insulating spindle for a circuit breaker according to claim 3, characterized in that: The limiting head is in the shape of a regular hexagon.

5. An environmentally friendly insulating spindle for a circuit breaker according to claim 2, characterized in that: The lower outer wall of the limiting sleeve has a hexagonal disassembly surface.

6. An environmentally friendly insulating spindle for a circuit breaker according to claim 2, characterized in that: The upper port of the upper channel has several evenly distributed threaded holes on its inner wall; the upper end of the isolation tube has several side hidden grooves on its inner wall that are opposite to the positions of the threaded holes; the bottom center of the side hidden groove has a through hole that communicates with the threaded holes; an insulating screw passes through the through hole and is screwed into the threaded hole, with the head of the insulating screw fitting against the bottom of the side hidden groove.

7. An environmentally friendly insulating spindle for a circuit breaker according to claim 1, characterized in that: The lower end of the isolation tube has an annular outer sealing groove on its outer wall; a matching outer sealing ring is provided inside the outer sealing groove; the upper side port of the lower channel has an annular inner sealing groove on its inner wall; a matching inner sealing ring is provided inside the inner sealing groove. Both the outer and inner sealing rings are made of insulating material.

8. An environmentally friendly insulating spindle for a circuit breaker according to claim 7, characterized in that: The outer and inner sealing rings are made of rubber.

9. The environmentally friendly insulating spindle for a circuit breaker according to claim 1, characterized in that: The outer wall of the fixing part is provided with a plurality of evenly distributed lower reinforcing wings; the outer wall of the adjusting part is provided with a plurality of upper reinforcing wings corresponding to the positions of the lower reinforcing wings; the lower end face of the upper reinforcing wing is in contact with the upper end face of the lower reinforcing wing.

10. An environmentally friendly insulating spindle for a circuit breaker according to claim 1, characterized in that: The upper end of the limiting hole is provided with a matching sealing plug; the upper outer wall of the sealing plug is provided with a positioning part that fits against the upper end face of the adjusting part; the positioning part and the adjusting part are fixed together by a number of evenly distributed positioning screws; the sealing plug and the positioning part are integrally formed and both are made of rubber.

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