A multi-dimensional damping device for a Y-shaped circuit breaker

Abstract

The present application relates to a kind of Y-shaped circuit breaker multidimensional damping device, including Y-shaped circuit breaker, also including damping part, the damping part includes protective wall, containing body and damping component, the containing body includes shell and support component, the outer peripheral wall upper end and lower end of shell are connected with connecting plate, there is adjusting plate in the annular array of the outer peripheral wall of shell, the support component includes support spring and insulating bearing plate, the damping component includes SMA cable group and SMA spring group, the inner end of multiple SMA cables in each SMA cable group is tangent with the outer peripheral wall of corresponding connecting plate, the SMA spring group is made of multiple SMA springs, multiple SMA springs are connected between protective wall and multiple adjusting plate in annular array, the direction of force of shell by SMA spring group through adjusting plate and the direction of force of shell by two SMA cable groups through connecting plate are opposite.The present application can make Y-shaped circuit breaker form flexible connection between suspension and ground and carry out multidimensional damping energy dissipation.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of circuit breaker damping, in particular to a multi-dimensional damping device for Y-shaped circuit breaker. BACKGROUND

[0002] High-voltage circuit breakers not only can cut off or close the no-load current and load current in high-voltage circuits, but also can cut off the load current and short-circuit current through the action of relay protection devices when system faults occur. They have quite perfect arc extinguishing structures and sufficient breaking capacity, and can be divided into: oil circuit breakers, sulfur hexafluoride circuit breakers, compressed air circuit breakers, vacuum circuit breakers, etc.

[0003] Y-shaped circuit breakers are a kind of high-voltage circuit breakers, and the connection structure of their support porcelain column and two support arms is similar to the English letter "Y". Y-shaped circuit breakers are prone to breakage in earthquakes. When horizontal vibration occurs, the root of the support porcelain column is prone to breakage. When vertical vibration occurs, the root of the support arm is prone to breakage. When horizontal and vertical vibrations occur simultaneously, the breakage of the support porcelain column and the support arm will be aggravated.

[0004] The patent document 201810983405.X discloses a composite three-dimensional damping system for supporting electric appliance stay wire SMA, which is used in a thin and high porcelain column type support electric appliance. The thin and high porcelain column type support electric appliance includes a support porcelain column, a device support and a support arm. It includes a plurality of oblique stay wire SMA damping devices and a plurality of vertical stay wire SMA damping devices. Each vertical stay wire SMA damping device is distributed on the left and right sides of the support porcelain column, and each vertical stay wire SMA damping device is distributed around the support porcelain column in the circumferential direction. Each vertical stay wire SMA damping device includes a first oblique stay wire, a first SMA damper, a second oblique stay wire, a first pre-tightening bolt and a third oblique stay wire. Each vertical stay wire SMA damping device includes a first vertical stay wire, a second SMA damper, a second vertical stay wire and a second pre-tightening bolt. This technical solution can only have a certain damping effect on the two support arms. Because the support porcelain column is connected to the ground through the device support, the damping device does not have a vibration isolation effect, and the damping effect is limited. SUMMARY

[0005] To solve the problem of unsatisfactory damping effect of existing circuit breakers, the present application provides a multi-dimensional damping device for Y-shaped circuit breaker, which aims to make the Y-shaped circuit breaker form a flexible connection with the ground and perform energy dissipation and damping.

[0006] To achieve the above-mentioned purpose, the technical solution of the present application is as follows:

[0007] A multi-dimensional damping device for Y-shaped circuit breaker, comprising a Y-shaped circuit breaker, the Y-shaped circuit breaker comprising a support porcelain column and a support arm, further comprising a damping part, the damping part comprising a protective wall, a containing body and a damping assembly.

[0008] The protective wall is a hollow body with an open upper end and a square cross section, and a drainage hole is arranged at the lower end of the peripheral wall of the protective wall, with the inner peripheral wall of the drainage hole being tangent to the inner bottom surface of the protective wall.

[0009] The accommodating body is located in the protective wall, and the accommodating body comprises a shell and a support assembly. The upper end of the shell is open, and there is a gap between the outer bottom surface of the shell and the inner bottom surface of the protective wall. A cylindrical insulation layer is connected to the inner peripheral wall of the shell. A drainage hole is arranged on the bottom plate of the shell. A circular ring-shaped connecting plate is connected to the upper end and the lower end of the outer peripheral wall of the shell. A plurality of adjusting plates are arranged in a circular array on the outer peripheral wall of the shell between the two connecting plates. The support assembly comprises a support spring and an insulation bearing plate. The support spring is arranged vertically in the lower part of the shell. The upper part of the support spring is provided with an insulation bearing plate which is in sliding contact with the inner peripheral wall of the insulation layer.

[0010] The lower part of the support ceramic column of the Y-shaped circuit breaker extends into the shell above the insulation bearing plate and is in sliding state with the inner peripheral wall of the insulation layer and the upper surface of the insulation bearing plate.

[0011] The damping assembly comprises an SMA cable group and an SMA spring group. The SMA cable group has two upper and lower intervals. Two SMA cable groups are connected to two connecting plates respectively. Each SMA cable group is composed of a plurality of SMA cables. The SMA cables are in an inclined tension state with the inner end low and the outer end high. The inner end of the SMA cable is connected to the corresponding connecting plate, and the outer end is connected to the protective wall. The inner end of each SMA cable in each SMA cable group is tangent to the outer peripheral wall of the corresponding connecting plate. Each SMA cable in each SMA cable group is arranged in a circular array on the outer surface of the corresponding connecting plate. The SMA spring group is composed of a plurality of SMA springs. The plurality of SMA springs are connected in a circular array between the protective wall and the plurality of adjusting plates. The plurality of SMA cables in each SMA cable group are arranged in a clockwise inclined manner. One end of each SMA spring in the SMA spring group is connected to one side of the corresponding adjusting plate in the counterclockwise direction. The other end of each SMA spring is connected to the inner wall of the protective wall corresponding to the side of the corresponding adjusting plate in the counterclockwise direction. That is, the plurality of SMA springs in the SMA spring group are arranged in a counterclockwise manner.

[0012] Further, the width of the adjusting plate and the ring width of the connecting plate are equal, and the adjusting plate and the connecting plate are both spaced apart from the protective wall.

[0013] Further, the number of SMA cables in each SMA cable group and the number of SMA springs in the SMA spring group are consistent with the number of side walls of the protective wall. The two ends of each SMA spring are respectively connected to the adjusting plate and the side wall of the protective wall perpendicularly.

[0014] Further, the inner bottom surface of the protective wall is an inclined surface with one end high and the other end low, and the drainage hole is communicated with the lower end of the inner bottom surface of the protective wall.

[0015] Further, the inner bottom surface of the shell is a spherical surface recessed downward, and the upper end of the drainage hole is communicated with the lowest part of the inner bottom surface of the shell.

[0016] Further, a plurality of recesses recessed to the interior of the insulation bearing plate and outwardly open are arranged on the outer peripheral wall of the insulation bearing plate, and the upper and lower ends of the recesses penetrate the upper and lower surfaces of the insulation bearing plate.

[0017] Further, the SMA spring is an SMA tension spring, and the SMA spring is in a semi-stretched state.

[0018] Further, the outer end of each SMA cable is connected at the corner of the protective wall.

[0019] Further, a circular reserved hole coaxial with the drainage hole is arranged at the center of the insulation bearing plate, and the diameter of the reserved hole is consistent with the diameter of the drainage hole.

[0020] Further, a door is arranged on the protective wall, and the upper end of the door is lower than the connection between the SMA spring of the SMA cable group below and the protective wall.

[0021] Through the above technical solution, the beneficial effects of the present application are:

[0022] The accommodating body is stably suspended in the protective wall body after the Y-shaped circuit breaker is installed in the accommodating body, and the accommodating body is flexibly connected with the ground.

[0023] The protective wall body can protect the Y-shaped circuit breaker when there is no earthquake, and prevent the behavior of electric shock caused by the too close of irrelevant personnel.

[0024] The Y-shaped circuit breaker can be isolated from the ground vibration, and has strong reduction capacity for earthquake vibration.

[0025] No water is accumulated in the present application, and the electric breakdown phenomenon caused by rainy and humid weather can be avoided.

[0026] The present application can buffer and isolate the vibration in any direction. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is the sectional view of the present application;

[0028] Figure 2 is the structure diagram of the damping part (partially sectioned of the protective wall) of the present application;

[0029] Figure 3 is the top view of the damping part of the present application.

[0030] Figure 4 is the front view of the damping part of the application (protective wall part section view);

[0031] Figure 5 is the A-A sectional view of Figure 4 ;

[0032] Figure 6 is the B-B sectional view of Figure 4 ;

[0033] Figure 7 is the structural schematic diagram of the shell, connecting plate and adjusting plate connection of the application;

[0034] Figure 8 is the sectional front view of the shell, connecting plate and adjusting plate connection of the application.

[0035] In the drawings, 1 is a Y-shaped circuit breaker, 2 is a support column, 3 is a support arm, 4 is a protective wall, 5 is a containing body, 6 is a drainage hole, 7 is a shell, 8 is a support assembly, 9 is an insulating layer, 10 is a drainage hole, 11 is a connecting plate, 12 is an adjusting plate, 13 is a support spring, 14 is an insulating bearing plate, 15 is an SMA cable, 16 is an SMA spring, 17 is a groove, 18 is a door, and 19 is a reserved hole. DETAILED DESCRIPTION

[0036] The application will be further described below in conjunction with the drawings and specific embodiments:

[0037] It should be noted that the directional words such as "front", "back", "left", "right", "up", "down", "bottom surface" and "top surface" used in the following description refer to the directions in the drawings, and the words "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a particular component.

[0038] As shown in Figures 1-8 , a Y-shaped circuit breaker multi-dimensional damping device, comprising a Y-shaped circuit breaker 1, the Y-shaped circuit breaker 1 comprising a support column 2 and a support arm 3, further comprising a damping part, the damping part comprising a protective wall 4, a containing body 5 and a damping assembly;

[0039] The protective wall 4 is a hollow body with an open upper end and a square cross section, and the protective wall 4 is provided with a drainage hole 6 at the lower end of the peripheral wall, and the inner peripheral wall of the drainage hole 6 is tangent to the inner bottom surface of the protective wall 4;

[0040] The accommodating body 5 is located in the protective wall 4, the accommodating body 5 includes a shell 7 and a support assembly 8, the shell 7 is a cylinder, the upper end of the shell 7 is open, there is a gap between the outer bottom surface of the shell 7 and the inner bottom surface of the protective wall 4, a cylindrical insulation layer 9 is connected to the inner circumferential wall of the shell 7, the insulation layer 9 is made of polytetrafluoroethylene, the inner circumferential wall diameter of the insulation layer 9 is matched with the circumferential wall diameter of the support porcelain column 2, a drain hole 10 is arranged on the bottom plate of the shell 7, the drain hole 10 is a circular through hole penetrating through the bottom plate of the shell 7, the outer circumferential wall of the shell 7 is connected with a circular ring-shaped connecting plate 11 at the upper end and the lower end, a plurality of adjusting plates 12 are arranged in an annular array on the outer circumferential wall of the shell 7 and located between the two connecting plates 11, the adjusting plate 12 is a vertical plate body, the support assembly 8 includes a support spring 13 and an insulation bearing plate 14, the support spring 13 is vertically arranged in the lower part of the shell 7, the upper part of the support spring 13 is provided with the insulation bearing plate 14 in sliding contact with the inner circumferential wall of the insulation layer 9, the support spring 13 is connected with the inner bottom surface of the shell 7 and the lower surface of the insulation bearing plate 14 respectively, the insulation bearing plate 14 is a plate body made of polytetrafluoroethylene;

[0041] The lower part of the support porcelain column 2 of the Y-shaped circuit breaker 1 extends into the shell 7 above the insulation bearing plate 14 and is in sliding state with the inner circumferential wall of the insulation layer 9 and the upper surface of the insulation bearing plate 14, the lower end of the support porcelain column 2 is in contact with the upper surface of the insulation bearing plate 14, and the lower circumferential wall of the support porcelain column 2 is in sliding contact with the inner circumferential wall of the insulation layer 9;

[0042] The damping assembly comprises an SMA cable group and an SMA spring group, the SMA cable group has two upper and lower intervals, two SMA cable groups are connected to two connecting plates 11 respectively, each SMA cable group is composed of a plurality of SMA cables 15, the SMA cables 15 are in an inclined tension state with the inner end low and the outer end high, the inner end of the SMA cable 15 is connected to the corresponding connecting plate 11, and the outer end is connected to the protective wall 4, the inner end of the plurality of SMA cables 15 in each SMA cable group is tangent to the outer peripheral wall of the corresponding connecting plate 11, the plurality of SMA cables 15 in each SMA cable group are arranged in a ring array on the corresponding connecting plate 11, the SMA cables 15 in the SMA cable group located on the upper side are connected to the peripheral wall of the connecting plate 11 located on the upper side and the upper end of the protective wall 4, and the SMA cables 15 in the SMA cable group located on the lower side are connected to the peripheral wall of the connecting plate 11 located on the lower side and the middle part of the protective wall 4, the SMA spring group is located between the two SMA cable groups, the SMA spring group is composed of a plurality of SMA springs 16, the plurality of SMA springs 16 are arranged in a ring array and connected between the protective wall 4 and the plurality of adjusting plates 12, the plurality of SMA cables 15 in each SMA cable group are arranged in a clockwise inclined manner, one end of each SMA spring 16 in the SMA spring group is connected to one side of the corresponding adjusting plate 12 in the counterclockwise direction, and the other end of each SMA spring 16 is connected to the inner wall of the corresponding protective wall 4 on the side of the corresponding adjusting plate 12 in the counterclockwise direction, that is, the plurality of SMA springs 16 in the SMA spring group are arranged in a counterclockwise manner (that is, the force of the SMA spring group on the shell 7 through the adjusting plate 12 is opposite to the force of the two SMA cable groups on the shell 7 through the connecting plate 11).

[0043] The width of the adjusting plate 12 and the ring width of the connecting plate 11 are equal, and the adjusting plate 12 and the connecting plate 11 are spaced apart from the protective wall 4.

[0044] The number of SMA cables 15 in each SMA cable group and the number of SMA springs 16 in the SMA spring group are consistent with the number of side walls of the protective wall 4, and the two ends of each SMA spring 16 are respectively connected to the adjusting plate 12 and the side wall of the protective wall 4 perpendicularly.

[0045] The inner bottom surface of the protective wall 4 is an inclined surface with one end high and one end low, and the drainage hole 6 is connected to the lower end of the inner bottom surface of the protective wall 4.

[0046] The inner bottom surface of the shell 7 is a spherical concave downward spherical surface, and the upper end of the drain hole 10 is communicated with the lowest part of the inner bottom surface of the shell 7.

[0047] The insulating bearing plate 14 is a circular plate body, and a plurality of recesses 17 are arranged on the outer peripheral wall of the insulating bearing plate 14, the recesses 17 are recessed towards the inside of the insulating bearing plate 14 and have openings facing outward, and the upper and lower ends of the recesses 17 penetrate the upper and lower surfaces of the insulating bearing plate 14, and the recesses 17 are used for drainage.

[0048] The SMA spring 16 is an SMA tension spring, and when there is no earthquake, the SMA spring 16 is in a half-stretched state, that is, the length of the SMA spring 16 when there is no earthquake is equal to half the length of the SMA spring 16 when stretched to the limit.

[0049] Each of the outer ends of the SMA cables 15 is connected at a corner of the protective wall 4, as shown in the figure: among the SMA cables 15 of the upper SMA cable group, one SMA cable 15 has its outer end connected at the upper end of the corner formed by the connection of the right side wall and the back side wall of the protective wall 4, and the remaining SMA cables 15 of the upper SMA cable group are connected at the upper ends of the other corners of the protective wall 4, among the SMA cables 15 of the lower SMA cable group, one SMA cable 15 has its outer end connected at the middle of the corner formed by the connection of the right side wall and the back side wall of the protective wall 4, and the remaining SMA cables 15 of the lower SMA cable group are connected at the middle of the other corners of the protective wall 4. Figure 1

[0050] The center of the insulating bearing plate 14 is provided with a circular reserved hole 19 coaxial with the drain hole 10, and the diameter of the reserved hole 19 is consistent with the diameter of the drain hole 10.

[0051] The protective wall 4 is provided with a door 18, and the upper end of the door 18 is lower than the connection between the SMA spring of the lower SMA cable group and the protective wall 4.

[0052] In use, because the SMA cable 15 is tangent to the connecting plate 11, the SMA cable 15 is in an inclined state, and the SMA cable 15 has a torque for rotating the containing body 5 and an upward pulling force, wherein the torque for rotating the containing body 5 is counteracted by the elastic force of the SMA spring 16, and the upward pulling force for lifting the containing body 5 is counteracted by the gravity of the Y-shaped circuit breaker 1 itself, so that the Y-shaped circuit breaker 1 can be stably suspended in the interior of the protective wall 4 after being installed in the containing body 5, and the containing body 5 is flexibly connected to the protective wall 4 through the damping assembly, that is, the containing body 5 is flexibly connected to the ground.

[0053] When there is no earthquake, the protective wall 4 can protect the Y-shaped circuit breaker 1 from being too close to an unrelated person to cause electric shock.

[0054] ​When the earthquake comes, the SMA cable and the SMA spring can effectively realize energy dissipation due to the fact that the protective wall 4, the containing body 5 and the damping assembly form a tuned mass system, thereby reducing the seismic response of the Y-shaped circuit breaker, the containing body 5 improves the anti-bending and anti-fracture performance of the Y-shaped circuit breaker 1, and further reduces the damage of the earthquake to the Y-shaped circuit breaker 1; that is, when the earthquake comes, the protective wall 4 moves with the ground shaking, and the end of the SMA cable 15 connected with the protective wall 4 and the end of the SMA spring connected with the protective wall 4 are driven to move, the SMA cable 15 and the SMA spring are deformed to reduce the influence of the earthquake displacement on the containing body 5, and the elastic force of the SMA spring has hysteresis, which leads to the unbalance of the force of the SMA cable 15 and the SMA spring on the containing body 15, and the unbalanced force makes the shell 7 have a tendency to move upward and a tendency to rotate around the Y-shaped circuit breaker 1, when the shell 7 moves upward, because there is a support assembly 8 on the inner bottom surface of the shell 7, the support spring 13 and the insulating bearing plate 14 can make the shell 7 and the Y-shaped circuit breaker 1 relatively move to form buffering and energy dissipation, thereby avoiding the fracture of the two support arms 3 of the Y-shaped circuit breaker 1 due to the sudden vibration in the upward and downward directions, when the shell 7 rotates around the Y-shaped circuit breaker 1, the support porcelain column 2 of the Y-shaped circuit breaker 1 and the insulating layer 9 are in sliding contact, and the insulating bearing plate 14 and the insulating layer 9 are in sliding contact, the Y-shaped circuit breaker 1 does not rotate with the shell 7, and the angular displacement generated by the rotation of the shell 7 can be dissipated by the SMA cable and the SMA spring, thereby reducing the earthquake effect and avoiding the fracture of the support porcelain column 2 of the Y-shaped circuit breaker 1 due to the sudden horizontal vibration.

[0055] Because the SMA cable 15 and the SMA spring 16 are distributed in a ring array shape, the same effect is achieved in response to horizontal vibration in various directions, so that the present application can play a restraining role in horizontal vibration in any direction, and the support assembly can play a buffering role and an isolation role in vertical direction earthquake.

[0056] The containing body 5 is in a suspended state in the protective wall 4, and the present application can isolate the Y-shaped circuit breaker 1 from ground vibration, and has strong earthquake reduction and isolation capacity.

[0057] The present application mainly dissipates horizontal earthquake by deforming the SMA cable 15 and the SMA spring and rotating the shell 7, improves the energy dissipation effect, and has little influence on the Y-shaped circuit breaker 1 when the shell 7 rotates, compared with the existing Y-shaped circuit breaker damping technology, the present application can suppress earthquake effect in any direction, and the damping design is more reasonable and the damping effect is better.

[0058] The shell 7 of the present application is provided with a water drain hole 10, and the protective wall 4 is provided with a drainage hole 6, and there is no water accumulation in the present application, which can avoid the electric breakdown phenomenon caused by rainy and humid weather.

[0059] The present application is provided with a reserved hole 19, and the Y-shaped circuit breaker can be adjusted or operated through the reserved hole 19.

[0060] The preferred embodiments of the present application are described in detail above with reference to the accompanying drawings, but the present application is not limited to the above-described embodiments, and various modifications can be made to the technical solutions of the present application without departing from the spirit of the present application, i.e., the scope of disclosure.

Claims

1. A multi-dimensional vibration damping device for a Y-shaped circuit breaker, comprising a Y-shaped circuit breaker (1), wherein the Y-shaped circuit breaker (1) includes a supporting porcelain column (2) and a supporting arm (3), characterized in that, It also includes a shock-absorbing part, which includes a protective wall (4), a housing (5), and a shock-absorbing component; The protective wall (4) is a hollow body with an open top and a square cross-section. A drainage hole (6) is provided at the lower end of the peripheral wall of the protective wall (4). The lower end of the inner peripheral wall of the drainage hole (6) is tangent to the inner bottom surface of the protective wall (4). The container (5) is located inside the protective wall (4). The container (5) includes a shell (7) and a support assembly (8). The upper end of the shell (7) is open. There is a gap between the outer bottom surface of the shell (7) and the inner bottom surface of the protective wall (4). A cylindrical insulating layer (9) is connected to the inner peripheral wall of the shell (7). A drain hole (10) is provided on the bottom plate of the shell (7). A ring-shaped connecting plate (11) is connected to the upper and lower ends of the outer peripheral wall of the shell (7). Multiple adjusting plates (12) located between two connecting plates (11) are arranged in a ring on the outer peripheral wall of the shell (7). The support assembly (8) includes a support spring (13) and an insulating bearing plate (14). The support spring (13) is vertically arranged in the lower part of the shell (7). An insulating bearing plate (14) is provided above the support spring (13) and slides in contact with the inner peripheral wall of the insulating layer (9). The lower part of the supporting porcelain column (2) of the Y-shaped circuit breaker (1) extends into the housing (7) above the insulating bearing plate (14) and slides against the inner peripheral wall of the insulating layer (9) and the upper surface of the insulating bearing plate (14); The shock absorption assembly includes an SMA cable group and an SMA spring group. There are two SMA cable groups spaced vertically, each connected to a connecting plate (11). Each SMA cable group consists of multiple SMA cables (15). The SMA cables (15) are in a tilted, tensioned state with the inner end lower than the outer end. The inner end of each SMA cable (15) connects to the corresponding connecting plate (11), and the outer end connects to the protective wall (4). The inner ends of the multiple SMA cables (15) in each SMA cable group are tangent to the outer peripheral wall of the corresponding connecting plate (11). The multiple SMA cables (15) in each SMA cable group are arranged in a ring array outside the corresponding connecting plate (11). The SMA spring assembly consists of multiple SMA springs (16), which are arranged in a ring array between the protective wall (4) and multiple adjusting plates (12). The multiple SMA cables (15) in each SMA cable assembly are arranged in a clockwise inclined manner. One end of each SMA spring (16) in the SMA spring assembly is connected to the side of the corresponding adjusting plate (12) facing the counterclockwise direction, and the other end of each SMA spring (16) is connected to the inner wall of the protective wall (4) directly corresponding to the side of the corresponding adjusting plate (12) facing the counterclockwise direction. That is, the multiple SMA springs (16) in the SMA spring assembly are arranged in a counterclockwise manner.

2. The Y-shaped circuit breaker multi-dimensional vibration damping device according to claim 1, characterized in that, The width of the adjusting plate (12) is equal to the ring width of the connecting plate (11), and there is a gap between the adjusting plate (12) and the connecting plate (11) and the protective wall (4).

3. The Y-shaped circuit breaker multi-dimensional vibration damping device according to claim 1, characterized in that, The number of SMA cables (15) in each SMA cable group and the number of SMA springs (16) in each SMA spring group are consistent with the number of side walls of the protective wall (4). The two ends of each SMA spring (16) are respectively vertically connected to the adjustment plate (12) and the side wall of the protective wall (4).

4. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The inner bottom surface of the protective wall (4) is an inclined surface with one end higher and the other end lower, and the drainage hole (6) is connected to the lower end of the inner bottom surface of the protective wall (4).

5. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The inner bottom surface of the shell (7) is a spherical concave downward spherical surface, and the upper end of the drain hole (10) is connected to the lowest point of the inner bottom surface of the shell (7).

6. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The outer peripheral wall of the insulating support plate (14) is provided with a plurality of grooves (17) that are recessed into the interior of the insulating support plate (14) and open outwards. The upper and lower ends of the grooves (17) penetrate the upper and lower surfaces of the insulating support plate (14).

7. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The SMA spring (16) is an SMA tension spring, and the SMA spring (16) is in a semi-tensioned state.

8. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The outer end of each of the SMA cables (15) is connected to the corner of the protective wall (4).

9. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, The insulating support plate (14) has a circular reserved hole (19) at its center, which is coaxial with the drain hole (10). The diameter of the reserved hole (19) is the same as the diameter of the drain hole (10).

10. A multi-dimensional vibration damping device for a Y-shaped circuit breaker according to claim 1, characterized in that, A door (18) is provided on the protective wall (4), and the upper end of the door (18) is lower than the connection between the SMA spring of the SMA cable group located below and the protective wall (4).

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