Pavement crossing type bus power supply construction method

Abstract

The invention belongs to the technical field of power supply facilities, and particularly relates to a pavement crossing type bus power supply construction method which comprises a power supply system and a system bus protection method in the system, the power supply system comprises a pavement load mechanism, an insulation pouring body, a bus, a junction box and a buried distribution box, and the pavement load mechanism comprises a shell. An insulating pouring body is connected in the shell through a damping mechanism, the insulating pouring body and the shell both stretch across a road surface, a bus penetrates through the insulating pouring body, and junction boxes are connected to the two sides of the shell. The method comprises a protection method for the bus during vertical stress and inclined stress. In the protection method and the construction method disclosed by the invention, the power supply system can fully meet the power supply requirement of the construction of the marine ship engineering module on the premise of not influencing the vehicle passing and not damaging the road surface.

Description

Technical Field

[0001] The invention belongs to the technical field of power supply facilities, and in particular relates to a road surface cross-type busbar power supply construction method. Background Art

[0002] In the construction of marine ship engineering modules, due to the limited number and capacity of distribution boxes, many temporary cables need to be laid on the site to meet the power supply during the project construction process, and these cables will inevitably occupy the road surface for vehicles to pass. In order to ensure the passage of vehicles, the temporary cables are currently protected by digging shallow trenches on the road surface and covering them with steel plates. This method wastes labor, has low laying efficiency, limited current carrying capacity, and has unpredictable damage to the road surface bearing capacity. More importantly, the steel plate deforms when subjected to a large load, which can easily damage the cable, thus seriously affecting the construction progress.

[0003] The existing technology still lacks a power supply system that can be used across the road surface. In order to solve this problem, it is necessary to improve the existing technology. Summary of the invention

[0004] The invention discloses a road surface cross-type busbar power supply construction method. The power supply system can fully meet the power supply needs of marine ship engineering module construction without affecting vehicle passage and damaging the road surface.

[0005] To achieve the above purpose, the technical solution of the present invention is:

[0006] A method for constructing a road surface cross-type busbar power supply, including a power supply system and a method for protecting the system busbar in the system, wherein the power supply system includes a road surface load mechanism, an insulating cast body, a busbar, a distribution box, and an underground distribution box, wherein the road surface load mechanism includes a shell, an insulating cast body is connected to the shell through a vibration reduction mechanism, the insulating cast body and the shell both cross the road surface, and the busbar runs through the insulating cast body;

[0007] The two sides of the shell are connected with a junction box, the junction box is provided with an industrial connector, the busbar is electrically connected to the industrial connector through a flexible cable joint, and the industrial connector is electrically connected to the underground distribution box through a cable; the underground distribution box includes a distribution box body, and a bearing steel plate is provided on the top of the distribution box body, and the top of the bearing steel plate is flush with the ground.

[0008] Preferably, a water collecting tank is provided at the bottom of the distribution box body, the water collecting tank is connected to a water pump on the ground through a pipeline, a water level sensor is provided in the water collecting tank, and the water level sensor is electrically connected to a control circuit board;

[0009] The control circuit board is electrically connected to the water pump through a wire, the control circuit board is arranged in the distribution box body, and the control circuit board is also connected to a control panel arranged on the ground through a cable.

[0010] Preferably, the side cross-section of the shell is a trapezoidal structure, including a top plate, a ramp plate provided at the front and rear sides of the top plate and having a top fixedly connected to the end of the top plate, and a bottom plate opposite to the top plate and having two ends connected to the bottoms of the two ramp plates;

[0011] A plurality of vibration reduction units are arranged under the top plate, and the plurality of vibration reduction units are connected to each other along the direction of the road surface. The top plate and the bottom plate are connected through the vibration reduction units, and the bottom plate is used for laying on the road surface.

[0012] Preferably, the vibration reduction unit comprises a rectangular support steel pipe, which, together with the shell, spans across the road surface and is used to provide support for the top plate;

[0013] The rectangular support steel pipe is sleeved with a vibration-damping pipe with a rectangular cross section and two diagonal lines of the rectangle are arranged horizontally and vertically respectively, and the vibration-damping pipe is sleeved with a force transmission pipe with a rectangular cross section;

[0014] The four sides of the force transmission tube are respectively parallel to the four sides of the rectangular support steel tube. A cylindrical insulating cast body is arranged inside the force transmission tube. The outer wall of the insulating cast body is gap-matched with the inner wall of the force transmission tube. Both ends of the insulating cast body extend into the junction box.

[0015] The four edges of the vibration damping tube are all rounded, and the four rounded edges are respectively in contact with the inner wall of the rectangular support steel tube. A first vibration damping component is connected between the outer wall of the vibration damping tube and the inner wall of the rectangular support steel tube, and a second vibration damping component is connected between the vibration damping tube and the force transmission tube.

[0016] Preferably, the first vibration damping assembly comprises a plurality of first vibration damping springs arranged in a spiral shape, one end of the first vibration damping spring is connected to the outer wall of the vibration damping tube, and the other end is connected to the inner wall of the rectangular support steel tube in the transverse or longitudinal direction;

[0017] The elastic force of the first shock-absorbing spring satisfies that: when the top of the shell is subjected to an impact force obliquely downward, the top of the shell and the top of the rectangular supporting steel pipe are deformed to push the shock-absorbing tube to rotate. When the shock-absorbing tube rotates, each first shock-absorbing spring is stretched. After the impact force, the elastic force of each first shock-absorbing spring promotes deformation recovery.

[0018] Preferably, the second vibration damping assembly comprises a second vibration damping spring connected between the outer surfaces of the four side walls of the force transmission tube and the corresponding inner corners of the vibration damping tube;

[0019] The second shock-absorbing spring is arranged longitudinally or horizontally, and the stiffness of the upper and lower side walls of the force transmission tube is sufficient to overcome the elastic force of the second shock-absorbing spring A located at the top and the elastic force of the second shock-absorbing spring B located at the bottom, and the stiffness of the left and right side walls is sufficient to overcome the tension of the second shock-absorbing spring C located on the left and the tension of the second shock-absorbing spring D located on the right.

[0020] Preferably, adjacent rectangular support steel pipes are tightly fitted and welded, and the top and bottom ends of the rectangular support steel pipes are welded to the top plate and the bottom plate respectively.

[0021] Preferably, a plurality of triangular support ribs are welded between the ramp plate and the outer wall of the adjacent rectangular support steel tube, and the support ribs are made of low-carbon steel material or shape memory alloy material.

[0022] Preferably, the protection method for the system busbar includes the following:

[0023] The insulating cast body is a cylinder. When the vehicles passing on the road impact the top plate, the insulating cast body rotates relative to the force transmission tube or vibrates with the force transmission tube, and the force transmission tube cannot exert a destructive force on the insulating cast body. In addition, since the busbar is connected to the industrial connector through a flexible cable joint, the flexible cable joint has a length margin to cope with vibration, so the function of the busbar is not affected, and the insulating cast body itself is not damaged by vibration;

[0024] It is specifically reflected in the following two aspects:

[0025] (1) When the top plate is subjected to a vertical downward impact force, the combined action of the vibration-damping tube, the first vibration-damping spring, and the second vibration-damping spring promotes the deformation and restoration of the top plate and the rectangular supporting steel tube;

[0026] In this process, the rigidity of the upper and lower side walls of the force transmission tube is sufficient to overcome the elastic force of the second damping spring A located at the top and the elastic force of the second damping spring B located at the bottom, and the rigidity of the left and right side walls is sufficient to overcome the tension of the second damping spring C located at the left and the tension of the second damping spring D located at the right, so the insulating cast body and the busbar are not damaged;

[0027] (2) When the top plate is subjected to an oblique downward impact force, the vibration-damping tube rotates relative to the rectangular supporting steel tube under the push of the deformation of the top of the rectangular supporting steel tube, and each first vibration-damping spring is stretched. After the impact force, the vibration-damping tube is reset and pushes the top wall of the rectangular supporting steel tube and the top plate through the elastic force of each first vibration-damping spring, thereby promoting the reset of deformation. In this process, due to the inertia of the insulating cast body, the force transmission tube rotates relative to the insulating cast body and does not cause damage to the insulating cast body.

[0028] The beneficial effects of the present invention are:

[0029] The invention discloses a road surface cross-type busbar power supply construction method. The power supply system can fully meet the power supply needs of marine ship engineering module construction without affecting vehicle passage and damaging the road surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of a top view of the main structure of the present invention.

[0031] Figure 2 It is a schematic cross-sectional structure diagram of the present invention along the AA direction.

[0032] Figure 3 It is a front view structural schematic diagram of the main structure of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the underground distribution box of the present invention.

[0034] Figure 5 It is a schematic diagram of the principle of the busbar protection method (1) of the present invention.

[0035] Figure 6 It is a schematic diagram of the principle of the busbar protection method (2) of the present invention.

[0036] The figure shows: 01-pavement, 1-pavement load mechanism, 2-distribution box, 3-flexible cable connector, 4-insulating cast body, 5-slope plate, 6-top plate, 7-support rib plate, 8-rectangular supporting steel pipe, 9-vibration damping pipe, 10-rounded edge, 11-force transmission pipe, 12-busbar, 13-first vibration damping spring, 14-second vibration damping spring A, 15-second vibration damping spring C, 16-second vibration damping spring B, 17-second vibration damping spring D, 18-lifting ring, 19-distribution box body, 20-bearing steel plate, 21-inspection door, 22-wire outlet hole, 23-water collecting trough, 24-vertical downward force, 25-rotation direction, 26-oblique downward impact force. DETAILED DESCRIPTION

[0037] The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

[0038] The following embodiments may be understood as individually expressing a part of a local structure or method of the present invention, or may be understood as a combination of the embodiments to explain the connotation of a larger structure or method of the present invention.

[0039] Example 1

[0040] like Figure 1-6As shown, a method for constructing a pavement-spanning busbar power supply includes a power supply system and a method for protecting the system busbar in the system. The power supply system includes a pavement load mechanism 1, an insulating cast body 4, a busbar 12, a junction box 2, and an underground distribution box. The pavement load mechanism 1 includes a shell, and an insulating cast body 4 is connected to the shell through a vibration reduction mechanism. The insulating cast body 4 and the shell both span the pavement 01, and the busbar 12 runs through the insulating cast body 4.

[0041] A junction box 2 is connected to both sides of the shell, and the junction box 2 is provided with an industrial connector. The busbar 12 is electrically connected to the industrial connector through a flexible cable connector 3, and the industrial connector is electrically connected to the underground distribution box through a cable; the underground distribution box includes a distribution box body 19, and a bearing steel plate 20 is provided on the top of the distribution box body 19, and the top of the bearing steel plate 20 is flush with the ground.

[0042] In this embodiment, the pavement load mechanism 1 is laid on the pavement for passing vehicles, avoiding the tedious construction of digging grooves on the pavement and damage to the pavement; the underground distribution box has the conventional structure and function of the existing distribution box. In addition, a load-bearing steel plate 20 is provided on the top, which greatly reduces the impact of the distribution box set on the ground on traffic.

[0043] Example 2

[0044] like Figure 4 As shown, a water collecting tank 23 is provided at the bottom of the distribution box body 19, and the water collecting tank 23 is connected to a water pump (not shown) on the ground through a pipeline (not shown in the figure), and a water level sensor (not shown in the figure) is provided in the water collecting tank, and the water level sensor is electrically connected to a control circuit board (not shown in the figure), and the control circuit board is electrically connected to the water pump through a wire, and the control circuit board is arranged in the distribution box body (not shown in the figure), and the control circuit board is also connected to a control panel (not shown in the figure) arranged on the ground through a cable.

[0045] In this embodiment, when water accumulates in the sump, it can be drained by manual or automatic control. In addition, the underground distribution box should have sufficient structural strength and waterproof capability, and be equipped with relevant electrical units, and its related design is a common technology and will not be described in detail here.

[0046] Example 3

[0047] like Figure 1 , 2As shown, the side section of the shell is a trapezoidal structure, including a top plate 6, a ramp plate 5 provided on the front and rear sides of the top plate 6 and having its top fixedly connected to the end of the top plate 6, and a bottom plate (not marked in the figure) opposite to the top plate 6 and having its two ends connected to the bottoms of the two ramp plates 5. A plurality of vibration reduction units are provided under the top plate 6, and the plurality of vibration reduction units are connected to each other along the direction of the road surface. The top plate 6 is connected to the bottom plate through the vibration reduction units, and the bottom plate is used for laying on the road surface.

[0048] like Figure 1 , 2 As shown, the vibration reduction unit includes a rectangular support steel pipe 8, which spans the road surface 01 together with the shell and is used to provide support for the top plate 6. A vibration reduction tube 9 with a rectangular cross-section and two diagonals of the rectangle are respectively arranged horizontally and vertically. The vibration reduction tube 9 is sleeved with a force transmission tube 11 with a rectangular cross-section.

[0049] The four side surfaces of the force transmission tube 11 are respectively parallel to the four side surfaces of the rectangular support steel tube 8. A cylindrical insulating cast body 4 is arranged inside the force transmission tube 11. The outer wall of the insulating cast body 4 is gap-matched with the inner wall of the force transmission tube 11. Both ends of the insulating cast body 4 extend into the junction box. The four edges of the vibration damping tube 9 are all rounded. The four rounded edges 10 are respectively in contact with the inner wall of the rectangular support steel tube 8. A first vibration damping assembly is connected between the outer wall of the vibration damping tube 9 and the inner wall of the rectangular support steel tube 8. A second vibration damping assembly is connected between the vibration damping tube 9 and the force transmission tube 11.

[0050] like Figure 2 , 5 As shown in Figures 6 and 7, the first damping assembly includes a plurality of first damping springs 13 arranged in a spiral shape, one end of the first damping spring 13 is connected to the outer wall of the damping tube 9, and the other end is connected to the inner wall of the rectangular support steel tube 8 in the horizontal or vertical direction. The elastic force of the first damping spring 13 satisfies that: when the top of the shell is subjected to an impact force directed obliquely downward, the top of the shell and the top of the rectangular support steel tube 8 are deformed to push the damping tube to rotate, as shown in Figures 6 and 7. Figure 6 As shown, when the vibration damping tube 9 rotates, each first vibration damping spring 13 is stretched, and after the impact force, the elastic force of each first vibration damping spring 13 promotes deformation recovery.

[0051] like Figure 2 , 5As shown, the second shock-absorbing assembly includes a second shock-absorbing spring connected between the outer surface of the four side walls of the force transmission tube and the corresponding inner corner of the shock-absorbing tube 9, and the second shock-absorbing spring is arranged longitudinally or horizontally. The stiffness of the upper and lower side walls of the force transmission tube 11 is sufficient to overcome the elastic force of the second shock-absorbing spring A14 located at the top and the elastic force of the second shock-absorbing spring B16 located at the bottom, and the stiffness of the left and right side walls is sufficient to overcome the tension of the second shock-absorbing spring C15 located on the left and the tension of the second shock-absorbing spring D17 located on the right.

[0052] like Figure 2 As shown, adjacent rectangular support steel pipes 8 are tightly attached and welded, and the top and bottom ends of the rectangular support steel pipes 8 are welded to the top plate and the bottom plate respectively.

[0053] like Figure 1 , 2 As shown, a plurality of triangular support ribs 7 are welded between the ramp plate 5 and the outer wall of the adjacent rectangular support steel tube 8, and the support ribs 7 are made of low-carbon steel material or shape memory alloy material.

[0054] Example 4

[0055] like Figure 1-6 As shown, this embodiment discloses a method for protecting a busbar of a road surface cross-type busbar power supply system, including: the insulating cast body 4 is a cylinder, when the vehicle passing on the road surface causes an impact on the top plate, the insulating cast body 4 rotates relative to the power transmission tube 11 or vibrates with the power transmission tube 11, and the power transmission tube 11 cannot exert a destructive force on the insulating cast body 4. In addition, since the busbar 12 is connected to the industrial connector through the flexible cable connector 3, the flexible cable connector 3 has a length margin for dealing with vibration, so the function of the busbar 12 is not affected, and the insulating cast body 4 itself is not damaged by vibration; it is specifically embodied in the following two aspects:

[0056] (1) Figure 5 As shown, when the top plate 6 is subjected to a vertical downward impact force, the combined action of the vibration-damping tube 9, the first vibration-damping spring 13, and the second vibration-damping spring promotes the deformation and restoration of the top plate 6 and the rectangular support steel tube 8; in this process, because the stiffness of the upper and lower side walls of the force transmission tube 11 is sufficient to overcome the elastic force of the second vibration-damping spring A located at the top and the elastic force of the second vibration-damping spring B located at the bottom, and the stiffness of the left and right side walls is sufficient to overcome the tension of the second vibration-damping spring C located at the left and the tension of the second vibration-damping spring D located at the right, the insulating cast body 4 and the busbar 12 are not damaged;

[0057] (3) Figure 6As shown, when the top plate 6 is subjected to an oblique downward impact force 26, the vibration-damping tube 9 rotates relative to the rectangular supporting steel tube 8 under the push of the deformation of the top of the rectangular supporting steel tube 8, and each first vibration-damping spring 13 is stretched. After the impact force, the vibration-damping tube 9 is reset and pushes the top wall of the rectangular supporting steel tube 8 and the top plate 6 through the elastic force of each first vibration-damping spring 13, thereby promoting the deformation reset. In this process, due to the inertia of the insulating cast body 4, the force transmission tube 11 rotates relative to the insulating cast body 4, and will not cause damage to the insulating cast body 4.

[0058] It should be noted that, during the use of the present invention, due to the vertical or oblique downward impact force, the top plate and the top wall of the rectangular support steel pipe will be deformed to a certain extent, and the deformation includes elastic deformation and plastic deformation, wherein the elastic force of the first damping spring is set to promote the reset of a certain degree of plastic deformation caused by the oblique impact force; and the combined effect of the damping tube 9, the first damping spring 13, and the second damping spring is set to promote the reset of a certain degree of plastic deformation caused by the vertical impact force. The above settings can determine the structural parameters of the damping tube or spring according to experiments. Among them, when the oblique downward force impacts, the top plate and the top wall of the rectangular support steel pipe are deformed, and although the damping tube rotates, the top chamfered part still keeps in contact with the rectangular support steel pipe. Under the tension of multiple first damping springs, the damping effect of the oblique impact force is achieved through its own torsion. Due to the complexity of transporting materials in the modular construction of marine ship engineering, this damping effect against the oblique impact force is particularly important to ensure the safety of the busbar.

Claims

1. A road surface cross-type busbar power supply construction method, characterized by: The invention comprises a power supply system and a protection method for a busbar of the system in the system. The power supply system comprises a pavement load mechanism, an insulating cast body, a busbar, a distribution box, and an underground distribution box. The pavement load mechanism comprises a shell, an insulating cast body is connected to the shell through a vibration reduction mechanism, the insulating cast body and the shell both span the pavement, and a busbar runs through the insulating cast body. The two sides of the shell are connected with a junction box, the junction box is provided with an industrial connector, the busbar is electrically connected to the industrial connector through a flexible cable joint, and the industrial connector is electrically connected to the underground distribution box through a cable; the underground distribution box includes a distribution box body, and a bearing steel plate is provided on the top of the distribution box body, and the top of the bearing steel plate is flush with the ground.

2. A road surface cross-type busbar power supply construction method as claimed in claim 1, characterized in that: A water collecting tank is provided at the bottom of the distribution box body, and the water collecting tank is connected to a water pump on the ground through a pipeline. A water level sensor is provided in the water collecting tank, and the water level sensor is electrically connected to a control circuit board; The control circuit board is electrically connected to the water pump through a wire, the control circuit board is arranged in the distribution box body, and the control circuit board is also connected to a control panel arranged on the ground through a cable.

3. A road surface cross-type busbar power supply construction method as claimed in claim 2, characterized in that: The side cross-section of the shell is a trapezoidal structure, including a top plate, a ramp plate provided at the front and rear sides of the top plate and having a top fixedly connected to the end of the top plate, and a bottom plate opposite to the top plate and having two ends connected to the bottoms of the two ramp plates; A plurality of vibration reduction units are arranged under the top plate, and the plurality of vibration reduction units are connected to each other along the direction of the road surface. The top plate and the bottom plate are connected through the vibration reduction units, and the bottom plate is used for laying on the road surface.

4. A road surface cross-type busbar power supply construction method as claimed in claim 3, characterized in that: The vibration reduction unit comprises a rectangular support steel pipe, which, together with the shell, spans across the road surface and is used to provide support for the top plate; The rectangular support steel pipe is sleeved with a vibration-damping pipe with a rectangular cross section and two diagonal lines of the rectangle are arranged horizontally and vertically respectively, and the vibration-damping pipe is sleeved with a force transmission pipe with a rectangular cross section; The four sides of the force transmission tube are respectively parallel to the four sides of the rectangular support steel tube. A cylindrical insulating cast body is arranged inside the force transmission tube. The outer wall of the insulating cast body is gap-matched with the inner wall of the force transmission tube. Both ends of the insulating cast body extend into the junction box. The four edges of the vibration damping tube are all rounded, and the four rounded edges are respectively in contact with the inner wall of the rectangular support steel tube. A first vibration damping component is connected between the outer wall of the vibration damping tube and the inner wall of the rectangular support steel tube, and a second vibration damping component is connected between the vibration damping tube and the force transmission tube.

5. A road surface cross-type busbar power supply construction method as claimed in claim 4, characterized in that: The first vibration reduction assembly includes a plurality of first vibration reduction springs arranged in a spiral shape, one end of the first vibration reduction spring is connected to the outer wall of the vibration reduction tube, and the other end is connected to the inner wall of the rectangular support steel tube in the horizontal or vertical direction; The elastic force of the first shock-absorbing spring satisfies that: when the top of the shell is subjected to an impact force obliquely downward, the top of the shell and the top of the rectangular supporting steel pipe are deformed to push the shock-absorbing tube to rotate. When the shock-absorbing tube rotates, each first shock-absorbing spring is stretched. After the impact force, the elastic force of each first shock-absorbing spring promotes deformation recovery.

6. A road surface cross-type busbar power supply construction method as claimed in claim 5, characterized in that: The second vibration damping assembly includes a second vibration damping spring connected between the outer surfaces of the four side walls of the force transmission tube and the corresponding inner corners of the vibration damping tube; The second shock-absorbing spring is arranged longitudinally or horizontally, and the stiffness of the upper and lower side walls of the force transmission tube is sufficient to overcome the elastic force of the second shock-absorbing spring A located at the top and the elastic force of the second shock-absorbing spring B located at the bottom, and the stiffness of the left and right side walls is sufficient to overcome the tension of the second shock-absorbing spring C located on the left and the tension of the second shock-absorbing spring D located on the right.

7. A road surface cross-type busbar power supply construction method as claimed in claim 6, characterized in that: Adjacent rectangular support steel pipes are tightly fitted and welded, and the top and bottom ends of the rectangular support steel pipes are welded to the top plate and the bottom plate respectively.

8. A road surface cross-type busbar power supply construction method as claimed in claim 7, characterized in that: A plurality of triangular supporting ribs are welded between the ramp plate and the outer wall of the adjacent rectangular supporting steel pipe, and the supporting ribs are made of low-carbon steel material or shape memory alloy material.

9. A road surface cross-type busbar power supply construction method as claimed in claim 8, characterized in that: The protection methods for the system busbar include the following: The insulating cast body is a cylinder. When the vehicles passing on the road impact the top plate, the insulating cast body rotates relative to the force transmission tube or vibrates with the force transmission tube, and the force transmission tube cannot exert a destructive force on the insulating cast body. In addition, since the busbar is connected to the industrial connector through a flexible cable joint, the flexible cable joint has a length margin to cope with vibration, so the function of the busbar is not affected, and the insulating cast body itself is not damaged by vibration; It is specifically reflected in the following two aspects: (1) When the top plate is subjected to a vertical downward impact force, the combined action of the vibration-damping tube, the first vibration-damping spring, and the second vibration-damping spring promotes the deformation and restoration of the top plate and the rectangular supporting steel tube; In this process, the rigidity of the upper and lower side walls of the force transmission tube is sufficient to overcome the elastic force of the second damping spring A located at the top and the elastic force of the second damping spring B located at the bottom, and the rigidity of the left and right side walls is sufficient to overcome the tension of the second damping spring C located at the left and the tension of the second damping spring D located at the right, so the insulating cast body and the busbar are not damaged; (2) When the top plate is subjected to an oblique downward impact force, the vibration-damping tube rotates relative to the rectangular supporting steel tube under the push of the deformation of the top of the rectangular supporting steel tube, and each first vibration-damping spring is stretched. After the impact force, the vibration-damping tube is reset and pushes the top wall of the rectangular supporting steel tube and the top plate through the elastic force of each first vibration-damping spring, thereby promoting the reset of deformation. In this process, due to the inertia of the insulating cast body, the force transmission tube rotates relative to the insulating cast body and does not cause damage to the insulating cast body.

Images