Damping device and wall bushing damping structure

Abstract

The invention relates to the technical field of damping devices, in particular to a damping device and a wall bushing damping structure, the damping device comprises a damping sleeve and a connecting mandrel, a damping cavity and a load buffer cavity are arranged in the damping sleeve, a load buffer piece is arranged in the load buffer cavity, and a buffer solution and a buffer piston are arranged in the damping cavity; the inner connecting end of the connecting mandrel is connected with the load buffering cavity through the load buffering piece, and the connecting mandrel is sleeved with the buffering piston. The self weight of the horizontal cantilever structure is loaded through the damping device, initial rigidity is provided for the horizontal cantilever structure, daily slight vibration can be absorbed through the load buffering piece, and the anti-seismic performance of the horizontal cantilever structure is improved; in the earthquake process, damping force is generated when the load buffering piece is combined with the buffering piston to move in the buffering solution, the double-layer damping effect on the horizontal cantilever in the earthquake process is achieved, the anti-seismic capacity of the horizontal cantilever structure is further improved, plastic deformation is avoided, cost is reduced, and meanwhile the service life is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of shock absorbing devices, and in particular to a shock absorbing device and a wall bushing shock absorbing structure. Background Art

[0002] During an earthquake, electrical equipment with long cantilever structures, such as lightning arresters, transformer disconnectors and other equipment, is severely damaged. The high, large, flexible and heavy structural characteristics of electrical equipment with long cantilever structures, especially for extra-high voltage and UHV electrical equipment, are more significant, which correspondingly increases the failure probability of the structure under the action of an earthquake. For example, equipment such as lightning arresters, transformer disconnectors and other equipment, damage to the equipment leads to functional failure of the substation, which not only causes serious economic losses, but also increases the difficulty and cost of post-disaster reconstruction.

[0003] In order to improve the seismic resistance of long cantilever structure electrical equipment, the performance of the material or structural design of the electrical equipment itself is usually improved. However, this method is often costly and has limited performance improvement effects and cannot meet actual usage requirements.

[0004] Alternatively, by adding shock-absorbing devices to the electrical equipment, the shaking amplitude of the electrical equipment can be reduced by the shock-absorbing devices during an earthquake. The shock-absorbing devices are usually lead metal dampers. Under the action of horizontal earthquakes, when the core shaft drives the lead metal to move, the movement of the lead metal is restricted, thereby shearing the lead metal and dissipating the earthquake energy. However, the lead metal damper is prone to plastic deformation when it is subjected to large loads for a long time, and it is not easy to recover, which reduces the shock-absorbing effect and cannot meet actual use requirements.

[0005] The Chinese invention patent application with application number 202310811554.9 provides a shock absorbing device, which consumes energy through the sliding friction between the friction energy absorbing ring and the inner wall of the sleeve when the piston rod moves by adding a friction energy absorbing ring in the sleeve. Although it reduces the load-bearing friction of the lead metal and the deformation degree of the lead metal, it still cannot overcome the deficiency of plastic deformation of the lead metal. In addition, the shock absorbing device is suitable for column-type long cantilever electrical equipment. The axis of the shock absorbing device is vertically arranged and does not bear the gravity of the electrical equipment. Therefore, it is not suitable for long cantilever electrical equipment arranged in the horizontal direction. Summary of the invention

[0006] The purpose of the present invention is to provide a shock absorbing device and a wall sleeve shock absorbing structure to solve the technical problem that the current shock absorbing device is not suitable for shock absorbing of the horizontal cantilever structure. The present invention can further improve the seismic resistance of the horizontal cantilever structure. At the same time, the structure is simple, plastic deformation is avoided, and the cost is reduced while the service life is increased to meet the shock absorption requirements of the horizontal cantilever.

[0007] The present invention solves the above-mentioned technical problems by: A shock absorbing device comprises a shock absorbing sleeve and a connecting core shaft, wherein a shock absorbing chamber and a load buffer chamber are arranged in the shock absorbing sleeve, wherein the shock absorbing sleeve, the shock absorbing chamber and the load buffer chamber are coaxially arranged, wherein a load buffering member is arranged in the load buffer chamber, and wherein a buffer and a buffer piston are arranged in the shock absorbing chamber; The outer end of the connecting core shaft is located outside the shock-absorbing sleeve, and the inner end of the connecting core shaft extends through the shock-absorbing cavity to the load buffer cavity. The inner end of the connecting core shaft is connected to the load buffer cavity through a load buffer member, and the buffer piston is sleeved on the connecting core shaft.

[0008] It is further defined that the outer diameter of the buffer piston is smaller than the inner diameter of the shock absorbing chamber.

[0009] It is further defined that a buffer through hole is provided on the buffer piston.

[0010] It is further defined that the number of the buffer through holes is multiple, and the multiple buffer through holes are arranged in an array.

[0011] It is further defined that the connecting core shaft is coaxially arranged with the shock absorbing sleeve, the inner end of the connecting core shaft is provided with a movable baffle, the connecting core shaft is connected to one end of the load buffer through the movable baffle, and the other end of the load buffer is connected to the load buffer cavity.

[0012] It is further defined that a fixed baffle is provided inside the shock-absorbing sleeve, the outer wall of the fixed baffle is sealedly connected to the inner wall of the shock-absorbing sleeve, the fixed baffle isolates the interior of the shock-absorbing sleeve into a shock-absorbing chamber and a load buffer chamber, the fixed baffle is located between the load buffer and the buffer piston, and the inner end of the connecting core shaft passes through the fixed baffle and is sealedly connected to the fixed baffle.

[0013] It is further defined that the shock absorbing device also includes a connecting rod, the connecting rod is connected to the shock absorbing sleeve, the connecting rod and the shock absorbing sleeve are coaxially arranged, and the connecting rod is close to the load buffer cavity.

[0014] A wall-penetrating sleeve shock-absorbing structure, based on the above-mentioned shock-absorbing device, comprises a shock-absorbing unit connected between an installation inner frame and a valve hall wall; the shock-absorbing unit is arranged on the peripheral side of the installation inner frame, and the shock-absorbing unit comprises a plurality of shock-absorbing devices.

[0015] It is further defined that the number of the shock absorbing units is four, the four shock absorbing units are respectively arranged at the corresponding top angle positions of the installation inner frame, the four shock absorbing units are symmetrically arranged about the vertical axis of the installation inner frame, and the four shock absorbing units are symmetrically arranged about the horizontal axis of the installation inner frame.

[0016] It is further defined that the shock absorbing unit includes three shock absorbing devices, two of which are connected to the transverse frame on which the inner frame is installed, and one of which is connected to the vertical frame on which the inner frame is installed.

[0017] The beneficial effects of the present invention are: 1. The present invention provides a shock absorbing device, which loads the deadweight of a horizontal cantilever structure through the shock absorbing device, thereby providing initial stiffness for the horizontal cantilever structure, and can absorb daily slight vibrations through a load buffer, thereby improving the seismic performance of the horizontal cantilever structure; at the same time, during an earthquake, the load buffer generates a damping force when the load buffer is combined with a buffer piston moving in the buffer, thereby achieving a double-layer shock absorbing effect on the horizontal cantilever during an earthquake, thereby further improving the seismic performance of the horizontal cantilever structure; at the same time, the structure is simple, plastic deformation is avoided, and cost is reduced while increasing service life, thereby meeting the shock absorbing requirements of the horizontal cantilever.

[0018] 2. The present invention forms a shock absorbing unit through multiple shock absorbing devices, and then connects the wall sleeve of the long horizontal cantilever structure through multiple shock absorbing units. The shock absorbing unit is connected to the peripheral side of the installation inner frame to load the deadweight of the wall sleeve and maintain the normal operation of the wall sleeve. During an earthquake, it can not only absorb the left and right shaking of the wall sleeve caused by horizontal earthquakes, but also absorb the up and down shaking of the wall sleeve caused by vertical earthquakes, thereby improving the shock absorbing reliability and shock absorbing effect and meeting the shock absorbing requirements of the horizontal cantilever structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the cross section of the shock absorbing device in the embodiment of the present invention.

[0020] Figure 2 It is a front view of the wall sleeve shock-absorbing structure in an embodiment of the present invention.

[0021] Figure 3 It is a three-dimensional diagram of the shock-absorbing structure of the wall sleeve in an embodiment of the present invention.

[0022] In the figure, 10-shock-absorbing sleeve; 11-fixed baffle; 12-sealed end cover; 20-shock-absorbing chamber; 21-buffer; 22-buffer piston; 23-buffer through hole; 30-load buffer chamber; 31-load buffer member; 40-connecting core shaft; 41-movable baffle; 50-connecting rod; 60-installation inner frame; 70-valve hall wall; 80-shock-absorbing unit; 90-wall sleeve. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0024] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0025] Example 1 refer to Figure 1 The present invention provides a shock absorbing device, including a shock absorbing sleeve 10, a load buffer 31, a buffer 21, a buffer piston 22 and a connecting core shaft 40; the load buffer 31, the buffer 21 and the buffer piston 22 are all located inside the shock absorbing sleeve 10, one end of the connecting core shaft 40 is located outside the shock absorbing sleeve 10, called the external end of the connecting core shaft 40, and the external end of the connecting core shaft 40 is connected to the external structure; the other end of the connecting core shaft 40 extends to the inside of the shock absorbing sleeve 10, called the internal end of the connecting core shaft 40, and the internal end of the connecting core shaft 40 is connected to the inside of the shock absorbing sleeve 10 through the load buffer 31, preferably the connecting core shaft 40 is coaxially connected with the shock-absorbing sleeve 10. The present invention adopts a coaxially arranged connecting core shaft 40 and the shock-absorbing sleeve 10, and a load buffer 31 is arranged between the connecting core shaft 40 and the shock-absorbing sleeve 10. The load buffer 31 can absorb daily slight vibrations, thereby improving the seismic performance of the horizontal cantilever structure; at the same time, during an earthquake, the load buffer generates a damping force when the buffer piston moves in the buffer, thereby achieving a double-layer shock-absorbing effect on the horizontal cantilever during an earthquake, further improving the seismic resistance of the horizontal cantilever structure, and at the same time, the structure is simple, avoids plastic deformation, reduces costs, and increases service life, thereby meeting the shock-absorbing requirements of the horizontal cantilever.

[0026] Among them, in order to seal the buffer solution 21, a shock absorbing chamber 20 is set in the shock absorbing sleeve 10, and the buffer solution 21 is filled in the shock absorbing chamber 20. The inner end of the connecting core shaft 40 passes through the buffer solution 21 and extends to the outside of the shock absorbing chamber 20. A buffer piston 22 is set in the shock absorbing chamber 20, and the buffer piston 22 is sleeved on the connecting core shaft 40. When the connecting core shaft 40 drives the buffer piston 22 to move along the shock absorbing chamber 20, a damping force is generated to achieve a shock absorbing effect; a movable baffle 41 is set at one end of the connecting core shaft 40 located in the shock absorbing sleeve 10, and the load buffer 31 is located between the movable baffle 41 and the inner side of the shock absorbing sleeve 10, that is, the load buffer 31 is located on one side of the movable baffle 41, and the buffer solution 21 is located on the other side of the movable baffle 41. The present invention utilizes the movable baffle 41 structure to respectively set the load buffer 31 and the buffer solution 21 on both sides thereof, which can achieve a double-layer shock absorbing effect, ensure the stability of the shock absorbing effect, and prevent the unilateral failure of the load buffer 31 from causing the failure of the overall buffer device.

[0027] Specifically, the shock-absorbing sleeve 10 is a hollow structure. The shock-absorbing sleeve 10 can be selected as a rectangular parallelepiped or a cylinder. The present invention is described by taking the shock-absorbing sleeve 10 of a cylindrical structure as an example.

[0028] like Figure 1 As shown, the shock-absorbing sleeve 10 includes a cylindrical shell and a sealing end cap 12, the sealing end cap 12 is sealed and connected to the cylindrical shell, the sealing end cap 12 is sleeved on the outside of the connecting core shaft 40 and is sealed and connected to the connecting core shaft 40, and the external end of the connecting core shaft 40 is located on the outside of the sealing end cap 12. In a specific embodiment of the present application, the sealing end cap 12 is connected to the cylindrical shell by threads or the sealing end cap 12 is pressed into the end of the cylindrical shell by interference fit.

[0029] A fixed baffle 11 is also provided inside the shock-absorbing sleeve 10, and the fixed baffle 11 is used to divide the interior of the shock-absorbing sleeve 10 into a load buffer chamber 30 and a shock-absorbing chamber 20. A load buffer 31 is located in the load buffer chamber 30, and one end of the load buffer 31 is connected to the inner end of the load buffer chamber 30 of the shock-absorbing sleeve 10, and the other end of the load buffer 31 is connected to the inner end of the connecting core shaft 40, so that when the connecting core shaft 40 and the shock-absorbing sleeve 10 are relatively displaced, the load buffer 31 can offset the impact of vibration through compression and stretching.

[0030] Furthermore, after the earthquake ends, the load buffer 31 can drive the horizontal cantilever to return to its initial position, thereby achieving reset and further improving the earthquake resistance of the horizontal cantilever.

[0031] At the same time, when the shock absorbing device is connected to the horizontal cantilever, the load buffer 31 can overcome the deadweight of the horizontal cantilever, and can also overcome the slight shaking caused by external influences, thereby avoiding plastic deformation.

[0032] Preferably, the load buffer 31 is an elastic object such as a spring or a rubber pad, preferably a spring, which increases the service life and has a simple structure; at this time, both ends of the spring are fixedly connected to the corresponding load buffer cavity 30 and the connecting core shaft 40.

[0033] Preferably, in order to improve the shock absorbing effect and increase the service life of the load buffer 31, the load buffer 31 is preferably coaxially arranged with the shock absorbing sleeve 10 so that the force is more uniform.

[0034] In order to further improve the connection reliability and stability between the load buffer 31 and the connecting core shaft 40, it is preferred to set a movable baffle 41 at the inner end of the connecting core shaft 40, and the connecting core shaft 40 is fixedly connected to the corresponding end of the load buffer 31 through the movable baffle 41; at the same time, the movable baffle 41 matches the inner wall of the load buffer cavity 30, thereby reducing the deviation of the connecting core shaft 40 from the axis of the shock-absorbing sleeve 10 during movement, reducing increased losses, and improving service life.

[0035] The fixed baffle 11 is sleeved on the outside of the connecting core shaft 40 and is sealed with the connecting core shaft 40. After the fixed baffle 11 is installed inside the shock-absorbing sleeve 10, the outer wall of the fixed baffle 11 is welded to the inner wall of the shock-absorbing sleeve 10 to ensure the sealing of the shock-absorbing chamber 20, avoid leakage, and ensure the shock-absorbing effect.

[0036] Similarly, the fixed baffle 11 is coaxially arranged with the shock-absorbing sleeve 10, and the movable baffle 41 is coaxially arranged with the shock-absorbing sleeve 10, so as to ensure stable and reliable movement.

[0037] It is further explained that the buffer piston 22 can move along its axial direction in the shock absorbing chamber 20, and the shock absorbing effect is achieved through the damping force generated by the flow of liquid in the shock absorbing chamber 20. Therefore, there is a flow channel between the buffer piston 22 and the shock absorbing chamber 20. Preferably, the buffer piston 22 is coaxially connected to the shock absorbing sleeve 10.

[0038] Optionally, the inner diameter of the buffer piston 22 is smaller than the inner diameter of the shock absorbing chamber 20, so that there is a flow gap between the buffer piston 22 and the shock absorbing chamber 20. Therefore, when the buffer piston 22 moves, the buffer 21 on the outside of the buffer piston 22 will form a boundary layer. The relative movement between this layer of buffer 21 and the surface of the buffer piston 22 will generate friction, thereby forming resistance; at the same time, the movement of the buffer piston 22 causes the buffer 21 to be forced to flow, and the viscosity of the buffer 21 will generate force resistance, preventing the acceleration of the buffer piston 22 from changing, thereby generating a damping force and achieving a shock absorbing effect.

[0039] Preferably, a buffer through hole 23 is provided on the buffer piston 22, connecting the buffer solution 21 on opposite sides of the buffer piston 22. Changes in the flow speed and direction of the buffer solution 21 will generate viscous force, causing resistance to the buffer piston 22. At the same time, when the buffer piston 22 moves quickly, the inertia effect in the buffer solution 21 will also generate resistance, increasing the damping of the piston, thereby generating a damping force and achieving a shock absorbing effect.

[0040] In order to ensure that the damping force generated by the buffer piston 22 during movement is stable and uniform, it is further preferred that the number of the buffer through holes 23 is at least two, for example, three, four or more, and all the buffer through holes 23 are arranged at equal intervals around the axis of the buffer piston 22. Taking four buffer through holes 23 as an example, the four buffer through holes 23 are arranged in a circle at equal intervals around the axis of the buffer piston 22.

[0041] The buffer piston 22 is tightly connected to the connecting core shaft 40, or a fixed connection can be selected to ensure that the buffer piston 22 can move synchronously with the connecting core shaft 40, and the connecting core shaft 40 can also effectively transmit the damping force during an earthquake to achieve effective shock absorption.

[0042] The buffer solution 21 is filled in the shock absorbing chamber 20 to prevent air from entering. Therefore, after the buffer solution 21 is filled, the shock absorbing chamber 20 is sealed with the sealing end cover 12 to prevent liquid leakage and air from entering, thereby ensuring the damping and shock absorbing effect.

[0043] The buffer 21 can be selected from viscous liquids such as mineral oil, glycerin, silicone oil, etc. The buffer 21 is described using silicone oil as an example, so that the damping force provided by the buffer piston 22 during movement is more stable and reliable.

[0044] When in use, the external end of the connecting core shaft 40 and one end of the shock-absorbing sleeve 10 are connected between the horizontal cantilever and the fixed structure to provide a shock-absorbing effect for the horizontal cantilever and improve the reliability of the horizontal cantilever.

[0045] Preferably, in order to facilitate connection, a connecting rod 50 is provided at the end of the shock-absorbing sleeve 10 , and the connecting rod 50 is coaxially arranged with the shock-absorbing sleeve 10 and the connecting core shaft 40 .

[0046] The shock absorbing device provided in this embodiment can overcome the weight of the horizontal cantilever structure itself while providing stable and reliable shock absorbing requirements for it.

[0047] Example 2 refer to Figure 2 and Figure 3Based on the shock-absorbing device provided in Example 1, this embodiment provides a wall sleeve shock-absorbing structure, including a shock-absorbing unit 80 connected between the installation inner frame 60 and the valve hall wall 70, the shock-absorbing unit 80 is composed of a plurality of shock-absorbing devices, the shock-absorbing devices are connected between the installation inner frame 60 and the valve hall wall 70, and the wall sleeve 90 is coaxially connected to the installation inner frame 60; the shock-absorbing device is used to reduce the impact of the shaking of the valve hall wall 70 on the wall sleeve 90 during an earthquake or external shaking, thereby reducing the failure of the wall sleeve 90 and the service life of the wall sleeve 90, and further reducing the difficulty and cost of post-disaster repair.

[0048] Specifically, there are multiple shock-absorbing units 80, and the multiple shock-absorbing units 80 are arranged on the surrounding side of the installation inner frame 60 for stably connecting the installation inner frame 60; in order to reduce the difficulty of installation while ensuring the shock-absorbing effect, the preferred number of the shock-absorbing units 80 is four, and the four shock-absorbing units 80 are arranged at the four top corners of the installation inner frame 60.

[0049] The shock absorbing unit 80 is explained by taking the example of including three shock absorbing devices. At this time, two shock absorbing devices are detachably connected to the horizontal frame of the inner frame 60, one shock absorbing device is detachably connected to the vertical frame of the inner frame 60, and the two shock absorbing devices located in the horizontal frame of the inner frame 60 are connected to the corresponding side ends of the valve hall wall 70.

[0050] At this time, four shock absorbing units 80 are respectively connected to the upper left corner, the upper right corner, the lower right corner and the lower left corner of the mounting inner frame 60 .

[0051] Preferably, the shock absorbing unit 80 located at the upper left corner is symmetrically arranged with the shock absorbing unit 80 located at the upper right corner about the vertical axis of the installation inner frame 60, the shock absorbing unit 80 located at the upper right corner is symmetrically arranged with the shock absorbing unit 80 located at the lower right corner about the horizontal axis of the installation inner frame 60, the shock absorbing unit 80 located at the lower right corner is symmetrically arranged with the shock absorbing unit 80 located at the lower left corner about the vertical axis of the installation inner frame 60, and the shock absorbing unit 80 located at the lower left corner is symmetrically arranged with the shock absorbing unit 80 located at the upper left corner about the horizontal axis of the installation inner frame 60, thereby providing stable and reliable shock absorption for the wall sleeve.

[0052] During the installation process, the connecting rod 50 can be selected to be detachably connected to the valve hall wall 70, and the external end of the connecting core shaft 40 can be detachably connected to the installation inner frame 60. The axis of the shock-absorbing device located on the left and right sides of the installation inner frame 60 is preferably tilted in the horizontal direction, so that the shock-absorbing device on the side of the installation inner frame 60 provides shock absorption in the vertical direction while providing shock absorption in the horizontal direction; similarly, the axis of the shock-absorbing device located on the upper and lower sides of the installation inner frame 60 is tilted in the vertical direction, so that the corresponding shock-absorbing device provides shock absorption in the horizontal direction while providing shock absorption in the vertical direction, thereby further improving the shock absorption effect.

[0053] Among them, the shock-absorbing device located at the top and the shock-absorbing device located at the bottom mainly overcome the deadweight of the wall sleeve 90 through the stretching and compression of the load buffer 31, thereby ensuring the stability of the wall sleeve 90 in normal operation; the shock-absorbing devices located on the left and right sides of the installation inner frame 60 are mainly used to overcome the shaking of the wall sleeve 90 during horizontal earthquakes.

[0054] During an earthquake, the valve hall wall 70 will cause the wall sleeve 90 to shake. At this time, the shock-absorbing device on the outside of the inner frame 60 will cause relative displacement between the connecting core shaft 40 and the shock-absorbing sleeve 10. The elastic force of the load buffer 31 itself and the damping force generated when the buffer piston 22 moves in the shock-absorbing fluid 21 overcome the shaking of the wall sleeve caused by the inner frame 60, offset the shaking of the inner frame 60 symmetrically from the top and bottom and left and right directions, improve the shock-absorbing effect of the wall sleeve 90, meet the seismic requirements of the wall sleeve 90, have a simple structure, low cost, and are convenient for maintenance, disassembly, assembly and replacement, while meeting the seismic requirements of the horizontal cantilever structure.

[0055] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some or all of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the present invention.

Claims

1. A shock absorbing device, characterized in that: The invention comprises a shock absorbing sleeve (10) and a connecting core shaft (40), wherein a shock absorbing chamber (20) and a load buffer chamber (30) are arranged in the shock absorbing sleeve (10), the shock absorbing chamber (20) and the load buffer chamber (30) are all coaxially arranged, a load buffer member (31) is arranged in the load buffer chamber (30), and a buffer (21) and a buffer piston (22) are arranged in the shock absorbing chamber (20); The external end of the connecting core shaft (40) is located outside the shock-absorbing sleeve (10), the internal end of the connecting core shaft (40) passes through the shock-absorbing cavity (20) and extends to the load buffer cavity (30), the internal end of the connecting core shaft (40) is connected to the load buffer cavity (30) via a load buffer member (31), and the buffer piston (22) is sleeved on the connecting core shaft (40).

2. The shock absorbing device according to claim 1, characterized in that: The outer diameter of the buffer piston (22) is smaller than the inner diameter of the shock absorbing chamber (20).

3. The shock absorbing device according to claim 1, characterized in that: The buffer piston (22) is provided with a buffer through hole (23).

4. The shock absorbing device according to claim 3, characterized in that: The number of the buffer through holes (23) is multiple, and the multiple buffer through holes (23) are arranged in an array.

5. The shock absorbing device according to claim 3, characterized in that: The connecting core shaft (40) is coaxially arranged with the shock absorbing sleeve (10); a movable baffle (41) is arranged at the inner end of the connecting core shaft (40); the connecting core shaft (40) is connected to one end of the load buffer (31) via the movable baffle (41); and the other end of the load buffer (31) is connected to the load buffer cavity (30).

6. The shock absorbing device according to claim 5, characterized in that: A fixed baffle (11) is arranged inside the shock-absorbing sleeve (10); the outer wall of the fixed baffle (11) is sealedly connected to the inner wall of the shock-absorbing sleeve (10); the fixed baffle (11) isolates the interior of the shock-absorbing sleeve (10) into a shock-absorbing chamber (20) and a load buffer chamber (30); the fixed baffle (11) is located between the load buffer (31) and the buffer piston (22); and the inner end of the connecting core shaft (40) passes through the fixed baffle (11) and is sealedly connected to the fixed baffle (11).

7. The shock absorbing device according to claim 6, characterized in that: The shock absorbing device further comprises a connecting rod (50), wherein the connecting rod (50) is connected to the shock absorbing sleeve (10), the connecting rod (50) and the shock absorbing sleeve (10) are coaxially arranged, and the connecting rod (50) is close to the load buffer cavity (30).

8. A wall bushing shock absorbing structure, characterized in that: The shock absorbing device according to any one of claims 1 to 7 comprises a shock absorbing unit (80) connected between an installation inner frame (60) and a valve hall wall (70); the shock absorbing unit (80) is arranged on the peripheral side of the installation inner frame (60), and the shock absorbing unit (80) comprises a plurality of shock absorbing devices.

9. The wall bushing shock absorbing structure according to claim 8, characterized in that: The number of the shock absorbing units (80) is four, and the four shock absorbing units (80) are respectively arranged at corresponding vertex positions of the installation inner frame (60), the four shock absorbing units (80) are symmetrically arranged about the vertical axis of the installation inner frame (60), and the four shock absorbing units (80) are symmetrically arranged about the horizontal axis of the installation inner frame (60).

10. The wall bushing shock absorbing structure according to claim 9, characterized in that: The shock absorbing unit (80) comprises three shock absorbing devices, two of which are connected to a horizontal frame on which the inner frame (60) is installed, and one of which is connected to a vertical frame on which the inner frame (60) is installed.

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