Anti-magnetic vibration isolation power equipment foundation protection device

Abstract

The invention relates to an anti-magnetic vibration isolation power equipment foundation protection device which is arranged in a foundation pit and comprises an air cushion system, a hydraulic inflation damper and a steel ball set. The air cushion system comprises a plurality of first air cushion structures evenly arranged in the circumferential direction of the power equipment foundation and at least one second air cushion structure arranged at the bottom of the power equipment foundation. The first air cushion structure and the second air cushion structure each comprise an air cushion body, top plates arranged at the two ends of the air cushion body and a waist ring arranged on the air cushion body in a sleeving mode. The shock absorbers are arranged in the air cushion bodies of the first air cushion structure and the second air cushion structure, and the two ends of the shock absorbers are fixedly connected with the top plates at the two ends of the air cushion bodies correspondingly; the steel ball set is arranged in the air cushion body of the first air cushion structure and comprises a long rope connected with top plates at the two ends of the air cushion body and a plurality of steel balls hung on the long rope. During vibration, the air cushion body and the shock absorber are synchronously compressed and rebound to counteract vibration, and the steel balls collide with each other to counteract vibration.

Description

Technical Field

[0001] The invention relates to a magnetic-proof and vibration-insulating power equipment foundation protection device, belonging to the technical field of foundation protection devices. Background Art

[0002] During operation, power equipment is often affected by electromagnetic interference signals. First, electromagnetic interference may cause abnormal operation of power equipment, bringing economic and safety risks that cannot be ignored. Second, electromagnetic interference may cause misoperation of power equipment, thereby causing damage to the equipment or working environment. Finally, electromagnetic interference may also have an adverse effect on the life of power equipment. Frequent electromagnetic interference will cause changes in the voltage and current of the internal components of the equipment, accelerating the aging of the components and shortening the service life of the equipment.

[0003] In addition to electromagnetic interference, vibration can also have adverse effects on the use of power equipment. Substations are mainly composed of various buildings and structures and a large number of high-voltage electrical equipment. Severe vibration can damage the vulnerable parts of power equipment, reduce accuracy, or lose their function due to sliding, falling, etc., affecting the normal operation of the power grid. It is often difficult to repair these equipment, especially some imported electrical equipment without accessories.

[0004] At present, most of the existing power equipment protection devices are aimed at specific power equipment itself. At the same time, they can only protect against smaller vibrations. If they encounter stronger vibrations such as earthquakes, they cannot function well, and they cannot achieve anti-magnetic and vibration isolation functions at the same time, so their functions are relatively limited. Summary of the invention

[0005] In order to solve the problems existing in the prior art, the present invention provides a foundation protection device for electric power equipment which can control foundation vibration and prevent electromagnetic wave interference at the same time.

[0006] In order to achieve the above-mentioned purpose, the technical solution proposed in the present invention is: a magnetically-proof and vibration-insulated protective device for power equipment foundation, wherein the power equipment foundation and the protective device are both arranged in a foundation pit, and include an air cushion system, a hydraulically-filled shock absorber and a steel ball group; the air cushion system includes a plurality of first air cushion structures evenly arranged along the circumference of the power equipment foundation and at least one second air cushion structure arranged at the bottom of the power equipment foundation; the first air cushion structure and the second air cushion structure both include an air cushion body, top plates arranged at both ends of the air cushion body and a waist ring sleeved on the air cushion body; the shock absorber is arranged inside the air cushion bodies of the first air cushion structure and the second air cushion structure, and the two ends of the shock absorber are respectively fixedly connected to the top plates at both ends of the air cushion body; the steel ball group is arranged inside the air cushion body of the first air cushion structure, and includes a long rope connected to the top plates at both ends of the air cushion body and a plurality of steel balls suspended on the long rope;

[0007] During vibration, the air cushion body and the shock absorber are compressed and rebounded synchronously to offset the vibration, and the steel balls collide with each other to offset the vibration.

[0008] The above technical solution is further designed as follows: one top plate of several first air cushion structures abuts against the edge of the foundation pit, and the other top plates form a regular polygon, the power equipment foundation is located at the center of the regular polygon, and the side surfaces of adjacent first air cushion structures abut against each other; one top plate of the first air cushion structure abuts against the bottom surface of the foundation pit, and the other top plate abuts against the bottom surface of the power equipment foundation.

[0009] The gaps between the power equipment foundation and the air cushion system and the adjacent air cushion structures are filled with rubber fillers.

[0010] The rubber filler is a Co@C microsphere absorbing material with a core-shell structure.

[0011] The first air cushion structure and the second air cushion structure are both connected to an air pressure control system, which includes an air pressure sensor, an air compressor, a high-pressure tank, a controller, and an inflation valve and an deflation valve arranged on the air cushion body. The air compressor, the high-pressure tank and the inflation valve are connected in sequence, the controller is connected to the inflation valve and the deflation valve, and the air pressure sensor is arranged in the air cushion structure and connected to the controller.

[0012] The protection device also includes a dryer connected to the air compressor and a filter connected to the dryer.

[0013] The hydraulic pneumatic shock absorber is a double-tube hydraulic pneumatic shock absorber.

[0014] The steel ball group includes two long ropes arranged in parallel and a connecting component arranged on the two long ropes for connecting the long ropes and the steel balls; the connecting component includes two long rope connecting parts arranged opposite to each other and a steel ball connecting part fixedly arranged between the two long rope connecting parts, the long rope connecting parts are provided with a longitudinal through hole for the long ropes to pass through and a longitudinal connecting hole for connecting the steel ball connecting parts, the steel ball connecting parts are provided with a groove for connecting the steel wire for hanging the steel balls and an insert block for inserting into the longitudinal connecting hole.

[0015] A plurality of connecting components are arranged at fixed intervals along the length direction of the long rope, and the intervals are such that adjacent steel balls do not contact each other when they are stationary.

[0016] Multiple steel balls are at the same height when they are stationary.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] Compared with the prior art which mostly only provides vibration protection for specific power equipment, the present invention can directly protect the foundation of the building where the power equipment is installed, thereby protecting all the power equipment in the building.

[0019] The present invention combines equipment or materials such as an air cushion structure, a steel ball group, a shock absorber and a rubber filler in a scientific manner based on accurate stratum exploration, thereby providing a foundation protection device for power equipment based on accurate stratum exploration that has both anti-magnetic and vibration isolation functions.

[0020] The present invention provides an air cushion structure and a shock absorber. During an earthquake or vibration, the air cushion structure and the shock absorber are compressed to convert the impact force into internal elastic energy. When the earthquake force or vibration disappears, the air cushion structure and the shock absorber release the stored elastic energy, thereby achieving control of the earthquake force and vibration. Compared with the prior art that can only isolate or weaken tiny vibrations, this invention has the advantage of being able to weaken or isolate relatively strong earthquake forces or vibrations in the horizontal and vertical directions.

[0021] The present invention arranges a steel ball group in the air cushion structure. When a tiny vibration occurs that is not enough for the air cushion to work, the steel ball group collides with each other, and the purpose of controlling the tiny vibration of the foundation is achieved by converting the vibration energy into kinetic energy and then into heat energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a front view of the basic protection device;

[0023] Figure 2 A longitudinal section of the basic protection device;

[0024] Figure 3 This is the AA section view of the basic protection device;

[0025] Figure 4 A top view of the basic protection device;

[0026] Figure 5 1 is a front view (left side) and a top view (right side) of the first air cushion structure;

[0027] Figure 6 for Figure 5 Sectional view along BB (left side) and CC (right side);

[0028] Figure 7 The front view (left side) and top view (right side) of the second air cushion structure;

[0029] Figure 8 It is a schematic diagram of the air pressure control system;

[0030] Fig. 9 It is a schematic diagram of a hydraulic gas-filled shock absorber;

[0031] Fig.10 It is a schematic diagram of the steel ball and its connection structure;

[0032] Fig.11It is the front view, side view and DD section view of the structure connected with the long rope;

[0033] Fig.12 The front view and side view of the structure of the connection part with the steel ball;

[0034] Reference numerals:

[0035] 1. Air cushion structure: 11. Stainless steel top plate; 12. Rubber layer and reinforced cloth layer; 13. Waist ring; 2. Air pressure control system; 21. Air pressure sensor; 22. PLC controller; 23. Inflation solenoid valve; 24. Deflation solenoid valve; 25. High-pressure tank; 26. Air compressor; 27. Dryer; 28. Filter; 29. ​​Power supply; 210, 211, 212 pipelines (output line and power line); 213. Gas pipeline; 214. Power line; 21 5. Transmission line; 3. Hydraulic pneumatic shock absorber; 31. Shell; 32. Piston rod; 33. Piston valve; 34. Working chamber; 35. Bottom valve; 36. Liquid storage chamber; 37 Air chamber; 38. Damping fluid; 4. Steel ball group; 41. Long rope; 42. Long rope connecting part component; 43. Steel ball connecting part component; 44. Steel wire; 45. Steel ball; 46. Cylindrical metal block; 47. Longitudinal through hole; 48. Transverse through hole; 49. Groove; 5. Rubber filler. DETAILED DESCRIPTION

[0036] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0037] Embodiment 1

[0038] Since the independent foundation under the column is a commonly used foundation type for substations, this embodiment takes the independent foundation under the column as an example for design introduction, but in actual application, it can also be used as a protective device for the foundation of other types of power equipment.

[0039] like Figures 1 to 4 As shown, the anti-magnetic vibration isolation power equipment foundation protection device of this embodiment is arranged in a hexagonal foundation pit, including an air cushion system, a hydraulically inflated shock absorber 3, a steel ball group 4 and a rubber filler 5 with a Co@C microsphere absorbing material with a core-shell structure.

[0040] The air cushion structure 1 includes a plurality of first air cushion structures evenly arranged along the circumference of the independent foundation under the column and at least one second air cushion structure arranged at the bottom of the independent foundation under the column; the shock absorber is arranged inside the air cushion body of the first air cushion structure and the second air cushion structure, and the two ends of the shock absorber are respectively fixedly connected to the top plates 11 at the two ends of the air cushion body; the steel ball group 4 is arranged inside the air cushion body of the first air cushion structure, including a long rope connected to the top plates 11 at the two ends of the air cushion body and a plurality of steel balls suspended on the long rope.

[0041] When there is a horizontal earthquake force or vibration, the impact force is transmitted to the first air cushion structure. The air cushion is subjected to external pressure and begins to be compressed, and the impact force is converted into internal elastic energy. As the air cushion is compressed, a corresponding amount of energy is stored inside the air cushion, and a certain pressure is formed inside the air cushion to resist external impact and vibration. When the horizontal earthquake force or vibration disappears, the air cushion structure begins to rebound and release the stored elastic energy. At this time, the hydraulic gas-filled shock absorber in the air cushion gradually converts the elastic energy into friction heat energy through the cooperation of the internal piston and the damping fluid and releases it. Subsequently, the vibration of the air cushion gradually weakens until it returns to its initial state, thereby achieving control of horizontal earthquake force and vibration. Similarly, the second air cushion structure used for the independent foundation under the supporting column also weakens or isolates the vertical earthquake force or vibration according to this principle.

[0042] Embodiment 2

[0043] The anti-magnetic vibration isolation power equipment foundation protection device of this embodiment is further designed on the basis of the embodiment. Figure 2 and Figure 3 As shown, six first air cushion structures form a regular hexagon with a small regular hexagonal foundation pit in the middle, the independent foundation under the column is set at the center of the hexagon, and the second air cushion structure is used to support the independent foundation under the column of the power equipment room.

[0044] The air cushion structure 1 includes an air cushion body, a stainless steel top plate 11 arranged at both ends of the air cushion body, and two waist rings 13 mounted on the air cushion body. The air cushion body is composed of several layers of rubber layers and reinforced cloth layers 12, and is used as an air spring to resist earthquake force or vibration.

[0045] Combination Figure 3 and Figure 4 As shown, each face of the hexagonal foundation pit is closely connected with a top plate 11 of the corresponding first air cushion structure, and the air cushion body is divided into three sections by two waist rings 13. The width of the air cushion structure 1 gradually increases from the inside to the outside, so that two adjacent first air cushion structures are closely connected with each other. Figure 5 and Figure 6 As shown, the three sections of the second air cushion structure have the same width. Figure 7 shown.

[0046] The connection between the stainless steel top plate 11 and the air cushion body must be sufficiently tight to ensure the sealing of the air cushion. The thickness of the top plate 11, the number of rubber layers and reinforcing cloth layers 12, and the strength of the waist ring 13 must meet the strength requirements of the air cushion 1.

[0047] The air pressure of the air cushion structure 1 needs to be set based on accurate stratum survey and test to find out the air pressure when the vibration-proof performance is best, and the air pressure control system 2 is used to adjust the air pressure in the air cushion 1 to the optimal air pressure.

[0048] Under the action of the stable upper load, the air cushion structure 1 supported under the independent foundation under the column is also in a constant compression state. In this state, the support force it provides is balanced with the upper load. At this time, the air cushion has sufficient rigidity to stably support the upper load. When the air pressure of the air cushion needs to be adjusted, the air cushions under all the independent foundations under the building are adjusted at the same time and raised and lowered synchronously. If an air cushion is damaged, the air pressure in other air cushions can be adjusted synchronously immediately to ensure the stability of the upper structure.

[0049] When the air cushion structure 1 is in use, when the outside world applies horizontal or vertical impact force, or horizontal or vertical vibration, the impact force is transmitted to the air cushion structure 1, and the air cushion structure 1 is subjected to external pressure and begins to be compressed, and the impact force is converted into internal elastic energy. As the air cushion is compressed, a corresponding amount of energy is stored in the air cushion, and a certain pressure is formed inside the air cushion to resist external impact and vibration. In this device, the six first air cushion structures are mainly used to resist horizontal seismic forces or vibrations in various directions, while the second air cushion structure used to support the foundation is mainly used to resist vertical seismic forces or vibrations.

[0050] During installation, it is necessary to conduct tests based on precise surveys of the strata to determine the air pressure for optimal anti-vibration performance, and use an air pressure control system to adjust the air pressure in the air cushion structure 1 to the optimal pressure. The thickness of the stainless steel top plate 11, the air cushion body, and the strength of the waist ring 13 must meet the strength requirements of the air cushion. The connection between the top plate 11 and the air cushion body must be sufficiently tight to ensure the sealing of the air cushion. The two waist rings 13 must also have sufficient strength, and galvanized anti-expansion steel can be used. Its function is to control the expansion width of the rubber layer and the reinforcing cloth layer during inflation, thereby extending the service life. At the same time, when uneven settlement occurs in the foundation of the power equipment room, the difference can also be compensated by adjusting the height of the second air cushion structure of the independent foundation under the column that supports the power equipment room.

[0051] In addition to being used to resist vertical earthquake forces or vibrations, the air cushion structure 1 used to support the foundation can also be used to mitigate the adverse effects of uneven foundation settlement on the use of power equipment. When uneven settlement occurs in the foundation of the power equipment room, the height of the air cushion 1 used to support the foundation at the corresponding position can be adjusted through the air pressure control system 2 to compensate for the settlement difference without affecting the anti-vibration performance, thereby achieving the purpose of alleviating the adverse effects of uneven foundation settlement on the use of power equipment.

[0052] The rubber filler 5 of the Co@C microsphere absorbing material with a core-shell structure is mainly filled in a small regular hexagonal foundation pit surrounded by the six first air cushion structures and in the gaps between the six first air cushion structures. It is used to absorb electromagnetic waves around the power equipment room and prevent the power equipment from being affected by electromagnetic interference signals during operation.

[0053] The top plate 11 at one end of the first air cushion structure is closely connected to the corresponding surface of the regular hexagonal foundation pit, and the top plate 11 at the other side is closely connected to the rubber filler 5 with the Co@C microsphere absorbing material with core-shell structure added.

[0054] When the cohesiveness and strength of the rubber filler 5 do not meet the requirements, it can be mixed with the in-situ soil in a certain ratio. The core-shell structured Co@C microsphere absorbing material has excellent absorbing performance. Compared with electromagnetic shielding materials, it has the advantages of preventing electromagnetic interference and not causing electromagnetic wave reflection and thus generating secondary electromagnetic pollution.

[0055] Combination Figure 8 As shown, each air cushion structure 1 is connected to an air pressure control system 2, which includes an air pressure sensor 21, a PLC controller 22, an inflation solenoid valve 23, a deflation solenoid valve 24, a high-pressure tank 25, an air compressor 26, a dryer 27, a filter 28 and a power supply 29.

[0056] The air pressure sensor 21 is arranged in the air cushion structure 1, and is connected to the PLC controller 22 through a line 210, which includes an output line and a power line. The PLC controller 22 has a power supply, and no external power supply is required. The PLC controller 22 is also connected to the inflation solenoid valve 23 and the deflation solenoid valve 24 through lines 211 and 212, which include a control line and a power line. The inflation solenoid valve 23 and the deflation solenoid valve 24 are arranged on the air cushion body.

[0057] The charging solenoid valve 23, the high-pressure tank 25, the air compressor 26, the dryer 27 and the filter 28 are connected in sequence through the gas pipeline 213, wherein the air compressor 26, the dryer 27 and the filter 28 are connected to the power source 29 through the power line 214. The air compressor 26 has a motor inside, and generally no external motor is required.

[0058] When in use, the air pressure sensor 21 in the air cushion structure 1 converts the detected pressure signal into an electrical signal and transmits it to the PLC controller 22. The PLC controller 22 controls the opening and closing of the inflation solenoid valve 23 and the deflation solenoid valve 24 by writing a program, thereby adjusting the air pressure in the air cushion structure 1 to a desired range.

[0059] When the inflation solenoid valve 23 is opened, the high-pressure tank 25 injects air into the air cushion 1 to increase the air pressure; if the air pressure is too high, the PLC controller 22 controls the deflation solenoid valve 24 to open, and the air in the air cushion structure 1 flows into the atmosphere through the deflation solenoid valve 24, thereby reducing the air pressure.

[0060] The high-pressure tank 25 is equipped with an air pressure sensor to monitor the air pressure of the high-pressure tank 25. If the air pressure of the high-pressure tank 25 is less than a certain threshold, the air compressor 26 enters the working mode to replenish the high-pressure tank 25 with air. The air entering the air compressor 26 from the outside needs to pass through the filter 28 and the dryer 27 to keep the air in the entire charging and discharging system dry and clean. The opening and closing of the filter 28 and the dryer 27 are uniformly controlled by the opening and closing of the air compressor 26 through the transmission line 215.

[0061] Combination Fig. 9 As shown, the hydraulic pneumatic shock absorber 3 can select a double-tube hydraulic pneumatic shock absorber, which is arranged inside the air cushion structure 1, including a shell 31, a piston rod 32, a piston valve 33, a working chamber 34, a bottom valve 35, a liquid storage chamber 36, an air chamber 37 and a damping fluid 38, which is arranged at the internal center position of each group of air cushions 1 for vibration control.

[0062] A working chamber 34 is provided in the shell 31. The cavity between the working chamber 34 and the shell 31 is divided into an upper air chamber 37 and a lower liquid storage chamber 36. The bottom of the working chamber 34 is connected to the liquid storage chamber 36 through a bottom valve 35. A piston valve 33 is provided at the end of the piston rod 32 located in the working chamber 34. The damping fluid 38 is distributed in the working chamber 34 and the liquid storage chamber 36. The air chamber 37 is filled with inert gas. The movable end and the fixed end of the hydraulically inflated shock absorber 3 are respectively fixed to the two top plates 11 in the air cushion structure 1, which can be welded.

[0063] In the compression stage, the piston rod 32 presses the damping fluid 38 into the liquid storage chamber 36, and the bottom valve 35 applies a certain resistance to the damping fluid 38 to reduce its flow rate. In the rebound stage, the piston valve 33 can apply a certain resistance to the damping fluid 38 flowing downward. When the damping fluid 38 flows, the elastic energy is converted into heat energy through the friction between the damping fluids 38 and the friction between the damping fluids 38 and the piston valve 33 and the bottom valve 35.

[0064] When external impact or vibration is applied, the piston rod 32 in the hydraulic pneumatic shock absorber 3 also moves in the same direction as the compression of the air cushion 1. When the impact or vibration disappears, the air cushion structure 1 begins to rebound and releases the stored elastic energy. The piston rod 32 in the hydraulic pneumatic shock absorber 3 also moves in the same direction as the rebound of the air cushion structure 1. Relative movement occurs between the piston rod 32 and the damping fluid 38. At this time, the hydraulic pneumatic shock absorber 3 in the air cushion structure 1 can release energy by converting the elastic energy into frictional heat energy. Subsequently, the vibration of the air cushion gradually weakens and returns to its initial state, thereby achieving control of impact and vibration.

[0065] Combination Fig.10 , 11As shown in FIG. 12 , the steel ball group 4 is only arranged in the first air cushion structure, and each steel ball group 4 includes two parallel long ropes 41, a plurality of connecting structures fixed on the long ropes 41 and the same number of steel balls 45 as the connecting structures, which are used to control the basic vibration by converting energy into heat energy through mutual collision when vibration occurs.

[0066] Both ends of the long rope 41 are respectively fixed on the stainless steel top plate 11 of the air cushion structure 1. The long rope 41 needs to have both certain strength and certain elasticity. The required strength needs to be sufficient to support the steel balls 43 on the rope and maintain them at the same height, and the required elasticity needs to be sufficient to enable it to expand and contract synchronously with the air cushion structure 1.

[0067] Several connecting structures are used to connect the long rope 41 and the steel ball 45, and the connecting structures include a long rope connector 42, a steel ball connector 43, a steel wire 44 and a cylindrical metal block. The long rope connector 42 includes two oppositely arranged ones, which are respectively used to connect the two long ropes 41. A longitudinal through hole 47 is reserved in the long rope connector 42 for the long rope to pass through. After the long rope 41 passes through, a knot needs to be tied at both ends of the through hole 47 to fix the position. A transverse through hole 48 is also reserved in the center of the long rope connector 42, which is used to connect with the steel ball connector 43. Small cylinders for inserting into the transverse through hole 48 are provided on both sides of the steel ball connector 43. After the small cylinder passes through the transverse through hole 48, a cylindrical metal block 46 is welded to the end of the small cylinder to prevent the steel ball connector 43 and the long rope connector 42 from being separated during use.

[0068] The steel ball connector 43 and the steel ball 45 are connected by a steel wire 44. One end of the steel wire 44 is thick. After passing through the through hole in the middle of the steel ball 45, the connection part between the steel wire 44 and the steel ball 45 is welded and reinforced. A circle of groove structure 49 is provided in the middle of the side of the middle part of the steel ball connector 43 for the other end of the steel wire 44 connected to the steel ball 45 to be placed. The other end of the steel wire 44 is fixed by winding around the groove structure 49 for one circle and then around itself for several circles. Then, the connection part between the groove structure 49 and the steel wire 44 is welded and reinforced. The spacing of the steel balls 45 can be determined according to the actual situation. It is necessary to ensure that the two adjacent steel balls 45 do not touch each other when stationary. When vibrating, the steel balls 45 collide with each other, and the basic vibration is controlled by converting energy into heat energy.

[0069] When a small vibration occurs that is not enough for the air cushion structure 1 to work, the steel ball group 4 in the air cushion structure 1 will work. When a small vibration occurs, the steel balls 45 collide strongly with each other, and the purpose of controlling the small vibration of the foundation is achieved by converting the energy of the vibration into kinetic energy and then into heat energy.

[0070] The technical solutions of the present invention are not limited to the above-mentioned embodiments, and any technical solutions obtained by equivalent replacement methods fall within the scope of protection required by the present invention.

Claims

1. A magnetic and vibration-proof power equipment foundation protection device, characterized in that: The power equipment foundation and protective devices are arranged in the foundation pit, including an air cushion system, a hydraulically inflated shock absorber and a steel ball group; The air cushion system includes a plurality of first air cushion structures uniformly arranged along the circumference of the power equipment foundation and at least one second air cushion structure arranged at the bottom of the power equipment foundation; The first air cushion structure and the second air cushion structure each include an air cushion body, top plates arranged at both ends of the air cushion body, and a waist ring sleeved on the air cushion body; The shock absorber is arranged inside the air cushion body of the first air cushion structure and the second air cushion structure, and the two ends of the shock absorber are fixedly connected to the top plates at the two ends of the air cushion body respectively; The steel ball group is arranged inside the air cushion body of the first air cushion structure, and includes a long rope connected to the top plates at both ends of the air cushion body and a plurality of steel balls hung on the long rope; During vibration, the air cushion body and the shock absorber are compressed and rebounded synchronously to offset the vibration, and the steel balls collide with each other to offset the vibration.

2. The magnetic-proof and vibration-proof power equipment foundation protection device according to claim 1 is characterized in that: One top plate of several first air cushion structures abuts against the edge of the foundation pit, and the other top plates form a regular polygon. The power equipment foundation is located at the center of the regular polygon, and the side surfaces of adjacent first air cushion structures abut against each other; one top plate of the first air cushion structure abuts against the bottom surface of the foundation pit, and the other top plate abuts against the bottom surface of the power equipment foundation.

3. The magnetic-proof and vibration-proof power equipment foundation protection device according to claim 2 is characterized in that: The gaps between the power equipment foundation and the air cushion system and the adjacent air cushion structures are filled with rubber fillers.

4. The magnetic-proof and vibration-proof power equipment foundation protection device according to claim 3 is characterized in that: The rubber filler is a Co@C microsphere absorbing material with a core-shell structure.

5. The magnetic-proof and vibration-proof power equipment foundation protection device according to claim 1 is characterized in that: The first air cushion structure and the second air cushion structure are both connected to an air pressure control system, which includes an air pressure sensor, an air compressor, a high-pressure tank, a controller, and an inflation valve and an deflation valve arranged on the air cushion body. The air compressor, the high-pressure tank and the inflation valve are connected in sequence, the controller is connected to the inflation valve and the deflation valve, and the air pressure sensor is arranged in the air cushion structure and connected to the controller.

6. The magnetic-proof and vibration-proof power equipment foundation protection device according to claim 5 is characterized in that: The utility model also comprises a dryer connected with the air compressor and a filter connected with the dryer.

7. The magnetic and vibration-proof power equipment foundation protection device according to claim 1 is characterized by: The hydraulic pneumatic shock absorber is a double-tube hydraulic pneumatic shock absorber.

8. The magnetic-proof and vibration-insulated power equipment foundation protection device according to claim 1 is characterized in that: The steel ball group includes two long ropes arranged in parallel and a connecting component arranged on the two long ropes for connecting the long ropes and the steel balls; the connecting component includes two long rope connecting parts arranged opposite to each other and a steel ball connecting part fixedly arranged between the two long rope connecting parts, the long rope connecting parts are provided with a longitudinal through hole for the long ropes to pass through and a longitudinal connecting hole for connecting the steel ball connecting parts, the steel ball connecting parts are provided with a groove for connecting the steel wire for hanging the steel balls and an insert block for inserting into the longitudinal connecting hole.

9. The magnetic-proof and vibration-insulated power equipment foundation protection device according to claim 8 is characterized in that: A plurality of connecting components are arranged at fixed intervals along the length direction of the long rope, and the intervals are such that adjacent steel balls do not contact each other when they are stationary.

10. The magnetic-proof and vibration-insulated power equipment foundation protection device according to claim 9 is characterized in that: Multiple steel balls are at the same height when they are stationary.

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