A seismic steel spring vibration isolation device

Abstract

The present invention discloses an earthquake-resistant steel spring vibration isolation device, which consists of an upper support, a lower support, an external limit assembly, a damper, a main spring, a shear column, an upper elastic gasket, a lower elastic gasket, a preload screw, a preload nut, a lock nut and a limit nut. The vibration isolation device can realize the function of isolating vibration. At the same time, under the action of an earthquake, the vibration isolation device has an earthquake-resistant function, thereby protecting the safety of the upper structure under the action of an earthquake.

Description

Technical Field

[0001] The present invention relates to the technical field of vibration control, in particular to a seismic-resistant steel spring vibration isolation device. Background Art

[0002] As the primary rail transit system for urban transportation, the land along its routes is precious and valuable. The vibrations caused by daily subway operations also cause significant problems for buildings along the route. The most effective solution is to install vibration isolation supports between the structure and the foundation. However, since current steel spring vibration isolation supports only provide vibration isolation, ensuring that the supports themselves have sufficient stiffness and strength to withstand earthquakes while maintaining their vibration isolation function remains a major challenge in the field of vibration control. Summary of the Invention

[0003] This patent proposes an earthquake-resistant steel spring vibration isolation device, which can isolate vibrations. At the same time, under the action of an earthquake, the vibration isolation device has an earthquake-resistant function to protect the safety of the upper structure under the action of an earthquake.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] An anti-seismic steel spring vibration isolation device, the device consists of an upper support, a lower support, an external limit assembly, a damper, a main spring, a shear column, an upper elastic washer, a lower elastic washer, a preload screw, a preload nut, a lock nut and a limit nut;

[0006] There are four outer limit assemblies, which are connected at the four corners of the upper support and the lower support;

[0007] A damper is provided between the upper support and the lower support;

[0008] A lower elastic gasket is provided at the lower support, and an upper elastic gasket is provided at the upper support.

[0009] Further; the upper support is composed of an upper connecting plate, an upper web, an upper rib, an upper pressure plate, an upper cylinder and an upper circular pad;

[0010] The upper connecting plate and the upper pressing plate are arranged in parallel, the upper portion of the upper web is fixedly connected to the upper connecting plate, and the lower portion of the upper web is fixedly connected to the upper pressing plate;

[0011] The upper rib is arranged between the upper webs, the upper portion of the upper rib is fixedly connected to the upper connecting plate, and the lower portion of the upper rib is fixedly connected to the upper pressing plate;

[0012] The upper cylinder is arranged at the lower part of the upper pressing plate, and an elastic cylinder is sleeved on the outer circle of the upper cylinder;

[0013] A round through hole a is opened in the middle of the upper pressing plate, and an upper round pad is embedded in the round through hole a.

[0014] Further; the lower support is composed of a lower connecting plate, a lower web, a lower rib plate, a lower pressure plate and a lower cylinder;

[0015] The lower connecting plate and the lower pressing plate are arranged in parallel, the upper part of the lower web is fixedly connected to the lower pressing plate, and the lower part of the lower web is fixedly connected to the lower connecting plate;

[0016] The lower rib plate is arranged between the lower belly plates, the upper portion of the lower rib plate is fixedly connected to the lower pressing plate, and the lower portion of the lower rib plate is fixedly connected to the lower connecting plate;

[0017] The lower connecting plate is provided with a countersunk hole b, and the countersunk portion of the countersunk hole b is located on the lower plane of the lower connecting plate;

[0018] The lower cylinder is arranged on the upper part of the lower pressing plate, and an elastic cylinder is sleeved on the outer circle of the lower cylinder.

[0019] Further; the middle portion of the lower pressing plate is provided with a countersunk hole a, the countersunk portion of the countersunk hole a is located on the lower plane of the lower pressing plate;

[0020] The upper cylinder of the upper support and the lower cylinder of the lower support are arranged correspondingly in the vertical direction, and the round through hole a of the upper support and the countersunk hole a of the lower support are arranged correspondingly in the vertical direction;

[0021] The shear column is composed of two sections of cylinders with different diameters. A threaded hole a is opened at one end of the shear column with a larger diameter, and a thread a is processed at the other end of the shear column with a larger diameter. The limit nut is screwed on the thread a of the shear column. The shear column passes through the countersunk hole a on the bottom surface of the lower pressure plate and the circular through hole a of the upper support. The cylindrical end of the shear column with a larger diameter is embedded in the countersunk hole a. The threaded hole a of the shear column and the countersunk hole b of the lower connecting plate are fixedly connected by bolts.

[0022] Further; the lower pressing plate is processed with a circular array of threaded holes c, and a countersunk hole b on the lower connecting plate;

[0023] The shear column is composed of two sections of cylinders with different diameters. A circular through hole d corresponding to the threaded hole c of the lower pressure plate is processed at the end with the larger diameter of the shear column. The shear column passes through the countersunk hole a on the bottom surface of the lower pressure plate and the circular through hole a of the upper support. At this time, the cylindrical end with the larger diameter of the shear column is embedded in the countersunk hole a, and the shear column and the lower pressure plate are fixedly connected by bolts through the circular through hole d and the threaded hole c.

[0024] Further; the outer side of the shear column is covered with a main spring;

[0025] A main spring is sleeved on the upper cylinder of the upper support and the lower cylinder of the lower support, one end of the main spring is installed on the lower part of the upper pressure plate, and the other end of the main spring is installed on the upper part of the lower pressure plate.

[0026] Further; the upper cylinder at the four corners of the upper pressure plate is processed with four circular through holes b, and the lower cylinder at the four corners of the lower pressure plate is processed with four circular through holes c. The circular through holes b and the circular through holes c are arranged corresponding to each other, and the preloading screw passes through the circular through hole b of the upper pressure plate, the upper cylinder, the main spring, the lower cylinder and the circular through hole c of the lower pressure plate from top to bottom;

[0027] The pre-stressing screw, the pre-stressing nut and the anti-loosening nut connect and lock the upper support and the lower support, and the anti-loosening nut is installed on the outer side of the pre-stressing nut.

[0028] Further; the outer limit assembly consists of an upper limit member, a lower limit member, two H-shaped members and two elastic pads;

[0029] The upper limit piece is concave in shape, and the upper part of the upper limit piece is connected to the side of the upper pressure plate by bolts. The lower limit piece is convex in shape, and the lower part of the lower limit piece is connected to the side of the lower pressure plate by bolts. The convex edge of the lower limit piece is embedded in the concave edge of the upper limit piece. An H-shaped piece is also placed between the two sides of the convex edge of the lower limit piece and the two sides of the concave edge of the upper limit piece. The inner sides of the two ends of the H-shaped piece are respectively stuck in the upper limit piece and the lower limit piece, and elastic pads are provided on the three inner surfaces of the H-shaped piece.

[0030] Further; the damper is composed of an upper connecting beam, a cavity, a bolt insert, a threaded steel ball and a damping fluid;

[0031] The upper connecting beam is processed with a row of threaded holes b, and the threaded holes b on the upper plane of the upper connecting beam are provided with countersunk heads. Bolt inserts are screwed onto the threaded holes b from the upper plane of the upper connecting beam, and the heads of the bolt inserts are embedded in the countersunk heads of the threaded holes b.

[0032] The other end of the bolt insert is screwed with a threaded steel ball;

[0033] The upper plane of the upper connecting beam is installed on the lower plane of the upper pressing plate of the upper support, and the upper connecting beam and the upper pressing plate are fixedly connected by bolts;

[0034] The bottom of the cavity is installed on the upper plane of the lower pressure plate of the lower support. The cavity and the lower pressure plate are fixedly connected by bolts. The inner cavity of the cavity is filled with damping fluid. The bolt insert is inserted into the cavity and contacts the damping fluid.

[0035] Compared with the prior art, the present invention has at least one of the following beneficial effects:

[0036] 1. Support function: The vibration isolation device provides sufficient vertical rigidity to support the superstructure.

[0037] 2. Vibration isolation effect: The upper support connected to the upper structure and the lower support connected to the lower structure achieve vertical and horizontal elastic isolation through the main spring. The main spring adjusts the frequency of the upper structure and isolates vibration. The vibration isolation device isolates environmental vibration through its own vertical and horizontal micro-reciprocating deformation.

[0038] 3 Damping effect: The damper of the vibration isolation device is a strip-type damper, which provides three-way damping for the system through the three-way reciprocating micro-motion of the upper support 1 and the lower support 2, and accelerates the vibration attenuation of the system.

[0039] (4) Resistance to earthquake effects:

[0040] A. The upper and lower limiters of the external limit assembly are isolated by elastic pads, so they do not operate in the vibration isolation state. However, during earthquakes, vertical movement between the upper and lower limiters is permitted, while horizontal movement is limited. Four sets of external limit assemblies are symmetrically arranged in pairs on each side of the vibration isolation device, providing horizontal limiting action to resist earthquake effects. Furthermore, the elastic pads prevent vertical movement of the device from becoming stuck.

[0041] B. There is a gap of approximately 1 to 2 mm between the shear column and the upper circular pad. In the vibration isolation state, the shear column is inactive. When subjected to an earthquake, the relative displacement between the upper and lower supports exceeds the gap between the shear column and the upper circular pad. The shear column then activates, limiting the relative displacement between the upper and lower supports with its own stiffness, thus providing earthquake resistance.

[0042] C. Under the action of an earthquake, when the vertical relative displacement between the upper and lower supports of the device reaches the limit, the shear column is in direct contact with the upper support, which can transfer the vertical load to play a compressive and tensile role. The device can achieve the purpose of the steel support.

[0043] D. During daily operation of the vibration isolation device, the preload nut and the anti-loosening nut are loosened by a preset distance and simultaneously play an anti-pullout role under the action of an earthquake. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 It is a structural schematic diagram of the present invention.

[0045] Figure 2 This is a cross-sectional view of the first structure of the present invention.

[0046] Figure 3 This is a cross-sectional view of the second structure of the present invention.

[0047] Figure 4 It is a structural schematic diagram of the upper support in the present invention.

[0048] Figure 5 It is a structural schematic diagram of the lower support in the present invention.

[0049] Figure 6 It is a structural schematic diagram of the external limit assembly of the present invention.

[0050] Figure 7It is a side view of the upper limit member in the present invention.

[0051] Figure 8 It is a structural schematic diagram of the H-shaped member in the present invention.

[0052] Figure 9 Schematic diagram of the connection of the H-shaped member in the present invention.

[0053] Figure 10 Schematic diagram of the structure of the damper in the present invention.

[0054] Figure 11 It is a side view of the damper of the present invention.

[0055] Figure 12 This is a cross-sectional view of the third structure of the present invention.

[0056] Description of the drawings: 1-upper support, 101-upper connecting plate, 102-upper web, 103-upper rib, 104-upper pressure plate, 105-upper cylinder, 106-upper circular pad, 2-lower support, 201-lower connecting plate, 202-lower web, 203-lower rib, 204-lower pressure plate, 205-lower cylinder, 3-external limit assembly, 301-upper limit member, 302-lower limit member, 303-H-shaped member, 304-low friction elastic pad, 4-damper, 401-upper connecting beam, 402-cavity, 403-bolt insert, 404-threaded steel ball, 5-main spring, 6-shear column, 7-upper elastic gasket, 8-lower elastic gasket, 9-preload screw, 10-preload nut, 11-locking nut, 12-limit nut. DETAILED DESCRIPTION

[0057] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0058] Example 1:

[0059] An earthquake-resistant steel spring vibration isolation device comprises an upper support 1, a lower support 2, an external limit assembly 3, a damper 4, a main spring 5, a shear column 6, an upper elastic washer 7, a lower elastic washer 8, a preload screw 9, a preload nut 10, a lock nut 11, and a limit nut 12; the vibration isolation device is arranged between a protected structure and a non-protected structure;

[0060] Multiple main springs 5 ​​are installed between the upper support 1 and the lower support 2. These main springs 5 ​​are placed on the lower support 2, and the upper support 1 is placed on top of these main springs 5. The main springs 5 ​​are metal compression springs. One end of some main springs 5 ​​is sheathed around the upper cylinder 105 of the upper support 1 and vertically mounted on the lower surface of the upper pressure plate 104. The other end of the main springs 5 ​​is sheathed around the lower cylinder 205 of the lower support 2 and vertically mounted on the upper surface of the lower pressure plate 204. Another portion of the main springs 5 ​​are sheathed around the outer surface of the shear column 6, forming the basic framework of the vibration isolation device. A damper 4 is positioned between the upper support 1 and the lower support 2. When the upper support 1 and the lower support 2 undergo relative vertical displacement, the damper 4 rapidly attenuates vibration by dissipating energy.

[0061] The shear column 6 is fixedly connected to the lower support 2 and inserted into the upper support 1. When the vibration isolation device is in the vibration isolating working state, the shear column 6 does not work and has a certain gap with the upper support 1; under the action of an earthquake, the shear column 6 enters the working state, providing additional horizontal stiffness to protect the seismic safety of the upper structure. At the same time, the shear column of the device can transmit vertical compression and play a tensile role through the limit nut 12 when the vertical displacement reaches the set limit, so as to protect the safety of the upper structure; the prestressing screw 9, the prestressing nut 10 and the anti-loosening nut 11 connect and lock the upper support 1 and the lower support 2. During daily operation of the vibration isolation device, the prestressing nut 10 and the anti-loosening nut 11 are loosened by a preset distance; the upper elastic gasket 7 is arranged on the upper support 1, and the lower elastic gasket 8 is arranged under the lower support 2; the external limit assembly 3 is arranged on the four sides of the vibration isolation device, and the external limit assembly 3 uses a steel plate to provide a larger in-plane stiffness to achieve the limiting purpose. When the device is in the vibration isolation working state, the outer limit assembly 3 does not work; under the action of an earthquake, the outer limit assembly 3 works. The operation of the outer limit assembly 3 can be selected according to the need to resist horizontal forces.

[0062] The damper 4 consists of an upper connecting beam 401, a cavity 402, a bolt insert 403, a threaded steel ball 404 and a damping fluid. The upper connecting beam 401 is processed with a row of threaded holes b, and a countersunk head is opened at the threaded hole b on the upper plane of the upper connecting beam 401. The bolt insert 403 is screwed onto the threaded hole b from the upper plane of the upper connecting beam 401, and the head of the bolt insert 403 is embedded in the countersunk head of the threaded hole b; the other end of the bolt insert 403 is screwed with a threaded steel ball 404; the upper plane of the upper connecting beam 401 is installed on the lower plane of the upper pressure plate 104 of the upper support 1, and is fixedly connected to the upper pressure plate 104 by bolts; the bottom of the cavity 402 is installed on the upper plane of the lower pressure plate 204 of the lower support 2, and is fixedly connected to the lower pressure plate 204 by bolts. The inner cavity of the cavity 402 is filled with damping fluid. The bolt insert 403 is inserted into the cavity 5.2 402 and is in contact only with the damping fluid, and has no contact with the inner cavity of the cavity 402 .

[0063] The outer limit assembly 301 is composed of an upper limit member 301, a lower limit member 302, two H-shaped members 303 and two elastic pads 304. The upper limit member 301 is concave in shape, and its upper part is connected to the side of the upper pressure plate 104 by bolts. The lower limit member 302 is convex in shape, and its lower part is connected to the side of the lower pressure plate 204 by bolts. The convex edge of the lower limit member 302 can be embedded in the concave edge of the upper limit member 301. At the same time, an H-shaped member 303 is provided between the two sides of the convex edge of the lower limit member 302 and the two sides of the concave edge of the upper limit member 301. The inner sides of the two ends of the H-shaped member 303 are respectively stuck in the upper limit member 301 and the lower limit member 302. At the same time, elastic pads 304 are also provided on the three surfaces inside the H-shaped member 303. The elastic pads 304 isolate the H-shaped member 303 from the upper limit member 301 and the H-shaped member 303 from the lower limit member 302, thereby achieving low-friction sliding.

[0064] The shear column 6 can be fixedly connected to the lower support 2 by welding, bolting, or other effective connection methods. Similarly, the shear column 6 can also be fixedly connected to the upper support 1. The shear column 6 is covered with rubber in the area where it passes through the hole in the upper support 1, and a vibration gap is reserved to isolate the transmission of vibration and noise.

[0065] The lower support 2 is connected to the lower structure, and the upper support 1 is connected to the upper structure; the upper structure is an isolated object, and the lower structure is a non-isolated object; a lower elastic gasket 8 is also provided between the lower support 2 and the lower structure, and an upper elastic gasket 7 is also provided between the upper support 1 and the upper structure.

[0066] The upper support 1 is composed of an upper connecting plate 101, an upper web 102, an upper rib 103, an upper pressure plate 104, an upper cylinder 105, and an upper circular pad 106. The upper connecting plate 101 and the upper pressure plate 104 are arranged parallel to each other. The upper portion of the upper web 102 is vertically fixedly connected to the upper connecting plate 101, and the lower portion of the upper web 102 is vertically fixedly connected to the upper pressure plate 104. The multiple upper webs 102 are arranged parallel to each other. Multiple upper ribs 103 are arranged between the upper webs 102 and are fixedly connected to the upper webs 102 at right angles. The upper portion of the upper rib 103 is vertically fixedly connected to the upper connecting plate 101, and the lower portion of the upper rib 103 is vertically fixedly connected to the upper pressure plate 104.

[0067] Multiple upper cylinders 105 are arranged in two rows on either side of the lower surface of the upper platen 104. Elastic cylinders are sleeved around the outer circumferences of the upper cylinders 105. A row of circular through-holes a are machined into the center of the upper platen 104, with upper circular pads 106 embedded in the through-holes a. The through-holes a and the upper cylinders 105 are arranged parallel to each other, forming a square array.

[0068] The upper pressure plate 104 has four circular through holes b machined at the center of the upper cylinder 105 at its four corners. Similarly, the lower pressure plate 204 also has four circular through holes c machined at the center of the lower cylinder 205 at its four corners. The circular through holes b correspond to the circular through holes c. Four prestressing screws 9 pass from top to bottom through the circular through holes b of the upper pressure plate 104, the upper cylinder 105, the main spring 5, the lower cylinder 205, and the circular through holes c of the lower pressure plate 204. A prestressing nut 10 is used between the upper plane of the upper pressure plate 104 and the lower plane of the lower pressure plate 204 to lock the upper support 1 and the lower support 2 by screwing at both ends of the prestressing screw 9, and then a lock nut 11 is installed on the outside of the prestressing nut 10. During daily operation of the vibration isolation device, the prestressing nut 10 and the lock nut 11 are loosened by a preset distance and play an anti-pullout role under the action of an earthquake.

[0069] The lower support 2 is composed of a lower connecting plate 201, a lower web 202, a lower rib 203, a lower pressure plate 204, and a lower cylinder 205. The lower connecting plate 201 and the lower pressure plate 204 are arranged parallel to each other. The upper portion of the lower web 202 is vertically fixedly connected to the lower pressure plate 204, and the lower portion of the lower web 202 is vertically fixedly connected to the lower connecting plate 201. The multiple lower webs 202 are arranged parallel to each other. Multiple lower ribs 203 are arranged between the lower webs 202 and are fixedly connected to the lower webs 202 at right angles. The upper portion of the lower rib 203 is vertically fixedly connected to the lower pressure plate 204, and the lower portion of the lower rib 203 is vertically fixedly connected to the lower connecting plate 201.

[0070] Example 2:

[0071] The lower connecting plate 201 is processed with a countersunk hole b, and the countersunk portion of the countersunk hole b is located on the lower plane of the lower connecting plate 201 .

[0072] Multiple lower cylinders 205 are arranged in two rows on either side of the upper surface of the lower pressing plate 204. A resilient cylinder is sleeved over the outer circumference of each lower cylinder 205. A row of countersunk holes a are machined into the center of the lower pressing plate 204. These holes a and the lower cylinders 205 are arranged parallel to each other in a square array, with the countersunk portions of the holes a located on the lower surface of the lower pressing plate 204.

[0073] The upper cylinder 105 of the upper support 1 and the lower cylinder 205 of the lower support 2 correspond to each other in the vertical direction, and the round through hole a of the upper support 1 and the countersunk hole a of the lower support 2 correspond to each other in the vertical direction.

[0074] The shear column 6 is composed of two sections of cylinders with different diameters, one end of which has a larger diameter and a threaded hole a, and the other end has a thread a. Multiple shear columns 6 pass through the countersunk hole a on the bottom surface of the lower pressure plate 204 and at the same time pass through the circular through hole a of the upper support 1. At this time, the cylindrical end of the shear column 6 with a larger diameter is embedded in the countersunk hole a, and the threaded hole a of the shear column 6 is fixed to the countersunk hole b of the lower connecting plate 201 by bolts; there is a gap of about 1 to 2 mm between the shear column 6 and the upper circular pad 106, and after the static weight load of the protected structure is stable, the upper end of the shear column 6 and the lower plane of the upper connecting plate 101 still have a preset gap.

[0075] The limiting nut 12 is screwed onto the thread a of the shear column 6 , and a certain distance is formed between the limiting nut 12 and the upper plane of the upper pressure plate 104 , thereby playing a limiting role.

[0076] Example 3:

[0077] Modifications are made to embodiment 2, where threaded holes c arranged in a circular array are processed on the sinking platform along the countersunk hole a of the lower pressing plate 204. At the same time, the countersunk hole b of the lower connecting plate 201.

[0078] A circular through hole d corresponding to the threaded hole c of the lower pressure plate 204 is processed at the end with a larger diameter of the shear column 6. Multiple shear columns 6 pass through the countersunk hole a on the bottom surface of the lower pressure plate 204 and at the same time pass through the circular through hole a of the upper support 1. At this time, the cylindrical end of the shear column 6 with a larger diameter is embedded in the countersunk hole a, and the shear column 6 and the lower pressure plate 204 are connected with bolts through the circular through hole d and the threaded hole c to form a fixed connection between the two components.

[0079] Although the present invention has been described herein with reference to a number of illustrative embodiments thereof, it will be understood that numerous other modifications and implementations may be devised by those skilled in the art that fall within the scope and spirit of the principles disclosed herein. More specifically, within the scope of the present disclosure, the drawings, and the claims, numerous variations and modifications may be made to the components and / or layout of the subject combination arrangement. In addition to variations and modifications to the components and / or layout, other uses will also be apparent to those skilled in the art.

Claims

1. A seismic steel spring vibration isolation device, characterized by: The device consists of an upper support (1), a lower support (2), an external limit assembly (3), a damper (4), a main spring (5), a shear column (6), an upper elastic washer (7), a lower elastic washer (8), a preload screw (9), a preload nut (10), a lock nut (11) and a limit nut (12); Four external limit assemblies (3) are provided, and the external limit assemblies (3) are connected at four corners of the upper support (1) and the lower support (2); A damper (4) is provided between the upper support (1) and the lower support (2); A lower elastic gasket (8) is provided at the lower support (2), and an upper elastic gasket (7) is provided at the upper support (1); The lower support (2) is composed of a lower connecting plate (201), a lower web (202), a lower rib plate (203), a lower pressure plate (204) and a lower cylinder (205); The lower connecting plate (201) and the lower pressing plate (204) are arranged in parallel, the upper portion of the lower web (202) is fixedly connected to the lower pressing plate (204), and the lower portion of the lower web (202) is fixedly connected to the lower connecting plate (201); The lower rib plate (203) is arranged between the lower belly plate (202), the upper portion of the lower rib plate (203) is fixedly connected to the lower pressing plate (204), and the lower portion of the lower rib plate (203) is fixedly connected to the lower connecting plate (201); The lower connecting plate (201) is provided with a countersunk hole b, and the countersunk portion of the countersunk hole b is located on the lower plane of the lower connecting plate (201); The lower cylinder (205) is arranged on the upper part of the lower pressing plate (204), and an elastic cylinder is sleeved on the outer circle of the lower cylinder (205); A countersunk hole a is opened in the middle of the lower pressing plate (204), and the countersunk part of the countersunk hole a is located on the lower plane of the lower pressing plate (204); The upper cylinder (105) of the upper support (1) and the lower cylinder (205) of the lower support (2) are arranged correspondingly in the vertical direction, and the round through hole a of the upper support (1) and the countersunk hole a of the lower support (2) are arranged correspondingly in the vertical direction; The shear column (6) is composed of two sections of cylinders with different diameters. A threaded hole a is opened at one end of the shear column (6) with a larger diameter, and a thread a is processed at the other end of the shear column (6) with a larger diameter. The limit nut (12) is screwed on the thread a of the shear column (6). The shear column (6) passes through the countersunk hole a on the bottom surface of the lower pressure plate (204) and the circular through hole a of the upper support (1). The cylindrical end of the shear column (6) with a larger diameter is embedded in the countersunk hole a. The threaded hole a of the shear column (6) is fixedly connected to the countersunk hole b of the lower connecting plate (201) by bolts. The outer surface of the shear column (6) is covered with a main spring (5); After the static weight load of the protected structure is stabilized, a preset gap is still formed between the upper end of the shear column (6) and the lower plane of the upper connecting plate (101); A main spring (5) is sleeved on the upper cylinder (105) of the upper support (1) and the lower cylinder (205) of the lower support (2), and one end of the main spring (5) is installed on the lower part of the upper pressure plate (104), and the other end of the main spring (5) is installed on the upper part of the lower pressure plate (204).

2. The seismic-resistant steel spring vibration isolation device according to claim 1, characterized in that: The upper support (1) is composed of an upper connecting plate (101), an upper web (102), an upper rib (103), an upper pressure plate (104), an upper cylinder (105) and an upper circular pad (106); The upper connecting plate (101) and the upper pressing plate (104) are arranged in parallel, the upper portion of the upper web (102) is fixedly connected to the upper connecting plate (101), and the lower portion of the upper web (102) is fixedly connected to the upper pressing plate (104); The upper rib plate (103) is arranged between the upper web plates (102), the upper portion of the upper rib plate (103) is fixedly connected to the upper connecting plate (101), and the lower portion of the upper rib plate (103) is fixedly connected to the upper pressing plate (104); The upper cylinder (105) is arranged at the lower part of the upper pressing plate (104), and an elastic cylinder is sleeved on the outer circle of the upper cylinder (105); A circular through hole a is formed in the middle of the upper pressing plate (104), and an upper circular pad (106) is embedded in the circular through hole a.

3. The seismic-resistant steel spring vibration isolation device according to claim 1, characterized in that: Four circular through holes b are machined at the center of the upper cylinder (105) at the four corners of the upper pressure plate (104), and four circular through holes c are machined at the center of the lower cylinder (205) at the four corners of the lower pressure plate (204). The circular through holes b and the circular through holes c are arranged corresponding to each other, and the supporting preloading screw (9) passes from top to bottom through the circular through holes b of the upper pressure plate (104), the upper cylinder (105), the main spring (5), the lower cylinder (205) and the circular through holes c of the lower pressure plate (204); The preloading screw (9), the preloading nut (10) and the anti-loosening nut (11) connect and lock the upper support (1) and the lower support (2), and the anti-loosening nut (11) is installed on the outer side of the preloading nut (10).

4. The seismic-resistant steel spring vibration isolation device according to claim 1, characterized in that: The outer limit assembly (3) is composed of an upper limit member (301), a lower limit member (302), two H-shaped members (303) and two elastic pads (304); The upper limit member (301) is concave in shape, and the upper part of the upper limit member (301) is connected to the side of the upper pressure plate (104) by bolts. The lower limit member (302) is convex in shape, and the lower part of the lower limit member (302) is connected to the side of the lower pressure plate (204) by bolts. The convex edge of the lower limit member (302) is embedded in the concave edge of the upper limit member (301), and an H-shaped member (303) is further provided between the two sides of the convex edge of the lower limit member (302) and the two sides of the concave edge of the upper limit member (301). The inner sides of the two ends of the H-shaped member (303) are respectively inserted into the upper limit member (301) and the lower limit member (302), and elastic pads (304) are provided on the three inner surfaces of the H-shaped member (303).

5. The seismic-resistant steel spring vibration isolation device according to claim 1, characterized in that: The damper (4) is composed of an upper connecting beam (401), a cavity (402), a bolt insert (403), a threaded steel ball (404) and a damping fluid; The upper connecting beam (401) is processed with a row of threaded holes b, and the threaded holes b on the upper plane of the upper connecting beam (401) are provided with countersunk heads. The bolt inserts (403) are screwed onto the threaded holes b from the upper plane of the upper connecting beam (401), and the heads of the bolt inserts (403) are embedded in the countersunk heads of the threaded holes b. The other end of the bolt insert (403) is screwed with a threaded steel ball (404); The upper plane of the upper connecting beam (401) is mounted on the lower plane of the upper pressing plate (104) of the upper support (1), and the upper connecting beam (401) and the upper pressing plate (104) are fixedly connected by bolts; The bottom of the cavity (402) is mounted on the upper plane of the lower pressure plate (204) of the lower support (2), the cavity (402) and the lower pressure plate (204) are fixedly connected by bolts, the inner cavity of the cavity (402) is filled with damping fluid, and the bolt insert (403) is inserted into the cavity (402) and contacts the damping fluid.

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