An earthquake-resistant wrist at the connection part between the main body and the foundation of a building

Abstract

An earthquake-resistant wrist at the joint between the main body and the foundation of a building belongs to the technical field of construction engineering, and solves the technical problem that the area with concentrated seismic stress is prone to cause damage to the building. The solution is as follows: This device includes an upper earthquake-resistant wrist, a lower earthquake-resistant wrist, and a hinge ball. The upper earthquake-resistant wrist and the lower earthquake-resistant wrist are symmetrically arranged with respect to the hinge ball, and the upper earthquake-resistant wrist and the lower earthquake-resistant wrist swing out of position with respect to the equatorial plane of the hinge ball. The structures of the upper earthquake-resistant wrist and the lower earthquake-resistant wrist are the same, and both the upper earthquake-resistant wrist and the lower earthquake-resistant wrist include a connecting sleeve, a protective ring, a buffer ring, a steel wire rope, a tray fixing plate, and a tray. The present invention divides the building main body and the building foundation into two parts, and designs a component - an earthquake-resistant wrist that can absorb and eliminate seismic impact force between the two parts, changing the rigid structure of the building design into a flexible structure similar to the function of a joint, and changing the rigid earthquake resistance at the joint between the main body and the foundation of the building into flexible earthquake resistance.

Description

Technical Field

[0001] The present invention belongs to the technical field of construction engineering, and specifically relates to an earthquake-resistant wrist at the connection part between the main body and the foundation of a building. Background Art

[0002] Columns or walls are the main structural members that bear the load of a building. A column includes a column base, a column head, and a column body, and bears the static and dynamic weights of the building. It is the key to ensuring the safety of the building, people, and property. The huge impact force generated by an earthquake will cause the building to accelerate, resulting in multi-dimensional up, down, left, and right movement and deformation of the building. When the concentrated stress is greater than the bearing range of the building, the building structure will be damaged, losing its safety mechanical guarantee, and the building will collapse. In the construction of existing buildings, columns are mostly formed by pouring reinforced concrete. During an earthquake, due to the concentrated stress in the column structure of the building, the damage to the building is huge. Summary of the Invention

[0003] The main purpose of the present invention is to overcome the deficiencies in the prior art and solve the technical problem that the earthquake stress concentration area is prone to cause damage to buildings. The present invention provides an earthquake-resistant wrist at the connection part between the main body and the foundation of a building. Under the working state of fully considering the safety of the building structure, the destructive force of the earthquake shock wave is eliminated by eliminating the direct conduction of earthquake stress, thereby improving the earthquake resistance performance of the main body of the building, such as the connection part between the column and the foundation wall, so as to solve the safety hazard of the earthquake to the building and improve and optimize the earthquake resistance performance of the building.

[0004] In order to achieve the above invention purpose, the technical solution adopted by the present invention is as follows:

[0005] An earthquake-resistant wrist at the connection part between the main body and the foundation of a building divides the building main body and the building foundation into two parts, and a component - an earthquake-resistant wrist that can absorb and eliminate the earthquake impact force is designed between the two parts, making the rigid structure of the building design become a flexible structure similar to the function of a joint bone. Specifically as follows: It includes an upper earthquake-resistant wrist, a lower earthquake-resistant wrist, and a hinge ball. The upper earthquake-resistant wrist and the lower earthquake-resistant wrist are symmetrically arranged with respect to the hinge ball, and the upper earthquake-resistant wrist and the lower earthquake-resistant wrist swing out of position with respect to the equatorial plane of the hinge ball. A fastening groove is arranged horizontally at the equatorial position of the hinge ball. Two groups of U-shaped groove groups are arranged on the surface of the hinge ball. The opening directions of the two groups of groove groups are opposite, and the two groups of groove groups are perpendicular to each other. A number of grooves are arranged at equal intervals in each group of groove groups. The grooves in each group of groove groups are parallel to each other, and the plane where the grooves are located is perpendicular to the equatorial plane. The head and tail ends of the grooves intersect with the fastening groove;

[0006] The upper anti-seismic wrist and the lower anti-seismic wrist have the same structure. Both the upper anti-seismic wrist and the lower anti-seismic wrist include a connecting sleeve 1, a protective ring, a buffer ring, a steel wire rope, a tray fixing plate and a tray. The buffer ring includes a buffer ring 1 arranged horizontally and several buffer rings 2 arranged vertically.

[0007] The tray is set in a frustum shape, and the trays are relatively arranged on both sides of the hinge ball and are located at the opening position of the U-shaped groove group. The end face of the tray close to the hinge ball is in spherical fit with the hinge ball. A bearing backing plate is installed at the center of the tray, and a steel wire rope through hole is arranged at the edge of the tray and at the position of the orthographic projection of the groove group.

[0008] The tray fixing plate is arranged at the outer end face position of the tray. Dovetail tenons are arranged on the side wall of the tray fixing plate, fixing holes are arranged at the positions of the tray fixing plate corresponding to the steel wire rope through holes at the edge, and long waist-shaped grooves are arranged between the end faces of adjacent fixing holes.

[0009] The two steel wire ropes respectively penetrate through the steel wire rope through holes, fixing holes and grooves corresponding to each group of groove groups, that is, the tray, the tray fixing plate and the hinge ball are flexibly connected by the steel wire ropes. Each steel wire rope forms a U-shaped flexible connection body in space. The hoop ring clamps the middle part of the flexible connection body in the fastening groove. The two groups of flexible connection bodies are perpendicular to each other in different planes and have opposite opening directions. The head and tail ends of the steel wire ropes are fixedly connected to the tray fixing plate.

[0010] The protective ring covers the outside of the tray, the tray fixing plate and the hinge ball. External threads are arranged at one end of the outer wall of the protective ring. One end of the connecting sleeve is threadedly connected to the main body part or the foundation part of the building, and the other end of the connecting sleeve is threadedly connected to the protective ring. Dovetail grooves are arranged on the inner wall of the protective ring close to the external thread side, and the dovetail grooves cooperate with the dovetail tenons. The tray fixing plate is installed at the end face position of the protective ring. The end face of the protective ring on the side away from the external thread is set in a wave shape, and a limiting groove is arranged on the wave-shaped end face. The wave crest position of the protective ring in the upper anti-seismic wrist corresponds to the wave trough position of the protective ring in the lower anti-seismic wrist, and the wave trough position of the protective ring in the upper anti-seismic wrist corresponds to the wave crest position of the protective ring in the lower anti-seismic wrist. A gap is arranged between the protective rings of the upper and lower anti-seismic wrists. The buffer ring 1 is installed in the limiting groove at the wave crest position, and several buffer rings 2 are respectively installed between the limiting groove at the wave trough position and the buffer ring 1. A dust-proof baffle is arranged at the gap between the upper and lower anti-seismic wrists and outside the buffer ring.

[0011] Further, the diameter of the hinge ball is 15 cm. Each group of groove groups on the hinge ball includes seven grooves arranged parallel to each other. The distance between adjacent grooves is 1.2 cm, the depth of the grooves is 1.5 cm, and the width of the grooves is 1.2 cm.

[0012] Further, the thickness of the bearing backing plate is 3 - 5 cm.

[0013] Furthermore, the material of the tray is rubber, and the material of the bearing backing plate is rubber or steel.

[0014] Furthermore, a plurality of threaded holes are arranged on the side wall of the connecting sleeve along the circumferential direction. The diameter of the threaded holes is 5 mm, and the distance between adjacent threaded holes is 30 mm. The anchoring bolts are penetrated and arranged in the corresponding threaded holes. After the connecting sleeve moves to a predetermined position, it is fixedly connected with the main body part or the foundation part of the building through concrete pouring and the anchoring bolts.

[0015] Furthermore, the main body part or the foundation part of the building includes a hollow pipe and an end plate. The end plate includes a steel plate and a rubber gasket. The rubber gaskets are respectively arranged at both end faces of the steel plate. The steel plate is welded to the end of the inner cavity of the hollow pipe, and concrete is poured into the inner cavity of the hollow pipe.

[0016] Furthermore, the steel wire rope connecting adjacent fixing holes is installed in the long waist-shaped groove.

[0017] Furthermore, the contact surface between the bearing backing plate and the articulated ball is set as a spherical surface fit.

[0018] Furthermore, the bearing backing plate includes at least two layers, and an oil film layer is filled between the end faces of adjacent bearing backing plates. The thickness of the oil film layer is 3 mm to 5 mm.

[0019] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0020] 1. The rigid seismic resistance at the combined part of the main body and the foundation of the building is changed to flexible seismic resistance. By setting the seismic wrist shock absorption structure node at the lower part of the building column wall foundation, the conduction of seismic waves and stress buffering can be achieved. Through the mutual cooperation between the articulated ball and the upper and lower seismic wrists, the main body of the building and the building foundation form two working units. The seismic wrists conduct the load up and down between the two working units under normal circumstances; when an earthquake occurs, the seismic wrists will absorb multi-dimensional stress and eliminate the stress shock wave between them, blocking the rigid direct conduction effect of stress up, down, left and right. The seismic wrists are like the stress conversion function of the human skeletal muscle joints, promoting the upper building structure of the column and the wall to reach a relatively stable state, having the effects of improving the structural stress performance, changing from rigid seismic stress to flexible seismic stress, and playing the role of absorbing and eliminating earthquake stress.

[0021] 2. Safety and economy. Compared with the seismic effect of the rubber pad, the present invention has higher fire resistance, and can effectively reduce building damage and ensure the safety of personnel in the event of geological disasters such as earthquakes. At the same time, compared with the cost of traditional seismic buildings, it is more economical, the material selection is more extensive, and it is convenient to optimize and improve the secondary seismic resistance of existing buildings.

[0022] 3. Improve work efficiency. The construction of the anti-seismic wrist building column wall foundation structure provided by the present invention is simple, convenient for industrial production, can effectively improve work efficiency and reduce personnel construction costs, and has wide application value for improving the anti-seismic performance of existing buildings and related facilities and equipment required for anti-seismic purposes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is an exploded view of the external part connection sleeve, protective ring, buffer ring and dust-proof baffle of the present invention;

[0024] Figure 2 It is Figure 1 The schematic diagram of the part assembly structure of

[0025] Figure 3 It is an exploded view of the internal parts of the present invention, including the tray fixing plate, bearing cushion plate, tray, steel wire rope and hinge ball;

[0026] Figure 4 It is Figure 3 The schematic diagram of the part assembly structure of

[0027] Figure 5 It is the top view structure schematic diagram of the protective ring;

[0028] Figure 6 It is Figure 5 The sectional view structure schematic diagram of the A-A plane in

[0029] Figure 7 It is the bottom view structure schematic diagram of the protective ring;

[0030] Figure 8 It is the sectional view structure schematic diagram of the assembly of the tray fixing plate, bearing cushion plate and tray;

[0031] Figure 9 It is the top view structure schematic diagram of the tray fixing plate;

[0032] Figure 10 It is the top view structure schematic diagram of the assembly of the bearing cushion plate and the tray;

[0033] Figure 11 It is the bottom view structure schematic diagram of the hinge ball;

[0034] Figure 12 It is Figure 11 The sectional view structure schematic diagram of the B-B plane in

[0035] In the figure, 1 is a connecting sleeve, 2 is a protective ring, 2-1 is a dovetail groove, 2-2 is a limiting groove, 3 is a tray fixing plate, 3-1 is a dovetail tenon, 3-2 is a fixing hole, 3-3 is a long waist-shaped groove, 4 is a bearing cushion plate, 5 is a tray, 5-1 is a wire rope through hole, 6 is a wire rope, 7 is a hinge ball, 7-1 is a fastening groove, 7-2 is a hoop, 7-3 is a groove, 8 is a first buffer ring, 9 is a second buffer ring, and 10 is a dust-proof baffle. Detailed implementation mode

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0037] As Figures 1 to 12 shown, an anti-seismic wrist at the connection part between the main body and the foundation of a building, an anti-seismic wrist at the combination part between the main body and the foundation of a building, divides the building main body and the building foundation into two parts, and designs a component - an anti-seismic wrist that can absorb and eliminate earthquake impact force between the two parts, making the rigid structure of the building design become a flexible structure similar to the function of a joint bone. Specifically as follows: It includes an upper anti-seismic wrist, a lower anti-seismic wrist, and a hinge ball 7. The upper anti-seismic wrist and the lower anti-seismic wrist are symmetrically arranged with respect to the hinge ball 7, and the upper anti-seismic wrist and the lower anti-seismic wrist swing out of position along the equatorial plane of the hinge ball 7. A fastening groove 7-1 is arranged horizontally at the equatorial position of the hinge ball 7. Two groups of U-shaped groove groups are arranged on the surface of the hinge ball 7. The opening directions of the two groups of groove groups are opposite, and the two groups of groove groups are perpendicular to each other. A number of grooves 7-3 are arranged at equal intervals in each group of groove groups. The grooves 7-3 in each group of groove groups are parallel to each other, and the plane where the grooves 7-3 are located is perpendicular to the equatorial plane. The head and tail ends of the grooves 7-3 intersect with the fastening groove 7-1.

[0038] The upper anti-seismic wrist and the lower anti-seismic wrist have the same structure. The upper anti-seismic wrist and the lower anti-seismic wrist both include a connecting sleeve 1, a protective ring 2, a buffer ring, a wire rope 6, a tray fixing plate 3, and a tray 5. The buffer ring includes a first buffer ring 8 arranged horizontally and a number of second buffer rings 9 arranged vertically.

[0039] The tray 5 is arranged in a frustum shape. The trays 5 are relatively arranged on both sides of the hinge ball 7, and the trays 5 are located at the opening positions of the U-shaped groove groups. The end face of the tray 5 close to the hinge ball 7 is in spherical fit with the hinge ball 7. A bearing cushion plate 4 is installed at the center of the tray 5. A wire rope through hole 5-1 is arranged at the edge of the tray 5 and at the position of the orthographic projection of the groove group.

[0040] The tray fixing plate 3 is arranged at the outer end face position of the tray 5. A dovetail tenon 3-1 is arranged on the side wall of the tray fixing plate 3. Fixing holes 3-2 are arranged at the positions of the tray fixing plate 3 corresponding to the wire rope through holes 5-1 at the edge. A long waist-shaped groove 3-3 is arranged between the end faces of adjacent fixing holes 3-2.

[0041] The two steel wire ropes 6 respectively pass through the wire rope through-holes 5-1, fixed holes 3-2 and grooves 7-3 corresponding to each group of groove groups. That is, the tray 5, the tray fixing plate 3 and the hinge ball 7 are flexibly connected by the steel wire ropes 6. Each steel wire rope 6 forms a U-shaped flexible connection body in space. The hoop 7-2 clamps the middle part of the flexible connection body in the fastening groove 7-1. The two groups of flexible connection bodies are perpendicular to each other in different planes and have opposite opening directions. The head and tail ends of the steel wire rope 6 are both fixedly connected to the tray fixing plate 3;

[0042] The protective ring 2 covers the outside of the tray 5, the tray fixing plate 3 and the hinge ball 7. One end of the outer wall of the protective ring 2 is provided with an external thread. One end of the connecting sleeve 1 is threadedly connected to the main body part or the foundation part of the building. The other end of the connecting sleeve 1 is threadedly connected to the protective ring 2. A dovetail groove 2-1 is provided on the inner wall of the protective ring 2 near the external thread side. The dovetail groove 2-1 is matched with the dovetail tenon 3-1. The tray fixing plate 3 is installed at the end face position of the protective ring 2; The end face of the protective ring 2 on the side away from the external thread is set in a wave shape, and a limiting groove 2-2 is provided on the wave-shaped end face; The peak position of the protective ring 2 in the upper anti-seismic wrist corresponds to the trough position of the protective ring 2 in the lower anti-seismic wrist, and the trough position of the protective ring 2 in the upper anti-seismic wrist corresponds to the peak position of the protective ring 2 in the lower anti-seismic wrist, and there is a gap between the protective rings 2 of the upper and lower anti-seismic wrists; The first buffer ring 8 is installed in the limiting groove 2-2 at the peak position, and a number of second buffer rings 9 are respectively installed between the limiting groove 2-2 at the trough position and the first buffer ring 8. A dust-proof baffle 10 is provided at the gap between the upper and lower anti-seismic wrists and outside the buffer rings.

[0043] Further, the diameter of the hinge ball 7 is 15 cm. Each group of groove groups on the hinge ball 7 includes seven grooves 7-3 arranged in parallel. The distance between adjacent grooves 7-3 is 1.2 cm, the depth of the groove 7-3 is 1.5 cm, and the width of the groove 7-3 is 1.2 cm.

[0044] Further, the thickness of the bearing pad 4 is 3 cm to 5 cm.

[0045] Further, the material of the tray 5 is rubber, and the material of the bearing pad 4 is rubber or steel.

[0046] Further, a number of threaded holes are provided on the side wall of the connecting sleeve 1 along the circumferential direction. The diameter of the threaded holes is 5 mm, and the distance between adjacent threaded holes is 30 mm. The anchor bolts are penetrated and arranged in the corresponding threaded holes. After the connecting sleeve 1 moves to the predetermined position, it is fixedly connected to the main body part or the foundation part of the building through concrete pouring and the anchor bolts.

[0047] Furthermore, the main body part or the foundation part of the building includes a hollow tube and end plates. The end plates include steel plates and rubber gaskets. The rubber gaskets are respectively arranged at both end faces of the steel plates. The steel plates are welded to the ends of the inner cavity of the hollow tube, and concrete is poured into the inner cavity of the hollow tube.

[0048] Furthermore, the steel wire ropes 6 connecting adjacent fixing holes 3-2 are clamped in the long waist-shaped grooves 3-3.

[0049] Furthermore, the contact surface between the bearing cushion plate 4 and the articulated ball 7 is set as a spherical surface fit.

[0050] Furthermore, the bearing cushion plate 4 includes at least two layers, and an oil film layer is filled between the end faces of adjacent bearing cushion plates 4. The thickness of the oil film layer is 3 mm to 5 mm.

[0051] The manufacturing method of the seismic wrist of the building column foundation in this embodiment includes the following steps:

[0052] First, determine the combination quantity and size of the seismic shock-absorbing wrists of the building column foundation according to the diameter of the building column wall foundation. Pour the connecting sleeve 1 and the main body part or the foundation part of the building with concrete, and fixedly connect them through anchor bolts.

[0053] Secondly, assemble the internal parts - the tray fixing plate 3, the bearing cushion plate 4, the tray 5, the steel wire ropes 6, the articulated ball 7, and the hoop 7-2:

[0054] Place trays 5 on both the upper and lower sides of the articulated ball 7, place the bearing cushion plate 4 at the center of the tray 5, place the tray fixing plate 3 at the outer end face of the tray 5, and make the wire rope through holes 5-1, the fixing holes 3-2, and the grooves 7-3 coaxially arranged; Pass two steel wire ropes 6 through the wire rope through holes 5-1, the fixing holes 3-2, and the grooves 7-3 corresponding to each group of groove groups on the articulated ball 7 respectively, so that the tray fixing plate 3, the tray 5, and the articulated ball 7 are flexibly connected by the steel wire ropes 6 to form a two-way multi-dimensional pulling force centered on the spherical body. Each steel wire rope 6 forms a U-shaped flexible connecting body in space. The hoop 7-2 clamps the middle part of the flexible connecting body in the fastening groove 7-1. The two groups of flexible connecting bodies are perpendicular to each other in different planes and have opposite opening directions. The head and tail ends of the steel wire ropes 6 are both fixedly connected to the tray fixing plate 3;

[0055] Thirdly, assemble the external parts - the protective ring 2, the buffer ring, and the dust-proof flap 10:

[0056] The peak position of the upper anti-seismic wrist middle guard ring 2 corresponds to the trough position of the lower anti-seismic wrist middle guard ring 2, the trough position of the upper anti-seismic wrist middle guard ring 2 corresponds to the peak position of the lower anti-seismic wrist middle guard ring 2, and a gap is provided between the guard rings 2 of the upper and lower anti-seismic wrists; the guard ring 2 and the tray fixing plate 3 are fixedly connected through a dovetail groove 2-1 and a dovetail tenon 3-1, the horizontal buffer ring 8 is installed in the limit groove 2-2 at the peak position, and a plurality of vertical buffer rings 9 are respectively installed between the limit groove 2-2 at the trough position and the buffer ring one 8, and the buffer ring one 8 and the buffer ring two 9 limit the hinge ball 7; a dust-proof baffle 10 is arranged at the gap between the upper and lower anti-seismic wrists and outside the buffer ring;

[0057] Finally, the connecting sleeve 1 and the guard ring 2 are threadedly connected. The combined part of the main body and the foundation of the building is flexibly connected through the anti-seismic wrist. The main building fixing part can form a rigid stress concentration through the restraint of the steel structure embedded part for the upper load, and form a force conduction with the anti-seismic wrist. The anti-seismic wrist continues to conduct the load to the building foundation.

[0058] The above is only the specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the technical field within the technical scope disclosed by the present invention should be covered by the protection scope of the present invention. Therefore, the protection scope of the present invention should be subject to the protection scope of the claimed rights.

Claims

1. An earthquake-resistant wrist at the connection part between the main body and the foundation of a building, characterized in that: It includes an upper anti-seismic wrist, a lower anti-seismic wrist and a hinge ball (7). The upper anti-seismic wrist and the lower anti-seismic wrist are symmetrically arranged with respect to the hinge ball (7), and the upper anti-seismic wrist and the lower anti-seismic wrist swing out of position with respect to the equatorial plane of the hinge ball (7). A fastening groove (7-1) is arranged horizontally at the equatorial position of the hinge ball (7). Two groups of U-shaped groove groups are arranged on the surface of the hinge ball (7). The opening directions of the two groups of groove groups are opposite to each other, and the two groups of groove groups are perpendicular to each other. A number of grooves (7-3) are arranged at equal intervals in each group of groove groups. The grooves (7-3) in each group of groove groups are parallel to each other, and the plane where the grooves (7-3) are located is perpendicular to the equatorial plane. The head and tail ends of the grooves (7-3) intersect with the fastening groove (7-1); The upper anti-seismic wrist and the lower anti-seismic wrist have the same structure. The upper anti-seismic wrist and the lower anti-seismic wrist both include a connecting sleeve (1), a protective ring (2), a buffer ring, a steel wire rope (6), a tray fixing plate (3) and a tray (5). The buffer ring includes a buffer ring one (8) arranged horizontally and a number of buffer ring twos (9) arranged vertically; The tray (5) is arranged in a frustum shape. The trays (5) are arranged on both sides of the hinge ball (7) relatively, and the trays (5) are located at the opening positions of the U-shaped groove groups. The end face of the tray (5) close to the hinge ball (7) is in spherical fit with the hinge ball (7). A bearing cushion plate (4) is installed at the center of the tray (5). A steel wire rope through hole (5-1) is arranged at the edge of the tray (5) and at the position of the orthographic projection of the groove group; The tray fixing plate (3) is arranged at the outer end face position of the tray (5). A dovetail tenon (3-1) is arranged on the side wall of the tray fixing plate (3). A fixing hole (3-2) is arranged at the position of the tray fixing plate (3) corresponding to the steel wire rope through hole (5-1) at the edge. A long waist-shaped groove (3-3) is arranged between the end faces of adjacent fixing holes (3-2); The two steel wire ropes (6) respectively pass through the steel wire rope through holes (5-1), fixing holes (3-2) corresponding to each group of groove groups and the grooves (7-3). That is, the tray (5), the tray fixing plate (3) and the hinge ball (7) are flexibly connected by the steel wire ropes (6). Each steel wire rope (6) forms a U-shaped flexible connection body in space. A hoop (7-2) clamps the middle part of the flexible connection body in the fastening groove (7-1). The two flexible connection bodies are skew perpendicular and have opposite opening directions. The head and tail ends of the steel wire ropes (6) are fixedly connected to the tray fixing plate (3); The protection ring (2) covers the outside of the tray (5), the tray fixing plate (3) and the articulated ball (7). One end of the outer wall of the protection ring (2) is provided with an external thread. One end of the connecting sleeve (1) is threadedly connected to the main body part or the foundation part of the building, and the other end of the connecting sleeve (1) is threadedly connected to the protection ring (2). A dovetail groove (2-1) is provided on the inner wall of the protection ring (2) near the external thread side, and the dovetail groove (2-1) is matched with the dovetail tenon (3-1). The tray fixing plate (3) is installed at the end face position of the protection ring (2). The end face of the protection ring (2) on the side away from the external thread is set to be wavy, and a limiting groove (2-2) is provided on the wavy end face. The peak position of the protection ring (2) in the upper anti-seismic wrist corresponds to the valley position of the protection ring (2) in the lower anti-seismic wrist, and the valley position of the protection ring (2) in the upper anti-seismic wrist corresponds to the peak position of the protection ring (2) in the lower anti-seismic wrist, and a gap is provided between the protection rings (2) of the upper and lower anti-seismic wrists. The first buffer ring (8) is installed in the limiting groove (2-2) at the peak position, and several second buffer rings (9) are respectively installed between the limiting groove (2-2) at the valley position and the first buffer ring (8). A dust-proof baffle (10) is provided at the gap between the upper and lower anti-seismic wrists and outside the buffer rings.

2. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: The diameter of the articulated ball (7) is 15 cm. Each group of the groove groups on the articulated ball (7) includes seven grooves (7-3) arranged in parallel. The distance between adjacent grooves (7-3) is 1.2 cm, the depth of the grooves (7-3) is 1.5 cm, and the width of the grooves (7-3) is 1.2 cm.

3. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: The thickness of the bearing plate (4) is 3-5 cm.

4. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: The material of the tray (5) is rubber, and the material of the bearing plate (4) is rubber or steel.

5. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: A number of threaded holes are arranged on the side wall of the connecting sleeve (1) along the circumferential direction. The diameter of the threaded holes is 5 mm, and the distance between adjacent threaded holes is 30 mm. The anchoring bolts are arranged through the corresponding threaded holes. After the connecting sleeve (1) moves to the predetermined position, it is fixedly connected to the main body part or the foundation part of the building through concrete pouring and the anchoring bolts.

6. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1 or 5, characterized in that: The main body part or the foundation part of the building includes a hollow pipe and end plates. The end plates include steel plates and rubber gaskets. The rubber gaskets are respectively arranged at both end face positions of the steel plates. The steel plates are welded to the ends of the inner cavity of the hollow pipe, and concrete is poured into the inner cavity of the hollow pipe.

7. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: The steel wire rope (6) connecting adjacent fixing holes (3-2) is clamped in the long waist-shaped groove (3-3).

8. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1, characterized in that: The contact surface between the bearing plate (4) and the articulated ball (7) is set to be a spherical surface fit.

9. The earthquake-resistant wrist at the connection part between the main body and the foundation of a building according to claim 1 or 8, characterized in that: The bearing plate (4) includes at least two layers, and an oil film layer with a thickness of 3 mm-5 mm is filled between the end faces of adjacent bearing plates (4).

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