Connecting device for high-strength steel structure joints and using method of connecting device

Abstract

The invention relates to the technical field of steel structure connection, and discloses a high-strength steel structure joint connecting device and a using method thereof.The connecting device comprises a device body and connecting bases arranged on the two opposite side faces of the device body, and inner clamping blocks fixedly connected to the side faces of the device body are arranged in the connecting bases; a steel structure body is inserted between the connecting base and the inner clamping block, and the steel structure body and the connecting base are detachably and fixedly connected through a positioning mechanism. Firm connection of steel structural members can be effectively achieved, under the earthquake action or the low-temperature environment, the structural stability is ensured, the bearing capacity is improved, meanwhile, the connecting structure is suitable for various complex structural forms, and mounting and dismounting are convenient.

Description

Technical Field

[0001] The present invention relates to the technical field of steel structure connection, and more particularly to a connection device for a high-strength steel structure node and a use method thereof. Background Art

[0002] At present, steel structures are widely used in my country's construction engineering field due to their light weight, high strength, excellent toughness, and high construction efficiency. However, my country is one of the countries prone to earthquakes. The structural damage caused by earthquakes often leads to serious casualties and property losses. In addition, the temperature in most parts of my country is below zero in winter. The low temperature environment will reduce the strength and toughness of steel structures and induce stress concentration. Therefore, improving the seismic and low temperature resistance of steel structures is crucial to ensure project safety.

[0003] Due to the structural characteristics of steel structures, their nodes are often the weak parts of the structure. The connection methods of traditional steel structures mainly include welding, riveting and bolting. Among them, although welding can achieve a firm connection, it will produce residual stress and residual deformation, and may cause defects, thereby reducing the bearing capacity, stiffness and fatigue strength of the structure. Riveting and bolting are easily affected by vibration and low temperature. Vibration will cause bolts or rivets to be repeatedly stressed, causing them to gradually loosen. In addition, at low temperatures, the thermal expansion and contraction of steel materials will intensify, which will cause gaps in the joints and easily cause bolts or rivets to loosen. Therefore, during use, when the steel structure is affected by vibration or low temperature, traditional bolts or rivets are prone to loosening, resulting in loose node connections, affecting the overall stability of the steel structure, and may even cause destructive safety accidents such as collapse.

[0004] In order to solve the defects of traditional steel structure node connections and improve the seismic and low-temperature resistance of the nodes, it is necessary to develop a new type of high-strength steel structure node connection device, thereby reducing the degree of damage to steel structure buildings caused by natural disasters such as earthquakes and low-temperature environments, and protecting people’s lives and property. Summary of the invention

[0005] In view of this, the present invention provides a connection device for high-strength steel structure nodes, which can effectively achieve a firm connection of steel structure components, ensure structural stability and improve bearing capacity under earthquake or low temperature environment, and is suitable for various complex structural forms, especially for the connection of H-shaped steel, which is convenient for installation and disassembly.

[0006] To achieve the above-mentioned purpose, the connection device of the high-strength steel structure node provided by the present invention includes a device body and a connection seat arranged on two opposite sides of the device body, the interior of the connection seat is provided with an inner clamping block fixedly connected to the side of the device body, a steel structure body is inserted between the connection seat and the inner clamping block, and a detachable fixed connection is achieved between the steel structure body and the connection seat through a positioning mechanism.

[0007] Preferably, the positioning mechanism includes a plurality of threaded holes provided on the side surfaces of adjacent device bodies on the connecting seat and fixing bolts screwed into the threaded holes, the threaded holes sequentially passing through the side walls of the steel structure body and the inner block in a direction perpendicular to the side surfaces of the connecting seat, and a rotating plate for driving the fixing bolt to rotate is fixedly provided at the outer end of the fixing bolt.

[0008] Preferably, the interior of the fixing bolt is provided with a threaded barrel arranged along its axial direction, a push rod is screwed in the threaded barrel, a sliding groove is provided on the side wall of the inner end of the fixing bolt, a sliding block is provided in the sliding groove, the inner end of the sliding block is movably connected to the sliding groove, and inclined surfaces are provided on the surfaces of the push rod in contact with the sliding block, and when the push rod is screwed inward, the push rod pushes the free end of the sliding block out of the sliding groove.

[0009] Preferably, an accommodation groove is provided on the slide groove, and a connecting plate is fixedly connected to the side surface of the inner end of the sliding block, the connecting plate is movably connected to the accommodation groove, the side surface of the connecting plate is fixedly connected to one end of a return spring, and the other end of the return spring is fixedly connected to the inner surface of the accommodation groove, and when the push rod is screwed outward, the return spring is used to pull the sliding block back to its original position.

[0010] Preferably, a sleeve is threadedly connected to the rotating plate, and a buffer spring and a damper are fixedly connected to the inner surface of the sleeve. The damper is located inside the buffer spring. The damper and buffer spring cooperate to push the sleeve against the connecting seat to absorb vibration and impact, and the reaction force is used to relatively fix the fixing bolt and the threaded hole.

[0011] Preferably, the other end of the damper and buffer spring is fixedly connected to a connecting plate, and a turntable is rotatably connected to a side of the connecting plate close to the connecting seat. The turntable is movably abutted against the side surface of the connecting seat, and the rotating connection of the turntable connecting plate is used to prevent the turntable from driving the buffer spring and the damper to twist together when rotating.

[0012] Preferably, a carrying plate and a sealing plate are fixedly connected to the inner surface of the device body, a heating chamber is formed between the carrying plate and the sealing plate, and the sealing plate is located below the carrying plate. The device body is provided with a jet outlet penetrating one side of a connecting seat, and the jet outlet is connected to the heating chamber and is used to spray the gas in the heating chamber toward the fixing bolt.

[0013] Preferably, the upper surface of the sealing plate is provided with a heating plate for heating the air in the heating chamber, the upper surface of the supporting plate is fixedly connected with a fan pipe connected to the heating chamber, the inner wall of the fan pipe is provided with a fan assembly, and the fan assembly is used to discharge the gas heated by the heating plate from the heating chamber and spray it toward the fixing bolt from the air outlet.

[0014] Preferably, the fan assembly includes a motor and a bracket for fixedly connecting the motor, a fan blade is provided on the output end of the motor, the motor drives the fan blade to rotate, and draws external air into the heating chamber, the bracket is fixedly connected to the inner wall of the fan pipe, and the upper surface of the supporting plate is provided with a guard plate for protecting the fan assembly.

[0015] A method for using the connection device of the high-strength steel structure node as described above comprises: During installation, insert the steel structure body into the gap between the connecting seat and the inner block, then insert the fixing bolt into the threaded hole, screw the fixing bolt into the threaded hole by rotating the plate until the free end of the slider passes over the inner surface of the inner block, and screw the ejector rod with a cross screwdriver to screw it inward and contact the slider. Under the action of the inclined surface, the free end of the slider will be ejected. After ejection, screw the fixing bolt outward again until the free end of the slider presses against the inner surface of the inner block from the inside out to form a stable mechanical locking structure. Subsequently, screw the sleeve with a cross screwdriver to drive the buffer spring and damper to move inward, so that the turntable contacts the side of the connecting seat, compressing the buffer spring and damper to form a reaction force to fix the fixing bolt, and when the steel structure body is subjected to vibration or impact, the buffer spring and damper can absorb and disperse energy to prevent the fixing bolt from loosening. During disassembly, use a Phillips screwdriver to twist the sleeve outward to loosen the buffer spring and the damper. Then, use a Phillips screwdriver to twist the push rod outward. After the push rod is screwed out, the slide block is pulled inward to return to its original position by the return spring. Then, unscrew the fixing bolt and remove the steel structure body from the connecting seat.

[0016] Through the above technical scheme, it can be known that compared with the prior art, the connection device of the high-strength steel structure node provided by the present invention can effectively realize the firm connection of steel structure members, ensure the structural stability and improve the bearing capacity under the action of earthquake or low temperature environment, and further, by twisting the push rod inward to push the slider outward, after being pushed out, the fixing bolt is twisted outward to make the slider reversely push against the inner block to form a stable mechanical locking structure, and the slider can effectively prevent the fixing bolt from retreating and prevent the fixing bolt from loosening due to vibration or other factors, and no nut is required, thereby avoiding the loosening of the nut when the traditional nut is matched with the bolt, and then, the sleeve is twisted downward by a cross screwdriver to make the turntable contact the connecting seat to compress the buffer spring and the damper, and when the steel structure is subjected to vibration or impact, the buffer spring and the damper can absorb and disperse energy to ensure that the fixing bolt will not loosen, thereby greatly enhancing the firmness of the connection between the steel structure body and the connecting seat, and can effectively withstand various external forces. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the connection device of the high-strength steel structure node of the present invention; Figure 2 It is a side cross-sectional schematic diagram of a connection device for a high-strength steel structure node of the present invention; Figure 3 It is a front cross-sectional schematic diagram of a connection device for a high-strength steel structure node of the present invention; Figure 4 For the present invention Figure 1 A partial enlarged view of part A; Figure 5 For the present invention Figure 2 A partial enlarged view of part B.

[0019] Explanation of the accompanying drawings: 1. threaded hole; 2. connecting seat; 3. inner block; 4. steel structure body; 5. connecting plate; 6. drain outlet; 7. cross groove; 8. push rod; 9. device body; 10. buffer spring; 11. damper; 12. rotating plate; 13. sleeve; 14. fixing bolt; 15. turntable; 16. placement groove; 17. slide groove; 18. threaded cylinder; 19. slider; 20. reset spring; 21. connecting plate; 22. inclined plane; 23. fan blade; 24. bracket; 25. fan pipe; 26. support rod; 27. guard plate; 28. motor; 29. ​​load-bearing plate; 30. heating chamber; 31. jet nozzle; 32. sealing plate; 33. heating plate. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Please see attached Figure 1-5 , which is a connection device for a high-strength steel structure node disclosed in the present invention.

[0022] The connection device for the high-strength steel structure node provided by the present invention comprises a device body 9 , a connection seat 2 , and a steel structure body 4 .

[0023] The connecting seat 2 and the inner clamping block 3 are both arranged on two opposite sides of the device body 9. The inner clamping block 3 is arranged inside the connecting seat 2, and a gap is formed between the connecting seat 2 and the inner clamping block 3. A steel structure body 4 is inserted in the gap between the connecting seat 2 and the inner clamping block 3. A detachable fixed connection is achieved between the steel structure body 4 and the connecting seat 2 through a positioning mechanism.

[0024] Specifically, the device body 9 is used to carry the overall components, the connecting seat 2 and the inner block 3 are used to connect the steel structure body 4 and fix the position of the steel structure body 4, the steel structure body 4 is detachably fixedly connected between the connecting seat 2 and the inner block 3, and a plurality of threaded holes 1 are provided on the connecting seat 2, the inner block 3, and the steel structure body 4, which are used to connect the fixing bolts 14 so that the steel structure body 4 can be inserted into the gap between the connecting seat 2 and the inner block 3 and then fixed.

[0025] The positioning mechanism includes a plurality of threaded holes 1 provided on the side surfaces of the adjacent device main body 9 on the connecting seat 2 and fixing bolts 14 screwed into the threaded holes 1. The inner walls of the plurality of threaded holes 1 are threadedly connected with the fixing bolts 14. The threaded holes 1 sequentially penetrate the side walls of the steel structure main body 4 and the inner clamping block 3 in a direction perpendicular to the side surfaces of the connecting seat 2. A rotating plate 12 for driving the fixing bolt to rotate is fixedly provided at the outer end of the fixing bolt 14 to facilitate the rotation of the fixing bolt 14.

[0026] In order to further optimize the above technical solution and increase the connection stability of the connecting device, in the present embodiment, a threaded barrel 18 is provided inside the fixing bolt 14 along its axial direction, a push rod 8 is screwed inside the threaded barrel 18, a slide groove 17 is provided on the side wall of the inner end of the fixing bolt 14, a slider 19 is provided in the slide groove 17, an inner end of the slider 19 is movably connected to the slide groove 17, and inclined surfaces 22 are provided on the contact surfaces of the push rod 8 and the slider 19. When the push rod 8 is screwed inward, the push rod 8 pushes the free end of the slider 19 out of the slide groove 17.

[0027] It should be noted that the slider 19 is slidably connected to the inner surface of the slide groove 17. The slide groove 17 is used to accommodate the slider 19 and enable the slider 19 to be moved in the slide groove 17, so that when the slider 19 slides out, it is stuck on the inner surface of the inner block 3 from the inside, so that the fixing bolt 14 is locked and will not fall off. The slider 19 and the inner surface of the inner block 3 are movably connected to each other. Specifically, in order to achieve the sliding out of the slider 19, the slide groove 17 is connected to the threaded barrel 18, and the inner surface of the threaded barrel 18 is threadedly connected with the push rod 8. The push rod 8 and the slider 19 are both provided with inclined surfaces 22 to facilitate the contact between the push rod 8 and the slider 19. The outer end of the push rod 8 is provided with a cross groove 7. The push rod 8 is continuously screwed into the threaded barrel 18 by an adapted cross screwdriver. The inclined surface 22 on the push rod 8 and the inclined surface 22 on the slider 19 begin to contact and the contact surface gradually increases. The slider 19 is ejected through the movable abutment connection between the push rod 8 and the slider 19.

[0028] In order to further optimize the above technical solution and make the connecting device convenient to disassemble and reuse, in the present embodiment, a receiving groove 16 is provided on the slide groove 17, and a connecting plate 21 is fixedly connected to the side surface of the inner end of the slider 19, the connecting plate 21 is movably connected to the receiving groove 16, and the side surface of the connecting plate 21 is fixedly connected to one end of a return spring 20, and the other end of the return spring 20 is fixedly connected to the inner surface of the receiving groove 16, and when the push rod 8 is screwed outward, the return spring 20 is used to pull the slider 19 back to its original position.

[0029] Specifically, a seating groove 16 is provided on the slide groove 17 for connecting a return spring 20, and the side surface of the slider 19 is fixedly connected to the connecting plate 21. In order to make the connecting plate 21 movably connected to the seating groove 16, one end of the return spring 20 is fixedly connected to the side surface of the connecting plate 21, and the other end of the return spring 20 is fixedly connected to the inner surface of the seating groove 16, so that when the push rod 8 is screwed outward, the return spring 20 pulls the slider 19 back to its original position, and then the fixing bolt 14 can be screwed out of the threaded hole 1, so as to release the fixation between the connecting seat 2 and the steel structure body 4.

[0030] In order to further optimize the above technical solution, a sleeve 13 is threadedly connected to the rotating plate 12, and a buffer spring 10 and a damper 11 are fixedly connected to the inner surface of the sleeve 13. The damper 11 is located inside the buffer spring 10. The damper 11 and the buffer spring 10 cooperate to push the sleeve 13 against the connecting seat 2 to absorb vibration and impact, and the reaction force is used to relatively fix the fixing bolt 14 and the threaded hole 1.

[0031] Specifically, the sleeve 13 is used to internally connect the buffer spring 10 and the damper 11. The damper 11 is used to cooperate with the buffer spring 10 to press on the connecting seat 2, fix the fixing bolt 14 through the reaction force, and can absorb vibration and impact to increase the fixing strength. A cross slot 7 is also provided at one end of the sleeve 13 for adapting a cross screwdriver for screwing.

[0032] In order to further optimize the above technical solution, the other end of the damper 11 and the buffer spring 10 is fixedly connected with a connecting plate 5, and the connecting plate 5 is rotatably connected with a turntable 15 on a side close to the connecting seat 2. The turntable 15 is movably abutted against the side surface of the connecting seat 2, and the rotational connection between the turntable 15 and the connecting plate 5 is used to prevent the turntable 15 from driving the buffer spring 10 and the damper 11 to twist together when rotating.

[0033] In order to further optimize the above technical solution, a carrying plate 29 and a sealing plate 32 are fixedly connected to the inner surface of the device body 9, a heating chamber 30 is formed between the carrying plate 29 and the sealing plate 32, and the sealing plate 32 is located below the carrying plate 29. The device body 9 is provided with a jet port 31 penetrating therethrough on one side of the connecting seat, and the jet port 31 is connected to the heating chamber 30 for spraying the gas in the heating chamber 30 toward the fixing bolt 14.

[0034] Specifically, the inner surface of the device body 9 is fixedly connected to a supporting plate 29, and the upper surface of the supporting plate 29 is fixedly connected to a fan tube 25 connected to the heating chamber 30, so that the device body 9 has the function of connecting to the fan tube 25. The heating chamber 30 is used to store the heated airflow internally, and the jet port 31 is used to spray toward the fixing bolt 14 when the fan assembly is started.

[0035] A heating plate 33 for heating the air in the heating chamber 30 is provided on the upper surface of the sealing plate 32. A fan tube 25 communicating with the heating chamber 30 is fixedly connected to the upper surface of the supporting plate 29. A fan assembly is provided on the inner wall of the fan tube 25. The fan assembly is used to discharge the gas heated by the heating plate 33 from the heating chamber 30 and spray it toward the fixing bolt 14 through the air jet port 31.

[0036] Specifically, the heating plate 33 is located inside the heating chamber 30, and the fan pipe 25 is used to connect and fix the fan assembly. The fan assembly blows the gas heated by the heating plate 33 toward the fixing bolt 14 to de-ice in cold seasons and prevent the connecting device from being frozen.

[0037] It should be noted that the fan assembly includes a motor 28 and a bracket 24 for fixing the motor 28. The output end of the motor 28 is provided with a fan blade 23. The motor 28 drives the fan blade 23 to rotate to draw external air into the heating chamber 30. The bracket 24 is fixedly connected to the inner wall of the fan pipe 25. The upper surface of the supporting plate 29 is provided with a protective plate 27 for protecting the fan assembly.

[0038] Specifically, the upper surface of the bearing plate 29 is fixedly connected with a support rod 26, the upper end of the support rod 26 is fixedly connected with a guard plate 27, the fan assembly is located below the guard plate 27, and the guard plate 27 is used to protect the fan assembly to avoid environmental erosion and pressure damage.

[0039] In order to further optimize the above technical solution, a drain outlet 6 is provided on the device body 9. The drain outlet 6 is located on the other two side surfaces of the device body 9 (i.e., on the sides adjacent to the connecting seat 2), and is connected to the outer surface of the supporting plate 29 to discharge the water on the surface of the supporting plate 29 in time to prevent water from accumulating on the surface of the supporting plate 29 and causing rust and freezing.

[0040] It should be noted that the supporting plate 29 and the sealing plate 32 as well as the heating chamber 30 formed by the two can be provided with two groups, which are symmetrically arranged up and down on the inner surface of the device body 9 to perform de-icing and other operations on multiple fixing bolts 14. Similarly, the fan assembly and other devices are correspondingly equipped.

[0041] The method for using the connection device of the high-strength steel structure node of the present invention is: During installation, the steel structure body 4 is inserted into the gap between the connecting seat 2 and the inner block 3. After insertion, the fixing bolt 14 is inserted into the threaded hole 1, and the fixing bolt 14 is screwed into the threaded hole 1 by rotating the plate 12 until the free end of the slider 19 passes over the inner surface of the inner block 3, and the ejector rod 8 is screwed inwardly by a cross screwdriver to contact the slider 19. Under the action of the inclined surface 22, the free end of the slider 19 will be ejected. After ejection, the fixing bolt 14 is screwed outward until the free end of the slider 19 is pushed against the inner surface of the inner block 3 from the inside to the outside, forming a stable mechanical locking structure. Subsequently, the sleeve 13 is screwed by a cross screwdriver to drive the buffer spring The spring 10 and the damper 11 move inward, so that the turntable 15 contacts the side of the connecting seat 2, compressing the buffer spring 10 and the damper 11, forming a reaction force to fix the fixing bolt 14, and when the steel structure body 4 is subjected to vibration or impact, the buffer spring 10 and the damper 11 can absorb and disperse energy to ensure that the fixing bolt will not loosen. During disassembly, the sleeve 13 is twisted outward with a cross screwdriver to loosen the buffer spring 10 and the damper 11, and then the push rod 8 is twisted outward with a cross screwdriver. After the push rod 8 is screwed out, the slider 19 is pulled inward to its original position by the reset spring 20, and then the fixing bolt 14 is screwed out to remove the steel structure body 4 from the connecting seat 2.

[0042] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection device for a high-strength steel structure node, characterized in that: The invention comprises a device body (9) and a connecting seat (2) arranged on two opposite sides of the device body (9); an inner clamping block (3) fixedly connected to the side of the device body (9) is arranged inside the connecting seat (2); a steel structure body (4) is inserted between the connecting seat (2) and the inner clamping block (3); and a detachable fixed connection is achieved between the steel structure body (4) and the connecting seat (2) via a positioning mechanism.

2. The connection device of the high-strength steel structure node according to claim 1, characterized in that: The positioning mechanism comprises a plurality of threaded holes (1) provided on the side surfaces of the adjacent device main body (9) on the connecting seat (2) and fixing bolts (14) screwed into the threaded holes (1), wherein the threaded holes (1) sequentially penetrate the side walls of the steel structure main body (4) and the inner clamping block (3) in a direction perpendicular to the side surfaces of the connecting seat (2), and a rotating plate (12) for driving the fixing bolt to rotate is fixedly provided at the outer end of the fixing bolt (14).

3. The connection device of high-strength steel structure node according to claim 2, characterized in that: The fixing bolt (14) is provided with a threaded barrel (18) arranged along its axial direction, and a push rod (8) is screwed into the threaded barrel (18). A slide groove (17) is provided on the side wall of the inner end of the fixing bolt (14), and a slider (19) is provided in the slide groove (17). The inner end of the slider (19) is movably connected to the slide groove (17). The surfaces of the push rod (8) and the slider (19) that are in contact are provided with inclined surfaces (22). When the push rod (8) is screwed inward, the push rod (8) pushes the free end of the slider (19) out of the slide groove (17).

4. The connection device for high-strength steel structure nodes according to claim 3, characterized in that: The slide groove (17) is provided with a seating groove (16); a connecting plate (21) is fixedly connected to the side surface of the inner end of the slider (19); the connecting plate (21) is movably connected to the seating groove (16); a side surface of the connecting plate (21) is fixedly connected to one end of a return spring (20); the other end of the return spring (20) is fixedly connected to the inner surface of the seating groove (16); when the push rod (8) is screwed outward, the return spring (20) is used to pull the slider (19) back to its original position.

5. The connection device of high-strength steel structure node according to claim 2, characterized in that: A sleeve (13) is threadedly connected to the rotating plate (12); a buffer spring (10) and a damper (11) are fixedly connected to the inner surface of the sleeve (13); the damper (11) is located inside the buffer spring (10); the damper (11) and the buffer spring (10) cooperate to press the sleeve (13) against the connecting seat (2) to absorb vibration and impact, and to relatively fix the fixing bolt (14) and the threaded hole (1) through a reaction force.

6. The connection device for high-strength steel structure nodes according to claim 5, characterized in that: The other ends of the damper (11) and the buffer spring (10) are fixedly connected to a connecting plate (5); a surface of the connecting plate (5) close to the connecting seat (2) is rotatably connected to a rotating disk (15); the rotating disk (15) is movably in contact with a side surface of the connecting seat (2); the rotating connection between the rotating disk (15) and the connecting plate (5) is used to prevent the rotating disk (15) from driving the buffer spring (10) and the damper (11) to twist together when the rotating disk (15) rotates.

7. The connection device for high-strength steel structure nodes according to claim 2, characterized in that: A carrying plate (29) and a sealing plate (32) are fixedly connected to the inner surface of the device body (9); a heating chamber (30) is formed between the carrying plate (29) and the sealing plate (32); and the sealing plate (32) is located below the carrying plate (29); a through-going air jet (31) is provided on one side of the device body (9) provided with a connecting seat; the air jet (31) is communicated with the heating chamber (30) and is used to eject the gas in the heating chamber (30) toward the fixing bolt (14).

8. The connection device for high-strength steel structure nodes according to claim 7, characterized in that: The upper surface of the sealing plate (32) is provided with a heating plate (33) for heating the air in the heating chamber (30); the upper surface of the supporting plate (29) is fixedly connected with a fan pipe (25) in communication with the heating chamber (30); the inner wall of the fan pipe (25) is provided with a fan assembly, and the fan assembly is used to discharge the gas heated by the heating plate (33) from the heating chamber (30) and spray it toward the fixing bolt (14) through the air jet port (31).

9. The connection device for high-strength steel structure nodes according to claim 8, characterized in that: The fan assembly comprises a motor (28) and a bracket (24) for fixedly connecting the motor (28); a fan blade (23) is provided on the output end of the motor (28); the motor (28) drives the fan blade (23) to rotate, thereby drawing external air into the heating chamber (30); the bracket (24) is fixedly connected to the inner wall of the fan pipe (25); and a guard plate (27) for protecting the fan assembly is provided on the upper surface of the bearing plate (29).

10. A method for using the connection device of the high-strength steel structure node according to any one of claims 1 to 9, characterized in that: include: During installation, the steel structure body (4) is inserted into the gap between the connecting seat (2) and the inner block (3), and then the fixing bolt (14) is inserted into the threaded hole (1). The fixing bolt (14) is screwed into the threaded hole (1) by rotating the plate (12) until the free end of the slider (19) passes over the inner surface of the inner block (3). The ejector rod (8) is screwed inwardly by a cross screwdriver to contact the slider (19). Under the action of the inclined surface (22), the free end of the slider (19) is ejected. After being ejected, the fixing bolt (14) is screwed outwardly until the slider (19) is in contact with the inner block (3). The free end of the inner end of the inner block (9) is pressed against the inner surface of the inner block (3) from the inside to the outside, forming a stable mechanical locking structure. Subsequently, the sleeve (13) is screwed with a cross screwdriver to drive the buffer spring (10) and the damper (11) to move inward, so that the turntable (15) contacts the side of the connecting seat (2), so that the buffer spring (10) and the damper (11) are compressed, forming a reaction force to fix the fixing bolt (14), and when the steel structure body (4) is vibrated or impacted, the buffer spring (10) and the damper (11) can absorb and disperse energy, so that the fixing bolt (14) will not loosen; During disassembly, the sleeve (13) is twisted outwardly by a cross screwdriver to loosen the buffer spring (10) and the damper (11). Subsequently, the push rod (8) is twisted outwardly by a cross screwdriver. After the push rod (8) is screwed outwardly, the slider (19) is pulled inwardly back to its original position by the return spring (20). Subsequently, the fixing bolt (14) is screwed out to remove the steel structure body (4) from the connecting seat (2).

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