A connection device for high-strength steel structure nodes and its use method

Abstract

The present invention relates to the technical field of steel structure connections, and discloses a connection device for high-strength steel structure nodes and a method for using the same. The connection device comprises a device body and a connection seat provided on two opposing sides of the device body. The connection seat is internally 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. The steel structure body and the connection seat are detachably fixedly connected via a positioning mechanism. The present invention can effectively achieve a secure connection of steel structure components, ensuring structural stability and improving load-bearing capacity in earthquakes or low-temperature environments. The present invention is also applicable to various complex structural forms and facilitates installation and disassembly.

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 method for using the same. Background Art

[0002] Currently, steel structures are widely used in my country's construction industry due to their lightweight, high-strength, excellent toughness, and high construction efficiency. Winter temperatures in most parts of my country drop below freezing, which can 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 ensuring project safety.

[0003] Due to the structural characteristics of steel structures, their nodes are often the weak parts of the structure. Traditional steel structure connection methods 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 the 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 be aggravated, which will cause gaps in the joints and easily cause the 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 environments, and is suitable for various complex structural forms, especially for the connection of H-shaped steels, 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 internal clamping block fixedly connected to the side of the device body, and a steel structure body is inserted between the connection seat and the internal clamping block. The steel structure body and the connection seat are detachably fixedly connected by a positioning mechanism.

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

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

[0009] Preferably, a seating groove is provided on the slide groove, and a connecting plate is fixedly connected to the side surface of the inner end of the slider, the connecting plate is movably connected to the seating 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 seating groove. When the push rod is screwed outward, the return spring is used to pull the slider 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 the 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 the connecting plate is rotatably connected to a turntable on a side 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 twisting the buffer spring and the damper together when rotating.

[0012] Preferably, a supporting plate and a sealing plate are fixedly connected to the inner surface of the device body, a heating chamber is formed between the supporting plate and the sealing plate, and the sealing plate is located below the supporting plate. The device body is provided with a through-jet port on one side of the connecting seat, and the jet port 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 communicating with 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 for the high-strength steel structure node as described above comprises:

[0016] 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 the inner surface of the inner block, and use a cross screwdriver to screw the ejector rod 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 until the free end of the slider presses against the inner surface of the inner block from the inside out, forming a stable mechanical locking structure. Subsequently, use a cross screwdriver to screw the sleeve 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, forming 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;

[0017] During disassembly, use a Phillips screwdriver to twist the sleeve outward to loosen the buffer spring and damper. Then, use a Phillips screwdriver to twist the push rod outward. After the push rod is screwed out, use the reset spring to pull the slider inward to return it to its original position. Then, unscrew the fixing bolt and remove the steel structure body from the connecting seat.

[0018] Through the above technical solution, it can be seen 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 components, ensure structural stability and improve bearing capacity under earthquake or low temperature environment, further, by twisting the push rod inward to push the slider outward, after being pushed out, twisting the fixing bolt outward to make the slider reversely push against the inner block, forming a stable mechanical locking structure, the slider can effectively prevent the fixing bolt from retreating, and prevent the fixing bolt from loosening due to vibration or other factors, and does not require a nut, avoiding the loosening of the nut when the traditional nut is matched with the bolt, then, the sleeve is twisted downward with a cross screwdriver to make the turntable contact the connecting seat, so that the buffer spring and the damper are compressed, 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, 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

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0020] Figure 1 This is a schematic diagram of the three-dimensional structure of the connection device of the high-strength steel structure node of the present invention;

[0021] Figure 2 It is a side cross-sectional schematic diagram of the connection device of the high-strength steel structure node of the present invention;

[0022] Figure 3 It is a front cross-sectional schematic diagram of the connection device of the high-strength steel structure node of the present invention;

[0023] Figure 4 For the present invention Figure 1 A partial enlarged view of part A;

[0024] Figure 5 For the present invention Figure 2 A partial enlarged view of part B.

[0025] Explanation of the accompanying symbols: 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

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0027] Please see the attached Figure 1-5 , is a connection device for a high-strength steel structure node disclosed in the present invention.

[0028] The connection device for a high-strength steel structure node provided by the present invention includes a device body 9 , a connection seat 2 , and a steel structure body 4 .

[0029] 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 into the gap between the connecting seat 2 and the inner clamping block 3. The steel structure body 4 and the connecting seat 2 are detachably fixedly connected through a positioning mechanism.

[0030] Specifically, the device body 9 is used to carry the overall components, the connecting seat 2 and the inner clamping 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 fixed between the connecting seat 2 and the inner clamping block 3, and a plurality of threaded holes 1 are provided on the connecting seat 2, the inner clamping 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 clamping block 3 and then fixed.

[0031] 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 pass through the side walls of the steel structure body 4 and the inner clamping block 3 in sequence 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 fixed to the outer end of the fixing bolt 14 to facilitate the rotation of the fixing bolt 14.

[0032] In order to further optimize the above technical solution and increase the connection stability of the connecting device, in this embodiment, the interior of the fixing bolt 14 is provided with a threaded barrel 18 arranged along its axial direction, and the threaded barrel 18 is screwed with a push rod 8. 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, and the contact surfaces of the push rod 8 and the slider 19 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.

[0033] 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.

[0034] 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 to 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 with 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 becomes larger. The slider 19 is ejected through the movable counter-connection between the push rod 8 and the slider 19.

[0035] In order to further optimize the above technical solution and make the connecting device convenient to disassemble and reuse, in this embodiment, a placement groove 16 is provided on the slide groove 17, and the side surface of the inner end of the slider 19 is fixedly connected to a connecting plate 21, and the connecting plate 21 is movably connected to the placement groove 16. The side surface of the connecting plate 21 is fixedly connected to one end of the return spring 20, and the other end of the return spring 20 is fixedly connected to the inner surface of the placement 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.

[0036] Specifically, a seating groove 16 is provided on the slide 17 for connecting the 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 out, 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 to release the fixation between the connecting seat 2 and the steel structure body 4.

[0037] In order to further optimize the above technical solution, a sleeve 13 is threadedly connected to the rotating plate 12, and the inner surface of the sleeve 13 is fixedly connected to a buffer spring 10 and a damper 11. 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.

[0038] 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 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 to a cross screwdriver for screwing.

[0039] In order to further optimize the above technical solution, the other end of the damper 11 and the buffer spring 10 is fixedly connected to a connecting plate 5, and the connecting plate 5 is rotatably connected to 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. The rotational connection of 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.

[0040] In order to further optimize the above technical solution, a supporting plate 29 and a sealing plate 32 are fixedly connected to the inner surface of the device body 9, and a heating chamber 30 is formed between the supporting plate 29 and the sealing plate 32, and the sealing plate 32 is located below the supporting plate 29. The device body 9 is provided with a jet outlet 31 passing through one side of the connecting seat, and the jet outlet 31 is connected to the heating chamber 30 for ejecting the gas in the heating chamber 30 toward the fixing bolt 14.

[0041] 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 air toward the fixing bolt 14 when the fan assembly is started.

[0042] 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 tube 25 connected to the heating chamber 30. The inner wall of the fan tube 25 is provided with a fan assembly. 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 outlet 31.

[0043] Specifically, the heating plate 33 is located inside the heating chamber 30, and the fan tube 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.

[0044] It should be noted that the fan assembly includes 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, and the external air is drawn into the heating chamber 30. The bracket 24 is fixedly connected to the inner wall of the fan pipe 25, and the upper surface of the supporting plate 29 is provided with a protective plate 27 for protecting the fan assembly.

[0045] Specifically, the upper surface of the supporting plate 29 is fixedly connected with a support rod 26, and 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.

[0046] 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.

[0047] It should be noted that there can be two groups of the supporting plate 29 and the sealing plate 32 as well as the heating chamber 30 formed by the two, which are symmetrically arranged on the upper and lower surfaces of 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.

[0048] The method for using the connection device of the high-strength steel structure node of the present invention is as follows:

[0049] During installation, insert the steel structure body 4 into the gap between the connecting seat 2 and the inner block 3. After insertion, insert the fixing bolt 14 into the threaded hole 1, and screw the fixing bolt 14 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. Use a cross screwdriver to screw the ejector rod 8 to screw it inward and contact the slider 19. Under the action of the inclined surface 22, the free end of the slider 19 will be ejected. After ejection, screw the fixing bolt 14 outward until the free end of the slider 19 presses against the inner surface of the inner block 3 from the inside out, forming a stable mechanical locking structure. Subsequently, use a cross screwdriver to screw the sleeve 13 to drive the buffer spring The spring 10 and the damper 11 move inward, causing the turntable 15 to contact 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. Then, the top rod 8 is twisted outward with a cross screwdriver. After the top rod 8 is screwed out, the slider 19 is pulled inward back to its original position by the reset spring 20. Then, the fixing bolt 14 is unscrewed and the steel structure body 4 is removed from the connecting seat 2.

[0050] The above description of the disclosed embodiments is intended to enable one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily 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 is not limited to the embodiments shown herein but is intended to conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A connection device for high-strength steel structure nodes, characterized in that: The invention comprises a device body (9) and a connecting seat (2) provided 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 provided 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; The positioning mechanism comprises a plurality of threaded holes (1) provided on the side surfaces of the adjacent device bodies (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 body (4) and the inner 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 fixed to the outer end of the fixing bolt (14); The interior of the fixing bolt (14) is provided with a threaded barrel (18) arranged along the axial direction thereof, a push rod (8) is screwed into the threaded barrel (18), a sliding groove (17) is provided on the side wall of the inner end of the fixing bolt (14), a slider (19) is provided in the sliding groove (17), an inner end of the slider (19) is movably connected to the sliding groove (17), and a slope (22) is provided on the contact surface of the push rod (8) and the slider (19), and when the push rod (8) is screwed inward, the push rod (8) pushes the free end of the slider (19) out of the sliding groove (17); The slide groove (17) is provided with a placement groove (16), and the side surface of the inner end of the slider (19) is fixedly connected to a connecting plate (21), and the connecting plate (21) is movably connected to the placement groove (16). 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 placement 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; 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 relatively fix the fixing bolt (14) and the threaded hole (1) through a reaction force.

2. The connection device of high-strength steel structure node according to claim 1, characterized in that: The other end of the damper (11) and the buffer spring (10) is fixedly connected to a connecting plate (5), and a side of the connecting plate (5) close to the connecting seat (2) is rotatably connected to a turntable (15), and the turntable (15) is movably abutted against the side surface of the connecting seat (2). The rotatable 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 the turntable (15) rotates.

3. The connection device of high-strength steel structure node according to claim 1, characterized in that: The inner surface of the device body (9) is fixedly connected to a carrier plate (29) and a sealing plate (32), a heating chamber (30) is formed between the carrier plate (29) and the sealing plate (32), and the sealing plate (32) is located below the carrier plate (29). The device body (9) is provided with a connecting seat on one side thereof and a through-hole jet port (31), the jet port (31) being in communication with the heating chamber (30) and being used for ejecting the gas in the heating chamber (30) toward the fixing bolt (14).

4. The connection device of high-strength steel structure node according to claim 3, 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) communicating with the heating chamber (30), and the inner wall of the fan pipe (25) is provided with a fan assembly, which 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 injection port (31).

5. The connection device of high-strength steel structure node according to claim 4, characterized in that: The fan assembly includes 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). The upper surface of the bearing plate (29) is provided with a guard plate (27) for protecting the fan assembly.

6. A method for using the connection device of a high-strength steel structure node according to any one of claims 1 to 5, 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 inward 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 slider (19) is screwed inward. The free end of the spring (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), 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 so that the fixing bolt (14) will not loosen; During disassembly, the sleeve (13) is twisted outwards by a cross screwdriver to loosen the buffer spring (10) and the damper (11). Subsequently, the top rod (8) is twisted outwards by a cross screwdriver. After the top rod (8) is screwed outwards, the slider (19) is pulled inwards back to its original position by the return spring (20). Subsequently, the fixing bolt (14) is twisted out to remove the steel structure body (4) from the connecting seat (2).

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