Connecting device and connecting process for steel structure and building outer wall

Abstract

The invention relates to the field of steel structure buildings, and discloses a steel structure and building outer wall connecting device which comprises a fixing assembly and a connecting assembly, a fixing hole is formed in the building outer wall, the fixing assembly is used for being connected with the fixing hole, the fixing assembly can be detached for secondary utilization, and the connecting assembly is used for being assembled on the fixing assembly. The fixing assembly comprises an expansion pipe, the two ends of the expansion pipe are named as the tail end and the head end respectively, a plurality of notches are formed in the tail end of the expansion pipe in a penetrating mode in the radial direction, the notches are arranged in the circumferential direction of the expansion pipe in an array mode, and the part, located between every two adjacent notches, of the tail end of the expansion pipe is named as an expansion section. The inner wall of the expansion section extends towards the axis of the expansion pipe to form a protrusion, the side, facing the axis of the expansion pipe, of the protrusion is in a cambered surface shape, and the distance between the cambered surface of the protrusion and the axis of the expansion pipe is gradually decreased in the axis direction of the expansion pipe from the head end to the tail end of the expansion pipe.

Description

Technical Field

[0001] The invention relates to the field of steel structure buildings, and in particular to a connecting device and a connecting process between a steel structure and an exterior wall of a building. Background Art

[0002] Steel structure building is an emerging building system. In construction projects, it is necessary to use a connecting structure to connect the steel structure and the concrete exterior wall. In the prior art, the common connection method is bolt connection, and expansion bolts are generally preferred. The use process of expansion bolts is as follows: refer to the attached Figure 1 and Figure 2 The expansion bolt includes an expansion tube a, a bolt b, a cone head c, a nut d, a flat washer e, etc. When in use, the expansion tube a is inserted into the hole on the outer wall of the building, and then the bolt b is pulled outward through the nut d, and the cone head c is pulled into the expansion tube a. Several openings are provided at the tail of the expansion tube a, so that the expansion tube a can be expanded and firmly stuck to the hole wall.

[0003] When in use, the expansion bolt has some shortcomings, for example: since the cone head c is pulled outward by the bolt b to expand the tail of the expansion tube a, the expansion tube is very likely to move outward a certain distance during the pulling process, resulting in a blank area between the end of the expansion tube and the bottom of the hole and the axial length of the blank area is uncontrollable, that is, a part of the hole drilled in the building exterior wall is not used in actual use, which is equivalent to the bolt not being fully inserted into the hole, which not only affects the overall strength, but also causes the part of the expansion bolt protruding from the hole to be too long, which is not beautiful and is easily bumped when pedestrians pass by; the expansion bolt is a disposable tool, cannot be reused, and is very difficult to disassemble.

[0004] Based on the above, some prior arts were found after searching, and they are introduced one by one: A Chinese invention patent with application publication number CN107401544A discloses an expansion bolt. According to its method of use, it is still necessary to knock the screw rod, chisel open the cavity wall on the front side of the expansion tube, use a screwdriver, take the wall or the ground as a fulcrum, and use the lever principle to pull it out. The difficulty of disassembly is still very high and needs to be improved. In addition, the problem of the blank area between the end of the expansion tube and the bottom of the hole has not been solved.

[0005] The Chinese invention patent with authorization announcement number CN111271356B discloses a reverse expansion bolt, which solves the problem of damage to the workpiece during secondary tightening, but still does not solve the problem that the expansion bolt is a disposable tool and is difficult to disassemble, as well as the problem of the blank area between the end of the expansion tube and the bottom of the hole when in use.

[0006] A Chinese invention patent with application publication number CN116428251A discloses a detachable expansion bolt. According to the description of its installation process, it is known that: the rod tail of the screw rod is moved by rotating the second nut, and the tank wall of the expansion end is gradually expanded outward, and squeezed against the hole wall of the installation hole to achieve installation and fixation; according to the description of its disassembly process, it is known that: the second nut is first rotated to make the rod tail of the screw rod leave the expansion end, and then the first nut is rotated to move the sleeve outward; it can be seen that it is only based on the existing expansion bolt technology, adding a first nut that can pull the expansion tube outward, and the difficulty of disassembling the expansion bolt is not reduced.

[0007] Based on the above, the present invention proposes a connection device and a connection process for a steel structure and an exterior wall of a building. Summary of the invention

[0008] In order to solve the problems mentioned in the above background, the present invention provides a connection device and a connection process for a steel structure and an exterior wall of a building.

[0009] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows.

[0010] A connecting device between a steel structure and an exterior wall of a building, comprising a fixing assembly and a connecting assembly, wherein a fixing hole is provided on the exterior wall of the building, the fixing assembly is used to connect with the fixing hole, and the fixing assembly can be removed for secondary use, and the connecting assembly is used to be assembled on the fixing assembly and used to connect with the steel structure; The fixing component includes an expansion tube, the two ends of which are respectively named as the tail end and the head end. The tail end of the expansion tube is provided with a cutout in the radial direction and a plurality of cutouts are arranged in an array along the circumferential direction of the expansion tube. The portion of the tail end of the expansion tube between two adjacent cutouts is named as an expansion section. A protrusion is extended on the inner wall of the expansion section toward the axial centerline of the expansion tube. The side of the protrusion facing the axial centerline of the expansion tube is provided with an arc shape. The distance between the arc surface of the protrusion and the axial centerline of the expansion tube decreases along the axial centerline of the expansion tube and in the direction from the head end of the expansion tube to the tail end.

[0011] Furthermore, there is a cone head between several expansion sections, and a frustum is provided at one end of the cone head toward the tail end of the expansion tube. The outer diameter of the frustum decreases along the axis of the expansion tube and from the head end to the tail end of the expansion tube. The frustum can fit with the raised arc surface.

[0012] Furthermore, a threaded shaft in the shape of a hollow shaft is coaxially installed in the expansion tube, a connecting rod is coaxially extended from one end of the cone head toward the head end of the expansion tube, the end of the connecting rod extends into the threaded shaft and the two form a threaded connection, and a sliding connection is formed between the connecting rod and the expansion tube.

[0013] Furthermore, the end of the threaded shaft extends out of the expansion tube and is provided with an inner hexagonal hole.

[0014] Furthermore, a cylindrical slider is coaxially arranged at the end of the connecting rod, and a convex strip is arranged on the outer circumferential surface of the slider. The convex strip and the slide groove arranged on the inner wall of the expansion tube form a sliding guide, and the guiding direction of the slide groove is parallel to the axial centerline direction of the expansion tube.

[0015] Furthermore, a locking member is provided between the threaded shaft and the expansion tube for limiting the rotation of the threaded shaft after the rear end of the expansion tube is expanded.

[0016] Further, the end face of the head end of the expansion tube is coaxially provided with an annular groove, the locking member comprises a threaded sleeve threadedly provided in the annular groove and a collar coaxially provided in the annular groove, the collar is provided on the side of the threaded sleeve facing the tail end of the expansion tube, the side of the annular groove facing the tail end of the expansion tube is provided in a frustum shape, and the distance between the frustum of the annular groove and the axis of the expansion tube decreases along the direction of the axis of the expansion tube and from the head end of the expansion tube to the tail end; A locking claw is arranged on one side of the ring facing the tail end of the expansion tube, and an arc surface is arranged on the side of the locking claw away from the axis of the ring. The arc surface of the locking claw can fit with the frustum surface of the ring groove, and a plurality of locking claws are arranged in an array along the circumferential direction of the ring.

[0017] Furthermore, a hexagonal head is extended from one side of the threaded sleeve away from the rear end of the expansion tube, and an avoidance groove surrounding the outer periphery of the hexagonal head is arranged on the end face of the head end of the expansion tube.

[0018] A connection process of a connection device between a steel structure and a building exterior wall: Step 1: Insert the expansion tube into the fixing hole on the exterior wall of the building, and make the tail end of the expansion tube contact the bottom of the fixing hole. Screw the threaded shaft to expand the tail end of the expansion tube through the cone head to achieve expansion connection between the expansion tube and the fixing hole. Step 2: Twist the threaded sleeve so that the locking claw holds the threaded shaft and locks the threaded shaft; Step 3: The connecting components include an inner pad, an outer lock seat, nuts, screws and a connecting bracket; The inner pad is provided with a threaded hole, the inner pad is threadedly mounted on the threaded shaft and the inner pad is fitted with the outer wall of the building; Step 4: A sleeve hole is provided on the outer lock seat, and convex plates are extended on both sides of the inner pad along the width direction; The connecting bracket is fitted with the inner pad and the side of the connecting bracket is in contact with the convex plate, the outer lock seat is sleeved on the threaded shaft, and the screw hole provided on the outer lock seat is coaxially aligned with the screw hole provided on the inner pad; Preliminarily screw the nut onto the threaded shaft, adjust the upper end height of the connecting bracket to a preset height, and then tighten the nut to achieve preliminary fixation of the outer lock seat, the connecting bracket and the inner pad; Step 5: Drill a screw hole on the connecting bracket, and align the screw hole on the connecting bracket, the screw hole on the outer lock seat, and the screw hole on the inner pad coaxially; Step 6: Install the screws between the three screw holes to achieve secondary fixation of the outer lock seat, the connecting bracket and the inner pad; Step 7: A bolt hole 1 is provided on the upper surface of the connecting bracket, and a bolt hole 2 corresponding to the bolt hole 1 is provided on the steel structure, and a fixed connection between the steel structure and the connecting bracket is achieved through bolts.

[0019] Compared with the prior art, the present invention has the following beneficial effects: This solution realizes the connection between the steel structure and the building exterior wall through the cooperation of fixing components and connecting components: 1. When the fixing assembly in this scheme is used, first insert the expansion tube into the fixing hole on the outer wall of the building and make the tail end of the expansion tube contact the bottom of the fixing hole, then screw the threaded shaft to expand the tail end of the expansion tube to achieve the expansion connection between the expansion tube and the fixing hole, then screw the threaded sleeve to make the locking claw hold the threaded shaft to lock the threaded shaft, so: 1. Since the threaded sleeve is entirely located in the expansion tube, after the threaded shaft is locked by the locking member, it is difficult to screw the threaded sleeve unless a tool such as a hexagonal wrench is used. Therefore, the expansion connection between the fixing component and the fixing hole of this solution is relatively stable; 2. In this solution, the cone head moves toward the tail end of the expansion tube to expand the tail end of the expansion tube. Therefore, compared with the existing expansion bolt technology, there is no problem of "there is a blank area between the end of the expansion tube and the bottom of the hole and the axial length of the blank area is uncontrollable, that is, a part of the hole punched in the building exterior wall is not used in actual use, which is equivalent to the bolt not being fully inserted into the hole, which not only affects the overall strength, but also causes the part of the expansion bolt protruding from the hole to be too long, which is not beautiful and is easy to be bumped when pedestrians pass by"; 3. In this solution, you can actively use tools such as an inner hexagon wrench to screw the threaded sleeve and cancel the lock on the threaded shaft. Then, use tools such as an inner hexagon wrench to screw the threaded shaft, and then pull out the fixing component with a little force to achieve disassembly of the fixing component. The disassembly is simple and the fixing component is not affected too much, so it can be used again.

[0020] 2. During the use of the connection components in this solution: 1. Through the cooperation of nuts and screws, the outer lock seat, connecting bracket and inner pad are fixed twice, so the stability is better; 2. The upper end height of the connecting bracket is adjustable. The bolt holes on the connecting bracket for connecting to the steel structure are arranged at the upper end of the connecting bracket with the axis vertical. Therefore, even if there is a slight error in the position of the fixing hole on the exterior wall of the building, the upper end height of the connecting bracket can be adjusted during the subsequent use of the connecting assembly to overcome the error, so that the fixed connection between the steel structure and the connecting bracket is not affected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 For the prior art Figure 1 ; Figure 2 For the prior art Figure 2 ; Figure 3 It is a structural schematic diagram of the present invention; Figure 4 It is a schematic diagram of the fixing components and the connecting components; Figure 5 An exploded view of the connection components; Figure 6 Instructions for fixing components Figure 1 ; Figure 7 Instructions for fixing components Figure 2 ; Figure 8 is a cross-sectional view of a fixed component; Fig. 9 An exploded view of the fixed assembly; Fig.10 A cross-sectional view of the locking member.

[0022] The reference numerals in the accompanying drawings are: 100, fixing assembly; 101, expansion tube; 102, incision; 103, threaded shaft; 104, connecting rod; 105, cone head; 106, locking piece; 1061, collar; 1062, locking claw; 1063, threaded sleeve; 200, connecting assembly; 201, inner pad; 202, outer locking seat; 203, nut; 204, washer; 205, screw; 206, connecting bracket; 207, cap. DETAILED DESCRIPTION

[0023] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation mode, structure, characteristics and effects of the present invention are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0024] This plan is attached Figure 3 In the figure, f refers to the building exterior wall.

[0025] Reference Figure 1-Figure 10 , a connecting device between a steel structure and an exterior wall of a building, comprising a fixing assembly 100 and a connecting assembly 200, wherein: A fixing hole is provided on the outer wall of the building, and the fixing assembly 100 is used to form a connection with the fixing hole, and the connection method adopts an expansion bolt method, and the fixing assembly 100 can be removed for secondary use; The connecting component 200 is used to be assembled on the fixing component 100 and to form a connection with the steel structure. When in use, due to factors such as measurement errors or drilling errors, the fixing holes drilled on the exterior wall of the building may have position deviations. If the deviation is in the horizontal direction, then since the bolt holes set on the steel structure and the connecting component 200 generally have a margin, as long as the deviation is not large, bolt fixing can be achieved. However, if the deviation is in the vertical direction, then after the bolt fixing is completed, there will be a situation where there is no contact between the steel structure and the connecting component 200. In this case, the bolt fixing is not strong enough. Therefore, it is necessary to re-drill the holes and the position of the re-drilled holes is easily affected by the previously discarded fixing holes. In this solution, the connecting component 200 is improved to address this problem, which can solve this problem. See the detailed description below.

[0026] It should be noted that, in this solution, the steel structure is located above the connecting assembly 200 and is bolted to the connecting assembly 200, that is, the axis lines of the bolt holes provided on the steel structure and the connecting assembly 200 are arranged vertically.

[0027] 1. Fixing assembly 100: Reference Figure 6-Figure 10 The fixing assembly 100 includes an expansion tube 101, the two ends of which are named as the tail end and the head end respectively. The tail end of the expansion tube 101 is radially penetrated with a notch 102, and a plurality of notches 102 are arrayed along the circumferential direction of the expansion tube 101. The expansion tube 101 itself is made of metal material. If there is a force exerted to expand outward inside the tail end, the tail end of the expansion tube 101 will expand accordingly, which is consistent with the principle of existing expansion bolts and will not be elaborated.

[0028] A threaded shaft 103 in the shape of a hollow shaft is coaxially rotatably installed in the expansion tube 101 .

[0029] The portion of the tail end of the expansion tube 101 between two adjacent incisions 102 is named the expansion section. The inner wall of the expansion section has a protrusion extending toward the axial direction of the expansion tube 101. The side of the protrusion facing the axial direction of the expansion tube 101 is set to an arc shape. The distance between the arc surface of the protrusion and the axial direction of the expansion tube 101 decreases along the axial direction of the expansion tube 101 and from the head end to the tail end of the expansion tube 101.

[0030] There is a cone head 105 between several expansion sections. A frustum is provided at one end of the cone head 105 facing the tail end of the expansion tube 101. The outer diameter of the frustum decreases along the axis of the expansion tube 101 and from the head end to the tail end of the expansion tube 101. The frustum of the cone head 105 can fit with the raised arc surface.

[0031] A connecting rod 104 is coaxially extended from one end of the cone head 105 toward the head end of the expansion tube 101. The end of the connecting rod 104 extends into the threaded shaft 103 and the two are threadedly connected. The connecting rod 104 and the expansion tube 101 are slidably connected. Furthermore, a cylindrical slider is coaxially arranged at the end of the connecting rod 104. The outer circumferential surface of the slider is provided with a convex strip. The convex strip and the slide groove arranged on the inner wall of the expansion tube 101 form a sliding guide. The guiding direction of the slide groove is parallel to the axial centerline direction of the expansion tube 101. Therefore, When the threaded shaft 103 is screwed, the connecting rod 104 can be driven to move along the axial direction, and the connecting rod 104 moves with the cone head 105. When the cone head 105 is close to the rear end of the expansion tube 101, the rear end of the expansion tube 101 can be expanded through the mutual cooperation of the frustum surface set on the cone head 105 and the arc surface set on the protrusion. On the contrary, when the cone head 105 is away from the rear end of the expansion tube 101, the drive for expanding the rear end of the expansion tube 101 will be cancelled. At this time, the expansion tube 101 can be pulled out with a little force.

[0032] Preferably, the end of the threaded shaft 103 extends out of the expansion tube 101 and is provided with an inner hexagonal hole, so that the staff can screw the threaded shaft 103 using existing tools such as an inner hexagonal wrench.

[0033] Furthermore, a locking member 106 is provided between the threaded shaft 103 and the expansion tube 101 to limit the rotation of the threaded shaft 103 after the rear end of the expansion tube 101 is expanded.

[0034] Specifically, a ring groove is coaxially arranged on the end face of the head end of the expansion tube 101, and the locking member 106 includes a threaded sleeve 1063 threadedly arranged in the ring groove and a collar 1061 coaxially located in the ring groove, wherein the threaded sleeve 1063 and the collar 1061 are both in the shape of annular rings, and do not affect the end of the threaded shaft 103 extending out of the expansion tube 101.

[0035] The ring 1061 is located on the side of the threaded sleeve 1063 facing the tail end of the expansion tube 101, and the side of the ring groove facing the tail end of the expansion tube 101 is set to a frustum shape. The distance between the frustum and the axis of the expansion tube 101 decreases along the axis of the expansion tube 101 and from the head end to the tail end of the expansion tube 101.

[0036] A locking claw 1062 is provided on one side of the collar 1061 facing the rear end of the expansion tube 101 , and an arc surface is provided on the side of the locking claw 1062 away from the axis of the collar 1061 , and the arc surface can fit with the frustum surface of the ring groove.

[0037] A plurality of locking claws 1062 are arranged in an array along the circumferential direction of the collar 1061 , and the locking claws 1062 are made of elastic material.

[0038] When the threaded sleeve 1063 is screwed, the ring 1061 can be pushed to move closer to the tail end of the expansion tube 101. The arc surface set on the locking claw 1062 and the frustum set on the ring groove cooperate with each other, so that the locking claw 1062 can be driven to move closer to the threaded shaft 103. Therefore, with the cooperation of several locking claws 1062, the threaded shaft 103 is firmly held and a rotational obstacle is imposed on the threaded shaft 103. Conversely, by screwing the threaded sleeve 1063 in the opposite direction, the locking claw 1062 can remove the restriction on the threaded shaft 103.

[0039] Preferably, a hexagonal head is extended from one side of the threaded sleeve 1063 away from the rear end of the expansion tube 101, and a relief groove is provided on the head end face of the expansion tube 101, so that the staff can screw the threaded sleeve 1063 with existing tools such as hexagonal wrenches.

[0040] The working process of the fixing assembly 100 is specifically as follows: First, the expansion tube 101 is inserted into the fixing hole on the exterior wall of the building, and the tail end of the expansion tube 101 contacts the bottom of the fixing hole; Then, the threaded shaft 103 is screwed to expand the tail end of the expansion tube 101, thereby achieving expansion connection between the expansion tube 101 and the fixing hole; Then, the threaded sleeve 1063 is screwed to make the locking claw 1062 hold the threaded shaft 103 and lock the threaded shaft 103. At this time, the fixing assembly 100 is connected to the fixing hole and has the following advantages: 1. Since the threaded sleeve 1063 is entirely located inside the expansion tube 101, after the threaded shaft 103 is locked by the locking member 106, it is difficult to screw the threaded sleeve 1063 unless a tool such as a hexagonal wrench is used. Therefore, the expansion connection between the fixing assembly 100 and the fixing hole of the present solution is relatively stable; 2. In this solution, the cone head 105 moves toward the rear end of the expansion tube 101 to expand the rear end of the expansion tube 101. Therefore, compared with the existing expansion bolt technology, there is no problem of "there is a blank area between the end of the expansion tube and the bottom of the hole and the axial length of the blank area is uncontrollable, that is, a part of the hole punched in the building exterior wall is not used in actual use, which is equivalent to the bolt not being fully inserted into the hole, which not only affects the overall strength, but also causes the part of the expansion bolt protruding from the hole to be too long, which is not beautiful and is easy to be bumped when pedestrians pass by"; 3. In this solution, the threaded sleeve 1063 can be screwed with the help of a tool such as an inner hexagon wrench to cancel the lock on the threaded shaft 103. Then, the threaded shaft 103 can be screwed with the help of a tool such as an inner hexagon wrench. Then, the fixing component 100 can be pulled outward with a little force to achieve the disassembly of the fixing component 100. The disassembly is simple and the fixing component 100 is not affected too much, so it can be used a second time.

[0041] 2. Connecting component 200: Reference Figure 4 and Figure 5 The connecting assembly 200 includes an inner pad 201 , an outer locking seat 202 , a nut 203 , a screw 205 and a connecting bracket 206 .

[0042] The use process of the connection component 200 is specifically as follows: When the fixing assembly 100 is connected to the fixing hole on the building's exterior wall, the end of the threaded shaft 103 will extend out of the fixing hole, and the expansion tube 101 will be located entirely in the fixing hole; Then, a threaded hole is provided on the inner pad 201, and the inner pad 201 is threadedly mounted on the threaded shaft 103 and the inner pad 201 is fitted to the outer wall of the building; Then, a sleeve hole is provided on the outer lock seat 202, and convex plates are extended on both sides of the inner pad 201 along the width direction, and the connecting bracket 206 is fitted with the inner pad 201 and the side edge of the connecting bracket 206 is in contact with the convex plate; The outer lock seat 202 is sleeved on the threaded shaft 103, and the screw hole provided on the outer lock seat 202 is coaxially aligned with the screw hole provided on the inner pad 201; Screw the nut 203 onto the threaded shaft 103 to achieve the initial fixation of the outer lock seat 202, the connecting bracket 206 and the inner pad 201. It should be noted that the nut 203 does not need to be tightened too much at the beginning. The position of the outer lock seat 202 can be slightly adjusted, and the upper end height of the connecting bracket 206 can be adjusted until the two screw holes are aligned and the upper end height of the connecting bracket 206 is at a preset height, and then screw the nut 203; Then, a screw hole is punched on the connecting bracket 206 by the prior art, and the screw hole on the connecting bracket 206, the screw hole on the outer lock seat 202 and the screw hole on the inner pad 201 are coaxially aligned; Then, install the screws 205 between the three screw holes to achieve secondary fixation of the outer lock base 202, the connecting bracket 206 and the inner pad 201; Then, a bolt hole 1 is provided on the upper surface of the connecting bracket 206, and a bolt hole 2 corresponding to and matching the bolt hole 1 is provided on the steel structure, so that a fixed connection between the steel structure and the connecting bracket 206 is achieved through existing bolt technology.

[0043] It can be seen from the above description that the connection assembly 200 of this solution has the following advantages: 1. Through the cooperation of the nut 203 and the screw 205, the outer lock seat 202, the connecting bracket 206 and the inner pad 201 are fixed twice, so the stability is better; 2. The upper end height of the connecting bracket 206 is adjustable. The bolt holes on the connecting bracket 206 for connecting to the steel structure are arranged at the upper end of the connecting bracket 206 with the axis vertical. Therefore, even if there is a slight error in the position of the fixing hole on the exterior wall of the building, the upper end height of the connecting bracket 206 can be adjusted during the subsequent use of the connecting assembly 200 to overcome the error, so that the fixed connection between the steel structure and the connecting bracket 206 is not affected.

[0044] Preferably, in this solution, only two screw holes are shown on the outer lock seat 202 and the inner pad 201, which can be adjusted accordingly according to the specific situation, and no further description is given. In addition, considering the stability of the connection between the outer lock seat 202 and the inner pad 201, more screw holes can be set on both sides of the threaded shaft 103, but there is a blank area between the multiple screw holes because there is no connecting bracket 206, so refer to Figure 5 A washer 204 can be inserted between the outer lock seat 202 and the inner pad 201, and then fixed with screws.

[0045] Preferably, a cap 207 may be threadedly installed at the end of the threaded shaft 103, and the outer circumferential surface of the cap 207 may be set to a hemispherical shape to avoid bumping into pedestrians; Preferably, friction lines are respectively provided on the sides of the outer locking seat 202 and the inner pad 201 facing each other, so as to further improve the connection stability among the outer locking seat 202 , the connecting bracket 206 and the inner pad 201 .

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A connection device for a steel structure and an exterior wall of a building, comprising a fixing component (100) and a connection component (200), characterized in that: A fixing hole is provided on the exterior wall of the building, the fixing assembly (100) is used to form a connection with the fixing hole, and the fixing assembly (100) can be removed for secondary use, and the connecting assembly (200) is used to be assembled on the fixing assembly (100) and used to form a connection with the steel structure; The fixing assembly (100) comprises an expansion tube (101), the two ends of the expansion tube (101) are respectively named as the tail end and the head end, the tail end of the expansion tube (101) is provided with a notch (102) penetrating in the radial direction, and a plurality of the notches (102) are arranged in an array along the circumferential direction of the expansion tube (101), the portion of the tail end of the expansion tube (101) between two adjacent notches (102) is named as an expansion section, the inner wall of the expansion section is provided with a protrusion extending in the direction of the axis of the expansion tube (101), the side of the protrusion facing the axis of the expansion tube (101) is arranged in an arc shape, and the distance between the arc surface of the protrusion and the axis of the expansion tube (101) decreases along the direction of the axis of the expansion tube (101) and from the head end to the tail end of the expansion tube (101).

2. The device for connecting a steel structure to an exterior wall of a building according to claim 1, characterized in that: A cone head (105) is provided between the plurality of expansion sections. A frustum is provided at one end of the cone head (105) facing the rear end of the expansion tube (101). The outer diameter of the frustum of the cone head (105) decreases along the axis of the expansion tube (101) and in a direction from the front end to the rear end of the expansion tube (101). The frustum of the cone head (105) can fit with the convex arc surface.

3. The device for connecting a steel structure to an exterior wall of a building according to claim 2, characterized in that: A threaded shaft (103) in the shape of a hollow shaft is coaxially rotatably installed in the expansion tube (101), a connecting rod (104) coaxially extends from one end of the cone head (105) toward the head end of the expansion tube (101), the end of the connecting rod (104) extends into the threaded shaft (103) and the two are threadedly connected, and a sliding connection is formed between the connecting rod (104) and the expansion tube (101).

4. The device for connecting a steel structure to an exterior wall of a building according to claim 3, characterized in that: The end of the threaded shaft (103) extends out of the expansion tube (101) and is provided with a hexagonal inner hole.

5. The device for connecting a steel structure to an exterior wall of a building according to claim 3, characterized in that: A cylindrical slider is coaxially arranged at the end of the connecting rod (104), and a convex strip is arranged on the outer circumferential surface of the slider. The convex strip and the slide groove arranged on the inner wall of the expansion tube (101) form a sliding guide, and the guiding direction of the slide groove is parallel to the axial centerline direction of the expansion tube (101).

6. The device for connecting a steel structure to an exterior wall of a building according to claim 3, characterized in that: A locking member (106) is provided between the threaded shaft (103) and the expansion tube (101) for limiting the rotation of the threaded shaft (103) after the rear end of the expansion tube (101) is expanded.

7. The device for connecting a steel structure to an exterior wall of a building according to claim 6, characterized in that: The end surface of the head end of the expansion tube (101) is coaxially provided with an annular groove, the locking member (106) comprises a threaded sleeve (1063) threadedly arranged in the annular groove and a collar (1061) coaxially arranged in the annular groove, the collar (1061) being located on a side of the threaded sleeve (1063) facing the tail end of the expansion tube (101), the side of the annular groove facing the tail end of the expansion tube (101) being arranged in a frustum shape, and the distance between the frustum of the annular groove and the axis of the expansion tube (101) decreases along the direction of the axis of the expansion tube (101) and in a direction from the head end to the tail end of the expansion tube (101); A locking claw (1062) is arranged on one side of the collar (1061) facing the rear end of the expansion tube (101), and an arc surface is arranged on the side of the locking claw (1062) away from the axis of the collar (1061). The arc surface of the locking claw (1062) can fit with the frustum surface of the annular groove, and a plurality of locking claws (1062) are arranged in an array along the circumferential direction of the collar (1061).

8. The device for connecting a steel structure to an exterior wall of a building according to claim 7, characterized in that: A hexagonal head is extended from one side of the threaded sleeve (1063) away from the rear end of the expansion tube (101), and a relief groove surrounding the outer periphery of the hexagonal head is provided on the front end surface of the expansion tube (101).

9. The connection process of the connection device of a steel structure and a building exterior wall as claimed in claim 7, characterized in that: The steps include: Step 1: insert the expansion tube (101) into the fixing hole on the exterior wall of the building, with the tail end of the expansion tube (101) in contact with the bottom of the fixing hole, and screw the threaded shaft (103) to expand the tail end of the expansion tube (101) through the cone head (105), thereby achieving expansion connection between the expansion tube (101) and the fixing hole; Step 2: Screw the threaded sleeve (1063) so that the locking claw (1062) holds the threaded shaft (103) to lock the threaded shaft (103); Step 3: The connecting assembly (200) includes an inner pad (201), an outer locking seat (202), a nut (203), a screw (205) and a connecting bracket (206); A threaded hole is provided on the inner pad (201), the inner pad (201) is threadedly mounted on the threaded shaft (103), and the inner pad (201) is in contact with the outer wall of the building; Step 4: A sleeve hole is provided on the outer lock seat (202), and convex plates are extended on both sides of the inner pad (201) along the width direction; The connecting bracket (206) is fitted with the inner pad (201) and the side edge of the connecting bracket (206) is in contact with the convex plate, the outer locking seat (202) is sleeved on the threaded shaft (103), and the screw hole provided on the outer locking seat (202) is coaxially aligned with the screw hole provided on the inner pad (201); Preliminarily screwing the nut (203) onto the threaded shaft (103), adjusting the height of the upper end of the connecting bracket (206) to a preset height, and then tightening the nut (203) to achieve preliminary fixation of the outer locking seat (202), the connecting bracket (206) and the inner pad (201); Step 5: Drill a screw hole on the connecting bracket (206), and align the screw hole on the connecting bracket (206), the screw hole on the outer lock seat (202), and the screw hole on the inner pad (201) coaxially; Step 6: Install the screws (205) between the three screw holes to achieve secondary fixation of the outer lock seat (202), the connecting bracket (206) and the inner pad (201); Step 7: A bolt hole 1 is provided on the upper surface of the connecting bracket (206), and a bolt hole 2 corresponding to the bolt hole 1 is provided on the steel structure, and a fixed connection between the steel structure and the connecting bracket (206) is achieved by bolts.

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