A connecting device and connecting process for a steel structure and a building exterior wall

Abstract

The present invention relates to the field of steel structure buildings, and discloses a connecting device between a steel structure and a building exterior wall, including a fixing component and a connecting component. Fixing holes are provided on the building exterior wall. The fixing component is used to form a connection with the fixing holes, and the fixing component can be disassembled for secondary use. The connecting component is used to be assembled on the fixing component and used to form a connection with the steel structure. The fixing component includes an expansion tube. The two ends of the expansion tube are respectively named the tail end and the head end. A cut is provided through the expansion tube along the radial direction at the tail end of the expansion tube, and a plurality of cuts are arranged in an array along the circumferential direction of the expansion tube. The part of the expansion tube tail end located between two adjacent cuts is named the expansion section. A protrusion extends from the inner wall of the expansion section towards the axis of the expansion tube. The side of the protrusion facing the axis of the expansion tube is set in an arc shape. The distance between the arc surface of the protrusion and the axis of the expansion tube decreases along the axis of the expansion tube in the direction from the head end to the tail end of the expansion tube.

Description

Technical Field

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

[0002] Steel structure buildings are a new type of building system. In construction projects, a connecting structure is required to connect the steel structure and the concrete exterior wall. In the prior art, the common connecting method is bolt connection, and expansion bolts are generally preferably used. The using process of expansion bolts is as follows: Refer to the appendix 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 building exterior wall, and then the bolt b is pulled outwards through the nut d, and the cone head c is pulled into the expansion tube a. There are several openings at the tail of the expansion tube a, so that the expansion tube a can expand and firmly clamp with the hole wall.

[0003] When in use, there are some deficiencies in the expansion bolt. For example: Since the cone head c is pulled outwards by the bolt b to expand the tail of the expansion tube a, during the process of pulling outwards, the expansion tube is very likely to move outwards together by a certain distance, 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 that the bolt is not fully inserted into the hole, not only affecting the overall strength, but also causing the part of the expansion bolt extending out of the hole to be too long, which is not beautiful and pedestrians are easily bumped when passing by; the expansion bolt is a disposable tool and cannot be reused, and it is very difficult to disassemble during disassembly.

[0004] Based on the above, after retrieval, some prior arts are found and introduced one by one as follows:

[0005] The Chinese invention patent with the application publication number CN107401544A discloses an expansion bolt. According to its using method, it still needs to knock the screw rod, chisel the cavity wall in front of the expansion tube, and use a screwdriver with the wall or the ground as a fulcrum and use the lever principle to be able to pull out, and the disassembly difficulty 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.

[0006] The Chinese invention patent with the authorization announcement number CN111271356B discloses a reverse expansion bolt. Although it solves the problem of damage to the workpiece during secondary tightening, it still does not solve the problems that the expansion bolt is a disposable tool, the disassembly difficulty is relatively high, and the problem of the blank area between the end of the expansion tube and the bottom of the hole during use.

[0007] The Chinese invention patent with the publication number of CN116428251A discloses a detachable expansion bolt. According to the description of its installation process, it can be known that: by rotating the second nut, the tail of the screw rod moves, gradually expanding the wall of the expansion end outward and squeezing it against the wall of the installation hole to achieve installation and fixation; according to the description of its disassembly process, it can be known that: first, rotate the second nut to make the tail of the screw rod leave the expansion end, and then rotate the first nut to move the sleeve outward; thus, it can be seen that it only adds a first nut that can pull the expansion tube outward on the basis of the existing expansion bolt technology, and the disassembly difficulty of the expansion bolt has not been reduced.

[0008] Based on the above, the present invention proposes a connection device and connection process for a steel structure and a building exterior wall. Summary of the Invention

[0009] To solve the problems mentioned in the above background, the present invention provides a connection device and connection process for a steel structure and a building exterior wall.

[0010] To achieve the above technical objectives, the technical solutions adopted by the present invention are as follows.

[0011] A connection device for a steel structure and a building exterior wall includes a fixing component and a connecting component. There are fixing holes on the building exterior wall. The fixing component is used to form a connection with the fixing holes and can be disassembled for secondary use. The connecting component is used to be assembled on the fixing component and is used to form a connection with the steel structure;

[0012] The fixing component includes an expansion tube. The two ends of the expansion tube are respectively named the tail end and the head end. The tail end of the expansion tube is provided with cutouts along the radial direction, and several cutouts are arranged in an array along the circumferential direction of the expansion tube. The part of the tail end of the expansion tube between two adjacent cutouts is named the expansion section. There are protrusions extending from the inner wall of the expansion section towards the axis of the expansion tube. The side of the protrusion facing the axis of the expansion tube is set in an arc shape. The distance between the arc surface of the protrusion and the axis of the expansion tube decreases along the axis of the expansion tube in the direction from the head end to the tail end of the expansion tube.

[0013] Further, there is a cone head between several expansion sections. One end of the cone head facing the tail end of the expansion tube is provided with a round table surface. The outer diameter of the round table surface of the cone head decreases along the axis of the expansion tube in the direction from the head end to the tail end of the expansion tube. The round table surface of the cone head can be attached to the arc surface of the protrusion.

[0014] Further, a hollow shaft-shaped threaded shaft is coaxially and rotatably installed in the expansion tube. One end of the cone head facing the head end of the expansion tube extends coaxially with a connecting rod. The end of the connecting rod extends into the threaded shaft and the two form a threaded connection. A sliding connection is formed between the connecting rod and the expansion tube.

[0015] Further, the end of the threaded shaft extends out of the expansion tube and is provided with an internal hexagonal hole.

[0016] 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.

[0017] 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.

[0018] 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;

[0019] 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.

[0020] 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.

[0021] A connection process of a connection device between a steel structure and a building exterior wall:

[0022] 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.

[0023] Step 2: Twist the threaded sleeve so that the locking claw holds the threaded shaft and locks the threaded shaft;

[0024] Step 3: The connecting components include an inner pad, an outer lock seat, nuts, screws and a connecting bracket;

[0025] 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;

[0026] 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;

[0027] 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;

[0028] Initially screw the nut onto the threaded shaft, adjust the height of the upper end of the connecting bracket to a preset height, and then tighten the nut to achieve the preliminary fixation of the outer lock seat, the connecting bracket, and the inner backing plate;

[0029] Step Five: Drill a screw hole in the connecting bracket, and align the screw holes on the connecting bracket, the outer lock seat, and the inner backing plate coaxially;

[0030] Step Six: Install the screw between the three screw holes to achieve the secondary fixation of the outer lock seat, the connecting bracket, and the inner backing plate;

[0031] Step Seven: There is a first bolt hole on the upper surface of the connecting bracket, and there is a second bolt hole on the steel structure corresponding to and matching the first bolt hole. Fix the connection between the steel structure and the connecting bracket through bolts.

[0032] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0033] This solution realizes the connection between the steel structure and the building exterior wall through the cooperation of the fixing component and the connecting component:

[0034] First, when the fixing component in this solution is used, first insert the expansion tube into the fixing hole on the building exterior wall 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 claws hold the threaded shaft to lock the threaded shaft. Therefore:

[0035] 1. Since the threaded sleeve is entirely located inside the expansion tube, it is very difficult to screw the threaded sleeve unless tools such as an internal hexagonal wrench are used after locking the threaded shaft by the locking part. Therefore, the expansion connection between the fixing component of this solution and the fixing hole is relatively stable;

[0036] 2. In this solution, since the cone head moves towards the tail end of the expansion tube to expand the tail end of the expansion tube, compared with the existing expansion bolt technology, there is no problem that "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 drilled in the building exterior wall is not used during actual use, which is equivalent to the bolt not being fully inserted into the hole, not only affecting the overall strength, but also causing the part of the expansion bolt protruding from the hole to be too long, which is not beautiful and pedestrians are easily bumped when passing by";

[0037] 3. In this solution, tools such as an internal hexagonal wrench can be actively used to screw the threaded sleeve to cancel the locking of the threaded shaft. Then, with tools such as an internal hexagonal wrench, screw the threaded shaft, and then slightly exert force to pull out the fixing component outward to achieve the disassembly of the fixing component. The disassembly is simple and the fixing component is not affected too much and can be reused.

[0038] II. During the use of the connection component in this solution:

[0039] 1. Through the cooperation of the nut and the screw, the outer lock seat, the connection bracket, and the inner backing plate are fixed twice, so the stability is better;

[0040] 2. The height of the upper end of the connection bracket is adjustable. The bolt hole for connecting with the steel structure on the connection bracket is set at the upper end of the connection bracket and the axis is vertical. Therefore, even if there are some errors in the position of the fixing holes on the outer wall of the building, during the subsequent use of the connection component, the height of the upper end of the connection bracket can be adjusted to overcome the errors, so that the fixed connection between the steel structure and the connection bracket is not affected. Description of the Drawings

[0041] Figure 1 is a schematic diagram of the prior art Figure 1 ;

[0042] Figure 2 is a schematic diagram of the prior art Figure 2 ;

[0043] Figure 3 is a schematic structural diagram of the present invention;

[0044] Figure 4 is a schematic diagram of the fixing component and the connection component;

[0045] Figure 5 is an exploded view of the connection component;

[0046] Figure 6 is a schematic diagram of the fixing component Figure 1 ;

[0047] Figure 7 is a schematic diagram of the fixing component Figure 2 ;

[0048] Figure 8 is a cross-sectional view of the fixing component;

[0049] Figure 9 is an exploded view of the fixing component;

[0050] Figure 10 is a cross-sectional view of the locking member.

[0051] The reference numerals in the drawings are:

[0052] 100. Fixed component; 101. Expanding tube; 102. Notch; 103. Threaded shaft; 104. Connecting rod; 105. Tapered head; 106. Locking member; 1061. Collar; 1062. Locking claw; 1063. Threaded sleeve; 200. Connecting component; 201. Inner backing plate; 202. Outer lock seat; 203. Nut; 204. Washer; 205. Screw; 206. Connecting bracket; 207. Cap. Detailed implementation manner

[0053] To further elaborate on the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the following combines the drawings and preferred embodiments to detail the specific implementation manner, structure, features and their effects of the present invention as follows.

[0054] In this solution Figure 3 where f refers to the exterior wall of a building.

[0055] Referring to Figures 1 - 10 , a connecting device between a steel structure and the exterior wall of a building includes a fixed component 100 and a connecting component 200, wherein:

[0056] Fixing holes are provided on the exterior wall of the building. The fixed component 100 is used to form a connection with the fixing holes, and the connection method adopts the expansion bolt method, and the fixed component 100 can be disassembled for secondary use;

[0057] The connecting component 200 is used to be assembled on the fixed component 100 and is used to form a connection with the steel structure. During 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 it is a deviation in the horizontal direction, then since the bolt holes provided on the steel structure and the connecting component 200 generally have a margin, as long as the deviation is not large, bolt fixation can be achieved. However, if it is a deviation in the vertical direction, then after bolt fixation, there will be a situation where there is no contact between the steel structure and the connecting component 200. In this case, the bolt fixation is not firm 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, to solve this problem, the connecting component 200 is improved, and the specific solution will be elaborated later.

[0058] It should be noted that in this solution, the steel structure is located above the connecting component 200 and forms a bolt connection with the connecting component 200, that is, the axis lines of the bolt holes provided on the steel structure and the connecting component 200 are vertically arranged.

[0059] I. Fixed component 100:

[0060] Referring to Figures 6 - 10, the fixing component 100 includes an expansion tube 101. The two ends of the expansion tube 101 are respectively named the tail end and the head end. The tail end of the expansion tube 101 is provided with a notch 102 penetrating along the radial direction, and a plurality of notches 102 are arranged in an array along the circumferential direction of the expansion tube 101. The expansion tube 101 itself is made of a metal material. If there is an outward expanding force inside the tail end, then the tail end of the expansion tube 101 will expand correspondingly, which is the same as the principle of the existing expansion bolt and will not be elaborated here.

[0061] A threaded shaft 103 in the shape of a hollow shaft is coaxially and rotatably installed in the expansion tube 101.

[0062] The part of the tail end of the expansion tube 101 between two adjacent notches 102 is named the expansion section. The inner wall of the expansion section extends towards the axis of the expansion tube 101 with a protrusion. The side of the protrusion facing the axis of the expansion tube 101 is set in an arc shape. The distance between the arc surface of the protrusion and the axis of the expansion tube 101 decreases along the axis of the expansion tube 101 and in the direction from the head end to the tail end of the expansion tube 101.

[0063] There is a cone head 105 between several expansion sections. One end of the cone head 105 facing the tail end of the expansion tube 101 is provided with a round table surface. The outer diameter of the round table surface decreases along the axis of the expansion tube 101 and in the direction from the head end to the tail end of the expansion tube 101. The round table surface of the cone head 105 can fit with the arc surface of the protrusion.

[0064] One end of the cone head 105 facing the head end of the expansion tube 101 coaxially extends with a connecting rod 104. The end of the connecting rod 104 extends into the threaded shaft 103 and the two form a threaded connection. A sliding connection is formed between the connecting rod 104 and the expansion tube 101. Further, a slider in the shape of a cylinder is coaxially arranged at the end of the connecting rod 104. The outer circular surface of the slider is provided with a convex strip, and the convex strip forms a sliding guiding fit with a chute arranged on the inner wall of the expansion tube 101. The guiding direction of the chute is parallel to the axis direction of the expansion tube 101. Therefore, when the threaded shaft 103 is rotated, the connecting rod 104 can be driven to move along the axis direction. The connecting rod 104 drives the cone head 105 to move together. When the cone head 105 approaches the tail end of the expansion tube 101, through the mutual cooperation of the round table surface arranged on the cone head 105 and the arc surface arranged on the protrusion, the tail end of the expansion tube 101 can be expanded. On the contrary, when the cone head 105 moves away from the tail end of the expansion tube 101, the driving force for expanding the tail end of the expansion tube 101 will be cancelled. At this time, with a little force, the expansion tube 101 can be pulled outwards.

[0065] Preferably, the end of the threaded shaft 103 extends out of the expansion tube 101 and is provided with an internal hexagonal hole. Therefore, the staff can rotate the threaded shaft 103 through tools such as existing internal hexagonal wrenches.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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.

[0073] The working process of the fixing assembly 100 is specifically as follows:

[0074] 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;

[0075] 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;

[0076] Then, screw the threaded sleeve 1063 to make the locking claw 1062 hold the threaded shaft 103, locking the threaded shaft 103. At this time, the fixing component 100 completes the connection with the fixing hole, and there are the following advantages:

[0077] 1. Since the threaded sleeve 1063 is entirely located within the expansion tube 101, after locking the threaded shaft 103 with the locking member 106, it is very difficult to screw the threaded sleeve 1063 unless tools such as an internal hexagon wrench are used. Therefore, the expansion connection between the fixing component 100 of this solution and the fixing hole is relatively stable;

[0078] 2. In this solution, the tapered head 105 moves towards the end of the expansion tube 101 to expand the end of the expansion tube 101. Therefore, compared with the existing expansion bolt technology, there is no problem that "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, part of the hole drilled in the building exterior wall is not used during actual use, which is equivalent to the bolt not being fully inserted into the hole, not only affecting the overall strength, but also causing the part of the expansion bolt protruding from the hole to be too long, which is not aesthetically pleasing and pedestrians are easily bumped when passing by";

[0079] 3. In this solution, tools such as an internal hexagon wrench can be actively used to screw the threaded sleeve 1063 to cancel the locking of the threaded shaft 103. Then, with tools such as an internal hexagon wrench, screw the threaded shaft 103, and then gently pull out the fixing component 100 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 and can be reused.

[0080] II. Connection component 200:

[0081] Refer to Figure 4 and Figure 5 the connection component 200 includes an inner backing plate 201, an outer lock seat 202, a nut 203, a screw 205, and a connection bracket 206.

[0082] The usage process of the connection component 200 is specifically as follows:

[0083] When the fixing component 100 completes the connection with the fixing hole on the building exterior wall, the end of the threaded shaft 103 will protrude from the fixing hole, and the expansion tube 101 is entirely located within the fixing hole;

[0084] Then, the inner backing plate 201 is provided with a threaded hole, and the inner backing plate 201 is threadedly installed on the threaded shaft 103 and the inner backing plate 201 is in contact with the building exterior wall;

[0085] Then, the outer lock seat 202 is provided with a sleeve hole, convex plates extend from both sides of the inner backing plate 201 in the width direction, the connection bracket 206 is attached to the inner backing plate 201 and the side of the connection bracket 206 contacts the convex plate;

[0086] Sheath the outer lock seat 202 on the threaded shaft 103, and align the screw holes provided on the outer lock seat 202 coaxially with the screw holes provided on the inner backing plate 201;

[0087] Screw the nut 203 onto the threaded shaft 103 to achieve the preliminary fixation of the outer lock seat 202, the connecting bracket 206, and the inner backing plate 201. It should be noted that at the beginning, the nut 203 does not need to be screwed too tightly. 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 the preset height, and then the nut 203 is screwed;

[0088] Then, drill a screw hole on the connecting bracket 206 through the existing technology, 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 backing plate 201 are coaxially aligned;

[0089] Then, install the screw 205 between the three screw holes to achieve the secondary fixation of the outer lock seat 202, the connecting bracket 206, and the inner backing plate 201;

[0090] Then, there is a first bolt hole on the upper surface of the connecting bracket 206, and there is a second bolt hole on the steel structure that corresponds to and matches the first bolt hole. The fixed connection between the steel structure and the connecting bracket 206 is achieved through the existing bolt technology.

[0091] It can be seen from the above description that the connection assembly 200 of this solution has the following advantages:

[0092] 1. Through the cooperation of the nut 203 and the screw 205, the two-time fixation of the outer lock seat 202, the connecting bracket 206, and the inner backing plate 201 is achieved, so the stability is better;

[0093] 2. The upper end height of the connecting bracket 206 is adjustable. The first bolt hole for connecting with the steel structure on the connecting bracket 206 is provided at the upper end of the connecting bracket 206 and the axis is vertical. Therefore, even if there are some errors in the position of the fixing holes on the exterior wall of the building, during the subsequent use of the connection assembly 200, the upper end height of the connecting bracket 206 can be adjusted to overcome the errors, so that the fixed connection between the steel structure and the connecting bracket 206 is not affected.

[0094] Preferably, in this solution, only two screw holes on the outer lock seat 202 and the inner backing plate 201 are shown, and corresponding adjustments can be made according to specific situations, which will not be elaborated. In addition, considering the connection stability between the outer lock seat 202 and the inner backing plate 201, several screw holes can be provided on both of them and distributed on both sides of the threaded shaft 103. However, since there is no connecting bracket 206 between the additional screw holes, there are blank areas. Therefore, referring toFigure 5 , a washer 204 can be inserted between the outer lock seat 202 and the inner backing plate 201, and then screw fixation can be carried out.

[0095] Preferably, a cap 207 can be threadedly installed at the end of the threaded shaft 103, and the outer circumferential surface of the cap 207 can be set to a hemispherical shape to avoid bumping into pedestrians;

[0096] Preferably, friction patterns are respectively provided on the opposite sides of the outer lock seat 202 and the inner backing plate 201 facing each other to further improve the connection stability of the outer lock seat 202, the connecting bracket 206, and the inner backing plate 201.

[0097] The above are only the preferred embodiments of the present invention and do not impose any formal limitations on the present invention. Although the present invention has been disclosed above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some changes or modifications into equivalent embodiments by using the disclosed technical content within the scope of the technical solution of the present invention. However, as long as it does not depart from the content of the technical solution of the present invention, any brief modifications, equivalent changes, and modifications made to the above embodiments according to the technical essence of the present invention still fall within the scope of the technical solution of the present invention.

Claims

1. A connecting device for a steel structure and a building exterior wall, comprising a fixing component (100) and a connecting 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 a radial direction, and a plurality of 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); 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 head end to the rear end of the expansion tube (101). The frustum of the cone head (105) can fit with the convex arc surface. A threaded shaft (103) in the shape of a hollow shaft is coaxially rotatably installed in the expansion tube (101), 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, and a sliding connection is formed between the connecting rod (104) and the expansion tube (101); 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. 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).

2. The connecting device between a steel structure and a building exterior wall according to claim 1, 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.

3. The connecting device between a steel structure and a building exterior wall according to claim 1, characterized in that, A slider in the shape of a cylinder is coaxially arranged at the end of the connecting rod (104). Ribs are arranged on the outer circular surface of the slider, and the ribs form a sliding guiding fit with the sliding grooves arranged on the inner wall of the expansion tube (101). The guiding direction of the sliding grooves is parallel to the axial line direction of the expansion tube (101).

4. A connecting device between a steel structure and a building exterior wall according to claim 1, characterized in that On one side of the threaded sleeve (1063) away from the tail end of the expansion tube (101), an internal hexagonal head extends. An avoidance groove surrounding the internal hexagonal head is arranged on the front end face of the expansion tube (101).

5. The connection process of a connection device between a steel structure and a building exterior wall according to claim 1, characterized in that, It includes the following steps: Step 1: Insert the expansion tube (101) 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. Rotate the threaded shaft (103), and through the tapered head (105), expand the tail end of the expansion tube (101) to achieve the expansion connection between the expansion tube (101) and the fixing hole; Step 2: Rotate the threaded sleeve (1063) to make the locking claws (1062) hold the threaded shaft (103) and lock the threaded shaft (103); Step 3: The connecting component (200) includes an inner backing plate (201), an outer locking seat (202), a nut (203), a screw (205), and a connecting bracket (206); Threaded holes are arranged on the inner backing plate (201). The inner backing plate (201) is threadedly installed on the threaded shaft (103) and the inner backing plate (201) is in contact with the exterior wall of the building; Step 4: A sleeve hole is arranged on the outer locking seat (202). Convex plates extend from both sides of the inner backing plate (201) along the width direction; Fit the connecting bracket (206) with the inner backing plate (201) and the side of the connecting bracket (206) contacts the convex plate. Sleeve the outer locking seat (202) on the threaded shaft (103), and the screw holes arranged on the outer locking seat (202) are coaxially aligned with the screw holes arranged on the inner backing plate (201); Preliminarily screw the nut (203) onto the threaded shaft (103), adjust the height of the upper end of the connecting bracket (206) to make it at the preset height, and then tighten the nut (203) to achieve the preliminary fixation of the outer locking seat (202), the connecting bracket (206), and the inner backing plate (201); Step 5: Drill a screw hole in the connecting bracket (206), and the screw hole on the connecting bracket (206), the screw hole on the outer locking seat (202), and the screw hole on the inner backing plate (201) are coaxially aligned; Step 6: Install the screw (205) between the three screw holes to achieve the secondary fixation of the outer locking seat (202), the connecting bracket (206), and the inner backing plate (201); Step 7: A first bolt hole is arranged on the upper surface of the connecting bracket (206). A second bolt hole corresponding to and matching the first bolt hole is arranged on the steel structure. The steel structure and the connecting bracket (206) are fixedly connected through bolts.

Images