Embedded steel pipe of wall connecting piece of outer wall scaffold

Abstract

The invention belongs to the field of constructional engineering, and particularly relates to a wall connecting piece embedded steel pipe of an outer wall scaffold. Comprising a pipe body, a fixing mechanism and a connecting mechanism, wherein the fixing mechanism is arranged inside the pipe body and used for connecting a wall body; the connecting mechanism is arranged outside the pipe body and used for connecting a scaffold; the fixing mechanism comprises an internally-arranged rod and a threaded rod which is arranged at the bottom end of the internally-arranged rod and connected with the internally-arranged rod. The linkage fixing mechanism composed of the internal rod, the threaded rod and the pushing block is arranged in the pipe body, the problems that an existing external wall scaffold embedded pipe fitting is single in fixing mode, insufficient in grabbing force and prone to loosening and falling off are solved, the double reinforcing effect of longitudinal threaded anchoring and radial expansion clamping is achieved, and the construction efficiency is improved. And the pulling resistance and the stability of the wall connecting piece in the wall body are obviously improved.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of building engineering, and particularly relates to a wall connecting piece pre-embedded steel pipe of an outer wall scaffold. BACKGROUND

[0002] In the construction process of high-rise buildings, the outer wall scaffold is an important facility to ensure the safety of construction personnel and the smooth progress of work. In order to prevent the scaffold from overturning or swaying under the action of wind load or construction load, the scaffold body must be reliably connected with the main structure of the building through a wall connecting piece. Among them, the pre-embedded steel pipe as an important form of the wall connecting piece is usually pre-positioned in the hole of the wall body or before pouring, and is used for subsequent connection of the horizontal rod of the scaffold.

[0003] However, with the continuous development of construction technology, the existing wall connecting piece pre-embedded steel pipe gradually exposes the limitations in structural design. The traditional pre-embedding method is to directly pour the steel pipe into the concrete wall, which is relatively firm, but this method causes the steel pipe to be permanently combined with the wall, and cannot be taken out for recycling after the project is completed. Only the exposed part can be cut off, which not only causes a large amount of steel waste and increases the construction cost, but also affects the subsequent wall decoration construction.

[0004] In order to solve the recycling problem, some detachable insertion type pre-embedded pipes have appeared in the prior art. However, in actual application, such steel pipes usually rely only on the static friction force between the pipe wall and the reserved hole for fixation, and lack active gripping or locking mechanisms. When the wall reserved hole diameter deviates, or under the long-term construction vibration and wind pulling, the steel pipe is prone to looseness or even slip with the hole wall, resulting in failure of the wall connecting piece and serious safety hazards to the overall stability of the scaffold. Therefore, how to realize the radial expansion and firm locking of the steel pipe in the wall body under the premise of ensuring that the steel pipe can be disassembled and recycled without damage has become a technical problem to be solved in the current field. SUMMARY

[0005] The present application aims to overcome the defects in the prior art and provide a wall connecting piece pre-embedded steel pipe of an outer wall scaffold.

[0006] To achieve the above-mentioned purpose, the present application adopts the following technical solutions:

[0007] A wall connecting piece pre-embedded steel pipe of an outer wall scaffold, comprising a pipe body, a fixing mechanism for connecting the wall body arranged inside the pipe body, and a connecting mechanism for connecting the scaffold arranged outside the pipe body; the fixing mechanism comprises an inner rod and a threaded rod arranged at the bottom end of the inner rod and connected with the inner rod.

[0008] The pipe body is internally provided with an auxiliary fixing structure; the auxiliary fixing structure comprises a pushing block arranged on the outer wall of the internally arranged rod and two symmetrically arranged reinforcing assemblies matched with the pushing block; the reinforcing assembly comprises a connecting plate abuttingly matched with the pushing block and a fixing block fixedly connected to the outer side of the connecting plate; the outer diameter of the pushing block gradually increases in the direction of the bottom of the pipe body to form a wedge-shaped thrust structure; the side surface of the pipe body is provided with a through hole matched with the fixing block.

[0009] The internally arranged rod is configured to be able to reciprocally linearly move along the axial direction of the pipe body and rotate around the axis;

[0010] When the internally arranged rod drives the pushing block to move downward, the pushing block is configured to push the connecting plate to move outward, so that the fixing block extends out of the through hole and is embedded into the wall body;

[0011] When the internally arranged rod drives the pushing block to move upward, the pushing block is configured to apply an inward thrust to the connecting plate, so that the fixing block moves to the inside of the pipe body;

[0012] The threaded rod is configured to rotate with the internally arranged rod and can extend out of the bottom of the pipe body to be screwed into the wall body.

[0013] The top of the internally arranged rod is internally embedded with a spring rod, and the top of the spring rod is fixedly connected with a pulling block; the pulling block extends to the top end outside of the pipe body and is configured to be pulled and rotated under force to drive the internally arranged rod, the threaded rod and the pushing block to axially move or circumferentially rotate.

[0014] The connecting mechanism comprises a first connecting sleeve sleeved on the outside of the pipe body, a fixing bolt penetrating through the first connecting sleeve and a second connecting sleeve connected with the first connecting sleeve; the second connecting sleeve is used to be connected with a scaffold; the internally arranged rod is provided with a fixing hole matched with the fixing bolt.

[0015] Preferably, the fixing hole is a plurality of fixing holes arranged at intervals along the axial direction of the internally arranged rod.

[0016] Compared with the prior art, the present application has the following beneficial effects:

[0017] The present application sets the linkage fixing mechanism composed of the internally arranged rod, the threaded rod and the pushing block in the pipe body, uses the axial movement of the internally arranged rod to drive the threaded rod at the bottom to be screwed into the deep part of the wall body to provide longitudinal tension, and at the same time uses the wedge-shaped structure of the pushing block to drive the reinforcing assemblies on both sides to expand outwardly and embed into the wall body, solves the problem that the fixing mode of the existing external wall scaffold embedded pipe is single and the holding force is insufficient and easy to loosen and fall off, achieves the double reinforcing effects of longitudinal threaded anchoring and radial expansion clamping, and significantly improves the pull-out resistance and stability of the wall connecting piece in the wall body.

[0018] The slope cooperation between the pushing block and the reinforcing assembly and the reversible driving design make the fixed block outside the extending pipe automatically retract into the inside of the pipe body when the inside rod reversely moves, solve the problem that the traditional embedded part is fixed with the wall body after installation or pouring and cannot be disassembled and recycled, and achieve the technical effects that the embedded steel pipe can be taken out from the wall body without damage, the recycling is realized, and the construction material cost is effectively reduced.

[0019] Meanwhile, by the fixed bolt in the connecting mechanism penetrating through the first connecting sleeve and the side wall of the pipe body and directly inserting into the fixed hole on the surface of the inside rod, the problem that the internal fixing mechanism is loosened and the external connecting sleeve is easily slipped in the construction vibration is solved, the effect of "one bolt with two functions" is achieved, that is, the internal expansion fixing mechanism is mechanically locked when the external scaffold connecting sleeve is fastened, the retraction is prevented, and the safety and anti-misoperation ability of the whole structure of the scaffold are greatly improved.

[0020] Furthermore, by the spring rod and the pulling block arranged on the top of the inside rod and matched with the fixed hole, the problem that the deep mechanism is difficult to operate in the narrow or complex pipe body is solved, the technical effects that the operator can conveniently control the internal mechanism to extend or retract or disassemble outside the pipe body and flexibly adjust the locking position according to the actual wall depth are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional schematic view of the embedded steel pipe of the wall connecting piece of the external wall scaffold of the application;

[0022] Figure 2 It is a sectional view of the embedded steel pipe of the wall connecting piece of the external wall scaffold of the application;

[0023] Figure 3 It is a structural schematic view of the inside rod of the embedded steel pipe of the wall connecting piece of the external wall scaffold of the application;

[0024] Figure 4 It is a structural schematic view of the connecting mechanism of the embedded steel pipe of the wall connecting piece of the external wall scaffold of the application.

[0025] In the figure, 1 is a pipe body, 2 is a fixing mechanism, 21 is an inside rod, 22 is a threaded rod, 23 is a pushing block, 24 is a spring rod, 25 is a pulling block, 26 is a fixed hole, 27 is a reinforcing assembly, 271 is a fixed block, 272 is a connecting plate, 3 is a connecting mechanism, 31 is a first connecting sleeve, 32 is a fixed bolt, and 33 is a second connecting sleeve. DETAILED DESCRIPTION

[0026] In order for the person skilled in the art to better understand the technical solutions of the application, the application will be further described in detail below in combination with the drawings and the best embodiment.

[0027] Figures 1-4 The connecting wall piece embedded steel pipe of the outer wall scaffold is shown, including a pipe body 1, a fixing mechanism 2 arranged inside the pipe body for connecting the wall, and a connecting mechanism 3 arranged outside the pipe body for connecting the scaffold; the fixing mechanism 2 includes an inner rod 21 and a threaded rod 22 arranged at the bottom end of the inner rod and connected with the inner rod; the pipe body 1 serves as an external main support structure for accommodating the fixing mechanism 2 and being inserted into the reserved position of the wall, and the fixing mechanism 2 is used for firmly clamping the pipe body 1 inside the wall through mechanical action after the pipe body 1 is inserted into the wall; the inner rod 21 is slidingly fitted inside the pipe body 1 and is configured to reciprocally move linearly along the axial direction of the pipe body 1 and rotate around the axis; the threaded rod 22 is fixedly connected to the bottom end of the inner rod 21 and is coaxially arranged with the inner rod 21, and the threaded rod 22 is configured to move with the inner rod 21 and extend out of the bottom of the pipe body 1, and is screwed into the deep part of the wall through rotating action, thereby providing longitudinal pulling anchoring force.

[0028] An auxiliary fixing mechanism is arranged inside the pipe body; the auxiliary fixing mechanism includes a pushing block 23 arranged on the outer wall of the inner rod and two symmetrically arranged reinforcing assemblies 27 matched with the pushing block 23; the reinforcing assembly includes a connecting plate 272 abuttingly matched with the pushing block and a fixed block 271 fixedly connected to the outer side of the connecting plate; the outer diameter of the pushing block 23 gradually increases in the direction of the bottom of the pipe body to form a wedge-shaped thrust structure; Figure 2 A through hole matched with the fixed block 271 is formed in the side surface of the pipe body.

[0029] The pushing block 23 is fixedly connected to the outer wall of the inner rod 21 and located inside the space of the pipe body 1; the reinforcing assembly 27 is movably embedded in the side wall of the pipe body 1 and located at the side of the pushing block 23; the outer surface of the pushing block 23 and the inner side surface of the reinforcing assembly 27 always abut each other; the pushing block 23 is moved by the axial movement of the inner rod 21, and then the reinforcing assembly 27 is driven to slide outward along the radial direction of the pipe body 1 to be embedded in the wall or to be retracted inward to be separated from the wall by using the inclined surface or wedge-shaped matching principle.

[0030] When the inner rod 21 drives the pushing block 23 to move downward, the pushing block 23 is configured to push the connecting plate 272 to move outward, so that the fixed block extends out of the through hole and is embedded in the wall; when the inner rod drives the pushing block to move upward, the pushing block is configured to apply an inward pushing force to the connecting plate, so that the fixed block moves to the inside of the pipe body; the threaded rod 22 is configured to move with the inner rod 21 and extend out of the bottom of the pipe body to be screwed into the inside of the wall.

[0031] The connecting plate 272 is located inside the tube body 1 and is close to the outer wall of the push block 23. The side wall of the tube body 1 has a through hole for the reinforcement component 27 to move telescopically. The fixing block 271 is slidably fitted inside the through hole. When the fixing mechanism 2 is in working state, the fixing block 271 is subjected to force and protrudes outward from the through hole.

[0032] The push block 23 preferably adopts a frustum-shaped or wedge-shaped structure, with its outer diameter gradually increasing along the bottom direction of the tube body 1, thereby forming a guide slope on the surface. When the internal rod 21 drives the push block 23 to move downward, the large-diameter end of the push block 23 gradually presses against the connecting plate 272, pushing the connecting plate 272 to drive the fixed block 271 to open outward; when the internal rod 21 drives the push block 23 to move upward, the push block 23 cooperates with the connecting plate 272 to give it an inward pushing force or release the squeezing force, causing the fixed block 271 to move and retract into the tube body 1.

[0033] A spring rod 24 is embedded inside the top of the internal rod 21, and a pull block 25 is fixedly connected to the top of the spring rod. The pull block extends to the outside of the top end of the tube and is configured to be pulled and rotated to drive the internal rod, threaded rod, and push block to move axially or rotate circumferentially. (Refer to...) Figure 2 and Figure 3 The inner rod 21 has a receiving groove at its top end, and the spring rod 24 is embedded and fixed in the receiving groove at the top of the inner rod 21. The pull block 25 is fixedly connected to the top of the spring rod 24 and extends to the outside of the top end of the tube body 1. The pull block 25 is shaped for easy hand gripping or tool clamping. As a force-applying component, the pull block 25 transmits the pulling force and torque to the inner rod 21 through the spring rod 24, thereby driving the inner rod 21 to move axially up and down and rotate circumferentially inside the tube body 1.

[0034] By pulling down or pressing the pull block 25, the internal rod 21 is driven to move the push block 23 downward. The outer surface of the push block 23 presses against the inner side of the connecting plate 272. The wedge-shaped guide effect forces the two reinforcing components 27 to open radially outward, so that the fixing block 271 is embedded in the wall. Conversely, by pulling up the pull block 25, the internal rod 21 is driven to move the push block 23 upward. The push block 23 and the connecting plate 272 work together to apply an inward pushing force, causing the fixing block 271 to retract into the tube 1, thus realizing the switching of gripping and releasing the wall.

[0035] The connecting mechanism 3 includes a first connecting sleeve 31 sleeved on the outside of the pipe body, a fixing bolt 32 passing through the first connecting sleeve, and a second connecting sleeve 33 connected to the first connecting sleeve; the second connecting sleeve 33 is used to connect with the scaffold. The inner rod 21 has fixing holes 26 on its side wall that match the fixing bolts. The fixing holes 26 are radially arranged along the inner rod 21, and preferably multiple fixing holes 26 are spaced apart along the axial direction of the inner rod 21 to facilitate locking adjustment at different depth positions.

[0036] Specifically, refer to Figure 1 and Figure 4 The inner diameter of the first connecting sleeve 31 is adapted to the outer diameter of the pipe body 1, allowing it to slide and adjust its position along the outer wall of the pipe body 1. The fixing bolt 32 is configured as a dual-function fastener. The end of the fixing bolt 32 passes through the side wall of the pipe body 1 and is threaded into the fixing hole 26. By tightening the fixing bolt 32, the first connecting sleeve 31 is firmly fixed to the outer surface of the pipe body 1, and the bolt end inserted into the fixing hole 26 forms a mechanical barrier, restricting the axial movement and rotation of the internal rod 21, thereby locking the internal fixing mechanism 2 of the pipe body 1 in its current state and effectively preventing the internal mechanism from loosening due to construction vibration. The second connecting sleeve 33 is fixedly connected to the outer surface of the first connecting sleeve 31 by welding or threading, and the axial direction of the second connecting sleeve 33 is perpendicular to the axial direction of the first connecting sleeve 31. The second connecting sleeve 33 is used to fit and fix other pipe bodies 1 or transverse rods, realizing multi-directional connection expansion.

[0037] The working principle of this invention is as follows:

[0038] When installation and fixing are required, first insert the tube 1 into the pre-reserved hole or positioning point in the wall. The operator holds the pull block 25 located on the outside of the top of the tube 1, applies downward pressure to the pull block 25 and rotates it at the same time. The pull block 25 drives the internal rod 21 and the threaded rod 22 at the bottom to move downward and rotate synchronously through the spring rod 24. The threaded rod 22 then screws into the structure deep in the wall, providing longitudinal anchoring force.

[0039] As the internal rod 21 moves downward, the push block 23, fixedly connected to the surface of the internal rod 21, moves downward accordingly. Because the push block 23 adopts a wedge-shaped or frustum-shaped structure with its large-diameter end facing downward, the outer surface of the push block 23 gradually presses against the inner surfaces of the connecting plates 272 on both sides, converting the longitudinal thrust into a radial expansion force. This forces the connecting plates 272 to drive the fixing block 271 to slide outward along the through hole in the side wall of the tube body 1 until the fixing block 271 is completely embedded in the wall. At this time, the longitudinal gripping of the threaded rod 22 and the radial expansion and locking of the fixing block 271 work together to firmly position the tube body 1 within the wall.

[0040] After completing the above expansion and anchoring action, move the first connecting sleeve 31 that is sleeved on the outside of the pipe body 1 so that the fixing bolt 32 on it is aligned with the fixing hole 26 on the side of the inner rod 21. Tighten the fixing bolt 32. The end of the fixing bolt 32 passes through the side wall of the pipe body 1 and is inserted into the fixing hole 26. This action achieves double locking: on the one hand, the first connecting sleeve 31 is firmly fixed on the pipe body 1, and on the other hand, the position of the inner rod 21 is mechanically locked to prevent the fixing block 271 from retracting due to vibration of the inner rod 21, thereby ensuring the safety of the overall connection structure. Then the external scaffolding pipe can be connected to the second connecting sleeve 33.

[0041] When the scaffolding is dismantled and the pipe body 1 needs to be retrieved, first loosen and remove the fixing bolt 32 to release the lock on the inner rod 21. Then pull upward and rotate the pull block 25 in the opposite direction. The inner rod 21 drives the threaded rod 22 to unscrew from the wall, and at the same time drives the push block 23 to move upward. As the large diameter end of the push block 23 moves upward, the connecting plate 272 loses the outward squeezing force. Under the action of the cooperating structure, it drives the fixing block 271 to retract inward back into the pipe body 1. At this time, the outer wall of the pipe body 1 returns to flatness and no longer mechanically engages with the wall. The operator can then directly pull the pipe body 1 out of the hole in the wall to complete the retrieval and dismantling process.

[0042] The above description is only a preferred embodiment of the present invention. For those skilled in the art, there will be changes in the specific implementation and application scope based on the ideas of the present invention. The content of this specification should not be construed as a limitation of the present invention.

Claims

1. A pre-embedded steel pipe for wall ties in external wall scaffolding, characterized in that, It includes a pipe body, a fixing mechanism disposed inside the pipe body for connecting to a wall, and a connecting mechanism disposed outside the pipe body for connecting to scaffolding; the fixing mechanism includes an internal rod and a threaded rod disposed at the bottom end of the internal rod and connected to the internal rod.

2. The pre-embedded steel pipe for wall ties of external wall scaffolding according to claim 1, characterized in that, The tube body is provided with an auxiliary fixing structure; the auxiliary fixing structure includes a push block disposed on the outer wall of the inner rod and two symmetrically arranged reinforcing components that cooperate with the push block; the reinforcing components include a connecting plate that abuts against the push block and a fixing block fixedly connected to the outside of the connecting plate; the outer diameter of the push block gradually increases along the bottom direction of the tube body to form a wedge-shaped thrust structure; the side surface of the tube body is provided with a through hole that matches the fixing block.

3. The pre-embedded steel pipe for wall ties of external wall scaffolding according to claim 2, characterized in that, The internal rod is configured to reciprocate linearly along the axis of the tube and rotate about the axis. When the internal rod drives the push block to move downward, the push block is configured to push the connecting plate to move outward, causing the fixing block to extend out of the through hole and embed into the interior of the wall; When the internal rod drives the push block to move upward, the push block is configured to apply an inward thrust to the connecting plate, causing the fixed block to move into the tube body; The threaded rod is configured to rotate with the internal rod and extend out of the bottom of the tube to be threaded into the interior of the wall.

4. The pre-embedded steel pipe for wall ties of external wall scaffolding according to claim 1, characterized in that, The inner rod is embedded with a spring rod at the top, and a pull block is fixedly connected to the top of the spring rod; the pull block extends to the outside of the top of the tube and is configured to be pulled and rotated by force, so as to drive the inner rod, the threaded rod and the push block to move axially or rotate circumferentially.

5. The pre-embedded steel pipe for wall ties of external wall scaffolding according to claim 1, characterized in that, The connecting mechanism includes a first connecting sleeve sleeved on the outside of the pipe body, a fixing bolt passing through the first connecting sleeve, and a second connecting sleeve connected to the first connecting sleeve; the second connecting sleeve is used to connect with the scaffold; the inner rod is provided with a fixing hole matching the fixing bolt.

6. The pre-embedded steel pipe for wall ties of external wall scaffolding according to claim 5, characterized in that, The fixing holes are multiple holes that are spaced apart along the axial direction of the inner rod.

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