A pre-buried hole pre-buried sleeve removal device and construction method thereof

Abstract

The present invention discloses a pre-embedded hole pre-embedded sleeve removal device and a construction method thereof, and relates to the technical field of building construction, comprising a pre-embedded sleeve, an isolation film is attached to the outside of the pre-embedded sleeve, a top cover is connected to the top of the pre-embedded sleeve, an insertion hole is provided on the top cover, retaining columns located in the pre-embedded sleeve are fixed on both sides of the insertion hole, a fixing piece for fixing the pre-embedded sleeve on a building template is inserted in the insertion hole, the pre-embedded sleeve is equipped with a screw self-removal mechanism capable of removing the pre-embedded sleeve from the building template, the screw self-removal mechanism comprises a lifting screw, a lifting screw is threadedly connected to the lifting screw, a lifting wing is fixed to the outside of the lifting screw, and the lifting wing and the lifting screw form a cross-like structure adapted to the insertion hole. The present invention enables construction personnel to no longer have too high a time requirement when removing the pre-embedded sleeve, and the molding quality of the pre-embedded hole is basically not affected when removing the pre-embedded sleeve, and the removal process is easier and faster.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a pre-buried hole pre-buried sleeve removal device and a construction method thereof. Background Art

[0002] With the development of the national economy, the improvement of construction quality in the construction industry has become the basic starting point for the management of each construction project. The construction quality of the reserved holes in cast-in-place concrete slabs directly or indirectly affects the quality of the main structure to varying degrees. How to quickly, accurately, and ensure quality and quantity in completing the pre-buried construction of cast-in-place concrete slab holes has become a problem that the management of the project under construction has to consider.

[0003] When pre-embedded holes are made in traditional cast-in-place concrete slabs, the pre-embedded hole mold is generally fixed to the bottom side formwork of the slab. After the concrete is poured, the pre-embedded hole mold is promptly removed from the slab formwork after the concrete has initially solidified.

[0004] The traditional method of removing the embedded hole mold has a high time requirement. It must be removed in time when the concrete setting strength is not high. Otherwise, once the concrete is completely solidified, the tightness of the combination of concrete and the embedded hole mold will be greatly improved, which greatly increases the difficulty of removing the embedded hole mold. Construction workers have to use tools such as iron rods and hammers to "violently" remove it. This removal method will not only damage the embedded hole mold, but also affect the molding quality of the hole. At the same time, it also requires a lot of manpower, material resources, and financial resources, and is time-consuming and labor-intensive. Summary of the invention

[0005] In view of the deficiencies in the above-mentioned background technology, the present invention proposes a pre-embedded hole and pre-embedded sleeve removal device and a construction method thereof. The present invention enables construction personnel to remove the pre-embedded sleeve without having to set too high a time requirement, and the removal of the pre-embedded sleeve will basically not affect the molding quality of the pre-embedded hole. At the same time, the removal process is easier and faster.

[0006] The technical solution of the present invention is achieved in this way:

[0007] A pre-embedded hole pre-embedded sleeve removal device, comprising a top cover, the top cover is connected to the pre-embedded sleeve with an isolation film attached to the outer wall, an insertion hole is opened on the top cover, and blocking columns located in the pre-embedded sleeve are fixed on both sides of the insertion hole. The pre-embedded sleeve is equipped with a screw self-removal mechanism capable of removing the pre-embedded sleeve from the building template;

[0008] The screw self-removal mechanism comprises a lifting screw, a lifting screw tube is threadedly connected to the lifting screw, a lifting wing is fixed on the outer side of the lifting screw tube, and the lifting wing and the lifting screw tube form a cross-like structure matched with the insertion hole.

[0009] The present invention is further configured such that when the lifting screw is located in the insertion hole and is coaxially arranged with the insertion hole, the shortest distance between the end of the lifting wing away from the lifting screw tube and the central axis of the lifting screw is greater than the shortest distance between the blocking column and the central axis of the insertion hole.

[0010] The present invention is further configured such that an integrally formed hexagonal column is provided at the top end of the lifting screw.

[0011] The present invention is further configured such that a force-bearing base adapted to the insertion hole is fixed to the bottom end of the lifting screw rod, and an anti-deflection rod is provided on a side of the force-bearing base away from the lifting screw rod.

[0012] The present invention is further configured such that the force-bearing base is an arc-shaped piece, and the opening side of the arc-shaped piece faces the lifting screw.

[0013] The present invention is further configured such that one end of the anti-deflection rod away from the force-bearing base is a conical head.

[0014] The present invention is further configured such that the length of the lifting screw is 2-2.5 times the height of the embedded sleeve.

[0015] The present invention is further configured such that when the embedded sleeve is fixed on the building template, the embedded sleeve is connected to the building template through a fixing piece, the fixing piece includes an L-shaped fixed pull rod, a support rod of the fixed pull rod is provided with a threaded wire, the support rod of the fixed pull rod provided with the threaded wire passes through the building template from below the building template into the embedded sleeve and extends out from the insertion hole, one end of the fixed pull rod extending out of the insertion hole is sleeved with a reinforcing gasket and is threadedly connected with a fixing nut, and a support rod of the fixed pull rod away from the insertion hole is pressed against the bottom surface of the building template.

[0016] A construction method for removing a pre-buried hole pre-buried sleeve device comprises the following steps:

[0017] Step 1: Remove the fixing member provided between the building template and the embedded sleeve;

[0018] Step 2: Adjust the position of the jacking screw tube on the jacking screw rod, and insert the jacking screw rod with the jacking screw tube into the insertion hole, so that the jacking screw rod and the insertion hole are arranged coaxially, and the anti-deflection end under the jacking screw rod contacts the building template, while keeping the jacking wing plate between the blocking columns;

[0019] Step 3: The jacking screw is driven to rotate by an external tool. The jacking screw drives the jacking wing to rest on the stop column and deviate from the insertion hole through the jacking screw tube. The jacking wing rises under the drive of the jacking screw and pushes the top cover on the top of the embedded sleeve to make the embedded sleeve separate from the embedded hole of the building component.

[0020] The beneficial effects of the present invention are:

[0021] 1. When pouring building components, the embedded sleeves pre-installed on the building template can form embedded holes in the poured building components. The embedded sleeves can be disassembled from the building components through the screw self-removal mechanism, which has a low removal time requirement.

[0022] 2. When removing the embedded sleeve, the isolation film makes the solidified concrete only press the embedded sleeve instead of completely fixing it in the embedded hole. By rotating the jacking screw, the jacking screw and the jacking wing can be raised. The rising of the jacking wing can push the embedded sleeve to rise from the embedded hole, thereby realizing the detachment of the embedded sleeve from the embedded hole. There is no need to worry about whether the concrete is completely solidified during the whole detachment process, and there is no time requirement.

[0023] 3. When rotating the jacking screw, an external tool can be clamped on the jacking screw or the hexagonal column on the top of the jacking screw, such as an electric wrench. The external tool can drive the jacking screw to rotate to achieve the removal of the embedded sleeve. The entire disassembly process is convenient and simple. Compared with the traditional "violent demolition", it will not damage the structure of the embedded hole and will not affect the overall quality of the building structure.

[0024] 4. The force-bearing base can prevent the lifting screw from falling from the hole corresponding to the fixed rod opened on the building template, thereby ensuring the feasibility of the present invention. When the anti-deflection rod is inserted into the hole corresponding to the fixed rod opened on the building template, the lifting screw can be prevented from deviating. Even if the building template has not yet opened the hole corresponding to the fixed rod, the conical head at the bottom end of the anti-deflection rod can form a positioning slot on the building template when rotating, thereby reducing the possibility of deviation of the lifting screw. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying any creative work.

[0026] Figure 1 It is a structural schematic diagram of the screw self-removal mechanism of the present invention when it is inserted into the embedded sleeve;

[0027] Figure 2 for Figure 1 Structural diagram when removing the embedded sleeve;

[0028] Figure 3 It is a schematic diagram of the structure of the fixed pull rod;

[0029] Figure 4 It is a structural schematic diagram of the screw self-removal mechanism in the present invention;

[0030] Figure 5 A schematic diagram of a structure in which at least two embedded sleeves are installed on a building formwork;

[0031] Figure 6 It is a structural schematic diagram of removing different embedded sleeves through the screw self-removal mechanism.

[0032] In the figure, 1. embedded sleeve; 11. top cover; 12. insertion hole; 13. stop column; 21. fixed pull rod; 22. reinforcement gasket; 23. fixed nut; 31. lifting screw; 32. lifting screw tube; 33. lifting wing; 41. load-bearing base; 42. anti-deflection rod; 311. hexagonal column; 5. connecting rod. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] Embodiment 1:

[0035] Reference Figure 1 and Figure 2 , a pre-embedded hole pre-embedded sleeve removal device, comprising a top cover 11, the top cover 11 is connected to the top end of the pre-embedded sleeve 1 with an isolation film (not shown) attached to the outside. An insertion hole 12 coaxially arranged with the central axis of the pre-embedded sleeve 1 is provided on the top cover 11. Specifically, the pre-embedded sleeve 1 is a cylindrical cylinder, the isolation film is a PE plastic film, the top cover 11 is welded to the top end of the pre-embedded sleeve 1 by spot welding, and the insertion hole 12 is a cross-shaped hole composed of a concentrically arranged circular hole and a rectangular hole, and the cross-shaped hole is coaxially arranged with the pre-embedded sleeve 1.

[0036] The isolation film can prevent the embedded sleeve 1 from directly contacting the concrete, preventing the embedded sleeve 1 from being completely fixed to the solidified concrete, and facilitating the later removal of the embedded sleeve 1. The insertion hole 12 facilitates the subsequent placement of removal tools in the embedded sleeve 1.

[0037] Two stopper columns 13 are fixed to one side of the top cover 11 close to the inside of the embedded sleeve 1. The two stopper columns 13 are respectively located on both sides of the insertion hole 12 and are both arranged vertically to the top cover 11. The two stopper columns 13 are arranged symmetrically about the center of the insertion hole 12 on the top cover 11.

[0038] Reference Figure 3 and Figure 5Before pouring the floor slab, the embedded sleeve 1 needs to be installed on the bottom side template of the floor slab. Before installing the embedded sleeve 1, it is necessary to open a mounting hole at a suitable position of the bottom side template of the floor slab according to the construction requirements, and then place the embedded sleeve 1 to be installed on the bottom side template of the floor slab, and align the insertion hole 12 on the top cover 11 with the installation hole on the bottom side template of the floor slab. Then, the embedded sleeve 1 is installed on the floor slab template by inserting the fixing piece in the insertion hole 12.

[0039] Specifically, the fixing part includes an L-shaped fixing rod 21, on which a support rod is provided with a threaded wire. The support rod of the fixing rod 21 provided with a threaded wire passes through the mounting hole on the floor formwork from one side below the floor formwork and extends to the embedded sleeve 1, and then the support rod extends from the insertion hole 12 of the top cover 11.

[0040] One end of the fixed rod 21 extending out of the insertion hole 12 is sleeved with a reinforcing gasket 22 and is threadedly connected with a fixing nut 23. The fixing nut 23 is screwed to make the reinforcing gasket 22 press against the top surface of the top cover 11, and to make a support rod of the fixed rod 21 away from the insertion hole 12 press against the bottom surface of the floor template, thereby achieving the fixing of the embedded sleeve 1 on the floor template.

[0041] After the installation of the embedded sleeve 1 on the building template is completed, concrete can be poured on the building template to complete the concrete pouring of the building structure. After the concrete solidifies and forms, the embedded sleeve 1 is removed and the construction of the building floor structure with the embedded hole is completed.

[0042] It should be noted that the height of the embedded sleeve 1 should be greater than the designed thickness of the floor to be cast (5±0.5) cm. The height of the embedded sleeve 1 is greater than the thickness of the floor to be cast, which can prevent the embedded sleeve 1 from being immersed in the floor.

[0043] Reference Figure 2 , Figure 4 and Figure 6 In this embodiment, the embedded sleeve 1 is equipped with a screw self-removal mechanism capable of removing the embedded sleeve 1 from the floor formwork. The screw self-removal mechanism includes a lifting screw 31, and the length of the lifting screw 31 is 2-2.5 times the height of the embedded sleeve 1. A lifting screw tube 32 is threadedly connected to the lifting screw 31, and a lifting wing 33 is fixed to the outer wall of the lifting screw tube 32. There are two lifting wings 33, and the two lifting wings 33 are symmetrically arranged about the central axis of the lifting screw tube 32.

[0044] The two lifting fins 33 and the lifting screw tube 32 form a cross-like structure that can be matched with the insertion hole 12. When the lifting screw rod 31 is located in the insertion hole 12 and is coaxially arranged with the insertion hole 12, the shortest distance between the end of the lifting fin 33 away from the lifting screw tube 32 and the central axis of the lifting screw rod 31 is greater than the shortest distance between the stop column 13 and the central axis of the insertion hole 12.

[0045] A force bearing base 41 adapted to the cross-shaped insertion hole 12 is fixed to the bottom end of the lifting screw 31, and the force bearing base 41 is an arc-shaped plate, and the opening side of the arc-shaped plate faces the lifting screw 31. An anti-deflection rod 42 coaxially arranged with the lifting screw 31 is fixed to the side of the force bearing base 41 away from the lifting screw 31, and the end of the anti-deflection rod 42 away from the force bearing base 41 is a conical head.

[0046] When the floor slab is poured and solidified, the embedded sleeve 1 needs to be removed. When removing the embedded sleeve 1, first remove the fixing nut 23 from the L-shaped fixing rod 21 using a tool such as an electric wrench. The fixing rod 21 with the fixing nut 23 removed will fall from the corresponding bottom side template of the floor slab under the action of its own gravity.

[0047] After the fixing rod 21 is separated from the embedded sleeve 1 , the lifting screw 31 with the lifting fin 33 and the lifting screw tube 32 is inserted into the embedded sleeve 1 from the insertion hole 12 .

[0048] It should be noted that before inserting the lifting screw 31 into the embedded sleeve 1, it is necessary to adjust the position of the lifting screw tube 32 on the lifting screw 31 to avoid the situation where the lifting wing plate on the lifting screw tube 32 is located below the retaining column 13 when the lifting screw 31 is inserted and rests on the floor formwork.

[0049] After the lifting screw 31 is inserted into the embedded sleeve 1, adjust the lifting screw 31 so that the anti-deflection rod 42 at the bottom end of the lifting screw 31 is inserted into the installation hole opened on the floor template, and the force-bearing base 41 is pressed against the floor template. Then, try to keep the lifting screw 31 coaxial with the insertion hole 12 and try to keep the lifting screw 31 perpendicular to the bottom side template of the floor. Then, use an external tool to rotate the lifting screw 31 until the embedded sleeve 1 is completely separated from the solidified concrete floor.

[0050] The anti-deflection rod 42 inserted into the mounting hole on the floor template can limit the jacking screw 31, preventing the bottom end of the jacking screw 31 from deviating randomly on the floor template when the jacking screw 31 rotates. At the same time, the force-bearing base 41 can prevent the jacking screw 31 from being directly inserted into the mounting hole of the floor template, preventing the jacking screw 31 from falling from the mounting hole on the floor template, making the present invention impossible to implement.

[0051] If no mounting hole is provided on the bottom side formwork of the floor slab, it is necessary to first keep the lifting screw 31 perpendicular to the bottom side formwork of the floor slab, and then when the lifting screw 31 is rotated, the conical head on the anti-deflection rod 42 will leave a positioning slot on the floor slab formwork, and the positioning slot can prevent the lifting screw 31 from rotating at will when the lifting screw 31 is rotated.

[0052] At the initial stage of rotation of the jacking screw 31, the jacking screw 31 will drive the jacking screw tube 32 to rotate synchronously until the jacking wing 33 on the jacking screw tube 32 rotates to abut against the stop column 13 fixed on the top cover 11 of the embedded sleeve 1. Since the embedded sleeve 1 is always located on the floor template during the floor pouring process, when the floor solidifies, the embedded sleeve 1 is basically fixed in the floor. When the jacking screw 31 continues to rotate, the jacking wing 33 will only abut against the stop column 13, and will not drive the embedded sleeve 1 to rotate on the floor through the stop column 13.

[0053] After the lifting wing 33 is pressed against the stop column 13, the lifting wing 33 will deviate from the insertion hole 12 after deflection, and the lifting wing 33 after deviation can no longer be separated from the insertion hole 12. Since the lifting wing 33 is pressed against the stop column 13, the stop column 13 limits the rotation of the lifting wing 33, thereby limiting the rotation of the lifting screw 32. When the lifting screw 31 is rotated continuously, the force base 41 on the lifting screw 31 will press against the floor template and the lifting screw 32 will gradually rise on the lifting screw 31, thereby driving the lifting wing 33 to gradually rise and press against the top cover 11 of the embedded sleeve 1, thereby causing the lifting wing 33 to push the top cover 11 to rise, thereby pushing the embedded sleeve 1 to gradually separate from the embedded hole of the floor. When the embedded sleeve 1 is completely separated from the floor, the removal of the embedded sleeve 1 is completed.

[0054] The screw self-removal mechanism introduced in this embodiment can remove the embedded sleeve 1 without paying too much attention to the solidification time of concrete, and the time requirement is not high. At the same time, compared with the "violent demolition" demolition method, this embodiment will not damage the embedded holes when removing the embedded sleeve 1, thereby ensuring the molding quality of the embedded holes. In addition, the force-bearing base 41 can prevent the jacking screw 31 from detaching from the floor template, and the anti-deviation end head can limit the deviation of the jacking screw 31. In addition, in this embodiment, the removal of the embedded sleeve 1 only requires adjusting and rotating the jacking screw 31, and the construction personnel can directly use external wrenches and other tools to remove it, which makes the removal of the embedded sleeve 1 faster and more convenient.

[0055] Embodiment 2:

[0056] This embodiment is a further supplement made on the basis of Embodiment 1.

[0057] In this embodiment, when more than one embedded holes are set on the concrete floor to be cast, when fixing the embedded sleeve 1, it is only necessary to fix any one embedded sleeve 1 on the floor formwork through a fixing member, and the other embedded sleeves 1 are fixedly connected to the embedded sleeves 1 that have been fixed on the floor formwork through connecting rods 5 and bolts.

[0058] like Figure 5As shown, when there is only one embedded sleeve installed on the floor template by means of a fixing piece, all other embedded sleeves 1 are installed on a connecting rod 5 by means of bolts according to construction requirements, and then the connecting rod 5 is connected to the embedded sleeve 1 installed on the floor template by means of a fixing piece. The above method reduces the waste of fixing pieces when there are multiple embedded holes in the floor, and also reduces the demand for opening holes in the floor template.

[0059] Embodiment 3:

[0060] This embodiment is a further improvement made on the basis of Embodiment 1 or Embodiment 2.

[0061] Reference Figure 1 In this embodiment, the top of the lifting screw rod 31 is provided with a hexagonal column 311 integrally formed with the lifting screw rod 31. The hexagonal column 311 can be adapted to electric tools such as electric wrenches, making it easier for construction workers to disassemble the embedded sleeve 1 on the floor slab.

[0062] Embodiment 4:

[0063] A construction method for removing a pre-buried hole pre-buried sleeve 1 comprises the following steps:

[0064] Step 1: Remove the fixings provided between the building formwork and the embedded sleeve 1.

[0065] Specifically, after the floor slab solidifies and takes shape, the fixing nut 23 is loosened by an electric wrench or other construction tools to separate the fixing nut 23 and the reinforcing gasket 22 from the L-shaped fixing rod 21. Then, the L-shaped fixing rod 21 will separate from the corresponding hole on the bottom side formwork of the floor slab under the action of its own gravity.

[0066] Step 2: Adjust the position of the lifting screw tube 32 on the lifting screw rod 31, and insert the lifting screw rod 31 with the lifting screw tube 32 into the insertion hole 12, so that the lifting screw rod 31 and the insertion hole 12 are coaxially arranged, and the anti-deflection end below the lifting screw rod 31 is in contact with the building formwork, while keeping the lifting wing 33 between the blocking columns 13.

[0067] Step three: Use an external tool to drive the hexagonal column 311 on the top of the jacking screw 31 to rotate. When the hexagonal column 311 rotates, it drives the jacking screw 31 to rotate. The jacking screw 31 drives the jacking wing 33 to press against the blocking column 13 and deviate from the insertion hole 12 through the jacking screw tube 32. The jacking wing 33 rises under the drive of the jacking screw 31 and pushes the top cover 11 on the top of the embedded sleeve 1, so that the embedded sleeve 1 is separated from the reserved hole of the building component, and the removal of the embedded sleeve 1 is completed.

[0068] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A device for removing pre-buried sleeves from pre-buried holes. Features: The invention comprises a top cover (11), the top cover (11) being connected to a pre-embedded sleeve (1) having an isolation film attached to its outer wall, an insertion hole (12) being provided on the top cover (11), retaining columns (13) located in the pre-embedded sleeve (1) being fixed on both sides of the insertion hole (12), and the pre-embedded sleeve (1) being equipped with a screw self-removal mechanism capable of removing the pre-embedded sleeve (1) from the building template; The screw self-removal mechanism comprises a lifting screw (31), a lifting screw tube (32) is threadedly connected to the lifting screw (31), a lifting wing (33) is fixed to the outside of the lifting screw tube (32), and the lifting wing (33) and the lifting screw tube (32) form a cross-like structure that is compatible with the insertion hole (12); When the lifting screw (31) is located in the insertion hole (12) and is coaxially arranged with the insertion hole (12), the shortest distance between the end of the lifting wing (33) away from the lifting screw tube (32) and the central axis of the lifting screw (31) is greater than the shortest distance between the blocking column (13) and the central axis of the insertion hole (12); The top of the lifting screw rod (31) is provided with an integral hexagonal column (311); A force-bearing base (41) adapted to the insertion hole (12) is fixed to the bottom end of the lifting screw rod (31), and an anti-deflection rod (42) is provided on the side of the force-bearing base (41) away from the lifting screw rod (31); The force-bearing base (41) is an arc-shaped piece, and the opening side of the arc-shaped piece faces the lifting screw (31); One end of the anti-deflection rod (42) away from the force-bearing base (41) is a conical head; The length of the lifting screw (31) is 2-2.5 times the height of the embedded sleeve (1); When the embedded sleeve (1) is fixed on the building template, the embedded sleeve (1) is connected to the building template via a fixing piece, the fixing piece comprises an L-shaped fixed pull rod (21), a support rod of the fixed pull rod (21) is provided with a threaded wire, the support rod of the fixed pull rod (21) provided with the threaded wire passes through the building template from below the building template and extends into the embedded sleeve (1) and extends out from the insertion hole (12), one end of the fixed pull rod (21) extending out of the insertion hole (12) is sleeved with a reinforcing gasket (22) and is threadedly connected with a fixing nut (23), and a support rod of the fixed pull rod (21) away from the insertion hole (12) is pressed against the bottom surface of the building template; The construction method of the pre-buried hole pre-buried sleeve removal device comprises the following steps: Step 1: removing the fixing member arranged between the building template and the embedded sleeve (1); Step 2: adjusting the position of the lifting screw tube (32) on the lifting screw rod (31), and inserting the lifting screw rod (31) with the lifting screw tube (32) into the insertion hole (12), so that the lifting screw rod (31) and the insertion hole (12) are coaxially arranged, and the anti-deflection end below the lifting screw rod (31) is in contact with the building template, while keeping the lifting wing (33) between the blocking columns (13); Step 3: The lifting screw (31) is driven to rotate by an external tool. The lifting screw (31) drives the lifting wing (33) to abut against the blocking column (13) and deviate from the insertion hole (12) through the lifting screw tube (32). The lifting wing (33) is driven by the lifting screw (31) to rise and push the top cover (11) on the top of the embedded sleeve (1), so that the embedded sleeve (1) is separated from the embedded hole of the building component, and the removal of the embedded sleeve is completed.

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