A comprehensive construction method for protecting reserved holes in building slabs

Abstract

The present invention discloses a comprehensive construction method for protecting reserved holes in floor slabs of construction projects, comprising the following steps: step 1, making a ring-shaped steel formwork in advance; step 2, applying a release agent to the steel formwork and covering it with a layer of plastic film; step 3, installing a prefabricated steel reinforcement skeleton in the steel formwork; step 4, pouring concrete in the steel formwork; step 5, removing the in-situ prefabricated blocks after the concrete strength in the steel formwork reaches the required level; step 6, using the in-situ prefabricated blocks to temporarily protect the holes reserved on site; step 7, after the reserved holes are used up, blocking the holes. The present invention provides a comprehensive construction method for protecting reserved holes in floor slabs of construction projects, which solves the common quality problems of subsequent blocking of reserved holes in floor slabs, facilitates the blocking construction of reserved holes, reduces the process of setting up templates for reserved holes, and is used for temporary protection of reserved holes such as wire holes, ensuring that protective measures for reserved holes are in place and ensuring safety.

Description

Technical Field

[0001] The present invention relates to the technical field of construction engineering, and in particular to a comprehensive construction method for protecting reserved holes in construction engineering floor slabs. Background Art

[0002] During the construction process of a building project, in order to facilitate the transmission of cables and the installation of pump pipes, wire holes and reserved holes will be set on the structural floor. The quality of the later sealing and forming of the reserved holes is greatly affected by the construction technology and the formwork reinforcement method.

[0003] Currently, there are two commonly used methods for formwork reinforcement: 1. Formwork with water-stop screws or wires. This requires two people to implement and has poor sealing quality. The wires or screws are only used once, and after the formwork is removed, the wires rust and easily cause floor leakage, which is a common quality problem and makes rework difficult. 2. Formwork and square timber are used for top support. The formwork process is cumbersome, and because the formwork and square timbers will deform after repeated use, leakage and misalignment are prone to occur during the pouring process, resulting in poor forming results. Therefore, it is necessary to adopt convenient and stable formwork reinforcement measures to ensure the construction speed and forming quality of the reserved holes.

[0004] Currently, there are two commonly used temporary plugging protection measures for reserved holes: 1. A temporary protective cover made of wood and formwork. This protection measure is prone to displacement, loss, and other inadequate protection. 2. A protective cover made of square steel pipes and steel plates is fixed to the floor slab with anchor bolts, and the cover and square steel pipes are connected with hinges to form an openable reserved hole protection measure. This installation can easily damage the main structure, and the reserved hole still needs to be sealed with formwork for concrete pouring later. The sealing quality is difficult to control and the forming effect is poor. Therefore, it is necessary to adopt a convenient and stable reserved hole protection device to ensure the safe protection of the reserved hole.

[0005] The reserved holes in the existing floor slabs are supported by formwork, and protective measures are prone to being inadequate during use, and common quality problems in hole sealing are prone to occur in the later stage. Summary of the Invention

[0006] The purpose of the present invention is to reduce the process of supporting templates for reserved holes and speed up the construction progress; avoid the occurrence of common quality problems and ensure the quality of the later sealing construction of reserved holes; optimize the temporary protection measures for reserved holes and ensure the protection safety of temporary openings.

[0007] To this end, the technical solution adopted is that the present invention provides a comprehensive construction method for protecting reserved holes in building floor slabs, comprising the following steps:

[0008] Step 1: Prepare the annular steel formwork in advance according to the thickness of the floor slab and the size of the holes reserved on site;

[0009] Step 2: Apply a release agent on the inner wall of the prepared steel template. After the release agent is applied, a layer of plastic film is added to the surface of the steel template.

[0010] Step 3, installing the prefabricated steel frame in the steel formwork covered with plastic film;

[0011] Step 4: pouring concrete into the steel formwork to form an in-situ prefabricated reinforced concrete block;

[0012] Step 5: After the concrete strength in the steel formwork reaches the required level, remove the prefabricated blocks in situ;

[0013] Step 6: Place the prefabricated blocks back into the holes reserved on site to provide temporary protection for the holes reserved on site;

[0014] Step 7: After the holes reserved on site are used up, the holes reserved on site are sealed with in-situ prefabricated blocks.

[0015] Preferably, in step 1,

[0016] The annular shaped steel formwork is made into two circular rings of different diameters, with a 50mm wide horizontal ring in the middle. It is welded as a whole and used for supporting the reserved opening.

[0017] Preferably, in step 2,

[0018] A release agent is applied to the surface of the customized annular steel formwork through a coating component, and then a layer of plastic film is added to the customized annular steel formwork.

[0019] Preferably, in step 3,

[0020] The prefabricated block steel frame uses steel bars of the same specifications as the floor slab, Φ10 steel bars and other steel raw materials to produce bent steel bars, stirrups and straight bars, and the steel frame is made by tying them with steel wire.

[0021] Preferably, in step 4,

[0022] Concrete is poured into the steel formwork and the floor slab at the same time. The thickness of the concrete poured into the steel formwork is 3 / 4 of the thickness of the floor slab, forming in-situ reserved holes to seal the reinforced concrete prefabricated blocks.

[0023] Preferably, in step 5,

[0024] When the concrete strength of the prefabricated blocks in the steel formwork reaches the requirement, take out the in-situ prefabricated blocks and remove the shaped steel formwork. After cleaning the steel formwork, apply the release agent on the inner wall of the steel formwork again and cover it with a layer of plastic film. Then, the lower floor slab is put into construction and the in-situ prefabricated blocks are put back in place and maintained under the same conditions as the floor slab.

[0025] Preferably, in step 6,

[0026] When the reserved holes on site are in use, the in-situ prefabricated blocks are removed; when the reserved holes are not in use, the in-situ prefabricated blocks are placed to ensure the safety of the temporary hole protection.

[0027] Preferably, the on-site reserved hole plugging in step 7 includes the following steps:

[0028] S1: Roughen the inner wall around the reserved opening of the floor slab, and then clean and wash the inner wall around the reserved opening;

[0029] S2: Apply interface agent and cement paste to the inner walls around the cleaned reserved hole in sequence;

[0030] S3: Place the in-situ prefabricated block in the reserved hole after applying the interface agent and cement paste. The in-situ prefabricated block occupies 3 / 4 of the plate thickness at the bottom of the reserved hole.

[0031] S4: pour 1 / 4 slab thickness concrete on the upper part of the reserved hole;

[0032] S5: Sprinkle water on the concrete inside the reserved holes after pouring;

[0033] S6: After the construction is completed, when decorating the interior of the building, the bottom of the reserved holes in the floor slabs will be milled and plastered.

[0034] Preferably, the painting assembly comprises:

[0035] The U-shaped frame has an opening facing downwards and is arranged on the top of the workbench. A first electric cylinder is arranged on the top frame of the U-shaped frame. A driving motor is arranged downwards with the piston rod of the first electric cylinder. The output end of the driving motor faces downwards and is connected to the top of the vertically arranged transmission shaft. The bottom end of the transmission shaft passes through one end of the connecting plate and the axis of the sleeve in sequence and is slidingly connected to the sleeve. The other end of the connecting plate is connected to one side frame of the U-shaped frame. The sleeve is rotatably connected to the connecting plate. Both sides of the bottom end of the transmission shaft are rotatably connected with rocker rods, one end of the connecting rod is rotatably connected to the rocker rod, and the other end is rotatably connected to the sleeve. A mounting ring matching the steel template is provided on the top of the workbench, a telescopic rod coaxial with the first electric cylinder is provided at the center of the mounting ring, a fixing ring is provided on the top of the telescopic rod, a plurality of teeth are evenly distributed on the top of the fixing ring, and gears that mesh with the teeth are respectively provided on the two rocker rods.

[0036] Preferably, a liquid storage cavity is provided in the rocker arm, and a first infusion tube connected to the liquid storage cavity is provided at the end of the rocker arm away from the transmission shaft, the free end of the first infusion tube passes through the mounting plate and is connected to the first nozzle, a first driving pump is provided on the first infusion tube, and first bristles are provided on the side wall of the mounting plate close to the first nozzle, a plurality of second infusion tubes connected to the liquid storage cavity are arranged at intervals on the circumferential outer wall of the rocker arm, the free end of the second infusion tube is connected to the second nozzle, a second driving pump is provided on the second infusion tube, and a plurality of second bristles are evenly distributed on the circumferential outer wall of the rocker arm.

[0037] The technical solution of the present invention has the following advantages:

[0038] 1. Avoid the situation where conventional temporary opening protection is not in place;

[0039] 2. Avoid the occurrence of common quality problems after the reserved holes are blocked;

[0040] 3. The process of setting up formwork is reduced, and the construction progress of reserved holes is accelerated.

[0041] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purposes and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description, claims, and drawings.

[0042] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0044] Figure 1 1 is a process flow chart of the construction method of the present invention;

[0045] Figure 2 This is a physical diagram of the prior art of the present invention;

[0046] Figure 3 It is a plan view of the annular shaped steel template of the present invention;

[0047] Figure 4 This is a cross-sectional view of the annular shaped steel template of the present invention;

[0048] Figure 5 This is a schematic plan view of the steel reinforcement skeleton of the present invention;

[0049] Figure 6 AA is a cross-sectional schematic diagram of the steel bar skeleton of the present invention;

[0050] Figure 7 BB is a cross-sectional schematic diagram of the steel frame of the present invention;

[0051] Figure 8 This is a schematic diagram of the reserved hole sealing plan of the present invention;

[0052] Figure 9 This is a schematic diagram of the AA cross section of the reserved hole plugging of the present invention;

[0053] Figure 10This is a cross-sectional diagram of the reserved hole plugging BB of the present invention;

[0054] Figure 11 This is a schematic structural diagram of the painting assembly of the present invention;

[0055] Figure 12 This is an enlarged view of the painting component A of the present invention;

[0056] Figure 13 This is a schematic diagram of the cleaning component structure of the present invention;

[0057] Figure 14 This is an enlarged view of the cleaning component B of the present invention;

[0058] Among them, 1-steel template, 2-U-shaped frame, 3-first electric cylinder, 4-drive motor, 5-drive shaft, 6-sleeve, 7-connecting plate, 8-rocker, 9-connecting rod, 10-liquid storage chamber, 11-first infusion pipe, 12-mounting plate, 13-first nozzle, 14-first drive pump, 15-first brush, 16-second infusion pipe, 17-second nozzle, 18-second drive pump, 19-second brush, 20-workbench, 21-mounting ring, 22-telescopic Rod, 23-fixed ring, 24-teeth, 25-gear, 26-working frame, 27-mounting frame, 28-motor, 29-second electric cylinder, 30-fixed gear, 31-crank, 32-rectangular frame, 33-rotating drum, 34-rotating shaft, 35-first gear, 36-slide groove, 361-arc groove, 362-axial groove, 37-sleeve, 38-slider, 39-shovel head, 40-brush, 41-carrying frame, 42-housing, 43-spring. DETAILED DESCRIPTION

[0059] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention and are not used to limit the present invention.

[0060] It should be noted that when a component is referred to as being “fixed to” or “disposed on” another component, it can be directly on the other component or indirectly on the other component. When a component is referred to as being “connected to” another component, it can be directly or indirectly connected to the other component.

[0061] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0062] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0063] The embodiment of the present invention provides a comprehensive construction method for protecting reserved holes in building floor slabs, such as Figure 1-10 As shown, the following steps are included:

[0064] Step 1: Prepare a circular steel template 1 in advance according to the thickness of the floor slab and the size of the holes reserved on site;

[0065] Step 2: Apply a release agent to the inner wall of the prepared steel template 1, and after the release agent is applied, cover the surface of the steel template 1 with a layer of plastic film;

[0066] Step 3, installing the prefabricated steel frame in the steel formwork 1 covered with a plastic film;

[0067] Step 4: pouring concrete into the steel formwork 1 to form an in-situ prefabricated reinforced concrete block;

[0068] Step 5: After the concrete strength in the steel formwork 1 reaches the required level, remove the in-situ prefabricated blocks;

[0069] Step 6: Place the prefabricated blocks back into the holes reserved on site to provide temporary protection for the holes reserved on site;

[0070] Step 7: After the holes reserved on site are used up, the holes reserved on site are sealed with in-situ prefabricated blocks.

[0071] In step 1,

[0072] The annular shaped steel template 1 is made into two circular rings of different diameters, with a 50mm wide horizontal ring in the middle, and is welded as a whole for use in pre-reserved hole formwork.

[0073] In step 2,

[0074] A release agent is applied to the surface of the customized annular steel template 1 by a coating component, and then a layer of plastic film is added to the customized annular steel template 1 .

[0075] In step 3,

[0076] The prefabricated block steel frame uses steel bars of the same specifications as the floor slab, Φ10 steel bars and other steel raw materials to produce bent steel bars, stirrups and straight bars, and the steel frame is made by tying them with steel wire.

[0077] In step 4,

[0078] Concrete is poured into the steel formwork 1 and the floor slab at the same time. The thickness of the concrete poured into the steel formwork 1 is 3 / 4 of the thickness of the floor slab, forming an in-situ reserved hole to seal the reinforced concrete prefabricated block.

[0079] In step 5,

[0080] When the concrete strength of the prefabricated blocks in the steel formwork 1 reaches the requirement, take out the in-situ prefabricated blocks and remove the shaped steel formwork 1. After cleaning the steel formwork 1, apply the release agent on the inner wall of the steel formwork 1 again and cover it with a layer of plastic film. Then, the lower floor slab is put into construction and the in-situ prefabricated blocks are put back in place and maintained under the same conditions as the floor slab.

[0081] In step 6,

[0082] When the reserved holes on site are in use, the in-situ prefabricated blocks are removed; when the reserved holes are not in use, the in-situ prefabricated blocks are placed to ensure the safety of the temporary hole protection.

[0083] The on-site reserved hole sealing in step 7 includes the following steps:

[0084] S1: Roughen the inner wall around the reserved opening of the floor slab, and then clean and wash the inner wall around the reserved opening;

[0085] S2: Apply interface agent and cement paste to the inner walls around the cleaned reserved hole in sequence;

[0086] S3: Place the in-situ prefabricated block in the reserved hole after applying the interface agent and cement paste. The in-situ prefabricated block occupies 3 / 4 of the plate thickness at the bottom of the reserved hole.

[0087] S4: pour 1 / 4 slab thickness concrete on the upper part of the reserved hole;

[0088] S5: Sprinkle water on the concrete inside the reserved holes after pouring;

[0089] S6: After the construction is completed, when decorating the interior of the building, the bottom of the reserved holes in the floor slabs will be milled and plastered.

[0090] The working principle of the above technical solution is as follows: according to the thickness of the building floor and the size of the reserved holes on site, a ring-shaped steel formwork 1 is made in advance. The ring-shaped steel formwork 1 is made of 2mm thin steel plate and is used for supporting the reserved hole. The steel formwork 1 is made into two circular rings with different diameters, the lower ring is made into a circular trapezoid with an angle of 45°~60°, and a horizontal ring with a width of 50mm is made in the middle. The steel formwork 1 is welded as a whole; a layer of release agent is applied on the surface of the customized ring-shaped steel formwork 1 through a brushing component, and a layer of plastic film is added to the surface of the release agent. The ring-shaped steel formwork 1 is positioned and fixed according to the reserved holes, and a steel frame with the same specifications as the floor is built in. The concrete is poured at the same time as the floor. The thickness of the concrete poured in the steel formwork 1 is controlled at 3 / 4 of the plate Thick, forming a prefabricated reinforced concrete block to seal the reserved holes in situ; when the concrete strength reaches the requirement, the prefabricated blocks in situ are taken out in time and the fixed steel formwork 1 is removed, the fixed steel formwork 1 is cleaned and painted and then transferred to the lower floor construction for use, the prefabricated blocks in situ are put back in place and maintained under the same conditions as the floor, the prefabricated blocks in situ can be taken out when the reserved holes are in use, and can be placed in situ when the reserved holes are not in use to ensure the safety of temporary hole protection; when the reserved holes are sealed in the later stage, the original concrete surface of the reserved holes is roughened, cleaned, and painted with interface agent and cement slurry, and then the prefabricated blocks in situ are placed, and then the concrete pouring construction of the upper 1 / 4 slab thickness is carried out. After the construction is completed, when the interior of the building is decorated and renovated, the bottom of the reserved holes in the floor is milled and plastered.

[0091] The beneficial effects of the above technical solution are:

[0092] 1. Avoid the situation where conventional temporary opening protection is not in place;

[0093] 2. Avoid the occurrence of common quality problems after the reserved holes are blocked;

[0094] 3. The process of setting up formwork is reduced, and the construction progress of reserved holes is accelerated.

[0095] In one embodiment, Figure 11-12 As shown, the painting assembly includes:

[0096] The U-shaped frame 2 is arranged at the top of the workbench 20 with the opening facing downward. A first electric cylinder 3 is arranged on the top frame of the U-shaped frame 2. The piston rod of the first electric cylinder 3 is downwardly provided with a driving motor 4. The output end of the driving motor 4 is downwardly provided and connected to the top of the vertically arranged transmission shaft 5. The bottom end of the transmission shaft 5 passes through one end of the connecting plate 7 and the axis of the sleeve 6 in sequence and is slidably connected to the sleeve 6. The other end of the connecting plate 7 is connected to one side frame of the U-shaped frame 2, and the sleeve 6 is rotatably connected to the connecting plate 7. The two sides of the bottom end of the transmission shaft 5 are rotatably connected to the rocker rod 8, one end of the connecting rod 9 is rotatably connected to the rocker rod 8, and the other end is rotatably connected to the sleeve 6. A mounting ring 21 matching the steel template 1 is provided at the top of the workbench 20, and a telescopic rod 22 coaxial with the first electric cylinder 3 is provided at the center of the mounting ring 21. A fixing ring 23 is provided at the top of the telescopic rod 22, and a plurality of teeth 24 are evenly distributed on the top of the fixing ring 23. Gears 25 that mesh with the teeth 24 are respectively provided on the two rocker rods 8;

[0097] A liquid storage chamber 10 is provided in the rocker arm 8, and a first liquid infusion tube 11 connected to the liquid storage chamber 10 is provided at the end of the rocker arm 8 away from the transmission shaft 5, the free end of the first liquid infusion tube 11 passes through the mounting plate 12 and is connected to the first nozzle 13, a first driving pump 14 is provided on the first liquid infusion tube 11, and a first brush 15 is provided on the side wall of the mounting plate 12 close to the first nozzle 13, a plurality of second liquid infusion tubes 16 connected to the liquid storage chamber 10 are arranged at intervals on the circumferential outer wall of the rocker arm 8, the free end of the second liquid infusion tube 16 is connected to the second nozzle 17, a second driving pump 18 is provided on the second liquid infusion tube 16, and a plurality of second brushes 19 are evenly distributed on the circumferential outer wall of the rocker arm 8.

[0098] The working principle and beneficial effects of the above technical solution are as follows: when it is necessary to apply a release agent to the surface of the annular steel template 1, the telescopic rod 22 is started, the telescopic rod 22 is retracted, the teeth 24 are disengaged from the gear 25, and then the annular steel template 1 is mounted on the mounting ring 21 at the top of the workbench 20, the telescopic rod 22 is started, the teeth 24 are meshed with the gear 25, and when it is necessary to apply a release agent to the circular trapezoidal ring at the lower part of the steel template 1, the first electric cylinder 3 is started to drive the drive motor 4 and the transmission shaft 5 to move upward, so that the swing arm 8 swings downward around the connection between the swing arm 8 and the transmission shaft 5. When the ring is perpendicular to the trapezoidal ring, the first electric cylinder 3 is closed and the first driving pump 14 is started. The release agent in the liquid storage chamber 10 is pumped to the first nozzle 13 through the first liquid infusion pipe 11 for spraying. The first nozzle 13 sprays the release agent on the surface of the trapezoidal ring of the annular steel template 1. The driving motor 4 is started to drive the transmission shaft 5 to rotate, drive the rocker 8 and the connecting rod 9 to rotate around the transmission shaft 5, and drive the gear 25 to rotate around the transmission shaft 5. Through the meshing transmission between the gear 25 and the teeth 24, the gear 25 and the rocker 8 rotate around the transmission shaft 5 while rotating, driving the first nozzle 13 and the rocker 8 to rotate around the transmission shaft 5. The first brush 15 rotates around the transmission shaft 5 while rotating on its own, and the first nozzle 13 sprays the release agent on the surface of the trapezoidal ring at a uniform speed. The first brush 15 evenly applies the release agent sprayed by the first nozzle 13 to ensure that the release agent covers the entire area. When it is necessary to apply the release agent to the horizontal ring and the vertical inner wall in the middle of the steel template 1, the first electric cylinder 3 is started to drive the drive motor 4 and the transmission shaft 5 to move downward, drive the two connecting rods 9 to swing around the connection between them and the sleeve 6, and drive the two rocker arms 8 to swing upward around the connection between them and the transmission shaft 5. When the rocker arms 8 are in a horizontal state, the first electric cylinder 3 is closed. , then start the second driving pump 18, the release agent in the liquid storage chamber 10 is pumped to the second nozzle 17 through the second infusion tube 16 for spraying, the first nozzle 13 rotates while rotating around the transmission shaft 5 to spray the release agent on the vertical inner wall of the steel template 1, the second nozzle 17 rotates while rotating around the transmission shaft 5 to spray the release agent on the horizontal ring in the middle of the steel template 1, the first brush 15 and the second brush 19 evenly apply the release agent sprayed by the nozzle, the spraying efficiency of the brushing component is high, the release agent is evenly applied, the release agent application efficiency is improved, and the prefabricated block production efficiency and production quality are improved.

[0099] In one embodiment, Figure 13 As shown, in step 1, after the steel template 1 is welded, the weld of the steel template 1 is cleaned by a cleaning component, and the cleaning component includes:

[0100] A working frame 26 is provided with a U-shaped mounting frame 27 with an opening facing downward at the top of the working frame 26, and a second electric cylinder 29 is provided on the inner wall of the top of the mounting frame 27. A motor 28 is provided with a piston rod of the second electric cylinder 29 facing downward, and the output shaft of the motor 28 passes downward through the axis of the fixed gear 30 and is connected to one end of the crank 31. The output shaft of the motor 28 is rotatably connected to the fixed gear 30, and the fixed gear 30 is fixedly connected to the motor 28. A rectangular frame 32 is rotatably connected inside the U-shaped mounting frame 27, and a rotating drum 33 is rotatably connected inside the rectangular frame 32. The connecting axis of the rectangular frame 32 and the U-shaped mounting frame 27 and the connecting axis of the rectangular frame 32 and the rotating drum 33 are perpendicular to each other. A rotating shaft 34 is rotatably connected to the other end of the crank 31. One end of the rotating shaft 34 passes through the crank 31 and is connected to the first gear 35. The first gear 35 is meshed with the fixed gear 30, and the other end of the rotating shaft 34 passes through the axis of the rotating drum 33 and is rotatably connected to the rotating drum 33;

[0101] The end of the rotating drum 33 away from the crank 31 is provided with a shell 42, and the other end of the rotating shaft 34 extends into the shell 42. A slide groove 36 is provided on the circumferential outer wall of the other end of the rotating shaft 34. The slide groove 36 consists of two arc grooves 361 and two axial grooves 362 connected end to end in sequence. A sleeve 37 is slidably provided in the shell 42, and the sleeve 37 is sleeved on the rotating shaft 34. A slider 38 is provided on the inner wall of the sleeve 37, and the slider 38 can reciprocate in the slide groove 36. The free end of the sleeve 37 extends out of the shell 42 and is connected to the shovel head 39. A sweeping brush 40 is provided at the end of the shell 42 away from the rotating shaft 34, and the shovel head 39 is located at the center of the sweeping brush 40. A spring 43 is provided in the sleeve 37. One end of the spring 43 is connected to the inner wall of the sleeve 37 on one side away from the rotating shaft 34, and the other end is rotatably connected to the rotating shaft 34. A supporting frame 41 coaxial with the second electric cylinder 29 is provided at the top of the working frame 26.

[0102] The working principle and beneficial effects of the above technical solution are as follows: when the welding of the steel template 1 is completed, the steel template 1 is placed on the top of the carrier 41, the second electric cylinder 29 is started, and the motor 28 is driven to move downward, so that the rotating shaft 34 and the rotating drum 33 swing around the connection between the rotating drum 33 and the rectangular frame 32, and the position of the shovel head 39 is adjusted. When the shovel head 39 is adjusted to the weld of the annular shaped steel template 1, the motor 28 is started, the crank 31 is driven to rotate, and the first gear 35 is driven to rotate around the output shaft of the motor 28. The gear meshing transmission between the first gear 35 and the fixed gear 30 drives the first gear 35 to rotate. Through the composite superposition of motions, the first gear 35 rotates while rotating around the output shaft of the motor 28, driving the rotating shaft 34 to rotate while rotating around the output shaft of the motor 28, so that the rotating drum 33 swings around the connection between it and the rectangular frame 32, so that the rectangular frame 32 swings around the connection between it and the U-shaped The sweeping brush 40 sweeps the welding slag scraped by the shovel head 39 out of the annular fixed steel formwork 1, ensuring that the annular fixed steel formwork 1 is clean. At the same time, the sweeping brush 40 is arranged around the shovel head 39 to prevent the slag from splashing when the shovel head 39 scrapes off the welding slag, thereby avoiding injury to workers and improving the safety of the cleaning component.

[0103] Obviously, those skilled in the art may make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if such changes and modifications fall within the scope of the claims and their equivalents, the present invention is intended to include such changes and modifications.

Claims

1. A comprehensive construction method for protecting reserved holes in building floor slabs, characterized in that: The following steps are involved: Step 1: Prepare a circular steel template (1) in advance according to the thickness of the floor slab and the size of the holes reserved on site; Step 2: Apply a release agent to the inner wall of the prepared steel template (1), and after the release agent is applied, cover the surface of the steel template (1) with a layer of plastic film; Step 3, installing the prefabricated steel frame in the steel formwork (1) covered with a plastic film; Step 4, pouring concrete into the steel formwork (1) to form an in-situ prefabricated reinforced concrete block; Step 5, after the concrete strength in the steel formwork (1) reaches the required level, remove the in-situ prefabricated blocks; Step 6: Place the prefabricated blocks back into the holes reserved on site to provide temporary protection for the holes reserved on site; Step 7: After the holes reserved on site are used up, the holes reserved on site are sealed with in-situ prefabricated blocks; In step 2, a release agent is applied to the surface of the customized annular steel template (1) by a coating component, and then a layer of plastic film is added to the customized annular steel template (1); The painting assembly comprises: a U-shaped frame (2), the U-shaped frame (2) is arranged on the top of a workbench (20) with its opening facing downward, a first electric cylinder (3) is arranged on the top frame of the U-shaped frame (2), a driving motor (4) is arranged with the piston rod of the first electric cylinder (3) facing downward, the output end of the driving motor (4) faces downward and is connected to the top of a vertically arranged transmission shaft (5), the bottom end of the transmission shaft (5) passes through one end of a connecting plate (7) and the axis of a sleeve (6) in sequence, and is slidably connected to the sleeve (6), the other end of the connecting plate (7) is connected to a side frame of the U-shaped frame (2), and the sleeve (6) is rotatably connected to the connecting plate (7). The bottom end of the transmission shaft (5) is rotatably connected to a swing rod (8) on both sides, one end of the connecting rod (9) is rotatably connected to the swing rod (8), and the other end is rotatably connected to the sleeve (6). The top of the workbench (20) is provided with a mounting ring (21) that matches the steel template (1), and a telescopic rod (22) coaxial with the first electric cylinder (3) is provided at the center of the mounting ring (21). A fixing ring (23) is provided at the top of the telescopic rod (22), and a plurality of teeth (24) are evenly distributed on the top of the fixing ring (23). Gears (25) that mesh with the teeth (24) are respectively provided on the two swing rods (8); A liquid storage chamber (10) is provided in the swing arm (8), a first liquid infusion tube (11) communicating with the liquid storage chamber (10) is provided at one end of the swing arm (8) away from the transmission shaft (5), a free end of the first liquid infusion tube (11) passes through the mounting plate (12) and communicates with the first nozzle (13), a first driving pump (14) is provided on the first liquid infusion tube (11), a first brush (15) is provided on a side wall of the mounting plate (12) close to the first nozzle (13), a plurality of second liquid infusion tubes (16) communicating with the liquid storage chamber (10) are provided at intervals on the circumferential outer wall of the swing arm (8), a free end of the second liquid infusion tube (16) is communicated with the second nozzle (17), a second driving pump (18) is provided on the second liquid infusion tube (16), and a plurality of second brushes (19) are evenly distributed on the circumferential outer wall of the swing arm (8).

2. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: In step 1, The annular shaped steel template (1) is made into two circular rings with different diameters, with a horizontal ring with a width of 50 mm in the middle, and is welded as a whole for use in pre-reserving the hole formwork.

3. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: In step 3, The prefabricated block steel frame uses steel bars of the same specifications as the floor slab, Φ10 steel bars and other steel raw materials to produce bent steel bars, stirrups and straight bars, and the steel frame is made by tying them with steel wire.

4. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: In step 4, Concrete is poured into the steel formwork (1) and the floor slab simultaneously. The thickness of the concrete poured into the steel formwork (1) is 3 / 4 of the thickness of the floor slab, forming an in-situ reserved hole to seal the reinforced concrete prefabricated block.

5. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: In step 5, When the concrete strength of the precast blocks in the steel formwork (1) reaches the required level, the in-situ precast blocks are taken out and the shaped steel formwork (1) is removed. After cleaning the steel formwork (1), the inner wall of the steel formwork (1) is again coated with a release agent and covered with a layer of plastic film. The steel formwork (1) is then used for construction of the lower floor slab, and the in-situ precast blocks are returned to their original positions and maintained under the same conditions as the floor slab.

6. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: In step 6, When the reserved holes on site are in use, the in-situ prefabricated blocks are removed; when the reserved holes are not in use, the in-situ prefabricated blocks are placed to ensure the safety of the temporary hole protection.

7. A comprehensive construction method for protecting reserved holes in building slabs according to claim 1, characterized in that: The on-site reserved hole sealing in step 7 includes the following steps: S1: Roughen the inner wall around the reserved opening of the floor slab, and then clean and wash the inner wall around the reserved opening; S2: Apply interface agent and cement paste to the inner walls around the cleaned reserved hole in sequence; S3: Place the in-situ prefabricated block in the reserved hole after applying the interface agent and cement paste. The in-situ prefabricated block occupies 3 / 4 of the plate thickness at the bottom of the reserved hole. S4: pour 1 / 4 slab thickness concrete on the upper part of the reserved hole; S5: Sprinkle water on the concrete inside the reserved holes after pouring; S6: After the construction is completed, when decorating the interior of the building, the bottom of the reserved holes in the floor slabs will be milled and plastered.

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