Prefabricated building preformed hole grouting auxiliary device and construction method

Abstract

The invention provides a prefabricated building preformed hole grouting auxiliary device and a construction method. The device comprises a fixing ring, and a rotating rod is arranged on the fixing ring; the supporting bottom plate and the rotating rod are located on the two sides of the fixing ring respectively; the hollow shaft is fixedly connected with the supporting bottom plate, and a sling which penetrates through the fixing ring and is connected with the rotating rod is arranged in the hollow shaft; wherein the rotating rod can rotate around the hollow shaft to drive the sling to be self-wound, or the rotating rod is fixed by a positioning pin on the fixing ring. According to the method, the tedious procedures of erecting a lower supporting plate and a lower supporting frame on the floor below the preformed hole and the like can be omitted, the construction operation is simplified, and the construction efficiency is improved; and after the first concrete plugging layer is solidified, the device is easy to dismantle and can be repeatedly used, and the cost is saved.

Description

Technical Field

[0001] The present invention relates to the technical field of building construction, and in particular to an auxiliary device for grouting pre-set holes in assembled buildings and a construction method thereof. Background Art

[0002] When constructing prefabricated buildings, holes are often reserved on the floor slabs to facilitate the installation of pipes or equipment at a later stage. After the construction is completed, the reserved holes on some of the floor slabs will be sealed.

[0003] Currently, during plugging construction, the reserved hole wall is usually roughened first, then rebar is planted in the hole wall, and finally a lower support plate and lower support frame are set up on the floor below the reserved hole to plug the reserved hole, and then pouring construction is carried out. However, the process of setting up the lower support plate and lower support frame on the floor below the reserved hole is very cumbersome and difficult to disassemble after construction is completed. Summary of the Invention

[0004] The purpose of the present invention is to provide a prefabricated building reserved hole grouting auxiliary device and construction method to solve the deficiencies in the above-mentioned background technology.

[0005] The technical solution of the present invention is: an auxiliary device for grouting pre-holes in assembled buildings, which comprises:

[0006] A fixed ring, wherein a rotating rod is provided on the fixed ring;

[0007] a supporting base plate, wherein the supporting base plate and the rotating rod are respectively located on two sides of the fixing ring;

[0008] a hollow shaft, the hollow shaft being fixedly connected to the supporting base plate, and having a sling disposed therein that passes through the fixing ring and is connected to the rotating rod;

[0009] The rotating rod can rotate around the hollow shaft to drive the sling to wind itself, or be fixed by the positioning pin on the fixing ring.

[0010] Furthermore, an annular groove is formed on the top of the fixing ring, the annular groove is coaxially distributed with the hollow shaft, and both ends of the rotating rod are respectively connected to rollers located in the annular groove.

[0011] Furthermore, both ends of the rotating rod are respectively provided with detachable wheel seats, and the roller is placed in the wheel seats.

[0012] Furthermore, a rotating handle is provided on the top of the rotating rod.

[0013] Furthermore, the fixing ring is provided with positioning holes dispersed along the circumference of the annular groove, and at least one positioning pin inserted into the positioning hole is respectively provided on both radial sides of the rotating rod.

[0014] Furthermore, side ears are arranged on the outer periphery of the fixing ring, and the bottom surface of the side ears is flush with the bottom surface of the fixing ring.

[0015] Furthermore, a diameter-reducing groove is arranged in the middle of the rotating rod; the sling is annular and is sleeved outside the diameter-reducing groove.

[0016] Furthermore, a concrete release agent layer is arranged on the outer wall of the hollow shaft.

[0017] The technical solution of the present invention also includes: a construction method using the above-mentioned prefabricated building reserved hole grouting auxiliary device, which includes the steps of:

[0018] Place the fixing ring and the supporting base plate on the top and bottom sides of the reserved hole respectively, and use a sling to connect the rotating rod to the supporting base plate;

[0019] Rotate the rotating rod to drive the sling to wind itself until the fixed ring and the supporting base plate are pressed against the floor slab respectively;

[0020] Pour the concrete sealing layer into the reserved holes.

[0021] Furthermore, the concrete sealing layer includes at least a first concrete sealing layer and a second concrete sealing layer. The second concrete sealing layer is poured on the top of the first concrete sealing layer after the grouting auxiliary device is removed; the top surface of the first concrete sealing layer is lower than the top surface of the hollow shaft, and is provided with a sealing plate for sealing the holes left after the grouting auxiliary device is removed.

[0022] The present invention has the following beneficial effects: the device and construction method can eliminate the tedious process of setting up a lower support plate and lower support frame on the floor below the reserved hole, simplifying construction operations and improving construction efficiency. Furthermore, after the first concrete sealing layer solidifies, the device can be easily removed and reused, thus saving costs. The multi-layer pouring scheme can reduce the pressure of the first concrete sealing layer on the supporting base plate, preventing concrete leakage during pouring. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a construction process diagram of an embodiment of the present invention;

[0024] Figure 2 is a top view of the fixed ring and the rotating rod in an embodiment of the present invention;

[0025] Figure 3 Schematic diagram of the connection between the rotating rod, the sling and the roller in an embodiment of the present invention;

[0026] Figure 4 Schematic diagram of the connection between the support base plate and the hollow shaft in an embodiment of the present invention.

[0027] In the picture:

[0028] 1. Fixing ring; 1.1. Annular groove; 1.2. Positioning hole;

[0029] 2. Rotating rod; 2.1. Reducing groove;

[0030] 3. Support the bottom plate;

[0031] 4. Hollow shaft;

[0032] 5. Sling;

[0033] 6. Positioning pin;

[0034] 7. Reserved holes;

[0035] 8. The first concrete sealing layer;

[0036] 9. Second concrete sealing layer;

[0037] 10. Sealing plate;

[0038] 11. Wheel seat;

[0039] 12. Roller;

[0040] 13. Rotating handle;

[0041] 14. Listen to your ears. DETAILED DESCRIPTION

[0042] The technical solutions of the embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0043] In the description of the embodiments of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In the description of the present invention, it should be noted that, unless otherwise clearly stipulated and limited, the terms "setting" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, or it can be a communication between the internal parts of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0044] Reference Attachment Figure 1-4The present embodiment provides an auxiliary device for grouting the reserved holes 7 of an assembled building and a construction method thereof. The structure of the auxiliary device comprises: a fixed ring 1, a rotating rod 2, a supporting base plate 3, a hollow shaft 4, a sling 5 and a positioning pin 6. The rotating rod 2 is horizontally arranged on the top of the fixed ring 1 and is rotatably connected to the fixed ring 1, and its rotating shaft is the axis of the fixed ring 1; the supporting base plate 3 is located below the fixed ring 1, and the top surface of the supporting base plate 3 is fixedly connected to the hollow shaft 4 and the sling 5. The sling 5 is located inside the hollow shaft 4, and the top end of the sling 5 passes through the fixed ring 1 and is connected to the rotating rod 2; the positioning pin 6 is arranged on the fixed ring 1, and is used to fix the rotating rod 2 after the rotating rod 2 is rotated into place; when the rotating rod 2 rotates, it can drive the sling 5 to self-wind, thereby reducing the distance between the fixed ring 1 and the supporting base plate 3.

[0045] When using the above-mentioned device for construction: first, place the fixing ring 1 and the supporting base plate 3 on the top and bottom sides of the reserved hole 7 respectively, and use the sling 5 to connect the rotating rod 2 and the supporting base plate 3; then rotate the rotating rod 2 to drive the sling 5 to self-wind until the fixing ring 1 and the supporting base plate 3 are respectively pressed against the floor slab; then pour the concrete sealing layer of the reserved hole 7.

[0046] To facilitate demoulding, the concrete sealing layer is poured in at least two steps. First, when the supporting base plate 3 seals the reserved hole 7, the first concrete sealing layer 8 is poured. It should be noted that the top surface of the first concrete sealing layer 8 must not exceed the top surface of the hollow shaft 4 to prevent the slurry from entering the hollow shaft 4 and affecting the turnover of the device; after the first concrete sealing layer 8 solidifies, the device is removed, and a sealing plate 10 is placed on the top surface of the first concrete sealing layer 8. The sealing plate 10 is used to seal the holes left after the hollow shaft 4 is removed, and then the concrete sealing layer of the reserved hole 7 is continued to be poured on the top of the first concrete sealing layer 8, such as the second concrete sealing layer 9, the third concrete sealing layer... until the top surface elevation of the concrete sealing layer meets the requirements.

[0047] Of course, the sealing plate 10 can be replaced by the following solution: fill the hole left after the hollow shaft 4 is removed with a water-soluble polyurethane plugging agent. The water-soluble polyurethane plugging agent disperses, emulsifies, and foams when it comes into contact with water, and immediately undergoes a chemical reaction to form an impermeable elastic colloidal solid body, which can also prevent subsequent concrete from leaking from the above-mentioned holes.

[0048] The roughening and rebar planting processes of the reserved holes 7 are existing technologies and do not affect the use and construction of the present device, so they will not be described in detail; the sealing plate 10 used to seal the hole left after the hollow shaft 4 is removed can be welded and fixed to the steel bars in the reserved holes 7, and its operation is also well known to those skilled in the art, so it will not be described in detail.

[0049] This technical solution eliminates the tedious process of setting up a lower support plate and lower support frame on the floor below the reserved hole 7, simplifying construction operations and improving construction efficiency. Furthermore, after the first concrete sealing layer 8 solidifies, the device can be easily removed and reused, saving costs. The multi-layer pouring solution reduces the pressure of the first concrete sealing layer 8 on the supporting base plate 3, preventing concrete leakage during pouring.

[0050] To facilitate demolding, a concrete release agent layer can be constructed on the outer wall of the hollow shaft 4. Specifically, before the first concrete sealing layer 8 is poured, the concrete release agent is evenly applied to the outer wall of the hollow shaft 4. The concrete release agent layer separates the hollow shaft 4 from the first concrete sealing layer 8. After the first concrete sealing layer 8 solidifies, the sling 5 is removed from the rotating rod 2, and the supporting base plate 3 or the hollow shaft 4 is tapped lightly. The supporting base plate 3, the hollow shaft 4 and the sling 5 can be pulled out and removed from under the first concrete sealing layer 8.

[0051] Specifically, an annular groove 1.1 is provided at the top of the fixing ring 1, and the annular groove 1.1 is coaxial with the fixing ring 1. Removable wheel seats 11 are respectively provided at both ends of the rotating rod 2, and a roller 12 is provided in the wheel seat 11. The bottom of the roller 12 is placed in the annular groove 1.1, and a rotating handle 13 is provided at the top of the rotating rod 2. By holding the rotating handle 13 and applying force, the force can be transmitted to the roller 12 through the rotating rod 2. Since the roller 12 is limited by the annular groove 1.1, the roller 12 can only roll along the contour of the annular groove 1.1, thereby driving the rotating rod 2 to rotate around the axis of the fixing ring 1.

[0052] The two sets of rollers 12 ensure the stability and smooth rotation of the rotating rod 2. The cooperation between the annular groove 1.1 and the rollers 12 allows the rotating rod 2 to rotate smoothly, thereby causing the sling 5 to self-wind, improving construction efficiency and device stability. The removable wheel seat 11 facilitates the installation and removal of the rollers 12 and rotating rod 2, simplifying the assembly process and improving the device's efficiency and ease of maintenance.

[0053] The components of this device can all be taken from the construction site and manufactured according to specific construction requirements. In some better implementation cases, the hollow shaft 4 is constructed in the center of the supporting base plate 3, and the axis of the fixing ring 1 is coincided with the axis of the hollow shaft 4 during the pouring construction. When the sling 5 is wrapped around the fixing ring 1 and the supporting base plate 3 is pressed against the floor slab respectively, the rotating rod 2 is fixed. At this time, the distance between the top and bottom ends of the sling 5 is the smallest, which is the thickness of the floor slab. The supporting base plate 3 can be effectively fixed to the bottom surface of the floor slab to prevent leakage.

[0054] Furthermore, the top surface of the fixed ring 1 is provided with a plurality of positioning holes 1.2 dispersed circumferentially along the annular groove 1.1. At least one positioning pin 6 is provided on each radial side of the rotating rod 2, inserted into one of the positioning holes 1.2. To adjust the length of the sling 5, the positioning pin 6 is removed, and force is applied to the rotating rod 2, causing the sling 5 to self-wind. Once the fixed ring 1 and the supporting base plate 3 are firmly against the floor, the positioning pin 6 is installed on each radial side of the rotating rod 2, locking the rotating ring in place and preventing it from rotating, thereby fixing the length of the sling 5.

[0055] To facilitate installation, this embodiment features side ears 14 on the outer periphery of the fixing ring 1. The bottom surface of the side ears 14 is flush with the bottom surface of the fixing ring 1. The purpose of the side ears 14 is to restrict the movement of the fixing ring 1 by stepping on them when adjusting the length of the sling 5. Furthermore, because the side ears 14 are located outside the annular groove 1.1, the smooth movement of the rotating rod 2 is not affected as long as the length of the rotating rod 2 is appropriate and the position of the foot is appropriate.

[0056] After the fixing ring 1 and the supporting base plate 3 are fixed, when pouring the first concrete sealing layer 8, the slurry is slowly poured downward from the central hole of the fixing ring 1. The disturbance of the slurry to the device is mainly in the vertical direction, and there is friction between the fixing ring 1 and the supporting base plate 3 and the floor slab. The interval between the top and bottom ends of the sling 5 is the thickness of the floor slab. If the fixing ring 1 and the supporting base plate 3 are to undergo horizontal displacement, it can only be horizontal displacement at the same time, in the same direction, and to the same extent. Therefore, even if the slurry produces a slight horizontal disturbance to the device, under the synergistic effect of the above-mentioned sling 5, friction and other factors, the device will not produce excessive horizontal displacement, and the risk of leakage caused by the above-mentioned slight horizontal displacement can be avoided by using a large-sized supporting base plate 3, thereby effectively avoiding leakage.

[0057] In order to facilitate the installation, removal and positioning of the sling 5, this embodiment has a reduced diameter groove 2.1 in the middle of the rotating rod 2, and the radius of the reduced diameter groove 2.1 is smaller than the radius of other parts of the rotating rod 2; the sling 5 is annular and is sleeved outside the reduced diameter groove 2.1. It can be limited by the reduced diameter groove 2.1, and when removing the mold, the sling 5 can be loosened by first rotating the rotating rod 2 in the opposite direction, and then the rotating rod 2 is lifted to disengage the roller 12 from the annular groove 1.1. Finally, the rotating rod 2 is pulled out horizontally and separated from the sling 5 to ensure smooth construction.

[0058] The sling 5 and the supporting base plate 3 can be welded, or a sling hole can be opened on the supporting base plate 3, the sling hole being located inside the central axis, and the bottom end of the sling 5 being installed and fixed at the sling hole. Since the sling hole is located inside the central axis, no slurry leakage accident will occur.

[0059] Compared with the existing technology, the present invention has the following advantages: the above-mentioned device and construction method can eliminate the tedious process of setting up the lower support plate and lower support frame on the floor below the reserved hole 7, simplifying the construction operation and improving construction efficiency. Moreover, after the first concrete sealing layer 8 solidifies, the device can be easily removed and reused, thus saving costs. The multi-layer pouring scheme can reduce the pressure of the first concrete sealing layer 8 on the supporting base plate 3, preventing concrete leakage during the pouring process.

[0060] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. An auxiliary grouting device for pre-installed building holes, characterized in that: include: A fixed ring, wherein a rotating rod is provided on the fixed ring; a supporting base plate, wherein the supporting base plate and the rotating rod are respectively located on two sides of the fixing ring; a hollow shaft, the hollow shaft being fixedly connected to the supporting base plate, and having a sling disposed therein that passes through the fixing ring and is connected to the rotating rod; The rotating rod can rotate around the hollow shaft to drive the sling to wind itself, or be fixed by the positioning pin on the fixing ring.

2. The prefabricated building reserved hole grouting auxiliary device according to claim 1, characterized in that: An annular groove is formed on the top of the fixing ring, and the annular groove is coaxially distributed with the hollow shaft. Both ends of the rotating rod are respectively connected to rollers located in the annular groove.

3. The prefabricated building reserved hole grouting auxiliary device according to claim 2, characterized in that: Both ends of the rotating rod are respectively provided with detachable wheel seats, and the rollers are arranged in the wheel seats.

4. The prefabricated building reserved hole grouting auxiliary device according to claim 2, characterized in that: A rotating handle is provided on the top of the rotating rod.

5. The prefabricated building reserved hole grouting auxiliary device according to any one of claims 2 to 4, characterized in that: The fixing ring is provided with positioning holes dispersed along the circumference of the annular groove, and at least one positioning pin inserted into the positioning hole is respectively provided on both radial sides of the rotating rod.

6. The prefabricated building reserved hole grouting auxiliary device according to claim 5, characterized in that: The outer periphery of the fixing ring is provided with side ears, and the bottom surface of the side ears is flush with the bottom surface of the fixing ring.

7. The prefabricated building reserved hole grouting auxiliary device according to any one of claims 1-4 and 6, characterized in that: A diameter-reducing groove is arranged in the middle of the rotating rod; the sling is annular and sleeved outside the diameter-reducing groove.

8. The prefabricated building reserved hole grouting auxiliary device according to claim 7, characterized in that: A concrete release agent layer is arranged on the outer wall of the hollow shaft.

9. A construction method using the prefabricated building reserved hole grouting auxiliary device according to any one of claims 1 to 8, characterized in that: Including steps: Place the fixing ring and the supporting base plate on the top and bottom sides of the reserved hole respectively, and use a sling to connect the rotating rod to the supporting base plate; Rotate the rotating rod to drive the sling to wind itself until the fixed ring and the supporting base plate are pressed against the floor slab respectively; Pour the concrete sealing layer into the reserved holes.

10. The construction method using the prefabricated building reserved hole grouting auxiliary device according to claim 9, characterized in that: The concrete sealing layer includes at least a first concrete sealing layer and a second concrete sealing layer. The second concrete sealing layer is poured on the top of the first concrete sealing layer after the grouting auxiliary device is removed; the top surface of the first concrete sealing layer is lower than the top surface of the hollow shaft, and is provided with a sealing plate for sealing the holes left after the grouting auxiliary device is removed.

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