Hole reserving tool for cast-in-place concrete floor

Abstract

The utility model relates to a hole reserving tool for a cast-in-place concrete floor. The hole reserving tool comprises a cylinder body, a positioning connecting rod and a fixed pressing plate, a center hole is formed in the template, a through hole is formed in the middle of the fixed pressing plate, the positioning connecting rod penetrates through the center hole in the template, the cylinder and the through hole in the fixed pressing plate, the bottom of the positioning connecting rod is rotationally connected with a rotary fixing rod through a pin shaft, and the rotary fixing rod is tightly attached to the bottom face of the template in the using process. The top end of the positioning connecting rod is connected with a butterfly nut in a screwed mode, and the butterfly nut tightly presses the fixed pressing plate and the barrel. The floor preformed hole mold overcomes the defects that a conventional floor preformed hole mold is unstable in fixation and prone to deformation or deflection in the pouring process, can guarantee accurate hole positioning, is simple in structure and convenient to install and operate and can be repeatedly used, the rotary fixing rod structure is arranged, disassembly and assembly of the mold are more convenient, and production efficiency is improved. The working efficiency is effectively improved and the construction cost is reduced while the quality of the reserved hole is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a tool for pre-reserving holes in cast-in-place concrete floor slabs. Background Art

[0002] In building construction, in order to meet the needs of water, electricity and other installation projects and various construction measures, the retention of floor reserved holes is an indispensable construction process. When making floor reserved holes in the existing technology, a direct pre-embedding method of pre-embedding a wooden box or an iron box is often adopted. These molds are difficult to position and fix, and are prone to deviation and tilt during concrete pouring, which directly affects the later water and electricity pipe laying and installation. The visual quality is poor after demolding, and most of them are disposable molds that cannot be reused, increasing construction costs. Utility Model Content

[0003] The utility model aims to solve the deficiencies of the prior art and provides a tool for pre-setting holes in cast-in-place concrete floor slabs.

[0004] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a tool for pre-reserving holes in cast-in-place concrete slabs, comprising: a cylinder, a positioning connecting rod and a fixed pressure plate; a center hole is provided on the template, the cylinder is placed on the template, the cylinder is a steel pipe with upper and lower openings, the fixed pressure plate is placed on the top of the cylinder, the fixed pressure plate is an angle steel, a through hole is provided in the middle of the fixed pressure plate, the positioning connecting rod passes through the center hole on the template, the cylinder and the through holes on the fixed pressure plate, the positioning connecting rod is a screw rod, the bottom of the positioning connecting rod is rotatably connected to a rotating fixing rod through a pin shaft, when in use, the rotating fixing rod is tightly against the bottom surface of the template, a butterfly nut is screwed on the top of the positioning connecting rod, and the butterfly nut presses the fixed pressure plate and the cylinder tightly.

[0005] Furthermore, the outer diameter of the cylinder is consistent with the diameter of the designed hole, the length of the cylinder is 3-5 cm more than the thickness of the designed floor, the wall thickness of the cylinder is 2-3 cm, and an arc-shaped cross-barrel handle is welded on the top of the cylinder.

[0006] Furthermore, the length of the positioning connecting rod is 5 cm longer than the length of the cylinder, and a groove for accommodating the rotating fixing rod is provided at the bottom of the positioning connecting rod. The rotating fixing rod has different lengths on both sides with the pin as the center.

[0007] Furthermore, the top of the positioning connecting rod is a flat head, and the length of the flat head is 2 cm.

[0008] Furthermore, limit clips are welded on both sides of the bottom of the fixed pressure plate, the distance from the outer side of the limit clip to the center of the through hole of the fixed pressure plate is equal to the inner radius of the cylinder, and the height of the limit clip is 2 cm.

[0009] Furthermore, a gasket is sleeved on the top end of the positioning connecting rod, and the gasket is placed between the butterfly nut and the fixed pressure plate.

[0010] Furthermore, the positioning connecting rod is a steel bar with a diameter of 14 mm, and the rotating fixing rod is a steel bar with a diameter of 8 mm.

[0011] Furthermore, the width of the fixed pressure plate is 30 mm, and the diameter of the through hole of the fixed pressure plate is 2 mm larger than the diameter of the positioning connecting rod.

[0012] The beneficial effects of the utility model are as follows: the utility model adopts a perforated pull-type pressing plate to press the reserved cylinder, which overcomes the defects of the conventional floor reserved hole mold being unstable and prone to deformation or skewness during the pouring process, and can ensure accurate hole positioning, simple structure, convenient installation and operation, and can be repeatedly used. The rotating fixing rod structure is set to facilitate the disassembly and assembly of the mold, ensure the quality of the reserved holes, effectively improve work efficiency, and reduce construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural schematic diagram of the positioning connecting rod and the rotating fixing rod;

[0015] In the figure: 1- cylinder; 2- positioning connecting rod; 3- fixed pressure plate; 4- template; 5- rotating fixing rod; 6- butterfly nut; 7- arc-shaped cross-barrel handle; 8- flat head; 9- limit card; 10- gasket;

[0016] The drawings in this utility model are all schematic diagrams, and their sizes do not represent actual sizes;

[0017] The following is a detailed description of the embodiments of the present invention with reference to the accompanying drawings. DETAILED DESCRIPTION

[0018] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0019] like Figure 1-2As shown, a tool for preserving holes in cast-in-place concrete floor slabs comprises: a cylinder 1, a positioning connecting rod 2 and a fixed pressing plate 3; a central hole is provided on a template 4, the cylinder 1 is placed on the template 4, the cylinder 1 is a steel pipe with upper and lower openings, the fixed pressing plate 3 is placed on the top of the cylinder 1, the fixed pressing plate 3 is an angle steel, a through hole is provided in the middle of the fixed pressing plate 3, the positioning connecting rod 2 passes through the central hole on the template 4, the through holes on the cylinder 1 and the fixed pressing plate 3, the positioning connecting rod 2 is a screw, the bottom of the positioning connecting rod 2 is rotatably connected with a rotating fixing rod 5 through a pin shaft, when in use, the rotating fixing rod 5 is close to the bottom surface of the template 4, the top of the positioning connecting rod 2 is screwed with a butterfly nut 6, and the butterfly nut 6 presses the fixed pressing plate 3 and the cylinder 1. The cylinder 1 is stably positioned on the template 4 by the rotating fixing rod 5 and the fixed pressing plate 3, and the cylinder 1 is used to reserve the position of the reserved hole during the pouring process. The rotatable fixing rod 5 can be rotated when the device is disassembled, so that the positioning connecting rod 2 can be disassembled from one side of the floor slab, which is more convenient.

[0020] The outer diameter of the cylinder 1 is consistent with the diameter of the designed hole, the length of the cylinder 1 is 3-5 cm more than the thickness of the designed floor, the wall thickness of the cylinder 1 is 2-3 cm, and an arc-shaped cross-barrel handle 7 is welded on the top of the cylinder 1. After the pouring is completed, the arc-shaped cross-barrel handle 7 is used to facilitate the removal of the cylinder 1.

[0021] The length of the positioning connecting rod 2 is 5 cm longer than that of the cylinder 1. A groove for accommodating the rotating fixing rod 5 is provided at the bottom of the positioning connecting rod 2. The rotating fixing rod 5 has different lengths on both sides with the pin as the center. The asymmetric design of the rotating fixing rod 5 has a mass difference on both sides of the pin. The rotating fixing rod 5 can be rotated to a naturally upright state with the pin as the center by gravity, so that the short side of the rotating fixing rod 5 is received in the groove of the positioning connecting rod 2.

[0022] The top of the positioning connecting rod 2 is a flat head 8, and the length of the flat head 8 is 2 cm. When tightening the butterfly nut 6, clamping the flat head 8 can fix the positioning connecting rod 2 to prevent the positioning connecting rod 2 from rotating.

[0023] Limiting clips 9 are welded on both sides of the bottom of the fixed pressing plate 3. The distance from the outer side of the limiting clip 9 to the center of the through hole of the fixed pressing plate 3 is equal to the inner radius of the cylinder 1. The height of the limiting clip 9 is 2 cm. The position of the fixed pressing plate 3 is limited so that the through hole of the fixed pressing plate 3 is in the center of the cylinder 1, ensuring that the positioning connecting rod 2 is centered.

[0024] A gasket 10 is sleeved on the top end of the positioning connecting rod 2 , and the gasket 10 is placed between the butterfly nut 6 and the fixed pressure plate 3 .

[0025] The positioning connecting rod 2 is a steel bar with a diameter of 14 mm, and the rotating fixing rod 5 is a steel bar with a diameter of 8 mm.

[0026] The width of the fixed pressing plate 3 is 30 mm, and the diameter of the through hole of the fixed pressing plate 3 is 2 mm larger than the diameter of the positioning connecting rod 2 .

[0027] The use process of the utility model is as follows: after the template 4 is installed, the center of the reserved hole is positioned on the template 4 according to the design requirements, and a hole is drilled at the center point, and the hole diameter is 5mm larger than the diameter of the positioning connecting rod 2. Insert the positioning connecting rod 2 vertically into the hole, adjust the rotating fixing rod 5 to a horizontal state and make it close to the bottom surface of the template 4, then place the cylinder 1 and the fixed pressure plate 3, the other end of the positioning connecting rod 2 passes through the through hole of the fixed pressure plate 3 and then inserts the gasket 10 and the butterfly nut 6 in sequence, and uses the limit card 9 under the fixed pressure plate 3 to tighten the inner wall of the cylinder 1 to ensure that the positioning connecting rod 2 is centered. After checking the positioning of the cylinder 1, tighten the butterfly nut 6, and start pouring after the cylinder 1 is firmly positioned on the template 4. After the concrete pouring is completed and finally set, the butterfly nut 6 and the fixed pressure plate 3 can be loosened, and the cylinder 1 can be lifted out, and the reserved hole is formed. After the reserved hole is formed, the positioning connecting rod 2 can be used in a turnover manner. When taking out the positioning connecting rod 2, first extend the positioning connecting rod 2 downward, and the rotating fixing rod 5 automatically turns from a horizontal state to an upright state by gravity and is received in the positioning connecting rod 2 groove, and then the positioning connecting rod 2 is extracted upward.

[0028] The utility model is described above by way of example in conjunction with the accompanying drawings. It is obvious that the specific implementation of the utility model is not limited to the above-mentioned method. As long as various improvements are made using the method concept and technical solution of the utility model, or are directly applied to other occasions without improvement, they are all within the protection scope of the utility model.

Claims

1. A tool for pre-reserving holes in cast-in-place concrete slabs, characterized in that: include: A cylinder (1), a positioning connecting rod (2) and a fixed pressure plate (3); a center hole is opened on the template (4), the cylinder (1) is placed on the template (4), the cylinder (1) is a steel pipe with upper and lower openings, the fixed pressure plate (3) is placed on the top of the cylinder (1), the fixed pressure plate (3) is an angle steel, a through hole is opened in the middle of the fixed pressure plate (3), the positioning connecting rod (2) passes through the center hole on the template (4), the cylinder (1) and the through holes on the fixed pressure plate (3), the positioning connecting rod (2) is a screw rod, the bottom of the positioning connecting rod (2) is rotatably connected to a rotating fixing rod (5) through a pin shaft, when in use, the rotating fixing rod (5) is tightly attached to the bottom surface of the template (4), the top of the positioning connecting rod (2) is screwed with a butterfly nut (6), and the butterfly nut (6) presses the fixed pressure plate (3) and the cylinder (1) tightly.

2. A cast-in-place concrete floor reserved hole tool according to claim 1, characterized in that: The outer diameter of the cylinder (1) is consistent with the diameter of the designed hole, the length of the cylinder (1) is 3-5 cm more than the thickness of the designed floor slab, the wall thickness of the cylinder (1) is 2-3 cm, and an arc-shaped cross-barrel handle (7) is welded on the top of the cylinder (1).

3. A cast-in-place concrete floor reserved hole tool according to claim 2, characterized in that: The length of the positioning connecting rod (2) is 5 cm longer than that of the cylinder (1). A groove for accommodating the rotating fixing rod (5) is provided at the bottom of the positioning connecting rod (2). The rotating fixing rod (5) has different lengths on both sides with the pin as the center.

4. A cast-in-place concrete floor reserved hole tool according to claim 2, characterized in that: The top of the positioning connecting rod (2) is a flat head (8), and the length of the flat head (8) is 2 cm.

5. A tool for pre-reserving holes in cast-in-place concrete slabs according to claim 3, characterized in that: Limiting clips (9) are welded on both sides of the bottom of the fixed pressure plate (3); the distance from the outer side of the limiting clip (9) to the center of the through hole of the fixed pressure plate (3) is equal to the inner radius of the cylinder (1); and the height of the limiting clip (9) is 2 cm.

6. A tool for pre-reserving holes in cast-in-place concrete slabs according to claim 1, characterized in that: A gasket (10) is sleeved on the top end of the positioning connecting rod (2), and the gasket (10) is placed between the butterfly nut (6) and the fixed pressure plate (3).

7. A tool for pre-reserving holes in cast-in-place concrete slabs according to claim 3, characterized in that: The positioning connecting rod (2) is a steel bar with a diameter of 14 mm, and the rotating fixing rod (5) is a steel bar with a diameter of 8 mm.

8. A tool for pre-reserving holes in cast-in-place concrete slabs according to claim 7, characterized in that: The width of the fixed pressing plate (3) is 30 mm, and the diameter of the through hole of the fixed pressing plate (3) is 2 mm larger than the diameter of the positioning connecting rod (2).

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