Drill bit for cleaning PVC (polyvinyl chloride) sleeve in building pull rod hole

Abstract

The utility model relates to the technical field of PVC (polyvinyl chloride) sleeve cleaning, in particular to a drill bit for cleaning a PVC sleeve in a building pull rod hole, which comprises a drill rod and is characterized in that blades arranged along the axial direction of the drill rod are uniformly distributed on the outer wall of the drill rod at intervals, and each blade is of a trapezoidal structure with a narrow front end and a wide rear end. The drill bit for cleaning the PVC sleeve in the building pull rod hole is scientific and reasonable in design, has the advantages of being high in working efficiency, good in removing quality, convenient to operate and easy to achieve, and has high innovativeness.

Description

Technical Field

[0001] The utility model relates to the technical field of PVC sleeve cleaning, in particular to a drill bit, in particular to a drill bit used for cleaning PVC sleeves in building tie rod holes. Background Art

[0002] At present, when pouring concrete in the construction industry, the formwork usually uses tie rods to ensure the stability of the formwork during the pouring process. Tie rods are generally made of fine-rolled threaded steel with a diameter less than φ20mm, and matched with PVC sleeves of corresponding sizes. When removing the formwork, the tie rods are smoothly removed from the sleeves to ensure the turnover of the tie rods. After the concrete is poured, the holes formed by the tie rod holes need to be sealed to ensure the appearance quality of the concrete structure. Before sealing, the PVC sleeves are required to be removed and the concrete surface is required to go in 1-2cm to ensure the quality of the repaired holes and avoid the formation of water passages that affect the quality of the entity.

[0003] The traditional plugging process is to use a drill rod and a small hammer to remove it. It is easy to damage the concrete around the hole during removal, and the efficiency is low. Or use an angle grinder to directly cut off the exposed PVC pipe, and then repair the hole. Because the expansion degree of concrete and PVC pipe is different, directly cutting off the PVC casing and keeping it on the same plane with the concrete often causes cracks and cannot meet the quality requirements. Therefore, a drill bit that can quickly clean the PVC casing is needed, which can be used with a handheld electric drill to complete the removal of the PVC pipe in the perforated channel, so that it is easy to use and improves quality and efficiency. Summary of the invention

[0004] The utility model aims to provide a drill bit for cleaning PVC sleeves in building tie rod holes, which has scientific and reasonable structural design, high working efficiency, good removal quality, convenient operation and easy implementation.

[0005] The utility model solves the technical problem through the following technical solutions:

[0006] A drill bit for cleaning PVC sleeves in building tie rod holes comprises a drill rod, and is characterized in that blades arranged along the axial direction are evenly spaced on the outer wall of the drill rod, and the blades are a trapezoidal structure with a narrow front end and a wide rear end.

[0007] Moreover, the drill rod is an integrally formed structure, including a drill bit connecting part, a blade connecting part coaxially arranged at the front end of the drill bit connecting part, and a screw rod part coaxially arranged at the front end of the blade connecting part, and T-shaped slots are evenly distributed axially at intervals on the outer circumference of the blade connecting part; a plug matching the T-shaped slot is provided at the end of the blade, and the blade is inserted in the T-shaped slot; an end nut with a limited blade is threadedly connected to the screw rod part.

[0008] Furthermore, a rubber gasket is connected between the blade and the sealing nut.

[0009] Furthermore, limit marks are evenly spaced along the length direction on the blade edge of each blade.

[0010] Moreover, the limit mark is a notch set on the blade edge of the blade.

[0011] Moreover, there are four blades.

[0012] The advantages and beneficial effects of the utility model are:

[0013] 1. The drill bit used for cleaning PVC sleeves in the tie rod holes of buildings is designed to be conical, so it is convenient to clean the PVC sleeves in the tie rod holes of different apertures. The cleaning efficiency is high, and the inner wall of the tie rod hole will not be damaged, so the problem of cracks after the tie rod hole is repaired is avoided, and the appearance quality is improved.

[0014] 2. This drill bit used for cleaning PVC casing in the hole of building tie rod can flexibly adjust the cleaning depth by setting limit marks on the blade to meet the sealing requirements of tie rod holes with different apertures.

[0015] 3. The utility model is scientifically and reasonably designed and has the advantages of high working efficiency, good removal quality, convenient operation and easy implementation. It is a highly innovative drill bit for cleaning PVC casings in building tie rod holes. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a structural schematic diagram of the drill rod of the utility model;

[0018] Figure 3 It is a top view of the utility model;

[0019] Figure 4 It is a bottom view of the utility model;

[0020] Figure 5 It is a top view of the drill rod of the utility model;

[0021] Figure 6 It is a top view of the blade of the utility model.

[0022] Attached photos

[0023] 1-drill rod, 2-blade, 3-limit mark, 4-end sealing nut, 5-drill bit connection part, 6-T-shaped slot, 7-blade connection part, 8-screw part, 9-rubber gasket. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited by them.

[0025] A drill bit for cleaning PVC casing in a hole of a building tie rod comprises a drill rod 1. The innovation thereof lies in that blades 2 arranged along the axial direction are evenly spaced on the outer wall of the drill rod, and the blades are a trapezoidal structure with a narrow front end and a wide rear end. The drill rod material can be made of high-speed steel (HSS), cobalt alloy or tungsten carbide (tungsten steel) because it is subjected to large torque, to ensure wear resistance and strength.

[0026] The blade can be directly welded to the drill rod, or can be detachably mounted on the drill rod to facilitate replacement of the blade after it is worn.

[0027] The embodiment of the detachable installation of the blade and the drill rod is as follows:

[0028] The drill rod is an integrally formed structure, including a drill bit connection part 5, a blade connection part 7 coaxially arranged at the front end of the drill bit connection part, and a screw part 8 coaxially arranged at the front end of the blade connection part. Four T-shaped slots 6 are evenly distributed at axial intervals on the outer periphery of the blade connection part; a plug matching the T-shaped slot is provided at the end of the blade, and the blade is inserted into the T-shaped slot; a sealing nut 4 with a limited blade is threadedly connected on the screw part. A rubber gasket 9 is connected between the blade and the sealing nut, which plays a role of shock absorption during operation.

[0029] On the blade portion of each blade, there are evenly spaced limit marks 3 along the length direction. In order to ensure the service life of the limit mark, the limit mark is a notch set on the blade edge.

[0030] Taking 32mm PVC casing as an example, the drill rod diameter is 10mm, the lower diameter of the conical drill bit is 20mm, the upper diameter is 40mm, the height is 80mm, the blade slope is 8:1, and the incisions are marked every 1cm to confirm the depth.

[0031] Working principle:

[0032] When the utility model is used, the drill bit rotates rapidly and gradually advances forward from the outside to the inside, expanding 2mm for every 8mm of penetration, so that the drill bit cuts the outside of the PVC casing and exposes the rough surface of the concrete. The depth of the drill bit is controlled by the limit mark to meet different plugging requirements.

[0033] Working process:

[0034] Install the modified drill bit on a portable electric drill, place one end into the hole of the pull rod, slowly apply pressure and start the power, observe the position of the limit mark, and stop the drilling operation when the designed depth is reached.

[0035] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A drill bit for cleaning PVC casing in a hole of a building tie rod, comprising a drill rod, characterized in that: Blades are evenly spaced on the outer wall of the drill rod and arranged along the axial direction thereof, and the blades are a trapezoidal structure with a narrow front end and a wide rear end; The drill rod is an integrally formed structure, including a drill bit connection part, a blade connection part coaxially arranged at the front end of the drill bit connection part, and a screw part coaxially arranged at the front end of the blade connection part. T-shaped slots are evenly distributed at axial intervals on the outer circumference of the blade connection part; a plug matching the T-shaped slot is provided at the end of the blade, and the blade is inserted in the T-shaped slot; an end nut with a limited blade is threadedly connected to the screw part.

2. A drill bit for cleaning PVC sleeves in building tie rod holes according to claim 1, characterized in that: A rubber gasket is connected between the blade and the sealing nut.

3. A drill bit for cleaning PVC sleeves in building tie rod holes according to claim 1, characterized in that: Limit marks are evenly spaced along the length direction of the blade edge of each blade.

4. A drill bit for cleaning PVC sleeves in building tie rod holes according to claim 3, characterized in that: The limit mark is a notch arranged on the blade edge of the blade.

5. A drill bit for cleaning PVC sleeves in building tie rod holes according to claim 1, characterized in that: There are four blades.

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