Hole reserving device

Abstract

The utility model relates to a reserved hole device which comprises a pipe body, the pipe body is a long hose with one sealed end, a piston block is arranged at the unsealed end of the pipe body, a plurality of annular air bags are fixed to the outer edge face of the pipe body and arranged at equal intervals in the length direction of the pipe body, and a through hole penetrating through the two ends of the pipe body in the axial direction is formed in the side wall of the pipe body. Air inlet holes penetrating through the inner end face and the outer end face of the tube body are formed in the positions, located on the annular air bags, of the through hole, each air inlet hole is communicated with the annular air bag at the corresponding position, and a sliding rod is arranged in the through hole and can open or block the air inlet holes by moving in the axial direction of the through hole. The annular air bag is inflated by moving the piston block, the annular air bag can radially support the preformed hole pipeline from inside to outside after being expanded, the supporting strength of the preformed hole pipeline is greatly improved, positioning can be achieved only by moving the sliding rod after inflation, operation is convenient and fast, the structure matching precision is low, the whole device can be recycled, and the cost is low. And the production and use cost is lower.

Description

Technical Field

[0001] This utility model relates to the field of building construction, specifically a device for pre-reserving holes. Background Technology

[0002] During the construction process, depending on the needs of later construction, some wall structures need to be reserved with holes. The existing method of reserving holes is to fix the pipes in advance at the reserved hole position. This method is suitable for construction environments with thin walls. However, when the wall thickness is large, the weight and pressure of the concrete are large, which can easily cause the pipes to deform. This requires secondary repair of the hole and may even affect subsequent construction.

[0003] The device for pre-reserving holes with strong support and shaping disclosed in CN219710973U can solve the problem of pipe deformation by setting a support structure inside the pipe and applying a support force from the inside to the outside. However, this solution still has the following problems: 1. The internal support structure of the pipe is complex and has many fits, resulting in high manufacturing and use costs and easy fit errors, thus poor practicality; 2. The above solution can only be applied to straight pipe holes and is difficult to apply to the reservation of curved holes such as bridge box girders, which has certain limitations. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, this utility model adopts a pre-reserved hole device, which solves the problems of poor practicality and inability to be applied to pre-reserved curved holes in the prior art.

[0005] The technical solution is a pre-drilled hole device, including a tube body, which is a long flexible tube sealed at one end. A piston block is provided at the unsealed end of the tube body. Multiple annular airbags are fixed on the outer edge of the tube body. All annular airbags are arranged at equal intervals along the length of the tube body. A through hole is opened on the side wall of the tube body, penetrating both ends of the tube body along the axial direction. An air inlet is opened on the through hole at the position of each annular airbag, penetrating the inner and outer end faces of the tube body. Each air inlet is interconnected with the corresponding annular airbag. A sliding rod is provided in the through hole. The sliding rod can open or block the air inlet by moving along the axial direction of the through hole.

[0006] The outer edge of the tube is provided with an annular groove corresponding to each annular airbag. The inner end of the annular airbag is placed in the annular groove and fixedly connected to the annular groove. The outer end of the air inlet is located in the annular groove. The annular airbag is provided with an air inlet at the opening position of the corresponding outer end of the air inlet at the inner end of the annular groove, and the air inlet and the air inlet are interconnected.

[0007] The slide rod has small holes at the corresponding positions of each air inlet. Each small hole passes through the slide rod in a direction parallel to the axis of the air inlet. When the slide rod moves along the axis of the through hole, the small hole can be coaxial with or disconnected from the air inlet at the corresponding position.

[0008] Both ends of the slide rod extend out of the through hole and are fixed with a pull ring at the end.

[0009] The through hole has cavities with a diameter larger than the through hole at both ends. A slider with an outer diameter larger than the through hole is installed in the cavity, and the slider is fixedly connected to the slider rod.

[0010] A piston rod is fixed to the outer end of the piston block, and the piston rod passes through the end face of the tube body.

[0011] This utility model has the following advantages over the prior art:

[0012] 1. This utility model inflates the annular airbag by moving the piston block, so that the annular airbag can provide radial support to the pre-reserved hole pipe from the inside out after expansion, which greatly improves the support strength of the pre-reserved hole pipe. After inflation, it can be positioned by simply moving the slide rod, which is convenient and quick to operate. Moreover, the structure has low precision, the whole device can be recycled, and the production and use costs are lower.

[0013] 2. Because the pipe is a flexible tube, for pipes with reserved holes that require a certain degree of curvature, such as pipes with reserved holes in bridge box girders, the external force on the piston rod needs to be released so that the piston block can move freely, thus enabling the pipe to bend freely, which has a wider range of applications. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention.

[0015] Figure 2 This is a front sectional view of the present invention in use.

[0016] Figure 3 for Figure 2 A magnified view of A in the middle. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings.

[0018] Depend on Figures 1 to 3 The present invention includes a tube body 1, which is a long flexible tube sealed at one end. A piston block 2 is provided at the unsealed end of the tube body 1. Multiple annular airbags 3 are fixed on the outer edge of the tube body 1. All annular airbags 3 are arranged at equal intervals along the length of the tube body 1. A through hole 4 is provided on the side wall of the tube body 1, which penetrates both ends of the tube body 1 along the axial direction. An air inlet 5 is provided on the through hole 4 at the position of each annular airbag 3, which penetrates the inner and outer end faces of the tube body 1. Each air inlet 5 is connected to the corresponding annular airbag. A sliding rod 6 is provided in the through hole 4. The sliding rod 6 can open or block the air inlet 5 by moving along the axial direction of the through hole 4.

[0019] The outer edge of the tube body 1 is provided with an annular groove 7 corresponding to each annular airbag 3. The inner end of the annular airbag 3 is placed in the annular groove 7 and fixedly connected to the annular groove 7. The outer end of the air inlet 5 is located in the annular groove 7. The annular airbag 3 is provided with an air inlet 8 at the opening position of the corresponding outer end of the air inlet 5 at the inner end of the annular groove 7, and the air inlet 8 and the air inlet 5 are interconnected.

[0020] The slide rod 6 has a small hole 9 at the corresponding position of each air inlet 5. Each small hole 9 passes through the slide rod 6 in a direction parallel to the axis of the air inlet 5. When the slide rod 6 moves axially along the through hole 4, the small hole 9 can be coaxial with or disconnected from the corresponding air inlet 5.

[0021] The slide rod 6 is an elastic rod that can bend freely with the tube body 1. Both ends of the slide rod 6 extend out of the through hole 4 and are fixed with pull rings 10 at the ends.

[0022] The through hole 4 has cavities 11 with a diameter larger than that of the through hole 4 at both ends. A slider 12 with an outer diameter larger than that of the through hole 4 is provided in the cavity 11. The slider 12 is fixedly connected to the slider rod 6.

[0023] The piston block 2 is fixed with a piston rod 13 at its outer end, and the piston rod 13 passes through the end face of the tube body 1.

[0024] In use, the pipe body 1 is first placed inside the pre-drilled pipe requiring support, ensuring the position of the sliding rod 6 so that all the small holes 9 are connected to the corresponding air inlets 5. Before concrete pouring, the piston rod 13 is manually or with the aid of a flat-push device moved into the pipe body 1. As the piston block 2 moves with the piston rod 13, it compresses the volume of the pipe body 1 cavity, allowing air inside the cavity to enter the annular airbag 3 through the air inlet 5, small holes 9, and air inlet 8. This causes the annular airbag 3 to expand until its outer edge is in contact with the inner wall of the pre-drilled pipe. At this point, the annular airbag 3 provides radial support to the pre-drilled pipe from the inside out. Then, the pull ring 10 is manually pulled or pushed to move the sliding rod 6 a certain distance along the through hole 4, disconnecting all the small holes 9 from the air inlets 5. At this point, all the annular airbags 3 form a dense... In a closed environment where gas exchange is impossible, the annular airbag 3 can always support the pre-drilled pipe without applying external force to the piston rod 13. The pre-drilled pipe is then fixed in the pre-drilled position. Since this device uses multiple sets of annular airbags 3 to support the pre-drilled pipe in sections, and the pipe body 1 is a flexible tube, the pipe body 1 can bend along with the pre-drilled pipe when the device is applied to a flexible pre-drilled pipe. After the position of the pre-drilled pipe is fixed, the concrete is poured until it is completely hardened. Then, the pull ring 10 is pulled in the opposite direction to push the slide rod 6 back to its original position, so that all the small holes 9 are reconnected to the air inlet 5. Then, the piston rod 13 is pulled outward to allow the gas in the annular airbag 3 to flow back into the pipe body 1. Finally, the entire device can be removed from the pre-drilled pipe.

[0025] This invention uses a moving piston block 2 to inflate an annular airbag 3, allowing the inflated annular airbag 3 to provide radial support to the pre-drilled pipe from the inside out, greatly improving the support strength of the pre-drilled pipe. After inflation, positioning can be achieved simply by moving the sliding rod 6, making operation convenient and quick. Furthermore, the structure has low precision requirements, and the entire device can be reused, resulting in lower production and usage costs. Since the pipe body 1 is a flexible tube, for pre-drilled pipes with certain curvature requirements, such as those in bridge box girders, simply releasing the external force on the piston rod 13 allows the piston block 2 to move freely, enabling the pipe body 1 to bend freely, thus expanding its application range.

Claims

1. A device for pre-drilling holes, comprising a tube body (1), characterized in that, The tube (1) is a long flexible tube with one end sealed. A piston block (2) is provided at the unsealed end of the tube (1). Multiple annular airbags (3) are fixed on the outer edge of the tube (1). All annular airbags (3) are arranged at equal intervals along the length of the tube (1). A through hole (4) is provided on the side wall of the tube (1) and penetrates both ends of the tube (1) along the axial direction. An air inlet (5) is provided on the through hole (4) at the position of each annular airbag (3) and penetrates the inner and outer end faces of the tube (1). Each air inlet (5) is connected to the annular airbag at the corresponding position. A sliding rod (6) is provided in the through hole (4). The sliding rod (6) can open or block the air inlet (5) by moving along the axial direction of the through hole (4).

2. A pre-punched hole device according to claim 1, wherein, The outer edge of the tube (1) is provided with an annular groove (7) corresponding to each annular airbag (3). The inner end of the annular airbag (3) is placed in the annular groove (7) and fixedly connected to the annular groove (7). The outer end of the air inlet (5) is located in the annular groove (7). The annular airbag (3) is provided with an air inlet (8) at the opening position of the inner end of the annular groove (7) and the corresponding outer end of the air inlet (5). The air inlet (8) and the air inlet (5) are interconnected.

3. The hole reserving device according to claim 1, wherein The slide rod (6) is provided with small holes (9) at the corresponding positions of each air inlet (5). Each small hole (9) passes through the slide rod (6) in a direction parallel to the axis of the air inlet (5). When the slide rod (6) moves along the through hole (4) axially, the small hole (9) can be coaxial with or disconnected from the corresponding air inlet (5).

4. The hole reserving device according to claim 1, wherein The slide rod (6) is an elastic rod that can bend freely with the tube (1). Both ends of the slide rod (6) extend out of the through hole (4) and are fixed with pull rings (10).

5. The device of claim 1, wherein, The through hole (4) has cavities (11) with a diameter larger than the through hole (4) at both ends. A slider (12) with an outer diameter larger than the through hole (4) is provided in the cavity (11). The slider (12) is fixedly connected to the slider rod (6).

6. The device of claim 1, wherein, The piston block (2) is fixed with a piston rod (13) at its outer end, and the piston rod (13) passes through the end face of the tube body (1).

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