Concrete structure embedded sleeve fixing device

Abstract

The utility model discloses a concrete structure embedded casing pipe fixing device which comprises a formwork and a positioning pipe capable of coaxially extending into a casing pipe, the end portion of the positioning pipe is connected with a positioning plate located outside the casing pipe, the positioning plate is detachably connected with the formwork, and a sealing piece is arranged between the positioning pipe and the casing pipe. The device can be recycled, is simple and convenient to operate, can ensure safety in all aspects during installation, greatly reduces the construction cost, and saves manpower and material resources. Construction procedures are reduced, working efficiency is improved, labor intensity is reduced, and economy and environmental protection are achieved.

Description

Technical Field

[0001] This utility model relates to the field of concrete construction technology, and in particular to a pre-embedded sleeve fixing device for concrete structures. Background Technology

[0002] During the construction of concrete structures, it is usually necessary to pre-embed some sleeves in the concrete structure. For example, to fix the sleeves, additional steel bars and welded steel bars need to be added around the sleeves, which affects the progress of the project. In addition, in order to prevent the surrounding concrete slurry from entering the sleeves during concrete pouring, the openings (i.e., the ports) at both ends of the pre-embedded sleeves need to be sealed. The traditional method of sealing the open parts with tape is not only troublesome to disassemble and assemble, but also makes it difficult to find the pre-embedded sleeves after the formwork is removed, affecting the later construction. In some cases, the tape of the pre-embedded sleeves is damaged, and concrete flows into the sleeves, requiring the cleaning of the concrete inside the sleeves, which is time-consuming and labor-intensive. Utility Model Content

[0003] To solve at least one of the above-mentioned technical problems, this utility model proposes a pre-embedded sleeve fixing device for concrete structures.

[0004] The technical solution adopted in this utility model is to design a pre-embedded sleeve fixing device for concrete structures, including a template and a positioning tube that can extend coaxially into the sleeve. The end of the positioning tube is connected to a positioning plate located outside the sleeve. The positioning plate is detachably connected to the template, and a sealing element is provided between the positioning tube and the sleeve.

[0005] In some embodiments, the sealing device is a water-swellable sealing strip located between the outer wall of the positioning tube and the inner wall of the sleeve.

[0006] In some embodiments, the positioning plate and the template are detachably connected by screws.

[0007] In some embodiments, the positioning plate is provided with a magnet, and the template is a ferromagnetic material that can be attracted by the magnet.

[0008] In some embodiments, the sealing device includes a first support plate and a second support plate, the first support plate being fixedly connected to the positioning tube, an elastic membrane being connected between the edges of the first support plate and the second support plate, the first support plate moving relative to the second support plate, thereby causing the elastic membrane to expand and contract radially, and further including a spacing adjustment component for controlling the spacing between the second support plate and the positioning plate.

[0009] In some embodiments, the spacing adjustment assembly includes a pull rod connected to the second support plate, the second support plate having a through hole through which the pull rod slides, and the end of the pull rod passing through the second support plate having a thread.

[0010] In some embodiments, the template is provided with a through hole through which the tie rod slides.

[0011] In some embodiments, the spacing adjustment assembly includes a screw, a second support plate is provided with a threaded sleeve that is threaded to the screw, the screw is rotatably connected to the first support plate via a rotating assembly, and the positioning plate is provided with an operating hole corresponding to the end of the screw, the end of the screw being located within the operating hole.

[0012] In some embodiments, the screw end has a tip for gripping with a wrench.

[0013] In some embodiments, the rotating assembly includes a through hole on the first support plate, and the screw is provided with stops on both sides of the through hole.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] This invention utilizes a template to position the sleeve. A water-swellable sealing strip is installed, which expands to prevent water and concrete from entering the sleeve. After pouring and once the concrete reaches the required demolding level, the side formwork is removed as instructed. Simultaneously, the water-swellable sealing strip has largely evaporated, allowing for simultaneous removal of the device. This saves time and labor, and the device can be reused in later pre-embedding processes. This fixing device is recyclable, easy to operate, and ensures safety during installation, significantly reducing construction costs and saving manpower and resources. It streamlines construction procedures, improves work efficiency, reduces labor intensity, and is both economical and environmentally friendly. Attached Figure Description

[0016] The present invention will now be described in detail with reference to specific embodiments and accompanying drawings. To illustrate the details and facilitate understanding of its principles, the drawings are not necessarily to scale, and similar reference numerals may describe similar components in different views. The accompanying drawings generally illustrate the embodiments discussed herein by way of example and not limitation. Wherein:

[0017] Figure 1 This is a schematic diagram of Example 1.

[0018] Figure 2 This is a schematic diagram of Example 2.

[0019] Figure 3 This is a schematic diagram of the radial elongation of the elastic membrane in Example 2.

[0020] Figure 4 This is a schematic diagram of Example 3.

[0021] Figure 5This is a schematic diagram of the radial elongation of the elastic membrane in Example 3.

[0022] Figure 6 This is a schematic diagram of the template in Example 3 without any openings.

[0023] In the diagram, 1. Template; 2. Sleeve; 3. Positioning tube; 4. Positioning plate; 5. Water-swellable sealing strip; 6. Screw; 7. First support plate; 8. Second support plate; 9. Elastic membrane; 10. Tie rod; 11. Nut; 12. Screw; 13. Screw sleeve; 14. Stop; 15. Hexagonal end. Detailed Implementation

[0024] The following are specific embodiments of this utility model, and the technical solution of this utility model will be further described with reference to the accompanying drawings. However, this utility model is not limited to these embodiments, and the following embodiments do not limit the utility model involved in the claims. In addition, all combinations of features described in the embodiments are not necessarily necessary for the solution of the utility model.

[0025] The principle and structure of this utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0026] Example 1

[0027] like Figure 1 As shown, a pre-embedded sleeve fixing device for concrete structures includes a template 1 and a positioning tube 3 that can coaxially extend into a sleeve 2. A positioning plate 4 located outside the sleeve 2 is connected to the end of the positioning tube 3. The positioning plate 4 is detachably connected to the template 1, and a sealing element is provided between the positioning tube 3 and the sleeve 2. The positioning plate 4 is made of galvanized steel sheet or galvanized steel pipe. The sealing device is a water-swellable sealing strip 5 located between the outer wall of the positioning tube 3 and the inner wall of the sleeve 2. The positioning plate 4 and the template 1 are detachably connected by screws 6.

[0028] Mark the location and model of the embedded sleeve 2 on the already erected template 1. Process two galvanized steel plates of different diameters for the sleeve 2. Leave four screw holes 6 on the steel plates. Weld a galvanized steel pipe to the upper part of the galvanized steel plate. Fill the gap between the galvanized steel pipe and the embedded sleeve 2 with a water-swellable sealing strip 5. Seal both ends of the embedded sleeve 2 with this device. Fix the galvanized steel plate to the erected template 1 with screws 6. This serves to fix the embedded sleeve 2 and seal the end holes. When the concrete is poured in this part, some of the water in the concrete seeps into the water-swellable sealing strip 5, causing the water-swellable sealing strip 5 to expand and stop the water and concrete. After the concrete is poured and meets the demolding requirements, the side template 1 is removed as required. At the same time as the template 1 is removed, the water in the water-swellable sealing strip 5 has basically evaporated. Remove the device at the same time as the template 1, which saves time and effort. It can also be reused in later embedded parts.

[0029] As a preferred option, the detachable connection between the positioning plate 4 and the template 1 via bolts can be replaced by a magnetic connection. For example, a magnet can be installed on the positioning plate 4, and the template 1 can be made of a ferromagnetic material that can be attracted by the magnet, such as a galvanized steel plate that can be attracted by a magnetic field. Using magnetism to achieve a relatively fixed connection between the positioning plate 4 and the template 1 also facilitates disassembly.

[0030] Example 2

[0031] like Figure 2 , 3 As shown, unlike the above embodiment, the sealing device includes a first support plate 7 and a second support plate 8. The first support plate 7 is fixedly connected to the positioning tube 3. An elastic membrane 9, such as a rubber membrane, is connected between the edges of the first support plate 7 and the second support plate 8. The first support plate 7 moves relative to the second support plate 8, thereby causing the elastic membrane 9 to expand and contract radially. The device also includes a spacing adjustment assembly for controlling the distance between the second support plate 8 and the positioning plate 4. The spacing adjustment assembly includes a pull rod 10 connected to the second support plate 8. The second support plate 8 has a through hole through which the pull rod 10 slides. The end of the pull rod 10 passing through the second support plate 8 is threaded. The template 1 has a through hole through which the pull rod 10 slides. A nut 11 is fitted onto the threaded end of the pull rod 10 that passes through the template 1. Rotating the nut 11 causes the pull rod 10 to move outward, thereby pulling the second support plate 8 outward. The second support plate 8 moves toward the first support plate 7, so that the elastic membrane 9 extends radially and presses against the inner wall of the embedded pipe, thereby achieving the fixation and sealing of the embedded pipe.

[0032] Example 3

[0033] like Figure 4 , 5As shown, unlike the above embodiment, the spacing adjustment assembly includes a screw 12. A threaded sleeve 13, threadedly engaged with the screw 12, is fixed on the second support plate 8. The screw 12 is rotatably connected to the first support plate 7 via a rotating assembly. An operating hole corresponding to the end of the screw 12 is provided on the positioning plate 4, and the end of the screw 12 is located within the operating hole. The rotating assembly includes a through hole on the first support plate 7. A stop 14 is fixed on both sides of the through hole on the screw 12. The stop 14 restricts the axial movement of the screw 12 relative to the first support plate 7, but allows relative rotation. Thus, when the screw 12 is rotated, the threaded sleeve 13 moves axially relative to the screw 12, thereby causing the second support plate 8 to move relative to the first support plate 7, thereby controlling the radial expansion and contraction of the elastic membrane 9, and thus determining whether the sleeve 2 wall is sealed. The end of the screw 12 has a wrench-gripping end, for example, a hexagonal end 15 for rotating a hexagonal wrench.

[0034] The template 1 may or may not have a hole corresponding to the end of the screw 12. When the template 1 has a hole, the end of the screw 12 can pass through the template 1, allowing the screw 12 to be rotated with a wrench, thereby controlling the movement of the second support plate 8. Figure 6 As shown, when no hole is provided on the template 1, the end of the screw 12 is located inside the operating hole, and the end does not exceed the outer surface of the positioning plate 4, so as to facilitate the fit between the template 1 and the positioning plate 4.

[0035] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to replace them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A concrete structure pre-sleeve fixing device, characterized in that, The positioning pipe comprises a template and a positioning pipe capable of coaxially extending into a sleeve, the positioning pipe is connected with a positioning plate outside the sleeve, the positioning plate is detachably connected with the template, and a sealing device is arranged between the positioning pipe and the sleeve; the sealing device comprises a first support plate and a second support plate, the first support plate is fixedly connected with the positioning pipe, an elastic film is connected between edges of the first support plate and the second support plate, the first support plate is moved relative to the second support plate, so that the elastic film is radially expanded and contracted, and a spacing adjusting assembly for controlling spacing between the second support plate and the positioning plate is further arranged.

2. The concrete structure pre-sleeve fixture of claim 1, wherein, The spacing adjusting assembly comprises a pull rod connected with the second support plate, a through hole is arranged on the second support plate and the pull rod is slidably arranged through the through hole, and an end of the pull rod passing through the second support plate is provided with a thread.

3. The concrete structure pre-sleeve fixture of claim 2, wherein, A through hole is arranged on the template and the pull rod is slidably arranged through the through hole.

4. The concrete structure pre-sleeve fixture of claim 1, wherein, The spacing adjusting assembly comprises a screw rod, a screw sleeve threadedly matched with the screw rod is arranged on the second support plate, the screw rod is rotationally connected with the first support plate through a rotating assembly, the positioning plate is provided with an operation hole corresponding to an end of the screw rod, and the end of the screw rod is arranged in the operation hole.

5. The concrete structure pre-sleeve fixture of claim 4, wherein, The end of the screw rod is provided with an end head for clamping by a wrench.

6. The concrete structure pre-sleeve fixture of claim 4, wherein, The rotating assembly comprises a through hole arranged on the first support plate, and the screw rod is provided with a stopper arranged on both sides of the through hole.

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