A dynamic sealing plugging device for a multi-layer goaf grouting hole

Abstract

This utility model discloses a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas. It includes a lower flange and an upper flange sleeved on the outside of the grouting pipe. The lower flange and upper flange are connected by a telescopic rod, and several vertically distributed annular rubber gaskets are installed between them. An upper annular airbag is placed on the upper flange, and the upper annular airbag is equipped with a vent pipe connected to an external air pump. This dynamic sealing and plugging device for grouting holes in multi-layer goaf areas uses annular airbags and compressed annular rubber gaskets to dynamically seal the diameter change points inside the hole. It is time-efficient, shortening the construction cycle. Furthermore, the flexible pressure-bearing characteristics of the annular airbags and annular rubber gaskets absorb mechanical vibration energy, resulting in a good sealing effect, preventing grout overflow, and ease of use.

Description

Technical Field

[0001] This utility model relates to the field of grouting technology in goaf areas, specifically a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas. Background Technology

[0002] In the grouting treatment project of multi-layer old goaf, the grouting method adopted follows the grouting principle of "deep first, shallow second; bottom first, top second; curtain hole first, grouting hole second". That is, the deep goaf is drilled first to avoid the shallow grout blocking the deep channel; and the grouting pipe is lifted up in sections from the bottom of the hole to ensure complete filling in the vertical direction. This method can greatly improve the uniformity of goaf filling.

[0003] Currently, when using the above method for grouting in multi-layer goaf areas, it is also necessary to seal the diameter change point in the borehole by injecting concrete between the borehole wall and the grouting pipe. However, when pulling the grouting pipe from bottom to top, mechanical vibration can cause circumferential cracking of the poured concrete, resulting in grout overflowing from the cracks. In addition, when using poured concrete for sealing, the concrete setting time is long, which can easily lead to an extension of the construction period. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas. It uses an annular airbag and a compressed annular rubber pad to dynamically seal the diameter change points inside the hole. It is quick and can shorten the construction cycle. Furthermore, the flexible pressure-bearing characteristics of the annular airbag and the annular rubber pad can absorb mechanical vibration energy, resulting in a good sealing effect, preventing grout overflow, and being easy to use. It can effectively solve the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas, comprising a lower flange and an upper flange sleeved on the outside of the grouting pipe, wherein the lower flange and the upper flange are connected by a telescopic rod, and a plurality of vertically distributed annular rubber gaskets are installed between the lower flange and the upper flange, wherein an upper annular airbag is placed on the upper flange, and the upper annular airbag is provided with a vent pipe connected to an external air pump.

[0006] As a preferred embodiment of this utility model, the annular rubber pad has an insertion hole at the corresponding part of the telescopic rod, and the telescopic rod is movably inserted into the insertion hole.

[0007] As a preferred embodiment of this utility model, the annular rubber pad has a hollow structure.

[0008] As a preferred technical solution of this utility model, a lower annular airbag is placed on the upper surface of the top annular rubber pad, and the lower annular airbag is movably sleeved on the telescopic rod.

[0009] As a preferred technical solution of this utility model, the lower annular airbag is provided with a connecting pipe that communicates with the upper annular airbag, and the upper flange is provided with a through hole for inserting the connecting pipe.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] This utility model provides a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas. It uses an annular airbag and a compressed annular rubber pad to dynamically seal the diameter change points inside the hole. The process is quick, which can shorten the construction cycle. Furthermore, the flexible pressure-bearing characteristics of the annular airbag and the annular rubber pad can absorb mechanical vibration energy, resulting in a good sealing effect, preventing grout overflow, and making it easy to use. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model;

[0013] Figure 2 This is a partial structural schematic diagram of the present invention;

[0014] Figure 3 This is a cross-sectional view of the annular rubber pad in this utility model.

[0015] In the diagram: 1 Lower flange, 2 Upper flange, 21 Through hole, 3 Telescopic rod, 4 Annular rubber gasket, 41 Insertion hole, 5 Lower annular airbag, 51 Connecting pipe, 6 Upper annular airbag, 61 Vent pipe. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3 This utility model provides a technical solution: a dynamic sealing and plugging device for grouting holes in multi-layer goaf areas, including a lower flange 1 and an upper flange 2 sleeved on the outside of the grouting pipe. The lower flange 1 and the upper flange 2 are connected by a telescopic rod 3, and several vertically distributed annular rubber gaskets 4 are installed between the lower flange 1 and the upper flange 2. An upper annular airbag 6 is placed on the upper flange 2, and the upper annular airbag 6 is provided with a vent pipe 61 connected to an external air pump. In the initial state, under the support of the annular rubber gaskets 4 and the lower annular airbag 5, the telescopic rod 3 is in its longest state. After the upper annular airbag 6 is inflated by the external air pump, the upper annular airbag 6 adheres to the steel pipe wall and the grouting pipe to form a dynamic seal.

[0018] Furthermore, the annular rubber pad 4 has an insertion hole 41 at the corresponding part of the telescopic rod 3, and the telescopic rod 3 is movably inserted into the insertion hole 41.

[0019] Furthermore, the annular rubber pad 4 has a hollow structure, which allows it to undergo greater deformation, thereby fitting the steel pipe wall and the grouting pipe.

[0020] Furthermore, a lower annular airbag 5 is placed on the upper surface of the top annular rubber pad 4, and the lower annular airbag 5 is movably sleeved on the telescopic rod 3. The lower annular airbag 5 is provided with a connecting pipe 51 that communicates with the upper annular airbag 6, and the upper flange 2 is provided with a through hole 21 for inserting the connecting pipe 51. In the initial state, under the support of the annular rubber pad 4 and the lower annular airbag 5, the telescopic rod 3 is in its longest state. After the lower annular airbag 5 is inflated, the lower annular airbag 5 squeezes the annular rubber pad 4, causing the annular rubber pad 4 to deform and fit more closely to the steel pipe wall and the grouting pipe, thereby forming a dynamic seal.

[0021] When using:

[0022] After the grouting hole is formed, the grouting hole is thoroughly cleaned and inspected; a Ф50mm grouting pipe is lowered to the bottom of the hole, and then the device is installed at the diameter change point inside the hole;

[0023] After installation, the upper annular airbag 6 and the lower annular airbag 5 are inflated by an external air pump. After inflation, the lower annular airbag 5 expands and squeezes the annular rubber pad 4. After the annular rubber pad 4 is deformed, it fits the steel pipe wall and the grouting pipe better, so that the annular rubber pad 4, the upper annular airbag 6 and the lower annular airbag 5 provide a dynamic seal between the grouting pipe and the steel pipe wall.

[0024] This invention uses an annular airbag and a compressed annular rubber pad 4 to dynamically seal the diameter change point inside the hole. It is quick and can shorten the construction cycle. Furthermore, the flexible pressure-bearing characteristics of the annular airbag and the annular rubber pad 4 can absorb mechanical vibration energy, resulting in a good sealing effect, preventing slurry overflow, and making it easy to use.

[0025] The parts not disclosed in this utility model are all prior art, and their specific structures, materials, and working principles will not be described in detail. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of this utility model, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dynamic sealing and plugging device for grouting holes in multi-layer goaf areas, comprising a lower flange (1) and an upper flange (2) sleeved on the outside of the grouting pipe, characterized in that: The lower flange (1) and the upper flange (2) are connected by a telescopic rod (3), and several vertically distributed annular rubber pads (4) are installed between the lower flange (1) and the upper flange (2). An upper annular airbag (6) is placed on the upper flange (2), and an air pipe (61) connected to an external air pump is provided on the upper annular airbag (6).

2. The dynamic sealing and plugging device for grouting holes in multi-layer goaf areas according to claim 1, characterized in that: The annular rubber pad (4) has a socket (41) at the corresponding part of the telescopic rod (3), and the telescopic rod (3) is movably inserted into the socket (41).

3. The dynamic sealing and plugging device for grouting holes in multi-layer goaf areas according to claim 1, characterized in that: The annular rubber pad (4) has a hollow structure.

4. The dynamic sealing and plugging device for grouting holes in multi-layer goaf areas according to claim 1, characterized in that: The upper surface of the top annular rubber pad (4) is fitted with a lower annular airbag (5), and the lower annular airbag (5) is movably sleeved on the telescopic rod (3).

5. The dynamic sealing and plugging device for grouting holes in multi-layer goaf areas according to claim 4, characterized in that: The lower annular airbag (5) is provided with a connecting pipe (51) that communicates with the upper annular airbag (6), and the upper flange (2) is provided with a through hole (21) for inserting the connecting pipe (51).

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