Tunnel grouting steel floral tube

Abstract

The utility model belongs to the technical field of grouting steel floral tubes for tunnels, and particularly relates to a tunnel grouting steel floral tube which comprises two coaxial steel floral tubes arranged at intervals and a connecting piece arranged between the two steel floral tubes and used for connecting the two steel floral tubes, and a plurality of grouting holes are formed in the peripheral side surface of each steel floral tube. The connecting piece comprises a sleeve coaxially arranged at the connecting position of the two steel floral tubes and a connecting ring coaxially arranged on the inner ring of the sleeve, the two end faces of the connecting ring stretch out of the sleeve in the axial direction of the connecting ring and are located in the adjacent steel floral tubes, and the outer ring surface of the connecting ring abuts against the inner ring surface of each steel floral tube. And a plurality of movable blocks matched with the grouting holes in the surfaces of the adjacent steel floral tubes are elastically and slidably connected to the peripheral side surface of the connecting ring, and each movable block moves in the radial direction of the connecting ring, and by means of the technical scheme, the problem that at present, a connecting device between two steel floral tubes can affect the construction efficiency of the steel floral tubes can be effectively solved.

Description

Technical Field

[0001] This utility model belongs to the technical field of grouting steel pipes for tunnels, and specifically relates to a grouting steel pipe for tunnels. Background Technology

[0002] During tunnel construction, steel pipes are typically used as an advanced support method. Installed in front of the tunnel excavation face, they provide temporary support, enhance the stability of the surrounding rock, and prevent tunnel collapse during excavation. Grouting involves injecting cement slurry and other materials into the steel pipes, which then permeate into the surrounding soil, effectively improving the physical and mechanical properties of the soil and further enhancing the stability and bearing capacity of the surrounding rock, thus extending the tunnel's service life. In actual construction, the length of the steel pipes is usually determined based on the specific needs of the project. However, some excessively long steel pipes need to be cut for easier transport and reassembly during subsequent construction. For example, Chinese patent disclosure of a pipe roof grouting steel pipe (patent publication number: CN213205694U) includes a connecting device between the steel pipe and an extension pipe for fixing them together, which significantly improves work efficiency compared to threaded connections. While this technical solution can improve the connection efficiency between steel pipes and between steel pipes and extension pipes, the connecting device in this solution has a diameter larger than the steel pipe. When the steel pipe is placed in the designated area during construction, the size of the connecting device will hinder the placement of the steel pipe, leading to a decrease in construction efficiency. Therefore, it is necessary to provide a quick connection device between steel pipes that can effectively ensure the connection between two steel pipes without affecting the efficiency of placing the steel pipe into the borehole. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a tunnel grouting steel pipe to solve the problem that the connection device between two steel pipes affects the construction efficiency of the steel pipe.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A tunnel grouting steel pipe includes two coaxial and spaced steel pipes and a connector disposed between the two steel pipes for connecting them. Each steel pipe has multiple grouting holes on its circumferential surface. The connector includes a sleeve coaxially disposed at the connection point of the two steel pipes and a connecting ring coaxially disposed within the inner ring of the sleeve. The diameter of the sleeve is the same as the diameter of the two steel pipes. The two end faces of the connecting ring extend axially from the sleeve and are located within adjacent steel pipes. The outer ring surface of the connecting ring abuts against the inner ring surface of each steel pipe. Multiple movable blocks are elastically inserted through the circumferential surface of the connecting ring, engaging with the grouting holes on the surfaces of adjacent steel pipes. Each movable block moves radially along the connecting ring. When multiple movable blocks simultaneously engage with the grouting holes on the surfaces of adjacent steel pipes, the sleeve abuts against the two end faces of that steel pipe.

[0006] Furthermore, the outer surface of the connecting ring is fitted with two first sealing rings respectively located at both ends of the sleeve. The vertical cross-section of the first sealing ring is "L" shaped. The peripheral surface of the connecting ring near both ends of the sleeve is provided with annular grooves. One side surface of each first sealing ring is fixedly connected to the sleeve, and the other side surface is set in the groove, with part of the surface of the first sealing ring protruding out of the groove.

[0007] Furthermore, the connecting ring includes a first movable ring and a second movable ring respectively movably disposed on the inner ring of the sleeve. The first movable ring and the second movable ring are symmetrically arranged about the vertical center line of the sleeve, and the outer ring surfaces of the first movable ring and the second movable ring are threadedly connected to the inner ring surface of the sleeve.

[0008] Furthermore, the outer surfaces of the first movable ring and the second movable ring are each fitted with a second sealing ring that abuts against the inner wall of the steel pipe, and the end faces of the first movable ring and the second movable ring near the adjacent steel pipe are both chamfered.

[0009] Furthermore, the end face of each movable block away from the connecting ring is chamfered, and the chamfered surface matches the end face of the adjacent steel pipe.

[0010] The beneficial effects of this utility model are as follows:

[0011] 1. This utility model uses a connector to fix two steel pipes together, and the diameter of the sleeve in the connector is the same as the diameter of the two steel pipes, which ensures the working efficiency when the steel pipes are driven into the construction area. Furthermore, by fitting a first sealing ring and a second sealing ring on the surface of the connecting ring, the grout is prevented from leaking from the gap between the connector and the steel pipes, effectively ensuring the sealing between the connector and the two steel pipes.

[0012] Other advantages, objectives, and features of this invention will be set forth in the following description and will be apparent to those skilled in the art to some extent, or may be learned by practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0013] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the following drawings are provided for illustration:

[0014] Figure 1 This is a schematic diagram showing the connection between the steel perforated pipe and the connector of this utility model;

[0015] Figure 2 This is an exploded view of the steel perforated pipe and connector of this utility model;

[0016] Figure 3 This is a cross-sectional view of the steel flower tube of this utility model;

[0017] Figure 4 for Figure 3 Enlarged diagram of point A in the middle.

[0018] The following labels are shown in the attached diagram:

[0019] 1. Steel pipe, 2. Connector, 201. Sleeve, 202. Connecting ring, 2021. First movable ring, 2022. Second movable ring, 3. Grouting hole, 4. Movable block, 5. First sealing ring, 6. Second sealing ring. Detailed Implementation

[0020] like Figures 1-4 As shown,

[0021] A tunnel grouting steel pipe includes two coaxial and spaced-apart steel pipes 1 and a connector 2 disposed between the two steel pipes 1 for connecting them. Each steel pipe 1 has a plurality of grouting holes 3 arranged in a regular pattern on its circumferential surface. The connector 2 includes a sleeve 201 coaxially disposed at the connection point of the two steel pipes 1 and a connecting ring 202 coaxially disposed within the inner ring of the sleeve 201. The outer diameter of the sleeve 201 is the same as the outer diameter of the two steel pipes 1. The two end faces of the connecting ring 202 extend axially from the sleeve 201 by a certain distance and are located within the adjacent steel pipe 1. The outer surface of the connecting ring 202 abuts against the inner surface of each steel pipe 1, and a plurality of movable blocks 4 (with springs between the movable blocks 4 and the connecting ring 202) are elastically inserted on the peripheral surface of the connecting ring 202 to cooperate with the grouting holes 3 on the surface of the adjacent steel pipe 1. Each movable block 4 is cylindrical, and the diameter of each movable block 4 is the same as the diameter of each grouting hole 3. Each movable block 4 moves radially along the connecting ring 202. When a plurality of movable blocks 4 simultaneously engage with the grouting holes 3 on the surface of the adjacent steel pipe 1, the sleeve 201 abuts against the two end faces of the steel pipe 1.

[0022] As shown in the diagram, when connecting two steel pipes 1, the end faces of both steel pipes 1 must first be ground flat (or, excessively long steel pipes can be cut and their cut surfaces ground flat). Then, one end of the connecting ring 202 is inserted axially into the interior of one of the steel pipes 1, while simultaneously pressing the movable block 4 to position it within the connecting ring 202. Subsequently, the inner wall of the steel pipe 1 will abut against one end of the movable block 4, maintaining its current state until the movable block 4 inserted into this steel pipe 1 mates with the corresponding grouting hole 3. One end of the movable block 4 extends out of the connecting ring 202 and engages with the grouting hole 3, and one end face of the sleeve 201 also abuts against the end face of this steel pipe 1. Figure 2 As shown, at least two grouting holes 3 on a steel pipe 1 are simultaneously engaged with corresponding movable blocks 4 on the connecting ring 202. The steel pipe 1 is fixedly connected to the connecting ring 202 and the sleeve 201 through the cooperation of the movable blocks 4 and the grouting holes 3, effectively preventing grout from leaking from the gap between the steel pipe 1 and the sleeve 201 during grouting. The connection steps between the connecting ring 202 and another steel pipe 1 are similar to the above operation steps. The sleeve 201 and the connecting ring 202 can quickly and efficiently fix the two steel pipes 1 together, and effectively seal the gap at the connection, ensuring normal operation during grouting. Furthermore, the two steel pipes 1 only need to have their end faces smoothed to achieve a fixed connection through the sleeve 201 and the connecting ring 202. The operation is simple and convenient, and can quickly and efficiently achieve a fixed connection between the two steel pipes 1.

[0023] In this embodiment, the outer surface of the connecting ring 202 is fitted with two first sealing rings 5 ​​respectively located at both ends of the sleeve 201. The first sealing rings 5 ​​are made of rubber material and have an "L" shaped vertical cross-section. The peripheral surface of the connecting ring 202 near both ends of the sleeve 201 is provided with an annular groove. One side surface of each first sealing ring 5 is fixedly connected to the sleeve 201, and the other side surface is located in the groove. A portion of the surface of the first sealing ring 5 protrudes from the groove.

[0024] As shown in the figure, when the movable block 4 on the surface of the connecting ring 202 engages with the grouting hole 3 on the surface of one of the steel pipes 1, the first sealing ring 5 made of rubber material will be simultaneously abutted by the end faces of the steel pipe 1 and the sleeve 201. The inner wall of the steel pipe 1 and the outer wall of the connecting ring 202 will also simultaneously abut the other side of the first sealing ring 5. This allows the first sealing ring 5 to fill the irregular gaps between the steel pipe 1 and the connecting ring 202 and the sleeve 201 in an elastic deformation manner. Furthermore, the first sealing ring 5, with its "L"-shaped cross-section, can effectively prevent the penetration of grout, thereby effectively improving the sealing performance between the steel pipe 1 and the sleeve 201 and ensuring the normal operation of grouting.

[0025] The connecting ring 202 includes a first movable ring 2021 and a second movable ring 2022 respectively movably disposed on the inner ring of the sleeve 201. The first movable ring 2021 and the second movable ring 2022 are symmetrically arranged about the vertical center line of the sleeve 201. The outer surfaces of the first movable ring 2021 and the second movable ring 2022 located inside the sleeve 201 are threadedly connected to the inner ring surface of the sleeve 201.

[0026] When the movable block 4 on the surface of the first movable ring 2021 engages with the grouting hole 3 on the surface of the corresponding steel pipe 1, the first movable ring 2021 is fixedly connected to the steel pipe 1. Then, the sleeve 201 is rotated clockwise, causing the sleeve 201 to move horizontally a short distance along its axial direction toward the steel pipe 1. This causes the two adjacent end faces of the sleeve 201 and the steel pipe 1 to jointly press the first sealing ring 5, allowing the first sealing ring 5 to further fill the gap between the end faces of the sleeve 201 and the steel pipe 1 through elastic deformation, effectively improving the sealing performance between the sleeve 201 and the steel pipe 1. The movement of the second movable ring 2022 is similar to that of the first movable ring 2021. The rotation angle of the first movable ring 2021 and the second movable ring 2022 does not exceed 30° to prevent excessive rotation and thus reduce the workload for construction personnel.

[0027] In this embodiment, the outer surfaces of the first movable ring 2021 and the second movable ring 2022 are each fitted with a second sealing ring 6 that abuts against the inner wall of the steel pipe 1. The second sealing ring 6 is also made of rubber material. The end faces of the first movable ring 2021 and the second movable ring 2022 near the adjacent steel pipe 1 are all chamfered. The end face of each movable block 4 away from the connecting ring 202 is also chamfered, and the chamfered surface matches the end face of the adjacent steel pipe 1.

[0028] As shown in the figure, when the first movable ring 2021 and the second movable ring 2022 extend into the inner ring of the corresponding steel pipe 1, the second sealing ring 6 fills the gap between the outer ring surface of the first movable ring 2021 and the second movable ring 2022 and the inner ring surface of the steel pipe 1 by plastic deformation, which can further improve the sealing performance and cooperate with the first sealing ring 5 to achieve a double-layer sealing effect. The chamfered setting of the movable block 4 can facilitate the insertion of the first movable ring 2021 and the second movable ring 2022 into the steel pipe 1, and the chamfered design of the end face of the first movable ring 2021 and the second movable ring 2022 can reduce the impact force on the end face of the first movable ring 2021 and the second movable ring 2022 when the slurry flows in the steel pipe 1, ensuring the connection stability between the sleeve 201 and the two steel pipes 1.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although the utility model has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of this utility model.

Claims

1. A tunnel grouting steel pipe, comprising two coaxial and spaced steel pipes (1) and a connector (2) disposed between the two steel pipes (1) for connecting the two, wherein each steel pipe (1) has a plurality of grouting holes (3) on its peripheral surface, characterized in that: The connector (2) includes a sleeve (201) coaxially disposed at the connection of two steel tubes (1) and a connecting ring (202) coaxially disposed within the inner ring of the sleeve (201). The diameter of the sleeve (201) is the same as the diameter of the two steel tubes (1). The two end faces of the connecting ring (202) extend axially from the sleeve (201) and are located within the adjacent steel tubes (1). The outer ring surface of the connecting ring (202) is flush with each steel tube. The inner ring surface of (1) abuts against each other, and the peripheral surface of the connecting ring (202) is elastically provided with a plurality of movable blocks (4) that cooperate with the grouting holes (3) on the surface of the adjacent steel pipe (1). Each of the movable blocks (4) moves radially along the connecting ring (202). When the plurality of movable blocks (4) simultaneously engage with the grouting holes (3) on the surface of the adjacent steel pipe (1), the sleeve (201) abuts against the two end faces of the steel pipe (1).

2. The tunnel grouting steel perforated pipe according to claim 1, characterized in that: The outer surface of the connecting ring (202) is fitted with two first sealing rings (5) respectively located at both ends of the sleeve (201). The vertical cross-section of the first sealing ring (5) is "L" shaped. The peripheral surface of the connecting ring (202) near both ends of the sleeve (201) is provided with annular grooves. One side surface of each first sealing ring (5) is fixedly connected to the sleeve (201), and the other side surface is set in the groove. A portion of the surface of the first sealing ring (5) protrudes out of the groove.

3. A tunnel grouting steel perforated pipe according to claim 2, characterized in that: The connecting ring (202) includes a first movable ring (2021) and a second movable ring (2022) respectively movably disposed on the inner ring of the sleeve (201). The first movable ring (2021) and the second movable ring (2022) are symmetrically disposed about the vertical center line of the sleeve (201). The outer ring surfaces of the first movable ring (2021) and the second movable ring (2022) are threadedly connected to the inner ring surface of the sleeve (201).

4. A tunnel grouting steel perforated pipe according to claim 3, characterized in that: The outer surfaces of the first movable ring (2021) and the second movable ring (2022) are fitted with a second sealing ring (6) that abuts against the inner wall of the steel flower tube (1). The end faces of the first movable ring (2021) and the second movable ring (2022) near the adjacent steel flower tube (1) are chamfered.

5. A tunnel grouting steel perforated pipe according to claim 4, characterized in that: Each of the movable blocks (4) has a chamfered end face away from the connecting ring (202), and the chamfered surface matches the end face of the adjacent steel pipe (1).

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