Embedded sleeve with anti-inclination structure and duct piece

Abstract

The utility model discloses an embedded sleeve of an anti-inclination structure and a pipe piece. The embedded sleeve comprises a rod body with a threaded hole in the lower portion, the lower portion of the rod body is provided with a barrel body integrally formed with the rod body in a casting mode, and the barrel body is of a big-end-up structure with the lower end closed. The pipe piece comprises a pre-embedded sleeve and a reinforcement cage which are pre-embedded in the concrete base body, the end face of the threaded hole is located on the surface of the concrete base body, and a pipe hole matched with the positioning screw rod in position is formed in the surface of the steel mold. The device has the advantages that firstly, the cavity of the conical barrel body can be filled with concrete during pouring to form an n-shaped structure, so that the pre-embedded sleeve can be firmly pressed, and the whole sleeve is not easy to deviate, incline and float; secondly, due to the arrangement of the anti-rotation ribs, the pre-embedded sleeve is effectively prevented from rotating in the construction process; in addition, a pipe hole is formed in the steel die and can be in interference fit with the positioning screw rod, and the stability of the whole structure is further improved.

Description

Technical Field

[0001] The utility model relates to a pipe segment for urban rail transit and a component structure thereof, in particular to a pre-buried sleeve and a pipe segment with an anti-tilt structure. Background Art

[0002] In tunnel and underground projects, segments are essential supporting structures for urban rail transit, and their design and construction directly impact the project's safety and stability. Traditional segments, when connected to embedded sleeves, often feature smooth or straight-through designs, often lacking effective anti-tilt features. These connections are susceptible to installation errors and force variations, leading to increased maintenance and repair costs and impacting overall project efficiency. This deficiency presents many projects with stability challenges under extreme conditions. Therefore, there is an urgent need to develop a simpler, more reliable connection solution to enhance segment stability, improve construction efficiency, and ensure the safety and durability of underground projects in various environments. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to provide a pre-buried sleeve and pipe segment with an anti-tilt structure, so as to solve the problem that the sleeve is offset during concrete vibration or is easily pulled out when connected with bolts.

[0004] In order to solve the above technical problems, the embedded sleeve with an anti-tilt structure of the utility model includes a rod body with a threaded hole at the bottom, and the lower part of the rod body has a barrel body cast integrally with it, and the barrel body has a structure that is larger at the top and smaller at the bottom and has a closed lower end.

[0005] The upper end of the rod body is provided with a head with a diameter larger than that of the rod body.

[0006] The cross-sectional shape of the head is circular or square.

[0007] The outer surface of the barrel is conical.

[0008] The rod body is screwed to the positioning screw, the upper section of the positioning screw is a threaded section, and the lower section is a cylindrical section, and the threaded section is screwed to the threaded hole.

[0009] An operating groove is formed on the lower end surface of the cylindrical section.

[0010] Anti-rotation ribs are provided on the outside of the barrel body.

[0011] The anti-rotation ribs are evenly distributed along the barrel body.

[0012] The pipe segment with embedded sleeve includes an embedded sleeve embedded in the concrete matrix and a steel mold located on one side surface. The end face of the threaded hole is located on the surface of the concrete matrix, and the surface of the steel mold is provided with a pipe hole that matches the position of the positioning screw.

[0013] The cylindrical section of the positioning screw is fixed to the pipe hole through interference fit.

[0014] The advantages of this utility model are: First, during concrete pouring, the cavity of the conical barrel can be filled, forming a "J"-shaped structure, which can firmly press the embedded sleeve and prevent the embedded sleeve from shifting, tilting, or floating. Second, the provision of anti-rotation ribs effectively prevents the embedded sleeve from rotating during construction. In addition, the pipe holes in the tunnel segment steel mold can be interference-fitted with the positioning screws, further improving the stability of the overall structure. In summary, this embedded sleeve and segment can provide a stronger fixation effect during construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a front view schematic diagram of the embedded sleeve with an anti-tilt structure of the utility model;

[0016] Figure 2 This is a bottom perspective diagram of the embedded sleeve with an anti-tilt structure of the utility model;

[0017] Figure 3 This is a cross-sectional view of the pipe segment of the utility model in use;

[0018] Figure 4 A top view of the pipe segment of the utility model in use;

[0019] Figure 5 This is a bottom view of the embedded sleeve with an anti-tilt structure and the positioning screw of the pipe segment of the utility model. DETAILED DESCRIPTION

[0020] The embedded sleeve and pipe segment with anti-tilt structure of the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. Example 1:

[0021] like Figure 1 、 Figure 2The cam 2 is provided with a screw thread hole 3 at the bottom, and the upper end of the cam 2 is provided with a head 1 with a diameter larger than that of the cam 2. The cross-sectional shape of the head 1 can be round or square. The lower part of the cam 2 is provided with a barrel 4 cast integrally therewith. The barrel 4 is a structure that is larger at the top and smaller at the bottom and closed at the lower end. A cavity is formed in the barrel 4. When concrete is poured, the cavity will be filled with a "J"-shaped structure, which firmly presses the entire sleeve body to make its positioning more stable and not loose. The outer surface of the barrel 4 is a cone with a larger top and a smaller bottom to increase the contact area. The outside of the barrel 4 is provided with no less than three anti-rotation ribs 12 and evenly distributed along the cam 2. When the concrete is poured and vibrated, the sleeve body can be effectively prevented from rotating along the axis and damaging the thread in the rod. At the same time, the dead weight of the embedded sleeve is also increased to effectively prevent tilting and floating during vibration, thereby ensuring the subsequent connection accuracy with the external hanging channel or bracket. Figure 3 、 Figure 5 As shown, the rod body 2 is screwed with the positioning screw 5, the upper section of the positioning screw 5 is a threaded section 6, and the lower section is a cylindrical section 7. The threaded section 6 is screwed with the threaded hole 3, and the lower end surface of the cylindrical section 7 is provided with an operating groove 8 for use with relevant tools to facilitate unscrewing; Figure 3 、 Figure 4 As shown, it is a pipe segment with an embedded sleeve. The pipe segment 9 includes an embedded sleeve embedded in the concrete matrix 91 and a steel mold 10 located on one side surface. The end face of the threaded hole 3 is located on the surface of the concrete matrix 91. The surface of the steel mold 10 is provided with a pipe hole 11 that matches the position of the positioning screw 5. The cylindrical section 7 is fixed with the pipe hole 11 by interference fit, and the head 1 of the rod body 2 can be hammered to accurately position the rod body 2.

[0022] The usage process of the present utility model is as follows: first, the threaded end 6 of the positioning screw 5 is screwed together with the threaded hole 3 of the rod body 2, the positioning screw 5 is matched with the pipe hole 11 and fixed on the steel mold with an interference fit, and then the steel cage is placed, and then the concrete is poured from top to bottom to form the pipe segment; after the pipe segment is demolded and cured, it is transported to the shield construction site for assembly, and a tool is used to insert the operating slot 8 of the positioning screw 5 to unscrew the positioning screw 5, so as to facilitate subsequent connection operations such as external channels or electromechanical equipment brackets.

Claims

1. An embedded sleeve with an anti-tilt structure, characterized in that: It comprises a rod body (2) having a threaded hole (3) at the bottom, the rod body (2) having a barrel body (4) integrally cast therewith at the bottom, the barrel body (4) being a structure that is larger at the top and smaller at the bottom and has a closed lower end.

2. The embedded sleeve with an anti-tilt structure according to claim 1, characterized in that: The upper end of the rod body (2) is provided with a head (1) having a diameter larger than that of the rod body (2).

3. The embedded sleeve with an anti-tilt structure according to claim 2, characterized in that: The cross-sectional shape of the head (1) is circular or square.

4. The embedded sleeve with an anti-tilt structure according to claim 1, characterized in that: The outer surface of the barrel (4) is conical.

5. The embedded sleeve with an anti-tilt structure according to claim 1 or 2, characterized in that: A positioning screw (5) is screwed into the threaded hole (3), and the upper section of the positioning screw (5) is a threaded section (6), and the lower section is a cylindrical section (7).

6. The embedded sleeve with an anti-tilt structure according to claim 5, characterized in that: An operating groove (8) is formed on the lower end surface of the cylindrical section (7).

7. The embedded sleeve with an anti-tilt structure according to claim 1, characterized in that: Anti-rotation ribs (12) are provided on the outside of the barrel body (4).

8. The embedded sleeve with an anti-tilt structure according to claim 7, characterized in that: The anti-rotation ribs (12) are evenly distributed along the barrel body (4).

9. A pipe segment having the embedded sleeve according to any one of claims 1 to 8, characterized in that: The pipe segment (9) comprises a pre-embedded sleeve pre-embedded in a concrete matrix (91) and a steel mold (10) located on one side surface. The end face of the threaded hole (3) is located on the surface of the concrete matrix (91). The surface of the steel mold (10) is provided with a pipe hole (11) that matches the position of the positioning screw (5).

10. The segment according to claim 9, characterized in that: The cylindrical section (7) of the positioning screw is fixed with the tube hole (11) by interference fit.

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