A prefabricated cable duct

Abstract

This utility model discloses a prefabricated cable duct, belonging to the field of power construction technology. It includes a cable duct body, which is a reinforced concrete component. Cable fittings are installed inside the cable duct. Connecting screws are cast on both sides of one end of the cable duct body, and the other end has an insertion hole that mates with the connecting fitting. A nut adjustment groove communicating with the insertion hole is opened on the side wall of the cable duct body, and a fastening nut that mates with the connecting screw is installed in the nut adjustment groove. This prefabricated cable duct has good structural strength, excellent connection performance of multiple prefabricated cable duct fittings, and further improves the standardization of power distribution network infrastructure operations, achieving a high degree of uniformity in processes and specifications, effectively improving construction quality and efficiency.

Description

Technical Field

[0001] This utility model belongs to the field of power construction technology, and specifically relates to a prefabricated cable duct. Background Technology

[0002] In recent years, with the rapid growth of the national economy and the continuous improvement of living standards, my country's electricity consumption has increased rapidly, leading to a sharp increase in the construction volume of supporting facilities for cable laying, such as power wells and power ducts. The traditional construction method for power wells involves excavation followed by concrete pouring, which has drawbacks such as high labor intensity, long construction periods, cumbersome acceptance of concealed works, and significant environmental pollution. This results in difficulties in ensuring project quality, slow project progress, and high construction costs, hindering the crucial role of power distribution network projects in ensuring the reliability of residential electricity supply. Furthermore, on-site pouring construction is easily limited by factors such as the site environment, transportation, cost, and efficiency. Summary of the Invention

[0003] The purpose of this invention is to provide a prefabricated cable duct to solve the problems existing in traditional cast-in-place cable ducts.

[0004] The objective of this utility model can be achieved through the following technical solution: a prefabricated cable duct, comprising a cable duct body, the cable duct body being a reinforced concrete component, cable fittings being provided inside the cable duct, connecting screws being cast on both sides of one end of the cable duct body, and an insertion hole being provided at the other end that can mate with the connecting fitting, and a nut adjustment groove communicating with the insertion hole being opened on the side wall of the cable duct body, and a fastening nut that mates with the connecting screw is provided in the nut adjustment groove.

[0005] Preferably, one end of the cable conduit protrudes relative to the cable duct body, and the other end is flush with the end of the cable duct body. The inner diameter of the end flush with the end of the cable duct body is the same as the outer diameter of the end protruding relative to the cable duct body.

[0006] Preferably, the cable conduit is an MPP pipe.

[0007] Preferably, the cable conduit includes power conduits and communication conduits, with the power conduits arranged in a 2x2 matrix array near one side of the cable conduit body, and the communication conduits arranged in a 2x1 array near the other side of the cable conduit body.

[0008] Preferably, the cable duct body has three layers of main reinforcement bars arranged along its length, with four bars evenly arranged in the upper and lower layers, and two bars evenly arranged in the middle layer. The three layers of main reinforcement bars are fixed by several stirrups.

[0009] Preferably, one end of the cable duct body is equipped with at least one positioning post, and the other end is provided with a corresponding positioning hole, so that the positioning post can be inserted for positioning when the two cable duct bodies are connected.

[0010] Preferably, at least one concealed lifting point is provided at each end of the upper surface of the cable duct body, and the concealed lifting point includes a groove and a lifting ring disposed in the groove.

[0011] Compared with existing technologies, this prefabricated cable duct has the following advantages: two adjacent prefabricated cable ducts are fixed by positioning posts and connecting bolts, making the connection more stable and reliable. Furthermore, one end of the connecting bolt is cast and the other end is adjusted by a nut, which not only ensures reliability but also provides a certain adjustment space, making the construction process simpler and more convenient. It also greatly reduces the impact of the site environment on the construction process, which helps to save construction costs and improve construction efficiency. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the prefabricated cable duct structure in the embodiment.

[0013] Figure 2 This is a schematic diagram of the front end structure of the prefabricated cable duct in the embodiment.

[0014] Figure 3 This is a schematic diagram of the rear end face structure of the prefabricated cable duct in the embodiment.

[0015] Figure 4 This is a schematic diagram of the structure when two prefabricated cable ducts are connected in the embodiment.

[0016] Figure 5 This is a schematic diagram of the structure after the two prefabricated cable ducts are connected in the embodiment.

[0017] In the diagram, 1. Cable duct body; 2. Connecting screw; 3. Insertion hole; 4. Nut adjustment groove; 5. Fastening nut; 6. Positioning post; 7. Positioning hole; 8. Power pipe; 9. Communication pipe; 10. Main reinforcement; 11. Stirrup; 12. Groove; 13. Lifting ring. Detailed Implementation

[0018] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0019] like Figure 1-5As shown, this utility model provides a prefabricated cable duct, including a cable duct body 1, which is a reinforced concrete component. Cable fittings are installed inside the cable duct. Connecting screws 2 are cast on both sides of the rear end of the cable duct body 1, and an insertion hole 3 is provided at the front end to mate with a connector. A nut adjustment groove 4 communicating with the insertion hole 3 is opened on the side wall of the cable duct body 1, and a fastening nut 5 mates with the connecting screws is installed in the nut adjustment groove 4. When two cable duct bodies 1 are joined, the connecting screw 2 on the first cable duct is inserted into the insertion hole 3 of the second cable duct, and then the fastening nut 5 is fixed to the connecting screw 2. The two cable ducts are then gradually tightened to secure them.

[0020] To ensure the strength of the connection between the two cable conduits and prevent collapse, at least one positioning post 6 is installed at one end of the cable conduit body 1, and a corresponding positioning hole 7 is opened at the other end. When the two cable conduit bodies 1 are joined, the positioning post 6 can be inserted into the positioning hole 7. The cooperation between the positioning post 6 and the positioning hole 7 increases the structural strength of the connection while ensuring positioning, effectively preventing the connection from collapsing.

[0021] Furthermore, to better ensure the connection between two adjacent cable ducts, the rear end of the cable fitting is designed to protrude relative to the cable duct body 1, while the front end is designed to be flush with the end of the cable duct body 1, with the inner diameter of the front end and the outer diameter of the rear end being the same. This allows the rear end of the cable fitting of the first cable duct to be inserted into the front end of the second cable duct when connecting the two cable ducts, thereby strengthening the connection and improving sealing. In this embodiment, the cable fitting is an MPP pipe. The cable fitting includes two types of pipes: power pipes 8 and communication pipes 9. The power pipes 8 are arranged in a 2x2 matrix array near the side of the cable duct body 1, with dimensions of an inner diameter of 175mm and a thickness of 8.5mm, and an inner diameter of 183.5mm at the front end. The communication pipes 9 are arranged in a 2x1 array near the other side of the cable duct body 1, with dimensions of an inner diameter of 100mm and a thickness of 5mm, and an inner diameter of 105mm at the front end.

[0022] Furthermore, to ensure the structural strength of the cable duct, three layers of main reinforcing bars 10 are arranged along its length inside the cable duct body 1. The upper and lower layers each have four main reinforcing bars 10 evenly distributed, while the middle layer has two. These three layers of main reinforcing bars 10 are fixed together by several stirrups 11 to form a cage structure, thereby improving the structural strength of the reinforced concrete component. In this embodiment, the diameter of the main reinforcing bars 10 and stirrups 11 is 25mm, and the concrete strength is C30.

[0023] To facilitate lifting and stacking during construction, this embodiment provides a concealed lifting point at each end of the upper surface of the cable duct body 1. The concealed lifting point includes a groove 12 and a lifting ring 13 disposed within the groove 12. The number of concealed lifting points can be adjusted adaptively according to actual needs and is not specifically limited.

[0024] 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 substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A prefabricated cable duct, characterized in that, The cable duct body (1) is a reinforced concrete component. The cable duct is equipped with cable fittings inside. Connecting screws (2) are cast on both sides of one end of the cable duct body (1), and the other end is provided with a socket (3) that can cooperate with the connector. A nut adjustment groove (4) communicating with the socket (3) is opened on the side wall of the cable duct body (1). A fastening nut (5) that cooperates with the connecting screw (2) is provided in the nut adjustment groove (4).

2. The prefabricated cable duct according to claim 1, characterized in that, One end of the cable fitting protrudes relative to the cable duct body (1), and the other end is flush with the end of the cable duct body (1). The inner diameter of the end flush with the end of the cable duct body (1) is the same as the outer diameter of the end protruding relative to the cable duct body (1).

3. A prefabricated cable duct according to claim 1 or 2, characterized in that, The cable conduit is an MPP pipe.

4. A prefabricated cable duct according to claim 1 or 2, characterized in that, The cable conduit includes a power conduit (8) and a communication conduit (9). The power conduit (8) is arranged in a 2x2 matrix array near the side of the cable conduit body (1), and the communication conduit (9) is arranged in a 2x1 array near the other side of the cable conduit body (1).

5. A prefabricated cable duct according to claim 1 or 2, characterized in that, The cable duct body (1) is provided with three layers of main reinforcement (10) arranged along its length. The upper layer main reinforcement (10) and the lower layer main reinforcement (10) are evenly arranged with four bars, the middle layer main reinforcement (10) is evenly arranged with two bars, and the three layers of main reinforcement (10) are fixed by several stirrups (11).

6. A prefabricated cable duct according to claim 1 or 2, characterized in that, At least one positioning post (6) is installed at one end of the cable duct body (1), and a corresponding positioning hole (7) is opened at the other end. When two cable duct bodies (1) are connected, the positioning post (6) can be inserted for positioning.

7. A prefabricated cable duct according to claim 1 or 2, characterized in that, At least one concealed lifting point is provided at both ends of the upper surface of the cable duct body (1), and the concealed lifting point includes a groove (12) and a lifting ring (13) disposed in the groove (12).

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