Directly-buried assembly type cable duct bank

Abstract

The utility model relates to the technical field of power construction, and discloses a directly-buried assembly type cable duct bank which comprises a plurality of cable duct bank units which are coupled and spliced with one another, two ends of each cable duct bank unit are provided with concrete envelopes with rectangular sections, the side face of the concrete envelope at one end is L-shaped and is provided with a bolt, and the other end is inverted-L-shaped and is provided with a corresponding bolt hole. The concrete of the adjacent cable duct bank units is encapsulated and overlapped, and the bolts are inserted into the bolt holes to fix the adjacent cable duct bank units; a plurality of pipe penetrating through holes are evenly and correspondingly formed in the concrete packages at the two ends, and pipe fittings penetrating into the pipe penetrating through holes are arranged between the two concrete packages. A plurality of embedded bolts are arranged on the two sides of the concrete packages and used for fixedly connecting the steel channels of the two concrete packages. The directly-buried assembly type cable duct bank provided by the utility model comprises the concrete envelopes at the two ends and the pipes which are not wrapped with the concrete, the concrete envelopes and the pipes are fixedly connected through the channel steel fixed on the two sides of the concrete envelopes, the overall weight is light, site construction is facilitated, installation is convenient and fast, and the construction cost is reduced.

Description

Technical Field

[0001] This utility model relates to the field of power construction technology, and in particular to a direct-buried prefabricated cable duct. Background Technology

[0002] With economic development and social progress, urban construction land is becoming increasingly scarce, and overhead power lines in urban areas and development zones are now primarily laid using cables. The main carriers for cable laying include cable ducts, cable trenches, cable tunnels, and integrated utility tunnels.

[0003] The main problems with existing cable duct technology are:

[0004] 1. On-site concrete pouring construction results in a long construction period, high labor intensity for workers, and construction quality that depends on the skill level of the construction team and cannot be effectively controlled. It also occupies public areas for a long time, which not only affects municipal traffic and pedestrian safety, but also causes a lot of construction waste and dust, making it a major source of particulate pollution in the city.

[0005] 2. Precast as a whole: This method involves a large amount of concrete and steel reinforcement, resulting in a large self-weight of individual components and requiring high-performance hoisting equipment. Summary of the Invention

[0006] In order to overcome or alleviate one or more of the above-mentioned technical problems, the purpose of this utility model is to provide a direct-buried prefabricated cable duct. The cable duct unit includes concrete encapsulation at both ends and unencapsulated pipes, which are fixedly connected by channel steel fixed to both sides of the concrete encapsulation. The overall weight is light, which is convenient for on-site construction, and the installation is convenient and quick, thus reducing construction costs.

[0007] This utility model provides the following technical solution:

[0008] This utility model provides a direct-buried prefabricated cable duct, characterized in that: it includes multiple cable duct units coupled and spliced ​​together, each cable duct unit has a rectangular concrete enclosure (1) at both ends, one end of the concrete enclosure (1) is L-shaped with a pin (5), and the other end is inverted L-shaped with a corresponding pin hole (4), the concrete enclosures (1) of adjacent cable duct units overlap, the pin (5) is inserted into the pin hole (4) to fix the adjacent cable duct units; several through holes (11) are evenly distributed on both ends of the concrete enclosures (1), and a pipe fitting (2) is provided between the two concrete enclosures (1) to pass through the through holes (11); several pre-embedded bolts (7) are provided on both sides of the concrete enclosures (1), and the pre-embedded bolts (7) are used to fix the channel steel (3) connecting the two concrete enclosures (1).

[0009] In the above embodiment, only the two ends are enclosed with rectangular concrete, while there is no concrete enclosed in the middle, which greatly reduces the weight of the cable duct and facilitates on-site construction and installation.

[0010] According to some implementation methods, multiple pairs of pins (5) and pin holes (4) are provided on the concrete enclosure (1) at both ends.

[0011] According to some embodiments, the top of the concrete enclosure (1) is provided with hanging nails (6).

[0012] According to some embodiments, the top of the concrete enclosure (1) is provided with a grounding steel plate (8), which is connected to the reinforcing mesh in the concrete enclosure (1).

[0013] According to some embodiments, a waterproof groove (9) is provided on one end face of the concrete enclosure (1), and a waterproof strip is provided in the waterproof groove (9).

[0014] According to some embodiments, the pipe fitting (2) is secured by one or more side-by-side pipe supports (10).

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. Direct-buried prefabricated cable ducts are prefabricated cable ducts. After the cable duct units are prefabricated in the factory, they are transported to the site for installation, which greatly saves the construction period and has little environmental pollution and impact on municipal traffic.

[0017] 2. Direct-buried prefabricated cable ducts are pre-produced in the factory. Through assembly line operations and quality inspections, quality can be better controlled, and the labor intensity of workers on the construction site can be reduced.

[0018] 3. Direct-buried prefabricated cable ducts only have concrete at both ends, which greatly reduces the amount of concrete and steel bars used, making them lighter and easier to hoist and install. Attached Figure Description

[0019] Figure 1A This is a schematic diagram of the end cross-section of the cable duct unit provided in Embodiment 1 of this utility model.

[0020] Figure 1B This is a side cross-sectional view of the cable duct unit provided in Embodiment 1 of this utility model.

[0021] Figure 1C This is a schematic diagram of the reinforcing steel bars encased in concrete for the cable duct unit provided in Embodiment 1 of this utility model.

[0022] Figure 1D This is a top view of the cable duct unit provided in Embodiment 1 of this utility model.

[0023] Figure 1E This is a schematic diagram of the end of the cable duct unit provided in Embodiment 1 of this utility model.

[0024] Figure 2A This is a schematic diagram of the end cross-section of the cable duct unit provided in Embodiment 2 of this utility model.

[0025] Figure 2B This is a side cross-sectional view of the cable duct unit provided in Embodiment 2 of this utility model.

[0026] Figure 2C This is a top view of the cable duct unit provided in Embodiment 2 of this utility model.

[0027] Figure 2D This is a schematic diagram of the end of the concrete enclosure of the cable duct unit provided in Embodiment 2 of this utility model.

[0028] Figure 3 This is a schematic diagram of the end cross-section of the cable duct unit provided in Embodiment 3 of this utility model.

[0029] Figure 4 This is a schematic diagram of the installation and construction of the cable duct unit provided in Embodiment 1 of this utility model.

[0030] In the picture:

[0031] 1. Concrete encapsulation; 11. Pipe through hole; 12. Pipe fitting; 2. Channel steel; 3. Pin hole; 4. Pin; 5. Hanging nail; 6. Embedded bolt; 7. Grounding steel plate; 8. Waterproof groove; 9. Pipe rest; 10. Detailed Implementation

[0032] The present invention will now be described in detail with reference to the embodiments and accompanying drawings. However, it should be understood that the embodiments and accompanying drawings are for illustrative purposes only and do not constitute any limitation on the scope of protection of the present invention. All reasonable modifications and combinations that fall within the inventive spirit of the present invention are within the scope of protection of the present invention.

[0033] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," "outer," "front," and "rear," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0034] The present invention will be further described below with reference to the accompanying drawings.

[0035] Example 1

[0036] like Figure 1A and 1B This embodiment provides a direct-buried prefabricated cable duct, which is assembled from multiple cable duct units. Each cable duct unit has a rectangular cross-section with concrete enclosures 1 at both ends. The concrete enclosures 1 contain 6 through holes 11 and 2 through holes 12. The through holes 12 are for placing communication optical cables, and the through holes 11 are for placing electrical cables. One side of the concrete enclosure 1 is L-shaped, and the other side is an inverted L-shape. The concrete enclosures 1 of adjacent cable duct units are staggered and coupled. Six pipe fittings 2 are installed in the middle section of each cable duct unit, with 3 pipe fittings 2 on each side. Cables are threaded through the pipe fittings 2. The ends of the pipe fittings 2 are connected to the concrete enclosures 1, but the middle section of the pipe fittings 2 is not surrounded by concrete. Pipe supports 10 have through holes corresponding to the pipe fittings 2. Depending on the length of the pipe fitting 2, it is fixed by one or more parallel pipe supports 10 and directly buried underground. Figure 1C The concrete enclosure 1 is made by pouring concrete with a steel mesh and using a mold.

[0037] By changing the above structural form, the self-weight of the cable duct unit is greatly reduced, making it easier to install and transport, and requiring less hoisting equipment.

[0038] Waterproof design: such as Figure 1E The cable duct unit has a waterproof groove 9 on one side of the pre-embedded pin 5. The waterproof groove 9 is reserved for the position of the waterproof strip. After the cable duct unit is transported to the site, the annular waterproof strip is installed first, and then the assembly is carried out.

[0039] Connection Design: The front and rear ends of the cable duct unit are set in an L-shape, similar to a "step," and are staggered together to form a complete rectangle. For example... Figure 4 (a) and Figure 4 (b) Set a pin hole 4 at one end of the cable duct unit and pre-embed a bolt as a pin 5 at the other end. After the first cable duct unit is installed, use the pin hole 4 of the second cable duct unit to align with the pre-embedded pin 5 of the first cable duct unit. After alignment, pass through. At this time, the positioning and installation are completed. After hoisting, tighten the nut and fill the pin hole 4 with structural adhesive for sealing.

[0040] Lifting design: such as Figure 1D The top of the concrete enclosure 1 at both ends of the cable duct unit is equipped with round-headed lifting nails 6, which are used with duckbill hook lifting tools during hoisting. Since there is no concrete in the middle of the cable duct unit, in order to prevent the pipe from deforming during hoisting, there are pre-embedded bolts 7 on the side walls of the concrete enclosure 1 at both ends to fix the channel steel 3 (arranged along the length of the standard prefabricated cable duct component). The channel steel 3 can be removed after each hoisting and can be reused.

[0041] Grounding design: The top of the concrete enclosure 1 at both ends has a pre-embedded grounding steel plate, which is connected to the internal steel mesh of the concrete enclosure 1 to facilitate grounding after assembly.

[0042] like Figure 4 During installation, since the cable duct unit only has concrete encapsulation 1 at both ends, two channel steels 3 need to be added to the side wall of the concrete encapsulation 1 to assist in hoisting (to prevent damage to the pipe during hoisting). The concrete encapsulation 1 is installed on the dry hard mortar of the installation surface. After the first cable duct unit is installed, the channel steels 3 on the side wall are removed and installed on the second cable duct unit. The pin hole 4 of the second cable duct unit is then aligned with the pre-embedded pin 5 of the first cable duct unit. After assembly, the nuts are tightened and the structural adhesive is filled to seal. Then the channel steels 3 on the side wall are removed, and the installation is complete.

[0043] Example 2

[0044] like Figures 2A-2D This embodiment provides another type of direct-buried prefabricated cable duct, which has 9 through holes 11 and 2 through holes 12 at the top inside the concrete enclosure 1. Correspondingly, two pairs of coupling pin holes 4 and pins 5 are also provided.

[0045] Example 3

[0046] like Figure 3 This embodiment provides a direct-buried assembled cable duct, which includes 4 rows and 3 columns of through holes 11 and 2 through holes 12, and two pairs of corresponding coupling pin holes 4 and pins 5 are also provided.

[0047] The cables inserted in Examples 2 and 3 have a larger capacity. The layout of the through holes 11 can be flexibly configured according to actual needs and is not limited to the examples provided in this application.

[0048] The above embodiments are merely preferred embodiments of this utility model, and the protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are within its protection scope. It should be noted that improvements and modifications made by those skilled in the art without departing from the principle of this invention should also be considered within the protection scope of this utility model.

Claims

1. A direct-buried prefabricated cable duct, characterized in that: The system includes multiple cable duct units that are coupled and spliced ​​together. Each cable duct unit has a rectangular concrete enclosure (1) at both ends. One end of the concrete enclosure (1) is L-shaped and has a pin (5). The other end is inverted L-shaped and has a corresponding pin hole (4). The concrete enclosures (1) of adjacent cable duct units overlap, and the pin (5) is inserted into the pin hole (4) to fix the adjacent cable duct units. Several through holes (11) are evenly distributed on both ends of the concrete enclosures (1). A pipe fitting (2) is provided between the two concrete enclosures (1) and passes through the through holes (11). Several embedded bolts (7) are provided on both sides of the concrete enclosures (1). The embedded bolts (7) are used to fix the channel steel (3) connecting the two concrete enclosures (1).

2. The direct-buried prefabricated cable duct according to claim 1, characterized in that: Multiple pairs of pins (5) and pin holes (4) are provided on the concrete enclosure (1) at both ends.

3. The direct-buried prefabricated cable duct according to claim 1, characterized in that: The top of each concrete enclosure (1) is provided with a hanging nail (6).

4. The direct-buried prefabricated cable duct according to claim 3, characterized in that: The top of the concrete enclosure (1) is provided with a grounding steel plate (8), which is connected to the steel mesh in the concrete enclosure (1).

5. The direct-buried prefabricated cable duct according to claim 4, characterized in that: The concrete enclosure (1) has a waterproof groove (9) on one end face, and the waterproof groove (9) is provided with a waterproof strip.

6. The direct-buried prefabricated cable duct according to any one of claims 1 to 5, characterized in that: The pipe fitting (2) is secured by one or more side-by-side pipe supports (10).

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