Prefabricated duct bank unit and cable duct bank

Abstract

The invention provides a prefabricated calandria unit which comprises an upper calandria pipe beam, a lower calandria pipe beam and a vertical connection structure, the upper calandria pipe beam and the lower calandria pipe beam are vertically opposite and parallel to each other, the upper end and the lower end of the vertical connection structure are connected with the upper calandria pipe beam and the lower calandria pipe beam respectively, and a cable laying channel is at least arranged in the upper calandria pipe beam. The two ends of the upper row of pipe beams and the two ends of the lower row of pipe beams are provided with beam end connecting parts used for being spliced with the adjacent row of pipe units respectively. In addition, the invention also relates to a cable duct bank formed by splicing the prefabricated duct bank units. In the invention, the prefabricated calandria unit comprises the upper calandria pipe beam and the lower calandria pipe beam, and the upper calandria pipe beam and the lower calandria pipe beam are connected through the vertical connection structure, so that the prefabricated calandria pipe meets the stress requirement of overhead laying, and a plurality of the calandria pipe units can be spliced to form a bridge type calandria to meet the overhead laying requirement of a cable; the cable laying device is suitable for situations that cables are not easy to lay or cannot be laid in the ground, for example, river-crossing laying of the cables is achieved, and laying construction and later maintenance of the cables are facilitated.

Description

Technical Field

[0001] The present invention belongs to the technical field of electric power engineering, and particularly relates to a prefabricated pipe unit and a cable pipe formed by splicing the prefabricated pipe units. Background Art

[0002] At present, when cables are laid over a long distance, they are generally laid underground, that is, the cables are laid underground. Usually, cable pipes are buried underground and the cables are laid through the cable pipes. The cable pipes can protect the cables and have the characteristics of waterproof, fireproof, and corrosion-proof. This underground laying method does not occupy the ground space, is beautiful and durable. However, it also has problems such as difficult later maintenance. When in some cross-water areas such as cross-river and cross-lake areas or areas with complex geological conditions, it is not easy to lay the cables underground, and the underground laying cost is relatively high. Summary of the Invention

[0003] In view of the technical defects and drawbacks existing in the prior art, embodiments of the present invention provide a prefabricated pipe unit and a cable pipe formed by splicing the prefabricated pipe units to overcome or at least partially solve the above problems.

[0004] The above prefabricated pipe unit includes an upper pipe beam, a lower pipe beam, and a vertical connection structure. The upper pipe beam and the lower pipe beam are opposite and parallel to each other up and down. The upper and lower ends of the vertical connection structure are respectively connected to the upper pipe beam and the lower pipe beam. At least a cable laying channel is provided in the upper pipe beam. Beam end connection parts for splicing with adjacent pipe units are respectively provided at both ends of the upper pipe beam and both ends of the lower pipe beam.

[0005] Preferably, the vertical connection structure includes a web plate, and the plate surface of the web plate is perpendicular to the beam width direction of the upper pipe beam.

[0006] Preferably, a plurality of hollow holes are provided on the web plate, and the hollow holes penetrate through both plate surfaces of the web plate.

[0007] Preferably, the upper end of the web plate is an upwardly tapered structure, and / or the lower end of the web plate is a downwardly tapered structure.

[0008] Preferably, when the upper end of the web plate is an upwardly tapered structure, an auxiliary laying hole suitable for laying weak current lines and / or optical cables is provided at the upper end of the web plate; when the lower end of the web plate is a downwardly tapered structure, an auxiliary laying hole suitable for laying weak current lines and / or optical cables is provided at the lower end of the web plate.

[0009] Preferably, the cable laying channel in the upper pipe beam includes a plurality of cable laying holes; and / or when a cable laying channel is provided in the lower pipe beam, it includes a plurality of cable laying holes.

[0010] Preferably, the beam end connection part is a flange connection part.

[0011] Preferably, prestressed steel bars are provided in the lower row of pipe beams.

[0012] The present invention also provides a cable duct bank, which includes a plurality of the above-mentioned prefabricated duct units. Each of the prefabricated duct units is spliced in sequence. Among two adjacent prefabricated duct units, the upper row of pipe beams of the two are spliced, and the lower row of pipe beams of the two are spliced.

[0013] Preferably, the cable duct bank is arranged overhead.

[0014] The present invention has the following beneficial effects:

[0015] In the present invention, the prefabricated duct unit includes an upper row of pipe beam and a lower row of pipe beam, and the upper row of pipe beam and the lower row of pipe beam are connected by a vertical connection structure, so as to meet the stress requirements of overhead laying. Thus, a bridge-type duct can be formed by splicing a plurality of such duct units. The combination form of the upper row of pipe beam + vertical connection structure + lower row of pipe beam is similar to the "I"-shaped beam in steel structures. According to the needs of the span, when the span becomes larger, the height and thickness of the vertical connection structure can be increased, including the amount of steel reinforcement in the concrete, etc., which is convenient for the overhead laying requirements of cables and can be applicable to situations where cables are not easy or cannot be laid underground, such as realizing the cross-river laying of cables, which is convenient for the laying construction and later maintenance of cables. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 and Figure 2 is a schematic structural diagram of a prefabricated duct unit provided by an embodiment of the present invention;

[0017] Figure 3 is a side view of a prefabricated duct unit provided by an embodiment of the present invention;

[0018] Figure 4 is a schematic structural diagram of a cable duct bank provided by an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.

[0020] Embodiment 1

[0021] As Figures 1-3As shown, the prefabricated pipe row unit 1 provided in this embodiment includes an upper pipe row beam 11, a lower pipe row beam 12, and a vertical connection structure. The upper pipe row beam 11 and the lower pipe row beam 12 are opposite and parallel to each other up and down. The upper and lower ends of the vertical connection structure are respectively connected to the upper pipe row beam 11 and the lower pipe row beam 12. At least a cable laying channel is provided in the upper pipe row beam 11. Beam end connection parts 14 for splicing with adjacent pipe row units 1 are respectively provided at both ends of the upper pipe row beam 11 and both ends of the lower pipe row beam 12.

[0022] In one embodiment, as Figures 1-4 , the beam end connection part 14 is a flange connection part, and two adjacent pipe row units 1 are flange-connected, which is relatively convenient for operation. Further, the flange holes are countersunk holes. After bolt connection, the countersunk holes can be blocked, including but not limited to pouring concrete in the countersunk holes for blocking, which can prevent bolt corrosion.

[0023] The above pipe row unit 1 is preferably a concrete structure, and more preferably a reinforced concrete structure.

[0024] The upper pipe row beam 11, the lower pipe row beam 12, and the vertical connection structure are preferably integrally prefabricated and formed to ensure the structural performance of the pipe row unit 1.

[0025] In one embodiment, as Figures 1-3 , the vertical connection structure includes a web 13, and the plate surface of the web 13 is perpendicular to the beam width direction of the upper pipe row beam 11. After the above pipe row unit 1 is installed in place, the plate surface of the above web 13 is generally parallel to the vertical direction. The thickness of the above web 13 is less than the beam width of the upper pipe row beam 11 and the beam width of the lower pipe row beam 12. Among them, the web 13 is preferably connected to the middle of the upper pipe row beam 11 and the middle of the lower pipe row beam 12.

[0026] Further preferably, as Figure 1 and Figure 2 , a plurality of hollow holes 130 are provided on the web 13, and the hollow holes 130 penetrate through both plate surfaces of the web 13. On the one hand, this can reduce the weight of the web 13 and the pipe row unit 1. More importantly, when the above pipe row unit 1 is arranged overhead, the hollowing of the web 13 can reduce the adverse effect of wind load and improve the safety and reliability of the overhead layout of large-span cable pipes.

[0027] Optionally, as Figures 1-3 , the upper end of the web 13 is a structure that gradually expands upward, and / or the lower end of the web 13 is a structure that gradually expands downward. This design can improve the structural strength and stiffness at the connection between the web 13 and the upper pipe row beam 11 and between the web 13 and the lower pipe row beam 12, and ensure the structural performance and load-bearing capacity of the pipe row unit 1.

[0028] Further preferably, asFigures 1-3 When the upper end of the web 13 is a structure that gradually expands upward, an auxiliary laying hole 16 suitable for laying weak current lines and / or optical cables is provided at the upper end of the web 13; when the lower end of the web 13 is a structure that gradually expands downward, an auxiliary laying hole 16 suitable for laying weak current lines and / or optical cables is provided at the lower end of the web 13. Thus, while achieving the above effects such as "ensuring the structural performance and load-bearing capacity of the pipe laying unit 1", it also facilitates the line laying in the pipe laying unit 1.

[0029] In one embodiment, such as Figures 1-3 The lower pipe beam 12 is also provided with a cable laying channel. Thus, the above pipe laying unit 1 can meet the laying of single-circuit cables and can also meet the laying of double-circuit cables, with relatively high flexibility. Preferably, the cable laying channel in the lower pipe beam 12 includes a plurality of cable laying holes 15, and among them, the cable laying holes 15 in the lower pipe beam 12 are preferably arranged in sequence along the beam width direction.

[0030] In another embodiment, the lower pipe beam 12 can be used as a spare cable channel and can play a role when performing later maintenance and replacement or adding new power distribution capacity.

[0031] In one embodiment, such as Figures 1-3 The cable laying channel in the upper pipe beam 11 includes a plurality of cable laying holes 15, and among them, the cable laying holes 15 in the upper pipe beam 11 are preferably arranged in sequence along the beam width direction. In another embodiment, the cable laying channel in the upper pipe beam 11 can also adopt the form of a cable trough, and the top opening of the cable trough can be closed by a cover plate or the like.

[0032] For the above pipe laying unit 1, the lengths of the upper pipe beam 11 and the lower pipe beam 12 can be the same or different; the beam widths of the upper pipe beam 11 and the lower pipe beam 12 can be the same or different; the upper pipe beam 11 and the lower pipe beam 12 can be end-aligned or end-displaced. In Figure 1 and Figure 2In the shown structure, the upper row of pipe beams 11 and the lower row of pipe beams 12 have the same length, the same beam width, and are aligned at both ends. In another embodiment, the ends of the upper row of pipe beams 11 and the lower row of pipe beams 12 are misaligned. Preferably, the pipe row unit 1 is generally in a Z-shaped structure (viewed from the projection of the pipe row unit 1 on the horizontal plane, the first end of the upper row of pipe beams 11, the first end of the lower row of pipe beams 12, the second end of the upper row of pipe beams 11, and the second end of the lower row of pipe beams 12 are arranged in a straight line in sequence). Based on this design, on the one hand, the shear force received by bolts and the like at the splicing joint of the pipe row unit 1 can be effectively reduced, the application reliability of the cable pipe row can be improved, and the maintenance frequency can be reduced; on the other hand, during the splicing construction of the pipe row unit 1, based on the above structure, adjacent two pipe row units 1 can be pre-positioned, improving the construction efficiency and construction quality. In particular, when two pipe row units 1 are used for crossing laying, one of the pipe row units 1 can be fixed first, and the two ends of the other pipe row unit 1 can be respectively placed on the installed pipe row unit 1 and the corresponding side foundation, which can effectively improve the construction efficiency and reduce the hoisting construction situation.

[0033] Optionally, prestressed steel bars are provided in the lower row of pipe beams 12, which can greatly reduce the structural deflection, improve the structural reliability and operation safety of the cable pipe row for overhead laying, especially for large-span and extra-large-span crossing laying projects.

[0034] Embodiment 2

[0035] As Figure 4 , an embodiment of the present invention provides a cable pipe row, including a plurality of the prefabricated pipe row units 1 provided in the above Embodiment 1. Each of the prefabricated pipe row units 1 is spliced in sequence. Among adjacent two prefabricated pipe row units 1, the upper row of pipe beams 11 of the two are spliced, and the lower row of pipe beams 12 of the two are spliced.

[0036] Among them, the cable laying channels in the upper row of pipe beams 11 are connected; when there are also cable laying channels in the lower row of pipe beams 12, the cable laying channels in the lower row of pipe beams 12 are connected.

[0037] As described above, the cable pipe row provided in this embodiment is applicable to the situation of cable overhead laying. Correspondingly, the cable pipe row is arranged overhead.

[0038] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prefabricated pipe row unit, characterized in that, It includes an upper row of pipe beams, a lower row of pipe beams and a vertical connection structure. The upper row of pipe beams and the lower row of pipe beams are opposite and parallel to each other up and down. The upper and lower ends of the vertical connection structure are respectively connected to the upper row of pipe beams and the lower row of pipe beams. At least a cable laying channel is provided in the upper row of pipe beams. Beam end connection parts for splicing with adjacent pipe row units are respectively provided at both ends of the upper row of pipe beams and both ends of the lower row of pipe beams.

2. The prefabricated pipe row unit according to claim 1, wherein The vertical connection structure includes a web plate, and the plate surface of the web plate is perpendicular to the beam width direction of the upper row of pipe beams.

3. The prefabricated pipe row unit according to claim 2, wherein, A plurality of hollow holes are provided on the web plate, and the hollow holes penetrate through both side plate surfaces of the web plate.

4. The prefabricated pipe row unit according to claim 2, characterized in that, The upper end of the web plate is an upwardly tapered structure, and / or the lower end of the web plate is a downwardly tapered structure.

5. The prefabricated pipe row unit according to claim 4, wherein When the upper end of the web plate is an upwardly tapered structure, auxiliary laying holes suitable for laying weak current lines and / or optical cables are provided at the upper end of the web plate; when the lower end of the web plate is a downwardly tapered structure, auxiliary laying holes suitable for laying weak current lines and / or optical cables are provided at the lower end of the web plate.

6. The prefabricated pipe row unit according to claim 1, characterized in that, The cable laying channel in the upper row of pipe beams includes a plurality of cable laying holes; and / or when a cable laying channel is provided in the lower row of pipe beams, it includes a plurality of cable laying holes.

7. The prefabricated pipe row unit according to claim 1, characterized in that, The beam end connection part is a flange connection part.

8. The prefabricated pipe row unit according to any one of claims 1 to 7, characterized in that, Prestressed steel bars are provided in the lower row of pipe beams.

9. A cable conduit, characterized in that, It includes a plurality of precast pipe row units as described in any one of claims 1 to 8. Each of the precast pipe row units is spliced in sequence. Among two adjacent precast pipe row units, the upper row of pipe beams of the two are spliced, and the lower row of pipe beams of the two are spliced.

10. The cable duct according to claim 9, characterized in that: The cable pipe is installed overhead.

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