Embedded-part-free shield section pipe jacking section power transmission and transformation cable tunnel cable support

Abstract

The utility model relates to an embedded-part-free shield section pipe jacking section power transmission and transformation cable tunnel cable support which comprises a left vertical arc-shaped stand column and a right vertical arc-shaped stand column which are tightly attached to the inner wall of a tunnel, the bottom end of the left vertical arc-shaped stand column and the bottom end of the right vertical arc-shaped stand column are connected through a bottom arc-shaped supporting rod, and the top end of the left vertical arc-shaped stand column and the top end of the right vertical arc-shaped stand column are connected through an adjustable supporting rod. The left vertical arc-shaped stand column, the right vertical arc-shaped stand column, the bottom arc-shaped supporting rod and the adjustable supporting rod form an arc cable support matched with the inner wall of a tunnel. The bottom arc-shaped supporting rods are connected to the bottoms of the two vertical arc-shaped stand columns, and the bottom of the cable support is fixed in a cast-in-place concrete mode; meanwhile, the adjustable supporting rod is matched, pressure is applied to the two vertical arc-shaped stand columns, the two vertical arc-shaped stand columns are tightly attached to the inner wall of the tunnel, and therefore under the condition that an original cable tunnel main body structure is not damaged or no embedded connecting piece exists, installation and fixing of the cable support are completed, construction is easy and flexible, and practicability is high.

Description

Technical Field

[0001] The utility model relates to the technical field of transmission lines, and particularly relates to a cable bracket for a shield section and a pipe jacking section of a power transmission and transformation cable tunnel without embedded parts. Background Art

[0002] With the rapid development of China's social economy, the urban appearance needs to be continuously improved to enhance the urban image. The original urban overhead lines are gradually converted into underground cable tunnels to ensure the safety and stability of the power system and improve the safety and power supply reliability of China's power grid. The installation of cable brackets in the cable tunnel is a necessary condition for cable laying. In the past, steel plates or steel rings were pre-embedded in the main structure of the cable tunnel in the shield section and pipe jacking section to provide conditions for the welding of cable brackets. The welding workload is large and the contact with the embedded parts is uneven, resulting in poor visual effects. After the embedded parts are fixed, the distance between the brackets cannot be adjusted.

[0003] In addition, in many current projects, due to urban planning, the cable tunnel was constructed first without setting embedded parts. Steel plates are installed by implanting steel bars, expansion bolts or chemical bolts into the main structure of the cable tunnel to provide conditions for the welding of cable brackets. This brings great uncertainties to the safety and waterproofing of the main structure and poses difficulties for the installation of cable brackets.

[0004] Therefore, this application proposes a cable bracket for a shield section and a pipe jacking section of a power transmission and transformation cable tunnel without embedded parts to solve the above problems. Content of the Utility Model

[0005] The utility model provides a cable bracket for a shield section and a pipe jacking section of a power transmission and transformation cable tunnel without embedded parts, aiming to provide a cable tunnel bracket with simple construction and flexible installation.

[0006] The specific technical solution of the utility model is: a cable bracket for a shield section and a pipe jacking section of a power transmission and transformation cable tunnel without embedded parts, including a left vertical arc column and a right vertical arc column that are closely attached to the inner wall of the tunnel. The bottom ends of the left vertical arc column and the right vertical arc column are connected by a bottom arc brace, and the top ends are connected by an adjustable brace; the left vertical arc column, the right vertical arc column, the bottom arc brace and the adjustable brace form an arc cable bracket that matches the inner wall of the tunnel.

[0007] Further, preferably, the adjustable brace includes a screw rod, a nut and a sleeve that match it. The screw rod is connected to the top end of the left vertical arc column through a left connecting plate, and the sleeve is connected to the top end of the right vertical arc column through a right connecting plate; the inner wall of the sleeve is provided with an internal thread that matches the screw rod, and the screw rod is threadedly connected to the sleeve; a nut is also threadedly connected to the outer surface of the screw rod.

[0008] Further, preferably, a gasket is also provided between the nut and the sleeve.

[0009] Furthermore, preferably, a number of symmetrically distributed rubber gaskets are provided between the left vertical arc-shaped column and the right vertical arc-shaped column and the inner wall of the tunnel.

[0010] Furthermore, preferably, a number of symmetrically distributed horizontal cable brackets are provided along the radial direction of the tunnel on the left vertical arc-shaped column and the right vertical arc-shaped column.

[0011] Furthermore, preferably, reinforcing plates for increasing the supporting weight are provided on both sides of the left vertical arc-shaped column and the right vertical arc-shaped column where the horizontal cable brackets are provided.

[0012] Furthermore, preferably, the horizontal cable bracket, the two reinforcing plates, the left vertical arc-shaped column or the right vertical arc-shaped column are connected by bolts.

[0013] Furthermore, preferably, the horizontal cable bracket is an angle steel.

[0014] Furthermore, preferably, a number of symmetrically distributed longitudinal support rods are provided along the two sides in the longitudinal direction of the tunnel on the left vertical arc-shaped column and the right vertical arc-shaped column.

[0015] The beneficial effects of the present utility model are as follows: The cable bracket provided by the present utility model realizes the bottom fixation of the cable bracket by connecting the bottom arc-shaped support rod at the bottom of the two vertical arc-shaped columns and combining the method of cast-in-place concrete. At the same time, in cooperation with the adjustable strut, pressure is applied to the two vertical arc-shaped columns to make them closely fit with the inner wall of the tunnel. In this way, the installation and fixation of the cable bracket are completed without damaging the original main structure of the cable tunnel or without pre-buried connecting parts, and the construction is simple, flexible, and highly practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is the front view of the present utility model;

[0017] Figure 2 is Figure 1 the front view of the adjustable strut in

[0018] Figure 3 is Figure 1 the connection structure diagram of the horizontal cable bracket in

[0019] Figure 4 is Figure 3 the A-A sectional view of

[0020] Figure 5 is Figure 3 the B-B sectional view of

[0021] In the figure: 11 - left vertical arc-shaped column, 12 - right vertical arc-shaped column; 2 - horizontal cable bracket; 3 - longitudinal support rod; 4 - adjustable support rod, 41 - screw rod, 42 - nut, 43 - sleeve, 44 - left connecting plate, 45 - right connecting plate; 5 - bottom arc-shaped support rod; 6 - reinforcing plate; 7 - bolt; 8 - rubber gasket; 9 - drainage ditch; 10 - concrete. Detailed implementation mode

[0022] In order to make the technical problems and technical solutions solved by the present utility model clearer, the following further details the present utility model in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0023] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation to the present utility model.

[0024] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected" should be understood in a broad sense. 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0025] As Figure 1 shown, a cable bracket for a shield section and a pipe jacking section of a transmission and transformation cable tunnel without embedded parts includes a left vertical arc-shaped column 11 and a right vertical arc-shaped column 12 that are closely attached to the inner wall of the tunnel. The bottom ends of the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 are connected by a bottom arc-shaped support rod 5, and the top ends are connected by an adjustable support rod 4; the left vertical arc-shaped column 11, the right vertical arc-shaped column 12, the bottom arc-shaped support rod 5, and the adjustable support rod 4 form an arc cable bracket that matches the inner wall of the tunnel.

[0026] During use, the bottom fixation of the cable bracket can be completed in two ways, specifically as follows:

[0027] Method 1: Connect after pouring

[0028] Embed the bottom arc strut 5 in the cast-in-place concrete, leaving both ends of the bottom arc strut 5 exposed for connection to the left vertical arc column 11 and the right vertical arc column 12, so that the bottom restraint condition of the cable support is close to a fixed restraint.

[0029] Method 2: Connect first and then pour

[0030] After connecting the bottom of the left vertical arc column 11 and the right vertical arc column 12 to the bottom arc strut 5, pour concrete until the connection part is covered by the concrete, and then stop pouring to firmly fix the bottom of the cable support.

[0031] For the above two methods, the bottom of the cable support can be fixed without damaging the main structure of the original cable tunnel or without pre-embedded connectors. Moreover, the installation position of the cable support can be flexibly set according to the actual requirements of cable laying and firewall setting (the longitudinal spacing between adjacent cable supports along the tunnel depth direction is adjustable), avoiding repeated construction caused by unreasonable pre-setting of pre-embedded connectors and a large amount of work for welding with the embedded parts. In addition, for the above two fixing methods, a drainage ditch 9 can be reserved during concrete pouring to ensure drainage inside the cable tunnel and prevent water accumulation.

[0032] In addition, when comparing the above two fixing methods, each has its own advantages: Method 1 has a smaller concrete pouring surface, which can ensure higher adjustability of the left vertical arc column 11 and the right vertical arc column 12; Method 2 has a larger concrete pouring surface, which can make the bottom of the cable support more firmly fixed.

[0033] The structure of the adjustable strut 4 is as Figure 2 shown, including a screw rod 41 and a nut 42 and a sleeve 43 that match it. The screw rod 41 is connected to the top of the left vertical arc column 11 through a left connecting plate 44, and the sleeve 43 is connected to the top of the right vertical arc column 12 through a right connecting plate 45; the inner wall of the sleeve 43 is provided with an internal thread that matches the screw rod 41, and the screw rod 41 is threadedly connected to the sleeve 43. The sleeve 43 can provide a certain amount of stroke for the screw rod 41 to rotate in and out; a nut 42 is also threadedly connected to the outer surface of the screw rod 41. Rotating the nut 42 can make the screw rod 41 perform a horizontal movement of rotating in and out relative to the sleeve 43. To ensure the stability of the nut 42, a gasket 46 is also provided between the nut 42 and the sleeve 43.

[0034] After the cable bracket is fixed at the bottom, rotate the nut 42 to gradually fit the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 to the inner wall of the tunnel. Relying on the acting force generated by the screw 41 and the sleeve 43 on the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12, the overall fixation of the cable bracket is achieved. Moreover, through the cooperation of the screw 41 and the sleeve 43, the distance between the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 can also be finely adjusted, and the diameter of the cable bracket can be changed within a small range to be applicable to tunnels with different diameters.

[0035] Preferably, as Figure 1 shown, a number of symmetrically distributed rubber gaskets 8 are provided between the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 and the inner wall of the tunnel, which can increase the friction between the vertical arc-shaped column and the inner wall of the tunnel and make the vertical arc-shaped column more stable.

[0036] Preferably, the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 are provided with a number of symmetrically distributed horizontal cable brackets 2 extending along the radial direction of the tunnel, and a number of symmetrically distributed longitudinal support rods 3 extending along both sides in the longitudinal direction of the tunnel. Among them, the horizontal cable bracket 2 is an angle steel for horizontally placing cables; the longitudinal support rod 3 can resist the dynamic load of the power cable along the length direction of the cable to ensure the out-of-plane stability of the vertical arc-shaped column.

[0037] Preferably, as Figures 3 to 5 shown, both sides of the left vertical arc-shaped column 11 and the right vertical arc-shaped column 12 where the horizontal cable bracket 2 is provided are provided with reinforcing plates 6 for increasing the supporting weight to enhance the supporting force of the horizontal cable bracket 2. Moreover, the horizontal cable bracket 2, the two reinforcing plates 6, the left vertical arc-shaped column 11 or the right vertical arc-shaped column 12 are connected by bolts 7, so that the disassembly and assembly of the horizontal cable bracket 2 are convenient, and the number and position of the horizontal cable bracket 2 can be flexibly set according to the use needs.

[0038] The present invention has been described in detail through specific and preferred embodiments, but those skilled in the art should understand that the present invention is not limited to the above-described embodiments. Any modifications, equivalent replacements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A cable support for a power transmission and transformation cable tunnel in a shield section and a jacking pipe section without embedded parts, characterized in that: It includes a left vertical arc-shaped column (11) and a right vertical arc-shaped column (12) that closely fit the inner wall of the tunnel. The bottoms of the left vertical arc-shaped column (11) and the right vertical arc-shaped column (12) are connected by a bottom arc-shaped brace (5), and the tops are connected by an adjustable brace (4). The left vertical arc-shaped column (11), the right vertical arc-shaped column (12), the bottom arc-shaped brace (5), and the adjustable brace (4) form an arc-shaped cable bracket that matches the inner wall of the tunnel.

2. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 1, wherein: The adjustable brace (4) includes a screw rod (41), a nut (42) and a sleeve (43) that match it. The screw rod (41) is connected to the top of the left vertical arc-shaped column (11) through a left connecting plate (44), and the sleeve (43) is connected to the top of the right vertical arc-shaped column (12) through a right connecting plate (45). The inner wall of the sleeve (43) is provided with an internal thread that matches the screw rod (41), and the screw rod (41) is threadedly connected to the sleeve (43). A nut (42) is also threadedly connected to the outer surface of the screw rod (41).

3. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 2, wherein: A gasket (46) is also provided between the nut (42) and the sleeve (43).

4. The cable support for the power transmission and transformation cable tunnel in the shield section and the jacking pipe section without embedded parts according to claim 2, characterized in that: A number of symmetrically distributed rubber gaskets (8) are provided between the left vertical arc-shaped column (11) and the right vertical arc-shaped column (12) and the inner wall of the tunnel.

5. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 2, characterized in that: The left vertical arc-shaped column (11) and the right vertical arc-shaped column (12) are provided with a number of symmetrically distributed horizontal cable brackets (2) extending along the radial direction of the tunnel.

6. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 5, characterized in that: Reinforcing plates (6) for increasing the supporting weight are provided on both sides of the left vertical arc-shaped column (11) and the right vertical arc-shaped column (12) where the horizontal cable brackets (2) are provided.

7. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 6, characterized in that: The horizontal cable bracket (2), the two reinforcing plates (6), the left vertical arc-shaped column (11) or the right vertical arc-shaped column (12) are connected by bolts (7).

8. A cable support for a shield section and a jacking pipe section of a power transmission and transformation cable tunnel without embedded parts according to any one of claims 5-7, characterized in that: The horizontal cable bracket (2) is an angle steel.

9. The cable support for the power transmission and transformation cable tunnel of the shield section and the jacking pipe section without embedded parts according to claim 2, wherein: The left vertical arc-shaped column (11) and the right vertical arc-shaped column (12) are provided with a number of symmetrically distributed longitudinal support rods (3) extending along both sides in the depth direction of the tunnel.

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