Shield tunnel high voltage cable protection device and protection method

Abstract

The present invention provides a shield tunnel high-voltage cable protection device and protection method, comprising: a first clamping plate, the concave surface and convex surface of the first clamping plate are respectively fixed with a first arc-shaped clamping block coaxial with the first clamping plate and a connecting ear plate for fixing with the pipe segment connection bolt; a second clamping plate detachably connected to the first clamping plate and covered on the first clamping plate, the concave surface of the second clamping plate is fixed with a second arc-shaped clamping block, the first arc-shaped clamping block and the second arc-shaped clamping block define a channel for the cable to pass through, the inner wall of the end of the first clamping plate, the inner wall of the end of the second clamping plate, the end face of the end of the first arc-shaped clamping block, and the end face of the end of the second arc-shaped clamping block define concave sockets located at both ends of the channel respectively; a protective sleeve for passing the cable, the end of the protective sleeve is movably inserted in the concave socket. The device of the present invention can fix and protect high-voltage cables.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a shield tunnel high-voltage cable protection device and a protection method. Background Art

[0002] At present, the shield method is widely used in subway tunnel construction. In order to provide stable power for the shield machine excavation and the construction machinery of the auxiliary communication channel, high-voltage power supply is often used. The high-voltage cable is laid along the inner wall of the shield segment, and the high-voltage cable is suspended by the shield segment connection bolts. However, due to the small space of the shield tunnel, it is difficult to ensure the safe distance for laying high-voltage cables. In addition, during the construction process, materials are transported and personnel move frequently, which can easily cause cable damage. The safety risk is extremely high, so it is necessary to adopt certain protective measures for temporary high-voltage cables in the tunnel. At present, installing protective casings and cable ducts is the most commonly used high-voltage cable protection measure.

[0003] The use of conventional protective sleeves and cable ducts requires the installation of fixed supports on the shield segments, which makes the construction time-consuming and labor-intensive. In addition, conventional protective sleeves and cable ducts only serve as shielding and cannot fix the cable position, which can easily cause cable sliding and wear. Summary of the invention

[0004] In view of the above situation, the present invention provides a high-voltage cable protection device and a protection method suitable for installation and laying in a shield tunnel, which can both fix the high-voltage cable and protect the cable, thereby solving the defects of the existing cable laying protection device in the tunnel, which can only play a protective role but cannot fix the cable and easily cause sliding and wear of the cable.

[0005] To achieve the above object, the technical solution adopted by the present invention is: to provide a shield tunnel high voltage cable protection device, comprising:

[0006] A first clamping plate, wherein a first arc-shaped clamping block coaxial with the first clamping plate and a connecting ear plate for fixing with the pipe segment connecting bolts are respectively fixed on the concave surface and the convex surface of the first clamping plate;

[0007] A second clamping piece detachably connected to the first clamping piece, the second clamping piece is covered on the first clamping piece, a second arc-shaped clamping block docking with the first arc-shaped clamping block is fixed on the concave surface of the second clamping piece, the first arc-shaped clamping block and the second arc-shaped clamping block define a channel for the cable to pass through, and the inner wall of the end of the first clamping piece, the inner wall of the end of the second clamping piece, the end face of the end of the first arc-shaped clamping block, and the end face of the end of the second arc-shaped clamping block define concave sockets respectively located at both ends of the channel;

[0008] A protective sleeve for passing the cable, the end of the protective sleeve is movably inserted into the concave socket.

[0009] In the embodiment of the present invention, the connecting ear plate is parallel to the side edge of the first hoop piece.

[0010] In the embodiment of the present invention, the butt joint between the first clamping hoop piece and the second clamping hoop piece is fixed by bolts.

[0011] In the embodiment of the present invention, an insulating gasket fixed to the first arc-shaped clamping block and the second arc-shaped clamping block is provided in the channel.

[0012] The present invention further provides a shield tunnel high voltage cable protection method, comprising the following steps:

[0013] Providing the shield tunnel high voltage cable protection device;

[0014] A plurality of first hoop plates fixed with the pipe segment connection bolts are installed at intervals along the axial direction of the tunnel, wherein the inner arc surface of the first arc-shaped clamping block on the first hoop plate is arranged upward;

[0015] A plurality of the protective sleeves are sleeved on the outside of the cable at intervals, and the cable is mounted on the first clamping plates arranged at intervals along the axial direction of the tunnel, and the two ends of the protective sleeves are respectively clamped on the concave sockets on the adjacent first clamping plates;

[0016] After all protective sleeves are laid, clamp the cable into the first arc-shaped clamping block on the first clamping hoop piece;

[0017] The second clamping hoop piece cover is fixed on the first clamping hoop piece, and the upper part of the cable is clamped with the second arc-shaped clamping block.

[0018] The present invention adopts the above technical solution, so it has the following beneficial effects:

[0019] The shield tunnel high-voltage cable protection device of the present invention has a simple structure and is easy to install. It is adapted to the characteristics of laying high-voltage cables in shield tunnels. It can not only fix the high-voltage cables and prevent the cables from sliding and wearing, but also protect the cables. All components can be reused, which is green and environmentally friendly. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the shield tunnel high-voltage cable protection device of the present invention.

[0021] Figure 2 It is a partially enlarged schematic diagram of the shield tunnel high-voltage cable protection device of the present invention.

[0022] Figure 3 The present invention Figure 2 Schematic diagram of the main view.

[0023] Figure 4It is a schematic diagram of the use status of the shield tunnel high-voltage cable protection device of the present invention.

[0024] The corresponding relationship between the reference numerals and the components is as follows:

[0025] The first clamping hoop piece 1; the first arc-shaped clamping block 11; the connecting ear plate 12; the second clamping hoop piece 2; the second arc-shaped clamping block 21; the channel 3; the protective sleeve 4; and the bolt 5. DETAILED DESCRIPTION

[0026] To facilitate understanding of the present invention, the following description is provided in conjunction with the accompanying drawings and embodiments.

[0027] See also Figures 1 to 3 As shown, the present invention provides a shield tunnel high voltage cable protection device comprising:

[0028] A first clamping plate 1, wherein a first arc-shaped clamping block 11 coaxial with the first clamping plate 1 and a connecting ear plate 12 for fixing with a pipe segment connecting bolt (not shown) are respectively fixed on the concave surface and the convex surface of the first clamping plate 1;

[0029] A second clamping piece 2 detachably connected to the first clamping piece 1, the second clamping piece 2 is covered on the first clamping piece 1, a second arc-shaped clamping block 21 docking with the first arc-shaped clamping block 11 is fixed on the concave surface of the second clamping piece 2, the first arc-shaped clamping block 11 and the second arc-shaped clamping block 21 define a channel 3 for the cable to pass through, and the inner wall of the end of the first clamping piece 1, the inner wall of the end of the second clamping piece 2, the end face of the end of the first arc-shaped clamping block 11, and the end face of the end of the second arc-shaped clamping block 21 define concave sockets respectively located at both ends of the channel 3;

[0030] A protective sleeve 4 for passing the cable, the end of the protective sleeve 4 is movably inserted into the recessed socket. Specifically, the outer wall diameter of the protective sleeve 4 is smaller than the diameter of the cylindrical space formed by the first clamping piece and the second clamping piece, ensuring that the protective sleeve 4 has space for a certain swing angle to adapt to the angle change of the shield tunnel.

[0031] In the embodiment of the present invention, the connecting ear plate is parallel to the side edge of the first clamping piece, so that the first clamping piece 1 can maintain a horizontal state when being fixed with the pipe segment connecting bolts.

[0032] In the embodiment of the present invention, the butt joint between the first clamping plate 1 and the second clamping plate 2 is fixed by bolts 5 .

[0033] In an embodiment of the present invention, an insulating gasket (not shown) fixed to the first arc-shaped clamp block 11 and the second arc-shaped clamp block 21 is provided in the channel 3. The insulating gasket should have a certain thickness and elasticity to reduce the squeezing damage of the first arc-shaped clamp block 11 and the second arc-shaped clamp block on the cable.

[0034] In the embodiment of the present invention, the first clamping plate 1, the second clamping plate 2 and the connecting ear plate 12 are made of aluminum alloy material, the first clamping plate 1 and the connecting ear plate 12 are fixed by welding, and the protective sleeve 4 is a long PVC tube.

[0035] In the embodiment of the present invention, the ear holes on the connecting ear plates 12 match the size of the shield segment connecting bolts, and the length of the protective sleeve 4 should be determined according to the relative positions of the segment connecting bolts.

[0036] In the embodiment of the present invention, the length of the inner recessed socket should be moderate to ensure that the end of the protective sleeve 4 can be stably inserted into the inner recessed socket.

[0037] The present invention further provides a shield tunnel high voltage cable protection method, comprising the following steps:

[0038] Providing the shield tunnel high voltage cable protection device;

[0039] A plurality of first clamping plates 1 fixed with the pipe segment connection bolts are installed at intervals along the axial direction of the tunnel, and the inner arc surface of the first arc-shaped clamping block 11 on the first clamping plate 1 is arranged upward; Figure 4 As shown, the spacing between adjacent first hoop segments 1 is equal to the width of two ring segments 6;

[0040] A plurality of the protective sleeves 4 are sleeved on the outside of the cable at intervals, and the cable is mounted on the first clamping plates 1 arranged at intervals along the axial direction of the tunnel, and the two ends of the protective sleeves 4 are respectively clamped on the concave sockets on the adjacent first clamping plates 1;

[0041] After all the protective sleeves 4 are laid, the cables are clamped into the first arc-shaped clamping block 11 on the first clamping hoop piece 1;

[0042] The second clamping plate 2 is covered and fixed on the first clamping plate 1, and the upper part of the cable is clamped with the second arc-shaped clamping block 21. Finally, the first clamping plate 1 and the second clamping plate 2 are connected and fastened with bolts 5.

[0043] The present invention is described in detail above in conjunction with the accompanying drawings and embodiments. A person skilled in the art can make various variations of the present invention according to the above description. Therefore, certain details in the embodiments should not constitute a limitation of the present invention, and the scope of protection of the present invention shall be defined by the scope of the attached claims.

Claims

1. A shield tunnel high voltage cable protection device, characterized in that: include: A first clamping plate, wherein a first arc-shaped clamping block coaxial with the first clamping plate and a connecting ear plate for fixing with the pipe segment connecting bolts are respectively fixed on the concave surface and the convex surface of the first clamping plate; A second clamping piece detachably connected to the first clamping piece, the second clamping piece is covered on the first clamping piece, a second arc-shaped clamping block docking with the first arc-shaped clamping block is fixed on the concave surface of the second clamping piece, the first arc-shaped clamping block and the second arc-shaped clamping block define a channel for the cable to pass through, and the inner wall of the end of the first clamping piece, the inner wall of the end of the second clamping piece, the end face of the end of the first arc-shaped clamping block, and the end face of the end of the second arc-shaped clamping block define concave sockets respectively located at both ends of the channel; A protective sleeve for passing the cable, the end of the protective sleeve being movably inserted into the concave socket; The connecting ear plate is parallel to the side edge of the first hoop plate; The butt joint between the first clamping hoop piece and the second clamping hoop piece is fixed by bolts.

2. The shield tunnel high voltage cable protection device according to claim 1 is characterized in that: An insulating gasket fixed to the first arc-shaped clamping block and the second arc-shaped clamping block is arranged in the channel.

3. A shield tunnel high voltage cable protection method, characterized in that: The following steps are involved: Provide a shield tunnel high voltage cable protection device as described in any one of claims 1 to 2; A plurality of first hoop plates fixed with the pipe segment connection bolts are installed at intervals along the axial direction of the tunnel, wherein the inner arc surface of the first arc-shaped clamping block on the first hoop plate is arranged upward; A plurality of the protective sleeves are sleeved on the outside of the cable at intervals, and the cable is mounted on the first clamping plates arranged at intervals along the axial direction of the tunnel, and the two ends of the protective sleeves are respectively clamped on the concave sockets on the adjacent first clamping plates; After all protective sleeves are laid, clamp the cable into the first arc-shaped clamping block on the first clamping hoop piece; The second clamping hoop piece cover is fixed on the first clamping hoop piece, and the upper part of the cable is clamped with the second arc-shaped clamping block.

Images