A fireproof and explosion-proof cable

Abstract

The present invention discloses a fireproof and explosion-proof cable, which comprises a cable body, a first fireproof layer, a second fireproof layer, a steel pipe, a waterproof cover and an explosion-proof pipe; both ends of the waterproof cover are respectively connected to one end of the steel pipe and one end of the explosion-proof pipe, and the other end of the explosion-proof pipe is connected to a bridge; the cable body sequentially passes through the explosion-proof pipe, the waterproof cover and extends into the steel pipe; the first fireproof layer above the waterproof cover is arranged between the cable body and the steel pipe; the second fireproof layer at and below the waterproof cover is arranged on the surface of the cable body. The fireproof and explosion-proof cable disclosed by the present invention provides the cable with fireproof and explosion-proof functions simultaneously without changing the original functions of the cable, and the protective layer is separated from the cable, and at the same time, the fireproof layer and the explosion-proof layer are also separated from each other, which is convenient for replacement and maintenance; it can be used for the cable construction of new bridges or old bridges, and can also be used for the cables of long-span cable-stayed bridges.

Description

Technical Field

[0001] The present invention relates to a cable, and more particularly to a fireproof and explosion-proof cable. Background Art

[0002] Currently, most bridge accidents occur due to cable damage caused by fire or explosion, and there are no corresponding technical means for the cable to protect against both fire and explosion.

[0003] The existing cable protection is dedicated to aspects such as corrosion and vibration, or the cable only has one of the fireproof or explosion-proof functions. For example, Chinese Patent CN207259963U discloses a fireproof cable, which includes a cable, an inner lining tube, a fireproof layer, and an outer lining tube, and a fireproof layer is provided between the inner lining tube and the outer lining tube; the fireproof layer is one of filled fireproof materials, fireproof fillers wrapped, or fireproof coatings, and this cable only has a fireproof function. Chinese Patent CN208395669U discloses a new type of explosion-resistant impact cable, which includes a cable and a support tube nested with the cable, and explosion-proof protective layers are provided on the inner and outer walls of the support tube, and an outer protection tube can also be nested outside the support tube, and the cable only has an explosion-proof function. Therefore, the cables in the prior art only have one of the fireproof or explosion-proof functions, and the above fireproof or explosion-proof structures can only be used for new bridge cables and cannot directly add fireproof or explosion-proof functions to the conventional cables of old bridges. Summary of the Invention

[0004] In view of the above problems, the present invention provides a fireproof and explosion-proof cable, aiming to solve the problems that the existing cables only have one of the fireproof or explosion-proof functions and cannot directly add fireproof or explosion-proof functions to the conventional cables of old bridges.

[0005] The present invention adopts the following technical solutions to achieve the above object:

[0006] A fireproof and explosion-proof cable, comprising a cable body, a first fireproof layer, a second fireproof layer, a steel pipe, a waterproof cover, and an explosion-proof pipe; both ends of the waterproof cover are respectively connected to one end of the steel pipe and the explosion-proof pipe, and the other end of the explosion-proof pipe is connected to the bridge; the cable body sequentially passes through the explosion-proof pipe, the waterproof cover and extends into the steel pipe; the first fireproof layer above the waterproof cover is arranged between the cable body and the steel pipe; the second fireproof layer located at and below the waterproof cover is arranged on the surface of the cable body. The fireproof and explosion-proof structure of this technical solution can provide the cable with both fireproof and explosion-proof functions on the basis of not changing the original functions of the cable, and the protective layer is separated from the cable, and at the same time, the fireproof layer is also separated from the explosion-proof pipe, which is convenient for replacement and maintenance; it can be used for the improvement of the cables of old bridges, adding a second fireproof layer and an explosion-proof pipe between the original waterproof cover and the bridge, and adding a first fireproof layer between the cable body and the steel pipe, and the force of the cable body is not affected during the construction process, and it can be used for the transformation of old bridges; among them, the materials used for the first fireproof layer and the second fireproof layer have the properties of fire resistance and heat insulation; the materials used for the explosion-proof pipe have the properties of high strength or energy absorption by buffering, and can resist impact, explosion and other damages.

[0007] A further technical solution thereof is that the first fireproof layer is located on the surface of the cable body.

[0008] A further technical solution thereof is that the cable further includes an HDPE sheath, the HDPE sheath is located between the steel pipe and the cable body and is connected to the waterproof cover; the first fireproof layer is located on the surface of the HDPE sheath.

[0009] A further technical solution thereof is that the cable further includes a shock absorber, the shock absorber is located inside the waterproof cover, is connected to the explosion-proof pipe, and is sleeved outside the second fireproof layer. The fireproof and explosion-proof cable in this solution can be used for the cables of long-span cable-stayed bridges with shock-absorbing devices.

[0010] A further technical solution thereof is that the shock absorber is connected to the explosion-proof pipe through a support and bolts, and both ends of the support are respectively connected to the shock absorber and the explosion-proof pipe through bolts.

[0011] A further technical solution thereof is that the bridge includes a pre-embedded pipe, and the explosion-proof pipe is connected to the bridge through the pre-embedded pipe; the pre-embedded pipe is buried inside the bridge and fixedly connected to the bridge, and the explosion-proof pipe is connected to the pre-embedded pipe.

[0012] A further technical solution thereof is that the bridge includes a pre-embedded pipe and a concrete block for fixing the pre-embedded pipe, and the explosion-proof pipe is connected to the bridge through the concrete block; the concrete block is fixedly connected to the bridge, and the explosion-proof pipe is connected to the concrete block.

[0013] A further technical solution thereof is that the explosion-proof pipe is connected to the bridge by one of welding, riveting, threaded connection, and nesting.

[0014] A further technical solution thereof is that the steel pipe is connected to the waterproof cover by one of welding, riveting, threaded connection, and nesting.

[0015] A further technical solution is that the cable body is one of a steel strand cable body or a steel wire cable body.

[0016] The beneficial effects of the present invention are as follows:

[0017] A fireproof and explosion-proof cable provided by the present invention provides the cable with fireproof and explosion-proof functions without changing the original functions of the cable, and the protective layer is separated from the cable. At the same time, the first fireproof layer, the second fireproof layer and the explosion-proof pipe are also separated from each other, which is convenient for replacement and maintenance; it can be used for the construction of cables of new bridges or old bridges, and can also be used for cables of long-span cable-stayed bridges. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is: a schematic structural diagram of a fireproof and explosion-proof cable with the first fireproof layer located on the surface of the cable body of the present invention.

[0019] Figure 2 It is: a schematic structural diagram of a fireproof and explosion-proof cable with the explosion-proof pipe connected to the embedded pipe of the present invention.

[0020] Figure 3 It is: a schematic structural diagram of a fireproof and explosion-proof cable with the first fireproof layer located on the surface of the sheath of the present invention.

[0021] Figure 4 It is: a schematic structural diagram of a fireproof and explosion-proof cable with the first fireproof layer located on the surface of the cable body and provided with a shock absorber of the present invention.

[0022] Figure 5 It is: a schematic structural diagram of a fireproof and explosion-proof cable with the first fireproof layer located on the surface of the sheath and provided with a shock absorber of the present invention.

[0023] In the figure:

[0024] 1. Cable body; 2. HDPE sheath; 31. First fireproof layer; 32. Second fireproof layer; 4. Steel pipe; 5. Waterproof cover; 51. Ear plate; 52. Support; 6. Shock absorber; 7. Explosion-proof pipe; 8. Embedded pipe; 9. Concrete block; 10. Bridge. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The following will combine the attached Figures 1 to 5 drawings and specific embodiments to describe the present invention in detail. Without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0026] Such as Figure 1As shown in the figure, this embodiment provides a fireproof and explosion-proof cable, which includes a cable body 1 made of steel strands, a first fireproof layer 31, a second fireproof layer 32, a steel pipe 4, a waterproof cover 5, and an explosion-proof pipe 7; the bridge 10 is provided with a pre-embedded pipe 8 and a concrete block 9 for fixing the pre-embedded pipe 8; the upper end of the waterproof cover 5 is connected to the steel pipe 4 in a nested manner, and the lower end is connected to one end of the explosion-proof pipe 7 by welding; the other end of the explosion-proof pipe 7 is connected to the concrete block 9 by bolts; one end of the cable body 1 is anchored in the anchor of one end of the bridge 10, and the other end is anchored on the bridge tower of the cable-stayed bridge; the cable body 1 passes through the bridge 10 and sequentially passes through the explosion-proof pipe 7, the waterproof cover 5 and extends into the steel pipe 4; the first fireproof layer 31 is located above the waterproof cover 5, and the second fireproof layer 32 is located below the waterproof cover 5 and its lower part, wherein the first fireproof layer 31 and the second fireproof layer 32 are both provided on the surface of the cable body 1. The specific height of the steel pipe 4 can be set according to the needs of the bridge and is not limited here. The fireproof and explosion-proof structure in this embodiment can provide the cable with fireproof and explosion-proof functions at the same time without changing the original functions of the cable, and the protective layers (the first fireproof layer, the second fireproof layer and the explosion-proof pipe) are separated from the cable. At the same time, the first fireproof layer 31, the second fireproof layer 32 and the explosion-proof pipe 7 are also separated from each other, which is convenient for replacement and maintenance and can be used for the improvement of the cables of old bridges.

[0027] In the above embodiment, the connection relationship between the waterproof cover 5 and the steel pipe 4 is exemplarily shown. According to other embodiments or actual applications, the above connection relationship can also be replaced by welding, riveting, threaded connection and other methods. In the above embodiment, the connection relationship between the waterproof cover 5 and the explosion-proof pipe 7 is exemplarily shown. According to other embodiments or actual applications, the above connection relationship can also be replaced by riveting, threaded connection, nesting and other methods. In the above embodiment, it is exemplarily shown that the cable body 1 is made of steel strands. According to other embodiments or actual applications, the fireproof and explosion-proof structure of the above embodiment can also be used for the cable body 1 made of steel wires.

[0028] In the above embodiment, the explosion-proof pipe 7 and the bridge 10 are connected through the concrete block 9. According to other embodiments or actual applications, as Figure 2 shown, the explosion-proof pipe 7 can also be connected to the bridge 10 through the pre-embedded pipe 8, and the connection methods include but are not limited to welding, riveting, threaded connection, nesting and other connection methods; the above embodiment describes that the explosion-proof pipe 7 and the bridge 10 are indirectly connected. According to other embodiments or actual applications, the explosion-proof pipe 7 can also be directly connected to the bridge 10, and the connection methods include but are not limited to welding, riveting, threaded connection, nesting and other connection methods.

[0029] Another embodiment, as Figure 3As shown in the figure, on the basis of the above-described embodiment, the cable further includes an HDPE sheath 2 (a sheath made of high-density polyethylene material), the HDPE sheath 2 is located between the steel pipe 4 and the cable body 1, and is connected to the waterproof cover 5; the first fireproof layer 31 is located on the surface of the HDPE sheath 2.

[0030] Another embodiment is as Figure 4 , Figure 5 shown. On the basis of the above-described embodiment, the cable further includes a shock absorber 6 and a support 52. The shock absorber 6 is located inside the waterproof cover 5 and is sleeved outside the second fireproof layer 32. Both ends of the support 52 are connected to the shock absorber 6 and the explosion-proof pipe 7 by bolts respectively. The fireproof and explosion-proof cable in this solution can be used for the cables of long-span cable-stayed bridges with shock absorbers 6.

[0031] The above-described embodiment exemplarily shows the connection manner between the shock absorber 6 and the explosion-proof pipe 7. According to other embodiments or actual applications, the explosion-proof pipe 7 can also be directly connected to the shock absorber 6 by welding, riveting, screw connection, nesting, etc.

[0032] A fireproof and explosion-proof cable provided by the present invention provides a fireproof and explosion-proof function for the cable without changing the original function of the cable, and the protective layer is separated from the cable. At the same time, the first fireproof layer 31, the second fireproof layer 32 and the explosion-proof pipe 7 are also separated from each other, which is convenient for replacement and maintenance; it can be used for the cable construction of new bridges or old bridges, and can also be used for the cables of long-span cable-stayed bridges.

Claims

1. A fireproof and explosion-proof cable, characterized in that, the cable includes a cable body (1), a first fireproof layer (31), a second fireproof layer (32), a steel pipe (4), a waterproof cover (5), and an explosion-proof pipe (7); both ends of the waterproof cover (5) are respectively connected to one end of the steel pipe (4) and the explosion-proof pipe (7), and the other end of the explosion-proof pipe (7) is connected to the bridge (10); the cable body (1) sequentially passes through the explosion-proof pipe (7), the waterproof cover (5) and extends into the steel pipe (4); the first fireproof layer (31) above the waterproof cover (5) is arranged between the cable body (1) and the steel pipe (4); the second fireproof layer (32) at and below the waterproof cover (5) is arranged on the surface of the cable body (1); the cable further includes a shock absorber (6), the shock absorber (6) is located inside the waterproof cover (5), connected to the explosion-proof pipe (7), and sleeved outside the second fireproof layer (32).

2. A fireproof and explosion-proof cable according to claim 1, characterized in that, the first fireproof layer (31) is located on the surface of the cable body (1).

3. A fireproof and explosion-proof cable according to claim 1, characterized in that, the cable further includes an HDPE sheath (2), the HDPE sheath (2) is located between the steel pipe (4) and the cable body (1), and connected to the waterproof cover (5); the first fireproof layer (31) is located on the surface of the HDPE sheath (2).

4. A fireproof and explosion-proof cable according to claim 1, characterized in that, the shock absorber (6) is connected to the explosion-proof pipe (7) through a support and bolts, and both ends of the support are respectively connected to the shock absorber (6) and the explosion-proof pipe (7) through bolts.

5. A fireproof and explosion-proof cable according to claim 1, characterized in that, the bridge (10) includes a pre-embedded pipe (8), and the explosion-proof pipe (7) is connected to the bridge (10) through the pre-embedded pipe (8).

6. A fireproof and explosion-proof cable according to claim 1, characterized in that, the bridge (10) includes a pre-embedded pipe (8) and a concrete block (9) for fixing the pre-embedded pipe (8), and the explosion-proof pipe (7) is connected to the bridge (10) through the concrete block (9).

7. A fireproof and explosion-proof cable according to claim 1, characterized in that, the explosion-proof pipe (7) is connected to the bridge (10) by one of welding, riveting, threaded connection, and nesting.

8. A fireproof and explosion-proof cable according to claim 1, characterized in that, the steel pipe (4) is connected to the waterproof cover (5) by one of welding, riveting, threaded connection, and nesting.

9. A fireproof and explosion-proof cable according to claim 1, characterized in that, the cable body (1) is one of a steel stranded wire cable body or a steel wire cable body.

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