A tunnel signal cable fixing device

Abstract

The utility model discloses a tunnel signal cable fixing device, the utility model relates to cable fixing technical field. This tunnel signal cable fixing device, including base, the opening of base is provided with anti -drop cover, and the through -hole of anti -drop cover inside is equipped with connecting rod, and the through -hole of base top and bottom is provided with chemical anchor bolt, and the outer surface of chemical anchor bolt is connected with the outer hexagon nut with screw thread, and the outer surface of outer hexagon nut is provided with fire baffle, and the inner chamber of base is provided with cable clamping mechanism, and cable clamping mechanism includes first fixed plate, and the lower surface fixed connection of first fixed plate has screw rod, and the outer surface of screw rod is equipped with first pressure plate, second pressure plate, third pressure plate and fourth pressure plate, the utility model strengthens the fire -resistant performance and stability of fixing device, still can clamp the cable of different diameter, keeps cable long -term stable, prevents cable and base between mutual friction and is damaged when preventing cable from receiving external force and shaking.

Description

Technical Field

[0001] This utility model relates to the field of cable fixing technology, specifically a tunnel signal cable fixing device. Background Technology

[0002] In tunnel engineering, the securing of signal cables plays a crucial role in ensuring the stability and safety of signal transmission. As a key passage connecting different regions, the smoothness of signal transmission within a tunnel directly affects the normal operation of functions such as traffic safety, emergency communication, and daily monitoring. Therefore, the securing of signal cables is particularly important. A robust signal cable securing device can effectively prevent cables from swaying or shifting due to external factors such as vehicle traffic and wind, thereby avoiding signal interruptions caused by loose or broken cables. This not only helps maintain smooth traffic flow within the tunnel but also enables rapid information transmission in emergencies, buying valuable time for rescue operations. In modern tunnel engineering construction, the signal cable securing system, as a core infrastructure ensuring the safety of rail transit communication, is increasingly important. Signal cables undertake key functions such as train operation control, dispatching and command, and emergency communication; their securing quality directly affects the operational reliability and safety of the entire rail transit system.

[0003] Traditional cable fixing methods generally use simple clips or straps, which often result in insecure fixing and easy loosening or damage of cables due to external forces. This not only affects the normal operation of the tunnel but also increases maintenance costs and difficulties. In addition, traditional fixing devices are also insufficient in terms of fire resistance. In the event of a fire, the cables are prone to falling off, thereby increasing the risk of the fire spreading. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a tunnel signal cable fixing device to solve the problems of insecure fixing, susceptibility to external forces leading to cable loosening and damage, and insufficient fire resistance of traditional fixing methods mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a tunnel signal cable fixing device, comprising a base, an anti-detachment cover at the opening of the base, a connecting rod sleeved in the through hole inside the anti-detachment cover, chemical anchors in the through holes at the top and bottom of the base, an external hexagonal nut threaded onto the outer surface of the chemical anchor, a fireproof baffle on the outer surface of the external hexagonal nut, and a cable clamping mechanism in the inner cavity of the base, the cable clamping mechanism comprising a first fixing plate, a threaded rod fixedly connected to the lower surface of the first fixing plate, and a first pressure plate, a second pressure plate, a third pressure plate, and a fourth pressure plate sleeved on the outer surface of the threaded rod.

[0006] Preferably, the bottom end of the threaded rod is fixedly connected to a second fixing plate, and the outer surfaces of the first fixing plate and the second fixing plate are both fixedly connected to the outer surface of the base. The first fixing plate, the threaded rod and the second fixing plate are symmetrically arranged on both sides of the base.

[0007] Preferably, the first pressure plate, the second pressure plate, the third pressure plate and the fourth pressure plate are arranged sequentially from top to bottom, and the outer surfaces of the first pressure plate, the second pressure plate, the third pressure plate and the fourth pressure plate are fitted into the inner cavity of the base.

[0008] Preferably, the outer surface of the threaded rod is threaded with a first nut, a second nut, a third nut, and a fourth nut. The first nut is located below the first pressure plate, the second nut is located between the first nut and the second pressure plate, the third nut is located below the third pressure plate, and the fourth nut is located between the third nut and the fourth pressure plate.

[0009] Preferably, the outer surface of the chemical anchor is fitted with a flat washer and a spring washer, which are disposed between the base and the external hexagonal nut.

[0010] Preferably, the end of the connecting rod is provided with a threaded portion, and a fastening nut is threadedly connected to the outer surface of the threaded portion.

[0011] Beneficial effects

[0012] This utility model provides a tunnel signal cable fixing device. It has the following advantages:

[0013] 1. This tunnel signal cable fixing device, through its base, fireproof baffle, and chemical anchors, enhances the fire resistance and stability of the fixing device. In the event of a fire, it can reduce the risk of cable detachment and prevent the spread of fire, thereby ensuring the smooth operation of traffic and the normal operation of emergency communication functions within the tunnel. The device has good tensile strength and impact strength, fully meeting the usage requirements and installation conditions for fixing signal cables within the tunnel.

[0014] 2. The tunnel signal cable fixing device has an adjustable cable clamping mechanism installed in the cavity inside the base to clamp cables of different diameters, keep the cables stable for a long time, prevent the cables from being damaged by friction between the cables and the base when subjected to external force, and reduce the frequency of maintenance. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram showing the overall disassembled structure of this utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the base of this utility model;

[0018] Figure 4 This is a schematic diagram of the cable clamping mechanism of this utility model.

[0019] In the diagram: 1. Base; 2. Anti-detachment cover; 3. Connecting rod; 4. Chemical anchor; 5. External hexagonal nut; 6. Flat washer; 7. Spring washer; 8. Fireproof baffle; 9. Cable clamping mechanism; 901. First fixing plate; 902. Threaded rod; 903. Second fixing plate; 904. First pressure plate; 905. Second pressure plate; 906. Third pressure plate; 907. Fourth pressure plate; 908. First nut; 909. Second nut; 910. Third nut; 911. Fourth nut; 10. Threaded part; 11. Fastening nut. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] like Figure 1-4 As shown, this utility model provides a tunnel signal cable fixing device, including a base 1, an anti-detachment cover 2 at the opening of the base 1, a connecting rod 3 sleeved in the through hole inside the anti-detachment cover 2, chemical anchors 4 in the through holes at the top and bottom of the base 1, an external hexagonal nut 5 threaded to the outer surface of the chemical anchor 4, a fireproof baffle 8 on the outer surface of the external hexagonal nut 5, and a cable clamping mechanism 9 in the inner cavity of the base 1. The cable clamping mechanism 9 includes a first fixing plate 901, a threaded rod 902 fixedly connected to the lower surface of the first fixing plate 901, and a first pressure plate 904, a second pressure plate 905, a third pressure plate 906 and a fourth pressure plate 907 sleeved on the outer surface of the threaded rod 902.

[0022] Specifically, a second fixing plate 903 is fixedly connected to the bottom end of the threaded rod 902. The outer surfaces of the first fixing plate 901 and the second fixing plate 903 are both fixedly connected to the outer surface of the base 1. The first fixing plate 901, the threaded rod 902 and the second fixing plate 903 are symmetrically arranged on both sides of the base 1. The symmetrical arrangement of the first fixing plate 901, the threaded rod 902 and the second fixing plate 903 ensures the stability and reliability of the entire cable clamping mechanism 9.

[0023] Specifically, the first pressure plate 904, the second pressure plate 905, the third pressure plate 906, and the fourth pressure plate 907 are arranged sequentially from top to bottom. The outer surfaces of the first pressure plate 904, the second pressure plate 905, the third pressure plate 906, and the fourth pressure plate 907 are fitted into the inner cavity of the base 1. By adjusting the relative position between the pressure plates, cables of different sizes can be accommodated, ensuring that the cables are firmly fixed in the inner cavity of the base 1. This design improves the flexibility and applicability of cable fixing.

[0024] Specifically, the outer surface of the threaded rod 902 is threaded with a first nut 908, a second nut 909, a third nut 910, and a fourth nut 911. The first nut 908 is located below the first pressure plate 904, the second nut 909 is located between the first nut 908 and the second pressure plate 905, the third nut 910 is located below the third pressure plate 906, and the fourth nut 911 is located between the third nut 910 and the fourth pressure plate 907. By rotating the nuts, the pressure plates can be moved up and down, thereby achieving a tight fixation of the cable.

[0025] Specifically, the outer surface of the chemical anchor bolt 4 is fitted with a flat washer 6 and a spring washer 7. The flat washer 6 and the spring washer 7 are positioned between the base 1 and the external hexagonal nut 5. The chemical anchor bolt 4 is used to firmly fix the base 1 to the tunnel wall, ensuring the stability and reliability of the entire fixing device.

[0026] Specifically, the end of the connecting rod 3 is provided with a threaded part 10, and a fastening nut 11 is threaded onto the outer surface of the threaded part 10. The connecting rod 3 is used to fix the anti-detachment cover 2 onto the base 1 to prevent the cable from falling out of the base 1.

[0027] The working principle of the above embodiments:

[0028] In use, the base 1 is fixed to the tunnel wall using chemical anchors 4. After secure installation, the anti-detachment cover 2 is removed. The positions of the first nut 908, second nut 909, third nut 910, and fourth nut 911 on the threaded rod 902 are adjusted so that the positions of the first pressure plate 904, second pressure plate 905, third pressure plate 906, and fourth pressure plate 907 do not affect the insertion of the cable. When inserting the signal cable into the cavity of the base 1, ensure that the cable is above the first pressure plate 904, between the second pressure plate 905 and the third pressure plate 906, or below the fourth pressure plate 907. The cavity of the base 1 can hold a maximum of three cables. By moving the first pressure plate 904 upward, the cable above it is pressed down to a state where it cannot wobble, and the first nut 908 is tightened upward to press and fix the cable above it. By moving the second pressure plate 905 and the third pressure plate 906 in opposite directions, the cable between them is pressed down to a state where it cannot wobble, and the second nut 909 is tightened downward, and the third nut 907 is tightened upward. Nut 910 presses the cable between the second pressure plate 905 and the third pressure plate 906 into place. Moving the fourth pressure plate 907 downwards presses the cable below it until it cannot move, and tightening the fourth nut 911 downwards further presses the cable below it into place. The cable clamping mechanism 9 secures the cable, maintaining its long-term stability and preventing damage from friction between the cable and base 1 when subjected to external forces, thus reducing maintenance frequency. After securing the cable, place the anti-detachment cover 2 as shown in the diagram, insert the connecting rod 3, and tighten the fastening nut 11 at the threaded part 10 of the connecting rod 3 to ensure the connecting rod 3 cannot fall off. After installing the anti-detachment cover 2, install the fireproof baffle 8 as shown in the diagram, and secure it firmly using the external hexagonal nut 5 and its cotter pin. The fireproof baffle 8 ensures that the cable will not fall off in the event of a fire, reducing unnecessary losses. The base 1 is made of flame-retardant ASA material, which has significant weather resistance, in accordance with GB / T... The device meets the solar radiation resistance test standard 2423.24-2013, with a total radiation of 8.96 kW·h / m² per cycle. Its low-temperature resistance meets the requirement of -40℃, high-temperature resistance meets the requirement of 150℃, and alternating damp heat resistance meets the requirements of -25℃ to 80℃ and relative humidity of 93%. It also possesses good tensile strength and impact strength, fully meeting the usage requirements and installation conditions for fixing signal cables in tunnels. All metal fittings of the fixing device meet the requirements of a 240-hour neutral salt spray test and can be used normally in humid environments. The chemical anchor 4 is made of high-carbon steel, and its tensile, shear, and seismic performance all meet the "S" level requirements in the JG / T 160-2017 standard.

[0029] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A tunnel signal cable fixing device, comprising a base (1), characterized in that: The base (1) is provided with an anti-detachment cover (2) at the opening. A connecting rod (3) is sleeved in the through hole inside the anti-detachment cover (2). Chemical anchors (4) are provided in the through holes at the top and bottom of the base (1). An external hexagonal nut (5) is threaded on the outer surface of the chemical anchor (4). A fireproof baffle (8) is provided on the outer surface of the external hexagonal nut (5). A cable clamping mechanism (9) is provided in the inner cavity of the base (1). The cable clamping mechanism (9) includes a first fixing plate (901). A threaded rod (902) is fixedly connected to the lower surface of the first fixing plate (901). A first pressure plate (904), a second pressure plate (905), a third pressure plate (906), and a fourth pressure plate (907) are sleeved on the outer surface of the threaded rod (902).

2. The tunnel signal cable fixing device according to claim 1, characterized in that: The bottom end of the threaded rod (902) is fixedly connected to a second fixing plate (903). The outer surfaces of the first fixing plate (901) and the second fixing plate (903) are both fixedly connected to the outer surface of the base (1). The first fixing plate (901), the threaded rod (902) and the second fixing plate (903) are symmetrically arranged on both sides of the base (1).

3. The tunnel signal cable fixing device according to claim 1, characterized in that: The first pressure plate (904), the second pressure plate (905), the third pressure plate (906) and the fourth pressure plate (907) are arranged sequentially from top to bottom, and the outer surfaces of the first pressure plate (904), the second pressure plate (905), the third pressure plate (906) and the fourth pressure plate (907) are fitted into the inner cavity of the base (1).

4. The tunnel signal cable fixing device according to claim 1, characterized in that: The outer surface of the threaded rod (902) is threaded with a first nut (908), a second nut (909), a third nut (910), and a fourth nut (911). The first nut (908) is located below the first pressure plate (904), the second nut (909) is located between the first nut (908) and the second pressure plate (905), the third nut (910) is located below the third pressure plate (906), and the fourth nut (911) is located between the third nut (910) and the fourth pressure plate (907).

5. A tunnel signal cable fixing device according to claim 1, characterized in that: The outer surface of the chemical anchor (4) is fitted with a flat washer (6) and a spring washer (7), which are positioned between the base (1) and the external hexagonal nut (5).

6. A tunnel signal cable fixing device according to claim 1, characterized in that: The end of the connecting rod (3) is provided with a threaded part (10), and a fastening nut (11) is threadedly connected to the outer surface of the threaded part (10).

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