Bridge steel column cable laying protection device

Abstract

The utility model aims to provide a bridge steel column cable laying protection device, which belongs to the technical field of overhead line system power supply line cable laying and comprises a pulley and a bracket with a U-shaped section, two ends of the bracket are connected with two ends of the pulley, and a support connected with a bridge stand column square tube is arranged at the bottom of the bracket. The inner side of the support is gradually enlarged from top to bottom, wedge-shaped cushion blocks are arranged on the inner side of the support, the wedge-shaped cushion blocks are connected through an adjusting rod, and one end of the adjusting rod penetrates through the connecting end of the support and the bracket. According to the utility model, the cable is always located in the pulley after outgoing from the wire coil, and the cable is always located in the clearance between the bridge handrail guardrail and the catenary pillar (equipment fitting), so that the working space is fully utilized.

Description

Technical Field

[0001] This utility model belongs to the field of overhead contact line power cable laying technology, specifically relating to a protective device for cable laying on bridge steel columns. Background Technology

[0002] In areas with favorable geological conditions, such as traction substations, AT stations, and sectioning stations of high-speed railways, power supply lines are generally erected. However, in mountainous areas where railway lines cross mountains, rivers, deep valleys, or other special terrains and are located on bridges or in tunnels, overhead lines are not feasible. Therefore, laying power supply lines using cables is the best option.

[0003] Currently, cable laying methods include direct burial, cable trench laying, and bridge pier laying. High-speed railways generally use direct burial in suburban areas and areas without vehicle traffic, shallow cable trenches are generally used outside the railway subgrade, and bridge piers are generally used for cable laying on bridges. Laying cables on bridges presents the following problems: after the cable piers are installed, the pulleys have no installation location due to clearance limitations; according to current designs, no contact wire cable trench is reserved, resulting in very little clearance between the bridge railings and the contact wire supports, which can scratch the cable sheath. Equipment is present at the cable laying location, and the installation of hardware further reduces the clearance between the bridge railings and the contact wire supports, and the equipment hardware also affects the appearance of the sheath. Before cable pier installation, exposed pre-embedded chemical anchors affect pulley arrangement; exposed pre-embedded chemical anchors are also prone to scratching the cable.

[0004] Hazards of cable outer sheath damage: It may lead to water ingress into the cable and failure of its anti-corrosion function; the metal armor layer of the power cable will generate induced current, and when the outer sheath of the cable is damaged, it will cause electrochemical corrosion or electric spark discharge to damage the metal armor layer; when a single-phase ground fault occurs in the power system, the fault current is very large, and the induced voltage on the metal armor layer will increase. If the sheath is damaged, it will be broken down and the metal layer will be burned, and it may even damage the main insulation of the cable; after the outer sheath is damaged and broken down, the cable line will form multiple grounding points, and circulating current loss will be generated on the metal armor, reducing the current carrying capacity of the cable and affecting power transmission.

[0005] To address the aforementioned issues, care must be taken during cable laying to prevent damage to the outer sheath and ensure good insulation performance. Therefore, using steel bridge columns and protective pulleys for cable laying can effectively protect the cable's outer layer from scratches by hard objects, avoiding quality problems during cable replacement caused by construction damage to the cable's outer layer. Utility Model Content

[0006] The purpose of this utility model is to provide a protective device for cable laying on bridge steel columns to prevent damage to the outer sheath of the cable.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] A cable laying protection device for bridge steel columns includes pulleys and a bracket with a U-shaped cross-section. The two ends of the bracket are connected to the two ends of the pulleys. The bottom of the bracket is provided with a support that is connected to the square tube of the bridge column. The inner side of the support gradually increases from top to bottom. The inner side of the support is provided with a wedge-shaped pad. The wedge-shaped pad is connected by an adjusting rod. One end of the adjusting rod passes through the connection end between the support and the bracket.

[0009] Furthermore, the protective device also includes an adjusting handle, the center of which is provided with a sleeve that matches the adjusting rod.

[0010] Furthermore, the connecting ends of the bracket and the support are provided with through holes for the adjustment rod to pass through, and the four apex corners of the through holes are respectively provided with fixing holes, and fastening bolts are provided in the fixing holes.

[0011] Furthermore, a locking nut is provided at one end of the adjusting rod that passes through the bracket and the support, and a positioning retaining ring is provided on the locking nut.

[0012] Furthermore, the adjusting rod is provided with external threads, and the wedge-shaped pad is provided with a through hole with internal threads at its center, and the wedge-shaped pad is threadedly connected to the adjusting rod.

[0013] Furthermore, positioning retaining rings are provided on the upper and lower sides of the wedge-shaped pad.

[0014] The beneficial effects of this utility model are as follows:

[0015] 1. By using this utility model, the cable is always inside the pulley after exiting the cable reel, and the cable is always within the clearance between the bridge railing and the contact wire support (equipment hardware), making full use of the working space;

[0016] 2. The installation position of the pulley was changed from the ground to the top of the column, so that the cable will not come into contact with any sharp objects during the cable laying process, thus achieving effective protection of the cable sheath;

[0017] 3. This utility model allows for the replacement of the lower support frame depending on the material selected for the upright, making it more practical;

[0018] 4. The lower support can be disassembled and replaced with the base for reuse in the roadbed and tunnel, saving construction costs;

[0019] 5. Installing protective pulleys for cable laying inside the steel bridge columns can reduce the mutual interference between fastening devices and cable hangers;

[0020] 6. Using this utility model to lay cables can reduce the risk of cable scratches and significantly reduce the number of monitoring personnel. Attached Figure Description

[0021] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0023] Figure 3 This is a top view of the structure of this utility model;

[0024] Figure 4 This is a schematic diagram of the right-side structure of this utility model;

[0025] Figure 5 This is an exploded view of the present invention;

[0026] Figure 6 This is a schematic diagram of the usage state of this utility model;

[0027] Wherein: 1-Pulley; 2-Bracket; 3-Support; 4-Wedge-shaped pad; 5-Adjusting rod; 6-Adjusting handle; 7-Fastening bolt; 8-Locking nut; 9-Positioning retaining ring. Detailed Implementation

[0028] The present invention will be further described with reference to the accompanying drawings.

[0029] As shown in the figure, a cable laying protection device for bridge steel columns includes a pulley 1 and a bracket 2 with a U-shaped cross-section. The two ends of the bracket 2 are connected to the two ends of the pulley 1. The bottom of the bracket 2 is provided with a support 3 that is connected to the square tube of the bridge column. The inner side of the support 3 gradually increases from top to bottom. The inner side of the support is provided with a wedge-shaped pad 4. The wedge-shaped pad 4 is connected by an adjusting rod 5. One end of the adjusting rod 5 passes through the connection end between the support 3 and the bracket 2.

[0030] Furthermore, the protective device also includes an adjusting handle 6, the center of which is provided with a sleeve that matches the adjusting rod 5.

[0031] Furthermore, the connecting ends of the bracket 2 and the support 3 are provided with through holes for the adjustment rod 5 to pass through, and the four apex corners of the through holes are respectively provided with fixing holes, and fastening bolts 7 are provided in the fixing holes.

[0032] Furthermore, a locking nut 8 is provided at one end of the adjusting rod 5 that passes through the bracket 3 and the support 2, and a positioning retaining ring 9 is provided on the locking nut 8.

[0033] Furthermore, the adjusting rod 5 is provided with external threads, and the wedge-shaped pad 4 is provided with a through hole with internal threads at its center. The wedge-shaped pad 4 is threadedly connected to the adjusting rod 5.

[0034] Furthermore, positioning retaining rings 9 are provided on the upper and lower sides of the wedge-shaped pad 4 respectively.

[0035] The method of using this utility model is as follows:

[0036] Insert the adjusting handle 4;

[0037] Place the bracket 4 into the square tube of the bridge column, and rotate the adjusting handle 6 to move the wedge-shaped pad 4 up and down to adjust the gap between the bracket and the square tube of the bridge column, so as to achieve the purpose of fastening.

[0038] In the specific construction process, a winch is set at the end of the anchor section, the protective device of this utility model is installed on the top of the column, the traction rope is laid out along the fixed cable protection pulley, the cable head is fixed with a wire mesh sleeve, the cable is laid out, and the cable is put into the trench.

[0039] By using this utility model, the problems of insufficient clearance between bridge steel columns and cable columns, excessive manpower consumption for cable laying, the inability to lay pulleys after the installation of different types of cable supports (rectangular tubes, channel steel, etc.), and the construction quality problems of hard protrusions scratching the cable sheath during cable laying are effectively avoided in the existing construction technology.

Claims

1. A bridge steel column cable laying protection device, characterized in that: It includes a pulley (1) and a bracket (2) with a U-shaped cross section. The two ends of the bracket (2) are connected to the two ends of the pulley (1). The bottom of the bracket (2) is provided with a support (3) connected to the square tube of the bridge column. The inner side of the support (3) gradually increases from top to bottom. The inner side of the support is provided with a wedge-shaped pad (4). The wedge-shaped pad (4) is connected by an adjusting rod (5). One end of the adjusting rod (5) passes through the connection end of the support (3) and the bracket (2).

2. A bridge steel column cable protection device according to claim 1, characterized in that: The protective device also includes an adjusting handle (6), the center of which is provided with a sleeve that matches the adjusting rod (5).

3. A bridge steel column cable protection device according to claim 1, characterized in that: The connecting ends of the bracket (2) and the support (3) are provided with through holes for the adjustment rod (5) to pass through. The four corners of the through holes are respectively provided with fixing holes, and fastening bolts (7) are provided in the fixing holes.

4. A bridge steel column cable protection device according to claim 1, characterized in that: The adjusting rod (5) has a locking nut (8) at one end that passes through the bracket (3) and the support (2), and a positioning retaining ring (9) is provided on the locking nut (8).

5. A bridge steel column cable protection device according to claim 1, characterized in that: The adjusting rod (5) is provided with an external thread, and the wedge-shaped pad (4) is provided with a through hole with an internal thread in the center. The wedge-shaped pad (4) is threadedly connected to the adjusting rod (5).

6. A bridge steel column cable protection device according to claim 1, characterized in that: The wedge-shaped pad (4) is provided with positioning retaining rings (9) on its upper and lower sides respectively.

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