Cable buffer

Abstract

The utility model relates to a cable buffer, and belongs to the technical field of cable protection equipment. The cable buffer comprises an assembly box, a mounting hook, a fixed pulley, a movable pulley and a traction roller pair, a plurality of hanging hooks are mounted at the top end of the assembly box; a fixed pulley is arranged in the assembly box; a movable pulley is movably arranged in the assembly box below the fixed pulley through a sliding chute; and two groups of traction rollers are symmetrically mounted in the assembly box above the fixed pulley. The cable buffer is compact in structure and ingenious in design, solves the problems that an existing protection device is prone to damage and failure and narrow in application range due to the fact that a coil spring needs to be used, and is particularly suitable for cable laying and using.

Description

Technical Field

[0001] The utility model relates to a cable buffer, belonging to the technical field of cable protection equipment. Background Art

[0002] In daily life, during the laying process of cables, in order to prevent the problem of cable damage caused by thermal expansion and contraction, protection devices need to be set at certain intervals to enable them to contract the cable in hot weather and output the cable in cold weather. The existing protection devices, such as a protection device for communication cables disclosed in the utility model patent with the authorization announcement number CN217102561U, although it can meet the usage requirements to a certain extent, it has the following problems:

[0003] The power of the existing protection device is provided by a torsion spring inside, and the torsion spring belongs to a vulnerable part. Once it breaks, it will inevitably cause the existing protection device to be unable to be put into use, resulting in the problem of failure.

[0004] The existing protection device has a box structure and must be installed on a solid support to be used. However, during the cable laying process in some special occasions, such as in old residential areas, many cables are directly hung on the steel wire traction rope, and it is difficult for the existing protection device to be directly installed on the steel wire traction rope, having the problem of narrow adaptation range.

[0005] Therefore, it is necessary to develop a new cable buffer to solve the above problems existing in the existing cable protection devices. Summary of the Invention

[0006] The purpose of the utility model is to provide a cable buffer with a compact structure and ingenious design to solve the problems of easy damage and failure and narrow adaptation range existing in the existing cable protection devices.

[0007] The technical solution of the utility model is as follows:

[0008] A cable buffer includes an assembly box, a hanging hook, a fixed pulley, a movable pulley and a traction pair of rollers, and is characterized in that: a plurality of hanging hooks are installed at the top end of the assembly box; a fixed pulley is installed inside the assembly box; a movable pulley is movably installed inside the assembly box below the fixed pulley through a chute; two groups of traction pair of rollers are symmetrically installed inside the assembly box above the fixed pulley.

[0009] A plurality of guide ring grooves are arranged on the surfaces of the fixed pulley and the movable pulley; the guide ring grooves on the fixed pulley correspond to the guide ring grooves on the movable pulley one by one.

[0010] Two groups of spacer plates are symmetrically installed on both sides below the fixed pulley; a plurality of spacer holes are evenly distributed on the spacer plates; the spacer holes correspond to the guide ring grooves on the fixed pulley and the movable pulley.

[0011] A plurality of connecting lugs are arranged inside the assembly box described above.

[0012] The traction pair of rollers includes an upper traction roller and a lower traction roller; the upper traction roller is installed inside the assembly box; the lower traction roller is installed below the upper traction roller; traction ring grooves are arranged on both the upper traction roller and the lower traction roller.

[0013] The hanging hook includes a hook body, a blocking piece, and a locking screw; the hook body is hinged and installed at the top end of the assembly box; the end of the hook body is hinged and connected with a blocking piece through a torsion spring; the lower end of the blocking piece is in contact connection with the hook body; a locking screw is threadedly connected to the hook body on one side of the blocking piece.

[0014] The advantages of the present utility model are as follows:

[0015] The cable buffer has a compact structure and ingenious design, and can buffer the cable through a fixed pulley and a movable pulley; when the length of the cable changes due to temperature after assembly, it will drive the movable pulley to move up and down, so as to achieve the purpose of contracting or releasing the cable, thus solving the problems of easy damage and failure and narrow application range caused by the existing protection device using a coil spring, and is particularly suitable for the needs of cable laying. Description of the Drawings

[0016] Figure 1 It is a front view structural schematic diagram of the present utility model;

[0017] Figure 2 is Figure 1 the structural schematic diagram in the A-A direction of

[0018] Figure 3 It is a working state structural schematic diagram of the present utility model;

[0019] Figure 4 is Figure 1 the enlarged structural schematic diagram at B in

[0020] In the figure: 1. Assembly box; 2. Hanging hook; 3. Fixed pulley; 4. Chute; 5. Movable pulley; 6. Traction pair of rollers; 7. Guide ring groove; 8. Spacer; 9. Spacing hole; 10. Connecting lug; 11. Upper traction roller; 12. Lower traction roller; 13. Traction ring groove; 14. Hook body; 15. Blocking piece; 16. Locking screw; 17. Cable. Detailed Embodiments

[0021] The cable buffer includes an assembly box 1, a hanging hook 2, a fixed pulley 3, a movable pulley 5, and a traction pair of rollers 6 (see the attached Figure 1 ) of the specification.

[0022] A plurality of hanging hooks 2 are installed at the top end of the assembly box 1 (see the attached Figure 1 and2 ). The hanging hook 2 includes a hook body 14, a blocking piece 15 and a locking screw 16 (see the attached drawings of the specification Figure 4 ). The hook body 14 is hingedly installed at the top end of the assembly box 1; the end of the hook body 14 is hingedly connected with a blocking piece 15 through a torsion spring; the lower end of the blocking piece 15 is in contact connection with the hook body 14; a locking screw 16 is threadedly connected to the hook body 14 on one side of the blocking piece 15.

[0023] The purpose of setting the hanging hook 2 in this way is that when the cable buffer is assembled on the steel wire towing rope, the cable buffer can be hung on the steel wire towing rope of the cable assembly through the hook body 14. At this time, the blocking piece 15 can limit the steel wire towing rope inside the hook body 14, so as to avoid the problem that the hanging hook 2 is separated from the steel wire towing rope. Then, tighten the locking screw 16, and the steel wire towing rope can be pressed and fixed with the hook body 14, so as to achieve the purpose of fixing the cable buffer on the steel wire towing rope through the hanging hook 2, thus solving the problem that the existing protection device is difficult to be directly installed on the steel wire towing rope and has a narrow adaptation range.

[0024] A plurality of connecting lugs 10 are arranged inside the assembly box 1 (see the attached drawings of the specification Figure 3 ). The purpose of setting the connecting lugs 10 is that when the cable buffer needs to be installed on an entity object such as a telegraph pole or a building, the cable buffer can be installed on the entity object through the connecting lugs 10.

[0025] A fixed pulley 3 is installed inside the assembly box 1; a movable pulley 5 is movably installed inside the assembly box 1 below the fixed pulley 3 through a chute 4 (see the attached drawings of the specification Figure 1 and 2 ). When the movable pulley 5 is stressed, it can move up and down under the guidance of the chute 4.

[0026] A plurality of guide ring grooves 7 are arranged on the surfaces of both the fixed pulley 3 and the movable pulley 5; the guide ring grooves 7 on the fixed pulley 3 and the guide ring grooves 7 on the movable pulley 5 are in one-to-one correspondence. The purpose of setting the guide ring grooves 7 in this way is that when working, the cable 17 can be wound between the fixed pulley 3 and the movable pulley 5 through the guide ring grooves 7 (see the attached drawings of the specification Figure 3 ), so as to avoid the winding problem caused by the cable 17 sliding randomly on the surfaces of the fixed pulley 3 and the movable pulley 5 when the fixed pulley 3 and the movable pulley 5 are in a smooth wheel state.

[0027] Two groups of spacer plates 8 are symmetrically installed on both sides below the fixed pulley 3; a plurality of spacer holes 9 are evenly distributed on the spacer plates 8; the spacer holes 9 correspond to the guide ring grooves 7 on the fixed pulley 3 and the movable pulley 5 (see the attached drawings of the specification Figure 1 and 3). The purpose of setting the spacer 8 is that during assembly, the cable 17 needs to pass through the spacer holes 9 on the spacer 8 before being wound around the fixed pulley 3 and the movable pulley 5. In this way, the spacer 8 can separate adjacent cables 17 from each other, thus avoiding the problem of entanglement between the cables 17.

[0028] Two sets of traction counter-rollers 6 are symmetrically installed inside the assembly box 1 above the fixed pulley 3 (see the attached Figure 2 ). The traction counter-roller 6 includes an upper traction roller 11 and a lower traction roller 12; the upper traction roller 11 is installed inside the assembly box 1; the lower traction roller 12 is installed below the upper traction roller 11; traction ring grooves 13 are provided on both the upper traction roller 11 and the lower traction roller 12 (see the attached Figure 1 ).

[0029] The purpose of setting the traction counter-roller 6 in this way is that during operation, the cable 17 can enter or exit the cable buffer under the guidance of the upper traction roller 11 and the lower traction roller 12, thus avoiding the problem of collision and wear between the cable 17 and the assembly box 1 during operation.

[0030] When the cable buffer is in operation, first, the cable buffer needs to be installed in a suitable position through the hanging hook 2 or the connecting lug 10. Subsequently, one end of the cable 17 is passed through one set of traction counter-rollers 6 and into the interior of the assembly box 1, then the cable 17 is wound around the fixed pulley 3 and the movable pulley 5 through the spacer 8, and finally output through the other set of traction counter-rollers 6 (see the attached Figure 3 ). After the above process is completed, the position of the movable pulley 5 needs to be adjusted by pulling the cable 17 so that it is in the middle position of the sliding groove 4, thus avoiding the problem that it is difficult to move and cannot be used normally when the movable pulley 5 is in the extreme position.

[0031] When the cable buffer is assembled and the cable 17 undergoes cold shrinkage in winter, the cable 17 inside the cable buffer will be subjected to tensile forces at both ends, causing the cable 17 to drive the movable pulley 5 to move upward, thus achieving the release of the cable 17 and preventing the cable 17 from being stretched and broken.

[0032] When the cable 17 undergoes thermal expansion in summer and the cable 17 becomes longer, the movable pulley 5 will drive the cable to move downward under the action of its own gravity, so that the cable buffer can pull the external cable 17 into its interior, thus avoiding the problem that the external cable 17 becomes loose when it becomes longer.

[0033] This cable buffer has a compact structure and ingenious design, and can buffer the cable through the fixed pulley 3 and the movable pulley 5; when the length of the cable changes due to temperature after assembly, it will drive the movable pulley 5 to move up and down, so as to achieve the purpose of contracting or releasing the cable. Each component in this cable buffer is a mature component with a long service life and will not be easily damaged, thus solving the problems of easy damage and failure and narrow application range caused by the use of coil springs in existing protection devices, and is particularly suitable for the needs of cable laying.

Claims

1. A cable buffer, comprising an assembly box (1), a hanging hook (2), a fixed pulley (3), a movable pulley (5) and a traction pair of rollers (6), characterized in that: A plurality of hanging hooks (2) are installed at the top of the described assembly box (1); a fixed pulley (3) is installed inside the assembly box (1); a movable pulley (5) is movably installed in the assembly box (1) below the fixed pulley (3) through a chute (4); two groups of traction pairs of rollers (6) are symmetrically installed in the assembly box (1) above the fixed pulley (3).

2. The cable buffer according to claim 1, characterized in that: A plurality of guide ring grooves (7) are provided on the surfaces of the fixed pulley (3) and the movable pulley (5); the guide ring grooves (7) on the fixed pulley (3) correspond one by one to the guide ring grooves (7) on the movable pulley (5).

3. The cable buffer according to claim 2, wherein: Two groups of spacer plates (8) are symmetrically installed on both sides below the fixed pulley (3); a plurality of spacer holes (9) are evenly distributed on the spacer plates (8); the spacer holes (9) correspond to the guide ring grooves (7) on the fixed pulley (3) and the movable pulley (5).

4. The cable buffer according to claim 1, characterized in that: A plurality of connecting lugs (10) are provided on the inner side of the assembly box (1).

5. A cable buffer according to claim 1, characterized in that: The traction pair of rollers (6) includes an upper traction roller (11) and a lower traction roller (12); the upper traction roller (11) is installed in the assembly box (1); the lower traction roller (12) is installed below the upper traction roller (11); traction ring grooves (13) are provided on both the upper traction roller (11) and the lower traction roller (12).

6. A cable buffer according to claim 1, characterized in that: The hanging hook (2) includes a hook body (14), a blocking piece (15) and a locking screw (16); the hook body (14) is hingedly installed at the top end of the assembly box (1); the end of the hook body (14) is hingedly connected with a blocking piece (15) through a torsion spring; the lower end of the blocking piece (15) is in contact connection with the hook body (14); a locking screw (16) is threadedly connected to the hook body (14) on one side of the blocking piece (15).

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