Cable tensioning device

Abstract

The utility model discloses a cable tensioning device, which relates to the technical field of cable installation and comprises a protective cover, guide assemblies used for guiding a cable are arranged on two sides of the bottom end of the protective cover, a tensioning assembly is arranged in the protective cover, the tensioning assembly comprises a pulley block and a pull rope arranged on the pulley block, and the pull rope is arranged on the pulley block. A counterweight assembly is hoisted at the free end of the pull rope, two rotating wheels are installed at the bottom end of a movable pulley of the pulley block, the two rotating wheels are arranged up and down, and the cable passes through the space between the two rotating wheels. The utility model has the advantages that the working reliability is high, and faults are not easy to occur.

Description

Technical Field

[0001] This utility model relates to the field of cable installation technology, and in particular to a cable tensioning device. Background Technology

[0002] In the existing technology, long-span cable laying is usually accomplished by high supports. Due to the large temperature difference between summer and winter, cables expand and contract with temperature changes. Therefore, tensioning devices are needed to keep the cables within an appropriate tension range.

[0003] Patent CN115833003B discloses a cable tensioning system. This system, with its adjustable length between supports, effectively solves the problems of cable sagging and excessive tension caused by thermal expansion and contraction, ensuring the cable maintains proper tension and thus extending its normal service life. By incorporating adjustable support rods and a simple, automatically operating telescopic mechanism, the system automatically adjusts the length of the support rods, thereby enabling convenient and automatic adjustment of the cable tension and ensuring its proper tension, ultimately guaranteeing its normal service life.

[0004] However, according to its instruction manual and accompanying drawings, the thermometer is a critical component. Once the thermometer malfunctions, the entire device will become ineffective. However, the thermometer is exposed to the external environment for a long time, and natural factors such as sunlight, rain, snow, wind, and ice will damage it. In addition, chemical components in the air will also corrode the thermometer. Therefore, the thermometer has a short service life, a high failure rate, and low device reliability.

[0005] Therefore, it is necessary to develop a cable tensioning device to address the aforementioned shortcomings. Utility Model Content

[0006] The purpose of this invention is to provide a cable tensioning device that has the advantages of high reliability and low failure rate.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0008] This utility model discloses a cable tensioning device, including a protective cover. Guide components for guiding the cable are installed on both sides of the bottom end of the protective cover. A tensioning component is installed inside the protective cover. The tensioning component includes a pulley block and a pull rope disposed on the pulley block. A counterweight component is suspended at the free end of the pull rope. Two rotating wheels are installed at the bottom end of the movable pulley of the pulley block. The two rotating wheels are arranged vertically, and the cable passes between the two rotating wheels.

[0009] Optionally, the pulley block further comprises a first fixed pulley, the first fixed pulley is fixedly connected with the top plate of the protective cover, one end of the pull rope is fixedly connected with the bottom end of the first fixed pulley, and the free end of the pull rope passes the lower surface of the wheel body of the movable pulley and the upper surface of the wheel body of the first fixed pulley in sequence.

[0010] Optionally, a first sliding rail is vertically fixed on the inner wall of the protective cover, a first dovetail sliding block is fixed on one side of the movable pulley, and the first dovetail sliding block is in sliding connection with the first sliding rail.

[0011] Optionally, the pulley block further comprises a second fixed pulley and a third fixed pulley, the second fixed pulley is fixedly connected with the top plate of the protective cover, the rotation axis of the wheel body of the second fixed pulley is vertically arranged, the third fixed pulley is fixedly connected with the top plate of the protective cover, the rotation axis of the wheel body of the third fixed pulley is horizontally arranged, and the free end of the pull rope is in L-shaped and passes the surface of the wheel body of the second fixed pulley and the surface of the wheel body of the third fixed pulley in sequence and freely drops.

[0012] Optionally, the counterweight assembly comprises a supporting plate and counterweight blocks, the supporting plate is coaxially arranged with the free end of the pull rope, the supporting plate is fixedly connected with the free end of the pull rope, and a plurality of the counterweight blocks are stacked on the supporting plate and are clamped between adjacent counterweight blocks.

[0013] Optionally, a second sliding rail is vertically fixed on the inner wall of the protective cover, a second dovetail sliding block is fixed on the circumferential wall of the supporting plate, and the second dovetail sliding block is in sliding connection with the second sliding rail.

[0014] Optionally, the guide assembly comprises two guide wheels and two hanging plates, the top ends of the two hanging plates are fixedly connected with the bottom end of the protective cover, the two guide wheels are arranged in an up-down mode, the guide wheels are rotationally connected between the two hanging plates, and the cable passes between the two guide wheels.

[0015] Optionally, one side plate of the protective cover is a detachable movable plate.

[0016] Compared with the prior art, the utility model has the beneficial technical effects that:

[0017] Through the ingenious cooperation of the pulley block, the pull rope and the counterweight assembly, automatic tensioning of the cable is realized, so that the length change of the cable due to thermal expansion and cold contraction in different seasons is adapted. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model will be further described in connection with the drawings.

[0019] Figure 1 It is a three-dimensional structure schematic view of the utility model;

[0020] Figure 2 It is another angle of the three-dimensional structure schematic view of the utility model;

[0021] Figure 3 It is the internal structure schematic view of the utility model;

[0022] Figure 4 It is the three-dimensional structure schematic view of the tensioning assembly of the utility model;

[0023] Figure 5 It is the three-dimensional structure schematic view of the supporting plate of the utility model;

[0024] Figure 6 It is the three-dimensional structure schematic view of the counterweight of the utility model;

[0025] Figure 7 It is the three-dimensional structure schematic view of Figure 6 It is the three-dimensional structure schematic view of

[0026] Figure 8 It is the internal structure schematic view of the protective cover of the utility model;

[0027] Figure 9 It is the three-dimensional structure schematic view of the rotating pin of the utility model;

[0028] Figure 10 It is the three-dimensional structure schematic view of the movable plate of the utility model.

[0029] The figure mark explanation: 15, the blocking block;14, the rotating pin;13, the hanging plate;12, the guide wheel;11, the hoop;1003, the taper hole;1002, the notch;1001, the taper;10, the counterweight;902, the second swallow-tail sliding block;901, the positioning block;9, the supporting plate;8, the third fixed pulley;7, the second fixed pulley;6, the first fixed pulley;5, the rotating wheel;401, the first swallow-tail sliding block;4, the movable pulley;3, the pull rope;2, the cable;105, the opening;104, the board;103, the movable plate;102, the second sliding rail;101, the first sliding rail;1, the protective cover. DETAILED DESCRIPTION

[0030] The utility model discloses a cable tensioning device, which has the advantages of high working reliability and low failure rate.

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described in combination with the drawings in the embodiments of the utility model. Apparently, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0032] In the description of the utility model, it is understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", "middle" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.

[0033] In some embodiments, including the protective cover 1, the bottom end of the protective cover 1 is provided with a guide assembly for guiding the cable 2, and a tensioning assembly is installed in the protective cover 1, the tensioning assembly comprising a pulley block and a pull rope 3 arranged on the pulley block, the free end of the pull rope 3 is hoisted with a counterweight assembly, the bottom end of the movable pulley 4 of the pulley block is provided with two rotating wheels 5, the two rotating wheels 5 are arranged in an upper and lower manner, and the cable 2 passes between the two rotating wheels 5.

[0034] Specifically, according to the actual application, the cable 2 can be arranged in the mode shown in the figure, that is, the cable 2 passes through the guide assembly, the rotating wheel 5 and the other guide assembly in turn, and then the cable 2 is connected with the wiring terminal on the high support; another arrangement mode is that the cable 2 is directly connected with the wiring terminal on the high support after passing through the rotating wheel 5.

[0035] The protective cover 1 can be made of stainless steel material or insulating material.

[0036] The utility model utilizes the principle of pulley block: when the cable 2 contracts in winter, the length of the cable 2 between adjacent high supports becomes shorter, the tensioning force becomes larger, and the downward pulling force of the movable pulley 4 becomes larger, since the lifting force of the counterweight assembly on the movable pulley 4 through the pull rope 3 is constant, the movable pulley 4 automatically descends to compensate for the length of the cable 2, when the pulling force of the cable 2 on the movable pulley 4 and the lifting force of the pull rope 3 on the movable pulley 4 are rebalanced, the movable pulley 4 stops descending; in summer, the cable 2 elongates, the length of the cable 2 between adjacent high supports becomes larger, the pulling force of the cable 2 on the movable pulley 4 becomes smaller, and the counterweight assembly descends, so that the movable pulley 4 rises, the length of the cable 2 between the high supports becomes smaller, when the pulling force of the cable 2 on the movable pulley 4 and the lifting force of the pull rope 3 on the movable pulley 4 are rebalanced, the movable pulley 4 stops rising; in summary, the utility model adopts a pure mechanical structure, and the cable 2 can be automatically tensioned through the arrangement of the pulley block, the pull rope 3 and the counterweight assembly, so as to adapt to the length change of the cable 2 due to thermal expansion and cold contraction in different seasons, and has the advantages of high working reliability and low failure rate.

[0037] The protective cover 1 is fixedly connected with the high support, such as welding or bolting or riveting.

[0038] The pull rope 3 can be a steel wire rope or other anti-tension rope.

[0039] In some embodiments, the pulley set further comprises a first fixed pulley 6 fixedly connected with the top plate of the protective cover 1, one end of the pull rope 3 is fixedly connected with the bottom end of the first fixed pulley 6, and the free end of the pull rope 3 is sequentially wound around the lower surface of the wheel body of the driven pulley 4 and the upper surface of the wheel body of the first fixed pulley 6.

[0040] Specifically, the pulley set has the feature of labor saving, thereby being capable of reducing the weight requirement of the counterweight assembly. In the drawings, the setting mode with one first fixed pulley 6 and one driven pulley 4 is shown, and in actual application, multiple first fixed pulleys 6 and multiple driven pulleys 4 can be provided to achieve more complex labor saving effect.

[0041] Since the weight of the counterweight assembly is constant, the pulling force of the counterweight assembly on the pull rope 3 is constant, and the upward pulling force of the pull rope 3 on the driven pulley 4 is constant. When the cable 2 contracts in winter, the downward pulling force of the cable 2 on the driven pulley 4 will increase, the driven pulley 4 will descend, the length of the cable 2 between adjacent high supports will increase, and the pulling force of the cable 2 on the driven pulley 4 will decrease. When the pulling force of the cable 2 on the driven pulley 4 and the pulling force of the pull rope 3 on the driven pulley 4 are rebalanced, the driven pulley 4 stops descending. When the cable 2 elongates in summer, the pulling force of the cable 2 on the driven pulley 4 decreases, the counterweight assembly descends, and the driven pulley 4 rises. When the pulling force of the cable 2 on the driven pulley 4 and the pulling force of the pull rope 3 on the driven pulley 4 are rebalanced, the driven pulley 4 stops rising.

[0042] In some embodiments, a first sliding rail 101 is vertically fixed on the inner wall of the protective cover 1, and a first dovetail sliding block 401 is fixed on one side of the driven pulley 4 and is in sliding connection with the first sliding rail 101.

[0043] Specifically, the first dovetail sliding block 401 cooperates with the first sliding rail 101 to limit the driven pulley 4, thereby enhancing the stability of the driven pulley 4 and preventing the driven pulley 4 from being deflected under the pulling action of the cable 2.

[0044] In some embodiments, a second fixed pulley 7 and a third fixed pulley 8 are further provided, the second fixed pulley 7 is fixedly connected with the top plate of the protective cover 1, the rotation axis of the wheel body of the second fixed pulley 7 is vertically arranged, the third fixed pulley 8 is fixedly connected with the top plate of the protective cover 1, the rotation axis of the wheel body of the third fixed pulley 8 is horizontally arranged, and the free end of the pull rope 3 is L-shaped and sequentially wound around the surface of the wheel body of the second fixed pulley 7 and the surface of the wheel body of the third fixed pulley 8 and freely hangs downward.

[0045] Specifically, the provision of the second fixed pulley 7 and the third fixed pulley 8 can enable the free end of the pull rope 3 to be located on one side of the cable 2, thereby avoiding the influence of the counterweight assembly on the cable 2.

[0046] In some embodiments, the counterweight assembly comprises a supporting plate 9 and counterweight blocks 10, the supporting plate 9 is coaxially arranged with the free end of the pull rope 3, the supporting plate 9 is fixedly connected with the free end of the pull rope 3, and the plurality of counterweight blocks 10 are stacked on the supporting plate 9 and clamped between adjacent counterweight blocks 10.

[0047] Specifically, the top end surface of the counterweight block 10 is provided with a frustum 1001, the bottom end surface of the counterweight block 10 is provided with a tapered hole 1003 matched with the frustum 1001, a through hole matched with the diameter of the pull rope 3 is coaxially arranged on the frustum 1001, the through hole is communicated with the tapered hole 1003, the top end surface of the supporting plate 9 is fixedly provided with a positioning block 901 matched with the tapered hole 1003, the adjacent counterweight blocks 10 are clamped with each other through the tapered hole 1003 and the frustum 1001, and the tapered hole 1003 of the bottommost counterweight block 10 is clamped with the positioning block 901; the circumferential wall of the counterweight block 10 is further provided with a notch 1002, the notch 1002 is communicated with the tapered hole 1003 and the through hole, the width of the notch 1002 is matched with the diameter of the pull rope 3, and the pull rope 3 enters the through hole and the tapered hole 1003 through the notch 1002; in order to enhance the connection firmness between the counterweight blocks 10, a pair of hoops 11 are further arranged on the pull rope 3, the two hoops 11 are fixedly connected through screws and tightly hold the pull rope 3, the frustum 1001 of the topmost counterweight block 10 abuts against the bottom surface of the hoop 11, and the counterweight blocks 10 are prevented from being separated from each other.

[0048] The counterweight block 10 can be made of the same material as the counterweight of the overhead line of a train.

[0049] In some embodiments, a second sliding rail 102 is vertically fixed on the inner wall of the protective cover 1, and a second dovetail sliding block 902 is fixed on the circumferential wall of the supporting plate 9 and slidably connected with the second sliding rail 102.

[0050] Specifically, the second dovetail sliding block 902 and the second sliding rail 102 are matched with each other to limit the supporting plate 9, thereby enhancing the stability of the supporting plate 9 and preventing the supporting plate 9 from shaking and the counterweight blocks 10 from shaking.

[0051] In some embodiments, the guide assembly comprises two guide wheels 12 and two hanging plates 13, the top ends of the two hanging plates 13 are fixedly connected with the bottom end of the protective cover 1, the two guide wheels 12 are arranged in an up-down manner, the guide wheels 12 are rotatably connected between the two hanging plates 13, and the cable 2 passes between the two guide wheels 12.

[0052] Specifically, the guide wheels 12 are used for guiding the cable 2 to prevent the cable 2 from rubbing against the protective cover 1.

[0053] In some embodiments, one side plate of the protective cover 1 is a detachable movable plate 103.

[0054] Specifically, the guard cover 1 is fixed with a batten 104, and the movable plate 103 is detachably connected with the batten 104 through a bolt; or in the form shown in the drawings, a plurality of round holes are formed in the batten 104, and a rotating pin 14 is rotatably connected in the round hole, one end of the rotating pin 14 is fixed with a stop block 15, and the movable plate 103 is formed with an opening 105 corresponding to the stop block 15 one by one and matched, the rotating pin 14 is arranged corresponding to the lower end of the opening 105, and the stop block 15 is arranged in contact with the outer surface of the movable plate 103. The detachable movable plate 103 facilitates the workers to work in the interior of the guard cover 1. The end of the rotating pin 14 away from the stop block 15 is threadedly connected with a lock block, the lock block is in contact with one side of the batten 104, a baffle is fixed between the stop block 15 and the lock block, the baffle is in contact with the other side of the batten 104, so that the rotating pin 14 is rotatably connected with the round hole of the batten 104. Rotate the stop block 15, when the stop block 15 is aligned with the opening 105, the movable plate 103 can be installed and disassembled.

[0055] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the difference from other embodiments, and the same and similar parts between the various embodiments can be referred to each other, and the various embodiments can be combined with each other. For the device disclosed in the embodiments, since it corresponds to the method disclosed in the embodiments, the description is relatively simple, and the related parts can be referred to the method part.

[0056] The above embodiments only describe the preferred mode of the present application, and do not limit the scope of the present application, and various modifications and improvements of the technical scheme of the present application made by those skilled in the art without departing from the design spirit of the present application shall fall within the protection scope determined by the claims of the present application.

Claims

1. A cable tensioning device, characterized in that, The utility model provides an electric cable protection device, including the protective cover (1), both sides of the bottom end of protective cover (1) are equipped with the guide component for the cable (2) is guided, be equipped with the tensioning assembly in protective cover (1), the tensioning assembly includes pulley block and sets up on pulley block and draws the rope (3), the free end of draw rope (3) hoists and is equipped with counterweight assembly, the bottom end of movable pulley (4) of pulley block is equipped with two rotating wheels (5), two rotating wheels (5) are set up up and down, the cable (2) passes between two rotating wheels (5).

2. A cable tensioning device according to claim 1, characterised in that: The pulley block further includes a first fixed pulley (6) fixedly connected with the top plate of the protective cover (1), one end of the draw rope (3) is fixedly connected with the bottom end of the first fixed pulley (6), and the free end of the draw rope (3) passes through the lower surface of the wheel body of the movable pulley (4) and the upper surface of the wheel body of the first fixed pulley (6) in sequence.

3. A cable tensioning device according to claim 1 or 2, characterised in that: A first sliding rail (101) is vertically fixed on the inner wall of the protective cover (1), and a first dovetail sliding block (401) is fixed on one side of the movable pulley (4) and slidably connected with the first sliding rail (101).

4. The cable tensioning device of claim 2, wherein: The utility model further includes a second fixed pulley (7) and a third fixed pulley (8), the second fixed pulley (7) is fixedly connected with the top plate of the protective cover (1), and the rotation axis of the wheel body of the second fixed pulley (7) is vertically arranged, the third fixed pulley (8) is fixedly connected with the top plate of the protective cover (1), and the rotation axis of the wheel body of the third fixed pulley (8) is horizontally arranged, and the free end of the draw rope (3) is L-shaped, passes through the surface of the wheel body of the second fixed pulley (7) and the surface of the wheel body of the third fixed pulley (8) in sequence, and freely hangs down.

5. A cable tensioning device according to claim 4, characterised in that: The counterweight assembly includes a supporting plate (9) and counterweight blocks (10), the supporting plate (9) is coaxially arranged with the free end of the draw rope (3), and the supporting plate (9) is fixedly connected with the free end of the draw rope (3), a plurality of the counterweight blocks (10) are stacked on the supporting plate (9), and the adjacent counterweight blocks (10) are clamped.

6. A cable tensioning device according to claim 5, characterised in that: A second sliding rail (102) is vertically fixed on the inner wall of the protective cover (1), and a second dovetail sliding block (902) is fixed on the circumferential wall of the supporting plate (9) and slidably connected with the second sliding rail (102).

7. The cable tensioning device of claim 1, wherein: The guide assembly includes two guide wheels (12) and two hanging plates (13), the top ends of the two hanging plates (13) are fixedly connected with the bottom end of the protective cover (1), the two guide wheels (12) are arranged up and down, the guide wheels (12) are rotatably connected between the two hanging plates (13), and the cable (2) passes between the two guide wheels (12).

8. The cable tensioning device of claim 1, wherein: One side plate of the protective cover (1) is a detachable movable plate (103).

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