A power line stringing and tightening device

Abstract

The utility model provides a kind of electric power line stringing tightening device, including movable pulley, both sides of the movable pulley are equipped with connecting frame, first hook is equipped in movable pulley lower side, the first hook is rotatably installed between two connecting frames, the lower side of the first hook is equipped with multiple counterweight arranged up and down, the counterweight upper surface middle position is installed with ring, the counterweight lower surface middle position is installed with second hook, the counterweight upper surface is concave and forms annular groove downward, annular hollow box is installed in annular groove, straight pipe is installed on the upper surface of hollow box, the upper end of straight pipe is screw-connected with screw cap, the utility model has the beneficial effects as follows: the weight of counterweight is increased according to need, it is convenient to use in the use environment of smaller height, without producing different specifications of counterweight, it is convenient to manage.

Description

Technical Field

[0001] This utility model is a power line stringing and tightening device, belonging to the field of power. Background Technology

[0002] In power line tensioning operations, pulley systems can be installed on the conductors, utilizing the labor-saving characteristics of the pulley systems and the gravity traction of counterweights to achieve conductor tensioning. Specifically, the pulley system (usually composed of fixed and movable pulleys) is first placed on the conductor to be tightened. Multiple counterweights connected in series are connected to the lower end of the movable pulley. When the counterweights move downwards under gravity, they apply tension to the movable pulleys, thus pulling the conductor downwards and generating tension. During this process, the number of counterweights can be adjusted according to the required tension, while simultaneously observing the sag observation point until the conductor sag reaches the design value. This method utilizes automatic gravity loading, requiring no external power equipment. Actual measurement data shows that when using this method to tighten conductors, the tension control error is ≤±3%, and multiple conductors can be tightened simultaneously, increasing efficiency by 2-3 times compared to traditional manual tensioning. Currently, the weight of a single type of counterweight is fixed. When the distance between the movable pulley and the ground is small, the weight generated by the number of counterweights suspended on the movable pulley may not meet the tension requirements of the conductor. Using counterweights of different weights will result in different specifications of counterweights, which is inconvenient for management. Utility Model Content

[0003] In view of the shortcomings of the existing technology, the purpose of this utility model is to provide a power line stringing tightening device to solve the problems mentioned in the background technology. This utility model realizes the ability to increase the weight of the counterweight as needed, which is convenient for use in environments with low height, eliminates the need to produce counterweights of different specifications, and facilitates management.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a power line tensioning device includes a movable pulley, with connecting frames on both sides of the movable pulley. The movable pulley is rotatably connected to the connecting frames. A first hook is provided on the lower side of the movable pulley, and the first hook is rotatably installed between the two connecting frames. Multiple counterweights are arranged vertically on the lower side of the first hook. A hanging ring is installed at the center of the upper surface of each counterweight, and the hanging ring on the uppermost counterweight is hooked to the first hook. A second hook is installed at the center of the lower surface of each counterweight, and the hanging ring on the lower counterweight is hooked to the second hook on the upper counterweight. The upper surface of each counterweight is recessed downward to form an annular groove. An annular hollow box is installed inside the annular groove. A straight tube is installed on the upper surface of the hollow box, and a threaded cap is threaded to the upper end of the straight tube.

[0005] Furthermore, the counterweight has a circular cross-section, and a vertically arranged arc-shaped plate is provided on one side of the counterweight. The arc-shaped plate slides in contact with the annular side of the counterweight. An insertion groove is provided in the area of ​​the counterweight covered by the arc-shaped plate, and an insertion strip is inserted into the insertion groove. The insertion strip is connected and fixed to the arc-shaped plate. Connecting seats are installed at both ends of the arc-shaped plate, and the connecting seats on one arc-shaped plate are connected to the connecting seats on the other arc-shaped plate by multiple sets of bolts.

[0006] Furthermore, a baffle plate is installed at the upper end of the uppermost arc-shaped plate, and the end of the baffle plate away from the arc-shaped plate slides in contact with the side of the connecting frame opposite to the movable pulley.

[0007] Furthermore, an ear plate is fixedly connected to the end of the blocking plate away from the arc-shaped plate, and the ear plate slides in contact with the side of the connecting frame opposite to the movable pulley.

[0008] Furthermore, the cross-section of the connector strip is "T" shaped, and the cross-section of the connector groove is "T" shaped.

[0009] Furthermore, a connecting rod is installed at the center of the upper surface of the counterweight, and the end of the connecting rod away from the counterweight is connected and fixed to the hanging ring.

[0010] Furthermore, the lower surface of the counterweight is recessed upward to form a blind hole, and the upper end of the second hook is installed in the blind hole.

[0011] The beneficial effects of this utility model are:

[0012] 1. A hollow box is installed in the annular groove on the upper surface of the counterweight. By injecting sand, gravel, or other fillers into the hollow box, the weight of a single counterweight can be increased from the base value to the required weight value. There is no need to replace counterweights of different specifications. The tension requirement can be met simply by adjusting the filling amount. This solves the problem of insufficient counterweight quantity in small spaces and allows for increasing the weight of counterweights as needed. It is convenient for use in environments with low heights and does not require the production of counterweights of different specifications, making management easier.

[0013] 2. Connect two adjacent arc-shaped plates to each other, and then restrict the position of the structure formed by multiple arc-shaped plates. Insert the connector strip into the connector slot, and then the connector strip and the connector slot cooperate to restrict the movement trajectory of the counterweight. This prevents the counterweight from swinging in windy weather and causing the wire on the movable pulley to twist due to the swing, thus protecting the wire. The blocking plate and the connecting frame cooperate to prevent the movable pulley from swinging due to wind force in windy weather. Attached Figure Description

[0014] Other features, objects, and advantages of this invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the structure of a power line stringing and tightening device according to the present invention;

[0016] Figure 2 This is a perspective view of a power line stringing and tightening device according to the present invention.

[0017] Figure 3 This is a schematic diagram of the assembly of the hanging ring and the counterweight in a power line stringing and tightening device according to the present invention.

[0018] Figure 4 This is a schematic diagram of the assembly of the straight pipe and the hollow box in a power line overhead tensioning device of this utility model.

[0019] Figure 5 This is a schematic diagram of the assembly of the connector strip and the arc plate in a power line stringing and tightening device of this utility model;

[0020] In the diagram: 1-movable pulley, 2-connecting frame, 3-first hook, 4-hanging ring, 5-threaded cap, 6-connecting rod, 7-hollow box, 8-second hook, 9-counterweight, 10-insertion strip, 11-arc plate, 12-blocking plate, 13-ear plate, 14-connecting seat, 15-insertion groove, 16-annular groove, 17-straight pipe. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] Please see Figures 1-3 This utility model provides a technical solution: a power line tensioning device, including a movable pulley 1, with connecting frames 2 on both sides of the movable pulley 1, the movable pulley 1 being rotatably connected to the connecting frames 2, a first hook 3 on the lower side of the movable pulley 1, the first hook 3 being rotatably installed between the two connecting frames 2, a plurality of vertically arranged counterweights 9 on the lower side of the first hook 3, a hanging ring 4 installed at the center of the upper surface of the counterweight 9, wherein a connecting rod 6 is installed at the center of the upper surface of the counterweight 9, the connecting rod 6 being away from the counterweight 9. One end of the counterweight 9 is fixedly connected to the hanging ring 4. The hanging ring 4 on the uppermost counterweight 9 is hooked to the first hook 3. A second hook 8 is installed at the middle of the lower surface of the counterweight 9. The lower surface of the counterweight 9 is concave upward to form a blind hole. The upper end of the second hook 8 is installed in the blind hole. The hanging ring 4 on the lower counterweight 9 is hooked to the second hook 8 on the upper counterweight 9. When the counterweight 9 moves downward under the action of gravity, it applies a pulling force to the movable pulley 1, thereby driving the conductor to move downward and generating tension in the conductor. During this process, the number of counterweights 9 can be adjusted according to the required tension. At the same time, the sag observation point is observed until the conductor sag reaches the design value, thus achieving the tightening of the power line.

[0023] See Figures 1-4 The upper surface of the counterweight 9 is recessed to form an annular groove 16. A ring-shaped hollow box 7 is installed within the annular groove 16. A straight tube 17 is installed on the upper surface of the hollow box 7, and a threaded cap 5 is threaded to the upper end of the straight tube 17. By injecting sand, gravel, or other fillers into the hollow box 7, the weight of a single counterweight can be flexibly increased from a base value to the desired value. This design eliminates the need to replace counterweights 9 of different specifications; tension requirements can be met simply by adjusting the filling amount. This effectively solves the problem of insufficient counterweights 9 in small spaces, enabling the function of increasing the weight of counterweights 9 as needed. It is convenient for use in environments with limited height and eliminates the need to produce counterweights 9 of various specifications, simplifying management.

[0024] See Figures 1-5 The counterweight 9 has a circular cross-section. A vertically arranged arc-shaped plate 11 is provided on one side of the counterweight 9. The arc-shaped plate 11 slides in contact with the annular side of the counterweight 9. A T-shaped insertion groove 15 is provided in the area of ​​the counterweight 9 covered by the arc-shaped plate 11. A T-shaped insertion strip 10 is inserted into the insertion groove 15 and is fixedly connected to the arc-shaped plate 11. Connecting seats 14 are installed at both ends of the arc-shaped plate 11. The connecting seats 14 on one arc-shaped plate 11 are connected to the connecting seats 14 on the other arc-shaped plate 11 by multiple sets of bolts. The uppermost arc-shaped plate... A baffle plate 12 is installed at the upper end of the 11. The end of the baffle plate 12 away from the arc plate 11 slides in contact with the side of the connecting frame 2 opposite to the movable pulley 1. An ear plate 13 is fixedly connected to the end of the baffle plate 12 away from the arc plate 11. The ear plate 13 slides in contact with the side of the connecting frame 2 opposite to the movable pulley 1. The ear plate 13 increases the contact range between the baffle plate 12 and the connecting frame 2. Two adjacent arc plates 11 are connected and fixed by bolts, so that multiple arc plates 11 are spliced ​​into a ring structure. Through the cooperation of the plug strip 10 and the plug groove 15, the movement trajectory of the counterweight 9 is laterally constrained. This structure can effectively resist the lateral swing of the counterweight 9 in windy weather, and prevent the wire on the movable pulley 1 from generating torsional stress due to the shaking of the counterweight 9, thereby protecting the wire from mechanical damage. At the same time, the sliding contact between the baffle plate 12 and the side of the connecting frame 2 further limits the swing range of the movable pulley 1 and enhances the stability of the entire tightening device in severe weather.

[0025] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A power line tensioning device, comprising a movable pulley (1), characterized in that: Both sides of the movable pulley (1) are provided with connecting frames (2), and the movable pulley (1) is rotatably connected to the connecting frames (2). The lower side of the movable pulley (1) is provided with a first hook (3), which is rotatably installed between the two connecting frames (2). The lower side of the first hook (3) is provided with multiple counterweights (9) arranged vertically. A hanging ring (4) is installed at the middle position of the upper surface of the counterweight (9). The hanging ring (4) on the uppermost counterweight (9) is connected to the first hook (2). 3) Hooking: A second hook (8) is installed at the middle of the lower surface of the counterweight (9). The hanging ring (4) on the lower counterweight (9) is hooked to the second hook (8) on the upper counterweight (9). The upper surface of the counterweight (9) is recessed downward to form an annular groove (16). An annular hollow box (7) is installed in the annular groove (16). A straight tube (17) is installed on the upper surface of the hollow box (7). A threaded cap (5) is threaded to the upper end of the straight tube (17).

2. The power line stringing tightening device according to claim 1, characterized in that: The counterweight (9) has a circular cross-section. A vertically arranged arc plate (11) is provided on one side of the counterweight (9). The arc plate (11) slides in contact with the annular side of the counterweight (9). A plug groove (15) is provided in the area of ​​the counterweight (9) covered by the arc plate (11). A plug strip (10) is inserted in the plug groove (15). The plug strip (10) is connected and fixed to the arc plate (11). A connecting seat (14) is installed at both ends of the arc plate (11). The connecting seat (14) on one arc plate (11) is connected to the connecting seat (14) on the other arc plate (11) by multiple sets of bolts.

3. The power line stringing tightening device according to claim 2, characterized in that: A baffle plate (12) is installed on the upper end of the uppermost arc plate (11). The end of the baffle plate (12) away from the arc plate (11) slides in contact with the side of the connecting frame (2) away from the movable pulley (1).

4. The power line stringing tightening device according to claim 3, characterized in that: The end of the baffle plate (12) away from the arc plate (11) is connected and fixed with an ear plate (13), and the ear plate (13) slides in contact with the side of the connecting frame (2) away from the movable pulley (1).

5. A power line stringing tightening device according to claim 2, characterized in that: The cross-section of the connector strip (10) is "T" shaped, and the cross-section of the connector groove (15) is "T" shaped.

6. The power line stringing tightening device according to claim 1, characterized in that: A connecting rod (6) is installed at the middle of the upper surface of the counterweight (9), and the end of the connecting rod (6) away from the counterweight (9) is connected and fixed to the hanging ring (4).

7. The power line stringing tightening device according to claim 1, characterized in that: The lower surface of the counterweight (9) is recessed upward to form a blind hole, and the upper end of the second hook (8) is installed in the blind hole.

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