Hoisting tool for overhead line

Abstract

The invention discloses a hoisting tool for an overhead line, and belongs to the technical field of hoisting equipment. The hoisting tool for the overhead line comprises a supporting frame erected on a power transmission tower, a winding device is arranged on the supporting frame, the supporting frame comprises two bottom longitudinal rods and a bottom transverse rod, the two bottom longitudinal rods and the bottom transverse rod are fixedly connected together in a square frame shape, the bottom longitudinal rods are arranged in the extending direction of an electric wire, and the winding device is arranged on the supporting frame. The power transmission tower comprises a plurality of vertical beams and cross beams which are arranged at intervals, the vertical beams and the cross beams are fixedly connected, the supporting frame is located in the middle of the top of the power transmission tower, and the two bottom longitudinal rods are located above the two flush bottom cross rods and located on the outer sides of the two vertical beams. The supporting frame is erected on the power transmission tower through the bottom longitudinal rods and the bottom transverse rods. The insulator hoisting device has the advantages of high practicability, high safety and capability of improving the insulator hoisting efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of hoisting equipment, in particular to a hoisting tool for overhead lines. Background Art

[0002] By installing insulating tower heads on distribution lines, the insulation level of overhead lines in distribution networks can be improved, effectively avoiding accidents such as line tripping, insulator flashover, and insulated conductor breakage under lightning induced overvoltage, and improving the reliability of line operation. Although the insulating tower head has a simple structure, it is heavy and requires special tools to install it on the pole. If the pole is set up on flat ground with good traffic conditions, it can be installed with large-scale mechanical automation equipment; if the pole is set up in mountainous areas, farmland and other places with inconvenient transportation, large-scale mechanical automation equipment is useless.

[0003] In the prior art, patent documents with announcement numbers CN208150851U, CN220098354U, and CN214141314U all provide a lifting tool for overhead lines. However, these solutions are generally of general practicality. For example, in the solution with announcement number CN208150851U, it is necessary to first install the support plate on the pole. However, there is a lack of lifting tools for installing insulators, so it is more difficult to first install the support plate. In the solution with announcement number CN220098354U, the winch device is mainly installed on the piston rod during use. However, the high-voltage and ultra-high-voltage transmission towers, in which insulators are widely used, are often tens of meters above the ground. This solution is only applicable to the installation environment of smaller insulators on ordinary poles.

[0004] In this regard, we propose a hoisting tool for overhead lines that can be used in the installation process of insulators of high-voltage and ultra-high-voltage transmission towers. Summary of the invention

[0005] The purpose of the present invention is to solve the problem that the prior art hoisting tools have poor practicability when installing insulators, and to propose a hoisting tool for overhead lines.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A hoisting tool for overhead lines, comprising a support frame built on a transmission tower, the support frame being provided with a hoisting device, the support frame comprising two bottom longitudinal bars and a bottom cross bar, the two bottom longitudinal bars and the bottom cross bar being fixedly connected together in a square frame shape, and the bottom longitudinal bars being provided along the extension direction of the electric wire; The transmission tower includes a plurality of vertical beams and horizontal beams arranged at intervals, the vertical beams and the horizontal beams are fixedly connected, the support frame is located in the middle of the top of the transmission tower, the two bottom longitudinal bars are located above two flush bottom horizontal bars and are located on the outside of the two vertical beams, and the support frame is built on the transmission tower through the bottom longitudinal bars and the bottom horizontal bars.

[0007] Further, the bottom longitudinal rod comprises a first longitudinal rod and a second longitudinal rod arranged side by side, and an independent pulley is installed on the first longitudinal rod; The hoisting device comprises a suspension rope which is wound around an independent pulley.

[0008] Furthermore, a vertical rod is provided on the bottom cross bar, an oblique rod is provided on the bottom longitudinal rod, and the tops of the vertical rod and the oblique rod are connected via a top cross bar; An end longitudinal rod is arranged at one end of the top cross bar away from the vertical rod, and a second pulley block is installed on the end longitudinal rod. The second pulley block is located above the outermost insulator installation position and away from the side of the transmission tower.

[0009] Furthermore, hand winches are provided at both ends of the bottom longitudinal rod.

[0010] Furthermore, there are four vertical rods, which are evenly distributed on the two bottom cross rods, and the two vertical rods flush with each other are fixedly connected by a top longitudinal rod.

[0011] Furthermore, a first pulley block is installed on the two top longitudinal rods, and the hoisting device includes a suspension rope. After passing through the first pulley block, the suspension rope goes downward from the second pulley block to suspend the insulator.

[0012] Furthermore, the first pulley set and the second pulley set each include two independent pulleys, the grooves of the two independent pulleys are aligned, and the two independent pulleys are fitted together.

[0013] Furthermore, the sling rope comprises a synthetic fiber sling rope and a metal sling rope, and the diameter of the synthetic fiber sling rope is smaller than the diameter of the metal sling rope.

[0014] Furthermore, the vertical rod and the diagonal rod each include a rod body, a semicircular hoop, and a semicircular fastener. A semicircular fastener corresponding to the semicircular hoop is provided at the bottom of the rod body. The vertical rod and the bottom cross bar are abutted against each other through the semicircular hoop and the semicircular fastener.

[0015] Furthermore, the bottom longitudinal rod, the bottom cross rod, the vertical beam and the cross beam are detachably connected via connectors, and the connectors include cross double U fasteners and cross sleeve fasteners.

[0016] Compared with the prior art, the present invention provides a hoisting tool for overhead lines, which has the following beneficial effects: When the overhead line hoisting tool of the present invention is used, the bottom longitudinal rod is first brought to the top of the transmission tower manually, and then the hoisting rope of the hoisting device is placed on the bottom longitudinal rod. Then, the hoisting device is used to hoist the remaining materials used for building the hoisting tool to the top of the transmission tower. The operator builds the device on the top of the transmission tower and hoists the insulators on both sides of the transmission tower from the middle of the transmission tower. After the hoisting is completed, the tool can be dismantled. The tool is highly practical and suitable for high-altitude operation environments of high-voltage and ultra-high-voltage transmission towers with poor traffic.

[0017] Other advantages, objectives and features of the present invention will be described in part in the following description; and in part, will be apparent to those skilled in the art based on an examination of the following; or, may be taught from the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement of part A; Figure 3 It is a schematic diagram of the support frame structure of the present invention; Figure 4 For the present invention Figure 3 A schematic diagram of the structure of part B in the middle is enlarged; Figure 5 It is a schematic diagram of the independent pulley structure of the present invention; Figure 6 It is a three-dimensional schematic diagram of the vertical rod and the diagonal rod structure of the present invention; Figure 7 For the present invention Figure 6 The enlarged schematic diagram of the structure of part C in the middle; Figure 8 It is a front view schematic diagram of the vertical rod and the diagonal rod structure of the present invention; Fig. 9 For the present invention Figure 8 Enlarged schematic diagram of the structure of part D in the middle Fig.10 A schematic diagram of the connector structure of the present invention; Fig.11 The figure is a schematic diagram of the structure of a transmission tower in the prior art.

[0019] In the figure: 1. Support frame; 11. Bottom longitudinal rod; 111. First longitudinal rod; 112. Second longitudinal rod; 12. Bottom cross rod; 13. Vertical rod; 131. Rod body; 132. Semicircular clamp; 133. Semicircular fastener; 14. Diagonal rod; 15. Top cross rod; 16. End longitudinal rod; 161. Third longitudinal rod; 162. Fourth longitudinal rod; 17. Top longitudinal rod; 2. Hoisting device; 21. Lifting rope; 22. Hoist; 23. First pulley block; 24. Second pulley block; 25. Independent pulley; 3. Hand chain hoist; 4. Transmission tower; 41. Vertical beam; 42. Cross beam; 5. Connector; 51. Cross double U fastener; 52. Cross sleeve fastener; 53. Tightening bolt. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1-11 The overhead line hoisting tool of the present invention comprises a support frame 1 built on a transmission tower 4, a hoisting device 2 is installed on the support frame 1, the support frame 1 comprises two bottom longitudinal bars 11 and a bottom cross bar 12, the two bottom longitudinal bars 11 and the bottom cross bar 12 are fixedly connected together in a square frame shape, and the bottom longitudinal bar 11 is arranged along the extension direction of the wire; In the existing overhead lines, most of the high-voltage and ultra-high-voltage transmission towers 4 are truss structures, and the wires are often distributed in a symmetrical structure on both sides of the transmission tower 4. When the transmission tower 4 is built in mountainous areas or outdoors with inconvenient transportation, only small vehicles can pass through. Therefore, especially for high-voltage and ultra-high-voltage transmission towers that are tens of meters high, traditional large-scale lifting equipment can no longer play a role in installing insulators.

[0022] The solution of the present application mainly relies on the truss structure characteristics of the transmission tower 4 itself, and adopts a temporary construction method to build the lifting tool to meet the installation needs.

[0023] like Fig.11 As shown, the installation position of the tool on the transmission tower 4 is Fig.11 In the figure, the left side is a right view of the transmission tower 4, and the right side is a front view of the transmission tower 4. The direction in which the wires of the transmission tower 4 extend is the front-to-back direction. The tool is installed near the middle position in the left-right direction of the top of the transmission tower 4.

[0024] The transmission tower 4 includes a plurality of vertical beams 41 and horizontal beams 42 installed at intervals, the vertical beams 41 and the horizontal beams 42 are fixedly connected, the support frame 1 is located in the middle of the top of the transmission tower 4, the two bottom longitudinal bars 11 are located above two flush bottom horizontal bars 12, and are located on the outside of two adjacent or non-adjacent vertical beams 41, and the support frame 1 is built on the transmission tower 4 through the bottom longitudinal bars 11 and the bottom horizontal bars 12.

[0025] The vertical beam 41 and the horizontal beam 42 are connected by welding or riveting, and the two bottom longitudinal bars 11 are installed on the outside of the two vertical beams 41, which can effectively prevent the two bottom longitudinal bars 11 from approaching each other due to external forces during use. In the vertical direction, the two bottom longitudinal bars 11 are supported by the horizontal beam 42, and the two bottom cross bars 12 are mainly supported by the bottom longitudinal bars 11 in the vertical direction. The function of the bottom cross bar 12 is that its position on the bottom longitudinal bar 11 is adjustable. During on-site installation, according to the characteristics of the truss structure in the transmission tower 4, it is necessary to avoid interference between other structures in the tool and the truss. By adjusting the specific position on the bottom cross bar 12, the interference that may be caused by the truss structure can be avoided, so that the tool can be smoothly built on the transmission tower 4.

[0026] The bottom longitudinal rod 11 includes a first longitudinal rod 111 and a second longitudinal rod 112 installed side by side, and an independent pulley 25 is installed on the first longitudinal rod 111; The hoisting device 2 includes a hoisting rope 21 and a hoisting machine 22. The hoisting machine 22 is driven by a gasoline generator. The hoisting rope 21 is wound around an independent pulley 25. In the early stage of construction, the second longitudinal rod 112 and the independent pulley 25 are manually brought to the top of the transmission tower 4. After being fixed to the transmission tower 4 using the connecting piece 5, the hoisting rope 21 is passed around the independent pulley 25 for hoisting the materials needed in the early stage of construction, thereby improving the material transportation efficiency and reducing the construction time.

[0027] A vertical rod 13 is installed on the bottom cross bar 12, and an oblique rod 14 is arranged on the bottom longitudinal rod 11. The tops of the vertical rod 13 and the oblique rod 14 are connected by a top cross bar 15, that is, the vertical rod 13, the oblique rod 14, and the top cross bar 15 form a triangular frame structure; An end longitudinal rod 16 is installed at one end of the top crossbar 15 away from the vertical rod 13 , and a second pulley block 24 is installed on the end longitudinal rod 16 . The second pulley block 24 is located above the outermost insulator installation position and away from the side of the transmission tower 4 .

[0028] The end longitudinal rod 16 includes a third longitudinal rod 161 and a fourth longitudinal rod 162. The diagonal rod 14, the top cross bar 15, the third longitudinal rod 161 and the fourth longitudinal rod 162 are fixedly connected to each other through a connecting member 5. The two independent pulleys 25 in the second pulley group 24 are respectively installed on the third longitudinal rod 161 and the fourth longitudinal rod 162.

[0029] Hand chain hoists 3 are installed at both ends of the bottom longitudinal rod 11. The hand chain hoists 3 are detachably installed on the bottom longitudinal rod 11 through the connecting piece 5. When the hoisting device 2 is used to lift the insulator, firstly, it cannot completely correspond to the installation position of the insulator during lifting, and there will be deviations ranging from several centimeters to tens of centimeters; secondly, the weight of the insulator ranges from hundreds of kilograms to thousands of kilograms. When there is a deviation, it is very difficult and dangerous to adjust it manually. In view of this, when using this tool to lift the insulator, when the insulator is lifted to the vicinity of the installation position, two hand chain hoists 3 are used from such as Fig.11 Pull the rope 21 for hoisting the insulator in the front-back direction as shown, and when the hand chain hoist 3 is tightened, the insulator is simultaneously Fig.11 As shown, the front-to-back and left-to-right directions are displaced, so that the horizontal position of the insulator can be accurately adjusted, which greatly improves the adjustment efficiency and avoids the operational risks of manually pulling the suspension rope 21.

[0030] There are four vertical rods 13 , which are evenly distributed on the two bottom cross bars 12 , and two vertical rods 13 flush with each other are fixedly connected by a top longitudinal rod 17 .

[0031] The four vertical rods 13 are distributed according to the rectangular frame structure to improve the stabilization effect.

[0032] A first pulley block 23 is installed on the two top longitudinal rods 17. The hoisting device 2 includes a suspension rope 21. After passing through the first pulley block 23, the suspension rope 21 goes downward from the second pulley block 24 to suspend the insulator.

[0033] In the present application, the top longitudinal rod 17 is closer to the middle position of the transmission tower 4 than the end longitudinal rod 16. The hoisting device 2 hoists the insulator by going around from the first pulley group 23 and going out from the second pulley group 24. During the hoisting process, the main force distribution of the device is closer to the middle position of the transmission tower 4. For the transmission tower 4 and the tool, the force is more balanced and reasonable.

[0034] The first pulley block 23 and the second pulley block 24 each include two independent pulleys 25 , the grooves of the two independent pulleys 25 are aligned, and the two independent pulleys 25 fit together.

[0035] The function of the first pulley group 23 and the second pulley group 24 is to bypass the lifting rope 21. The two independent pulleys 25 are fitted together, which can effectively prevent the lifting rope 21 from being separated from the groove of the independent pulley 25 when subjected to the oblique pulling force from the hand winch 3, thereby realizing the device to pull the insulator obliquely during the lifting process.

[0036] The lifting rope 21 includes a synthetic fiber lifting rope and a metal lifting rope, both of which are equipped with hooks. The diameter of the synthetic fiber lifting rope is smaller than that of the metal lifting rope. Specifically, two winches 22 can be selected to use the synthetic fiber lifting rope and the metal lifting rope respectively. The synthetic fiber lifting rope is an ordinary lifting rope, which is wound around an independent pulley 25 for use and is used for the early stage of lifting the construction materials of this tool. The synthetic fiber lifting rope has the characteristics of soft material. During the construction process, it is convenient to manually drag and pull the synthetic fiber lifting rope. It should be noted that the synthetic fiber lifting rope is also manually brought to the top of the transmission tower 4 in the early stage.

[0037] The metal lifting rope mainly refers to the steel wire lifting rope, which has high strength and large lifting weight, and can meet the lifting requirements of the insulator. The metal lifting rope is hoisted to the top of the transmission tower 4 by the synthetic fiber lifting rope in the later stage of construction.

[0038] The vertical rod 13 and the oblique rod 14 each include a rod body 131, a semicircular hoop 132, and a semicircular fastener 133. A semicircular fastener 133 corresponding to the semicircular hoop 132 is welded to the bottom of the rod body 131. The vertical rod 13 is abutted against the bottom cross bar 12 through the semicircular hoop 132 and the semicircular fastener 133. Figure 6-9 As shown, the vertical rod 13 is installed on the bottom cross bar 12 through the semicircular clamp 132 and the semicircular fastener 133, and the diagonal rod 14 is installed on the bottom longitudinal rod 11 through the semicircular clamp 132 and the semicircular fastener 133. During the lifting process, the vertical rod 13 mainly exerts a downward force on the bottom cross bar 12, and the diagonal rod 14 exerts a downward oblique force on the bottom longitudinal rod 11. Therefore, the semicircular clamp 132 and the semicircular fastener 133 can connect them stably together to avoid slipping.

[0039] The bottom longitudinal rod 11, the bottom cross rod 12 and the vertical beam 41, the cross beam 42 are detachably connected through the connecting piece 5, and the connecting piece 5 includes a cross double U fastener 51 and a cross sleeve fastener 52. A tightening bolt 53 is also installed on the cross sleeve fastener 52. The cross double U fastener 51 is mainly used to connect the middle part of pipe fittings and rods, and the cross sleeve fastener 52 is used to connect the ends of pipe fittings and rods. The tightening bolt 53 runs through the side wall of the cross sleeve fastener 52 to tighten the surface of the pipe fittings and rods to make the connection more stable.

[0040] Working principle: When in use, first manually bring the second longitudinal rod 112, the independent pulley 25, the synthetic fiber suspension rope and several connecting parts 5 to the top of the transmission tower 4, install the independent pulley 25 on the second longitudinal rod 112, fix the second longitudinal rod 112 on the transmission tower 4, and then pass the synthetic fiber suspension rope around the independent pulley 25 to lift the remaining materials needed for construction.

[0041] During the construction process, the metal rope is lifted up with a synthetic fiber rope, and after the metal rope is passed around an independent pulley 25 in the first pulley block 23 or the second pulley block 24, another independent pulley 25 is built to form a complete first pulley block 23 or the second pulley block 24, and the winding operation of the metal rope is completed at the same time, that is, the construction work is completed.

[0042] Then start the winch 22, lift the insulator with the metal rope, and hoist the insulator to the vicinity of the corresponding installation position. Then use the hook of the hand winch 3 to hook the part of the metal rope below the second pulley block 24 and above the insulator. Adjust the horizontal position of the insulator with the hand winch 3 so that the insulator is aligned with the installation position in the horizontal direction. Then control the winch 22 to slowly loosen the insulator, so that the insulator is installed in place.

[0043] According to this method, one side of the transmission tower 4 (such as Fig.11 After the installation of the insulator on the left or right side (as shown in the figure) is completed, remove the bottom longitudinal rod 11, the bottom cross bar 12, and the parts other than the independent pulley 25 of the tool, and rebuild the tool so that the second pulley block 24 is located above and outside the insulator installation position on the other side until the insulators on the entire transmission tower 4 are installed.

[0044] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

[0045] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0046] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention.

Claims

1. A hoisting tool for an overhead line, comprising a support frame (1) erected on a transmission tower (4), wherein a hoisting device (2) is arranged on the support frame (1), characterized in that: The support frame (1) comprises two bottom longitudinal bars (11) and a bottom cross bar (12), the two bottom longitudinal bars (11) and the bottom cross bar (12) being fixedly connected together in a square frame shape, and the bottom longitudinal bars (11) are arranged along the extension direction of the electric wire; The transmission tower (4) comprises a plurality of vertical beams (41) and horizontal beams (42) arranged at intervals, the vertical beams (41) and the horizontal beams (42) being fixedly connected, the support frame (1) being located in the middle of the top of the transmission tower (4), the two bottom longitudinal bars (11) being located above two flush bottom horizontal bars (12) and outside the two vertical beams (41), and the support frame (1) being built on the transmission tower (4) via the bottom longitudinal bars (11) and the bottom horizontal bars (12).

2. The overhead line hoisting tool according to claim 1, characterized in that: The bottom longitudinal rod (11) comprises a first longitudinal rod (111) and a second longitudinal rod (112) arranged side by side, and an independent pulley (25) is mounted on the first longitudinal rod (111); The hoisting device (2) comprises a suspension rope (21), wherein the suspension rope (21) is wound around an independent pulley (25).

3. The overhead line hoisting tool according to claim 1, characterized in that: A vertical rod (13) is arranged on the bottom cross rod (12), an oblique rod (14) is arranged on the bottom longitudinal rod (11), and the tops of the vertical rod (13) and the oblique rod (14) are connected via a top cross rod (15); An end longitudinal rod (16) is provided at one end of the top crossbar (15) away from the vertical rod (13), and a second pulley block (24) is mounted on the end longitudinal rod (16). The second pulley block (24) is located above the outermost insulator installation position and away from the side of the transmission tower (4).

4. The overhead line hoisting tool according to claim 3, characterized in that: Hand chain hoists (3) are provided at both ends of the bottom longitudinal rod (11).

5. The overhead line hoisting tool according to claim 3, characterized in that: There are four vertical rods (13), which are evenly distributed on the two bottom cross rods (12), and the two vertical rods (13) flush with each other are fixedly connected via a top longitudinal rod (17).

6. The overhead line hoisting tool according to claim 5, characterized in that: A first pulley block (23) is installed on the two top longitudinal rods (17), and the hoisting device (2) comprises a suspension rope (21). After passing through the first pulley block (23), the suspension rope (21) goes downward from the second pulley block (24) to suspend the insulator.

7. The overhead line hoisting tool according to claim 6, characterized in that: The first pulley group (23) and the second pulley group (24) each comprise two independent pulleys (25), the grooves of the two independent pulleys (25) are aligned, and the two independent pulleys (25) are fitted together.

8. The overhead line hoisting tool according to claim 6, characterized in that: The sling rope (21) comprises a synthetic fiber sling rope and a metal sling rope, and the diameter of the synthetic fiber sling rope is smaller than the diameter of the metal sling rope.

9. The overhead line hoisting tool according to claim 3, characterized in that: The vertical rod (13) and the oblique rod (14) both comprise a rod body (131), a semicircular hoop (132), and a semicircular fastener (133); a semicircular fastener (133) corresponding to the semicircular hoop (132) is provided at the bottom of the rod body (131); the vertical rod (13) and the bottom crossbar (12) are abutted against each other via the semicircular hoop (132) and the semicircular fastener (133).

10. The overhead line hoisting tool according to claim 1, characterized in that: The bottom longitudinal rod (11), the bottom cross rod (12), the vertical beam (41), and the cross beam (42) are detachably connected via a connecting piece (5), and the connecting piece (5) comprises a cross double U fastener (51) and a cross sleeve fastener (52).

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