Self-locking hook

Abstract

The invention provides a self-locking hook which comprises a hook body, a clamping piece hinged to the hook body and a locking device connected with the hook body and the clamping piece respectively, the hook body and the clamping piece are provided with a first clamping part and a second clamping part respectively, and the locking device connected with a pull rope drives the clamping piece to rotate around a hinge shaft. The first clamping part and the second clamping part form a closed space to clamp the wire, and meanwhile, the clamping piece is limited; according to the self-locking hook, the wire can be automatically clamped between the hook body and the clamping piece, and the self-locking hook is simple in structure, convenient to operate and capable of being widely applied to various emergency disposal scenes of power transmission lines.

Description

Technical Field

[0001] The invention relates to the technical field of power grid disaster prevention, and in particular to a self-locking hook. Background Art

[0002] With the rapid development of the economy, the demand for electricity continues to rise, and the scale of the power grid has expanded rapidly, especially the construction and operation of ultra-high voltage transmission lines. The structure and scale of the power grid are becoming increasingly complex. For areas with vast territories and complex and changeable geographical and meteorological conditions, the power grid is easily affected by ice and snow and strong winds in winter, causing meteorological disasters. In addition, with climate change in recent years, severe weather has occurred frequently, which has greatly increased the probability and degree of meteorological disasters suffered by the power grid. Among the meteorological disasters in the power grid, large-scale oscillations of overhead wires such as ice dancing, wind deviation and ice shedding jumping are forms of disasters with high frequency, wide impact range and large losses. Long-term large-scale oscillations can easily cause fatigue damage to wires, hardware, poles, towers and foundations. The commonly used wire clamp rotary spacers, double-swing anti-dancing devices, etc. can only increase the dancing threshold of dancing, and have limited effect on the prevention and control of line dancing under severe ice and wind conditions.

[0003] In order to prevent the harm to the line caused by the large amplitude oscillation of the conductor, a limit adjustment device can be set in the gear. While preventing the large amplitude oscillation of the conductor, it can automatically adjust the sag change caused by temperature change to ensure that when the limit prevention method is used to control the large amplitude oscillation of the conductor, no large additional node force is generated on the conductor, affecting the operating tension of the conductor, and reducing the manual maintenance workload of the line. The perfect transmission line limit prevention technology solution and limit prevention application technology system can improve the safe and stable operation level of the power grid under the swaying disaster.

[0004] At present, the promotion and application of a series of new technologies such as cross-regional and cross-network, long-distance and large-capacity power transmission have put forward higher and stricter requirements for the prevention and control measures of large oscillations in extreme environments of power transmission lines. The limit adjustment device plays an important role in preventing and controlling large oscillations of conductors, and the hook used for tightening and fixing the rope is the key component of the limit adjustment device, while the traditional hinged or pre-twisted wire clamp structure is inconvenient to operate and has a small application range. Summary of the invention

[0005] In order to solve the problems of inconvenient operation and small application range of existing wire fixing devices, the present invention provides a self-locking hook, which includes a hook body, a clamping part hinged to the hook body, and a locking device connected to the hook body and the clamping part respectively; the hook body and the clamping part are respectively provided with a first clamping part and a second clamping part; the locking device is connected to a pull rope, and is used to drive the clamping part to rotate around a hinge axis under the pulling of the pull rope, so that the first clamping part and the second clamping part form a closed space to clamp the wire, and limit the clamping part.

[0006] Preferably, the hook body includes two main boards and a connecting rod located between the two main boards, and both ends of the connecting rod are respectively connected to the two main boards; the main board is a plate-like structure with one end being hooked, and the inner arc surface of the hook-shaped end forms the first clamping portion; the two main boards are arranged in parallel, the two hook-shaped ends are located on the same side, and the clamping piece and the locking device are located between the two main boards; the clamping piece is respectively hinged to the two hook-shaped ends; and the locking device is respectively connected to the two main boards.

[0007] Preferably, the clamping member is a plate-like structure with a concave arc surface on the edge, and the concave arc surface is arranged opposite to the inner arc surface to form the second clamping portion.

[0008] Preferably, the locking device includes a chain locking tooth, a rope drum, a connecting shaft and a stopping device; the chain locking tooth and the turntable are both wheel-shaped, the connecting shaft is rod-shaped, the chain locking tooth and the turntable are sleeved on the connecting shaft, and the two ends of the connecting shaft are respectively connected to the two main boards; the outer circle of the chain locking tooth is provided with wheel teeth, the edge of the clamping part is provided with fan-shaped teeth, and the fan-shaped teeth are meshed and connected with the wheel teeth; the rope drum is connected to the pull rope; one end of the stopping device is connected to the main board, and the other end is used to abut and limit with the chain locking tooth.

[0009] Preferably, the connection method between the chain locking teeth and the rotating disk and the connecting shaft includes a key connection.

[0010] Preferably, the stopping device includes a stopping mechanism, a spring and a rotating part, the stopping mechanism is located between the chain locking teeth and the spring, one end of the stopping mechanism is used to abut against the chain locking teeth, and the other end is pressed against one end of the spring, and the other end of the spring is connected to the main board; the rotating part is connected to the stopping mechanism, and is used to make the stopping mechanism abut against or disengage from the chain locking teeth.

[0011] Preferably, the stopping mechanism includes a plate member and a spherical member, and the spherical member is located between the plate member and the spring; the plate member is plate-shaped, and at least one tooth-like structure is provided on one edge, and the tooth-like structure is used to abut against the tooth groove of the chain locking tooth, and the other side edge of the plate member opposite to the tooth-like structure is provided with a concave structure, and the spherical member is spherical, and the concave structure abuts against one side of the spherical member, and the other side of the spherical member presses against one end of the spring.

[0012] Preferably, a mounting seat is provided on the inner side surface of the mainboard, and the mounting seat is provided with a mounting hole coaxial with the spring, and the other end of the spring is located in the mounting hole.

[0013] Preferably, rubber pads are provided on the inner arc surface and the concave arc surface.

[0014] Preferably, a circle of grooves is provided on the outer circumference of the rope drum, and the pull rope is wound in the grooves.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The present invention provides a self-locking hook, comprising a hook body, a clamping part hinged to the hook body, and a locking device respectively connected to the hook body and the clamping part. The hook body and the clamping part are respectively provided with a first clamping part and a second clamping part. The clamping part is driven to rotate around a hinge axis by the locking device connected to a pull rope, so that the first clamping part and the second clamping part form a closed space to clamp the wire, and at the same time limit the clamping part. The self-locking hook can make the wire automatically clamped between the hook body and the clamping part, has a simple structure, is easy to operate, and can be widely used in various emergency disposal scenarios of power transmission lines. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A three-dimensional diagram of a self-locking hook;

[0018] Figure 2 It is the front view of the self-locking hook;

[0019] Figure 3 It is the left view of the self-locking hook;

[0020] Figure 4 It is the right side view of the self-locking hook;

[0021] Figure 5 A structural diagram of a hook body of a self-locking hook;

[0022] Figure 6 A structural diagram of the main board of the self-locking hook;

[0023] Figure 7 A three-dimensional diagram of a clamping member of a self-locking hook;

[0024] Figure 8 A front view of a clip-on component of a self-locking hook;

[0025] Fig. 9 A structural diagram of the connection between the self-locking hook's card connector and the main board;

[0026] Fig.10 This is the front view of the internal structure of the self-locking hook;

[0027] Fig.11 Left view of the internal structure of the self-locking hook;

[0028] Fig.12 A three-dimensional diagram of the internal structure of a self-locking hook;

[0029] Fig.13Schematic diagram of the wire entering the clamping part during the locking process of the self-locking hook;

[0030] Fig.14 It is a schematic diagram of the beginning of engagement between the clamping member and the chain locking teeth during the locking process of the self-locking hook;

[0031] Fig.15 Schematic diagram of the self-locking hook clamping the wire during the locking process;

[0032] Fig.16 It is a schematic diagram of the wire being clamped during the locking process of the self-locking hook;

[0033] Figure numerals: 1. hook body; 2. snap-fit ​​part; 3. locking device; 4. pull rope; 5. main board; 6. pin shaft; 7. first snap-fit ​​part; 8. second snap-fit ​​part; 9. connecting rod; 10. blocking rod; 11. connecting shaft; 12. chain locking teeth; 13. rope drum; 14. plate; 15. spring; 16. rotating part; 17. mounting seat; 18. spherical part; 19. wire. DETAILED DESCRIPTION

[0034] In order to better understand the present invention, the content of the present invention is further described below in conjunction with the accompanying drawings.

[0035] Embodiment 1:

[0036] This embodiment provides a self-locking hook, such as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the self-locking hook includes a hook body 1, a clamping part 2 hinged to the hook body 1, and a locking device respectively connected to the hook body 1 and the clamping part 2; the hook body 1 and the clamping part 2 are respectively provided with a first clamping part and a second clamping part; the locking device is connected to the pull rope 4, and is used to drive the clamping part 2 to rotate around the hinge axis under the pulling of the pull rope 4, so that the first clamping part and the second clamping part form a closed space to clamp the wire, and limit the clamping part 2.

[0037] The self-locking hook can be tightly hung on the overhead wire and is used as an oscillation limit device for transmission lines and in various emergency response scenarios for transmission lines. It is easy to operate and has a wide range of applications.

[0038] like Figure 5 As shown, the hook body 1 includes two parallel main boards 5 and a connecting rod 9 located between the two main boards 5. The two ends of the connecting rod 9 are respectively connected vertically to the two main boards 5. The two main boards 5 have the same structure, both of which are plate-like structures with one end in a hook shape. The hook-shaped ends of the two main boards 5 are located on the same side, and the connecting rod is arranged on the other side. Figure 6As shown, the inner arc surface of the hook-shaped end of the main board 5 is the first clamping portion 7, which is used to cooperate with the clamping member 2 to clamp the wire 19.

[0039] like Figure 7 and Figure 8 As shown, the clamping member 2 is a plate-like structure with a concave arc surface and sector-shaped teeth on the edge. Fig. 9 As shown, the clip 2 is hinged between the hook ends of the two main boards 5 through the pin 6. The concave arc surface of the clip 2 is arranged opposite to the inner arc surface of the hook end of the main board 5, and the concave arc surface of the clip 2 forms a second clip 8. Therefore, when the clip 2 rotates clockwise around the pin 6 between the two main boards 5, the first clip 7 and the second clip 8 are relatively closed, and the wire 19 is clamped between the first clip 7 and the second clip 8.

[0040] The locking device 3 is arranged between the two main boards 5. Fig.10 , Fig.11 and Fig.12 As shown, the locking device 3 is composed of a chain locking tooth 12, a rope disc 13, a connecting shaft 11 and a stopper, and the stopper includes a plate 14, a spherical member 18, a spring 15 and a rotating member 16, which is used to stop and limit the chain locking tooth 12. The chain locking tooth 12 and the rotating disc 13 are both wheel-shaped, and the connecting shaft 11 is rod-shaped. The chain locking tooth 12 and the rotating disc 13 are sleeved on the connecting shaft 11, and the two ends of the connecting shaft 11 are respectively connected to the two main boards 5. The connection mode of the connecting shaft 11 and the chain locking tooth 12 and the rotating disc 13 is a key connection, or the cross section of the connecting shaft is designed to be rectangular, and a rectangular hole matching the connecting shaft 11 is opened in the axial direction of the chain locking tooth 12 and the rotating disc 13, so that the connecting shaft 11, the chain locking tooth 12 and the rotating disc 13 rotate simultaneously under the action of the pull rope 4.

[0041] The outer circle of the chain locking teeth 12 is provided with gear teeth, and the edge of the clip 2 is provided with fan-shaped teeth, which are meshed and connected with the gear teeth; a circle of grooves is provided on the outer circle of the rope drum 13, and a pull rope 4 is wound in the groove. The pull rope 4 is an insulating rope to improve the safety of operation. During the tightening process of the pull rope 4, the clip 2 can be tightened synchronously through the meshing action of the chain locking teeth 12 and the clip 2, so as to achieve the purpose of automatically locking the wire 19. The inner arc surface of the hook-shaped end of the main board 5 and the concave arc surface of the clip 2 are installed at the contact part with the wire 19, so as to improve the fixing effect on the wire 19 and prevent the wire 19 from being worn. The two ends of the connecting shaft 11 are respectively connected with the blocking rod 10, and the two blocking rods 10 are respectively located on the outside of the main board 5, which are used to provide a limiting effect for the connecting shaft 11.

[0042] The plate 14 and the spherical member 18 abut against each other, and the two are located between the chain locking teeth 12 and the spring 15. The plate 14 is plate-shaped, and one side edge is provided with at least one tooth-like structure, which is used to abut against the tooth groove of the chain locking teeth 12. The other side edge of the plate 14 opposite to the tooth-like structure is provided with a concave structure, which abuts against one side of the spherical member 18, and the other side of the spherical member 18 is pressed against one end of the spring 15. The inner side surface of the main board 5 is provided with a mounting seat 17, and the mounting seat 17 is provided with a mounting hole coaxial with the spring 15, and the other end of the spring 14 is located in the mounting hole.

[0043] The plate member 14 and the spherical member 18 may be designed as an integrated structure, that is, one end of the integrated structure is used to abut against the chain locking teeth 12 , and the other end is pressed against the end of the spring 15 .

[0044] like Fig.11 As shown, the rotating member 16 is an L-shaped structure, including an operating portion and a penetration portion, the penetration portion passes through the main board 5 and is connected to the plate member 14, and there is a clearance fit between the penetration portion and the main board 5, so the rotating member 16 can be rotated relative to the main board 5 by twisting the operating portion. The penetration portion and the plate member 14 are connected by a key connection, or the cross section of the penetration portion is designed to be rectangular, and a rectangular hole matching the penetration portion is opened on the plate surface of the plate member 14, so that the plate member 14 rotates with the rotating member 16.

[0045] The rotating member 16 drives the plate member 14 to rotate, so that the tooth structure of the plate member 14 abuts against or disengages from the tooth groove of the chain locking tooth 12, so that the chain locking tooth 12 is stopped or kept in a free state, and then the clamping member 2 is stopped or kept in a free state. The rotating member 16 can be designed as a remote control to further improve the convenience of operation.

[0046] The locking process of the self-locking hook is as follows: when installing, first loosen the main board 5 and the clamping member 2, throw the pull rope 4 connected to the chain locking teeth 12 over the wire 19; by pulling the pull rope 4, the wire 19 enters the wire clamp of the clamping member 2, as shown in FIG. Fig.13 As shown; under the action of gravity and inertia, the card connector 2 rotates clockwise, automatically slides into the main board 5 and engages with the chain locking teeth 12, such as Fig.14 After closing, the pull of the pull rope 4 is used to tighten the main board 5 and the card 2 to fix the wire 19, as shown Fig.15 and Fig.16 As shown, by twisting the rotating member 16, the plate member 14 is brought into contact with the interlocking locking teeth 12, so that the interlocking locking teeth 12 and the clamping member 2 are in the stopped position. When removing, the rotating member 16 is twisted in the reverse direction to release the interlocking locking teeth 12 and the clamping member 2, and the pull rope 4 is pulled in the reverse direction to make the locked clamping member 2 come out, so that the wire 19 automatically comes out.

[0047] The self-locking hook has the following features:

[0048] (1) The structure has high strength and can withstand the impact load during the large-scale oscillation of the transmission line. At the same time, it has good matching performance and is suitable for various types of transmission lines. The overall structural strength of the self-locking hook is determined according to the wire diameter, so that it can meet the strength requirements of overhead transmission lines with different voltage levels, wires of different cross-sections, and different wire types, thereby ensuring the safety and reliability of the large-scale oscillation limit device of the transmission line.

[0049] (2) It has a wide coverage range and is applicable to the prevention and control of large-scale oscillations of various types of transmission lines, as well as various emergency response tasks such as fatigue damage to conductors, hardware, poles, towers, and foundations caused by transmission line oscillations.

[0050] (3) There are many application scenarios. UAVs or catapults can be used for long-distance throwing and installation, which solves the problem of installation by UAVs or catapults. At present, the development trend of drone technology is rapid, and it plays an increasingly important role in various emergency delivery, rescue, and blasting scenarios. For the insulating rope used in the large-scale oscillation limit device of the transmission line, when the weather permits, drones can be used for throwing, and the insulating rope can be directly connected to the specified position of the conductor. The operation speed is fast and the throwing accuracy is high. It has incomparable advantages and basically gets rid of the restrictions of the complex geographical location of the transmission line.

[0051] The self-locking hook can also be used in other scenarios where it is needed. For example, in order to achieve a better effect of suppressing large oscillations of the power transmission line, the self-locking hook can be used to lock the insulated wire by winding a single wire or splitting the wire.

[0052] (4) Simple installation, good reliability, and easy matching. The self-locking hook adopts a tooth-engaging locking structure and can be hung freely. During installation, it is only necessary to throw the pull rope 4 connected to the chain locking teeth 12 over the wire. By pulling the pull rope 4, the wire 19 can be clamped between the hook body 1 and the clamping part 2.

[0053] Therefore, the self-locking hook can be used as a technical support for the transmission line oscillation limiting device, especially solving the problem of hanging and removing in emergency handling of large oscillations of the transmission line, and can be widely used in the oscillation prevention and control work of the transmission line.

[0054] The above are merely embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention are included in the scope of the claims of the present invention to be approved.

Claims

1. A self-locking hook, characterized in that: The self-locking hook comprises a hook body (1), a clamping part (2) hinged to the hook body (1), and a locking device respectively connected to the hook body (1) and the clamping part (2); the hook body (1) and the clamping part (2) are respectively provided with a first clamping part (7) and a second clamping part (8); the locking device is connected to a pull rope (4) and is used to drive the clamping part (2) to rotate around a hinge axis under the pull of the pull rope (4), so that the first clamping part and the second clamping part form a closed space to clamp a wire, and limit the clamping part (2).

2. The self-locking hook according to claim 1, characterized in that: The hook body (1) comprises two main boards (5) and a connecting rod (9) located between the two main boards (5), and the two ends of the connecting rod (9) are respectively connected to the two main boards (5); the main board (5) is a plate-like structure with one end in a hook shape, and the inner arc surface of the hook-shaped end forms the first clamping portion (7); the two main boards (5) are arranged in parallel, the two hook-shaped ends are located on the same side, and the clamping member (2) and the locking device are located between the two main boards (5); the clamping member (2) is respectively hinged to the two hook-shaped ends; and the locking device is respectively connected to the two main boards (5).

3. The self-locking hook according to claim 2, characterized in that: The clamping member (2) is a plate-shaped structure with a concave arc surface at the edge, and the concave arc surface is arranged opposite to the inner arc surface to form the second clamping portion (8).

4. The self-locking hook according to claim 3, characterized in that: The locking device comprises a chain locking tooth (12), a rope drum (13), a connecting shaft (11) and a stopper; the chain locking tooth (12) and the rotating disk (13) are both wheel-shaped, the connecting shaft (11) is rod-shaped, the chain locking tooth (12) and the rotating disk (13) are sleeved on the connecting shaft (11), and the two ends of the connecting shaft (11) are respectively connected to the two main boards (5); the outer circle of the chain locking tooth (12) is provided with wheel teeth, the edge of the clamping member (2) is provided with fan-shaped teeth, and the fan-shaped teeth are meshed and connected with the wheel teeth; the rope drum (13) is connected to the pull rope (4); one end of the stopper is connected to the main board (5), and the other end is used to abut against the chain locking tooth (12) for limiting position.

5. The self-locking hook according to claim 4, characterized in that: The connection method between the chain locking teeth (12) and the rotating disk (13) and the connecting shaft (11) includes a key connection.

6. The self-locking hook according to claim 4, characterized in that: The stopping device comprises a stopping mechanism, a spring (15) and a rotating member (16); the stopping mechanism is located between the chain locking tooth (12) and the spring (15); one end of the stopping mechanism is used to abut against the chain locking tooth (12), and the other end is pressed against one end of the spring (15); the other end of the spring (15) is connected to the main board (5); the rotating member (16) is connected to the stopping mechanism and is used to make the stopping mechanism abut against or disengage from the chain locking tooth (12).

7. The self-locking hook according to claim 6, characterized in that: The stop mechanism comprises a plate member (14) and a spherical member (18), wherein the spherical member (18) is located between the plate member (14) and the spring (15); the plate member (14) is plate-shaped, and one side edge is provided with at least one tooth-shaped structure, and the tooth-shaped structure is used to abut against the tooth groove of the chain locking tooth (12); the other side edge of the plate member (14) opposite to the tooth-shaped structure is provided with a concave structure, and the spherical member (18) is spherical, and the concave structure abuts against one side of the spherical member (18), and the other side of the spherical member (18) presses against one end of the spring (15).

8. The self-locking hook according to claim 7, characterized in that: A mounting seat (17) is provided on the inner side surface of the main board (5), and the mounting seat (17) is provided with a mounting hole coaxial with the spring (15), and the other end of the spring (14) is located in the mounting hole.

9. The self-locking hook according to claim 3, characterized in that: The inner arc surface and the concave arc surface are provided with rubber pads.

10. The self-locking hook according to claim 4, characterized in that: A circle of grooves is provided on the outer circumference of the rope drum (13), and the pull rope (4) is wound in the grooves.

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