A de-icing device for a power line

Abstract

The application discloses a power transmission line deicing device and belongs to the technical field of line deicing devices. The device comprises a connecting piece, the connecting piece extends downward along the vertical direction on both sides to form side plates; clamping arms are arranged in two groups and are rotationally connected relative to the side plates, the opposite sides of the two groups of clamping arms are both provided with inclined abutting portions, in the process of downward deflection and closure of the two groups of clamping arms, the device can be clamped on the overhead wire through cooperation of the abutting portions and the side plates; after the abutting portions of the clamping arms abut against the outer ice layer of the overhead wire and the travel of the clamping arms is limited, the rotating piece can still be individually downward overturned relative to the clamping arms, movement space is reserved for the guide piece to slide into the guide straight groove, after the guide piece enters the guide straight groove and pushes the pin to complete locking, the rotating piece and the clamping arms will be combined into a rigid whole; then, the guide piece and the guide straight groove are limited and constrained, reliable fixation of the clamping arms relative to the side plates is realized, even if the device is inverted and hung on the overhead wire, the stable clamping state can be always maintained, and the risk of loosening and falling is eliminated.

Description

Technical Field

[0001] This invention relates to the field of line de-icing devices, and particularly to a line de-icing device for power transmission lines. Background Technology

[0002] Overhead power transmission and distribution lines are exposed to the outdoor natural environment for a long time. In low temperature and rainy or snowy weather, cable icing is very likely to occur. Icing will greatly increase the load on the cables, which will not only easily cause changes in cable sag, tower tilting or even tower collapse and line breakage, but also affect the stability and safety of power transmission. Therefore, timely and effective de-icing of overhead power lines is a key part of the winter operation and maintenance of the power system.

[0003] Chinese invention patent CN121906334B discloses a self-separating explosive de-icing device and explosive de-icing method. Compared with existing explosive de-icing devices, the clamping arm of the present invention does not require an additional independent opening and closing triggering mechanism. By utilizing the transmission path switching of the constraint cylinder's own gravity, the automatic locking and unlocking between the clamping arm and the overhead power line can be achieved.

[0004] Existing de-icing equipment of this type relies on the cooperation of clamping arms and side plates to lock and fix the entire machine on the cable. However, the clamping arms adopt an integrated L-shaped structure, and the clamping section in contact with the cable is arranged horizontally. Due to the uneven thickness of the ice layer on the outer layer of the overhead power line, this structure will have the following problems: First, when the clamping arms are retracted, they are prone to interference with the ice layer, making it impossible to clamp the cable properly; second, if the size of the clamping arms is adjusted to avoid interference, a gap will remain between the clamping arms and the ice layer after clamping. When the equipment is suspended upside down, a gap will form between the side plate and the ice layer on the outer side of the cable. When the deflagration filling inside the confinement cylinder is ignited, the cylinder needs to move a certain distance relative to the cable before impacting the ice layer, which not only reduces the explosive impact force and weakens the de-icing effect, but also causes impact damage to the overhead power line itself due to the hard impact.

[0005] Therefore, it is necessary to provide a power transmission line de-icing device to solve the above-mentioned technical problems. Summary of the Invention

[0006] The purpose of this invention is to provide a de-icing device for power transmission lines to solve the technical problems mentioned in the background section.

[0007] Based on the above ideas, the present invention provides the following technical solution: a power transmission line de-icing device, comprising: The connector extends downwards on both sides in the vertical direction to form side plates; The clamping arms are provided in two sets and are rotatably connected to the side plate. Each set of clamping arms has an inclined abutment on the opposite side. During the downward deflection and closing of the two sets of clamping arms, the device can be clamped to the overhead power line through the cooperation of the abutment and the side plate. The constraint cylinder is fixedly connected to the connector and is filled with explosive filler inside. A rotating component is located on one side of the clamping arm and is rotatably connected to the side plate. The rotating component is provided with a guide groove and a guide straight groove. The guide is slidably connected relative to the connector in the vertical direction; The stop pin is fixed to the side of the clamping arm near the rotating part. When the guide part cooperates with the guide groove to drive the rotating part to deflect outward, the clamping arm can be driven to open outward synchronously through the cooperation of the rotating part and the stop pin. The limiting member is fixedly connected to the clamping arm and is located on the side of the clamping arm near the rotating member. During the movement of the guide member in the guide groove, it can push the locking pin arranged in the guide groove to engage with the limiting member to lock the rotating member and the clamping arm.

[0008] As a further aspect of the present invention: after the guide member transitions from the guide groove to the guide straight groove, the rotating member remains stationary relative to the side plate, and the guide straight groove remains perpendicular to the connecting member.

[0009] As a further aspect of the present invention: a pull rod is provided at the connector, the pull rod is slidably connected to the connector in the vertical direction, and the guide is provided at one end of the pull rod near the clamping arm.

[0010] As a further aspect of the present invention: the rotation axis of the rotating member relative to the side plate is arranged to coincide with the rotation axis of the clamping arm relative to the side plate.

[0011] As a further aspect of the present invention: the limiting member is an arc-shaped plate structure, and the center of the inner circular surface of the limiting member is located on the rotation axis of the clamping arm. The inner circular surface of the limiting member is provided with multiple sets of limiting holes that engage with the locking pin. The locking pin is elastically connected to the rotating member along the diameter direction of the limiting member.

[0012] As a further aspect of the present invention: the end of the locking pin near the limiting member is provided with a conical surface, and the end of the limiting hole near the locking pin is provided with a chamfer.

[0013] As a further aspect of the present invention: a protrusion is fixedly connected to the bottom end of the pull rod, and an elastic element is provided between the protrusion and the connecting member, so that the pull rod elastically engages with the connecting member along its axial direction.

[0014] As a further aspect of the present invention: a pin is provided at the rotation axis of the clamping arm and the rotating component, the pin is fixedly connected to the side plate, and the pin passes through the clamping arm and the rotating component and rotates with both of them.

[0015] As a further aspect of the present invention: the inner circular surface of the limiting member and the side away from the clamping arm extends outward along the diameter direction to form a limiting protrusion, and the end of the rotating member near the limiting member is located between the limiting protrusion and the clamping arm.

[0016] As a further aspect of the present invention: the guide is elastically connected to the protrusion, and a limiting pin is slidably mounted on the protrusion along the diameter direction of the guide. The limiting pin is inserted into the guide, and the limiting pin is connected to the end cap at the end of the constraint cylinder through a traction member.

[0017] Compared with the prior art, the beneficial effects of this invention are as follows: This device adds an independent rotating component to the outside of the clamping arm, forming a split-linkage structure. When the clamping arm's contact part abuts against the outer layer of ice on the overhead power line, restricting the arm's travel, the rotating component can still independently rotate downwards relative to the clamping arm, reserving movement space for the guide component to slide into the guide groove. Once the guide component enters the guide groove and pushes the locking pin to complete the locking, the rotating component and the clamping arm will combine into a rigid whole; then, relying on the limiting constraint of the guide component and the guide groove, reliable fixation of the clamping arm relative to the side plate is achieved. Even if the device is suspended upside down on the overhead power line, it can always maintain a stable clamping state, eliminating the risk of loosening and falling. Attached Figure Description

[0018] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0019] Figure 1 This is a schematic diagram of the clamping arm in the existing design; Figure 2 This is a schematic diagram showing the position of the device relative to the overhead power line after it is inverted in the existing scheme; Figure 3 This is a schematic diagram of the state in which the abutting part and the stop part of the present invention clamp the overhead power line in cooperation; Figure 4 This is a schematic diagram of the overall structure of the present invention; Figure 5 This is a schematic diagram of the cooperation between the guide and the rotating component of the present invention; Figure 6 This is a schematic diagram of the present invention showing how the rotating component, after engaging with the stop pin, drives the clamping arm to open outward. Figure 7 This is a schematic diagram showing the downward deflection of the rotating component relative to the clamping arm after the clamping arm of the present invention is restricted from moving. Figure 8 This is a schematic diagram showing the relative position of the device of the present invention after it is inverted and the overhead power line; Figure 9 This is a schematic diagram of the cooperation between the limiting member and the rotating member of the present invention; Figure 10 This is the present invention. Figure 9 A magnified structural diagram at point A; Figure 11 This is a schematic diagram of the connection structure between the limiting pin and the end cap of the present invention.

[0020] In the diagram: 1. Connector; 2. Side plate; 201. Stop; 3. Clamping arm; 301. Inclined groove; 302. Straight groove; 303. Abutment; 4. Overhead power cable; 5. Guide; 6. Constraint cylinder; 601. End cap; 7. Pull rod; 8. Pin; 9. Protrusion; 10. Elastic element; 11. Rotating element; 1101. Guide inclined groove; 1102. Guide straight groove; 12. Stop pin; 13. Limiting element; 1301. Limiting hole; 1302. Chamfer; 1303. Limiting protrusion; 14. Locking pin; 1401. Conical surface; 1402. Protrusion; 15. Sliding element; 1501. Positioning protrusion; 16. Limiting pin; 17. Traction element; 18. Ignition assembly; 19. Guide cylinder. Detailed Implementation

[0021] like Figures 1 to 11 As shown, a power transmission line de-icing device includes a plate-shaped connector 1, side plates 2 fixed to both sides of the bottom of the connector 1, and clamping arms 3 disposed on the inner side of the side plates 2 and hinged to the side plates 2. The hinge axis of the clamping arms 3 is perpendicular to the plate surface of the side plates 2. The side plates 2 are used to position the overall device relative to the overhead power line 4, so that the two sets of clamping arms 3 can clamp the overhead power line 4 during the downward deflection of the two sets of clamping arms around the hinge axis, thereby locking the entire device to the overhead power line 4.

[0022] A constraint cylinder 6 and an ignition assembly 18 are fixedly mounted on the connector 1. The constraint cylinder 6 can be filled with explosive fillers such as black powder. The end of the constraint cylinder 6 facing away from the connector 1 is sealed with an end cap 601 by an adhesive bonding process. When the explosive filler inside the constraint cylinder 6 is ignited, a high-pressure impact airflow is generated instantly inside. The huge impact force directly tears the adhesive joint, causing the end cap 601 to quickly detach from the constraint cylinder 6, thereby releasing the reverse explosive thrust. The ignition assembly 18 adopts a remote electronically controlled triggering mode. It is wirelessly connected to the ground control terminal. After the operator sends an ignition command through the control terminal on the ground, the ignition assembly 18 receives the signal and instantly generates a high-temperature spark. The high-temperature spark is quickly conducted to the explosive filler inside the constraint cylinder 6 through the lead wire, igniting the explosive filler and triggering its rapid explosive reaction, thereby generating a reverse thrust that causes the overhead power line 4 to vibrate.

[0023] During on-site operations, a drone is used to lift the entire de-icing device into the air and drop it to the target de-icing point on the overhead power line 4. The clamping arm 3 clamps and secures the ice-covered overhead power line 4. After the drone releases the device and detaches, the entire device hangs upside down on the overhead power line 4. Ground personnel remotely issue an ignition command to ignite the deflagration packing inside the constraint cylinder 6. The gas pressure inside the constraint cylinder 6 rises sharply and instantaneously, and the end cap 601, which is sealed at the end, instantly detaches under high pressure. The reverse impact force released by the deflagration causes the overhead power line 4 to vibrate violently at high frequency. The vibration quickly peels off and removes the ice from the cable surface, achieving efficient de-icing operations.

[0024] See attached document Figure 1 Appendix Figure 2 It is known that the clamping arm 3 in the prior art adopts an L-shaped structure, with its vertical section hinged to the side plate 2, relying on the cooperation of the horizontal section and the side plate 2 to clamp the overhead power line 4. The vertical section of the clamping arm 3 has interconnected inclined grooves 301 and straight grooves 302; the connecting piece 1 is slidably mounted with a pull rod 7 in the vertical direction, and the top of the pull rod 7 is equipped with a lifting ring, which can be quickly connected to the rope hook at the bottom of the drone. The lower end of the pull rod 7 is equipped with a guide 5, which can slide and adapt to the inclined groove 301 and the straight groove 302. (See attached...) Figure 1 Working state: When the guide 5 slides along the inclined groove 301, it can drive the clamping arm 3 to rotate around the hinge axis; when the guide 5 slides into the straight groove 302, the clamping arm 3 locks relative to the side plate 2, and the whole device can be firmly clamped on the overhead power line 4.

[0025] However, in actual de-icing conditions, the overhead power line 4 is covered with ice of varying thickness, causing significant fluctuations in its overall outer diameter. When the stop 201 at the bottom of the side plate 2 is positioned against the ice layer, the horizontal clamping section of the clamping arm 3 easily rubs against and interferes with the ice layer on the outside of the overhead power line 4 when rotating downwards, making it difficult for the clamping arms 3 to close smoothly. To avoid this interference problem, the vertical section of the clamping arm 3 must be lengthened so that after the clamping arm 3 rotates downwards around the hinge axis, the horizontal section can reach below the ice layer to lock and fix it. Figure 2 As shown, after the vertical section is lengthened, when the drone release device and equipment are suspended upside down, a gap m will form between the side plate 2 and the outer layer of ice on the overhead power line 4. At this time, the deflagration filler inside the constraint cylinder 6 will be ignited, and the thrust generated by the explosion will first drive the entire device upwards a distance m before the side plate 2 impacts the ice layer. This results in: the explosive impact force cannot be directly and synchronously transmitted to the overhead power line 4, and the energy is lost during the displacement process, significantly weakening the de-icing vibration effect; the hard collision between the device and the ice layer can easily cause impact damage to the overhead power line 4, reducing the line protection performance.

[0026] To address the shortcomings of existing technologies, this invention provides a preferred embodiment that optimizes the original clamping structure: the abutment portion 303, which was originally arranged perpendicular to the vertical section of the clamping arm 3, is redesigned to be inclined relative to the vertical section of the clamping arm 3, with an angle greater than 90°. Combined with... Figure 3 As can be seen, when the side plate 2 is mounted on the target position of the overhead power line 4, during the downward flipping process of the clamping arm 3, the inclined abutment part 303 can fit against the outer ice-covered surface of the overhead power line 4; relying on the cooperation between the abutment part 303 and the stop part 201, a three-point stable clamping structure is formed for the overhead power line 4. This clamping form can be adapted to various thicknesses of line ice. After the equipment is inverted and suspended, the stop part 201 of the side plate 2 always keeps close to the outer ice layer of the overhead power line 4. The impact force generated by the deflagration filling inside the constraint cylinder 6 can be directly and synchronously transmitted to the overhead power line 4 to cause it to vibrate and de-ice, completely eliminating the problem of hard collision between the device and the ice layer of the overhead power line 4.

[0027] Combination Figure 3 and Figure 8 Further analysis reveals that while the inclined contact part 303 can accommodate different ice thicknesses, when the ice thickness on the overhead power line 4 is large, the clamping state of the device is as follows: Figure 3 As shown: After the abutment part 303 clamps the ice layer, the guide 5 remains inside the inclined groove 301. When the device is suspended upside down, its own weight creates a large compressive force between the abutment part 303 and the ice layer. This pressure is further converted into an interaction force between the groove wall of the inclined groove 301 and the guide 5, continuously driving the clamping arm 3 to open outward around the hinge axis. This poses a safety hazard that the entire device may fall off the overhead power line 4. The thicker the ice layer, the more significant this risk of instability.

[0028] To address the issue of device loosening under thick icing conditions, this invention further optimizes the structure of clamping arm 3, as detailed in the appendix. Figure 4 To be continued Figure 10 On the side of the clamping arm 3, a rotating component 11 is formed, and the aforementioned guide component 5 cooperates with this rotating component 11. Specifically, the rotating component 11 is divided into an inclined section and a vertical section. A pin 8 is fixed between the two side plates 2. The pin 8 passes through both the clamping arm 3 and the rotating component 11, forming a rotating pair, so that the clamping arm 3 and the rotating component 11 share the same hinge axis. The inclined section and the vertical section of the rotating component 11 are respectively provided with interconnected guide grooves 1101 and guide straight grooves 1102. The width of both types of grooves is greater than the outer diameter of the guide component 5, allowing the guide component 5 assembled at the end of the pull rod 7 to slide smoothly inside the guide grooves 1101 and guide straight grooves 1102. Figure 6 As shown, the clamping arm 3 adopts a hollowed-out molding structure, and a stop pin 12 is fixedly installed on its side wall near the rotating part 11.

[0029] When the guide 5 slides vertically upward along the guide groove 1101, it will push the rotating part 11 to rotate outward around the pin 8; after the rotating part 11 is in contact with the stop pin 12, it can simultaneously drive the clamping arm 3 to open outward together. Conversely, when the equipment is clamping the overhead wire 4, the guide 5 slides downward along the guide groove 1101, driving the rotating part 11 and the clamping arm 3 to retract downward synchronously; if the clamping arm 3 is restricted in its travel after being covered by ice on the outer layer of the overhead wire 4, the guide 5 can continue to slide downward along the guide groove 1101, driving the rotating part 11 to independently deflect downward relative to the clamping arm 3 around the pin 8, until the guide 5 slides into the guide groove 1102, after which the rotating part 11 stops deflecting and remains fixed. Figure 7 As shown, the guide groove 1102 is perpendicular to the connector 1 at this time.

[0030] Further optimization of the structural design: A limiting member 13 is provided on the side of the clamping arm 3 facing the rotating part 11, and at the end of the rotating part 11 away from the pin 8. The limiting member 13 is an arc-shaped plate structure and is fixedly connected to the clamping arm 3. The center of its arc coincides with the rotation axis of the pin 8, ensuring that the outer end of the rotating part 11 can move in contact with the inner arc surface of the limiting member 13 throughout the entire rotation process. A locking pin 14 is installed in the area of ​​the rotating part 11 located in the guide groove 1102, which can match and engage with the limiting member 13. When the guide member 5 slides down along the guide groove 1102, it will press down and push the locking pin 14 to insert into the limiting member 13 to complete the insertion, thereby achieving rigid locking between the rotating part 11 and the clamping arm 3.

[0031] Thanks to this locking mechanism, even if the overhead power line 4 is covered with a thick layer of ice, and the clamping arm 3 is in an inclined clamping posture after the contact part 303 is in contact with the ice layer, the clamping arm 3 can still be locked to the side plate 2 by means of the locking cooperation between the rotating part 11 and the clamping arm 3, and further by the limiting constraint of the guide part 5 and the guide groove 1102. This effectively eliminates the risk of the clamping arm 3 opening outward and falling off under the action of gravity when the device is upside down and suspended, ensuring the reliability of the clamping connection between the entire device and the overhead power line 4.

[0032] Combined with appendix Figure 9 Appendix Figure 10 As can be seen, the locking pin 14 is arranged radially along the connector 1. The locking pin 14 passes through the lower end of the rotating member 11 and forms a radial elastic sliding fit with the rotating member 11. When the guide member 5 slides down along the guide groove 1102 and presses against the locking pin 14, it can push the locking pin 14 to move radially toward the limiting member 13, so that it inserts into the limiting hole 1301 opened on the inner arc surface of the limiting member 13, thereby completing the locking and fixing between the rotating member 11 and the clamping arm 3.

[0033] The end of the locking pin 14 facing the limiting member 13 is machined with a tapered surface 1401; the inner arc surface of the limiting member 13 is provided with multiple sets of limiting holes 1301 along the circumference, and each limiting hole 1301 has a chamfer 1302 at the port where it mates with the locking pin 14. Relying on the guiding cooperation of the tapered surface 1401 and the chamfer 1302, the locking pin 14 can be smoothly inserted into the limiting hole 1301, effectively avoiding the problem of jamming or interference between the locking pin 14 and the limiting member 13 during the insertion process.

[0034] In summary, this device adds an independent rotating component 11 to the outside of the clamping arm 3, forming a split-linkage structure. When the abutting part 303 of the clamping arm 3 abuts against the outer layer of ice on the overhead power line 4, restricting the stroke of the clamping arm 3, the rotating component 11 can still independently rotate downward relative to the clamping arm 3, reserving movement space for the guide component 5 to slide into the guide groove 1102. After the guide component 5 enters the guide groove 1102 and pushes the locking pin 14 to complete the locking, the rotating component 11 and the clamping arm 3 will be combined into a rigid whole; then, relying on the limiting constraint of the guide component 5 and the guide groove 1102, the clamping arm 3 is reliably fixed relative to the side plate 2. Even if the device is suspended upside down on the overhead power line 4, it can always maintain a stable clamping state, eliminating the risk of loosening and falling.

[0035] Combined with appendix Figure 4 Appendix Figure 5 and appendix Figure 11 A protrusion 9 is fixedly mounted on the lower end of the pull rod 7; the guide 5 is installed on the side of the protrusion 9 facing the clamping arm 3, and can elastically extend and retract relative to the protrusion 9 along the axial direction of the pin 8. A groove adapted to the guide 5 is provided inside the protrusion 9, and a tension spring is installed between the end of the groove and the guide 5 to provide a restoring force for the guide 5. Figure 11 As shown, a limiting pin 16 is radially slidably mounted on the protrusion 9 along the guide 5, and a groove is opened on the outer wall of the guide 5 for the limiting pin 16 to be inserted and engaged; in the initial clamping state of the equipment, the end of the limiting pin 16 is embedded in the groove, locking and fixing the guide 5 and the protrusion 9.

[0036] The limiting pin 16 is connected to the end cap 601 at the end of the constraint cylinder 6 via a traction member 17 such as a rope. When the deflagration packing inside the constraint cylinder 6 is ignited, the high-pressure impact detaches the end cap 601 from the constraint cylinder 6. The detached end cap 601 pulls the limiting pin 16 with the help of the traction member 17, causing it to disengage from the groove of the guide member 5. After the constraint is released, the guide member 5 retracts inward under the action of the tension spring and is offset from the rotating member 11. The clamping arm 3, freed from the limiting restraint, can open outward around the pin shaft 8, and the entire device automatically detaches from the overhead power line 4. This self-detaching structure is only one of the preferred embodiments of the present invention. In actual use, the line separation structure described in the existing patent CN121906334B can also be selected. The specific scheme will not be described in detail here.

[0037] Combination Figure 4As shown, the inner circular surface of the limiting member 13 extends outward along its diameter direction on the side away from the clamping arm 3 to form a limiting protrusion 1303, so that the end of the rotating member 11 away from the pin 8 is between the limiting protrusion 1303 and the clamping arm 3, which is beneficial to constrain the end of the rotating member 11 away from the pin 8 along the axis of the pin 8 and improve its rotational stability.

[0038] Combined with appendix Figure 4 Appendix Figure 5 As can be seen, a guide cylinder 19 is fixedly mounted on the connector 1, and the pull rod 7 passes through the guide cylinder 19 and forms a vertical sliding fit with it; an elastic element 10 is assembled between the protrusion 9 and the guide cylinder 19, and the elastic element 10 is preferably a spring structure. After the UAV lowers the entire device to the target position of the overhead power line 4 and releases the pull rod 7, the pull rod 7 can automatically descend under the elastic force of the elastic element 10, driving the guide 5 to slide along the guide inclined groove 1101 and the guide straight groove 1102, and finally driving the clamping arm 3 to complete the locking of the relative side plate 2. Relying on the elastic element 10 to provide the downward driving force can reduce the counterweight of the protrusion 9 and the pull rod 7, which helps to achieve the overall lightweight of the device; at the same time, when the device is upside down, the elastic element 10 can continuously maintain the stability of the pull rod 7, effectively preventing the pull rod 7 from resetting.

[0039] like Figure 10 As shown, the end of the locking pin 14 opposite to the limiting member 13 extends radially outward to form a protrusion 1402. A limiting spring is provided between the protrusion 1402 and the bottom end of the guide groove 1102, and the limiting spring can be sleeved on the outside of the locking pin 14. A plate-shaped sliding member 15 is arranged on the outside of the protrusion 1402. The sliding member 15 passes through the through groove reserved in the rotating member 11 and can slide relative to the rotating member 11 along the direction of the guide groove 1102. Both ends of the sliding member 15 are fixed with positioning protrusions 1501, which fit against the outer wall of the rotating member 11 to restrict the sliding member 15 so that it can only move linearly along the extension direction of the guide groove 1102, and to prevent deviation or disengagement.

[0040] The above-disclosed examples are merely preferred embodiments of this application, intended to facilitate understanding and implementation by those skilled in the art. However, they cannot be used to limit the scope of this application. Therefore, equivalent variations made within the scope of this application are still within the scope of this application.

Claims

1. A de-icing device for power transmission lines, characterized in that, include: Connector (1), the two sides of connector (1) extend downward in the vertical direction to form side plates (2); The clamping arms (3) are provided in two sets and are rotatably connected relative to the side plate (2). Each set of clamping arms (3) has an inclined abutment part (303) on the opposite side. During the downward deflection and closing process of the two sets of clamping arms (3), the device can be clamped to the overhead wire (4) through the cooperation of the abutment part (303) and the side plate (2). The constraint cylinder (6) is fixedly connected to the connector (1) and is filled with explosive filler inside; A rotating component (11) is provided on one side of the clamping arm (3) and is rotatably connected to the side plate (2). The rotating component (11) is provided with a guide groove (1101) and a guide straight groove (1102). The guide (5) is slidably connected relative to the connector (1) in the vertical direction; The stop pin (12) is fixed to the side of the clamping arm (3) near the rotating part (11). When the guide (5) and the guide groove (1101) cooperate to drive the rotating part (11) to deflect outward, the clamping arm (3) can be driven to open outward synchronously through the cooperation of the rotating part (11) and the stop pin (12). The limiting member (13) is fixedly connected to the clamping arm (3) and is located on the side of the clamping arm (3) near the rotating member (11). During the movement of the guide member (5) in the guide groove (1102), it can push the locking pin (14) arranged in the guide groove (1102) to make it engage with the limiting member (13) to lock the rotating member (11) and the clamping arm (3).

2. The de-icing device for transmission lines according to claim 1, characterized in that: When the guide (5) transitions from the guide groove (1101) to the guide straight groove (1102), the rotating member (11) remains stationary relative to the side plate (2), and the guide straight groove (1102) remains perpendicular to the connecting member (1).

3. The de-icing device for transmission lines according to claim 2, characterized in that: A pull rod (7) is provided at the connector (1), and the pull rod (7) is slidably connected to the connector (1) in the vertical direction. The guide (5) is provided at one end of the pull rod (7) near the clamping arm (3).

4. The de-icing device for transmission lines according to claim 3, characterized in that: The rotation axis of the rotating component (11) relative to the side plate (2) is set to coincide with the rotation axis of the clamping arm (3) relative to the side plate (2).

5. A de-icing device for transmission lines according to claim 4, characterized in that: The limiting member (13) is an arc-shaped plate structure, and the center of the inner circle of the limiting member (13) is on the rotation axis of the clamping arm (3). The inner circle of the limiting member (13) has multiple sets of limiting holes (1301) that are inserted and cooperate with the locking pin (14). The locking pin (14) is elastically connected to the rotating member (11) along the diameter direction of the limiting member (13).

6. A de-icing device for transmission lines according to claim 5, characterized in that: The end of the locking pin (14) near the limiting member (13) is provided with a conical surface (1401), and the end of the limiting hole (1301) near the locking pin (14) is provided with a chamfer (1302).

7. A de-icing device for transmission lines according to claim 3, characterized in that: The bottom end of the pull rod (7) is fixedly connected to a protrusion (9), and an elastic element (10) is provided between the protrusion (9) and the connector (1), so that the pull rod (7) and the connector (1) are elastically engaged along its axial direction.

8. A de-icing device for transmission lines according to claim 1, characterized in that: A pin (8) is provided at the rotation axis of the clamping arm (3) and the rotating component (11). The pin (8) is fixedly connected to the side plate (2), and the pin (8) passes through the clamping arm (3) and the rotating component (11) and rotates with both of them.

9. A de-icing device for transmission lines according to claim 1, characterized in that: The inner circular surface of the limiting member (13) and the side away from the clamping arm (3) extends outward along the diameter direction to form a limiting protrusion (1303). The end of the rotating member (11) near the limiting member (13) is located between the limiting protrusion (1303) and the clamping arm (3).

10. A de-icing device for transmission lines according to claim 7, characterized in that: The guide (5) is elastically connected to the protrusion (9). A limiting pin (16) is slidably mounted on the protrusion (9) along the diameter direction of the guide (5). The limiting pin (16) is inserted into the guide (5), and the limiting pin (16) is connected to the end cap (601) at the end of the constraint cylinder (6) through a traction member (17).

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