Mechanical autonomous deicing device for power transmission line

Abstract

The invention provides a power transmission line mechanical autonomous deicing device which is provided with a protective cover, a piezoelectric induction device, a mechanical deicing escapement device and a stop lever structure, the mechanical deicing escapement device comprises an escape wheel, a fixing rod and an escapement fork part, the escape wheel is a circular ring, the inner circle edges of the circular rings on the two sides protrude out of the circular ring by a part to form protruding sections, and the fixing rod and the escapement fork part are arranged on the protective cover. The top of the inner circle is an inner ring hinge which can be opened and closed, the top of the outer circle is an outer ring hinge which can be opened and closed, and the inner ring hinge and the outer ring hinge sleeve the wire with the mechanical deicing escapement device; and sharp sawteeth are arranged on the outer circle. When icing reaches a certain thickness, gravity presses a gravity lever to trigger a piezoelectric device, electric energy is released to drive a motor stop lever structure, a mechanical deicing escapement device is released, mechanical active deicing is achieved through rotation of an escapement wheel and cutting of an icing body by sawteeth, and the operation reliability of a power transmission line is guaranteed. And an over-thick ice layer does not appear on the wire without waiting for operation and maintenance repair personnel.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of power transmission line auxiliary device, and is a device for deicing power transmission line. BACKGROUND

[0002] Power transmission line is the most critical part of power transmission, which includes overhead line and cable line. When the adverse weather conditions such as low temperature and freezing rain occur, especially in special geographical areas such as mountainous areas and high altitudes, the surface of overhead conductor and tower will quickly condense ice layer, which not only greatly increases the weight of the line, causes the conductor sag to increase, and the tower to tilt and collapse under heavy load, but also may cause electrical faults, such as the reduction of conductor spacing due to icing, flashover discharge, short circuit tripping and other problems. Uneven icing will also cause the conductor to dance violently under the action of wind, aggravating the risk of line damage and seriously threatening the safety of the line.

[0003] Because icing has many threats to the safe operation of power transmission line, deicing is particularly necessary. If deicing is not done in time, serious icing disasters may cause the power transmission line to be out of service, and further cause large-scale power outages. Therefore, it is particularly important to deice in time and ensure the safe and stable operation of the power transmission line.

[0004] With the promotion of policy and technology development, the current deicing of power transmission line is developing towards intelligence and high efficiency. In terms of monitoring and early warning, a system is built by means of digital means, which mainly includes online monitoring and manual ice observation. In terms of technology, it develops from traditional AC and DC deicing to intelligent circulating current deicing, laser deicing and other technologies. In terms of deicing equipment, deicing robots and mechanical vibration deicing devices are gradually optimized. However, at present, deicing is mainly passive, and the problem of insufficient or untimely active defense is still prominent. SUMMARY

[0005] The present application aims to provide a mechanical autonomous deicing device for power transmission line.

[0006] The technical scheme adopted by the present application is as follows: a mechanical autonomous deicing device for power transmission line, comprising a protective cover, a piezoelectric sensing device A, a mechanical deicing escapement device B and a blocking rod structure C. The protective cover has an arc sag for overhead power transmission line and is connected with a plurality of line spacer bars. One end of the protective cover is connected to the high line spacer bar by a connecting piece to fix the position of the protective cover. The protective cover encloses the power transmission line. The piezoelectric sensing device A is fixed to the upper part of the outer side of the protective cover. The piezoelectric sensing device A comprises a piezoelectric device and a gravity lever. The piezoelectric device comprises a cantilever beam type piezoelectric vibrator and a super capacitor, which need to be packaged and protected. The gravity lever needs to be coated with a conductive coating. One connecting wire of the piezoelectric device is connected to the gravity lever 5. In the non-deicing state, the mechanical deicing escapement device B is located in the protective cover, and the blocking rod structure C is used to block the mechanical deicing escapement device B. The mechanical de-icing escapement B comprises an escapement wheel, a fixed rod, and an escapement fork. The escapement wheel is a circular ring, and the inner edges of the circular rings on both sides protrude from a portion of the circular ring to form a protruding section. The top of the inner circle is an inner ring hinge with an opening and closing function, and the top of the outer circle is an outer ring hinge with an opening and closing function. The inner ring hinge and the outer ring hinge wrap the mechanical de-icing escapement around the wire. The outer circle is provided with equidistant saw teeth, which are oblique triangles with sharp edges. A long rod is fixed on each of the left and right sides of the protective cover. The length of the long rod is shorter than the length of the protective cover. One end of the long rod is fixed to the protective cover, and the other end is a free hanging end. The free hanging end is used to enable the mechanical de-icing escapement device B to slide out of the protective cover. There are two fixed rods, each with rings on both sides. One side is a closed ring that is inserted into the long rod from the free end of the long rod, and the other side is an open ring with a notch that is inserted into the protruding section of the escape wheel. The pallet fork portion B1 includes a pallet fork, a connecting rod, a ring, an oscillating ball, an oscillating rod, and a connecting shaft. The oscillating ball is fixedly connected to the oscillating rod. There is a hole on the connecting shaft, and the oscillating rod passes through the hole. When the oscillating rod moves upward through the hole, it stops when the oscillating ball approaches the connecting shaft; when the oscillating rod moves downward through the hole, it stops when the upper end of the oscillating rod is stuck on the connecting shaft. At this time, the relative positions of the pallet fork and the oscillating rod are fixed. When the oscillating ball drives the oscillating rod to perform a pendulum motion, the pallet fork moves synchronously. The connecting rod consists of two parts, left and right, which are respectively fixedly connected to the ring. The ring has a notch. The left and right rings are respectively inserted into the protruding section of the escape wheel. There are multiple sets of mechanical de-icing escapement devices B, each set of mechanical de-icing escapement devices B is mounted on the long rod from the free end of the long rod through a ring at the end of the fixed rod, and the adjacent mechanical de-icing escapement devices B are kept at a relative distance by the protruding section.

[0007] The present invention achieves the following beneficial effects: timely, autonomous mechanical deicing, ensuring timely deicing of the device and preventing excessive ice buildup on the conductors, eliminating the need to wait for emergency repair personnel to arrive. It also offers simple installation, timely deicing, and high practicality. The mechanical deicing escapement B has a simple structure and, compared to robotic deicing devices, reduces the use of metal materials. If materials such as hard plastic were used, the device would be lightweight and not burden line operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an overall schematic diagram of the device of the present invention; Figure 2 is a structural diagram of a piezoelectric sensing device; Figure 3 It is a left side view of the mechanical de-icing escapement; Figure 4 It is a structural diagram of the fixed rod; Figure 5 This is the left side view of the escapement fork; Figure 6 This is the main view of the escapement fork part; Figure 7 It is a schematic diagram of the barrier rod structure; Figure 8 It is a schematic diagram of the application of the device of the present invention; Figure 9 It is the principle diagram of the baffle structure; Markings in the figure: 1-protective cover, 2-hook, 3-long rod, 4-piezoelectric device, 5-gravity lever, 6-connecting wire, 7-escapement wheel, 8-fixing rod, 9-inner ring hinge, 10-outer ring hinge, 11-closed ring, 12-open ring, 13-escapement fork, 14-connecting rod, 15-ring, 16-oscillation ball, 17-oscillation rod, 18-connecting shaft, 19-motor, 20-motor shaft extension ring, 21-bump, 22-spindle, 23-wire, 24-spindle wheel, 25-winding wheel, 26-winding spool, 27-housing, 28-pulling wire, 29-telescopic tube, 30-stop lever; 15-1, left ring; 15-2, right ring; A-piezoelectric sensing device, B-mechanical de-icing escapement, B1-escapement fork part, C-gear lever structure. DETAILED DESCRIPTION

[0009] The present invention will be further described by the following examples, but the protection scope of the present invention is not limited thereto.

[0010] A mechanical autonomous de-icing device for a transmission line comprises a protective cover 1, a piezoelectric sensing device A, a mechanical de-icing escapement device B, and a barrier rod structure C. The protective cover 1 has a sag for overhead transmission lines and is connected to a plurality of line spacers. One end of the protective cover 1 is connected to a line spacer located at a high position by a connector to fix the position of the protective cover 1. The protective cover 1 wraps the transmission line therein. The piezoelectric sensing device A is fixed to the upper outer portion of the protective cover 1. The piezoelectric sensing device A includes a piezoelectric device 4 and a gravity lever 5. The piezoelectric device 4 needs to be encapsulated for protection, and the gravity lever 5 needs to be coated with a conductive coating. A connecting wire 6 of the piezoelectric device 4 is connected to the gravity lever 5. In the non-de-icing state, the mechanical de-icing escapement device B is located inside the protective cover 1, and the barrier rod structure C is used to block the mechanical de-icing escapement device B.

[0011] The mechanical de-icing escapement device B includes an escapement wheel 7, a fixed rod 8, and an escapement fork part B1. The escapement wheel 7 is a circular ring. The inner circle edges of the circular rings on both sides protrude from a part of the circular ring, forming a protruding section. The top of the inner circle is an inner ring hinge 9, which can be opened and closed. The top of the outer circle is an outer ring hinge 10, which can be opened and closed. The inner ring hinge 9 and the outer ring hinge 10 put the mechanical de-icing escapement device B on the wire; the outer circle is provided with equidistant serrations, which are oblique triangles with sharp edges and the same size, and are arranged in a circular matrix.

[0012] A long rod 3 is fixed on each of the left and right sides of the inside of the protective cover 1. The length of the long rod 3 is smaller than the length of the protective cover 1. One end of the long rod 3 is fixed to the protective cover 1 and the other end is a free hanging end. The free hanging end is used to enable the mechanical de-icing escapement device B to slide out of the protective cover 1.

[0013] There are two fixing rods 8, each with rings on both sides. One side is a closed ring 11, which is inserted into the long rod 3 from the free suspended end of the long rod 3, and the other side is an open ring 12, which has a notch and is inserted into the protruding section of the escape wheel 7.

[0014] The pallet fork part B1 includes an escapement fork 13, a connecting rod 14, a ring 15, an oscillating ball 16, an oscillating rod 17, and a connecting shaft 18. The oscillating ball 16 is fixedly connected to the oscillating rod 17. There is a hole on the connecting shaft 18, and the oscillating rod 17 passes through the hole. The oscillating rod 17 can move upward through the hole until the oscillating ball 16 is close to the connecting shaft 18; the oscillating rod 17 can move downward through the hole until the upper end of the oscillating rod 17 is stuck at the connecting shaft 18. At this time, the relative positions of the escapement fork 13 and the oscillating rod 17 are fixed. When the oscillating ball 16 drives the oscillating rod 17 to perform a pendulum motion, the escapement fork 13 moves synchronously.

[0015] The connecting rod 14 includes two parts, left and right, which are respectively fixedly connected to a ring 15. The ring 15 has a notch. The left and right rings 15 are a left ring 15-1 and a right ring 15-2. The left ring 15-1 and the right ring 15-2 are respectively inserted into the protruding section of the escape wheel 7.

[0016] There are multiple sets of mechanical de-icing escapement devices B, and each set of mechanical de-icing escapement devices B is mounted on the long rod 3 from the free end of the long rod 3 through the ring 11 at the end of the fixed rod 8, and the adjacent mechanical de-icing escapement devices B are kept at a relative distance by the protruding section.

[0017] The blocking rod structure C includes a motor 19, a motor shaft extension ring 20, a protrusion 21, a main shaft 22, a wire 23, a main shaft wheel 24, a winding wheel 25, a winding shaft 26, a shell 27, a pulling wire 28, a telescopic tube 29, and a blocking rod 30. The motor 19 is connected to the piezoelectric device 4 through the wire 23. The output of the motor 19 drives the motor shaft extension ring 20 to rotate. The motor shaft extension ring 20 is slidably connected to the main shaft 22. The main shaft 22 is fixed with two symmetrical protrusions 21. The motor shaft extension ring 20 is provided with a slide groove. The protrusion 21 can slide in the slide groove. The outer wall of the protrusion 21 is fixed with a magnet sheet. The area corresponding to the motor 19 shell and the magnet sheet The domain fixes the electromagnet, which is powered by the piezoelectric device 4. The magnetism of the electromagnet when energized is opposite to that of the magnet sheet. The front end of the main shaft 22 is fixed with the main shaft wheel 24. When the main shaft wheel 24 contacts the winding wheel 25, it is frictionally connected. The winding wheel 25 fixes the winding shaft 26, and the winding shaft 26 winds the pulling wire 28. The main shaft wheel 24 and the winding wheel 25 are arranged in the outer shell 27. The outer shell 27 and the motor 19 are fixed on the outer wall of the protective cover 1. The telescopic tube 29 is a plurality of tubes with gradually changing diameters, and is blocked by the inner flange and the outer flange. The bottom of the tube with the smallest diameter of the telescopic tube 29 is fixedly connected to the stop rod 30, and the inside is connected to the bottom end of the pulling wire 28. When the pulling wire 28 is subjected to the pulling force transmitted by the motor, the telescopic tube 29 is pulled up step by step when the pulling wire 28 is subjected to the force and is in a retracted state. The blocking rod 30 does not block the mechanical de-icing escapement device B. When the pulling wire 28 is not subjected to the force transmitted by the motor, the telescopic tube 29 hangs freely and is in an extended state. The blocking rod 30 blocks the mechanical de-icing escapement device B.

[0018] When the motor 19 is energized, the electromagnet is also energized at the same time. The magnet sheet on the protrusion 21 is subjected to repulsive force, and the protrusion 21 slides, causing the main shaft 22 to extend forward a certain length. The main shaft wheel 24 is inserted into the round blind hole of the winding wheel 25. The friction transmission drives the winding shaft 26 to rotate, causing the pulling wire 28 to be wound. The lower end of the pulling wire 28 pulls the tube with the smallest diameter of the telescopic tube 29 to move upward. When the outer flange on it contacts the inner flange of the adjacent tube, it drives the tube to rise until all tubes except the tube with the largest diameter are lifted, and the blocking rod 30 is in a high position, releasing the blockage of the mechanical de-icing escapement device B. Mutually repelling permanent magnets are installed on the opposing sidewalls of the main shaft wheel 24 and the winding wheel 25. When the motor 19 and the electromagnet lose power, the repulsive force of the permanent magnets displaces the main shaft wheel 24, disengaging it from the winding wheel 25. The winding shaft 26 rotates autonomously, and the gravity of the telescopic tube 29 causes it to fall freely. The blocking rod 30 drops to a low position, blocking the mechanical de-icing escapement B. When the telescopic tube 29 is extended, the upper outer flange is blocked by the adjacent inner flange, preventing it from falling out. The repulsive force of the permanent magnets is smaller than the magnetic force of the electromagnet. When the electromagnet is energized and has magnetic force, it can overcome the repulsive force of the permanent magnets, causing the main shaft 22 to move forward and the main shaft wheel 24 and the winding wheel 25 to come into contact.

[0019] The protective cover 1 is a clamshell type protective cover, the upper sides of the two half shells are connected by a hinge, and the lower sides are fixed by a buckle.

[0020] The connecting piece between the protective cover 1 and the line spacer adopts a hook 2. A hook 2 is led out from the upper and lower ends on the same side of the protective cover 1. The rubber pad of the line spacer is embedded in a hanging ring, and the hook 2 is hung on the hanging ring.

[0021] Instructions for use: (1) The mechanical self-deicing device for transmission lines can be applied to split conductors with spacers installed at different voltage levels, with large spans and significant sag in overhead transmission lines. The line spacers rely on rubber pads to form a stable connection with the transmission conductors. Before the device is applied, two hanging rings are embedded on both sides of the rubber pads.

[0022] (2) The device's mechanical autonomous de-icing function utilizes the rotation of the escapement, and its forward movement utilizes its gravity. Due to the existence of the wire sag, the spacer is higher on one side and lower on the other side. Therefore, the device needs to be installed on the side where the spacer is at a low position. Taking the direction in the figure of this scheme as an example, the wire sag is on the right side of the device.

[0023] (3) When installing the device, first hang the hook 2 on the hanging ring. The protective cover 1 is now in the open state. Open the inner ring hinge 9 and the outer ring hinge 10 of the escape wheel 7 in the mechanical de-icing escapement device B, and put them on the wire to automatically close. Put the open ring 12 of the two fixing rods 8 on the protruding sections on both sides of the escape wheel 7, and put the closed ring 11 on the long rods 3 on the left and right sides. At this time, the main part of the mechanical de-icing escapement device B is supported in the protective cover 1. Next, install the escapement fork part B1, and put the left ring 15-1 and the right ring 15-2 on the protruding sections on both sides of the escape wheel 7. At this time, one set of mechanical de-icing escapement device B is installed. In this way, multiple sets of mechanical de-icing escapement devices B can be installed in the protective cover 1 in sequence.

[0024] (4) Since the protruding section of the escape wheel 7 has a certain length between each mechanical de-icing escapement B, a relative distance between adjacent mechanical de-icing escapements B can be maintained. At this time, since the oscillation rod 17 can be moved upward through the hole to a position close to the connecting shaft 18, the oscillation ball 16 and the oscillation rod 17 can be partially retracted in the mechanical de-icing escapement B, so that the buckle on the lower side of the protective cover 1 can be closed.

[0025] (5) Determine the number of mechanical de-icing escapements B based on the length of the transmission line and the rain and snow environment. Install all of them inside the protective cover 1 and snap the protective cover 1 closed. Lower the barrier structure C naturally to block the mechanical de-icing escapement B. The device is now installed.

[0026] (6) During the use of the device, the cantilever beam piezoelectric vibrator generates electricity continuously through the breeze vibration of the conductor in non-rainy or snowy weather, and the electrical energy is stored in the supercapacitor. When the conductor is covered with ice to a certain extent in rainy or snowy weather, the gravity of the ice causes the gravity lever 5 to press down and contact the piezoelectric device 4, triggering the supercapacitor to discharge. The released electrical energy drives the motor to move, and the barrier rod 30 is lifted. After the mechanical de-icing escapement device B is unobstructed, it slides along the arc direction of the conductor under gravity. The oscillating ball 16 and the oscillating rod 17 fall until the upper end of the oscillating rod 17 is stuck at the connecting shaft 18. The oscillating ball 16 starts to do pendulum motion at high altitude, driving the escapement fork 13 to move. The escapement wheel 7 starts to rotate, and the sharp serrations on its edge remove the ice on the conductor, and slides forward along the conductor under gravity, achieving the purpose of de-icing.

[0027] (7) When the gravity of the ice causes the gravity lever 5 to press down and contact the piezoelectric device 4, triggering the piezoelectric module to discharge, the connecting wire 6 is turned on. Since the wire is connected to the gravity lever 5, the conductive coating on its surface instantly heats up, quickly melting the ice on the surface of the gravity lever 5. The gravity lever 5 rebounds after being free of ice, and the contact with the piezoelectric device 4 is released. The blocking rod 30 descends and continues to block the other mechanical de-icing escapement devices B that have not yet separated from the protective cover 1; when the ice reaches the designed gravity again, the mechanical de-icing escapement device B is released to continue de-icing.

[0028] (8) This method can achieve timely mechanical autonomous de-icing. The gravity borne by the gravity lever 5 needs to be calculated and adjusted according to the actual installation environment of the device to ensure timely de-icing of the device and to ensure that there is no excessively thick ice layer on the conductor. There is no need to wait for the arrival of operation and maintenance personnel before handling the matter.

[0029] This method is simple to install, provides timely deicing, and is highly practical. However, its disadvantage is that the mechanical deicing escapement B will remain in position after reaching the lowest sag position of the conductor section, and maintenance personnel must wait for the rain or snow to pass before removing it with a drone. However, the mechanical deicing escapement B has a simple structure, and if made of materials such as hard plastic, it will be lightweight and will not burden line operation.

Claims

1. A mechanical autonomous deicing device for a power transmission line, characterized in that: The invention comprises a protective cover (1), a piezoelectric sensing device (A), a mechanical deicing escapement device (B), and a blocking rod structure (C). The protective cover (1) has a sag for the overhead transmission line and is connected to a plurality of line spacers. One end of the protective cover (1) is connected to the high-position line spacer by a connector to fix the position of the protective cover (1). The protective cover (1) wraps the transmission line therein. The piezoelectric sensing device (A) is fixed to the upper outer portion of the protective cover (1). The piezoelectric sensing device (A) includes a piezoelectric device (4) and a gravity lever (5). The piezoelectric device (4) includes a cantilever beam piezoelectric vibrator and a supercapacitor. The gravity lever (5) needs to be coated with a conductive coating. A connecting wire (6) of the piezoelectric device (4) is connected to the gravity lever (5). In the non-deicing state, the mechanical deicing escapement device (B) is located in the protective cover (1). The blocking rod structure (C) is used to block the mechanical deicing escapement device (B). The mechanical de-icing escapement device (B) comprises an escapement wheel (7), a fixed rod (8), and an escapement fork portion (B1). The escapement wheel (7) is a circular ring, and the inner circle edges of the circular rings on both sides are protruding from a part of the circular ring to form a protruding section. The top of the inner circle is an inner ring hinge (9) with an opening and closing function, and the top of the outer circle is an outer ring hinge (10) with an opening and closing function. The inner ring hinge (9) and the outer ring hinge (10) are used to sheath the mechanical de-icing escapement device (B) on the wire; the outer circle is provided with equidistant saw teeth, which are oblique triangles with sharp edges; A long rod (3) is fixed on each of the left and right sides of the interior of the protective cover (1), wherein the length of the long rod (3) is less than the length of the protective cover (1), one end of the long rod (3) is fixed to the protective cover (1), and the other end is a free hanging end, and the free hanging end is used to enable the mechanical de-icing escapement device (B) to slide out of the protective cover (1); There are two fixing rods (8), each of which has rings on both sides. One side is a closed ring (11) that is inserted into the long rod (3) from the free end of the long rod (3), and the other side is an open ring (12). The open ring (12) has a notch and is inserted into the protruding section of the escape wheel (7); The pallet fork portion (B1) comprises a pallet fork (13), a connecting rod (14), a collar (15), an oscillating ball (16), an oscillating rod (17), and a connecting shaft (18). The oscillating ball (16) is fixedly connected to the oscillating rod (17). The connecting shaft (18) is provided with a hole through which the oscillating rod (17) passes. When the oscillating rod (17) moves upward through the hole, it stops at the position where the oscillating ball (16) is close to the connecting shaft (18); when the oscillating rod (17) moves downward through the hole, it stops at the position where the upper end of the oscillating rod (17) is stuck on the connecting shaft (18). At this time, the relative positions of the pallet fork (13) and the oscillating rod (17) are fixed. When the oscillating ball (16) drives the oscillating rod (17) to perform a pendulum motion, the pallet fork (13) moves synchronously. The connecting rod (14) comprises two parts, left and right, which are respectively fixedly connected to the ring (15). The ring (15) has a notch. The left and right rings (15) are a left ring (15-1) and a right ring (15-2). The left ring (15-1) and the right ring (15-2) are respectively inserted into the protruding section of the escape wheel (7). There are multiple sets of mechanical de-icing escapement devices (B), and each set of mechanical de-icing escapement devices (B) is mounted on the long rod (3) from the free end of the long rod (3) through the ring (11) at the end of the fixed rod (8), and the adjacent mechanical de-icing escapement devices (B) are kept at a relative distance through the protruding section.

2. The transmission line mechanical autonomous deicing device according to claim 1, characterized in that: The blocking rod structure (C) comprises a motor (19), a motor shaft extension ring (20), a bump (21), a main shaft (22), a wire (23), a main shaft wheel (24), a winding wheel (25), a winding shaft (26), a housing (27), a pulling wire (28), a telescopic tube (29), and a blocking rod (30). The motor (19) is connected to the piezoelectric device (4) through the wire (23). The output of the motor (19) drives the motor shaft extension ring (20) to rotate. The shaft extension ring (20) is slidably connected to the main shaft (22), and the main shaft (22) is fixed with two symmetrical protrusions (21). The motor shaft extension ring (20) is provided with a slide groove, and the protrusion (21) can slide in the slide groove. The outer wall of the protrusion (21) is fixed with a magnet sheet. The motor (19) housing and the area corresponding to the magnet sheet are fixed with an electromagnet. The electromagnet is provided with electric energy by the piezoelectric device (4). The magnetism of the electromagnet is opposite to that of the magnet sheet when it is energized. The front end of the main shaft (22) is fixed with a main shaft wheel (24 ), the main shaft wheel (24) and the winding wheel (25) are frictionally connected when in contact, the winding wheel (25) fixes the winding shaft (26), the winding shaft (26) winds the pulling wire (28), the main shaft wheel (24) and the winding wheel (25) are arranged in the shell (27), the shell (27) and the motor (19) are fixed to the outer wall of the protective cover (1), the telescopic tube (29) is a plurality of tubes with gradually changing diameters, and is blocked by the inner flange and the outer flange. The diameter of the telescopic tube (29) is the largest. The bottom of the small tube is fixedly connected to the stopper (30) and the inside is connected to the bottom end of the pulling wire (28). When the pulling wire (28) is subjected to the pulling force transmitted by the motor, the telescopic tube (29) is pulled up step by step when the pulling wire (28) is subjected to the force and is in a contracted state. The stopper (30) does not block the mechanical deicing escapement device (B). When the pulling wire (28) is not subjected to the force transmitted by the motor, the telescopic tube (29) hangs freely and is in an extended state. The stopper (30) blocks the mechanical deicing escapement device (B).

3. The power transmission line mechanical autonomous deicing device according to claim 2, characterized in that: The blocking rod (30) is arc-shaped.

4. The transmission line mechanical autonomous deicing device according to claim 2, characterized in that: The uppermost end of the telescopic tube (29) protrudes outside the protective cover (1).

5. The transmission line mechanical autonomous deicing device according to claim 1, characterized in that: The protective cover (1) is a clamshell type protective cover, wherein the upper sides of the two half shells are connected by a hinge and the lower sides are fixed by a buckle.

6. The transmission line mechanical autonomous deicing device according to claim 1, characterized in that: The connecting piece between the protective cover (1) and the line spacer rod adopts a hook (2), one hook (2) is led out from the upper and lower ends on the same side of the protective cover (1), a hanging ring is embedded in the rubber pad of the line spacer rod, and the hook (2) is hung on the hanging ring.

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