A crane electric shock prevention fence

Abstract

This invention discloses an anti-crane electric shock fence, comprising a fence structure and an alarm structure disposed on the fence structure. The fence structure includes an upper ring body in the shape of a ring and a lower ring body disposed below the upper ring body. A plurality of fence soft strips are disposed between the upper ring body and the lower ring body. A soft strip rewinder for rewinding the fence soft strips is also provided on the upper ring body or the lower ring body. The invention also includes a pole climbing robot. The upper ring body is horizontally fixed on the pole climbing robot. The pole climbing robot is equipped with an audible and visual alarm and a central controller controlled and connected to the audible and visual alarm. An infrared sensor is provided on the pole climbing robot and electrically connected to the central controller. This invention, by combining the pole climbing robot with the fence structure, facilitates rapid fence installation and is suitable for various temporary construction uses. By equipping the pole climbing robot with an infrared sensor, it is possible to monitor and alert near power lines that cannot be monitored in traditional technologies.

Description

Technical Field

[0001] This invention relates to the technical field of construction safety equipment, and in particular to the technical field of crane electric shock prevention fences. Background Technology

[0002] A crane is a type of lifting and moving machinery widely used in ports, workshops, power plants, construction sites, and other places. The term "crane" is a general term for lifting machinery. The most common types are truck cranes, crawler cranes, and tire cranes. Cranes are used for lifting equipment, disaster relief, hoisting, and rescue operations. Crane working environments are diverse and complex. Often, various power lines are present, and these lines cannot be disconnected, requiring operation while the crane boom is energized. Since the crane boom is made of metal, there is a significant risk of electric shock if the boom or slings come into contact with power lines. Currently, guardrails are commonly used to warn workers and prevent accidental contact, but this method has limitations. Because power lines are suspended in the air, ground-based guardrails are not effective in preventing the boom from touching the power lines. Summary of the Invention

[0003] The purpose of this invention is to solve the problems in the prior art and to propose a crane electric shock prevention fence, which can improve the electric shock prevention performance at construction sites and prevent crane booms from accidentally touching power lines.

[0004] To achieve the above objectives, this invention proposes an anti-crane electric shock fence, comprising a fence structure and an alarm structure disposed on the fence structure. The fence structure includes an upper ring body in the shape of a ring and a lower ring body disposed below the upper ring body. A plurality of fence soft strips are disposed between the upper ring body and the lower ring body. The two ends of the fence soft strips are respectively disposed on the outer ring of the upper ring body and the lower ring body. The upper ring body or the lower ring body is also provided with a soft strip rewinder for winding the fence soft strips. The invention also includes a pole-climbing robot. The upper ring body is horizontally fixed on the pole-climbing robot. The pole-climbing robot is provided with an audible and visual alarm and a central controller controlled and connected to the audible and visual alarm. The pole-climbing robot is provided with an infrared sensor electrically connected to the central controller. The infrared sensor is oriented away from the pole-climbing robot. When the infrared sensor detects an object approaching, it controls the audible and visual alarm to emit an audible and visual alarm signal.

[0005] Preferably, the upper ring and the lower ring are each equipped with a plurality of ultrasonic radars. The ultrasonic radars on the upper ring are inclined downwards away from the center of the upper ring, and the ultrasonic radars on the lower ring are inclined upwards away from the center of the lower ring. The ultrasonic radars are electrically connected to the central controller. The central controller controls the audible and visual alarm to emit audible and visual alarm signals based on whether the ultrasonic radars detect an approaching object. The closer the object is to the ultrasonic radar, the higher the frequency of the audible and visual alarm signal.

[0006] Preferably, the pole-climbing robot includes a robot body and a vertical column mounted on the upper part of the robot body. A first trolley and a second trolley are slidably connected to the column. A first pole gripper and a second pole gripper are respectively provided on one side of the first and second trolleys for engaging with a utility pole. A third pole gripper is provided at the lower end of the robot body for engaging with the utility pole. The first trolley, the second trolley, the first pole gripper, the second pole gripper, and the third pole gripper are all electrically connected to the central controller.

[0007] Preferably, the first, second, and third pole grippers have the same structure, each including a pole gripper housing and a clamping strap. The pole gripper housing is equipped with an electric winding device. One end of the clamping strap is wound around the electric winding device. The pole gripper housing has a slot on one side for the clamping strap to pass through. The end of the clamping strap away from the electric winding device is equipped with a buckle. The side of the pole gripper housing away from the slot is equipped with a buckle that can be detachably connected to the buckle. Several pulleys are provided on the pole gripper housing and the side of the robot body near the utility pole.

[0008] Preferably, the clamping strap includes a steel strip and a flexible cloth strip wrapped around the steel strip, wherein the flexible cloth strip has a number of rubber anti-slip particles on the side surface near the utility pole.

[0009] Preferably, the first trolley and the second trolley have the same structure, both including a sliding sleeve fitted on the column. The sliding sleeve is provided with a plurality of rollers that abut against the column. A rack is provided on one side of the column along its length. The sliding sleeve is provided with a gear that meshes with the rack and a reduction motor for driving the gear to rotate. The reduction motor has a self-locking function.

[0010] Preferably, the anti-crane electric shock fences are used in pairs, and the infrared sensors are infrared through-beam sensors, including a transmitter and a receiver arranged opposite to each other. The transmitter and the receiver are respectively installed on the climbing robots of the two anti-crane electric shock fences used in pairs.

[0011] Preferably, the pole-climbing robot is provided with a bracket for fixing the infrared sensor. The bracket is U-shaped, with a U-shaped groove in the middle for the transmission line to pass through. The bracket has four fixed points arranged in a rectangular array, and each fixed point is provided with at least one infrared sensor. An electric pole for driving the bracket to rise and fall is vertically provided on the lower side of the bracket.

[0012] Preferably, the robot body has a curved surface on the side away from the utility pole, the lower end of the electric pole is fixedly mounted on the curved surface, the surface of the curved surface is provided with a plurality of arc-shaped slide rails, the electric pole is slidably connected to the arc-shaped slide rails via a sliding plate, an arc-shaped rack is provided between the arc-shaped slide rails and arranged parallel to them, the sliding plate is also provided with a second drive motor, and the rotating shaft of the second drive motor is provided with a drive gear adapted to the arc-shaped rack.

[0013] Preferably, the infrared sensor is fixedly connected to the fixed point via an electric pan-tilt unit.

[0014] Preferably, both the upper ring and the lower ring are provided with ring openings on one side for the power supply rod to pass through, and the ring openings are provided with sealing rods that can be detachably connected to them.

[0015] The beneficial effects of this invention, a crane electric shock prevention fence, are as follows: By combining a pole-climbing robot with a fence structure, this invention facilitates rapid fence installation and is suitable for various temporary construction applications. The pole-climbing robot can quickly install the fence structure on utility poles, thereby protecting the poles. By equipping the pole-climbing robot with an infrared sensor, when an object approaches, the infrared sensor can receive the infrared signal reflected by the object, thereby controlling an audible and visual alarm to emit an alarm signal, alerting nearby crane operators, thus improving safety and providing timely reminders to operators. It can also monitor and alert operators near power lines that are not monitored in traditional technologies.

[0016] The features and advantages of the present invention will be described in detail through embodiments and in conjunction with the accompanying drawings. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the main structure of a crane electric shock prevention fence according to the present invention.

[0018] Figure 2 This is a schematic diagram of the main view structure of a climbing robot for a crane-proof electric shock fence according to the present invention.

[0019] Figure 3 This is a side view schematic diagram of a crane-proof fence climbing robot according to the present invention.

[0020] Figure 4 This is a top view schematic diagram of the anti-crane electric shock fence of the present invention.

[0021] Figure 5 This is a schematic diagram of the main structure of the pulley and pole holder of the anti-crane electric shock fence of the present invention.

[0022] Figure 6 This is a schematic diagram of the structure of the anti-crane electric shock fence of the present invention during use.

[0023] in:

[0024] 1-Upper ring body; 2-Lower ring body; 3-Pole climbing robot; 4-Fence soft belt; 5-Soft belt rewinder; 6-Ultrasonic radar; 7-Audio-visual alarm; 8-Infrared sensor; 9-Bracket; 10-Electric lifting pole; 11-Electric pan-tilt head; 31-Robot body; 32-Column; 33-First trolley; 34-Second trolley; 35-First pole gripper; 36-Second pole gripper; 37-Third pole gripper; 321-Rack; 331-Sliding sleeve; 332-Gear motor; 351-Pole gripper housing; 352-Holding belt; 3511-Slot; 3512-Grip; 3513-Pulley; 3521-Steel belt; 3522-Flexible fabric belt; 91-Fixing point; 101-Arc-shaped slide rail; 102-Arc-shaped rack; 103-Slide plate; 104-Second drive motor. Implementation

[0025] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0026] In the description of this invention, it should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to or indirectly connected to the other element.

[0027] In the description of this invention, it should be noted that the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this invention is in use. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified. "Several" means one or more, unless otherwise explicitly specified.

[0028] In the description of this invention, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. Example

[0029] See Figures 1-6 This invention discloses an anti-crane electric shock fence, comprising a fence structure and an alarm structure disposed on the fence structure. The fence structure includes an upper ring body 1 in the shape of a ring and a lower ring body 2 disposed below the upper ring body 1. A plurality of fence soft strips 4 are disposed between the upper ring body 1 and the lower ring body 2. The two ends of the fence soft strips 4 are respectively disposed on the outer rings of the upper ring body 1 and the lower ring body 2. The lower ring body 2 is also provided with a soft strip rewinder 5 for rewinding the fence soft strips 4. The invention also includes a pole climbing robot 3. The upper ring body 1 is horizontally fixed on the pole climbing robot 3. The pole climbing robot 3 is provided with an audible and visual alarm 7 and a central controller controlled and connected to the audible and visual alarm 7. The pole climbing robot 3 is provided with an infrared sensor 8 electrically connected to the central controller. The infrared sensor 8 is arranged in a direction away from the pole climbing robot 3. When the infrared sensor 8 detects an object approaching, it controls the audible and visual alarm 7 to emit an audible and visual alarm signal. In this embodiment, the infrared sensor 8 is an infrared proximity sensor. When an object approaches, the infrared sensor 8 can receive the infrared signal reflected by the object, thereby controlling the audible and visual alarm 7 to emit an audible and visual alarm signal to remind nearby crane operators. In this embodiment, by combining the pole-climbing robot 3 with the fence structure, it is convenient to quickly lay the fence, suitable for various temporary construction uses. In use, the upper ring 1 and the lower ring 2 are fitted onto the utility pole where construction is needed, and the pole-climbing robot 3 is placed on the utility pole. The pole-climbing robot 3 is controlled to climb up the utility pole to a certain height until the infrared sensor 8 moves to the lower side of the power line on the utility pole, and the upper ring... Body 1 lifts the end of the fence strap 4 together, while the lower ring body 2 remains flat on the ground under the action of gravity. The fence strap 4 unfolds to surround and protect the utility pole. Infrared sensor 8 monitors whether any object is approaching the power line. When the crane boom moves close to the underside of the power line, the infrared sensor 8 can detect the boom and transmit the signal to the central controller. The central controller controls the audible and visual alarm 7 to issue an audible and visual alarm, thereby reminding the driver and staff that the crane boom is close to the power line and there is danger, thus improving safety and timely reminding the operators. It can also monitor and remind people near power lines that cannot be monitored in traditional technology. Example

[0030] See Figure 1 , Figure 2 and Figure 6 The upper ring 1 and the lower ring 2 are each equipped with a plurality of ultrasonic radars 6. The ultrasonic radars 6 on the upper ring 1 are inclined downwards away from the center of the upper ring 1, and the ultrasonic radars 6 on the lower ring 2 are inclined upwards away from the center of the lower ring 2. The ultrasonic radars 6 are electrically connected to the central controller. The central controller controls the audible and visual alarm 7 to emit audible and visual alarm signals based on whether the ultrasonic radars 6 detect an approaching object. The closer the object is to the ultrasonic radar 6, the higher the frequency of the audible and visual alarm signal. When the upper ring 1, lower ring 2, and the fence strip 4 are installed outside the utility pole, the ultrasonic radars 6 are used to further protect the utility pole. When the boom approaches the utility pole, the ultrasonic radars 6 can detect the approach of the boom, thereby alerting the operator. It can cooperate with the infrared sensor 8 to further improve the performance of preventing crane and worker electric shock. Example

[0031] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The pole-climbing robot 3 includes a robot body 31 and a column 32 vertically mounted on the upper end of the robot body 31. The column 32 is fitted with a first trolley 33 and a second trolley 34 that are slidably connected to it. The first trolley 33 and the second trolley 34 are respectively provided with a first pole gripper 35 and a second pole gripper 36 for cooperating with the utility pole on one side. The lower end of the robot body 31 is provided with a third pole gripper 37 for cooperating with the utility pole. The first trolley 33, the second trolley 34, the first pole gripper 35, the second pole gripper 36, and the third pole gripper 37 are all electrically connected to the central controller. This embodiment discloses a novel pole-climbing robot 3 structure. The pole-climbing robot 3 achieves pole climbing through the cooperation of three pole grippers and two pulleys, improving the stability of the pole climbing process, making it less prone to loosening or deviation, and improving safety. During the pole climbing process, the first pole gripper 35, the second pole gripper 36, and the third pole gripper 37 are all sleeved on the utility pole, with the third pole gripper 37 maintaining a fixed position. When climbing, the first pole gripper 35 first releases the utility pole, at which point the second pole gripper 36 and the third pole gripper 37 are both in a state of gripping the utility pole. The first pulley 33 drives the first pole gripper 35 to slide to the top of the column 32. Then, the first pole holder 35 grips the utility pole, followed by the second pole holder 36 releasing the pole. The second trolley 34 slides to the underside of the first trolley 33, then the second pole holder 36 grips the utility pole again, and then the third pole holder 37 releases the pole. The first trolley 33 and the second trolley 34 start synchronously, driving the column 32 and the robot body 31 to rise until the second trolley 34 approaches the robot body 31. Repeating the above steps controls the lifting and lowering of the robot body 31. During the lifting and lowering process of the robot body 31, two pole holders always grip the utility pole to improve stability and prevent it from loosening and falling off during the lifting and lowering process.

[0032] See Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5The first pole grabber 35, the second pole grabber 36, and the third pole grabber 37 have the same structure, each including a pole grabber housing 351 and a clamping strap 352. The pole grabber housing 351 is equipped with an electric winding device. One end of the clamping strap 352 is wound around the electric winding device. The pole grabber housing 351 has a slot 3511 on one side for the clamping strap 352 to pass through. The end of the clamping strap 352 away from the electric winding device is equipped with a buckle 3524. The side of the pole grabber housing 351 away from the slot 3511 is equipped with a bayonet 3512 that can be detachably connected to the buckle 3524. The pole grabber housing 351 and the robot body 31 are equipped with a number of pulleys 3513 on the side near the utility pole. The flexible clamping strap 352, in conjunction with an electric retractor, achieves a tight grip on the utility pole. The structure is simple and low-cost, yet provides better stability after gripping. The clamping strap 352, together with the pole holder housing 351, encircles the utility pole, thereby improving stability. One end of the clamping strap 352 is detachably connected to the clamp 3512 of the pole holder housing 351 via a buckle 3524, making it easy to fix to the utility pole.

[0033] See Figure 5 The clamping strap 352 includes a steel strap 3521 and a flexible fabric strap 3522 wrapped around the steel strap 3521. The flexible fabric strap 353 has several rubber anti-slip particles on its surface near the utility pole. The steel strap 3521 provides support, allowing the clamping strap 352 to remain horizontally extended, preventing excessive contact between the clamping strap 352 and the utility pole during lifting and lowering, thus avoiding wear. The rubber anti-slip particles improve anti-slip performance.

[0034] See Figure 1 , Figure 2 and Figure 5 The first trolley 33 and the second trolley 34 have the same structure, both including a sliding sleeve 331 sleeved on the column 32. The sliding sleeve 331 contains several rollers that abut against the column 32. A rack 321 is provided on one side of the column 32 along its length. The sliding sleeve 331 contains a gear 322 that meshes with the rack 321 and a reduction motor 332 for driving the gear 322 to rotate. The reduction motor 332 has a self-locking function. By driving the gear 322 to rotate through the reduction motor 332, it cooperates with the rack 321 to raise and lower the sliding sleeve, making the raising and lowering operation more convenient and stable. Example

[0035] See Figure 6The crane electric shock prevention fences are used in pairs. The infrared sensor 8 is an infrared through-beam sensor, including a transmitter 81 and a receiver 82 arranged opposite each other. The transmitter 81 and the receiver 82 are respectively installed on the climbing robots 3 of the two crane electric shock prevention fences used in pairs. The two crane electric shock prevention fences are respectively installed on two adjacent utility poles, and the infrared sensors 8 of the two crane electric shock prevention fences are arranged opposite each other. The transmitter 81 and the receiver 82 cooperate with each other. When the infrared light between the transmitter 81 and the receiver 82 is blocked, an audible and visual alarm can be issued immediately to remind the operator. The infrared through-beam sensor is suitable for monitoring and protecting the wires between two utility poles with a large span.

[0036] See Figure 1 , Figure 2 and Figure 3 The pole-climbing robot 3 is equipped with a bracket 9 for fixing the infrared sensor 8. The bracket 9 is U-shaped, with a U-shaped groove in the middle for the power cable to pass through. The bracket 9 has four fixed points 91 arranged in a rectangular array, each fixed point 91 having at least one infrared sensor 8. An electric lifting rod 10 is vertically mounted on the lower side of the bracket 9 to drive its lifting and lowering. In use, the four fixed points 91 are located in the four directions (up, down, left, and right) of the power cable, allowing simultaneous monitoring in all four directions, reducing blind spots, and ensuring that the crane can detect the sensor regardless of which direction it approaches.

[0037] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The robot body 31 has a curved surface on the side away from the utility pole. The lower end of the electric lifting rod 10 is fixed to the curved surface. The curved surface has several arc-shaped slide rails 101. The electric lifting rod 10 is slidably connected to the arc-shaped slide rails 101 via a sliding plate 103. Arc-shaped racks 102 are arranged parallel to and opposite to the arc-shaped slide rails 101. A second drive motor 104 is also provided on the sliding plate 103. The rotating shaft of the second drive motor 104 has a drive gear adapted to the arc-shaped racks 102. This facilitates adjustment of the position and orientation of the infrared sensor 8.

[0038] See Figure 1 , Figure 2 , Figure 3 and Figure 4 The infrared sensor 8 is fixedly connected to the fixed point 91 via a motorized pan-tilt head 11. The motorized pan-tilt head 11 has horizontal and vertical rotation adjustment functions, which facilitates fine adjustment of the orientation of the infrared sensor 8, allows for mutual firing of the infrared sensors 8 on both sides, and enables individual adjustment of each infrared sensor 8 to adapt to various working environments.

[0039] See Figure 4 Both the upper ring 1 and the lower ring 2 have an opening 12 on one side for the power line pole to pass through. Each opening 12 has a sealing stop 13 that can be detachably connected to it. This facilitates the fitting of the upper ring 1 and the lower ring 2 onto the power pole, allowing for easy installation and disassembly.

[0040] Working process of this invention:

[0041] This invention relates to a crane electric shock prevention fence. During operation, the upper ring 1 and lower ring 2 are fitted onto the utility pole where construction is needed. A pole-climbing robot 3 is placed on the pole and controlled to climb to a certain height until the infrared sensor 8 moves to the underside of the power line. The upper ring 1 then lifts the end of the fence strap 4, while the lower ring 2 remains flat on the ground under gravity. The fence strap 4 unfolds to enclose and protect the utility pole. The infrared sensor 8 monitors for objects approaching the power line. When the crane boom moves close to the underside of the power line, the infrared sensor 8 detects the boom and transmits the signal to the central controller. The central controller then activates the audible and visual alarm 7 to issue an alarm, alerting the driver and workers that the crane boom is near the power line and posing a danger. This improves safety and provides timely warnings to operators. It can also monitor and alert operators near power lines that are not detectable in traditional technologies.

[0042] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the existing technology. The internal components of the electric slide rail, cylinder, welding machine, electric telescopic rod and controller all adopt conventional models in the existing technology, and their internal structure belongs to the existing technology structure. Workers can complete the normal operation of them according to the existing technical manual. In addition, the circuit connection adopts the conventional connection method in the existing technology, and will not be described in detail here.

[0043] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this invention. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this invention, or equivalent structural or procedural transformations made using the description and drawings of this invention, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this invention.

Claims

1. A crane electric shock prevention fence, comprising a fence structure and an alarm structure disposed on the fence structure, characterized in that: The fence structure includes an upper ring body (1) in the shape of a ring and a lower ring body (2) located below the upper ring body (1). A plurality of fence soft strips (4) are provided between the upper ring body (1) and the lower ring body (2). The two ends of the fence soft strips (4) are respectively located on the outer ring of the upper ring body (1) and the lower ring body (2). The upper ring body (1) or the lower ring body (2) is also provided with a soft strip rewinder (5) for winding the fence soft strips (4). The structure also includes a pole climbing robot (3). The upper ring body (1) is horizontally fixed on the pole climbing robot (3). The pole climbing robot (3) is provided with an audible and visual alarm (7) and a sound and light alarm (7). The light alarm (7) controls the central controller connected to it. The pole climbing robot (3) is equipped with an infrared sensor (8) electrically connected to the central controller. The infrared sensor (8) is set in a direction away from the pole climbing robot (3). When the infrared sensor (8) detects an object approaching, it controls the light alarm (7) to emit a light alarm signal. The pole climbing robot (3) includes a robot body (31) and a column (32) vertically set on the upper end of the robot body (31). The column (32) is fitted with a first trolley (33) and a second trolley (34) that are slidably connected to it. The first trolley (33) and the second trolley (34) are respectively provided on one side for cooperating with the utility pole. The lower end of the robot body (31) is provided with a third trolley (37) for cooperating with the utility pole. The first trolley (33), the second trolley (34), the first trolley (35), the second trolley (36), and the third trolley (37) are all electrically connected to the central controller. The first trolley (35), the second trolley (36), and the third trolley (37) have the same structure, each including a trolley housing (351) and a clamping strap (352). (351) is equipped with an electric winding device. One end of the clamping strap (352) is wound around the electric winding device. The clamping device housing (351) has a slot (3511) on one side for the clamping strap (352) to pass through. The end of the clamping strap (352) away from the electric winding device is provided with a buckle (3524). The clamping device housing (351) is provided with a bayonet (3512) on the side away from the slot (3511) that is detachably connected to the buckle (3524). The clamping device housing (351) and the robot body (31) are provided with several pulleys (3513) on the side near the utility pole.The anti-crane electric shock fences are used in pairs. The infrared sensor (8) is an infrared through-beam sensor, including a transmitter (81) and a receiver (82) arranged opposite to each other. The transmitter (81) and the receiver (82) are respectively located on the climbing robots (3) of the two anti-crane electric shock fences used in pairs. Both the upper ring (1) and the lower ring (2) have ring openings (12) on one side for the power line pole to pass through. The ring openings (12) are provided with sealing bars (13) that are detachably connected to them.

2. The crane electric shock prevention fence as described in claim 1, characterized in that: The upper ring (1) and the lower ring (2) are respectively provided with a plurality of ultrasonic radars (6). The ultrasonic radars (6) on the upper ring (1) are inclined downwards away from the center of the upper ring (1), and the ultrasonic radars (6) on the lower ring (2) are inclined upwards away from the center of the lower ring (2). The ultrasonic radars (6) are electrically connected to the central controller. The central controller controls the sound and light alarm (7) to emit sound and light alarm signals according to whether the ultrasonic radar (6) detects that an object is approaching. The closer the object is to the ultrasonic radar (6), the higher the frequency of the sound and light alarm signal.

3. The crane electric shock prevention fence as described in claim 1, characterized in that: The clamping strap (352) includes a steel strip (3521) and a flexible cloth strip (3522) that wraps around the steel strip (3521). The flexible cloth strip (3522) has several rubber anti-slip particles on the side surface near the utility pole.

4. The crane electric shock prevention fence as described in claim 1, characterized in that: The first trolley (33) and the second trolley (34) have the same structure, both including a sliding sleeve (331) sleeved on the column (32). The sliding sleeve (331) is provided with a plurality of rollers that abut against the column (32). The column (32) is provided with a rack (321) arranged along its length on one side. The sliding sleeve (331) is provided with a gear that meshes with the rack (321) and a reduction motor (332) for driving the gear to rotate. The reduction motor (332) has a self-locking function.

5. The crane electric shock prevention fence as described in claim 1, characterized in that: The pole-climbing robot (3) is provided with a bracket (9) for fixing the infrared sensor (8). The bracket (9) is U-shaped, with a U-shaped groove in the middle for the transmission line to pass through. The bracket (9) is provided with four fixed points (91) arranged in a rectangular array. Each fixed point (91) is provided with at least one infrared sensor (8). An electric lifting rod (10) for driving the bracket (9) to rise and fall is provided vertically on the lower side of the bracket (9).

6. The crane electric shock prevention fence as described in claim 5, characterized in that: The robot body (31) has a curved surface on the side away from the utility pole. The lower end of the electric lifting rod (10) is fixed on the curved surface. The surface of the curved surface is provided with several arc-shaped slide rails (101). The electric lifting rod (10) is slidably connected to the arc-shaped slide rails (101) through a slide plate (103). There are arc-shaped racks (102) arranged parallel to each other between the arc-shaped slide rails (101). The slide plate (103) is also provided with a second drive motor (104). The rotating shaft of the second drive motor (104) is provided with a drive gear adapted to the arc-shaped rack (102).

7. The crane electric shock prevention fence as described in claim 5, characterized in that: The infrared sensor (8) is fixedly connected to the fixed point (91) via an electric gimbal (11).

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