A low-headroom telescopic power early warning and protection trolley

Abstract

This utility model discloses a low-headroom telescopic power early warning and protection trolley for safety protection during construction under high-voltage lines. The trolley base integrates wheels and a drive unit, allowing it to move autonomously to the work area. The column lifting system adjusts the height via hydraulic cylinders, and the boom system consists of a boom platform, a protective arm, and an insulating shielding cloth. The protective arm can be folded and unfolded to adapt to different high-voltage line environments. The trolley is equipped with a high-voltage distance sensor and a linkage alarm to monitor the distance to the high-voltage line in real time. When the distance falls below the safety threshold, an audible and visual alarm is triggered, and the power source is cut off, effectively ensuring construction safety, reducing the risks of construction under high-voltage lines, replacing traditional fixed protective frames, and reducing workload and investment.

Description

Technical Field

[0001] This utility model relates to the field of safety protection during construction under high-voltage lines, specifically to a low-headroom telescopic power early warning and protection trolley. Background Technology

[0002] In areas where transportation infrastructure such as roads and bridges are constructed, various high-voltage overhead lines are often present. The presence of low-headroom high-voltage overhead lines, in particular, inevitably affects the safety of ground construction. When constructing under high-voltage lines, ensuring adequate clearance is paramount; the minimum vertical safety distance between construction equipment and the high-voltage lines must meet the protection requirements of the power facilities. Therefore, in engineering practice, height restriction guards are often installed under high-voltage lines to ensure absolute construction safety. Conventional height restriction guards often employ colored nylon rope and netting structures or full-coverage height restriction guards. The main drawback of these guards is that they all use fixed foundations, requiring erection and dismantling at each location, resulting in a large workload and significant investment. Utility Model Content

[0003] This utility model aims to propose a low-headroom telescopic power early warning and protection trolley. Through its independently movable platform base, foldable protective arm, extendable shielding, and distance-sensing intelligent early warning system, it can ensure a safe distance between construction work and high-voltage lines, preventing discharge. The entire protection trolley can be operated both self-propelled and remotely, and its structural system exhibits good stability, coordination, and aesthetic appeal. This telescopic power early warning and protection trolley includes:

[0004] The trolley base includes a trolley frame, traveling wheels located at the bottom of the trolley frame, and a traveling drive device for driving the trolley base to travel.

[0005] A column lifting system is installed on a trolley base. The column lifting system includes multiple liftable column components. Each liftable column component includes an outer column, an inner column that is liftably installed inside the outer column, and a hydraulic cylinder that drives the inner column to lift.

[0006] The boom system is located at the top of the column lifting system. The boom system includes a boom platform connected to the top of the inner column, multiple protective arms movably connected to the boom platform, and an extendable shield covering the protective arms. The protective arms can switch between a folded state and an extended state. When they are in the folded state, they are close to the boom platform. When they are in the extended state, they are extended outward relative to the boom platform.

[0007] In some embodiments of this utility model, the boom system further includes a control device, the trolley is equipped with a high-voltage electric distance sensor, and the high-voltage electric distance sensor is connected to the control device.

[0008] In some embodiments of this utility model, the boom extension system further includes a linkage alarm. The high-voltage distance sensor monitors the distance to the high-voltage line in real time. When the distance is lower than the safety threshold, the linkage alarm sounds and lights and cuts off the power source of the equipment.

[0009] In some embodiments of this utility model, the plurality of protective arms include two outer arms and two inner arms. The two outer arms and two inner arms are symmetrically arranged front and back, and the outer arms and inner arms located on the same side in the left and right direction are joined together in the folded state.

[0010] In some embodiments of this utility model, the protective arm is rotatably connected to the extension arm platform via a pivot, and the protective arm can freely switch between a folded state and an extended state via an automatic extension arm device.

[0011] In some embodiments of this utility model, the trolley base consists of four 16-inch heavy-duty wheels and a square tube frame, and the liftable column assembly is constructed by the square tube columns.

[0012] In some embodiments of this utility model, the extended arm platform is constructed using a square tube frame.

[0013] In some embodiments of this invention, the extendable shielding material is made of insulating shielding cloth.

[0014] In some embodiments of this utility model, a safety warning guardrail is provided around the top of the trolley base.

[0015] In some embodiments of this utility model, the outer arm is extended first on one side, followed by the inner arm, and the insulating shielding cloth is extended and retracted simultaneously on both sides.

[0016] This utility model provides a trolley base integrating wheels and a drive device, allowing it to be moved to any low-headroom high-voltage line work area, replacing fixed protective frames and reducing repetitive erection and dismantling work. The height is adjustable via a hydraulic lifting system, and with the extendable protective arm, it dynamically matches different high-voltage line heights and spans. A high-voltage distance sensor monitors in real time; when the distance is insufficient, it triggers an alarm with audible and visual warnings and cuts off power to prevent electric shock accidents. Attached Figure Description

[0017] Figure 1 This is a structural diagram of the protective trolley when it is deployed;

[0018] Figure 2 This is a side view of the protective trolley when it is deployed;

[0019] 1. Traveling wheels, 2. Trolley frame, 3. Travel drive device, 4. Square tube column, 5. Hydraulic cylinder, 6. Column crossbar, 7. Extending arm platform, 8. Outer arm, 9. Inner arm, 10. Automatic extending arm device, 11. Insulating shielding cloth, 12. Cable storage area, 13. Safety warning fence, 14. Control device, 15. Remote controller, 16. Alarm, 17. High voltage distance sensor. Detailed Implementation

[0020] The present invention or its technical solution will be further described in detail below through specific embodiments and in conjunction with the accompanying drawings.

[0021] Please see Figure 1 and Figure 2 This embodiment provides a telescopic power early warning and protection trolley, which includes a trolley base, a column lifting system, and an arm extension system. The trolley base includes a trolley frame 2, wheels 1 mounted at the bottom of the trolley frame 2, and a driving device 3 for driving the trolley base. The driving device 3 is integrated into one side frame of the trolley base and is mechanically connected to the wheels 1. The trolley's forward, backward, and turning movements can be controlled via a remote controller 15. Compared to existing fixed height restriction frames, this self-propelled design allows the equipment to be flexibly moved to different construction areas, significantly reducing the amount of erection and dismantling work. The column lifting system is mounted on the trolley base. The column lifting system includes multiple liftable column assemblies, each of which includes an outer column, an inner column that is liftably mounted inside the outer column, and a hydraulic cylinder 5 that drives the inner column to lift. The boom system is located at the top of the column lifting system. The boom system includes a boom platform 7 connected to the top of the inner column, multiple protective arms that are movably connected to the boom platform 7, and an extendable shield covering the protective arms. The protective arms can switch between a folded state and an extended state. When they are folded, they are close to the boom platform 7. When they are extended, they are extended outward relative to the boom platform 7.

[0022] Optionally, the hydraulic cylinder 5 of the column lifting system can be height adjusted (maximum height up to 6500mm), and the step-folding structure of the boom system can be width adjusted (maximum extension on one side up to 6000mm), which can adapt to the needs of different clearance heights and construction ranges, and overcome the limitations of the fixed size of existing fixed height restriction frames.

[0023] In some embodiments of this utility model, the boom extension system further includes a control device 14, and the trolley is equipped with a high-voltage distance sensor 17, which is connected to the control device 14. A high-voltage distance sensor 17 is installed on the top of the boom platform 7 and is electrically connected to the control device 14. The high-voltage distance sensor 17 monitors the vertical distance to the high-voltage line in real time. When the distance is lower than a safety threshold, the control device 14 triggers an alarm 16 to issue an audible and visual alarm, and simultaneously cuts off the power source of the walking drive device 3, the hydraulic cylinder 5, and the automatic boom extension device 10, forcing the equipment to stop operating. This linkage control mechanism significantly improves the timeliness and reliability of safety warnings compared to existing protection methods that rely solely on manual monitoring. Furthermore, the boom extension system also includes a linkage alarm 16. The high-voltage distance sensor 17 monitors the distance to the high-voltage line in real time, and when the distance is lower than a safety threshold, the linkage alarm 16 issues an audible and visual alarm and cuts off the equipment's power source.

[0024] In some examples, the multiple protective arms include two outer arms 8 and two inner arms 9, which are symmetrically arranged front to back. The outer arms 8 and inner arms 9 on the same side in the left-right direction are joined together in the folded state. The protective arms are rotatably connected to the extension platform 7 via a pivot, and the folding / unfolding switching is achieved through an automatic extension device. The automatic extension device employs a worm gear mechanism. This mechanism includes a motor, a worm, a worm wheel, and a drive shaft. The motor is fixed within the frame of the extension platform 7, and its output shaft is connected to the worm. The worm meshes with the worm wheel, and the worm wheel is connected to the pivot of the protective arm via the drive shaft. The motor drives the worm to rotate, which in turn drives the worm wheel to rotate, thereby synchronously controlling the unfolding angle of the protective arm through the drive shaft. The self-locking characteristic of the worm gear prevents the protective arm from accidentally folding during construction, achieving the switching between the folded and unfolded states. Specifically, the four protective arms include two outer arms 8 and two inner arms 9, symmetrically distributed front to back. Furthermore, the protective arm is controlled by the remote controller 15 to switch between folded and extended states: in the folded state, the outer arm 8 and the inner arm 9 move together in the left-right direction and approach the extension platform 7; in the extended state, the outer arm 8 first rotates outward to a horizontal position, and then the inner arm 9 rotates outward to be flush with the outer arm 8, with both sides simultaneously completing the unfolding and retraction of the insulating shielding cloth 11. This step-by-step unfolding design avoids movement interference between the protective arms and is more flexible than the existing fixed protective frame overall construction method.

[0025] Specifically, the trolley base consists of four 16-inch heavy-duty wheels (i.e., traveling wheels 1) and a square tube frame, forming the trolley frame 2. The liftable column assembly is constructed using square tube columns 4. The extended arm platform 7 uses a square tube frame, which is bolted to the top of the inner column, serving as the installation base for the protective arm. The square tube frame is connected by inter-column crossbars 6, and adjacent square tube columns 4 are connected by inter-column crossbars 6, forming a stable rectangular frame structure. The inter-column crossbars 6 use detachable bolt connections, which enhances the stability of the columns and facilitates quick disassembly during transportation. Each square tube column 4 has a 180mm×180mm square tube fitted inside as an inner column, and the inner column and the square tube column 4 are fitted with a clearance to achieve lifting guidance. The bottom of the cylinder 5 is hinged to the bottom of the square tube column 4, and the top of the piston rod is hinged to the top of the inner column. The lifting action of the inner column is achieved through hydraulic drive, with a lifting stroke of up to 2500mm, solving the defect of the existing fixed height restriction frame that cannot be adjusted in height.

[0026] Optionally, the extended shielding material is made of insulating shielding cloth 11. The insulating shielding cloth 11 is made of high-strength insulating material and is connected to the surface of the protective arm by Velcro, which can achieve quick assembly and disassembly, and can form a continuous shielding surface when extended to block the direct contact path between the construction equipment and the high-voltage line.

[0027] For example, the trolley base consists of four 16-inch heavy-duty wheels (i.e., traveling wheels 1) and a 200mm×200mm square tube frame, forming the trolley frame 2. The trolley base is 1000mm high, 2200mm wide, and 6000mm long. Four 200mm×200mm square tube columns 4, corresponding to lifting 180mm×180mm square tubes, and four sets of hydraulic cylinders 5 are installed on the trolley base (above the heavy-duty wheels), allowing for a lifting height of 2500mm. An extension platform 7 is installed on top of the columns, using a 200mm×200mm square tube frame. An extension system is installed on top of the frame, and the protective trolley extension arm uses a 60mm×80mm square tube mesh frame with a mesh spacing of 1500mm. The extended shielding uses insulating shielding cloth 11, and a high-voltage distance sensing early warning device 14 is installed on the trolley top. The overall basic height of the trolley base is 4000mm, which can be raised to 6500mm hydraulically. It can be extended to a width of 6000mm on one side and 12000mm on both sides, and can be used by extending it to one side.

[0028] The telescopic power early warning and protection trolley is a fully mobile unit that can be remotely controlled to move forward and backward. The upper part rises and falls, with all four columns rising and falling synchronously. When extending the arms, the outer arm 8 is extended first on one side via the remote controller 15, followed by the inner arm 9, and then the insulating shielding cloth 11 is simultaneously extended and retracted on both sides. A safety warning guardrail 13 is installed around the top of the trolley base, with a cable management area 12 on one short side to store power and control cables, preventing cable tangling from affecting equipment operation. This is a targeted improvement to address the problem of messy cables in existing equipment. Various safety warning signs and operating instructions are also included.

[0029] The insulating shielding cloth 11 should not be deployed during windy weather. When the equipment is moved, its boom extended, or the insulating shielding cloth 11 is deployed or retracted, no one is allowed to stand under the protective trolley.

[0030] In the description of this specification, the references to terms such as "some embodiments," "some implementations," and "examples" indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

Claims

1. A low-clearance telescopic power warning guard trolley, characterized in that, The vehicle includes: The trolley base includes a trolley frame, traveling wheels located at the bottom of the trolley frame, and a traveling drive device for driving the trolley base to travel. A column lifting system is installed on a trolley base. The column lifting system includes multiple liftable column components. Each liftable column component includes an outer column, an inner column that is liftably installed inside the outer column, and a hydraulic cylinder that drives the inner column to lift. The boom system is located at the top of the column lifting system. The boom system includes a boom platform connected to the top of the inner column, multiple protective arms movably connected to the boom platform, and an extendable shield covering the protective arms. The protective arms can switch between a folded state and an extended state. When they are in the folded state, they are close to the boom platform. When they are in the extended state, they are extended outward relative to the boom platform.

2. The low-clearance telescoping power warning barricade cart of claim 1, wherein, The boom extension system also includes a control device, and the trolley is equipped with a high-voltage electric distance sensor, which is connected to the control device.

3. The low-clearance telescoping power warning barricade cart of claim 2, wherein, The boom extension system also includes a linkage alarm. The high-voltage distance sensor monitors the distance to the high-voltage line in real time. When the distance is lower than the safety threshold, the linkage alarm will sound an audible and visual alarm and cut off the power source of the equipment.

4. The low-headroom telescopic power early warning and protection trolley according to claim 2, characterized in that, The plurality of protective arms include two outer arms and two inner arms. The two outer arms and two inner arms are arranged symmetrically front to back. When the outer arms and inner arms located on the same side in the left-right direction are folded together, they are joined together.

5. The low-clearance telescoping power warning barricade cart of claim 4, wherein, The protective arm is rotatably connected to the extension arm platform via a pivot, and the protective arm can freely switch between a folded state and an extended state via an automatic extension arm device.

6. The low-clearance telescoping power warning barricade cart of claim 1, wherein, The trolley base consists of four 16-inch heavy-duty wheels and a square tube frame, and the liftable column assembly is constructed using square tube columns.

7. The low-clearance telescoping power warning barricade cart of claim 6, wherein, The aforementioned extendable platform is constructed using a square tube frame.

8. The low-clearance telescoping power warning barricade cart of claim 1, wherein, The extended shielding material uses insulating shielding cloth.

9. The low-clearance telescoping power warning barricade cart of claim 1, wherein, Safety warning railings are installed around the top of the trolley base.

10. The low-clearance telescoping power warning barricade cart of claim 4, wherein, First extend the outer arm on one side, then extend the inner arm; simultaneously extend and retract the insulating shielding cloth on both sides.

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