Blocking device used in cooperation with movable umbrella-shaped crossing frame

Abstract

The utility model relates to a net blocking device used in cooperation with a movable umbrella-shaped crossing frame and a using method, and belongs to the technical field of power transmission line crossing construction mechanical equipment. According to the utility model, through the combination of the mobile umbrella-shaped crossing frame, the front and back blocking device, the crossing frame control system and the crossing frame remote operation remote controller, the live-line front and back blocking function of a spanned line is realized, the protection range of the mobile umbrella-shaped crossing frame is expanded, an operator does not need to erect the crossing frame and a high-altitude blocking net at a high altitude, and the working efficiency is improved. The electric shock risk and the high-altitude operation risk of personnel are reduced, the device is particularly suitable for protecting a live line during crossing construction without power failure, and crossing operation without power failure is realized. And meanwhile, the problem that serious safety accidents such as electric shock are caused due to the fact that wires are likely to be thrown back to make contact with a lower live line when falling due to wire breakage during existing non-power-cut crossing operation is solved, and the use scene and method of the movable umbrella-shaped crossing frame are further perfected.

Description

Technical Field

[0001] This utility model relates to a netting device used in conjunction with a mobile umbrella-shaped crossing frame, belonging to the technical field of mechanized equipment for power line crossing construction. Background Technology

[0002] In the construction of power lines, it is inevitable to cross ground facilities such as highways, railways, and buildings, as well as existing power lines. In order to protect these facilities and ensure construction safety, crossing frames must be erected to protect the objects being crossed.

[0003] Traditionally, crossing scaffolding is erected primarily using wood, bamboo, or steel pipes. The scaffolding is manually constructed from bottom to top on both sides of the object being crossed to ensure a safe support structure for the crossing construction and meet safety requirements. However, scaffolding construction involves working at heights, and any insecure scaffolding can pose significant safety hazards. Furthermore, because ordinary crossing scaffolding is built on both sides of the object being crossed, it requires manual netting to cover the top. Current netting techniques require manual installation of the netting ropes or poles at height or the deployment of traction ropes using drones before netting is applied. If the object being crossed is a live power line, electrical safety regulations prohibit the deployment of traction ropes using drones on unprotected live lines. Therefore, the power to the crossed power line must be de-energized during netting, making it impossible to install and dismantle the crossing scaffolding without power interruption.

[0004] To improve power quality, ensure user electricity supply, and address the challenge of maintaining uninterrupted power supply in special circumstances, power outages are extremely difficult to achieve. Therefore, the erection and dismantling of cross-passages without power interruption is a fundamental requirement.

[0005] To address the problems associated with traditional crossing frame construction, a mobile umbrella-shaped crossing frame has been developed in recent years. This mobile umbrella-shaped crossing frame operates on the principle of an umbrella, relying on a crane for lifting and lowering. During construction, it can be quickly deployed, forming a horizontal safety net platform to meet the needs of the crossing operation. After completion, it can be quickly retracted and removed, completely solving the problems of long construction cycles, high-altitude work, and numerous safety hazards associated with manually erecting crossing frames from the bottom up. Furthermore, because the mobile umbrella-shaped crossing frame can be lifted by a crane from a safe area next to the live line to a height higher than the live line being crossed, and then the horizontal safety net platform of the mobile umbrella-shaped crossing frame is positioned above the live line by rotating the crane's boom, it can be deployed and dismantled without interrupting power to the live line being crossed, provided there is sufficient safe space, thus achieving completely uninterrupted power crossing.

[0006] While mobile umbrella-shaped crossing frames can be installed and dismantled without power interruption and can achieve horizontal netting at the top, their protection range is limited. Especially when a line breaks during installation, the upper part of the disconnected conductor, prevented from contacting the live line by the horizontal netting platform at the top of the crossing frame, will swing back, potentially contacting the energized line below the mobile umbrella-shaped crossing frame. This could result in electric shock, causing the crossed line to trip or, in severe cases, electrocution of all construction workers. When the protected objects are buildings, roads, highways, or expressways, the swinging back of the disconnected conductor can also damage these structures, and more seriously, collide with vehicles and pedestrians, causing significant personal injury and property damage. If the installed mobile umbrella-shaped crossing frame is simply netted at the front and back, manual high-altitude work and work near live conductors are required, still posing significant safety hazards and increasing site preparation and high-altitude work costs. If two sets of mobile umbrella-shaped crossing frames are used to form an opposing network to meet the construction requirements, it will lead to an increase in the ground area required at the construction site, an increase in equipment, a significant increase in construction costs, and the limitations of construction will also become apparent.

[0007] If the protection range of the mobile umbrella-shaped crossing frame cannot be expanded and manual high-altitude and near-energized work cannot be avoided, the advantages of the mobile umbrella-shaped crossing frame cannot be fully utilized. Summary of the Invention

[0008] The purpose of this utility model is to address the shortcomings of the existing technology of mobile umbrella-shaped crossing frames by providing a simple structure, a safety netting device that can safely cross power lines and highways, and a method for installing and removing protective netting on the ground, which works in conjunction with mobile umbrella-shaped crossing frames. This protective netting device relies on the front and rear canopy trusses of a mobile umbrella-shaped crossing frame to reliably carry the front end of the front netting traction rope across the energized line and highway being crossed from a high altitude, without requiring power outages on the crossed line or complete road closures. When sealing the front protective netting, workers on the ground behind the mobile umbrella-shaped crossing frame use the rear end of the front netting traction rope to set up and remove the netting. When sealing the rear protective netting, the rear canopy truss carries the rear netting traction rope to a high altitude behind the mobile umbrella-shaped crossing frame, where workers on the ground behind the mobile umbrella-shaped crossing frame use the rear end of the rear netting traction rope to set up and remove the netting, eliminating the need for manual high-altitude work and work near energized bodies. This addresses the safety hazards of manual high-altitude work and work near energized bodies required for installing protective netting devices on existing mobile umbrella-shaped crossing frames, as well as the insufficient protection range of the crossing frame.

[0009] The front and rear orientations described below for this utility model are based on actual usage, as shown in the accompanying drawings. Figure 1 Using the crane boom as a reference, the right side of the boom is the front, and the left side of the boom is the rear.

[0010] This utility model achieves the above objectives through the following technical solution:

[0011] A netting device for use with a mobile umbrella-shaped traverse frame comprises a front netting device, a traverse frame control system, a traverse frame remote control, and a rear netting device. The front netting device is installed on the front parapet truss on the right side of the mobile umbrella-shaped traverse frame, and the rear netting device is installed on the rear parapet truss on the left side of the mobile umbrella-shaped traverse frame. The front netting device is connected to the traverse frame control system via a signal transmission cable, and the traverse frame control system, when powered on, communicates wirelessly with the traverse frame remote control.

[0012] The front sealing net device consists of a locking pin and pulley device, a double pulley device, a front protective net, a middle guide wheel, a front net traction rope, a shackle, a counterweight, a sealing net pull rope, and a ground anchor. The locking pin and pulley device consists of a locking pin and pulley device mounting base, a large linear bearing, a geared motor, a connecting pin, a T-shaped screw, a screw nut, a connecting plate, a locking pin, a small linear bearing, a pulley, and a pulley pin. The locking pin and pulley device is bolted to the head of the front umbrella arm truss, and the locking pin is driven by the geared motor for extension and retraction. The double pulley device consists of a double pulley mounting base, a first pulley, a second pulley, and a double pulley pin shaft. The double pulley device is bolted to the mounting plate at the end of the rear umbrella arm truss. The middle guide wheel consists of a guide wheel mounting base, a guide wheel pulley, and a guide wheel pin shaft. The middle guide wheel is bolted to both ends of the middle umbrella arm truss and the lower part of the umbrella base. When the mobile umbrella-shaped crossing frame is in the retracted state, the front end of the front net traction rope passes sequentially through the first pulley of the double pulley device, the intermediate pulley, the locking pin, and the pulley of the pulley device. Then, the front end of the front net traction rope and the counterweight are suspended on the locking pin of the locking pin and pulley device by a shackle. The rear end of the front net traction rope is lowered to the ground from the first pulley of the double pulley device. After the locking pin of the locking pin and pulley device is opened, the shackle slides off the locking pin. Under its own weight, the counterweight guides the end of the front net traction rope connected to it vertically to the ground through the shackle. After the counterweight is removed, the end of the front net traction rope is connected to the upper end of the front protective net. By pulling the rear end of the front net traction rope, the front protective net is lifted to close to the locking pin and pulley device. Then, the rear end of the front net traction rope is tightened and connected to the ground anchor. The lower end of the front protective net is connected to the sealing net pull rope. After the sealing net pull rope is tightened, it is connected to the ground anchor.

[0013] The rear netting device consists of a double pulley system, a rear protective net, a rear netting traction rope, a netting pull rope, and a ground anchor. The double pulley system comprises a double pulley mounting base, a first pulley, a second pulley, and a double pulley pin. The double pulley system is bolted to the mounting plate at the end of the rear umbrella-shaped truss. When the mobile umbrella-shaped crossing frame is in the retracted state, one end of the rear netting traction rope is passed around the second pulley of the double pulley system and then folded in half and placed on the ground. When the mobile umbrella-shaped crossing frame is raised, the double pulley system lifts the middle of the rear netting traction rope to a high altitude. The front end of the rear netting traction rope is then connected to the upper end of the rear protective net. By pulling the rear end of the rear netting traction rope, the rear protective net is lifted to the vicinity of the double pulley system. The rear end of the rear netting traction rope is then tightened and connected to the ground anchor. The lower end of the rear protective net is connected to the netting pull rope, which is then tightened and connected to the ground anchor.

[0014] The geared motor of the locking pin and pulley device is connected to the crossing frame control system via a signal transmission cable, and the crossing frame remote control controls the crossing frame control system to open and close the locking pin of the locking pin and pulley device.

[0015] The advantages of this utility model compared with the prior art are as follows:

[0016] This netting device, used in conjunction with a mobile umbrella-shaped crossing frame, expands the protection range of the mobile umbrella-shaped crossing frame and improves the safety and economy of construction operations. The locking pins of the front netting device and the pulley device can be opened and closed via the crossing frame's control system, reliably guiding the front end of the front netting traction rope across the object being crossed. After the locking pins are opened, the weight of the counterweight pulls the front netting traction rope to the ground, where workers can then manually deploy the front protective netting using the traction rope. The rear netting is then brought to a higher altitude via the mobile umbrella-shaped crossing frame, allowing workers to deploy and dismantle the rear protective netting on the ground. The entire netting deployment and dismantling process eliminates the need for personnel to work at heights or near live electrical components, significantly reducing the risks associated with working near live electrical components and working at heights. This invention, particularly during uninterrupted power line crossing construction, enhances the protection of the crossed lines, effectively preventing electric shock accidents caused by broken conductors or the backlash of conductors at the crossing point connecting with the energized lines below. It effectively ensures the safety of power line construction and truly achieves uninterrupted power line crossing operations. Furthermore, it allows for the installation and removal of protective netting while the crossed lines remain powered, and expands the protection range of the mobile umbrella-shaped crossing frame, increasing the safety of the crossing construction. Additionally, this invention effectively avoids personal injury and property damage caused by the backlash of broken conductors hitting vehicles and pedestrians when the protected object is a road, highway, or expressway. It also allows for the installation and removal of the netting device without completely blocking the road, reducing the impact on traffic. Under normal circumstances, this invention can replace two ordinary mobile umbrella-shaped crossing frames for opposing netting with one set of mobile umbrella-shaped crossing frames with front and rear netting devices, significantly reducing construction costs. Attached Figure Description

[0017] Figure 1 A schematic diagram of the working state of the cross-passage frame for the use of the netting device in cross-passage construction without power interruption;

[0018] Figure 2 This is a schematic diagram of the locking pin and pulley device before it is opened.

[0019] Figure 3 This is a schematic diagram of the structure after the locking pin and pulley device is opened;

[0020] Figure 4 This is a cross-sectional structural diagram of the locking pin and pulley device;

[0021] Figure 5 This is a schematic diagram of the axle side structure of the locking pin and pulley device;

[0022] Figure 6A schematic diagram of the mounting base for the locking pin and pulley device;

[0023] Figure 7 A schematic diagram of the structure of a double pulley system;

[0024] Figure 8 A schematic diagram of the structure in which the intermediate wheel is installed on the intermediate umbrella arm truss;

[0025] Figure 9 A schematic diagram of the structure in which the intermediate roller is installed on the umbrella base;

[0026] Figure 10 Electrical schematic diagram of a mobile umbrella-shaped crossing frame;

[0027] Figure 11 This is a schematic diagram showing the arrangement of the traction ropes before the mobile umbrella-shaped crossing frame is deployed.

[0028] In the diagram: 1. Mobile umbrella-shaped truss; 101. Front umbrella arm truss; 102. Rear umbrella arm truss; 103. Middle umbrella arm truss; 104. Umbrella base; 2. Construction line; 3. Live power line; 4. Front sealing net device; 401. Locking pin and pulley device; 401001. Locking pin and pulley device mounting base; 401002. Large linear bearing; 401003. Gear motor; 401004. Connecting pin; 401005. T-shaped lead screw; 401006. Lead screw nut; 401007. Connecting plate; 401008. Locking pin; 401009. Small linear bearing; 401010. Pulley; 401011. Pulley pin; 402. Double pulley device; 40201. Double pulley mounting base; 40202. First pulley; 40203. Second pulley. 40204, Double pulley pin; 403, Front protective net; 404, Intermediate guide pulley; 40401, Guide pulley mounting bracket; 40402, Guide pulley pulley; 40403, Guide pulley pin; 40404, Quick-release pin; 405, Front net traction rope; 406, Shackle; 407, Counterweight; 5, Crossing frame control system; 501, Control system circuit board; 502, Data integration and processing unit; 503, Wired communication module; 504, Wireless communication module A; 6, Crossing frame remote control; 601, Remote control circuit board; 602, Remote data processing module; 603, Wireless communication module B; 604, Remote control operation button; 605, Display screen; 7, Rear net sealing device; 701, Rear protective net; 702, Rear net traction rope; 8, Net sealing rope; 9, Ground anchor. Detailed Implementation

[0029] (See appendix) Figure 1-11 )

[0030] The netting device used in conjunction with the mobile umbrella-shaped bridging frame consists of a front netting device 4, a bridging frame control system 5, a bridging frame remote control 6, and a rear netting device 7. The front netting device 4 is installed on the front umbrella arm truss 101 on the right side of the mobile umbrella-shaped bridging frame 1, and the rear netting device 7 is installed on the rear umbrella arm truss 102 on the left side of the mobile umbrella-shaped bridging frame 1. The front netting device 4 is connected to the bridging frame control system 5 via a signal transmission cable. When the bridging frame control system 5 is powered on, it is connected to the bridging frame remote control 6 via remote wireless communication.

[0031] The front sealing net device 4 consists of a locking pin and pulley device 401, a double pulley device 402, a front protective net 403, an intermediate guide wheel 404, a front net traction rope 405, a shackle 406, a counterweight 407, a sealing net pull rope 8, and a ground anchor 9. The locking pin and pulley device 401 consists of a locking pin and pulley device mounting base 401001, a large linear bearing 401002, a reduction motor 401003, a connecting pin 401004, a T-shaped lead screw 401005, a lead screw nut 401006, a connecting plate 401007, a locking pin 401008, a small linear bearing 401009, a pulley 401010, and a pulley pin 401011. The structure comprises a locking pin and pulley device 401, which is bolted to the head of the front parasol truss 101. The locking pin 401008 is driven by a reduction motor 401003 for telescopic movement. The double pulley device 402 consists of a double pulley mounting base 40201, a first pulley 40202, a second pulley 40203, and a double pulley pin 40204. The double pulley device 402 is bolted to the mounting plate at the end of the rear parasol truss 102. The intermediate guide wheel 404 consists of a guide wheel mounting base 40401, a guide wheel pulley 40402, and a guide wheel pin 40403. The intermediate guide wheel 404 is mounted on a guide wheel mounting base 40401, a guide wheel pulley 40402, and a guide wheel pin 40403. Mounting bracket 40401 is bolted to the two ends of the intermediate umbrella arm truss 103 and the lower part of the umbrella base 104; when the movable umbrella-shaped crossing frame 1 is in the retracted state, the front end of the front net traction rope 405 passes sequentially through the first pulley 40202 of the double pulley device 402, the intermediate passing pulley 404, and the pulley 401010 of the locking pin and pulley device 401, and then through the shackle 406 the front end of the front net traction rope 405 and the counterweight 407 are suspended on the locking pin 401008 of the locking pin and pulley device 401, and the rear end of the front net traction rope 405 is lowered to the ground from the first pulley 40202 of the double pulley device 402; After the locking pin 401008 of the locking pin and pulley device 401 is opened, the shackle 406 slides off the locking pin 401008. Under its own weight, the counterweight 407 guides the end of the front net traction rope 405 connected to it vertically to the ground through the shackle 406. After the counterweight is removed, the end of the front net traction rope 405 is connected to the upper end of the front protective net 403. The front protective net 403 is lifted to the position close to the locking pin and pulley device 401 by pulling the rear end of the front net traction rope 405. Then, the rear end of the front net traction rope 405 is tightened and connected to the ground anchor 9. The lower end of the front protective net 403 is connected to the sealing net pull rope 8. The sealing net pull rope 8 is tightened and connected to the ground anchor 9.

[0032] The rear netting device 7 consists of a double pulley device 402, a rear protective net 701, a rear netting traction rope 702, a netting pull rope 8, and a ground anchor 9. The double pulley device 402 consists of a double pulley mounting base 40201, a first pulley 40202, a second pulley 40203, and a double pulley pin 40204. The double pulley device 402 is bolted to the mounting plate at the end of the rear umbrella arm truss 102 by the double pulley mounting base 40201. When the movable umbrella-shaped crossing frame 1 is in the retracted state, one end of the rear netting traction rope 702 is looped around the net. The second pulley of the double pulley device 402 is folded in half and placed on the ground. When the mobile umbrella-shaped crossing frame 1 is lifted, the double pulley device 402 brings the middle part of the rear net traction rope 702 to the air. Then, the front end of the rear net traction rope 702 is connected to the upper end of the rear protective net 701. The rear protective net 701 is lifted to the vicinity of the double pulley device 402 by pulling the rear end of the rear net traction rope 702. Then, the rear end of the rear net traction rope 702 is tightened and connected to the ground anchor 9. The lower end of the rear protective net 701 is connected to the sealing net pull rope 8. The sealing net pull rope 8 is tightened and connected to the ground anchor 9.

[0033] The geared motor 401003 of the locking pin and pulley device 401 is connected to the crossing frame control system 5 through a signal transmission cable, and the crossing frame remote control 6 controls the crossing frame control system 5 to open and close the locking pin 401008 of the locking pin and pulley device 401.

[0034] The mobile umbrella-shaped gantry 1 is based on the umbrella principle and is used in combination with a crane. When folded, it is convenient to place on a transport frame for transportation and to be lifted and lowered together with the crane boom. When unfolded, it forms a horizontal netting platform. Mounting plates for locking pins and pulley devices 401 are welded to the front ends of the three front umbrella arm trusses 101 of the mobile umbrella-shaped gantry 1; mounting plates for double pulley devices 402 are welded to the front ends of the three rear umbrella arm trusses 102; and mounting plates for intermediate guide wheels 404 are welded to the front ends of the two middle umbrella arm trusses 103 and the lower part of the umbrella base 104, for a total of three locations.

[0035] The front and rear sealing devices 4 and 7 of the sealing device used in conjunction with the mobile umbrella-shaped crossing frame 1 can be used independently, or two sets of crossing frames can be used to perform horizontal sealing with the front sealing device 4 when the line crossing angle is very small, further increasing the protection length.

[0036] The above-mentioned method of using the sealing netting device in conjunction with the mobile umbrella-shaped crossing frame consists of the following steps:

[0037] S1. Inspection of prefabricated ground anchors and equipment: Before the live crossing operation, in accordance with the requirements of the complete power-off crossing construction plan, prefabricate 6 ground anchors 9 on both sides of the live line 3 that needs to be crossed; turn on the power supply of the crossing frame control system 5 and the power supply of the crossing frame remote control 7 at the same time, so that the crossing frame control system 5 and the crossing frame remote control 7 can achieve normal wireless communication.

[0038] S2. Rope Installation: Pass the front ends of the three front net traction ropes 405 through the grooves of the first pulley 40202 of the double pulley device 402; then remove the quick-release pin 40404 of the intermediate pulley 404, place the front net traction ropes 405 between the quick-release pin 40404 and the pulley 40402, and then insert the quick-release pin 40404; then thread the front net traction ropes 405 into the grooves of the locking pin and the pulley 401010 of the pulley device 401, and then use the shackle 406 to connect the front net traction ropes 405 to the pulley grooves of the pulley device 401. The counterweight 407 is connected. Using the remote control 6 of the gantry frame, the remote control button 604 is used to select the corresponding position of the locking pin and pulley device 401 on the display screen 605 to open it. The opening signal is transmitted through the internal circuit of the remote control circuit board 601 to the remote data processing module 602, and then through the wireless communication module B603 to the wireless communication module A504 on the gantry frame control system 5. The data is then transmitted through the internal circuit of the control system circuit board 501 to the data integration processing unit 502. The data integration processing unit 502 transmits the opening signal through the internal circuit of the control system circuit board 501 to the geared motor 401003 on the corresponding position of the locking pin and pulley device 401 via the wired communication module 503. The geared motor 401003 drives the T-shaped lead screw 401005 to rotate forward, opening the locking pin 401008. Then, the shackle 406 is engaged with the locking pin 401008. The gantry frame is remotely operated. Device 6 sends a closing signal to close the locking pin 401008, which holds the shackle 406 and the front net traction rope 405 and the counterweight 407. The rear end of the front net traction rope 405 is placed on the ground by the groove of the first pulley 40202 of the double pulley device 402, completing the front net tying rope. The front ends of the three rear net traction ropes 702 are passed through the grooves of the second pulley 40203 of the double pulley device 402, with both ends left with sufficient length on the ground, completing the net tying rope.

[0039] S3. Erection and Arrangement of Mobile Umbrella-Shaped Crossing Frame 1: After the preliminary work is completed, the crane is positioned at the location specified in the construction plan, the crane is grounded, and then the mobile umbrella-shaped crossing frame 1 is connected to the auxiliary boom connection seat of the crane; after the connection is completed, the crane boom is used to lift the mobile umbrella-shaped crossing frame 1 to the position required by the construction plan, and the mobile umbrella-shaped crossing frame 1 is unfolded and adjusted; at this time, it is necessary to ensure that the construction line 2 above and the live line 3 below are within the protection range of the mobile umbrella-shaped crossing frame 1, and to ensure that all traction ropes are kept away from the live line 3;

[0040] S4. Lowering the front net traction rope 405: After the mobile umbrella-shaped crossing frame 1 is set up and the on-site safety officer confirms the safety of the live-line work, preparations are made to open the locking pin 401008. Taking the lowering of one of the front net traction ropes 405 as an example, the operator uses the remote control button 604 on the remote control 6 of the crossing frame to select the corresponding locking pin and pulley device 401 on the display screen 605 to open the locking pin 401008. The opening signal is transmitted through the internal circuit of the remote control circuit board 601 to the remote data processing module 602, and then through the internal circuit of the remote control circuit board 601 to the wireless communication module A504 on the crossing frame control system 5 via the wireless communication module B603. Then, it is transmitted through the internal circuit of the control system circuit board 501 to the data integration processing unit 502. The data integration processing unit 502 transmits the opening signal through the internal circuit of the control system circuit board 501 via the wired communication module. Block A503 transmits the signal to the geared motor 401003 on the corresponding locking pin and pulley device 401. The geared motor 401003 drives the T-shaped lead screw 401005 to rotate forward. Finally, the locking pin 401008 is opened, the shackle 406 falls off, and the counterweight 407, under its own weight, pulls the front end of the front net traction rope 405 downward through the shackle 406. Finally, the worker standing behind the mobile umbrella-shaped crossing frame 1 controls the rear of the front net traction rope 405 and lowers the counterweight 407, which carries the front end of the front net traction rope 405, from the front of the mobile umbrella-shaped crossing frame 1 to the ground. Thus, the first set of locking pin and pulley devices 401 is completed in lowering the front net traction rope 405. The construction process of lowering the front net traction rope 405 of the remaining two sets of locking pin and pulley devices 401 is the same.

[0041] S5. Installation of Protective Net: After the front net traction rope 405 is lowered, the three front net traction ropes 405 in front of the mobile umbrella-shaped crossing frame 1 are connected to the upper part of the front protective net 403 using shackles 406. The lower part of the front protective net 403 is connected to one end of the three sealing net pull ropes 8. The operator standing behind the mobile umbrella-shaped crossing frame 1 controls the rear of the front net traction ropes 405 and lifts the front ends of the three front net traction ropes 405 together with the front protective net 403 to a position close to the locking pin and pulley device 401. After the three front net traction ropes 405 are tightened, they are anchored to the ground anchor 9 on the rear side of the mobile umbrella-shaped crossing frame 1. Then, the other end of the sealing net pull rope 8 is tightened and anchored to the ground anchor 9 on the front side of the mobile umbrella-shaped crossing frame 1. At this time, the front sealing net device 4 is completed. After the front netting device 4 completes the netting, the three rear netting traction ropes 702 at the rear of the mobile umbrella-shaped crossing frame 1 are connected to the upper part of the rear protective netting 701. The lower part of the rear protective netting 701 is connected to the three netting pull ropes 8. The operator standing behind the mobile umbrella-shaped crossing frame 1 controls the rear netting traction ropes 702 to lift the rear protective netting 701 close to the double pulley device 402, tightens the rear netting traction ropes 702 and anchors them to the ground anchors 9 at the rear. Then, the netting pull ropes 8 are tightened and anchored to the ground anchors 9 at the rear, completing the netting operation of the rear netting device 7 of the mobile umbrella-shaped crossing frame 1. At this point, the front protective netting 403 and the rear protective netting 701 of the mobile umbrella-shaped crossing frame 1 are installed.

[0042] S6. Installation of the construction line and accessories: After the front and rear netting is installed and passes inspection, the construction line can be installed and accessories can be installed. After the accessories are installed, the front and rear netting can be removed only after passing inspection.

[0043] S7. Removal of the protective net: After confirming that the protective net can be removed, first release the front net traction rope 405 from the ground anchor 9 at the rear of the mobile umbrella-shaped crossing frame 1. After placing the front protective net 403 on the ground, open the shackle 406 to separate it from the front net traction rope 405. Use the shackle 406 to hang a counterweight 407 on the front net traction rope 405 to prevent the front net traction rope 405 from contacting the live lines due to wind during the lifting process. Then, use a person to lift the counterweight 407 at the rear of the mobile umbrella-shaped crossing frame 1 to the locking pin and pulley device 401 near the front of the mobile umbrella-shaped crossing frame 1 and hold it there. Disconnect the rear netting traction rope 702 from the ground anchor 9, lower the rear protective netting 701 to the ground and separate it from the rear netting traction rope 702, and join the front and rear ends of the rear netting traction rope 702 together; all traction ropes remain on the mobile umbrella-shaped crossing frame 1, and personnel are required to keep the traction ropes away from the live power line 3; release the netting pull rope 8 from the ground anchor 9, and store the protective netting and pull ropes for future use; the netting removal operation is now complete.

[0044] S8. Arrangement of traction ropes and removal of mobile umbrella-shaped crossing frame: After the netting is removed, the rotating crane boom rotates the mobile umbrella-shaped crossing frame 1 to a safe area. The remote control 5 is used to retract the mobile umbrella-shaped crossing frame 1, and the crane boom is retracted and lowered to a horizontal position. The counterweight 407 is removed from the front end of the front netting traction rope 405, and the front end of the front netting traction rope 405 is fastened with the locking pin 401008, completing the arrangement of the front end of the front netting traction rope 405. All traction ropes are arranged and stored on the mobile umbrella-shaped crossing frame for the next step of the work. Then, the mobile umbrella-shaped crossing frame 1 is separated from the crane boom, and the mobile umbrella-shaped crossing frame 1 is placed into the transport frame using the crane. The entire removal work is completed.

Claims

1. A netting device for use with a mobile umbrella-shaped crossing frame, comprising a front netting device (4), a crossing frame control system (5), a crossing frame remote control (6), and a rear netting device (7), characterized in that, The front sealing net device (4) is installed on the front umbrella arm truss (101) on the right side of the mobile umbrella-shaped crossing frame (1), and the rear sealing net device (7) is installed on the rear umbrella arm truss (102) on the left side of the mobile umbrella-shaped crossing frame (1). The front sealing net device (4) is connected to the crossing frame control system (5) through a signal transmission cable. The crossing frame control system (5) is connected to the crossing frame remote control remote controller (6) through remote wireless communication when the system is powered on.

2. The sealing netting device for use with a mobile umbrella-shaped crossing frame according to claim 1, characterized in that, The front sealing net device (4) consists of a locking pin and pulley device (401), a double pulley device (402), a front protective net (403), an intermediate pulley (404), a front net traction rope (405), a shackle (406), a counterweight (407), a sealing net pull rope (8), and a ground anchor (9). The locking pin and pulley device (401) consists of a locking pin and pulley device mounting base (401001), a large linear bearing (401002), a geared motor (401003), a connecting pin (401004), a T-shaped screw (401005), a screw nut (401006), a connecting plate (401007), a locking pin (401008), a small linear bearing (401009), a pulley (401010), and a sliding pin. The device consists of a wheel pin (401011), a locking pin and a pulley device (401) are bolted to the head of the front parasol truss (101), and the locking pin (401008) is driven by a reduction motor (401003) for telescopic movement; the double pulley device (402) consists of a double pulley mounting base (40201), a first pulley (40202), a second pulley (40203), and a double pulley pin (40204), and the double pulley device (402) is bolted to the mounting plate at the end of the rear parasol truss (102); the intermediate guide wheel (404) consists of a guide wheel mounting base (40401), a guide wheel pulley (40402), and a guide wheel pin (40403), and the intermediate guide wheel ( 404) The intermediate umbrella arm truss (103) and the lower part of the umbrella seat (104) are bolted to the wheel mounting base (40401); when the mobile umbrella-shaped traverse frame (1) is in the retracted state, the front end of the front net traction rope (405) passes through the first pulley (40202) of the double pulley device (402), the intermediate wheel (404), and the pulley (401010) of the locking pin and pulley device (401) in sequence, and then the weight (407) is suspended on the locking pin (401008) of the locking pin and pulley device (401) by the shackle (406), and the rear end of the front net traction rope (405) is lowered to the ground from the first pulley (40202) of the double pulley device (402); After the locking pin (401008) of the locking pin and pulley device (401) is opened, the shackle (406) slides off the locking pin (401008). Under its own weight, the counterweight (407) guides the end of the front net traction rope (405) connected to it vertically to the ground through the shackle (406). After the counterweight is removed, the end of the front net traction rope (405) is connected to the upper end of the front protective net (403). The front protective net (403) is lifted to the point close to the locking pin and pulley device (401) by pulling the rear end of the front net traction rope (405). Then the rear end of the front net traction rope (405) is tightened and connected to the ground anchor (9). The lower end of the front protective net (403) is connected to the sealing net pull rope (8). The sealing net pull rope (8) is tightened and connected to the ground anchor (9).

3. The sealing netting device for use with a mobile umbrella-shaped crossing frame according to claim 1, characterized in that, The rear netting device (7) consists of a double pulley device (402), a rear protective net (701), a rear netting traction rope (702), a netting pull rope (8), and a ground anchor (9); the double pulley device (402) consists of a double pulley mounting base (40201), a first pulley (40202), a second pulley (40203), and a double pulley pin (40204); the double pulley device (402) is mounted on the mounting plate at the end of the rear umbrella truss (102) by bolts to the double pulley mounting base (40201); the rear netting traction rope (702) is used to pull the netting in the retracted state of the mobile umbrella-shaped crossing frame (1). After passing the second pulley of the double pulley device (402), the end is folded in half and placed on the ground. When the mobile umbrella-shaped crossing frame (1) is lifted, the double pulley device (402) brings the middle part of the rear net traction rope (702) to the high air. Then, the front end of the rear net traction rope (702) is connected to the upper end of the rear protective net (701). The rear protective net is lifted to the vicinity of the double pulley device (402) by pulling the rear end of the rear net traction rope (702). Then, the rear end of the rear net traction rope (702) is tightened and connected to the ground anchor (9). The lower end of the rear protective net (701) is connected to the sealing net pull rope (8). The sealing net pull rope (8) is tightened and connected to the ground anchor (9).

4. A sealing net device for use with a mobile umbrella-shaped crossing frame according to claim 2, characterized in that, The geared motor (401003) of the locking pin and pulley device (401) is connected to the gantry control system (5) via a signal transmission cable, and the gantry remote control (6) controls the gantry control system (5) to open and close the locking pin (401008) of the locking pin and pulley device (401).

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