Safety protection system used under high-voltage line and construction, operation and maintenance method thereof

Abstract

The invention provides a safety protection system used under a high-voltage line and a construction, operation and maintenance method thereof.The safety protection system comprises a concrete strip-shaped foundation where a steel plate is embedded, H-shaped steel is welded and fixed to the steel plate to serve as a sliding rail, and a sliding beam system composed of a sliding support and a fixed cross beam is installed on the H-shaped steel in a sliding mode; lifting beams are installed on the upper portions of the stand columns, a protection safety net is installed between the lifting beams on the stand columns on the two sides, and a sensor is installed on the protection safety net and is in signal connection with a background controller and an alarm device. The movable and liftable safety protection system under the high-voltage line is constructed, and the safety protection system is safe, reliable, high in construction speed, high in field applicability, high in convenience, capable of achieving intelligent dynamic adjustment and extremely high in generalization performance.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and in particular relates to a safety protection system for high-voltage lines and a construction and operation method thereof. Background Art

[0002] With the development of economy and society, more and more municipal roads or highways will be put into construction, and in the process of engineering construction, it is inevitable that there will be spatial conflicts with existing high-voltage lines. At present, there are two common methods to solve the problem of under-construction highways passing under existing high-voltage lines and the safety distance is small: one is that the power company relocates or raises the height of the existing high-voltage lines to meet the safety distance requirements; the advantage of this method is that it can fundamentally and thoroughly solve the impact of existing high-voltage lines on engineering construction, but the disadvantage is that it is difficult to coordinate with the power unit, the relocation cycle is long, the cost is high, and the adverse impact on the progress of engineering construction and total investment is large. The second is to make engineering design changes, change the road plane linear design or the elevation design of the building, and avoid the existing high-voltage lines; the advantage of this method is that the coordination difficulty is small and the cycle is short, but the disadvantage is that it will change the original overall design of the project and affect the overall coordination of the project. Therefore, there is a huge risk of construction hazards in the construction under the high-voltage line, and the power department strictly controls the construction under the line, and the construction progress is slow. To this end, the present invention designs a safety protection system for high-voltage lines and a construction and operation method thereof. Summary of the invention

[0003] In view of the deficiencies in the prior art, the present invention provides a safety protection system for high-voltage lines and a construction and operation method thereof, which solves the potential safety hazards in construction under high-voltage lines and constructs a movable and liftable safety protection system for high-voltage lines. The system is safe and reliable, has a fast construction speed, strong on-site applicability, high convenience, intelligent dynamic adjustment, and strong generalizability.

[0004] The present invention achieves the above technical objectives through the following technical means.

[0005] A safety protection system for use under a high-voltage line, comprising a set of concrete strip foundations, wherein a plurality of steel plates are pre-embedded in the concrete strip foundations, and the top surface of the steel plates is flush with the finished surface of the concrete strip foundations; further comprising a sliding track, a sliding support, and a fixed beam, wherein the sliding track is welded and fixed to the steel plate, a plurality of sliding supports are slidably mounted on the sliding track, a truss-type fixed beam is welded and fixed to the top of the sliding support, and the fixed beam connects all the sliding supports to form a sliding beam system, wherein the sliding beam system slides along the sliding track through the pulling of a winch, a steel wire rope, and a wireless remote controller; A space for the insertion of the truss - type column is reserved at the positions near both ends of the fixed cross - beam. The lower part of the column is inserted into the fixed cross - beam and the bottom of the column is located on the sliding support. The contact parts between the column and the fixed cross - beam and the sliding support are all welded and fixed. A truss - type lifting cross - beam is also inserted and installed between two columns on the same side. The lifting cross - beam is towed by an electric hoist controlled by a wireless remote control, slides up and down along the column to adjust the height, and is locked and fixed on the column by an electromagnetic lock controlled by a wireless remote control. A protective safety net is installed between the two lifting cross - beams. The protective safety net is located below the high - voltage line. The area below the protective safety net is the offline safe operation area. Sensors are installed on the protective safety net, and the sensors are signal - connected to the background controller and the alarm device.

[0006] Further, a plurality of holes are symmetrically reserved at the same positions on the steel plate and the sliding support. After the sliding beam system slides into place, long screws are sequentially passed through the holes on the steel plate and the sliding support and then locked and fixed by nuts, thereby realizing the locking of the sliding beam system.

[0007] Further, the sliding track adopts multi - section butt - jointed H - shaped steel. The sliding support includes a "π" - shaped support housing. Three horizontal axes are arranged inside the support housing. The two lower horizontal axes are both connected to steel rollers through rolling bearings. The inner ring of the rolling bearing is welded and fixed to the horizontal axis, and the outer ring is welded and fixed to the steel roller. The steel rollers on the two lower horizontal axes are respectively located on the lower flanges on both sides of the H - shaped steel web and roll along the lower flange. Lateral limits are also formed between the ends of the two lower horizontal axes and the H - shaped steel. A steel roller is also installed in the middle of the upper horizontal axis, and both ends are connected to the support housing. The steel roller on the upper horizontal axis is located on the upper surface of the upper flange of the H - shaped steel and rolls along the upper flange.

[0008] Further, the protective safety net is composed of steel wire ropes and safety nets. The top of the safety protection system frame is fully covered with a safety net with thin insulating steel wires passing through it. The safety net is tied to the steel wire ropes with binding wires, and both ends of the steel wire ropes are fixed on the lifting cross - beam.

[0009] Further, high - voltage protection signs are set on the column, and reflective strips are pasted. Light belts are installed around the protective safety net.

[0010] A construction and operation and maintenance method for the above - mentioned safety protection system under high - voltage lines includes the following processes: Step 1: Construction of the concrete strip foundation; Survey and setting out, using square steel as a temporary formwork, and pouring concrete; the steel plate is fixed in position in advance with steel bar heads, arranged in the middle in the width direction and evenly spaced in the length direction; Step 2: Construction of the sliding track; Use H - shaped steel as the sliding track, weld it to the steel plate, and multiple sections of H - shaped steel are brought into the site and butt - jointed and lengthened; Step 3: Assembly construction of the sliding beam system; The sliding beam system consists of a sliding support and a fixed beam. First, slide multiple sliding supports in sequence along the sliding track and arrange them evenly. Then, use a car crane to hoist the pre-processed fixed beam onto the sliding support and weld it to the top of the sliding support. The fixed beam is aligned with the outer edge of the sliding support at both ends in the length direction and fixed to the sliding support in the middle in the width direction. Step 4: Installation of lifting beam and protective safety net; The lifting beam and the fixed beam are of the same size and type. First, install two electromagnetic locks near the two ends of each lifting beam, and then use a truck crane to hoist and stack them on the fixed beam. The protective safety net is composed of steel wire ropes and safety nets, which are installed between the lifting beams. The safety net is tied to the steel wire ropes on both sides by tying wires, and the steel wire ropes are fixed on the lifting beams. Step 5: Column hoisting; First, hang the electric hoist hook on the horizontal bar at the top of the column in advance, and then install the column; use a car crane to install the column, and insert it into the lifting beam and the fixed beam with the bottom on the sliding support. Set a traction rope for control during lifting. After the lifting is completed, weld and fix the contact parts between the fixed beam, the sliding support and the column, and finally set a cable rope for temporary fixation; Step 6: Lift the lifting beam and protective safety net to the required height; After the installation of the column is completed, the wireless remote control controls the electric hoist. One end of the electric hoist is connected to the lifting beam, and the other end is electrically pulled to simultaneously lift and stop the lifting beams and protective safety nets on both sides. When the lifting beam rises to the specified height, the wireless remote control controls the electromagnetic lock to extend the lock tongue to control the positioning height of the lifting beam. Step 7: The safety protection system moves as a whole under the high-voltage line and is locked for use; Two winches are used in conjunction with a wire rope traction safety protection system. The wire rope is connected to the horizontal rod of the fixed beam. The two winches are operated synchronously using a wireless remote control to achieve synchronous traction and stop on both sides. After traction is in place, the sliding beam system is tightened and locked by long screws and bolts. Step 8: Operation and maintenance of the security protection system.

[0011] Further, the step 8 comprises: The sensor automatically senses and transmits signals to the background controller and alarm device when receiving information about thunderstorm weather, increased power supply, or the height of the protective safety net from the ground is greater than the specified value. The background controller immediately wirelessly controls the electric hoist to lower the height of the safety protection system and intelligently and dynamically adjusts the height of the lifting beam until the automatic sensing data is safe and stable and the alarm is lifted; After the offline construction of the current section is completed, the next section of the construction will be carried out in a continuous operation. The lifting beam and the protective safety net will be lowered in advance by wireless remote control. When the lifting beam falls on the fixed beam, the bolts and long screws will be removed. The wireless remote control will be used to control the two winches to synchronously pull the sliding beam system to the next section. The long screw will then be locked and the lifting beam and the protective safety net will be lifted again to the specified height. The offline machinery will then start to enter the site for operation. During the construction process, high-voltage protection signs and reflective strip signs on the columns are used to provide reminders and warnings. Light strips around the safety net provide lighting at night to prevent construction equipment from exceeding the protection range of high-voltage lines at night. The project department conducts safety inspections to check whether the protective net of the safety protection system is damaged, whether there are any alarms in the background data, whether the columns and foundation connections are normal, and whether the sliding bearings are used normally. If any problems are found, they will be repaired and replaced in a timely manner.

[0012] The present invention has the following beneficial effects: 1. The bottom of the safety protection system of the present invention is provided with a slidable support and a fixed crossbeam to meet the overall movement of the safety protection system. In linear projects such as municipal roads and highways, the position of the safety protection system can be flexibly and dynamically adjusted according to the progress of the construction work surface under the high-voltage line to ensure that "where the work is, the protection is there", and give full play to the protective effect of the work under the high-voltage line. It solves the disadvantages of the small protection range and large limitations of the traditional fixed safety protection system, and also avoids the ineffective work of repeated installation and dismantling of the safety protection system during construction, saving resources and construction time.

[0013] 2. The safety protection system of the present invention adopts a steel truss structure as a whole, which has a simple structure and clear force, can fully utilize the strength of the material, save materials, and reduce the weight of the entire structure. It is highly reusable after dismantling, which is economical and environmentally friendly.

[0014] 3. During the overall movement stage of the safety protection system of the present invention, a "Wu" sliding support is arranged on the H-shaped steel track, and a fixed horizontal axis, rolling bearings and steel rollers are arranged in the support. The horizontal axis and the H-shaped steel can also form a lateral limit, which solves the problem of deviation or derailment when the safety protection system moves as a whole.

[0015] 4. The height of the lifting beam of the safety protection system of the present invention can be freely adjusted according to the needs, meeting the different safety protection distance requirements of different high-voltage lines (such as 220kV, 500kV, etc.) and the operation requirements of machinery at different heights under the line, and has strong applicability. At the same time, since the height of the lifting beam is adjustable, the beam can be installed on the ground first during installation, and then raised to the required height. When disassembling, the beam can also be lowered first, and then disassembled, which reduces the high-altitude operations of installation and disassembly, reduces the operation risks, and has high safety.

[0016] 5. When the safety protection system is moved and raised, the horizontal movement adopts wireless remote control to control the double winches, so that the two sides of the safety protection system are evenly stressed, synchronously moved, and accurately positioned by long anchor rods and bolts. The vertical lifting adopts wireless remote control to control the electric hoist to ensure that the lifting beam is evenly stressed, synchronously lifted and lowered, and the displacement is accurate. The height of the safety protection system is determined by wireless remote control to control the electromagnetic lock, and the positioning is accurate. The traction, lifting, and locking operations are synchronously controlled by the wireless remote control, which solves the problem of uneven deformation of various parts of the safety protection system during movement and lifting. Notify the installation of (thunderstorm weather, power supply) sensors, and dynamically adjust the offline safety height after receiving the signal in the background, so as to realize the streamlined sliding turnover of the offline safety protection system, enhance the on-site applicability and practicality, improve the turnover efficiency of the safety protection system, and save construction costs and time. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the application of the safety protection system under the high-voltage line; Figure 2 It is the overall schematic diagram of the safety protection system; Figure 3 Schematic diagram of the foundation and sliding beam system; Figure 4 It is a schematic diagram of the steel plate and a large-scale drawing of its dimensions; Figure 5 This is the cross-sectional dimension drawing of H-beam; Figure 6 is a schematic diagram of a sliding support; Figure 7 This is the front view of the fixed beam; Figure 8 This is the left view of the fixed beam; Fig. 9 It is a schematic diagram of long screw and bolt locking; Fig.10 This is a schematic diagram of the installation of the electromagnetic lock device; In the figure: 1. Concrete strip foundation; 2. Steel plate; 3. H-shaped steel; 4. Sliding bearing; 401- bearing shell; 402- horizontal axis; 403- steel roller; 5. Long screw; 6. Fixed beam; 7. Column; 8. Lifting beam; 9. Steel wire rope; 10. Safety net; 11. Electromagnetic lock. DETAILED DESCRIPTION

[0018] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments, but the protection scope of the present invention is not limited thereto.

[0019] The safety protection system for high-voltage lines described in the present invention comprises a foundation and sliding beam system, a liftable crossbeam and protection safety net system, and an intelligent dynamic adjustment system.

[0020] The foundation and sliding beam system includes a concrete strip foundation 1, a steel plate 2, an H-shaped steel 3, a sliding support 4, a fixed cross beam 6, a long screw rod 5, and bolts.

[0021] like Figure 1 , 2 As shown in Figures 3 and 4, the concrete strip foundation 1 is cast with C25 concrete, with an overall thickness of 5 cm and a width of 1 m. The length is determined according to the length of the sliding track to be laid under the high-voltage line on site. The steel plate 2 is 1.5 cm thick, 80 cm long and 80 cm wide. Six holes are symmetrically reserved on the steel plate 2, and the hole diameter is 2.5 cm. Multiple steel plates 2 are embedded in the concrete strip foundation 1, arranged in the center in the width direction and one plate is arranged at intervals of 2 m in the length direction.

[0022] like Figure 2 , 3 As shown in Figure 5, the H-shaped steel 3 is used as the sliding track of the safety protection system, and its dimensions are: height 400mm, width 200mm, web thickness 8mm, flange thickness 13mm. The H-shaped steel 3 is welded and fixed to the pre-buried steel plate 2 below. The single section of the H-shaped steel 3 is 9m or 6m long, and multiple sections are connected by butt joints. The length is determined according to the length of the sliding track to be laid under the high-voltage line on site.

[0023] like Figure 3 , 6 As shown, the sliding support 4 is used as a sliding device of the safety protection system, and is slidably arranged on the H-shaped steel 3; the sliding support 4 is composed of a support shell 401, a transverse axis 402, a rolling bearing, and a steel roller 403; wherein, the "Wu"-shaped design of the support shell 401 ensures that it will not derail during sliding, three transverse axes 402 are arranged in the support shell 401, and the lower two transverse axes 402 (diameter 80mm) and the steel roller 404 are connected by fixed-end rolling bearings, the inner ring of the rolling bearing is welded and fixed to the transverse axis 402, and the outer ring is welded and fixed to the steel roller 404, the outer ring of the two steel rollers 404 has a diameter of 300mm and a wheel width of 40mm, which is used to bear the upper The main support for the truss load, the two steel rollers 404 at the bottom are respectively located on the lower flanges on both sides of the web of the H-shaped steel 3, and can roll along the lower flanges; the ends of the two horizontal axes 402 at the bottom also form lateral limits with the H-shaped steel 3; the upper horizontal axis 402 passes through the steel roller 404, and both ends are connected to the support shell 401, without a bearing in between, which is a secondary support for the upper truss load, and the upper steel roller 404 is located on the upper surface of the upper flange of the H-shaped steel 3, and can roll along the upper flange; the top structural style of the support shell 401 is the same as the size and style of the embedded steel plate 2 described above, and is also for locking and fixing by passing the long screw 5 through the upper and lower reserved holes in the later stage.

[0024] like Figure 2 , 3As shown in Figures 7 and 8, the fixed beam 6 adopts a truss structure, in which the horizontal rods are made of 42mm diameter steel pipes, and the straight web rods and diagonal web rods are made of 32mm diameter steel pipes. In order to meet the overall sliding movement of the safety protection system, the bottom of the horizontal rods on both sides of the fixed beam 6 are respectively welded and fixed to the top of the lower support shell 401. Special attention should be paid to the quality of the welding welds during construction. The functions of the fixed beam 6 include: connecting all sliding supports 4 to form a sliding beam system; providing a stable foundation for the columns of the safety protection system. In this embodiment, the dimensions of the fixed beam 6 are: 12m long and 50cm×50cm in cross section. The diagonal web rods are removed 3m away from both ends, and a 41.6cm×41.6cm space is reserved in advance for the subsequent socket columns 7 to ensure that the bottom of the column 7 is located on the sliding support 4.

[0025] The sliding support 4 and the fixed beam 6 together form a sliding beam system. The sliding beam system is 12m long and is connected to five sliding supports 4 (with a spacing of 2m) at the bottom. The traction of the safety protection system adopts two 3t winches, which are pulled by a 12mm diameter steel wire rope. The steel wire rope is connected to the horizontal rod of the fixed beam 6. The two winches are synchronously operated using a wireless remote control to achieve synchronous traction and stop on both sides, ensuring stable sliding of both sides of the safety protection system, avoiding truss distortion, and ensuring safety; Fig. 9 As shown, the locking operation of the sliding beam system is fastened by a long screw 5 and a bolt. The long screw 5 has a diameter of 2.5 cm, a length of 69.5 cm, an anchoring depth of 5 mm, and a cantilever height of 8 cm. The bolts are selected with matching specifications. When the top of the support shell 401 of the sliding support 4 and the steel plate 2 slide to be parallel to each other, the long screw 5 passes through the support shell 401 and the reserved holes on the steel plate 2, and is fixed with bolts to achieve the locking of the sliding beam system.

[0026] The liftable crossbeam and protective safety net system comprises a column 7, a liftable crossbeam 8, an electromagnetic lock 11, a steel wire rope 9, and a safety net 10.

[0027] like Figure 2As shown, the column 7 is used as the supporting structure of the safety protection system and the guide rail of the lifting beam 8. It adopts a steel truss structure. The column 7 is 20m high and has a cross section of 40cm×40cm. The vertical support rod of the column 7 adopts a 42mm diameter steel pipe, and the straight web and the diagonal web both adopt a 32mm diameter steel pipe. Before installing the column 7, the following preparations should be made in advance: stack two layers of beams (fixed beam 6 and lifting beam 8), install a protective safety net between the lifting beam 8; and hook the 5t electric hoist (4 in total) on the top horizontal rod of the column 7 in advance. When installing the column 7, a 25t truck crane is used for hoisting construction, and it is inserted and installed on the stacked fixed beam 6 and lifting beam 8. When hoisting, pay attention to setting a traction rope for control. After the installation is completed, the contact parts of the fixed beam 6 and the column 7 are fully welded and fixed. Steel bar welding can also be used to ensure a firm connection. After the installation of the column 7, a cable wind rope needs to be set for temporary fixation to prevent tipping.

[0028] like Figure 2 , 10 As shown, the lifting beam 8 has the same parameters as the fixed beam 6. The dimensions of the lifting beam 8 are: 12m long, 50cm×50cm in cross section, and the diagonal brace is removed 3m away from both ends, leaving a 41.6cm×41.6cm space in advance to receive the column 7. After the column 7 is installed, the electric hoist is controlled by a wireless remote control. One end of the electric hoist is connected to the lifting beam 8, and the other end is electrically pulled to achieve synchronous lifting and synchronous stopping of the lifting beam 8 until the lifting beam 8 reaches the designed height position; like Fig.10 As shown, the lower end of the electromagnetic lock 11 is fully welded on the horizontal steel pipe of the lifting beam 8, and four lifting beams 8 are set on one side. After the lifting beam 8 reaches the specified height, the electromagnetic lock 11 is controlled by the wireless remote control, and a 5cm lock tongue (2cm thick) is extended and stably supported on the horizontal rod of the column 7 to control the height of the lifting beam 8. If it needs to be lowered, the wireless remote control only needs to control the electric hoist to slightly lift it, then retract the lock tongue, and then relax and lower it; like Figure 2 As shown, the protective safety net is composed of a steel wire rope 9 and a safety net 10. The two sides of the steel wire rope 9 are fixed on the two ends of the lifting beam 8. During the stretching process of the steel wire rope 9, the tensile strength is strictly controlled, and it cannot be over-stretched or the tensile strength is insufficient. The top of the safety protection system frame is fully covered with a safety net 10 with fine insulating steel wire inside to achieve an insulation effect. The safety net 10 is tied with the steel wire rope 9 using a tie wire (1 knot per 1m). Corresponding signs such as high-voltage protection signs and light strips are also set on the column 7 to achieve a reminder and warning effect. Light strips are installed around the safety net 10, which has sufficient lighting effects at night to prevent construction equipment from exceeding the protection range of the high-voltage line at night.

[0029] The intelligent dynamic adjustment system includes sensors, background controllers, and alarm devices.

[0030] As a sensing device of the intelligent dynamic adjustment system, the sensor senses the surrounding environment, including thunderstorm weather, power supply sensing, height from the ground, etc.; it is installed at the midpoint of the steel wire rope 9 at both ends of the safety net 10 (two); when a thunderstorm weather signal or a power increase signal is received, or the height from the ground is greater than the specified value, the sensor will immediately collect data and transmit the signal to the background controller and alarm device at the same time.

[0031] The background controller and alarm device serve as intelligent dynamic adjustment system control devices. After receiving the sensor signal, the background controller immediately wirelessly controls the electric hoist to lower the height of the safety protection system, that is, intelligently and dynamically adjusts the height of the lifting beam 8 until the alarm is lifted, thereby achieving the purpose of dynamic control and dynamic adjustment of the safety height of the offline safety protection system.

[0032] The construction, operation and maintenance method of the safety protection system under the high-voltage line of the present invention comprises the following process: Taking the construction conditions under a 500KV high-voltage line as an example, the minimum height of the section suspension line is 25 meters, and the 500KV high-voltage line specification requires a safety distance of 8 meters. Therefore, the maximum height of the offline safety protection system is determined to be 17 meters; the offline safety protection area is planned to be deployed with a length of about 50 meters, and the safety protection system spans a range of about 20 meters, which can ensure safe construction in an area of ​​about 1,000 square meters offline.

[0033] Step 1: Construction of concrete strip foundation 1; According to the position of the sliding track, the outer edge line of the concrete strip foundation 1 is measured and laid out, and square steel is used as a temporary formwork to pour C25 concrete with a thickness of 5 cm, a width of 1 m, and a length of 50 m. The steel plate 2 is fixed in position in advance using the steel bar head, arranged in the center in the width direction (10 cm away from both sides of the concrete strip foundation 1), and a steel plate 2 is arranged at a distance of 2 m in the length direction. During the concrete pouring process, the steel plate 2 is pre-embedded in the concrete strip foundation 1 to ensure that the top surface of the steel plate 2 is flush with the finished surface of the concrete strip foundation 1. The size of the steel plate 2 is 1.5 cm thick, 80 cm long, and 80 cm wide. Six holes with a hole diameter of 2.5 cm are symmetrically reserved on the steel plate 2.

[0034] Step 2: Sliding track construction; H-shaped steel 3 is used as the sliding track of the safety protection system. The specifications of H-shaped steel 3 are 400×200×8×13mm (400mm height, 200mm width, 8mm web thickness, 13mm flange thickness). It is welded and fixed to the embedded steel plate 2 below. Special attention should be paid to the quality of welding welds during construction. In addition, H-shaped steel 3 is delivered to the site in eight sections of 9m and two sections of 6m, and is precisely connected and lengthened.

[0035] Step 3: Sliding beam system assembly and construction; The sliding beam system consists of a sliding support 4 and a fixed cross beam 6; the sliding support 4 is slidably arranged on the H-shaped steel 3 track. Seven sliding supports 4 are prefabricated according to the dimensions before construction and are slid into place along the sliding track on-site (installed at intervals of 2 meters); the "π"-shaped design of the support housing 401 ensures that derailment does not occur during sliding. At the end of the horizontal axis 402 at the lower inner part of the support housing 401, a lateral limit is also formed with the H-shaped steel 3. The fixed cross beam 6 adopts a truss structure, is prefabricated, and is hoisted by a 25t truck crane on-site. To meet the overall slidable movement of the safety protection system, the bottom parts of the horizontal bars on both sides of the fixed cross beam 6 are welded and fixed to the top of the support housing 401 respectively. Special attention should be paid to the welding seam quality during construction; the dimensions of the fixed cross beam 6 are: 12m in length (the two ends in the length direction are aligned with the outer edges of the sliding supports 4), and the cross section is 50cm×50cm (centered in the width direction and fixed on the sliding supports 4).

[0036] Step 4: Installation of the lifting cross beam 8 and the safety protection net The lifting cross beam 8 has the same dimensions and style as the fixed cross beam 6 and is also hoisted by a 25t truck crane. First, it is stacked vertically on the fixed cross beam 6; different from the fixed cross beam 6, the lifting cross beam 8 needs to install electromagnetic locks 11 at the position of the horizontal bars 3.25m away from both ends. The lower openings of the electromagnetic locks 11 are fully welded and fixed on the horizontal steel pipes of the lifting cross beam 8 (four electromagnetic locks 11 are set on a single lifting cross beam 8, two at each end). The safety protection net is composed of steel wire ropes 9 and safety nets 10. During the construction of the steel wire ropes 9, Q10 steel wire ropes are used for stretching, and both sides are fixed to the two ends of the lifting cross beam 8. During the stretching process of the steel wire ropes 9, the stretching strength is strictly controlled, and over-stretching or insufficient stretching strength is not allowed. The top of the safety protection system is fully covered with a safety net 10 with thin insulated steel wires threaded inside to achieve the insulation effect, and it is tied to the steel wire ropes 9 with binding wires (tied once every 1m).

[0037] Step 5: Hoisting of the column 7 The column 7 adopts a steel truss structure, with a height of 20m and a cross-sectional size of 40cm×40cm; the vertical support rods of the column 7 use steel pipes with a diameter of 42mm, and the straight web members and diagonal web members both use steel pipes with a diameter of 32mm. Before installing the column 7, the following preparations should be made in advance: ① Stack two layers of cross beams (the fixed cross beam 6 and the lifting cross beam 8) and install the safety protection net on the lifting cross beam 8; ② Hang the hook of a 5t electric hoist on the horizontal bar at the top of the column 7 in advance. When installing the column 7, it is hoisted by a 25t truck crane. During hoisting, attention should be paid to setting a traction rope for control. After installation, the contact part between the fixed cross beam 6 and the column 7 is fully welded and fixed, or steel bar side welding can also be adopted. Special attention should be paid to the welding seam quality during construction to ensure firm connection. After the column is installed, guy ropes should be set for temporary fixation to prevent tipping.

[0038] Step 6: Lift the lifting beam 8 and the protective safety net to the required height; After the installation of the column 7 is completed, the electric hoist is controlled by a wireless remote control. One end of the electric hoist is connected to the lifting beam 8, and the other end is electrically pulled to achieve the synchronous lifting and synchronous stopping of the lifting beams 8 and the protective safety net on both sides; when the lifting beam 8 is raised to the specified height of 17m, the electromagnetic lock 11 is controlled by the wireless remote control to extend a 5cm long lock tongue to ensure that the lifting beam 8 is stably supported on the horizontal rod of the column 7 to control the positioning height of the lifting beam 8.

[0039] Step 7: The safety protection system moves as a whole under the high-voltage line and is locked for use; The safety protection system is towed by two 3t winches and a 12mm steel wire rope 9, which is connected to the horizontal rod of the fixed beam 6. The two winches are operated synchronously using a wireless remote control to achieve synchronous traction and stop on both sides, thereby ensuring smooth sliding of both sides of the safety protection system, avoiding truss distortion, and ensuring safety. The locking operation of the sliding beam system is fastened by a long screw rod 5 and a bolt. After the sliding beam system slides into place, the long screw rod 5 is anchored into the reserved holes on the support housing 401 and the steel plate 2, and is fixed with bolts to achieve locking of the sliding beam system.

[0040] Step 8: Operation and maintenance; (1) Intelligent automatic sensing during construction; The sensors installed in the safety protection system can realize automatic sensing. When it receives thunderstorm weather, increased power supply, or the height of the protective safety net from the ground is greater than the specified value, it will immediately collect data and transmit signals to the background controller and alarm device at the same time. The background controller will immediately wirelessly control the electric hoist to lower the height of the safety protection system and intelligently and dynamically adjust the height of the lifting beam 8 until the automatic sensing data is safe and stable and the alarm is lifted.

[0041] (2) Offline assembly line construction; When the offline construction is completed, the next section of the construction is carried out in a continuous operation. Before the safety protection system moves as a whole, the lifting beam 8 and the protective safety net of the safety protection system are lowered in advance, and the electric hoist is slightly lifted by the wireless remote control, and the lock tongue is retracted, and then the lifting beam 8 is relaxed and lowered. When the lifting beam 8 falls on the fixed beam 6, the bolts and the long screw 5 are removed, and the wireless remote control is used to control the synchronous traction of the two winches to reach the next section, the long screw 5 is locked, and the safety protection system is lifted; when the safety protection system is raised, the height of the offline construction operation can be strictly controlled, and the offline machinery starts to enter the site for operation. The offline walking in the site is not affected by the high-voltage line, which saves the conventional safety disposal measures such as the on-site supervision of offline operation safety personnel and the pulling of large machinery measuring ropes; (3) Safety warning setting, inspection and maintenance; Since the high-voltage protection signs, light strips and other corresponding signs are set on the safety protection system columns 7, the effect of reminder and warning can be achieved. Light strips are installed around the safety net 10, which has sufficient lighting effect at night and can prevent construction equipment from exceeding the high-voltage line protection range at night. The project department conducts safety inspections to check whether the protection net of the safety protection system is damaged, whether there are alarms in the background data, whether the column 1 and the foundation connection, whether the sliding support 4 can be used normally, etc., and conducts multi-faceted self-inspection and self-correction, and promptly repairs and replaces problems found during the inspection to ensure the safety of offline construction operations.

[0042] The embodiments are preferred implementations of the present invention, but the present invention is not limited to the above-mentioned implementations. Any obvious improvements, substitutions or modifications that can be made by those skilled in the art without departing from the essential content of the present invention belong to the protection scope of the present invention.

Claims

1. A safety protection system for high voltage lines, characterized in that: The invention comprises a set of concrete strip foundations (1), wherein a plurality of steel plates (2) are embedded in the concrete strip foundations (1), and the top surface of the steel plates (2) is flush with the finished surface of the concrete strip foundations (1); the invention also comprises a sliding track, a sliding support (4), and a fixed beam (6), wherein the sliding track and the steel plate (2) are welded and fixed, a plurality of sliding supports (4) are slidably mounted on the sliding track, a truss-type fixed beam (6) is welded and fixed on the top of the sliding support (4), and the fixed beam (6) connects all the sliding supports (4) to form a sliding beam system, and the sliding beam system slides along the sliding track through the pulling of a winch, a steel wire rope (9), and a wireless remote controller; Space for truss-type columns (7) to be inserted into and inserted into the fixed crossbeam (6) is reserved near the two end positions of the fixed crossbeam (6), and the bottom of the column (7) is located on the sliding support (4), and the contact parts of the column (7) with the fixed crossbeam (6) and the sliding support (4) are welded and fixed; a truss-type lifting crossbeam (8) is also installed between the two columns (7) on the same side, and the lifting crossbeam (8) is pulled by an electric hoist controlled by a wireless remote control, slides up and down along the column (7) to adjust the height, and is locked and fixed to the column (7) by an electromagnetic lock (11) controlled by a wireless remote control; a protective safety net is installed between the lifting crossbeams (8) on both sides, and the protective safety net is located below the high-voltage line. The area below the protective safety net is an offline safe operation area, and a sensor is installed on the protective safety net, and the sensor is connected to the background controller and the alarm device signal.

2. The safety protection system for high-voltage lines according to claim 1, characterized in that: A plurality of holes are symmetrically reserved at the same positions on the steel plate (2) and the sliding support (4). After the sliding beam system slides into place, the long screw rod (5) passes through the holes on the steel plate (2) and the sliding support (4) in sequence and is then locked and fixed by a nut, thereby achieving locking of the sliding beam system.

3. The safety protection system for high-voltage lines according to claim 1, characterized in that: The sliding track adopts a plurality of H-shaped steels (3) connected by butt joint. The sliding support (4) comprises a "Wu"-shaped support shell (401). Three transverse shafts (402) are arranged in the support shell (401). The two lower transverse shafts (402) are connected to steel rollers (404) via rolling bearings. The inner ring of the rolling bearing is welded to the transverse shaft (402), and the outer ring is welded to the steel rollers (404). The steel rollers (404) on the two lower transverse shafts (402) are respectively located on the lower flanges on both sides of the web of the H-shaped steel (3) and roll along the lower flanges. The ends of the two lower transverse shafts (402) also form lateral limit with the H-shaped steel (3). A steel roller (404) is also installed in the middle of the upper transverse shaft (402), and the two ends are connected to the support shell (401). The steel roller (404) on the upper transverse shaft (402) is located on the upper surface of the upper flange of the H-shaped steel (3) and rolls along the upper flange.

4. The safety protection system for high-voltage lines according to claim 1, characterized in that: The protective safety net is composed of a steel wire rope (9) and a safety net (10). The top of the safety protection system frame is fully covered with a safety net (10) with fine insulating steel wires inserted inside. The safety net (10) is tied with the steel wire rope (9) using a tie wire, and both ends of the steel wire rope (9) are fixed on the lifting beam (8).

5. The safety protection system for high-voltage lines according to claim 1, characterized in that: The upright column (7) is provided with a high-voltage protection sign, a reflective strip is attached thereto, and a light strip is installed around the protective safety net.

6. A construction and operation method for a safety protection system under a high-voltage line according to claim 1, characterized in that: The process includes the following: Step 1: Construction of concrete strip foundation (1) and internal embedded steel plate (2); Measure and lay out, use square steel as temporary formwork, and pour concrete; use steel bar heads to fix the steel plate (2) in place in advance, center it in the width direction, and evenly space it in the length direction; Step 2: Sliding track construction; Using multiple sections of butt-jointed long H-shaped steel (3) as sliding rails, and welding and fixing them to the steel plate (2); Step 3: Sliding beam system assembly and construction; The sliding beam system is composed of a sliding support (4) and a fixed beam (6); first, a plurality of sliding supports (4) are sequentially slid in along the sliding track and arranged evenly at intervals; then, the fixed beam (6) processed in advance is hoisted onto the sliding support (4) by using a car crane, and is welded and fixed to the top of the sliding support (4); the fixed beam (6) is aligned with the outer edges of the sliding support (4) at both ends in the length direction, and is fixed to the sliding support (4) in the center in the width direction; Step 4: Install the lifting beam (8) and the protective safety net; The lifting beam (8) and the fixed beam (6) are of the same size and type. Two electromagnetic locks (11) are first installed near the two ends of each lifting beam (8), and then hoisted and stacked on the fixed beam (6) using a car crane; the protective safety net is composed of steel wire ropes (9) and a safety net (10), and is installed between the lifting beams (8), wherein the safety net (10) is tied to the steel wire ropes (9) on both sides by tying wires, and the steel wire ropes (9) are fixed on the lifting beam (8); Step 5: Lifting the column (7); First, the electric hoist hook is hung on the horizontal rod at the top of the column (7) in advance, and then the column (7) is hoisted by a truck crane, and the column (7) is hoisted and inserted into the lifting beam (8) and the fixed beam (6) with the bottom located on the sliding support (4). During the hoisting, a traction rope is set for control. After the hoisting is completed, the contact parts of the fixed beam (6), the sliding support (4) and the column (7) are welded and fixed, and finally a cable wind rope is set for temporary fixation; Step 6: Lift the lifting beam (8) and the protective safety net to the required height; After the column (7) is installed, the electric hoist is controlled by wireless remote control. One end of the electric hoist is connected to the lifting beam (8), and the other end is electrically pulled to synchronously lift and stop the lifting beams (8) and the protective safety net on both sides. After lifting to a specified height, the electromagnetic lock (11) is controlled by wireless remote control to extend the lock tongue to control the positioning height of the lifting beam (8); Step 7: The safety protection system moves as a whole under the high-voltage line and is locked for use; The safety protection system is pulled by two winches in cooperation with a steel wire rope (9), the steel wire rope (9) is connected to a horizontal rod of a fixed crossbeam (6), and the two winches are synchronously operated using a wireless remote controller to achieve synchronous pulling and stopping on both sides. After pulling into place, the sliding beam system is fastened and locked by a long screw rod (5) and a bolt; Step 8: Operation and maintenance of the security protection system.

7. The construction and operation method according to claim 6, characterized in that: The step 8 comprises: The sensor automatically senses and transmits a signal to the background controller and the alarm device when receiving a signal of thunderstorm weather, power increase, or the height of the protective safety net from the ground is greater than the specified value. The background controller immediately wirelessly remotely controls the electric hoist to lower the height of the safety protection system and intelligently and dynamically adjusts the height of the lifting beam (8) until the automatic sensing data is safe and stable and the alarm is lifted; After the offline construction of the current section is completed, the next section is constructed in a continuous operation. The lifting beam (8) and the protective safety net are lowered in advance by wireless remote control. After the lifting beam (8) falls on the fixed beam (6), the bolts and the long screw (5) are removed. The wireless remote control is used to control the two winches to synchronously pull the sliding beam system to the next section. The long screw (5) is then locked and the lifting beam (8) and the protective safety net are lifted again to the specified height. The offline machinery begins to enter the site for operation. During the construction process, the high-voltage protection signs and reflective strip signs on the columns (7) provide a warning effect, and the light strips around the safety net (10) provide lighting at night to prevent construction equipment from exceeding the protection range of the high-voltage line at night. The project department conducts safety inspections to check whether the protection net of the safety protection system is damaged, whether there are any alarms in the background data, whether the connection between the columns (7) and the foundation is normal, and whether the sliding support (4) is in normal use. If any problems are found, they will be repaired and replaced in time.

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