A lifting device for communication equipment

Abstract

The present invention relates to a lifting device for communication equipment, belonging to the technical field of communication lifting towers, comprising a lifting tower, a passenger box and a pulley assembly arranged in the communication equipment; a lifting space is arranged in the lifting tower, and the passenger box is lifted and lowered in the lifting space; the pulley assembly is installed in the lifting tower, and the passenger box is connected to at least one group of pulley assemblies; the second fixed pulley is driven to rotate after being connected with a mobile temporary driving source, the first movable pulley and the first fixed pulley form a lifting assembly, the second movable pulley and the second fixed pulley form a descending assembly, the second fixed pulley rotates clockwise to reduce the steel cables in the lifting assembly area, and increase the steel cables in the descending assembly area, thereby lifting the passenger box; the second fixed pulley rotates counterclockwise to reduce the steel cables in the descending assembly area, and increase the steel cables in the lifting assembly area, thereby descending the passenger box. The pulley assembly of the present application has a simple structure, and can reduce cost investment even in the operation and maintenance of a large number of base stations, and can effectively save costs and improve resource utilization.

Description

Technical Field

[0001] The invention belongs to the technical field of communication lifting towers, and in particular relates to a lifting device for communication equipment. Background Art

[0002] The communication equipment is provided with an inspection channel inside, and the equipment can be moved to the part to be inspected through the lifting device in the inspection channel. In order to facilitate the inspection, the existing communication towers usually install lifting devices on the communication towers to transport the spare parts and inspection equipment to the high places of the communication towers.

[0003] For example, publication number CN210559216U discloses a communication engineering tower, comprising a tower body and a steel cable retracting device; the interior of the tower body is hollow, an operating platform is provided on the side of the upper end of the tower body, a mounting plate is provided on the top of the tower body, door openings are provided on the sides of the upper and lower ends of the tower body, and the side walls of the door openings at the upper and lower ends of the tower body are rotatably connected to the side of the protective door; the steel cable retracting device comprises a drum, a steel cable, a steering pulley, a connecting plate and a motor, two connecting plates are provided, the two connecting plates are both arranged on the rear side of the mounting plate, and the inner sides of the two connecting plates are rotatably connected to the side surfaces at both ends of the drum, the steering pulley is fixed to the middle part of the upper surface of the mounting plate through a fixing seat, and the output shaft of the motor passes through the side of the connecting plate and is fixedly connected to the side of the right end of the drum; by arranging the steel cable retracting device, the lifting plate can be conveniently raised and lowered and the maintenance personnel can be quickly and labor-savingly transported to the top operating platform.

[0004] As mentioned above, in the construction or maintenance of traditional communication towers, the transportation of medium and large parts is carried out by people climbing vertical ladders or pulling them up with pulleys. Regardless of whether it is manual climbing or pulley lifting, the stability of the lifting equipment is poor and it is easy to bump. Because the existing pulleys usually rise and fall by winding, the winding of the cable can easily affect the stability of the operation.

[0005] Moreover, there are a large number of base stations. If each communication tower is equipped with a lifting device, it will inevitably increase a lot of cost investment. In particular, when lifting needs to be achieved through a pulley assembly, a fixed connected driving source is required to drive the steel cable to reel in and out. The most expensive part of the lifting device is the power source. Therefore, if a power source is installed in each base station, it will not only lead to high cost investment, but also low utilization of the lifting equipment and waste of resources.

[0006] Therefore, there is a need for a communication equipment lifting device with a simple structure and low cost. Summary of the invention

[0007] In order to solve the above problems existing in the prior art, the present invention provides a lifting device for communication equipment, which solves the problem that the lifting device provided in the existing communication equipment has high cost and low utilization rate.

[0008] The purpose of the present invention can be achieved through the following technical solutions:

[0009] A lifting device for communication equipment, comprising a lifting tower, a passenger box and a pulley assembly arranged in the communication equipment; a lifting space is arranged in the lifting tower, and the passenger box is lifted and lowered in the lifting space; the pulley assembly is installed in the lifting tower, and the passenger box is connected to at least one group of the pulley assemblies;

[0010] The pulley assembly comprises a steel cable, a first fixed pulley, a second fixed pulley, a first movable pulley and a second movable pulley; two ends of the steel cable are respectively anchored at the upper part and the lower part of the same side of the lifting tower, the first fixed pulley and the second fixed pulley are respectively installed at the upper part and the lower part of the same side of the lifting tower, and the first fixed pulley and the second fixed pulley are located on the opposite side of the steel cable anchoring section, and the first movable pulley and the second movable pulley are respectively installed at the upper part and the lower part of the passenger box; the steel cable sequentially passes around the lower part of the first movable pulley and the upper part of the first fixed pulley, and then passes around the lower part of the second fixed pulley and the upper part of the second movable pulley;

[0011] The second fixed pulley is connected to a mobile temporary driving source and driven to rotate. The first movable pulley and the first fixed pulley form a lifting assembly, and the second movable pulley and the second fixed pulley form a lowering assembly. The second fixed pulley rotates clockwise to reduce the steel cables in the lifting assembly area and increase the steel cables in the lowering assembly area to lift the passenger box; the second fixed pulley rotates counterclockwise to reduce the steel cables in the lowering assembly area and increase the steel cables in the lifting assembly area to lower the passenger box.

[0012] Preferably, the total length of the steel cable remains unchanged and the first movable pulley and the second movable pulley move between the first fixed pulley and the second fixed pulley and the two anchor points.

[0013] Preferably, the steel cable is slidingly connected to the two fixed pulleys and the two movable pulleys.

[0014] Preferably, a balancing component is provided at the lower part of the passenger box, and the balancing component is used to limit the rotation speed of the second movable pulley; the balancing component includes a hydraulic component and two balancing plates; the two balancing plates are symmetrically arranged on both sides of the second movable pulley, and the hydraulic component is used to drive the two balancing plates to approach and abut the second movable pulley.

[0015] Preferably, the hydraulic assembly includes a pedal, a hydraulic chamber, a piston and a mounting seat; the mounting seat is fixedly mounted on the bottom of the passenger box, the pedal is arranged in the standing area at the bottom of the passenger box and is connected from the passenger box to the mounting seat through the hydraulic chamber; the piston is slidably mounted on the mounting seat and is connected to the hydraulic chamber, one of the balancing plates is fixedly mounted on the mounting seat, and the other balancing plate is fixedly connected to the piston.

[0016] Preferably, rotating shafts are coaxially arranged on both sides of the second movable pulley, and the rotating shaft is connected to the second movable pulley; it also includes a limit assembly, which is coaxially connected to the rotating shaft and is used to drive the balancing plate and the rotating shaft to move relative to each other when the passenger box descends; the limit assembly includes a connecting block, a limit piece and a ratchet block; the connecting block is fixedly connected to the rotating shaft, and the connecting block has an installation groove recessed toward the center of the rotating shaft, the limit piece is arranged in the installation groove, the ratchet block is fixedly connected to the balancing plate, and a ratchet groove is arranged on the side of the ratchet block close to the connecting block, and the ratchet groove is used to limit the horizontal movement of the ratchet block.

[0017] Preferably, the limiting member includes a clamping block and a spring block, both of which are rotatably connected to the connecting block, and the clamping block is located on the outside of the spring block and is clamped with the ratchet groove, and the clamping block abuts against the clamping block from the inside of the spring block; the clamping block is also provided with a counterclockwise clamping portion, which extends to the rotating shaft, and the rotating shaft is provided with ratchet teeth, and the counterclockwise clamping portion is limitedly matched with the ratchet teeth.

[0018] Preferably, the temporary driving source is detachably connected to the second fixed pulley.

[0019] Preferably, the lifting tower is provided with at least two vertical guide grooves, and the passenger box is provided with guide blocks matching the guide grooves, and the guide blocks slide in the guide grooves.

[0020] The beneficial effects of the present invention are:

[0021] The present application fixes the pulley assembly in the lifting tower. When maintenance is required, the temporary driving source is connected to the second fixed pulley. The lifting or lowering of the lifting box is achieved by the clockwise and counterclockwise rotation of the second fixed pulley. The pulley assembly relies on closed-loop activity and does not require winding. It can better cooperate with the drive of the temporary driving source to achieve stable operation of the box. The pulley assembly has a simple structure, which can reduce cost investment even in the operation and maintenance of a large number of base stations and can effectively save costs and improve resource utilization. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0023] Figure 1 It is a schematic diagram of the structure of the lifting device in the lifting state provided in one embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the lifting device in a descending state provided in one embodiment of the present invention;

[0025] Figure 3A schematic diagram of the connection structure of the equalizing component and the hydraulic component provided in one embodiment of the present invention;

[0026] Figure 4 It is a schematic diagram of the structure of a limit assembly provided in one embodiment of the present invention;

[0027] Figure 5 It is a schematic diagram of the connection structure between the second fixed pulley and the temporary mobile source provided in one embodiment of the present invention;

[0028] Legend: 1. Lifting tower; 11. Lifting space; 12. Guide groove; 2. Passenger box; 31. Steel cable; 321. First fixed pulley; 322. Second fixed pulley; 331. First movable pulley; 332. Second movable pulley; 4. Temporary driving source; 5. Balancing assembly; 51. Balancing plate; 521. Pedal; 522. Hydraulic chamber; 523. Piston; 524. Mounting seat; 6. Rotating shaft; 61. Ratchet teeth; 71. Connecting block; 711. Mounting groove; 721. Clamping block; 722. Spring block; 723. Counterclockwise clamping portion; 73. Ratchet block; 731. Ratchet groove. DETAILED DESCRIPTION

[0029] In order to further explain the technical means and effects adopted by the present invention to achieve the predetermined invention purpose, the specific implementation methods, structures, features and effects of the present invention are described in detail below in conjunction with the accompanying drawings and preferred embodiments.

[0030] like Figure 1-Figure 5 As shown, a lifting device for communication equipment comprises a lifting tower 1, a passenger box 2 and a pulley assembly arranged in the communication equipment; a lifting space 11 is arranged in the lifting tower 1, and the passenger box 2 is lifted and lowered in the lifting space 11; the pulley assembly is installed in the lifting tower 1, and the passenger box 2 is connected to at least one set of pulley assemblies;

[0031] The pulley assembly includes a steel cable 31, a first fixed pulley 321, a second fixed pulley 322, a first movable pulley 331 and a second movable pulley 332; the two ends of the steel cable 31 are anchored at the upper and lower parts of the same side of the lifting tower 1, respectively; the first fixed pulley 321 and the second fixed pulley 322 are respectively installed at the upper and lower parts of the same side of the lifting tower 1 and are located on the side opposite to the anchoring section of the steel cable 31; the first movable pulley 331 and the second movable pulley 332 are respectively installed at the upper and lower parts of the passenger box 2; the existing base station lifting equipment usually uses a motor to reel in or unreel the cable to realize the lifting function of the lifting device, but due to the large number of base stations, and if the motor is reeled in or unreeled, it means that each base station needs to be fixedly installed with a complete lifting device, including cables, pulleys, and driving motors for lifting, but the base station does not need to be repaired every day, such an approach will result in serious waste of resources and increased cost investment;

[0032] The lifting device in this embodiment does not need to be installed with a fixed driving source. It only needs to connect the temporary driving source 4 with the good lifting device during maintenance to achieve lifting and can ensure the smooth operation of the box 2.

[0033] In the initial state, the steel cable 31 is passed around the lower part of the first movable pulley 331, the upper part of the first fixed pulley 321, the lower part of the second fixed pulley 322 and the upper part of the second movable pulley 332 to form a closed loop system, and the passenger box 2 is fixedly connected to the first movable pulley 331 and the second movable pulley 332;

[0034] When the passenger box 2 needs to be lifted, the mobile temporary driving source 4 is connected and drives the second fixed pulley 322 to rotate clockwise. Since the steel cable 31 is a closed loop, the clockwise rotation of the second fixed pulley 322 will reduce the steel cable 31 in the lifting component area, that is, the steel cable 31 is tightened, and at the same time, the steel cable 31 in the lowering component area increases. This change causes the passenger box 2 to be pulled upward, thereby achieving lifting;

[0035] On the contrary, when the passenger box 2 needs to be lowered, the mobile temporary driving source 4 drives the second fixed pulley 322 to rotate counterclockwise, so that the steel cables 31 in the lowering component area are reduced, that is, the steel cables 31 are pulled closer to the second movable pulley 332, and at the same time, the steel cables 31 in the lifting component area are increased. This change causes the passenger box 2 to be pulled downward, thereby achieving lowering; and no matter whether it is raised or lowered, the lifting component and the lowering component both generate a traction force on each other, so as to achieve the smooth operation of the passenger box 2;

[0036] Through the cooperation of the pulley assembly and the mobile temporary drive source 4, the passenger box 2 can be raised and lowered quickly and smoothly, so that the spare parts equipment can smoothly reach the top of the base station. Since a mobile temporary drive source 4 is used, the position of the temporary drive source 4 can be adjusted at any time as needed to adapt to different maintenance scenarios and needs. This flexibility makes the maintenance work more convenient and efficient; the structure of the pulley assembly is relatively simple and easy to maintain and replace. When a pulley fails, it can be quickly replaced without affecting the normal operation of the entire lifting device, which helps to ensure the continuity and stability of the base station maintenance work.

[0037] In summary, the present application fixes the pulley assembly in the lifting tower 1. When maintenance is required, the temporary drive source 4 is connected to the second fixed pulley 322. The lifting or lowering of the lifting box 2 is achieved by the clockwise and counterclockwise rotation of the second fixed pulley 322. The pulley assembly relies on closed-loop activity and does not need to be reeled in, so it can better cooperate with the drive of the temporary drive source 4 to achieve stable operation of the box 2. The pulley assembly has a simple structure, which can reduce cost investment and improve resource utilization even in the operation and maintenance of a large number of base stations.

[0038] In one embodiment, the total length of the steel cable 31 remains unchanged and the first movable pulley 331 and the second movable pulley 332 move between the first fixed pulley 321, the second fixed pulley 322 and the two anchor points; in a traditional pulley system, the length of the steel cable 31 may change with the lifting operation, and an additional mechanism is required to manage the extension or shortening of the steel cable 31, that is, the winding of the steel cable 31, while in this embodiment, the total length of the steel cable 31 remains unchanged, that is, during the lifting process, the extension or shortening of the steel cable 31 is strictly limited, thereby ensuring the smoothness and accuracy of the lifting and lowering, reducing maintenance costs, and at the same time, the length of the steel cable 31 is limited, and whether it is lifting or lowering, the lifting component and the lowering component both generate a traction force on each other, making the operation of the passenger box 2 more stable.

[0039] In one embodiment, the steel cable 31 is slidingly connected to the first fixed pulley 321, the second fixed pulley 322, the first movable pulley 331 and the second movable pulley 332. In the traditional connection method between the steel cable 31 and the pulley, an additional winding mechanism is usually required to manage the extension or shortening of the steel cable 31, that is, the winding of the steel cable 31. These winding mechanisms not only increase the complexity of the system, but may also introduce additional failure points. In this embodiment, the sliding connection method reduces complex components such as the winding mechanism, so the failure points of the system are also reduced accordingly, which helps to reduce the safety risks caused by system failures; therefore, in the present application, the steel cable 31 is slidingly connected to the pulley, reducing complex components such as the winding mechanism, so the maintenance cost of the system is also reduced accordingly; at the same time, in the traditional winding connection method, the extension or shortening of the steel cable 31 requires a certain amount of time to operate the winding mechanism, while the sliding connection method does not require this process, thereby reducing the time of the lifting and lowering operation.

[0040] In one embodiment, a balancing component 5 is provided at the lower part of the passenger box 2. The main function of the balancing component 5 is to limit the rotation speed of the second movable pulley 332, thereby realizing the control of the descending speed of the passenger box 2. The balancing component 5 includes a hydraulic component and two balancing plates 51. The two balancing plates 51 are symmetrically arranged on both sides of the second movable pulley 332. When the passenger box 2 needs to descend, the second movable pulley 332 starts to rotate, and the hydraulic component drives the two balancing plates 51 to approach and abut against the second movable pulley 332, thereby generating a certain resistance. This resistance can limit the rotation speed of the second movable pulley 332, thereby slowing down the descending speed of the passenger box 2. As the passenger box 2 descends, the gravitational potential energy of the passenger box 2 is converted into kinetic potential energy, so that The descending speed becomes larger. Therefore, in order to balance the dynamic potential energy and make the passenger box 2 descend at a uniform speed, the hydraulic component in this embodiment can adjust the driving force of the balancing plate 51 as needed, thereby changing the resistance of the balancing plate 51 to the second movable pulley 332. The hydraulic component increases the driving force of the balancing plate 51, so that the resistance of the balancing plate 51 to the second movable pulley 332 increases, the rotation speed of the second movable pulley 332 decreases, and the descending speed of the passenger box 2 slows down. It is worth mentioning that the abutment of the two balancing plates 51 to the second movable pulley 332 by the hydraulic component is realized by adopting the existing technology similar to the principle of the brake disc, so it is not necessary to elaborate on how the two balancing plates 51 are synchronously abutted to the second movable pulley 332.

[0041] In one embodiment, the hydraulic assembly includes a pedal 521, a hydraulic chamber 522, a piston 523 and a mounting seat 524; the mounting seat 524 is fixedly installed at the bottom of the passenger box 2, and the pedal 521 is set in the standing area at the bottom of the passenger box 2 to control the hydraulic output according to the weight of the transported parts and equipment. The pedal 521 is connected from the passenger box 2 to the mounting seat 524 through the hydraulic chamber 522, and the pressure is transmitted to the piston 523 through the hydraulic chamber 522, playing a role in transmitting pressure. The piston 523 is slidably installed on the mounting seat 524 and is connected to the hydraulic chamber 522. When the pressure in the hydraulic chamber 522 increases, the piston 523 will move under the pressure. A balancing plate 51 is fixedly installed on the mounting seat 524. , another balancing plate 51 is fixedly connected to the piston 523. When the piston 523 moves, it will drive the balancing plate 51 connected to it to move together and abut against the balancing plate 51. The size of the resistance with the balancing plate 51 is determined by the weight of the transport parts equipment. After the transport parts equipment is placed on the pedal 521, the resistance generated by the hydraulic component will counteract this pulling force, thereby slowing down the descending speed of the passenger box 2. Limiting the descending speed of the passenger box 2 can also reduce the wear and fatigue of the pulley assembly, the hydraulic assembly and the passenger box 2 itself due to high-speed movement; limiting the descending speed of the passenger box 2 can also reduce the wear and fatigue of the pulley assembly, the hydraulic assembly and the passenger box 2 itself due to high-speed movement.

[0042] In one embodiment, a rotating shaft 6 is coaxially arranged on both sides of the second movable pulley 332, and the rotating shaft 6 is connected to the second movable pulley 332; it also includes a limit assembly, which is coaxially connected to the rotating shaft 6 and is used for relative movement of the balancing plate 51 and the rotating shaft 6 when the box 2 descends; the limit assembly includes a connecting block 71, a limit piece and a ratchet block 73; the connecting block 71 is fixedly connected to the rotating shaft 6, and the connecting block 71 has a mounting groove 711 recessed toward the center of the rotating shaft 6, the limit piece is arranged in the mounting groove 711, the ratchet block 73 is fixedly connected to the balancing plate 51, and the ratchet block A ratchet groove 731 is provided on one side of 73 close to the connecting block 71, and the ratchet groove 731 is used to limit the horizontal movement of the ratchet block 73; the connecting block 71 is fixedly connected to the rotating shaft 6 to form a stable structure, and a mounting groove 711 is recessed on the connecting block 71 toward the center of the rotating shaft 6, and the mounting groove 711 provides an installation position for the limit member, and the limit member is arranged in the mounting groove 711. Its main function is to limit the ratchet block 73 from driving the balancing plate 51 to move in the horizontal direction, because the gravitational potential energy is converted into dynamic potential energy only when descending, therefore, it is necessary to When descending, the rotation speed of the second movable pulley 332 is limited, and the rotation direction of the second movable pulley 332 is opposite when lifting and descending. In the initial state, the limit member is clamped in the ratchet groove 731, so that the balance plate 51, the ratchet block 73, and the connecting block 71 are fixedly connected to limit the movement of the balance plate 51. The connecting block 71 is slidably connected with the rotating shaft 6, so that the rotating shaft 6 rotates with the second movable pulley 332. Therefore, the second movable pulley 332 drives the rotating shaft 6 to rotate clockwise to lift the passenger box 2; and when the passenger box 2 starts to descend, the second movable pulley 332 drives the rotating shaft 6 to rotate clockwise. 6 rotates counterclockwise, and the rotating shaft 6 drives the mounting block to rotate counterclockwise. At this time, the ratchet block 73 and the limit block move towards each other, and the limit piece gradually disengages from the ratchet groove 731, notifying the limit block to rotate around and engage with the rotating shaft 6. At this time, the balancing block is fixedly connected to the ratchet block 73, and the limit piece is engaged with the rotating shaft 6 along with the connecting block 71 and rotates with the rotating shaft 6. After the ratchet block 73 loses the limit of the limit piece, it moves toward the second movable pulley 332 under the action of the hydraulic assembly and abuts against the second movable pulley 332, thereby generating resistance and limiting the descending speed of the passenger box 2.

[0043] When the cam 721 is in the state of being rotated, the cam 721 is in the state of being rotated, and the cam 721 is in the state of being rotated, and the cam 721 is in the state of being rotated, and the cam 721 is in the state of being rotated, and the cam 721 is in the state of being rotated. 3 is limitedly matched with the ratchet teeth 61, and the opening directions of the ratchet teeth 61 and the ratchet groove 731 are opposite; when rotating clockwise, the clamping block 721 is clamped with the ratchet groove 731, and the counterclockwise clamping portion 723 is disconnected from the ratchet teeth 61, so that the connecting block 71 is rotatably connected with the rotating shaft 6, and when rotating counterclockwise, the clamping block 721 is disconnected from the ratchet groove 731, and the counterclockwise clamping portion 723 is engaged with the ratchet teeth 61. At this time, the connecting block 71 is clamped with the rotating shaft 6 and rotates counterclockwise with the second movable pulley 332, while the ratchet block 73 loses the clamping and moves toward the second movable pulley 332 under the action of the balancing plate 51; the limiting member has high versatility and flexibility, can realize the connection object of the connecting block 71, and cooperate to complete the restriction and movement of the balancing plate 51.

[0044] In one embodiment, the temporary drive source 4 is detachably connected to the second fixed pulley 322. The temporary drive source 4 is mobile and can be transferred from one base station to another as needed, which enables spare parts to be quickly switched between multiple base stations, thereby improving overall maintenance efficiency. The traditional pulley drive method may require a dedicated drive device for each base station, which increases the equipment investment cost, while the mobile temporary drive source 4 can be shared, reducing the number of equipment and thus reducing costs.

[0045] In one embodiment, the lifting tower 1 is provided with at least two vertical guide grooves 12, and the passenger box 2 is provided with guide blocks matching the guide grooves 12, and the guide blocks slide in the guide grooves 12; the guide grooves 12 provide a clear moving path for the passenger box 2; the passenger box 2 is equipped with guide blocks matching the guide grooves 12, and the guide blocks can be tightly embedded in the guide grooves 12, and slide in the grooves as the passenger box 2 moves up and down; when the lifting tower 1 is started and drives the passenger box 2 to rise or fall, the guide blocks slide smoothly along the trajectory of the guide grooves 12, and the vertical design of the guide grooves 12 ensures the stable movement of the passenger box 2 in the vertical direction, avoiding lateral deviation or instability. At the same time, the close fit between the guide blocks and the guide grooves 12 also effectively reduces the shaking of the passenger box 2 during movement, further improving the stability and safety of the overall structure.

[0046] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment as above, it is not used to limit the present invention. Any technical personnel in this field can make some changes or modify the technical contents disclosed above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any brief modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A lifting device for communication equipment, characterized in that: It comprises a lifting tower, a passenger box and a pulley assembly arranged in a communication device; a lifting space is arranged in the lifting tower, and the passenger box is lifted and lowered in the lifting space; the pulley assembly is installed in the lifting tower, and the passenger box is connected to at least one group of the pulley assemblies; The pulley assembly comprises a steel cable, a first fixed pulley, a second fixed pulley, a first movable pulley and a second movable pulley; two ends of the steel cable are anchored at the upper and lower parts of the same side of the lifting tower, respectively; the first fixed pulley and the second fixed pulley are respectively mounted at the upper and lower parts of the same side of the lifting tower, and the first fixed pulley and the second fixed pulley are located on the opposite side of the steel cable anchoring section; the first movable pulley and the second movable pulley are respectively mounted at the upper and lower parts of the riding box; the steel cable sequentially passes around the lower part of the first movable pulley and the upper part of the first fixed pulley, and then passes around the lower part of the second fixed pulley and the upper part of the second movable pulley; the second fixed pulley is connected and driven to rotate by a mobile temporary driving source, the first movable pulley and the first fixed pulley form a lifting assembly, the second movable pulley and the second fixed pulley form a descending assembly, the second fixed pulley rotates clockwise to reduce the steel cable in the lifting assembly area, increase the steel cable in the descending assembly area, and lift the riding box; the second fixed pulley rotates counterclockwise to reduce the steel cable in the descending assembly area, increase the steel cable in the lifting assembly area, and descend the riding box; The lower part of the passenger box is provided with a balancing component, and the balancing component is used to limit the rotation speed of the second movable pulley; the balancing component includes a hydraulic component and two balancing plates; the two balancing plates are symmetrically arranged on both sides of the second movable pulley, and the hydraulic component is used to drive the two balancing plates to approach and abut the second movable pulley; rotating shafts are coaxially arranged on both sides of the second movable pulley, and the rotating shaft is connected to the second movable pulley; it also includes a limiting component, which is coaxially connected to the rotating shaft and is used to drive the balancing plate and the rotating shaft to move relative to each other when the passenger box descends; the limiting component includes a connecting block, a limiting member and a ratchet block; the connecting block is fixedly connected to the rotating shaft, and the connecting block An installation groove is recessed toward the center of the rotating shaft, and the limiting member is arranged in the installation groove. The ratchet block is fixedly connected to the balancing plate, and a ratchet groove is arranged on the side of the ratchet block close to the connecting block, and the ratchet groove is used to limit the horizontal movement of the ratchet block; the limiting member includes a clamping block and a spring block, and the clamping block and the spring block are both rotatably connected to the connecting block, and the clamping block is located on the outer side of the spring block and clamped with the ratchet groove, and the clamping block abuts against the clamping block from the inner side of the spring block; the clamping block is also provided with a counterclockwise clamping portion, and the counterclockwise clamping portion extends to the rotating shaft, and the rotating shaft is provided with ratchet teeth, and the counterclockwise clamping portion is limitedly matched with the ratchet teeth.

2. A lifting device for communication equipment according to claim 1, characterized in that: The total length of the steel cable does not change and the first movable pulley and the second movable pulley move between the first fixed pulley and the second fixed pulley and the two anchor points.

3. The lifting device of a communication device according to claim 1, characterized in that: The steel cable is in sliding connection with the two fixed pulleys and the two movable pulleys.

4. The lifting device for communication equipment according to claim 1, characterized in that: The hydraulic assembly includes a pedal, a hydraulic chamber, a piston and a mounting seat; the mounting seat is fixedly installed at the bottom of the passenger box, the pedal is arranged in the standing area at the bottom of the passenger box and is connected from the passenger box to the mounting seat through the hydraulic chamber; the piston is slidably installed on the mounting seat and is connected with the hydraulic chamber, one balancing plate is fixedly installed on the mounting seat, and the other balancing plate is fixedly connected to the piston.

5. The lifting device for communication equipment according to claim 1, characterized in that: The temporary driving source is detachably connected to the second fixed pulley.

6. The lifting device for communication equipment according to claim 1, characterized in that: The lifting tower is provided with at least two vertical guide grooves, and the passenger box is provided with guide blocks matching the guide grooves, and the guide blocks slide in the guide grooves.

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