Detachable reinforcement cage shielding cover

Abstract

The invention provides a detachable reinforcement cage shielding cover. The detachable reinforcement cage shielding cover comprises a detachable shielding structure, a flexible shielding structure and a detachable grounding structure. The detachable shielding structure comprises a columnar shielding shell and a dome-shaped plate which is detachably assembled at the top of the columnar shielding shell, the columnar shielding shell comprises a plurality of arc-shaped plates which are detachably arranged on the periphery of the reinforcement cage, and the inner surfaces of the arc-shaped plates are provided with elastic insulating buffer pads; the dome-shaped plate comprises a dome bottom plate and a dome cover; the flexible shielding structure comprises a central rotating assembly and a lifting assembly; the detachable grounding structure comprises a grounding pile and a grounding lead, one end of the grounding lead is connected with the grounding pile, and the other end of the grounding lead is connected with a reserved lead on the cylindrical shielding shell through an aviation plug. The shielding cover can effectively reduce the induced current generated when the reinforcement cage moves in an electromagnetic field, reduce the risk of electric shock, ensure the operation safety of constructors in the electromagnetic field environment, and prevent metal corrosion and structural damage caused by the induced current.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic shielding for wall-breaking construction, and specifically, to a detachable steel reinforcement cage shielding cover. Background Art

[0002] When constructing a bridge, multiple large concrete bridge piers need to be formed. During the construction of the bridge piers, the pile foundations of the bridge piers will be constructed first. When constructing the pile foundation, the pre-bundled steel reinforcement cage will be placed into the pre-set pile pit using a crane.

[0003] There are a large number of electrical equipment and transmission lines at the construction site, including high-voltage power towers and overhead wires, indicating that there is a strong electromagnetic field around the construction site. At such a construction site, since the steel reinforcement cage is made of metal materials, when they move in a strong electromagnetic field environment, induced current will be generated. The induced current will not only pose a threat to the safety of construction workers, but may also affect the structural stability of the steel reinforcement cage itself, resulting in problems such as local overheating and accelerated corrosion.

[0004] Currently, at the construction site, the protective measures for the electromagnetic field are often relatively simple, such as setting a safety distance and wearing protective equipment. However, these measures cannot effectively weaken the induced current generated on the steel reinforcement cage. Traditional shielding methods may be costly and difficult to implement at a complex construction site, and cannot provide comprehensive protection. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a detachable steel reinforcement cage shielding cover to reduce the induced current generated when the steel reinforcement cage moves in the electromagnetic field, effectively prevent construction interruption and the resulting additional maintenance work, improve construction efficiency, and reduce construction costs.

[0006] The present invention provides a detachable steel reinforcement cage shielding cover, including a detachable shielding structure, a flexible shielding structure, and a detachable grounding structure, wherein:

[0007] The detachable shielding structure includes a columnar shielding shell and a dome-shaped plate. The columnar shielding shell includes a plurality of arc-shaped plates detachably provided on the outer periphery of the steel reinforcement cage, and an elastic insulating cushion is provided on the inner surface of the arc-shaped plate; the dome-shaped plate includes a dome bottom plate and a dome cover. An upper connecting collar is provided on the upper side of the dome bottom plate, and a lower connecting ring is provided on its lower side. A plurality of lifting rings are provided on the outer side wall of the upper connecting collar. The dome-shaped plate is detachably assembled on the top of the columnar shielding shell through the lower connecting ring, and the dome cover is detachably sleeved on the upper connecting collar;

[0008] The flexible shielding structure includes a central rotating component and a lifting component. The central rotating component includes a rotating motor disposed at the center on the upper side of the dome bottom plate. The power output end of the rotating motor is detachably equipped with a gear shaft. A gear is provided on the gear shaft. A rotating shaft sleeve is sleeved on the upper part of the gear, and a tooth groove matched with the gear is provided on the inner side of the rotating shaft sleeve. The upper end of the flexible shielding layer is connected to the rotating shaft sleeve, and the flexible shielding layer can be wound around the rotating shaft sleeve and can be lowered along the axis of the steel reinforcement cage to cover the assembled detachable shielding structure. A cover plate is provided on the upper side of the rotating shaft sleeve, and several round holes are provided on the cover plate. The lifting component includes a lifting motor disposed on the upper side of the gear. The power output end of the lifting motor is connected to a lead screw. A telescopic rod is threadedly fitted on the lead screw, and a guide block is provided on the outer side wall of the telescopic rod. A guide sleeve is fixedly provided on the upper side of the round hole, and a guide groove is provided on the inner side wall of the guide sleeve. The guide block is movably fitted in the guide groove. The top of the telescopic rod is detachably connected to the dome cover;

[0009] The detachable grounding structure includes a grounding pile and a grounding wire. One end of the grounding wire is connected to the grounding pile, and the other end is connected to the reserved wire on the columnar shielding shell through an aviation plug.

[0010] Preferably, an external thread is provided on the upper end of the columnar shielding shell, and an internal thread is provided on the inner side of the lower connecting ring. The lower connecting ring is threadedly fitted with the upper end of the columnar shielding shell.

[0011] Preferably, a motor housing is provided on the dome bottom plate. A first rechargeable battery is provided in the motor housing. The rotating motor is electrically connected to the first rechargeable battery. A first bearing is provided on the motor housing, and the gear shaft is fitted in the first bearing.

[0012] Preferably, the edges of every two adjacent arc-shaped plates are nested and connected through a chute and a slider to form a columnar shielding shell.

[0013] Preferably, the flexible shielding layer is a cylindrical shape with an opening on one side. A traction rope is connected to its lower end. A guide rod is provided on the rotating shaft sleeve, and the guide rod is disposed in the opening on the side of the protective cover.

[0014] Preferably, a groove for winding and storing the flexible shielding layer is provided on the outer wall of the rotating shaft sleeve.

[0015] Preferably, a positioning sleeve is provided on the lower side of the dome cover, and the upper end of the telescopic rod is movably disposed in the positioning sleeve.

[0016] Preferably, the lead screw includes a driving rotary lead screw and at least one driven rotary lead screw. The lower end of the driving rotary lead screw is connected to the power output end of the lifting motor, and at least one driving wheel is provided at the lower part thereof. The lower end of the driven rotary lead screw is connected to the second bearing on the upper side of the gear, and a driven wheel is provided at the lower part thereof. The driving wheel and the driven wheel are connected by belt drive. A plurality of guiding rotating shafts are provided between the driving rotary lead screw and the driven rotary lead screw. The guiding rotating shafts are arranged on the upper side of the gear through the third bearing, and the belt contacts one side of the guiding rotating shaft.

[0017] Preferably, a second storage battery is provided at the top of the gear shaft, and the lifting motor is electrically connected to the second storage battery.

[0018] Preferably, the arc-shaped plate is made of a light high-permeability magnetic material. The flexible shielding layer is a high-permeability magnetic material, which is composed of a composite of a metal foil and an insulating fiber. The grounding wire adopts a flexible copper wire that can be wound and stored.

[0019] The working principle of the present invention: The detachable steel reinforcement cage shielding cover of the present invention is provided with a detachable shielding structure, including a plurality of arc-shaped plates detachably arranged on the outer periphery of the steel reinforcement cage, and a columnar shielding shell is formed by the arc-shaped plates, which is convenient for transportation and rapid on-site assembly. It can be spliced around the steel reinforcement cage into a complete columnar shielding cover, reducing the influence of the external magnetic field on the steel reinforcement cage, and at the same time playing the role of insulation and protecting the surface of the steel reinforcement cage; it also includes a dome-shaped plate for protecting the flexible shielding layer that automatically unfolds and contracts at the top. Secondly, a flexible shielding structure is provided, including a central rotating component, that is, a rotating motor is arranged at the center of the inner plane of the dome-shaped part of the shielding cover, the rotating motor is connected to the gear by transmission, the gear is connected to the rotating shaft sleeve, and a flexible shielding layer is arranged on the rotating shaft sleeve, which can be lowered along the axis of the steel reinforcement cage to cover the assembled columnar shielding shell. In order to facilitate hoisting, a round hole for the lifting ring to expose can be opened in the upper part of the flexible shielding layer; it also includes a lifting component, that is, a telescopic rod is arranged on the upper side of the gear, and the telescopic rod is extended upward by the lifting motor to lift the dome cover, separate the dome cover and the dome bottom plate, and then drive the flexible shielding layer to be lowered outward along the axis of the steel reinforcement cage through the separated space by driving the rotating motor forward to achieve the coverage of the flexible shielding layer. Reverse driving can retract the flexible shielding layer. The lower end of the flexible shielding layer is connected to a traction rope, and a guiding rod is arranged on the rotating shaft sleeve to facilitate the winding and unfolding of the flexible shielding layer. In addition, a detachable grounding structure is provided, adopting a flexible copper wire that can be wound and stored, with both ends respectively connected to the shielding cover and the grounding pile, and connected through an aviation plug in the middle to provide good grounding for the shielding cover.

[0020] Advantages of the present invention: The detachable steel cage shielding cover of the present invention can effectively reduce the induced current generated when the steel cage moves in the electromagnetic field. Weakening the induced current in the steel cage can reduce the risk of electric shock and ensure the safety of construction workers in the electromagnetic field environment. In addition, reducing the induced current in the steel cage helps prevent metal corrosion and structural damage caused by the induced current, thereby improving the durability and reliability of the entire engineering structure, extending the service life of the steel cage, effectively preventing construction interruptions and additional maintenance work, improving construction efficiency, and reducing construction costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a closed state diagram of the detachable steel cage shielding cover of the present invention;

[0022] Figure 2 is an unfolded state diagram of the detachable steel cage shielding cover of the present invention;

[0023] Figure 3 is Figure 1 a schematic structural diagram of the circular top cover in

[0024] Figure 4 is Figure 1 a top view of the circular dome-shaped plate in

[0025] Figure 5 is Figure 4 a sectional view along A-A in

[0026] Figure 6 is Figure 5 a partially enlarged view of the flexible shielding structure in

[0027] Figure 7 is Figure 4 a partially enlarged view of the lifting assembly in

[0028] In the figure:

[0029] Detachable shielding structure 1, columnar shielding shell 11; circular dome-shaped plate 12, circular dome bottom plate 12-1, circular top cover 12-2, upper connecting collar 12-3, lower connecting ring 12-4, lifting ring 12-5, positioning sleeve 12-6;

[0030] Flexible shielding structure 2, central rotating assembly 21, rotating motor 21-1, gear shaft 21-2, gear 21-3, rotating shaft sleeve 21-4, flexible shielding layer 21-5, cover plate 21-6, round hole 21-7, motor housing 21-8, first rechargeable battery 21-9, first bearing 21-10; lifting assembly 22, lifting motor 22-1, lead screw 22-2, active rotating lead screw 22-2-1, driven rotating lead screw 22-2-2, driving wheel 22-2-3, second bearing 22-2-4, driven wheel 22-2-5, belt 22-2-6, guiding rotating shaft 22-2-7, third bearing 22-2-8, telescopic rod 22-3, guiding block 22-4, guiding sleeve 22-5, guiding groove 22-6, guiding rod 22-7, groove 22-8, second rechargeable battery 22-9;

[0031] Detachable grounding structure 3, grounding pile 31, grounding wire 32, aviation plug 33, reserved wire 34. Specific implementation manner

[0032] In order to make the technical solution of the present invention easier to understand, the technical solution of the present invention will be clearly and completely described by way of specific embodiments in conjunction with the accompanying drawings.

[0033] Embodiment 1:

[0034] As Figures 1 to 7 shown, the detachable steel cage shielding cover of this embodiment includes a detachable shielding structure 1, a flexible shielding structure 2 and a detachable grounding structure 3, wherein:

[0035] The detachable shielding structure 1 includes a columnar shielding shell 11 and a dome-shaped plate 12. The columnar shielding shell 11 includes a plurality of arc-shaped plates detachably arranged on the outer periphery of the steel cage, and an elastic insulating buffer pad is arranged on the inner surface of the arc-shaped plate; the dome-shaped plate 12 includes a dome bottom plate 12-1 and a dome cover 12-2. An upper connecting collar 12-3 is arranged on the upper side of the dome bottom plate 12-1, and a lower connecting ring 12-4 is arranged on its lower side. A plurality of lifting rings 12-5 are arranged on the outer side wall of the upper connecting collar 12-3. The dome-shaped plate 12 is detachably assembled on the top of the columnar shielding shell 11 through the lower connecting ring 12-4, and the dome cover 12-2 is detachably sleeved on the upper connecting collar 12-3;

[0036] The flexible shielding structure 2 includes a central rotating assembly 21 and a lifting assembly 22. The central rotating assembly 21 includes a rotating motor 21-1 disposed at the center of the upper side of the dome bottom plate 12-1. The power output end of the rotating motor 21-1 is detachably fitted with a gear shaft 21-2. A gear 21-3 is provided on the gear shaft 21-2. An upper portion of the gear 21-3 is sleeved with a rotating shaft sleeve 21-4, and a tooth groove fitted with the gear 21-3 is provided inside the rotating shaft sleeve 21-4. The upper end of the flexible shielding layer 21-5 is connected to the rotating shaft sleeve 21-4, and the flexible shielding layer 21-5 can be wound around the rotating shaft sleeve 21-4 and can be lowered along the axis of the steel reinforcement cage to cover the assembled detachable shielding structure 1. A cover plate 21-6 is provided on the upper side of the rotating shaft sleeve 21-4, and several circular holes 21-7 are provided on the cover plate 21-6. The lifting assembly 22 includes a lifting motor 22-1 disposed above the gear 21-3. The power output end of the lifting motor 22-1 is connected to a lead screw 22-2. An expansion rod 22-3 is threadedly fitted on the lead screw 22-2, and a guide block 22-4 is provided on the outer side wall of the expansion rod 22-3. A guide sleeve 22-5 is fixedly provided above the circular hole 21-7, and a guide groove 22-6 is provided on the inner side wall of the guide sleeve 22-5. The guide block 22-4 is movably fitted in the guide groove 22-6, and the top of the expansion rod 22-3 is detachably connected to the dome cover 12-2.

[0037] The detachable grounding structure 3 includes a grounding pile 31 and a grounding wire 32. One end of the grounding wire 32 is connected to the grounding pile 31, and the other end thereof is connected to a reserved wire 34 on the columnar shielding shell 11 through an aviation plug 33.

[0038] Embodiment 2:

[0039] As Figures 1 to 7 shown, the detachable steel reinforcement cage shielding cover of this embodiment includes a detachable shielding structure 1, a flexible shielding structure 2, and a detachable grounding structure 3, wherein:

[0040] The detachable shielding structure 1 includes a columnar shielding shell 11 and a dome-shaped plate 12. The columnar shielding shell 11 includes a plurality of arc-shaped plates detachably disposed on the outer periphery of the steel reinforcement cage, and an elastic insulating buffer pad is provided on the inner surface of the arc-shaped plate. The dome-shaped plate 12 includes a dome bottom plate 12-1 and a dome cover 12-2. An upper connecting collar 12-3 is provided on the upper side of the dome bottom plate 12-1, and a lower connecting ring 12-4 is provided on the lower side thereof. A plurality of hanging rings 12-5 are provided on the outer side wall of the upper connecting collar 12-3. The dome-shaped plate 12 is detachably fitted on the top of the columnar shielding shell 11 through the lower connecting ring 12-4, and the dome cover 12-2 is detachably sleeved on the upper connecting collar 12-3.

[0041] The flexible shielding structure 2 includes a central rotating assembly 21 and a lifting assembly 22. The central rotating assembly 21 includes a rotating motor 21-1 disposed at the center of the upper side of the dome bottom plate 12-1. The power output end of the rotating motor 21-1 is detachably fitted with a gear shaft 21-2. A gear 21-3 is provided on the gear shaft 21-2. A rotating sleeve 21-4 is sleeved on the upper part of the gear 21-3, and a tooth groove fitted with the gear 21-3 is provided on the inner side of the rotating sleeve 21-4. The upper end of the flexible shielding layer 21-5 is connected to the rotating sleeve 21-4, and the flexible shielding layer 21-5 can be wound around the rotating sleeve 21-4 and can be lowered along the axis of the steel reinforcement cage to cover the assembled detachable shielding structure 1. A cover plate 21-6 is provided on the upper side of the rotating sleeve 21-4, and several round holes 21-7 are provided on the cover plate 21-6. The lifting assembly 22 includes a lifting motor 22-1 disposed on the upper side of the gear 21-3. The power output end of the lifting motor 22-1 is connected to a lead screw 22-2. A telescopic rod 22-3 is threadedly fitted on the lead screw 22-2, and a guide block 22-4 is provided on the outer side wall of the telescopic rod 22-3. A guide sleeve 22-5 is fixedly provided on the upper side of the round hole 21-7, and a guide groove 22-6 is provided on the inner side wall of the guide sleeve 22-5. The guide block 22-4 is movably fitted in the guide groove 22-6. The top of the telescopic rod 22-3 is detachably connected to the dome cover 12-2.

[0042] The detachable grounding structure 3 includes a grounding pile 31 and a grounding wire 32. One end of the grounding wire 32 is connected to the grounding pile 31, and the other end is connected to a reserved wire 34 on the columnar shielding shell 11 through an aviation plug 33.

[0043] External threads are provided at the upper end of the columnar shielding shell 11, and internal threads are provided on the inner side of the lower connecting ring 12-4. The lower connecting ring 12-4 is threadedly fitted with the upper end of the columnar shielding shell 11.

[0044] A motor housing 21-8 is provided on the dome bottom plate 12-1. A first rechargeable battery 21-9 is provided in the motor housing 21-8. The rotating motor 21-1 is electrically connected to the first rechargeable battery 21-9. A first bearing 21-10 is provided on the motor housing 21-8, and the gear shaft 21-2 is fitted in the first bearing 21-10.

[0045] The edges of every two adjacent arc-shaped plates are nested and joined through a chute and a slider to form the columnar shielding shell 11.

[0046] The flexible shielding layer 21-5 is a cylindrical shape with an opening on one side, and its lower end is connected to a towing rope. A guide rod 22-7 is provided on the rotating sleeve 21-4, and the guide rod 22-7 is disposed in the opening on the side of the protective cover 22-5.

[0047] A groove 22-8 for winding and storing the flexible shielding layer 21-5 is provided on the outer wall of the rotating sleeve 21-4.

[0048] A positioning sleeve 12-6 is provided on the lower side of the round top cover 12-2, and the upper end of the telescopic rod 22-3 is movably arranged in the positioning sleeve 12-6.

[0049] The lead screw 22-2 includes a driving rotating lead screw 22-2-1 and at least one driven rotating lead screw 22-2-2. The lower end of the driving rotating lead screw 22-2-1 is connected to the power output end of the lifting motor 22-1, and at least one driving wheel 22-2-3 is provided at the lower part thereof. The lower end of the driven rotating lead screw 22-2-2 is connected to the second bearing 22-2-4 on the upper side of the gear 21-3, and a driven wheel 22-2-5 is provided at the lower part thereof. The driving wheel 22-2-3 and the driven wheel 22-2-5 are connected by a belt 22-2-6 in a transmission manner. A plurality of guiding rotating shafts 22-2-7 are provided between the driving rotating lead screw 22-2-1 and the driven rotating lead screw 22-2-2. The guiding rotating shafts 22-2-7 are arranged on the upper side of the gear 21-3 through the third bearing 22-2-8, and the belt 22-2-6 contacts one side of the guiding rotating shafts 22-2-7.

[0050] A second storage battery 22-9 is provided at the top of the gear shaft 21-2, and the lifting motor 22-1 is electrically connected to the second storage battery 22-9.

[0051] The arc-shaped plate is made of a light high-permeability magnetic material. The flexible shielding layer 21-5 is a high-permeability magnetic material, which is composed of a metal foil and an insulating fiber. The grounding wire 32 adopts a soft copper wire that can be wound and stored.

[0052] The usage method of the present invention:

[0053] 1. Device installation

[0054] (1) Assembly of the detachable shielding structure: First, place the steel reinforcement cage on the horizontal ground near the predetermined lowering position, and then assemble several arc-shaped plates around the steel reinforcement cage one by one. During assembly, align the sliders and chutes of adjacent arc-shaped plates to ensure tight connection. Pay attention to making the elastic insulating buffer pads on the inner surface fully contact the steel reinforcement cage.

[0055] (2) Installation of the flexible shielding structure: Align the upper dome-shaped plate with the flexible shielding layer with the circular opening on the upper part of the outer periphery of the columnar shielding shell, and rotate it to make a tight connection.

[0056] (3) Connection of the detachable grounding structure: Insert the grounding pile into the pre-selected grounding position, unfold the grounding wire connected to the grounding pile, and extend it to an appropriate length. Then connect the male aviation plug at one end of the grounding wire to the female head of the reserved wire on the columnar shielding shell to ensure a firm connection.

[0057] 2. Device operation

[0058] (1) Shielding layer deployment: Use the remote control to control the lifting motor to lift the dome cover, and then start the rotating motor to rotate forward. At this time, the rotating sleeve begins to rotate, and the flexible shielding layer is lowered along the axis of the steel cage. The flexible shielding layer is stretched open by the columnar shielding shell to cover its surface. During the lowering process, observe the deployment of the flexible shielding layer. The flexible shielding layer can be adjusted by pulling the traction rope to ensure that it is not stuck or abnormal;

[0059] (2) Lowering the steel cage: After the shielding layer is deployed, start lowering the steel cage for setting up the shielding cover. During the lowering process, pay close attention to the status of each component of the shielding cover to ensure that each arc plate is firmly connected and the grounding structure is not loose. If any abnormality is found, stop the lowering operation immediately, check and eliminate the fault;

[0060] (3) Shielding layer retraction: When the steel cage is lowered to the designated position, the rotating motor is reversed by the remote control, and the rotating sleeve rotates in the opposite direction. The flexible shielding layer slides upward under the combing action of the guide rod and gradually retracts into the groove on the side of the rotating sleeve. After the flexible shielding layer is completely retracted, the power supply of the rotating motor is turned off;

[0061] (4) Closing the dome-shaped plate: When the flexible shielding layer is completely retracted, operate the remote control to retract the telescopic rod, so that the dome cover descends and closes the gap formed by the separation of the dome cover and the dome bottom plate. After it is completely closed, turn off the power of the lifting motor.

[0062] 3. Device disassembly

[0063] (1) First, disassemble the portable grounding assembly, disconnect the aviation plug between the grounding stake and the columnar shielding cover, pull the grounding stake out of the ground, and clean it;

[0064] (2) Remove the dome-shaped plate with the flexible shielding layer from the top of the cylindrical shielding shell by rotating it, sort it out and store it properly;

[0065] (3) Disassemble the detachable shielding structure, untie the connection structure of adjacent arc plates in turn, disassemble the arc plates, check and clean them, and then store them for next use.

[0066] It should be noted that the embodiments described herein are only partial embodiments of the present invention, rather than all implementations of the present invention, and the embodiments are only exemplary, and their role is only to provide a more intuitive and clear way to understand the content of the present invention, rather than to limit the technical solutions described in the present invention. Without departing from the concept of the present invention, all other implementation methods that can be thought of by ordinary technicians in this field without creative work, and other simple replacements and various changes to the technical solutions of the present invention, all belong to the protection scope of the present invention.

Claims

1. A detachable steel reinforcement cage shielding cover, characterized in that It includes a detachable shielding structure (1), a flexible shielding structure (2), and a detachable grounding structure (3), where: The detachable shielding structure (1) includes a columnar shielding shell (11) and a dome-shaped plate (12). The columnar shielding shell (11) includes several arc-shaped plates detachably arranged on the outer periphery of the steel reinforcement cage, and an elastic insulating cushion is provided on the inner surface of the arc-shaped plate; the dome-shaped plate (12) includes a dome bottom plate (12-1) and a dome top cover (12-2). An upper connecting collar (12-3) is provided on the upper side of the dome bottom plate (12-1), and a lower connecting ring (12-4) is provided on its lower side. Several hanging rings (12-5) are provided on the outer side wall of the upper connecting collar (12-3). The dome-shaped plate (12) is detachably assembled on the top of the columnar shielding shell (11) through the lower connecting ring (12-4), and the dome top cover (12-2) is detachably sleeved on the upper connecting collar (12-3); The flexible shielding structure (2) includes a central rotation assembly (21) and a lifting assembly (22). The central rotation assembly (21) includes a rotation motor (21-1) provided at the center of the upper side of the dome bottom plate (12-1). The power output end of the rotation motor (21-1) is detachably assembled with a gear shaft (21-2). A gear (21-3) is provided on the gear shaft (21-2). A rotation shaft sleeve (21-4) is sleeved on the upper part of the gear (21-3), and a tooth groove matched with the gear (21-3) is provided on the inner side of the rotation shaft sleeve (21-4). The upper end of the flexible shielding layer (21-5) is connected to the rotation shaft sleeve (21-4), and the flexible shielding layer (21-5) can be wound around the rotation shaft sleeve (21-4) and can be lowered along the axis of the steel reinforcement cage to cover the assembled detachable shielding structure (1). A cover plate (21-6) is provided on the upper side of the rotation shaft sleeve (21-4), and several round holes (21-7) are provided on the cover plate (21-6); The lifting assembly (22) includes a lifting motor (22-1) provided on the upper side of the gear (21-3). The power output end of the lifting motor (22-1) is connected to a lead screw (22-2). An expansion rod (22-3) is threadedly assembled on the lead screw (22-2), and a guide block (22-4) is provided on the outer side wall of the expansion rod (22-3). A guide sleeve (22-5) is fixedly provided on the upper side of the round hole (21-7), and a guide groove (22-6) is provided on the inner side wall of the guide sleeve (22-5). The guide block (22-4) is movably assembled in the guide groove (22-6), and the top of the expansion rod (22-3) is detachably connected to the dome top cover (12-2); The detachable grounding structure (3) includes a grounding pile (31) and a grounding wire (32). One end of the grounding wire (32) is connected to the grounding pile (31), and the other end is connected to a reserved wire (34) on the columnar shielding shell (11) through an aviation plug (33).

2. The detachable steel bar cage shielding cover according to claim 1, wherein External threads are provided at the upper end of the columnar shielding shell (11), and internal threads are provided on the inner side of the lower connecting ring (12-4). The lower connecting ring (12-4) is threadedly assembled with the upper end of the columnar shielding shell (11).

3. The detachable steel cage shielding cover according to claim 1, wherein, The dome bottom plate (12-1) is provided with a motor housing (21-8), a first storage battery (21-9) is provided in the motor housing (21-8), the rotating motor (21-1) is electrically connected to the first storage battery (21-9), a first bearing (21-10) is provided on the motor housing (21-8), and the gear shaft (21-2) is mounted in the first bearing (21-10).

4. The detachable steel reinforcement cage shielding cover according to claim 1, characterized in that, The edges of each two adjacent arc-shaped plates are connected by nesting of sliding grooves and sliding blocks to form a columnar shielding shell (11).

5. The detachable steel reinforcement cage shielding cover according to claim 1, wherein The flexible shielding layer (21-5) is cylindrical with an opening on one side, and its lower end is connected to a traction rope. The rotating sleeve (21-4) is provided with a guide rod (22-7), and the guide rod (22-7) is arranged in the opening on the side of the protective cover (22-5).

6. The detachable steel bar cage shielding cover according to claim 1, characterized in that, The outer wall of the rotating sleeve (21-4) is provided with a groove (22-8) for winding and storing the flexible shielding layer (21-5).

7. The detachable steel reinforcement cage shielding cover according to claim 1, characterized in that A positioning sleeve (12-6) is provided on the lower side of the dome cover (12-2), and the upper end of the telescopic rod (22-3) is movably arranged in the positioning sleeve (12-6).

8. The detachable steel cage shielding cover according to claim 1, wherein, The screw rod (22-2) comprises an active rotating screw rod (22-2-1) and at least one driven rotating screw rod (22-2-2); the lower end of the active rotating screw rod (22-2-1) is connected to the power output end of the lifting motor (22-1) and at least one driving wheel (22-2-3) is provided at its lower part; the lower end of the driven rotating screw rod (22-2-2) is connected to the second bearing (22-2-4) on the upper side of the gear (21-3) and at least one driven wheel (22-2-3) is provided at its lower part -5), the driving wheel (22-2-3) and the driven wheel (22-2-5) are connected by a belt (22-2-6), a plurality of guide shafts (22-2-7) are arranged between the driving rotating screw (22-2-1) and the driven rotating screw (22-2-2), the guide shafts (22-2-7) are arranged on the upper side of the gear (21-3) through a third bearing (22-2-8), and one side of the belt (22-2-6) contacts with the guide shaft (22-2-7).

9. The detachable steel cage shielding cover according to claim 1, characterized in that, A second storage battery (22-9) is provided on the top of the gear shaft (21-2), and the lifting motor (22-1) is electrically connected to the second storage battery (22-9).

10. The detachable steel reinforcement cage shielding cover according to claim 1, wherein, The arc plate is made of a light material with high magnetic permeability, the flexible shielding layer (21-5) is a high magnetic permeability material, which is a composite of metal foil and insulating fiber, and the grounding wire (32) is a soft copper wire that can be wound and stored.

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