Faraday cage reserved joint construction device and process for constructional engineering

Abstract

The invention belongs to the technical field of constructional engineering, and discloses a Faraday cage reserved joint construction device and process for constructional engineering, and the Faraday cage reserved joint construction device for constructional engineering comprises a Faraday cage net and a shielding plate arranged at a reserved joint of the Faraday cage net, a plurality of groove holes matched with the reserved connectors are formed in one side of the shielding plate, a rectangular groove is formed in the side, close to the wall surface, of the shielding plate, a sealing assembly is arranged in the groove, and the sealing assembly comprises a sealing piece, a leakage-proof piece and an extrusion piece which are sequentially arranged in the groove. By arranging the sealing assembly and the hydraulic mechanism, a self-adaptive flexible sealing defensive line can be formed, the problem of grout leakage caused by rigid contact of a cover plate and a formwork in traditional construction is effectively solved, and a convex pad in the sealing assembly is flexibly deformed under the action of stable pressure provided by the hydraulic mechanism; and the coating can be tightly attached to the tiny uneven part of the wall surface.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of building engineering, and particularly relates to a Faraday cage reserved joint construction device and process for building engineering. BACKGROUND

[0002] In building engineering, in order to form a continuous and closed Faraday cage electromagnetic shielding body, the steel bars in the foundation, wall, column and floor need to be electrically connected. Since the concrete structure is constructed in stages by using the floor and wall, if the steel bars in the first-poured component and the second-poured component are not effectively electrically connected at the joint, electromagnetic waves will leak from the electrical gap. Therefore, a reserved joint of the steel bar is left in the first-poured component to facilitate reliable connection with the steel bar of the subsequent component, so as to ensure the electrical continuity of the Faraday cage in the building structure and form a complete and closed electromagnetic shielding body.

[0003] In the prior art, the traditional reserved joint construction method is to directly drill a hole in the formwork, so that the steel bar joint is exposed outside the hole. Although this method is simple in operation process, does not need to customize components, and has low construction cost, the reserved joint of the steel bar is difficult to be accurately positioned when exposed outside the hole of the formwork, and the steel bar is prone to displacement during the concrete pouring and vibrating process due to external impact, which affects the subsequent connection accuracy. To improve the above problems, the present application discloses a Faraday cage reserved joint cover plate device and its construction method. The technical solution is to set a detachable joint cover plate, one side of the joint cover plate is in contact with the concrete surface, a plurality of wooden nail holes are formed through the side edge of the joint cover plate, a clamping hole matched with the Faraday cage steel bar is formed through the joint cover plate, and the side of the joint cover plate in contact with the concrete is serrated. Although the above technical solution can separate the reserved joint from the concrete by the cover plate, the reserved joint can be directly exposed after the formwork is removed, which is convenient for subsequent wall steel bar connection, and to a certain extent, solves the positioning and displacement problems of the traditional method. However, in actual use, the contact surface between the cover plate and the formwork is hard contact. In the face of strong fluidity of the concrete slurry or slight unevenness of the formwork, the concrete slurry is easy to leak from the gap of the contact surface, thereby polluting the reserved joint of the steel bar. Workers need to use hammers, chisels, angle grinders and other tools to clean up the polluted joint, which not only leads to low construction efficiency, but also may damage the steel bar body during the cleaning process, affecting the electrical connection performance and structural safety. SUMMARY

[0004] The present application aims to provide a Faraday cage reserved joint construction device and process for building engineering, to solve the problem that the traditional construction method is not convenient for positioning the joint of the steel bar, and the concrete slurry is easy to leak from the gap when the joint cover plate method is used, polluting the reserved joint.

[0005] The technical scheme adopted by the present application is: a Faraday cage reserved joint construction device for building engineering, comprising a Faraday cage net and a shielding plate arranged at the reserved joint of the Faraday cage net, a plurality of slot holes matched with the reserved joint are formed on one side of the shielding plate, a rectangular groove is formed on the side of the shielding plate close to the wall, a sealing assembly is arranged in the groove, the sealing assembly comprises a sealing piece, a leakage prevention piece and an extrusion piece arranged in the groove in sequence, the sealing piece comprises a convex pad, the convex pad is arranged on the side of the rectangular groove close to the wall, the leakage prevention piece comprises an abutting frame and a U-shaped elastic section symmetrically arranged on the side edge of the abutting frame, the side of the U-shaped elastic section away from the abutting frame is fixed in the groove, and the extrusion piece comprises an extrusion frame and a corrugated elastic section symmetrically arranged on the side edge of the extrusion frame, the side of the corrugated elastic section away from the extrusion frame is fixedly connected in the groove. The other side of the shielding plate is provided with a hydraulic mechanism, the hydraulic mechanism comprises an oil cavity formed in the shielding plate, a liquid inlet pipe communicated with the oil cavity, and a plurality of oil channels arranged around the oil cavity and leading to the groove, and the oil cavity is filled with hydraulic oil.

[0006] Further, the hydraulic mechanism comprises a push plate slidingly arranged in the oil cavity, a plurality of connecting ropes fixed on the push plate, and a box fixed on the shielding plate, a main shaft for winding the connecting ropes is rotationally connected in the box, and a control mechanism is arranged on the main shaft.

[0007] Further, a slide rod is fixed in the oil cavity, a hole hole is formed in the push plate and slidably matched with the slide rod, and a spring one is arranged on the slide rod, and the two ends of the spring one are fixed to the push plate and the oil cavity respectively.

[0008] Further, the control mechanism comprises a ratchet fixed on the main shaft and a pawl matched with the ratchet, the pawl is rotationally connected in the box through a rotating shaft, a torsional spring is arranged on the rotating shaft, and the two ends of the torsional spring are fixed to the pawl and the box respectively.

[0009] Further, the two sides of the shielding plate are symmetrically provided with a jacking mechanism, the jacking mechanism comprises a slot formed in the shielding plate, a tapping plate slidingly arranged in the slot, a rope fixed on the tapping plate, and a spring two arranged between the tapping plate and the slot, the other end of the rope penetrates into the box and is wound on the main shaft, and the winding direction of the rope is opposite to that of the connecting rope.

[0010] Further, the abutting frame is located between the convex pad and the corrugated elastic section.

[0011] Further, a notch is formed in the convex pad and communicated with the slot hole.

[0012] Further, rubber rings in sealing contact with the outer surface of the slide rod are arranged on both sides of the hole.

[0013] Further, one end of the rotating shaft extends to the outside of the box body and is fixed with an operation handle, and one end of the main shaft extends to the outside of the box body and is fixed with a knob.

[0014] A Faraday cage reserved joint construction process for construction engineering, according to the Faraday cage reserved joint construction device for construction engineering, comprising the following steps: Step one, cut the Faraday cage net according to the structure size, after the completion of the formwork construction, install the cut Faraday cage net on the formwork at the bottom of the plate; Step two, at the joint position of the Faraday cage net corresponding to the bottom of the plate and the wall surface, fold the Faraday cage net towards the wall surface to form a reserved joint; Step three, install a shielding plate at the reserved joint position of the Faraday cage net, so that the reserved joint penetrates into the slot hole of the shielding plate, and the shielding plate is fixed on the formwork of the wall surface by using wooden nails; Step four, operate the hydraulic mechanism to drive the sealing assembly, so that the convex pad is pressed against the wall surface to form a seal, and the concrete pouring operation is carried out under the protection of the sealing assembly; Step five, after the concrete solidifies, remove the shielding plate to expose the uncontaminated reserved joint, and weld the subsequent another Faraday cage net with the clean reserved joint to form a complete Faraday cage.

[0015] The beneficial effects of the present application are: 1. By setting the sealing assembly and the hydraulic mechanism, a self-adaptive flexible sealing line can be formed, effectively solving the problem of slurry leakage caused by the hard contact of the cover plate and the formwork in traditional construction. The convex pad in the sealing assembly deforms flexibly under the stable pressure provided by the hydraulic mechanism, can tightly fit the small unevenness of the wall surface, and its gap can fit the surface of the reserved joint, filling the gap between the joint and the slot hole. Through the cooperation of the sealing piece, the leakage prevention piece and the extrusion piece, the strong flowability of the concrete slurry is effectively prevented from penetrating into the reserved joint, thereby avoiding the cumbersome process of subsequent chiseling, polishing and cleaning the joint in the traditional method, preventing damage to the steel body during the cleaning process, and further improving the reliability of the electrical connection of the Faraday cage net.

[0016] 2. By setting the control mechanism and the pushing mechanism, the ratchet and the pawl cooperate to stably lock the position of the main shaft, prevent the loss of hydraulic pressure caused by vibration during concrete pouring and vibration, and ensure the continuous sealing effect of the sealing assembly. When the push plate is reset, the reaction force generated by spring two driving the tapping plate can assist the shielding plate in separating from the formwork, replacing the traditional pry bar prying method. Only the slight adhesion between the shielding plate and the formwork needs to be broken to achieve separation, without damaging the shielding plate, facilitating the repeated use of the shielding plate. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application.

[0018] Figure 2 Schematic diagram of the three-dimensional structure of the Faraday cage net and shielding plate of the present application.

[0019] Figure 3 Schematic diagram of the three-dimensional structure of the shielding plate, slot hole and sealing assembly of the present application.

[0020] Figure 4 Schematic diagram of the three-dimensional structure of the shielding plate and sealing assembly of the present application.

[0021] Figure 5 Schematic diagram of the local three-dimensional structure of the sealing member, leak-proof member and extrusion member of the present application.

[0022] Figure 6 Schematic diagram of the three-dimensional structure of the shielding plate of the present application.

[0023] Figure 7 Schematic diagram of the three-dimensional structure of the shielding plate of the present application. Figure 6 Schematic diagram of the enlarged structure of A in the present application.

[0024] Figure 8 Schematic diagram of the three-dimensional structure of the shielding plate, hydraulic mechanism and control mechanism of the present application.

[0025] Figure 9 Schematic diagram of the three-dimensional structure of the shielding plate and oil cavity of the present application.

[0026] Figure 10 Schematic diagram of the three-dimensional structure of the shielding plate and pushing mechanism of the present application.

[0027] Figure 11 Schematic diagram of the three-dimensional structure of the shielding plate of the present application. Figure 10 Schematic diagram of the enlarged structure of B in the present application.

[0028] Figure 12 Schematic diagram of the local three-dimensional structure of the pushing plate, connecting rope, main shaft, light hitting plate and rope of the present application.

[0029] Figure number explanation: 1, Faraday cage net; 2, shielding plate; 3, slot hole; 4, groove; 5, sealing assembly; 51, sealing member; 511, convex pad; 512, notch; 52, leak-proof member; 521, abutting frame; 522, U-shaped elastic section; 53, extrusion member; 531, extrusion frame; 532, corrugated elastic section; 6, hydraulic mechanism; 61, oil cavity; 62, liquid inlet pipe; 63, oil channel; 64, pushing plate; 641, hole; 642, rubber ring; 65, connecting rope; 66, box body; 67, main shaft; 68, sliding rod; 69, spring one; 7, control mechanism; 71, ratchet wheel; 72, pawl; 73, rotating shaft; 74, torsional spring; 75, operation handle; 76, knob; 8, pushing mechanism; 81, slotted; 82, light hitting plate; 83, rope; 84, spring two. DETAILED DESCRIPTION

[0030] In order to make the above objectives, characteristics and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings.

[0031] Embodiment one: refer to Figures 1-3 The present application provides a Faraday cage reserved joint construction device for building engineering, which comprises a Faraday cage net 1 and a shielding plate 2 arranged at the reserved joint of the Faraday cage net 1. The shielding plate 2 is fixed on the formwork of the wall surface by wooden nails. A plurality of slot holes 3 compatible with the reserved joint are formed on one side of the shielding plate 2. The specific composition and principle of the Faraday cage net 1 are well known in the art and will not be described in detail here.

[0032] Refer to Figures 3-7 A rectangular groove 4 is formed on the side of the shielding plate 2 close to the wall surface. A sealing assembly 5 is arranged in the groove 4. The sealing assembly 5 comprises a sealing element 51, a leakage prevention element 52 and an extrusion element 53 arranged in the groove 4 in sequence. The sealing element 51 comprises a convex pad 511 arranged on the side of the rectangular groove 4 close to the wall surface. The convex pad 511 can be made of elastic rubber material. When the convex pad 511 is subjected to pressure, it will deform flexibly and tightly fit the surface profile of the wall surface. Even if there is a slight depression or unevenness on the wall surface, the gap can also be filled by the deformation of the convex pad 511.

[0033] Specifically, the leakage prevention element 52 comprises an abutting frame 521 and U-shaped elastic sections 522 symmetrically arranged on the side edges of the abutting frame 521. The abutting frame 521 is attached to the side of the convex pad 511 away from the wall surface, for uniformly transmitting the pressure of the extrusion element 53 to the convex pad 511, avoiding the local uneven stress of the convex pad 511 leading to sealing failure. The side of the U-shaped elastic section 522 away from the abutting frame 521 is fixed in the groove 4. When the abutting frame 521 is extruded, the U-shaped elastic section 522 enables the abutting frame 521 to move, thereby enhancing the sealing effect of the convex pad 511 when it is pushed.

[0034] The extrusion element 53 comprises an extrusion frame 531 and corrugated elastic sections 532 symmetrically arranged on the side edges of the extrusion frame 531. The extrusion frame 531 is attached to the side of the abutting frame 521 away from the convex pad 511, for receiving external driving force and transmitting it to the abutting frame 521. The side of the corrugated elastic section 532 away from the extrusion frame 531 is fixedly connected in the groove 4. The corrugated elastic section 532 can stretch and contract under external force, driving the extrusion frame 531 to move.

[0035] The abutting frame 521 is located between the convex pad 511 and the corrugated elastic section 532, can form a seal with the inner wall of the groove 4, the convex pad 511 is provided with a notch 512 communicating with the slot hole 3, the convex pad 511 is of elastic material, the edge of the notch 512 can be flexibly deformed along with the whole convex pad 511 under pressure, tightly fit the surface profile of the reserved joint, and fill the small gap between the joint and the slot hole 3.

[0036] With reference to Figures 8-9 The other side of the shielding plate 2 is provided with a hydraulic mechanism 6 for driving the extrusion piece 53 and pressing the convex pad 511 against the wall surface.

[0037] Specifically, the hydraulic mechanism 6 comprises an oil cavity 61 provided in the shielding plate 2, a liquid inlet pipe 62 communicating with the oil cavity 61, and a plurality of oil channels 63 surrounding the oil cavity 61 and leading to the groove 4, the oil cavity 61 is filled with hydraulic oil, one end of the liquid inlet pipe 62 communicates with the oil cavity 61, and the other end extends out of the shielding plate 2 and is provided with a sealing cover, mainly used for supplementing or replacing the hydraulic oil in the oil cavity 61.

[0038] Specifically, the hydraulic mechanism 6 comprises a push plate 64 slidingly arranged in the oil cavity 61, a plurality of connecting ropes 65 fixed on the push plate 64, and a box body 66 fixed on the shielding plate 2, the box body 66 is rotatably connected with a main shaft 67 for winding the connecting ropes 65, both ends of the main shaft 67 are rotatably connected in the box body 66, wherein the push plate 64 is adapted to the inner wall of the oil cavity 61, the edge of the push plate 64 is in sealing contact with the inner wall of the oil cavity 61 and can slide along the oil cavity 61, and the connecting ropes 65 are made of high-strength and non-stretching material, mainly for transmitting the winding force of the main shaft 67 to pull the push plate 64 to slide in the oil cavity 61.

[0039] It should be noted that, with reference to Figure 8 and Figure 12 A slide rod 68 is fixed in the oil cavity 61, a hole 641 is provided in the push plate 64 for sliding cooperation with the slide rod 68, a spring 69 is arranged on the slide rod 68, both ends of the spring 69 are fixed on the push plate 64 and the oil cavity 61, the slide rod 68 provides sliding guide for the push plate 64 to avoid tilting of the push plate 64 due to uneven force during extrusion of hydraulic oil or resetting, wherein both sides of the hole 641 are provided with rubber rings 642 in sealing contact with the outer surface of the slide rod 68, when the push plate 64 slides along the slide rod 68 in the oil cavity 61, the rubber rings 642 can fit the outer surface of the slide rod 68, thereby filling the gap generated during sliding and forming a seal.

[0040] With reference to Figures 10-12The main shaft 67 is provided with a control mechanism 7. Specifically, the control mechanism 7 includes a ratchet 71 fixed to the main shaft 67 and a pawl 72 matched with the ratchet 71. The pawl 72 is rotationally connected to the box 66 through a rotating shaft 73. The rotating shaft 73 is provided with a torsion spring 74. The two ends of the torsion spring 74 are fixed to the pawl 72 and the box 66, respectively. One end of the rotating shaft 73 extends out of the box 66 and is fixed with an operation handle 75. When it is needed to unlock the main shaft 67, the operation handle 75 is pulled to drive the rotating shaft 73 to rotate synchronously, so that the pawl 72 rotates around the rotating shaft 73 and is separated from the tooth groove of the ratchet 71, thereby achieving quick unlocking. One end of the main shaft 67 extends out of the box 66 and is fixed with a knob 76. When it is needed to reset the push plate 64, a worker rotates the knob 76 to drive the main shaft 67 to rotate and wind the connecting rope 65. When the connecting rope 65 is wound, the push plate 64 is pulled to slide along the slide rod 68, so that the hydraulic oil flows back to the oil cavity 61, thereby preparing for the next sealing operation.

[0041] Further, referring to Figures 10-12 The two sides of the shielding plate 2 are symmetrically provided with a pushing mechanism 8. The pushing mechanism 8 includes a slot 81 opened in the shielding plate 2, a tapping plate 82 slidingly arranged in the slot 81, a rope 83 fixed to the tapping plate 82, and a spring 84 arranged between the tapping plate 82 and the slot 81. The other end of the rope 83 penetrates into the box 66 and is wound on the main shaft 67. The winding direction of the rope 83 is opposite to that of the connecting rope 65. When the main shaft 67 is quickly rotated to wind the connecting rope 65, the rope 83 can be released at this time. The force stored by the spring 84 is quickly released to push the tapping plate 82 to quickly slide along the slot 81 towards the wall body. Through the reaction force generated by the impact, the shielding plate 2 is assisted to be separated from the formwork. Compared with the traditional crowbar prying, only the slight adhesion between the shielding plate 2 and the formwork needs to be broken to achieve separation, so that the shielding plate 2 is not damaged and is convenient for repeated use.

[0042] The application provides a working principle of a Faraday cage reserved joint construction device for building engineering: when in use, the shielding plate 2 is first fixed on the formwork of the wall surface through wooden nails, the reserved joint of the Faraday cage net 1 is sequentially inserted into the slot hole 3 of the shielding plate 2 and the gap 512 of the convex pad 511, then the hydraulic mechanism 6 is driven through the operating mechanism 7, specifically, the pawl 72 is disengaged from the ratchet wheel 71 by rotating the operating handle 75, the spring one 69 releases the elastic force to push the push plate 64 to slide along the slide rod 68 in the oil cavity 61, the push plate 64 extrudes the hydraulic oil in the oil cavity 61, the hydraulic oil is delivered into the recess 4 through the oil channel 63, the extrusion frame 531 of the extrusion piece 53 is acted on, the corrugated elastic section 532 is stretched under the action of external force, the extrusion frame 531 pushes the abutting frame 521, the U-shaped elastic section 522 is deformed to enable the abutting frame 521 to have the moving ability, the pressure is uniformly transmitted to the convex pad 511, the convex pad 511 is flexibly deformed, and is closely attached to the wall surface profile and the reserved joint surface, the small unevenness of the wall surface and the gap between the joint and the slot hole 3 are filled, then the operating handle 75 is loosened, the pawl 72 is reset and clamped into the tooth groove of the ratchet wheel 71 by the torsional spring 74, the position of the main shaft 67 is locked, the pressure of the hydraulic mechanism 6 is maintained, the sealing state is stable, at this time, the floor steel bar construction and the concrete pouring can be carried out, after the concrete meets the conditions of form removal, the main shaft 67 is rotated by rotating the knob 76 outside the box body 66, the connecting rope 65 is wound and the push plate 64 is reset along the slide rod 68, the hydraulic oil flows back to the oil cavity 61, the pressure of the sealing assembly 5 is released, the main shaft 67 is wound with the connecting rope 65, the rope 83 is released synchronously, the spring two 84 releases the accumulated force to push the tapping plate 82 to slide along the slot 81 towards the wall body at a high speed, the tapping plate 82 hits the inner wall of the slot 81 to generate a reaction force, the shielding plate 2 is assisted to separate from the formwork, finally, the wooden nails fixing the shielding plate 2 are removed, the shielding plate 2 is taken out, and the clean reserved joint is exposed, so that the subsequent welding with another Faraday cage net 1 of the wall surface forms a complete cage body.

[0043] Embodiment two: the application provides a Faraday cage reserved joint construction process for building engineering, according to the Faraday cage reserved joint construction device for building engineering, the process comprises the following steps: Step one: cutting the Faraday cage net 1 according to the structure size, after the formwork construction is completed, the cut Faraday cage net 1 is installed on the formwork at the bottom of the plate.

[0044] Step two: bending the Faraday cage net 1 towards the wall surface at the joint position of the Faraday cage net 1 corresponding to the bottom of the plate and the wall surface, to form a reserved joint.

[0045] Step three: installing the shielding plate 2 at the reserved joint position of the Faraday cage net 1, inserting the reserved joint into the slot hole 3 of the shielding plate 2, and fixing the shielding plate 2 on the formwork of the wall surface through wooden nails.

[0046] Step four, the hydraulic mechanism 6 drives the sealing assembly 5 to make the convex pad 511 press the wall surface to form a seal, and the concrete pouring operation is carried out under the protection of the sealing assembly 5.

[0047] Step five, after the concrete solidifies, the shielding plate 2 is removed, the clean reserved joint is exposed, and the subsequent another Faraday cage net 1 is welded with the clean reserved joint to form a complete Faraday cage.

[0048] It should be noted that the above examples are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A Faraday cage reserved joint construction device for construction engineering, comprising a Faraday cage net (1) and a shielding plate (2) arranged at a reserved joint of the Faraday cage net (1), a side of the shielding plate (2) is provided with a plurality of slot holes (3) matched with the reserved joint, characterized in that, The side of the shielding plate (2) close to the wall surface is provided with a rectangular groove (4), and the groove (4) is provided with a sealing assembly (5). The sealing assembly (5) comprises a sealing piece (51), a leakage prevention piece (52) and an extrusion piece (53) arranged in the groove (4) in sequence. The sealing piece (51) comprises a convex pad (511) arranged on the side of the rectangular groove (4) close to the wall surface. The leakage prevention piece (52) comprises an abutting frame (521) and U-shaped elastic sections (522) symmetrically arranged on the side edges of the abutting frame (521). The side of the U-shaped elastic section (522) away from the abutting frame (521) is fixed in the groove (4). The extrusion piece (53) comprises an extrusion frame (531) and corrugated elastic sections (532) symmetrically arranged on the side edges of the extrusion frame (531). The side of the corrugated elastic section (532) away from the extrusion frame (531) is fixedly connected in the groove (4). The other side of the shielding plate (2) is provided with a hydraulic mechanism (6). The hydraulic mechanism (6) comprises an oil cavity (61) formed in the shielding plate (2), a liquid inlet pipe (62) communicated with the oil cavity (61) and a plurality of oil channels (63) arranged around the oil cavity (61) and leading to the groove (4). The oil cavity (61) is filled with hydraulic oil.

2. The Faraday cage pre- splice construction device for construction work according to claim 1, characterized in that, The hydraulic mechanism (6) comprises a push plate (64) slidingly arranged in the oil cavity (61), a plurality of connecting ropes (65) fixed on the push plate (64) and a box (66) fixed on the shielding plate (2). The box (66) is rotatably connected with a main shaft (67) for winding the connecting ropes (65). The main shaft (67) is provided with a control mechanism (7).

3. Faraday cage pre- splice construction device for construction engineering according to claim 2, characterized in that The oil cavity (61) is fixed with a sliding rod (68). The push plate (64) is provided with a hole (641) in sliding fit with the sliding rod (68). The sliding rod (68) is provided with a spring (69). The two ends of the spring (69) are fixed to the push plate (64) and the oil cavity (61) respectively.

4. The Faraday cage pre- splice construction device for construction work according to claim 2, characterized in that, The control mechanism (7) comprises a ratchet wheel (71) fixed on the main shaft (67) and a pawl (72) matched with the ratchet wheel (71). The pawl (72) is rotatably connected in the box (66) through a rotating shaft (73). The rotating shaft (73) is provided with a torsional spring (74). The two ends of the torsional spring (74) are fixed to the pawl (72) and the box (66) respectively.

5. Faraday cage pre- splice construction apparatus for construction engineering according to claim 4, characterized in that, The two sides of the shielding plate (2) are symmetrically provided with a pushing mechanism (8). The pushing mechanism (8) comprises a slot (81) formed in the shielding plate (2), a tapping plate (82) slidingly arranged in the slot (81), a rope (83) fixed on the tapping plate (82) and a spring (84) arranged between the tapping plate (82) and the slot (81). The other end of the rope (83) penetrates into the box (66) and is wound on the main shaft (67). The winding direction of the rope (83) is opposite to that of the connecting rope (65).

6. The Faraday cage pre- splice construction device for construction work according to claim 1, characterized in that, The abutting frame (521) is located between the convex pad (511) and the corrugated elastic section (532).

7. The Faraday cage pre- splice construction device for construction work according to claim 1, characterized in that, The convex pad (511) is provided with a notch (512) penetrating the slot hole (3).

8. The Faraday cage pre- splice construction device for construction work according to claim 3, characterized in that, Rubber rings (642) are arranged on both sides of the hole (641) to seal the outer surface of the slide rod (68).

9. The Faraday cage pre- splice construction apparatus for construction work according to claim 4, characterized by, One end of the rotating shaft (73) extends out of the box (66) and is fixed with an operating handle (75), and one end of the main shaft (67) extends out of the box (66) and is fixed with a knob (76).

10. A Faraday cage reserved joint construction process for construction engineering, the Faraday cage reserved joint construction device for construction engineering according to claim 5, characterized in that, The method comprises the following steps: Step one, cut the Faraday cage net (1) according to the structure size, after the template construction is completed, install the cut Faraday cage net (1) on the template on the plate bottom; Step two, at the joint position of the Faraday cage net (1) corresponding to the plate bottom and the wall surface, bend the Faraday cage net (1) towards the wall surface direction to form a reserved joint; Step three, install the shielding plate (2) at the reserved joint position of the Faraday cage net (1), make the reserved joint penetrate into the slot hole (3) of the shielding plate (2), and fix the shielding plate (2) on the template on the wall surface by using wooden nails; Step four, operate the hydraulic mechanism (6) to drive the sealing assembly (5), make the convex pad (511) press the wall surface to form a seal, and carry out concrete pouring operation under the protection of the sealing assembly (5); Step five, after the concrete is solidified, remove the shielding plate (2) to expose the uncontaminated reserved joint, and weld the subsequent Faraday cage net (1) with the clean reserved joint to form a complete Faraday cage.

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