Detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device and mounting method of detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device

Abstract

The invention provides a detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device and an installation method, and belongs to the technical field of building construction.The detachable turnover I-shaped steel beam lower hanging structure unsupported construction connecting device comprises a connecting system, a hanging system and an adjusting system; the hanging system and the adjusting system are connected with the connecting system in an assembled mode, the hanging system is used for fixedly installing a concrete slab main keel, and the adjusting system is used for adjusting the elevation of the concrete main keel and plays a role in reverse hanging and supporting. The connecting system comprises an L-shaped steel plate, two special-shaped steel plates, four rectangular steel plates, two connecting screws and a plurality of nuts. The connecting system is used for being connected with an I-shaped steel beam and can bear construction loads together with the I-shaped steel beam. The hanging system comprises a hanging rod, a nut, a steel base plate and a U-shaped groove. The problem that a bearing frame for traditional concrete keel construction is high in building time and cost can be solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of building construction, and in particular relates to a support-free construction connection device and an installation method for a detachable turnover I-beam underhanging structure. Background Art

[0002] With the vigorous development of the construction industry, there are more and more large-span structures. The construction and installation of large-span steel grid and concrete slab composite structures often adopt full-span scaffolding, Bailey beam + scaffolding combination, false scaffolding and other forms. However, for specific structures and even post-cast parts, the construction time and cost of assembling full-span scaffolding during the construction of large-span and high-space structures are the longest and the highest. Although the combination of Bailey beam + scaffolding can greatly reduce the volume of the frame and shorten the construction time to a certain extent, the cost is not much different from that of the full-span scaffolding. Although the use of false scaffolding has a simple structure and is more convenient to construct, it will still occupy the working surface and construction time of the grid construction for large-span steel grid and concrete slab composite structures.

[0003] Therefore, in the infrastructure construction boom, the original support frame construction method cannot meet the tight construction schedule. In order to ensure the low-cost and high-efficiency construction of large-span, high-space grid and concrete slab composite structures, an innovative detachable and revolving I-beam hanging structure without support construction connection device and installation method are proposed. The main keel of the concrete formwork is installed on the above-mentioned connection node for installation to complete the construction, which has great application prospects. Generally, it can be directly passed through the steel beam or the ear plate is welded on the upper part of the steel beam. However, after comprehensive analysis, passing the steel beam will affect the stress state and durability of the entire structure, and the welding ear plate will produce a certain shear stress on the contact area between the flange of the I-beam and the ear plate. After the ear plate is welded, in order to ensure the normal stress state of the structure, it can only be partially cut and recycled or even cannot be recycled. Therefore, a detachable and revolving I-beam hanging structure without support construction connection device and installation method are proposed. While ensuring the normal stress of the steel structure, it can be used in a turnover manner, the construction is convenient and the construction cost is reduced. Summary of the invention

[0004] In view of this, the present invention provides a support-free construction connection device and installation method for a detachable and revolving I-beam underhang structure, which can solve the problem of high time cost of building a bearing frame in traditional concrete keel construction, and further improve construction efficiency by utilizing the turnover of the detachable structure.

[0005] The present invention is achieved in that:

[0006] The present invention provides a support-free construction connection device for a detachable turnover I-beam underhanging structure, which includes a connection system, a hanging system and an adjustment system. The hanging system and the adjustment system are assembled and connected with the connection system. The hanging system is used to fix and install the main keel of the concrete slab. The adjustment system is used to adjust the elevation of the main keel of the concrete, and plays a role of reverse hanging support; the connection system includes an L-shaped steel plate, two special-shaped steel plates, four rectangular steel plates, two connecting screws and a plurality of nuts; the connection system is used to connect with the I-beam, and can be connected with the I-beam together Bear construction load; the hanging system includes a hanger, a nut, a steel pad and a U-shaped groove, one end of the hanger is installed and connected to the connection system through the steel pad, and the other end of the hanger is installed with the U-shaped groove and a nut for placing the main keel of the concrete slab; the adjustment system includes a visual adjustment pad and an adjustment nut, the visual adjustment pad is arranged between the steel pad and the adjustment nut, and the adjustment nut is used to adjust the elevation of the hanger, so as to realize the elevation adjustment of the U-shaped groove, thereby achieving the effect of the elevation of the main keel of the concrete slab.

[0007] The technical effects of a detachable and recyclable I-beam underhang structure unsupported construction connection device provided by the present invention are as follows: by setting a connection system, a hanging system and an adjustment system, after the construction of the current section is completed, the hanging system, the adjustment system and the connection system are dismantled in sequence, and the construction of the next section is started to achieve turnover use.

[0008] On the basis of the above technical solution, the unsupported construction connection device of the detachable turnover I-beam hanging structure of the present invention can also be improved as follows:

[0009] Among them, two of the special-shaped steel plates are arranged in parallel and spaced apart, four of the rectangular steel plates and a connecting screw are fixedly connected to one of the special-shaped steel plates, and a connecting hole for adapting to the connecting screw is opened on the other special-shaped steel plate, and the diameter of the connecting hole is slightly larger than the diameter of the connecting screw, which is convenient for aligning the connecting screw and inserting it for fixed installation; the special-shaped steel plate and the rectangular steel plate are high-strength alloy steel to ensure sufficient strength to withstand the construction load.

[0010] Furthermore, the rectangular steel plate and the end of one of the connecting screws are fixedly connected to the special-shaped steel plate by welding, the other connecting screw is welded and fixed to the L-shaped steel plate, the L-shaped steel plate is installed and fixed to the steel pad by the connecting screw, and the steel pad is also provided with a connecting hole adapted to the connecting screw.

[0011] Furthermore, the steel plate is provided with a connecting hole corresponding to the hanger, and the end of the hanger passes through the connecting hole to the outside, and is installed and connected at the outside of the connecting hole through the adjusting nut. Threaded structures are respectively provided on the top and bottom outer walls of the hanger, and the threaded structure at the top adopts fine pitch thread, and a matching internal thread is provided on the inner wall of the adjusting nut to improve the adjustment accuracy and ensure good fit and force transmission performance between the hanger and the adjusting nut to achieve elevation adjustment.

[0012] Furthermore, the threaded structure at the bottom is used to cooperate with the nut to install and connect the U-shaped groove at the bottom end of the hanger. A gasket is provided at the bottom of the hanger above the installation position of the U-shaped groove. The gasket is used to cooperate with the nut to fix the U-shaped groove. The U-shaped groove is used to tightly clamp the main keel of the concrete slab. The depth of the groove is used to ensure that the main keel of the concrete slab will not easily slip off after mounting. The depth of the groove is 1 / 2 to 2 / 3 of the diameter of the main keel of the concrete slab.

[0013] Furthermore, the U-shaped groove is made of high-strength steel, and an anti-slip gasket is installed on the upper surface of the groove. The anti-slip gasket is fixed to the upper surface of the U-shaped groove by bonding or bolting. The anti-slip gasket and the U-shaped groove are both provided with connecting holes that are adapted to the hanger rod. The anti-slip pad is provided with a corresponding groove at the position of the gasket corresponding to the bottom of the hanger rod, which is used to keep the supporting surface at the same horizontal height. The thickness of the anti-slip gasket is 3 to 5 mm.

[0014] Furthermore, the adjusting nut adopts a self-locking structure and has a hexagonal shape, which is convenient for operation with a wrench. The internal thread of the adjusting nut matches the fine thread segment at the top of the hanger. By rotating the adjusting nut, the protruding length of the adjusting nut in the fine thread segment can be adjusted, thereby achieving the adjustment of the elevation of the main keel of the concrete slab.

[0015] Furthermore, the special-shaped steel plates are provided with slots, and the special-shaped steel plates on both sides are used to cooperate with the L-shaped steel plates through the slots to form a clamping structure and be installed and connected with the upper horizontal steel of the I-beam. In addition, by first contacting and fixing the I-beam through the slots and then installing the L-shaped steel plates at corresponding positions, direct installation and connection at any segment position on the same I-beam can be achieved, thereby solving the disadvantage of installation from the end.

[0016] Furthermore, the bottom end of the visualization adjustment pad is fixedly mounted on the top of the steel pad, the visualization adjustment pad is engraved with a wide scale along the axial direction, and the scale range covers the elevation adjustment range, the visualization adjustment pad is provided with a pointer mechanism and a pressure compensation spring, the pointer mechanism is composed of a pointer body, a slider and a sliding track, the slider is fixedly connected to the pointer, and is used to enable the pointer to slide along the sliding track, the sliding track is fixedly mounted on the visualization adjustment pad, one end of the pressure compensation spring is fixedly connected to the slider of the pointer mechanism, and the other end is connected to the inside of the visualization adjustment pad, to ensure that the internal spring can transmit force evenly and produce effective compensation for the pointer mechanism.

[0017] The present invention provides a method for installing a support-free construction connection device of a detachable turnover I-beam underhanging structure, which comprises the following steps:

[0018] S10: First, four rectangular steel plates are arranged and fixed along the inner side of a special-shaped steel plate at intervals, one of the connecting screws and nuts is used to fix the L-shaped steel plate into one piece, and then another connecting screw and nut are used to connect another special-shaped steel plate close to the side of the L-shaped steel plate for tension and fixation;

[0019] S20: Fix the assembled connection system on the wage steel beam, pass one end of the hanger on the hanging system through the steel pad, use nuts to connect the screw rod and the connection system to fix it, pass the other end through the U-shaped groove and use nuts to fix it, and fix the main keel of the hanging concrete slab through the U-shaped groove;

[0020] S30: Install a visual adjustment pad and an adjustment nut above the hanger, and adjust the height of the U-shaped groove at the bottom of the hanger by screwing the adjustment nut to adjust the height of the main keel of the concrete slab;

[0021] S40: After completing steps S10 to S30, adjust the U-shaped groove elevation of the hanging system to the preset height by adjusting the adjusting nut of the system in combination with the visual adjusting pad. After the concrete slab construction is completed, remove the adjusting nut, U-shaped groove, hanging rod, visual adjusting pad, steel pad, and nut of the connecting system in turn, and use them in the construction of the next section after removal. Install according to the above steps S10 to S30 and use them in a cycle.

[0022] Compared with the prior art, the beneficial effects of the detachable and revolving I-beam underhang structure unsupported construction connection device and installation method provided by the present invention are: by constructing a connection system, a hanging system and an adjustment system based on the I-beam, the construction efficiency can be effectively improved; through its detachable and revolving design, the construction cost is greatly reduced, and resource waste and construction cost are reduced; there is no need to set up time-consuming support arrangements, which saves construction space, is conducive to the layout and management of the construction site, and inserts the construction process in advance; the connection is firm and reliable, has no impact on the steel beam structure, and can ensure construction quality and safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for use in the description of the embodiments of the present invention will be briefly introduced below. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative labor.

[0024] Figure 1 It is a schematic diagram of the installation of a support-free construction connection device for a detachable turnover I-beam hanging structure;

[0025] Figure 2 It is a schematic diagram of the connection system structure;

[0026] Figure 3 It is a schematic diagram of the structure of the visual adjustment pad;

[0027] Figure 4 It is a schematic diagram of the pointer mechanism structure;

[0028] Figure 5 It is a flow chart of an installation method of a support-free construction connection device for a detachable turnover I-beam hanging structure;

[0029] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0030] 1. Connection system; 11. L-shaped steel plate; 12. Special-shaped steel plate; 13. Rectangular steel plate; 14. Connection screw; 2. Hanging system; 21. Suspension rod; 22. Steel pad; 23. U-shaped groove; 3. Adjustment system; 31. Visual adjustment pad; 311. Pressure compensation spring; 312. Pointer mechanism; 313. Pointer body; 314. Slider; 315. Sliding track; 32. Adjustment nut; 4. Slot. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0032] like Figure 1-4 As shown, it is an embodiment of a detachable turnover I-beam hanging structure without support construction connection device provided by the present invention. In this embodiment, it includes a connection system 1, a hanging system 2 and an adjustment system 3. The hanging system 2 and the adjustment system 3 are assembled and connected with the connection system 1. The hanging system 2 is used to fix and install the main keel of the concrete slab. The adjustment system 3 is used to adjust the elevation of the main keel of the concrete, and plays the role of reverse hanging support; the connection system 1 includes an L-shaped steel plate 11, two special-shaped steel plates 12, four rectangular steel plates 13 and two connecting screws 14 and a plurality of nuts; the connection system 1 is used to connect with the I-beam, and can be connected with The I-beams jointly bear the construction load; the hanging system 2 includes a hanger 21, a nut, a steel pad 22 and a U-shaped groove 23. One end of the hanger 21 is installed and connected to the connection system 1 through the steel pad 22, and the other end of the hanger 21 is installed with the U-shaped groove 23 and a nut for placing the main keel of the concrete slab; the adjustment system 3 includes a visual adjustment pad 31 and an adjustment nut 32. The visual adjustment pad 31 is arranged between the steel pad 22 and the adjustment nut 32. The adjustment nut 32 is used to adjust the elevation of the hanger 21 to achieve the elevation adjustment of the U-shaped groove 23, thereby achieving the effect of the elevation of the main keel of the concrete slab.

[0033] Among them, in the above technical scheme, two special-shaped steel plates 12 are arranged in parallel and at intervals, four rectangular steel plates 13 and a connecting screw 14 are fixedly connected to one of the special-shaped steel plates 12, and a connecting hole for adapting to the connecting screw 14 is opened on the other special-shaped steel plate 12, and the diameter of the connecting hole is slightly larger than the diameter of the connecting screw 14, which is convenient for aligning and inserting the connecting screw 14 for fixed installation; the special-shaped steel plate 12 and the rectangular steel plate 13 are high-strength alloy steel to ensure sufficient strength to withstand the construction load.

[0034] Furthermore, in the above technical solution, the rectangular steel plate 13 and the end of one of the connecting screws 14 are fixedly connected to the special-shaped steel plate 12 by welding, and the other connecting screw 14 is welded and fixed to the L-shaped steel plate 11. The L-shaped steel plate 11 is installed and fixed to the steel pad 22 by the connecting screw 14, and the steel pad 22 is also provided with a connecting hole adapted to the connecting screw 14.

[0035] Furthermore, in the above technical scheme, a connecting hole is opened in the steel pad 22 corresponding to the hanger 21, and the end of the hanger 21 passes through the connecting hole to the outside, and is installed and connected by an adjusting nut 32 located outside the connecting hole. Threaded structures are respectively provided on the top and bottom outer walls of the hanger 21. The threaded structure at the top adopts fine pitch thread, and a matching internal thread is provided on the inner wall of the adjusting nut 32 to improve the adjustment accuracy and ensure good fit and force transmission performance between the hanger 21 and the adjusting nut 32 to achieve elevation adjustment.

[0036] Furthermore, in the above technical solution, the threaded structure at the bottom is used to cooperate with the nut to install the U-shaped groove 23 at the bottom end of the hanger 21. A gasket is arranged at the bottom of the hanger 21 above the installation position of the U-shaped groove 23. The gasket is used to cooperate with the nut to fix the U-shaped groove 23. The U-shaped groove 23 is used to tightly clamp the main keel of the concrete slab. The depth of the groove is used to ensure that the main keel of the concrete slab will not easily slip off after mounting. The depth of the groove is 1 / 2 to 2 / 3 of the diameter of the main keel of the concrete slab.

[0037] Furthermore, in the above technical scheme, the U-shaped groove 23 is made of high-strength steel, and an anti-slip gasket is installed on the upper surface of the groove. The anti-slip gasket is fixed to the upper surface of the U-shaped groove 23 by bonding or bolting. The anti-slip gasket and the U-shaped groove 23 are both provided with connecting holes that are adapted to the hanger 21. The anti-slip pad is provided with a corresponding groove at the position of the gasket at the bottom of the hanger 21, which is used to keep the supporting surface at the same horizontal height. The thickness of the anti-slip gasket is 3 to 5 mm.

[0038] Furthermore, in the above technical solution, the adjusting nut 32 adopts a self-locking structure and has a hexagonal shape, which is convenient for operation with a wrench. The internal thread of the adjusting nut 32 matches the fine thread segment at the top of the hanger 21. By rotating the adjusting nut 32, the protruding length of the adjusting nut 32 in the fine thread segment can be adjusted, thereby realizing the adjustment of the elevation of the main keel of the concrete slab.

[0039] Among them, one or more elastic elements, such as spring sheets or nylon rings, are arranged inside the self-locking adjusting nut 32. When the adjusting nut is tightened, the elastic element will produce corresponding deformation, increase the friction between the threads, and prevent the adjusting nut from loosening due to vibration and other reasons during construction; in addition, the surface of the adjusting nut can be galvanized or chrome-plated to improve its corrosion resistance.

[0040] Furthermore, in the above technical solution, a slot 4 is provided on the special-shaped steel plate 12, and the special-shaped steel plates 12 on both sides are used to cooperate with the L-shaped steel plate 11 through the slot 4 to form a clamping structure and be installed and connected with the upper horizontal steel of the I-beam. In addition, by first contacting and fixing the I-beam through the slot 4 and then installing the L-shaped steel plate 11 at the corresponding position, direct installation and connection at any segment position on the same I-beam can be achieved, which solves the disadvantage of installation from the end.

[0041] Furthermore, in the above technical solution, the bottom end of the visualization adjustment pad 31 is fixedly installed on the top of the steel pad 22, and a wide scale is engraved on the axial direction of the visualization adjustment pad 31, and the scale range covers the elevation adjustment range. A pointer mechanism 312 and a pressure compensation spring 311 are arranged on the visualization adjustment pad 31. The pointer mechanism 312 is composed of a pointer body 313, a slider 314 and a sliding track 315. The slider 314 is fixedly connected to the pointer, and is used to enable the pointer to slide along the sliding track 315. The sliding track 315 is fixedly installed on the visualization adjustment pad 31, and one end of the pressure compensation spring 311 is fixedly connected to the slider 314 of the pointer mechanism 312, and the other end is connected to the inside of the visualization adjustment pad 31, to ensure that the internal spring can transmit force evenly and produce an effective compensation effect on the pointer mechanism 312.

[0042] The visual adjustment pad 31 is located between the adjustment nut 32 and the steel pad 22, and plays the role of transmitting pressure and displaying the adjustment height. The pointer mechanism 312 is installed on the visual adjustment pad 31, and is closely connected to the pad but can move relatively independently; the pressure compensation spring 311 is installed between the pointer mechanism 312 and the visual adjustment pad 31, and is located in the middle of the two, and plays the role of connection and force transmission.

[0043] Among them, the pointer body 313 is a slender arrow-shaped structure used to point to the scale ruler, and its length is designed to ensure that it can clearly cover the scale range. The slider 314 is a connecting component between the pointer body 313 and the sliding track 315. It is fixedly connected to the pointer body 313 so that the pointer can move with the slider 314; the sliding track 315 is fixedly installed in the visual adjustment pad 31, and its position corresponds to the scale ruler on the pad, ensuring that the movement of the pointer on the sliding track 315 can accurately reflect the height change of the boom.

[0044] The pointer body 313 is mounted on the sliding track 315 through the slider 314. The slider 314 and the sliding track 315 are precisely matched with each other, such as a dovetail groove structure or a T-slot structure, so that the slider 314 can slide smoothly on the track and will not easily fall off the track. This connection method ensures the stability and accuracy of the pointer movement.

[0045] One end of the pressure compensation spring 311 is connected to the slider 314 of the pointer mechanism 312 or the bottom of the pointer body 313. The connection method can be through welding, hook connection or installation connection using a connecting piece so that it has a compressible range of motion; the other end is connected and fixed to the inner bottom wall of the visual adjustment pad 31, and the connection point can be selected at a position close to the edge of the scale to ensure that the spring can transmit force evenly and produce an effective compensation effect on the pointer mechanism 312.

[0046] Among them, in the above scheme, the suspension rod is moved up and down by rotating the adjusting nut. When the adjusting nut is rotated, the rotating motion of the adjusting nut is converted into the linear up and down movement of the suspension rod because the adjusting nut and the suspension rod are connected by fine pitch threads. The bottom of the adjusting nut contacts the upper layer of the visual adjustment pad. As the adjusting nut is rotated downward, it gradually applies pressure to the pressure compensation spring. As the suspension rod moves, the pressure compensation spring points to the current height scale through the connected pointer mechanism.

[0047] like Figure 5 The figure is a flow chart of a method for installing a support-free construction connection device for a detachable turnover I-beam hanging structure provided by the present invention, which includes the following steps:

[0048] S10: First, four rectangular steel plates 13 are arranged and fixed along the inner side of a special-shaped steel plate 12, and one of the connecting screws 14 and nuts is used to fix the L-shaped steel plate 11 into one body, and then another connecting screw 14 and nut are used to connect another special-shaped steel plate 12 close to the side of the L-shaped steel plate 11 to pull and fix it;

[0049] S20: The assembled connection system 1 is fixedly installed on the wage steel beam, one end of the suspension rod 21 on the hanging system 2 is passed through the steel pad 22, and a nut is used to fix the connection screw 14 and the connection system 1, and the other end is passed through the U-shaped groove 23 and fixedly installed with a nut, and the main keel of the hanging concrete slab is fixedly hung through the U-shaped groove 23;

[0050] S30: Install a visual adjustment pad 31 and an adjustment nut 32 above the suspension rod 21, and adjust the height of the U-shaped groove 23 at the bottom of the suspension rod 21 by screwing the adjustment nut 32 to adjust the height of the main keel of the concrete slab;

[0051] S40: After completing steps S10 to S30, adjust the elevation of the U-shaped groove 23 of the hanging system 2 to a preset height by adjusting the adjusting nut 32 of the adjusting system 3 in combination with the visual adjusting pad 31. After the concrete slab construction is completed, remove the adjusting nut 32, U-shaped groove 23, hanging rod 21, visual adjusting pad 31, steel pad 22 in sequence, and remove the nut of the connecting system 1 and use it in the construction of the next section. Install it according to the above steps S10 to S30 and reuse it.

Claims

1. A detachable turnover I-beam hanging structure unsupported construction connection device, characterized in that: The invention comprises a connection system (1), a hanging system (2) and an adjustment system (3), wherein the hanging system (2) and the adjustment system (3) are assembled and connected with the connection system (1), the hanging system (2) is used for fixing and installing the main keel of the concrete slab, and the adjustment system (3) is used for adjusting the elevation of the main keel of the concrete, thereby playing the role of reverse hanging support; the connection system (1) comprises an L-shaped steel plate (11), two special-shaped steel plates (12), four rectangular steel plates (13), two connecting screws (14) and a plurality of nuts; the connection system (1) is used for connecting with an I-beam and can bear the construction load together with the I-beam; the hanging system (2) comprises a suspension rod (21), a The invention relates to a method for adjusting the height of the hanging rod (21) and a connecting system (1). The method comprises: a nut, a steel pad (22) and a U-shaped groove (23); one end of the hanging rod (21) is connected to the connecting system (1) through the steel pad (22); the other end of the hanging rod (21) is installed with the U-shaped groove (23) and the nut for placing the main keel of the concrete slab; the adjusting system (3) comprises a visual adjustment pad (31) and an adjustment nut (32); the visual adjustment pad (31) is arranged between the steel pad (22) and the adjustment nut (32); the adjustment nut (32) is used to adjust the elevation of the hanging rod (21), thereby adjusting the elevation of the U-shaped groove (23), and thus achieving the effect of adjusting the elevation of the main keel of the concrete slab.

2. According to claim 1, a detachable turnover I-beam hanging structure unsupported construction connection device is characterized in that: The two special-shaped steel plates (12) are arranged in parallel and spaced apart, the four rectangular steel plates (13) and a connecting screw (14) are fixedly connected to one of the special-shaped steel plates (12), and a connecting hole for fitting the connecting screw (14) is opened on the other special-shaped steel plate (12), and the diameter of the connecting hole is slightly larger than the diameter of the connecting screw (14), so as to facilitate the insertion of the connecting screw (14) for fixed installation; the special-shaped steel plate (12) and the rectangular steel plate (13) are made of high-strength alloy steel to ensure sufficient strength to withstand the construction load.

3. The unsupported construction connection device of the detachable turnover I-beam hanging structure according to claim 2 is characterized in that: The rectangular steel plate (13) and the end of one of the connecting screws (14) are fixedly connected to the special-shaped steel plate (12) by welding, and the other connecting screw (14) is fixedly welded to the L-shaped steel plate (11). The L-shaped steel plate (11) is installed and fixed to the steel pad (22) via the connecting screw (14), and the steel pad (22) is also provided with a connecting hole adapted to fit the connecting screw (14).

4. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 3 is characterized in that: The steel pad (22) is provided with a connecting hole corresponding to the suspension rod (21), and the end of the suspension rod (21) penetrates the connecting hole to the outside and is installed and connected at the outside of the connecting hole through the adjusting nut (32). The top and bottom outer walls of the suspension rod (21) are respectively provided with threaded structures, and the threaded structure at the top adopts fine pitch thread, and the inner wall of the adjusting nut (32) is provided with a matching internal thread to improve the adjustment accuracy and ensure the good fit and force transmission performance between the suspension rod (21) and the adjusting nut (32) to achieve elevation adjustment.

5. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 4 is characterized in that: The threaded structure at the bottom is used to cooperate with the nut to be installed and connected to the U-shaped groove (23) at the bottom end of the suspension rod (21). A gasket is arranged at the bottom of the suspension rod (21) above the installation position of the U-shaped groove (23). The gasket is used to cooperate with the nut to fix the U-shaped groove (23). The U-shaped groove (23) is used to tightly clamp the main keel of the concrete slab. The depth of the groove is used to ensure that the main keel of the concrete slab will not easily slide off after mounting. The depth of the groove is 1 / 2 to 2 / 3 of the diameter of the main keel of the concrete slab.

6. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 5 is characterized in that: The U-shaped groove (23) is made of high-strength steel, and an anti-skid pad is installed on the upper surface of the groove. The anti-skid pad is fixed to the upper surface of the U-shaped groove (23) by bonding or bolting. The anti-skid pad and the U-shaped groove (23) are both provided with connecting holes adapted to the suspension rod (21). The anti-skid pad is provided with a matching groove at the position of the pad at the bottom of the suspension rod (21) to keep the receiving surface at the same horizontal height. The thickness of the anti-skid pad is 3 to 5 mm.

7. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 6 is characterized in that: The adjusting nut (32) adopts a self-locking structure and has a hexagonal shape, which is convenient for operation with a wrench. The internal thread of the adjusting nut (32) matches the fine thread segment at the top of the suspension rod (21). By rotating the adjusting nut (32), the protruding length of the adjusting nut (32) in the fine thread segment can be adjusted, thereby achieving the adjustment of the elevation of the main keel of the concrete slab.

8. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 7 is characterized in that: The special-shaped steel plate (12) is provided with a clamping groove (4), and the special-shaped steel plates (12) on both sides are used to cooperate with the L-shaped steel plates (11) through the clamping groove (4) to form a clamping structure and be installed and connected with the upper horizontal steel of the I-beam. In addition, by first contacting and fixing the I-beam through the clamping groove (4), and then installing the L-shaped steel plate (11) at the corresponding position, it is possible to directly install and connect any segment position on the same I-beam, thereby solving the disadvantage of installing from the end.

9. The unsupported construction connection device for the detachable turnover I-beam hanging structure according to claim 8 is characterized in that: The bottom end of the visualization adjustment pad (31) is fixedly mounted on the top of the steel pad (22); the visualization adjustment pad (31) is engraved with a wide scale along the axial direction, and the scale range covers the elevation adjustment range; the visualization adjustment pad (31) is provided with a pointer mechanism (312) and a pressure compensation spring (311); the pointer mechanism (312) is composed of a pointer body (313), a slider (314) and a sliding track (315); the slider (314) is fixedly connected to the pointer, and is used to enable the pointer to slide along the sliding track (315); the sliding track (315) is fixedly mounted on the visualization adjustment pad (31); one end of the pressure compensation spring (311) is fixedly connected to the slider (314) of the pointer mechanism (312), and the other end is connected to the inside of the visualization adjustment pad (31), so as to ensure that the internal spring can evenly transmit force and produce an effective compensation effect on the pointer mechanism (312).

10. A method for installing a support-free construction connection device for a detachable turnover I-beam hanging structure, characterized in that: The following steps are involved: S10: First, four rectangular steel plates (13) are arranged and fixed along the inner side of a special-shaped steel plate (12) at intervals, and one of the connecting screws (14) and nuts is used to fix the L-shaped steel plate (11) into one piece, and then another connecting screw (14) and nut are used to connect another special-shaped steel plate (12) to the side close to the L-shaped steel plate (11) for tension and fixation; S20: The assembled connection system (1) is fixedly installed on the wage steel beam, one end of the suspension rod (21) on the hanging system (2) is passed through the steel pad (22), and a nut is used to connect the corresponding screw rod (14) and the connection system (1) to fix the connection system, and the other end is passed through the U-shaped groove (23) and fixedly installed using a nut, and the main keel of the hanging concrete slab is fixedly installed through the U-shaped groove (23); S30: Install a visual adjustment pad (31) and an adjustment nut (32) above the suspension rod (21), and adjust the height of the U-shaped groove (23) at the bottom of the suspension rod (21) by screwing the adjustment nut (32) to achieve the purpose of adjusting the height of the main keel of the concrete slab; S40: After completing steps S10 to S30, the elevation of the U-shaped groove (23) of the hanging system (2) is adjusted to a preset height by adjusting the adjusting nut (32) of the adjusting system (3) in combination with the visual adjusting pad (31). After the concrete slab construction is completed, the adjusting nut (32), the U-shaped groove (23), the hanging rod (21), the visual adjusting pad (31), the steel pad (22), and the nut of the connecting system (1) are removed and used in the construction of the next section. The installation is carried out according to the above steps S10 to S30 and the system is used in a recycling manner.

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