Positioning and temporary support stabilization unloading device for grid hoisting and use method thereof

Abstract

The present invention discloses a positioning and temporary support stable unloading device for grid hoisting, comprising a support frame, a connecting base, an H-shaped support beam, a cushion block, a support limit plate and a jack assembly, wherein the connecting base is welded and fixed on the top surface of the support frame, the H-shaped support beam is welded and fixed on both sides of the top surface of the connecting base, and U-shaped support bases are welded and fixed on the two H-shaped support beams, and cushion blocks are clamped in the U-shaped card slots of the two U-shaped support bases; the use method of the present invention is: 1) installation of the docking part device; 2) installation of the unloading part device; 3) high-altitude docking of the grid roof in sections; 4) synchronous unloading operation. The present invention can ensure the installation accuracy of the grid roof when the grid roof is hoisted in sections through the device, and realize gradual and graded unloading during unloading, which can effectively avoid the grid structure from having large downward deflection, local rod overstress, node connection damage, collapse and other phenomena caused by improper unloading scheme, and ensure the stability and safety of the entire unloading process.

Description

Technical Field

[0001] The invention belongs to the technical field of grid structure hoisting, and in particular relates to a positioning and temporary support stabilizing unloading device for grid hoisting and a use method thereof. Background Art

[0002] At present, grid structures are often used in many airports, stations, stadiums and other building structures. This type of structure has the advantages of small spatial force, light weight, high rigidity and good seismic performance. However, it is difficult to install it in one go during construction and installation. The usual solution is to use temporary support frames for block lifting. This method involves the problem of unloading the original structure before the temporary support frames are removed. If the unloading plan is inappropriate, it is easy to cause large deflection of the original structure, overstress of local rods, damage to node connections, and even structural collapse in severe cases. Summary of the invention

[0003] The purpose of the present invention is to provide a technical solution for a positioning and temporary support stable unloading device for grid hoisting and a method of using the device and a method of using the device to address the deficiencies in the prior art. The overall structural design is ingenious and reasonable, easy to operate, highly practical, reusable, and easy to promote. The device can ensure the installation accuracy of the grid roof when it is hoisted in sections, and at the same time, achieve gradual and graded unloading during unloading, which can effectively avoid the grid structure from having a large downward deflection, local rod overstress, node connection damage, and even structural collapse caused by improper unloading schemes, thereby ensuring the stability and safety of the entire unloading process.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The positioning and temporary support stable unloading device for grid lifting is characterized in that it includes a support frame, a connecting base, an H-shaped support beam, a cushion block, a support limit plate and a jack assembly. The connecting base is welded and fixed to the top surface of the support frame, the H-shaped support beam is welded and fixed to the two side ends of the top surface of the connecting base, two H-shaped support beams are welded and fixed with U-shaped support bases, and cushion blocks are clamped in the U-shaped grooves of the two U-shaped support bases. The support limit plate is arranged between the two U-shaped support bases, and the end of the support limit plate is placed on the cushion block. The two ends of the support limit plate are limited by the limit piece, and the limit piece is fixedly connected to the U-shaped support base, and the jack assembly is located between the support limit plate and the connecting base.

[0006] Furthermore, the jack assembly includes a jack, a jack limit plate and a jack limit bolt. The jack is located at the center of the top surface of the connecting base. The jack limit plates are evenly distributed on the outer circumference of the jack. The jack limit plates are welded and fixed to the connecting base. The jack limit bolts pass through the jack limit plate and are pressed against the outer wall of the jack. The structural design is reasonable. The middle beam of the connecting base provides a support surface for the placement of the jack. The jack limit plate is welded and fixed to the middle beam, and then the jack limit bolts are installed. The jack is pressed and limited by the joint action of multiple jack limit bolts, thereby effectively ensuring the stability of the installation of the jack.

[0007] Furthermore, connecting holes are provided on both sides of the top surface of the H-shaped support beam, and pad limit bolts are provided in the connecting holes. The pad limit bolts are limited and abutted against the side end surface of the pad. The design of the connecting holes can facilitate the installation of the pad limit bolts, and pad limit bolts are installed on the left and right sides of each H-shaped support beam. The left and right sides of the pad in the U-shaped support base corresponding to the H-shaped support beam are limited and clamped by the pad limit bolts on both sides, thereby effectively preventing the misalignment of the pad and ensuring the stability of the pad placement, thereby making the entire device structure more stable and reliable. During the subsequent unloading process, the pad limit bolt is rotated downward each time to expose the top pad, so that the top pad can be pulled out from the side, effectively ensuring the smooth and safe performance during the unloading process.

[0008] Furthermore, the two U-shaped support bases are movably connected with a centering clamping assembly, which includes a connecting plate and a guide clamping assembly. A limiting column is arranged on the top surface of the support limiting plate, and the limiting column is located on the front and rear symmetrical center line of the support limiting plate. A centering hole is arranged in the middle of the connecting plate, and the centering hole matches the limiting column. The connecting plate is connected to the limiting column through the centering hole, and a limiting nut is arranged on the top of the limiting column. The centering clamping assembly can ensure that the support limiting plate is exactly located at the front and rear symmetrical center of the entire device, and then the limiting piece is used to limit and center the left and right sides of the support limiting plate, thereby effectively ensuring that the support limiting plate is located at the center of the entire device, ensuring the balance and stability of the entire device. The centering clamping assembly can not only play the role of centering and limiting, but also clamp and fix the two ends of the supporting and limiting plate, effectively ensuring the placement stability of the supporting and limiting plate, thereby ensuring the stable support of the support and limiting plate for the grid welding ball, and realizing the precise clamping installation of the connecting plate and the supporting and limiting plate through the limiting column and the centering hole, and then realizing the installation and fixation between the centering clamping assembly and the supporting and limiting plate with the tightening of the limiting nut, so that the centering clamping assembly can move synchronously with the supporting and limiting plate during the subsequent unloading process, so that the two ends of the supporting and limiting plate are always clamped and fixed by the centering clamping assembly during the unloading process, thereby ensuring the structural stability of the supporting and limiting plate during the unloading process, and improving the safety and stability of the unloading process.

[0009] The guide clamping components are symmetrically arranged at both ends of the connecting plate, and the two guide clamping components are respectively located on the two vertical sections of the U-shaped support base. The guide clamping components include a guide card frame and a clamping plate. The guide card frame is sleeved on the vertical section of the U-shaped support base through a guide card slot. An adjusting rod is fixedly connected to the clamping plate. A guide block is arranged on the guide card frame. An adjusting slot is arranged on the guide block. The end of the adjusting rod passes through the adjusting slot and extends to the outside of the guide block, and the adjusting rod is tightly fixed to the guide block by a set screw. The overall structure is compact and reasonable. The guide card frame is sleeved on the vertical section of the U-shaped support base to realize precise clamping installation between the guide clamping assembly and the U-shaped support base, ensuring that the centering hole of the connecting plate is exactly located in the front and rear symmetry of the U-shaped support base. The center line is convenient for the subsequent adjustment of the position of the support limit plate. At the same time, the guide card frame and the U-shaped support base are set, which does not affect the downward movement of the support limit plate during unloading. During the downward movement of the support limit plate, the guide card frame always moves synchronously along the vertical section of the U-shaped support base, effectively ensuring the stability of the unloading process of the support limit plate and improving the safety performance. The clamping plate is adjustable and fixed to the guide card frame through the adjusting rod and the guide block, so that the clamping plate can be adjusted according to the actual width of the support limit plate to ensure that the clamping plate is clamped and fixed to the side of the support limit plate. Loosen the fixing screw and adjust the length of the adjusting rod extending out of the adjusting slot to adjust the position of the clamping plate. The structural design is reasonable and has a wide range of applications.

[0010] Furthermore, two ejector assemblies are symmetrically arranged on the support limit plate, and the two ejector assemblies are located between the two U-shaped support bases. The ejector assembly includes a U-shaped fixed frame, a support guide plate and a push plate. The U-shaped fixed frame is welded on the support limit plate, and the support guide plate is welded and fixed at both ends of the U-shaped fixed frame. The push plate is movably connected between the two support guide plates. The ejector assembly can eject part of the upper pad out of the U-shaped slot through the push plate during the step-by-step unloading process, thereby facilitating the removal of the pad from the U-shaped slot. The design is more user-friendly and more convenient for actual unloading operations. The two ejector assemblies correspond to the two U-shaped support bases respectively. The U The U-shaped fixing frame can facilitate the installation between the ejection assembly and the support and limit plate, and ensure the firmness of the installation of the ejection assembly. The support guide plate and the U-shaped fixing frame are also welded and fixed to ensure the structural strength of the ejection assembly. The push plate is supported and limited by two support guide plates to ensure the stability and horizontality of the push plate during the pushing process, which is more convenient for the push plate to push the pad. The thickness of the push plate is not greater than the thickness of a pad. After the ejection assembly is installed, the top surface of the push plate is attached to the bottom surface of the support and limit plate, and the bottom surface of the push plate is supported and limited by the support guide plate, thereby ensuring the structural stability of the push plate itself, which is more convenient for the actual pushing operation and ensuring that the push plate only pushes the uppermost pad during each pushing operation.

[0011] Furthermore, the support guide plate is provided with a guide slide groove, both ends of the push plate are movably connected in the guide slide groove, a limit slide groove is provided on the bottom surface of the guide slide groove, a fixing hole is provided on the bottom surface of the rear end of the push plate, a limit block is screwed on the inner thread of the fixing hole, the limit block matches the limit slide groove, the limit block is movably connected in the limit slide groove, a convex plate is extended downwardly on the push plate, a push rod is provided on the convex plate, a placement cavity is formed between the guide slide grooves on the two support guide plates, thereby facilitating the limit installation between the push plate and the two support guide plates, and The design of the fixing hole on the bottom surface of the push plate can facilitate the threaded installation of the limit card block. The limit card block cooperates with the limit slide groove to achieve further limit card connection between the push plate and the support guide plate, making the pushing operation of the push plate more stable. The limit slide groove is a groove body closed at both ends, thereby preventing the push plate from completely sliding off the support guide plate during the pushing process or the pull-back and resetting process, thereby making it easier to operate the push assembly. The design of the convex plate can facilitate the installation of the push rod, and the actual pushing operation can be facilitated by the push rod.

[0012] Furthermore, the support limit plate includes a support box beam, an upper limit ring and a lower limit ring. The upper limit ring is located at the center of the top surface of the support box beam, and the lower limit ring is located at the center of the bottom surface of the support box beam. The upper limit ring can facilitate the lifting and placement of the grid welding ball, thereby improving the installation accuracy during lifting, and the lower limit ring can facilitate the limiting card connection at the top of the jack to ensure that the jack is installed in place. At the same time, it can effectively prevent the jack from being separated from the contact position with the support limit plate during unloading, thereby ensuring the normal progress of the unloading process and reducing the probability of accidents during the unloading process.

[0013] Furthermore, the limiting part includes a welding plate and a limiting bolt. The welding plate is welded and fixed on the top surface of the U-shaped support base. The welding plate is provided with a mounting hole. The limiting bolt is arranged in the mounting hole. The limiting bolt is limited and abuts against the side end surface of the support limiting plate. The welding plate is welded and fixed to the U-shaped support base to ensure the installation firmness of the limiting part, and the reserved mounting hole can facilitate the installation of the limiting bolt. The two U-shaped support bases correspond to two limiting parts, and the two limiting parts are respectively located on both sides of the support limiting plate, so that the two side ends of the support limiting plate are limited and clamped at the same time by the limiting bolts in the two limiting parts, thereby ensuring the installation stability of the support limiting plate.

[0014] The method for using the above-mentioned positioning and temporary support stable unloading device for grid hoisting is characterized by comprising the following steps:

[0015] 1) Installation of docking devices:

[0016] (1) First, weld and fix the tops of the four columns connecting the base and the support frame, then weld and fix the two H-shaped support beams at the two ends of the top surface of the connecting base, and then weld the two U-shaped support bases to the two H-shaped support beams respectively; the connecting base and the support frame, the H-shaped support beam and the connecting base, and the U-shaped support base and the H-shaped support beam are all placed by welding and fixing, which effectively ensures the structural firmness of the entire device after installation, ensures that the temporary support of the grid welding ball by the entire device is stable, and improves the safety performance of operation;

[0017] (2) The number of pads to be used is determined according to the height of the grid welding ball, and the determined number of pads are placed and clamped into the U-shaped slots of the U-shaped support base, and the pad limit bolts are installed into the corresponding reserved connection holes on the H-shaped support beam, and the two sides of the pad are limited by the pad limit bolts; the design and installation are reasonable, the two ends of the pad are limited by the two ends of the U-shaped slot, and the two sides of the pad are limited by the pad limit bolts, thereby effectively ensuring the stability of the pad on the U-shaped support base, ensuring the stable support of the pad to the support limit plate, and the design of the pad limit bolts is ingenious, which can facilitate subsequent unloading operations;

[0018] (3) Place the support limit plate between the two U-shaped support bases on which the cushion blocks are placed, and place the ends of the support limit plate on the uppermost cushion blocks; the cushion blocks lift and support the two ends of the support limit plate to ensure the installation height of the support limit plate, thereby facilitating the temporary support and lifting of the grid welding ball by the support limit plate;

[0019] (4) Assemble the centering clamping assembly, weld and fix the two guide card frames at the two ends of the connecting plate, weld and fix the clamping plate and the adjusting rod to form a clamping assembly, install the two clamping assemblies on the two guide card frames respectively, ensure that the clamping plates on the two clamping assemblies are arranged facing each other, insert the end of the adjusting rod into the adjusting groove of the guide card frame, and continue to move the adjusting rod to drive the clamping plate to approach the guide card frame until the side end face of the adjusting rod touches the side face of the corresponding guide card frame, and tighten the set screw; the guide card frame and the connecting plate are welded to ensure the structural strength of the centering clamping assembly, and the clamping plate and the adjusting rod are welded to ensure the connection between the two The firmness makes the two combined into an integrated structure to form a clamping assembly, which is convenient for the synchronous displacement of the clamping plate and the adjusting rod, so that the position of the clamping plate can be adjusted by adjusting the adjusting rod, so that the clamping plate can clamp and fix the support limit plates of different widths, and the adjusting groove realizes the precise installation and clamping of the adjusting rod and the corresponding guide card frame. In the initial state, the adjusting rod is moved and attached to the side of the guide card frame, which can ensure that the distance between the two clamping plates in the initial state is the maximum value within the adjustable range between the two, which is convenient for subsequent installation and ensures that when the subsequent centering clamping assembly is installed on the U-shaped support base, the end of the support limit plate can be located in the gap between the two clamping plates;

[0020] (5) Install the two assembled centering clamping assemblies on the two U-shaped support bases respectively, and respectively sleeve the two guide card frames on the two vertical sections of the U-shaped support base through the guide card slots, adjust the position of the support limit plate so that the centering hole on the connecting plate corresponds to the limit column on the support limit plate, insert the connecting plate into the limit column, and then screw the limit nut into the top of the limit column and tighten it; the guide card frame is clamped on the vertical section of the U-shaped support base to realize the movable sleeve connection between the centering clamping assembly and the U-shaped support base, and then the centering hole is accurately positioned and clamped with the limit column, thereby ensuring the accurate positioning of the support limit plate, so that the support limit plate is located The front-to-back symmetrical center line and the left-to-right symmetrical center line of the entire device are convenient for the further installation of the subsequent limit bolts to ensure the balance and stability of the entire device. The limit nuts are then tightened and fixed to fix the connecting plate and the support limit plate, so that the connecting plate can move synchronously with the descent of the support limit plate during the subsequent unloading process. The connecting plate is fixed by the guide card frame, thereby driving the guide card frame to move synchronously. The guide card frame is restricted by the U-shaped support base and slides synchronously along the vertical section of the U-shaped support base to guide and stabilize, so that the support limit plate is stable and reliable during the descent process, thereby improving the safety performance of the entire unloading operation.

[0021] (6) Loosen the set screw, move the adjustment rod toward the support limit plate until the clamping plate is pressed against the side surface of the support limit plate, and then tighten the set screw; the installation sequence is reasonable, loosen the set screw, adjust the position of the clamping plate, and clamp the two ends of the support limit plate through the clamping plate to ensure the stability of the support limit plate, improve the stable support and lifting of the grid welding ball by the support limit plate, and make the subsequent unloading process more stable and reliable;

[0022] (7) The two welding plates are welded to the top of the two U-shaped support bases respectively. After the welding is completed, the limiting bolts are installed in the mounting holes of the welding plates, and the two sides of the support limiting plate are limited by the limiting bolts; the welding and fixing of the welding plates can ensure the installation firmness between the welding plates and the U-shaped support base, and then the limiting bolts are installed in the reserved mounting holes, and the two side ends of the support limiting plate are limited by the limiting bolts, so as to further improve the stability of the support limiting plate, so that the support limiting plate can ensure the stability and firmness of the structure even in the unloading and descending process;

[0023] 2) Uninstall some devices:

[0024] (1) The jack is placed in the gap between the middle beam connecting the base and the support limit plate, so that the upper part of the jack is clamped inside the lower limit ring to prevent the jack from being separated from the contact position with the support limit plate during the unloading process, thereby ensuring the normal operation of the unloading device, reducing the probability of accidents during the unloading process, and improving the safety performance of the unloading operation;

[0025] (2) Place jack limit plates around the outside of the jack, weld the jack limit plates to the middle beam connected to the base, and then install a jack limit bolt on each jack limit plate, and turn the jack limit bolt in the direction of the jack until the jack limit bolt hits the outer wall of the jack; the installation design is reasonable, and multiple jack limit bolts are used to simultaneously press the outer wall of the jack against the limit, effectively ensuring the stability of the jack, and the fixing method is ingenious and reasonable, which can facilitate the subsequent disassembly and maintenance of the jack;

[0026] (3) Install two ejector assemblies, clamp the U-shaped fixing frame to the support limit plate, and then install the two support guide plates to the two ends of the U-shaped fixing frame, insert the plug on the support guide plate into the slot at the end of the U-shaped fixing frame, and then weld the support guide plate to the U-shaped fixing frame, and then push the push plate between the two support guide plates, clamp the two ends of the push plate into the guide grooves of the support guide plates, and then insert the limit card block into the limit groove at the bottom of the support guide plate, adjust the position of the push plate so that the limit card block corresponds to the fixing hole on the bottom surface of the push plate, screw the top of the limit card block into the fixing hole, move the U-shaped fixing frame to the specified installation position on the support limit plate, and then weld the U-shaped fixing frame to the support limit plate, weld the convex plate to the bottom surface of the push plate, and then The push rod is welded and fixed to the convex plate, and the welding fixation ensures the installation firmness of the push rod; the U-shaped fixing frame is first movably connected to the support limit plate, which can leave adjustment space for the subsequent installation and plugging between the push plate and the support guide plate. The support guide plate is first accurately plugged and positioned with the U-shaped fixing frame through the plug block and the slot, and then further welding fixation effectively ensures the installation firmness of the support guide plate and the U-shaped fixing frame. Then, by moving the U-shaped fixing frame, the push plate can be easily inserted into the guide grooves of the two support guide plates, and then the limit card block is installed from the bottom into the fixing hole of the push plate. The installation method is ingenious and reasonable, and easy to operate. Then, the U-shaped fixing frame is welded and fixed to the support limit plate by adjusting the position, thereby effectively ensuring the installation firmness of the ejection assembly;

[0027] 3) High-altitude docking of grid roof sections: hoist the grid welding balls according to the design requirements and place them on the upper limit ring, and then carry out docking construction;

[0028] 4) Synchronous uninstallation operation:

[0029] The push rod is then pulled back to move the top push plate away from the pad block until it contacts the other side of the limiting slot, and the stroke of the jack is adjusted back to the thickness value of one pad block; after the pad block limiting bolt moves downward to the position where one pad block can be withdrawn, the push rod is pushed, which can drive the push plate to push a portion of the top pad block out of the side of the U-shaped slot, thereby facilitating the grabbing of the pad block and realizing the withdrawal of the pad block. The design is user-friendly and more convenient for actual unloading operation;

[0030] (2) Repeat step (1) until the welding ball and the upper limit ring fall off naturally and the unloading is completed. During the whole unloading process, each lifting unit performs the unloading operation at the same time to ensure the safety of the unloading process, and the unloading is carried out in stages by gradually withdrawing the pads. Each unloading stroke is the thickness of a pad, which makes the unloading process smooth and controllable. It can avoid the phenomenon of large deflection of the original structure, overstress of local rods, damage to node connections, and even structural collapse caused by improper unloading scheme, and realize the synchronous unloading of the truss structure.

[0031] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0032] In the present invention, the grid welding ball is hoisted according to the design requirements and placed on the upper limit ring after the docking part device is installed, which can effectively solve the problem that the installation accuracy is difficult to control when the grid roof is hoisted in sections. During unloading, the upper part of the jack is located in the lower limit ring, thereby effectively preventing the jack from being separated from the contact position of the support limit plate during the unloading process, ensuring the smooth unloading process and reducing the probability of accidents during the unloading process. At the same time, during the unloading process, the support limit plate is always clamped and limited by the centering clamping assembly on the front and rear sides of the end, and the limit bolts are clamped on the left and right ends, thereby ensuring the stability of the unloading process of the support limit plate, and the design of the ejection assembly during unloading can facilitate the gradual withdrawal of the pad, the design is humanized, and it is more convenient for actual unloading operations. In addition, the step-by-step withdrawal of the pad is adopted to carry out graded unloading, and the unloading stroke of each level is the thickness of a pad, so that the entire unloading process is stable and controllable, which can avoid the original structure from generating large deflection, local rod overstress, node connection damage, and even structural collapse caused by improper unloading schemes, and realize the synchronous unloading of the truss structure. Moreover, the present invention adopts green steel, which can be reused, saves construction costs, has clear principles, is easy to implement and operate, has general control requirements, and is easy to promote. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be further described below in conjunction with the accompanying drawings:

[0034] Figure 1 It is a structural schematic diagram of the positioning and temporary support stable unloading device for hoisting of the grid frame in the present invention;

[0035] Figure 2 It is a schematic diagram of the installation structure of the centering clamping assembly and the supporting box beam in the present invention;

[0036] Figure 3 It is a structural schematic diagram of the H-shaped support beam in the present invention;

[0037] Figure 4 for Figure 3 Side view of

[0038] Figure 5 It is a structural schematic diagram of the U-shaped support base in the present invention;

[0039] Figure 6 It is a structural schematic diagram of the welding plate in the present invention;

[0040] Figure 7 It is a schematic diagram of the position structure of the mounting hole in the welding plate in the present invention;

[0041] Figure 8 It is a schematic diagram of the installation structure of the jack assembly and the connecting base in the present invention;

[0042] Fig. 9 for Figure 8 A top view of

[0043] Fig.10 It is a structural schematic diagram of the support and limiting plate in the present invention;

[0044] Fig.11 for Fig.10 A top view of

[0045] Fig.12 It is a schematic diagram of the installation structure of the centering clamping assembly, the U-shaped support base, and the support limit plate in the present invention;

[0046] Fig.13 It is a schematic diagram of the installation structure of the ejection assembly and the support and limiting plate in the present invention;

[0047] Fig.14 It is a structural schematic diagram of the centering clamping assembly in the present invention;

[0048] Fig.15 It is a schematic diagram of the installation position structure of the clamping plate, the adjusting rod and the guide clamp frame in the present invention;

[0049] Fig.16 It is a schematic diagram of the installation structure of the guide card frame and the connecting plate of the present invention;

[0050] Fig.17 It is a structural schematic diagram of the ejection assembly in the present invention;

[0051] Fig.18 It is a schematic diagram of the installation structure of the push plate and the support guide plate in the present invention;

[0052] Fig.19 It is a schematic diagram of the installation structure of the limit block and the push plate in the present invention;

[0053] Fig. 20 It is a schematic diagram of the installation structure of the support guide plate and the U-shaped fixing frame in the present invention;

[0054] Fig.21 It is a structural schematic diagram of the U-shaped fixing frame in the present invention.

[0055] In the figure: 1-support frame; 2-connecting base; 3-H-type support beam; 4-pad; 5-support limit plate; 6-jack assembly; 7-U-type support base; 8-U-type slot; 9-limiting piece; 10-jack; 11-jack limit plate; 12-jack limit bolt; 13-connecting hole; 14-pad limit bolt; 15-support box beam; 16-upper limit ring; 17-lower limit ring; 18-welding plate; 19-limit bolt; 20-mounting hole; 21-welding ball; 22-centering clamping assembly; 23-connecting plate; 24-guide clamping assembly; 25-limiting column; 26-centering hole; 27-limiting nut; 28-guide card frame; 29-pressing plate; 30-guide card slot; 31-adjusting rod; 32-guide block; 33- Adjusting slot; 34-setting screw; 35-ejection assembly; 36-U-shaped fixing frame; 37-support guide plate; 38-ejection plate; 39-guide slide groove; 40 limiting slide groove; 41-limiting card block; 42-convex plate; 43-ejection rod; 44-fixing hole; 45-slot; 46-insert block. DETAILED DESCRIPTION

[0056] like Figures 1 to 21As shown, the positioning and temporary support stable unloading device for grid hoisting of the present invention comprises a support frame 1, a connecting base 2, an H-shaped support beam 3, a cushion block 4, a support limit plate 5 and a jack assembly 6. The connecting base 2 is welded and fixed to the top surface of the support frame 1, the H-shaped support beam 3 is welded and fixed to the two side ends of the top surface of the connecting base 2, U-shaped support bases 7 are welded and fixed on the two H-shaped support beams 3, and cushion blocks 8 are clamped in the U-shaped grooves 8 of the two U-shaped support bases 7. The support limit plate 5 is arranged between the two U-shaped support bases 7, and the end of the support limit plate 5 is placed on the uppermost cushion block 4. The two ends of the support limit plate 5 are limited by the limit member 9, and the limit member 9 is fixedly connected to the U-shaped support base 7. The jack assembly 6 is located between the support limit plate 5 and the connecting base 2. A grid structure installation device is composed of a support frame 1, a connecting base 2, an H-shaped support beam 3, a U-shaped support base 7, a cushion block 4 and a support limit plate 5, wherein the height and installation position of the support frame 1 are determined according to the height of the grid welding ball 21 and the segmented lifting point, the various rods of the support frame 1 are connected into a whole by welding, the connection form between the bottom of the support frame 1 and the ground is determined according to the actual project situation, and the number of cushion blocks 4 is determined according to the installation height of the grid structure. An upper limit ring 16 is set above the support limit plate 5 to assist in the installation of the welding ball (bolt ball) and improve the installation accuracy of the grid structure hoisting. When unloading the support frame 1, a jack 10 is placed between the support limit plate 5 and the connecting base 2. The jack 10 is limited and tightened by the jack limit bolts 12, and the top of the jack 10 is clamped in the lower limit ring 17 to prevent the jack 10 from being separated from the contact position with the support limit plate 5 during the unloading process, thereby ensuring the normal operation of the unloading device and reducing the probability of accidents during the unloading process. In addition, by gradually withdrawing the pad 4 and gradually reducing the lifting stroke of the jack 10, the overall synchronous unloading of the grid is completed, and the entire unloading process is smooth and safe.

[0057] The jack 10 assembly 6 includes a jack 10, a jack limit plate 11 and a jack limit bolt 12. The jack 10 is located at the center of the top surface of the connecting base 2. The jack limit plate 11 is evenly distributed on the outer circumference of the jack 10. The jack limit plate 11 is welded and fixed to the connecting base 2. The jack limit bolt 12 passes through the jack limit plate 11 and is pressed against the outer wall of the jack 10. The structural design is reasonable. The middle beam of the connecting base 2 provides a support surface for the placement of the jack 10. The jack limit plate 11 is welded and fixed to the middle beam, and then the jack limit bolt 12 is installed. Through the joint action of multiple jack limit bolts 12, the jack 10 is pressed and limited, thereby effectively ensuring the installation stability of the jack 10.

[0058] The left and right sides of the top surface of the H-shaped support beam 3 are provided with connecting holes 13, and the connecting holes 13 are threaded holes. A pad limiting bolt 14 is arranged in the connecting holes 13, and the pad limiting bolt 14 is limited and abuts against the side end surface of the pad 4. The design of the connecting holes 13 can facilitate the installation of the pad limiting bolt 14. The left and right sides of each H-shaped support beam 3 are installed with pad limiting bolts 14. The left and right sides of the pad 4 in the U-shaped support base 7 corresponding to the H-shaped support beam 3 are limited and clamped by the pad limiting bolts 14 on both sides, thereby effectively preventing the pad 4 from misaligned and moving, ensuring the stability of the placement of the pad 4, and making the entire device structure more stable and reliable. During the subsequent unloading process, the pad limiting bolt 14 is rotated downward each time to expose the top pad 4, so that the top pad 4 can be pulled out from the side, effectively ensuring the smooth and safe performance during the unloading process.

[0059] The two U-shaped support bases 7 are both movably connected with a centering clamping assembly 22. The invention comprises a connecting plate 23 and a guide clamping assembly 24. A limiting column 25 is arranged on the top surface of the supporting and limiting plate 5. The limiting column 25 is located on the front-rear symmetrical center line of the supporting and limiting plate 5. A centering hole 26 is arranged in the middle of the connecting plate 23. The centering hole 26 matches the limiting column 25. The connecting plate 23 is clamped on the limiting column 25 through the centering hole 26. A limiting nut 27 is arranged on the top of the limiting column 25. The centering clamping assembly 22 can ensure that the supporting and limiting plate 5 is exactly located at the front-rear symmetrical center of the entire device, and then the limiting piece is used to limit and center the left and right sides of the supporting and limiting plate 5, so as to effectively ensure that the supporting and limiting plate 5 is located at the center of the entire device, and the balance and stability of the entire device are ensured. In addition, the centering clamping assembly 22 can clamp and fix the two ends of the supporting and limiting plate 5 while playing the role of centering and limiting, so as to effectively ensure the placement stability of the supporting and limiting plate 5, so as to ensure the stable support of the supporting and limiting plate 5 to the grid welding ball 21, and through the limiting column 25 and the centering hole 26 The connecting plate 23 and the supporting limit plate 5 are precisely clamped and installed, and then the limiting nut 27 is tightened to realize the installation and fixation between the centering clamping assembly 22 and the supporting limit plate 5, so that the centering clamping assembly 22 can move synchronously with the supporting limit plate 5 during the subsequent unloading process, so that the two ends of the supporting limit plate 5 are always clamped and fixed by the centering clamping assembly 22 during the unloading process, thereby ensuring the structural stability of the supporting limit plate 5 during the unloading process and improving the safety and stability of the unloading process.

[0060] The guide clamping components 24 are symmetrically arranged at both ends of the connecting plate 23. The two guide clamping components 24 are respectively located on the two vertical sections of the U-shaped support base 7. The guide clamping components 24 include a guide card frame 28 and a clamping plate 29. The guide card frame 28 is sleeved on the vertical section of the U-shaped support base 7 through a guide card slot 30. An adjusting rod 31 is fixedly connected to the clamping plate 29. A guide block 32 is arranged on the guide card frame 28. An adjusting slot 33 is arranged on the guide block 32. The end of the adjusting rod 31 passes through the adjusting slot 33 and extends to the outside of the guide block 32. The adjusting rod 31 is tightly fixed to the guide block 32 by a set screw 34. The overall structure is compact and reasonable. The guide card frame 28 The guide clamping assembly 24 is sleeved on the vertical section of the U-shaped support base 7 to achieve accurate clamping installation between the guide clamping assembly 24 and the U-shaped support base 7, ensuring that the centering hole 26 of the connecting plate 23 is exactly located on the front and rear symmetrical center line of the U-shaped support base 7, which is convenient for the subsequent adjustment of the position of the support limit plate 5. At the same time, the guide clamping frame 28 is sleeved with the U-shaped support base 7, and does not affect the downward movement of the support limit plate 5 during unloading. During the downward movement of the support limit plate 5, the guide clamping frame 28 always moves synchronously along the vertical section of the U-shaped support base 7, effectively ensuring the stability of the unloading process of the support limit plate 5 and improving the safety performance. The clamping plate 29 is adjusted by the adjustment rod 31 Cooperate with the guide block 32 to achieve adjustable fixation with the guide card frame 28, so that the clamping plate 29 can be adjusted according to the actual width size of the support limit plate 5, ensuring that the clamping plate 29 is clamped and fixed to the side of the support limit plate 5, loosen the fixing screw 34, adjust the length of the adjusting rod 31 extending out of the adjusting groove 33, so as to adjust the position of the clamping plate 29. The structural design is reasonable and has a wide range of applications.

[0061] Two ejection assemblies 35 are symmetrically arranged on the support and limiting plate 5. The two ejection assemblies 35 are located between the two U-shaped support bases 7. The ejection assembly 35 includes a U-shaped fixed frame 36, a support guide plate 37 and a push plate 38. The U-shaped fixed frame 36 is welded on the support and limiting plate 5. The support guide plate 37 is welded and fixed at both ends of the U-shaped fixed frame 36. The push plate 38 is movably connected between the two support guide plates 37. The ejection assembly 35 can eject part of the upper pad out of the U-shaped slot 8 through the push plate 38 during the step-by-step unloading process, thereby facilitating the removal of the pad from the U-shaped slot 8. The design is more user-friendly and more convenient for actual unloading operations. The two ejection assemblies 35 correspond to the two U-shaped support bases 7 respectively. The U-shaped fixed frame 36 can facilitate the installation between the ejection assembly 35 and the support and limiting plate 5 to ensure the firmness of the installation of the ejection assembly 35. The type fixing frame 36 is also fixed by welding to ensure the structural strength of the ejection assembly 35. The two support guide plates 37 are used to support and limit the push plate 38, thereby ensuring the stability and horizontality of the push plate 38 during the push process, thereby making it easier for the push plate 38 to eject the pad. The thickness of the push plate 38 is no greater than the thickness of a pad. After the ejection assembly 35 is installed, the top surface of the push plate 38 is attached to the bottom surface of the support and limit plate 5, and the bottom surface of the push plate 38 is supported and limited by the support guide plate 37, thereby ensuring the structural stability of the push plate 38 itself, making it easier to perform actual push operations, and ensuring that the push plate 38 only pushes the topmost pad during each push operation.

[0062] The support guide plate 37 is provided with a guide slot 39, and both ends of the push plate 38 are movably connected in the guide slot 39. The bottom surface of the guide slot 39 is provided with a limit slot 40. The bottom surface of the rear end of the push plate 38 is provided with a fixing hole 44. The fixing hole 44 is a threaded hole. The inner thread of the fixing hole 44 is screwed with a limit block 41. The limit block 41 matches the limit slot 40. The limit block 41 is movably connected in the limit slot 40. The push plate 38 A convex plate 42 is provided extending downward from the top, and a push rod 43 is provided on the convex plate 42. A placement cavity is formed between the guide grooves 39 on the two support guide plates 37, thereby facilitating the limited installation between the push plate 38 and the two support guide plates 37, and the design of the fixing holes 44 on the bottom surface of the push plate 38 can facilitate the threaded installation of the limit block 41. The limit block 41 cooperates with the limit groove 40 to achieve further limited connection between the push plate 38 and the support guide plate 37, making the pushing operation of the push plate 38 more stable, and the limit groove 40 is a groove body with closed ends, thereby preventing the push plate 38 from completely sliding out of the support guide plate 37 during the pushing process or the pull-back reset process, thereby facilitating the pushing operation of the push assembly, and the design of the convex plate 42 can facilitate the installation of the push rod 43, and the actual pushing operation can be facilitated by the push rod 43.

[0063] The support limit plate 5 includes a support box beam 15, an upper limit ring 16 and a lower limit ring 17. The upper limit ring 16 is located at the center of the top surface of the support box beam 15, and the lower limit ring 17 is located at the center of the bottom surface of the support box beam 15. The upper limit ring 16 can facilitate the hoisting and placement of the grid welding ball 21, thereby improving the installation accuracy during hoisting, and the lower limit ring 17 can facilitate the limiting card connection at the top of the jack 10 to ensure that the jack 10 is installed in place, and at the same time effectively prevent the jack 10 from being separated from the contact position with the support limit plate 5 during the unloading process, thereby ensuring the normal progress of the unloading process and reducing the probability of accidents during the unloading process.

[0064] The limiting member 9 includes a welding plate 18 and a limiting bolt 19. The welding plate 18 is welded and fixed on the top surface of the U-shaped support base 7. A mounting hole 20 is provided on the welding plate 18. The mounting hole 20 is a threaded hole. The limiting bolt 19 is arranged in the mounting hole 20. The limiting bolt 19 is limited and abuts against the side end surface of the support limiting plate 5. The welding plate 18 is welded and fixed to the U-shaped support base 7 to ensure the installation firmness of the limiting member 9, and the reserved mounting hole 20 can facilitate the installation of the limiting bolt 19. The two U-shaped support bases 7 correspond to two limiting members 9, and the two limiting members 9 are respectively located on both sides of the support limiting plate 5, so that the limiting bolts 19 in the two limiting members 9 are used to limit and clamp the two side ends of the support limiting plate 5 at the same time to ensure the installation stability of the support limiting plate 5.

[0065] The method for using the positioning and temporary support stabilization unloading device for hoisting the grid comprises the following steps:

[0066] 1) Installation of docking devices:

[0067] (1) First, weld and fix the tops of the four columns of the connecting base 2 and the support frame 1, then weld and fix the two H-shaped support beams 3 to the two ends of the top surface of the connecting base 2, and then weld the two U-shaped support bases 7 to the two H-shaped support beams 3 respectively; the connecting base 2 and the support frame 1, the H-shaped support beam 3 and the connecting base 2, and the U-shaped support base 7 and the H-shaped support beam 3 are all placed by welding and fixing, which effectively ensures the structural firmness of the entire device after installation, ensures that the temporary support of the grid welding ball 21 by the entire device is stable, and improves the operational safety performance;

[0068] (2) Determine the number of pads 4 to be used according to the height of the grid welding ball 21, place the determined number of pads 4 in the U-shaped slots 8 of the U-shaped support base 7, and install the pad limit bolts 14 in the corresponding reserved connection holes 13 on the H-shaped support beam 3, and limit the two sides of the pad 4 by the pad limit bolts 14; the design and installation are reasonable, the two ends of the pad 4 are limited by the two ends of the U-shaped slot 8, and the two sides of the pad 4 are limited by the pad limit bolts 14, thereby effectively ensuring the stability of the pad 4 on the U-shaped support base 7, ensuring the stable support of the pad 4 on the support limit plate 5, and the design of the pad limit bolts 14 is ingenious, which can facilitate the subsequent unloading operation;

[0069] (3) The support and limit plate 5 is placed between the two U-shaped support bases 7 on which the cushion blocks 4 are placed, and the ends of the support and limit plate 5 are placed on the uppermost cushion blocks 4; the cushion blocks 4 lift and support the two ends of the support and limit plate 5 to ensure the installation height of the support and limit plate 5, thereby facilitating the temporary support and lifting effect of the support and limit plate 5 on the grid welding ball 21;

[0070] (4) Assemble the centering clamping assembly 22, weld and fix the two guide card frames 28 to the two ends of the connecting plate 23, weld and fix the clamping plate 29 and the adjusting rod 31 to form a clamping assembly, and install the two clamping assemblies on the two guide card frames 28 respectively, ensuring that the clamping plates 29 on the two clamping assemblies are arranged facing each other, insert the end of the adjusting rod 31 into the adjusting groove 33 of the guide card frame 28, and continue to move the adjusting rod 31 to drive the clamping plate 29 to approach the guide card frame 28 until the side end surface of the adjusting rod 31 contacts the side surface of the corresponding guide card frame 28, and tighten the set screw 34; the guide card frame 28 and the connecting plate 23 are fixed by welding to ensure The clamping plate 29 and the adjusting rod 31 are welded and fixed to ensure the structural strength of the centering clamping assembly 22. The clamping plate 29 and the adjusting rod 31 are welded and fixed to ensure the firm connection between the two. The two are combined into an integrated structure to form a clamping assembly, which is convenient for the synchronous displacement of the clamping plate 29 and the adjusting rod 31. The position of the clamping plate 29 can be adjusted by adjusting the adjusting rod 31, so that the clamping plate 29 can clamp and fix the support limit plates 5 of different widths. The adjusting groove 33 realizes the precise installation and connection of the adjusting rod 31 and the corresponding guide card frame 28. In the initial state, the adjusting rod 31 is moved and attached to the side of the guide card frame 28. It can ensure that the distance between the two clamping plates 29 in the initial state is the maximum value within the adjustable range between the two, which is convenient for subsequent installation and ensures that when the centering clamping assembly 22 is subsequently installed on the U-shaped support base 7, the end of the support limit plate 5 can be located in the gap between the two clamping plates 29.

[0071] (5) Install the two assembled centering clamping assemblies 22 onto the two U-shaped support bases 7 respectively, and respectively sleeve the two guide card frames 28 onto the two vertical sections of the U-shaped support base 7 through the guide card slots 30, adjust the position of the support limit plate 5 so that the centering hole 26 on the connecting plate 23 corresponds to the limit column 25 on the support limit plate 5, and the connecting plate 23 is inserted into the limit column 25, and then the limit nut 27 is screwed into the top of the limit column 25 and tightened; the guide card frame 28 is clamped on the vertical section of the U-shaped support base 7 to realize the movable sleeve connection between the centering clamping assembly 22 and the U-shaped support base 7, and then the centering hole 26 is accurately positioned and clamped with the limit column 25, so as to ensure the accurate positioning of the support limit plate 5, so that the support The support limit plate 5 is located on the front-to-back symmetrical center line and the left-to-right symmetrical center line of the entire device, which is convenient for the further installation of the subsequent limit bolts 19 to ensure the balance and stability of the entire device. The limit nuts 27 are then tightened and fixed to fix the connecting plate 23 and the support limit plate 5, so that the connecting plate 23 can be synchronously displaced with the descent of the support limit plate 5 during the subsequent unloading process. The connecting plate 23 is fixed by the guide card frame 28, thereby driving the guide card frame 28 to move synchronously. The guide card frame 28 is restricted by the U-shaped support base 7 and slides synchronously along the vertical section of the U-shaped support base 7 to perform a guiding and stabilizing role, so that the support limit plate 5 is stable and reliable during the descent process, thereby improving the safety performance of the entire unloading operation.

[0072] (6) Loosen the set screw 34, move the adjustment rod 31 toward the support limit plate 5, until the clamping plate 29 is pressed against the side end surface of the support limit plate 5, and then tighten the set screw 34; the installation sequence is reasonable, loosen the set screw 34, adjust the position of the clamping plate 29, and clamp the two ends of the support limit plate 5 through the clamping plate 29 to ensure the stability of the placement of the support limit plate 5, improve the stable support and lifting of the grid welding ball 21 by the support limit plate 5, and make the subsequent unloading process more stable and reliable;

[0073] (7) The two welding plates 18 are welded to the tops of the two U-shaped support bases 7 respectively. After the welding is completed, the limiting bolts 19 are installed in the mounting holes 20 of the welding plates 18, and the two sides of the support limiting plate 5 are limited by the limiting bolts 19; the welding and fixing of the welding plates 18 can ensure the installation firmness between the welding plates 18 and the U-shaped support base 7, and then the limiting bolts 19 are installed in the reserved mounting holes 20, and the two side ends of the support limiting plate 5 are limited by the limiting bolts 19, so as to further improve the stability of the support limiting plate 5, so that the support limiting plate 5 can ensure the stability and firmness of the structure even in the unloading and descending process;

[0074] 2) Uninstall some devices:

[0075] (1) The jack 10 is placed in the gap between the middle beam connecting the base 2 and the support limit plate 5, so that the upper part of the jack 10 is clamped inside the lower limit ring 17 to prevent the jack 10 from being separated from the contact position with the support limit plate 5 during the unloading process, thereby ensuring the normal operation of the unloading device, reducing the probability of accidents during the unloading process, and improving the safety performance of the unloading operation;

[0076] (2) Place jack limit plates 11 around the outside of the jack 10, weld the jack limit plates 11 to the middle beam connected to the base 2, and then install a jack limit bolt 12 on each jack limit plate 11, and rotate the jack limit bolt 12 toward the jack 10 until the jack limit bolt 12 hits the outer wall of the jack 10; the installation design is reasonable, and multiple jack limit bolts 12 are used to simultaneously press the outer wall of the jack 10 to limit the position, so that the jack 10 is clamped and fixed, effectively ensuring the placement stability of the jack 10, and the fixing method is ingenious and reasonable, which can facilitate the subsequent disassembly and maintenance of the jack 10;

[0077] (3) Install two ejector assemblies 35, clip the U-shaped fixing frame 36 onto the support limit plate 5, and then install two support guide plates 37 onto both ends of the U-shaped fixing frame 36. Insert it into the slot 45 at the end of the U-shaped fixing frame 36, then weld the support guide plate 37 and the U-shaped fixing frame 36 to fix it, then push the push plate 38 between the two support guide plates 37, the two ends of the push plate 38 are clamped in the guide slide grooves 39 of the support guide plates 37, then insert the limit card block 41 from the limit slide groove 40 at the bottom of the support guide plate 37, adjust the position of the push plate 38 so that the limit card block 41 corresponds to the fixing hole 44 on the bottom surface of the push plate 38, screw the top of the limit card block 41 into the fixing hole 44, move the U-shaped fixing frame 36 to the specified installation position on the support limit plate 5, then weld the U-shaped fixing frame 36 and the support limit plate 5 to fix it, weld the protruding plate 42 to the bottom surface of the push plate 38, and then weld the push rod 43 to the protruding plate 42 The U-shaped fixing frame 36 is first movably connected to the support limit plate 5, which can leave adjustment space for the subsequent installation and insertion between the push plate 38 and the support guide plate 37. The support guide plate 37 is first precisely inserted and positioned with the U-shaped fixing frame 36 through the insert block 46 and the slot 45, and then further welded and fixed to effectively ensure the installation and firmness of the support guide plate 37 and the U-shaped fixing frame 36. Then, by moving the U-shaped fixing frame 36, the push plate 38 can be easily inserted into the guide grooves 39 of the two support guide plates 37, and then the limit card block 41 is installed from the bottom into the fixing hole 44 of the push plate 38. The installation method is ingenious and reasonable, and easy to operate. Then, by adjusting the position of the U-shaped fixing frame 36, it is welded and fixed to the support limit plate 5, thereby effectively ensuring the installation and firmness of the ejection assembly 35.

[0078] 3) High-altitude docking of grid roof sections: hoist the grid welding ball 21 according to the design requirements and place it on the upper limit ring, and then carry out docking construction;

[0079] 4) Synchronous uninstallation operation:

[0080] (1) The spacer block stop bolt 14 is rotated downward to a position where one spacer block 4 can be removed, and the push rod 43 is pushed. The push rod 43 drives the push plate 38 to move along the guide slot 39 toward the spacer block 4. At the same time, the stop block 41 at the bottom of the push plate 38 moves synchronously along the stop slot 40 until the stop block 41 is in position. When it contacts the end face of one side of the limiting slot 40, the push plate 38 pushes part of the top pad 4 to extend out of the U-shaped slot 8, pulls and pulls out the top pad 4 until the pad 4 is completely pulled out, and then pulls the push rod 43 to move the push plate 38 away from the pad 4 until the push plate 38 contacts the end face of the other side of the limiting slot 40, and adjusts the stroke of the jack 10 back to the thickness value of one pad 4; after the pad limit bolt 14 moves down to the position where one pad 4 can be pulled out, the push rod 43 is pushed, which can drive the push plate 38 to push out a part of the top pad 4 from the side of the U-shaped slot 8, thereby facilitating the grabbing of the pad 4 and realizing the removal of the pad 4. The design is user-friendly and more convenient for actual unloading operations;

[0081] (2) Repeat step (1) until the welding ball 21 and the upper limit ring 16 fall off naturally and the unloading is completed. During the whole unloading process, each lifting unit performs the unloading operation at the same time to ensure the safety of the unloading process, and the unloading is carried out in stages by gradually withdrawing the cushion block 4. Each unloading stroke is the thickness of a cushion block 4, so that the unloading process is smooth and controllable, which can avoid the original structure from producing large deflections, local rod overstress, node connection damage, and even structural collapse caused by improper unloading scheme, thereby realizing synchronous unloading of the truss structure.

[0082] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0083] In the present invention, the grid welding ball 21 is hoisted according to the design requirements and placed on the upper limit ring 16 after the docking part device is installed, which can effectively solve the problem that the installation accuracy is difficult to control when the grid roof is hoisted in sections. During unloading, the upper part of the jack 10 is located in the lower limit ring 17, thereby effectively preventing the jack 10 from being separated from the contact position of the support limit plate 5 during the unloading process, ensuring the smooth unloading process and reducing the probability of accidents during the unloading process. At the same time, during the unloading process, the support limit plate 5 is always clamped and limited by the centering clamping assembly 22 on the front and rear sides of the end, and the limit bolts 19 on the left and right ends, thereby ensuring the stability of the unloading process of the support limit plate 5. Moreover, during unloading, the design of the ejection assembly 35 can facilitate the gradual withdrawal of the pad 4, and the design is humanized, which is more convenient for actual unloading operations. The stepwise unloading method of gradually withdrawing the pad 4 is adopted to carry out graded unloading, and the unloading stroke of each stage is the thickness of a pad 4, so that the whole unloading process is stable and controllable, and the phenomena such as large deflection of the original structure, overstress of local rods, damage to node connections, and even structural collapse caused by improper unloading scheme can be avoided, and the synchronous unloading of the truss structure can be achieved. In addition, the present invention adopts green steel, which can be reused, saves construction costs, has clear principles, is easy to implement, and has general control requirements, and is easy to promote.

[0084] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. Positioning and temporary support stabilization unloading device for grid hoisting, characterized by: The jack assembly comprises a support frame, a connecting base, an H-shaped supporting beam, a cushion block, a supporting limit plate and a jack assembly, wherein the connecting base is welded and fixed to the top surface of the supporting frame, the H-shaped supporting beam is welded and fixed to the two side ends of the top surface of the connecting base, the two H-shaped supporting beams are welded and fixed to a U-shaped supporting base, the cushion blocks are clamped in the U-shaped clamping grooves of the two U-shaped supporting bases, the supporting limit plate is arranged between the two U-shaped supporting bases, the ends of the supporting limit plate are placed on the cushion blocks, the two ends of the supporting limit plate are limited by limiting members, the limiting members are fixedly connected to the U-shaped supporting base, the jack assembly is located between the supporting limit plate and the connecting base, connecting holes are arranged on the left and right sides of the top surface of the H-shaped supporting beam, cushion block limiting bolts are arranged in the connecting holes, the cushion block limiting bolts are limited and abut against the side end surfaces of the cushion blocks, and the two U-shaped supporting bases are movably clamped with a centering clamping assembly The top surface of the support limit plate is provided with a limiting column, and the limiting column is located on the front and rear symmetrical center line of the support limit plate, and the middle portion of the connecting plate is provided with a centering hole, and the centering hole matches the limiting column, and the connecting plate is clamped on the limiting column through the centering hole, and a limiting nut is provided on the top of the limiting column, and the guide clamping assembly is symmetrically arranged at both ends of the connecting plate, and the two guide clamping assemblies are respectively located on the two vertical sections of the U-shaped support base, and the guide clamping assembly comprises a guide card frame and a clamping plate, and the guide card frame is sleeved on the vertical section of the U-shaped support base through a guide card slot, and the clamping plate is fixedly connected with an adjusting rod, and a guide block is provided on the guide card frame, and an adjusting slot is provided on the guide block, and the end of the adjusting rod passes through the adjusting slot and extends to the outer side of the guide block, and the adjusting rod is tightly fixed to the guide block by a set screw.

2. The positioning and temporary support stabilizing unloading device for grid hoisting according to claim 1 is characterized in that: The jack assembly includes a jack, a jack limit plate and a jack limit bolt. The jack is located at the center of the top surface of the connecting base. The jack limit plate is evenly distributed on the outer circumference of the jack. The jack limit plate is welded and fixed to the connecting base. The jack limit bolt passes through the jack limit plate and is pressed against the outer wall of the jack.

3. The positioning and temporary support stabilizing unloading device for grid hoisting according to claim 1 is characterized in that: Two ejection assemblies are symmetrically arranged on the support and limit plate, and the two ejection assemblies are located between the two U-shaped support bases. The ejection assembly includes a U-shaped fixed frame, a support guide plate and a push plate. The U-shaped fixed frame is welded to the support and limit plate, and the support guide plate is welded and fixed at both ends of the U-shaped fixed frame, and the push plate is movably clamped between the two support guide plates.

4. The positioning and temporary support stabilizing unloading device for grid hoisting according to claim 3 is characterized in that: The support guide plate is provided with a guide slide groove, both ends of the push plate are movably clamped in the guide slide groove, the bottom surface of the guide slide groove is provided with a limit slide groove, the rear end bottom surface of the push plate is provided with a fixing hole, the fixing hole is internally threaded with a limit block, the limit block matches the limit slide groove, the limit block is movably clamped in the limit slide groove, a convex plate is extended downwardly from the push plate, and a push rod is provided on the convex plate.

5. The positioning and temporary support stabilizing unloading device for grid hoisting according to claim 1 is characterized in that: The limiting part includes a welding plate and a limiting bolt. The welding plate is welded and fixed on the top surface of the U-shaped support base. The welding plate is provided with a mounting hole. The limiting bolt is arranged in the mounting hole. The limiting bolt is limited and abuts against the side end surface of the support limiting plate.

6. The positioning and temporary support stabilizing unloading device for grid hoisting according to claim 1 is characterized in that: The support limiting plate comprises a support box beam, an upper limit ring and a lower limit ring, wherein the upper limit ring is located at the center of the top surface of the support box beam, and the lower limit ring is located at the center of the bottom surface of the support box beam.

7. The method for using the positioning and temporary support stabilization unloading device for hoisting of the grid according to claim 1 is characterized in that: The steps include: 1) Installation of docking devices: (1) First, weld and fix the tops of the four columns connecting the base and the support frame, then weld and fix the two H-shaped support beams at both ends of the top surface of the connecting base, and then weld the two U-shaped support bases to the two H-shaped support beams respectively; (2) Determine the number of pads to be used according to the height of the grid welding ball, place the determined number of pads in the U-shaped slots of the U-shaped support base, and install the pad limit bolts into the corresponding reserved connection holes on the H-shaped support beam. Use the pad limit bolts to limit the two sides of the pad; (3) Place the support limit plate between the two U-shaped support bases with the cushion blocks placed on them, with the end of the support limit plate resting on the uppermost cushion block; (4) Assemble the centering clamping assembly, weld and fix the two guide card frames at the two ends of the connecting plate, weld and fix the clamping plate and the adjusting rod to form a clamping assembly, install the two clamping assemblies on the two guide card frames respectively, ensure that the clamping plates on the two clamping assemblies are arranged facing each other, insert the end of the adjusting rod into the adjusting groove of the guide card frame, and continue to move the adjusting rod to drive the clamping plate to approach the guide card frame until the side end surface of the adjusting rod contacts the side surface of the corresponding guide card frame, and tighten the set screw; (5) Install the two assembled centering clamping assemblies onto the two U-shaped support bases respectively, and respectively sleeve the two guide card frames onto the two vertical sections of the U-shaped support base through the guide card slots. Adjust the position of the support limit plate so that the centering hole on the connecting plate corresponds to the limit column on the support limit plate. Insert the connecting plate onto the limit column, and then screw the limit nut into the top of the limit column and tighten it. (6) Loosen the set screw and move the adjusting rod toward the support limit plate until the clamping plate is pressed against the side surface of the support limit plate, then tighten the set screw. (7) Weld the two welding plates to the top of the two U-shaped support bases respectively. After welding, install the limit bolts in the mounting holes of the welding plates, and limit the two sides of the support limit plates through the limit bolts; 2) Uninstall some devices: (1) Place the jack in the gap between the middle beam connecting the base and the support limit plate, so that the upper part of the jack is clamped inside the lower limit ring to prevent the jack from being separated from the support limit plate during unloading, ensuring the normal operation of the unloading device; (2) Place jack limit plates around the outside of the jack, weld the jack limit plates to the middle beam connected to the base, and then install a jack limit bolt on each jack limit plate, and turn the jack limit bolt toward the jack until the jack limit bolt hits the outer wall of the jack; (3) Install two ejector assemblies, clamp the U-shaped fixing frame to the support limit plate, and then install the two support guide plates to the two ends of the U-shaped fixing frame, insert the plug on the support guide plate into the slot at the end of the U-shaped fixing frame, and then weld the support guide plate to the U-shaped fixing frame, and then push the push plate between the two support guide plates, clamp the two ends of the push plate into the guide slide groove of the support guide plate, and then insert the limit card block into the limit slide groove at the bottom of the support guide plate, adjust the position of the push plate so that the limit card block corresponds to the fixing hole on the bottom surface of the push plate, screw the top of the limit card block into the fixing hole, move the U-shaped fixing frame to the specified installation position on the support limit plate, and then weld the U-shaped fixing frame to the support limit plate, weld the convex plate to the bottom surface of the push plate, and then weld the push rod to the convex plate; 3) High-altitude docking of grid roof sections: hoist the grid welding balls according to the design requirements and place them on the upper limit ring, and then carry out docking construction; 4) Synchronous uninstallation operation: (1) Turn the pad limit bolt downward to the position where one pad can be removed, push the push rod, and the push rod drives the push plate to move along the guide slot toward the pad. At the same time, the limit block at the bottom of the push plate moves synchronously along the limit slot until the limit block hits one end face of the limit slot. The push plate pushes part of the top pad out of the U-shaped slot and pulls the top pad out until the pad is completely removed. Then pull the push rod to move the push plate away from the pad until the push plate hits the other end face of the limit slot, and adjust the stroke of the jack back to the thickness value of one pad. (2) Repeat step (1) of the above synchronous unloading operation until the welding ball and the upper limit ring fall off naturally, and the unloading is completed.

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