A prefabricated large-span double T-plate hoisting device and process

Abstract

The present invention discloses a prefabricated large-span double-T-plate lifting device and process in the field of industrial building technology, comprising a double-T-plate and two gantry cranes, the hoists of the gantry cranes are both equipped with a four-point lifting steel wire rope; a first lifting ring, four first lifting rings with rectangular end points are respectively embedded on both sides of the upper end of the double-T-plate; two clamping mechanisms, the two clamping mechanisms jointly fix the double-T-plate through the first lifting rings on both sides of the double-T-plate, and the two gantry cranes can lift the corresponding clamping mechanisms through the steel wire ropes in a four-point lifting manner; the clamping mechanisms are used to assist the double-T-plate to land accurately; the prefabricated large-span double-T-plate is lifted by two machines, so as to achieve smooth and accurate demoulding, lifting, transportation and placement of large-span prefabricated components.

Description

Technical Field

[0001] The invention relates to the technical field of industrial buildings, in particular to a prefabricated large-span double T-plate hoisting device and process. Background Art

[0002] Conventional large-span prefabricated components are usually processed and manufactured in factories. Due to the excessive length of the components, they often need to obtain corresponding special equipment transportation certificates during transportation, which increases the difficulty of mass production and transportation. In addition, due to the weight and cost of large-span prefabricated components, they cannot be transported over long distances. Therefore, large-span prefabricated components are often processed and manufactured directly at the location of the project.

[0003] When selecting component lifting equipment, truck cranes or crawler cranes are often used. Truck cranes need to extend their legs during lifting and cannot travel under load. They are not suitable for soft or muddy places and have poor stability. Crawler cranes occupy a large area, have difficulty in vehicle maneuverability, and require professional drivers to operate, which is not conducive to the needs of large-scale production lifting and transportation at the construction site. Summary of the invention

[0004] The purpose of the present invention is to provide a prefabricated large-span double T-plate lifting device and process to solve the problem raised in the above background technology that the selection of component lifting equipment often adopts a truck crane or a crawler crane. The truck crane needs to extend its legs during lifting and cannot travel under load. It is not suitable for soft or muddy places and has poor stability. The crawler crane occupies a large area, has difficult vehicle maneuverability, and requires a professional driver to operate, which is not conducive to the needs of large-scale production lifting and transportation at the construction site.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a prefabricated large-span double T-plate lifting device, comprising a double T-plate, comprising two gantry cranes, the hoists of the gantry cranes are both equipped with four-point lifting wire ropes; a first lifting ring, four first lifting rings with rectangular end points are respectively embedded on both sides of the upper end of the double T-plate; two clamping mechanisms, the two clamping mechanisms respectively fix the double T-plate through the first lifting rings on both sides of the double T-plate, and the two gantry cranes can lift the corresponding clamping mechanisms through the wire ropes in a four-point lifting manner; the clamping mechanism is used to assist the double T-plate to land accurately.

[0006] As a further solution of the present invention, the clamping mechanism includes a first mounting plate, wherein retractable threaded legs are provided at both front and rear ends of the first mounting plate, a steering mechanism is provided below the first mounting plate, the lower end of the steering mechanism is connected to the second mounting plate, four connecting rods which can be fixedly connected to the first lifting ring are vertically provided below the second mounting plate, the second lifting ring is fixedly connected to the position of the first lifting ring at the upper end of the first mounting plate corresponding to the first lifting ring, the second lifting ring is directly connected to the wire rope, the first mounting plate is provided with a descending mechanism, the descending mechanism is connected to the upper end of the steering mechanism, the descending mechanism is used to control the descent of the second mounting plate, and the steering mechanism is used to control the horizontal movement of the second mounting plate.

[0007] As a further solution of the present invention, the descending mechanism includes a screw rod, and a transmission mechanism is arranged in the first mounting plate. The transmission mechanism is used to convert the gravity of the double T plate into a downward extrusion force of the threaded legs. The screw rod vertically penetrates the first mounting plate and is threadedly connected to the transmission mechanism in the first mounting plate. The lower end of the screw rod is rotatably connected to the upper end of the steering mechanism, and the upper end of the screw rod is fixedly connected to a turntable.

[0008] As a further scheme of the present invention, the transmission mechanism includes a first hydraulic chamber, the first hydraulic chamber is vertically opened at the center position of the first mounting plate, and second hydraulic chambers are opened at both ends of the first mounting plate. The upper ends of the two threaded legs respectively penetrate the first mounting plate and are connected to the two second hydraulic chambers, and the threaded legs are vertically slidably connected to the first mounting plate. A flow channel is penetrated between the second hydraulic chamber and the first hydraulic chamber, a valve is fixedly arranged in the flow channel, and a sealing rod for controlling the opening and closing of the valve is arranged in the valve, the sealing rod vertically penetrates from the upper end of the first mounting plate to the valve, and the sealing rod is threadedly connected to the first mounting plate; a piston is vertically slidably connected in the first hydraulic chamber, and a first sliding rod is vertically fixedly connected to the lower end of the piston, the first sliding rod downwardly penetrates the first mounting plate and is vertically slidably connected to the first mounting plate, and the screw rod penetrates the first sliding rod from the axis of the first sliding rod and is threadedly connected to the first sliding rod.

[0009] As a further solution of the present invention, the steering mechanism includes a third mounting plate, the third mounting plate is rotatably connected to the lower end of the screw, the upper end of the third mounting plate is vertically fixedly connected to a second sliding rod, the second sliding rod vertically penetrates the first mounting plate and is vertically slidably connected to the first mounting plate, the lower end of the third mounting plate is laterally slidably connected to the first slide plate, the lower end of the first slide plate is longitudinally slidably connected to the second slide plate, the lower end of the second slide plate is rotatably connected to the first connecting block in the horizontal direction, and a second connecting block is provided at the upper end of the second mounting plate, the first connecting block and the second connecting block are rotatably connected in the vertical direction, a locking mechanism is externally connected between the first connecting block and the second connecting block, and the locking mechanism is used to lock the first connecting block and the second connecting block.

[0010] As a further solution of the present invention, the upper end of the connecting rod is fixedly connected to a third slider, the upper end of the third slider is laterally slidably connected to a fourth slider, the fourth slider is longitudinally slidably connected to the lower end of the second mounting plate, and the third slider and the fourth slider are both externally connected to a second locking mechanism, and the second locking mechanism is used to lock the positions of the third slider and the fourth slider.

[0011] As a further scheme of the present invention, the lower end of the second connecting block is fixedly connected to a rotating shaft, the rotating shaft passes through the second mounting plate and is rotatably connected to the second mounting plate, the lower end of the rotating shaft is fixedly connected to a direction rod, the trajectory of the direction rod is parallel to the rotation direction between the first connecting block and the second connecting block, and a first through slot is vertically penetrated on both sides of the direction rod, and a first telescopic rod and a second telescopic rod that cross each other are respectively arranged upper and lower between the third sliding blocks in the same row, the ends of the first telescopic rod and the second telescopic rod are respectively rotatably connected to the left and right ends of two third sliding blocks in the same row, the first telescopic rod is vertically penetrated by a second through slot, and the upper end of the second telescopic rod is vertically fixedly connected to a third sliding rod, and the third sliding rod is slidably connected to the corresponding first through slot and second through slot.

[0012] The hoisting process of the prefabricated large-span double T-plate hoisting device is as follows:

[0013] S1. During operation, the first lifting rings are embedded at a certain distance from the edge at both ends of the prefabricated large-span double T-plate. Eight first lifting rings are embedded in a single double T-plate.

[0014] S2. A track truss gantry crane is set up at the construction site, and a four-point lifting wire rope is installed under the single gantry crane;

[0015] S3. Start the gantry crane's lifting device at the same time, lift the double T-plate 200mm away from the mold, observe the stability of the gantry crane's lifting device and the status of the prefabricated components, and lift them synchronously for transportation after confirming that everything is normal;

[0016] S4. Two gantry cranes are used to lift the double T-plate using eight-point lifting method. The lifting must be carried out synchronously. The power of the gantry cranes, the length of the wire rope, and the lifting points must be synchronized and consistent. The operators must perform lifting, walking, and placing synchronously to maintain the stability of the prefabricated components.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] By using dual lifting machines to prefabricate large-span double T-plates and applying the principle of spatial stability, the dual lifting machines can stably transport the components, and achieve smooth and accurate demoulding, lifting, transportation, and placement of large-span prefabricated components. The use of a same-track truss gantry crane can solve the defect of instability in component lifting due to unbalanced lateral forces, and improve the possibility of safety risks on the construction site. Secondly, the dual lifting machines can achieve stability in the transportation of prefabricated large-span double T-plate structures, and ensure the quality of concrete components. Most importantly, this invention saves labor and construction machinery investment to a certain extent, eliminates the need for secondary precision adjustment of large-span prefabricated components when they are lifted into place, and achieves cost reduction and efficiency improvement for the project.

[0019] The present invention adds a clamping mechanism, so that during the installation process of the double T-plate, the flexible rope lifting is changed to the rigid clamping mechanism lifting, and further the double T-plate can be more accurately adjusted in position with higher efficiency.

[0020] The present invention rotates the screw rod to make the screw rod move down smoothly with the double T-plate, and the process is stable. The impact strength of the double T-plate falling to the ground is easier to control than that of the traditional hoisting landing. The double T-plate and the building can be effectively protected, and the construction quality is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a structural schematic diagram of the present invention without the gantry crane;

[0023] Figure 3 It is a structural schematic diagram of a double T-plate;

[0024] Figure 4 is a structural schematic diagram of the clamping mechanism;

[0025] Figure 5 for Figure 4 Schematic diagram of the structure viewed from above;

[0026] Figure 6 for Figure 4 A schematic diagram of a side cross-section structure;

[0027] Figure 7 for Figure 4 Schematic diagram of the cross-section structure;

[0028] Figure 8 It is a schematic diagram of the process flow of the present invention.

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

[0030] Double T-plate 11, gantry crane 12, wire rope 13, first lifting ring 14, first mounting plate 21, threaded support leg 22, second mounting plate 23, connecting rod 24, second lifting ring 25, screw 31, turntable 32, first hydraulic chamber 41, second hydraulic chamber 42, flow channel 43, valve 44, sealing rod 45, piston 46, first slide bar 47, third mounting plate 51, second slide bar 52, first slide plate 53, second slide plate 54, first connecting block 55, second connecting block 56, third slider 61, fourth slider 62, rotating shaft 71, direction rod 72, first through groove 73, first telescopic rod 74, second telescopic rod 75, second through groove 76, third slide bar 77. DETAILED DESCRIPTION

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be briefly introduced below in combination with the drawings and the description of the embodiments or the prior art. Obviously, the following description of the structure of the drawings is only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention.

[0032] See also Figure 1-Figure 8 , the present invention provides a technical solution: a prefabricated large-span double T-plate hoisting device, including a double T-plate 11, including two gantry cranes 12, and the cranes of the gantry cranes 12 are both hoisted with a four-point lifting wire rope 13;

[0033] First lifting rings 14, four first lifting rings 14 with rectangular end points are pre-buried on both sides of the upper end of the double T-plate 11;

[0034] Two clamping mechanisms, the two clamping mechanisms jointly fix the double T-plate 11 through the first lifting rings 14 on both sides of the double T-plate 11, and the two gantry cranes 12 can lift the corresponding clamping mechanisms in a four-point lifting manner through the wire ropes 13; the clamping mechanisms are used to assist the double T-plate 11 to land accurately.

[0035] Pre-buried round steel lifting rings are set at a certain position away from the edge at both ends of the prefabricated large-span double T-plate 11, four first lifting rings 14 are buried on one side, and eight first lifting rings 14 are buried in a single double T-plate 11; two rail truss gantry cranes 12 are set at the construction site, and a four-point lifting wire rope 13 is set under the single gantry crane 12. At the same time, the lifting device of the gantry crane 12 is started, and the double T-plate is first lifted 200mm away from the mold, and the stability of the gantry crane 12 lifting device and the state of the prefabricated components are observed. After confirming that everything is normal, it is lifted and transported synchronously, and eight first lifting rings 14 are buried in the prefabricated double T-plate to cooperate with two clamping mechanisms for hanging hooks in the double-machine lifting process. The two gantry cranes 12 lift the double T-plate 11 in an eight-point lifting manner, and the lifting needs to be carried out synchronously. The power of the gantry crane 12 crane and the length and lifting point of the wire rope 13 must be synchronized and consistent. The operator performs lifting, walking, and placement synchronously to maintain the stability of the prefabricated components;

[0036] By using double-machine lifting to prefabricate large-span double T-plate 11 and applying the principle of spatial stability, the double-machine lifting can stably transport the components, and realize smooth and accurate demoulding, lifting, transportation and placement of large-span prefabricated components. The same-track truss gantry crane 12 is adopted to solve the defect of unstable component lifting due to unbalanced lateral force, and improve the possibility of safety risks on the construction site. Secondly, the double-machine lifting can realize the stability of the structural transportation of the prefabricated large-span double T-plate 11, and ensure the quality of concrete components. Most importantly, the inventive method saves the investment in labor and construction machinery to a certain extent, eliminates the secondary precision adjustment of the large-span prefabricated components when lifting them into place, and realizes cost reduction and efficiency improvement for the project.

[0037] The present invention uses eight-point lifting and the principle of spatial stability to stabilize the position of the double T-board 11 during transportation. However, when the double T-board 11 is transported to the predetermined position and landed, it is inevitable to make fine adjustments so that the double T-board 11 can be aligned and spliced ​​with other building components (it should be noted that the fine adjustment is different from the above-mentioned secondary precision adjustment. The secondary precision adjustment refers to the traditional lifting method. Due to the unstable lifting, the double T-board 11 will shake during the movement process and cannot be aligned with the frame structure such as the steel bars on the building. The double T-board 11 When the double T-board 11 is not falling in the air, it is corrected by pulling with a rope, and the fine adjustment here means that when the double T-board 11 is about to land or has landed, the double T-board 11 is slightly displaced by a tool such as a crowbar to align and fit with the adjacent mechanism body. Due to its high spatial stability, fine adjustment is more difficult. At the same time, since the double T-board 11 is hoisted by a wire rope 13, it is inevitable that it will shake during the fine adjustment process. Due to the heavy weight of the double T-board 11, it is easy to cause personal injury when it is operated incorrectly by humans.

[0038] As a further solution of the present invention, the clamping mechanism includes a first mounting plate 21, and retractable threaded legs 22 are provided at both ends of the front and rear ends of the first mounting plate 21. A steering mechanism is provided below the first mounting plate 21, and the lower end of the steering mechanism is connected to a second mounting plate 23. Four connecting rods 24 that can be fixedly connected to the first lifting ring 14 are vertically arranged below the second mounting plate 23. The upper end of the first mounting plate 21 is fixedly connected to a second lifting ring 25 corresponding to the position of the first lifting ring 14, and the second lifting ring 25 is directly connected to the wire rope 13. The first mounting plate 21 is provided with a descending mechanism, and the descending mechanism is connected to the upper end of the steering mechanism. The descending mechanism is used to control the descent of the second mounting plate 23, and the steering mechanism is used to control the horizontal movement of the second mounting plate 23.

[0039] The connecting rod 24 in the clamping mechanism is fixedly connected to the first lifting ring 14, so that the clamping mechanism clamps the double T-board 11, and then the wire rope 13 of the gantry crane 12 is suspended by the second lifting ring 25 to lift the clamping mechanism, so as to further achieve the effect of eight-point lifting of the double T-board 11. When the double T-board 11 reaches above the predetermined position, the threaded legs 22 are first extended to set the clamping mechanism on the building through the threaded legs 22, and then the gantry crane 12 is relaxed, so that the weight of the double T-board 11 is supported by the clamping mechanism. Furthermore, the double T-board 11 at this time is changed from flexible rope lifting to rigid clamping mechanism lifting, and the horizontal position of the double T-board 11 is further adjusted by the steering mechanism. After the adjustment is completed, the double T-board 11 is lowered by the descending mechanism, and then the connection between the connecting rod 24 and the first lifting ring 14 is released, so that the double T-board 11 is separated from the clamping mechanism, and then the clamping mechanism is transferred by the gantry crane 12 to lift the next double T-board 11.

[0040] The present invention adds a clamping mechanism, so that during the installation process of the double T-plate 11, the flexible rope lifting is changed to the rigid clamping mechanism lifting, and further the double T-plate 11 can be more accurately adjusted in position with higher efficiency.

[0041] As a further solution of the present invention, the descending mechanism includes a screw rod 31. A transmission mechanism is arranged in the first mounting plate 21. The transmission mechanism is used to convert the gravity of the double T plate 11 into a downward extrusion force of the threaded legs 22. The screw rod 31 vertically penetrates the first mounting plate 21 and is threadedly connected to the transmission mechanism in the first mounting plate 21. The lower end of the screw rod 31 is rotatably connected to the upper end of the steering mechanism, and the upper end of the screw rod 31 is fixedly connected to a turntable 32.

[0042] After the horizontal position of the double T-board 11 is adjusted, the screw rod 31 is rotated by rotating the turntable 32, and the screw rod 31 is further moved vertically downward, so that the steering mechanism and the double T-board 11 thereunder move downward, and the double T-board 11 lands smoothly.

[0043] The present invention rotates the screw rod 31 to make the screw rod 31 move down smoothly with the double T-board 11. The process is stable, and the impact strength of the double T-board 11 falling to the ground is easier to control than the traditional hoisting landing. The double T-board 11 and the building can be effectively protected, and the construction quality is improved.

[0044] As a further solution of the present invention, the transmission mechanism includes a first hydraulic chamber 41, which is vertically opened at the center of the first mounting plate 21, and second hydraulic chambers 42 are opened at both ends of the first mounting plate 21. The upper ends of the two threaded legs 22 respectively penetrate the first mounting plate 21 and communicate with the two second hydraulic chambers 42. The threaded legs 22 are vertically slidably connected to the first mounting plate 21. A flow channel 43 is opened between the second hydraulic chamber 42 and the first hydraulic chamber 41, and a valve 44 is fixedly arranged in the flow channel 43. The valve 44 A sealing rod 45 for controlling the on and off of the valve 44 is provided in the middle. The sealing rod 45 vertically penetrates from the upper end of the first mounting plate 21 to the valve 44, and the sealing rod 45 is threadedly connected to the first mounting plate 21; a piston 46 is vertically slidably connected in the first hydraulic chamber 41, and a first slide rod 47 is vertically fixedly connected to the lower end of the piston 46. The first slide rod 47 downwardly penetrates the first mounting plate 21 and is vertically slidably connected to the first mounting plate 21, and the screw rod 31 penetrates the first slide rod 47 from the axis of the first slide rod 47 and is threadedly connected to the first slide rod 47.

[0045] Before the double T-plate 11 is installed on the clamping mechanism, the sealing rod 45 is first rotated to lock the valve 44, so that the flow channels 43 on both sides of the valve 44 are disconnected. Then, after the double T-plate 11 is installed on the clamping mechanism and hoisted, the gravity of the double T-plate 11 is transmitted to the first slide bar 47 through the screw rod 31, so that the first slide bar 47 is pulled downward by the gravity of the double T-plate 11; after the double T-plate 11 is about to be in place and the threaded legs 22 are extended to support on the building, the sealing rod 45 is rotated in the opposite direction to move the sealing rod 45 upward, so that the valve 44 is connected to the two sides. The flow channel 43, at this time, the first slide rod 47 drives the piston 46 to press down the hydraulic oil in the first hydraulic chamber 41, and the oil pressure of the hydraulic oil is further increased, and is transmitted to the second hydraulic chamber 42 through the flow channel 43, so that the oil pressure in the second hydraulic chamber 42 is increased, and further, the hydraulic oil in the second hydraulic chamber 42 squeezes the threaded leg 22 downward, so that the downward pressure of the threaded leg 22 increases, so that the weight support of the double T-plate 11 is transferred from the wire rope 13 to the threaded leg 22, and the clamping mechanism is further firmly supported on the building.

[0046] The present invention transfers the weight support of the double T-plate 11 by means of oil pressure. At the same time, since the hydraulic oil corresponding to the two threaded legs 22 is connected, the downward pressure of the threaded legs 22 is the same and uniform. Compared with the method of directly loosening the wire rope 13, the present invention is more stable and reliable, and avoids the unevenness of the two threaded legs 22, which causes the wire rope 13 to be directly loosened, resulting in unbalanced force on the two threaded legs 22 and causing the clamping mechanism to tip over.

[0047] As a further solution of the present invention, the steering mechanism includes a third mounting plate 51, which is rotatably connected to the lower end of the screw rod 31, and a second slide rod 52 is vertically fixedly connected to the upper end of the third mounting plate 51. The second slide rod 52 vertically penetrates the first mounting plate 21 and is vertically slidably connected to the first mounting plate 21. The lower end of the third mounting plate 51 is laterally slidably connected to the first slide plate 53, and the lower end of the first slide plate 53 is longitudinally slidably connected to the second slide plate 54. The lower end of the second slide plate 54 is rotatably connected to the first connecting block 55 in the horizontal direction. A second connecting block 56 is provided at the upper end of the second mounting plate 23. The first connecting block 55 and the second connecting block 56 are rotatably connected in the vertical direction. A locking mechanism is externally connected between the first connecting block 55 and the second connecting block 56, and the locking mechanism is used to lock the first connecting block 55 and the second connecting block 56.

[0048] The double T-board 11 is displaced laterally and longitudinally by sliding the first slide plate 53 and the second slide plate 54, and the double T-board 11 is displaced by rotating the first connecting block 55 and the second slide plate 54. The two cooperate with each other to make the double T-board 11 fine-tuned (fine-tuned by manually moving the second mounting plate 23. In actual operation, an auxiliary mechanism can be installed to move the second mounting plate 23). When the double T-board 11 is fine-tuned and falls, it is inevitable that the left and right ends of the double T-board 11 will rotate (the left and right ends of the double T-board 11 cannot fall synchronously). At this time, the first connecting block 55 and the second connecting block 56 can be rotated by unlocking the locking mechanism, and then the left and right ends of the double T-board 11 are avoided by the rotation between the first connecting block 55 and the second connecting block 56, so as to prevent the double T-board 11 from cracking and being damaged.

[0049] As a further solution of the present invention, the upper end of the connecting rod 24 is fixedly connected to the third slider 61, the upper end of the third slider 61 is laterally slidingly connected to the fourth slider 62, the fourth slider 62 is longitudinally slidingly connected to the lower end of the second mounting plate 23, and the third slider 61 and the fourth slider 62 are both externally connected to a second locking mechanism, and the second locking mechanism is used to lock the positions of the third slider 61 and the fourth slider 62.

[0050] The position of the connecting rod 24 is adjusted by moving the third slider 61 and the fourth slider 62, and the auxiliary connecting rod 24 is aligned and connected with the first lifting ring 14. After the connecting rod 24 is aligned and connected with the first lifting ring 14, the position of the third slider 61 and the fourth slider 62 is locked by the second locking mechanism.

[0051] As a further solution of the present invention, the lower end of the second connecting block 56 is fixedly connected to a rotating shaft 71, which passes through the second mounting plate 23 and is rotatably connected to the second mounting plate 23, and the lower end of the rotating shaft 71 is fixedly connected to a direction rod 72, and the trajectory of the direction rod 72 is parallel to the rotation direction between the first connecting block 55 and the second connecting block 56, and first through grooves 73 are vertically penetrated on both sides of the direction rod 72, and first telescopic rods 74 and second telescopic rods 75 that cross each other are respectively arranged upper and lower between the third sliding blocks 61 in the same row, and the ends of the first telescopic rod 74 and the second telescopic rod 75 are rotatably connected to the left and right ends of the two third sliding blocks 61 in the same row, and the first telescopic rod 74 vertically passes through a second through groove 76, and the upper end of the second telescopic rod 75 is vertically fixedly connected to a third sliding rod 77, and the third sliding rod 77 is slidably connected to the corresponding first through groove 73 and second through groove 76.

[0052] The third slide bar 77 on the second telescopic rod 75 is slidably connected to the second through groove 76 of the first telescopic rod 74, so that the third slide bar 77 is always located in the middle position of the third slider 61 in the same column. Furthermore, the two ends of the direction rod 72 are respectively located in the middle positions of the third sliders 61 in the same column on both sides of the direction rod 72. Further, the direction rod 72 is parallel to the median plane of the four first hanging rings 14 on the same side. Correspondingly, as long as the position accuracy of the four first hanging rings 14 is controlled during the pre-embedding process, the direction rod 72 can be made to coincide with the median plane of the double T-plate 11, and the rotation direction between the first connecting block 55 and the second connecting block 56 can be made to coincide with the median plane of the double T-plate 11, so as to avoid misalignment between the first connecting block 55 and the second connecting block 56 when the double T-plate 11 falls and rotates, resulting in strong extrusion between the first connecting block 55 and the second connecting block 56.

[0053] The hoisting process of the prefabricated large-span double T-plate hoisting device is as follows:

[0054] S1. During operation, a pre-buried first lifting ring 14 is set at a certain position away from the edge at both ends of the prefabricated large-span double T-plate 11, and eight first lifting rings 14 are buried in a single double T-plate 11;

[0055] S2. Two rail truss gantry cranes 12 are set up at the construction site, and a four-point lifting wire rope 13 is set under each gantry crane 12;

[0056] S3, start the lifting device of the gantry crane 12 at the same time, lift the double T-plate 200mm away from the mold, observe the stability of the lifting device of the gantry crane 12 and the status of the prefabricated components, and lift them synchronously for transportation after confirming that everything is normal;

[0057] S4. Two gantry cranes 12 are used to lift the double T-plate 11 in eight-point lifting mode. The lifting needs to be done synchronously. The power of the gantry cranes 12, the length of the wire rope 13, and the lifting points must be synchronized and consistent. The operators must perform lifting, walking, and placing synchronously to maintain the stability of the prefabricated components.

[0058] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A prefabricated large-span double T-plate hoisting device, comprising a double T-plate (11), characterized in that: It comprises two gantry cranes (12), each of which is equipped with a four-point lifting steel wire rope (13); First lifting rings (14), four first lifting rings (14) with rectangular end points are respectively embedded on both sides of the upper end of the double T-plate (11); Two clamping mechanisms, the two clamping mechanisms respectively fixing the double T-plate (11) via first lifting rings (14) on both sides of the double T-plate (11), the two gantry cranes (12) being capable of lifting the corresponding clamping mechanisms respectively in a four-point lifting manner via steel wire ropes (13); the clamping mechanisms being used to assist the double T-plate (11) in landing accurately; The clamping mechanism comprises a first mounting plate (21), the front and rear ends of the first mounting plate (21) are both provided with retractable threaded legs (22), a steering mechanism is provided below the first mounting plate (21), the lower end of the steering mechanism is connected to a second mounting plate (23), four connecting rods (24) are vertically provided below the second mounting plate (23) and can be fixedly connected to the first lifting ring (14), the upper end of the first mounting plate (21) is fixedly connected to a second lifting ring (25) at a position corresponding to the first lifting ring (14), the second lifting ring (25) is directly connected to the wire rope (13), the first mounting plate (21) is provided with a descending mechanism, the descending mechanism is connected to the upper end of the steering mechanism, the descending mechanism is used to control the descent of the second mounting plate (23), and the steering mechanism is used to control the horizontal movement of the second mounting plate (23).

2. The prefabricated large-span double T-plate hoisting device according to claim 1 is characterized in that: The descending mechanism comprises a screw rod (31). A transmission mechanism is arranged in the first mounting plate (21). The transmission mechanism is used to convert the gravity of the double T plate (11) into a downward squeezing force of the threaded legs (22). The screw rod (31) vertically penetrates the first mounting plate (21) and is threadedly connected to the transmission mechanism in the first mounting plate (21). The lower end of the screw rod (31) is rotatably connected to the upper end of the steering mechanism. The upper end of the screw rod (31) is fixedly connected to a turntable (32).

3. The prefabricated large-span double T-plate hoisting device according to claim 2 is characterized in that: The transmission mechanism comprises a first hydraulic chamber (41), the first hydraulic chamber (41) being vertically opened at the center of the first mounting plate (21), second hydraulic chambers (42) being opened at both ends of the first mounting plate (21), upper ends of the two threaded legs (22) respectively passing through the first mounting plate (21) and communicating with the two second hydraulic chambers (42), the threaded legs (22) being vertically slidably connected to the first mounting plate (21), a flow channel (43) being opened between the second hydraulic chamber (42) and the first hydraulic chamber (41), a valve (44) being fixedly arranged in the flow channel (43), and a valve (44) being arranged in the valve (44) for A sealing rod (45) for controlling the on / off state of the valve (44), the sealing rod (45) vertically penetrates from the upper end of the first mounting plate (21) into the valve (44), and the sealing rod (45) is threadedly connected to the first mounting plate (21); a piston (46) is vertically slidably connected in the first hydraulic chamber (41), and a first sliding rod (47) is vertically fixedly connected to the lower end of the piston (46), the first sliding rod (47) downwardly penetrates the first mounting plate (21) and is vertically slidably connected to the first mounting plate (21), and the screw rod (31) penetrates the first sliding rod (47) from the axis of the first sliding rod (47) and is threadedly connected to the first sliding rod (47).

4. The prefabricated large-span double T-plate hoisting device according to claim 3 is characterized in that: The steering mechanism comprises a third mounting plate (51), wherein the third mounting plate (51) is rotatably connected to the lower end of the screw rod (31); the upper end of the third mounting plate (51) is vertically fixedly connected to a second sliding rod (52); the second sliding rod (52) vertically penetrates the first mounting plate (21) and is vertically slidably connected to the first mounting plate (21); the lower end of the third mounting plate (51) is laterally slidably connected to a first sliding plate (53); the lower end of the first sliding plate (53) is longitudinally slidably connected to a second sliding plate (54); the lower end of the second sliding plate (54) is horizontally rotatably connected to a first connecting block (55); the upper end of the second mounting plate (23) is provided with a second connecting block (56); the first connecting block (55) and the second connecting block (56) are rotatably connected in the vertical direction; a locking mechanism is externally connected between the first connecting block (55) and the second connecting block (56); the locking mechanism is used to lock the first connecting block (55) and the second connecting block (56).

5. The prefabricated large-span double T-plate hoisting device according to claim 4 is characterized in that: The upper end of the connecting rod (24) is fixedly connected to a third slider (61), the upper end of the third slider (61) is laterally slidably connected to a fourth slider (62), the fourth slider (62) is longitudinally slidably connected to the lower end of the second mounting plate (23), the third slider (61) and the fourth slider (62) are both externally connected to a second locking mechanism, the second locking mechanism being used to lock the positions of the third slider (61) and the fourth slider (62).

6. The prefabricated large-span double T-plate hoisting device according to claim 5 is characterized in that: The lower end of the second connecting block (56) is fixedly connected to a rotating shaft (71), the rotating shaft (71) passes through the second mounting plate (23) and is rotatably connected to the second mounting plate (23), the lower end of the rotating shaft (71) is fixedly connected to a direction rod (72), the trajectory of the direction rod (72) is parallel to the rotation direction between the first connecting block (55) and the second connecting block (56), both sides of the direction rod (72) are vertically penetrated with a first through slot (73), the third sliding blocks (61) in the same row are respectively provided with a first telescopic rod (74) and a second telescopic rod (75) intersecting each other, the ends of the first telescopic rod (74) and the second telescopic rod (75) are respectively rotatably connected to the left and right ends of the two third sliding blocks (61) in the same row, the first telescopic rod (74) is vertically penetrated with a second through slot (76), the upper end of the second telescopic rod (75) is vertically fixedly connected to a third sliding rod (77), the third sliding rod (77) is slidably connected to the corresponding first through slot (73) and the second through slot (76).

7. The hoisting process of the prefabricated large-span double T-plate hoisting device according to claim 6 is characterized in that: The process is as follows: S1, during operation, pre-embedded first lifting rings (14) are arranged at a certain position away from the edge at both ends of the prefabricated large-span double T-plate (11), and eight first lifting rings (14) are embedded in a single double T-plate (11); S2. Two rail truss gantry cranes (12) are set up at the construction site, and a four-point lifting wire rope (13) is set under each gantry crane (12); S3, simultaneously start the lifting device of the gantry crane (12), lift the double T-plate 200 mm away from the mold, observe the stability of the lifting device of the gantry crane (12) and the status of the prefabricated components, and after confirming that everything is normal, lift them synchronously for transportation; S4. Two gantry cranes (12) are used to lift the double T-plate (11) in an eight-point lifting mode. The lifting must be carried out synchronously. The power of the gantry cranes (12) and the length and lifting points of the wire ropes (13) must be synchronized and consistent. The operators must perform lifting, walking and placing synchronously to maintain the stability of the prefabricated components.

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