Lifting device for constructional engineering

Abstract

The invention discloses a lifting device for constructional engineering, and relates to the technical field of lifting devices, the lifting device comprises a base, a detachable assembly base is fixed on the outer side wall of the base, and an adjustable balance weight driven by a first coil taking machine to slide is arranged at the top end of the detachable assembly base in a sliding manner; a building material to be hoisted is borne through the material bearing plate connected to the lower portion of the control box in a hoisting mode, the levelness of the material bearing plate is adjusted through the automatic leveling mechanism in the hoisting process, and therefore the falling risk caused by gravity center shifting of the building material in the hoisting process can be effectively avoided; and the building materials on the material bearing plate are subjected to weight metering through the tension meter, and the adjustable counterweight block is driven by the first coil taking machine to transversely slide left and right on the detachable and assembled base according to the metering result, so that the balance effect is amplified by utilizing the lever principle, and the stability of the lifting device is kept.

Description

Technical Field

[0001] The present invention relates to the technical field of lifting devices, and in particular to a lifting device for construction projects. Background Art

[0002] Lifting machinery, also known as lifting equipment, refers to multi-action lifting machinery that can lift and carry heavy objects within a certain range. The working characteristic of lifting equipment is intermittent movement, that is, in a working cycle, the corresponding mechanisms for actions such as material taking, transporting, and unloading work alternately. Lifting equipment is an important tool and equipment in industrial, transportation, and construction enterprises to realize the mechanization and automation of the production process, reduce heavy manual labor, and improve labor productivity. In our country, there are a large number of various types of lifting equipment, and the application of lifting equipment in construction projects is particularly extensive.

[0003] Construction engineering refers to the planning, surveying, design, construction, completion, and other technical works carried out for the new construction, renovation, or expansion of buildings and ancillary structures, as well as the completed engineering entities and the installation works of the pipelines and equipment supporting them. It also refers to the construction projects of various houses and buildings. Currently, in the indoor environment construction of construction projects, for some building materials with large volume and weight that cannot be transported by elevator or stairs, it is usually necessary to rely on corresponding lifting equipment to hoist the building materials to the indoor construction site.

[0004] Based on the prior art, it is found that the existing lifting devices for construction projects have a single function. During the hoisting process of building materials, they do not have the function of automatically adjusting the level of the hoisted materials. Moreover, the building materials are prone to center of gravity deviation and even falling due to shaking during the hoisting process, resulting in low safety. In addition, most of the existing lifting devices use fixed counterweights and need to preset the counterweight corresponding to the maximum load, that is, the counterweight blocks need to be as heavy as possible, which makes the overall device relatively bulky. At the same time, it is also a waste for lifting work with small weights and inconvenient to use. Therefore, the present invention proposes a lifting device for construction projects to solve the problems existing in the prior art. Summary of the Invention

[0005] Aiming at the above problems, the purpose of the present invention is to propose a lifting device for construction projects, which solves the problems that the existing lifting devices for construction projects do not have the function of automatically adjusting the level of the hoisted materials, and most of them use fixed counterweights and need to preset the counterweight corresponding to the maximum load, resulting in the overall device being relatively bulky.

[0006] To achieve the object of the present invention, the present invention is realized by the following technical solutions: A lifting device for construction engineering, comprising a base, on the outer side wall of the base is fixedly provided a detachable and assembled base, on the top end of the detachable and assembled base is slidably provided an adjustable counterweight block driven to slide by a first rewinding machine, on the top end of the base is fixedly provided a fixed column, inside the fixed column is slidably provided a movable column driven to lift by a manual adjustment mechanism, on the top end of the movable column is fixedly provided a driving box, above the driving box is rotatably connected a support column driven to rotate by a rotating motor, on the support column is fixedly provided a support plate, on the support column and the support plate is jointly fixedly provided a boom, on the top end of the support plate is fixedly provided a second rewinding machine, at one end of the boom away from the support plate is fixedly provided a support pulley, on the take-up reel at the output end of the second rewinding machine is wound a lifting rope, one end of the lifting rope away from the second rewinding machine passes through the support pulley and is suspended with a control box by a tensiometer, the tensiometer is electrically connected with the first rewinding machine, and below the control box is suspended a material bearing plate whose levelness is adjusted by an automatic leveling mechanism.

[0007] The further improvement lies in that: The automatic leveling mechanism comprises wire winding wheels located on the four sides inside the control box and driven to rotate by servo motors and suspension cables wound on the wire winding wheels, the four corner positions of the material bearing plate are respectively fixedly connected with the suspension cables, and inside the bottom end of the material bearing plate is fitted and installed a level measuring instrument electrically connected with the servo motor.

[0008] The further improvement lies in that: Symmetrically fixed at the bottom end of the material bearing plate are support cones, symmetrically fixed at the top end of the material bearing plate are strap fixing rings, on the four side walls of the control box are all provided wire outlet openings, and inside the wire outlet openings are rotatably connected first guiding pulleys adapted to the suspension cables.

[0009] The further improvement lies in that: Fixed at the bottom end of the control box is an anemometer, on one side of the bottom end of the support plate away from the support column is fixedly provided a danger warning light, one end of the lifting rope away from the second rewinding machine is fixedly provided with a first hanging plate, fixed at the top end of the control box is a second hanging plate, the tensiometer is fixed between the first hanging plate and the second hanging plate, both the tensiometer and the anemometer are electrically connected with the danger warning light, and fixed on the front surface of the driving box is a control panel.

[0010] The further improvement lies in that: Fixed on one side of the support column away from the second rewinding machine is an inclined reinforcing rod, between the inclined reinforcing rod and the boom is fixedly provided a reinforcing connecting plate, and at equal intervals on one side of the boom away from the inclined reinforcing rod are fixedly provided second guiding pulleys adapted to the lifting rope.

[0011] A further improvement lies in that: a connection plate is fixed to the bottom end of the support column, a support shaft is fixed to the bottom end of the connection plate, the output end of the rotary motor passes through the inside of the drive box through a bearing and is fixed with a first bevel gear, and the lower part of the support shaft passes through the inside of the drive box through a bearing and is fixedly sleeved with a second bevel gear meshing with the first bevel gear.

[0012] A further improvement lies in that: the manual adjustment mechanism includes a rotating handle located outside the fixed column and a rotating shaft rotatably connected inside the fixed column. One end of the rotating shaft close to the rotating handle passes through the outside of the fixed column through a bearing and is fixedly connected to the rotating handle. A driving gear is fixedly sleeved on the rotating shaft, a rack meshing with the driving gear is fixed to the inner side wall of the movable column, through grooves adapted to the rotating shaft are formed in the front and rear side walls of the movable column, and the rotating handle and the fixed column are fixedly positioned through a positioning mechanism.

[0013] A further improvement lies in that: the positioning mechanism includes a threaded rod threadedly penetrating through the rotating handle and a knob fixed to the side of the threaded rod away from the fixed column. One end of the threaded rod away from the knob is designed as a tapered tip, and tapered holes adapted to the tip of the threaded rod are formed in the outer wall of the fixed column and are distributed at equal intervals in a ring shape.

[0014] A further improvement lies in that: two groups of the first coil take-up machines are provided and are respectively fixed to both sides of the top end of the detachable assembly base. A traction rope is wound around the take-up wheel at the output end of the first coil take-up machine. Traction rings fixedly connected to the traction rope are fixed to both outer side walls of the adjustable counterweight block. T-shaped slide rails are symmetrically fixed to the top end of the detachable assembly base, and T-shaped slide seats adapted to the T-shaped slide rails are symmetrically fixed to the bottom end of the adjustable counterweight block.

[0015] A further improvement lies in that: the detachable assembly base is composed of several groups of bottom plates spliced in sequence. Insertion columns are symmetrically fixed to one side of the bottom plate close to the base. Insertion holes adapted to the insertion columns are formed on one side of the base close to the bottom plate and on one side of the bottom plate away from the base. Adjacent bottom plates are butt-jointed and fixed through a locking splicing mechanism.

[0016] A further improvement lies in that: the locking splicing structure includes first semi-circular threaded columns and second semi-circular threaded columns symmetrically distributed on the front and rear outer side walls of the bottom plate. A threaded ring is commonly threadedly sleeved on the mutually butted first semi-circular threaded column and second semi-circular threaded column.

[0017] The beneficial effects of the present invention are as follows: The present invention uses a material bearing plate suspended below the control box to carry the building materials to be lifted and hoisted, and during the hoisting process, an automatic leveling mechanism is used to adjust the level of the material bearing plate, thereby effectively avoiding the risk of dropping caused by the center of gravity deviation of the building materials during hoisting, and thus improving the hoisting safety. Moreover, a tensiometer is used to measure the weight of the building materials on the material bearing plate, and according to the measurement result, the first coil take-up machine is used to drive the adjustable counterweight block to slide horizontally left and right on the detachable and assembled base, thereby using the lever principle to amplify the balancing effect and maintain the stability of the hoisting device. Compared with the traditional fixed counterweight, even if only the minimum necessary counterweight blocks are configured, the stable balance of the device can be achieved, avoiding the problem of the overall device being relatively bulky. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is the front view in the first embodiment of the present invention; Figure 2 is the front cross-sectional view of the fixed column and the movable column in the first embodiment of the present invention; Figure 3 is the cross-sectional view of the control box and the material bearing plate in the first embodiment of the present invention; Figure 4 is the top cross-sectional view of the control box in the first embodiment of the present invention; Figure 5 is the side view of the bottom plate in the first embodiment of the present invention; Figure 6 is the side cross-sectional view of the fixed column in the first embodiment of the present invention; Figure 7 is the three-dimensional structural schematic diagram of the bottom plate in the first embodiment of the present invention; Figure 8 is the schematic diagram of adjacent bottom plates spliced in the second embodiment of the present invention; Figure 9 is the cross-sectional view of the mounting seat and the mounting block in the second embodiment of the present invention.

[0019] Wherein: 1. Base; 2. Demountable and assembled base; 3. First coil taking machine; 4. Adjustable counterweight; 5. Fixed column; 6. Movable column; 7. Driving box; 8. Rotating motor; 9. Support column; 10. Support plate; 11. Lifting arm; 12. Second coil taking machine; 13. Support pulley; 14. Lifting rope; 15. Tensile meter; 16. Control box; 17. Material load-bearing plate; 18. Servo motor; 19. Winding wheel; 20. Suspension cable; 21. Level gauge; 22. Support cone; 23. Band fixing ring; 24. Wire outlet; 25. First guiding pulley; 26. Anemometer; 27. Danger warning light; 28. First hanging plate; 29. Second hanging plate; 30. Oblique reinforcing rod; 31. Reinforcing connecting plate; 32. Second guiding pulley; 33. Connecting plate; 34. Support shaft; 35. First bevel gear; 36. Second bevel gear; 37. Rotating handle; 38. Rotating shaft; 39. Driving gear; 40. Rack; 41. Threaded rod; 42. Knob; 43. Tapered hole; 44. Towing rope; 45. Towing ring; 46. T-shaped slide rail; 47. T-shaped slide block; 201. Bottom plate; 202. Inserting column; 203. Inserting hole; 204. First semi-circular threaded column; 205. Second semi-circular threaded column; 206. Threaded ring; 207. Mounting block; 208. Mounting seat; 209. Inserting plate; 210. Pin; 211. Flap; 212. Limit spring. Detailed implementation mode

[0020] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0021] Construction engineering refers to a series of systematic activities that transform various buildings or infrastructure from blueprints into entities through scientific planning, design, construction, and management. It covers the construction, renovation, and maintenance of various civil engineering projects such as houses, bridges, roads, tunnels, and water conservancy facilities, involving the coordination of multiple fields such as building structures, material applications, process technologies, safety codes, and environmental protection. The main bodies of construction engineering include construction units, design units, construction units, supervision units, etc. Through resource allocation, technology implementation, and quality management, the unity of functionality and safety is achieved. As a basic industry for social and economic development, construction engineering not only meets the people's livelihood needs such as housing and transportation but also is an important force in promoting urbanization and industrial upgrading; The lifting device for construction projects refers to special mechanical equipment used for vertical or horizontal lifting and installation of building materials, components and equipment during the construction process. Its core function is to achieve precise positioning and efficient handling of heavy objects through mechanical power, and it is an essential key equipment for modern construction. Common lifting devices include tower cranes, truck cranes, crawler cranes, construction elevators, gantry cranes and winches, etc., which are widely used in steel bar binding, concrete pouring, steel structure installation, precast component hoisting and other links; With the development of science and technology and production, lifting equipment is constantly being improved and developed. Advanced electrical, optical and computer technologies are applied to lifting equipment, and its trend is to increase the degree of automation, improve work efficiency and performance, and make the operation simpler, more labor-saving and safer and more reliable.

[0022] Example 1, according to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 As shown, this embodiment provides a lifting device for construction projects, including a base 1 as the overall support component of the device and a detachable and assembled base 2 located on the right side of the base 1 and fixedly connected to the right side wall of the base 1 by bolts. The detachable and assembled base 2 has the function of disassembly and assembly, can adapt to different use scenarios. On both the left and right sides of the top of the detachable and assembled base 2, a first take-up machine 3 is fixedly installed by bolts. A adjustable counterweight 4 is slidably arranged at the middle position of the top of the detachable and assembled base 2, and the adjustable counterweight 4 is driven by two groups of first take-up machines 3 and slides left or right on the detachable and assembled base 2. A fixed column 5 with an open top is welded and fixed at the center position of the top of the base 1. An active column 6 is slidably arranged inside the fixed column 5, and the active column 6 is driven by a manual adjustment mechanism and slides up and down inside the fixed column 5. Through the lifting adjustment of the active column 6, the lifting device can make adaptive height adjustment within a certain range; A hollow drive box 7 is welded and fixed to the top of the movable column 6. A controller is fixed to the front of the drive box 7, and the PLC control system of the device is installed inside the controller. A rotary motor 8 is fixed to the outer wall on the right side of the drive box 7 through bolts. A support column 9 is rotatably connected above the drive box 7, and the support column 9 is driven to rotate by the rotary motor 8. A support plate 10 is welded and fixed to the outer wall of the support column 9, and a second coil take-up machine 12 is fixed to the support plate 10 through bolts. An inclined lifting arm 11 is welded and fixed to the support column 9 and the support plate 10 together. A support pulley 13 is fixed to the far left end of the lifting arm 11 through bolts. A lifting rope 14 is wound around the take-up wheel at the output end of the second coil take-up machine 12. One end of the lifting rope 14 away from the second coil take-up machine 12 passes through the support pulley 13 and is connected to a control box 16 through a dynamometer 15. The lifting weight can be monitored through the dynamometer 15. The dynamometer 15 is connected to the PLC control system of the device and is used to start the first coil take-up machine 3 to drive the adjustable counterweight 4 to slide horizontally to the right when the monitored lifting weight is too heavy, and use the lever principle to amplify the balancing effect and maintain the stability of the lifting device. Even if only the minimum necessary counterweight blocks are configured, the stable balance of the device can be achieved; A material bearing plate 17 for carrying the building materials to be lifted is suspended below the control box 16, and the material bearing plate 17 automatically adjusts the level through an automatic leveling mechanism. The automatic leveling mechanism includes a servo motor 18, a winding wheel 19 and a suspension cable 20. Four groups of servo motors 18 are provided and are respectively fixed to the inner walls on the four sides of the control box 16 through bolts. Four groups of winding wheels 19 are provided and are respectively fixed to the output ends of the four groups of servo motors 18. Four groups of suspension cables 20 are provided and are respectively wound around the four groups of winding wheels 19. One ends of the four groups of suspension cables 20 away from the winding wheels 19 are respectively fixed to the four corners of the material bearing plate 17. The corresponding corner of the material bearing plate 17 is lifted through the winding action of the suspension cable 20 to realize the horizontal inclination adjustment of the material bearing plate 17. A fitting groove is opened at the bottom end of the material bearing plate 17, and a level gauge 21 is fitted and installed in the fitting groove. The level gauge 21 is connected to the PLC control system of the device and is used to start the corresponding servo motor 18 to drive the winding wheel 19 at its output end to wind or unwind the suspension cable 20 when it is monitored that the material bearing plate 17 is skewed and uneven. If it is monitored that the material bearing plate 17 is skewed with the front high and the rear low, the rear suspension cable 20 is driven to wind (resulting in the rear side of the material bearing plate 17 being lifted) and the front suspension cable 20 is driven to unwind (resulting in the front side of the material bearing plate 17 being lowered) to realize the horizontal adjustment of the material bearing plate 17 by the automatic leveling mechanism. The building materials to be lifted are carried by the material bearing plate 17 suspended below the control box 16, and the level of the material bearing plate 17 is adjusted by the automatic leveling mechanism during the lifting process, so as to effectively avoid the risk of falling caused by the center of gravity of the building materials shifting during the lifting process.

[0023] Four groups of symmetrically distributed support cones 22 are fixed to the bottom end of the material bearing plate 17 to support the material bearing plate 17. Four groups of symmetrically distributed strap fixing rings 23 are fixed to the top end of the material bearing plate 17 for tying straps. The straps are used to appropriately limit the building materials on the material bearing plate 17. Outlet openings 24 for the sling 20 to pass through are formed on the four side walls of the control box 16. A first guiding pulley 25 is rotatably connected to the inner side of the outlet opening 24, and the first guiding pulley 25 is adapted to the sling 20. The sling 20 passes through the control box 16 after passing through the first guiding pulley 25.

[0024] An anemometer 26 for measuring the high-altitude wind speed is fixed to the bottom end of the control box 16 by bolts. A danger warning light 27 is fixed to the right side of the bottom end of the support plate 10 by bolts. One end of the lifting sling 14 away from the second rewinder 12 is fixed to a first lifting plate 28 by bolts. A second lifting plate 29 is fixed to the top end of the control box 16 by bolts. The tensiometer 15 is fixed between the first lifting plate 28 and the second lifting plate 29 by bolts. The first lifting plate 28 is fixed to the detection end of the tensiometer 15. Both the tensiometer 15 and the anemometer 26 are connected to the PLC control system of the device, and are used to start the flashing of the danger warning light 27 to notify the staff to stop the lifting operation to avoid danger when it is detected that the weight of the building materials is too large or the high-altitude wind speed is too large.

[0025] An inclined reinforcing rod 30 is welded and fixed to the outer wall of the left side of the support column 9. A reinforcing connecting plate 31 is fixed between the inclined reinforcing rod 30 and the boom 11 by bolts to provide auxiliary support for the boom 11 and make its overall structure more stable. A plurality of second guiding pulleys 32 are fixed to the side of the boom 11 away from the inclined reinforcing rod 30 by bolts at equal intervals. The second guiding pulleys 32 are adapted to the lifting sling 14. The lifting sling 14 passes through each second guiding pulley 32 and then through the support pulley 13.

[0026] A connecting disc 33 is fixed to the bottom end of the support column 9 by bolts. A support shaft 34 is fixed to the bottom end of the connecting disc 33 by bolts. The output end of the rotating motor 8 passes through the bearing to the inside of the driving box 7 and is fixed with a first bevel gear 35. The lower part of the support shaft 34 passes through the bearing to the inside of the driving box 7 and is fixedly sleeved with a second bevel gear 36. The second bevel gear 36 is meshed and adapted to the first bevel gear 35. The first bevel gear 35 is driven by the rotating motor 8 to drive the engaged second bevel gear 36 to rotate. The second bevel gear 36 drives the support shaft 34 to rotate, and the support shaft 34 drives the support column 9 to rotate through the connecting disc 33.

[0027] The manual adjustment mechanism includes a rotating handle 37 and a rotating shaft 38. The rotating handle 37 is located outside the fixed column 5. The rotating shaft 38 is rotatably connected to the inside of the fixed column 5 through a bearing. One end of the rotating shaft 38 close to the rotating handle 37 penetrates through the outside of the fixed column 5 through a bearing and is fixedly connected to the rotating handle 37 through a bolt. A driving gear 39 is fixedly sleeved on the rotating shaft 38. A rack 40 is fixed on the inner side wall of the movable column 6. The rack 40 meshes with the driving gear 39. Through grooves adapted to the rotating shaft 38 are formed on the front and rear side walls of the movable column 6, so that the movable column 6 will not contact the rotating shaft 38 during displacement. The rotating handle 37 and the fixed column 5 are fixedly positioned through a positioning mechanism, which is convenient for obtaining fixed limit after the rotating handle 37 is rotated and adjusted. The user drives the rotating shaft 38 to drive the driving gear 39 to rotate by rotating the rotating handle 37. During the rotation of the driving gear 39, the rack 40 engaged with it is driven to lift and displace. During the lifting and displacement of the rack 40, the movable column 6 is driven to lift and displace synchronously (this operation is carried out before the support column 9 is installed above the driving box 7 to avoid difficult operation due to excessive weight).

[0028] The positioning mechanism includes a threaded rod 41 and a knob 42. The threaded rod 41 threadedly penetrates through the rotating handle 37 and the end thereof close to the fixed column 5 is designed as a sharp cone. The knob 42 is fixedly bolted to the end of the threaded rod 41 away from the fixed column 5. Sharp cone holes 43 are formed on the outer wall of the fixed column 5 and are distributed at equal intervals in a ring shape. The sharp cone holes 43 are adapted to the tip of the threaded rod 41. By rotating the knob 42 to drive the threaded rod 41 to rotate until its tip is inserted into the sharp cone hole 43, the positioning and fixing of the rotating handle 37 are realized.

[0029] A traction rope 44 is wound around the take-up reel at the output end of the first take-up machine 3. Traction rings 45 are fixedly welded to the outer walls on the left and right sides of the adjustable counterweight 4. The two traction rings 45 are respectively fixedly connected to the two traction ropes 44. Two T-shaped slide rails 46 distributed symmetrically front and rear are fixedly bolted to the top end of the detachable and assembled base 2. Two T-shaped slide seats 47 distributed symmetrically front and rear are fixed to the bottom end of the adjustable counterweight 4. The T-shaped slide seats 47 are adapted to the T-shaped slide rails 46, realizing the sliding connection of the adjustable counterweight 4 on the top end of the detachable and assembled base 2. When the tensiometer 15 monitors the weight of the building materials on the material bearing plate 17, an electrical signal for starting the first take-up machine 3 is sent to the PLC control system of the device. After receiving the start signal sent by the PLC control system, the first take-up machine 3 drives the adjustable counterweight 4 to perform corresponding sliding adjustment. The two first take-up machines 3 are controlled by the same control system. One of the first take-up machines 3 winds the traction rope 44, while the other first take-up machine 3 unwinds the traction rope 44. The adjustable counterweight 4 is pulled and driven to slide by one winding and one unwinding. During the whole adjustment process, the two traction ropes 44 are in a taut state to prevent the adjustable counterweight 4 from automatically displacing.

[0030] The detachable and assembled base 2 of this embodiment is composed of four groups of bottom plates 201 spliced in sequence. The number of bottom plates 201 can be adjusted according to actual usage requirements. Two groups of insertion posts 202 distributed symmetrically front and back are fixed on the left outer wall of each group of bottom plates 201. Insertion holes 203 are provided on the right outer wall of the base 1 and the right outer wall of the bottom plates 201, and the insertion holes 203 are adapted to the insertion posts 202. Adjacent bottom plates 201 are butt-jointed and fixed through a locking and splicing mechanism. When the bottom plates 201 are spliced, the insertion posts 202 are inserted into the corresponding insertion holes 203 to ensure the accuracy of the butt-joint of each bottom plate 201. After docking, it is fixed through the locking and splicing mechanism, thus forming a complete detachable and assembled base 2.

[0031] The locking and splicing structure includes a first semi-circular threaded column 204 and a second semi-circular threaded column 205. The first semi-circular threaded column 204 is fixed to the left side of the front and back outer walls of the bottom plate 201, and the second semi-circular threaded column 205 is fixed to the right side of the front and back outer walls of the bottom plate 201. A threaded ring 206 is commonly threadedly sleeved on the mutually butted first semi-circular threaded column 204 and second semi-circular threaded column 205. By screwing the threaded ring 206 onto the mutually butted first semi-circular threaded column 204 and second semi-circular threaded column 205, the butt-joint fixation of adjacent bottom plates 201 is realized.

[0032] Embodiment Two, see Figure 8 、 Figure 9 , this embodiment provides a lifting device for construction engineering. The difference from Embodiment One is that: the locking and splicing structure includes a mounting block 207 and a mounting seat 208. The mounting block 207 is fixed to the left side of the front and back outer walls of the bottom plate 201, and the mounting seat 208 is fixed to the right side of the front and back outer walls of the bottom plate 201. An insertion plate 209 is welded and fixed to the left outer wall of the mounting block 207. When adjacent bottom plates 201 are butted, the insertion plate 209 slides through to the inside of the mounting seat 208. A pin 210 slides through the mounting seat 208. A through hole adapted to the pin 210 is provided on the insertion plate 209. By inserting the pin 210 into the through hole of the insertion plate 209, the fixed positioning between the mounting block 207 and the mounting seat 208 is realized, that is, the positioning and fixation between adjacent bottom plates 201. A retaining piece 211 is fixedly sleeved on one side of the pin 210 located inside the mounting seat 208. A limiting spring 212 is connected between the retaining piece 211 and the top end inside the mounting seat 208, and the limiting spring 212 is movably sleeved outside the pin 210. The limiting spring 212 provides a downward elastic ejecting force for the retaining piece 211, so that the pin 210 always ejects downward.

[0033] When the lifting device for construction projects is actually in use, the movable column 6 is driven by a manual adjustment mechanism to slide inside the fixed column 5 and adjusted to an appropriate position in advance to meet the usage requirements during the actual lifting and hoisting process. Then, the boom 11 together with the support column 9 is installed above the drive box 7 through the connecting plate 33, thus completing the preliminary assembly of the lifting device. Next, the device is placed on the high floor of the building, and the detachable assembled base 2 and the base 1 are fixedly connected by bolts. At this time, one side of the boom 11 away from the support column 9 extends out of the building, and the material bearing plate 17 below it is in a suspended state.

[0034] When it is necessary to lift the building materials on the ground to the floor where the lifting device is located, start the second rewinder 12 to drive the take-up reel at its output end to unwind the lifting rope 14. During the unwinding process, the material bearing plate 17 continuously descends until it reaches the ground. Then, construction workers carry the building materials to be lifted onto the material bearing plate 17. Next, start the second rewinder 12 to drive the take-up reel at its output end to wind up the lifting rope 14. During the winding process, the material bearing plate 17 is driven to rise. When the material bearing plate 17 drives the building materials to leave the ground, use the tensiometer 15 to measure the downward pulling force generated by the building materials (i.e., the self-weight of the building materials) and send it to the PLC control system of the device. At the same time, the first rewinder 3 drives the adjustable counterweight 4 to slide horizontally left and right on the detachable assembled base 2 according to the measured weight of the building materials. The heavier the building materials, the farther the adjustable counterweight 4 is from the base 1 (using the lever principle to amplify the balancing effect, so that the device can achieve stable balance even if only the minimum necessary counterweight blocks are configured), keeping the base 1 stable.

[0035] During the process of the material bearing plate 17 driving the building materials to rise, use the level gauge 21 to continuously monitor the levelness of the material bearing plate 17 (if the material bearing plate 17 is not level, it indicates that the center of the building materials has shifted and there is a risk of tipping) and send it to the PLC control system of the device. At the same time, each servo motor 18 drives the corresponding winding wheel 19 to wind up or unwind each suspension cable 20 to tilt each corner of the material bearing plate 17 by pulling the suspension cable 20 until the level gauge 21 monitors that the material bearing plate 17 is in a horizontal state.

[0036] Then continue to start the second rewinder 12 to drive the take-up reel at its output end to unwind the lifting rope 14 until the material bearing plate 17 is lifted to the same height as the lifting device. Finally, use the rotating motor 8 to drive the support column 9 to drive the boom 11 to rotate, so as to drive the material bearing plate 17 to rotate into the building, thus completing the high-altitude lifting and hoisting operation of the building materials.

[0037] The basic principles, main features and advantages of the present invention have been shown and described above. Those skilled in the art should understand that the present invention is not limited by the above embodiments, and what is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A lifting device for construction engineering, comprising a base (1), characterized in that: A detachable assembled base (2) is fixed to the outer side wall of the base (1). A deployable counterweight (4) driven to slide by a first take-up machine (3) is slidably arranged at the top end of the detachable assembled base (2). A fixed column (5) is fixed to the top end of the base (1). An active column (6) driven to lift by a manual adjustment mechanism is slidably arranged inside the fixed column (5). A drive box (7) is fixed to the top end of the active column (6). A support column (9) driven to rotate by a rotary motor (8) is rotatably connected above the drive box (7). A support plate (10) is fixed to the support column (9). A lifting arm (11) is jointly fixed to the support column (9) and the support plate (10). A second take-up machine (12) is fixed to the top end of the support plate (10). A support pulley (13) is fixed to one end of the lifting arm (11) away from the support plate (10). A lifting sling (14) is wound around the take-up wheel at the output end of the second take-up machine (12). One end of the lifting sling (14) away from the second take-up machine (12) passes through the support pulley (13) and is connected to a control box (16) through a tensiometer (15). The tensiometer (15) is electrically connected to the first take-up machine (3). A material bearing plate (17) whose levelness is adjusted by an automatic leveling mechanism is suspended below the control box (16).

2. The lifting device for construction engineering according to claim 1, characterized in that: The automatic leveling mechanism includes winding wheels (19) located on the four sides inside the control box (16) and driven to rotate by servo motors (18) and suspension cables (20) wound around the winding wheels (19). The four corner positions of the material bearing plate (17) are respectively fixedly connected to the suspension cables (20). A level gauge (21) electrically connected to the servo motor (18) is fitted and installed at the bottom end of the material bearing plate (17).

3. The lifting device for construction engineering according to claim 2, characterized in that: Support cones (22) are symmetrically fixed to the bottom end of the material bearing plate (17). Strapping fixing rings (23) are symmetrically fixed to the top end of the material bearing plate (17). Wire outlet openings (24) are formed in the four side walls of the control box (16). First guiding pulleys (25) adapted to the suspension cables (20) are rotatably connected inside the wire outlet openings (24).

4. A lifting device for construction engineering according to claim 1, characterized in that: An anemometer (26) is fixed to the bottom end of the control box (16). A danger warning light (27) is fixed to one side of the bottom end of the support plate (10) away from the support column (9). A first hanging plate (28) is fixed to one end of the lifting sling (14) away from the second take-up machine (12). A second hanging plate (29) is fixed to the top end of the control box (16). The tensiometer (15) is fixed between the first hanging plate (28) and the second hanging plate (29). Both the tensiometer (15) and the anemometer (26) are electrically connected to the danger warning light (27). A control panel is fixed to the front of the drive box (7).

5. The lifting device for construction engineering according to claim 1, characterized in that: An inclined strengthening rod (30) is fixed to one side of the support column (9) away from the second take-up machine (12). A reinforcing connecting plate (31) is fixed between the inclined strengthening rod (30) and the lifting arm (11). Second guiding pulleys (32) adapted to the lifting sling (14) are equidistantly fixed to one side of the lifting arm (11) away from the inclined strengthening rod (30).

6. The hoisting device for construction engineering according to claim 1, characterized in that: A connecting plate (33) is fixed to the bottom end of the support column (9), a support shaft (34) is fixed to the bottom end of the connecting plate (33), the output end of the rotary motor (8) passes through the inside of the drive box (7) through a bearing and is fixed with a first bevel gear (35), and the lower part of the support shaft (34) passes through the inside of the drive box (7) through a bearing and is fixedly sleeved with a second bevel gear (36) meshing with the first bevel gear (35).

7. A lifting device for construction engineering according to claim 1, characterized in that: The manual adjustment mechanism includes a rotating handle (37) located outside the fixed column (5) and a rotating shaft (38) rotatably connected to the inside of the fixed column (5). One end of the rotating shaft (38) close to the rotating handle (37) passes through the outside of the fixed column (5) through a bearing and is fixedly connected to the rotating handle (37). A driving gear (39) is fixedly sleeved on the rotating shaft (38), a rack (40) meshing with the driving gear (39) is fixed to the inner side wall of the movable column (6), through grooves adapted to the rotating shaft (38) are formed in the front and rear side walls of the movable column (6), and the rotating handle (37) and the fixed column (5) are fixed and positioned through a positioning mechanism.

8. A lifting device for construction engineering according to claim 7, characterized in that: The positioning mechanism includes a threaded rod (41) threaded through the rotating handle (37) and a knob (42) fixed to the side of the threaded rod (41) away from the fixed column (5). One end of the threaded rod (41) away from the knob (42) is designed as a tapered tip, and tapered holes (43) adapted to the tip of the threaded rod (41) are formed in the outer wall of the fixed column (5) and are distributed at equal intervals in a ring shape.

9. The lifting device for construction engineering according to claim 1, wherein: Two groups of the first rewinding machines (3) are provided and are respectively fixed to both sides of the top end of the detachable assembly base (2). A traction rope (44) is wound around the take-up wheel at the output end of the first rewinding machine (3). Traction rings (45) fixedly connected to the traction rope (44) are fixed to both outer side walls of the adjustable counterweight (4). T-shaped slide rails (46) are symmetrically fixed to the top end of the detachable assembly base (2), and T-shaped slide seats (47) adapted to the T-shaped slide rails (46) are symmetrically fixed to the bottom end of the adjustable counterweight (4).

10. The lifting device for construction engineering according to claim 1, characterized in that: The detachable assembly base (2) is composed of several groups of bottom plates (201) spliced in sequence. Plug posts (202) are symmetrically fixed to one side of the bottom plate (201) close to the base (1). Plug holes (203) adapted to the plug posts (202) are formed in one side of the base (1) close to the bottom plate (201) and one side of the bottom plate (201) away from the base (1). Adjacent bottom plates (201) are butt-jointed and fixed through a locking splicing mechanism.

11. A lifting device for construction engineering according to claim 10, characterized in that: The locking splicing mechanism includes first semi-circular threaded posts (204) and second semi-circular threaded posts (205) symmetrically distributed on the front and rear outer side walls of the bottom plate (201) in a left-right symmetry manner. A threaded ring (206) is commonly threaded on the mutually butted first semi-circular threaded posts (204) and second semi-circular threaded posts (205).

Images