Lifting device for constructional engineering

Abstract

The invention relates to the technical field of constructional engineering, in particular to a lifting device for constructional engineering. The lifting device for constructional engineering comprises a bottom plate, sliding rods which are evenly distributed are fixedly connected to the bottom plate, an indoor lifting machine is slidably connected between the two sliding rods, a first guide wheel is rotatably connected to the top of the indoor lifting machine, and a motor is installed on the indoor lifting machine; the side, close to the motor, of the indoor elevator is rotationally connected with a first rope winding wheel, an output shaft of the motor is connected with the first rope winding wheel through a coupler, a first pull rope is wound on the first rope winding wheel, the side, close to the first guide wheel, of the indoor elevator is fixedly connected with symmetrically-distributed L-shaped mounting frames, and the symmetrically-distributed L-shaped mounting frames are oppositely arranged. Through mutual cooperation of the second guide wheels, the connecting pieces, the first springs and the like, the container can stably move upwards in the lifting process, the situation that materials in the container are collided and damaged due to shaking is avoided, and the stability and safety of lifting are improved.

Description

Technical Field

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

[0002] Construction engineering covers the construction of housing buildings and their related ancillary facilities, including the installation of lines, pipelines, equipment, etc. It involves the construction, reconstruction or expansion of housing buildings and ancillary structures. In addition to using large cranes to lift high-rise materials during house construction, small hoists with higher flexibility are also used. Their purpose is to flexibly lift and move small equipment or construction items on each floor or inside.

[0003] For example, the patent with the patent authorization publication number CN218465379U and the announcement date of 2023-02-10 discloses a lifting device for house construction, including a support plate and a lifting structure arranged on the support plate, a support seat is arranged below the support plate, a displacement structure is arranged on the support plate, and the displacement structure includes an operating rod rotatably connected to the support plate, and a roller is arranged below the operating rod. However, the above scheme still has certain shortcomings in actual use. For example, during the lifting process, due to various factors (such as vibration, wind force, rope tension, etc.), the material lifted by the wire rope is easy to swing around, which not only affects the stability of the lifting, but also may cause bumps and damage to the material.

[0004] Based on the above situation, the present invention proposes a lifting device for construction engineering. Summary of the invention

[0005] In order to overcome the disadvantage that materials hoisted by wire ropes are prone to swing due to various factors (such as vibration, wind force, rope tension, etc.), which not only affects the stability of the hoisting but also may cause collision and damage to the materials, the present invention proposes a lifting device for construction engineering.

[0006] Technical solution: A lifting device for construction engineering, including a base plate, on which evenly distributed sliding rods are fixed, wherein an indoor elevator is slidably connected between two sliding rods, a first guide wheel is rotatably connected to the top of the indoor elevator, a motor is installed on the indoor elevator, a first rope pulley is rotatably connected to the side of the indoor elevator close to the motor, the output shaft of the motor is connected to the first rope pulley through a coupling, a first pull rope is wound on the first rope pulley, symmetrically distributed L-shaped mounting frames are fixed to the side of the indoor elevator close to the first guide wheel, the symmetrically distributed L-shaped mounting frames are arranged opposite to each other, symmetrically distributed guide rails are fixed to the symmetrically distributed L-shaped mounting frames, connecting pieces are slidably connected between two adjacent guide rails, symmetrically distributed first springs are connected between the connecting pieces and adjacent L-shaped mounting frames, the first springs are wound around adjacent guide rails, and the symmetrically distributed connecting pieces are rotatably connected to second guide wheels.

[0007] Furthermore, it also includes a guide block. A symmetrically distributed guide block is fixedly connected to one side of the indoor elevator close to the first guide wheel. The movable end of the first pull rope passes through the symmetrically distributed guide block and passes around the first guide wheel and the symmetrically distributed second guide wheel in turn.

[0008] Furthermore, a cargo box is included, and a hook is provided at the movable end of the first pull rope, and the cargo box is placed on the hook.

[0009] Furthermore, the first pull rope is squeeze-fitted with the symmetrically distributed second guide wheels.

[0010] Furthermore, it also includes a positioning mechanism for allowing the downward-moving cargo box to adjust the landing point and hover when there is someone underneath. The positioning mechanism is arranged on the cargo box, and includes a first connecting ring, which is rotatably connected to the cargo box, and a bottom of the first connecting ring is fixedly connected with elastic telescopic parts evenly distributed along the circumferential direction, a second spring is connected between the telescopic part and the fixed part of each elastic telescopic part, and a support frame is fixedly connected to the telescopic part of the evenly distributed elastic telescopic parts, a telescopic column is fixedly connected to the bottom of the first connecting ring, and the telescopic part of the telescopic column is fixedly connected with a threaded sleeve, a screw is fixedly connected to the bottom of the cargo box, the threaded sleeve is threadedly connected to the screw, and an electric push rod is fixedly connected to the bottom of the screw, and a pushing member is fixedly connected to the telescopic part of the electric push rod, and the top of the pushing member contacts the bottom of the threaded sleeve, and a moving member is connected between the telescopic parts of the evenly distributed elastic telescopic parts, the electric push rod and the pushing member pass through the moving member, and the top of the moving member contacts the pushing member.

[0011] Furthermore, an image detector is also included. The image detector is installed at the bottom of the cargo box, and the image detector is electrically connected to the electric push rod through a control module.

[0012] Furthermore, it also includes a speed-stabilizing mechanism for allowing the indoor elevator to move more smoothly on the sliding rod. The speed-stabilizing mechanism is arranged on the base plate, and the speed-stabilizing mechanism includes an air cylinder. The air cylinder is fixedly connected to the side of the base plate close to the indoor elevator. A piston is slidably connected inside the air cylinder. The piston is fixedly connected to the indoor elevator, and the indoor elevator is slidably connected to the outer wall of the air cylinder. An air hole for air inlet and outlet is opened on the side of the air cylinder away from the indoor elevator, and a box changing assembly is provided on the base plate.

[0013] Furthermore, the box changing assembly includes a rotating shaft, which is rotatably connected to the middle of the bottom plate, a gear is fixed to the rotating shaft, a flat plate is slidably connected between two sliding rods on the side away from the indoor elevator, a first rack is fixed to the side of the indoor elevator close to the gear, and a second rack is fixed to the side of the flat plate close to the air cylinder.

[0014] Furthermore, the first rack, the second rack and the gear are all meshed.

[0015] Furthermore, it also includes an anti-collision mechanism for rotating the cargo box when lifting long materials. The anti-collision mechanism is arranged on the indoor elevator. The anti-collision mechanism includes a second connecting ring. The second connecting ring is fixedly connected to a side of the indoor elevator close to the first guide wheel. A rotating frame is rotatably connected to the second connecting ring. A symmetrically distributed second rope pulley is rotatably connected to the rotating frame. Torsion springs are connected between the symmetrically distributed second rope pulleys and the rotating frame. The symmetrically distributed torsion springs are all wound around adjacent second rope pulleys. Second pull ropes are all wound around the symmetrically distributed second rope pulleys. Hooks are also provided on the movable ends of the symmetrically distributed second pull ropes. The symmetrically distributed hooks are in contact with the cargo box.

[0016] The present invention has the following advantages: the present invention uses the second guide wheel, the connecting piece, the first spring, etc. to cooperate with each other, so that the cargo box can move up smoothly during the lifting process, avoiding collision and damage of materials in the cargo box due to shaking, and improving the stability and safety of lifting.

[0017] The present invention can change the landing point of the support frame and make the cargo box hover in mid-air through the cooperation of the image detector and the electric push rod, effectively avoiding injuries to personnel and improving the protection performance of the device. In addition, by designing three support frames at the bottom of the cargo box, it is ensured that the cargo box can land stably even if there are scattered objects on the ground, further improving the safety and practicality of the device.

[0018] The present invention firstly utilizes the air cylinder and the piston to enable the indoor elevator to remain stable when moving forward and backward, so that the materials in the cargo box can remain stable when entering and exiting the floor, and then the first rack, the gear, and the second rack cooperate with each other to realize the forward and backward movement of the flat plate, which makes it easy to remove the cargo box loaded with materials from the first pull rope and hang the empty cargo box on the first pull rope, thereby improving work efficiency.

[0019] The present invention allows the cargo box to rotate when lifting long strips of materials through a rotating frame, effectively avoiding the collision of the long strips of materials with the wall during the lifting process, and improving the safety and efficiency of the lifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0021] Figure 2 It is a three-dimensional structural schematic diagram of the bottom plate, slide rod, indoor lift and other components of the present invention.

[0022] Figure 3 It is a schematic diagram of the three-dimensional structure of the L-shaped mounting frame, the second guide wheel, the connecting piece and other components of the present invention.

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure of the guide block, guide rail, first spring and other components of the present invention.

[0024] Figure 5 It is a sectional view of the three-dimensional structure of the first connecting ring, the second spring, the elastic telescopic member and other components of the present invention.

[0025] Figure 6 It is a schematic diagram of the three-dimensional structure of the screw rod, the pusher, the support frame and other components of the present invention.

[0026] Figure 7 It is a three-dimensional structural schematic diagram of the air cylinder, the first rack and the gear and other components of the present invention.

[0027] Figure 8 It is a sectional view of the three-dimensional structure of the piston, plate, indoor lift and other components of the present invention.

[0028] Fig. 9 It is a schematic diagram of the three-dimensional structure of the second connecting ring, the rotating frame, the second rope pulley and other components of the present invention.

[0029] In the above figures: 1: bottom plate, 11: sliding rod, 12: indoor elevator, 121: first guide wheel, 122: guide block, 13: motor, 14: first rope pulley, 15: first pull rope, 16: cargo box, 17: second guide wheel, 18: connecting member, 19: guide rail, 110: first spring, 111: L-shaped mounting frame, 2: first connecting ring, 21: elastic telescopic member, 22: second spring, 23: support Frame, 24: telescopic column, 25: threaded sleeve, 26: moving part, 27: electric push rod, 28: pushing part, 29: screw, 210: image detector, 3: air cylinder, 31: piston, 32: air hole, 33: first rack, 34: gear, 341: rotating shaft, 35: second rack, 36: flat plate, 4: second connecting ring, 41: rotating frame, 42: torsion spring, 43: second rope pulley, 44: second pull rope. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Embodiment 1: A lifting device for construction engineering, such as Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, it includes a bottom plate 1, four sliding rods 11 evenly distributed are fixed on the bottom plate 1, an indoor lift 12 is slidably connected between the two sliding rods 11 on the left, a first guide wheel 121 is rotatably connected to the top of the indoor lift 12, a motor 13 is installed on the upper rear side of the indoor lift 12, a first rope pulley 14 is rotatably connected to the upper rear side of the indoor lift 12, an output shaft on the left side of the motor 13 is connected to the first rope pulley 14 through a coupling, a first pull rope 15 is wound around the first rope pulley 14, and the left and right sides of the upper part of the indoor lift 12 are connected to the first rope pulley 14. L-shaped mounting frames 111 are fixedly connected on both sides, and the two L-shaped mounting frames 111 are arranged facing each other. Guide rails 19 are fixedly connected to the front and rear sides of the two L-shaped mounting frames 111. A connecting piece 18 is slidably connected between two adjacent guide rails 19. A symmetrically distributed first spring 110 is connected between the connecting piece 18 and the adjacent L-shaped mounting frames 111. The first springs 110 are wound around the adjacent guide rails 19. Second guide wheels 17 are rotatably connected to the two connecting pieces 18, and the first pull rope 15 is squeezed and fitted with the two second guide wheels 17.

[0032] like Figure 2 , Figure 3 and Figure 4 As shown, it also includes guide blocks 122, which are symmetrically distributed and fixed to the upper rear side of the indoor elevator 12. The movable end of the first pull rope 15 passes through the two guide blocks 122 and passes around the upper side of the first guide wheel 121, the left side of the upper second guide wheel 17, and the right side of the lower second guide wheel 17 in turn.

[0033] like Figure 2 As shown, a cargo box 16 is also included. The movable end of the first pull rope 15 is provided with a hook, and the cargo box 16 is placed on the hook.

[0034] When materials need to be lifted, the staff first installs the device on the designated floor, and then pushes the indoor elevator 12 forward, thereby driving the cargo box 16 to move forward and out of the floor through the first pull rope 15, and then controls the motor 13 to drive the first rope pulley 14 to rotate forward and release the first pull rope 15. Under the action of the cargo box 16's own gravity, the cargo box 16 will drive the first pull rope 15 to move downward, thereby causing the first guide wheel 121 and the second guide wheel 17 to rotate. When the cargo box 16 moves down to the ground, the motor 13 stops running and the materials are placed in the cargo box 16. Then, the motor 13 is controlled to drive the first rope pulley 14 to reverse and reel in the first pull rope 15. The first pull rope 15 will drive the cargo box 16 containing materials to move upward. During the upward movement of the cargo box 16, the cargo box 16 shakes left and right due to various factors.

[0035] When the cargo box 16 is swayed to the left, the cargo box 16 will drive the first pull rope 15 to move to the left, thereby causing the second guide wheel 17 on the lower side to move to the left, and then driving the lower connecting piece 18 to move to the left, causing the lower first spring 110 to deform. Similarly, when the cargo box 16 is swayed to the right, the second guide wheel 17 on the upper side drives the connecting piece 18 to move to the right, and the first spring 110 on the upper side is also deformed. At the same time, under the elastic action of the first spring 110 on the lower side, the connecting piece 18 on the lower side will drive the second guide wheel 17 to move right and reset. As the first spring 110 continues to deform and reset, the first The spring 110 will absorb the shaking force generated by the cargo box 16, so that the cargo box 16 can rise smoothly. When the cargo box 16 rises to the floor where it is located, the control motor 13 will stop running, and the indoor elevator 12 will be pulled backward, thereby driving the cargo box 16 to move backward to enter the floor. The staff can remove the cargo box 16 from the first pull rope 15. In summary, through the cooperation of the second guide wheel 17, the connecting piece 18, the first spring 110, etc., the cargo box 16 can move up smoothly during the lifting process, avoiding collision and damage of the materials in the cargo box 16 due to shaking, thereby improving the stability and safety of the lifting.

[0036] Embodiment 2: Based on embodiment 1, Figure 5 and Figure 6 As shown, it also includes a positioning mechanism for adjusting the landing point and hovering of the downwardly moved cargo box 16 when there is someone below. The positioning mechanism is arranged on the cargo box 16, and the positioning mechanism includes a first connecting ring 2, which is rotatably connected to the lower part of the cargo box 16, and three elastic telescopic members 21 uniformly distributed along the circumferential direction are fixedly connected to the bottom of the first connecting ring 2, and a second spring 22 is connected between the telescopic part and the fixed part of each elastic telescopic member 21, and a support frame 23 is fixedly connected to the telescopic part of the three elastic telescopic members 21. A telescopic column 24 is fixedly connected to the bottom, a threaded sleeve 25 is fixedly connected to the telescopic part of the telescopic column 24, a screw 29 is fixedly connected to the bottom of the cargo box 16, the threaded sleeve 25 is threadedly connected to the screw 29, an electric push rod 27 is fixedly connected to the bottom of the screw 29, a pushing member 28 is fixedly connected to the telescopic part of the electric push rod 27, the top of the pushing member 28 contacts the bottom of the threaded sleeve 25, a moving member 26 is connected between the telescopic parts of the three elastic telescopic members 21, the electric push rod 27 and the pushing member 28 pass through the moving member 26, and the top of the moving member 26 contacts the pushing member 28.

[0037] like Figure 6 As shown, an image detector 210 is also included. The image detector 210 is installed at the bottom of the cargo box 16. The image detector 210 is electrically connected to the electric push rod 27 through a control module.

[0038] When the cargo box 16 drives the first pull rope 15 to move downward, the first pull rope 15 will also drive the first connecting ring 2, the screw rod 29, the image detector 210, etc. to move downward. When the image detector 210 moving downward detects that there is someone at the landing point below, the image detector 210 will first control the electric push rod 27 to drive the pushing member 28 to move upward. The pushing member 28 moving upward will push the threaded sleeve 25 upward, so that the telescopic column 24 will shrink and rotate upward, thereby driving the first connecting ring 2, the elastic telescopic member 21, and the support frame 23 to rotate a certain angle. The rotating support frame 23 will change the landing point to avoid injuring people, and the image detector 210 will control the electric push rod 27 to drive the pushing member 28 to move downward, thereby making the elastic telescopic member 21 extend downward, the second spring 22 will deform, and then drive the support frame 23 to move downward until it is against the ground, so that the cargo box 16 will hover above the person's head.

[0039] When the person walks away from under the cargo box 16, the image detector 210 controls the electric push rod 27 again to drive the pushing member 28 to move upward and reset, and under the elastic action of the second spring 22, the elastic telescopic member 21 drives the support frame 23 to move upward and reset, and at the same time, under the action of the cargo box 16's own gravity, the cargo box 16 continues to drive the support frame 23 to move down until it contacts the ground. In summary, through the cooperation of the image detector 210 and the electric push rod 27, the landing point of the support frame 23 can be changed and the cargo box 16 can be suspended in mid-air, which effectively avoids injuring people and improves the protection performance of the device. In addition, by designing three support frames 23 at the bottom of the cargo box 16, it is ensured that even if there are scattered objects on the ground, it can still land stably, further improving the safety and practicality of the device.

[0040] like Figure 7 and Figure 8 As shown, it also includes a speed stabilizing mechanism for allowing the indoor elevator 12 to move more smoothly on the slide bar 11. The speed stabilizing mechanism is arranged on the base plate 1, and the speed stabilizing mechanism includes an air cylinder 3. The air cylinder 3 is fixedly connected to the left rear side of the base plate 1, and a piston 31 is slidably connected inside the air cylinder 3. The front side of the piston 31 is fixedly connected to the indoor elevator 12, and the indoor elevator 12 is slidably connected to the outer wall of the air cylinder 3. An air hole 32 for air inlet and outlet is opened at the rear of the air cylinder 3, and a box changing assembly is provided on the base plate 1.

[0041] like Figure 7 and Figure 8 As shown, the box changing assembly includes a rotating shaft 341, which is rotatably connected to the middle part of the bottom plate 1, a gear 34 is fixedly connected to the rotating shaft 341, a flat plate 36 is slidably connected between the two sliding rods 11 on the right side, a first rack 33 is fixedly connected to the right side of the indoor elevator 12, and a second rack 35 is fixedly connected to the left side of the flat plate 36, and the first rack 33, the second rack 35 are all meshed with the gear 34.

[0042] Initially, an empty cargo box 16 is placed on the flat plate 36. When the indoor lift 12 moves forward and backward, the indoor lift 12 drives the piston 31 and the first rack 33 to move forward and backward. When the piston 31 moves forward and backward, air is introduced into or discharged from the air hole 32. Due to the friction between the piston 31 and the inner wall of the air cylinder 3, the indoor lift 12 can maintain a stable speed when moving forward and backward, so that the materials in the cargo box 16 can also remain stable when entering and leaving the floor. When the first rack 33 moves forward and backward, the first rack 33 drives the second rack 35 to move forward and backward through the gear 34, thereby driving the flat plate 36 to move forward and backward. When the flat plate 36 moves forward, the staff will load the cargo box 16. The cargo box 16 with materials is removed from the first pull rope 15, and the cargo box 16 on the flat plate 36 is hung on the first pull rope 15 again. When the flat plate 36 moves backward, the empty cargo box 16 can continue to be placed on the flat plate 36. In summary, the air cylinder 3 and the piston 31 are first used to allow the indoor elevator 12 to remain stable when moving forward and backward, so that the materials in the cargo box 16 can remain stable when entering and exiting the floor, and then the first rack 33, the gear 34, and the second rack 35 cooperate with each other to realize the forward and backward movement of the flat plate 36, so that the cargo box 16 with materials is removed from the first pull rope 15 and the empty cargo box 16 is hung on the first pull rope 15, thereby improving work efficiency.

[0043] like Fig. 9 As shown, it also includes an anti-collision mechanism for rotating the cargo box 16 when lifting long materials. The anti-collision mechanism is arranged on the indoor elevator 12, and the anti-collision mechanism includes a second connecting ring 4, and the second connecting ring 4 is fixedly connected to the upper front side of the indoor elevator 12. A rotating frame 41 is rotatably connected in the second connecting ring 4, and the left and right parts of the rotating frame 41 are rotatably connected to second rope pulleys 43. Torsion springs 42 are connected between the two second rope pulleys 43 and the rotating frame 41. The two torsion springs 42 are respectively wound on the adjacent second rope pulleys 43, and the two second rope pulleys 43 are wound with second pull ropes 44. Hooks are also provided on the movable ends of the two second pull ropes 44, and the two hooks are in contact with the cargo box 16.

[0044] When it is necessary to lift long strips of material, one end of the long strip of material is inserted into the cargo box 16, and the other end will extend outward from the cargo box 16. To prevent the extended part from hitting the wall and causing damage during lifting, the specific operation is as follows: the staff can rotate the rotating frame 41, thereby driving the second rope pulley 43 to rotate, and then driving the cargo box 16 and the material therein to rotate through the second pull rope 44. The rotated material will move away from the wall. When the cargo box 16 drives the first pull rope 15 to move downward, the cargo box 16 will also drive the second pull rope 44 to move downward, thereby driving the second rope pulley 43 to rotate forward to release the second pull rope 44, and the torsion spring 42 will be twisted. When the cargo box 16 moves upward, under the action of the torsion spring 42, the second rope pulley 43 reverses and rewinds the second pull rope 44. In summary, the rotating frame 41 allows the cargo box 16 to rotate when lifting long strips of material, effectively avoiding the collision of the long strips of material with the wall during the lifting process, thereby improving the safety and efficiency of the lifting.

[0045] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A lifting device for construction engineering, characterized in that: The invention comprises a bottom plate (1), on which evenly distributed sliding bars (11) are fixedly connected, wherein an indoor lift (12) is slidably connected between two sliding bars (11), a first guide wheel (121) is rotatably connected to the top of the indoor lift (12), a motor (13) is installed on the indoor lift (12), a first rope pulley (14) is rotatably connected to a side of the indoor lift (12) close to the motor (13), an output shaft of the motor (13) is connected to the first rope pulley (14) through a coupling, a first pull rope (15) is wound around the first rope pulley (14), and the indoor lift (12) is close to the first pulley. A symmetrically distributed L-shaped mounting frame (111) is fixedly connected to one side of the guide wheel (121); the symmetrically distributed L-shaped mounting frames (111) are arranged facing each other; symmetrically distributed guide rails (19) are fixedly connected to the symmetrically distributed L-shaped mounting frames (111); a connecting piece (18) is slidably connected between two adjacent guide rails (19); symmetrically distributed first springs (110) are connected between the connecting piece (18) and the adjacent L-shaped mounting frame (111); the first springs (110) are wound around the adjacent guide rails (19); and the symmetrically distributed connecting pieces (18) are rotatably connected to the second guide wheels (17).

2. A lifting device for construction engineering according to claim 1, characterized in that: It also includes a guide block (122), which is symmetrically distributed and fixed to one side of the indoor elevator (12) close to the first guide wheel (121). The movable end of the first pull rope (15) passes through the symmetrically distributed guide block (122) and passes around the first guide wheel (121) and the symmetrically distributed second guide wheel (17) in turn.

3. A lifting device for construction engineering according to claim 2, characterized in that: It also includes a cargo box (16), and a hook is provided at the movable end of the first pull rope (15), and the cargo box (16) is placed on the hook.

4. A lifting device for construction engineering according to claim 3, characterized in that: The first pull rope (15) and the symmetrically distributed second guide wheels (17) are both squeeze-fitted.

5. A lifting device for construction engineering according to claim 4, characterized in that: The device also includes a positioning mechanism for adjusting the landing point and hovering of the cargo box (16) when there is someone below. The positioning mechanism is arranged on the cargo box (16). The positioning mechanism includes a first connecting ring (2). The first connecting ring (2) is rotatably connected to the cargo box (16). The bottom of the first connecting ring (2) is fixedly connected with elastic telescopic parts (21) evenly distributed along the circumference. A second spring (22) is connected between the telescopic part and the fixed part of each elastic telescopic part (21). The telescopic parts of the evenly distributed elastic telescopic parts (21) are fixedly connected with a support frame (23). The bottom of the first connecting ring (2) is fixedly connected with a telescopic column (24). ), the telescopic part of the telescopic column (24) is fixedly connected with a threaded sleeve (25), the bottom of the cargo box (16) is fixedly connected with a screw rod (29), the threaded sleeve (25) and the screw rod (29) are threadedly connected, the bottom of the screw rod (29) is fixedly connected with an electric push rod (27), the telescopic part of the electric push rod (27) is fixedly connected with a push member (28), the top of the push member (28) contacts the bottom of the threaded sleeve (25), the telescopic parts of the uniformly distributed elastic telescopic parts (21) are connected with a moving member (26), the electric push rod (27) and the push member (28) pass through the moving member (26), and the top of the moving member (26) contacts the push member (28).

6. A lifting device for construction engineering according to claim 5, characterized in that: The container also includes an image detector (210), which is installed at the bottom of the container (16). The image detector (210) is electrically connected to the electric push rod (27) via a control module.

7. A lifting device for construction engineering according to claim 6, characterized in that: The invention also includes a speed stabilizing mechanism for allowing the indoor lift (12) to move more smoothly on the slide bar (11). The speed stabilizing mechanism is arranged on the bottom plate (1). The speed stabilizing mechanism includes an air cylinder (3). The air cylinder (3) is fixedly connected to a side of the bottom plate (1) close to the indoor lift (12). A piston (31) is slidably connected inside the air cylinder (3). The piston (31) is fixedly connected to the indoor lift (12). The indoor lift (12) is slidably connected to the outer wall of the air cylinder (3). An air hole (32) for air inlet and outlet is provided on a side of the air cylinder (3) away from the indoor lift (12). A box changing assembly is provided on the bottom plate (1).

8. A lifting device for construction engineering according to claim 7, characterized in that: The box changing assembly comprises a rotating shaft (341), the rotating shaft (341) is rotatably connected to the middle part of the bottom plate (1), a gear (34) is fixedly connected to the rotating shaft (341), a flat plate (36) is slidably connected between two sliding rods (11) on the side away from the indoor lift (12), a first rack (33) is fixedly connected to the side of the indoor lift (12) close to the gear (34), and a second rack (35) is fixedly connected to the side of the flat plate (36) close to the air cylinder (3).

9. A lifting device for construction engineering according to claim 8, characterized in that: The first rack (33), the second rack (35) and the gear (34) are all meshed.

10. A lifting device for construction engineering according to claim 9, characterized in that: The utility model also comprises an anti-collision mechanism for rotating the cargo box (16) when lifting long strips of material. The anti-collision mechanism is arranged on the indoor elevator (12). The anti-collision mechanism comprises a second connecting ring (4). The second connecting ring (4) is fixedly connected to a side of the indoor elevator (12) close to the first guide wheel (121). A rotating frame (41) is rotatably connected inside the second connecting ring (4). A symmetrically distributed second rope reel (43) is rotatably connected to the rotating frame (41). Torsion springs (42) are connected between the symmetrically distributed second rope reel (43) and the rotating frame (41). The symmetrically distributed torsion springs (42) are all wound around adjacent second rope reel (43). A second pull rope (44) is wound around the symmetrically distributed second rope reel (43). A hook is also arranged on the movable end of the symmetrically distributed second pull rope (44). The symmetrically distributed hooks are in contact with the cargo box (16).

Images