Lifting device for bridge construction

Abstract

The utility model relates to the technical field of hoisting equipment, in particular to a hoisting device for bridge construction, which comprises a support cross rod and vertical rods fixedly connected to two ends of the support cross rod, a base is arranged at the bottom of each vertical rod, a movable cross rod is slidably connected between the two vertical rods, a sliding component is slidably connected onto the movable cross rod, and the movable cross rod is connected with the base. A hook is arranged at the lower end of the sliding assembly. The portal frame solves the problems that when the portal frame lifts goods, a lifting rope is prone to shaking, and the goods fall off from the portal frame.

Description

Technical Field

[0001] The utility model relates to the technical field of hoisting equipment, and particularly relates to a hoisting device for bridge construction. Background Art

[0002] With the development of society, China has also achieved brilliant results in the field of bridges. In recent years, there has been a wide variety of bridge construction in China, and the types of bridge precast beams have also increased accordingly. Moreover, the weight and volume of bridge precast beams have become larger and larger. As an important part of bridge installation, the hoisting of bridge components not only has high risks but also affects the overall construction efficiency of bridges.

[0003] When a gantry is needed for bridge preloading, during the process of the gantry lifting goods, the hoisting ropes are prone to shaking. When the shaking is severe, it may cause the goods to fall off the gantry, resulting in low safety during the hoisting process. Content of the Utility Model

[0004] In order to solve the problems of the above-mentioned existing technologies, the utility model provides a hoisting device for bridge construction, which solves the problems that the hoisting ropes are prone to shaking and the goods fall off the gantry when the gantry lifts the goods.

[0005] To achieve the above object, the utility model provides the following technical solution: A hoisting device for bridge construction, comprising a support crossbar and vertical rods fixedly connected to both ends of the support crossbar. A base is provided at the bottom of the vertical rods. A movable crossbar is slidably connected between the two vertical rods. A sliding component is slidably connected to the movable crossbar, and a hook is provided at the lower end of the sliding component.

[0006] With the above structural design, the support crossbar can move vertically between the two vertical rods. The support crossbar is directly connected to the component to be hoisted through the hook, so that the ropes will not shake during the hoisting process, improving the safety of hoisting.

[0007] Preferably, U-shaped frames are fixedly connected to both ends of the support crossbar and are clamped on the vertical rods. A gear is rotatably connected to the U-shaped frame through a rotating shaft. A driving motor is installed at one end of the rotating shaft. A rack is fixedly connected to the inner part of the vertical rod along the length direction. The gear meshes with the rack. A chute is formed on the side wall of the vertical rod, and both ends of the rotating shaft pass through the chute.

[0008] With the above structural design, through the cooperation of the gear and the rack, the support crossbar can move stably in the vertical direction. At the same time, the rotating shaft slides in the chute, strengthening the connection between the support crossbar and the vertical rod.

[0009] Preferably, the support cross bar is of I-beam steel structure. The sliding assembly includes a moving frame clamped to the lower flange of the support cross bar, and pulleys rotatably connected to both ends of the moving frame. The pulleys are located on both sides of the web of the support cross bar and are in rolling connection with the lower flange of the support cross bar.

[0010] With the above structural design, the sliding assembly can move on the support cross bar by rolling the pulleys on the web of the support cross bar, which is convenient for adjusting the position of the sliding assembly according to the components to be hoisted as needed.

[0011] Preferably, two sliding assemblies are symmetrically arranged on the moving cross bar.

[0012] With the above structural design, the firmness of the object being hung is increased by setting double hooks, which is convenient for hanging the two ends of a longer object, so that the two ends of the longer object will not swing back and forth during hoisting, facilitating the stable hoisting of the bridge component.

[0013] Preferably, the limiting assembly includes a threaded rotating rod passing through the moving frame and threadedly connected to the moving frame. One end of the threaded rotating rod is provided with a knob, and the other end of the threaded rotating rod is provided with a fixing plate, which abuts against the support cross bar.

[0014] With the above structural design, the limiting assembly is set to facilitate fixing the moving frame after adjusting the positions of the two hooks, preventing the sliding assembly from sliding during the process of hoisting the bridge component and affecting the stability of hoisting.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0016] The support cross bar can move vertically between the two vertical rods. The support cross bar is directly connected to the component to be hoisted through the hook, so that the situation of rope shaking will not occur during the hoisting process, improving the safety of hoisting. Through the cooperation of the gear and the rack, the support cross bar can move stably in the vertical direction. At the same time, the rotating shaft slides in the chute, strengthening the connection between the support cross bar and the vertical rod and increasing the stability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic structural diagram of the present utility model;

[0018] Figure 2 is a schematic structural diagram of the support cross bar of the present utility model;

[0019] Figure 3 is a top view of the support cross bar of the present utility model;

[0020] Figure 4 is a schematic structural diagram of the sliding assembly of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to 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. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the protection scope of the present invention.

[0022] Please refer to Figures 1-4 , the present invention provides a technical solution: a hoisting device for bridge construction, including a support crossbar 1 and vertical rods 2 fixedly connected to both ends of the support crossbar 1. A base 5 is provided at the bottom of the vertical rods 2. A moving crossbar 3 is slidably connected between the two vertical rods 2. A sliding assembly 4 is slidably connected to the moving crossbar 3. A hook 6 is provided at the lower end of the sliding assembly 4. The support crossbar 1 can move in the vertical direction between the two vertical rods 2. The support crossbar 1 is directly connected to the component to be hoisted through the hook 6, so that the situation of rope shaking will not occur during the hoisting process, improving the safety of hoisting.

[0023] U-shaped frames 31 are fixedly connected to both ends of the support crossbar 1 and are clamped on the vertical rods 2. A gear 32 is rotatably connected to the U-shaped frames 31 through a rotating shaft 33. A driving motor 34 is installed at one end of the rotating shaft 33. A rack 22 is fixedly connected to the inside of the vertical rod 2 along the length direction. The gear 32 meshes with the rack 22. A chute 21 is opened on the side wall of the vertical rod 2. Both ends of the rotating shaft 33 pass through the chute 21. Through the cooperation of the gear 32 and the rack 22, the support crossbar 1 can move stably in the vertical direction. At the same time, the rotating shaft 33 slides in the chute 21, strengthening the connection between the support crossbar 1 and the vertical rod 2.

[0024] The support crossbar 1 is of I-beam structure. The sliding assembly 4 includes a moving frame 41 clamped on the lower flange of the support crossbar 1 and pulleys 42 rotatably connected to both ends of the moving frame 41. The pulleys 42 are located on both sides of the web of the support crossbar 1 and are in rolling connection with the lower flange of the support crossbar 1. By rolling the pulleys 42 on the web of the support crossbar 1, the sliding assembly 4 can move on the support crossbar 1, facilitating the adjustment of the position of the sliding assembly 4 according to the component to be hoisted.

[0025] Two sliding assemblies 4 are symmetrically arranged on the moving crossbar 3. By setting double hooks 6, the firmness of the object being hung is increased, thus facilitating the hanging of both ends of a longer object, so that both ends of the longer object will not swing back and forth during hoisting, facilitating the stable hoisting of the bridge component.

[0026] The limiting component includes a threaded rotating rod 73 that passes through the moving frame 41 and is threadedly connected to the moving frame 41. One end of the threaded rotating rod 73 is equipped with a knob 71, and the other end of the threaded rotating rod 73 is equipped with a fixing plate 72, and the fixing plate 72 abuts against the support cross bar 1. The limiting component is provided to facilitate fixing the moving frame 41 after adjusting the positions of the two hooks 6, and to prevent the sliding component 4 from sliding during the process of hoisting the bridge component, thus affecting the stability of the hoisting.

[0027] Working principle: After the construction workers move this device to the construction site, first, they adjust the distance between the two hooks 6 according to the size of the bridge component, so that the hooks 6 can lift both ends of the component, ensuring the stability of the hoisting process. After the positions of the hooks 6 are determined, rotate the knob 71 to make the fixing plate 72 closely abut against the support cross bar 1, increasing the friction between the two, thereby fixing the moving frame 41 on the support cross bar 1 and preventing the sliding component 4 from sliding during the process of hoisting the bridge component. Then the construction workers start the driving motor 34 to make the rotating shaft 33 drive the gear 32 to rotate. Since the gear 32 meshes with the rack 22, the support cross bar 1 can move vertically between the two vertical rods 2, and there will be no situation of the rope shaking during the hoisting process, improving the safety of the hoisting.

[0028] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A lifting device for bridge construction, comprising a supporting crossbar (1) and vertical poles (2) fixedly connected to both ends of the supporting crossbar (1), characterized in that: A base (5) is provided at the bottom of the vertical pole (2), a movable cross bar (3) is slidably connected between the two vertical poles (2), a sliding assembly (4) is slidably connected to the movable cross bar (3), and a hook (6) is provided at the lower end of the sliding assembly (4).

2. A lifting device for bridge construction according to claim 1, characterized in that: The two ends of the supporting cross bar (1) are fixedly connected with a U-shaped frame (31) clamped on the vertical pole (2); a gear (32) is rotatably connected to the U-shaped frame (31) via a rotating shaft (33); a driving motor (34) is installed at one end of the rotating shaft (33); a rack (22) is fixedly connected to the inside of the vertical pole (2) along the length direction; the gear (32) is meshed with the rack (22); a sliding groove (21) is provided on the side wall of the vertical pole (2); and the two ends of the rotating shaft (33) pass through the sliding groove (21).

3. A lifting device for bridge construction according to claim 1, characterized in that: The supporting cross bar (1) is an I-beam structure, and the sliding assembly (4) comprises a moving frame (41) clamped on the lower flange of the supporting cross bar (1), and pulleys (42) rotatably connected to both ends of the moving frame (41), wherein the pulleys (42) are located on both sides of the web of the supporting cross bar (1) and are rollingly connected to the lower flange of the supporting cross bar (1), and a limiting assembly for limiting the movement of the sliding assembly (4) is installed on the moving frame (41).

4. A lifting device for bridge construction according to claim 1, characterized in that: Two sliding components (4) are symmetrically arranged on the movable crossbar (3).

5. A lifting device for bridge construction according to claim 3, characterized in that: The limiting assembly comprises a threaded rotating rod (73) passing through the movable frame (41) and threadedly connected to the movable frame (41); a knob (71) is mounted on one end of the threaded rotating rod (73); a fixing plate (72) is mounted on the other end of the threaded rotating rod (73); and the fixing plate (72) abuts against the supporting cross bar (1).

Images