Balanced pulley hoist device for assembled precast component

Abstract

A self-balancing pulley lifting device for prefabricated components. It includes a guide frame, a frame wire rope, a fixed lifting ring, a lifting movable pulley, a guide pulley, a pulley block wire rope, a lifting chain, and corner pulleys. The advantages of this invention are: the overall structure is made of steel, making it stable, simple, and easy to operate. The pulley block wire rope runs through all pulleys, forming a unified whole. During lifting, the wire rope freely adjusts the height of each lifting movable pulley according to the force applied, ensuring that all forces are evenly transmitted during the lifting of the prefabricated component, achieving a self-balancing effect and avoiding problems such as cracking and damage to prefabricated components caused by ordinary lifting devices. The position of the guide pulley can be adjusted by tightening bolts, allowing the positions of the lifting movable pulley and lifting chain to adapt to the lifting point positions of different types of prefabricated components, ensuring direct force transmission, enhancing the efficiency, safety, and economy of prefabricated component lifting, and providing better protection for the finished product. The lifting chain and lifting movable pulley can be freely adjusted according to the number of lifting points on the prefabricated component.

Description

Technical Field

[0001] This utility model belongs to the technical field of prefabricated component hoisting equipment, and specifically relates to a self-balancing pulley hoisting device for prefabricated components. Background Technology

[0002] In recent years, with the rapid development of prefabricated buildings in China, the prefabrication of concrete structural components has become a key link in the prefabricated building industry chain. Prefabricated concrete structural components mainly include two categories: composite slabs and composite beams (horizontal components) and wall panels and columns (vertical components). Composite slabs are mostly produced using assembly line methods, while other components, especially sandwich insulated exterior wall panels and irregularly shaped components, are mainly produced using fixed mold platforms. Since prefabricated components are horizontal during production, they all require horizontal demolding. However, due to the special design of prefabricated components, some components experience eccentric stress during hoisting. Therefore, smoothly and horizontally demolding and hoisting the prefabricated components is a crucial step in the prefabrication process.

[0003] The existing methods for hoisting precast components have the following problems: 1) The center of gravity of the precast component is difficult to adjust during the hoisting process, so the wire ropes need to be moved frequently and adjusted in length, resulting in many adjustments. Moreover, it needs to be carried out in conjunction with the overhead crane, so the work efficiency is low; 2) Precast components are usually hoisted using wire ropes, and the length of each wire rope has deviations during the manufacturing process, which leads to unbalanced forces on the hoisted component; 3) A single balance beam is used on the hoisted component, and the hoisting of some eccentric precast components will cause instability in the hoisting process, thus posing safety and quality hazards to the hoisting construction of precast components. Utility Model Content

[0004] In order to solve the above problems, the purpose of this utility model is to provide a self-balancing pulley lifting device for prefabricated components.

[0005] To achieve the above objectives, the prefabricated component self-balancing pulley lifting device provided by this utility model includes a guide frame, a lifting frame wire rope, a fixed lifting ring, a lifting movable pulley, a guide pulley, a pulley block wire rope, a lifting chain, and a corner pulley; wherein, the guide frame is a rectangular frame composed of two guide longitudinal beams and two guide transverse beams, arranged horizontally; at least one lifting frame wire rope is installed on the top surface of each of the two guide longitudinal beams, and multiple adjustable-space guide pulleys are installed at the bottom, with a fixed lifting ring and a corner pulley installed at each end; A lifting movable pulley is installed between the fixed lifting ring and the guide pulley on the same guide longitudinal beam, between adjacent guide pulleys, and between the corner pulley and the guide pulley. One end of the wire rope of the pulley block is fixed to a fixed lifting ring, and the middle part passes through all the guide pulleys and lifting movable pulleys that are interlaced on a guide longitudinal beam in sequence, then passes through two corner pulleys in sequence, and then passes through all the guide pulleys and lifting movable pulleys on another guide longitudinal beam in sequence, and finally is fixed to another fixed lifting ring. A lifting chain is suspended from the hook of each lifting movable pulley.

[0006] The guide beam is made of I-beams; the guide pulley is installed on the guide beam by C-shaped steel with the opening facing upward and fastening bolts, wherein the C-shaped steel is fitted on the lower end of the I-beam, so the position of the guide pulley is adjustable.

[0007] The advantages of the prefabricated component self-balancing pulley lifting device provided by this utility model are as follows: Compared with the prior art, ① the overall structure is made of steel, which is stable, simple, and easy to operate. ② The steel wire rope of the pulley group runs through all the pulleys, forming a whole. During lifting, the steel wire rope can freely adjust the height of each lifting pulley according to the force, so that all the force of the prefabricated component lifting is evenly transmitted, playing a self-balancing role and avoiding problems such as cracking and damage of prefabricated components caused by ordinary lifting devices. ③ The position of the guide pulley can be adjusted by tightening bolts, so that the position of the lifting pulley and the lifting chain can be changed to adapt to the lifting point position of different types of prefabricated components, ensuring that the force is directly transmitted, enhancing the efficiency, safety and economy of prefabricated component lifting, and playing a better role in protecting the finished product. ④ The lifting chain and the lifting pulley can be freely adjusted according to the number of lifting points on the prefabricated component. Attached Figure Description

[0008] Fig. 1 A front view of the prefabricated component self-balancing pulley lifting device provided by this utility model;

[0009] Fig. 2 Top view of the prefabricated component self-balancing pulley lifting device provided by this utility model;

[0010] Fig. 3 A side view of the structure of the prefabricated component self-balancing pulley lifting device provided by this utility model;

[0011] Fig. 4A schematic diagram of the connection between the guide hanger and the guide pulley in the prefabricated component self-balancing pulley lifting device provided by this utility model. Detailed Implementation

[0012] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0013] like Figs. 1 to 4 As shown, the prefabricated component self-balancing pulley lifting device provided by this utility model includes a guide frame 1, a lifting frame wire rope 2, a fixed lifting ring 3, a lifting movable pulley 4, a guide pulley 5, a pulley block wire rope 6, a lifting chain 7, and a corner pulley 8; wherein, the guide frame 1 is a rectangular frame composed of two guide longitudinal beams and two guide transverse beams, and is horizontally arranged; at least one lifting frame wire rope 2 is installed on the top surface of each of the two guide longitudinal beams, and multiple guide pulleys 5 are installed at equal intervals at the bottom, with fixed lifting rings 3 and corner pulleys 8 installed at both ends respectively; located on the same... A lifting movable pulley 4 is installed between the fixed lifting ring 3 on the guide longitudinal beam and the guide pulley 5, between adjacent guide pulleys 5, and between the corner pulley 8 and the guide pulley 5. One end of the steel wire rope 6 of the pulley group is fixed to a fixed lifting ring 3, and the middle part passes through all the guide pulleys 5 and lifting movable pulleys 4 that are intersected on a guide longitudinal beam in sequence, then passes through two corner pulleys 8 in sequence, and then passes through all the guide pulleys 5 and lifting movable pulleys 4 on another guide longitudinal beam in sequence, and finally is fixed to another fixed lifting ring 3. A lifting chain 7 is suspended from the hook of each lifting movable pulley 4.

[0014] The guide longitudinal beam is made of I-beams; the guide pulley 5 is installed on the guide longitudinal beam by an upward-opening C-shaped steel 10 and fastening bolts 9, wherein the C-shaped steel 10 is fitted on the lower end of the I-beam, so the position of the guide pulley 5 is adjustable.

[0015] The method of using the self-balancing pulley lifting device for prefabricated components provided by this utility model is described below:

[0016] When it is necessary to hoist precast components, the staff first observes the position and number of hoisting points on the precast components. Then, based on the number of hoisting points, they determine the number of hoisting chains 7 and hoisting pulleys 4 on this device. After that, they adjust the position of the guide pulleys 5 so that they are perpendicular to the hoisting points to reduce the horizontal error between the guide pulleys 5 and the hoisting points. Then, they use the hooks on the hoisting device to hook the wire rope 2 of the hoisting frame and connect multiple hoisting chains 7 to multiple hoisting points on the precast components. Finally, they use the hoisting device to hoist the precast components through this device and move them to the storage location.

[0017] The functions of each component in this device are as follows: the guide hanger 1 provides the main load-bearing and guiding function; the corner pulley 8 supports the wire rope 6 of the pulley block and can rotate flexibly according to the force direction of the wire rope 6 and the hook on the chain 7, thus providing a guiding function; the lifting movable pulley 4 carries the chain 7 and transmits force during lifting, and can move freely on the wire rope 6 according to the magnitude of the force; the guide pulley 5 can move precisely along the guide longitudinal beam, and its position can be adjusted to change the position of the lifting movable pulley 4, thereby adapting to different precast components. Lifting points; the wire rope 2 of the lifting frame is connected to the lifting device, allowing the force to be transmitted to the lifting device; the lifting chain 7 is in direct contact with the precast component, and the length of each lifting chain 7 is consistent with that of the wire rope, so as to ensure that the force on each lifting point is the same; the fixed lifting ring 3 serves to fix the wire rope 6 of the pulley block; the middle part of the wire rope 6 of the pulley block passes around all the guide pulleys 5 and the lifting movable pulley 4 to become a whole, which can move freely according to the force, and has sufficient length to ensure that the height of each lifting movable pulley 4 can be freely adjusted according to the force to achieve a self-balancing state.

[0018] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A self-balancing pulley lifting device for prefabricated components, characterized in that, The prefabricated component self-balancing pulley lifting device includes a guide frame (1), a frame wire rope (2), a fixed lifting ring (3), a lifting movable pulley (4), a guide pulley (5), a pulley block wire rope (6), a lifting chain (7), and a corner pulley (8); wherein, the guide frame (1) is a rectangular frame composed of two guide longitudinal beams and two guide transverse beams, and is horizontally arranged; at least one frame wire rope (2) is installed on the top surface of each of the two guide longitudinal beams, and multiple adjustable-spacing guide pulleys (5) are installed at the bottom, and fixed lifting rings (3) are installed at both ends; the fixed lifting rings (3) located on the same guide longitudinal beam are... A hoisting movable pulley (4) is set between the guide pulley (5), the adjacent guide pulley (5), the corner pulley (8) and the guide pulley (5); one end of the wire rope (6) of the pulley group is fixed on a fixed lifting ring (3), the middle part passes through all the guide pulleys (5) and hoisting movable pulleys (4) intersecting on a guide longitudinal beam, then passes through two corner pulleys (8), then passes through all the guide pulleys (5) and hoisting movable pulleys (4) on another guide longitudinal beam, and finally is fixed on another fixed lifting ring (3); a lifting chain (7) is suspended on the hook of each hoisting movable pulley (4).

2. The prefabricated component self-balancing pulley lifting device according to claim 1, characterized in that: The guide beam is made of I-beams; the guide pulley (5) is installed on the guide beam by an upward-facing C-shaped steel (10) and fastening bolts (9), wherein the C-shaped steel (10) is fitted on the lower end of the I-beam, so the position of the guide pulley (5) is adjustable.

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