Frameless flexible lifting appliance

Abstract

The invention discloses a frameless flexible lifting appliance and belongs to the technical field of lifting, the frameless flexible lifting appliance comprises two lifting rods, rigid connecting pieces, flexible lifting ropes and chain hoists, the two lifting rods are respectively connected with a lifted object through the rigid connecting pieces, so that the lifted object and the two lifting rods form a rigid body, the number of the flexible lifting ropes is two, each group comprises two flexible lifting ropes, and the flexible lifting ropes are connected with the chain hoists through the rigid connecting pieces. Wherein the lower ends of the two flexible lifting ropes in one group are respectively connected to the two ends of the lifting rod, the lower ends of the two flexible lifting ropes in the other group are respectively connected with the fixed ends of the two chain hoists, the movable ends of the two chain hoists are respectively connected to the two ends of the other lifting rod, and the upper ends of the two groups of flexible lifting ropes are converged to a lifting point. The lifting appliance is a lifting appliance capable of accurately and efficiently lifting installation equipment with a dip angle, is suitable for high-precision batch installation of large radar array planes with a certain dip angle installation requirement, and improves the lifting efficiency and safety.

Description

Technical Field

[0001] The present invention relates to the technical field of hoisting, and specifically to a frameless flexible sling. Background Art

[0002] For the installation of many large radar arrays, due to the limitations of installation accuracy, structural dimensions, equipment layout, weight, and installation angle, it generally requires the assistance of a sling to complete.

[0003] Ordinary slings generally include a suspension rod, a suspension rope, a shackle, etc. The object to be hoisted is generally lifted and placed horizontally. When the center of gravity position and the placement angle of the object to be hoisted change, it is generally difficult to adjust the hoisting angle of the sling. The sling has poor adaptability to the center of gravity position, weight, etc. of the object to be hoisted, and the working efficiency is low, making it difficult to adapt to a large number of hoisting operations. How to achieve the batch installation of arrays with the same structural dimensions but different weights and center of gravity positions, and with strict requirements for installation angles and installation accuracy, and improve the installation efficiency and installation accuracy, is a major problem that similar products will inevitably encounter during hoisting.

[0004] To solve this problem, when an ordinary sling hoists a device with a certain inclination angle, it generally needs to manufacture a structural frame with a certain bevel angle, adjust the length of the suspension rope through a manual hoist, and change the installation inclination angle and position of the object to be hoisted by changing the length of the suspension rope.

[0005] This kind of frame not only has a large volume, heavy weight, high processing, manufacturing and transportation costs; but also has a large number of connection points between the sling frame and the device to be hoisted, the installation and disassembly are complex, the disassembly and assembly workload is large, and the disassembly and assembly efficiency is low; due to the existence of the structural frame of the sling, when disassembling the sling, the operator needs to climb into the sling structure frame to enter the inside of the sling, which is inconvenient to operate, has great potential safety hazards, and low efficiency.

[0006] ZL201518003473.2, an antenna array combined sling. Disclosed is a sling that can accurately and efficiently hoist a device with an inclined installation, and can also be assembled in a combined manner. The disadvantage is that when using this sling, it is necessary to manufacture a truss-type main frame, with a large frame size (about 10 m × 2 m × 3.5 m) and heavy weight (about 2 tons). It not only has a high manufacturing cost, but also requires a semi-trailer with a flatbed length of not less than 12 meters for transportation during transportation, and the long-distance transportation cost is high; at the same time, there are a large number of connection points between the sling and the array, and the installation efficiency is low; due to the existence of the frame, when disassembling the sling, personnel need to climb into the sling for disassembly, with a high risk of high-altitude operation and great operation difficulty.

[0007] CN201737587U, an antenna array lifting tool. An antenna array lifting tool is disclosed. The deficiencies of this lifting tool are basically the same. It is necessary to fabricate a truss-type frame, resulting in high manufacturing costs and transportation costs, a large number of connection points, and low installation efficiency. Due to the existence of the frame, when disassembling the lifting tool, personnel need to climb into the lifting tool for disassembly, with high risks in high-altitude operations and great operational difficulties. At the same time, this lifting tool also requires counterweights, with great operational difficulties and complex hoisting operations. Summary of the Invention

[0008] The present invention overcomes the disadvantages in the prior art, such as the need to fabricate a structural frame with a certain inclination angle, low disassembly and assembly efficiency, and high safety hazards in high-altitude disassembly and assembly. The present invention provides a lifting tool capable of accurately and efficiently hoisting equipment installed with an inclination angle, and provides a frameless flexible lifting tool. The technical solution is as follows.

[0009] A frameless flexible lifting tool includes a suspension rod, a rigid connecting piece, flexible suspension ropes, and a manual hoist. There are two suspension rods, which are respectively connected to the object to be lifted through rigid connecting pieces, so that the object to be lifted and the two suspension rods form a rigid body. There are two groups of flexible suspension ropes, with two ropes in each group. The lower ends of one group of two flexible suspension ropes are respectively connected to both ends of the suspension rod, and the lower ends of the other group of two flexible suspension ropes are respectively connected to the fixed ends of two manual hoists. The movable ends of the two manual hoists are then respectively connected to both ends of the other suspension rod. The upper ends of the two groups of flexible suspension ropes converge to the lifting point.

[0010] Further, the rigid connecting piece is a stud.

[0011] Further, when the suspension rod, the object to be lifted, the flexible suspension ropes, and the manual hoist are in the hoisting state, they form a three-dimensional triangular structure.

[0012] Further, the suspension rod is in the shape of an I-beam.

[0013] Further, there are two lifting rings at both ends of the suspension rod, and the flexible suspension ropes are fixed on the lifting rings.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) According to the structural form of the radar array, combined with requirements such as the installation inclination angle, the weight and center of gravity position of the object to be installed, and the transportation conditions, the present invention designs a frameless flexible sling. This sling adopts a frameless flexible design, has an angle adjustment function, and is suitable for the batch installation of radar arrays with a certain inclination angle. (2) By simplifying the structural form of the traditional sling, the present invention simplifies the truss structure of the traditional sling into two I-shaped hanging rods, greatly reducing the manufacturing cost. The inclination angle and attitude are adjusted by hoists and flexible sling ropes. The size and weight of the sling are greatly reduced, and the structure is simpler. During transportation, no independent transportation unit is required, and it can be transported together with the product accessories, making it more convenient to use and transport, and with low transportation costs. (3) In terms of the connection method between the sling and the equipment to be lifted, the present invention uses screws to connect the array surface and the crossbeam sling. The number of connection points is greatly reduced. At the same time, the connection point interface adopts a special-shaped design, avoiding the antenna units on the object to be lifted. The connection between the sling and the array surface can be achieved without disassembling the antenna units, making the installation and disassembly convenient and with high disassembly and assembly efficiency. (4) The present invention adopts a flexible design and a frameless truss structure. When disassembling the sling, it will not affect the movement of the maintenance ladder. The maintenance ladder can be moved to any position that needs to be disassembled as required, avoiding the operator from climbing into the sling for elevated work, which is convenient to operate and has high safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the working state of the sling; Figure 2 is a schematic diagram of the working state of the sling connecting the object to be lifted.

[0016] Among them, 1 is the crossbeam, 2 is the stud, 3 is the flexible sling rope, 4 is the hoist, and 5 is the object to be lifted. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0017] The technical solution of the present invention will be further explained below in conjunction with the drawings.

[0018] As Figure 1 shown, a frameless flexible sling of the present invention includes main components such as a crossbeam 1, a stud 2, a flexible sling rope 3, and a hoist 4.

[0019] The hanging rod 1 is of an I-shaped structure. A single hanging rod 1 is connected to the object to be lifted through 4 studs 2. The interfaces of the studs 2 with the hanging rod 1 and the object to be lifted adopt a special-shaped layout, avoiding the antenna units on the object to be lifted. The connection between the sling and the array surface can be achieved without disassembling the antenna units, making the installation and disassembly convenient and with high disassembly and assembly efficiency. It solves the problem that the surface of the object to be lifted cannot directly install lifting points, and the strength cannot meet the requirements when directly installing lifting points.

[0020] After the main object to be lifted (antenna), flexible lifting ropes 3 and manual hoists 4 are externally hung on the suspension rod 1, a three-dimensional triangular structure is formed in the lifting state, and its function is equivalent to that of a traditional truss structure. The inclination angle of the inclined plane of the object to be lifted is the same as that of the equipment to be installed, ensuring the installation angle and improving the installation accuracy and efficiency.

[0021] The manual hoist 4 is used to adjust the inclination angle of the object to be lifted and is applicable to the installation of objects to be lifted with the same structural form but different weights and center-of-gravity positions. This enables the lifting tool to adapt to objects to be lifted with different weights and center of gravity.

[0022] After the object to be lifted is installed and the lifting tool is disassembled, since the lifting ropes 3 and the manual hoist 4 are flexible components, they do not affect the movement of the maintenance ladder. The maintenance ladder can be moved to any position where disassembly is required, avoiding the need for operators to climb into the lifting tool for working at heights. The operation is more convenient and the safety is higher.

[0023] During transportation, the lifting ropes 3, hoists 4, studs 2, etc. are placed in the packing box, and the suspension rod 1, packing box, etc. can be transported together with the product accessories, without the need for an independent lifting tool transportation unit.

Claims

1. A frameless flexible sling, characterized in that: It includes suspension rods, rigid connectors, flexible suspension ropes, and manual hoists. There are two suspension rods, which are respectively connected to the object to be lifted through rigid connectors, so that the object to be lifted and the two suspension rods form a rigid body. There are two groups of flexible suspension ropes, with two ropes in each group. The lower ends of the two flexible suspension ropes in one group are respectively connected to the two ends of the suspension rod, and the lower ends of the two flexible suspension ropes in the other group are respectively connected to the fixed ends of the two manual hoists. The movable ends of the two manual hoists are then respectively connected to the two ends of the other suspension rod. The upper ends of the two groups of flexible suspension ropes converge at the lifting point.

2. The frameless flexible sling according to claim 1, wherein: The rigid connector is a stud.

3. The frameless flexible sling according to claim 1, wherein: The suspension rods, the object to be lifted, the flexible suspension ropes, and the manual hoists form a three-dimensional triangular structure in the lifting state.

4. The frameless flexible sling according to claim 1, characterized in that: The suspension rod is in the shape of an I-beam.

5. The frameless flexible sling according to claim 4, wherein: There are two lifting rings at both ends of the suspension rod, and the flexible suspension ropes are fixed on the lifting rings.

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