CN203213018U - Lifting device for rigid hinges and large components - Google Patents

Abstract

The utility model discloses a hoisting device for a rigid hinge and a large component, which belongs to the field of bridge construction equipment and comprises a bridge deck crane winch equipped with a fixed pulley connected by a steel wire rope, a top fixed pulley block and a movable pulley block. The hoist of the crane is also provided with a fixed pulley, and the two wire rope ends of the hoist of the bridge deck crane are connected in series through the upper turn of the fixed pulley. The utility model is a hoisting device for realizing rigid hinges and large-scale components of different spreaders of bridge deck cranes, which solves the difficulty of air attitude control and single The problem that the force on the lifting point is easy to exceed the limit can reduce the risk of lifting and the difficulty of operation.

Description

Rigid hinge and lifting device for large components

technical field

The utility model belongs to the field of bridge construction equipment.

Background technique

In the past, bridge deck cranes were used to hoist steel box girders or other large structures. If abnormalities are found in the attitude of the box girder in the air and changes in the weighing system, the operator needs to manually adjust the left and right spreaders, otherwise it will easily cause excessive force on one side of the crane and overall instability.

During the hoisting process of the steel box girder, the spreader must be manually adjusted according to the attitude of the steel box girder in the air, but it is difficult to find a suitable observation point during construction, and the lifting height of the steel box girder is high, often requiring multiple left and right hoisting Tool adjustment, construction difficulty, high risk. Especially in the working condition of multiple deck cranes lifting the steel box girder at four points together, it is very likely that two lifting points on the diagonal can lift all the heavy objects, which will cause a single lifting point lifting system The capacity exceeds the design value, and the potential safety hazard is quite large.

Utility model content

The purpose of the utility model is to propose a lifting device for realizing rigid hinges of different spreaders of bridge deck cranes and large-scale components, so as to solve the problem of difficulty in aerial attitude control of bridge deck cranes during the hoisting of steel box girders or large structures. The problem that the force of a single lifting point is easy to exceed the limit reduces the risk of lifting and the difficulty of operation.

The utility model purpose is achieved through the following technical solutions:

A hoisting device for rigid hinges and large components, including a bridge deck crane winch equipped with a fixed pulley connected by a steel wire rope, a top fixed pulley block and a movable pulley block, the bridge deck crane hoist is also provided with a steering fixed pulley, two The wire rope ends of the bridge deck crane hoist are connected in series through the upper turning fixed pulley.

As a preferred manner, the hoists of the two deck cranes are left and right hoists of the same deck crane.

As a preferred manner, the hoists of the two deck cranes are hoists of different deck cranes.

As a preferred manner, the direction of the groove of the connecting fixed pulley is consistent with the pulling direction of the upper steel wire rope.

As a preferred manner, the direction of the wheel groove of the deflection fixed pulley is consistent with the pulling direction of the upper wire rope.

As a preferred manner, the fixed deflection pulley is arranged at the main truss at the rear side of the underframe of the deck crane.

As a preferred manner, the connecting fixed pulley and the steering fixed pulley are provided with a wire rope anti-detachment groove device.

As a further preferred manner, the wire rope anti-detachment device is a pulley base stop strength plate.

The working process is as follows: connect the unfixed wire rope ends of the hoist wire ropes of the original two bridge deck cranes through their respective fixed pulleys. connect. The left and right winches of existing bridge deck cranes (or the hoists of different bridge deck cranes) are two independent hoisting systems, and this device can connect the two independent systems into a whole after connecting them in series, thus for large-scale The force of the crane and the lifting stability of the structure during the hoisting of the structure have an automatic adjustment function to ensure that the hoisting force of the two cranes is balanced and the lifting process of the structure is balanced. The principle of its automatic adjustment is: the system after series connection completes the self-balancing adjustment of the force through the fixed pulley, and then because of the self-balance of the force, the attitude of the structure in the air is determined to be in a stable state. Therefore, this device connects the steel wire ropes of the left and right hoists of the bridge deck crane (or hoists of different bridge cranes) in series through the fixed pulley, so that during the lifting process of the steel box girder, the two spreaders will automatically go through the fixed pulley. Adjust the height difference between the left and right of the lifting point so that the two lifting points can balance the lifting load with each other at the same time. The two hoists connected in series are equivalent to adding a balance beam between the two lifting points to realize the self-balancing of the bridge deck crane spreader. And it solves the working condition that multiple deck cranes jointly lift the steel box girder at four points, conforms to the principle that three points determine a plane during the lifting process, and realizes "four-point lifting, three-point balance". The device is suitable for the connection of the left and right spreaders of a single crane and the connection between the spreaders of two bridge deck cranes of different models.

Beneficial effects of the utility model: when the bridge deck crane is used for hoisting steel box girders, especially when multiple cranes are used for multi-point lifting operations, the effect is particularly obvious, the construction difficulty is greatly reduced, and the safety risk is significantly reduced.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment;

Fig. 2 is the left view of Fig. 1;

Fig. 3 is the top view of Fig. 1;

Fig. 4 is a schematic diagram of wire rope winding of the present utility model;

Among them, 1 is the steering fixed pulley, 2 is the connecting fixed pulley, 3 is the top fixed pulley block, 4 is the movable pulley block, 5 is the spreader, 6 is the wire rope, 7 is the connection point of the left and right hoist wire rope, and 8 is the drum.

Detailed ways

The following non-limiting examples illustrate the invention.

Example 1:

As shown in Figures 1 to 4, a lifting device for rigid hinges and large components includes left and right winches of bridge deck cranes respectively equipped with connecting fixed pulleys 2, top fixed pulleys 3 and movable pulleys 4 connected by steel wire ropes 6 , the left and right winches of the bridge deck crane are also provided with turning fixed pulleys 1, and the wire rope 6 rope ends of the left and right winches of the bridge deck crane are connected in series by turning to the fixed pulleys on it, as shown in the figure, the connection point is 7. Connecting the fixed pulley 2 and the steering fixed pulley 1 are provided with a steel wire rope anti-detachment groove device. As a preferred mode, as shown in this embodiment, the steel wire rope detachment prevention groove device is a pulley base stop strength plate. The steering fixed pulley 1 is located at the main truss at the rear side of the bridge deck crane chassis. At the same time, the direction of the groove connecting the fixed pulley 2 is consistent with the pulling direction of the upper wire rope 6, and the direction of the groove of the steering fixed pulley 1 is also consistent with the pulling direction of the upper wire rope 6. .

Example 2:

This embodiment is basically the same as Embodiment 1, and the difference is that the hoists of the two bridge deck cranes are respectively provided with their turning fixed pulleys, and their steel wire rope ends are connected in series through the turning fixed pulleys.

The above descriptions are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present utility model shall be included in this utility model. within the scope of protection of utility models.

Claims (8)

1. the boom hoisting of rigidity hinge and large-scale component, comprise the bridge floor loop wheel machine hoist engine that is provided with the connection fixed pulley, top fixed pulley group and the running block that are connected by wire rope, it is characterized in that: described bridge floor loop wheel machine hoist engine also is provided with and turns to fixed pulley, and the wire rope end of two bridge floor loop wheel machine hoist engines is connected by turning to fixed pulley on it.

2. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component, it is characterized in that: described two bridge floor loop wheel machine hoist engines are the left and right hoist engine of same bridge floor loop wheel machine.

3. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component, it is characterized in that: described two bridge floor loop wheel machine hoist engines are the hoist engine of different bridge floor loop wheel machines.

4. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component, it is characterized in that: described connection fixed pulley race direction is consistent with rope traction direction on it.

5. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component, it is characterized in that: the described fixed pulley race direction that turns to is consistent with rope traction direction on it.

6. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component, it is characterized in that: the described fixed pulley that turns to is located at described bridge floor loop wheel machine underframe rear side main couple place.

7. the boom hoisting of rigidity as claimed in claim 1 hinge and large-scale component is characterized in that: described connection fixed pulley and turn to fixed pulley to be provided with the wire rope groove separation preventing device.

8. the boom hoisting of rigidity as claimed in claim 7 hinge and large-scale component, it is characterized in that: described wire rope groove separation preventing device is the spacing strength plate of pulley base.

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