Extra-large-specification lifting steel wire rope opposite-pulling rope winding device

Abstract

The utility model relates to an oversized hoisting steel wire rope opposite-pulling rope winding device which comprises a hoisting mechanism, a loading trolley, a lifting hook pulley block, a fixed pulley I, a fixed pulley II, a ground rope winding device and a pressing plate, the hoisting mechanism, the loading trolley, the fixed pulley I and the fixed pulley II are installed on a tower crane, and the loading trolley is fixedly locked on an arm root. The ground rope winding device is arranged on the ground, the steel wire rope is pre-wound on the hoisting mechanism, the steel wire rope sequentially penetrates through the fixed pulley I, the fixed pulley II and the load-carrying trolley, and a rope head of the steel wire rope is pulled to the outer side of the rope barrel through a steel wire rope mounting hole of the ground rope winding device. The rope head is fixed through the pressing plate. The steel wire rope is tensioned through the self tension of the mechanism, the pre-tightening force is visually displayed through the multiplying power of the steel wire rope and the weight of the counter weight, the steel wire rope is protected to the maximum degree, meanwhile, the preset pre-tightening force requirement is met, and it is guaranteed that the super-large-specification steel wire rope is not disordered in use.

Description

Technical Field

[0001] The utility model relates to a pulling and winding device for a super-large lifting steel wire rope, belonging to the technical field of tower cranes. Background Art

[0002] With the expansion of the application field of tower crane lifting equipment, it has developed from the original engineering construction, wind power installation and other industries to bridges, nuclear power and other directions. The lifting capacity demand has also developed from a few tons to hundreds of tons. The maximum lifting torque of tower crane equipment has reached tens of thousands of tons, and the maximum lifting capacity is more than 400 tons. A single wire rope can withstand tens of tons of tension. The pre-tensioning force of the wire rope during rope winding has also reached the level of more than ten tons, which is far beyond the capacity of the pre-tensioning device of the lifting wire rope of ordinary conventional tower cranes.

[0003] The specifications of the hoisting wire rope of conventional tower cranes are mainly Φ30 and below. During the pre-tightening process, the wire rope itself and the contacting objects, such as guide wheels, nylon blocks, etc., generate relative sliding resistance to achieve the purpose of wire rope winding with pre-tightening force. The final pre-tightening force generated by the wire rope can be fed back by sensors and other devices. The rope barrel wrapped with the wire rope is first fixed on the bracket, and the rope outlet position should comply with the same direction principle. After the released wire rope head passes through the guide wheel or other pre-tightening devices (including detection devices) that can assist in generating friction resistance and other pre-tightening forces, it reaches the mechanism and is fixed in the corresponding position. Such devices can realize the pre-tightening of conventional wire ropes and the winding of large-sized wire ropes with low pre-tightening force requirements. However, when using super-large wire ropes, especially super-large wire ropes used in super-large tower cranes, the pre-tightening force can even reach 30% of the lifting capacity. Relying solely on the above-mentioned pre-tightening method, on the one hand, it cannot meet the pre-tightening force requirements. Even if the extreme method is adopted to achieve a higher friction force, there is a risk of crushing or scratching the wire rope. Summary of the invention

[0004] In order to solve the demand for high pre-tensioning force winding of super-large tower crane's super-large lifting wire rope, the utility model provides a super-large lifting wire rope tensioning and winding device, which breaks through the bottleneck of friction and the risk of wire rope wear, and the pre-tensioning force can be intuitively detected and implemented, effectively guaranteeing the design and construction needs.

[0005] The utility model is realized through the following technical scheme: a super-large-size lifting wire rope pulling and winding device, comprising a lifting mechanism, a load trolley, a hook pulley block, a fixed pulley I, a fixed pulley II, a ground rope winding device and a pressure plate, wherein the lifting mechanism, the load trolley, the fixed pulley I and the fixed pulley II are installed on a tower crane, the load trolley is fixedly locked on the arm root, the hook pulley block is connected to the load trolley, a counterweight is arranged on the hook pulley block, the ground rope winding device is arranged on the ground, the wire rope is pre-wound on the lifting mechanism, the wire rope passes through the fixed pulley I, the fixed pulley II and the load trolley in sequence, the rope head of the wire rope is pulled to the outside of the rope barrel through the wire rope installation hole of the ground rope winding device, and the rope head is fixed by the pressure plate.

[0006] The hook pulley block uses a steel wire rope or a sling to hang the counterweight.

[0007] The load-carrying trolley is fixedly locked on the arm root through a guide chain and an arm frame.

[0008] The beneficial effects of the utility model are: the wire rope is tensioned by the tension of the mechanism itself, and the pre-tightening force can be intuitively displayed through the wire rope ratio and the weight of the counterweight, which protects the wire rope to the greatest extent while achieving the pre-tightening force requirements predetermined by the design, ensuring that the oversized wire rope will not become tangled during subsequent use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The utility model is further described below based on the drawings and embodiments.

[0010] Figure 1 It is a structural principle diagram of the utility model.

[0011] In the figure: 1. lifting mechanism; 2. load-carrying trolley; 3. hook pulley block; 4. fixed pulley I; 5. fixed pulley II; 6. ground rope winding device; 7. pressure plate; 8. tower crane; 9. counterweight; 10. wire rope. DETAILED DESCRIPTION

[0012] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0013] In the description of the present utility model, it should be noted that the orientation or position relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present utility model; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0014] like Figure 1 The device for pulling and winding a super-large lifting wire rope shown in the figure comprises a lifting mechanism (1), a load trolley (2), a hook pulley block (3), a fixed pulley I (4), a fixed pulley II (5), a ground rope winding device (6) and a pressure plate (7). The lifting mechanism (1), the load trolley (2), the fixed pulley I (4) and the fixed pulley II (5) are installed on a tower crane (8). The load trolley (2) is fixedly locked on the arm root. The hook pulley block (3) is connected to the load trolley (2), a counterweight (9) is arranged on the hook pulley block (3), a ground rope winding device (6) is arranged on the ground, a wire rope (10) is pre-wound on the lifting mechanism (1), the wire rope (10) passes through the fixed pulley I (4), the fixed pulley II (5) and the load trolley (2) in sequence, the rope end of the wire rope (10) is pulled to the outside of the rope barrel through the wire rope installation hole of the ground rope winding device (6), and the rope end is fixed by the pressure plate (7).

[0015] The hook pulley block (3) uses a steel wire rope or a sling to hang the counterweight (9).

[0016] The load-carrying trolley (2) is fixedly locked to the arm root via a guide chain and the arm frame.

[0017] The use of the utility model:

[0018] Pre-winding of the wire rope: This part needs to be implemented on the ground before the lifting mechanism 1 is installed on the tower crane 8. The wire rope 10 is wound onto the lifting mechanism 1 from the incoming state with the help of the rope barrel frame. When the wire rope 10 is from the rope barrel to the lifting mechanism 1, the wire rope 10 is arranged tightly on the lifting mechanism 1 without obvious flash seams or rope compression, ensuring that no tangled ropes will occur during subsequent pulling down.

[0019] Pulling down the wire rope: This part requires pulling down the wire rope 10 from the lifting mechanism 1 to the ground rope winding device 6 on the ground. This needs to be done after the lifting mechanism 1 is installed on the tower crane 8.

[0020] a. The load-carrying trolley 2 moves to the arm root, and after being fixed and locked with the guide chain and the arm frame, the tooling support is used to completely remove the hook except the pulley block 3. When removing the casting rope head of the lifting wire rope, use a traction rope to connect it, and the other end is connected to the traction vehicle, and the rope is slowly released until it falls to the ground for protection;

[0021] b. Use a forklift or tractor to assist and slowly pull the wire rope end from the load-carrying trolley 2 downwards. Note that the process must be done slowly and the dynamics of the wire rope 10 must be observed at all times to prevent contact or collision with other objects;

[0022] c. Pull the end of the wire rope through the wire rope installation hole of the ground rope winding device 6 to the outside of the rope barrel, and observe whether there are sharp points at the contact position with the wire rope 10. If there are any, they need to be polished and cleaned or replaced with T5 thick rubber pads, and the rope end is fixed with the pressure plate 7 of the lifting mechanism to ensure that the rope end does not interfere with the mechanism during movement;

[0023] d. Use wire rope or sling to hang a certain weight of counterweight on the lower side of the hook pulley block 3. Generally, a single wire rope is selected to bear 1~2t (if the wire rope has N multiples, the weight of the counterweight to be hoisted needs to be multiplied by the multiple N);

[0024] e. After the preparation is completed, check all connections. If they meet the requirements, turn on the power, use low speed to test the rope winding, and check the rope winding conditions of the upper lifting mechanism 1, each device and the spare mechanism;

[0025] f. When there are no abnormalities, start the ground rope winding device 6 and the upper lifting mechanism 1 in gear I. At this time, you can see that the counterweight 9 is pulled up and the height from the ground is about 0.3~1m. After completing the first round of wire rope winding, stop the last rotation of the lifting mechanism 1 and the lower ground rope winding device 6, and check the wire rope winding situation. Continue winding if the design requirements are met. When there are 1~2 rounds left in the upper lifting mechanism, stop the lifting mechanism 1 and the ground rope winding device 6.

[0026] Wire rope pull-up:

[0027] The layout at this time is consistent with the pull-down of the steel wire rope, and the direction of the steel wire rope 10 is opposite to the pull-down.

[0028] a. Check all connections and power supplies, and adjust the counterweight 9 to the required counterweight, that is, the required preload of a single steel wire rope multiplied by the ratio N of the steel wire rope pulled up at this time, to provide the predetermined preload;

[0029] b. Start the hoisting mechanism 1 and the ground rope winding device 6 on the tower crane in gear I in sequence, pull up the bottom surface of the counterweight 9 on the lower side of the hook to about 0.3-1m from the ground, complete the second round of trial rope winding operation, check the connection of each electrical appliance, the status of the counterweight and the status of the hoisting mechanism 1 and the ground rope winding device 6 again, and continue to wind the rope after checking that the requirements are met;

[0030] c. During the process, it is necessary to constantly observe the winding state of the wire rope of the hoisting mechanism 1 on the upper side of the tower crane. If there is a gap in the arrangement, the command personnel should be notified in time, the mechanism should be stopped, and rectangular wood should be used for manual intervention and correction to ensure that the wire rope is tightly wound. After the abnormality is eliminated, the rope winding operation can be continued;

[0031] d. Continue to wind the rope if the design requirements are met. When there is one circle of wire rope left in the ground winding device 6, stop the lifting mechanism 1 and the ground winding device 6;

[0032] e. Remove the fixing of the pouring rope head, where the lifting mechanism 1 slowly pulls the remaining wire rope to the position of the hook pulley block 3;

[0033] f. Connect the trolley, hook, etc. of the wire rope 10 according to the on-site requirements;

[0034] h. Clean up the site, restore all items to their original state, and return borrowed items to their original location after cleaning.

[0035] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A super-large lifting wire rope pulling and winding device, characterized in that: The invention comprises a lifting mechanism (1), a load trolley (2), a hook pulley block (3), a fixed pulley I (4), a fixed pulley II (5), a ground rope winding device (6) and a pressure plate (7). The lifting mechanism (1), the load trolley (2), the fixed pulley I (4) and the fixed pulley II (5) are installed on a tower crane (8). The load trolley (2) is fixedly locked on the arm root. The hook pulley block (3) is connected to the load trolley (2). A counterweight (9) is arranged on the hook pulley block (3). The ground rope winding device (6) is arranged on the ground. A steel wire rope (10) is pre-wound on the lifting mechanism (1). The steel wire rope (10) passes through the fixed pulley I (4), the fixed pulley II (5) and the load trolley (2) in sequence. The rope end of the steel wire rope (10) is pulled to the outside of the rope barrel through the steel wire rope installation hole of the ground rope winding device (6), and the rope end is fixed by the pressure plate (7).

2. The device for pulling and winding a super-large lifting wire rope according to claim 1 is characterized in that: The hook pulley block (3) uses a steel wire rope or a sling to hang the counterweight (9).

3. The device for pulling and winding a super-large lifting wire rope according to claim 1 is characterized in that: The load-carrying trolley (2) is fixedly locked to the arm root via a guide chain and the arm frame.

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