Motion power transmission device of wind-proof and anti-freezing cloth curtain of air cooling island

Abstract

The utility model discloses a motion power transmission device of an air cooling island wind-shielding anti-freezing cloth curtain, which solves the problem that a plurality of sets of anti-freezing cloth curtains are driven by using the same power and transmission mechanism, and the stroke termination positions of the anti-freezing cloth curtains are different. The steel wire rope winding mechanism comprises a mechanism frame body, a steel wire rope driving roller, a steel wire rope driven wheel and a steel wire rope, the steel wire rope driving roller and the steel wire rope driven wheel are arranged in parallel, and the steel wire rope winds between the steel wire rope driving roller and the steel wire rope driven wheel to form axially progressive 8-shaped winding. The surface of a cylinder of the steel wire rope driving roller is provided with a material attachment increasing and decreasing adjusting component which is in a strip shape and is arranged in the axis direction of the steel wire rope driving roller. If the stroke termination positions of a plurality of anti-freezing cloth curtains are different and need to be processed, the material increasing and decreasing attachment adjusting part is attached to the surface of the steel wire rope driving roller or removed, the circumference of the steel wire rope driving roller can be changed, and the stroke termination positions of the anti-freezing cloth curtains fixed to the steel wire rope can be adjusted.

Description

Technical Field

[0001] This utility model relates to a transmission mechanism for a windproof and antifreeze curtain on an air-cooled island of a thermal power generator set. Background Technology

[0002] In northern regions, coal-fired power generating units use air-cooled islands to cool the turbine exhaust. During cold winter months, to prevent icing and cracking of the condenser tube bundles, insulation measures are implemented. This includes installing anti-freeze curtains at the fan inlet, which can be controlled to completely cover the fan inlet or adjust its opening as needed.

[0003] Patent application CN210892851U discloses a "Power transmission device for an automatic windbreak and antifreeze system in an air-cooled island." For example... Figures 1 to 5 As shown, both the drive pulley 21 and the driven pulley 22 of this patent have several rope grooves 24. The wire rope 23 is inserted and assembled from the driven pulley 22 to the drive pulley 21, connected diagonally, and wound in a figure-eight pattern. After several turns, it is connected to the guide pulley. The structure of the wire rope wound in a figure-eight pattern within the rope grooves solves the risk of wire rope slippage and potential cross-bracing between wire ropes, improving the reliability of the wire rope transmission. Patent application CN115853982 A discloses a power transmission mechanism for an air-cooled island windbreak device. This patent simplifies the structure of the driven pulley by eliminating the rope grooves, similarly solving the problems of wire rope slippage and cross-bracing between wire ropes.

[0004] However, the problems with the aforementioned existing technologies are as follows: Figure 1 As shown, the diameter of the fan inlet 3 is approximately 10 meters. Covering this inlet requires three or more parallel, independently installed curtains. Wider curtains are placed on the sides, and narrower curtains are placed in the middle. The travel distances of the larger and smaller curtains are not the same. This inconsistent travel distance leads to another problem: when using one power mechanism 1 and transmission mechanism 2 to drive the three antifreeze curtains, the distances between the three curtains and the edge of the fan inlet at their endpoints are inconsistent, resulting in inconsistent seam gaps. Although the inconsistency in the travel distance of each curtain can be reduced by changing the design ratio between the wire rope drive pulley 21 and the wire rope driven pulley 22, errors between the design dimensions and the actual working conditions still exist. At the equipment installation site, the termination positions of each curtain always show precision errors, some reaching approximately 100 millimeters. The gaps caused by the inconsistent distances between the three antifreeze curtains and the edge of the fan inlet at their endpoints affect the antifreeze control effect. Utility Model Content

[0005] The purpose of this utility model is to provide a motion transmission device for the windproof and antifreeze curtain of an air-cooled island, so as to solve the problem that the stroke termination position of each antifreeze curtain is different when using the same power mechanism and transmission mechanism to drive the movement of multiple sets of antifreeze curtains.

[0006] It includes a frame 20, a wire rope drive drum 21B, a wire rope driven wheel 22, and a wire rope 23. The wire rope drive drum 21B and the wire rope driven wheel 22 are arranged parallel to each other, and the wire rope 23 winds around the wire rope drive drum 21B and the wire rope driven wheel 22 to form an axially progressive figure-eight winding. The ends of the rotating shafts of the wire rope drive drum 21B and the wire rope driven wheel 22 are mounted on the frame 20 to form a rotational engagement with them. An additive or subtractive material attachment adjustment component 100 is provided on the cylindrical surface of the wire rope drive drum 21B. The additive or subtractive material attachment adjustment component 100 is strip-shaped and arranged along the axial direction of the cylindrical surface of the wire rope drive drum 21B.

[0007] With this setup, if multiple antifreeze curtains have different travel termination positions and need to be addressed, the material attachment adjustment component 100 can be attached to the surface of the wire rope drive roller 21B, or replaced or removed from its original state. This changes the circumference of the wire rope drive roller 21B, thus altering the length of the wire rope 23 wound around it. Consequently, the travel termination position of the antifreeze curtains fixed to the wire rope 23 can be adjusted, resolving the issue of different travel termination positions when multiple antifreeze curtains are driven by the same power mechanism 1 and transmission mechanism 2. Attached Figure Description

[0008] Figure 1 A schematic diagram of the existing technology installed at the fan inlet of the air-cooled island; Figure 2 A side view of the prior art; Figure 3 This is a three-dimensional structural diagram of the prior art; Figure 4 This is a three-dimensional structural diagram of a transmission mechanism in the prior art; Figure 5 This is a top view of the transmission mechanism in the prior art; Figure 6 This is a schematic diagram of the structure of this utility model; Figure 7 yes Figure 6 Side view; Figure 8 This is a three-dimensional structural schematic diagram of the material attachment adjustment component 100 in this utility model; Figure 9 This is a three-dimensional structural diagram of the wire rope drive drum; Figure 10 yes Figure 8 AA section view in the middle; Figure 11 yes Figure 9 BB section view in the middle.

[0009] The reference numerals in the attached drawings are explained as follows: 1. Power mechanism; 2. Transmission mechanism; 3. Fan outlet; 4. Track device; 5. Tension adjustment device; 6. Windproof curtain device; 11. Gear motor; 12. Transmission block; 13. First transmission rod; 14. Second transmission rod; 15. Third transmission rod; 16. Gearbox output shaft; 17. Gearbox bracket; 20. Mechanism frame; 21. Wire rope drive pulley; 21B. Wire rope drive drum; 22. Wire rope driven pulley; 23. Wire rope; 24. Rope groove; 30. Wire rope lifting guide pulley; 100. Material attachment adjustment component; 100-1 Threaded through hole; 100-2. Threaded bottom hole; 100-3. Countersunk screw. Detailed Implementation

[0010] To make the invention objectives, features, and advantages of this utility model more apparent and understandable, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0011] Specific implementation method one: Combining Figure 6 and Figure 7 This embodiment includes a frame 20, a wire rope drive drum 21B, a wire rope driven pulley 22, and a wire rope 23. The wire rope drive drum 21B and the wire rope driven pulley 22 are arranged parallel to each other, and the wire rope 23 winds around the wire rope drive drum 21B and the wire rope driven pulley 22 in an axially progressive figure-eight shape. The ends of the rotation shafts of the wire rope drive drum 21B and the wire rope driven pulley 22 are mounted on the frame 20 and rotate in cooperation with them. A material attachment adjustment component 100 is provided on the cylindrical surface of the wire rope drive drum 21B. The material attachment adjustment component 100 is strip-shaped and arranged along the axial direction of the cylindrical surface of the wire rope drive drum 21B. The material attachment adjustment component 100 has the same shape in any cross-section.

[0012] The driven pulley 22 of the wire rope has several rope grooves 24, the diameter of which is adapted to the diameter of the wire rope 23. The two ends of the wire rope 23 are connected together to form a closed loop. A wire rope lifting guide pulley 30 is coaxially arranged with the driven pulley 22. During operation, the driven pulley 21B of the wire rope is connected to the power input, and the driven pulley 22 is connected to the windproof curtain device. Figure 6 and Figure 7As shown, a wire rope lifting guide wheel 30 is coaxially arranged with the wire rope driven pulley 22. The wire rope 23 is wound around the upper half edge of the wire rope lifting guide wheel 30, then from the upper half edge of the wire rope driving drum 21B to its lower half edge, and finally back to the wire rope driven pulley 22. This ensures that the rotation direction of the wire rope lifting guide wheel 30 is the same as the rotation direction of the wire rope driving drum 21B, but opposite to the rotation direction of the wire rope driven pulley 22. The purpose of setting up the wire rope lifting guide wheel 30 is to lift the section of wire rope 23 wound on it to a height that is flush with and parallel to the section of wire rope wound on the wire rope driven pulley 22.

[0013] The wire rope drive drum 21B, the wire rope driven pulley 22, and the wire rope lifting guide pulley 30 are all located on one side of the track device 4. On the other side of the track device 4, guide wheels and a wire rope tension adjustment device 5 are provided, allowing the wire rope 23 to travel within a closed groove and rope transmission mechanism. The windbreak curtain is fixed to the wire rope 23 and moves with the movement of the wire rope 23.

[0014] The transmission mechanism is divided into two sets, which serve as the driving device for an antifreeze curtain. All transmission mechanisms are driven by a motor and a reducer through a transmission rod.

[0015] Specific Implementation Method Two: Combining Figure 8 and Figure 9 , Figure 10 , Figure 11 This embodiment differs from Embodiment 1 in that the cross-section of the material attachment adjustment component 100 is rectangular. A threaded through hole 100-1 is formed between the upper and lower surfaces of the material attachment adjustment component 100. At least two threaded through holes 100-1 are located at both ends of the material attachment adjustment component 100 along its length. Threaded bottom holes 100-2 are provided at corresponding positions on the surface of the wire rope drive drum 21B. Countersunk screws 100-3 are screwed through and engaged in the threaded through holes 100-1 and threaded bottom holes 100-2 to fix the material attachment adjustment component 100 to the wire rope drive drum 21B. This embodiment allows for convenient fixing or removal of the material attachment adjustment component 100 via a threaded connection.

[0016] Preferably, the cross-section of the material attachment adjustment component 100 is trapezoidal, which allows the wire rope 23 to smoothly transition onto the drum surface of the wire rope drive drum 21B, thereby improving the stability of the winding.

[0017] Alternatively, the material attachment adjustment component 100 can be fixed to the surface of the wire rope drive drum 21B by welding. The attached material attachment adjustment component 100 can be removed by cutting.

[0018] Specific Implementation Method Three: The difference between this implementation method and Implementation Method One is that the cross-section of the material attachment adjustment component 100 is circular, and the material attachment adjustment component 100 is welded to the surface of the wire rope drive drum 21B. When the difference in the end position of the stroke of each antifreeze curtain is small, a standard welding rod core or other steel wire of similar diameter can be selected as the material attachment adjustment component 100 to finely adjust the circumference of the wire rope drive drum 21B.

[0019] The present invention has been disclosed above with reference to preferred embodiments, but it is not intended to limit the present invention. Any simple modifications, equivalent changes and alterations made by those skilled in the art to the above embodiments without departing from the technical solution of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A motion transmission device for an air-cooled island windproof and antifreeze curtain, comprising a frame (20), a wire rope drive drum (21B), a wire rope driven wheel (22), and a wire rope (23). The wire rope drive drum (21B) and the wire rope driven wheel (22) are arranged parallel to each other, and the wire rope (23) winds around the wire rope drive drum (21B) and the wire rope driven wheel (22) to form an axially progressive figure-eight winding. The ends of the rotating shafts of the wire rope drive drum (21B) and the wire rope driven wheel (22) are mounted on the frame (20) to form a rotational engagement with them. The device is characterized in that: The surface of the steel wire rope drive drum (21B) is provided with a material attachment adjustment component (100), which is strip-shaped and arranged along the axial direction of the surface of the steel wire rope drive drum (21B).

2. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, characterized in that: The material attachment adjustment component (100) has the same shape in any cross-section.

3. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, characterized in that: The driven pulley (22) of the wire rope is provided with several rope grooves (24).

4. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, 2 or 3, characterized in that: The cross-section of the material attachment adjustment component (100) is rectangular. A threaded through hole (100-1) is opened through the upper and lower surfaces of the material attachment adjustment component (100). At least two threaded through holes (100-1) are set at the two ends of the material attachment adjustment component (100) in the length direction. A threaded bottom hole (100-2) is set at the corresponding position on the surface of the wire rope drive drum (21B). A countersunk screw (100-3) is screwed through and engaged in the threaded through hole (100-1) and the threaded bottom hole (100-2) to fix the material attachment adjustment component (100) on the wire rope drive drum (21B).

5. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, 2 or 3, characterized in that: The material attachment adjustment component (100) is fixed to the surface of the wire rope drive drum (21B) by welding, and the attached material attachment adjustment component (100) is removed by cutting.

6. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, characterized in that: The cross-section of the material attachment adjustment component (100) is circular.

7. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, characterized in that: The cross-section of the material attachment adjustment component (100) is trapezoidal.

8. The motion transmission device for the air-cooled island windproof and antifreeze curtain according to claim 1, characterized in that: A wire rope lifting guide wheel (30) is coaxially arranged with the wire rope driven wheel (22). The wire rope (23) is wound around the upper half edge of the wire rope lifting guide wheel (30) and then from the upper half edge of the wire rope driving drum (21B) to its lower half edge, and finally wound back to the wire rope driven wheel (22).

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