Swing buffering and limiting device for hoisting fan

Abstract

The utility model relates to the technical field of fan installation, in particular to a hoisting fan swing buffering and limiting device which comprises a hollow sleeve, a first bolt and a second bolt. The two sides of the head of the first bolt are fixedly connected with springs respectively, the two springs and the first bolt are coaxially arranged, and one spring is coaxially arranged on a rod body of the first bolt in a sleeving mode. The hollow sleeve is arranged on the head portion of the first bolt in a sleeved mode, the two springs are both located in the hollow sleeve, the length of the hollow sleeve is equal to the sum of the length of the two springs in the natural state and the head portion of the first bolt, and the head portion of the second bolt is fixedly welded to the end, away from the first bolt, of the hollow sleeve. The outer side of a rod body of the second bolt is coaxially sleeved with a circular ring, and the circular ring and the end, away from the second bolt, of the hollow sleeve are welded together. The limiting device can protect the flexible connecting pipe from being damaged, the swing of the fan can be reduced to a great extent, and the impact on the flexible connecting pipe is reduced.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine installation technology, and in particular to a swing buffer limit device for hoisted wind turbines. Background Technology

[0002] When the hoisting boom of the fan is long, the fan will swing greatly when it starts. The flexible pipe on one side of the fan (i.e., the flexible pipe connecting the air duct and the hoisting fan) will be stretched and straightened, and the flexible pipe on the other side of the air duct will be squeezed and collided. At the same time, the fan cannot maintain a horizontal state, which will affect the service life of the fan.

[0003] Therefore, how to reduce the impact of the swing of the hoisting fan during startup on the flexible pipe has become a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a swing buffer limit device for hoisting fans, thereby solving the problem of the impact of the swing on the flexible pipe during the start-up of hoisting fans in the prior art.

[0005] A swing buffer limit device for hoisting a fan includes: a hollow sleeve, a first bolt, and a second bolt;

[0006] Springs are fixedly connected to both sides of the head of the first bolt. Both springs are coaxially arranged with the first bolt, and one of the springs is coaxially sleeved on the shank of the first bolt.

[0007] The hollow sleeve is fitted onto the head of the first bolt, and both springs are located inside the hollow sleeve. The length of the hollow sleeve is equal to the sum of the lengths of the two springs in their natural state and the head of the first bolt. The head of the second bolt is welded and fixed to the end of the hollow sleeve away from the first bolt. A ring is coaxially fitted on the outer side of the shank of the second bolt, and the ring is welded to the end of the hollow sleeve away from the second bolt.

[0008] In some embodiments, the air inlet and air outlet sides of the hoisting fan are connected to the air duct via flexible connecting pipes, and the first bolt and the second bolt are respectively fixed to the flanges on both sides of the flexible connecting pipes by nuts.

[0009] In some embodiments, each of the flexible tubes is symmetrically provided with at least one pair of the limiting devices.

[0010] In some embodiments, the length of the first bolt is greater than that of the second bolt.

[0011] In some embodiments, the inner diameter of the ring is 0.5 to 1 mm larger than the inner diameter of the screw of the first bolt.

[0012] In some embodiments, the diameter of the head of the second bolt is greater than or equal to the inner diameter of the hollow sleeve, and the second bolt is coaxially arranged with the hollow sleeve.

[0013] In some of these embodiments, the hoisted fan is fixed to the floor slab by a sling.

[0014] Compared with the prior art, this utility model provides a hoisting fan start-up swing buffer limit device. This limit device can be directly connected to the flange of the flexible pipe, which is easy to fix. It can also buffer and limit the swing of the fan through the extension and contraction of the spring, prevent the fan from tilting, and thus protect the flexible pipe from damage. It can greatly reduce the swing of the fan and reduce the impact on the flexible pipe. Attached Figure Description

[0015] The present invention, its features, shape, and advantages will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference numerals denote like parts throughout the drawings. The drawings are not drawn to scale; their purpose is to illustrate the gist of the invention.

[0016] Figure 1 This is a schematic diagram of the structure of the hoisting fan start-up swing buffer limit device in this embodiment of the utility model;

[0017] Figure 2 This is a schematic diagram illustrating the application of the hoisting fan start-up swing buffer limit device in this embodiment of the present invention;

[0018] Figure 3 for Figure 2 A magnified view of a portion of the image;

[0019] In the diagram: 1. Limiting device; 11. Hollow sleeve; 12. First bolt; 13. Second bolt; 14. Spring; 15. Ring; 2. Floor slab; 3. Hanging rod; 4. Hoisting fan; 5. Air duct; 6. Flexible connecting pipe; 7. Nut. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but this is not intended to limit the present invention:

[0021] like Figures 1-3As shown, this embodiment discloses a swing buffer limiting device 1 for a hoisted fan 4. The hoisted fan 4 is fixed to the floor slab 2 by a suspension rod 3. The air inlet and air outlet sides of the hoisted fan 4 are connected to the air duct 5 through flexible connecting pipes 6. Specifically, the limiting device 1 includes: a hollow sleeve 11, a first bolt 12, and a second bolt 13. Springs 14 are fixedly connected to both sides of the head of the first bolt 12. Both springs 14 are coaxially arranged with the first bolt 12, and one of the springs 14 is coaxially sleeved on the rod body of the first bolt 12. The hollow sleeve 11 is sleeved on the head of the first bolt 12, and both springs 14 are located inside the hollow sleeve 11. The length of the hollow sleeve 11 is equal to the length of the two springs 14 in their natural state. The length is the sum of the length of the head of the first bolt 12 (i.e., in the natural state, the ends of the two springs 14 away from the head of the first bolt 12 are located at both ends of the hollow sleeve 11). The head of the second bolt 13 is welded and fixed to the end of the hollow sleeve 11 away from the first bolt 12. A ring 15 is coaxially sleeved on the outside of the rod of the second bolt 13, and the ring 15 is welded to the end of the hollow sleeve 11 away from the second bolt 13. The ring 15 and the head of the second bolt 13 together seal both ends of the hollow sleeve 11 to seal both springs 14 inside the hollow sleeve 11. The first bolt 12 and the second bolt 13 are respectively fixed to the flanges on both sides of the flexible tube 6 by nuts 7.

[0022] In the embodiments of this utility model, each flexible tube 6 is symmetrically provided with at least one pair of limiting devices 1. The length of the first bolt 12 is greater than that of the second bolt 13. The inner diameter of the ring 15 is 0.5 to 1 mm larger than the inner diameter of the screw of the first bolt 12 to facilitate the ring 15 being fitted onto the screw of the first bolt 12. During welding, the gap between the ring 15 and the screw of the first bolt 12 can be filled with solder. The diameter of the head of the second bolt 13 is greater than or equal to the inner diameter of the hollow sleeve 11, and the second bolt 13 is coaxially arranged with the hollow sleeve 11.

[0023] Specifically, the limiting device 1 is 17cm long and is used in pairs. Each pair consists of a Ø16 hollow sleeve 11, 8cm long, two Ø14 springs 14, each 4cm long with a telescopic range of 5mm, two M8 bolts (first bolt 12 and second bolt 13, with three nuts 7), and a 16mm diameter ring 15 with a central Ø10 hole. The two springs 14 are coaxially welded to the heads of the first bolt 12, one in front of the other. The device consisting of the springs 14 and the first bolt 12 is placed inside the hollow sleeve 11. The length is equal to the length of the spring 14 in its natural state plus the thickness of the head of the first bolt 12. The head of the second bolt 13 is welded to the other end of the hollow sleeve 11. The first bolt 12 and the second bolt 13 are fixed to the flanges on both sides of the flexible pipe 6 by nuts 7 (wherein, one flange on one side of the flexible pipe 6 is connected to the air duct 5, and the other flange is connected to the hoisted fan 4, and the flanges on both sides of the flexible pipe 6 need to be drilled). In use, the threaded side of the first bolt 12 and the second bolt 13 are passed through the flanges on both sides of the flexible pipe 6 and locked with nuts 7.

[0024] Those skilled in the art should understand that variations can be implemented by combining existing technology with the above embodiments, which will not be elaborated here. Such variations do not affect the substantive content of this utility model, and will not be elaborated here.

[0025] The preferred embodiments of this utility model have been described above. It should be understood that this utility model is not limited to the specific embodiments described above. Devices and structures not described in detail herein should be understood as being implemented in a conventional manner within the art. Any person skilled in the art can make many possible variations and modifications to the technical solutions of this utility model using the disclosed methods and techniques, or modify them into equivalent embodiments with equivalent changes, without departing from the scope of the technical solution of this utility model. This does not affect the essential content of this utility model. Therefore, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of this utility model, without departing from the content of the technical solution of this utility model, still fall within the protection scope of the technical solution of this utility model.

Claims

1. A hoisting fan swing buffering and limiting device, characterized in that, Include: Hollow sleeve, first bolt and second bolt; The head of the first bolt is fixedly connected with springs on both sides, both springs are coaxially arranged with the first bolt, and one of the springs is coaxially sleeved on the rod of the first bolt; The hollow sleeve is sleeved on the head of the first bolt, and both springs are located inside the hollow sleeve, the length of the hollow sleeve is equal to the sum of the length of the two springs in natural state and the head of the first bolt, the head of the second bolt is welded and fixed on one end of the hollow sleeve away from the first bolt, the outer side of the rod of the second bolt is coaxially sleeved with a circular ring, and the circular ring is welded together with the end of the hollow sleeve away from the second bolt.

2. The hoisting fan swing buffering and limiting device according to claim 1, characterized in that, The air inlet side and the air outlet side of the hoisted fan are connected with the air pipe through the flexible pipe, and the first bolt and the second bolt are fixed on the flanges on both sides of the flexible pipe through nuts.

3. The hoisting fan swing buffering and limiting device according to claim 2, characterized in that, Each of the flexible pipes is symmetrically provided with at least one pair of limiting devices.

4. The hoisting fan swing buffering and limiting device according to claim 1, characterized in that, The length of the first bolt is greater than that of the second bolt.

5. The hoisting fan swing buffering and limiting device according to claim 1, characterized in that, The inner diameter of the circular ring is 0.5-1mm larger than that of the screw rod of the first bolt.

6. The hoisting fan swing buffering and limiting device according to claim 1, characterized in that, The diameter of the head of the second bolt is greater than or equal to the inner diameter of the hollow sleeve, and the second bolt is coaxially arranged with the hollow sleeve.

7. The hoisting fan swing buffering and limiting device according to claim 1, characterized in that, The hoisted fan is fixed on the floor through the suspender.

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