Variable-diameter flange hole plug

Abstract

The utility model discloses a variable-diameter flange hole plug which comprises a surrounding edge, a groove is formed in the top end of the surrounding edge, an upper control button is arranged in the groove in the top end of the surrounding edge in a sliding mode, an upper variable-diameter module is arranged on the outer side of the surrounding edge, and a lower variable-diameter module is arranged at the lower end of the surrounding edge. The lower reducing module comprises a lower control button, a second spring and a second groove body, the second groove body is formed in the lower end of the surrounding edge, the second spring is fixed to the top end of the interior of the second groove body, and the lower control button is fixed to the bottom end of the second spring. According to the size of the flange hole diameter, the lower control button is pressed, and the second spring of the lower reducing module stretches out and draws back to be matched with the flange hole; after adaptation is completed, an upper control button is rotated, and the diameter is reduced through compression of a built-in first spring in the upper reducing module; and the upper control button is reversely rotated, and the diameter is increased through extension of a first spring arranged in the upper reducing module.

Description

Technical Field

[0001] This utility model relates to the field of plugs, specifically a flange hole plug with variable diameter. Background Technology

[0002] Wind power generation converts the kinetic energy of wind into electrical energy. Wind energy is a clean and pollution-free renewable energy source. Wind power generation is characterized by being pollution-free, renewable, and technologically mature. Furthermore, wind energy reserves are enormous, making it an important component of renewable resources.

[0003] Corrosion protection of tower cylinders is an indispensable and important part of the tower cylinder manufacturing process. Among them, the hot spray zinc spraying of flanges requires that no coating layer be sprayed on the area of ​​the bolt hole gasket on the back of the flange (gasket radius + 5mm). The back of the flange (excluding the gasket area) is coated with intermediate paint and topcoat to seal the zinc layer.

[0004] In response to technical requirements, most anti-corrosion teams nowadays use externally purchased rubber plugs, selecting plugs that match the flange's bore diameter. However, different projects have different flange bore diameters, which means that rubber plugs of different specifications need to be purchased. Such customized rubber plugs generally take a long time to produce, causing great inconvenience to production.

[0005] Meanwhile, it was also found in daily use that the paint on the surface of the rubber stoppers needs to be cleaned frequently, which is time-consuming and laborious. Sometimes, forgotten rubber stoppers are difficult to remove later, causing great inconvenience to the work. Therefore, there is an urgent need for a device to solve the above problems. Utility Model Content

[0006] The purpose of this invention is to provide a flange hole plug with a variable diameter to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a variable diameter flange hole plug, including a rim, a groove at the top of the rim, an upper control button slidably disposed inside the groove at the top of the rim, an upper variable diameter module disposed on the outer side of the rim, and a lower variable diameter module disposed at the lower end of the rim. The lower variable diameter module includes a lower control button, a second spring, and a second groove. The second groove is located at the lower end of the rim, the second spring is fixed at the top of the second groove, and the lower control button is fixed at the bottom of the second spring. By pressing the lower control button, the extension and retraction of the second spring can be controlled. When the second spring is fully retracted, the lower control button is located inside the second groove. By controlling the extension and retraction of the second spring, it is suitable for flange holes of different specifications.

[0008] Preferably, the upper variable diameter module includes a first groove and a first spring. The first groove is opened on the outer side of the perimeter, and one side of the first spring is fixed on the inner wall of the first groove. When in use, rotating the upper control button will drive the wire rope to be wound on the outer side of the upper control button, squeezing and pulling the first spring to contract. When rotated in the opposite direction, the first spring will reset and extend. The extension and retraction amount of the first spring is determined by the marked scale. By controlling the extension and retraction amount of the first spring, it is suitable for flange holes of different specifications.

[0009] Preferably, the outer side of the edging is equipped with a buckle, which is used to fix the disposable cardboard to the edging during use, so that the paint will be sprayed onto the disposable cardboard. It can be replaced as needed without cleaning.

[0010] Preferably, the outer side of the upper control button is fixed to the side of the first spring away from the upper control button by a steel wire rope.

[0011] Preferably, the upper control button has a marking scale on its outer side.

[0012] Preferably, four buckles are provided and are installed at equal intervals on the outside of the perimeter.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] According to the flange hole diameter, pressing the lower control button causes the second spring of the lower diameter-changing module to extend and retract, thus adapting to the flange hole. After adaptation, rotating the upper control button compresses the built-in first spring in the upper diameter-changing module, reducing the diameter; rotating the upper control button in the opposite direction extends the built-in first spring in the upper diameter-changing module, increasing the diameter. Subsequently, a disposable cardboard is placed inside the surrounding edge and then secured with clips. After painting, the disposable cardboard can be replaced as needed. In addition, the surface of the upper control button can be marked with scales for easy and quick adaptation of other plugs. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of a variable diameter flange hole plug according to the present invention;

[0016] Figure 2 This is a cross-sectional view of a flange hole plug with a variable diameter according to the present invention;

[0017] Figure 3 This is a top view of a flange hole plug with a variable diameter according to the present invention.

[0018] In the diagram: 1. Upper control button; 2. Surrounding edge; 3. Upper diameter changing module; 4. Lower diameter changing module; 5. Lower control button; 6. Buckle; 7. Second groove; 8. Second spring; 9. First groove; 10. First spring. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] Please see Figure 1-3 This utility model provides a variable diameter flange hole plug, including a perimeter 2, with a groove at the top of the perimeter 2. An upper control button 1 is slidably disposed inside the groove at the top of the perimeter 2. An upper variable diameter module 3 is disposed on the outer side of the perimeter 2, and a lower variable diameter module 4 is disposed at the lower end of the perimeter 2. The lower variable diameter module 4 includes a lower control button 5, a second spring 8, and a second groove 7. The second groove 7 is located at the lower end of the perimeter 2. The second spring 8 is welded and fixed to the top position inside the second groove 7. The lower control button 5 is welded and fixed to the bottom position of the second spring 8. The extension and retraction of the second spring 8 can be controlled by pressing the lower control button 5. When the second spring 8 is fully retracted, the lower control button 5 is located inside the second groove 7. By controlling the extension and retraction of the second spring 8, it is suitable for flange holes of different specifications.

[0021] The upper variable diameter module 3 includes a first groove 9 and a first spring 10. The first groove 9 is located on the outer side of the perimeter 2. One side of the first spring 10 is welded and fixed to the inner wall of the first groove 9. The outer side of the upper control button 1 is fixed to the side of the first spring 10 away from the upper control button 1 by a steel wire rope. The outer side of the upper control button 1 is marked with a scale. When in use, rotating the upper control button 1 will cause the steel wire rope to wind up to the outer side of the upper control button 1, squeezing and pulling the first spring 10 to contract. When rotating in the opposite direction, the first spring 10 will return to its original position and extend. The extension and contraction amount of the first spring 10 is determined by the scale. By controlling the extension and contraction amount of the first spring 10, it is suitable for flange holes of different specifications.

[0022] Four clips 6 are installed on the outer side of the edging 2, and are installed at equal intervals on the outer side of the edging 2. In use, disposable cardboard is fixed to the edging 2 by the clips 6, so that the paint will be sprayed on the disposable cardboard. It can be replaced as needed without cleaning.

[0023] Working principle: According to the flange hole diameter, press the lower control button 5, and the second spring 8 of the lower diameter reducing module 4 will extend and retract to adapt to the flange hole; after adaptation, rotate the upper control button 1, and the diameter will decrease due to the compression of the built-in first spring 10 in the upper diameter reducing module 3; rotate the upper control button 1 in the opposite direction, and the diameter will increase due to the extension of the built-in first spring 10 in the upper diameter reducing module 3; then, prepare disposable cardboard and place it inside the edging 2, and then fix it with the buckle 6. After the painting is finished, the disposable cardboard can be replaced according to the actual situation; in addition, the surface of the upper control button 1 can be marked with scales to facilitate the quick adaptation of other plugs.

[0024] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0025] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A variable diameter flange hole plug comprising a surrounding rim (2), characterised in that: The top end of the surrounding edge (2) is provided with a groove, the top end groove of the surrounding edge (2) is internally slidably provided with an upper control button (1), the outer side of the surrounding edge (2) is provided with an upper reducing module (3), the lower end of the surrounding edge (2) is provided with a lower reducing module (4), the lower reducing module (4) comprises a lower control button (5), a second spring (8) and a second groove body (7), the second groove body (7) is provided at the lower end of the surrounding edge (2), the second spring (8) is fixed at the top end position inside the second groove body (7), and the lower control button (5) is fixed at the bottom end position of the second spring (8).

2. A variable diameter flange hole plug according to claim 1, characterized in that: The upper reducing module (3) comprises a first groove body (9) and a first spring (10), the first groove body (9) is provided at the outer side of the surrounding edge (2), and the first spring (10) is fixed on the inner side wall of the first groove body (9) on one side.

3. A variable diameter flange hole plug according to claim 2, wherein: The outer side of the surrounding edge (2) is provided with buckles (6).

4. A variable diameter flange hole plug according to claim 3, wherein: The outer side of the upper control button (1) is fixed on the side, away from the upper control button (1), of the first spring (10) through a steel wire rope.

5. A variable diameter flange hole plug according to claim 4, wherein: The outer side of the upper control button (1) is provided with a mark scale.

6. A variable diameter flange hole plug according to claim 5, wherein: The buckles (6) are provided with four equidistant buckles (6) installed on the outer side of the surrounding edge (2).

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