Worm gear groove butterfly valve

Abstract

The utility model relates to the related field of groove butterfly valves, in particular to a worm gear groove butterfly valve which comprises a valve body, a worm gear case, a valve plate, a valve rod, a filter screen, an arc-shaped plate, an arc-shaped sliding plate, an arc-shaped scraping plate, a guide block, a groove, a spring, a positioning plate, a bolt and the like. Through the arrangement of the filter screen and the arc-shaped scraping plate, part of impurities in a medium can be filtered through the filter screen, and when the valve plate rotates, friction is generated between the filter screen and the arc-shaped scraping plate, so that part of dirt remaining on the valve plate is scraped through the arc-shaped scraping plate, the amount of the dirt on the valve plate is reduced, the situation that the dirt fills a gap between the valve plate and the valve body is reduced, and the service life of the valve plate is prolonged. According to the worm gear groove butterfly valve, the sealing performance between the valve plate and the valve body is improved, the worm gear groove butterfly valve is closed more tightly, medium leakage is reduced, the worm gear groove butterfly valve is inconvenient to open repeatedly to clean dirt, convenience is brought to cleaning of the dirt on the valve plate, and the practicability of the groove butterfly valve is improved.

Description

Technical Field

[0001] The utility model relates to the field of groove butterfly valves, in particular to a worm gear groove butterfly valve. Background Art

[0002] The groove butterfly valve is a type of valve, especially designed for pipeline systems to achieve the control and isolation of fluids (such as water, air, steam, etc.). Its main feature is that there are groove connection ports at both ends of the valve. This design enables the valve to be quickly and conveniently installed into a pipeline system with the same groove connection, without the need for traditional threaded connections or flange connections, greatly saving installation time and space. The groove butterfly valve is divided into two types: handle groove butterfly valve and turbine groove butterfly valve. The worm gear groove butterfly valve is widely used due to its advantages of easy operation, high control precision, and strong durability.

[0003] The existing groove butterfly valves have a poor protection effect on the valve plate. After long-term use of the groove butterfly valve, dirt and impurities are likely to accumulate on the valve plate, and the accumulated dirt may fill the gap between the valve plate and the valve body, resulting in the groove butterfly valve not closing tightly, thus causing medium leakage. Moreover, the interior of the groove butterfly valve is relatively narrow, which brings inconvenience to cleaning the dirt on the valve plate and reduces the practicality of the groove butterfly valve. Summary of the Invention

[0004] Therefore, to solve the above deficiencies, the utility model provides a worm gear groove butterfly valve to solve the above technical problems.

[0005] To achieve the above purpose, the utility model adopts the following technical solutions: A worm gear groove butterfly valve includes a valve body, a worm gear box fixedly installed on the top of the valve body, and a valve plate movably installed in the valve body. The valve plate is connected to the output end of the worm gear box through a valve rod rotatably installed in the valve body. On each of the left and right ends inside the valve body, there is a filter screen. On the side of the filter screen close to the valve plate, there is an arc-shaped plate. Inside the arc-shaped plate, there are several arc-shaped sliding plates. At one end of the arc-shaped sliding plate close to the valve plate, there is an arc-shaped scraping plate, which is used to clean the dirt on the valve plate by rubbing against it when the valve plate rotates horizontally.

[0006] At the end of the arc-shaped sliding plate away from the arc-shaped scraping plate, there is a guide block. The guide block is movably inserted into a groove opened on the arc-shaped plate, and the guide block is connected to the inner side of the groove through a spring.

[0007] Preferably, a positioning plate is installed inside the valve body. The positioning plate is located between the valve plate and the filter screen, and the positioning plate is locked and fixed to the filter screen through bolts.

[0008] Preferably, the horizontal cross-section of the arc-shaped scraping plate is a circular structure, and the arc-shaped scraping plate is parallel to the valve plate.

[0009] Preferably, the arc-shaped scraping plate is made of hydrogenated nitrile butadiene rubber.

[0010] Preferably, the width of the arc-shaped plate is smaller than the inner diameter of the valve body, and the inner width of the arc-shaped plate is larger than the thickness of the valve plate.

[0011] The beneficial effects of the present utility model:

[0012] By providing a filter screen and an arc-shaped scraping plate, the present utility model can filter out some impurities in the medium through the filter screen, and when the valve plate rotates, it will rub against the arc-shaped scraping plate, so as to scrape off some dirt remaining on the valve plate through the arc-shaped scraping plate, reduce the amount of dirt on the valve plate, reduce the dirt from filling the gap between the valve plate and the valve body, which is beneficial to improving the sealing performance between the valve plate and the valve body, making the worm gear groove butterfly valve close more tightly, reducing the leakage of the medium, and it is not necessary to repeatedly open the worm gear groove butterfly valve to clean the dirt, which brings convenience to cleaning the dirt on the valve plate and improves the practicability of the groove butterfly valve. Description of the Drawings

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] Figure 2 is a schematic connection structure diagram of the bottom view section of the arc-shaped plate of the present utility model.

[0015] Wherein: valve body - 1, worm gear box - 2, valve plate - 3, valve rod - 4, filter screen - 5, arc-shaped plate - 6, arc-shaped sliding plate - 7, arc-shaped scraping plate - 8, guide block - 9, groove - 10, spring - 11, positioning plate - 12, bolt - 13. Detailed Embodiments

[0016] In order to further explain the technical solution of the present utility model, the following will be elaborated in detail through specific embodiments.

[0017] As Figure 1 shown, the present utility model provides a worm gear groove butterfly valve, including a valve body 1, a worm gear box 2 fixedly installed on the top of the valve body 1, and a valve plate 3 movably installed in the valve body 1. The valve plate 3 is connected to the output end of the worm gear box 2 through a valve rod 4 rotatably installed in the valve body 1;

[0018] Specifically, during use, the two ends of the valve body 1 are respectively connected to the external pipelines, and the worm gear box 2 can be controlled to drive the valve rod 4 to rotate, so that the valve rod 4 drives the valve plate 3 to rotate, so as to realize the closing or opening of the worm gear groove butterfly valve, thereby controlling the on-off of the medium in the pipeline.

[0019] As Figure 1 and Figure 2As shown in the figure, in this embodiment, a filter screen 5 is provided at each of the left and right ends inside the valve body 1 to filter out some impurities in the medium. An arc-shaped plate 6 is installed on the side of the filter screen 5 close to the valve plate 3. A number of arc-shaped sliding plates 7 are arranged at equal intervals inside the arc-shaped plate 6. An arc-shaped scraping plate 8 is pasted at one end of the arc-shaped sliding plate 7 close to the valve plate 3. The arc-shaped scraping plate 8 is used to clean the dirt on the valve plate 3 by rubbing against it when the valve plate 3 rotates horizontally;

[0020] A guide block 9 is installed at one end of the arc-shaped sliding plate 7 away from the arc-shaped scraping plate 8. The guide block 9 is movably inserted into a groove 10 opened on the arc-shaped plate 6, and the guide block 9 is connected to the inner side of the groove 10 through a spring 11, so that the guide block 9 drives the arc-shaped scraping plate 8 to closely adhere to the side surface of the valve plate 3 under the elastic force of the spring 11;

[0021] In this embodiment, a positioning plate 12 is installed inside the valve body 1. The positioning plate 12 is located between the valve plate 3 and the filter screen 5, and the positioning plate 12 is locked and fixed to the filter screen 5 through bolts 13 to provide positioning for the filter screen 5 and improve the stability of the filter screen 5 during use;

[0022] In this embodiment, the horizontal cross-section of the arc-shaped scraping plate 8 is a circular structure, and the arc-shaped scraping plate 8 is parallel to the valve plate 3, which is convenient for the arc-shaped scraping plate 8 to scrape the dirt on the valve plate 3 more comprehensively;

[0023] In this embodiment, the arc-shaped scraping plate 8 is made of hydrogenated nitrile rubber, which has excellent wear resistance and is also difficult to scratch the valve plate 3, and can effectively scrape the dirt on the valve plate 3;

[0024] Among them, the width of the arc-shaped plate 6 is smaller than the inner diameter of the valve body 1, and the inner width of the arc-shaped plate 6 is greater than the thickness of the valve plate 3, which prevents the arc-shaped plate 6 from hindering the flow of the medium and at the same time facilitates the side surface of the valve plate 3 to more comprehensively contact the arc-shaped scraping plate 8 inside the arc-shaped plate 6;

[0025] Specifically, during use, when the valve plate 3 rotates and opens, the medium flows inside the valve body 1. When the medium flows, some impurities in the medium are filtered out by the filter screen 5, reducing the accumulation amount of impurities on the valve plate 3. And during the process of the valve plate 3 rotating and opening, it contacts the arc-shaped scraping plate 8. The valve plate 3 continuously rotates and squeezes the arc-shaped scraping plate 8. The arc-shaped scraping plate 8 is pressed and drives the arc-shaped sliding plate 7 and the guide block 9 to move inward. The spring 11 is compressed by the pressure of the guide block 9. At this time, the arc-shaped scraping plate 8 contacts the valve plate 3. When the valve plate 3 rotates, it rubs against the arc-shaped scraping plate 8, and the arc-shaped scraping plate 8 scrapes off the dirt on the valve plate 3, so that the scraped dirt flows out with the medium flow, so as to further reduce the dirt on the valve plate 3, which is beneficial to improving the sealing performance of the connection between the valve plate 3 and the valve body 1 when the valve plate 3 is closed later.

[0026] The above are only the preferred examples of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A worm gear groove butterfly valve, comprising a valve body, a worm gear box fixed on the top of the valve body, and a valve plate movably installed in the valve body, wherein the valve plate is connected to the output end of the worm gear box by rotating a valve stem installed in the valve body; It is characterized in that A filter is provided at each of the left and right ends of the inner side of the valve body, and a curved plate is installed on the side of the filter close to the valve plate, and a plurality of curved slide plates are provided inside the curved plate. A curved scraper is installed on one end of the curved slide plate close to the valve plate, and the curved scraper is used to rub against the valve plate when the valve plate rotates horizontally to clean the dirt on the valve plate; A guide block is installed at one end of the arc-shaped slide plate away from the arc-shaped scraper plate. The guide block is movably inserted into a groove formed on the arc-shaped plate, and the guide block is connected to the inner side of the groove through a spring.

2. A worm gear groove butterfly valve according to claim 1, characterized in that: A positioning plate is installed inside the valve body, the positioning plate is located between the valve plate and the filter screen, and the positioning plate is locked and fixed with the filter screen by bolts.

3. A worm gear groove butterfly valve according to claim 1, characterized in that: The horizontal cross section of the arc scraper is a circular structure, and the arc scraper is parallel to the valve plate.

4. The worm gear groove butterfly valve according to claim 1, characterized in that: The arc scraper is made of hydrogenated nitrile rubber.

5. The worm gear groove butterfly valve according to claim 1, characterized in that: The width of the arc plate is smaller than the inner diameter of the valve body, and the inner width of the arc plate is greater than the thickness of the valve plate.

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