Ceramic ball valve convenient to operate

Abstract

The utility model discloses a ceramic ball valve convenient to operate, which relates to the technical field of ball valves and comprises a lower valve body and a valve core, an upper valve body is mounted above the lower valve body through bolts, flanges are connected to two ends of the lower valve body, a valve rod is mounted on the inner side of the upper valve body and the inner side of the lower valve body through bearings, and the valve core is connected to one end of the valve rod. According to the ceramic ball valve convenient to operate, firstly, the hand wheel is rotated to drive the valve rod to rotate, meanwhile, the valve rod drives the rotating disc to rotate, then the valve rod drives the valve element to rotate to open or close the ceramic ball valve, then the handle is rotated to drive the two-way screw to rotate, the limiting blocks are in threaded engagement with the two-way screw, and the limiting blocks are close to each other on the outer side of the two-way screw; and one end of the limiting block is inserted into the limiting hole of the turntable to limit the position of the turntable and further limit the rotation of the valve rod, so that the hand wheel can be prevented from loosening and rotating to drive the valve core to rotate, and the stability of the ceramic ball valve is improved while the operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a ceramic ball valve with convenient operation. Background Technique

[0002] A ceramic ball valve is a special type of valve. Its valve core and sealing surface are made of ceramic materials, having excellent corrosion resistance, wear resistance and high temperature resistance. The main components of a ceramic ball valve include a valve body, a valve cover, a valve stem, a valve ball and a seal, etc. Among them, the valve ball and the valve seat are usually made of ceramic materials, such as alumina ceramics, silicon carbide ceramics, etc. Due to their high hardness, wear resistance, corrosion resistance and excellent thermal shock resistance, these materials enable ceramic ball valves to be widely used in some special and high - requirement industrial occasions.

[0003] However, the existing ceramic ball valves have the following disadvantages. Since most ceramic ball valves only need to rotate the handwheel during operation to make the valve core rotate for opening and closing the ceramic ball valve, but the handwheel is exposed outside and is prone to rotate under external influence, and there is no structure convenient for limiting the handwheel, resulting in unstable opening and closing work of the ceramic ball valve. Therefore, the current ceramic ball valves need to be improved. Content of the Utility Model

[0004] The purpose of the utility model is to provide a ceramic ball valve with convenient operation, so as to solve the problem that the handwheel of the current ceramic ball valves in the market is prone to rotate under external influence, and there is no structure convenient for limiting the handwheel, resulting in unstable opening and closing work of the ceramic ball valve as proposed in the above - mentioned background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A ceramic ball valve with convenient operation, including a lower valve body and a valve core. The upper valve body is installed above the lower valve body through bolts. Flanges are connected to both ends of the lower valve body. The valve stem is installed inside the upper valve body and the lower valve body through bearings. The valve core is connected to one end of the valve stem and is located in the middle of the lower valve body. A limiting mechanism is installed inside the upper valve body. The limiting mechanism includes a turntable, a protective cover, a handle, a bidirectional screw, a limiting block and a limiting hole. The bidirectional screw is installed in the built - in groove of the upper valve body through a bearing.

[0006] Preferably, the limiting block is threadedly sleeved on the outer side of the bidirectional screw. One end of the bidirectional screw is connected to the handle. The turntable is fixedly sleeved on the outer side of the valve stem.

[0007] Preferably, a limiting hole is opened on the outer side of the turntable close to the limiting block. The protective cover is fixed on the outer side of the upper valve body close to the handle.

[0008] Preferably, a ceramic layer is provided on the inner wall of the lower valve body. One end of the valve stem away from the valve core is fixedly connected with a handwheel. Both ends of the valve core are connected with a guiding mechanism, and the guiding mechanism is connected to the inner wall of the lower valve body.

[0009] Preferably, sealing rings are installed in the built-in grooves of the lower valve body near both ends of the valve core. A scraper is provided on the outer side of the valve core, and the scraper is connected to the inner wall of the lower valve body.

[0010] Preferably, the guiding mechanism includes a slider and a chute. Sliders are connected to both ends of the valve core.

[0011] Preferably, a chute is formed on the inner wall of the lower valve body near the slider, and the slider is slidably connected to the chute.

[0012] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0013] 1. A limiting mechanism is provided. First, rotate the handwheel to drive the valve stem to rotate. At the same time, the valve stem drives the turntable to rotate. Then, the valve stem drives the valve core to rotate to open or close the ceramic ball valve. Subsequently, rotate the handle to drive the bidirectional screw to rotate. Threaded engagement occurs between the limiting block and the bidirectional screw. The limiting blocks approach each other on the outer side of the bidirectional screw, so that one end of the limiting block is inserted into the limiting hole of the turntable, restricting the position of the turntable, and thus restricting the rotation of the valve stem. This can prevent the handwheel from loosening and rotating to drive the valve core to rotate, improving the stability of the ceramic ball valve while facilitating operation.

[0014] 2. A scraper and a guiding mechanism are provided. While the valve core rotates, it drives the slider to slide annularly in the chute to guide the valve core and prevent it from shaking. And while the valve core rotates, the scraper contacts the valve core and scrapes off the materials adhering to the curved surface of the valve core, improving the practicability of the ceramic ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is the main sectional view structure diagram of the present utility model;

[0016] Figure 2 is the main sectional view structure diagram of the limiting mechanism of the present utility model;

[0017] Figure 3 is the top sectional view structure diagram of the limiting mechanism of the present utility model;

[0018] Figure 4 is the top view structure diagram of the valve core of the present utility model;

[0019] Figure 5 is the top sectional view structure diagram of the guiding mechanism of the present utility model;

[0020] Figure 6 is the three-dimensional structure diagram of the scraper of the present utility model.

[0021] In the figure: 1. Lower valve body; 2. Flange; 3. Upper valve body; 4. Limiting mechanism; 401. Turntable; 402. Protective cover; 403. Handle; 404. Bidirectional screw; 405. Limiting block; 406. Limiting hole; 5. Handwheel; 6. Valve stem; 7. Guiding mechanism; 701. Slide block; 702. Chute; 8. Valve core; 9. Scraper; 10. Ceramic layer; 11. Sealing ring. Specific embodiments

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0023] Please refer to Figures 1 - 5 , the present invention provides a technical solution: a ceramic ball valve with convenient operation, including a lower valve body 1 and a valve core 8. The upper part of the lower valve body 1 is installed with an upper valve body 3 through bolts. Both ends of the lower valve body 1 are connected with flanges 2. The inner sides of the upper valve body 3 and the lower valve body 1 are installed with a valve stem 6 through bearings. The valve core 8 is connected to one end of the valve stem 6, and the valve core 8 is located in the middle of the lower valve body 1. A ceramic layer 10 is provided on the inner wall of the lower valve body 1. One end of the valve stem 6 away from the valve core 8 is fixedly connected with a handwheel 5.

[0024] Please refer to Figures 1 - 3 , a limiting mechanism 4 is installed inside the upper valve body 3. The limiting mechanism 4 includes a turntable 401, a protective cover 402, a handle 403, a bidirectional screw 404, a limiting block 405 and a limiting hole 406. A bidirectional screw 404 is installed in the built-in groove of the upper valve body 3 through a bearing. A limiting block 405 is threadedly sleeved on the outer side of the bidirectional screw 404. One end of the bidirectional screw 404 is connected with a handle 403. A turntable 401 is fixedly sleeved on the outer side of the valve stem 6. A limiting hole 406 is opened on the outer side of the turntable 401 close to the limiting block 405. A protective cover 402 is fixed on the outer side of the upper valve body 3 close to the handle 403. The limiting holes 406 are annularly distributed at equal intervals on the outer side of the turntable 401. The cross-sectional shape of the limiting block 405 is set to be "L" shaped.

[0025] In specific implementation, when operating most ceramic ball valves, only the handwheel 5 needs to be rotated to make the valve core 8 rotate for opening and closing the ceramic ball valve. However, the handwheel 5 is exposed outside and is prone to rotation under external influence, and there is no structure convenient for limiting the position of the handwheel 5, resulting in unstable opening and closing work of the ceramic ball valve. First, the handwheel 5 can be rotated to drive the valve stem 6 to rotate, and at the same time, the valve stem 6 drives the turntable 401 to rotate. Then, the valve stem 6 drives the valve core 8 to rotate to open or close the ceramic ball valve. Subsequently, the handle 403 is rotated to drive the bidirectional screw 404 to rotate. Threaded engagement occurs between the limit block 405 and the bidirectional screw 404, and the limit blocks 405 approach each other on the outer side of the bidirectional screw 404, so that one end of the limit block 405 is inserted into the limit hole 406 of the turntable 401 to limit the position of the turntable 401, thereby restricting the rotation of the valve stem 6, which can prevent the handwheel 5 from loosening and rotating to drive the valve core 8 to rotate, improving the stability of the ceramic ball valve while being convenient for operation.

[0026] Please refer to Figure 1 and Figures 4 - 6 , a guiding mechanism 7 is connected to both ends of the valve core 8, and the guiding mechanism 7 is connected to the inner wall of the lower valve body 1. A sealing ring 11 is installed in the built-in groove of the lower valve body 1 near both ends of the valve core 8. A scraping plate 9 is arranged on the outer side of the valve core 8, and the scraping plate 9 is connected to the inner wall of the lower valve body 1. The guiding mechanism 7 includes a slider 701 and a sliding groove 702. Sliders 701 are connected to both ends of the valve core 8, and sliding grooves 702 are formed in the inner wall of the lower valve body 1 near the sliders 701, and the sliders 701 are slidably connected to the sliding grooves 702. The shape of the sliding groove 702 is set to be annular, and the scraping plate 9 is set to be arc-shaped.

[0027] In specific implementation, since the valve core 8 may shake during rotation, and some materials will adhere to the outer wall of the valve core 8, affecting the rotation of the valve core 8. When the valve core 8 rotates, it can drive the slider 701 to slide annularly in the sliding groove 702 to guide the valve core 8 and prevent shaking. At the same time, when the valve core 8 rotates, the scraping plate 9 contacts the valve core 8 to scrape off the materials adhering to the curved surface of the valve core 8, improving the practicability of the ceramic ball valve.

[0028] Working principle: When using this ceramic ball valve with convenient operation, first, it is connected to the pipeline through the flange 2. The handwheel 5 is rotated to make the valve stem 6 drive the valve core 8 to rotate for opening and closing operations. At the same time, the limiting mechanism 4 limits the valve stem 6, which can limit the valve stem 6 while being convenient for operation and prevent the handwheel 5 from driving the valve core 8 to loosen. The sealing ring 11 seals the edge of the valve core 8. When the valve core 8 rotates, the guiding mechanism 7 guides the valve core 8, and the scraping plate 9 scrapes off the materials adhering to the curved surface of the valve core 8, improving the practicability and stability of the ceramic ball valve. The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0029] 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 described in the foregoing embodiments or perform equivalent replacements on 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 ceramic ball valve that is easy to operate, comprising a lower valve body (1) and a valve core (8), characterized in that: An upper valve body (3) is mounted on the top of the lower valve body (1) by bolts, and flanges (2) are connected to both ends of the lower valve body (1). Valve stems (6) are mounted on the inner sides of the upper valve body (3) and the lower valve body (1) by bearings, and the valve core (8) is connected to one end of the valve stem (6), and the valve core (8) is located in the middle of the lower valve body (1). A limiting mechanism (4) is mounted on the inner side of the upper valve body (3), and the limiting mechanism (4) includes a turntable (401), a protective cover (402), a handle (403), a bidirectional screw (404), a limiting block (405) and a limiting hole (406), and a bidirectional screw (404) is mounted in the built-in groove of the upper valve body (3) by bearings.

2. The ceramic ball valve with convenient operation according to claim 1, characterized in that: The outer side of the bidirectional screw (404) is threadedly sleeved with a limit block (405), one end of the bidirectional screw (404) is connected to a handle (403), and the outer side of the valve stem (6) is fixedly sleeved with a rotating disk (401).

3. The ceramic ball valve with convenient operation according to claim 2 is characterized in that: The rotating disk (401) is provided with a limiting hole (406) on the outer side close to the limiting block (405), and a protective cover (402) is fixed on the outer side of the upper valve body (3) close to the handle (403).

4. The ceramic ball valve with convenient operation according to claim 1, characterized in that: A ceramic layer (10) is provided on the inner wall of the lower valve body (1); one end of the valve stem (6) away from the valve core (8) is fixedly connected to a hand wheel (5); both ends of the valve core (8) are connected to a guide mechanism (7), and the guide mechanism (7) is connected to the inner wall of the lower valve body (1).

5. The ceramic ball valve with convenient operation according to claim 4 is characterized in that: Sealing rings (11) are installed in the built-in grooves of the lower valve body (1) close to the two ends of the valve core (8), and a scraper (9) is provided on the outer side of the valve core (8), and the scraper (9) is connected to the inner wall of the lower valve body (1).

6. The ceramic ball valve with convenient operation according to claim 4, characterized in that: The guide mechanism (7) comprises a slider (701) and a slide groove (702), and both ends of the valve core (8) are connected to the sliders (701).

7. The ceramic ball valve with convenient operation according to claim 6, characterized in that: A sliding groove (702) is provided on the inner wall of the lower valve body (1) close to the sliding block (701), and the sliding block (701) and the sliding groove (702) are slidably connected.

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