Triple-eccentric hard sealing butterfly valve used at high and low temperatures

Abstract

The utility model relates to the technical field of sealing butterfly valves, and discloses a three-eccentric hard sealing butterfly valve for high and low temperatures, which comprises a valve body, a rotating shaft is sleeved on the side wall of the valve body, a valve plate is fixedly connected on the side wall of the rotating shaft, and a sealing component is arranged on the inner wall of the valve body. According to the three-eccentric hard sealing butterfly valve used at high and low temperatures, the elastic piece pushes the movable arc strip to be attached to the valve plate, tight fit between the valve plate and the movable arc strip can still be guaranteed under the condition of thermal expansion and cold contraction, it is guaranteed that the sealing performance is not affected, the sealing performance of the valve is guaranteed, and the U-shaped plate and the O-shaped sleeve provide multi-layer sealing protection; the fan-shaped cleaning brush is used for cleaning the inner wall of the mounting seat, so that impurities, sediments or particulate matters in the medium are prevented from being attached to the inner wall of the mounting seat, the influence of the sediments or particulate matters on opening and closing of the valve is prevented, the possibility of clamping stagnation or abrasion of the valve is reduced, and the service life of the valve is prolonged. And long-term reliable operation of the system is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of sealed butterfly valves, in particular to a triple-eccentric hard-sealed butterfly valve for high and low temperatures. Background Art

[0002] Butterfly valve is a regulating valve used in pipelines that transport various corrosive and non-corrosive fluid media in engineering systems such as natural gas, city gas, hot and cold air, power generation and environmental protection, and building water supply and drainage. It is used to regulate and cut off the flow of the medium.

[0003] The triple eccentric butterfly valve adds a unique "eccentric" to the double eccentric butterfly valve. This unique eccentricity makes the valve disc sealing surface contact with the valve body only in the closed position, thus minimizing friction or wear.

[0004] However, during actual use of the above-mentioned three-eccentric butterfly valve, especially when the temperature difference between hot and cold is large during transportation, the seals inside the butterfly valve will produce large gaps due to thermal expansion and contraction, which will directly affect the sealing performance of the valve and may cause leakage of media such as liquid or gas. In view of this, we propose a three-eccentric hard-sealed butterfly valve for high and low temperature use. Summary of the Invention

[0005] The purpose of the utility model is to provide a triple eccentric hard-sealed butterfly valve for high and low temperatures to solve the problems raised in the above background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solution: a triple-eccentric hard-sealed butterfly valve for high and low temperature use, comprising a valve body, a rotating shaft being sleeved on the side wall of the valve body, a valve plate being fixedly connected to the side wall of the rotating shaft, and a sealing assembly being provided on the inner wall of the valve body, the sealing assembly comprising:

[0007] A fan-shaped cleaning brush is fixedly connected to the side of the valve plate;

[0008] A movable arc strip, wherein the inner wall of the valve body is fixedly connected to a mounting seat, the movable arc strip is slidably connected to the inner wall of the mounting seat, the movable arc strip abuts against the elastic member, and the inner wall of the mounting seat is provided with an O-shaped sleeve;

[0009] A U-shaped plate, an inner wall of the mounting seat is fixedly connected to an elastic telescopic rod, and the U-shaped plate is fixedly connected to one end of the elastic telescopic rod away from the inner wall of the mounting seat.

[0010] Preferably, an annular cleaning brush is fixedly connected to the inner wall of the mounting seat, and the annular cleaning brushes are provided in two groups, and the two groups of annular cleaning brushes are respectively provided on both sides of the valve plate.

[0011] Preferably, there are two groups of elastic parts and movable arc strips, and the two groups of elastic parts and movable arc strips are symmetrically arranged. The cross-section of the movable arc strip is concave-shaped, and the corners of the movable arc strip on one side of the valve plate are provided with arc chamfers, and the movable arc strip is in contact with the valve plate.

[0012] Preferably, the O-shaped sleeve is made of elastic material, the O-shaped sleeve fits against the outer wall of the movable arc strip, and the U-shaped plate abuts against the joints of the two groups of movable arc strips.

[0013] Preferably, the fan-shaped cleaning brush is movably connected to the movable arc bar, and the valve plate is rotated so that the fan-shaped cleaning brush cleans the end surface of the movable arc bar. The annular cleaning brush is movably connected to the valve plate, and the valve plate is rotated so that the annular cleaning brush cleans the end surface of the valve plate and the fan-shaped cleaning brush.

[0014] Preferably, flanges are fixedly connected to both sides of the valve body, and one end of the rotating shaft away from the valve plate is fixedly connected to the output shaft of the external driving device.

[0015] Compared with the existing technology, the utility model provides a high and low temperature triple eccentric hard seal butterfly valve, which has the following beneficial effects:

[0016] 1. This high and low temperature triple-eccentric hard-seal butterfly valve uses the fan-shaped cleaning brush, movable arc strip, O-shaped sleeve and U-shaped plate. The elastic part pushes the movable arc strip to fit the valve plate. Under the condition of thermal expansion and contraction, it can still ensure the close fit between the valve plate and the movable arc strip, ensuring that the sealing is not affected and the sealing performance of the valve is guaranteed. The U-shaped plate and O-shaped sleeve provide multi-layer sealing protection to prevent the medium from leaking through the gaps caused by thermal expansion and contraction. The fan-shaped cleaning brush cleans the inner wall of the mounting seat, thereby preventing impurities, sediments or particles in the medium from adhering to the inner wall of the mounting seat and affecting the normal opening and closing operation of the valve.

[0017] 2. The triple eccentric hard-sealed butterfly valve for high and low temperatures uses an annular cleaning brush to clean the end faces of the valve plate and the fan-shaped cleaning brush, further preventing the influence of sediment or particles on the opening and closing of the valve, reducing the possibility of valve sticking or wear, and ensuring long-term reliable operation of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the cross-sectional structure of the valve body of the utility model;

[0020] Figure 3 This is a schematic diagram of the valve plate structure of the utility model;

[0021] Figure 4This is a schematic diagram of the cross-sectional structure of the main body of the utility model;

[0022] Figure 5 For this utility model Figure 4 Schematic diagram of the structure of the middle A area;

[0023] Figure 6 For this utility model Figure 5 Schematic diagram of the structure of the middle B area;

[0024] Figure 7 This is a schematic diagram of the U-shaped plate structure of the utility model.

[0025] In the figure: 1. valve body; 2. flange; 3. rotating shaft; 4. valve plate; 5. fan-shaped cleaning brush; 6. mounting seat; 7. elastic member; 8. movable arc strip; 9. O-shaped sleeve; 10. elastic telescopic rod; 11. U-shaped plate; 12. annular cleaning brush. DETAILED DESCRIPTION

[0026] like Figure 1-Figure 7 As shown, the utility model provides a technical solution: a triple-eccentric hard-seal butterfly valve for high and low temperatures, comprising a valve body 1, a rotating shaft 3 being sleeved on the side wall of the valve body 1, flanges 2 being fixedly connected on both sides of the valve body 1, an end of the rotating shaft 3 away from the valve plate 4 being fixedly connected to the output shaft of an external drive device, the side wall of the rotating shaft 3 being fixedly connected to the valve plate 4, a sealing assembly being provided on the inner wall of the valve body 1, and the sealing assembly comprising a fan-shaped cleaning brush 5, a mounting seat 6, an elastic member 7, a movable arc strip 8, an O-shaped sleeve 9, an elastic telescopic rod 10, a U-shaped plate 11, and an annular cleaning brush 12.

[0027] In one embodiment of the present utility model, a fan-shaped cleaning brush 5 is fixedly connected to the side of the valve plate 4, and the fan-shaped cleaning brush 5 is movably connected to the movable arc bar 8. The valve plate 4 is rotated so that the fan-shaped cleaning brush 5 cleans the end surface of the movable arc bar 8. The inner wall of the mounting seat 6 is fixedly connected with an annular cleaning brush 12. There are two groups of annular cleaning brushes 12. The two groups of annular cleaning brushes 12 are respectively arranged on both sides of the valve plate 4. The annular cleaning brush 12 is movably connected to the valve plate 4. The valve plate 4 is rotated so that the annular cleaning brush 12 cleans the end surface of the valve plate 4 and the fan-shaped cleaning brush 5.

[0028] The inner wall of the valve body 1 is fixedly connected to the mounting seat 6, the movable arc strip 8 is slidably connected to the inner wall of the mounting seat 6, the movable arc strip 8 abuts against the elastic member 7, and the inner wall of the mounting seat 6 is provided with an O-shaped sleeve 9, the O-shaped sleeve 9 is an elastic material, the O-shaped sleeve 9 fits against the outer wall of the movable arc strip 8, and the U-shaped plate 11 abuts against the joint of the two groups of movable arc strips 8. There are two groups of elastic members 7 and movable arc strips 8, and the two groups of elastic members 7 and the movable arc strips 8 are symmetrically arranged. The cross-section of the movable arc strip 8 is concave, and the corners of the movable arc strip 8 on one side of the valve plate 4 are provided with arc chamfers. The movable arc strip 8 fits against the valve plate 4, and the inner wall of the mounting seat 6 is fixedly connected with an elastic telescopic rod 10, and the U-shaped plate 11 is fixedly connected to the end of the elastic telescopic rod 10 away from the inner wall of the mounting seat 6.

[0029] The rotating shaft 3 drives the valve plate 4 to rotate, and the valve plate 4 presses the movable arc strip 8 to move toward the inside of the mounting seat 6. The elastic member 7 is deformed by pressure, and then when the axis of the valve plate 4 is perpendicular to the axis of the valve body 1, the groove on the movable arc strip 8 matches the shape on the valve plate 4. Under the elastic action of the elastic member 7, the movable arc strip 8 fits the valve plate 4. The elastic member 7 provides an adaptive adjustment function, which can still ensure the close fit between the valve plate 4 and the movable arc strip 8 under the condition of thermal expansion and contraction, ensuring that the sealing is not affected, thereby ensuring the sealing performance of the valve.

[0030] Under the elastic action of the elastic telescopic rod 10, the U-shaped plate 11 abuts against the joints of the movable arc strips 8 to fill the gaps between the movable arc strips 8. The O-shaped sleeve 9 always fits with the movable arc strip 8 under the elastic action to fill the gaps between the movable arc strip 8 and the mounting seat 6, providing multi-layer sealing protection to prevent the medium from leaking through the gaps caused by thermal expansion and contraction, especially when processing fluid or gaseous media, ensuring the sealing of the system, reducing the possibility of leakage, and improving the reliability of the seal.

[0031] During the rotation of the valve plate 4, the fan-shaped cleaning brush 5 cleans the inner wall of the mounting seat 6, thereby preventing impurities, sediments or particles in the medium from adhering to the inner wall of the mounting seat 6 and affecting the normal opening and closing operation of the valve, reducing their wear on the valve components, ensuring the cleanliness of the sealing surface, and thus ensuring the sealing effect.

[0032] In addition, an annular cleaning brush 12 is fixedly connected to the inner wall of the mounting seat 6. There are two groups of annular cleaning brushes 12, and the two groups of annular cleaning brushes 12 are respectively arranged on both sides of the valve plate 4. The valve plate 4 is rotated so that the annular cleaning brush 12 cleans the end surface of the valve plate 4 and the fan-shaped cleaning brush 5, further preventing the influence of sediment or particulate matter on the opening and closing of the valve, reducing the possibility of valve jamming or wear, and ensuring long-term reliable operation of the system.

[0033] In the present utility model, when in use, the rotating shaft 3 drives the valve plate 4 to rotate, and the elastic member 7 is deformed by pressure. Under the elastic action of the elastic member 7, the movable arc strip 8 is pushed to fit the valve plate 4. In the process of rotating the valve plate 4, the fan-shaped cleaning brush 5 cleans the inner wall of the mounting seat 6, and the annular cleaning brush 12 cleans the end surface of the valve plate 4 and the fan-shaped cleaning brush 5.

[0034] The above generally describes the present invention in detail. However, it is obvious to those skilled in the art that modifications or improvements may be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A high and low temperature triple eccentric hard-sealed butterfly valve, comprising a valve body (1), a rotating shaft (3) sleeved on the side wall of the valve body (1), and a valve plate (4) fixedly connected to the side wall of the rotating shaft (3), characterized in that: The inner wall of the valve body (1) is provided with a sealing assembly, and the sealing assembly comprises: A fan-shaped cleaning brush (5), the side of the valve plate (4) is fixedly connected to the fan-shaped cleaning brush (5); A movable arc strip (8), the inner wall of the valve body (1) is fixedly connected to a mounting seat (6), the movable arc strip (8) is slidably connected to the inner wall of the mounting seat (6), the movable arc strip (8) abuts against the elastic member (7), and the inner wall of the mounting seat (6) is provided with an O-shaped sleeve (9); A U-shaped plate (11) is fixedly connected to the inner wall of the mounting seat (6) with an elastic telescopic rod (10), and the U-shaped plate (11) is fixedly connected to an end of the elastic telescopic rod (10) away from the inner wall of the mounting seat (6).

2. A high and low temperature triple eccentric hard-sealed butterfly valve according to claim 1, characterized in that: An annular cleaning brush (12) is fixedly connected to the inner wall of the mounting seat (6), and the annular cleaning brush (12) is provided in two groups, and the two groups of annular cleaning brushes (12) are respectively provided on both sides of the valve plate (4).

3. The high and low temperature triple eccentric hard-sealed butterfly valve according to claim 1, characterized in that: The elastic members (7) and the movable arc strips (8) are provided in two groups, and the two groups of the elastic members (7) and the movable arc strips (8) are symmetrically arranged. The cross-section of the movable arc strips (8) is arranged in a concave shape. The corners of the movable arc strips (8) located on one side of the valve plate (4) are provided with arc chamfers, and the movable arc strips (8) are fitted with the valve plate (4).

4. The high and low temperature triple eccentric hard-sealed butterfly valve according to claim 3, characterized in that: The O-shaped sleeve (9) is made of elastic material, and the O-shaped sleeve (9) fits the outer wall of the movable arc strip (8), and the U-shaped plate (11) abuts against the joints of the two groups of movable arc strips (8).

5. The high and low temperature triple eccentric hard-sealed butterfly valve according to claim 2, characterized in that: The fan-shaped cleaning brush (5) is movably connected to the movable arc strip (8), and the annular cleaning brush (12) is movably connected to the valve plate (4).

6. The high and low temperature triple eccentric hard-sealed butterfly valve according to claim 1, characterized in that: Flanges (2) are fixedly connected to both sides of the valve body (1), and one end of the rotating shaft (3) away from the valve plate (4) is fixedly connected to the output shaft of an external driving device.

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