Spherical sealing self-compensating fluorine-lined butterfly valve

Abstract

The utility model provides a spherical surface sealing self-compensation type fluorine lining butterfly valve which comprises an upper clamping seat, a lower clamping seat, a bolt, a valve rod, a fluorine lining valve seat and a fluorine lining valve plate, the fluorine lining valve seat is fixedly installed between the upper clamping seat and the lower clamping seat, and the upper clamping seat and the lower clamping seat are fixedly connected through the bolt; the fluorine-lined valve plate is rotationally mounted in the fluorine-lined valve seat, air bags are fixedly mounted on the two sides of the fluorine-lined valve plate respectively, and the fluorine-lined valve plate is fixedly connected with the valve rod in the upper clamping seat; when the fluorine lining valve plate is not closed in place and a small gap is formed between the fluorine lining valve plate and the fluorine lining valve seat, the semispherical air bag can be extruded under the pressure of a medium; when the sealing device is in use, air in the hemispherical air bag is forced to enter the sheet type air bag, so that the peripheral surface of the sheet type air bag is expanded out of the annular cavity, and the expanded part is in contact with the fluorine lining valve seat, so that a gap generated between the fluorine lining valve seat and the fluorine lining valve plate can be blocked, and a self-compensation sealing effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the field of fluorine-lined butterfly valves, and in particular relates to a spherical sealing self-compensating fluorine-lined butterfly valve. Background Art

[0002] Fluorine-lined butterfly valve, also known as fluoroplastic lined corrosion-resistant valve, is a valve that uses polytetrafluoroethylene resin (or processed profiles) for molding (or inlaying) on ​​the inner wall of the valve pressure-bearing part or the outer surface of the valve internals. It uses the unique performance of polytetrafluoroethylene in resisting strong corrosive media to manufacture various valves and pressure vessels.

[0003] However, the existing fluorine-lined butterfly valve cannot cut off the flow of the medium when the valve needs to be closed and the valve fails, resulting in a loose closure, so there are certain safety hazards.

[0004] Therefore, it is very necessary to invent a spherical sealing self-compensating fluorine-lined butterfly valve. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a spherical seal self-compensating fluorine-lined butterfly valve adopts the following technical solution: a spherical seal self-compensating fluorine-lined butterfly valve, comprising an upper clamp seat, a lower clamp seat, bolts, a valve stem, a fluorine-lined valve seat and a fluorine-lined valve plate, wherein: the fluorine-lined valve seat is fixedly installed between the upper clamp seat and the lower clamp seat, and the upper clamp seat and the lower clamp seat are fixedly connected by bolts; the fluorine-lined valve plate is rotatably installed in the fluorine-lined valve seat, and air bags are fixedly installed on both sides of the fluorine-lined valve plate, and the fluorine-lined valve plate is fixedly connected to the valve stem in the upper clamp seat;

[0006] Preferably, a cavity for installing an airbag is provided on each side of the fluorine-lined valve plate, and the airbag is fixedly installed in the corresponding cavity;

[0007] Preferably, the chamber includes a circular hole and an annular cavity, and the circular hole is opened at the center of one side of the fluorine-lined valve plate, and the annular cavity is opened inside one side of the fluorine-lined valve plate; the annular cavity runs through the circumferential surface of the fluorine-lined valve plate, and the annular cavity is connected to the circular hole, and the circular hole and the cavity are coaxial; the airbag is fixedly installed in the circular hole and the annular cavity;

[0008] Preferably, the airbag includes a sheet-type airbag, and an integrated hemispherical airbag is arranged at the center of one side of the sheet-type airbag, and the hemispherical airbag is connected to the sheet-type airbag; the hemispherical airbag is in a circular hole, and the hemispherical airbag leaks out of the circular hole; the sheet-type airbag is fixedly installed in the annular cavity, and the diameter of the sheet-type airbag matches the diameter of the annular cavity.

[0009] Preferably, an integrated valve stem seat is provided on the upper clamp seat; the valve stem is rotatably installed in the valve stem seat, and a corresponding sealing filler is provided between the valve stem and the valve stem seat.

[0010] Preferably, a rotating shaft is rotatably installed at the lower part of the lower clamp seat, and one end of the rotating shaft passes through the fluorine-lined valve seat and is plugged in and out of the fluorine-lined valve plate.

[0011] Preferably, an upper valve stem connecting seat and a lower rotating shaft connecting seat are evenly and fixedly installed on the circumference of the fluorine-lined valve plate, and the upper valve stem connecting seat and the lower rotating shaft connecting seat are arranged in mirror image positions with the fluorine-lined valve plate as the center; the bottom end of the valve stem passes through the fluorine-lined valve seat and the upper valve stem connecting seat for plugging and fixed connection; one end of the rotating shaft passes through the fluorine-lined valve seat and the lower rotating shaft connecting seat for plugging and fixed connection.

[0012] Preferably, two axial holes are evenly distributed through the circumference of the fluorine-lined valve seat, and the inner surface of the fluorine-lined valve seat is subjected to engineering spherical surface treatment; the valve stem and the rotating shaft are located in the corresponding axial holes, and the valve stem and the rotating shaft are rotatably connected to the corresponding axial holes.

[0013] Compared with the prior art, the advantages of the utility model are:

[0014] The overall arrangement of the utility model can squeeze the hemispherical airbag under the pressure of the medium when the fluorine-lined valve plate is not closed properly and a small gap is generated between the fluorine-lined valve seat; the gas inside the hemispherical airbag is forced to enter the sheet airbag, so that the circumference of the sheet airbag will expand out of the annular cavity, and the expanded part will contact the fluorine-lined valve seat, so that the gap generated between the fluorine-lined valve seat and the fluorine-lined valve plate can be blocked, thereby achieving a self-compensating sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the explosion structure of the fluorine-lined valve plate and the air bag of the utility model.

[0016] Figure 2 It is a schematic diagram of the partial cutaway structure of the fluorine-lined valve plate and the air bag of the utility model.

[0017] Figure 3 It is a schematic diagram of the fluorine-lined valve plate and the air bag structure of the utility model.

[0018] Figure 4 It is a schematic diagram of the overall structure of the utility model.

[0019] In the figure:

[0020] Upper clamping seat 1, lower clamping seat 2, bolt 3, valve stem seat 4, valve stem 5, fluorine-lined valve seat 6, fluorine-lined valve plate 7, circular hole 71, annular cavity 72, airbag 8, sheet airbag 81, hemispherical airbag 82, upper valve stem connecting seat 9, lower rotating shaft connecting seat 10. DETAILED DESCRIPTION

[0021] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be described clearly and completely below. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the utility model.

[0022] In the description of the embodiments, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, which are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For ordinary technicians in this field, the specific meanings of the above terms in the utility model can be understood according to specific circumstances.

[0023] The utility model is further described below in conjunction with the accompanying drawings:

[0024] Embodiment 1

[0025] Reference Figure 1-4 A spherical sealing self-compensating fluorine-lined butterfly valve comprises an upper clamping seat 1, a lower clamping seat 2, a bolt 3, a valve stem 5, a fluorine-lined valve seat 6 and a fluorine-lined valve plate 7, wherein: the fluorine-lined valve seat 6 is fixedly installed between the upper clamping seat 1 and the lower clamping seat 2, and the upper clamping seat 1 and the lower clamping seat 2 are fixedly connected by bolts 3. The fluorine-lined valve seat 6 is conveniently replaced by the arrangement of the upper clamping seat 1, the lower clamping seat 2 and the bolts 3; the fluorine-lined valve plate 7 is rotatably installed in the fluorine-lined valve seat 6, and air bags 8 are fixedly installed on both sides of the fluorine-lined valve plate 7. Through the arrangement of the air bags 8, when the fluorine-lined valve plate 7 is in a closed state, the air bags 8 can be forced to expand to one side of the fluorine-lined valve seat 6 under the action of the medium pressure, thereby improving the sealing between the fluorine-lined valve plate 7 and the fluorine-lined valve seat 6, and achieving an automatic compensation effect. The fluorine-lined valve plate 7 is fixedly connected to the valve stem 5 in the upper clamping seat 1;

[0026] Both sides of the fluorine-lined valve plate 7 are provided with chambers for installing the airbag 8, so as to fix the airbag 8 and limit the expansion path of the airbag 8, and the airbag 8 is fixedly installed in the corresponding chamber;

[0027] The chamber includes a circular hole 71 and an annular cavity 72, and the circular hole 71 is opened at the center of one side of the fluorine-lined valve plate 7. The circular hole 71 is set so that the hemispherical airbag 82 can contact the medium. The annular cavity 72 is opened inside one side of the fluorine-lined valve plate 7. The setting of the annular cavity 72 can facilitate the sheet-type airbag 81 to expand outward when the hemispherical airbag 82 is subjected to the pressure of the medium, and at the same time, the hemispherical airbag 82 is shielded, and the contact area with the medium is reduced when the fluorine-lined valve plate 7 is opened; the annular cavity 72 runs through the circumferential surface of the fluorine-lined valve plate 7, and the annular cavity 72 is connected with the circular hole 71, and the circular hole 71 and the cavity 72 are coaxial; the airbag 8 is fixedly installed in the circular hole 71 and the annular cavity 72;

[0028] The airbag 8 includes a sheet airbag 81. Through the setting of the sheet airbag 81, when the hemispherical airbag 82 is subjected to the pressure of the medium, it can expand outward and contact the inner surface of the fluorine-lined valve seat 6 to achieve a self-compensating sealing effect, and an integrated hemispherical airbag 82 is arranged at the center of one side of the sheet airbag 81. The hemispherical airbag 82 is connected to the sheet airbag 81. Through the setting of the hemispherical airbag 82, the required amount of air can be provided for the expansion of the sheet airbag 81; the hemispherical airbag 82 is in the circular hole 71, and the hemispherical airbag 82 leaks out of the circular hole 71; the sheet airbag 81 is fixedly installed in the annular cavity 72, and the diameter of the sheet airbag 81 matches the diameter of the annular cavity 72.

[0029] In this embodiment, when in use, under normal circumstances, after the fluorine-lined valve plate 7 is closed, the pressure of the medium in the pipeline will act on the hemispherical airbag 82, and the gas inside the hemispherical airbag 82 will enter the sheet airbag 81, forcing the sheet airbag 81 to expand outward from the annular cavity 72; the expanded part of the sheet airbag 81 will contact the inner surface of the fluorine-lined valve seat 6, and the greater the pressure of the medium, the tighter the contact between the expanded part of the sheet airbag 81 and the inner surface of the fluorine-lined valve seat 6, and the better the overall sealing performance.

[0030] When it is necessary to close the fluorine-lined valve plate 7 and a fault occurs, the fluorine-lined valve plate 7 cannot be closed in place, and a certain gap is generated between the fluorine-lined valve plate 7 and the fluorine-lined valve seat 6; at this time, the pressure of the medium in the pipeline will also act on the hemispherical airbag 82, and the gas inside the hemispherical airbag 82 will enter the sheet airbag 81, forcing the sheet airbag 81 to expand outward from the annular cavity 72, so that the expanded part of the sheet airbag 81 contacts the inner surface of the fluorine-lined valve seat 6; the greater the pressure of the medium, the better the sealing performance of the sheet airbag 81 on the gap generated between the fluorine-lined valve plate 7 and the fluorine-lined valve seat 6, thereby achieving a self-compensating sealing effect.

[0031] Utilizing the technical solution described in the utility model, or those skilled in the art designing similar technical solutions inspired by the technical solution of the utility model to achieve the above-mentioned technical effects, all fall within the protection scope of the utility model.

Claims

1. A spherical seal self-compensating fluorine-lined butterfly valve, characterized in that: It comprises an upper clamping seat (1), a lower clamping seat (2), bolts (3), a valve stem (5), a fluorine-lined valve seat (6) and a fluorine-lined valve plate (7), wherein: the fluorine-lined valve seat (6) is fixedly mounted between the upper clamping seat (1) and the lower clamping seat (2), and the upper clamping seat (1) and the lower clamping seat (2) are fixedly connected via bolts (3); the fluorine-lined valve plate (7) is rotatably mounted in the fluorine-lined valve seat (6), and air bags (8) are fixedly mounted on both sides of the fluorine-lined valve plate (7), and the fluorine-lined valve plate (7) is fixedly connected to the valve stem (5) in the upper clamping seat (1); The two sides of the fluorine-lined valve plate (7) are respectively provided with a cavity for installing the airbag (8), and the airbag (8) is fixedly installed in the corresponding cavity; The chamber comprises a circular hole (71) and an annular cavity (72), wherein the circular hole (71) is arranged at the center of one side of the fluorine-lined valve plate (7), and the annular cavity (72) is arranged inside one side of the fluorine-lined valve plate (7); the annular cavity (72) penetrates the circumferential surface of the fluorine-lined valve plate (7), and the annular cavity (72) is communicated with the circular hole (71); the airbag (8) is fixedly installed in the circular hole (71) and the annular cavity (72); The airbag (8) comprises a sheet-type airbag (81), and an integrated hemispherical airbag (82) is arranged on one side of the sheet-type airbag (81), and the hemispherical airbag (82) is communicated with the sheet-type airbag (81); the hemispherical airbag (82) is located in the circular hole (71), and the hemispherical airbag (82) leaks out of the circular hole (71); the sheet-type airbag (81) is fixedly installed in the annular cavity (72).

2. A spherical seal self-compensating fluorine-lined butterfly valve as claimed in claim 1, characterized in that: An integrated valve stem seat (4) is arranged on the upper clamp seat (1); the valve stem (5) is rotatably mounted in the valve stem seat (4), and corresponding sealing fillers are arranged between the valve stem (5) and the valve stem seat (4).

3. A spherical seal self-compensating fluorine-lined butterfly valve as claimed in claim 1, characterized in that: A rotating shaft is rotatably mounted at the lower portion of the lower clamping seat (2), and one end of the rotating shaft passes through the fluorine-lined valve seat (6) and is plugged in and out of the fluorine-lined valve plate (7).

4. A spherical seal self-compensating fluorine-lined butterfly valve as claimed in claim 3, characterized in that: An upper valve stem connection seat (9) and a lower rotating shaft connection seat (10) are evenly and fixedly mounted on the circumference of the fluorine-lined valve plate (7); the bottom end of the valve stem (5) passes through the fluorine-lined valve seat (6) and is plugged in and fixedly connected to the upper valve stem connection seat (9); one end of the rotating shaft passes through the fluorine-lined valve seat (6) and is plugged in and fixedly connected to the lower rotating shaft connection seat (10).

5. A spherical seal self-compensating fluorine-lined butterfly valve as claimed in claim 4, characterized in that: The circumferential surface of the fluorine-lined valve seat (6) is evenly penetrated with two axial holes, and the inner surface of the fluorine-lined valve seat (6) is subjected to engineering spherical surface treatment; the valve stem (5) and the rotating shaft are located in the corresponding axial holes, and the valve stem (5) and the rotating shaft are rotatably connected to the corresponding axial holes.

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