Fluorine-lined butterfly valve with high corrosion resistance and negative pressure resistance

Abstract

The utility model provides a high corrosion resistance and negative pressure resistance fluorine lining butterfly valve, which comprises a butterfly valve body, two compensation valve seats, a compensation type butterfly valve plate and a driving part, the two compensation valve seats are fixedly arranged in the butterfly valve body, the compensation type butterfly valve plate is arranged between the compensation valve seats, and the compensation valve seats and the compensation type butterfly valve plate are in interference contact with each other; the compensation type butterfly valve plate is fixedly connected with the driving part through a valve shaft; an innovative deformable structural design is adopted, and a traditional rubber shearing sealing mode is abandoned. The butterfly valve plate outer ring sealing ring is in a fillet V shape, the contact area is increased, the sealing effect is improved, and the sealing performance is enhanced through the elastic deformation characteristic of the butterfly valve plate outer ring sealing ring. Double sealing is achieved through the double rubber ring structure, medium leakage is effectively prevented, and it is guaranteed that the valve keeps excellent sealing performance under high pressure or negative pressure.

Description

Technical Field

[0001] The utility model belongs to the technical field of fluorine butterfly valves, and particularly relates to a highly corrosion-resistant and negative-pressure-resistant fluorine-lined butterfly valve. Background Art

[0002] Fluorine-lined butterfly valve is a valve that uses fluorine-lined materials both inside and outside, mainly polytetrafluoroethylene (PTFE), which has excellent chemical corrosion resistance and anti-friction properties. Therefore, fluorine-lined butterfly valve performs well in liquid and gas processing, especially when dealing with corrosive media such as strong acids, strong alkalis, and high-temperature liquids. It can effectively resist the erosion of corrosive media and is suitable for the control of various corrosive media.

[0003] At present, although the fluorine-lined butterfly valve is equipped with a rubber sealing seat inside, the shear force seal formed between the sealing seat and the butterfly valve plate has a good effect in the early stage, but after long-term use, the rubber sealing seat will inevitably be rubbed by the inclined surface of the butterfly valve plate and gradually wear out. This wear will directly affect the sealing performance between the sealing seat and the butterfly valve plate, resulting in a decrease in the sealing performance of both, thereby affecting the negative pressure resistance performance of the butterfly valve.

[0004] Therefore, it is very necessary to invent a highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve. Utility Model Content

[0005] In order to solve the above technical problems, the utility model provides a highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve, comprising a butterfly valve body, a compensation valve seat, a compensation butterfly valve plate and a driving component, wherein two compensation valve seats are fixedly installed inside the butterfly valve body, and the compensation butterfly valve plate is arranged between the compensation valve seats, and the two are in interference contact with each other; the compensation butterfly valve plate is fixedly connected to the driving component through a valve shaft;

[0006] The compensating butterfly valve plate includes a butterfly valve plate, a groove, a compensating sealing ring, a sealing rubber ring A and a sealing rubber ring B. The butterfly valve plate is fixedly connected to the driving component through a valve shaft. An annular groove is provided on the outer ring surface of the butterfly valve plate. The compensating sealing ring is installed in the groove with an interference fit. The sealing rubber ring A and the sealing rubber ring B are arranged inside the compensating sealing ring; the compensating sealing ring is in interference contact with the compensating butterfly valve plate.

[0007] Preferably, the compensating valve seat is a semicircular structure, and the butterfly valve plate is located between the two compensating valve seats, the inclined surface of the compensating valve seat is in interference contact with the compensating sealing ring installed on the butterfly valve plate; a hollow cavity is provided inside the compensating valve seat, and a sealing rubber ring is provided in the hollow cavity.

[0008] Preferably, the groove formed on the butterfly valve plate is a trapezoidal ring groove, and the compensating sealing ring installed inside the groove is a rounded "V"-shaped structure made of spring steel.

[0009] Preferably, the sealing rubber ring A is located inside the card slot and also on the inner side of the sealing rubber ring B, and the sealing rubber ring B is located above the inner side of the compensation sealing ring; the cross-sectional diameter of the sealing rubber ring A is greater than the cross-sectional diameter of the sealing rubber ring B.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] The utility model abandons the traditional rubber shear sealing method and innovatively adopts a deformable structure design with excellent compensation. The sealing ring of the outer ring of the butterfly valve plate adopts a rounded "V" cross-section to increase the contact area and improve the sealing effect. At the same time, its elastic deformation characteristics further enhance the sealing performance. The double rubber ring structure set inside forms a double seal, which effectively prevents medium leakage and ensures that the valve can maintain excellent sealing under high pressure or negative pressure. In addition, the unique design of the rubber ring can compensate for the performance degradation caused by long-term use or medium erosion. The hollow cavity design of the sealing seat serves as a buffer zone for medium flow, reducing impact and improving valve stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0013] Figure 2 It is a schematic diagram of the opening structure of the compensating butterfly valve plate of the utility model.

[0014] Figure 3 The utility model is a schematic diagram of the structure of a compensating butterfly valve plate and a compensating valve seat.

[0015] In the figure:

[0016] Butterfly valve body 1, compensation valve seat 2, compensation butterfly valve plate 3, butterfly valve plate 31, groove 32, compensation sealing ring 33, sealing rubber ring A34, sealing rubber ring B35, driving component 4. DETAILED DESCRIPTION

[0017] 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.

[0018] 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.

[0019] As attached Figure 1 To Attachment Figure 3 As shown:

[0020] The utility model provides a highly corrosion-resistant and negative-pressure-resistant fluorine-lined butterfly valve, comprising a butterfly valve body 1, a compensation valve seat 2, a compensation butterfly valve plate 3 and a driving component 4, wherein a fluorine lining is arranged on the inner side of the butterfly valve body 1, and two compensation valve seats 2 are fixedly installed inside the butterfly valve body 1, and the compensation butterfly valve plate 3 is arranged between the compensation valve seats 2, and the two are in interference contact with each other; the compensation butterfly valve plate 3 is fixedly connected to the driving component 4 through a valve shaft, and an interference contact is adopted between the compensation valve seat 2 and the compensation butterfly valve plate 3, which not only enhances the sealing effect, but also enables the butterfly valve to maintain stable sealing performance when subjected to negative pressure.

[0021] The compensating butterfly valve plate 3 includes a butterfly valve plate 31, a groove 32, a compensating sealing ring 33, a sealing rubber ring A34 and a sealing rubber ring B35. The butterfly valve plate 31 is fixedly connected to the driving component 4 through a valve shaft. An annular groove 32 is provided on the outer ring surface of the butterfly valve plate 31. The compensating sealing ring 33 is installed in the groove 32 by interference fit. The sealing rubber ring A34 and the sealing rubber ring B35 are arranged inside the compensating sealing ring 33. The compensating sealing ring 33 is in interference contact with the compensating butterfly valve plate 3.

[0022] Embodiment 1:

[0023] Specifically, the compensation valve seat 2 is a semicircular structure made of corrosion-resistant metal, and the butterfly valve plate 31 is located between the two compensation valve seats 2. The inclined surface of the compensation valve seat 2 is in interference contact with the compensation sealing ring 33 installed on the butterfly valve plate 31, thereby enhancing the sealing performance. A hollow cavity is arranged inside the compensation valve seat 2. The design of the hollow cavity can not only serve as a buffer zone for the flow of the medium and reduce the impact of the medium on the inside of the valve, but also a sealing rubber ring is arranged therein to further enhance the sealing performance.

[0024] Specifically, the groove 32 opened on the butterfly valve plate 31 is a trapezoidal annular groove, and the compensating sealing ring 33 installed inside the groove 32 is a rounded "V"-shaped structure made of spring steel. This structure enables the compensating sealing ring 33 to produce a certain elastic deformation when subjected to pressure, thereby enhancing the sealing performance.

[0025] Specifically, the sealing rubber ring A34 is located inside the slot 32 and also inside the sealing rubber ring B35, and the sealing rubber ring B35 is located above the inner side of the compensation sealing ring 33; the cross-sectional diameter of the sealing rubber ring A34 is greater than the cross-sectional diameter of the sealing rubber ring B35, and the double sealing rubber rings (sealing rubber ring A34 and sealing rubber ring B35) arranged inside the compensation sealing ring 33 form a double sealing structure, which further improves the sealing effect.

[0026] Embodiment 2:

[0027] First, the driving component 4 drives the compensation butterfly valve plate 3 to rotate through the valve shaft. When the butterfly valve plate 31 rotates, the compensation sealing ring 33 on its outer ring surface maintains interference contact with the compensation valve seat 2, thereby ensuring the sealing performance of the valve in the closed state. The compensation sealing ring 33 adopts a rounded "V"-shaped structure made of spring steel, which enables it to produce elastic deformation when subjected to pressure, further enhancing the sealing effect of the valve during closing or adjustment. At the same time, the double sealing rubber rings (sealing rubber ring A34 and sealing rubber ring B35) arranged inside the compensation sealing ring 33 also play an important sealing role. The sealing rubber ring A34 is located inside the card groove 32, and the sealing rubber ring B35 is located above the inner side of the compensation sealing ring 33, and the cross-sectional diameter of the sealing rubber ring A34 is larger than the cross-sectional diameter of the sealing rubber ring B35. This design further improves the sealing performance of the valve. When the valve is opened or the flow is adjusted, the butterfly valve plate 31 changes the channel size between it and the compensation valve seat 2 by rotating, thereby controlling the flow of the medium. The hollow cavity inside the compensation valve seat 2 is designed as a buffer zone for the flow of the medium, which reduces the impact of the flow of the medium on the internal structure of the valve, and also provides the valve with a certain negative pressure resistance. In addition, since the inner side of the butterfly valve body 1 is provided with fluorine lining, the overall corrosion resistance of the butterfly valve is enhanced, making it suitable for various corrosive media environments.

[0028] 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 highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve, characterized in that: The invention comprises a butterfly valve body (1), a compensation valve seat (2), a compensation butterfly valve plate (3) and a driving component (4); two compensation valve seats (2) are fixedly installed inside the butterfly valve body (1); the compensation butterfly valve plate (3) is arranged between the compensation valve seats (2), and the two are in interference contact with each other; the compensation butterfly valve plate (3) is fixedly connected to the driving component (4) via a valve shaft; The compensating butterfly valve plate (3) comprises a butterfly valve plate (31), a groove (32), a compensating sealing ring (33), a sealing rubber ring A (34) and a sealing rubber ring B (35); the butterfly valve plate (31) is fixedly connected to the driving component (4) via a valve shaft; an annular groove (32) is provided on the outer ring surface of the butterfly valve plate (31); the compensating sealing ring (33) is installed in the groove (32) in an interference fit; the sealing rubber ring A (34) and the sealing rubber ring B (35) are arranged inside the compensating sealing ring (33); the compensating sealing ring (33) is in interference contact with the compensating butterfly valve plate (3).

2. A highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve as claimed in claim 1, characterized in that: The compensation valve seat (2) is a semicircular structure, and the butterfly valve plate (31) is located between the two compensation valve seats (2). The inclined surface of the compensation valve seat (2) is in interference contact with the compensation sealing ring (33) installed on the butterfly valve plate (31); a hollow cavity is arranged inside the compensation valve seat (2), wherein a sealing rubber ring is arranged in the hollow cavity.

3. A highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve as claimed in claim 1, characterized in that: The clamping groove (32) provided on the butterfly valve plate (31) is a trapezoidal annular groove, and the compensating sealing ring (33) installed inside the clamping groove (32) is a rounded "V"-shaped structure made of spring steel.

4. A highly corrosion-resistant and negative pressure-resistant fluorine-lined butterfly valve as claimed in claim 1, characterized in that: The sealing rubber ring A (34) is located inside the slot (32) and also inside the sealing rubber ring B (35), while the sealing rubber ring B (35) is located above the inside of the compensation sealing ring (33); the cross-sectional diameter of the sealing rubber ring A (34) is greater than the cross-sectional diameter of the sealing rubber ring B (35).

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