Anti-corrosion double-eccentric lining butterfly valve

Abstract

The utility model relates to the technical field of butterfly valves, in particular to an anti-corrosion double-eccentric lining butterfly valve. The butterfly valve comprises a valve body; the valve plate is rotationally mounted on the valve body; the sealing ring is arranged on the valve plate and located at the connecting position of the valve plate and the valve body so as to be used for improving the sealing performance between the valve plate and the valve body. The adjusting pressure plate is mounted on the valve plate, is positioned above the sealing ring and is used for improving the sealing effect of the sealing ring; a first threaded hole is formed in the adjusting pressing disc, a second threaded hole corresponding to the first threaded hole is formed in the valve body, and the pressing degree of the adjusting pressing disc on the sealing ring is adjusted by adjusting the screwing-in degree of a screw penetrating through the first threaded hole in the second threaded hole. The butterfly valve effectively solves the technical problem that in the prior art, due to the fact that the contact tightness between a sealing lining and a groove cannot be adjusted, the butterfly valve is poor in adaptability to different working conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of butterfly valves, in particular to an anti-corrosion double eccentric lined butterfly valve. Background Art

[0002] Butterfly valve, also known as flap valve, is a simple regulating valve. Its core component is a disc-shaped butterfly plate shaped like butterfly wings. This butterfly plate controls the flow and cutoff of the pipeline through rotation. However, the existing butterfly valve has average anti-corrosion performance and stability, which cannot meet its anti-corrosion needs.

[0003] In response to the above problems, the patent document with authorization announcement number CN216200634U discloses a multi-layer lined anti-corrosion butterfly valve, which is provided with a card platform in the middle of the valve seat, a first convex ring and a second convex ring are fixedly provided in the middle of the card platform, a first sealing groove and a second sealing groove corresponding to the two convex rings are provided on the butterfly plate, a sealing liner is provided at one end of the card platform, the sealing liner covers the outside of the first convex ring and the second convex ring, the upper seat is fixedly provided on the top of the valve body and sleeved on the middle of the rotating shaft, a mechanical sealing ring is also sleeved in the middle of the rotating shaft, an anti-corrosion liner is fixedly provided inside the valve body, an external thread is provided on the upper end of the rotating shaft, a screw sleeve is screwed on, a card groove is provided on the top of the upper seat, the inner wall of the valve body is protected against corrosion by the anti-corrosion liner, and when the butterfly valve is rotated to close, the sealing effect is improved by the cooperation of the sealing liner with the two convex rings and the two sealing grooves.

[0004] It can be seen that when the above-mentioned butterfly valve is in use, the sealing effect can be improved by cooperating with the sealing liner, two convex rings and two sealing grooves. However, in actual use, the sealing requirements between the valve body and the butterfly plate under different working conditions are different. For example, under high temperature and high pressure, a stronger sealing force is required between the sealing liner and the convex ring and the groove to prevent leakage. Under low temperature and low pressure, it is necessary to reduce the tightness of the contact between the sealing liner and the groove to reduce friction and wear. The above-mentioned butterfly valve cannot adjust the tightness of the contact between the sealing liner and the groove, resulting in poor adaptability of the butterfly valve to different working conditions. Utility Model Content

[0005] The utility model provides an anti-corrosion double eccentric lined butterfly valve to solve the technical problem in the prior art that the tightness of the contact between the sealing liner and the groove cannot be adjusted, resulting in poor adaptability of the butterfly valve to different working conditions.

[0006] In order to solve the above problems, the anti-corrosion double eccentric lined butterfly valve provided by the utility model adopts the following technical solutions:

[0007] An anti-corrosion double eccentric lined butterfly valve, comprising:

[0008] Valve body;

[0009] A valve plate, which is rotatably installed on the valve body;

[0010] A sealing ring, which is arranged on the valve plate and located at the connection position between the valve plate and the valve body, so as to improve the sealing performance between the valve plate and the valve body;

[0011] It further includes:

[0012] An adjusting pressure plate, which is installed on the valve plate and located above the sealing ring, so as to improve the sealing effect of the sealing ring;

[0013] A first threaded hole is opened on the adjusting pressure plate, and a corresponding second threaded hole is opened on the valve body. The pressing degree of the adjusting pressure plate on the sealing ring is adjusted by adjusting the screwing degree of the screw penetrating the first threaded hole into the second threaded hole.

[0014] The beneficial effect of the anti-corrosion double-eccentric lined butterfly valve provided by the present utility model is that: by arranging an adjusting pressure plate above the sealing ring on the valve plate, opening a first threaded hole on the adjusting pressure plate, opening a corresponding second threaded hole on the valve body, and arranging a screw penetrating the first threaded hole and screwing into the second threaded hole, the pressing degree of the adjusting pressure plate on the sealing ring can be changed by changing the screwing depth of the screw in the second threaded hole, so as to change the tightness of the contact between the sealing ring between the valve body and the valve plate, to adapt to different working conditions. The adjustment process is flexible, making the butterfly valve more practical under different working conditions. Through the above settings, the present utility model effectively solves the technical problem that the tightness of the contact between the sealing lining and the groove in the prior art cannot be adjusted, resulting in poor adaptability of the butterfly valve to different working conditions.

[0015] Further, a spring washer is arranged between the screw and the adjusting pressure plate.

[0016] Further, the valve plate has a groove, and the sealing ring is installed in the groove.

[0017] Further, an upper valve stem and a lower valve stem are respectively installed at both ends of the valve body, and the lower valve stem is connected to the valve plate through a transmission assembly.

[0018] Further, the transmission assembly includes a push-pull pin penetrating the valve plate and the lower valve stem, and an end cover is arranged at one end of the push-pull pin.

[0019] Further, the end cover is connected to the push-pull pin through a bolt.

[0020] Further, a sealing ring is arranged between the push-pull pin and the valve plate.

[0021] Further, a nut is installed at one end of the valve plate away from the end cover of the taper pin, and a bolt that abuts against the end of the taper pin away from the end cover is screwed into the nut.

[0022] Further, anti-corrosion lining plates are plated on the contact surfaces of the valve body and the valve plate that are in contact with the flowing liquid.

[0023] Further, sealing rings are provided between the upper valve stem and the valve body and the valve plate, and sealing rings are also provided between the lower valve stem and the valve body and the valve plate. Description of the Drawings

[0024] By referring to the accompanying drawings and reading the following detailed description, the above and other objects, features, and advantages of the exemplary embodiments of the present utility model will become readily understandable. In the drawings, several embodiments of the present utility model are shown in an exemplary rather than restrictive manner, and the same or corresponding reference numerals denote the same or corresponding parts, wherein:

[0025] Figure 1 is a schematic structural diagram of the anti-corrosion double-eccentric lined butterfly valve provided by the present utility model;

[0026] Figure 2 is a sectional view of the anti-corrosion double-eccentric lined butterfly valve provided by the present utility model;

[0027] Figure 3 is Figure 2 a partial enlarged schematic view at A in

[0028] Figure 4 is Figure 2 a partial enlarged schematic view at B in

[0029] Description of the Reference Numerals:

[0030] 1. Valve body; 2. Valve plate; 3. Sealing ring; 4. Adjusting pressure plate; 5. Screw; 6. Spring washer; 7. Upper valve stem; 8. Lower valve stem; 9. Taper pin; 10. End cover; 11. Bolt; 12. Nut; 13. Anti-corrosion lining plate; 14. Connecting seat; 15. Packing gland; 16. Packing. Detailed Embodiments

[0031] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Those skilled in the art should know that the following described embodiments are part of the embodiments of the present disclosure, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts shall fall within the protection scope of the present utility model.

[0032] It should be noted that the main concept of the anti-corrosion double eccentric lined butterfly valve provided by the present utility model lies in: by installing an adjusting pressure plate on the valve plate, making the adjusting pressure plate located above the sealing ring arranged between the valve plate and the valve body, and arranging screws passing through the first threaded holes on the adjusting pressure plate and screwed into the second threaded holes on the valve plate, the pressing degree of the adjusting pressure plate on the sealing ring can be adjusted by adjusting the screwing depth of the screws in the second threaded holes, so as to change the tightness of the contact between the sealing ring between the valve body and the valve plate, making the butterfly valve applicable to different working conditions.

[0033] After introducing the basic principle of the present utility model, the following specifically introduces various non-limiting implementation manners of the present utility model. The number of any element in the drawings is for illustration rather than limitation, and any naming is only used for distinction without any limiting meaning.

[0034] Next, with reference to several representative implementation manners of the present utility model, the principle and spirit of the present utility model will be elaborated in detail.

[0035] Embodiment 1 of the anti-corrosion double eccentric lined butterfly valve provided by the present utility model:

[0036] As Figures 1 to 4 shown, the anti-corrosion double eccentric lined butterfly valve includes a valve body 1, a valve plate 2, a sealing ring 3 and an adjusting pressure plate 4. The contact surfaces of the valve body 1 and the valve plate 2 with the flowing liquid are both plated with anti-corrosion lining plates 13.

[0037] Regarding the valve body 1. Upper valve stem 7 and lower valve stem 8 are respectively installed at both ends of the valve body 1. The lower valve stem 8 is connected to the valve plate 2 through a transmission assembly. The transmission assembly includes a taper pin 9 passing through the valve plate 2 and the lower valve stem 8. An end cover 10 is provided at the upper end of the taper pin 9. The valve body 1 is provided with a nut 12 at the position corresponding to the lower end of the taper pin 9, and a bolt 11 that abuts against the lower end of the taper pin 9 is screwed into the nut 12.

[0038] Specifically, sealing rings 3 are provided between the upper valve stem 7 and both the valve body 1 and the valve plate 2, and sealing rings 3 are provided between the lower valve stem 8 and both the valve body 1 and the valve plate 2.

[0039] Regarding the valve plate 2 and the adjusting pressure plate 4. The valve plate 2 has a groove at its connection position with the valve body 1, and a sealing ring 3 is arranged in the groove to improve the sealing performance between the valve plate 2 and the valve body 1. An adjusting pressure plate 4 is arranged above the sealing ring 3 to improve the sealing effect of the sealing ring 3; a first threaded hole is opened at the center position of the adjusting pressure plate 4, and a second threaded hole corresponding to the first threaded hole is opened on the valve plate 2. The pressing degree of the adjusting pressure plate 4 on the sealing ring 3 is adjusted by the screwing degree of the screw 5 passing through the first threaded hole in the second threaded hole; a spring washer 6 is arranged between the screw 5 and the adjusting pressure plate 4.

[0040] In addition, the right end of the valve body 1 is connected with a connecting seat 14 by bolts, and the right end of the valve body 1 is also connected with a packing gland 15 by bolts 11. A packing 16 is filled in the area surrounded by the packing gland 15, the valve body 1 and the lower valve stem 8.

[0041] The working principle of the anti-corrosion double-eccentric lined butterfly valve provided by the present utility model is as follows: First, according to different operating conditions, adjust the screwing depth of the screw 5 in the second threaded hole to adjust the tightness of the contact between the sealing ring 3 and the valve body 1 and the valve plate 2. Then, when it is necessary to open the butterfly valve, hold the lower valve stem 8 tightly and rotate it. Drive the valve plate 2 to rotate by the transmission action of the taper pin 9, so that there are only two relative contact points between the outer periphery of the valve plate 2 and the valve body 1, so that the liquid can flow out. During the flow of the liquid, the anti-corrosion lining plate 13 protects the valve body 1 and the valve plate 2 from being corroded by the liquid. When it is necessary to close the butterfly valve, hold the lower valve stem 8 tightly and rotate it. Drive the valve plate 2 to rotate by the transmission action of the taper pin 9, so that the outer periphery of the valve plate 2 is in contact with the valve body 1, thereby preventing the liquid from flowing continuously.

[0042] Embodiment 2 of the anti-corrosion double-eccentric lined butterfly valve provided by the present utility model:

[0043] The main difference between it and Embodiment 1 is that:

[0044] In Embodiment 1, a spring washer is arranged between the screw and the adjusting pressure plate.

[0045] In this embodiment, a gasket plate is arranged between the screw and the adjusting pressure plate.

[0046] According to the above description of this specification, those skilled in the art can also understand the following terms used, such as the terms indicating the orientation or position relationship, such as "upper", "lower", "front", "rear", "left", "right", "width", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or position relationship shown in the drawings of this specification. It is only for the purpose of facilitating the description of the solution of the present utility model and simplifying the description, rather than explicitly or implicitly indicating that the device or element involved must have the specific orientation, be constructed and operated in the specific orientation. Therefore, the above terms of orientation or position relationship cannot be understood or interpreted as a limitation to the solution of the present utility model.

[0047] In addition, in the description of this specification, the meaning of "a plurality" is at least two, such as two, three or more, etc., unless otherwise specifically defined.

Claims

1. An anti-corrosion double eccentric lined butterfly valve, comprising: Valve body; a valve plate rotatably mounted on the valve body; A sealing ring, which is arranged on the valve plate and located at the connection position between the valve plate and the valve body, so as to improve the sealing performance between the valve plate and the valve body; It is characterized by further comprising: An adjusting pressure plate, which is mounted on the valve plate and located above the sealing ring to improve the sealing effect of the sealing ring; The regulating pressure plate is provided with a first threaded hole, and the valve body is provided with a second threaded hole corresponding thereto, and the degree of tightening of the regulating pressure plate on the sealing ring is adjusted by adjusting the degree of screwing of the screw penetrating the first threaded hole into the second threaded hole; A spring washer is arranged between the screw and the adjusting pressure plate.

2. The anti-corrosion double eccentric lined butterfly valve according to claim 1, characterized in that: The valve plate is provided with a groove, and the sealing ring is installed in the groove.

3. The anti-corrosion double eccentric lined butterfly valve according to claim 1 or 2, characterized in that: An upper valve stem and a lower valve stem are respectively installed at two ends of the valve body, and the lower valve stem is connected to the valve plate through a transmission component.

4. The anti-corrosion double eccentric lined butterfly valve according to claim 3, characterized in that: The transmission assembly comprises a push pin penetrating the valve plate and the lower valve stem, and an end cover is arranged at one end of the push pin.

5. The anti-corrosion double eccentric lined butterfly valve according to claim 4, characterized in that: The end cover is connected to the push-pull pin via bolts.

6. The anti-corrosion double eccentric lined butterfly valve according to claim 4 or 5, characterized in that: A sealing ring is arranged between the push-pull pin and the valve plate.

7. The anti-corrosion double eccentric lined butterfly valve according to claim 4 or 5, characterized in that: A nut is installed on the valve plate at one end of the push-pull pin away from the end cover, and a bolt abutting against one end of the push-pull pin away from the end cover is screwed into the nut.

8. The anti-corrosion double eccentric lined butterfly valve according to claim 1 or 2, characterized in that: The contact surfaces of the valve body and the valve plate with the circulating liquid are plated with anti-corrosion linings.

9. The anti-corrosion double eccentric lined butterfly valve according to claim 3, characterized in that: A sealing ring is arranged between the upper valve stem, the valve body and the valve plate, and a sealing ring is also arranged between the lower valve stem, the valve body and the valve plate.

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