Triple-eccentric metal hard sealing butterfly valve

Abstract

The utility model relates to the technical field of valves, in particular to a triple-eccentric metal hard sealing butterfly valve, which comprises a valve body, a valve plate arranged in the valve body, a handle arranged at the top of the valve body, a valve shaft arranged in the middle of the valve plate, a top of the valve shaft connected with the handle, and a triple-eccentric design adopted by components in the valve body. A one-way assembly is installed at an outlet in the front face of the valve body and comprises a shell, an outer ring is installed on the inner wall of the shell, a rotating shaft is arranged in the middle of the outer ring, a plurality of connecting plates are installed on the outer side of the end of the rotating shaft through bearings, outer rings are installed at the outer ends of the connecting plates, and the outer walls of the outer rings are fixedly welded to the inner wall of the shell. Pressing plates are mounted at the bottom ends of the rotating shafts. In the three-eccentric metal hard sealing butterfly valve, in the aspect of sealing performance, the butterfly valve adopts a three-eccentric principle and a metal hard sealing material, so that a better sealing effect can be achieved when the valve is closed. One-way passing of water flow can be guaranteed through the one-way assembly, and the backflow phenomenon is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a three-eccentric metal hard-sealed butterfly valve. Background Art

[0002] The butterfly valve is a device widely used in the field of fluid control, especially suitable for occasions that require frequent operation, rapid cut-off and flow regulation. With the development of industrial technology and the continuous improvement of fluid control requirements, the design and performance of butterfly valves have also been continuously improved and optimized. In the traditional butterfly valve design, there are usually some problems, such as poor sealing performance, large fluid resistance, large operating torque and short service life. In order to solve these problems, engineers continue to explore new butterfly valve design concepts and structural forms, among which the three-eccentric metal hard seal butterfly valve is a relatively successful new type of butterfly valve. The three-eccentric metal hard seal butterfly valve adopts the three-eccentric principle in design, that is, there are eccentric distances in three directions between the valve plate axis and the center line of the sealing surface and the center line of the valve body. This design can make the butterfly valve achieve better sealing performance when closed, while reducing fluid resistance and operating torque. In addition, the use of metal hard sealing materials as sealing pairs further improves the sealing performance and wear resistance of the butterfly valve and extends its service life.

[0003] However, the existing three-eccentric metal hard-sealed butterfly valve still has some problems in practical applications, such as backflow caused by reverse flow of fluid, unstable sealing performance, inflexible operation, etc. In order to solve these problems, the utility model provides an improved three-eccentric metal hard-sealed butterfly valve, which aims to further improve the sealing performance and service life of the butterfly valve and meet a wider range of application requirements. Utility Model Content

[0004] The purpose of the utility model is to provide a three-eccentric metal hard-sealed butterfly valve to solve the problems of the existing three-eccentric metal hard-sealed butterfly valve mentioned in the above background technology in practical applications, such as backflow caused by reverse flow of fluid, unstable sealing performance, inflexible operation, etc.

[0005] To achieve the above-mentioned purpose, the utility model provides a three-eccentric metal hard-sealed butterfly valve, including a valve body, a valve plate is installed inside the valve body, a handle is arranged on the top of the valve body, a valve shaft is installed in the middle of the valve plate, the top of the valve shaft is connected to the handle, the inner parts of the valve body adopt a three-eccentric design, a one-way component is installed at the front outlet of the valve body, the one-way component includes an outer shell, an outer ring is installed on the inner wall of the outer shell, a rotating shaft is arranged in the middle of the outer ring, a plurality of connecting plates are installed on the outer side of the end of the rotating shaft through bearings, an outer ring is installed on the outer end of the connecting plate, the outer wall of the outer ring is welded and fixed to the inner wall of the outer shell, a spring is sleeved on the outer wall of the rotating shaft, and a pressure plate is installed on the bottom end of the rotating shaft.

[0006] Preferably, a bevel gear is installed at the end of the handle, and a bevel gear is also installed at the top of the valve shaft. The two bevel gears are meshed with each other, and the rotation of the handle drives the valve shaft to rotate, thereby realizing the opening and closing of the valve plate.

[0007] Preferably, a sealing gasket is installed on the inner wall of the valve body.

[0008] Preferably, the size of the valve plate matches the size of the inner wall of the valve body.

[0009] Preferably, a protrusion is installed on the inner wall of the shell near the pressure plate, and an outer wall of the protrusion is provided with an inclined surface.

[0010] Preferably, a fixing rod is welded to the upper outer wall of the rotating shaft at one end of the spring, and the bottom end of the spring is welded and fixed to the pressure plate.

[0011] Preferably, the adjacent connecting plates are distributed in a fan shape on the inner side of the outer ring, and water holes are provided between the adjacent connecting plates.

[0012] Preferably, an outer wall of the pressing plate is provided with an inclined surface, and the outer side surface of the pressing plate is in contact with the outer wall of the protrusion.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] In terms of sealing performance, the three-eccentric metal hard seal butterfly valve adopts the three-eccentric principle and metal hard seal materials to ensure that the valve can achieve a better sealing effect when it is closed. The one-way component can ensure the one-way passage of water flow to avoid backflow.

[0015] In terms of operating performance, the butterfly valve optimizes the design of the shaft and the connecting plate to make the valve operation more flexible and smooth. At the same time, the setting of the handle enables the operator to control the switch state of the valve more conveniently, improving the convenience and efficiency of operation. In terms of durability, the butterfly valve uses wear-resistant and corrosion-resistant materials to make key components, such as the housing, shaft and valve plate, so that the valve can maintain stable performance and service life even in harsh working environments. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front structural schematic diagram of the utility model;

[0017] Figure 2 This is one of the side structural schematic diagrams of the utility model;

[0018] Figure 3 This is a schematic diagram of the internal structure of the valve body in the utility model;

[0019] Figure 4 This is the second schematic diagram of the side structure of the present utility model.

[0020] The meaning of each number in the figure is:

[0021] 1. Valve body; 11. Valve plate; 12. Handle; 13. Bump; 14. Sealing gasket; 2. One-way component; 21. Housing; 22. Outer ring; 23. Bearing; 24. Rotating shaft; 25. Connecting plate; 26. Spring; 27. Pressure plate; 3. Valve shaft. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] The utility model provides a three-eccentric metal hard-sealed butterfly valve, such as Figure 1-Figure 4 As shown, it includes a valve body 1, a valve plate 11 is installed inside the valve body 1, a handle 12 is arranged on the top of the valve body 1, a valve shaft 3 is installed in the middle of the valve plate 11, and the top of the valve shaft 3 is connected to the handle 12. The inner parts of the valve body 1 adopt a three-eccentric design, and a one-way component 2 is installed at the front outlet of the valve body 1. The one-way component 2 includes an outer shell 21, an outer ring 22 is installed on the inner wall of the outer shell 21, a rotating shaft 24 is arranged in the middle of the outer ring 22, a plurality of connecting plates 25 are installed on the outer side of the end of the rotating shaft 24 through bearings 23, the outer end of the connecting plate 25 is installed with the outer ring 22, the outer wall of the outer ring 22 is welded and fixed to the inner wall of the outer shell 21, the outer wall of the rotating shaft 24 is sleeved with a spring 26, and the bottom end of the rotating shaft 24 is installed with a pressure plate 27.

[0024] It is worth noting that the three-eccentric design of the internal parts of the valve body 1 refers to:

[0025] Axis eccentricity: This refers to the eccentric distance between the rotation axis of the valve plate 11 in the valve and the flange axis of the valve body 1. The main function of this design is to ensure that the valve plate 11 can fully contact the sealing surface of the valve body 1 when it is fully opened or closed, thereby ensuring good sealing. Spherical eccentricity: This refers to the eccentric distance between the geometric center of the valve plate 11 and the flange axis of the valve body 1. The function of this eccentric design is to reduce the opening and closing torque, reduce the friction in the operation of the SLIM pipeline, and make the operation of the valve smoother and more efficient. Sealing surface eccentricity: This refers to the eccentric distance between the center of the sealing surface of the valve body 1 and the flange axis of the valve body 1. Its function is to ensure that the valve can maintain good sealing performance at any opening degree, thereby improving the service life and reliability of the valve. The three-eccentric valve optimizes the sealing performance, operating performance and service life of the valve through these three eccentric designs, making this valve have a wide range of application value in industrial production. This is the three-eccentric design of the valve in the prior art, and no further elaboration will be given here.

[0026] In this embodiment, a bevel gear is installed at the end of the handle 12, and a bevel gear is also installed on the top of the valve shaft 3. The two bevel gears are meshed with each other. The rotation of the handle 12 drives the valve shaft 3 to rotate, thereby realizing the opening and closing of the valve plate 11.

[0027] Specifically, a sealing gasket 14 is installed on the inner wall of the valve body 1 to ensure the sealing performance of the valve plate 11 when it is closed.

[0028] Furthermore, the size of the valve plate 11 is matched with the size of the inner wall of the valve body 1 to ensure an effective sealing effect.

[0029] Furthermore, a protrusion 13 is installed on the inner wall of the housing 21 near the pressure plate 27 , and an outer wall of the protrusion 13 is provided with an inclined surface to facilitate flow diversion so that the fluid can push the pressure plate 27 open.

[0030] Furthermore, one end of the spring 26 is welded to a fixing rod on the outer wall of the upper end of the rotating shaft 24 , and the bottom end of the spring 26 is welded and fixed to the pressing plate 27 .

[0031] Furthermore, the adjacent connecting plates 25 are distributed in a fan shape on the inner side of the outer ring 22, and water holes are provided between the adjacent connecting plates 25 to facilitate the passage of fluid.

[0032] Furthermore, the outer wall of the pressing plate 27 is provided with an inclined surface, and the outer side surface of the pressing plate 27 is in contact with the outer wall of the protrusion 13, so as to ensure the sealing performance.

[0033] When the triple eccentric metal hard seal butterfly valve of the utility model is used, first when the flow of the fluid needs to be adjusted, the operator will turn the handle 12. Since the bevel gear at the end of the handle 12 is meshed with the bevel gear at the top of the valve shaft 3, turning the handle 12 will drive the valve shaft 3 to rotate together. This rotation further drives the valve plate 11 to open and close, thereby controlling the flow of the fluid.

[0034] When the valve plate 11 is fully closed, its sealing surface will fit tightly with the sealing gasket 14 installed on the inner wall of the valve body 1, ensuring good sealing performance, thanks to the three-eccentric design of axial eccentricity, spherical eccentricity and sealing surface eccentricity. This design not only optimizes the sealing performance of the valve, but also improves the operating performance and service life.

[0035] In addition, when the fluid flows out of the valve body 1, it will pass through the one-way component 2. Under normal circumstances, the pressure plate 27 is kept in close contact with the protrusion 13 on the inner wall of the shell 21 under the action of the spring 26 to form a seal to prevent the fluid from flowing back. However, when fluid flows out of the valve body 1 and generates sufficient pressure, this pressure will act on the inclined surface of the pressure plate 27 to push it open. At this time, the fluid can flow through the water holes between the adjacent connecting plates 25, realizing the one-way flow function. When the fluid pressure decreases or disappears, the spring 26 will push the pressure plate 27 to fit with the protrusion 13 again to form a seal again.

[0036] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A triple eccentric metal hard seal butterfly valve, comprising a valve body (1), characterized in that: A valve plate (11) is installed inside the valve body (1), a handle (12) is arranged on the top of the valve body (1), a valve shaft (3) is installed in the middle of the valve plate (11), and the top of the valve shaft (3) is connected to the handle (12), the inner part of the valve body (1) adopts a three-eccentric design, a one-way component (2) is installed at the front outlet of the valve body (1), and the one-way component (2) includes an outer shell (21), and the inner wall of the outer shell (21) An outer ring (22) is installed, a rotating shaft (24) is arranged in the middle of the outer ring (22), a plurality of connecting plates (25) are installed on the outer side of the end of the rotating shaft (24) through a bearing (23), the outer end of the connecting plate (25) is installed with the outer ring (22), the outer wall of the outer ring (22) is welded and fixed to the inner wall of the outer shell (21), the outer wall of the rotating shaft (24) is sleeved with a spring (26), and a pressure plate (27) is installed at the bottom end of the rotating shaft (24).

2. The triple eccentric metal hard seal butterfly valve according to claim 1 is characterized in that: A bevel gear is installed at the end of the handle (12), and a bevel gear is also installed at the top of the valve shaft (3). The two bevel gears are meshed with each other. The rotation of the handle (12) drives the valve shaft (3) to rotate, thereby realizing the opening and closing of the valve plate (11).

3. The triple eccentric metal hard seal butterfly valve according to claim 1 is characterized in that: A sealing gasket (14) is installed on the inner wall of the valve body (1).

4. The triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The size of the valve plate (11) is matched to the size of the inner wall of the valve body (1).

5. The triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: A protrusion (13) is installed on the inner wall of the housing (21) near the pressure plate (27), and an outer wall of the protrusion (13) is provided with an inclined surface.

6. The triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: One end of the spring (26) is welded to a fixing rod on the upper outer wall of the rotating shaft (24), and the bottom end of the spring (26) is welded and fixed to a pressing plate (27).

7. The triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The adjacent connecting plates (25) are distributed in a fan-shaped manner on the inner side of the outer ring (22), and water holes are provided between the adjacent connecting plates (25).

8. The triple eccentric metal hard seal butterfly valve according to claim 1, characterized in that: The outer wall of the pressing plate (27) is provided with an inclined surface, and the outer side surface of the pressing plate (27) is in contact with the outer wall of the protrusion (13).

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