Double-pile hard alloy all-metal sealing butterfly valve

Abstract

The utility model discloses a double-pile hard alloy all-metal sealing butterfly valve, belongs to the technical field of valves, and solves the problems that when the butterfly valve is unblocked, fluid is kept in a flowing state, the heat exchange efficiency is poor, and the butterfly valve cannot be closed once the butterfly valve is closed. And the fluid is still, so that the heat is easily transferred to an electric driving or gas driving structure through the butterfly plate. Comprising a tubular valve body, a valve plate rotationally connected into one end of the tubular valve body and a plurality of sets of sealing air bags, and the multiple sets of sealing air bags are arranged in the tubular valve body in the length direction of the tubular valve body and arranged on the side, facing a feeding port, of the tubular valve body. When the butterfly valve is used for conveying high-temperature fluid, the valve plate is controlled through the valve rod to seal the discharge port of the tubular valve body. And during blocking, the air pump pumps air into the cavity, so that the first-stage to third-stage sealing air bags bulge to form a cross-shaped seam, and eccentric sealing is realized. Air in the air bag reduces heat transfer, the valve plate and the driving structure are protected, and high-temperature damage is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a double-stack hard alloy all-metal sealing butterfly valve. Background Art

[0002] The butterfly valve is a valve with a simple structure and convenient operation. It is widely used in water treatment, chemical industry, oil and gas and other industries. Its main feature is to control the flow of fluid by rotating the butterfly plate to achieve rapid opening and closing. The butterfly plate of the butterfly valve usually fits tightly with the valve seat to ensure good sealing performance. This valve has low fluid resistance, small size, light weight, and is easy to install and maintain. The butterfly valve also has a variety of drive modes, such as electric and pneumatic, to meet different operating requirements. In addition, the butterfly valve is particularly suitable for occasions that require frequent opening and closing, but it should be avoided under high pressure difference to prevent damage to the sealing surface.

[0003] Especially when the butterfly valve is on the path of a high-temperature pipeline, the electric drive or gas drive of the butterfly valve may cause damage to the circuit or structure due to heat exchange with the high-temperature fluid transmitted in the high-temperature pipeline. At present, when the butterfly valve is unobstructed, the heat exchange efficiency is poor because the fluid remains in a flowing state. However, once the butterfly valve is closed, the fluid becomes stationary, which can easily cause heat to be transferred to the electric drive or gas drive structure through the butterfly plate.

[0004] Therefore, a double-stack carbide all-metal sealed butterfly valve is proposed to solve or alleviate the above problems. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes a double-stack hard alloy all-metal sealing butterfly valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A double-stack hard alloy all-metal sealed butterfly valve comprises a tubular valve body, a valve plate rotatably connected to one end of the tubular valve body, and a plurality of groups of sealing airbags, wherein the plurality of groups of sealing airbags are arranged in the tubular valve body along its length direction, and the plurality of groups of sealing airbags are arranged on the side of the tubular valve body facing the feed inlet, the valve plate is arranged on the side of the tubular valve body facing the discharge outlet, and the joints of the plurality of groups of sealing airbags are all eccentrically arranged.

[0008] Preferably, several groups of the sealing airbags all have an expanded state and an open state. When several groups of the sealing airbags are in the expanded state, the seams of several groups of the sealing airbags are eccentrically arranged. When several groups of the sealing airbags are in the open state, several groups of the sealing airbags open the internal flow channels of the tubular valve bodies.

[0009] Preferably, the several groups of sealing airbags include four primary sealing airbags, four secondary sealing airbags, and four tertiary sealing airbags, and cavities are set between the primary sealing airbags, the secondary sealing airbags, and the tertiary sealing airbags and the inner wall of the tubular valve body.

[0010] Preferably, the primary cross seams, the secondary cross seams, and the tertiary cross seams formed by the four primary sealing airbags, the four secondary sealing airbags, and the four tertiary sealing airbags are all eccentrically arranged.

[0011] Preferably, a plurality of inlet pipes penetrating into the cavity are fixedly connected to the tubular valve body, and the inlet pipes are connected to an air pump.

[0012] Preferably, a valve seat in communication with one end of the tubular valve body is fixedly connected to the outside thereof, a valve stem is rotatably connected inside the valve seat, and a lower end of the valve stem is fixedly connected to the valve plate.

[0013] Preferably, one end of the tubular valve body facing the feed inlet is fixedly connected with a flange.

[0014] Preferably, the tubular valve body, valve seat and flange are all made of double-stack hard alloy, and the primary sealing airbag, secondary sealing airbag and tertiary sealing airbag are all made of nitrile rubber.

[0015] The utility model has the following beneficial effects:

[0016] When the butterfly valve of the utility model is used for high-temperature fluid transportation, the valve stem controls the valve plate to close the outlet of the tubular valve body. When blocking, the air pump pumps gas into the cavity, so that the first to third level sealing airbags swell to form a cross seam to achieve eccentric sealing. The air in the airbag reduces heat transfer, protects the valve plate and the drive structure, and prevents damage by high temperature. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

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

[0019] Figure 2 It is a schematic diagram of the structure of the primary sealing airbag, the secondary sealing airbag, and the tertiary sealing airbag in the utility model.

[0020] 1. Tubular valve body; 2. Valve seat; 3. Valve stem; 4. Flange; 5. Inlet pipe; 6. Primary sealing airbag; 7. Secondary sealing airbag; 8. Tertiary sealing airbag; 9. Cavity. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0022] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0024] In the description of the present utility model, it should be understood that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is conventionally placed when in use, or are the orientations or positional relationships conventionally understood by those skilled in the art. They are only for the convenience of describing the present 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 should not be understood as a limitation on the present utility model.

[0025] Furthermore, the terms “first”, “second”, “third”, etc. are merely used for distinguishing descriptions and are not to be understood as indicating or implying relative importance.

[0026] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it 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 indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] Double pile carbide all-metal sealing butterfly valve, such as Figure 1 As shown, it includes a tubular valve body 1, a valve plate rotatably connected to one end of the tubular valve body 1, and a plurality of sealing air bags. The plurality of sealing air bags are arranged in the tubular valve body 1 along its length direction, and the plurality of sealing air bags are arranged on the side of the tubular valve body 1 facing the feed port, the valve plate is arranged on the side of the tubular valve body 1 facing the discharge port, and the joints of the plurality of sealing air bags are eccentrically arranged.

[0028] like Figure 2 As shown, a valve seat 2 which is in communication with the tubular valve body 1 is fixedly connected to the outer side of one end thereof, a valve stem 3 is rotatably connected inside the valve seat 2, the lower end of the valve stem 3 is fixedly connected to the valve plate, a flange 4 is fixedly connected to the end of the tubular valve body 1 which faces the feed port, and the tubular valve body 1, the valve seat 2 and the flange 4 are all made of double-stacked hard alloy.

[0029] Several groups of sealing airbags are in an expanded state and an open state. When the several groups of sealing airbags are in an expanded state, the joints of the several groups of sealing airbags are eccentrically set. When the several groups of sealing airbags are in an open state, the several groups of sealing airbags open the internal flow channel of the tubular valve body 1. The several groups of sealing airbags include four primary sealing airbags 6, four secondary sealing airbags 7, and four tertiary sealing airbags 8. The primary sealing airbags 6, the secondary sealing airbags 7, and the tertiary sealing airbags 8 are all made of nitrile rubber. A cavity 9 is set between the primary sealing airbags 6, the secondary sealing airbags 7, and the tertiary sealing airbags 8 and the inner wall of the tubular valve body 1. The primary cross seams, the secondary cross seams, and the tertiary cross seams formed by the four primary sealing airbags 6, the four secondary sealing airbags 7, and the four tertiary sealing airbags 8 are all eccentrically set. The tubular valve body 1 is fixedly connected with a plurality of inlet pipes 5 that penetrate into the cavity 9, and the inlet pipes 5 are connected to an air pump.

[0030] When the utility model is actually applied, the tubular valve body 1 is used to transport high-temperature fluid, and the flange 4 is convenient for connecting the tubular valve body 1 with the pipeline. When the butterfly valve needs to block the high-temperature fluid, the valve stem 3 is used to drive the valve plate, so that the valve plate closes the end of the tubular valve body 1 facing the discharge port, and then the gas is pumped into the inlet pipe 5 through the air pump, and further pumped into the cavity 9 through the inlet pipe 5, so that the primary sealing airbag 6, the secondary sealing airbag 7, and the tertiary sealing airbag 8 all begin to swell and switch from the open state to the expanded state, so that the four primary sealing airbags 6 can be expanded and fitted together to form a primary cross seam. Similarly, the four secondary sealing airbags 7 can be expanded. After expansion, they are fitted together to form a secondary cross seam, so that the four tertiary sealing airbags 8 can be expanded and fitted together to form a tertiary cross seam. At this time, the primary cross seam, the secondary cross seam, and the tertiary cross seam are all eccentrically arranged, that is, the primary cross seam, the secondary cross seam, and the tertiary cross seam cannot overlap, so that the high-temperature fluid can be blocked by the primary sealing airbag 6, the secondary sealing airbag 7, and the tertiary sealing airbag 8, and the primary sealing airbag 6, the secondary sealing airbag 7, and the tertiary sealing airbag 8 are filled with air, which can further reduce the high-temperature fluid The heat transferred to the valve plate prevents the valve plate from further transferring heat to the electric drive or air drive structure, and prevents these structures from being damaged due to high temperature.

[0031] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. Double pile carbide all-metal sealing butterfly valve, characterized by: It comprises a tubular valve body (1), a valve plate rotatably connected to one end of the tubular valve body (1), and a plurality of groups of sealing airbags, wherein the plurality of groups of sealing airbags are arranged in the tubular valve body (1) along its length direction, and the plurality of groups of sealing airbags are arranged on the side of the tubular valve body (1) facing the feed inlet, the valve plate is arranged on the side of the tubular valve body (1) facing the feed outlet, and the joints of the plurality of groups of sealing airbags are all eccentrically arranged.

2. The double-stack carbide all-metal sealing butterfly valve according to claim 1 is characterized in that: The plurality of groups of sealing airbags are in an expanded state and an open state. When the plurality of groups of sealing airbags are in an expanded state, the seams of the plurality of groups of sealing airbags are eccentrically arranged. When the plurality of groups of sealing airbags are in an open state, the plurality of groups of sealing airbags open the internal flow passage of the tubular valve body (1).

3. The double-stack carbide all-metal sealing butterfly valve according to claim 2 is characterized in that: The plurality of groups of sealing airbags include four primary sealing airbags (6), four secondary sealing airbags (7), and four tertiary sealing airbags (8), and a cavity (9) is provided between the primary sealing airbags (6), the secondary sealing airbags (7), and the tertiary sealing airbags (8) and the inner wall of the tubular valve body (1).

4. The double-stack carbide all-metal sealing butterfly valve according to claim 3 is characterized in that: The primary cross seams, the secondary cross seams, and the tertiary cross seams formed by the four primary sealing airbags (6), the four secondary sealing airbags (7), and the four tertiary sealing airbags (8) are all eccentrically arranged.

5. The double-stack carbide all-metal sealing butterfly valve according to claim 3 is characterized in that: A plurality of inlet pipes (5) penetrating into the cavity (9) are fixedly connected to the tubular valve body (1), and the inlet pipes (5) are connected to an air pump.

6. The double-stack carbide all-metal sealing butterfly valve according to claim 3 is characterized in that: One end of the tubular valve body (1) is fixedly connected to the outside of a valve seat (2) which is in communication therewith, and a valve stem (3) is rotatably connected inside the valve seat (2), and the lower end of the valve stem (3) is fixedly connected to the valve plate.

7. The double-stack carbide all-metal sealing butterfly valve according to claim 6 is characterized in that: The end of the tubular valve body (1) facing the feed inlet is fixedly connected with a flange (4).

8. The double-stack carbide all-metal sealing butterfly valve according to claim 7 is characterized in that: The tubular valve body (1), the valve seat (2) and the flange (4) are all made of double-stacked hard alloy, and the primary sealing airbag (6), the secondary sealing airbag (7) and the tertiary sealing airbag (8) are all made of nitrile rubber.

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