Full-bore double-gland fluorine-lined high-pressure plug valve

Abstract

The full-bore double-gland fluorine-lined high-pressure plug valve comprises a valve body and a valve cavity arranged in the valve body, an input channel and an output channel are arranged on the two sides of the valve cavity respectively, a plug body is arranged in the valve cavity, a through opening is formed in the plug body, and the valve cavity is provided with a through hole. A through opening is formed in the valve cavity, the diameter of the through opening is consistent with the diameter of the input channel and the diameter of the output channel, an opening is formed in the upper portion of the valve cavity, a plug body gland, a gland and a valve deck are sequentially arranged at the opening of the valve cavity from top to bottom, a plug body shaft is arranged above the plug body, and the plug body shaft upwards penetrates through the valve deck, the gland and the plug body gland and extends outwards. The valve is reasonable in design and simple in structure, the plug body gland, the gland and the valve deck are reasonable in structural design and convenient and stable to install, the inner diameter of the plug body port, the inner diameter of the input pipeline and the inner diameter of the output pipeline are set to be the same, the full-bore structure of the valve is achieved, the whole flow channel area is kept consistent, the pipeline flow is improved, the pressure loss is reduced, and the large-flow use requirement is met.

Description

Technical Field

[0001] This utility model relates to a full-bore double-cap fluoropolymer-lined high-pressure plug valve. Background Technology

[0002] A plug valve is a simple valve that opens and closes quickly with relatively low resistance. Its working principle is that the plug rotates around the valve body's centerline, and the opening and closing are achieved by the correspondence between the orifice on the plug and the orifices at both ends of the valve body. Traditional plug valves use a Venturi flow channel (i.e., the orifice diameter on the plug is smaller than the internal flow channel diameter of the valve body, resulting in a smaller flow area at the plug). During use, these valves often fail to achieve the required flow rate and are not well-suited for high-flow applications. Utility Model Content

[0003] This invention addresses the aforementioned problem by providing a full-bore double-compression fluoropolymer-lined high-pressure plug valve with a reasonable structural design that helps improve pipeline flow rate.

[0004] This utility model is constructed as follows: it includes a valve body and a valve cavity disposed inside the valve body. An input channel and an output channel are respectively disposed on both sides of the valve cavity. A plug is disposed inside the valve cavity. The plug has an opening with a diameter that is the same as the diameter of the input channel and the output channel. The valve cavity has an opening at the top. From top to bottom, a plug cover, a cover, and a valve cover are disposed at the opening of the valve cavity. A plug shaft is disposed above the plug. The plug shaft passes through the valve cover, the cover, and the plug cover upwards and extends outwards.

[0005] Furthermore, the valve cavity opening edge has a wavy valve body flange, the valve cover is adapted to the shape of the valve body flange, and the valve cover and the valve body flange are connected by multiple valve cover fasteners.

[0006] Furthermore, the valve cover has a valve cover protrusion on the top, and the valve cover protrusion has a valve cover hole in the middle for the plug shaft to pass through. The valve cover protrusion and the pressure cover are connected by the pressure cover fastener.

[0007] Furthermore, valve cover fixing posts are provided in front of and behind the valve cover protrusion, the upper part of the plug shaft is provided with an upper stepped surface, the lower part of the plug cover is provided with an abutment surface for limiting the upper stepped surface, and the plug cover is limited on the valve cover fixing posts by plug cover fasteners.

[0008] Furthermore, the valve cover includes a valve cover body and an inner valve cover layer disposed within the valve cover body. The lower surface of the valve cover body is provided with a large valve cover annular body, and a small valve cover annular body is provided below the valve cover annular body. The inner valve cover layer includes an inner layer disc and an annular groove disposed on the upper surface of the inner layer disc. The upper surface of the inner layer disc fits against the lower surface of the large valve cover annular body. The lower valve cover annular body cooperates with the annular groove. An inner layer tube is disposed in the middle of the annular groove, and the inner layer tube is located in the opening in the middle of the valve cover body.

[0009] Furthermore, the pressure cap has a pressure cap through hole in the middle for the plug shaft to pass through, and a pressure cap annular post is provided below the pressure cap, the pressure cap annular post being located between the valve cover hole on the valve cover and the plug shaft.

[0010] Furthermore, the plug cap has a plug cap through hole in the middle for the plug shaft to pass through.

[0011] Furthermore, the opening of the valve cavity includes a first sink groove and a second sink groove disposed in the middle of the first sink groove. A sink hole is provided on the bottom surface of the second sink groove. The inner layer of the valve cover is in cooperation with the bottom surface of the first sink groove and the inner wall of the second sink groove. The sink hole is in cooperation with the plug.

[0012] Furthermore, the plug body is provided with a fluorine lining layer on the outside, and the fluorine lining layer, the plug body, and the plug body shaft are integral.

[0013] Furthermore, the inner wall of the valve body is provided with a fluorine lining.

[0014] Compared with the prior art, this utility model has the following beneficial effects: The device has a simple structure, reasonable design, and is easy to use. By controlling the rotation of the plug shaft, the plug body is driven to rotate. When the port on the plug body is aligned and connected with the input and output pipes on the valve body, the plug valve is in the open state. The port, input channel, and output channel of the plug body form a full-bore flow channel. The cross-sectional area of ​​the entire flow channel is consistent, and there is no situation where the flow channel area is reduced in a certain place, realizing the full-bore structure of the valve. At this time, the pipeline flow rate can be increased, the pressure loss can be reduced, and the high flow rate requirement can be met. When the port on the plug body is disconnected, that is, when the non-port position on the plug body is aligned with the input and output pipes respectively, the plug body seals and blocks the input and output pipes. At this time, the plug valve is in the open state, and the liquid medium inside the valve body cannot pass through. Attached Figure Description

[0015] Figure 1 Three-dimensional representation of the present utility model Figure 1 ;

[0016] Figure 2 Three-dimensional representation of the present utility model Figure 2 ;

[0017] Figure 3 This is an exploded view of an embodiment of the present utility model;

[0018] Figure 4 This is a top view of an embodiment of the present utility model;

[0019] Figure 5 for Figure 4 Sectional view AA in the middle;

[0020] Figure 6 This is a schematic diagram of the valve cover structure in an embodiment of the present utility model. Figure 1 ;

[0021] Figure 7 This is a schematic diagram of the valve cover structure in an embodiment of the present utility model. Figure 2 ;

[0022] Figure 8 This is a schematic diagram of the valve body structure according to an embodiment of the present utility model;

[0023] Figure 9 This is a schematic diagram of the plug body, plug body shaft, and plug body fluoropolymer lining layer in an embodiment of the present invention. Detailed Implementation

[0024] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0025] Example: Figures 1-9 As shown, this embodiment provides a full-bore double-cap fluoropolymer-lined high-pressure plug valve, including a valve body 1 and a valve cavity 101 disposed inside the valve body. An input channel 102 and an output channel 103 are respectively disposed on both sides of the valve cavity. A plug 2 is disposed inside the valve cavity, and an opening 104 is formed on the plug. The diameter of the opening is the same as the diameter of the input and output channels. When the plug valve is opened, the opening of the plug, the input channel, and the output channel form a full-bore flow channel. The cross-sectional area of ​​the entire flow channel remains consistent throughout, and there is no reduction in the flow channel area at any point. In small cases, the valve achieves a full-bore structure, which can increase pipeline flow, reduce pressure loss, and meet the needs of large flow applications. The valve cavity has an opening 3 at the top, and from top to bottom, a plug cover 4, a cover 5, and a valve cover 6 are arranged at the opening of the valve cavity. A plug shaft 7 is provided above the plug 2, which passes through the valve cover, cover, and plug cover upwards and extends outwards. The plug shaft and plug are limited by the plug cover to prevent displacement, and the plug is limited by the valve cover. The cooperation structure of the plug cover, cover, and valve cover is reasonable and simple.

[0026] In this embodiment of the present invention, the valve cavity has a wavy valve body flange 105 at the opening edge, the valve cover is adapted to the shape of the valve body flange, and the valve cover and the valve body flange are connected by a plurality of valve cover fasteners 8; for example, eight valve cover fasteners may be provided.

[0027] In this embodiment of the utility model, the valve cover 6 has a valve cover protrusion 61 on the top, and a valve cover hole 62 for the plug shaft to pass through in the middle of the valve cover protrusion. The valve cover protrusion and the pressure cover are connected by the pressure cover fastener 9.

[0028] The aforementioned valve cover 62 hole includes a first valve cover hole 621 and a second valve cover hole 622. The second valve cover hole is disposed on the inner bottom surface of the first valve cover hole, and the diameter of the first valve cover hole is larger than that of the second valve cover hole.

[0029] In this embodiment of the utility model, the valve cover protrudes forward 61 and is provided with valve cover fixing post 63 at the rear. The upper part of the plug shaft 7 is provided with upper stepped surface 701. The lower part of the plug cover 4 is provided with abutment surface 41 for limiting the upper stepped surface. The plug cover is limited on the valve cover fixing post by two plug cover fasteners 42.

[0030] In this embodiment of the present invention, the valve cover 6 includes a valve cover body 64 and an inner valve cover layer 65 disposed within the valve cover body. The lower surface of the valve cover body is provided with a large valve cover annular body 641, and a small valve cover annular body 642 is provided below the valve cover annular body. The inner valve cover layer 65 includes an inner layer disc 651 and an annular groove 652 disposed on the upper surface of the inner layer disc. The upper surface of the inner layer disc is in contact with the lower surface of the large valve cover annular body. The lower valve cover annular body cooperates with the annular groove. An inner layer tube 653 is disposed in the middle of the annular groove. The inner layer tube extends upward into the valve cover hole in the middle of the valve cover body. The inner layer tube includes an upper tube section and a lower tube section. The diameter of the upper tube section is larger than that of the lower tube section. The upper tube section cooperates with the first valve cover hole, and the lower tube section cooperates with the second valve cover hole.

[0031] The inner layer of the valve cover mentioned above can be a fluorine-lined layer.

[0032] In this embodiment of the utility model, the pressure cap 5 is provided with a pressure cap through hole 51 for the plug shaft to pass through, and a pressure cap annular post 52 is provided below the pressure cap. The pressure cap annular post is located between the valve cover hole and the plug shaft on the valve cover.

[0033] In this embodiment of the utility model, the plug cover 4 is provided with a plug cover through hole 43 in the middle for the plug shaft to pass through.

[0034] In this embodiment of the present invention, the opening 3 of the valve cavity includes a first sink 301 and a second sink 302 disposed in the middle of the first sink. A sink hole 303 is provided on the bottom surface of the second sink. The inner layer of the valve cover is in cooperation with the bottom surface of the first sink and the inner wall of the second sink. The sink hole is in cooperation with the plug.

[0035] The aforementioned inner layer of the valve cover wraps around the middle lower surface of the valve cover body and the inner wall of the valve hole of the valve cover body.

[0036] The inner edge of the valve cover is provided with a valve cover groove 654, which is sealed and fitted with the bottom surface of the first sink and the inner wall of the second sink.

[0037] In this embodiment of the utility model, the plug body is provided with a fluorine-lined plug body layer 21 on the outside, and the fluorine-lined plug body layer, the plug body and the plug body shaft are integral.

[0038] In this embodiment of the utility model, the inner wall of the valve body 1 is provided with a fluoropolymer lining layer 106.

[0039] In this embodiment of the invention, grooves 702 are provided on both sides of the plug shaft extending from the plug body cap.

[0040] In this embodiment of the invention, the plug is cylindrical. The diameter of the upper surface of the plug is slightly larger than the diameter of the lower surface.

[0041] In this embodiment of the utility model, the plug body is covered with a fluoropolymer lining layer 21, which has the same shape as the plug body. A positioning ring 704 is provided on the upper part of the plug body shaft. The upper surface and lower surface of the positioning ring are an upper stepped surface 701 and a lower stepped surface 703, respectively. The upper stepped surface mates with the abutting surface of the plug body cap, and the lower stepped surface mates with the upper surface of the portion of the plug body shaft covered by the fluoropolymer lining layer and is flush with it.

[0042] The function of the fluoropolymer lining of the plug, the fluoropolymer lining of the valve body, and the fluoropolymer lining of the valve cover is to isolate the metal parts from corrosive media and increase the service life of the valve.

[0043] In this embodiment of the utility model, the plug body is rotatably engaged with the valve cavity of the valve body, and the plug body shaft is rotatably engaged with the valve cover, the pressure cover, and the plug body pressure cover.

[0044] In this embodiment of the utility model, the valve cover fastener, the gland fastener, and the plug gland fastener can be bolts.

[0045] In this embodiment of the invention, during operation: the plug body is rotated by controlling the rotation of the plug shaft. When the port on the plug body is aligned and connected with the input and output pipes on the valve body, the plug valve is in the open state. The port, input channel, and output channel of the plug body form a full-bore flow channel. The cross-sectional area of ​​the entire flow channel remains consistent, and there is no situation where the flow channel area is reduced in any place, realizing the full-bore structure of the valve. At this time, the pipeline flow rate can be increased, the pressure loss can be reduced, and the high flow rate requirement can be met. When the port on the plug body is disconnected, that is, when the non-port position on the plug body is aligned with the input and output pipes respectively, the plug body seals and blocks the input and output pipes. At this time, the plug valve is in the open state, and the liquid medium inside the valve body cannot pass through.

[0046] The valve body, plug, valve cover, or other parts that require sealing all adopt a high-pressure sealing structure, which will not be elaborated on here.

[0047] Unless otherwise stated, if any of the technical solutions disclosed in this utility model discloses a numerical range, then the disclosed numerical range is a preferred numerical range. Any person skilled in the art should understand that the preferred numerical range is merely one among many feasible numerical values ​​that has a more obvious or representative technical effect. Because there are many numerical values, it is impossible to list them all. Therefore, this utility model discloses only some numerical values ​​to illustrate the technical solutions of this utility model. Furthermore, the numerical values ​​listed above should not constitute a limitation on the scope of protection of this utility model.

[0048] Meanwhile, if the present invention discloses or relates to mutually fixedly connected parts or structural components, then unless otherwise stated, the fixed connection can be understood as: a fixed connection that can be detached (e.g., using bolts or screws), or a fixed connection that cannot be detached (e.g., riveting, welding). Of course, the mutually fixed connection can also be replaced by an integral structure (e.g., manufactured by integral molding using casting process) (except where it is obviously impossible to use an integral molding process).

[0049] In addition, unless otherwise stated, the terms used to indicate positional relationships or shapes in any of the technical solutions disclosed in this utility model above include states or shapes that are similar to, close to, or approximate with them.

[0050] Any component provided by this utility model can be assembled from multiple individual components, or it can be a single component manufactured by a one-piece molding process.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it; although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications can still be made to the specific implementation of this utility model or equivalent substitutions can be made to some technical features without departing from the spirit of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the technical solution claimed by this utility model.

Claims

1. A full-bore double-gland fluoropolymer-lined high-pressure plug valve, characterized in that, The device includes a valve body and a valve cavity disposed inside the valve body. An input channel and an output channel are respectively provided on both sides of the valve cavity. A plug is disposed inside the valve cavity. The plug has an opening with a diameter that is the same as the diameter of the input channel and the output channel. The valve cavity has an opening at the top. From top to bottom, a plug cover, a cover, and a valve cover are arranged at the opening of the valve cavity. A plug shaft is provided above the plug. The plug shaft passes through the valve cover, the cover, and the plug cover upwards and extends outwards.

2. The full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve cavity has a wavy valve body flange at the opening edge, and the valve cover is adapted to the shape of the valve body flange. The valve cover and the valve body flange are connected by multiple valve cover fasteners.

3. The full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve cover has a valve cover protrusion on the top, and the valve cover protrusion has a valve cover hole in the middle for the plug shaft to pass through. The valve cover protrusion and the pressure cover are connected by the pressure cover fastener.

4. The full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve cover protrusion has valve cover fixing posts at the front and rear, the upper part of the plug shaft has an upper stepped surface, the lower part of the plug cover has an abutment surface for limiting the upper stepped surface, and the plug cover is limited on the valve cover fixing posts by plug cover fasteners.

5. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve cover includes a valve cover body and an inner valve cover layer disposed within the valve cover body. The lower surface of the valve cover body is provided with a large valve cover annular body, and a small valve cover annular body is provided below the valve cover annular body. The inner valve cover layer includes an inner layer disc and an annular groove disposed on the upper surface of the inner layer disc. The upper surface of the inner layer disc fits against the lower surface of the large valve cover annular body. The lower valve cover annular body cooperates with the annular groove. An inner layer tube is disposed in the middle of the annular groove, and the inner layer tube is located in the opening in the middle of the valve cover body.

6. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 3, characterized in that, The pressure cap has a pressure cap through hole in the middle for the plug shaft to pass through, and a pressure cap annular post is provided below the pressure cap. The pressure cap annular post is located between the valve cover hole and the plug shaft on the valve cover.

7. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 4, characterized in that, The plug cover has a through hole in the middle for the plug shaft to pass through.

8. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve cavity opening includes a first sink groove and a second sink groove disposed in the middle of the first sink groove. A sink hole is provided on the bottom surface of the second sink groove. The inner layer of the valve cover is in cooperation with the bottom surface of the first sink groove and the inner wall of the second sink groove. The sink hole is in cooperation with the plug.

9. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The plug body is provided with a fluorine lining layer on the outside, and the fluorine lining layer, the plug body and the plug body shaft are integral.

10. A full-bore double-gland fluoropolymer-lined high-pressure plug valve according to claim 1, characterized in that, The valve body is lined with a fluorine layer.

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