CN215980907U

CN215980907U - Fluorine lined 300LB high pressure plug valve

Info

Publication number: CN215980907U
Application number: CN202121736029.8U
Authority: CN
Inventors: 朱炜健; 朱孝有
Original assignee: Youfu Tight Pipe Valve Group Co ltd
Current assignee: Youfu Tight Pipe Valve Group Co ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2022-03-08
Anticipated expiration: 2031-07-29

Abstract

The utility model relates to a fluorine-lined 300LB high-pressure plug valve, which comprises a valve body, a valve cover, a plug body and a valve rod, wherein the valve body is internally provided with a valve cavity; at least one O-shaped ring which is vertically distributed is arranged between the outer side wall of the conical sealing part and the inner side wall of the conical sealing hole. The utility model has reasonable structural design, the valve cover, the valve body and the valve rod are sealed by adopting conical sealing, and the O-shaped ring is arranged at the conical sealing part, thereby effectively ensuring the sealing and preventing the medium from leaking.

Description

Fluorine lined 300LB high pressure plug valve

The technical field is as follows:

the utility model relates to a fluorine-lined 300LB high-pressure plug valve.

Background art:

the plug valve is a valve which uses a plug body with a through hole as an opening and closing piece, and the plug body is driven along with a valve rod to realize the opening and closing actions. The plug valve has the advantages of rapid opening and closing, small fluid resistance and sealing structure for sealing the edge surface of the flow channel, and when the valve is opened, the plug body and the sealing surface of the valve body are completely avoided from the medium, so the plug valve can also be used for the medium with suspended particles. However, in the existing plug valve, the sealing among the valve rod, the valve cover and the valve body is realized by extruding packing, and the sealing structure is not reasonable enough and is easy to leak.

The utility model has the following contents:

the utility model aims at improving the problems in the prior art, namely the utility model aims to provide a fluorine-lined 300LB high-pressure plug valve which is reasonable in design and improves the sealing effect.

In order to achieve the purpose, the utility model adopts the technical scheme that: the utility model provides a lining fluorine 300LB high-pressure plug valve, is provided with the valve body of valve pocket, sets up at valve body middle part upper end valve gap, the cock body of setting in the valve pocket inside, is connected and runs through the valve rod of valve gap with the cock body, the one end outer wall that the valve rod is close to the cock body is equipped with toper sealing, the outside cover of toper sealing is equipped with the sealing member, the middle part of sealing member is equipped with and is used for the toper sealing hole that matches with toper sealing, and the upside of sealing member is equipped with and is used for pressing the sealing member to establish in the compressing tightly of toper sealing.

Furthermore, at least one O-shaped ring which is vertically distributed is arranged between the outer side wall of the conical sealing part and the inner side wall of the conical sealing hole.

Furthermore, the outer side wall of the conical sealing part is provided with at least one annular groove corresponding to the position of at least one O-shaped ring, and the O-shaped ring is embedded in the annular groove.

Furthermore, the sealing element comprises a conical sealing element body, a conical sealing hole is formed in the middle of the sealing element body, and an abdicating groove used for containing the pressing element is annularly formed in the outer side of the sealing element body.

Furthermore, the pressing piece comprises an annular gland and an adjusting screw, and a conical hole part matched with the conical surface of the sealing piece body is formed in the gland; the adjusting screw penetrates through the valve cover along a vertical thread, and the bottom surface of the adjusting screw is abutted to the top surface of the gland.

Furthermore, an annular flange is arranged on the outer edge of the upper end of the abdicating groove; the upper end of the middle part of the valve body is provided with an annular supporting step, and the bottom surface of the annular flange is abutted against the step surface of the supporting step; the bottom surface of the valve cover is abutted against the top surface of the annular flange.

Furthermore, the outer wall of the plug body, the outer wall of the conical sealing part, the inner wall of the valve body and the flange surfaces at two sides are all provided with fluorine lining layers.

Further, annular dovetail grooves are formed in the inner wall of the valve body and the flange surfaces on the two sides of the valve body; and a convex ring used for being clamped and matched with the dovetail groove is arranged on one surface of the fluorine lining layer, which is contacted with the valve body.

Furthermore, the lateral wall of valve chamber is equipped with a plurality of and is circumference equipartition and be used for with cock body matched with sealed convex part, the cross-section of sealed convex part is the arc form.

Compared with the prior art, the utility model has the following effects: the utility model has reasonable structural design, the valve cover, the valve body and the valve rod are sealed by adopting conical sealing, and the O-shaped ring is arranged at the conical sealing part, thereby effectively ensuring the sealing and preventing the medium from leaking.

Description of the drawings:

FIG. 1 is a schematic front sectional view of an embodiment of the present invention;

FIG. 2 is an enlarged schematic view at A in FIG. 1;

FIG. 3 is a side sectional configuration of an embodiment of the present invention;

FIG. 4 is a schematic view of a top view configuration of a valve body in an embodiment of the present invention;

FIG. 5 is a schematic perspective view of an embodiment of the present invention;

FIG. 6 is a schematic cross-sectional front view of a seal in an embodiment of the utility model.

The specific implementation mode is as follows:

the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 to 6, the fluorine-lined 300LB high-pressure plug valve of the present invention comprises a valve body 2 having a valve cavity 1 therein, a valve cap 3 disposed at an upper end of a middle portion of the valve body 2, a plug body 4 disposed inside the valve cavity 1, and a valve rod 5 connected to the plug body 4 and penetrating through the valve cap 3, wherein an input flow channel 6 is disposed at one end of the interior of the valve body 2, an output flow channel 7 is disposed at the other end of the interior of the valve body 2, the input flow channel 6 and the output flow channel 7 are both communicated with the valve cavity 1, a medium through hole 16 is disposed at a middle portion of the plug body, a tapered sealing portion 8 is disposed on an outer wall of one end of the valve rod 5 close to the plug body 4, a sealing member 9 is sleeved on an outer side of the tapered sealing portion 8, a tapered sealing hole 90 for being matched with the tapered sealing portion 8 is disposed at a middle portion of the sealing member 9, a pressing member for pressing the sealing member 9 against the tapered sealing portion 8 is disposed on an upper side of the sealing hole, so that an inner wall of the tapered sealing portion is tightly attached to a tapered surface of the tapered sealing portion, the sealing effect is improved.

In this embodiment, two O-rings 10 vertically distributed are disposed between the outer sidewall of the tapered sealing portion 8 and the inner sidewall of the tapered sealing hole 90, so as to further ensure that the sealing member and the tapered sealing portion have good sealing performance.

In this embodiment, two annular grooves corresponding to the positions of the two O-rings 10 are formed on the outer side wall of the conical sealing portion 8, and the O-rings 10 are embedded in the annular grooves.

In this embodiment, as shown in fig. 6, the sealing element 9 includes a conical sealing element body 91, a conical sealing hole 90 that penetrates vertically is formed in the middle of the sealing element body 91, and an abdicating groove 92 for accommodating a pressing element is annularly formed on the outer side of the sealing element body 91; the pressing piece comprises a ring-shaped pressing cover 11 and an adjusting screw 12, and a conical hole part matched with the conical surface of the sealing piece body 91 is formed in the pressing cover 11; the adjusting screw 12 penetrates through the valve cover 3 along a vertical thread, and the bottom surface of the adjusting screw 12 is abutted with the top surface of the gland 11. When the sealing device is used, the inner wall of the conical sealing hole 90 is matched with the conical surface of the conical sealing part 8, the gland 3 is matched with the conical surface of the sealing element body 91 through the conical hole part, the adjusting screw 12 pushes the gland 11 to press the sealing element 9 downwards, so that the conical sealing hole 90 in the middle of the sealing element body 91 is tightly attached to the conical surface of the conical sealing part 8, and a good sealing effect is achieved.

In this embodiment, an annular flange 93 is disposed on an outer edge of an upper end of the abdicating groove 92; the upper end of the middle part of the valve body 2 is provided with an annular supporting step 13, and the bottom surface of the annular flange 93 is abutted against the step surface of the supporting step 13; the bottom surface of the valve cover 3 is abutted against the top surface of the annular flange 93, and the annular flange is pressed tightly by the valve cover, so that the fixing effect of the whole sealing element is further improved.

In this embodiment, the outer wall of the plug body 4, the outer wall of the conical sealing portion 8, the inner wall of the valve body 2 and the flange surfaces at the two sides are all provided with fluorine lining layers 14, and the fluorine lining layers isolate the metal piece from corrosive media, so that the service life of the valve is prolonged.

In this embodiment, the inner wall and the flange surfaces at both sides of the valve body are provided with annular dovetail grooves (not shown in the figure); and a convex ring (not shown in the figure) which is used for being matched with the dovetail groove in a clamping way is arranged on one surface of the fluorine lining layer, which is contacted with the valve body. The fluorine lining layer and the valve body are clamped and connected through the convex ring and the dovetail groove, so that the fluorine material is uniform in shrinkage and strong in adhesive force, and negative pressure and shrinkage are effectively prevented.

In this embodiment, the shape of the valve chamber is adapted to the shape of the plug body, the side wall of the valve chamber 1 is provided with a plurality of circumferentially uniformly distributed sealing convex portions 17 for matching with the plug body, and the cross section of each sealing convex portion is arc-shaped, as shown in fig. 4. Through set up sealed convex part in the valve pocket, the outer wall of cock body cooperatees with sealed convex part and realizes sealed, reducible traditional sealed face area like this effectively reduces the opening moment of cock body.

In this embodiment, the valve body, the plug body, the valve cover or other places needing sealing all adopt high-pressure sealing structures, and the strength and the sealing strength test of 300LB are satisfied.

In this embodiment, the valve further comprises a support 15, the support 15 is located on the upper side of the valve body 2, the middle portion of the valve rod 5 rotatably penetrates through the support 15, and the left end and the right end of the support 15 are locked on the peripheral side portions of flanges at the two ends of the valve body 2 through bolts. The valve cover is fixedly connected with the valve body through bolts.

In this embodiment, the tapered sealing portion, the sealing member body, the tapered sealing hole, and the tapered hole portion are all small in size at the upper end and large in size at the lower end, and have the same taper, thereby ensuring good sealing.

If the utility model discloses or relates to parts or structures which are fixedly connected to each other, the fixedly connected parts can be understood as follows, unless otherwise stated: a detachable fixed connection (for example using bolts or screws) is also understood as: non-detachable fixed connections (e.g. riveting, welding), but of course, fixed connections to each other may also be replaced by one-piece structures (e.g. manufactured integrally using a casting process) (unless it is obviously impossible to use an integral forming process).

In addition, terms used in any technical solutions disclosed in the present invention to indicate positional relationships or shapes include approximate, similar or approximate states or shapes unless otherwise stated.

Any part provided by the utility model can be assembled by a plurality of independent components or can be manufactured by an integral forming process.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention and not to limit it; although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art will understand that: modifications to the specific embodiments of the utility model or equivalent substitutions for parts of the technical features may be made; without departing from the spirit of the present invention, it is intended to cover all aspects of the utility model as defined by the appended claims.

Claims

1. A fluorine lined 300LB high pressure plug valve is characterized in that: including inside valve body, the valve gap that is provided with the valve pocket, sets up at valve pocket middle part upper end, set up the cock body inside, be connected and run through the valve rod of valve gap with the cock body, the one end outer wall that the valve rod is close to the cock body is equipped with the toper sealing, the outside cover of toper sealing is equipped with the sealing member, the middle part of sealing member is equipped with and is used for the toper sealing matched with toper sealing, and the upside of sealing member is equipped with and is used for pressing the sealing member to establish the piece that compresses tightly in toper sealing.

2. The fluorine lined 300LB high pressure plug valve according to claim 1, wherein: at least one O-shaped ring which is vertically distributed is arranged between the outer side wall of the conical sealing part and the inner side wall of the conical sealing hole.

3. The fluorine lined 300LB high pressure plug valve according to claim 2, wherein: the outer side wall of the conical sealing part is provided with at least one annular groove corresponding to the position of at least one O-shaped ring, and the O-shaped ring is embedded in the annular groove.

4. The fluorine lined 300LB high pressure plug valve according to claim 1, wherein: the sealing element comprises a conical sealing element body, a conical sealing hole is formed in the middle of the sealing element body, and an abdicating groove used for containing the pressing element is annularly formed in the outer side of the sealing element body.

5. The fluorine lined 300LB high pressure plug valve according to claim 4, wherein: the pressing piece comprises an annular gland and an adjusting screw, and a conical hole part matched with the conical surface of the sealing piece body is formed in the gland; the adjusting screw penetrates through the valve cover along a vertical thread, and the bottom surface of the adjusting screw is abutted to the top surface of the gland.

6. The fluorine lined 300LB high pressure plug valve according to claim 4, wherein: an annular flange is arranged on the outer edge of the upper end of the abdicating groove; the upper end of the middle part of the valve body is provided with an annular supporting step, and the bottom surface of the annular flange is abutted against the step surface of the supporting step; the bottom surface of the valve cover is abutted against the top surface of the annular flange.

7. The fluorine lined 300LB high pressure plug valve according to claim 1, wherein: and fluorine lining layers are arranged on the outer wall of the plug body, the outer wall of the conical sealing part, the inner wall of the valve body and the flange surfaces at two sides.

8. The fluorine lined 300LB high pressure plug valve of claim 7, wherein: annular dovetail grooves are formed in the inner wall of the valve body and the flange surfaces on the two sides of the valve body; and a convex ring used for being clamped and matched with the dovetail groove is arranged on one surface of the fluorine lining layer, which is contacted with the valve body.

9. The fluorine lined 300LB high pressure plug valve according to claim 1, wherein: the lateral wall of valve chamber is equipped with a plurality of and is circumference equipartition and be used for with cock body matched with sealed convex part, the cross-section of sealed convex part is the arc form.