CN211474894U - Butterfly valve with good sealing performance - Google Patents
Butterfly valve with good sealing performance Download PDFInfo
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- CN211474894U CN211474894U CN201922065523.5U CN201922065523U CN211474894U CN 211474894 U CN211474894 U CN 211474894U CN 201922065523 U CN201922065523 U CN 201922065523U CN 211474894 U CN211474894 U CN 211474894U
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Abstract
The utility model discloses a butterfly valve with good sealing performance, including valve body, valve rod and valve disc, install the valve disc sealing member on the valve disc, the annular valve disc sealing member that is includes the installation department that is located the inner periphery and the sealing that is located the periphery, the installation department inlays the dress on the valve disc and links firmly with the valve disc through the dish lid, the sealing is located the valve disc periphery, this sealing is hollow gasbag-shaped, the outer peripheral face of gasbag-shaped sealing is the valve disc sealing face, joint concave part is equipped with in the installation department and the left and right sides junction of sealing; the valve body is embedded with an elastic valve seat through a pressing sleeve, the annular elastic valve seat comprises an elastic ring and a hard ring sheet, the section of the elastic ring is U-shaped, a U-shaped opening of the section of the elastic ring faces the outer circumference of the elastic ring, the inner circumferential surface of the elastic ring is a valve seat sealing surface, and the hard ring sheet is embedded in the U-shaped opening of the elastic ring. Adopt the utility model discloses a butterfly valve with good sealing performance enables to seal and continuously keeps good laminating between vice two sealed faces to improve sealing performance.
Description
Technical Field
The utility model relates to a valve especially relates to a butterfly valve's improvement.
Background
The butterfly valve is mainly composed of a valve body, a valve rod, a valve disc arranged on the valve rod and a valve seat arranged on the valve body and forming a sealing pair with the periphery of the valve disc, and the butterfly valve is opened and closed by the valve rod with the valve disc rotating in a reciprocating mode by 90 degrees. The original butterfly valve is only a simple and loosely closed baffle valve, usually plays a role in flow regulation and damping in a water pipeline system, along with the technical progress, the structure of the butterfly valve is gradually improved, the butterfly valve is developed into a plurality of structural forms such as a center sealing butterfly valve, a single eccentric butterfly valve, a double eccentric butterfly valve, a triple eccentric butterfly valve and the like from the simple baffle valve, and the sealing performance of the butterfly valve is greatly improved due to continuous improvement on the material and the sealing structure of a sealing surface. The elastic material is used as the sealing pair material, the elastic material of the sealing pair is extruded to generate elastic deformation so as to realize sealing, the main sealing form of the conventional butterfly valve is one of the main sealing forms, and because the extrusion and the friction between two sealing surfaces of the sealing pair in the opening and closing process of the valve, the sealing surfaces can be damaged after the valve is used for a period of time, the two sealing surfaces of the sealing pair are not tightly attached to form leakage, the sealing performance of the butterfly valve is difficult to maintain for a long time, and the butterfly valve is mostly used in a low-pressure working condition.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that a butterfly valve with good sealing performance is provided to the aforesaid that exists to prior art is not enough, it enables to seal and continuously keeps good laminating between two sealed faces to improve sealing performance.
In order to solve the technical problem, the utility model discloses a butterfly valve with good sealing performance, including valve body, rotation support valve rod on the valve body and the valve disc that links firmly on the valve rod install the valve disc sealing member on the valve disc, this valve disc sealing member is cyclic annular, is cyclic annular valve disc sealing member including the installation department that is located the inner periphery and the sealing that is located the periphery, the installation department inlays and adorns on the valve disc and links firmly with the valve disc through the dish lid, the sealing is located the valve disc periphery, and this sealing is hollow gasbag form, and the outer peripheral face of gasbag form sealing is the sealing surface of valve disc, is equipped with joint concave part about the junction of installation department and sealing; the valve body is embedded with an elastic valve seat through a pressing sleeve, the elastic valve seat is annular, the annular elastic valve seat comprises an elastic ring and a hard ring piece, the section of the elastic ring is U-shaped, a U-shaped opening of the section of the elastic ring faces the outer circumference of the elastic ring, the inner circumferential surface of the elastic ring is a valve seat sealing surface, and the hard ring piece is embedded in the U-shaped opening of the elastic ring.
In the structure, because the valve disc is provided with the valve disc sealing element which is annular and comprises a mounting part positioned on the inner periphery and a sealing part positioned on the outer periphery, the mounting part is embedded on the valve disc and is fixedly connected with the valve disc through the disc cover, the sealing part is positioned on the outer periphery of the valve disc and is hollow airbag-shaped, the outer peripheral surface of the airbag-shaped sealing part is a valve disc sealing surface, clamping concave parts are arranged at the left and right connecting parts of the mounting part and the sealing part, the valve disc sealing element takes the hollow airbag-shaped body as the sealing part, the outer peripheral surface of the valve disc sealing part is a sealing surface attached to the valve seat, compared with the conventional sealing part which is purely made of elastic materials, the hollow airbag-shaped sealing part has better elastic deformation capacity, when the valve is closed, the sealing part is pressed to increase the internal pressure of the airbag, and the pressure forms positive pressure between the sealing surface and the valve seat, the sealing surface of the valve disc can be better jointed with the valve seat to achieve the sealing purpose, the side surface of the air bag-shaped sealing part can generate the inward concave trend under the action of liquid pressure at the liquid inlet side, the sealing part can not generate displacement due to the liquid pressure at the liquid inlet side because a certain positive pressure is generated between the sealing surface of the valve disc and the sealing surface of the valve seat, which are jointed with the valve seat and are in the periphery of the hollow air bag-shaped sealing part, the liquid pressure at the liquid inlet side can press the side surface of the sealing part to increase the air pressure in the air bag, correspondingly, the positive pressure between the sealing surface of the peripheral valve disc of the sealing part and the sealing surface of the valve seat is further increased, the sealing surface of the valve disc of the sealing part and the sealing surface of the valve seat are better jointed, the sealing performance of the valve is improved, and even if, higher feed liquor side liquid pressure more is favorable to promoting the sealing performance of valve for this butterfly valve can not only be used for the low pressure operating mode, also can be applied to the use occasion of well higher pressure, has also guaranteed to keep good laminating between the vice two sealed faces of sealing, improves sealing performance.
The elastic valve seat is embedded on the valve body through the pressing sleeve, the elastic valve seat is annular, the annular elastic valve seat comprises an elastic ring and a hard ring piece, the section of the elastic ring is U-shaped, a U-shaped opening of the section of the elastic ring faces the outer circumference of the elastic ring, the inner circumferential surface of the elastic ring is a valve seat sealing surface, the hard ring piece is embedded in the U-shaped opening of the elastic ring, the elastic valve seat is embedded between the valve body and the pressing sleeve through the pressing sleeve, the valve seat is convenient to install and maintain, and the hard ring piece embedded in the U-shaped opening of the elastic ring provides framework support for the elastic ring, the inner circumference of which serves as the valve seat sealing surface, so that the elastic valve seat meets the elastic requirement as the valve seat sealing surface, has necessary integral rigidity.
The utility model discloses a preferred embodiment valve disc and dish are covered and are equipped with the opening annular corresponding with valve disc sealing member installation department cross-section, and the bulge that the periphery of valve disc and opening annular are connected corresponds to the joint recess of valve disc sealing member one side, and the bulge that the periphery of dish lid and opening annular are connected corresponds to the joint recess of valve disc sealing member opposite side. By adopting the embodiment, the sealing element of the valve disc is firmly installed, the clamping concave parts on the two sides of the sealing element are respectively inserted by the convex parts on the valve disc and the convex parts on the disc cover, the sealing element of the valve disc cannot be loosened and displaced when the valve disc is opened and closed or is acted by liquid pressure under the closing state of the valve disc, and the reliability and the durability of the valve sealing are ensured.
In another preferred embodiment of the present invention, the mounting portion of the valve disc seal has a circular cross-section. By adopting the embodiment, the cross sections of the opening ring grooves on the valve disc and the disc cover are correspondingly arc-shaped, and the mounting part of the sealing element of the valve disc, the valve disc and the disc cover are not concentrated by stress, so that the sealing element of the valve disc can be reliably mounted, and the sealing element of the valve disc, the valve disc and the disc cover are not damaged by stress concentration after being stressed.
The utility model discloses a still another preferred embodiment, the generating line of the sealing periphery that is the valve disc sealing surface is the straight line, and the both sides of sealing periphery are passed through the circular arc and are connected with the joint recess that corresponds. By adopting the embodiment, the peripheral surface of the sealing part is a conical side surface, the sealing part can keep the width of a required joint surface between the sealing part and the valve seat so as to ensure the sealing performance, and the two sides of the periphery of the sealing part are connected with the corresponding clamping concave parts through arcs so as to enable the periphery of the sealing part of the whole valve disc to be smoothly transited and connected, so that the sealing part is not easy to damage and has long service life.
In a further preferred embodiment of the present invention, the hard ring plate is a spring steel plate. By adopting the embodiment, the hard ring plate made of the spring steel plate is not easy to deform, and the normal working form of the elastic valve seat can be maintained and cannot be changed under the influence of working pressure.
In another preferred embodiment of the present invention, the generatrix of the inner circumferential surface of the elastic ring serving as the valve seat sealing surface is a straight line. By adopting the embodiment, the formed valve seat sealing surface is a conical side surface, can be correspondingly attached to the valve disc sealing surface well, and is relatively convenient to manufacture.
In a further preferred embodiment of the present invention, the generatrix of the inner circumferential surface of the elastic ring serving as the sealing surface of the valve seat is a curved line, and the curved line protrudes toward the center line of the elastic ring. By adopting the embodiment, the formed valve seat sealing surface protrudes towards the sealing surface direction of the valve disc, so that the valve seat sealing surface is more favorable for being tightly attached to each other, and the sealing performance is ensured.
Drawings
The butterfly valve with good sealing performance according to the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of an embodiment of a butterfly valve with good sealing performance according to the present invention;
FIG. 2 is an enlarged view of portion I of the structure of FIG. 1;
FIG. 3 is a schematic cross-sectional view of the elastomeric valve seat of the structure of FIG. 1;
fig. 4 is a schematic cross-sectional view of a valve disc seal of the configuration shown in fig. 1.
In the figure: 1-valve body, 2-pressing sleeve, 3-elastic valve seat, 4-valve disc sealing element, 5-valve disc, 6-valve rod, 7-disc cover, 8-convex part, 9-elastic ring, 10-hard ring sheet, 11-valve seat sealing surface, 12-sealing part, 13-valve disc sealing surface, 14-clamping concave part and 15-mounting part.
Detailed Description
In the butterfly valve with good sealing performance shown in fig. 1, a valve rod 6 is rotatably supported on a valve body 1, a valve rod sealing device is installed between the valve rod 6 and the valve body 1, and an operating handwheel or other driving piece (not shown in the figure) is installed on the extending end of the valve rod 6 penetrating through the valve body 1 to drive a valve disc 5 to open and close.
Referring to fig. 2, a valve disc 5 is fixedly connected to a valve rod 6, a valve disc sealing member 4 is installed on the valve disc 5, an elastic valve seat 3 is embedded in the valve body 1 through a pressing sleeve 2, the valve disc sealing member 4 and the elastic valve seat 3 form a sealing pair, the valve body 1 and the sealing pair can be made of wear-resistant rubber, and the valve rod 6 and the sealing pair are located at different axial positions on the valve body 1.
The valve disc sealing member 4 is annular, referring to fig. 4, the annular valve disc sealing member 4 comprises a mounting portion 15 positioned on the inner periphery and a sealing portion 12 positioned on the outer periphery, clamping concave portions 14 are arranged at the left and right connecting positions of the mounting portion 15 and the sealing portion 12, the cross section of the mounting portion 15 is circular, the sealing portion 12 is hollow and air bag-shaped, the outer peripheral surface of the air bag-shaped sealing portion 12 is a valve disc sealing surface 13, a generatrix of the outer periphery of the sealing portion 12, which is the valve disc sealing surface 13, is a straight line, and two sides of the outer periphery of the sealing portion 12 are connected with the corresponding clamping concave portions 14 through circular arcs, so that the.
The elastic valve seat 3 is annular, referring to fig. 3, the annular elastic valve seat 3 includes an elastic ring 9 with a U-shaped cross section and a hard ring piece 10, the U-shaped opening of the cross section of the elastic ring 9 faces the outer circumference of the elastic ring 9, the inner circumferential surface of the elastic ring 9 is a valve seat sealing surface 11, the generatrix of the inner circumferential surface of the elastic ring 9 as the valve seat sealing surface 11 is preferably a straight line, the hard ring piece 10 is embedded in the U-shaped opening of the elastic ring 9, and the hard ring piece 10 is preferably a spring steel piece.
As shown in fig. 2, the mounting portion 15 of the valve disc sealing member 4 is embedded on the valve disc 5 and fixedly connected with the valve disc 5 through the disc cover 7, an opening ring groove corresponding to the cross section of the mounting portion 15 of the embedded valve disc sealing member 4 is arranged on the valve disc 5 and the disc cover 7, a convex portion 8 of the periphery of the valve disc 5 connected with the opening ring groove corresponds to a clamping concave portion 14 on one side of the valve disc sealing member 4, and a convex portion 8 of the periphery of the disc cover 7 connected with the opening ring groove corresponds to a clamping concave portion 14 on the other side of the valve disc sealing member 4, so that reliable mounting of the valve disc sealing member 4 is ensured, the sealing portion 12 is positioned on the periphery of the valve disc 5, when the valve is closed, the periphery of the sealing portion 12 of the sealing face 13 is attached to the inner peripheral surface of the elastic ring 9 of the valve seat sealing face 11.
The above description has been presented only for the purpose of illustrating certain preferred embodiments of the invention, and it is not to be taken as a limitation on the invention, as many modifications and variations are possible. As described above, the generatrix of the inner circumferential surface of the elastic ring 9 serving as the valve seat sealing surface 11 may be an arc line instead of a straight line, and the arc line protrudes toward the center line of the elastic ring 9; the hard ring plate 10 may be a member made of stainless steel or other materials with certain strength and rigidity, instead of being made of a spring steel plate. Therefore, any improvement and changes made on the basis of the basic principle of the present invention should be considered as falling within the protection scope of the present invention.
Claims (7)
1. A butterfly valve with good sealing performance, comprising a valve body (1), a valve rod (6) rotatably supported on the valve body (1) and a valve disc (5) fixedly connected on the valve rod (6), characterized in that: the sealing structure is characterized in that a valve disc sealing piece (4) is installed on the valve disc (5), the valve disc sealing piece (4) is annular, the annular valve disc sealing piece (4) comprises an installation part (15) located on the inner periphery and a sealing part (12) located on the outer periphery, the installation part (15) is embedded on the valve disc (5) and fixedly connected with the valve disc (5) through a disc cover (7), the sealing part (12) is located on the outer periphery of the valve disc (5), the sealing part (12) is in a hollow air-bag shape, the outer peripheral surface of the air-bag-shaped sealing part (12) is a sealing surface (13), and clamping concave parts (14) are arranged at the left and right connection positions of the installation part (15) and the sealing part (; an elastic valve seat (3) is embedded in the valve body (1) through a pressing sleeve (2), the elastic valve seat (3) is annular, the annular elastic valve seat (3) comprises an elastic ring (9) with a U-shaped section and a hard ring piece (10), the U-shaped opening of the section of the elastic ring (9) faces the outer circumference of the elastic ring (9), the inner circumferential surface of the elastic ring (9) is a valve seat sealing surface (11), and the hard ring piece (10) is embedded in the U-shaped opening of the elastic ring (9).
2. The butterfly valve with good sealing performance according to claim 1, wherein: be equipped with on valve disc (5) and dish lid (7) with valve disc sealing member (4) installation department (15) corresponding opening annular in cross-section, bulge (8) that the periphery of valve disc (5) and opening annular are connected are corresponding to joint concave part (14) of valve disc sealing member (4) one side, and bulge (8) that the periphery of dish lid (7) and opening annular are connected are corresponding to joint concave part (14) of valve disc sealing member (4) opposite side.
3. A butterfly valve with good sealing properties according to claim 1 or 2, characterized in that: the section of the mounting part (15) of the valve disc sealing member (4) is circular.
4. The butterfly valve with good sealing performance according to claim 1, wherein: the generatrix of the periphery of the sealing part (12) as the sealing surface (13) of the valve disc is a straight line, and two sides of the periphery of the sealing part (12) are connected with the corresponding clamping concave parts (14) through arcs.
5. The butterfly valve with good sealing performance according to claim 1, wherein: the hard ring plate (10) is a spring steel plate.
6. The butterfly valve with good sealing performance according to claim 1, wherein: the generatrix of the inner circumferential surface of the elastic ring (9) as the valve seat sealing surface (11) is a straight line.
7. The butterfly valve with good sealing performance according to claim 1, wherein: and a generatrix of the inner circumferential surface of the elastic ring (9) as the valve seat sealing surface (11) is an arc line, and the arc line protrudes towards the central line direction of the elastic ring (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922065523.5U CN211474894U (en) | 2019-11-26 | 2019-11-26 | Butterfly valve with good sealing performance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922065523.5U CN211474894U (en) | 2019-11-26 | 2019-11-26 | Butterfly valve with good sealing performance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211474894U true CN211474894U (en) | 2020-09-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922065523.5U Active CN211474894U (en) | 2019-11-26 | 2019-11-26 | Butterfly valve with good sealing performance |
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| CN (1) | CN211474894U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145604A (en) * | 2020-10-23 | 2020-12-29 | 河北机电职业技术学院 | Adjustable hydraulic shock absorber |
| CN114183542A (en) * | 2021-07-28 | 2022-03-15 | 杰锋汽车动力系统股份有限公司 | New forms of energy fuel cell car prevents leaking butterfly valve |
-
2019
- 2019-11-26 CN CN201922065523.5U patent/CN211474894U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112145604A (en) * | 2020-10-23 | 2020-12-29 | 河北机电职业技术学院 | Adjustable hydraulic shock absorber |
| CN114183542A (en) * | 2021-07-28 | 2022-03-15 | 杰锋汽车动力系统股份有限公司 | New forms of energy fuel cell car prevents leaking butterfly valve |
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