CN115899310B - High-frequency metal hard sealing ball valve - Google Patents
High-frequency metal hard sealing ball valve Download PDFInfo
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- CN115899310B CN115899310B CN202310014971.0A CN202310014971A CN115899310B CN 115899310 B CN115899310 B CN 115899310B CN 202310014971 A CN202310014971 A CN 202310014971A CN 115899310 B CN115899310 B CN 115899310B
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- valve seat
- ball
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Abstract
The invention discloses a high-frequency metal hard sealing ball valve, which comprises a valve body, a valve ball, a valve cover, a valve rod, a valve body cap and a valve seat assembly, wherein the valve seat assembly comprises a valve seat bracket and a valve seat; the valve seat is characterized in that a circle of convex edges are arranged on the outer peripheral wall of the valve seat, a circle of notch for giving way to the convex edges is formed in the inner peripheral wall of the valve seat bracket, a butterfly spring is arranged between the convex edges and the valve body cap, the valve seat stretches into the valve body cap, and a third sealing ring for sealing the valve seat and the valve body cap is embedded in the outer peripheral wall of the valve seat, which stretches into the valve body cap. The design of the invention is ingenious in that a plurality of sealing rings are arranged in an effective space on the premise of ensuring pressure balance and convenient installation so as to protect the working environment of the bearing and the belleville spring.
Description
Technical Field
The invention relates to the technical field of valves, in particular to a high-frequency metal hard sealing ball valve.
Background
The ball valve, the opening and closing piece (ball) is driven by the valve rod, and rotates around the axis of the ball valve, thus being used for adjusting and controlling the fluid. In the prior petrochemical industry devices (such as PX devices, PO devices, PE devices and the like), the feeding and discharging valves of a plurality of reaction kettles all need frequent actions, the action frequency is generally between 50 ten thousand times and 250 ten thousand times per year according to the process production requirements, and the switching frequency is high.
Under the working condition of high-frequency operation, the medium is repeatedly flushed, so that the moving part of the valve is easy to fail, and the part is easy to be invaded by the medium to fail, so that the valve is easy to fail.
Disclosure of Invention
The invention mainly aims to provide a high-frequency metal hard sealing ball valve which can protect a butterfly spring from being invaded by a medium so as to cause failure.
In order to achieve the above purpose, the invention provides a high-frequency metal hard sealing ball valve, which comprises a valve body, a valve ball arranged in the valve body, a valve cover connected to the top of the valve body, a valve rod penetrating through the valve cover and connected with the valve ball, and two valve body caps respectively connected with an inlet end and an outlet end of the valve body, wherein the inlet end and the outlet end of the valve body are respectively provided with a valve seat assembly, the valve seat assembly comprises a valve seat bracket and a valve seat sleeved in the valve seat bracket, the valve seat and the valve ball form contact seal, a first sealing ring for sealing the valve seat bracket and the valve body is embedded on the peripheral wall of the valve seat bracket, and a second sealing ring for sealing the valve seat bracket and the valve seat is embedded on the inner peripheral wall of the valve seat bracket;
the valve seat is characterized in that a circle of convex edges are arranged on the outer peripheral wall of the valve seat, a circle of notch for giving way to the convex edges is formed in the inner peripheral wall of the valve seat bracket, a butterfly spring is arranged between the convex edges and the valve body cap, the valve seat stretches into the valve body cap, and a third sealing ring for sealing the valve seat and the valve body cap is embedded in the outer peripheral wall of the valve seat, which stretches into the valve body cap.
Further, a filling tetrafluoro pad is arranged in a space surrounded by the valve seat bracket, the valve body, the valve rod and the valve ball.
Further, an upper flexible bearing is arranged between the valve rod and the valve cover, and a fourth sealing ring for sealing the valve cover and the valve rod is embedded below the upper flexible bearing on the inner peripheral wall of the valve cover.
Further, a support column is arranged at the bottom of the valve ball, a flexible shaft bearing seat is arranged at the bottom of the valve body, the support column penetrates through the flexible shaft bearing seat and is provided with a lower flexible bearing between the flexible shaft bearing seat and the flexible shaft bearing seat, a fifth sealing ring for sealing the flexible shaft bearing seat and the support column is embedded above the lower flexible bearing seat on the inner peripheral wall of the flexible shaft bearing seat, and a sixth sealing ring for sealing the flexible shaft bearing seat and the valve body is embedded on the outer peripheral wall of the flexible shaft bearing seat.
Further, the wear-resistant sleeve is sleeved in the valve body cap, a clamping ring used for limiting the wear-resistant sleeve is clamped on the inner side of the wear-resistant sleeve on the inner peripheral wall of the valve body cap, and a seventh sealing ring used for sealing the valve body cap and the wear-resistant sleeve is further embedded on the inner peripheral wall of the valve body cap.
Further, the valve rod and the valve ball are of an integrally formed structure.
Further, the upper soft bearing and the lower soft bearing are made of gauze and a tetrafluoro coating sprayed on the gauze.
Further, the surface of the valve ball is sprayed with cemented carbide.
Further, the valve seat is made of stellite.
The beneficial effects of the invention are as follows:
according to the design of the invention, the belleville spring can provide inward elasticity, the valve seat can be pressed on the valve ball under the action of the elasticity of the belleville spring, so that not only is the sealing effect better, but also the pretightening force provided by the belleville spring for the valve seat is stable when the valve ball rotates, and the strain caused by the sudden increase of the surface pressure of the sealing surface due to coaxiality error can be reduced.
Drawings
FIG. 1 is a schematic structural view of a high frequency metal hard seal ball valve according to an embodiment of the present invention.
Fig. 2 is a cross-sectional view of a high frequency metal hard seal ball valve in accordance with an embodiment of the invention.
Fig. 3 is a partial perspective cutaway view of a high frequency metal hard seal ball valve in accordance with an embodiment of the invention.
Fig. 4 is a partial perspective sectional view of a high frequency metal hard seal ball valve according to an embodiment of the invention.
Fig. 5 is an enlarged view at a in fig. 2.
Reference numerals illustrate: 1. a valve body; 2. a valve ball; 3. a valve stem; 4. a valve cover; 5. a valve body cap; 6. a valve seat bracket; 7. a valve seat; 8. a belleville spring; 9. filling a tetrafluoro pad; 10. a soft bearing is arranged on the upper part; 11. a lower soft bearing; 12. a support column; 13. a flexible shaft bearing seat; 14. wear-resistant sleeve; 15. a clasp; 16. a rib; 17. a notch; 18. a first seal ring; 19. a second seal ring; 20. a third seal ring; 21. a fourth seal ring; 22. a fifth seal ring; 23. a sixth seal ring; 24. seventh sealing washer, 25, packing.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. Embodiments and features of embodiments in this application may be combined with each other without conflict.
See fig. 1 to 5.
The invention relates to a high-frequency metal hard sealing ball valve, which comprises a valve body 1, a valve ball 2 arranged in the valve body 1, a valve cover 4 connected to the top of the valve body 1, a valve rod 3 penetrating through the valve cover 4 and connected with the valve ball 2, and two valve body caps 5 respectively connected to the inlet end and the outlet end of the valve body 1, wherein the inlet end and the outlet end of the valve body 1 are respectively provided with a valve seat assembly, the valve seat assembly comprises a valve seat bracket 6 and a valve seat 7 sleeved in the valve seat bracket 6, the valve seat 7 and the valve ball 2 form contact sealing, a first sealing ring 18 for sealing the valve seat bracket 6 and the valve body 1 is embedded on the peripheral wall of the valve seat bracket 6, and a second sealing ring 19 for sealing the valve seat bracket 6 and the valve seat 7 is embedded on the peripheral wall of the valve seat bracket 6;
be equipped with round bead 16 on the periphery wall of disk seat 7, offer the round on the interior periphery wall of disk seat bracket 6 be used for stepping down bead 16's breach 17, bead 16 with install belleville spring 8 between the valve body cap 5, disk seat 7 stretches into in the valve body cap 5, disk seat 7 stretches into inlay on the periphery wall in the valve body cap 5 be used for sealing disk seat 7 with the third sealing washer 20 of valve body cap 5.
According to the design of the invention, the belleville spring can provide inward elasticity, the valve seat can be pressed on the valve ball under the action of the elasticity of the belleville spring, so that not only is the sealing effect better, but also the pretightening force provided by the belleville spring for the valve seat is stable when the valve ball rotates, and the strain caused by the sudden increase of the surface pressure of the sealing surface due to coaxiality error can be reduced.
In an embodiment, an upper flexible shaft 10 is installed between the valve rod 3 and the valve cover 4, and a fourth sealing ring 21 for sealing the valve cover 4 and the valve rod 3 is embedded below the upper flexible shaft 10 on the inner peripheral wall of the valve cover 4. By the design, the upper flexible shaft bearing plays roles of axial positioning and thrust, the fourth sealing ring can ensure that particles cannot enter the guiding part of the upper flexible shaft bearing, the precise matching position cannot be influenced, valve faults caused by bearing failure are avoided, and the upper flexible shaft bearing can be prevented from being invaded by a medium to cause failure.
The invention has the ingenious design that a plurality of sealing rings are arranged in an effective space on the premise of ensuring pressure balance and convenient installation so as to protect the working environment of the bearing and the belleville spring.
In one embodiment, a filling tetrafluoro pad 9 is installed in a space enclosed by the valve seat bracket 6, the valve body 1, the valve rod 3 and the valve ball 2. By the design, the space in the valve ball and the valve cavity is fully filled by filling the tetrafluoro pad, so that the possibility of failure caused by retention of catalyst particles in the valve cavity is reduced. The material for filling the tetrafluoro pad can be PTFE, polytetrafluoroethylene and other tetrafluoro materials.
In an embodiment, a support column 12 is arranged at the bottom of the valve ball 2, a flexible shaft bearing 13 is installed at the bottom of the valve body 1, a lower flexible shaft 11 is installed between the support column 12 and the flexible shaft bearing 13, a fifth sealing ring 22 for sealing the flexible shaft bearing 13 and the support column 12 is embedded on the inner peripheral wall of the flexible shaft bearing 13 above the lower flexible shaft bearing 11, and a sixth sealing ring 23 for sealing the flexible shaft bearing 13 and the valve body 1 is embedded on the outer peripheral wall of the flexible shaft bearing 13. By means of the design, the support column is matched with the valve rod, coaxiality of the rotation center of the valve rod and the rotation center of the ball body can be guaranteed, the lower flexible shaft bearing plays a role in axial positioning and thrust, and the sixth sealing ring can ensure that particles cannot enter the guiding part of the lower flexible shaft bearing.
In an embodiment, the wear-resistant sleeve 14 is sleeved in the valve body cap 5, a snap ring 15 for limiting the wear-resistant sleeve 14 is clamped on the inner peripheral wall of the valve body cap 5 and positioned on the inner side of the wear-resistant sleeve 14, and a seventh sealing ring 24 for sealing the valve body cap 5 and the wear-resistant sleeve 14 is further embedded on the inner peripheral wall of the valve body cap 5. The traditional mode of manufacturing the valve body cap by adopting the integral material is too high in cost, the process for strengthening the inner runner by adopting the spraying mode is complex and low in reliability, and the wear-resistant sleeve is arranged and is fixed and limited by the clamping ring, so that the cost can be saved, and the wear resistance and the flushing resistance of the runner can be well improved. The wear sleeve may be made of 440C or a monolithic tungsten carbide material.
In one embodiment, the valve stem 3 and the valve ball 2 are integrally formed. The design can avoid the defects of weakening strength and poor coaxiality of the joint of the valve rod and the ball body, solve the problem of design of the fixed ball of the small-caliber ball valve, and ensure coaxiality of the rotation center of the valve rod and the rotation center of the ball body by matching with the support column, so that abrasion caused by gaps or different axes between matched parts is reduced.
In one placeIn the embodiment, the materials of the upper flexible bearing 10 and the lower flexible bearing 11 are composed of gauze and a tetrafluoro-series coating sprayed on the gauze. The material has the characteristics of high surface pressure, high wear resistance, low friction and the like, can ensure that the switch achieves the effect of high frequency, can ensure that the valve has reliable long-time guiding function under the condition of high-frequency switch, and ensures that the valve is guided for a long time and effective under the frequent switch condition. The tetrafluoro-based coating can be made of PTFE, polytetrafluoroethylene and other tetrafluoro-based materials. In practice, NORGLIDE available from Santa-Gobi corporation may also be used directly Ⓡ MP maintenance-free self-lubricating lining material.
In one embodiment, the surface of the valve ball 2 (including the spherical surface and the inner runner surface) is sprayed with cemented carbide, and the valve seat 7 is made of stellite. The ball body and the ball body runner are sprayed with hard alloy, the valve seat adopts integral stellite, the flushing resistance is strong, the high-frequency working condition and the flushing of powder medium on the valve seat of the integral stellite, the inner runner sprayed with the ball body of the sealing surface and the whole runner combination formed by the wear-resistant sleeve are met, and the integral stellite has good flushing resistance and wear resistance. The hard alloy is preferably nickel-based material with better hardness and wear resistance, and can be Colmonoy No.6 or 16C material.
In one embodiment, a packing 25 is installed between the valve stem 3 and the valve cap 4.
In one embodiment, the valve stem 3 is roll extruded with HCR at the contact with the packing 25, upper flexible bearing 10 and lower flexible bearing 11. By the design, friction force can be reduced, abrasion resistance can be improved, and the valve rod which is not subjected to HCR treatment after rolling extrusion, and the filler and the bearing are easy to corrode and abrade.
In addition, the metal sealing surface scraper can be designed, and the catalyst cannot be adhered to the surface of the sphere.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (6)
1. The high-frequency metal hard sealing ball valve comprises a valve body, a valve ball arranged in the valve body, a valve cover connected to the top of the valve body, a valve rod penetrating through the valve cover and connected with the valve ball, and two valve body caps respectively connected to an inlet end and an outlet end of the valve body, and is characterized in that the inlet end and the outlet end of the valve body are respectively provided with a valve seat assembly, the valve seat assembly comprises a valve seat bracket and a valve seat sleeved in the valve seat bracket, the valve seat and the valve ball form contact sealing, a first sealing ring for sealing the valve seat bracket and the valve body is embedded on the peripheral wall of the valve seat bracket, and a second sealing ring for sealing the valve seat bracket and the valve seat is embedded on the inner peripheral wall of the valve seat bracket;
a circle of convex edges are arranged on the outer peripheral wall of the valve seat, a circle of notch for giving way to the convex edges is formed on the inner peripheral wall of the valve seat bracket, a butterfly spring is arranged between the convex edges and the valve body cap, the valve seat stretches into the valve body cap, and a third sealing ring for sealing the valve seat and the valve body cap is embedded on the outer peripheral wall of the valve seat stretching into the valve body cap;
an upper flexible bearing is arranged between the valve rod and the valve cover, and a fourth sealing ring for sealing the valve cover and the valve rod is embedded below the upper flexible bearing on the inner peripheral wall of the valve cover;
the bottom of the valve ball is provided with a support column, the bottom of the valve body is provided with a flexible shaft bearing seat, the support column penetrates through the flexible shaft bearing seat and is provided with a lower flexible bearing between the support column and the flexible shaft bearing seat, a fifth sealing ring for sealing the flexible shaft bearing seat and the support column is embedded above the lower flexible bearing on the inner peripheral wall of the flexible shaft bearing seat, and a sixth sealing ring for sealing the flexible shaft bearing seat and the valve body is embedded on the outer peripheral wall of the flexible shaft bearing seat; the upper soft bearing and the lower soft bearing are made of gauze and a tetrafluoro coating sprayed on the gauze.
2. The high frequency metal hard seal ball valve of claim 1, wherein a filled tetrafluoro-pad is installed in a space enclosed by said valve seat carrier, said valve body, said valve stem and said valve ball.
3. The high-frequency metal hard sealing ball valve according to claim 1 or 2, wherein the valve body cap inner sleeve is provided with a wear-resistant sleeve, a clamping ring for limiting the wear-resistant sleeve is clamped on the inner peripheral wall of the valve body cap and positioned on the inner side of the wear-resistant sleeve, and a seventh sealing ring for sealing the valve body cap and the wear-resistant sleeve is also embedded on the inner peripheral wall of the valve body cap.
4. The high frequency metal hard seal ball valve of claim 1 or 2, wherein the valve stem and the valve ball are of an integrally formed construction.
5. The high frequency metal hard seal ball valve of claim 1 or 2, wherein the surface of the ball is coated with cemented carbide.
6. A high frequency metal hard seal ball valve as claimed in claim 1 or 2 wherein said valve seat is made of stellite.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310014971.0A CN115899310B (en) | 2023-01-06 | 2023-01-06 | High-frequency metal hard sealing ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310014971.0A CN115899310B (en) | 2023-01-06 | 2023-01-06 | High-frequency metal hard sealing ball valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115899310A CN115899310A (en) | 2023-04-04 |
| CN115899310B true CN115899310B (en) | 2023-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202310014971.0A Active CN115899310B (en) | 2023-01-06 | 2023-01-06 | High-frequency metal hard sealing ball valve |
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Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201221610Y (en) * | 2008-07-04 | 2009-04-15 | 李汝忠 | High abrasion-proof slag discharging valve |
| CN101581375A (en) * | 2009-06-26 | 2009-11-18 | 昆山维萨阀门有限公司 | Metal hard seal ball valve |
| JP6014476B2 (en) * | 2012-12-04 | 2016-10-25 | 株式会社キッツエスシーティー | Butterfly pressure control valve |
| CN203500566U (en) * | 2013-09-10 | 2014-03-26 | 无锡卓尔阀业有限公司 | Metal hard-sealing three-way automatic control ball valve |
| CN107191616B (en) * | 2017-06-16 | 2019-12-13 | 无锡斯考尔自动控制设备有限公司 | Ultrahigh pressure metal sealing ball valve |
| CN108895175A (en) * | 2018-08-30 | 2018-11-27 | 昆山维萨阀门有限公司 | A kind of metal hard-sealing ball valve |
| CN109695734A (en) * | 2019-02-27 | 2019-04-30 | 温州捷凯智能设备科技有限公司 | A kind of efficient hard seal ball valve |
| CN212718121U (en) * | 2020-07-09 | 2021-03-16 | 赛洛克流体设备成都有限公司 | High-temperature high-pressure hard sealing ball valve |
| CN113775782B (en) * | 2021-08-26 | 2022-07-22 | 无锡斯考尔自动控制设备有限公司 | Novel high-temperature high-pressure hard-sealing metal ball valve |
| CN113775785B (en) * | 2021-09-02 | 2022-07-15 | 无锡斯考尔自动控制设备有限公司 | Metal ball valve for powder and granular media |
| CN216975853U (en) * | 2021-12-29 | 2022-07-15 | 无锡斯考尔自动控制设备有限公司 | Soft sealing ball valve |
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2023
- 2023-01-06 CN CN202310014971.0A patent/CN115899310B/en active Active
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