CN203258094U - Sphere surface high-temperature and abrasion-resisting alloy coating used for hard seal ball valve - Google Patents
Sphere surface high-temperature and abrasion-resisting alloy coating used for hard seal ball valve Download PDFInfo
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- CN203258094U CN203258094U CN 201320148957 CN201320148957U CN203258094U CN 203258094 U CN203258094 U CN 203258094U CN 201320148957 CN201320148957 CN 201320148957 CN 201320148957 U CN201320148957 U CN 201320148957U CN 203258094 U CN203258094 U CN 203258094U
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- abrasion
- temperature
- valve base
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Abstract
Provided is a sphere surface high-temperature and abrasion-resisting alloy coating used for a hard seal ball valve. The sphere surface high-temperature and abrasion-resisting alloy coating used for the hard seal ball valve comprises a valve body, a valve cover and a valve rod, wherein an upper valve seat and a lower valve seat are arranged in a cavity formed by the valve body and the valve cover. A high-temperature and abrasion-resisting alloy coating body is arranged on the surface of a sphere. The circular degree of the surface of the sphere, the contact surface of the upper valve seat and the contact surface of the lower valve seat is less than or equal to 0.05mm, and the smoothness is less than or equal to Ra0.04 micrometer. The valve seat and sphere abrasion-resisting hardening technology is adopted, namely hard alloys are overlaid on the surfaces where the upper valve seat makes contact with the sphere and the lower valve seat makes contact with the sphere, meanwhile, the high-temperature and abrasion-resisting alloy coating body is sprayed on the surface of the sphere, and the rigidity and abrasion-resisting performance of the sphere and the valve seats is strengthened. The problem that under the conditions of high temperature and pressure and washing of solid granular media, the valve seats and the sphere are abraded easy is solved. The flexible graphite sealing technology is adopted, and a flexible graphite sealing ring is arranged between the lower valve seat and the valve body. Due to the fact that the flexible graphite sealing ring can be compressed and deform, the sealing can be achieved at the high temperature.
Description
Technical field
The utility model relates to a kind of spherome surface high temperature wear resistant alloy coating, particularly a kind of spherome surface coating of high-temperature wearable metal hard-sealing ball valve.
Background technique
High-temperature abrasion-resistant ball valve is applicable to High Temperature High Pressure and contains the medium operating mode of a large amount of solid grits, and it requires the valve opening and closing time of use short, and flow resistance coefficient is little, and flow coefficient is large, and is high temperature resistant, wear-resistant, long service life.And in known in the market high-temperature abrasion-resistant ball valve technology, its sealing material mostly is greatly rubber, teflon etc., under high-temperature condition, thermal expansion occurs and causes spheroid and valve base chamber to be expanded extremely in spheroid and upper valve base easily, and can not open, between lower valve base and the valve body then packing less situation can occur.And spheroid, upper valve base, lower valve base itself are not wear-resisting, and when work, the phase mutual friction causes producing the gap between spheroid and upper valve base, the lower valve base between spheroid and upper valve base, the lower valve base, thereby dielectric leakage occurs poor sealing.Therefore, not only wear-resisting but also coating sealing of spherome surface is the key that addresses the above problem.
Summary of the invention
The utility model provides a kind of spherome surface high temperature wear resistant alloy coating for hard seal ball valve, and purpose is to solve the prior art problem, and a kind of good seal performance, wear-resisting seal ball-valve spherome surface coating are provided.
The utility model technological scheme that adopts of dealing with problems is:
A kind of spherome surface high temperature wear resistant alloy coating for hard seal ball valve. include valve body, valve gap, valve rod, in the cavity of valve body and valve gap formation, be provided with upper valve base and lower valve base.Described spherome surface is provided with the high temperature wear resistant alloy coating.Pile-up welding hard alloy layer respectively on the contacted surface of contact of upper valve base and lower valve base and spheroid, the circularity≤0.05mm of spherome surface, upper valve base surface of contact and lower valve base surface of contact wherein, smoothness≤Ra0.4um.
Thickness 〉=the 0.2mm of described high temperature wear resistant alloy layer, hardness HRC 〉=76.
Described hard alloy layer hardness HRC in upper valve base and lower valve base built-up welding 〉=40.
The beneficial effects of the utility model: adopt valve seat and the wear-resisting hardening technique of spheroid, namely upper Yan seat, lower valve base respectively with the contacted surface of contact of spheroid on pile-up welding hard alloy, simultaneously at spherome surface spraying high temperature wear resistant alloy layer, to strengthen hardness and the wear-resisting property of spheroid and valve seat.Solved in High Temperature High Pressure and solid particle medium and washed away down valve seat and ball seal face problem easy to wear.Adopt the flexible graphite sealing technology, will be provided with flexible graphite sealing ring between lower valve base and the valve body.Because the compressible distortion of flexible stone mill seal ring still can seal under the condition of high temperature.
Description of drawings
Fig. 1 is structural representation of the present utility model;
Among the figure: 1. valve body, 2. valve gap, 3. valve rod, 4. upper valve base, 5. lower valve base, 6. spheroid, 7. spring seat, 8. spring, 9. the Expanded graphite circle,
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is described in further details.
The high-temperature wearable metal hard-sealing ball valve includes valve body 1, valve gap 2, valve rod 3, is provided with upper valve base 4 and lower valve base 5 in the cavity of valve body 3 and valve gap 2 formations, and spheroid 6 places between upper valve base 4 and the lower valve base 5, and valve rod 3 is connected with spheroid 6.The outside end face of upper valve base 4 has been installed with spring seat 7, and spring seat 7 is provided with spring 8, because the spring of available technology adopting is under the worst hot case heat expands state, spheroid 6 is expanded dead with upper valve base 4, can't open and close problem, for addressing this problem, the spring 8 in this patent adopts butterfly spring.The outside end face of lower valve base 5 is provided with the Expanded graphite circle 9 as valve seat insert, and Expanded graphite circle 9 is folded between valve body 1 and the lower valve base 5.
Spheroid 6 and upper valve base 4, lower valve base 5 all adopt the preparation of F304 material in this patent, and high temperature resistant is 650 ℃.In order to improve the wear resistance of spheroid 6, upper valve base 4, lower valve base 5, give up the gold layer at spheroid 6 surface spraying high-temperature wearables, simultaneously at upper valve base 4 and lower valve base 5 and spheroid 6 contacted surface of contact difference pile-up welding hard alloy layers.Simultaneously in order to guarantee the sealing between spheroid and the valve seat, make its sealing can reach overproof requirement, circularity≤the 0.05mm of spherome surface, upper valve base surface of contact, lower valve base surface of contact wherein, smoothness≤Ra0.4um, its friction factor are 0.03～0.05.Be circularity and the smoothness that spheroid and upper valve base, lower valve base surface of contact in the realization this patent require, adopt spheroid, upper valve base, lower valve base and lapping apparatus in the technology of space different azimuth spin finishing.
Further, in order to improve the rub proofness that spheroid is valve seat, be sprayed at the thickness 〉=0.2mm of high temperature of outer surface of high wear-resistant alloy layer, hardness HRC 〉=76, and through cure process are simultaneously in its hardness of hard alloy layer HRC of upper valve base and lower valve base built-up welding 〉=40, make spheroid and valve seat have high hardness and extraordinary wear-resisting property, prolong working life, is proven, and the life-span of spheroid and valve seat can increase more than the twice in this patent.
This patent high-temperature wearable metal hard-sealing ball valve has the following advantages:
1, adopts the flexible graphite sealing technology, will be provided with the seal of Expanded graphite kiln between lower valve base and the valve body.Because the compressible distortion of flexible stone mill seal ring still can seal under the condition of high temperature.
2, adopt valve seat and the wear-resisting hardening technique of spheroid, namely upper valve base, lower valve base respectively with the contacted surface of contact of spheroid on pile-up welding hard alloy, simultaneously at spherome surface spraying high temperature wear resistant alloy layer, to strengthen hardness and the wear-resisting property of spheroid and valve seat.Solved in High Temperature High Pressure and solid particle medium and washed away down valve seat and ball seal face problem easy to wear.
Claims (1)
1. a spherome surface high temperature wear resistant alloy coating that is used for hard seal ball valve includes valve body, valve gap, valve rod, is provided with upper valve base and lower valve base in the cavity of valve body and valve gap formation; Described spherome surface is provided with the high temperature wear resistant alloy coating; Pile-up welding hard alloy layer respectively on the contacted surface of contact of upper valve base and lower valve base and spheroid, the circularity≤0.05mm of spherome surface, upper valve base surface of contact and lower valve base surface of contact wherein, smoothness≤Ra0.4um; Thickness 〉=the 0.2mm of described high temperature wear resistant alloy layer, hardness HRC 〉=76; Described hard alloy layer hardness HRC in upper valve base and lower valve base built-up welding 〉=40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320148957 CN203258094U (en) | 2013-03-29 | 2013-03-29 | Sphere surface high-temperature and abrasion-resisting alloy coating used for hard seal ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320148957 CN203258094U (en) | 2013-03-29 | 2013-03-29 | Sphere surface high-temperature and abrasion-resisting alloy coating used for hard seal ball valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203258094U true CN203258094U (en) | 2013-10-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320148957 Expired - Fee Related CN203258094U (en) | 2013-03-29 | 2013-03-29 | Sphere surface high-temperature and abrasion-resisting alloy coating used for hard seal ball valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203258094U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455538A (en) * | 2014-12-08 | 2015-03-25 | 章华 | Ball valve ball with high-wearable sealing surface and production method thereof |
| CN114152430A (en) * | 2021-12-24 | 2022-03-08 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method for surfacing layer of sealing surface of valve seat |
-
2013
- 2013-03-29 CN CN 201320148957 patent/CN203258094U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104455538A (en) * | 2014-12-08 | 2015-03-25 | 章华 | Ball valve ball with high-wearable sealing surface and production method thereof |
| CN114152430A (en) * | 2021-12-24 | 2022-03-08 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method for surfacing layer of sealing surface of valve seat |
| CN114152430B (en) * | 2021-12-24 | 2024-05-03 | 东方电气集团东方汽轮机有限公司 | Comprehensive performance evaluation method of surfacing layer of sealing surface of valve seat |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131030 Termination date: 20160329 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |