CN1095721C - Production method of valve seat of metallic packing butterfly valve - Google Patents
Production method of valve seat of metallic packing butterfly valve Download PDFInfo
- Publication number
- CN1095721C CN1095721C CN99113657A CN99113657A CN1095721C CN 1095721 C CN1095721 C CN 1095721C CN 99113657 A CN99113657 A CN 99113657A CN 99113657 A CN99113657 A CN 99113657A CN 1095721 C CN1095721 C CN 1095721C
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- China
- Prior art keywords
- valve seat
- valve
- butterfly valve
- butterfly
- metallic packing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The present invention discloses a new technology for manufacturing a valve seat of a butterfly valve, which is characterized in that the valve seat is formed in such a manner that a forging member is processed by a turning technology and a grinding technology after heat treatment. Therefore, the material stress of the valve seat is eliminated. Thus, the valve seat can not deform when the butterfly valve is used. The valve seat keeps the roundness of the valve seat and has good roughness of a sealing surface. The sealing performance and the high-temperature resistance of the butterfly valve are greatly increased. The thickness and the specification of the valve seat can be randomly processed along with different usage pressure and the increase of the caliber of the butterfly valve. Thus, a metal sealing butterfly valve of a large caliber can be manufactured.
Description
The present invention relates to a kind of manufacture method of valve, particularly about a kind of processing method of valve seat of metallic packing butterfly valve.
Butterfly valve is widely used in each industrial occasions because of its advantage such as simple in structure, easy to use, cheap, its structure mainly is made up of valve body, butterfly plate, valve seat, valve rod etc., and the fine or not key of its usability depends on the cooperating structure between butterfly plate sealing surface and the sealing surface of seat.At present, the valve seat of metallic sealing butterfly valve all be with iron plate through mould compression moulding, the valve seat of making moulding by this method because of iron plate without heat treatment, resiliently deformable takes place in the processing back under the material stress effect, circularity is relatively poor.Valve base surface after the moulding can't be reprocessed, and roughness is poor.In addition,, can not indiscriminately ad. as one wishes design the wall thickness of valve seat, just can't produce some big specification butterfly valves especially with the variation of valve specification and working pressure because the thickness of iron plate has specification standards.
The objective of the invention is to problem at the prior art existence, a kind of new process of making valve seat of metallic packing butterfly valve is provided, make indeformable after the butterfly valve seat moulding, circularity and roughness good, and can be with the different thickness that arbitrarily design and produce valve seat of valve specification and working pressure.
The scheme that realizes the object of the invention comprises following manufacturing process: mould is forged moulding → forge part heat treatment → go up three jaw chuck, clamp the blank cylindrical, rough turn plane and interior craft thread or interior step, and keep machining allowance → go up threaded mandrel or step compresses cylindrical turning and outer ring circular groove R
1And plane → last frock, annular circular arc R in the car
2→ internal annular circular arc R
2The surface smooth grinding.
The present invention's beneficial effect compared with prior art be the valve seat of butterfly valve by forging part heat treatment after car, mill machine shaping, make valve seat indeformable, circularity is good, the sealing surface roughness is good, improved the sealability of valve, and the relative dimensions that can arbitrarily process valve seat according to the specification and the working pressure of valve, realize the production of heavy caliber metallic sealing butterfly valve.
Fig. 1 is one of processing technology figure of butterfly valve seat of the present invention.
Fig. 2 be butterfly valve seat of the present invention processing technology figure two.
Now describe technological scheme of the present invention in conjunction with the accompanying drawings and embodiments in detail.The manufacture method of butterfly valve seat of the present invention is by forging part heat treatment after car, the machine shaping of grinder preface, specific embodiment is: forge part through heat treatment to eliminate stress, going up three jaw chuck then clamps, rough turn plane and interior craft thread or interior step, and reservation machining allowance, utilizing threaded mandrel on the craft thread or utilizing pressing plate to tighten up on interior step, car is forged part cylindrical and outer ring circular groove R
1And surface turning, as shown in Figure 1.By the frock that goes up shown in Figure 2, annular circular arc R in the car
2, internal then annular circular arc R
2Smooth grinding is carried out on the surface.In Fig. 2, the frock in the outer ring circular groove is that section is two semicircular ring of circle, can be that rectangular or two semicircular ring similar to the flute profile of outer ring circular groove are formed by section also.
Claims (1)
1, a kind of manufacture method of valve seat of metallic packing butterfly valve is characterized in that being realized by following manufacturing process:
A, die-forging forming;
B, forging heat treatment;
C, load onto three jaw chuck, clamp the blank cylindrical, rough turn plane and interior craft thread or interior step, and keep machining allowance;
D, in above-mentioned, utilize threaded mandrel on the craft thread or in above-mentioned, utilize pressing plate to carry out on the step fastening, cylindrical turning and outer ring circular groove (R
1) and the plane;
E, load onto frock, annular circular arc (R in the car
2);
F, internal annular circular arc (R
2) surperficial smooth grinding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113657A CN1095721C (en) | 1999-04-21 | 1999-04-21 | Production method of valve seat of metallic packing butterfly valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99113657A CN1095721C (en) | 1999-04-21 | 1999-04-21 | Production method of valve seat of metallic packing butterfly valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1237496A CN1237496A (en) | 1999-12-08 |
| CN1095721C true CN1095721C (en) | 2002-12-11 |
Family
ID=5276823
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN99113657A Expired - Fee Related CN1095721C (en) | 1999-04-21 | 1999-04-21 | Production method of valve seat of metallic packing butterfly valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1095721C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102248129B (en) * | 2011-06-17 | 2012-12-26 | 河南豫兴铸造有限公司 | Method for controlling roundness of valve body during casting of butterfly valve body |
| CN107269859A (en) * | 2016-04-07 | 2017-10-20 | 上海累富阀门科技有限公司 | Hard alloy compound sealing structure and its preparation technology |
| CN107202170B (en) * | 2017-07-07 | 2023-06-23 | 浙江天和阀门有限公司 | Processing method of valve clack assembly of spring type fluorine-lined safety valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958314A (en) * | 1973-05-25 | 1976-05-25 | Henry Pratt Company | Seal for butterfly valves |
| US4209884A (en) * | 1979-01-02 | 1980-07-01 | Acf Industries, Incorporated | Method of forming valve seats |
| US4223430A (en) * | 1978-12-01 | 1980-09-23 | Crane Co. | Method for making seat assembly for butterfly valves |
| US4317558A (en) * | 1978-12-01 | 1982-03-02 | Crane Co. | Seat assembly for butterfly valve |
-
1999
- 1999-04-21 CN CN99113657A patent/CN1095721C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3958314A (en) * | 1973-05-25 | 1976-05-25 | Henry Pratt Company | Seal for butterfly valves |
| US4223430A (en) * | 1978-12-01 | 1980-09-23 | Crane Co. | Method for making seat assembly for butterfly valves |
| US4317558A (en) * | 1978-12-01 | 1982-03-02 | Crane Co. | Seat assembly for butterfly valve |
| US4209884A (en) * | 1979-01-02 | 1980-07-01 | Acf Industries, Incorporated | Method of forming valve seats |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1237496A (en) | 1999-12-08 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| ASS | Succession or assignment of patent right |
Owner name: ZHEJIANG PROV ZHONGGONG BUTTERFLY VALVE FACTORY Free format text: FORMER OWNER: ZHONGGONG BUTTERFLY VALVE FACTORY, YONGJIA COUNTY |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20010707 Applicant after: Zhonggong Butterfly Valve Factory, Zhejiang Applicant before: Zhonggong Butterfly Valve Factory, Yongjia county |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |