CN102501138A - Machining process for interchangeable wedge-shaped gates and valve seat - Google Patents
Machining process for interchangeable wedge-shaped gates and valve seat Download PDFInfo
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- CN102501138A CN102501138A CN2011103461631A CN201110346163A CN102501138A CN 102501138 A CN102501138 A CN 102501138A CN 2011103461631 A CN2011103461631 A CN 2011103461631A CN 201110346163 A CN201110346163 A CN 201110346163A CN 102501138 A CN102501138 A CN 102501138A
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- flashboard
- valve
- valve seat
- sealing surface
- welding
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- 238000003754 machining Methods 0.000 title abstract description 15
- 238000007789 sealing Methods 0.000 claims abstract description 80
- 238000003466 welding Methods 0.000 claims abstract description 31
- 238000000034 method Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000005516 engineering process Methods 0.000 claims description 24
- 238000012856 packing Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 7
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 5
- 230000008676 import Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 206010061619 Deformity Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000001815 facial effect Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
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Abstract
The invention relates to a machining process for interchangeable wedge-shaped gates and a valve seat, comprising a machining process for gate sealing surfaces and a machining process for valve seat sealing surfaces, wherein the gate sealing surfaces are machined by a special numerically-controlled machine, and the machining process for the valve seat sealing surfaces comprises the following steps of: overlaying for the valve seat sealing surfaces, finish-turning for the valve seat sealing surfaces, grinding for the valve seat sealing surfaces and welding for the valve seat and a valve body. The machining process for interchangeable wedge-shaped gates and a valve seat is mainly characterized in that the welding process for the valve body and a valve body comprises the following working procedures: installing the valve seats in the valve body; installing a gate module between the two valve seats; fixing the valve seats at the both sides with the gate module via high-temperature-resistant washers, bolts and nuts; welding the valve seats at the both sides with the valve body; and detaching the bolts, the nuts, the high-temperature-resistant washers and the gate module. The machining process for interchangeable wedge-shaped gates and a valve seat prevents the deformation of the valve seats due to welding heat, ensures the uniform wedge angle of each valve seat sealing surface, ensures the uniform dimensions of the gate module and actual gate components, realizes the cooperative use of any gate and any valve body, and has the advantages of being high in machining accuracy, good in interchangeability etc. The machining process for interchangeable wedge-shaped gates and a valve seat can be used for machining process for the wedge-shaped gates and valve seat of gate valve.
Description
Technical field
The present invention relates to valve field, specifically about the secondary processing method of Gate-valve sealing.The present invention is applicable to the processing of gate valve flashboard sealing surface and sealing surface of seat.
Background technology
Gate valve has dull and stereotyped hermetically-sealed construction, extruding/shrinking type hermetically-sealed construction and wedge-type hermetically-sealed construction according to the version of its sealing pair.Wedge-type hermetically-sealed construction gate valve is to adopt the V-arrangement sealing surface of seat of V-arrangement wedge-type flashboard and the valve body import and export passway formation sealing pair that cooperatively interacts.In wedge-type hermetically-sealed construction gate valve, the direction of motion of wedge-type flashboard is vertical with flow direction, and sealing surface is easy to wear, belongs to consumable accessory, so the interchangeable of wedge-type flashboard makes things convenient for the maintenance of gate valve or change flashboard.Realize that the interchangeable of wedge-type flashboard will be guaranteed by the processing technology of wedge-type flashboard sealing surface and sealing surface of seat; The wedge-type flashboard can adopt numerical control special plane processing technology to guarantee its uniformity; And the processing technology of sealing surface of seat mainly contains two kinds of methods at present; A kind of is directly in valve body, to process, and its technical process is: casting → both sides sealing surface build-up welding → two side flanges processing → middle flange processing → with the inlet side Flange Plane be on the datum level gradient frock car to wash out oral-lateral sealing surface → with the outlet side Flange Plane be that gradient frock car is washed inlet side sealing surface → grind respectively two side seal faces → boring → cleaning on the datum level.The major defect of this process is: the car of valve seat both sides sealing face or mill are employed on the same gradient frock and accomplish through twice clamping valve body operation; Promptly behind a side seal face car or the mill; Valve body is turned 180 ° and is installed on the gradient frock car or mill opposite side sealing surface again, and there is error in each fitting operation, makes the mismachining tolerance of sealing surface of seat of each valve body inconsistent; And sealing surface of seat is directly processed in valve body; The machining accuracy of restriction sealing surface of seat makes each sealing surface of seat machining accuracy uneven, and uniformity is poor.Another kind is to adopt valve seat is welded on the valve body after the processing separately, and its processing technology is: valve base sealing surface build-up welding → sealing surface of seat finish turning → sealing surface of seat grinding → valve seat and valve body welding.Car, the mill precision of sealing surface of seat have been improved; But the major defect of this technology is: valve seat and valve body welding procedure are to adopt directly valve seat is welded in the import and export of body cavity passage; Heat during welding is prone to make the valve base sealing facial disfigurement; Influence sealing surface of seat angle of wedge precision, the sealing surface of seat angle of wedge uniformity of each valve body is poor, and the interchangeability that cooperates with flashboard is poor.
Summary of the invention
The objective of the invention is the shortcoming to the prior art existence, provide a kind of sealing surface of seat machining accuracy high, the sealing surface of seat machining accuracy of each valve body and angle of wedge high conformity, flashboard can exchange the interchangeable wedge shape flashboard of use and the processing technology of valve seat.
Technical scheme of the present invention comprises the processing technology of flashboard sealing surface and sealing surface of seat; The flashboard sealing surface adopts the processing of numerical control special plane; The processing technology of sealing surface of seat is: the welding of valve base sealing surface build-up welding → sealing surface of seat finish turning → sealing surface of seat grinding → valve seat and valve body mainly is that valve seat and valve body welding procedure adopt following operation composition: valve seat pack into the valve body → flashboard module of between two valve seats, packing into → by high temperature resistant packing ring and bolt, nut both sides valve seat and flashboard module are fixed → with both sides valve seat and valve body welding → demounting bolt, nut, high temperature resistant packing ring and flashboard module.
In above technical scheme, flashboard sealing surface processing technology is: casting → both sides sealing surface build-up welding → go up the numerically controlled lathe programmed settings to process side seal inclined-plane → 180 ° of processing of rotary tooling anchor clamps rotating disk opposite side sealing inclined-plane.
Preferably, the processing technology of flashboard sealing surface is: install in casting → both sides sealing surface build-up welding → brake plate connecting hole and circumference → flashboard connecting hole connecting rod → through connecting rod flashboard is installed on the horizontal frock of the special plane with fixed elevation unit head → flashboard both sides sealing face finish turning → flashboard both sides sealing face grinds.
Advantage of the present invention is to weld after valve seat and valve body welding procedure adopt the flashboard module that the both sides valve seat is fixed; Prevent that welding heat from making the valve seat distortion; Guarantee that each sealing surface of seat has the consistent angle of wedge; And the consistent size of flashboard module and actual flashboard part, having realized that arbitrary flashboard can be used with arbitrary valve body, interchangeability is good.
Description of drawings
Fig. 1 is the frock sketch map of valve seat welding procedure of the present invention.
The specific embodiment
The processing technology of interchangeable wedge shape flashboard of the present invention and valve seat; The processing technology that comprises flashboard sealing surface and sealing surface of seat; The flashboard sealing surface adopts the processing of numerical control special plane, and the processing technology of sealing surface of seat is: valve base sealing surface build-up welding → sealing surface of seat finish turning → sealing surface of seat grinding → valve seat and valve body welding.Valve seat 2 and valve body 1 welding procedure adopt following operation to form: valve seat 2 pack into the valve body 1 → flashboard module 6 of between two valve seats 2, packing into → by high temperature resistant packing ring 3 and bolt 4, nut 5 with both sides valve seat 2 and flashboard module 6 fixing → with both sides valve seat 2 and valve body 1 welding → demounting bolt 4, nut 5, high temperature resistant packing ring 3 and flashboard module 6; As shown in Figure 1; Said valve seat 2 valve body 1 of packing into; Be that two valve seats 2 are respectively charged in the valve support chamber of valve body 1 bore passages import and export; Valve seat 2 in valve support chamber with valve body 1 matched in clearance so that implement welding.The consistent size of flashboard module 6 and wedge action valve can be used wedge action valve with each valve body 1.
Flashboard sealing surface processing technology is: casting → both sides sealing surface build-up welding → go up the numerically controlled lathe programmed settings to process side seal inclined-plane → 180 ° of processing of rotary tooling anchor clamps rotating disk opposite side sealing inclined-plane.The car of flashboard sealing surface, mill processing technology are carried out under the control program of identical inclined-plane frock and corresponding numerically controlled lathe and correspondence, guarantee that each flashboard has consistent size, realize that flashboard is interchangeable.The draft angle of inclined-plane frock has 3 ° and 5 ° of two kinds of angles, and to the gate valve of bore more than or equal to one meter, the draft angle of its inclined-plane frock is 3 °, and to the gate valve of bore less than one meter, the draft angle of its inclined-plane frock is 5 °.
The flashboard sealing surface also can adopt following machining process: install in casting → both sides sealing surface build-up welding → brake plate connecting hole and circumference → flashboard connecting hole connecting rod → through connecting rod flashboard is installed on the horizontal frock of the special plane with fixed elevation unit head → flashboard both sides sealing face finish turning → flashboard both sides sealing face grinds.
Claims (3)
1. the processing technology of interchangeable wedge shape flashboard and valve seat; The processing technology that comprises flashboard sealing surface and sealing surface of seat; The flashboard sealing surface adopts the processing of numerical control special plane; The processing technology of sealing surface of seat is: the welding of valve base sealing surface build-up welding → sealing surface of seat finish turning → sealing surface of seat grinding → valve seat and valve body is characterized in that valve seat (2) and valve body (1) welding procedure adopt following operation to form: valve seat (2) pack into valve body (1) → flashboard module of between two valve seats (2), packing into (6) → by high temperature resistant packing ring (3) and bolt (4), nut (5) both sides valve seat (2) and flashboard module (6) are fixed → with both sides valve seat (2) and valve body (1) welding → demounting bolt (4), nut (5), high temperature resistant packing ring (3) and flashboard module (6).
2. the processing technology of interchangeable wedge shape flashboard according to claim 1 and valve seat is characterized in that flashboard sealing surface processing technology is: casting → both sides sealing surface build-up welding → go up the numerically controlled lathe programmed settings to process side seal inclined-plane → 180 ° of processing of rotary tooling anchor clamps rotating disk opposite side sealing inclined-plane.
3. the processing technology of interchangeable wedge shape flashboard according to claim 1 and valve seat is characterized in that the processing technology of flashboard sealing surface is: install in casting → both sides sealing surface build-up welding → brake plate connecting hole and circumference → flashboard connecting hole connecting rod → through connecting rod flashboard is installed on the horizontal frock of the special plane with fixed elevation unit head → flashboard both sides sealing face finish turning → flashboard both sides sealing face grinds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110346163 CN102501138B (en) | 2011-11-01 | 2011-11-01 | Machining process for interchangeable wedge-shaped gates and valve seat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110346163 CN102501138B (en) | 2011-11-01 | 2011-11-01 | Machining process for interchangeable wedge-shaped gates and valve seat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102501138A true CN102501138A (en) | 2012-06-20 |
| CN102501138B CN102501138B (en) | 2013-09-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110346163 Expired - Fee Related CN102501138B (en) | 2011-11-01 | 2011-11-01 | Machining process for interchangeable wedge-shaped gates and valve seat |
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| Country | Link |
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| CN (1) | CN102501138B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748491A (en) * | 2012-07-22 | 2012-10-24 | 江苏金晟元特种阀门有限公司 | Intelligent monitoring maintenance-free electric gate valve |
| CN105598644A (en) * | 2016-01-21 | 2016-05-25 | 永嘉县恒正阀门有限公司 | Wedge gate valve sealing face machining technology and automatic surfacing equipment thereof |
| CN105773071A (en) * | 2015-11-27 | 2016-07-20 | 南通市电站阀门有限公司 | Assembly method of valve seat of small-diameter gate valve |
| CN106239003A (en) * | 2016-08-30 | 2016-12-21 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN109128922A (en) * | 2018-11-07 | 2019-01-04 | 四川优机实业股份有限公司 | Technological equipment for sealing surface of the discharge gate processing |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB925949A (en) * | 1961-01-02 | 1963-05-15 | Crane Co | Improvements in fluid control gate valves |
| CN2136915Y (en) * | 1992-08-19 | 1993-06-23 | 肥城矿务局 | Welded gate valve |
| US6195890B1 (en) * | 1998-03-02 | 2001-03-06 | T & R Solutions, Inc. | Method of making a valve stem |
| JP2001108116A (en) * | 1999-10-04 | 2001-04-20 | Hirata Valve Industry Co Ltd | Forged gate valve |
| CN102151871A (en) * | 2010-02-11 | 2011-08-17 | 上海茂德企业集团有限公司 | Method for processing interchangeable valve body and gate of gate valve and special-purpose machine tool |
-
2011
- 2011-11-01 CN CN 201110346163 patent/CN102501138B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB925949A (en) * | 1961-01-02 | 1963-05-15 | Crane Co | Improvements in fluid control gate valves |
| CN2136915Y (en) * | 1992-08-19 | 1993-06-23 | 肥城矿务局 | Welded gate valve |
| US6195890B1 (en) * | 1998-03-02 | 2001-03-06 | T & R Solutions, Inc. | Method of making a valve stem |
| JP2001108116A (en) * | 1999-10-04 | 2001-04-20 | Hirata Valve Industry Co Ltd | Forged gate valve |
| CN102151871A (en) * | 2010-02-11 | 2011-08-17 | 上海茂德企业集团有限公司 | Method for processing interchangeable valve body and gate of gate valve and special-purpose machine tool |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102748491A (en) * | 2012-07-22 | 2012-10-24 | 江苏金晟元特种阀门有限公司 | Intelligent monitoring maintenance-free electric gate valve |
| CN105773071A (en) * | 2015-11-27 | 2016-07-20 | 南通市电站阀门有限公司 | Assembly method of valve seat of small-diameter gate valve |
| CN105598644A (en) * | 2016-01-21 | 2016-05-25 | 永嘉县恒正阀门有限公司 | Wedge gate valve sealing face machining technology and automatic surfacing equipment thereof |
| CN106239003A (en) * | 2016-08-30 | 2016-12-21 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN106239003B (en) * | 2016-08-30 | 2017-11-14 | 苏州纽威阀门股份有限公司 | A kind of valve block lap welding connects positioning tool |
| CN109128922A (en) * | 2018-11-07 | 2019-01-04 | 四川优机实业股份有限公司 | Technological equipment for sealing surface of the discharge gate processing |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102501138B (en) | 2013-09-25 |
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Granted publication date: 20130925 |