CN103047441A - Valve rod for high-temperature high-pressure stop valve and machining method of valve rod - Google Patents
Valve rod for high-temperature high-pressure stop valve and machining method of valve rod Download PDFInfo
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- CN103047441A CN103047441A CN2012105675254A CN201210567525A CN103047441A CN 103047441 A CN103047441 A CN 103047441A CN 2012105675254 A CN2012105675254 A CN 2012105675254A CN 201210567525 A CN201210567525 A CN 201210567525A CN 103047441 A CN103047441 A CN 103047441A
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Abstract
The invention discloses a valve rod for a high-temperature high-pressure stop valve and a machining method of the valve rod. The valve rod comprises main valve rod, a valve ball cap fixedly disposed at one end of the main valve rod, and a valve ball disposed in the valve ball cap in a free rotation manner. One end of the valve ball protrudes out of the valve ball cap. A spherical center of the valve ball is located on an axis of the main valve rod. The machining method includes machining the valve ball cap, welding the main valve rod, machining the inner spherical face and the valve rod, and assembling the valve ball. By the valve rod which is simple in structure, airtightness, impact resistance, corrosion resistance and operation reliability of valves in high-temperature high-pressure environments are improved.
Description
Technical field
The present invention relates to a kind of valve rod structure and manufacturing process, be specifically related to a kind of small-bore high temperature and high pressure cut-off valve with valve rod and processing method.
Background technique
At present; high temperature and high pressure cut-off valve has been nuclear industry; thermoelectricity; oil; chemical industry; defeated pipeline; shipbuilding; the indispensable fluid control devices of the industry such as aerospace and offshore oil production; most process systems of above-mentioned industry all need to arrange special valve; some high-end valves particularly; such as heatproof more than 600 ℃; the high temperature and high pressure cut-off valve that withstand voltage 30Mpa is above; the general key position that all is in process system; if the quality of these valves does not pass a test; light then affect the Economy of unit operation; heavy then affect the realization of process system function, cause said system unit load down even shutdown.Therefore, the quality of high temperature and high pressure cut-off valve directly affects industry Operation safety and the Economy such as nuclear industry, thermoelectricity, oil, chemical industry.Yet, present domestic high temperature and high pressure cut-off valve market, except the low side valve reached the receptible level in international market, high-end valve still needed to rely on import owing to compare with the foreign-made merchant and still have larger gap in the research of precision processing technology and high temperature material.
In the prior art, the stem head of general stop valve is stopper, sealing surface is plane or the conical surface, and stem head and valve rod are fixed and welded together, but the fluid resistance that such structural design is met when folding is larger, and required power is larger during folding, and because the shape facility of stem head is so that the scope that stem head is suitable for is less, adjusting function is relatively poor, and need to change whole valve rod when stem head damages to some extent, has increased maintenance cost.
Therefore, the manufacturing process technology of high temperature and high pressure cut-off valve has become a bottleneck of the high-end valve products development of restriction China.Must make larger contribution to the industrial development of China if break through this bottleneck, and can improve the income of enterprise.
Summary of the invention
Goal of the invention of the present invention provides a kind of simple in structure, high temperature and high pressure cut-off valve valve rod that stable and permanent sealability can be provided, and the processing method of this high temperature and high pressure cut-off valve usefulness valve rod.
To achieve the above object of the invention, the technical solution used in the present invention is:
A kind of high temperature and high pressure cut-off valve valve rod, it comprises the valve rod mobile jib, is fixedly installed on the valve ball cap of described valve rod mobile jib one end, freely rotates the valve ball that is arranged in the described valve ball cap, described valve ball one end protrudes outside described valve ball cap, and the described valve ball centre of sphere is positioned on the described valve rod mobile jib axis.
Preferred technological scheme, described valve ball cap side is provided with through hole.
Preferred technological scheme, the material of described valve ball is the Stellite alloy, the Stellite alloy is a kind of ability all kinds abrasion and corrosion and good high-temperature oxidation resistance, can effectively work and have long working life in the working environment of High Temperature High Pressure.
Described a kind of high temperature and high pressure cut-off valve comprises the following steps: with the processing method of valve rod
(1) roughing valve ball cap and valve rod mobile jib: get materials in the tube and carry out solution treatment, at described materials in the tube the first end face boring valve ball cap endoporus, at described materials in the tube side face drilling through hole, at described materials in the tube the second end face cylindrical turning, at described the first end face cylindrical turning, described valve ball cap bore dia is less than described valve ball diameter, and hole depth is less than described valve ball radius in the described valve ball cap, finish the roughing of described valve ball cap, roughing valve rod mobile jib;
(2) valve rod mobile jib welding: weld described valve valve rod mobile jib at described materials in the tube the second end;
(3) fine finishing inner ball surface and valve rod: in described valve ball cap endoporus place's boring inner ball surface, and guarantee that described inner ball surface matches with described valve ball, described valve rod mobile jib, valve ball cap are carried out fine finishing and rolled thread screw thread on the valve rod mobile jib;
(4) assembling valve ball: described valve ball is placed in the described valve ball cap, and pushes the edge of described valve ball cap the first end, described valve ball is limited in the described valve ball cap also can keeps smooth and easy rotation.
In the technique scheme, 1040 ℃～1055 ℃ of temperature during described solution treatment, boring valve ball cap endoporus is the fixing of thimble when making things convenient for following process inner ball surface and automatic welding on materials in the tube, the clamping of materials in the tube when making things convenient for following process at materials in the tube the second end face cylindrical turning, the first end face cylindrical turning of materials in the tube be for the thickness that reduces the first end face edge during with convenient follow-up assembling easily and effectively extruding margin limit valve ball.
Because technique scheme is used, the present invention compared with prior art has following advantages:
1. the present invention adopts the valve ball of rotation to replace existing taper stem head, the advantage that the existing taper stem head such as simple in structure except having, that manufacturing is easy to maintenance, working stroke is little, opening and closing time is short has, can also improve sealing, impact resistance, corrosion resistance, the operational reliability of valve under high temperature and high pressure environment;
2. be provided with through hole on the valve ball cap of the present invention, utilize through hole can replace the effect of the external and internal pressure of valve ball and balance through hole inside, to prolong the working life of valve rod;
3. the melting type welding method of valve rod blank, compare with traditional built-up welding formula welding valve rod blank or integrated type processing valve rod, under the effect of special purpose machine tool and thimble, mechanical property requirements and the quality of product of good valve rod have not only been guaranteed, and increase substantially working efficiency, saved the cost of material of built-up welding formula welding valve rod blank or the processing of whole valve rod.
Description of drawings
Fig. 1 is valve ball cap sectional drawing;
Fig. 2 is the inner ball surface sectional drawing;
Fig. 3 is high temperature and high pressure cut-off valve valve rod figure.
Wherein: 1, valve rod mobile jib; 2, valve ball cap; 3, valve ball; 4, valve ball cap endoporus; 5, inner ball surface; 6, through hole; 7, outer ring; 8, end.
Embodiment
The invention will be further described below in conjunction with drawings and Examples:
Embodiment one: shown in accompanying drawing 1-3.
A kind of high temperature and high pressure cut-off valve valve rod, it comprises valve rod mobile jib 1, is fixedly installed on the valve ball cap 2 of valve rod mobile jib 1 one ends, freely rotates the valve ball 3 that is arranged in the valve ball cap 2, valve ball 3 one ends protrude outside valve ball cap 2, and valve ball 3 centre ofs sphere are positioned on valve rod mobile jib 1 axis.
A kind of high temperature and high pressure cut-off valve comprises the following steps: with the processing method of valve rod
Get materials in the tube and carry out solution treatment, Gu solubility temperature＞=1040 ℃, find coaxial clamping materials in the tube accurately and guarantee clamping with three jaw chuck, materials in the tube two ends end face car is smooth smooth, car materials in the tube cylindrical φ 20mm * 18mm, at materials in the tube the first end face center boring valve ball cap endoporus 4 φ 10mm * 5.5mm, the cutting materials in the tube guarantee length 16.3mm(+0.2mm,-0.0mm), deburring and check, find coaxial clamping materials in the tube accurately and guarantee clamping with three jaw chuck, car materials in the tube end face guarantees that materials in the tube length is 16mm, at materials in the tube the second end face center boring inner bore of step φ 8.5mm(+0.05mm ,-0.0mm) * 7mm (+0.0mm,-0.1mm), at materials in the tube the second end face one sidecar cylindrical φ 11mm * 1.5mm and 90 ° of oblique angles of car, deburring and check, the frock clamping part is also guaranteed to clamp, bore φ 2mm through hole 6 in the first hole, materials in the tube side and described inner bore of step joint and communicate deburring and check with endoporus.
Getting bar heat-treats, heat to 1040 ℃, heat again after cooling to 620 ℃ and tempering insulation cooling after 4 hours, find coaxial clamping materials in the tube accurately and guarantee clamping with three jaw chuck, with the smooth smooth and assurance size 91mm of materials in the tube two ends end face car, ride rank cylindrical φ 8mm(+0.15mm,-0.24mm) * 15mm, φ 5.5mm * 5mm and the 45° angle that falls, deburring and check, the side's of punching frock clamping part is also guaranteed to clamp, at position dimension from the end face 5mm side of punching, place and guarantee size 6mm(+0.02mm,-0.05mm) * 6mm(+0.02mm,-0.05mm), deburring and check, find coaxial clamping materials in the tube accurately and guarantee clamping with three jaw chuck, drill centers φ 2mm, ride rank cylindrical φ 8mm(+0.15mm ,-0.24mm) * 20.8mm, φ 4.9mm * 5mm and the 45° angle that falls, deburring and check, find coaxial clamping materials in the tube accurately and guarantee clamping with three jaw chuck, the car the other end guarantees size 90mm(+0.1mm ,-0.1mm), ride rank cylindrical φ 8.5mm(+0.0mm,-0.05mm) * 7mm, φ 9mm * 8mm(+0.05mm,-0.05mm), drill centers φ 2mm is so that center hole runs through the valve rod mobile jib, and deburring is also checked.
With valve rod mobile jib 1, valve ball cap 2 usefulness ultrasound deoil, degreasing etc. cleans up, valve rod mobile jib 1 is inserted in the valve ball cap 2, adopt the automatic welding of welding current 100A, welding rotational frequency 4.5Hz to weld, find coaxial clamping accurately and guarantee clamping with three jaw chuck, surfacing guarantees length 98mm, and boring inner ball surface 5 φ 14.1mm and assurance sphere center position and sphere are smooth, car valve ball cap 2 outer circumferential edge 7 φ 16.5mm(+0.0mm,-0.043mm) * 2mm and the 45° angle that falls, deburring and check.
With valve rod mobile jib 1, the valve ball cap 2 of the above, find coaxial clamping accurately and guarantee clamping with three jaw chuck, rolled thread M10X1-6h screw thread, long 29mm tests.Valve rod mobile jib 12 ends 8 carry out screw die rolled thread M5, deburring and check.
With ultrasonic equipment valve rod mobile jib 1 and valve ball cap 2 are cleaned up and dry up with the pneumatics air gun, with the valve ball 3 valve ball cap 2 of packing into, general turning machine low speed rotation also forms outer ring 7 with pressure ball roller extruding exterior rim valve ball 3 is limited in the valve ball cap 2, press that Automatic-falling must not appear in rear inspection valve ball 3 or rotation has some setbacks etc., the valve rod assembly that assembles is placed in the valve rod storage bracket.
In the present embodiment, valve ball cap 2 materials adopt austenite ASTM TP316H Stainless Steel Tube, and valve rod mobile jib 1 material adopts PH Stainless Steel 630, and valve ball 2 materials adopt Stellite20 alloy, the equal abate of the sharp edge that runs in course of working.The valve ball 3 of rotation replaces existing taper stem head, has improved the sealing of valve, shock-resistant, corrosion-resistant, operational reliability, and the material behavior of valve ball 3 can adapt to high temperature and high pressure environment and have long working life.
Claims (6)
1. high temperature and high pressure cut-off valve valve rod, it is characterized in that: it comprises the valve rod mobile jib, is fixedly installed on the valve ball cap of described valve rod mobile jib one end, freely rotates the valve ball that is arranged in the described valve ball cap, described valve ball one end protrudes outside described valve ball cap, and the described valve ball centre of sphere is positioned on the described valve rod mobile jib axis.
2. a kind of high temperature and high pressure cut-off valve valve rod according to claim 1, it is characterized in that: described valve ball cap side is provided with through hole.
3. a kind of high temperature and high pressure cut-off valve valve rod according to claim 1, it is characterized in that: the material of described valve ball is Stellite 20 alloys.
4. a kind of high temperature and high pressure cut-off valve according to claim 1 comprises the following steps: with the processing method of valve rod
(1) roughing valve ball cap and valve rod mobile jib: get materials in the tube and carry out solution treatment, at described materials in the tube the first end face boring valve ball cap endoporus, at described materials in the tube side face drilling through hole, at described materials in the tube the second end face cylindrical turning, at described the first end face cylindrical turning, described valve ball cap bore dia is less than described valve ball diameter, and hole depth is less than described valve ball radius in the described valve ball cap, finish the roughing of described valve ball cap, roughing valve rod mobile jib;
(2) valve rod mobile jib welding: weld described valve rod mobile jib at described materials in the tube the second end;
(3) fine finishing inner ball surface and valve rod: in described valve ball cap endoporus place's boring inner ball surface, and guarantee that described inner ball surface matches with described valve ball, described valve rod mobile jib, valve ball cap are carried out fine finishing and rolled thread screw thread on the valve rod mobile jib;
(4) assembling valve ball: described valve ball is placed in the described valve ball cap, and pushes the edge of described valve ball cap the first end, described valve ball is limited in the described valve ball cap also can keeps smooth and easy rotation.
5. a kind of high temperature and high pressure cut-off valve according to claim 3 is with the processing method of valve rod, and it is characterized in that: described through hole is communicated with described valve ball cap endoporus.
6. a kind of high temperature and high pressure cut-off valve according to claim 3 is characterized in that with the processing method of valve rod: described valve rod mobile jib and described valve ball cap be welded as automatic molten solder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210567525.4A CN103047441B (en) | 2012-12-24 | 2012-12-24 | Valve rod for high-temperature high-pressure stop valve and machining method of valve rod |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210567525.4A CN103047441B (en) | 2012-12-24 | 2012-12-24 | Valve rod for high-temperature high-pressure stop valve and machining method of valve rod |
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| CN103047441A true CN103047441A (en) | 2013-04-17 |
| CN103047441B CN103047441B (en) | 2014-08-13 |
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| CN201210567525.4A Expired - Fee Related CN103047441B (en) | 2012-12-24 | 2012-12-24 | Valve rod for high-temperature high-pressure stop valve and machining method of valve rod |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302453A (en) * | 2013-06-07 | 2013-09-18 | 浙江坤博机械制造有限公司 | Machining method for valve body of low temperature resistance hard seal check valve |
| KR101552498B1 (en) * | 2014-10-22 | 2015-09-11 | 주식회사 와이디솔루션 | Manufacturing Method of Stopper Bolt for Ball Valve |
| CN105546212A (en) * | 2016-03-01 | 2016-05-04 | 江苏神通阀门股份有限公司 | High-temperature valve rod structure and machining method thereof |
| CN109483177A (en) * | 2018-12-25 | 2019-03-19 | 浙江童氏汽车部件股份有限公司 | A kind of production technology of ball stud |
| CN113829008A (en) * | 2021-09-14 | 2021-12-24 | 瑞安市万泰汽车电器有限公司 | Method for manufacturing electric heating push rod of electronic thermostat of engine |
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Patent Citations (9)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103302453A (en) * | 2013-06-07 | 2013-09-18 | 浙江坤博机械制造有限公司 | Machining method for valve body of low temperature resistance hard seal check valve |
| CN103302453B (en) * | 2013-06-07 | 2015-06-10 | 浙江坤博机械制造有限公司 | Machining method for valve body of low temperature resistance hard seal check valve |
| KR101552498B1 (en) * | 2014-10-22 | 2015-09-11 | 주식회사 와이디솔루션 | Manufacturing Method of Stopper Bolt for Ball Valve |
| CN105546212A (en) * | 2016-03-01 | 2016-05-04 | 江苏神通阀门股份有限公司 | High-temperature valve rod structure and machining method thereof |
| CN109483177A (en) * | 2018-12-25 | 2019-03-19 | 浙江童氏汽车部件股份有限公司 | A kind of production technology of ball stud |
| CN109483177B (en) * | 2018-12-25 | 2019-11-05 | 浙江童氏汽车部件股份有限公司 | A kind of production technology of ball stud |
| CN113829008A (en) * | 2021-09-14 | 2021-12-24 | 瑞安市万泰汽车电器有限公司 | Method for manufacturing electric heating push rod of electronic thermostat of engine |
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| CN103047441B (en) | 2014-08-13 |
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Granted publication date: 20140813 Termination date: 20191224 |