CN106838338A - A kind of low temperature regulating valve and its welding procedure - Google Patents
A kind of low temperature regulating valve and its welding procedure Download PDFInfo
- Publication number
- CN106838338A CN106838338A CN201710137372.2A CN201710137372A CN106838338A CN 106838338 A CN106838338 A CN 106838338A CN 201710137372 A CN201710137372 A CN 201710137372A CN 106838338 A CN106838338 A CN 106838338A
- Authority
- CN
- China
- Prior art keywords
- valve
- valve body
- welding
- weld seam
- valve seat
- 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.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/164—Arc welding or cutting making use of shielding gas making use of a moving fluid
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/16—Arc welding or cutting making use of shielding gas
- B23K9/167—Arc welding or cutting making use of shielding gas and of a non-consumable electrode
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K9/00—Arc welding or cutting
- B23K9/235—Preliminary treatment
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K1/00—Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
- F16K1/32—Details
- F16K1/34—Cutting-off parts, e.g. valve members, seats
- F16K1/46—Attachment of sealing rings
- F16K1/465—Attachment of sealing rings to the valve seats
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K27/00—Construction of housing; Use of materials therefor
- F16K27/10—Welded housings
- F16K27/102—Welded housings for lift-valves
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- Prostheses (AREA)
Abstract
The invention discloses a kind of low temperature regulating valve, include valve body, valve seat and valve element composition, the valve seat in the valve body lower end portion is provided with the outlet with valve seat one, the bottom of valve element is provided with dismountable valve core case in the valve body, the bottom of the valve core case is sealed and installed with seal nipple by sealing ring, and the outer surface of the sealing ring is tapered slope.The present invention greatly reduces influence of the welding deformation to valve reliability using unique seat design；The ingenious use of welding tooling, reduces caused valve body bending, loosening and deformation in valve body welding process, improves the reliability of product；Sealing property reliability, using inclined-plane ring structure and removable separation valve element, substantially increases self centering ability and sealing effectiveness of valve element.
Description
Technical field：
The present invention relates to Subzero valve technical field, a kind of low temperature regulating valve and its welding procedure are related generally to.
Background technology：
Low temperature regulating valve, is primarily referred to as being used adjacent to liquid nitrogen temperature and following cryogenic system, such as LNG, liquid hydrogen, particularly
Cryogenic system.Domestic very great cryogenic system such as superconducting Tokamak, high-intensity magnetic field, superconducting accelerator, negative ions head-on collision
Machine, Aero-Space are required for using low temperature regulating valve.
Low temperature regulating valve, due to extremely low operating temperature, valve easily causes valve stuck or close because of low-temperature deformation
Sealing property fails and produces leakage, while valve connecting pipe is also because low-temperature shrink can be produced necessarily to valve at low temperature
Pulling force, causes valve body deformation and reveals.General valve seat has four road weld seams, and two ends valve seat and valve rod connecting place are inevitably welded
Seam, valve seat and its valve for coordinating import and export the weld seam between pipeline, and the principal element of valve body deformation when outlet conduit is welding is special
Do not reveal not easily, so as to influence the total quality of valve.Therefore profound hypothermia regulating valve will to the manufacturing process and structure design of valve
Ask very high；The enterprise or company of the reliable such profound hypothermia regulating valve of manufacture that do not succeed also domestic at present.
The content of the invention：
The object of the invention is exactly to make up the defect of prior art, there is provided a kind of low temperature regulating valve and its welding procedure, from weldering
Connect the reliability for ensureing valve in manufacturing process with two aspects of structure design.
The present invention is achieved by the following technical solutions：
A kind of low temperature regulating valve, includes valve body, valve seat and valve element composition, it is characterised in that：The valve seat in the valve body lower end portion
The outlet with valve seat one is provided with, the bottom of valve element is provided with dismountable valve core case, the valve core case in the valve body
Bottom seal nipple is sealed and installed with by sealing ring, the outer surface of the sealing ring is tapered slope.
The welding procedure of described low temperature regulating valve, it is characterised in that：Its concrete technology step is as follows：
（1）, indoors under no-wind environment, valve body and valve seat are installed on welding tooling first, the welding tooling is included
For through the supporting rod in the middle part of valve body, the supporting rod is respectively arranged at two ends with grip block, and the two ends of the grip block pass through
Clamping nut check；After valve body and valve seat are assembled by welding tooling, rotating chuck is installed at the horizontal two ends of supporting rod；
（2）, using the region of absolute alcohol clean welds 20mm scopes, adjust chuck rotating speed, speed of welding is reached 700mm/
min；
（3）, to the argon gas that purity is 99.99% is passed through in valve body, its flow is 8~10L/min, using 1.6mm diameter tungsten electrodes,
Regulation welding current is 25-28A, weldingvoltage 2-21v, and down, tungsten electrode extends 8-10mm, nozzle to workpiece distance to welding gun
10mm, makes tip just to valve body axle center；
（4）, by tip the weld seam of the weld seam and inlet tube and valve seat junction of two ends valve seat and valve body junction is distinguished
Three-point fix weldering is carried out, the weld seam of valve seat where inlet tube end and valve body junction is welded first, prepare one piece of aqueous humidity
Cotton, in order to reduce welding deformation caused by heat input, when welding stops, cooling down weld seam both sides, but need to keep away with damp cloth immediately
Cooling commissure is opened, in case weld seam play is cold cracking；Rotating disk does not stop simultaneously, and weld seam is uniformly cooled down with compressed air,
Start the weld seam of welding inlet tube and valve seat junction again after weld seam is thoroughly cooled down, finally weld the valve seat of the valve body other end
With the weld seam of valve body junction；Its welding method all same, the valve body and valve seat that will be welded is suspended on support frame vertically, is put
Enter heating furnace and be heated to 100-150 DEG C, holding carries out Ageing Treatment in 5-20 hours, to eliminate the residual stress produced during welding,
Stabilizing tissue and size, you can assembled with valve element.
Improvement on valve seat construction：
When valve seat is processed, the distance of proper extension outlet to valve seat axis eliminates when weld seam is welded herein and valve seat is welded
The influence of deformation.
The technologic improvement of welding production：
Low temperature regulation valve body is very long, and in welding process, valve body easily bends and becomes with type, so a kind of special tooling is designed,
Valve body is blocked, does not allow valve body components to loosen.And two ends are placed on roller, are driven by motor and rotated, regulation motor during welding
Velocity of rotation, can control speed of welding and make welding uniform.Compound seal technique is used between valve element and valve rod, by sealing ring
Inclined-plane is processed into, when with valve base sealing, not only one effect of side sealing, while as sealing surface is further compressed,
Valve seat can make sealing ring produce a plane, and a flat seal effect is produced again, while inclined-plane sealing has automatic capturing work(
Energy.It is removable when can not meet valve element inclined-plane automatic capturing function because of a variety of causes such as low-temperature deformation, pipe tensions in valve body
Separate valve element and strengthen automatic capturing ability so that valve element and the perfect closure of valve seat, reach sealing effectiveness.
It is an advantage of the invention that：
1st, unique seat design, greatly reduces influence of the welding deformation to valve reliability.
2nd, the ingenious use of welding tooling, reduces caused valve body bending, loosening and deformation in valve body welding process,
Improve the reliability of product.
3rd, sealing property reliability, using inclined-plane ring structure and removable separation valve element, substantially increase valve element from
My centering ability and sealing effectiveness.
Brief description of the drawings：
Fig. 1 is the structural representation that valve body of the present invention coordinates with valve seat.
Fig. 2 is structural representation of the invention.
Fig. 3 is tool structure schematic diagram of the invention.
Fig. 4 is the structural representation after valve element modification of the present invention.
Specific embodiment：
Referring to accompanying drawing.
A kind of low temperature regulating valve, includes valve body 1, valve seat 2 and valve element 3 and constitutes, and is provided with the valve seat of the bottom of valve body 1
With the outlet 4 of the one of valve seat 2, the bottom of valve element 3 in valve body 1 is provided with dismountable valve core case, and the bottom of valve core case leads to
Cross sealing ring 5 and be sealed and installed with seal nipple 6, the outer surface of sealing ring 5 is tapered slope.
The welding procedure of described low temperature regulating valve, it is characterised in that：Its concrete technology step is as follows：
（1）, indoors under no-wind environment, valve body 1 and valve seat 2 are installed on welding tooling first, the welding tooling includes
Have for through the supporting rod 3 in the middle part of valve body, supporting rod 3 is respectively arranged at two ends with grip block 4, and the two ends of grip block 4 are by folder
Nut 5 is held to lock；After valve body 1 and valve seat 2 are assembled by welding tooling, rotation card is installed at the horizontal two ends of supporting rod 3
Disk；
（2）, using the region of absolute alcohol clean welds 20mm scopes, adjust chuck rotating speed, speed of welding is reached 700mm/
min；
（3）, to the argon gas that purity is 99.99% is passed through in valve body, its flow is 8~10L/min, using 1.6mm diameter tungsten electrodes,
Regulation welding current is 25-28A, weldingvoltage 2-21v, and down, tungsten electrode extends 8-10mm, nozzle to workpiece distance to welding gun
10mm, makes tip just to valve body axle center；
（4）, by tip to the weld seam 11,12 and inlet tube 8 of two ends valve seat and valve body junction and the weldering of valve seat junction
Seam 7 carries out three-point fix weldering, and the weld seam 12 of valve seat where inlet tube end and valve body junction is welded first, and one piece of preparation is aqueous
Moist cotton, in order to reduce welding deformation caused by heat input, when welding stops, cooling down weld seam both sides with damp cloth immediately, but
Need to avoid cooling down commissure, in case weld seam play is cold cracking；Rotating disk does not stop simultaneously, weld seam is carried out with compressed air uniform cold
But, start to weld the weld seam 7 of inlet tube and valve seat junction again after weld seam is thoroughly cooled down, finally weld the valve body other end
Valve seat and the weld seam 11 of valve body junction；Its welding method all same, the valve body that will be welded and valve seat are suspended on support vertically
On frame, it is put into heating furnace and is heated to 100-150 DEG C, holding carries out Ageing Treatment in 5-20 hours, eliminates produced during welding residual
Residue stress, stabilizing tissue and size, you can assembled with valve element 10.
Claims (2)
1. a kind of low temperature regulating valve, includes valve body, valve seat and valve element composition, it is characterised in that：The valve in the valve body lower end portion
Seat is provided with the outlet with valve seat one, and the bottom of valve element is provided with dismountable valve core case, the valve element in the valve body
The bottom of seat is sealed and installed with seal nipple by sealing ring, and the outer surface of the sealing ring is tapered slope.
2. the welding procedure of low temperature regulating valve according to claim 1, it is characterised in that：Its concrete technology step is as follows：
（1）, indoors under no-wind environment, valve body and valve seat are installed on welding tooling first, the welding tooling is included
For through the supporting rod in the middle part of valve body, the supporting rod is respectively arranged at two ends with grip block, and the two ends of the grip block pass through
Clamping nut check；After valve body and valve seat are assembled by welding tooling, rotating chuck is installed at the horizontal two ends of supporting rod；
（2）, using the region of absolute alcohol clean welds 20mm scopes, adjust chuck rotating speed, speed of welding is reached 700mm/
min；
（3）, to the argon gas that purity is 99.99% is passed through in valve body, its flow is 8~10L/min, using 1.6mm diameter tungsten electrodes,
Regulation welding current is 25-28A, weldingvoltage 2-21v, and down, tungsten electrode extends 8-10mm, nozzle to workpiece distance to welding gun
10mm, makes tip just to valve body axle center；
（4）, by tip the weld seam of the weld seam and inlet tube and valve seat junction of two ends valve seat and valve body junction is distinguished
Three-point fix weldering is carried out, the weld seam of valve seat where inlet tube end and valve body junction is welded first, prepare one piece of aqueous humidity
Cotton, in order to reduce welding deformation caused by heat input, when welding stops, cooling down weld seam both sides, but need to keep away with damp cloth immediately
Cooling commissure is opened, in case weld seam play is cold cracking；Rotating disk does not stop simultaneously, and weld seam is uniformly cooled down with compressed air,
Start the weld seam of welding inlet tube and valve seat junction again after weld seam is thoroughly cooled down, finally weld the valve seat of the valve body other end
With the weld seam of valve body junction；Its welding method all same, the valve body and valve seat that will be welded is suspended on support frame vertically, is put
Enter heating furnace and be heated to 100-150 DEG C, holding carries out Ageing Treatment in 5-20 hours, to eliminate the residual stress produced during welding,
Stabilizing tissue and size, you can assembled with valve element.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137372.2A CN106838338B (en) | 2017-03-09 | 2017-03-09 | A kind of welding procedure of low temperature regulating valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710137372.2A CN106838338B (en) | 2017-03-09 | 2017-03-09 | A kind of welding procedure of low temperature regulating valve |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106838338A true CN106838338A (en) | 2017-06-13 |
| CN106838338B CN106838338B (en) | 2019-01-15 |
Family
ID=59143314
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710137372.2A Active CN106838338B (en) | 2017-03-09 | 2017-03-09 | A kind of welding procedure of low temperature regulating valve |
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| Country | Link |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695602A (en) * | 2017-12-04 | 2018-02-16 | 沈阳航天新光集团有限公司 | Piping truss welding and heat treatment positioner and localization method |
| CN113102911A (en) * | 2021-04-14 | 2021-07-13 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752028C2 (en) * | 1997-11-24 | 1999-09-30 | Siemens Ag | Method for adjusting the valve needle stroke in metering valves and metering valve with valve needle stroke adjusted according to this method |
| CN202545843U (en) * | 2012-04-23 | 2012-11-21 | 维士威（上海）控制阀门有限公司 | Low-temperature aluminum alloy angle valve with core-puling top |
| CN203082317U (en) * | 2012-11-30 | 2013-07-24 | 无锡智能自控工程股份有限公司 | Forging aluminum low-temperature angle valve |
| CN203115123U (en) * | 2013-04-02 | 2013-08-07 | 浙江贝尔控制阀门有限公司 | Aluminum angle valve for pumping outside internal parts |
| CN104209637A (en) * | 2014-07-31 | 2014-12-17 | 江苏星河阀门有限公司 | Welding method of high-temperature and high-pressure corrugated pipe cutoff valve |
| CN204573125U (en) * | 2015-01-16 | 2015-08-19 | 杭州金奥阀门制造有限公司 | Manual low temperature low temperature valve |
| CN204756133U (en) * | 2015-06-23 | 2015-11-11 | 江苏神通阀门股份有限公司 | Low -temp stop valve |
-
2017
- 2017-03-09 CN CN201710137372.2A patent/CN106838338B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19752028C2 (en) * | 1997-11-24 | 1999-09-30 | Siemens Ag | Method for adjusting the valve needle stroke in metering valves and metering valve with valve needle stroke adjusted according to this method |
| CN202545843U (en) * | 2012-04-23 | 2012-11-21 | 维士威（上海）控制阀门有限公司 | Low-temperature aluminum alloy angle valve with core-puling top |
| CN203082317U (en) * | 2012-11-30 | 2013-07-24 | 无锡智能自控工程股份有限公司 | Forging aluminum low-temperature angle valve |
| CN203115123U (en) * | 2013-04-02 | 2013-08-07 | 浙江贝尔控制阀门有限公司 | Aluminum angle valve for pumping outside internal parts |
| CN104209637A (en) * | 2014-07-31 | 2014-12-17 | 江苏星河阀门有限公司 | Welding method of high-temperature and high-pressure corrugated pipe cutoff valve |
| CN204573125U (en) * | 2015-01-16 | 2015-08-19 | 杭州金奥阀门制造有限公司 | Manual low temperature low temperature valve |
| CN204756133U (en) * | 2015-06-23 | 2015-11-11 | 江苏神通阀门股份有限公司 | Low -temp stop valve |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107695602A (en) * | 2017-12-04 | 2018-02-16 | 沈阳航天新光集团有限公司 | Piping truss welding and heat treatment positioner and localization method |
| CN113102911A (en) * | 2021-04-14 | 2021-07-13 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
| CN113102911B (en) * | 2021-04-14 | 2021-10-29 | 营口诚源机械设备有限公司 | Low-deformation vertical welding structure and process |
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| Publication number | Publication date |
|---|---|
| CN106838338B (en) | 2019-01-15 |
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