CN102728918A - Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding - Google Patents
Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding Download PDFInfo
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- CN102728918A CN102728918A CN2012101943051A CN201210194305A CN102728918A CN 102728918 A CN102728918 A CN 102728918A CN 2012101943051 A CN2012101943051 A CN 2012101943051A CN 201210194305 A CN201210194305 A CN 201210194305A CN 102728918 A CN102728918 A CN 102728918A
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- China
- Prior art keywords
- stainless steel
- valve rod
- annular space
- spool
- scolder
- 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.)
- Granted
Links
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 42
- 239000010935 stainless steel Substances 0.000 title claims abstract description 42
- 238000000034 method Methods 0.000 title claims abstract description 25
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 title abstract 2
- 230000004907 flux Effects 0.000 claims abstract description 19
- 239000010425 asbestos Substances 0.000 claims abstract description 8
- 229910052895 riebeckite Inorganic materials 0.000 claims abstract description 8
- VZGDMQKNWNREIO-UHFFFAOYSA-N tetrachloromethane Chemical compound ClC(Cl)(Cl)Cl VZGDMQKNWNREIO-UHFFFAOYSA-N 0.000 claims abstract description 8
- 238000005476 soldering Methods 0.000 claims abstract description 7
- 238000005238 degreasing Methods 0.000 claims abstract description 4
- 239000002893 slag Substances 0.000 claims abstract description 4
- 229910000679 solder Inorganic materials 0.000 claims description 13
- TVZPLCNGKSPOJA-UHFFFAOYSA-N copper zinc Chemical compound [Cu].[Zn] TVZPLCNGKSPOJA-UHFFFAOYSA-N 0.000 claims description 12
- 238000007689 inspection Methods 0.000 claims description 9
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 6
- QFXZANXYUCUTQH-UHFFFAOYSA-N ethynol Chemical group OC#C QFXZANXYUCUTQH-UHFFFAOYSA-N 0.000 claims description 6
- 229910052709 silver Inorganic materials 0.000 claims description 6
- 239000004332 silver Substances 0.000 claims description 6
- 238000003466 welding Methods 0.000 claims description 6
- 241000972773 Aulopiformes Species 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 235000019515 salmon Nutrition 0.000 claims description 3
- 239000010959 steel Substances 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 2
- 239000003245 coal Substances 0.000 abstract description 6
- 230000001105 regulatory effect Effects 0.000 abstract description 5
- 239000010866 blackwater Substances 0.000 abstract 2
- 238000007605 air drying Methods 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000003754 machining Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000002309 gasification Methods 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000002002 slurry Substances 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004663 powder metallurgy Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 1
- 239000002956 ash Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- -1 vapour Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Lift Valve (AREA)
Abstract
The invention discloses a method for connecting a WC (Wolfram Carbide) valve core with a stainless steel valve rod through thermal bonding. The method comprises the steps of: firstly checking whether an annular space exists at a position where the WC valve core is connected with the stainless steel valve rod, if no, machining a single-sided V-shaped annular space at one side of the stainless steel valve rod, and removing burs; rinsing and degreasing with pure carbon tetrachloride, and air-drying at room temperature; placing a trim on a support, slowly preheating the position where the WC valve core is connected with the stainless steel valve rod until the WC valve core becomes darkled and the stainless steel rod becomes orange-red; and finally conducting hot bonding to the trim at the annular space, fast wrapping the trim with an asbestos quilt for insulating after the annular space is filled with soldering flux sufficiently and evenly, naturally cooling to the room temperature, removing the asbestos quilt, and grinding the molten slag on the surface, thus completing the connection. The method solves the problem that the WC valve core in the trim of the existing black water regulating valve is easy to fall, maintains the long-period stable running of a black water regulation system in a coal gasifying device, and saves the production cost.
Description
Technical field
The invention belongs to Coal Chemical Industry gasification installation Heisui River control valve technical field, relate to a kind of method that connects WC spool and stainless steel valve rod through hot adhesion.
Background technology
At present, the fluid operating pressure of the Heisui River system in the large-scale Coal-water Slurry Pressurized Gasification Unit is high, the high easy fouling of medium content of ashes; There are water, vapour, particle three-phase stream; The WC spool usually comes off, and stops up runner, is the point occurred frequently with the fault frequency of going wrong in the Coal Chemical Industry gasification installation; Seriously perplex the normal operation of Heisui River control valve always, also restricting the normal operation of gasification installation simultaneously.
6.5MPa it is that upstream pressure is respectively 6.73MPa, 6.36MPa that outlet of coal water slurry pressurized gasifier quench chamber and carbon are washed the Heisui River washing adjusting operating mode of tower outlet, pressure reduction is respectively 1.62MPa, 1.25MPa, and the Heisui River temperature is 249 ℃.Though there is three-phase stream, because WC spool hardness is more than the HRC90, wearability is good, so spool only otherwise come off, its life cycle is at least more than 2 years.But because coming off of spool causes runner blocked, spool receives vibrations, collision and damages, and has to start the bypass manual operation, and quality of regulation worsens rapidly.
Tungsten carbide trim goods are products of applied powder metallurgy technology, when making spool valve seat product with the powder metallurgy mode, at first need the WC powder body material that configure be pressed into the shape of design through mould through shaping dies, carry out sintering then.Tungsten carbide valve core material hardness is very high, and its hardness is about HRC90, can't use the mode of molten solder to be connected with the stainless steel valve rod, and the mode that at present external control valve company generally adopts screw thread to add pin connects.Its method is that spool is held with valve rod with screw rod and linked, and it is fixing to add pin again.Owing to there are reasons such as three-phase stream, pipe vibration and pressure reduction are big in the Heisui River operating mode, the WC spool very easily comes off, the new product trim of general offshore company, and moving two all left and right sides spools will come off.
Summary of the invention
The purpose of this invention is to provide and a kind ofly connect the method for WC spool and stainless steel valve rod, solved the problem that the WC spool very easily comes off in the trim of existing Heisui River control valve through hot adhesion.
The technical scheme that the present invention adopted is, a kind ofly connects the method for WC spool and stainless steel valve rod through hot adhesion, enforcement according to the following steps,
Step 1, whether inspection WC spool and stainless steel valve rod junction have annular space, are regarded as not having annular space like annular space smaller or equal to 0.15 millimeter, have been regarded as annular space greater than 0.15 millimeter.
If no annular space, stainless steel valve rod one side in WC spool and stainless steel valve rod contact site processes single face V-ring crack, and removes surperficial burr;
Step 2 is cleaned and degreasing WC spool and stainless steel valve rod junction with pure carbon tetrachloride, and is at room temperature air-dry then;
Step 3; To place on the stable support through the trim that step 2 is handled, and avoid the support vibrations, preheating is slowly carried out with the flame envelope of oxy-acetylene flame in WC spool and stainless steel valve rod junction; Flame must cover the WC spool; Rotate the WC spool and evenly heat up while heating, be kermesinus until the WC spool, the stainless steel valve rod is salmon pink;
Step 4 is implemented heat bonding to adopt oxy-acetylene welding through the trim of step 3 preheating at the annular space place, treat that scolder fills up behind the annular space rapidly with the asbestos trim insulation that is wrapped fully, uniformly; After waiting to naturally cool to room temperature; Remove the asbestos quilt, and grind off the slag on surface.
Characteristics of the present invention also are,
The degree of depth in single face V-ring crack is 3 millimeters in the step 1, and width is 0.5 millimeter.
Be 10-15 minute preheating time in the step 3.
If there is annular space inspection WC spool and stainless steel valve rod junction in the step 2, then the scolder in the step 4 is HL103 copper zinc solder or HL322 cadmium-free silver-base scolder.
Wherein the diameter of HL103 copper zinc solder is 2～2.5 millimeters, carries out before the heat bonding HL103 copper zinc solder being dried 1 hour under 150 ℃ temperature.
When step 4 was carried out heat bonding, if scolder is the HL103 copper zinc solder, then flux was selected CJ101 stainless steel and heat resisting steel gas welding flux for use; If scolder is a HL322 cadmium-free silver-base scolder, then flux is selected the special silver soldering flux of QJ103 for use.
If inspection WC spool (2) does not have annular space with stainless steel valve rod (1) junction in the step 2, then the scolder in the step 4 is a HL322 cadmium-free silver-base scolder.
Wherein the diameter of HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before the heat bonding HL322 cadmium-free silver-base scolder being dried 1 hour under 150 ℃ temperature.
Flux was selected the special silver soldering flux of QJ103 for use when step 4 was carried out heat bonding.
The invention has the beneficial effects as follows; To connect through screw rod originally through hot adhesion; The fixing trim of pin further connects; Having guaranteed can not influence the normal use of Heisui River control valve because of the WC spool comes off at coal gasification apparatus Heisui River control valve in an overhaul life, effectively safeguarded the long-period stable operation of gasification Heisui River regulating system.
Description of drawings
Fig. 1 is the structural representation of trim.
Among the figure, 1. stainless steel valve rod, 2.WC spool.
The specific embodiment
Below in conjunction with the accompanying drawing and the specific embodiment the present invention is elaborated.
The present invention provides a kind of method through hot adhesion connection WC spool and stainless steel valve rod, implements according to the following steps,
Step 1, to the trim that WC spool 2 is connected with stainless steel valve rod 1, horizontal pin is fixed being checked, as shown in Figure 1 through screw rod; Whether inspection WC spool 2 has annular space with stainless steel valve rod 1 junction; Be less than or equal to 0.15 millimeter like annular space and be regarded as not having annular space, be regarded as annular space greater than 0.15 millimeter, if no annular space; Stainless steel valve rod 1 one sides in WC spool 2 and stainless steel valve rod 1 contact site process single face V-ring crack; The degree of depth in single face V-ring crack is 3 millimeters, and width is 0.5 millimeter, and removes surperficial burr;
Step 2 is cleaned and degreasing WC spool 2 and stainless steel valve rod 1 junction with pure carbon tetrachloride, and is at room temperature air-dry then;
Step 3 will place on the stable support through the trim that step 2 is handled, and avoids the support vibrations; Preheating is slowly carried out with the flame envelope of oxy-acetylene flame in WC spool 2 and stainless steel valve rod 1 junction; Flame must cover WC spool 2, rotates WC spool 2 and evenly heats up while heat, and is kermesinus until WC spool 2; Stainless steel valve rod 1 is salmon pink, and whole preheating duration must be 10-15 minute;
Step 4 is implemented heat bonding to adopt oxy-acetylene welding through the trim of step 3 preheating at the annular space place, treat that scolder fills up behind the annular space rapidly with the asbestos trim insulation that is wrapped fully, uniformly; After waiting to naturally cool to room temperature; Remove the asbestos quilt, and grind off the slag on surface.
Wherein, If inspection WC spool 2 has annular space with stainless steel valve rod 1 junction in the step 2; Annular space can be processed single face V-ring crack greater than 0.20 millimeter, and then the scolder in the step 4 is HL103 copper zinc solder or HL322 cadmium-free silver-base scolder; If scolder is the HL103 copper zinc solder, then flux is selected CJ101 stainless steel and heat resisting steel gas welding flux for use; If scolder is a HL322 cadmium-free silver-base scolder, then flux is selected the special silver soldering flux of QJ103 for use, and the diameter of HL103 copper zinc solder is 2～2.5 millimeters, carries out before the heat bonding HL103 copper zinc solder being dried 1 hour under 150 ℃ temperature.
If inspection WC spool 2 does not have annular space with stainless steel valve rod 1 junction in the step 2; Then the scolder in the step 4 is a HL322 cadmium-free silver-base scolder; It is better that this scolder melts the back flowability; Flux is selected the special silver soldering flux of QJ103 for use when carrying out heat bonding, and the diameter of HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before the heat bonding HL322 cadmium-free silver-base scolder being dried 1 hour under 150 ℃ temperature.
Method of the present invention has solved the problem that regulating system long curved neck venturi angle valve WC spool in Heisui River comes off easily in the Coal-water Slurry Pressurized Gasification Unit in actual moving process; Guaranteed the quality of regulation of this operating mode; Guaranteed the service life of expensive special material trim; Having guaranteed can not influence the Heisui River control valve because of the WC spool comes off in an overhaul life of coal gasification apparatus (a year and a half); Promptly length is bent the normal use of neck venturi angle valve, has effectively safeguarded the long-period stable operation of gasification Heisui River regulating system.
In Coal-water Slurry Pressurized Gasification Unit; 6.5MPa, in the gasification furnace of diameter 2800mm and diameter 3200mm, the Heisui River regulating system disposes long curved neck venturi angle valve, item is FV-1304ABCD, FV-1312A1B1C1D1D2, PV-1401AB, PV-624D1D2, LV-1403, LV-62403 and PV-1405 etc.; Heisui River angle valve manufacturer is a De Laisai Masoneilan company; Specification is 2 "～6 ", ANSI 900Lb, and the every cover of its WC trim price different size is 14 to 200,000 yuans not to be waited, and next cover trim of normal condition should use 1 year at least; But owing to there is the spool problem that comes off, once cover trim in most cases month less than having come off.Adopt method of the present invention, the WC trim adopts heat bonding to handle, and a cover trim can use and can not come off in one to two year.Practice thrift the conservative estimation of a cover trim according to the curved neck venturi angle valve of an annual director, only first phase, the second stage of device Heisui River valve trim were practiced thrift 210 to 3,000,000 yuan in 1 year.Get off for many years, beneficial effect is very considerable.
Claims (9)
1. the method through hot adhesion connection WC spool and stainless steel valve rod is characterized in that, implement according to the following steps,
Step 1, whether inspection WC spool (2) has annular space with stainless steel valve rod (1) junction, is less than or equal to 0.15 millimeter like annular space and is regarded as not having annular space, then has been regarded as annular space greater than 0.15 millimeter,
If no annular space, stainless steel valve rod (1) one side in WC spool (2) and stainless steel valve rod (1) contact site processes single face V-ring crack, and removes surperficial burr;
Step 2 is cleaned and degreasing WC spool (2) and stainless steel valve rod (1) junction with pure carbon tetrachloride, and is at room temperature air-dry then;
Step 3; To place on the stable support through the trim that step 2 is handled, and avoid the support vibrations, preheating is slowly carried out with the flame envelope of oxy-acetylene flame in WC spool (2) and stainless steel valve rod (1) junction; Flame must cover WC spool (2); Rotate evenly intensification of WC spool (2) while heating, be kermesinus until WC valve (2) core, stainless steel valve rod (1) is salmon pink;
Step 4 is implemented heat bonding to adopt oxy-acetylene welding through the trim of step 3 preheating at the annular space place, treat that scolder fills up behind the annular space rapidly with the asbestos trim insulation that is wrapped fully, uniformly; After waiting to naturally cool to room temperature; Remove the asbestos quilt, and grind off the slag on surface.
2. method according to claim 1 is characterized in that, the degree of depth in single face V-ring crack is 3 millimeters in the said step 1, and width is 0.5 millimeter.
3. method according to claim 1 is characterized in that, be 10-15 minute preheating time in the step 3.
4. method according to claim 1 is characterized in that, if inspection WC spool (2) has annular space with stainless steel valve rod (1) junction in the step 2, then the scolder in the step 4 is HL103 copper zinc solder or HL322 cadmium-free silver-base scolder.
5. method according to claim 4 is characterized in that, the diameter of said HL103 copper zinc solder is 2～2.5 millimeters, carries out before the heat bonding HL103 copper zinc solder being dried 1 hour under 150 ℃ temperature.
6. method according to claim 4 is characterized in that, when step 4 was carried out heat bonding, if scolder is the HL103 copper zinc solder, then flux was selected CJ101 stainless steel and heat resisting steel gas welding flux for use; If scolder is a HL322 cadmium-free silver-base scolder, then flux is selected the special silver soldering flux of QJ103 for use.
7. method according to claim 1 is characterized in that, if inspection WC spool (2) does not have annular space with stainless steel valve rod (1) junction in the step 2, then the scolder in the step 4 is a HL322 cadmium-free silver-base scolder.
8. method according to claim 7 is characterized in that, the diameter of said HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before the heat bonding HL322 cadmium-free silver-base scolder being dried 1 hour under 150 ℃ temperature.
9. method according to claim 7 is characterized in that, flux was selected the special silver soldering flux of QJ103 for use when step 4 was carried out heat bonding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210194305.1A CN102728918B (en) | 2012-06-13 | 2012-06-13 | Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210194305.1A CN102728918B (en) | 2012-06-13 | 2012-06-13 | Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102728918A true CN102728918A (en) | 2012-10-17 |
| CN102728918B CN102728918B (en) | 2014-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210194305.1A Active CN102728918B (en) | 2012-06-13 | 2012-06-13 | Method for connecting WC (Wolfram Carbide) valve core with stainless steel valve rod through thermal bonding |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364244A (en) * | 2015-12-21 | 2016-03-02 | 刘丹 | Welding method of hard alloy and stainless steel composite rod pin |
| CN110181136A (en) * | 2019-06-28 | 2019-08-30 | 吴忠仪表有限责任公司 | Tab (s) formula labyrinth valve cage mounted structure method for welding |
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| JPH0337166A (en) * | 1989-07-04 | 1991-02-18 | Eagle Ind Co Ltd | Adhesion between ceramics and metal |
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| CN1459350A (en) * | 2002-05-17 | 2003-12-03 | 佑能工具股份有限公司 | Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool |
| CN101596635A (en) * | 2009-07-10 | 2009-12-09 | 攀枝花新钢钒股份有限公司 | The composite overlaying method of a kind of used for hot dip galvanizing sinking roller and stable roller |
| JP2010052015A (en) * | 2008-08-28 | 2010-03-11 | Nhk Spring Co Ltd | Method for producing different material-joined body and different material-joined body by the method |
| CN101700592A (en) * | 2009-11-27 | 2010-05-05 | 哈尔滨工业大学 | Method for soldering specific metal difficult to solder by ion injection deposition pretreatment |
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2012
- 2012-06-13 CN CN201210194305.1A patent/CN102728918B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0337166A (en) * | 1989-07-04 | 1991-02-18 | Eagle Ind Co Ltd | Adhesion between ceramics and metal |
| CN2512197Y (en) * | 2001-10-11 | 2002-09-18 | 林芳贤 | Small drill for soldering circuit board |
| CN1459350A (en) * | 2002-05-17 | 2003-12-03 | 佑能工具股份有限公司 | Method for jointing alloy structure part and stainless steel structural part and method for mfg. cutting tool |
| JP2010052015A (en) * | 2008-08-28 | 2010-03-11 | Nhk Spring Co Ltd | Method for producing different material-joined body and different material-joined body by the method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105364244A (en) * | 2015-12-21 | 2016-03-02 | 刘丹 | Welding method of hard alloy and stainless steel composite rod pin |
| CN110181136A (en) * | 2019-06-28 | 2019-08-30 | 吴忠仪表有限责任公司 | Tab (s) formula labyrinth valve cage mounted structure method for welding |
| CN110181136B (en) * | 2019-06-28 | 2021-08-10 | 吴忠仪表有限责任公司 | Brazing method for butterfly piece type labyrinth valve cage installation structure |
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| Publication number | Publication date |
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| CN102728918B (en) | 2014-06-25 |
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Effective date of registration: 20240219 Address after: 714026 Weihua Factory, No. 70, West Section of Dongfeng Street, High tech Industrial Development Zone, Weinan City, Shaanxi Province Patentee after: Shaanxi Weihe Chemical Technology Co.,Ltd. Country or region after: China Address before: 714000 No. 34, Dongfeng Street, high tech Industrial Development Zone, Weinan City, Shaanxi Province Patentee before: Shaanxi Weihe Coal Chemical Group Co.,Ltd. Country or region before: China |