CN102728918B - 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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- CN102728918B CN102728918B CN201210194305.1A CN201210194305A CN102728918B CN 102728918 B CN102728918 B CN 102728918B CN 201210194305 A CN201210194305 A CN 201210194305A CN 102728918 B CN102728918 B CN 102728918B
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- stainless steel
- valve rod
- spool
- annular space
- scolder
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- 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 26
- 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
- 238000001816 cooling Methods 0.000 claims abstract description 4
- 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
- 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
- 238000004140 cleaning Methods 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
- 230000001105 regulatory effect Effects 0.000 abstract description 11
- 239000010866 blackwater Substances 0.000 abstract description 8
- 239000003245 coal Substances 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 2
- 238000007605 air drying Methods 0.000 abstract 1
- 238000003754 machining 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
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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 black water regulating valve technical field, relate to a kind of method that connects WC spool and stainless steel valve rod by hot adhesion.
Background technology
At present, the fluid operating pressure of the Heisui River system in large-scale Coal-water Slurry Pressurized Gasification Unit is high, the high easily fouling of medium content of ashes, there is water, vapour, particle three-phase flow, WC spool usually comes off, and stops up runner, is in Coal Chemical Industry gasification installation, to go wrong and the point occurred frequently of the fault frequency, seriously perplex the normal operation of black water regulating valve always, also restricting the normal operation of gasification installation simultaneously.
The Heisui River washing adjusting operating mode that the outlet of 6.5MPa coal water slurry pressurized gasifier quench chamber and carbon are washed tower outlet is that upstream pressure is respectively 6.73MPa, 6.36MPa, and pressure reduction is respectively 1.62MPa, 1.25MPa, and Heisui River temperature is 249 DEG C.Although there is three-phase flow, because WC spool hardness is more than HRC90, wearability is good, so spool only otherwise come off, its life cycle is at least more than 2 years.But due to coming off of spool, cause runner blocked, spool is subject to vibrations, collision and damages, and has to start bypass manual operation, and quality of regulation worsens rapidly.
Tungsten carbide trim goods are products of applied powder metallurgy technology, while manufacturing spool valve seat product, first need by shaping dies, the WC powder body material configuring to be pressed into by mould the shape of design in powder metallurgy mode, then carry out sintering.Tungsten carbide valve core material hardness is very high, and its hardness is about HRC90, cannot be connected by the mode of molten solder with stainless steel valve rod, and the mode that abroad control valve company generally adopts screw thread to add pin at present connects.Its method is that spool is held with valve rod and linked with screw rod, then adds pin and fix.Because Heisui River operating mode exists the reasons such as three-phase flow, pipe vibration and pressure reduction are large, WC spool very easily comes off, the new product trim of general offshore company, and moving two weeks left and right spools will come off.
Summary of the invention
The object of this invention is to provide a kind of method that connects WC spool and stainless steel valve rod by hot adhesion, solved the extremely caducous problem of WC spool in the trim of existing black water regulating valve.
The technical solution adopted in the present invention is, a kind of method that connects WC spool and stainless steel valve rod by hot adhesion is implemented according to the following steps,
Step 1, checks whether WC spool and stainless steel valve rod junction have annular space, are considered as without annular space as annular space is less than or equal to 0.15 millimeter, are greater than 0.15 millimeter and have been considered as annular space.
If without annular space, process one side V-ring gap in stainless steel valve rod one side of WC spool and stainless steel valve rod contact site, and remove surperficial burr;
Step 3, the trim of processing through step 2 is placed on stable support, and avoid support vibrations, WC spool and stainless steel valve rod junction are slowly carried out to preheating with the flame envelope of oxy-acetylene flame, flame must cover WC spool, heat while rotate WC spool and evenly heat up, until WC spool is kermesinus, stainless steel valve rod is salmon pink;
Step 4, adopts oxy-acetylene welding to implement heat bonding at annular space place to the trim through step 3 preheating, after scolder fills up annular space fully, uniformly, is wrapped trim insulation rapidly with asbestos, after naturally cooling to room temperature, remove asbestos quilt, and grind off surperficial slag.
Feature of the present invention is also,
In step 1, the degree of depth of one side V-ring gap is 3 millimeters, and width is 0.5 millimeter.
In step 3, be 10-15 minute preheating time.
If check in step 1, there is annular space WC spool and stainless steel valve rod junction, and the scolder in 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 heat bonding, HL103 copper zinc solder being dried 1 hour at the temperature of 150 DEG C.
When step 4 is carried out heat bonding, if scolder is HL103 copper zinc solder, flux is selected CJ101 stainless steel and heat resisting steel Gas welding flux; If scolder is HL322 cadmium-free silver-base scolder, flux is selected the special silver soldering flux of QJ103.
If check in step 1, WC spool and stainless steel valve rod junction are without annular space, and the scolder in step 4 is HL322 cadmium-free silver-base scolder.
Wherein the diameter of HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before heat bonding, HL322 cadmium-free silver-base scolder being dried 1 hour at the temperature of 150 DEG C.
When step 4 is carried out heat bonding, flux is selected the special silver soldering flux of QJ103.
The invention has the beneficial effects as follows, by hot adhesion, script is connected by screw rod, the fixing trim of pin further connects, guaranteed can not affect the normal use of black water regulating valve because WC spool comes off at coal gasification apparatus black water regulating valve within an overhaul life, has effectively safeguarded the long-period stable operation of gasification Heisui River regulating system.
Brief description of the drawings
Fig. 1 is the structural representation of trim.
In figure, 1. stainless steel valve rod, 2.WC spool.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the present invention is described in detail.
The invention provides a kind of method that connects WC spool and stainless steel valve rod by hot adhesion, implement according to the following steps,
Step 1, to the trim that WC spool 2 is connected with stainless steel valve rod 1, laterally pin is fixed being checked by screw rod, as shown in Figure 1, check whether WC spool 2 and stainless steel valve rod 1 junction have annular space, as being less than or equal to 0.15 millimeter, annular space is considered as without annular space, be greater than 0.15 millimeter and be considered as annular space, if without annular space, process one side V-ring gap in WC spool 2 and stainless steel valve rod 1 one sides of stainless steel valve rod 1 contact site, the degree of depth of one side V-ring gap is 3 millimeters, width is 0.5 millimeter, and removes surperficial burr;
Step 3, the trim of processing through step 2 is placed on stable support, and avoid support vibrations, preheating is slowly carried out to the flame envelope of oxy-acetylene flame in WC spool 2 and stainless steel valve rod 1 junction, flame must cover WC spool 2, heats while rotates WC spool 2 and evenly heat up, until WC spool 2 is kermesinus, stainless steel valve rod 1 is salmon pink, and whole preheating duration must be 10-15 minute;
Step 4, adopts oxy-acetylene welding to implement heat bonding at annular space place to the trim through step 3 preheating, after scolder fills up annular space fully, uniformly, is wrapped trim insulation rapidly with asbestos, after naturally cooling to room temperature, remove asbestos quilt, and grind off surperficial slag.
Wherein, if check in step 1, there is annular space WC spool 2 and stainless steel valve rod 1 junction, annular space is greater than 0.20 millimeter, can process one side V-ring gap, the scolder in step 4 is HL103 copper zinc solder or HL322 cadmium-free silver-base scolder, if scolder is HL103 copper zinc solder, flux is selected CJ101 stainless steel and heat resisting steel Gas welding flux; If scolder is HL322 cadmium-free silver-base scolder, flux is selected the special silver soldering flux of QJ103, and the diameter of HL103 copper zinc solder is 2～2.5 millimeters, carries out before heat bonding, HL103 copper zinc solder being dried 1 hour at the temperature of 150 DEG C.
If check in step 1, WC spool 2 and stainless steel valve rod 1 junction are without annular space, the scolder in step 4 is HL322 cadmium-free silver-base scolder, after this scolder melts, mobility is better, while carrying out heat bonding, flux is selected the special silver soldering flux of QJ103, the diameter of HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before heat bonding, HL322 cadmium-free silver-base scolder being dried 1 hour at the temperature of 150 DEG C.
Method of the present invention has solved regulating system long curved neck venturi angle valve WC spool in Heisui River in Coal-water Slurry Pressurized Gasification Unit and in actual moving process, has held caducous problem, guarantee the quality of regulation of this operating mode, guarantee the service life of expensive special material trim, guaranteed can not affect black water regulating valve because WC spool comes off within an overhaul life of coal gasification apparatus (a year and a half), grow the normal use of curved neck venturi angle valve, 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, 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 De Laisai Masoneilan company, specification is 2 "～6 ", ANSI900Lb, the every cover of its WC trim price different size be 14 to 200,000 yuans not etc., a set of trim at least should use 1 year under normal circumstances, but owing to there being the spool problem that comes off, next month of a set of trim most cases is less than just having come off.Adopt method of the present invention, WC trim adopts heat bonding processing, and a set of trim can use can not come off for one to two year.Save the conservative estimation of a set of trim according to the curved neck venturi of annual director angle valve, only first phase, the second stage of device Heisui River valve trim are saved 210 to 3,000,000 yuan in 1 year.Get off for many years, beneficial effect is very considerable.
Claims (9)
1. a method that connects WC spool and stainless steel valve rod by hot adhesion, is characterized in that, implements according to the following steps,
Step 1, checks whether WC spool (2) and stainless steel valve rod (1) junction have annular space, are considered as without annular space as annular space is less than or equal to 0.15 millimeter, are greater than 0.15 millimeter and have been considered as annular space,
If without annular space, process one side V-ring gap in WC spool (2) and stainless steel valve rod (1) one side of stainless steel valve rod (1) contact site, and remove surperficial burr;
Step 2, to WC spool (2) and the cleaning of stainless steel valve rod (1) junction and degreasing, then at room temperature air-dry with pure carbon tetrachloride;
Step 3, the trim of processing through step 2 is placed on stable support, and avoid support vibrations, preheating is slowly carried out to the flame envelope of oxy-acetylene flame in WC spool (2) and stainless steel valve rod (1) junction, flame must cover WC spool (2), heat while rotate WC spool (2) and evenly heat up, until WC spool (2) is kermesinus, stainless steel valve rod (1) is salmon pink;
Step 4, adopts oxy-acetylene welding to implement heat bonding at annular space place to the trim through step 3 preheating, after scolder fills up annular space fully, uniformly, is wrapped trim insulation rapidly with asbestos, after naturally cooling to room temperature, remove asbestos quilt, and grind off surperficial slag.
2. method according to claim 1, is characterized in that, in described step 1, the degree of depth of one side V-ring gap is 3 millimeters, and width is 0.5 millimeter.
3. method according to claim 1, is characterized in that, in step 3, be 10-15 minute preheating time.
4. method according to claim 1, is characterized in that, if check in step 1, there is annular space WC spool (2) and stainless steel valve rod (1) junction, and the scolder in 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 described HL103 copper zinc solder is 2～2.5 millimeters, carries out before heat bonding, HL103 copper zinc solder being dried 1 hour at the temperature of 150 DEG C.
6. method according to claim 4, is characterized in that, when step 4 is carried out heat bonding, if scolder is HL103 copper zinc solder, flux is selected CJ101 stainless steel and heat resisting steel Gas welding flux; If scolder is HL322 cadmium-free silver-base scolder, flux is selected the special silver soldering flux of QJ103.
7. method according to claim 1, is characterized in that, if check in step 1, WC spool (2) and stainless steel valve rod (1) junction are without annular space, and the scolder in step 4 is HL322 cadmium-free silver-base scolder.
8. method according to claim 7, is characterized in that, the diameter of described HL322 cadmium-free silver-base scolder is 2～2.5 millimeters, carries out before heat bonding, HL322 cadmium-free silver-base scolder being dried 1 hour at the temperature of 150 DEG C.
9. method according to claim 7, is characterized in that, when step 4 is carried out heat bonding, flux is selected the special silver soldering flux of QJ103.
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 |
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| Application Number | Priority Date | Filing Date | Title |
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| 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 |
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| CN102728918A CN102728918A (en) | 2012-10-17 |
| CN102728918B true CN102728918B (en) | 2014-06-25 |
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| CN105364244B (en) * | 2015-12-21 | 2017-10-27 | 株洲通达合金股份有限公司 | A kind of welding method of hard alloy and stainless steel compound bar pin |
| 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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| 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 |
| 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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| 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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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 |