NEEDLE VALVE
PURPOSE:To provide a needle valve which has the same degree or more of anti-corrosiveness and wear resistance against earth and sand as stainless steel in an environment involving a weak acid water by applying a composite weld fillet covering layer on a parent material of austenite series stainless...
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| creator | OKA KOJI BANDAI TOSHIHIKO USAMI KENICHI ASHIZAWA KOJI |
| description | PURPOSE:To provide a needle valve which has the same degree or more of anti-corrosiveness and wear resistance against earth and sand as stainless steel in an environment involving a weak acid water by applying a composite weld fillet covering layer on a parent material of austenite series stainless steel to form a nozzle and a needle. CONSTITUTION:A needle valve to be installed in a vertical shaft Pelton hydraulic wheel for hydraulic power generation is equipped with a needle 4 and nozzle 3 formed from an Fe-based base material of ferrite/pearlite series or martensite series, and an anti-abrasive covering layer is applied to the mating surfaces of the needle 4 and nozzle 3 to touch the fluid 15. The covering layer consists of a composite weld fillet covering layer at least on the mating surfaces 14 as a mixture powder containing 3-6wt.% silicon carbide SiC as ceramics of carbide series and an austenite type alloy and also an intermediate fillet layer as a buffer containing powder of austenite alloy having a greater coefficient of thermal expansion than the base material and a composite weld fillet covering between the mentioned composite weld fillet covering layer and base material. |
| format | Patent |
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CONSTITUTION:A needle valve to be installed in a vertical shaft Pelton hydraulic wheel for hydraulic power generation is equipped with a needle 4 and nozzle 3 formed from an Fe-based base material of ferrite/pearlite series or martensite series, and an anti-abrasive covering layer is applied to the mating surfaces of the needle 4 and nozzle 3 to touch the fluid 15. The covering layer consists of a composite weld fillet covering layer at least on the mating surfaces 14 as a mixture powder containing 3-6wt.% silicon carbide SiC as ceramics of carbide series and an austenite type alloy and also an intermediate fillet layer as a buffer containing powder of austenite alloy having a greater coefficient of thermal expansion than the base material and a composite weld fillet covering between the mentioned composite weld fillet covering layer and base material.</description><edition>6</edition><language>eng</language><subject>ACTUATING-FLOATS ; BLASTING ; COCKS ; DEVICES FOR VENTING OR AERATING ; ENGINEERING ELEMENTS AND UNITS ; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS ; HEATING ; LIGHTING ; MACHINES OR ENGINES FOR LIQUIDS ; MECHANICAL ENGINEERING ; OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR ; PRODUCING MECHANICAL POWER ; TAPS ; THERMAL INSULATION IN GENERAL ; VALVES ; WEAPONS ; WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</subject><creationdate>1995</creationdate><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19950919&DB=EPODOC&CC=JP&NR=H07243539A$$EHTML$$P50$$Gepo$$Hfree_for_read</linktohtml><link.rule.ids>230,308,780,885,25562,76317</link.rule.ids><linktorsrc>$$Uhttps://worldwide.espacenet.com/publicationDetails/biblio?FT=D&date=19950919&DB=EPODOC&CC=JP&NR=H07243539A$$EView_record_in_European_Patent_Office$$FView_record_in_$$GEuropean_Patent_Office$$Hfree_for_read</linktorsrc></links><search><creatorcontrib>OKA KOJI</creatorcontrib><creatorcontrib>BANDAI TOSHIHIKO</creatorcontrib><creatorcontrib>USAMI KENICHI</creatorcontrib><creatorcontrib>ASHIZAWA KOJI</creatorcontrib><title>NEEDLE VALVE</title><description>PURPOSE:To provide a needle valve which has the same degree or more of anti-corrosiveness and wear resistance against earth and sand as stainless steel in an environment involving a weak acid water by applying a composite weld fillet covering layer on a parent material of austenite series stainless steel to form a nozzle and a needle. CONSTITUTION:A needle valve to be installed in a vertical shaft Pelton hydraulic wheel for hydraulic power generation is equipped with a needle 4 and nozzle 3 formed from an Fe-based base material of ferrite/pearlite series or martensite series, and an anti-abrasive covering layer is applied to the mating surfaces of the needle 4 and nozzle 3 to touch the fluid 15. The covering layer consists of a composite weld fillet covering layer at least on the mating surfaces 14 as a mixture powder containing 3-6wt.% silicon carbide SiC as ceramics of carbide series and an austenite type alloy and also an intermediate fillet layer as a buffer containing powder of austenite alloy having a greater coefficient of thermal expansion than the base material and a composite weld fillet covering between the mentioned composite weld fillet covering layer and base material.</description><subject>ACTUATING-FLOATS</subject><subject>BLASTING</subject><subject>COCKS</subject><subject>DEVICES FOR VENTING OR AERATING</subject><subject>ENGINEERING ELEMENTS AND UNITS</subject><subject>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</subject><subject>HEATING</subject><subject>LIGHTING</subject><subject>MACHINES OR ENGINES FOR LIQUIDS</subject><subject>MECHANICAL ENGINEERING</subject><subject>OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR</subject><subject>PRODUCING MECHANICAL POWER</subject><subject>TAPS</subject><subject>THERMAL INSULATION IN GENERAL</subject><subject>VALVES</subject><subject>WEAPONS</subject><subject>WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</subject><fulltext>true</fulltext><rsrctype>patent</rsrctype><creationdate>1995</creationdate><recordtype>patent</recordtype><sourceid>EVB</sourceid><recordid>eNrjZODxc3V18XFVCHP0CXPlYWBNS8wpTuWF0twMim6uIc4euqkF-fGpxQWJyal5qSXxXgEeBuZGJsamxpaOxsSoAQCKghyC</recordid><startdate>19950919</startdate><enddate>19950919</enddate><creator>OKA KOJI</creator><creator>BANDAI TOSHIHIKO</creator><creator>USAMI KENICHI</creator><creator>ASHIZAWA KOJI</creator><scope>EVB</scope></search><sort><creationdate>19950919</creationdate><title>NEEDLE VALVE</title><author>OKA KOJI ; BANDAI TOSHIHIKO ; USAMI KENICHI ; ASHIZAWA KOJI</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-epo_espacenet_JPH07243539A3</frbrgroupid><rsrctype>patents</rsrctype><prefilter>patents</prefilter><language>eng</language><creationdate>1995</creationdate><topic>ACTUATING-FLOATS</topic><topic>BLASTING</topic><topic>COCKS</topic><topic>DEVICES FOR VENTING OR AERATING</topic><topic>ENGINEERING ELEMENTS AND UNITS</topic><topic>GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS</topic><topic>HEATING</topic><topic>LIGHTING</topic><topic>MACHINES OR ENGINES FOR LIQUIDS</topic><topic>MECHANICAL ENGINEERING</topic><topic>OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR</topic><topic>PRODUCING MECHANICAL POWER</topic><topic>TAPS</topic><topic>THERMAL INSULATION IN GENERAL</topic><topic>VALVES</topic><topic>WEAPONS</topic><topic>WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS</topic><toplevel>online_resources</toplevel><creatorcontrib>OKA KOJI</creatorcontrib><creatorcontrib>BANDAI TOSHIHIKO</creatorcontrib><creatorcontrib>USAMI KENICHI</creatorcontrib><creatorcontrib>ASHIZAWA KOJI</creatorcontrib><collection>esp@cenet</collection></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext_linktorsrc</fulltext></delivery><addata><au>OKA KOJI</au><au>BANDAI TOSHIHIKO</au><au>USAMI KENICHI</au><au>ASHIZAWA KOJI</au><format>patent</format><genre>patent</genre><ristype>GEN</ristype><title>NEEDLE VALVE</title><date>1995-09-19</date><risdate>1995</risdate><abstract>PURPOSE:To provide a needle valve which has the same degree or more of anti-corrosiveness and wear resistance against earth and sand as stainless steel in an environment involving a weak acid water by applying a composite weld fillet covering layer on a parent material of austenite series stainless steel to form a nozzle and a needle. CONSTITUTION:A needle valve to be installed in a vertical shaft Pelton hydraulic wheel for hydraulic power generation is equipped with a needle 4 and nozzle 3 formed from an Fe-based base material of ferrite/pearlite series or martensite series, and an anti-abrasive covering layer is applied to the mating surfaces of the needle 4 and nozzle 3 to touch the fluid 15. The covering layer consists of a composite weld fillet covering layer at least on the mating surfaces 14 as a mixture powder containing 3-6wt.% silicon carbide SiC as ceramics of carbide series and an austenite type alloy and also an intermediate fillet layer as a buffer containing powder of austenite alloy having a greater coefficient of thermal expansion than the base material and a composite weld fillet covering between the mentioned composite weld fillet covering layer and base material.</abstract><edition>6</edition><oa>free_for_read</oa></addata></record> |
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| language | eng |
| recordid | cdi_epo_espacenet_JPH07243539A |
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| subjects | ACTUATING-FLOATS BLASTING COCKS DEVICES FOR VENTING OR AERATING ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVEFUNCTIONING OF MACHINES OR INSTALLATIONS HEATING LIGHTING MACHINES OR ENGINES FOR LIQUIDS MECHANICAL ENGINEERING OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR PRODUCING MECHANICAL POWER TAPS THERMAL INSULATION IN GENERAL VALVES WEAPONS WIND, SPRING WEIGHT AND MISCELLANEOUS MOTORS |
| title | NEEDLE VALVE |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2025-01-09T10%3A53%3A12IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-epo_EVB&rft_val_fmt=info:ofi/fmt:kev:mtx:patent&rft.genre=patent&rft.au=OKA%20KOJI&rft.date=1995-09-19&rft_id=info:doi/&rft_dat=%3Cepo_EVB%3EJPH07243539A%3C/epo_EVB%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_id=info:pmid/&rfr_iscdi=true |