Ing gate valve metung yang mas karaniwan a pangkabilugan a balbula, malawak yang gagamitan, keraklan magagamit ya keng water conservancy, metallurgy ampo aliwa pang industriya, ing kayang malawak a performance mekilala ya keng palengki, TWS keng kalidad ampo teknikal a superbisyon ampo pamagsuri keng obra kilub ning dakal a banua, dagdag pa keng pamangilala kareng gate valve atin lang metung a pamanyaliksik, pero pati na ing pamangamit kareng gate valve, at aliwa pang problema masipag a pamanyaliksik.
Agpang kareng miyayaliwang porma da reng gate valves, deng gate valves malyari lang miyabe kareng adwang kategorya: wedge type ampo parallel type.
Ing gate plate ning wedge gate valve wedge-shaped ya, at ing sealing surface makahilig ya keng sentru ning channel, ampo ing wedge pilatan ning gate plate ampo ing valve seat magagamit ya para akwa ing sealing (closing). Ing wedge plate malyari yang metung a pasbul o dobli a pasbul.
Deng sealing surfaces ning parallel gate valve parallel la keng metung at metung ampo perpendicular la keng sentru ning channel, na makadake la keng adwang uri: ating ampo alang opening mechanism. Atin yang double ram a maki bracing mechanism, nung ing ram baba ya, ing wedge da reng adwang parallel ram maka-prop ya keng valve seat kapamilatan ning inclined plane, ing flow channel maputol ya, nung ing ram tatas ya at mibuklat ya, ing wedge mikawani ya keng ram mating surface, ing ram tatas ya keng metung a katas, at ing wedge tatalan ne ning boss keng ram. Potang ing ram mag slide ya keng valve seat kareng adwang parallel valve seat surfaces, ing pressure ning fluid gagamitan de para i-press ing ram keng valve body keng outlet side ning valve para i-seal ing fluid.
Agpang keng miyayaliwang kimut ning valve stem nung mibuklat ya at makasara ya ing gate, deng gate valves makadake la keng adwang kategorya: rising stem gate valves ampo concealed stem gate valves. Ing valve stem ampo ing gate ning rising stem gate valve tatas la ampo bababa la keng pareung oras nung makabuklat o makasara; nung ing makasalikut a stem gate valve mibuklat ya o makasara ya, ing valve stem mag-rotate ya, at ing pamagtas at pamagbaba ning valve stem e ya mayayakit, at ing valve plate tatas ya o babagsak ya. Ing advantage ning rising stem gate valve yapin ing ing channel opening height malyari yang abalu keng rising height ning valve stem, pero ing occupied height malyari yang paiklian. Nung makayarap ya keng handwheel o hawakan, ibalik me ing handwheel o hawakan pa-clockwise para isara me ing balbula.
2. Okasyun ampo prinsipyung pamili para kareng gate valves
01. Flat gate valve
okasyun para kareng flat gate valves:
(1) Oil ampo natural gas pipelines. Deng flat gate valves a ating diversion holes manyaman la para keng pamaglinis kareng pipeline.
(2) Pipelines ampo gamit para keng refined oil.
(3) Oil ampo natural gas production outlets.
(4) Pipelines a ating makabitin a particle media.
(5) City gas transmission pipelines.
(6) Proyektung suplay ning danum.
Prinsipyu ning pamili ning flat gate valve:
(1) Para kareng oil ampo natural gas transmission pipelines, mapili la reng plate gate valves a ating single o double gates. nung kailangan meng linisan ing pipeline, mamili kang open-rod flat gate valve a ating metung a ram ampo metung a diversion hole.
(2) Para keng transport pipeline ampo ing gamit keng pamitipun ning refined oil, ing flat gate valve a ating single o double gate a alang diversion hole ing mapili.
(3) Para keng exploitation port device ning oil ampo natural gas, ing flat gate valve a maki single o double gate plate a maki dark rod floating valve seat ampo diversion hole ing mepili.
(4) Para kareng pipelines a ating suspended particle media, mapili la reng flat gate valves a hugis kutsilyu.
(5) Para kareng urban gas transmission pipelines, metung a gate o double gate plate soft sealing open rod flat gate valve ing mapili.
(6) Para kareng proyektung suplay ning danum, ing single gate o double gate valve a alang diversion hole open rod flat gate valve ing mapili.
02. Wedge gate valve
Wedge gate valve application occasions: kareng miyayaliwang uri da reng valve, ing gate valve ing peka maralas dang gagamitan, keraklan para yamu keng full open o full closed, e ya malyaring gamitan para keng adjustment ampo throttling.
Deng wedge gate valves keraklan magagamit la kareng lugal nung nukarin alang mahigpit a requirements para keng external dimensions ning valve, ampo mas masikan ing pamangamit. Alimbawa, ing obrang medium a matas a temperatura ampo matas a pressure mangailangan yang makasara a bage na makasara ya keng makabang panaun.
Keraklan, ing pamangamit king matas a pressure, matas a pressure cut-off (maragul a pamiyaliwa ning presyur), mababang pressure cut-off (malating pamiyaliwa ning presyur), mababang ingay, cavitation ampong vaporization, matas a temperatura medium, mababang temperatura (cryogen), wedge gate valve ing rekomendadu. Alimbawa, maralas yang magagamit keng electric power industry, petroleum smelting, petrochemical industry, offshore oil, tap water engineering ampo sewage treatment engineering keng urban construction, ampo chemical industry.
Prinsipyu ning pamili:
(1) Kailangan para keng katangian ning likidu ning balbula. Deng gate valves mepili la para kareng kundisyun ning obra na ating malating flow resistance, masikan a flow capacity, masanting a flow characteristics ampo mahigpit a sealing requirements.
(2) Matas a temperatura ampo matas a presyur a medium. Antimo ing matas a presyon ning singaw, matas a temperatura at matas a presyon ning langis.
(3) mababang temperatura (cryogen) medium. Antimo ing liquid ammonia, liquid hydrogen, liquid oxygen ampo reng aliwang media.
(4) Mababa ing presyur at maragul ing diametru. kalupa da reng proyektung danum keng gripu, proyektung pamaglinis keng alkantarilya.
(5) City gas transmission pipelines.
(6) Proyektung suplay ning danum.
Ing prinsipyu ning pamili ning flat gate valve:
(1) Para kareng oil ampo natural gas transmission pipelines, mapili la reng plate gate valves a ating single o double gates. nung kailangan meng linisan ing pipeline, mamili kang open-rod flat gate valve a ating metung a ram ampo metung a diversion hole.
(2) Para keng transport pipeline ampo ing gamit keng pamitipun ning refined oil, ing flat gate valve a ating single o double gate a alang diversion hole ing mapili.
(3) Para keng exploitation port device ning oil ampo natural gas, ing flat gate valve a maki single o double gate plate a maki dark rod floating valve seat ampo diversion hole ing mepili.
(4) Para kareng pipelines a ating suspended particle media, mapili la reng flat gate valves a hugis kutsilyu.
(5) Para kareng urban gas transmission pipelines, metung a gate o double gate plate soft sealing open rod flat gate valve ing mapili.
(6) Para kareng proyektung suplay ning danum, ing single gate o double gate valve a alang diversion hole open rod flat gate valve ing mapili.
02. Wedge gate valve
Wedge gate valve application occasions: kareng miyayaliwang uri da reng valve, ing gate valve ing peka maralas dang gagamitan, keraklan para yamu keng full open o full closed, e ya malyaring gamitan para keng adjustment ampo throttling.
Deng wedge gate valves keraklan magagamit la kareng lugal nung nukarin alang mahigpit a requirements para keng external dimensions ning valve, ampo mas masikan ing pamangamit. Alimbawa, ing obrang medium a matas a temperatura ampo matas a pressure mangailangan yang makasara a bage na makasara ya keng makabang panaun.
Keraklan, ing pamangamit king matas a pressure, matas a pressure cut-off (maragul a pamiyaliwa ning presyur), mababang pressure cut-off (malating pamiyaliwa ning presyur), mababang ingay, cavitation ampong vaporization, matas a temperatura medium, mababang temperatura (cryogen), wedge gate valve ing rekomendadu. Alimbawa, maralas yang magagamit keng electric power industry, petroleum smelting, petrochemical industry, offshore oil, tap water engineering ampo sewage treatment engineering keng urban construction, ampo chemical industry.
Prinsipyu ning pamili:
(1) Kailangan para keng katangian ning likidu ning balbula. Deng gate valves mepili la para kareng kundisyun ning obra na ating malating flow resistance, masikan a flow capacity, masanting a flow characteristics ampo mahigpit a sealing requirements.
(2) Matas a temperatura ampo matas a presyur a medium. Antimo ing matas a presyon ning singaw, matas a temperatura at matas a presyon ning langis.
(3) mababang temperatura (cryogen) medium. Antimo ing liquid ammonia, liquid hydrogen, liquid oxygen ampo reng aliwang media.
(4) Mababa ing presyur at maragul ing diametru. kalupa da reng proyektung danum keng gripu, proyektung pamaglinis keng alkantarilya.
(5) Lugar ning pamag-install: nung limitadu ya ing katas ning pamag-install, ing dark rod wedge gate valve ing mapili; nung ali ya limitadu ing katas, ing open rod wedge gate valve ing mapili.
(6) Nung malyari yang lubus a mibuklat o ganap a isara, at e malyaring gamitan para king pamag-adjust at pamag-throttle, ing wedge gate valve malyari yang mamili.
3. Karaniwan a kapintasan ampo pamaningat
01. Karaniwan a kasalanan ampo sangkan da reng gate valves
Kaybat nang megamit ing gate valve, deng makatuking problema maralas lang malilyari pauli ning katamtaman a temperatura, pressure, corrosion ampo ing relatibung kimut ning balang contact.
(1) Leakage: Atin yang adwang uri, ing external leakage ampo ing internal leakage. Ing leakage keng kilwal ning valve awsan deng leakage, at leakage karaniwan ya kareng stuffing boxes ampo kareng flange connections.
Ing sangkan ning pamagtagas ning stuffing box: ing uri o kalidad ning packing e ya makayagpang kareng requirements; Aging packing o stem wear; Maluwag ing packing gland Abrasion keng babo ning stem.
Ing sangkan ning pamagtagas ning flange connection: ing materyal o sukad ning gasket e ya makayagpang kareng requirements; E masanting a kalidad ning pamagprosesu ning flange sealing surface; e ustu ing pamaghigpit kareng connecting bolts; Ing piping ali ya masalese maka-configure, inya sa’t mika sobrang karagdagang karga kareng joints.
Sangkan ning internal leakage ning valve: Ing leakage a sangkan ning maluwag a pamagsara ning valve metung yang internal leakage, a sangkan ning pangasira ning sealing surface ning valve o ing maluwag a yamut ning sealing ring.
(1) Ing corrosion maralas yang sangkan ning corrosion ning sealing surface ning valve body, valve cover, valve stem ampo flange. Ing corrosion keraklan uli ning aksyon ning medium, pero pati na ing epektu ning pamaglual da reng ions ibat keng filler ampo gasket.
(2) Abrasion: local surface brushing o peeling phenomenon na malilyari nung ing ram ampo ing valve seat atyu la keng relative motion lalam ning metung a contact specific pressure.
02. Pamamintu ninggate valves
(1) Pamag-ayus king panlual a pangatagas ning balbula
Potang pindutan me ing packing, ing gland bolt dapat symmetrically ya para aiwasan ing gland tilting at maglakwan yang gap para keng compression. Kabang pindutan me ing packing, ing valve stem dapat yang i-rotate para gawang pare-pareu ing packing keng paligid ning valve stem, at e ya masyadung mate ing pressure, para e ya makaapektu keng pamag-rotate ning valve stem, dagdagan ing wear ning packing, ampo mabawas ing service life. Ing babo ning valve stem abrasive ya, inya sa't ing medium madali yang tumagas, at dapat yang iprosesu para mawala la reng peklat keng babo ning valve stem bayu gamitan.
Para keng leakage ning flange connection, nung masira ya ing gasket, dapat yang palitan; nung e ya mepili masalese ing materyales ning gasket, ing materyales a makatupad kareng requirements ning pamangamit dapat yang mapili; nung ing kalidad ning pamagprosesu ning flange sealing surface e ya masanting, ing flange sealing surface kailangan yang ilako at iprosesu pasibayu anggang maging qualified ya.
Dagdag pa, ing masaleseng pamaghigpit kareng flange bolts, ing masaleseng pamag-configure kareng pipe, ampo ing pamag-iwas kareng sobrang karagdagang karga keng flange connection ila ngan deng makasaup para aiwasan ing leakage keng flange joint.
(2) Pamag-ayus keng leakage kilub ning valve
Ing pamag-ayus kareng internal leaks para mawala ing pangasira ning sealing surface ampo ing loose sealing keng root (nung ing sealing ring maka-press ya keng valve plate o seat gamit ing thread). nung ing sealing surface diretsu yang miprosesu keng valve body ampo keng valve plate, ala yang problema ing loose root ampo leakage.
Nung ing sealing surface mesira ya, at ing sealing surface mebuu ya keng sealing ring, ing lumang ring dapat yang ilako at ing bayung sealing ring dapat yang isadia; nung ing sealing surface me machine ya diretsu keng valve body, ing mesira a sealing surface dapat yang ilako muna, at kaybat ing bayung sealing ring o machined surface dapat yang i ground para maging bayung sealing surface. nung deng gasgas, bumps, crushes, dents ampo aliwa pang depektu ning sealing surface mas ditak la pa keng 0.05mm, malyari lang ilako kapamilatan ning pamaggiling.
Potang ing seal ring maka-press ya at maka-fix ya, ing PTFE tape o maputing makapal a pintura malyari yang ibili keng lalam ning valve seat o seal ring groove, at kaybat i-press ya keng seal para ing yamut ning seal ring mapuno ya; Nung ing seal maka-thread ya, ing PTFE tape o maputing pintura dapat yang ibili pilatan da reng sinulad para aiwasan ing pamag-leak ning likidu pilatan da reng sinulad.
(3) Pamag-ayus ningbalbulakaagnasan
Keraklan, ing katawan ning balbula ampo ing bonnet pare-pareu lang maka-corrod, kabang ing stem ning balbula maralas yang maka-pit. Potang mag-repair, dapat lang ilako deng produktung maka-corrosion, at ing valve stem a maki pitting pits dapat yang iprosesu keng lathe para mawala ing depression, at ing packing a maki slow-release agent dapat yang gamitan bilang kapalit, o ing packing dapat yang linisan gamit ing distilled water para ilako la reng ions na atin corrosive effect keng valve stem keng packing.
(4) Pamag-ayus keng abrasion keng sealing surface
Ing pamangamit ningbalbula, ing sealing surface dapat yang aiwasan ing abrasion angga na king malyari, at ing torque dapat e ya masyadung maragul nung makasara ya ing valve. nung ing sealing surface abrasive ya, malyari yang ilako kapamilatan ning pamaggiling.
Kapat, ing pamangilala kareng gate valves
keng kasalukuyan a kapaligiran ning palengki ampo kareng pamangailangan da reng gagamit, deng iron gate valves ila reng maragul a dake. Bilang metung a inspector ning kalidad ning produktu, bukud keng pamilyar tamu keng pamagsuri keng kalidad ning produktu, kailangan mu namang atin tamung masanting a pamanintindi keng mismung produktu.
01. Ing testing basis da reng iron gate valves
Ing pamagsuri keng iron gate valve makabasi ya keng national standard GB/T12232-2005 "General Valve Flange Connection Iron Gate Valve".
02. Inspection items of iron gate valves
Kayabe la reng: marka, malating kapal ning pader, pressure test, shell test, atbp., nung nukarin ing kapal ning pader, pressure, shell test metung yang kailangang inspeksyun, pero metung ya namang susi, nung atin yang e makayagpang a bage, malyari yang diretsung atulan bilang e kwalipikadung produktu.
King makuyad a salita, ing pamagsuri king kalidad ning produktu metung yang maulaga nang dake ning mabilug a pamagsuri king produktu, ing kayang importansya malino ya king sarili, bilang metung a front-line inspection staff, kailangan tamung patuloy a pasikanan ing karelang sariling kalidad, e mu para gawang masanting a obra king pamagsuri king produktu, nune para mika pamanintindi tamu king pamagsuri kareng produktu, ban mas masanting ing pamagsuri kareng produktu, ban mas masanting ing pamagsuri king pamagsuri.
Tianjin Tanggu Water-Seal Valve Co.,ltdkeraklan magproduce lang matatag a makaluklukbalbula ning parul,gate valve,Y-strainer, balancing valve, check valve, balancing valve, back flow preventer etc.
Oras ning pamagpost: Dec-26-2024
