Amaphuzu abalulekile wokukhetha ama-valve
1. Cacisa inhloso yevalvu emshinini noma ocingweni
Thola izimo zokusebenza ze-valve: uhlobo lwendawo esebenzayo, ingcindezi yokusebenza, izinga lokushisa lokusebenza kanye nendlela yokulawula yokusebenza, njll.
2. Khetha kahle uhlobo lwevalvu
Ukukhetha okulungile kohlobo lwevalvu kusekelwe ekubambeni komklami ngokugcwele kwayo yonke inqubo yokukhiqiza nezimo zokusebenza njengemfuneko. Lapho ekhetha uhlobo lwevalvu, umklami kufanele aqale abambe izici zesakhiwo nokusebenza kwevalvu ngayinye.
3. Thola ukuxhumana kokuphela kwe-valve
Phakathi koxhumano oluluchungechunge, ukuxhumana kwe-flange, nokuxhumana kokugcina okushiselwe, okubili kokuqala yizona ezisetshenziswa kakhulu. Ama-valve anemicu ama-valve ikakhulukazi anobubanzi obuncane obungaphansi kuka-50mm. Uma ububanzi bukhulu kakhulu, kuyoba nzima kakhulu ukufaka nokuvala uxhumano.
Ama-valve axhunywe nge-flange kulula ukuwafaka nokuwahlakaza, kodwa ayasinda futhi ayabiza kakhulu kunama-valve axhunywe ngesikulufa, ngakho afaneleka ekuxhumekeni kwamapayipi obubanzi obuhlukahlukene nokucindezela.
Uxhumano lwe-welding lufanele izimo zomthwalo osindayo futhi luthembeke kakhulu kunokuxhumeka kwe-flange. Kodwa-ke, kunzima ukuhlukanisa nokufaka kabusha i-valve exhunywe ngokushisela, ngakho-ke ukusetshenziswa kwayo kunqunyelwe ezenzakalweni ezingase zisebenze ngokuthembekile isikhathi eside, noma lapho izimo zokusebenzisa zinzima futhi izinga lokushisa liphezulu.
4. Ukukhethwa kwempahla ye-valve
Lapho ukhetha izinto zegobolondo le-valve, izingxenye zangaphakathi kanye nendawo yokubeka uphawu, ngaphezu kokucabangela izakhiwo ezibonakalayo (izinga lokushisa, ingcindezi) kanye nezakhiwo zamakhemikhali (ukugqwala) kwendawo yokusebenza, ukuhlanzeka kwendawo ephakathi (enezinhlayiya eziqinile noma ezingenazo) kufanele futhi ibanjwe. Ukwengeza, kuyadingeka ukubhekisela emithethweni efanele yezwe kanye nomnyango wabasebenzisi.
Ukukhethwa okulungile nokunengqondo kwezinto ze-valve kungathola impilo yesevisi eyonga kakhulu kanye nokusebenza okungcono kakhulu kwe-valve. Ukulandelana kokukhetha okubalulekile komzimba we-valve yilokhu: insimbi engagqwali ye-iron-carbon steel-stainless, kanye nokulandelana kokukhetha okubalulekile kwendandatho yokuvala ithi: irabha-yethusi-alloy steel-F4.
5. Okunye
Ukwengeza, izinga lokugeleza kanye nezinga lokucindezela koketshezi olugeleza ku-valve kufanele futhi kunqunywe, futhi i-valve efanele kufanele ikhethwe kusetshenziswa ulwazi olukhona (njengamakhathalogi omkhiqizo we-valve, amasampula omkhiqizo we-valve, njll.).
Iziyalezo ezivame ukusetshenziswa zokukhetha ama-valve
1:Imiyalelo yokukhetha yevalvu yesango
Ngokuvamile, ama-valve esango kufanele abe yisinqumo sokuqala. Ngaphandle kokufanelekela umusi, uwoyela kanye neminye imithombo yezindaba, ama-valve esango nawo afaneleka emithonjeni yezindaba equkethe izinto eziqinile ze-granular kanye ne-viscosity ephezulu, futhi afanele ama-valve kuma-venting kanye nezinhlelo eziphansi ze-vacuum. Ukuze uthole imidiya enezinhlayiya eziqinile, umzimba we-valve we-valve yesango kufanele ube nembobo yokuhlanza eyodwa noma ezimbili. Ukuze uthole imidiya yezinga lokushisa eliphansi, ama-valve amasango akhethekile aphansi okushisa kufanele asetshenziswe.
2:Imiyalo yokukhethwa kwevalvu yeglobhu
Ivalvu yokumisa ifanele amapayipi angadingi ukumelana noketshezi oluqinile, okungukuthi, amapayipi noma izisetshenziswa ezinezinga lokushisa eliphezulu kanye nendawo yokucindezela okukhulu ezingacabangi ukulahlekelwa umfutho, futhi afanele amapayipi aphakathi nendawo njengesitimu ane-DN<200mm;
Ama-valve amancane angakhetha ama-valve embulunga, njengama-valve enaliti, ama-instrument valve, ama-sampling valves, ama-valve okulinganisa ukucindezela, njll.;
I-valve yokumisa inokulungiswa kokugeleza noma ukulungiswa kwengcindezi, kodwa ukunemba kokulungiswa akuphakeme, futhi ububanzi bepayipi buncane kakhulu, kungcono ukusebenzisa i-valve yokumisa noma i-throttle valve;
Kumithombo yezindaba enobuthi obukhulu, i-valve yembulunga evaliwe kufanele isetshenziswe; kodwa-ke, i-valve yembulunga akufanele isetshenziselwe imidiya ene-viscosity ephezulu kanye nemidiya equkethe izinhlayiya ezitholakala kalula, futhi akufanele isetshenziswe njenge-valve yokukhipha umoya noma i-vacuum system valve.
3:Imiyalo yokukhetha i-valve yebhola
I-valve yebhola ifanele izinga lokushisa eliphansi, i-high-pressure, ne-high-viscosity media. Ama-valve amaningi ebhola angasetshenziswa emithonjeni yezindaba enezinhlayiya eziqinile ezimisiwe, futhi angasetshenziswa ku-powder kanye nemidiya ye-granular ngokuvumelana nezidingo zezinto ezibonakalayo;
I-valve yebhola egcwele isiteshi ayifanele ukulungiswa kokugeleza, kodwa ifanele izikhathi ezidinga ukuvulwa nokuvala ngokushesha, okulungele ukuvala izingozi eziphuthumayo; ngokuvamile ekusebenzeni kokuvala okuqinile, ukuguga, ukuhamba kwentamo, ukuvulwa okusheshayo nokuvala isenzo, ukunqanyulwa kwengcindezi ephezulu (umehluko omkhulu wengcindezi), Emapayipini anomsindo ophansi, ukuhwamuka, i-torque encane yokusebenza, nokumelana noketshezi oluncane, ama-valve ebhola ayanconywa.
I-valve yebhola ifanele isakhiwo sokukhanya, i-low pressure cut-off, kanye nemidiya edlayo; i-valve yebhola nayo iyi-valve ekahle kakhulu yokushisa okuphansi kanye nemidiya ye-cryogenic. Ngohlelo lwamapayipi kanye nedivaysi yemidiya ephansi yokushisa, i-valve yebhola ephansi yokushisa enebhonethi kufanele ikhethwe;
Lapho ukhetha i-valve yebhola elintantayo, impahla yayo yokuhlala kufanele ithwale umthwalo webhola kanye nendawo yokusebenza. Ama-valve amabhola amakhulu adinga amandla amakhulu ngesikhathi sokusebenza, i-DN≥
Ivalvu yebhola engu-200mm kufanele isebenzise ifomu lokudlulisa igiya lezikelemu; i-valve yebhola engaguquki ifanele ububanzi obukhulu kanye nezikhathi zokucindezela okuphezulu; ngaphezu kwalokho, i-valve yebhola esetshenziselwa inqubo yezinto ezinobuthi kakhulu kanye namapayipi aphakathi nendawo avutha umlilo kufanele abe nesakhiwo esingashi kanye ne-antistatic.
4:imiyalo yokukhetha i-throttle valve
I-valve ye-throttle ifanele izikhathi lapho izinga lokushisa eliphakathi liphansi futhi ingcindezi iphezulu, futhi ifanele izingxenye ezidinga ukulungisa ukugeleza nokucindezela. Ayifanele i-medium ene-viscosity ephezulu futhi equkethe izinhlayiya eziqinile, futhi ayifanele i-valve yokuhlukanisa.
5:Imiyalo yokukhetha ivalvu yeqhude
I-valve yepulaki ifanele izikhathi ezidinga ukuvulwa nokuvala ngokushesha. Ngokuvamile, ayifanele imidiya ye-steam kanye nokushisa okuphezulu, ukushisa okuphansi kanye nemidiya ye-viscosity ephezulu, kanye nemidiya enezinhlayiya ezimisiwe.
6:Imiyalo yokukhetha i-Butterfly valve
I-valve ye-Butterfly ifanele ububanzi obukhulu (okufana ne-DN﹥600mm) nobude besakhiwo esifushane, kanye nezikhathi lapho ukulungiswa kokugeleza kanye nezidingo zokuvula nokuvala ngokushesha zidingeka. Ngokuvamile isetshenziselwa izinga lokushisa ≤
80 ℃, ingcindezi ≤ 1.0MPa amanzi, uwoyela, umoya onomfutho neminye imidiya; ngenxa yokulahlekelwa ukucindezela okukhulu kwamavalvu ovemvane uma kuqhathaniswa namavalvu esango namabhola ebhola, amavalvu ovemvane afaneleka kumasistimu amapayipi anezidingo zokulahlekelwa ingcindezi eqinile.
7:Hlola imiyalelo yokukhetha i-valve
Ama-valve okuhlola ngokuvamile afanelekela imidiya ehlanzekile, hhayi imidiya equkethe izinhlayiya eziqinile kanye ne-viscosity ephezulu. Uma ≤40mm, i-valve yokuhlola i-lift kufanele isetshenziswe (ivunyelwe kuphela ukufakwa epayipini elivundlile); lapho i-DN=50～400mm, kufanele kusetshenziswe ivalvu yokuhlola ukushwibeka (ingafakwa kuwo womabili amapayipi avundlile naqondile, njengokuthi Ifakwe epayipini eliqondile, isiqondiso sokugeleza kwendawo ephakathi kufanele sisuke phansi siye phezulu);
Uma i-DN≥450mm, i-valve yokuhlola i-buffer kufanele isetshenziswe; lapho i-DN=100～400mm, i-valve yokuhlola i-wafer nayo ingasetshenziswa; i-valve yokuhlola i-swing ingenziwa ibe yingcindezi yokusebenza ephezulu kakhulu, i-PN ingafinyelela ku-42MPa, Ingasetshenziswa kunoma iyiphi indawo yokusebenza nanoma yiluphi uhla lokushisa olusebenzayo ngokusho kwezinto ezahlukene zegobolondo nezingxenye zokuvala.
Okuphakathi kwamanzi, isitimu, igesi, i-corrosive medium, uwoyela, umuthi, njll. Izinga lokushisa elisebenzayo le-medium liphakathi kuka -196～800℃.
8:Imiyalo yokukhetha i-valve ye-diaphragm
I-valve ye-diaphragm ifanele uwoyela, amanzi, i-acidic medium kanye nendawo equkethe izinto eziqinile ezimisiwe lapho izinga lokushisa elisebenzayo lingaphansi kuka-200 ℃ futhi ingcindezi ingaphansi kuka-1.0MPa. Ayilungele i-organic solvent kanye ne-oxidant medium eqinile;
Ama-valve we-diaphragm weir kufanele akhethelwe imidiya ye-granular abrasive, futhi ithebula lezimpawu zokugeleza lamavalvu we-diaphragm weir kufanele kubhekiswe kulo lapho kukhethwa amavalvu e-diaphragm exakile; ama-valve e-diaphragm aqondile kufanele akhethwe uketshezi lwe-viscous, i-cement slurry kanye nemidiya ye-sedimentary; amavalvu e-diaphragm akufanele asetshenziselwe amapayipi evacuum ngaphandle kwezidingo ezithile Impahla yomgwaqo kanye ne-vacuum.
Umbuzo nempendulo yokukhetha i-valve
1. Yiziphi izici ezintathu ezibalulekile okufanele zicatshangelwe lapho kukhethwa i-ejensi esebenzayo?
Ukukhishwa kwe-actuator kufanele kube kukhulu kunomthwalo we-valve futhi kufanele kufaniswe ngokunengqondo.
Uma uhlola inhlanganisela evamile, kuyadingeka ukucabangela ukuthi umehluko ovumelekile wokucindezela ochazwe yi-valve uhlangabezana nezidingo zenqubo. Uma umehluko wengcindezi mkhulu, amandla angalingani ku-spool kufanele abalwe.
Kuyadingeka ukucabangela ukuthi isivinini sokuphendula se-actuator siyahlangabezana yini nezidingo zokusebenza kwenqubo, ikakhulukazi i-actuator kagesi.
2. Uma kuqhathaniswa nama-actuator we-pneumatic, yiziphi izici zama-actuator kagesi, futhi yiziphi izinhlobo zokuphuma ezikhona?
Umthombo wokushayela kagesi amandla kagesi, alula futhi alula, ane-thrust ephezulu, i-torque kanye nokuqina. Kodwa isakhiwo siyinkimbinkimbi futhi ukwethembeka akulungile. Ibiza kakhulu kune-pneumatic ezincazelweni ezincane neziphakathi. Ivamise ukusetshenziswa ezikhathini lapho kungekho mthombo wegesi noma lapho kungaqhumeki ngokuqinile futhi kungashi. I-actuator kagesi inamafomu amathathu okukhiphayo: i-angular stroke, i-linear stroke, kanye ne-multi-turn.
3. Kungani umehluko we-cut-off pressure valve we-quarter-turn umkhulu?
Umehluko we-cut-off pressure ye-valve yokujika kwekota mkhulu ngenxa yokuthi amandla angumphumela akhiqizwa i-medium ku-valve core noma i-valve plate akhiqiza i-torque encane kakhulu ku-shaft ejikelezayo, ngakho-ke ingakwazi ukumelana nomehluko omkhulu wengcindezi. Amavalvu ovemvane namavalvu ebhola yiwona ajwayeleke kakhulu ama-quarter-turn valves.
4. Yimaphi ama-valve okudingeka akhethwe ukuze aqondise ukugeleza? kanjani ukukhetha?
Amavalvu okulawula uphawu olulodwa njengamavalvu esihlalo esisodwa, amavalvu anomfutho ophakeme, namavalvu anemikhono enophawu olulodwa angenazimbobo zebhalansi adinga ukugeleza. Kukhona okuhle nokubi ukugeleza okuvulekile nokugeleza kuvaliwe. I-valve yohlobo oluvulekile lokugeleza isebenza ngokuzinzile, kodwa ukusebenza kokuzihlanza kanye nokusebenza kokuvala akukuhle, futhi ukuphila kufushane; i-valve yohlobo lwe-flow-close inokuphila isikhathi eside, ukusebenza kokuzihlanza kanye nokusebenza kahle kokuvala uphawu, kodwa ukuzinza kubi lapho ububanzi be-stem buncane kunobubanzi bomgogodla we-valve.
Amavalvu esihlalo esisodwa, ama-valve amancane agelezayo, namavalvu anemikhono enesivalo esisodwa kuvame ukukhethwa ukuthi ageleze avuleke, futhi ageleze avale lapho kunezidingo eziqinile zokukhukhula noma zokuzihlanza. Ivalvu yokulawula isici esinezindawo ezimbili ikhetha uhlobo oluvaliwe lokugeleza.
5. Ngaphezu kwamavalvu anesihlalo esisodwa kanye nezihlalo ezimbili kanye namavalvu emikhono, yimaphi amanye amavalvu anemisebenzi yokulawula?
Amavalvu e-diaphragm, ama-butterfly valves, ama-valve ebhola amise okwe-O (ikakhulukazi anqanyuliwe), ama-valve ebhola amise okwe-V (isilinganiso esikhulu sokulungisa nomphumela wokugunda), kanye namavalvu e-eccentric rotary wonke amavalvu anemisebenzi yokulungisa.
6. Kungani ukukhetha imodeli kubaluleke ngaphezu kokubala?
Ukuqhathanisa ukubala nokukhetha, ukukhetha kubaluleke kakhulu futhi kuyinkimbinkimbi kakhulu. Ngenxa yokuthi ukubala kumane kuwukubala kwefomula elula, akukona ngokwako kulele ekunembeni kwefomula, kodwa ekunembeni kwemingcele yenqubo enikeziwe.
Ukukhethwa kuhilela okuqukethwe okuningi, futhi ukunganaki okuncane kuzoholela ekukhethweni okungalungile, okungabangeli nje ukuchithwa kwabasebenzi, izinto ezibonakalayo kanye nezinsiza zezezimali, kodwa futhi nomphumela wokusetshenziswa ongagculisi, okuletha izinkinga eziningana zokusetshenziswa, njengokuthembeka, ubude bokuphila, kanye nokusebenza. Ikhwalithi njll.
7. Kungani ivalvu evalwe kabili ingasetshenziswa njengevalvu yokuvala?
Inzuzo yomgogodla we-valve enezihlalo ezimbili yisakhiwo sebhalansi yamandla, okuvumela umehluko omkhulu wengcindezi, kodwa ukonakala kwayo okuvelele ukuthi izindawo ezimbili zokuvala azikwazi ukuxhumana kahle ngesikhathi esisodwa, okuholela ekuvuzeni okukhulu.
Uma isetshenziswa ngokungemthetho futhi ngempoqo ukunqamula imicimbi, umphumela ngokusobala awumuhle. Noma ngabe kwenziwa ukuthuthukiswa okuningi (okufana ne-valve ye-sleeve evalwe kabili) ngenxa yayo, akukhuthazwa.
8. Kungani i-valve yezihlalo eziphindwe kabili kulula ukuyishintsha lapho isebenza ngokuvula okuncane?
Ngomgogodla owodwa, lapho okuphakathi kuwuhlobo oluvulekile lokugeleza, ukuzinza kwe-valve kuhle; lapho okuphakathi kuwuhlobo oluvaliwe lokugeleza, ukuzinza kwe-valve kubi. I-valve yezihlalo ezimbili inama-spool amabili, i-spool engezansi ivaliwe, kanti i-spool ephezulu ivulekile.
Ngale ndlela, lapho usebenza ngokuvula okuncane, umgogodla we-valve ovaliwe ogelezayo ungase ubangele ukudlidliza kwe-valve, yingakho i-valve enezihlalo ezimbili ayikwazi ukusetshenziselwa ukusebenza ngokuvula okuncane.
9. Yiziphi izici zevalvu yokulawula yesihlalo esisodwa esiqondile? Isetshenziswa kuphi?
Ukugeleza kokuvuza kuncane, ngoba kunomgogodla owodwa kuphela we-valve, kulula ukuqinisekisa ukuvala uphawu. Izinga elijwayelekile lokugeleza kokukhishwa ngu-0.01% KV, futhi enye idizayini ingasetshenziswa njengevalvu yokuvala.
Umehluko wengcindezi ovumelekile mncane, futhi i-thrust inkulu ngenxa yamandla angalingani. Ivalvu △P ye-DN100 ingu-120KPa kuphela.
Amandla okujikeleza mancane. I-KV ye-DN100 ingama-120 kuphela. Ivamise ukusetshenziswa ezikhathini lapho ukuvuza kukuncane futhi umehluko wengcindezi ungemkhulu.
10. Yiziphi izici zevalvu yokulawula izihlalo ezimbili eziqondile? Isetshenziswa kuphi?
Umehluko ovunyelwe wengcindezi mkhulu, ngoba ungasusa amandla amaningi angalingani. I-valve ye-DN100 △P ingu-280KPa.
Umthamo omkhulu wokujikeleza. I-KV ye-DN100 ingu-160.
Ukuvuza kukhulu ngoba ama-spools amabili awakwazi ukuvaleka ngesikhathi esisodwa. Izinga lokugeleza elijwayelekile ngu-0.1%KV, okuphindwe ka-10 kunevalvu yesihlalo esisodwa. Ivalvu yokulawula izihlalo ezimbili eqondile isetshenziswa kakhulu ezikhathini ezinomehluko wengcindezi ephezulu kanye nezidingo eziphansi zokuvuza.
11. Kungani ukusebenza kwe-anti-blocking ye-valve yokulawula i-straight-stroke kungalungile, futhi i-engeli-stroke valve inokusebenza okuhle kokuvinjelwa?
I-spool ye-straight-stroke valve i-throttling eqondile, futhi okuphakathi kugeleza ngaphakathi nangaphandle ngokuvundlile. Indlela yokugeleza ku-valve cavity izophenduka nakanjani futhi ihlehle, okwenza indlela yokugeleza yevalvu ibe nzima kakhulu (umumo ufana nomumo othi "S" ohlanekezelwe). Ngale ndlela, kunezindawo eziningi ezifile, ezihlinzeka ngendawo yokuna kwe-medium, futhi uma izinto ziqhubeka kanje, kuzodala ukuvinjelwa.
Ukuqondiswa kwe-throttling ye-valve ye-quarter-turn isiqondiso esivundlile. I-medium igeleza iphinde iphume ngokuvundlile, okulula ukuyithatha indawo engcolile. Ngesikhathi esifanayo, indlela yokugeleza ilula, futhi isikhala semvula ephakathi sincane, ngakho-ke i-valve ye-quarter-turn valve inokusebenza okuhle kokuvimbela ukuvimbela.
12. Kungaphansi kwaziphi izimo lapho ngidinga ukusebenzisa indawo yokubeka i-valve?
Lapho ukungqubuzana kukhulu futhi ukuma okunembile kuyadingeka. Isibonelo, izinga lokushisa eliphezulu kanye nama-valve okulawula ukushisa okuphansi noma ama-valve okulawula ane-flexible graphite packing;
Inqubo ehamba kancane idinga ukwandisa isivinini sokuphendula se-valve elawulayo. Isibonelo, uhlelo lokulungiswa lokushisa, izinga le-liquid, ukuhlaziywa kanye neminye imingcele.
Kuyadingeka ukwandisa amandla okukhipha kanye namandla okusika we-actuator. Isibonelo, i-valve yesihlalo esisodwa ene-DN≥25, i-valve yezihlalo ezimbili ene-DN>100. Lapho ingcindezi yehla kuzo zombili iziphetho zevalvu △P>1MPa noma ingcindezi ye-inlet P1>10MPa.
Ekusebenzeni kwesistimu yokulawula uhla lokuhlukanisa kanye ne-valve yokulawula, ngezinye izikhathi kuyadingeka ukushintsha izindlela zokuvula umoya nokuvala umoya.
Kuyadingeka ukushintsha izici zokugeleza kwe-valve elawulayo.
13. Yiziphi izinyathelo eziyisikhombisa zokunquma ubukhulu bevalve elawulayo?
Nquma ukugeleza okubaliwe-Qmax, Qmin
Nquma umehluko wengcindezi obaliwe-khetha inani lokumelana no-S ngokusho kwezici zesistimu, bese unquma umehluko wengcindezi obaliwe (lapho i-valve ivuliwe ngokugcwele);
Bala i-coefficient yokugeleza-khetha ishadi lefomula yokubala elifanele noma isofthiwe ukuze uthole ubuningi nobuncane be-KV;
Ukukhetha inani le-KV——Ngokwenani eliphakeme le-KV ochungechungeni lomkhiqizo olukhethiwe, i-KV eseduze kakhulu negiya lokuqala isetshenziselwa ukuthola izinga lokukhetha eliyinhloko;
Ukuvula isheke lokubala-lapho i-Qmax idingeka, ≯90% ukuvulwa kwevalvu; lapho i-Qmin ingu-≮10% wokuvulwa kwevalvu;
Isibalo sokuhlola isilinganiso esilungisekayo——imfuneko evamile kufanele ibe ≮10; Imfuneko ye-Ractual＞R
Isilinganiso siyanqunywa-uma singafanelekile, khetha kabusha inani le-KV bese uqinisekisa futhi.
14. Kungani ivalvu yemikhono ithatha indawo yesihlalo esisodwa kanye nesihlalo esikabili kodwa ingakutholi okufunayo?
Ivalvu yemikhono eyaphuma ngeminyaka yawo-1960 yayisetshenziswa kakhulu ekhaya naphesheya ngeminyaka yawo-1970. Ezitshalweni ze-petrochemical ezethulwa ngawo-1980, ama-sleeve valves aba nengxenye enkulu. Ngaleso sikhathi, abantu abaningi babekholelwa ukuthi ama-sleeve valves angashintsha ama-valve angashadile namabili. I-valve yesihlalo yaba umkhiqizo wesizukulwane sesibili.
Kuze kube manje, lokhu akunjalo. Amavalvu esihlalo esisodwa, ama-valve anezihlalo ezimbili, nama-sleeve valves asetshenziswa ngokulinganayo. Lokhu kungenxa yokuthi i-sleeve valve ithuthukisa kuphela ifomu lokudonsa, ukuzinza nokugcinwa kangcono kune-valve yesihlalo esisodwa, kodwa isisindo sayo, izinkomba ezivimbela ukuvinjelwa kanye nokuvuza zihambisana ne-valve yesihlalo esisodwa kanye ne-double, ingashintsha kanjani i-valve eyodwa nephindwe kabili. amavalvu esihlalo Indwangu yoboya? Ngakho-ke, zingasetshenziswa kuphela ndawonye.
15. Kungani kufanele kusetshenziswe uphawu oluqinile ngangokunokwenzeka kumavalvu okuvala?
Ukuvuza kwe-valve yokuvala kuphansi ngangokunokwenzeka. Ukuvuza kwevalvu evalwe ngokuthambile kuphansi kakhulu. Yiqiniso, umphumela wokuvala muhle, kodwa awukwazi ukumelana nokugqoka futhi unokuthembeka okubi. Uma sibheka izindinganiso eziphindwe kabili zokuvuza okuncane nokuvala okuthembekile, ukuvala okuthambile akulungile njengokuvala okunzima.
Isibonelo, i-valve elawula ukukhanya kwe-ultra-light esebenza ngokugcwele, evalwe futhi yapakishwa ngokuvikelwa kwe-alloy engagugi, inokwethenjelwa okuphezulu, futhi inenani lokuvuza elingu-10-7, elingavele lihlangabezane nezidingo zevalve yokuvala.
16. Kungani isiqu sevalvu yokulawula i-straight-stroke sizacile?
Kuhilela isimiso esilula somshini: ukungqubuzana kokuslayida okuphezulu kanye nokushwibeka okuphansi. I-valve ye-valve ye-straight-stroke valve ihamba phezulu naphansi, futhi ukupakisha kucindezelwe kancane, kuzopakisha isiqu se-valve siqine kakhulu, okuholela kumehluko omkhulu wokubuya.
Ngenxa yalesi sizathu, isiqu se-valve siklanyelwe ukuba sibe sincane kakhulu, futhi ukupakisha kusebenzisa ukupakisha kwe-PTFE nge-coefficient encane ye-friction ukuze kuncishiswe i-backlash, kodwa inkinga ukuthi isiqu se-valve sincane, okulula ukugoba, nokupakisha. ukuphila kufushane.
Indlela engcono kakhulu yokuxazulula le nkinga ukusebenzisa isiqu se-valve yokuhamba, okungukuthi, i-quarter-turn valve. Isiqu saso siwugqinsi izikhathi ezi-2 kuya kwezi-3 kunesiqu se-valve eqondile. Isebenzisa futhi ukupakishwa kwe-graphite yempilo ende kanye nokuqina kwesiqu. Kuhle, impilo yokupakisha yinde, kodwa i-torque ye-friction incane futhi i-backlash incane.
Ingabe ufuna abantu abaningi bazi ulwazi lwakho nolwazi emsebenzini? Uma uhlanganyela emsebenzini wobuchwepheshe bemishini, futhi unolwazi mayelana nokugcinwa kwama-valve, njll., ungaxhumana nathi, mhlawumbe ulwazi lwakho nolwazi lwakho Kuzosiza abantu abaningi.
Isikhathi sokuthumela: Nov-27-2021