Kutheni iivalve isixhobo sombane kubonakala overload phenomenon? Ziziphi iindlela zokukhusela?
I-Petrochemical, isikhululo samandla, i-metallurgy kunye namanye amashishini afuna ukuqhubeka, ukuhamba kakuhle, ukusebenza komjikelo omde. Ke ngoko, kufuna ukusetyenziswa kwevalve kufuneka kube nokuthembeka okuphezulu, into yokhuseleko inkulu, ayinakwenzeka ngenxa yokuba ukusilela kwevalvu kubangele ukhuseleko olubi lwemveliso kunye nengozi yokwenzakala komntu, ukuhlangabezana nemfuno yexesha elide lesixhobo, imveliso eqhubekayo iyanceda. ixesha elide, ukongeza, ukunciphisa okanye ukuphepha ngenxa yokuvuza kwevalve, ukudala iifektri ezicocekileyo kunye nempucuko, ukuphunyezwa kwe-HsE (impilo, ukhuseleko, indawo) ulawulo.
Okokuqala, umgaqo wokukhetha ivalve
(1) Ukhuseleko kunye nokuthembeka
I-Petrochemical, isikhululo samandla, i-metallurgy kunye namanye amashishini afuna ukuqhubeka, ukuhamba kakuhle, ukusebenza komjikelo omde. Ke ngoko, kufuna ukusetyenziswa kweivalvekufuneka ibe nokuthembeka okuphezulu, into yokhuseleko inkulu, ayikwazi ngenxa yokuba ukusilela kwevalve kubangele ukhuseleko olubi lwemveliso kunye nengozi yokwenzakala komntu, ukuhlangabezana nemfuno yexesha elide lesixhobo, imveliso eqhubekayo iyinzuzo ixesha elide, ukongeza. , ukunciphisa okanye ukuphepha ngenxa yokuvuza kwevalve, ukudala iifektri ezicocekileyo kunye nempucuko, ukuphunyezwa kwe-HsE (impilo, ukhuseleko, indawo) ulawulo.
(2) Ukuhlangabezana neemfuno zokuvelisa inkqubo
I-valve kufuneka ihlangabezane nokusetyenziswa kwe-medium, i-pressure pressure, iqondo lokushisa lokusebenza kunye neemfuno zokusetyenziswa, eyona mfuneko isisiseko sokukhetha i-valve. Ukukhuselwa koxinzelelo lwevalve, ukukhupha okuphakathi, kufuneka kukhethe ivalve yokhuseleko, ivalve yoncedo, isidingo sokuthintela ukujikeleza okuphakathi kwinkqubo yokusebenza, kufuneka isebenzise ivalve yokukhangela, ikhuphe ngokuzenzekelayo imibhobho yomphunga kunye nezixhobo eziyimfuneko yokuqhubeka. ukuvelisa amanzi ajikisiweyo, umoya kunye nezinye iigesi ezingenayo i-condensable, ukukhusela umphunga ukuba ubaleke kwakhona ngexesha elifanayo, kufuneka ukhethe umgibe. Ukongezelela, xa i-medium is corrosion, izinto eziphathekayo ezinokumelana ne-corrosion efanelekileyo kufuneka zikhethwe.
(3) Ukusebenza ngokulula, ukufakwa, ukuhlolwa (ukugcinwa) ukulungiswa
Emva kokuba i-valve ifakwe, umqhubi kufuneka akwazi ukuchonga ngokuchanekileyo isalathiso se-valve, uphawu lokuvula, olubonisa umqondiso, kulula ukujongana neziphene ezahlukeneyo eziphuthumayo ngexesha elifanelekileyo kunye nesigqibo. Ngexesha elifanayo, ukhetho olukhethiweyoivalveuhlobo lwesakhiwo kufuneka lube lodwa kangangoko kunokwenzeka, ukufakwa lula, ukuhlolwa (ukugcinwa) ukulungiswa.
(4) Uqoqosho
Ngaphantsi kwesiseko sokuhlangana nokusetyenziswa okuqhelekileyo kwemibhobho yenkqubo, iivalvu ezinexabiso eliphantsi ngokwentelekiso lokwenziwa kunye nesakhiwo esilula kufuneka zikhethwe kangangoko kunokwenzeka ukunciphisa iindleko zezixhobo, kuthintelwe inkcitho yezixhobo zevalve ekrwada kunye nokunciphisa iindleko zofakelo lwevalvu kunye nokunciphisa iindleko zokufakelwa kwevalve kunye nokufakwa kwevalvu. ulondolozo kwixesha elizayo.
Emibini, amanyathelo okukhetha ivalvu
1. Qinisekisa imeko yokusebenza yevalve ngokusetyenziswa kwayo kwisixhobo okanye kwipayipi yenkqubo. Umzekelo, ukusebenza okuphakathi, uxinzelelo lokusebenza kunye nobushushu bokusebenza.
2. Ngokwendlela yokusebenza, indawo yokusebenza kunye neemfuno zomsebenzisi ukumisela ibakala lokusebenza lokutywinwa kwesivalo.
3. Qinisekisa uhlobo kunye nemodi yokuqhuba yevalve ngokusetyenziswa kwayo. Uhlobo olufana nevalve ye-truncation, ivalve elawulayo, ivalve yokhuseleko, enye ivalve ekhethekileyo, njl.
4. Khetha ngokweeparamitha zegama levalve. Uxinzelelo oluncinci kunye nemilinganiselo yevalve iya kugqitywa ngokuhambelana nombhobho wenkqubo efakiweyo. I-valve ifakwe kumbhobho wenkqubo, ngoko ke imeko yokusetyenziswa kwayo kufuneka ihambelane nokukhethwa koyilo lombhobho wenkqubo, inkqubo esemgangathweni esetyenziswa ngumbhobho kunye noxinzelelo lwegama lombhobho luchongiwe, i-valve yoxinzelelo lwegama, ubungakanani begama; uyilo lwevalvu kunye nemigangatho yokuvelisa inokumiselwa. Ezinye iivalvu zisekelwe kwixesha elilinganiselweyo lokuhamba ngevalve okanye ukufuduswa kobukhulu obuqhelekileyo bevalve.
5. Qinisekisa ifom yokudibanisa ye-valve ekupheleni kobuso kunye nombhobho ngokweemeko zokusebenza zangempela kunye nobukhulu obuqhelekileyo be-valve. Njengeflange, i-welding, i-clamping okanye intambo, njl.
6. Ngokwendawo yofakelo lwevalve, indawo yofakelo, ubungakanani begama lokumisela uhlobo lwesakhiwo sohlobo lwesivalo. Njengevalve yesango elimnyama, ivalve yeglowubhu yeAngle, ivalve yebhola esisigxina, njl.
7. Ngokweempawu ze-medium, uxinzelelo lokusebenza kunye nobushushu bokusebenza, ukukhetha ngokuchanekileyo nangokufanelekileyo izinto zeqokobhe levalve kunye namalungu angaphakathi.
Kutheni isixhobo sombane sevalve sibonakala sigcwele kakhulu? Ziziphi iindlela zokukhusela?
Isixhobo sombane seValve kukuqonda ulawulo lwevalvu, ulawulo oluzenzekelayo kunye nolawulo olukude izixhobo eziyimfuneko, inkqubo yayo yokuhamba inokulawulwa ngokubetha, i-torque okanye i-axial thrust size. Ngenxa yokuba iimpawu zokusebenza kunye nesantya sokusetyenziswa kwesixhobo sombane sevalve sixhomekeke kuhlobo lwevalve, isixhobo esisebenzayo kunye nendawo yevalve kumbhobho okanye izixhobo, ngoko ke, ukhetho oluchanekileyo lwesixhobo sombane sevalve lubaluleke kakhulu ukukhusela ivalve. isenzeko sokulayisha ngaphezulu (i-torque esebenzayo iphezulu kunetorque yolawulo). Nangona kunjalo, inokugcwala kakhulu ukuba:
I-1, unikezelo lwamandla luphantsi, alukwazi ukufumana i-torque efunekayo, ukwenzela ukuba i-motor iyeke ukujikeleza.
I-2, ngokungalunganga ukusetha umda we-torque, ukuze ibe mkhulu kune-torque yokumisa, okukhokelela kwisizukulwana esiqhubekayo se-torque enkulu kakhulu, ukwenzela ukuba i-motor iyeke ukujikeleza.
I-3, njengendawo yokusetyenziswa okuphakathi, ubushushu obuveliswe phezulu, ngaphezu kobushushu obuvumelekileyo bemoto.
I-4, ngesizathu esithile itorque yokunciphisa ukusilela kwesekethe, ukuze itorque ibe nkulu kakhulu.
I-5, ukusetyenziswa kobushushu be-ambient kuphezulu kakhulu, ngokwentelekiso yenza amandla obushushu bemoto ayancipha.
Ezi ngasentla zezinye zezizathu zokugqithisa, ngenxa yezi zizathu i-phenomenon ye-motor overheating kufuneka iqwalaselwe kwangaphambili, kwaye uthathe amanyathelo okuthintela ukushisa. Ngaphambili, indlela yokukhusela i-motor kukusebenzisa i-fuses, i-overcurrent relays, i-thermal relays, izixhobo ze-thermostatic, njl., kodwa ezi ndlela nazo zineenzuzo zabo kunye nokungalunganga. Kwizixhobo zombane ezinomthwalo oguquguqukayo, akukho ndlela yokukhusela ethembekileyo.
Ngoko ke, indibaniselwano yeendlela kufuneka yamkelwe. Nangona kunjalo, ngenxa yomthwalo ohlukeneyo wesixhobo sombane ngasinye, kunzima ukubeka indlela edibeneyo. Kodwa ubukhulu becala, isiseko esivumelanayo sinokufunyanwa.
Iindlela zokukhusela umthwalo ogqithisileyo owamkelweyo zinokushwankathelwa zibe ziindidi ezimbini:
1. Gweba ukunyuka okanye ukuhla kwe-motor input current;
2. Gweba ubushushu bemoto ngokwayo. Ezi ndlela zimbini zingasentla, nokuba yeyiphi ekufuneka ithathele ingqalelo umthamo wobushushu bemoto enikwe umda wexesha. Kunzima ukuyenza ihambelane neempawu zamandla obushushu bemoto ngendlela enye.
Ke ngoko, kufuneka sikhethe indibaniselwano yeendlela ezisekwe kwisenzo esithembekileyo ngokwesizathu somthwalo ogqithisiweyo ukufezekisa ukhuseleko lomthwalo ogqibeleleyo. I-motor yesixhobo sombane se-Rotock, kuba ifakwe kwi-windings ye-thermostat kunye nenqanaba le-insulation efanayo ye-motor, xa iqondo lokushisa elilinganisiweyo lifikeleleke, i-loop yokulawula i-motor iya kunqunyulwa. Umthamo wokushisa we-thermostat ngokwawo uncinci, kwaye iimpawu zayo ezinqunyelwe ixesha zichongwa yimpawu zamandla okushisa kwemoto, ngoko le yindlela ethembekileyo.
Iindlela zokhuseleko ezisisiseko zokulayisha ngaphezulu zezi:
I-1, i-motor eqhubekayo yokusebenza okanye ukusebenza kwendawo yokukhusela umthwalo ogqithisileyo usebenzisa i-thermostat;
2. I-Thermal relay isetyenziselwa ukukhusela i-motor blocking
3. I-Fuse okanye i-overcurrent relay isetyenziselwa ingozi yesiphaluka esifutshane. Ukhetho oluchanekileyo lwesixhobo sombane sevalve kunye nokuthintela ukugcwala kunxulumene kwaye kufuneka kuqwalaselwe.
Ixesha lokuposa: Jun-23-2022
