Mukuita kwekusiyanisa kudzvanywa kwekutarisa, tinogona kuona kuti dzimwe nguva kubuda kweiyo mutsauko kudzvanywa transmitter inodiwa kuti igadziriswe kuita square midzi 4 ~ 20mA chiratidzo. Zvishandiso zvakadaro zvinowanzoitika mumaindasitiri ekuyeresa kuyerera system uchishandisa musiyano wekumanikidza musimboti inova imwe yenzira dzakakurumbira dzekuyerera kweyero yekutarisa. Mushure mekunge kuyerwa kweDP kuyerera kwaongororwa muchidimbu tinogona here kunzwisisa basa rekusiyanisa kudzvanya transmitter mukubatsira flowmeter kushanda.
Mamita anoyerera anoita basa rakakosha mukutarisa mwero wemvura pakati peakaomeswa pombi pombi network nekupa kuyerera kwekuverenga panguva yakakodzera uye chaiyo mabhesi ayo anobatsira kune inoshanda manejimendi uye kuchengetedzwa kwekushanda. Differential pressure approach ndeimwe yehukuru hwekuyeresa kuyerera tekinoroji iyo inosanganisira marudzi ekuyerera. Iwo akasiyana muchimiro asi anogovana zvakafanana zvibodzwa zvekushandisa kugadzira kudzvanywa gap yekuyerera komputa iyo yakavakirwa pane yakakosha musimboti we.Equation yaBernoulli: Simba rose rinosanganisira kinetic uye simba rinogona kuitika mukuyerera kwemvura rinoramba riripo pasinei nemamiriro ezvinhu. Naizvozvo chekutanga chinhu cheaya DP flowmeters chinenge chiri throttling mudziyo (orifice plate, venturi chubhu, pitot chubhu, v-cone, nezvimwewo) kugadzira kuyerera kukwirisa muchikamu chenzvimbo, zvichitungamira kudonha muhydrostatic pressure yemvura.
Apa ndipo panopinda mutsauko wekudzvanya transmitter. Zvinhu zvekutanga zvinongori zvemichina, izvo zvinogadzira mutsauko wekumanikidza mukuita asi hapana chimwe chazvo chinokwanisa kuyera zvakananga kukosha uye chiratidzo chekubuda. Saka ivo vanoda mubatsiri kuti vaone mutsauko pakati pekukwira nekudzika kwemvura uye vozoishandura kuita inobuda chiratidzo chekuyeresa kukosha -- inonzwika senge ibasa rakanyatsokodzera kusiyanisa kudzvanya transmitter.
Mushure mekunge kuyerwa kweDP kwatangwa, mubvunzo ungave wekuti kusiyanisa kudzvanywa uye volumetric kuyerera kungave kwakabatana sei? Kubva paBernoulli's Equation uye Continuity Equation, hukama husina hukama huripo pakati pezvakagadzirwa zvakasiyana-siyana (ΔP) uye chaiyo yekuyerera kwemvura (Q):
Q=K√ΔP
Apo K inomiririra mita-chaiyo coefficient inosarudzwa nezvinhu rudzi rwechinhu chekutanga uye zvimwe zvinhu zvakawanda (fluid density, saizi yepombi zvichingodaro). Transmitter's mbishi 4 ~ 20mA siginecha haina mutsara wekuyerera mwero uye isingakwanise kunyatso kumiririra maitiro ayo. Nyaya yacho inogona kugadziriswa nekubatanidzwa kwesquare root extraction (SRE) iyo midzi midzi yekuzvarwa ΔP ichiita kuti chiratidzo chienzane nevolumetric flow rate pakupedzisira.
Kana iyo transmitter isingakwanise kuita SRE mukati, computation inofanirwa kubatwa nekunze kuyerera komputa kana yekudzora sisitimu iyo inogona kusanganisa kuomarara uye zvinogona kukanganisa mapoinzi muchiratidzo chekufambisa. Naizvozvo ano DP transmitters anowanzo ane yakavakirwa-mukati chiratidzo SRE basa pane analog wedunhu uye anogona kuburitsa square midzi 4 ~ 20mA. Zvakare, DP transmitters inogona kuita yakaderera kuyerera-kurerutsa kudzikamisa sensor drift iyo inogona kukwidziridzwa zvisingaite pakuyerera kwakaderera. Iri software basa rinomanikidza kuburitsa kune 4 mA (0% kuyerera) apo kuyerera kwekombuta kunowira pasi pechikumbaridzo chakatsanangurwa kudzivirira chiratidzo chisina kujeka uye kuyerera kwenhema kuunganidzwa.
Differential pressure flow measurement masisitimu ndeimwe yeakanyanya kuratidzwa uye yakakurumbira kuyerera kwekudzora tekinoroji. Nepo ivo vachipa mabhenefiti akatanhamara, pane zvakare zvisingakwanisi nekuda kwechimiro uye musimboti:
+ Yakamisikidzwa dhizaini, yakanyatso kusimbiswa tekinoroji
+ Yakasimba uye yakasimba chimiro, hapana zvikamu zvinofamba
+ Kuvandudzwa kwechokwadi uye kugadzikana
- Kurasikirwa kwechigarire kudzvinyirira
- Narrow turndown ratio
- Sensitive kune shanduko yemvura density uye zvimwe zvinhu
Kusarudza flowmeter yakakodzera kwakakosha pakubudirira uye kurongeka kweyero yekuyerera kwemvura. Nekunyatsofunga nezvekushandisa zvinhu zvinogona vashandisi kuita sarudzo dzine ruzivo dzinoenderana nezvinodiwa chaizvo.Shanghai Wangyuanyave ichiita mukugadzira uye sevhisi yekuyera uye yekudzora chiridzwa kweanopfuura makore makumi maviri kusanganisira ese marudzi ekuyerera, mutsauko wekumanikidza transmitters uye zvimwe zvigadziriso zvekuyerera kuyerwa. Kana iwe uine mumwe mubvunzo kana zvinodiwa, ndapota usazeza kutibata nesu.
Nguva yekutumira: Aug-25-2025