Ulusi wa BSPPvs. NPT Thread: Kusiyana Kofunika Kwambiri Ndi Mainjiniya Aliyense Ayenera Kudziwa

Mu makina amadzimadzi a mafakitale, komwe 70% ya kutuluka kwa madzi kumachokera ku kusankha kosayenera kwa ulusi, kumvetsetsa kusiyana kwakukulu pakati pa ulusi wa G ndi NPT sikungodziwa zaukadaulo - ndikofunika kwambiri pachitetezo.

Chiyambi ndi Miyezo: Mkangano wa Miyambo ya Uinjiniya

Ulusi wa BSPP, womwe umadziwika kuti British Standard Pipe Parallel (BSPP), zimayambira ku machitidwe aukadaulo aku Europe. Motsogozedwa ndi ISO 228-1, ulusi wofanana uwu wa 55° umayang'anira kuyanjana kwapadziko lonse mu ntchito zotsika mphamvu. Kapangidwe kawo kamasonyeza mphamvu ya dongosolo la metric, ndi miyeso yofanana ndimtanda misika yambiri padziko lonse lapansi kunja kwa North America.

Motsutsana, Chitoliro cha Mapaipi cha Dziko Lonse (NPT)Ulusi unachokera ku zosowa zamafakitale aku America, zomwe zafotokozedwa ndi ANSI/ASME B1.20.1. Dongosolo la ulusi locheperako la 60° linapangidwa kuti likhale lodalirika kwambiri, kukhala msana wa machitidwe amadzimadzi aku North America. Chiŵerengero chake chocheperako (1:16) chimapanga mphamvu yodzilimbitsa yokha pamene ulusi ukugwira ntchito, chinthu chomwe sichipezeka mu ulusi wa BSPP.

Zoyambira pa Kapangidwe: Jiyometri Imalamulira Magwiridwe Antchito

Kusiyana kwakukulu kwambiri kuli mu geometry yawo:

• Ulusi wa BSPPsAli ndi makoma ofanana okhala ndi ngodya ya ulusi wa 55°. Popeza alibe zofewa, amadalira ma gasket akunja kapena mphete za O kuti azitseke. Mwachitsanzo, ulusi wa AG 1/2" umasunga mainchesi awiri ofanana a 20.955mm kutalika kwake konse.
• Ulusi wa NPTImakhala ndi 1:16 taper (kusintha kwa mainchesi 1mm pa kutalika kwa 16mm) ndi ngodya ya ulusi wa 60°. Izi (kapangidwe kocheperako) zimapangitsa kuti chitsulo chigwirizane ndi chitsulo chikamangiriridwa, zomwe zimathandiza kutseka popanda zowonjezera zina. Ulusi wa 1/2" NPT umachepa kuchokera pa 21.223mm mpaka 18.321mm kumapeto kwake kopapatiza.

Kupindika kwa ulusi kumasiyanitsa kwambiri: pomwe ulusi wa G 1/2" umagwiritsa ntchito ulusi 14 pa inchi (TPI), ulusi wa NPT wa kukula kofanana umagwiritsanso ntchito 14 TPI—kupanga kuthekera koopsa kophatikizana ngati kukakamizidwa pamodzi.

Njira Zotsekera: Njira Ziwiri Zotetezera

Ulusi wa BSPP umakhala ndi mfundo yokakamiza kusindikizaKapangidwe kawo kofanana kamasiya mipata yaying'ono pakati pa malo olumikizirana, zomwe zimafuna mphete za rabara, zotsukira ulusi, kapena zotsekera zopanda mpweya kuti zisatuluke. Izi zimawapangitsa kukhala abwino kwambiri pamakina otsika mphamvu (≤16bar) monga mapaipi okhala m'nyumba ndi mizere ya mpweya wopanikizika, komwe nthawi zambiri kuchotsedwa kwa mapaipi kumakhala kokwera.

Ulusi wa NPT umagwiritsidwa ntchito ukadaulo wodzitsekeraPamene ulusi wopindika ukugwirana, umasinthasintha pang'ono kuti upange chisindikizo chachitsulo ndi chitsulo chomwe chimakulitsidwa ndi ulusi kapena tepi ya PTFE. Izi zimawathandiza kuthana ndi kupsinjika mpaka 6000psi pazinthu zofunika kwambiri monga mafuta. mapaipindi machitidwe a hydraulic. Chodziwika bwino n'chakuti, kutseka bwino kwa NPT kumawonjezeka pamene kugwedezeka—ubwino waukulu pa zipangizo zoyenda.

                                    Zopangira ulusi wa BSPP                                                                                            Zopangira ulusi wa NPT

Malo Ogwiritsira Ntchito: Kumene Ulusi Uliwonse Umapambana

Ulusi wa BSPPMapulogalamu:

• Makina a mapaipi aku Europe ndi Asia
• Kugawa madzi ndi mpweya mopanda mphamvu kwambiri (≤10bar)
• Mapanelo a zida omwe amafunikira kukonza pafupipafupi
• Machitidwe owongolera ma pneumatic pogwiritsa ntchito zida zodulira mwachangu

Mapulogalamu a NPT Thread:

• Mapaipi a mafakitale aku North America
• Ma hydraulic circuits amphamvu kwambiri
• Zipangizo zofufuzira mafuta ndi gasi
• Makina oletsa moto omwe amafuna mavoti a 6000psi

[Kugawikana kwa malo kukupitirirabe: Ulusi wa BSPP ukulamulira m'madera omwe ali ndi muyezo wa ISO, pomwe NPT ikupitilirabe kufalikira m'misika yomwe yatchulidwa ndi ANSI. Kusakaniza miyezo iyi—monga kukhazikitsa valavu yolumikizidwa ndi BSPP pa payipi ya NPT—kwayambitsa ngozi zokwera mtengo zamafakitale, kuphatikizapo kutayikira kwa mankhwala ndi kulephera kwa makina.]

Malangizo Othandiza Osankhira

Posankha pakati pa ulusi wa BSPP ndi NPT, mainjiniya ayenera:

1. Yang'anani miyezo ya m'deralo (ISO vs. ANSI) kuti mudziwe komwe polojekiti ili
2. Yesani kuthamanga kwa makina (NPT ya >16bar applications)

3. Ganizirani zofunikira pa kukonza (G pa kusokoneza pafupipafupi)
   4. Tsimikizirani kuti zinthu zikugwirizana ndi zinthu zotsekera
   5. Gwiritsani ntchito miyeso yapadera kuti mutsimikizire

Kumbukirani: Ngakhale kusiyana pang'ono kwa ngodya ya ulusi (55° vs. 60°) kumalepheretsa kuyanjana. Kafukufuku wamakampani wa 2024 adapeza kuti 40% ya "kutuluka kwachinsinsi" kumachokera ku kuyesa kusinthana pakati pa miyezo iyi.

Kutsiliza: Kulondola Kumaletsa Masoka

Mu uinjiniya wamakina amadzimadzi, kusankha ulusi kumafuna kulondola kofanana ndi kuwerengera kapangidwe kake. Ulusi wa G ndi NPT umayimira mayankho osiyanasiyana pavuto lomwelo—lililonse lokonzedwa bwino kuti ligwirizane ndi mikhalidwe inayake. Mwa kulemekeza cholinga chawo cha kapangidwe ndi malire ogwiritsira ntchito, mainjiniya samatsimikizira kuti makinawo amagwira ntchito bwino, komanso kuti chitetezo cha ntchito chikhale chotani.

Kuti mudziwe zambiri zaukadaulo kapena mayankho a ulusi wapadera, funsani gulu lathu la mainjiniya lero. Kudalirika kwa polojekiti yanu yotsatira kumadalira kupeza bwino tsatanetsatane wofunikirawu.

FAQ:

1. Kodi ulusi wa G umagwirizana ndi ulusi wa NPT?

Ayi. Ulusi wa G ndi ulusi wa NPT zimasiyana mu ngodya ndi pitch (ulusi pa inchi).

2. Kodi kusiyana pakati pa ulusi wa BSPP ndi NPT ndi kotani?

Ulusi umasiyana mu ngodya ndi pitch (chiwerengero cha ulusi pa inchi). BSPP ndi 55°, pomwe NPT ndi 60°.

3. Kodi ulusi wa BSP ndi G ndi wofanana?

Mwanjira ina, ndi choncho. Malinga ndi muyezo waposachedwa, BS EN ISO-228-1, ulusi wa G ndi wofanana ndi ulusi wa BSPP, nthambi ya ulusi wa BSP, ndipo umagwirizana. Miyezo yaposachedwa ya ulusi wosiyanasiyana yaperekedwa kumapeto kwa nkhaniyi kuti ikuthandizeni kusiyanitsa.

4. Kodi BSPP ingalumikizidwe ndi NPT?

Ayi, ulusi uwiriwu uli ndi ma ngodya ndi ma pitches osiyana (ulusi pa inchi iliyonse).

5. Kodi BSPP ndi BSP ndi zofanana?

BSPP ndi yochokera ku muyezo wa ulusi wa chitoliro cha BSP British 55°. BSPP ndi ulusi wa chitoliro cholunjika cha Imperial 55°.

 Magwero a deta: ISO 228-1, ANSI/ASME B1.20.1, Lipoti la Industrial Thread Standards Consortium 2025