BSPT thiab BSP-British Specification rau Tapered Xov
NPT - American Standard Tapered Xov
PT - Nyiv tus qub JIS tus qauv taper xov, sib npaug rau R, Rc ntawm ISO tus qauv
DIN2999 - Tebchaws Europe feem ntau yog German yeeb nkab xov
NPT yog American Standard Taper Pipe Xov rau kev siv dav dav.
Ntawm lawv, N txhais tau tias National (American) American lub teb chaws tus qauv, P txhais tau hais tias PIPE yeeb nkab, T txhais tau tias TAPER cone, thiab lub kaum sab xis yog 60 degree.
Hom yeeb nkab xov no feem ntau siv hauv North America, lossis feem ntau pom siv ANSI specifications. Cov qauv hauv tebchaws tuaj yeem pom hauv GB/T12716-1991
Kuv yuav tsum xyuam xim: NPT cov hniav yuav tsum tau siv nyob rau hauv ANSI specification!
PT
PT hniav yog ib qho imperial tapered xov, thiab lub kaum sab xis ntawm tus hniav yog 55 degree, uas yog feem ntau siv nyob rau hauv sealing. Nws yog feem ntau siv hauv Tebchaws Europe thiab Tebchaws Meskas. Qhov tseeb, JIS tus qauv hauv Taiwan thiab Nyij Pooj kuj ua raws li tus qauv Askiv, thaum Tuam Tshoj siv cov xov xov British. Nws belongs rau tsev neeg Whitworth xov. Cov qauv hauv tebchaws tuaj yeem pom hauv GB/T7306-2000.
Lub British yeeb nkab xov yog ib tug zoo xov, vim hais tias cov hniav tob ntawm cov ntxhib xov yuav ua rau txo lub zog ntawm cov yeeb nkab nrog lub sab nraud txoj kab uas hla ntawm cov xov txiav.
Tsis tas li ntawd, NIPPLE feem ntau yog siv rau hauv kev faib tawm ntawm cov kav dej me me. Lub hom phiaj yog tias phab ntsa tuab ntawm cov NIPPLE yuav yog tuab, uas tuaj yeem ua kom lub zog ntawm qhov tapping. Nyob rau tib lub sijhawm, cov kav dej loj tsis xav tau cov yeeb nkab phab ntsa tuab. Yuav kom txuag tau cov nqi.
PF cov hniav yog cov kab sib txuas rau cov kav dej.
Peb yuav tsum xyuam xim: PT hniav yuav tsum tau siv los ua JIS specifications, thiab lwm yam.!
G yog 55-degree tsis-threaded sealing yeeb nkab xov, uas belongs rau Whitworth xov tsev neeg. Cim raws li G sawv rau cylindrical xov. Cov qauv hauv tebchaws tuaj yeem pom hauv GB/T7307-2001
G yog lub npe dav dav ntawm cov yeeb nkab xov (Guan), thiab qhov sib faib ntawm 55 thiab 60 degrees yog kev ua haujlwm, feem ntau hu ua yeeb nkab voj voog. Uas yog, cov xov yog machined los ntawm ib tug cylindrical nto.
ZG
ZG feem ntau hu ua yeeb nkab cone, uas yog, cov xov yog ua tiav los ntawm lub conical nto. Cov yeeb nkab dej dav dav yog zoo li no. Lub teb chaws qub qauv yog cim raws li Rc
Cov xov metric yog sawv cev los ntawm lub suab, thiab Asmeskas thiab Askiv xov yog sawv cev los ntawm cov xov tooj ntawm cov hniav ib nti. Qhov no yog qhov sib txawv loj tshaj ntawm lawv. Cov xov metric yog 60-degree equilateral hniav hom, thiab British system yog ib qho isosceles 55-degree hniav hom. American xov 60 degrees.
Siv metric units rau metric threads thiab imperial units rau US thiab British threads.
Cov yeeb nkab xov yog tsuas yog siv rau kev sib txuas ntawm cov kav dej, thiab nws cov xov sab hauv thiab sab nraud tau sib raug zoo, thiab muaj ob hom yeeb nkab ncaj thiab tapered yeeb nkab. Lub nominal txoj kab uas hla yog hais txog txoj kab uas hla ntawm cov yeeb nkab txuas, pom tseeb qhov loj txoj kab uas hla ntawm cov xov yog loj dua lub nominal txoj kab uas hla. 1/4, 1/2, 1/8 yog cov nominal diameters ntawm British xov, nyob rau hauv nti.
Kev txheeb xyuas ntawm Inch Unified Threads
Qhov loj ntawm cov xov ntiv tes feem ntau yog qhia los ntawm cov xov tooj ntawm ib nti ntawm qhov ntev ntawm cov xov, hu ua "xov ib nti", uas yog sib npaug ntawm qhov sib npaug ntawm lub suab. Piv txwv li, ib tug xov nrog 8 hniav ib nti muaj ib lub suab ntawm 1/8 nti.
Inch system uniform xov yog dav siv nyob rau hauv nti system teb chaws. Hom xov no tau muab faib ua peb series: coarse xov series UNC, nplua xov series UNF, ntxiv zoo xov series UNFF, ntxiv rau ib tug taag pitch series UN.
Marking method: xov txoj kab uas hla - xov tooj ntawm threads ib nti series code - precision qib
Piv txwv: Coarse Series 3/8—16 UNC—2A
Fine tooth series 3/8—24 UNF—2A
Ntxiv cov hniav zoo nkauj 3/8—32 UNFF—2A
Tsau suab series 3/8—20 UN—2A
Thawj tus lej 3/8 qhia txog sab nraud ntawm cov xov, chav tsev yog nti, thiab hloov mus rau metric unit mm yog muab faib ua 25.4, uas yog, 3/8 × 25.4=9.525mm; tus lej thib ob thiab thib peb 16, 24, 32, thiab 20 yog Tus naj npawb ntawm cov hniav ib nti (tus naj npawb ntawm cov hniav ntawm qhov ntev ntawm 25.4mm); Cov ntawv cim tom qab tus lej thib peb UNC, UNF, UNFF, UN yog cov lej cim, thiab ob tus lej kawg 2A yog cov qib siab.
Piv txwv ntawm kev sawv cev ntawm nti bolts:
LH 2N 5/8 × 3 - 13 UNC-2A
(1) LH yog sab laug (RH yog txoj cai xov, uas tuaj yeem raug tshem tawm).
(2) 2N ob txoj xov.
(3) 5/8 nti xov, 5/8 "OD.
(4) 3 Bolt ntev 3 ".
(5) 13 threads muaj 13 threads ib nti.
(6) UNC unified txheem xov coarse xov.
(7) Qib 2 haum, xov sab nraud (3: Tight fit; 2: Nruab nrab haum; 1: Loose haum) A: Cov xov sab nraud (tuaj yeem tshem tawm) B: Internal xov.
Hloov ntawm 55 degree cylindrical yeeb nkab xov
55 degree cylindrical yeeb nkab xov yog muab los ntawm lub nti system, tab sis nws yog dav siv nyob rau hauv ob qho tib si metric thiab nti lub teb chaws. Nws yog siv los txuas cov yeeb nkab txuas thiab cov kav dej rau kev xa cov kua dej, gases, thiab txhim kho cov xov hlau. Txawm li cas los xij, cov lis dej num ntawm ntau lub teb chaws txawv, thiab lawv yuav tsum tau nias Cov lej txawv teb chaws hauv lub rooj (cov lus sib piv) tau hloov mus rau hauv Suav cov lej, thiab 55 degree cylindrical yeeb nkab xov codes ntawm ntau lub teb chaws tau teev nyob rau hauv cov lus hauv qab no.
lub teb chaws code
Tuam Tshoj
Japan G, PF
British BSP, BSPP
Fabkis
Lub teb chaws Yelemees R (sab hauv xov), K (sab nraud xov)
Yav tas los Soviet Union G, TPУБ
ISO Rp
Hloov ntawm 55 degree tapered yeeb nkab xov
55 degree conical yeeb nkab xov txhais tau hais tias lub kaum sab xis yog 55 degree thiab cov xov muaj taper ntawm 1:16. Cov xov no tau siv dav hauv ntiaj teb, thiab nws lub npe code txawv ntawm lub teb chaws mus rau lub teb chaws, raws li qhia hauv cov lus hauv qab no. Hloov cov lej txawv teb chaws hauv cov lus hauv qab no rau hauv Suav cov lej.
lub teb chaws code
Tuam Tshoj ZG, R (sab nraud xov)
British BSPT, R (sab nraud xov), Rc (sab hauv xov)
Fabkis G (sab nraud xov), R (sab nraud xov)
German R (sab nraud xov)
Nyiv PT, R
ISO R (sab nraud xov), Rc (sab hauv xov)
Hloov ntawm 60 degree conical yeeb nkab xov
60 degree conical yeeb nkab xov yog hais txog cov yeeb nkab xov nrog lub kaum sab xis ntawm 60 degree thiab xov taper ntawm 1:16. Cov xov no yog siv nyob rau hauv kuv lub teb chaws lub tshuab cuab yeej kev lag luam, Tebchaws Meskas, thiab yav dhau los Soviet Union. Nws lub npe code tau txhais ua K yav dhau los hauv kuv lub tebchaws, thiab tom qab ntawd ua Z, thiab tam sim no nws tau hloov mus rau NPT. Saib cov lus hauv qab no rau lub xov tooj sib piv cov lus.
lub teb chaws code
Tuam Tshoj Z (Kub) NPT (Tshiab)
United States NPT
Soviet Union
Kev hloov ntawm 55 degree trapezoidal xov
Trapezoidal xov yog hais txog metric trapezoidal xov nrog lub kaum sab xis ntawm 30 degree. Cov xov ntawm cov xov no kuj zoo ib yam hauv tsev thiab txawv teb chaws, thiab nws cov npe code kuj zoo ib yam. Cov kab lis kev cai yog qhia hauv cov lus hauv qab no.
lub teb chaws code
Tuam Tshoj T (Kub) Tr (Tshiab)
ISO Tr
Lub teb chaws Yelemees Tr
Yav tas los Soviet Union Tr
Xov hom
duab
Raws li kev siv cov xov sib txawv, nws tuaj yeem muab faib ua:
1. International Metric Xov System:
Cov xov tau txais los ntawm kuv lub teb chaws tus qauv CNS. Sab saum toj ntawm tus hniav yog tiaj tus thiab yooj yim tig, thiab hauv qab ntawm cov hniav yog arc-puab los ua kom lub zog ntawm cov xov. Lub kaum sab xis yog 60 degrees, thiab qhov tshwj xeeb yog sawv cev los ntawm M. Metric threads tuaj yeem muab faib ua ob hom: xov coarse thiab xov zoo. Cov ntawv sau xws li M8x1.25. (M: Code, 8: Nominal diameter, 1.25: Pitch).
2. American Standard Xov:
Ob sab saum toj thiab hauv paus ntawm cov xov yog tiaj tus, nrog lub zog zoo dua. Lub kaum sab xis kuj tseem yog 60 degrees, thiab cov lus qhia tshwj xeeb tau qhia hauv cov hniav ib nti. Cov xov no tuaj yeem muab faib ua peb qib: xov coarse (NC), xov zoo (NF), thiab xov ntxiv zoo (NEF). Cov ntawv sau xws li 1/2-10NC. (1/2: sab nraud; 10: hniav ib nti; NC code).
3. Unified Xov:
Kev sib koom ua ke los ntawm Tebchaws Meskas, United Kingdom, thiab Canada, nws yog cov xov xov uas siv ntau tshaj plaws tam sim no.
Lub kaum sab xis kuj tseem yog 60 degrees, thiab cov lus qhia tshwj xeeb tau qhia hauv cov hniav ib nti. Cov xov no tuaj yeem muab faib ua cov xov ntxhib (UNC); xov zoo (UNF); xov tooj zoo ntxiv (UNEF). Cov ntawv sau xws li 1/2-10UNC. (1/2: sab nraud; 10: hniav ib nti; UNC code)
4. V-shaped thread (Ntxhais V xov):
Ob sab saum toj thiab hauv paus yog taw tes, lub zog tsis muaj zog, thiab nws tsis siv ntau zaus. Lub kaum sab xis yog 60 degrees.
5. Whitworth Xov:
Cov xov tau txais los ntawm British National Standards. Lub kaum sab xis yog 55 degrees, thiab lub cim yog "W".
Haum rau dov txoj kev tsim. Cov ntawv sau xws li W1/2-10. (1/2: sab nraud; 10: hniav ib nti; W code).
6. Knuckle Xov:
Nws yog tus qauv xov teeb los ntawm German DIN. Nws yog qhov tsim nyog rau kev sib txuas ntawm lub teeb qhov muag teev thiab cov raj roj hmab. Lub cim yog "Rd".
7. Tube xov:
Txhawm rau tiv thaiv kom tsis txhob tawg, nws feem ntau yog siv los txuas cov roj av lossis cov kav dej ua kua. Lub kaum sab xis yog 55 degrees, uas tuaj yeem muab faib ua cov yeeb nkab ncaj cov lej "PS, NPS" thiab inclined yeeb nkab xov code "NPT", thiab nws taper yog 1: 16, uas yog, 3/4 nti ib ko taw.
8. Square Xov:
Kev sib kis tau zoo yog qhov siab, qhov thib ob tsuas yog lub pob xov, thiab nws tsis tuaj yeem hloov kho nrog cov txiv ntoo tom qab hnav thiab tsim kua muag, uas yog nws qhov tsis zoo. Feem ntau siv rau cov ntsia hlau ntawm lub vise thiab xov ntawm crane.
9. Cov xov Trapezoidal:
Kuj tseem hu ua Acme thread. Kev sib kis tau zoo yog me ntsis me dua ntawm cov xov xwm square, tab sis nws tuaj yeem hloov kho nrog cov txiv ntoo tom qab hnav. Lub kaum sab xis ntawm lub metric system yog 30 degrees, thiab xov lub kaum sab xis ntawm lub imperial system yog 29 degrees. Feem ntau siv rau cov ntsia hlau ntsia hlau ntawm lub tshuab dhos. Lub cim yog "Tr".
10. Xov Tooj:
Kuj hu ua oblique xov, nws tsuas yog haum rau kev sib kis ntawm ib txoj kev. Xws li cov ntsia hlau jacks, pressurizers, thiab lwm yam. Lub cim yog "Bu".
11. Pob xov:
Cov xov uas muaj kev sib kis tau zoo tshaj plaws yog qhov nyuaj rau kev tsim khoom thiab tus nqi yog siab heev, yog li nws yog siv nyob rau hauv precision machinery. Xws li cov hlau lead ntawm CNC tshuab cuab yeej.
