BSPT thiab BSP British Specification Taper Xov
NPT US specification taper xov
PT Nyiv tus qub JIS tus qauv taper xov, sib npaug rau ISO tus qauv R, Rc
DIN2999 European, feem ntau German yeeb nkab threads
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NPT
NPT yog lub hom phiaj dav dav Asmeskas tus qauv tapered yeeb nkab xov.
Ntawm lawv, N txhais tau tias National (American) American lub teb chaws tus qauv, P txhais tau tias PIPE yeeb nkab, T txhais tau tias TAPER taper, thiab cov hniav profile kaum sab xis yog 60 degree.
Hom yeeb nkab xov no feem ntau siv hauv North America lossis feem ntau pom siv ANSI specifications. Lub teb chaws tus qauv tuaj yeem pom hauv GB/T12716-1991
Kuv yuav tsum nco ntsoov: NPT cov hniav yuav tsum tau siv thaum ua ANSI specifications!
PT
PT xov yog ib tug imperial tapered xov nrog lub kaum sab xis ntawm 55 degree, uas yog feem ntau siv nyob rau hauv sealing. Nws yog feem ntau siv nyob rau hauv European thiab Commonwealth lub teb chaws. Qhov tseeb, Japanese JIS tus qauv hauv Taiwan kuj ua raws li tus qauv imperial, thiab Tuam Tshoj yeej tseem siv cov xov imperial. belongs rau Whitworth xov tsev neeg. Lub teb chaws tus qauv tuaj yeem pom hauv GB/T7306-2000.
British yeeb nkab threads yog zoo threads. Vim hais tias cov xov qhov tob ntawm cov xov ntxhib yog loj, nws yuav ua rau txo lub zog ntawm cov yeeb nkab sab nraud raug txiav.
Tsis tas li ntawd, NIPPLE feem ntau siv rau hauv cov kav dej me me. Lub hom phiaj yog tias phab ntsa tuab ntawm yuav NIPPLE 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. Qhov no yog kom txuag tau cov nqi.
PF xov yog cov xov sib txuas rau cov kav dej.
Kuv yuav tsum nco ntsoov: PT hniav, thiab lwm yam yuav tsum tau siv thaum ua JIS specifications!
G
G yog 55-degree tsis-threaded sealing yeeb nkab xov, uas belongs rau Whitworth xov tsev neeg. Marked G stands rau cylindrical xov. Lub teb chaws tus qauv tuaj yeem pom hauv GB/T7307-2001
G yog lub npe dav dav rau cov yeeb nkab xov (Guan). Kev faib tawm ntawm 55 thiab 60 degrees yog kev ua haujlwm thiab feem ntau hu ua cov voj voog yeeb nkab. 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 Rc
Metric threads yog qhia los ntawm suab, thiab American thiab British threads yog qhia los ntawm tus xov tooj ntawm threads ib nti. Qhov no yog lawv qhov sib txawv loj tshaj plaws. Metric threads yog 60-degree equilateral profile, British threads yog isosceles 55-degree profile, thiab American threads yog 60 degrees.
Metric threads siv metric units, thiab American thiab British threads siv imperial units.
Cov yeeb nkab threads yog siv los txuas cov kav dej. Cov xov sab hauv thiab sab nraud yog sib npaug zoo sib xws, thiab muaj ob hom: cov kav dej ncaj thiab cov kav dej tapered. Lub nominal txoj kab uas hla yog hais txog txoj kab uas hla ntawm cov yeeb nkab txuas. Obviously qhov loj txoj kab uas hla ntawm xov yog loj tshaj lub nominal txoj kab uas hla. 1/4, 1/2, thiab 1/8 yog cov nominal diameters ntawm nti threads hauv nti.
Kev txheeb xyuas ntawm inch uniform threads
Inch system unified threads yog dav siv nyob rau hauv nti system teb chaws. Hom xov no tau muab faib ua peb series: coarse xov series UNC, zoo xov series UNF, ntxiv zoo xov series UNFF, ntxiv rau ib tug ruaj pitch series UN.
Txoj kev cim: Xov txoj kab uas hla-ntau ntawm threads ib nti Series code-qhov tseeb
Piv txwv: Coarse tooth 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 pitch series 3/8-20 UN-2A
Thawj tus lej 3/8 sawv cev rau sab nraud ntawm cov xov hauv ntiv tes. Hloov mus rau metric unit Mm, muab 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 qib raug.
Hloov ntawm 55 degree cylindrical yeeb nkab xov
55 degree cylindrical yeeb nkab xov los ntawm cov ntiv tes series, tab sis yog dav siv nyob rau hauv ob qho tib si metric thiab nti lub teb chaws. Nws yog siv los txuas cov yeeb nkab sib txuas thiab cov kav dej rau kev thauj cov kua dej, roj av thiab txhim kho cov xov hlau. Txawm li cas los xij, cov lej ntawm cov teb chaws txawv txawv, yog li koj yuav tsum nias Cov lej txawv teb chaws hauv lub rooj (cov lus sib piv) hloov mus rau hauv Suav cov lej. 55 degree cylindrical yeeb nkab xov codes ntawm ntau lub teb chaws tam sim no tau teev nyob rau hauv cov lus hauv qab no.
Lub teb chaws chaws
Tuam Tshoj G
Japan G, PF
UK BSP, BSPP
Fabkis G
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 tapered yeeb nkab xov txhais tau hais tias cov xov profile lub kaum sab xis yog 55 degree thiab cov xov muaj taper ntawm 1:16. Cov xov no tau siv dav hauv ntiaj teb. Nws cov npe code sib txawv ntawm lub teb chaws mus rau lub teb chaws, raws li qhia nyob rau hauv cov lus hauv qab no. Hloov cov npe txawv teb chaws hauv lub rooj rau Suav code npe.
Lub teb chaws chaws
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)
Lub teb chaws Yelemees R (sab nraud xov)
Nyiv PT, R
ISO R (sab nraud xov), Rc (sab hauv xov)
Kev hloov pauv ntawm 60 degree tapered yeeb nkab xov
60 degree tapered 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 thiab lub tebchaws United States thiab lub qub Soviet Union. Nws lub npe code, peb lub teb chaws siv los qhia nws li K, tom qab ntawd teev nws li Z, thiab tam sim no nws tau hloov mus rau NPT. Saib cov xov tooj sib piv cov lus hauv qab no.
Lub teb chaws chaws
Tuam Tshoj Z ( qub) NPT (tshiab)
United States NPT
Soviet B
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 nyob hauv tsev thiab txawv teb chaws, thiab lawv cov lej kuj zoo ib yam. Cov kab lis kev cai yog qhia nyob rau hauv cov lus hauv qab no.
Lub teb chaws chaws
Tuam Tshoj T ( qub) Tr (tshiab)
ISO Tr
Lub teb chaws Yelemees TR
Yav tas los Soviet Union TR
Xov hom
Raws li kev siv cov xov sib txawv, lawv 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, thaum lub hauv qab ntawm cov hniav yog arc-puab los ua kom lub zog ntawm cov xov. Lub kaum sab xis yog 60 degrees, thiab cov lus qhia tshwj xeeb yog qhia hauv M. Metric threads tuaj yeem muab faib ua ob hom: xov coarse thiab xov zoo. Tus sawv cev yog raws li M8x1.25. (M: code, 8: nominal txoj kab uas hla, 1.25: suab).
2. American Standard Xov:
Sab saum toj thiab hauv paus ntawm cov xov yog ob qho tib si tiaj tus thiab muaj zog zoo dua. Lub kaum sab xis kuj tseem yog 60 degrees, thiab cov lus qhia tshwj xeeb tau qhia hauv xov ib nti. Cov xov zoo li no tuaj yeem muab faib ua peb theem: xov coarse (NC); xov zoo (NF); extra fine thread (NEF). Tus sawv cev yog xws li 1/2-10NC. (1/2: sab nraud; 10: naj npawb ntawm cov 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 British uas nquag siv.
Lub kaum sab xis kuj tseem yog 60 degrees, thiab cov lus qhia tshwj xeeb tau qhia hauv xov ib nti. Cov xov no tuaj yeem muab faib ua cov xov ntxhib (UNC); xov zoo (UNF); xov tooj zoo ntxiv (UNEF). Tus sawv cev yog xws li 1/2-10UNC. (1/2: sab nraud; 10: tus lej ntawm cov hniav ib nti; UNC code)
4. V-shaped thread (Ntxhais V xov):
Sab saum toj thiab cov hauv paus hniav yog ob qho tib si taw, tsis muaj zog hauv lub zog, thiab tsis siv ntau. Lub kaum sab xis yog 60 degrees.
5. Whitworth Xov:
Xov tau txais los ntawm British National Standard. Lub kaum sab xis yog 55 degrees, sawv cev los ntawm lub cim "W".
Haum rau dov manufacturing. Tus sawv cev yog W1/2-10. (1/2: sab nraud; 10: tus lej ntawm cov hniav ib nti; W code).
6. Knuckle Xov:
Nws yog tus qauv xov qhia los ntawm German DIN. Tsim nyog rau kev sib txuas cov teeb pom kev zoo thiab cov raj roj hmab. Lub cim yog "Rd".
7. Tube xov:
Cov xov uas siv los tiv thaiv kev xau feem ntau yog siv los txuas cov roj av lossis cov kav dej ua kua. Lub kaum sab xis yog 55 degrees thiab tuaj yeem muab faib ua cov yeeb nkab ncaj nraim codenamed "PS, NPS" thiab inclined yeeb nkab threads codenamed "NPT". 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 rau lub pob xov, tab sis nws qhov tsis zoo yog tias nws tsis tuaj yeem hloov kho nrog cov txiv ntoo tom qab hnav. Feem ntau siv rau cov ntsia hlau ntawm vise thiab xov ntawm crane.
9. Cov xov Trapezoidal:
Kuj tseem hu ua Acme thread. Kev sib kis tau zoo me ntsis qis 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 nyob rau hauv tshuab dhos txhuas screws. Lub cim yog "Tr".
10. Zigzag xov (Lub taub hau xov):
Kuj tseem hu ua rhombic xov, nws tsuas yog tsim 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:
Nws yog cov xov nrog qhov zoo tshaj plaws kis tau tus mob efficiency. Nws yog ib qho nyuaj rau kev tsim khoom thiab tsis tshua muaj nqi. Nws yog siv nyob rau hauv precision machinery. Xws li cov hlau lead ntawm CNC tshuab cuab yeej.
Sawv cev ntawm nti bolts:
LH 2N 5/8 × 3 - 13 UNC-2A
(1) LH yog xov sab laug (RH yog txoj cai xov, tuaj yeem tshem tawm).
(2) 2N ob npaug xov xov.
(3) 5/8 nti xov, 5/8 "txoj kab uas hla.
(4) 3 bolts 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: nruj haum; 2: nruab nrab haum; 1: xoob haum) A: xov sab nraud (tuaj yeem tshem tawm)
B: Internal xov
Imperial xov:
Qhov loj ntawm ntiv tes xov feem ntau yog qhia los ntawm cov xov tooj ntawm ib nti ntawm cov xov ntev, hu ua "tus naj npawb ntawm cov xov ib nti", uas yog raws nraim qhov sib txuam ntawm cov xov suab. Piv txwv li, ib tug xov nrog 8 threads ib nti muaj ib lub suab ntawm 1/8 nti.
