Thaum nws los txog rau lub ntiaj teb intricate ntawm hose thiab raj fittings, ntau yam xov hom muaj tuaj yeem yooj yim heev.Nws zoo li sawv hauv qhov kev tshawb fawb ntawm spirals, txhua tus nrog nws lub suab tshwj xeeb thiab qhov tob, xav tsis thoob tias txoj kev twg ua rau qhov haum zoo.Hauv tsab xov xwm no, Kuv zoo siab los nthuav tawm qhov paub tsis meej ntawm cov xov no rau koj.Peb mam li pib nrog cov lus qhia yooj yim rau cov xov yog dab tsi - cov spiral grooves tseem ceeb uas ua rau cov txiv ntseej, bolts, thiab fittings ua haujlwm hauv ntau lub tshuab thiab cov khoom siv niaj hnub.
Hauv kev taug kev no, peb yuav tshawb txog cov xov tseem ceeb, xws li BSPP, UN / UNF, thiab metric parallel threads, thiab delve rau hauv lub ntiaj teb ntawm cov xov tapered, suav nrog metric tapered, BSPT, thiab NPT / NPTF threads.Kev nkag siab txog cov no yuav pab koj ua qhov kev xaiv zoo tshaj plaws thiab tsim nyog, ua kom muaj kev ntseeg siab thiab tiv thaiv kev ua haujlwm tsis zoo hauv koj cov haujlwm.Yog li, cia peb pib ntawm txoj kev taug txuj kev nyuaj no thiab nrhiav qhov zoo meej haum rau koj cov kev xav tau!
Nkag siab Cov Xov Xwm: Lub hauv paus thiab qhov tseem ceeb
Thaum peb tham txog cov xov, peb tab tom xa mus rau cov qauv helical siv los hloov ntawm kev sib hloov thiab cov kab tawm los yog quab yuam.Xov muaj nyob txhua qhov chaw!Saib cov ntsia hlau tuav koj lub rooj ua ke, lub hau ntawm koj lub raj mis dej, lossis txawm tias lub teeb hauv koj lub teeb.Lawv txhua tus cia siab rau cov xov kom nyob hauv qhov chaw thiab ua haujlwm zoo.
Definition of Xov
Ib tug xov yog ib tug nruam ridge winding nyob ib ncig ntawm ib tug cylindrical los yog conical nto.Qhov kev tsim no tso cai rau cov khoom sib koom ua ke kom ruaj ntseg.Xav txog ib tug kauv staircase qhwv nyob ib ncig ntawm ib tug ncej-uas yog zoo li ib tug xov zoo li ntawm ib tug ntsia hlau los yog ntsia liaj qhov rooj.
Lub luag haujlwm ntawm Xov Xwm hauv Kev Siv Txhua Hnub
Cov xov yog qhov tseem ceeb vim tias lawv tau siv hauv ntau daim ntawv thov uas cuam tshuam rau peb lub neej txhua hnub.Lawv yog tus phab ej hauv qhov ntxoov ntxoo, ua kom txhua yam tsis poob.Nov yog vim li cas lawv thiaj li tseem ceeb:
l Tuav Cov Khoom Ua Ke : Los ntawm cov rooj tog mus rau cov tshuab, cov xov yog siv hauv cov xov fasteners xws li cov ntsia hlau thiab bolts kom cov khoom sib txuas nrog ib leeg.
l Kev tswj cov kua dej : Hauv kev lag luam ua kua hluav taws xob , cov xov xov kom ntseeg tau tias cov yeeb nkab thiab lub raj fittings tsis xau, uas yog qhov tseem ceeb rau cov tshuab uas thauj dej, roj, lossis roj.
l Precision hauv Devices : Hauv cov cuab yeej ua haujlwm siab, xws li hauv cov khoom siv kho mob, qhov tseeb ntawm cov xov loj tseem ceeb los xyuas kom muaj kev ua haujlwm zoo thiab kev nyab xeeb.
Hom Xov Hom
Muaj ntau ntau hom xov, txhua tus muaj lawv tus kheej cov kev siv tshwj xeeb thiab cov yam ntxwv.Nov yog qee qhov:
l American Pipe Threads : Cov no yog siv nyob rau hauv North America rau sealing yeeb nkab txuas.
l SAE Unified Threads : Ib qho qauv rau cov xov hlau uas nquag siv hauv kev lag luam tsheb.
l Metric ISO Xov : Ib txoj xov xov metric uas tau siv dav thoob ntiaj teb.
Xov xwm ID
Txhawm rau xaiv cov xov , koj yuav tsum paub qee qhov kev ntsuas tseem ceeb:
l Loj Txoj kab uas hla : Qhov loj tshaj plaws sab nraud txoj kab uas hla ntawm tus txiv neej xov.
l Me Txoj kab uas hla : Qhov tsawg tshaj plaws txoj kab uas hla, pom nyob rau hauv qab ntawm cov xov zawj.
l Pitch Diameter : Qhov no yog txoj kab uas hla ntawm ib lub tog raj kheej xav txog uas dhau los ntawm cov xov crests ntawm ib tug txiv neej xov thiab xov zawj ntawm ib tug poj niam xov.
Kev txheeb xyuas xov tuaj yeem ua kom yuam kev, tab sis cov cuab yeej zoo li lub ntsuas pitch tuaj yeem pab tau.Cov cuab yeej no ntsuas cov xov suab , uas yog qhov kev ncua deb ntawm ib lub xov crest mus rau lwm qhov hauv lub dav hlau axial.
Vim li cas Xov Geometry Matters
Lub geometric parameters ntawm ib lub xov txhais nws lub zog thiab kev ua haujlwm. Xov nta xws li lub kaum sab xis ntawm cov hniav thiab xov xov txiav txim siab seb cov xov yuav tuav tau zoo npaum li cas thiab lub zog npaum li cas nws tuaj yeem dais.Piv txwv li, ib tug ob-threaded ntsia hlau yuav nce mus txog ob zaug sai npaum li ib tug threaded ntsia hlau rau txhua qhov kev sib hloov, muab ib tug mechanical zoo..
Hom xov xwm nthuav dav
l Parallel xov thiab tapered xov yog ob pawg loj. Parallel threads tuav tib txoj kab uas hla thoob plaws, thaum tapered threads nqaim, uas yuav pab tsim cov seals nruj dua.
l Txoj Cai- Tes Xov yog feem ntau, qhov uas tig clockwise tightens cov xov. Sab laug-Hand threads tsis tshua muaj tshwm sim thiab nruj nyob rau hauv qhov sib txawv.
Kev nkag siab txog cov xov thiab lawv cov geometric tsis yog qhov tseem ceeb vim tias lawv yog cov tsev thaiv ntau nyob ib puag ncig peb.Los ntawm tuav ua ke ntawm cov khoom ua si me nyuam los ua kom muaj kev nyab xeeb ntawm lub dav hlau, xov ua lub luag haujlwm tseem ceeb hauv peb lub ntiaj teb.Raws li peb delve rau hauv qhov tshwj xeeb ntawm cov xov tsim , nco ntsoov tias cov spirals me me no muaj zog hauv lawv qhov tseem ceeb.
Kev faib cov xov
Mounting vs. Transmission vs. Transport Threads
Thaum tham txog hom xov , nws yog ib qho tseem ceeb kom nkag siab txog lawv cov haujlwm tseem ceeb.
Mounting threads feem ntau yog siv los tiv thaiv cov khoom ua ke.Xav txog cov screws ntawm lub rooj plaub hauv computer;lawv tau tsim los tuav cov khoom hauv qhov chaw.
Kev sib kis xov , ntawm qhov tod tes, yog ib qho tseem ceeb hauv cov tshuab xa hluav taws xob.Cov xov no muaj nyob rau hauv cov hlau lead screws ntawm cov cav tov, qhov twg lawv cov geometry tso cai rau kev hloov pauv ntawm kev sib hloov mus rau hauv cov lus tsa suab.
Kev thauj xov yog txawv me ntsis.Lawv ua lub luag haujlwm tseem ceeb hauv kev lag luam kua hluav taws xob .Cov xov no yog tsim los tsim ib lub foob nyob rau hauv cov yeeb nkab thiab cov yeeb nkab fittings , ua kom muaj kev nyab xeeb thiab kev thauj mus los ntawm cov kua lossis cov pa roj.Txhua hom xov yog tsim los rau nws lub hom phiaj tshwj xeeb, thiab kev txheeb xyuas xov yog qhov tseem ceeb hauv cov ntawv thov kom ntseeg tau tias muaj kev sib raug zoo thiab ua haujlwm.
Txoj Cai-Hand (RH) thiab Left-Hand (LH) Xov Xwm: Kev Sib Tw thiab Kev Siv
Cov xov tuaj yeem raug cais raws li Txoj Cai Lij Choj (RH) threads lossis Left-Hand (LH) xov .Qhov sib txawv yog qhov yooj yim tab sis tseem ceeb heev. RH threads nruj clockwise, uas yog tus qauv kev taw qhia rau feem ntau xov fasteners .Yuav luag txhua tus ntsia hlau lossis ntsia liaj qhov rooj uas koj ntsib yuav muaj RH xov. LH threads , ntawm qhov tod tes, nruj counterclockwise thiab tsis tshua muaj.Lawv siv nyob rau hauv cov xwm txheej uas lub zog sib hloov yuav ua rau RH xov kom loosen, xws li sab laug ntawm lub tsheb kauj vab pedal.
l Txoj Cai-tes :
¡ Tight clockwise
¡ Feem ntau cov ntsia hlau xov siv
l Sab laug- Tes Xov :
Tighten counterclockwise
¡ Cov ntawv thov tshwj xeeb los tiv thaiv kev xoob
Yeeb Nkab Xov: Cov yam ntxwv thiab kev siv
Cov yeeb nkab xov tuaj nyob rau hauv ob hom: tapered thread thiab parallel thread . Tapered threads , zoo li National Taper Pipe (NPT) , yog tsim los tsim ib lub foob los ntawm cov xov lawv tus kheej.Raws li cov txiv neej thiab poj niam threads raug nruj, lawv tsim ib lub foob vim qhov cuam tshuam haum.Qhov no ua rau lawv zoo tagnrho rau cov ntawv thov uas muaj cov pa roj lossis cov kua dej hauv lub siab.
Parallel threads , xws li British Standard Pipe Parallel (BSPP) , yuav tsum muaj tus neeg sawv cev sib khi, zoo li lub tshuab ntxhua khaub ncaws lossis O-ring, kom ntseeg tau tias muaj kev sib txuas ntawm cov dej.Lawv feem ntau siv rau hauv cov ntawv thov siab qis thiab qhov chaw sib txuas yuav tsum tau sib sau ua ke thiab disassembled nquag.
l Tapered Xov :
National Taper Yeeb Nkab (NPT)
Sealing tiav los ntawm kev cuam tshuam xov
Siv nyob rau hauv high-pressure systems
l Parallel Xov :
British Standard Pipe Parallel (BSPP)
Yuav tsum tau muab cov khoom sib khi ntxiv
Haum rau nquag sib dhos / disassembly
T hread loj teeb meem thiab nws yog ib qho tseem ceeb uas yuav tsum tau xaiv cov xov hom kom raug los xyuas kom meej qhov kev sib txuas.Txawm hais tias ua haujlwm nrog American Pipe Threads , SAE Unified Threads , lossis Metric ISO xov , txoj kev txheeb xyuas txoj xov zoo yog qhov tseem ceeb.Cov cuab yeej zoo li lub ntsuas pitch thiab caliper tuaj yeem pab hauv cov txheej txheem no, ua raws li cov qauv kev lag luam rau lub npe loj profile thiab ua kom cov xov zoo tsim rau daim ntawv thov.
ISO Xov Hom
ISO Metric Xov (M): Nta thiab daim ntawv thov
ISO metric xov, feem ntau hu ua M , yog hom xov thoob ntiaj teb .Siv thoob ntiaj teb, nws yog cov qauv txheem xov rau lub hom phiaj dav dav.Lub suab txoj kab uas hla thiab txoj kab uas hla loj yog cov yam ntxwv tseem ceeb ntawm cov xov no . Metric threads yog nrov vim lawv txoj kev yooj yim thiab yooj yim ntawm kev txheeb xyuas xov.
Cov ntawv thov suav nrog: - Machinery - Automotive kev lag luam - Cov khoom siv
Metric threads muab qhov sib npaug ntawm lub zog thiab ntau yam, ua rau lawv yog ib qho ntawm cov xov tseem ceeb hauv kev tsim khoom.
ISO Metric Fine Thread (MF): Nkag siab qhov sib txawv
ISO metric nplua xov , lossis MF , txawv ntawm tus qauv M xov hauv nws lub suab .Lub suab yog finer, uas txhais tau hais tias cov threads nyob ze ua ke.Qhov no ua rau ntau dua xov suav rau ib chav tsev ntev.Cov xov zoo muab kev tswj nruj dua thiab yog qhov zoo rau cov ntawv thov uas yuav tsum muaj siab precision.
Qhov sib txawv tseem ceeb muaj xws li: - suab me me - Tighter thread size - Ntau zog nyob rau hauv tapped qhov
Metric fine threads feem ntau yog siv nyob rau hauv cov kua-lub zog kev lag luam thiab nyob rau hauv daim ntawv thov uas yuav tsum tau kev kho kom zoo.
Steel Conduit Xov (Pg): Keeb kwm thiab kev siv tam sim no
Cov hlau txuas xov , hu ua Pg , muaj qhov tseem ceeb hauv keeb kwm.Nws originated nyob rau hauv lub teb chaws Yelemees thiab tau dav siv thoob plaws teb chaws Europe rau hluav taws xob conduit fittings.Niaj hnub no, Pg threads muaj cov ntawv thov tshwj xeeb hauv kev lag luam hluav taws xob, ua kom muaj kev ruaj ntseg thiab txhim khu kev qha.
Kev siv tam sim no suav nrog: - Hluav taws xob fittings - Conduit systems - Instrumentation
Txawm hais tias qhov nce hauv ntau hom Pg xov , tseem cuam tshuam vim kev lag luam cov qauv thiab cov txheej txheem qub qub.
Trapezoidal Xov (Tr): Tsim thiab Ua Haujlwm
Trapezoidal xov , xaiv raws li Tr , yog tus cwj pwm los ntawm nws cov hniav trapezoidal.Qhov kev tsim no muaj qhov zoo ntawm cov khoom siv zoo , ua rau nws haum rau cov khoom hnyav thiab cov hlau lead hauv cov tshuab.
Cov haujlwm muaj xws li: - Kev xa hluav taws xob - Kev hloov pauv ntawm kev sib hloov mus rau cov kab tawm - Siv rau hauv vises thiab jacks
Cov xov trapezoidal yog ib hom xov zoo hauv kev tsim cov tshuab tsav.Nws cov geometry tso cai rau kev faib cov khoom thauj thoob plaws thaj tsam loj, txhim kho cov xov ntev thiab lub neej ntev.
Thoob plaws hauv ntu no, peb tau kov ntawm ISO xov hom xws li metric ISO xov , ISO metric nplua xov , thiab lwm yam.Nws yog ib qho tseem ceeb kom xaiv cov xov kom raug rau daim ntawv thov, raws li xov loj tseem ceeb .Cov cuab yeej zoo li lub suab ntsuas thiab caliper yog qhov tseem ceeb rau cov txheej txheem kev txheeb xyuas xov , kom ntseeg tau tias muaj kev sib raug zoo thiab kev ua haujlwm hauv cov xov xov..
American Xov Hom
Unified National Coarse Thread (UNC): Kev Pom Zoo
Thaum peb tham txog American xov hom , Unified National Coarse Thread , los yog UNC , yog ib qho tseem ceeb xov hom .Nws yog tus qauv uas txhais cov qauv helical rau xov fasteners .UNC . paub txog nws lub suab uas dav dua li lwm hom, ua rau nws haum rau kev siv ntau yam khoom siv Xov loj tseem ceeb ntawm no, thiab UNC tus qauv tsim ua rau nws tsis tshua muaj kev hla xov thiab yooj yim rau kev daws.
Unified National Fine Thread (UNF): Specifications and Uses
Ntawm qhov tod tes, Unified National Fine Thread lossis UNF muaj lub suab me me .Qhov no txhais tau hais tias cov xov nyob ze ua ke.UNF feem ntau siv thaum xav tau ntau dua ntawm lub zog thiab qhov tseeb.Nws yog ib txwm muaj nyob rau hauv kev lag luam kua-lub hwj chim vim hais tias cov finer threads muab ib tug ntau ruaj ntseg thiab tighter haum.Nws yog ib qho tseem ceeb los xaiv cov xov kom zoo thaum ua haujlwm nrog UNF kom ntseeg tau tias muaj kev sib raug zoo thiab kev ua haujlwm.
Unified National Special Thread (UNS): Cov yam ntxwv tshwj xeeb
Unified National Special Thread lossis UNS yog lwm hom xov xwm Asmeskas uas sawv tawm vim nws qhov tshwj xeeb customization. UNS tsis yog raws li tus qauv raws li UNC lossis UNF , tso cai rau kev hloov pauv hauv xov suab thiab txoj kab uas hla.Qhov kev hloov pauv no ua rau UNS mus rau cov ntawv thov tshwj xeeb uas cov xov xov loj tsis txaus. Kev txheeb xyuas xov rau UNS xav tau kev ntsuas meej, feem ntau siv lub suab ntsuas los yog caliper.
National Taper Pipe Threads (NPT thiab NPTF)
| Dash Size (Nominal Size) | Xov Pitch | Txiv neej Xov OD mm | Txiv neej Xov OD ntiv tes | Poj Niam Xov ID mm | Poj Niam Xov ID ntiv tes |
| -02 (1/8) | 27 | 10.3 | 0.41 | 9.4 | 0.37 |
| -04 (1/4) | 18 | 13.7 | 0.54 | 12.4 | 0.49 |
| -06 (3/8) | 18 | 17.3 | 0.68 | 15.7 | 0.62 |
| -08 (1/2) | 14 | 21.3 | 0.84 | 19.3 | 0.76 |
| -10 (5/8) | 14 | 22.9 | 0.90 | 21.1 | 0.83 |
| -12 (3/4) | 14 | 26.9 | 1.06 | 24.9 | 0.98 |
| -16 (1) | 11 ½ | 33.3 | 1.31 | 31.5 | 1.24 |
| -20 (1 ¼) | 11 ½ | 42.2 | 1.66 | 40.1 | 1.58 |
| -24 (1 ½) | 11 ½ | 48.3 | 1.90 | 46.2 | 1.82 |
| -32 (2) | 11 ½ | 60.4 | 2.38 | 57.9 | 2.29 |
**OD = Sab Nraud Diameter ID = Sab hauv Dia
Tsiv mus rau American Pipe Threads , National Taper Pipe Threads yog qhov tseem ceeb.Muaj ob hom tseem ceeb: NPT thiab NPTF .Ob leeg yog tapered xov hom uas txhais tau hais tias lawv tsim ib lub foob thaum lawv nruj. NPT , lossis National Taper Pipe , yog ib txwm muaj thiab xav tau cov neeg ua haujlwm sib khi ntxiv. NPTF , los yog National Taper Pipe Dryseal , yog tsim los tsim ib lub foob tsis muaj cov ntaub ntawv ntxiv. NPT thiab NPTF yog qhov tseem ceeb hauv kev lag luam kua hluav taws xob rau hose fittings , tube fittings , thiab cov yeeb nkab txuas.Xov pitch gauge yog ib qho cuab yeej tseem ceeb rau cov txheej txheem xov tooj hauv NPT thiab NPTF systems.
Nkag siab txog no cov xov xwm Asmeskas yog qhov tseem ceeb rau cov kws tshaj lij hauv ntau qhov kev lag luam. SAE Unified Threads , suav nrog UNC , UNF , thiab UNS , nrog rau NPT thiab NPTF , ua lub luag haujlwm tseem ceeb hauv kev tsim cov threaded fasteners thiab haum kev sib txuas .zoo Kev txheeb xyuas cov xov kom ntseeg tau tias cov khoom sib haum xeeb ruaj ntseg thiab ua haujlwm raws li qhov xav tau.
British Whitworth Xov Xwm
British Standard Whitworth Coarse (BSW/WW)
Lub British Standard Whitworth Coarse (BSW) , feem ntau hu ua WW rau Whitworth, yog cov xov xwm nrog keeb kwm nplua nuj.Nws yog lub ntiaj teb thawj tus qauv ntsia hlau xov system, tsim los ntawm Joseph Whitworth nyob rau hauv 1841. Tus tsim yog revolutionary, teem ib tug qauv rau xov fasteners nyob rau hauv lub British Empire thiab tshaj.Cov xov Whitworth tau dhau los ua ib qho tseem ceeb tshaj plaws ntawm cov xov xov , uas muaj 55-degree xov lub kaum ntse ntse thiab cov kab sib npaug thiab cov hauv paus hniav.Cov xov xwm keeb kwm no tau tso lub hauv paus rau ntau hom xov uas peb pom niaj hnub no.
British Standard Fine (BSF)
Tsiv mus rau British Standard Fine (BSF) , hom xov no yog qhov tseem ceeb tshaj plaws ntawm BSW.Nrog rau lub suab me me , uas yog qhov kev ncua deb ntawm cov xov uas nyob ib sab , BSF tau tsim los muab qib siab dua ntawm qhov tseeb thiab lub zog hauv cov ntawv thov uas cov xov loj tseem ceeb .Txoj kab uas hla loj tseem zoo ib yam li BSW, tab sis lub suab zoo dua tso cai rau ntau cov xov hauv ib nti, uas txhais tau tias nruj dua, ruaj ntseg haum. BSF feem ntau siv hauv kev lag luam tsheb, qhov twg precision yog qhov tseem ceeb.
British Standard Pipe (BSP/G)
| Dash Size (Nominal Size) | Xov Pitch | Txiv neej Xov OD mm | Txiv neej Xov OD ntiv tes | Poj Niam Xov ID mm | Poj Niam Xov ID ntiv tes |
| -02 (1/8) | 28 | 9.7 | 0.38 | 8.9 | 0.35 |
| -04 (1/4) | 19 | 13.2 | 0.52 | 11.9 | 0.47 |
| -06 (3/8) | 19 | 16.5 | 0.65 | 15.2 | 0.60 |
| -08 (1/2) | 14 | 20.8 | 0.82 | 19.1 | 0.75 |
| -10 (5/8) | 14 | 22.4 | 0.88 | 20.3 | 0.80 |
| -12 (3/4) | 14 | 26.4 | 1.04 | 24.6 | 0.97 |
| -16 (1) | 11 | 33.0 | 1.30 | 31.0 | 1.22 |
| -20 (1 ¼) | 11 | 41.9 | 1.65 | 39.6 | 1.56 |
| -24 (1 ½) | 11 | 47.8 | 1.88 | 45.5 | 1.79 |
| -32 (2) | 11 | 59.7 | 2.35 | 57.4 | 2.26 |
British Standard Pipe (BSP) , tseem hu ua G , yog ib hom kab sib txuas xov uas feem ntau siv hauv kev lag luam kua hluav taws xob .Tsis zoo li taper threads, BSP threads tuav tib txoj kab uas hla los ntawm qhov kawg mus rau qhov kawg, ua rau lawv sib npaug threads .Qhov kev tsim no yog qhov tseem ceeb rau cov hose fittings thiab tube fittings , qhov twg yuav tsum muaj kev sib khi zoo ib yam .BSP feem ntau piv nrog American Pipe Threads , tab sis lawv tsis hloov pauv vim qhov sib txawv ntawm cov ntawv xov thiab suab.
British Standard Pipe Taper (BSPT / R)
| BSP Xov Loj | Sab Nrauv | TPI |
| 1/16 Nti BSP | 7.7 hli / 0.304 ' | 28 |
| 1/8 Nti BSP | 9.7 hli / 0.383 ' | 28 |
| 1/4 Nti BSP | 13.16 hli / 0.518 ' | 19 |
| 3/8 Nti BSP | 16.66 hli / 0.656 ' | 19 |
| 1/2 Nti BSP | 20.99 hli / 0.825 ' | 14 |
| 5/8 Nti BSP | 22.99 hli / 0.902 ' | 14 |
| 3/4 Nti BSP | 26.44 hli / 1.041 ' | 14 |
| 7/8 Nti BSP | 30.20 hli / 1.189 ' | 14 |
| 1 Inch BSP | 33.25 hli / 1.309 ' | 11 |
| 1-1/4 Nti BSP | 41.91 hli / 1.650 ' | 11 |
| 1-1/2 Nti BSP | 47.80 hli / 1.882 ' | 11 |
| 2 Nti BSP | 59.61 hli / 2.347 ' | 11 |
| 2-1/4 Nti BSP | 65.71 hli / 2.587 ' | 11 |
| 2-1/2 Nti BSP | 75.18 hli / 2.96 ' | 11 |
| 3 Nti BSP | 87.88 hli / 3.46 ' | 11 |
| 4 Nti BSP | 113.03 hli / 4.45 ' | 11 |
| 5 Nti BSP | 138.43 hli / 5.45 ' | 11 |
| 6 Nti BSP | 163.83 hli / 6.45 ' | 11 |
Thaum kawg, British Standard Pipe Taper (BSPT) , lees paub tias yog R , yog ib txoj hlua khi siv hauv ntau cov yeeb nkab sib txuas.Lub taper tsim ib lub foob los ntawm kev yuam cov xov ntawm cov txiv neej xov rau hauv cov poj niam xov , tso cai rau cov kua dej nruj.BSPT yog qhov tshwj xeeb tshaj yog nyob rau hauv kev lag luam kua hluav taws xob , qhov twg kev tiv thaiv dej yog qhov tseem ceeb.Lub kaum sab xis kom ntseeg tau tias txhua txoj xov nruj rau hauv qhov txuas ntxiv, muab kev sib txuas txhim khu kev qha rau cov yeeb nkab , raj , thiab kev sib txuas haum..
Nyob rau hauv txhua qhov ntawm British Whitworth threads , xov xov qhia yog qhov tseem ceeb.Cov cuab yeej zoo li lub ntsuas pitch lossis caliper feem ntau siv los xaiv cov xov hom thiab qhov loj me.To taub cov geometric parameters ntawm cov xov no, los ntawm loj txoj kab uas hla mus rau pitch txoj kab uas hla , yog ib qho tseem ceeb los xyuas kom meej compatibility thiab functionality nyob rau hauv threaded assemblies.Txawm tias nyob rau hauv keeb kwm machinery los yog niaj hnub daim ntawv thov, British Standard Threads tseem yog ib qho tseem ceeb rau ntau yam industries, sawv nrog rau lwm yam xov tseem ceeb xws li ISO xov hom , Metric ISO xov , thiab American xov hom.
Yeeb Nkab Xov
Nkag siab txog cov yeeb nkab xov hauv cov kav dej thiab cov khoom siv roj
Cov yeeb nkab xov yog ib qho tseem ceeb hauv kev ua kom muaj kev sib txuas ntawm cov kav dej thiab cov pa roj.Lawv ua haujlwm tseem ceeb hauv kev koom nrog cov kav dej, li qub, thiab fittings ruaj ntseg. Xov loj tseem ceeb hauv cov ntawv thov no, vim tias nws yuav tsum ua kom haum raws li tus nqi ntws thiab qhov xav tau ntawm lub kaw lus.
Tapered vs. Conical yeeb nkab xov
Thaum peb tham txog cov yeeb nkab xov , peb feem ntau xa mus rau ob hom: tapered thread thiab conical thread .Cov xov tapered , tseem hu ua National Taper Pipe (NPT) , maj mam txo qis hauv txoj kab uas hla ntawm ib kawg, muab lub foob kaw ntom nti raws li cov xov txuas. Conical threads zoo sib xws tab sis muaj lub khob me me, ntxiv dag zog rau kev sib txuas.
Tapered yeeb nkab threads yog feem ntau siv nyob rau hauv cov dej-power kev lag luam .Lawv tsim ib lub foob los ntawm kev cuam tshuam ntawm cov xov. Cov yeeb nkab dope lossis Teflon daim kab xev feem ntau ua raws li cov khoom sib khi kom ntseeg tau tias tsis muaj kev sib txuas.
Hloov pauv, conical yeeb nkab threads tsis tshua muaj tab sis tseem ceeb heev.Lawv feem ntau pom muaj nyob rau hauv cov ntawv thov tshwj xeeb uas lub siab thiab lub zog xav tau ntau dua.
Kev txheeb xyuas cov yeeb nkab xov
Kev txheeb xyuas xov yog qhov tseem ceeb hauv kev saib xyuas thiab sib dhos ntawm cov kav dej.Lub suab ntsuas los yog caliper tuaj yeem siv los txheeb xyuas cov xov hom thiab qhov loj me.Piv txwv li, American Pipe Threads thiab SAE Unified Threads yog hom xov uas muaj cov yam ntxwv sib txawv.
American xov hom zoo li NPT yog dav siv thoob plaws North America.Lawv ua raws li Txoj Cai Kev Sib Koom Tes , uas suav nrog Unified National Coarse Thread (UNC) thiab Unified National Fine Thread (UNF).
British Standard Pipe Taper (BSPT) thiab British Standard Whitworth (BSW) threads, nrog rau British Standard Whitworth Coarse (BSWC) , yog British xov hom uas muaj kev siv tshwj xeeb, tshwj xeeb tshaj yog nyob rau hauv lub tebchaws United Kingdom thiab Commonwealth lub teb chaws.
Xov Parameters thiab cov cuab yeej
Lub pitch diameter ntawm cov yeeb nkab xov yog ib qho kev ntsuas tseem ceeb.Nws yog txoj kab uas hla ntawm lub tog raj kheej xav txog qhov twg cov xov thickness yog sib npaug ntawm qhov chaw xov .Rau kev ntsuas kom raug, lub suab ntsuas los yog caliper yog siv.
Txiv neej threads thiab poj niam threads yog cov ntsiab lus siv los piav txog cov xov sab nraud thiab cov xov sab hauv , feem. Txiv neej threads muaj nyob rau sab nraum cov kav dej los yog fittings, thaum poj niam threads nyob rau hauv.
Txoj cai-tes threads yog tus qauv hauv kev lag luam, qhov twg cov xov nruj clockwise. Sab laug-tes threads tsis tshua muaj thiab nruj counterclockwise.
Tswv yim tswv yim rau kev xaiv cov yeeb nkab xov
l Ib txwm siv lub suab ntsuas kom paub meej cov xov suab thiab txoj kab uas hla.
l Xyuas kom meej tias cov xov tapered raug kaw txaus nrog tus neeg sawv cev sealing.
l Rau cov ntawv siv high-pressure, xav txog cov xov conical rau lawv lub zog txhim kho.
l Paub txog cov qauv kev lag luam rau hom kev teeb tsa tshwj xeeb uas koj tab tom ua haujlwm.
l Siv cov txheej txheem txheeb xyuas xov kom raug los tiv thaiv kev sib txuas tsis sib haum.
Kev nkag siab txog qhov sib txawv ntawm tapered thiab conical yeeb nkab threads yog qhov tseem ceeb rau txhua tus neeg hauv cov kav dej lossis roj av.kom raug Kev txheeb xyuas cov xov tooj thiab xaiv tuaj yeem tiv thaiv kev xau, ua kom muaj kev ncaj ncees, thiab tswj cov qauv kev nyab xeeb hauv cov ntawv thov tseem ceeb no.
Advanced Thread Types
Thaum nws los txog rau hom xov, peb feem ntau paub txog ntau yam uas peb ntsib hauv cov khoom niaj hnub xws li bolts thiab txiv ntoo.Txawm li cas los xij, muaj lub ntiaj teb ntawm ntau txoj xov xov uas ua lub luag haujlwm tseem ceeb hauv ntau qhov kev lag luam.Cia peb dhia mus rau qee yam ntawm cov xov zoo tshaj no thiab lawv cov ntawv tshwj xeeb.
Acme Xov
Acme threads paub txog lawv cov duab trapezoidal, ua rau lawv muaj zog thiab zoo dua rau cov khoom hnyav dua li cov ntsia hlau ntau dua .Lawv feem ntau pom nyob rau hauv cov khoom xws li vices thiab jacks qhov twg lub zog thiab kav ntev yog qhov tseem ceeb.
Knuckle Xov
Knuckle threads yog qhov tshwj xeeb nrog lawv cov kab sib npaug thiab cov hauv paus hniav.Lawv feem ntau siv nyob rau hauv ib puag ncig uas cov xov yuav raug cuam tshuam rau kev tuav tsis zoo lossis xav tau kom huv tau yooj yim, xws li hauv kev lag luam khoom noj thiab dej haus..
Buttress Xov
Buttress threads muaj cov qauv tsim uas tso cai rau kev hloov mus rau hauv ib qho kev taw qhia.Lawv yog cov mus-rau xov rau cov ntawv thov xws li nias qhov twg koj xav tau cov xov los tuav ntau lub zog hauv txoj kab ncaj nraim.
Kab Kab
Worm threads yog qhov tseem ceeb hauv cov kab ke uas qhov kev hloov pauv yuav tsum tau hloov mus rau hauv ib qho linear.Lawv yog cov khoom tseem ceeb hauv cov tshuab iav, xws li cov uas pom nyob rau hauv cov cuab yeej tuning lossis elevator.
Cov ntawv thov tshwj xeeb
Txhua hom xov zoo ua haujlwm rau lub hom phiaj tshwj xeeb, feem ntau haum rau cov kev xav tau ntawm kev lag luam tshwj xeeb.
l Acme threads tsis yog muaj zog xwb;lawv kuj muab precision, ua rau lawv zoo tagnrho rau cov kua-lub zog kev lag luam.
l Knuckle threads, nrog lawv lub peev xwm los tiv thaiv kev puas tsuaj, yog qhov tseem ceeb hauv kev ua liaj ua teb uas cov tshuab ntsib qhov hnyav.
l Buttress threads yog qhov tseem ceeb hauv cov khoom siv hlau vim lawv muaj peev xwm tiv taus siab axial thrust.
l Cov kab laum yog cov pob txha ntawm kev tswj cov lus tsa suab , ua lub luag haujlwm tseem ceeb hauv cov haujlwm xws li tsheb thiab aerospace.
Kev lag luam qhov twg cov xov no tseem ceeb heev
Advanced thread hom tsis yog hais txog kev ua haujlwm xwb;lawv yog hais txog precision thiab kev ntseeg siab nyob rau hauv high-stakes ib puag ncig.
l Kev lag luam aviation tso siab rau cov xov tshwj xeeb no rau kev nyab xeeb thiab kev ua haujlwm ntawm cov khoom siv dav hlau.
l Hauv kev lag luam marine , kev ua haujlwm ntev ntawm cov xov no yog qhov tseem ceeb rau kev tiv thaiv corrosive dej ntsev ib puag ncig.
l Cov chaw kho mob siv cov xov zoo tshaj plaws hauv cov cuab yeej cawm txoj sia, qhov tsis ua haujlwm tsis yog qhov kev xaiv.
l Lub zog sector nyob ntawm cov xov no rau kev saib xyuas thiab kev ua haujlwm ntawm cov tshuab hnyav.
Thaum cov xov hom xws li ISO metric xov lossis American Pipe Threads paub zoo, nws yog cov xov zoo tshaj plaws uas feem ntau coj qhov teeb meem hauv cov ntawv tshwj xeeb. Xov loj tseem ceeb , thiab yog li hom xov siv.Txawm hais tias nws yog Acme xov nyob rau hauv lub tshuab dhos los yog ib tug Worm xov nyob rau hauv lub gearbox, kev nkag siab txog cov xov tseem ceeb no yog qhov tseem ceeb rau engineers thiab cov kws tshaj lij thoob plaws kev lag luam.Xaiv cov xov zoo - yog nws cov xov sib txuas lossis cov xov tapered - tuaj yeem ua rau txhua qhov sib txawv hauv kev ua haujlwm thiab kev ua haujlwm ntev ntawm threaded qhov chaw.
Geometric Parameters ntawm Xov
Kev nkag siab txog geometric parameters ntawm threads yog qhov tseem ceeb rau txhua tus neeg ua haujlwm nrog threaded qhov chaw .Txawm hais tias koj nyob hauv kev lag luam kua hluav taws xob lossis cuam tshuam nrog cov xov fasteners , paub txog cov kev txwv no ua kom muaj kev sib raug zoo thiab kev ua haujlwm.
Loj thiab me kab
Txoj kab uas hla loj yog hais txog cov khoom siv loj tshaj plaws ntawm cov ntsia hlau xov .Nws yog lub sab nraud ntawm ib tug txiv neej xov los yog qhov loj tshaj txoj kab uas hla ntawm ib tug poj niam xov .Hloov pauv, qhov me me txoj kab uas hla yog qhov tsawg tshaj plaws txoj kab uas hla ntawm cov xov.Nws yog txoj kab uas hla ntawm ib lub tog raj kheej xav txog uas tsuas yog kov cov xov crests ntawm ib qho xov sab nraud los yog cov xov zawj ntawm ib qho xov . hauv xov loj tseem ceeb ;Yog li ntawd, kom tau txais cov diameters zoo yog qhov tseem ceeb.
Pitch Diameter thiab nws qhov tseem ceeb
Lub suab diam yog ib qho tseem ceeb parameter uas nyob nruab nrab ntawm qhov loj thiab me diameters.Nws yog txoj kab uas hla ntawm ib qho kev xav co-axial lub tog raj kheej uas qhov kev ncua deb ntawm lub suab txoj kab uas hla cuam tshuam ntawm ib sab mus rau cov xov suab ntawm sab nraud yog sib npaug.Lub suab txoj kab uas hla yog qhov tseem ceeb vim nws pab xaiv cov xov thiab xyuas kom muaj kev sib txuas kom haum.
Xov Pitch thiab nws cov ntawv thov
Xov pitch yog qhov kev ncua deb ntawm ob qhov chaw nyob ib sab ntawm cov xov hauv lub dav hlau axial .Nws yog ib qho kev ntsuas ncaj qha ntawm cov xov tooj ntawm cov xov hauv ib chav tsev ntev thiab tseem ceeb heev rau kev txheeb xyuas xov .Nyob rau hauv lub metric system , suab yog txhais nyob rau hauv millimeters, thaum nyob rau hauv imperial unit-raws li systems xws li SAE Unified Threads los yog American Pipe Threads , nws yog qhia raws li tus naj npawb ntawm threads ib nti. Pitch gauges feem ntau siv los ntsuas qhov ntsuas no kom raug.
To taub Xov Tooj
Lead yog qhov kev ncua deb ntawm cov xov hlau mus raws nws axis nrog ib qho kev sib hloov ua tiav.Rau ib txoj hlua ib leeg, cov hlau lead yog tib yam li lub suab.Txawm li cas los xij, rau ob txoj hlua khi , cov hlau lead yog ob zaug lub suab.Lub tswv yim no yog qhov tseem ceeb rau cov ntawv thov uas xav tau kev siv tshuab kom zoo dua.
Hniav Angle thiab Threaded Angle
Lub kaum sab xis ntawm cov hniav , tseem hu ua lub kaum sab xis , yog lub kaum sab xis ntawm cov xov sab .Ntau hom xov zoo li Metric ISO xov , British Whitworth threads , los yog Unified xov txheem muaj qhov sib txawv ntawm cov qauv.Piv txwv li, metric threads feem ntau muaj 60-degree lub kaum ntse ntse, thaum British Standard Whitworth Coarse threads muaj 55-degree kaum.Cov hniav thiab lub kaum sab xis cuam tshuam cov xov geometry thiab nws lub zog.
Cov geometric tsis xws li loj txoj kab uas hla , me me txoj kab uas hla , pitch txoj kab uas hla , xov suab , thiab cov hniav lub kaum sab xis ua lub luag haujlwm tseem ceeb hauv xov tsim .Cov kev txwv no yog siv thoob plaws ntau hom xov, suav nrog cov xov kab sib txuas , tapered xov , ISO xov hom , thiab American xov hom .Kev nkag siab zoo thiab ntsuas ntawm cov kev txwv no siv cov cuab yeej xws li calipers thiab pitch gauges yog qhov tseem ceeb rau kev ua kom cov xov tooj raug txheeb xyuas cov txheej txheem thiab kev sib raug zoo hauv cov fittings xws li hose fittings , yeeb nkab , thiab raj fittings .Nco ntsoov, nyob rau hauv lub ntiaj teb no ntawm threads , precision yog qhov tseem ceeb.
Kauj ruam-by-Step Guide to Thread Identification
Kauj Ruam 1: Qhov txawv ntawm cov kab sib luag thiab cov kab sib txuas
Thaum ua haujlwm nrog cov xov , nws yog ib qho tseem ceeb kom paub yog tias koj ua haujlwm nrog cov kab sib txuas lossis cov xov sib txuas . Parallel threads tuav tib txoj kab uas hla kawg-rau-kawg, thaum tapered threads nqaim, tau me me mus rau qhov kawg.Qhia rau lawv sib nrug, saib ze ze. Parallel threads yuav tshwm sim, thaum tapered threads yuav zoo li converge.
Rau kev ua kom zoo, siv lub caliper .Ntsuas lub cheeb ntawm qhov sib txawv ntawm cov xov.Yog hais tias cov kev ntsuas yog tib yam, nws yog ib tug parallel xov .Yog tias lawv txo qis, koj tau txais cov xov tapered .Hauv kev lag luam kua-lub zog , kev paub txog qhov sib txawv no yog qhov tseem ceeb rau kev ua kom muaj kev sib raug zoo..
Kauj Ruam 2: Ntsuas Xov Pitch nrog Pitch Gauge
Lub suab ntawm ib txoj xov yog qhov kev ncua deb ntawm nws cov crests.Txhawm rau ntsuas qhov no, koj yuav siv lub suab ntsuas .Cov cuab yeej no muaj ntau yam ntawm cov hniav, txhua qhov sib txawv ntawm cov hniav ib nti.Tsuas yog phim lub ntsuas rau cov xov crests.Thaum nws haum snugly, koj tau pom koj lub suab .Cov kauj ruam no yog qhov tseem ceeb rau ob qho tib si metric threads thiab American xov hom.
Kauj ruam 3: Txiav txim siab xov loj thiab profile
Txhawm rau txiav txim siab xov loj , ntsuas qhov loj txoj kab uas hla - cov khoom siv loj tshaj plaws ntawm tus txiv neej xov los yog txoj kab uas hla ntawm tus poj niam xov.Siv lub caliper rau precision.Tom ntej no, xyuas cov xov profile .Qhov no suav nrog cov hniav zoo nkauj thiab cov xov geometry . Metric ISO xov thiab SAE Unified Threads yog hom xov hom , txhua tus muaj cov cim tshwj xeeb.
Kauj Ruam 4: Tsim cov xov raws li tus qauv
Thaum kawg, xaiv cov xov raws li cov qauv kev lag luam.Koj yuav tsum paub qhov nominal loj profile , suab , thiab seb nws yog txoj cai-tes los yog sab laug-tes xov .Cov qauv zoo xws li ISO metric thread , British Standard Whitworth Coarse , thiab Unified National Coarse Thread .Ib txwm xa mus rau cov qauv kev lag luam kom raug xaiv cov xov.
T hread loj tseem ceeb hauv kev ua kom cov xov haum haum rau kev siv xws li hose fittings thiab cua compressor condensate lim .zoo Kev txheeb xyuas txoj xov yog lub hauv paus ntawm kev saib xyuas kev kwv yees thiab kev cob qhia thev naus laus zis hauv kev lag luam vam khom ntawm cov xov xov.
Tswv yim tswv yim rau xaiv txoj cai xov hom
Thaum xaiv cov xov rau koj qhov project, ntau yam tuaj yeem ua si.Nws yog ib qho tseem ceeb kom xav txog cov ntaub ntawv thov , kev sib raug zoo , thiab cov qauv kev lag luam .Nov yog ib qho kev piav qhia ntawm qhov yuav tsum nco ntsoov:
Tej yam uas yuav tsum tau xav txog thaum xaiv cov xov
1. Thread Identification : Nws yog ib qho tseem ceeb kom paub cov xov hom kom raug.Siv lub ntsuas pitch los txiav txim cov xov suab thiab lub caliper los ntsuas qhov loj txoj kab uas hla.
2. Hom sib txawv : Paub cov hom xov hom .Txawm hais tias nws yog ISO xov hom , American xov hom , lossis British Whitworth threads , txhua tus muaj nws qhov tshwj xeeb siv.
3. Fluid-Power Industry : Yog tias koj nyob hauv qhov haujlwm no, SAE Unified Threads tej zaum yuav yog koj mus.Lawv tau tsim los rau cov xwm txheej siab.
4. Thread Size Matters : Nco ntsoov xyuas kom cov xov loj sib haum nrog kev sib txuas haum .Qhov loj me tsis raug tuaj yeem ua rau xau lossis cov khoom puas.
5. Parallel thread vs. Tapered thread : Nkag siab qhov txawv. Parallel threads tuav tib txoj kab uas hla, thaum tapered threads nqaim.Qhov no cuam tshuam rau lub foob thiab seb lawv xaiv cov xov li cas.
6. Pitch Diameter : Lub suab txoj kab uas hla yog qhov tseem ceeb geometric parameter.Nws yog lub tog raj kheej xav txog qhov kev ncua deb ntawm cov xov sib npaug.
Feem ntau yuam kev kom zam
l Cov xov tsis sib xws : Tsis txhob siv cov txiv neej xov nrog cov xov poj niam tsis raug .Qhov no tuaj yeem rub cov xov los yog ua rau tsis zoo.
l Tsis quav ntsej tes taw qhia : txoj cai-tes threads yog ntau dua, tab sis sab laug-tes threads yog siv nyob rau hauv tej yam kev siv.Tsis txhob sib tov.
l Overlooking Standards : Cov qauv kev lag luam , xws li Unified thread standard lossis ISO metric thread , xyuas kom zoo.Tsis txhob quav ntsej lawv.
l Cov khoom siv tsis saib xyuas : Cov khoom siv ntawm cov xov fasteners yuav tsum phim cov khoom uas lawv txuas.Cov ntaub ntawv tsis sib xws tuaj yeem corrode lossis ua tsis tiav.
l Tsis nco qab Xov Xwm Cov Cuab Yeej : Cov cuab yeej zoo li lub xov paj ntsuas qhov tseem ceeb.Lawv pab kom tsis txhob yuam kev hauv xov tooj.
Nco ntsoov, cov txheej txheem kev txheeb xyuas xov tsis yog yuav tsum tau maj mam.Nws yog lub hauv paus rau kev ruaj ntseg thiab haum rau kev sib txuas.Piv txwv li, hauv kev lag luam kua-lub zog, siv cov xov tsis zoo ntawm cov hose fittings los yog raj fittings tuaj yeem ua rau muaj kev puas tsuaj loj.
Xaiv hom xov zoo kuj txhais tau tias xav txog kev tsim xov.Rau cov yeeb nkab txuas, National Taper Pipe (NPT) thiab British Standard Pipe Taper (BSPT) yog hom xov tseem ceeb.Lawv siv tapered thiab conical yeeb nkab threads rau lub kaw ntom nti.
Hauv qhov sib piv, cov ntawv thov uas xav tau cov xov sib txuas yuav siv ISO metric xov lossis Unified National Coarse Thread (UNC).Cov no ua kom muaj qhov sib npaug sab nraud raws li cov threaded qhov chaw.
Thaum kawg, tsis txhob hnov qab txog kev saib xyuas thiab kev cob qhia technology.Nyob ua ntej nrog kev lag luam IoT tuaj yeem pab koj xaiv hom xov zoo thiab tswj nws zoo.Thiab thaum huab cua compressor condensate lim tej zaum yuav zoo li tsis cuam tshuam, lawv kuj tso siab rau txoj xov xaiv kom ua haujlwm zoo.
Xaus
Peb tau taug kev los ntawm lub ntiaj teb zoo sib xws ntawm cov xov, tshuaj xyuas cov nuances uas ua rau txhua hom tshwj xeeb.Los ntawm American Pipe Threads mus rau Metric ISO Threads, kev nkag siab ntau hom xov tsis yog kev kawm xwb - nws yog qhov tsim nyog siv tau.Hauv kev lag luam xws li cov kua hluav taws xob lossis kev tsim khoom, kev paub txog koj cov SAE Unified Threads los ntawm koj cov British Whitworth Threads tuaj yeem txhais tau tias qhov sib txawv ntawm qhov haum zoo thiab qhov yuam kev kim.
Xav txog qhov no hu rau kev nqis tes ua: siv koj cov txuj ci kev txheeb xyuas xov xwm los txhim kho koj txoj haujlwm.Txawm hais tias koj tab tom tsim cov hose fittings los yog xaiv cov yeeb nkab kom raug rau cov raj fittings, nco ntsoov tias xov loj tseem ceeb.Nrog lub suab ntsuas thiab caliper hauv tes, koj tau nruab los xaiv cov xov nrog kev ntseeg siab.
Rau cov neeg nyob hauv thaj teb, cov txheej txheem kev txheeb xyuas xov tsis yog tsuas yog tau txais kev sib txuas ncaj nraim;nws yog hais txog kev ua kom muaj kev nyab xeeb thiab kev ua haujlwm zoo.Cov qauv kev lag luam muaj nyob rau coj peb, thiab cov cuab yeej zoo li xov paj ntsuas kev pab tswj cov qauv.Nco ntsoov, hom xov yog ntau tshaj li cov npe ntawm cov npe-lawv yog hom lus ntawm lawv tus kheej, ib hom lus uas hais txog kev ncaj ncees ntawm txhua txoj xov zoo.
Hauv kev xaus, cov xov tseem ceeb-Parallel xov, Tapered thread, ISO xov hom, American xov hom, thiab British Standard Threads-yog lub tsev blocks ntawm suav tsis txheeb daim ntaub ntawv.Raws li thev naus laus zis nce qib nrog Industrial IoT thiab kev saib xyuas kev kwv yees, yog li peb yuav tsum paub txog kev tsim xov.
