iindaba

Isiseko esiphambili sobugcisa ekukhetheni ikhebula le-coaxial ngenjongo ethile yimpahla yombane, iimpawu zomatshini kunye neempawu zokusingqongileyo.Kwezinye iindawo, ukusebenza komlilo kubalulekile.Zonke ezi zakhiwo zixhomekeke kwisakhiwo sekhebula kunye nezinto ezisetyenzisiweyo.
Iimpawu zombane ezibaluleke kakhulu zekhebula zi-attenuation ephantsi, i-impedance efanayo, ilahleko ephezulu yokubuya, kunye nenqaku eliphambili lekhebula lokuvuza kukulahleka kwayo kokudibanisa.Iimpawu ezibaluleke kakhulu zoomatshini zizixhobo eziguquguqukayo (ngokukodwa kumaqondo aphantsi), amandla okuqina, amandla oxinzelelo kunye nokuxhatshazwa kokugqoka.Iintambo kufuneka zikwazi ukumelana noxinzelelo lokusingqongileyo ngexesha lokuthutha, ukugcinwa, ukufakwa kunye nokusetyenziswa.La mandla asenokubangelwa yimozulu, okanye anokuba sisiphumo sokusabela kweekhemikhali okanye kwindalo.Ukuba intambo ifakwe kwindawo eneemfuno eziphezulu zokhuseleko lomlilo, ukusebenza kwayo komlilo kubaluleke kakhulu, phakathi kwazo ezona zinto zintathu zibaluleke kakhulu: ukulibaziseka komlilo, ukuxinana komsi kunye nokukhululwa kwegesi ye-halogen.

Umsebenzi oyintloko wekhebula kukudlulisa izibonakaliso, ngoko kubalulekile ukuba isakhiwo sekhebula kunye nezinto eziphathekayo zibonelela ngeempawu zokuhambisa ezilungileyo kubo bonke ubomi bentambo, eya kuxutyushwa ngokubanzi apha ngezantsi.
1. Umqhubi wangaphakathi
I-Copper iyona nto ibalulekileyo yomqhubi wangaphakathi, onokuthi ube kwiifom ezilandelayo: ucingo lwe-annealed copper, ityhubhu ye-annealed copper, i-copper coated aluminium wire.Ngokuqhelekileyo, i-conductor yangaphakathi yeentambo ezincinci ziyi-copper-clad wire aluminium, ngelixa iintambo ezinkulu zisebenzisa iityhubhu zobhedu ukunciphisa ubunzima bekhebula kunye neendleko.I-conductor yangaphandle yekhebula enkulu inemigca, ukuze kufumaneke ukusebenza kakuhle kokugoba okwaneleyo.
Umqhubi wangaphakathi unempembelelo enkulu kwi-transmission yesignali kuba i-attenuation ibangelwa ikakhulu ukulahlekelwa kokuchasana komqhubi wangaphakathi.I-conductivity, ngokukodwa i-surface conductivity, kufuneka ibe phezulu kangangoko kunokwenzeka, kwaye imfuno ngokubanzi yi-58MS / m (+20 ℃), kuba kwi-frequency ephezulu, i-current ihanjiswa kuphela kwinqanaba elincinci kwi-conductor surface, le nto. ibizwa ngokuba yi-skin effect, kwaye ubungqingqwa obusebenzayo bomaleko wangoku bubizwa ngokuba bunzulu bolusu.Itheyibhile 1 ibonisa amaxabiso obunzulu bolusu lweetyhubhu zethusi kunye neengcingo ze-aluminiyam ezifakwe ubhedu njengee-conductor zangaphakathi kwiifrikhwensi ezithile.
Umgangatho wezinto zobhedu ezisetyenziselwa umqhubi wangaphakathi uphezulu kakhulu, ufuna ukuba izinto zobhedu zingabikho ukungcola, kwaye ubuso bucocekile, bubushelelezi kwaye bucolile.I-diameter ye-conductor yangaphakathi kufuneka izinzile kunye nokunyamezelana okuncinci.Naluphi na utshintsho kububanzi luya kunciphisa ukufana kwe-impedance kunye nokubuyisela ilahleko, ngoko ke inkqubo yokuvelisa kufuneka ilawulwe ngokuchanekileyo.

2. Umqhubi wangaphandle
Umqhubi wangaphandle unemisebenzi emibini esisiseko: eyokuqala ngumsebenzi we-loop conductor, kwaye okwesibini ngumsebenzi wokukhusela.I-conductor yangaphandle yentambo evuzayo ikwamisela ukusebenza kwayo okuvuzayo.Umqhubi wangaphandle we-coaxial feeder cable kunye ne-super flexible cable idityaniswe ngumbhobho wobhedu oqengqelekayo.Umqhubi wangaphandle wale ntambo uvalwe ngokupheleleyo, ongavumeli nayiphi na i-radiation evela kwintambo.
Umqhubi wangaphandle udla ngokugqunywa ngobude ngeteyiphu yobhedu.Kukho iinotshi ezinde okanye ezinqamlezileyo okanye imingxunya kumaleko omqhubi wangaphandle.I-grooving ye-conductor yangaphandle ixhaphakile kwintambo ye-corrugated.Incochoyi ye-corrugation yenziwe nge-grooves yokusika elinganayo ecaleni kwendlela ye-axial.Umyinge wenxalenye esikiweyo incinci, kwaye isithuba sesithuba sincinci kunobude obusasazwayo be-electromagnetic wave.
Ngokucacileyo, intambo engavuziyo inokwenziwa ibe yintambo evuzayo ngokuyenza ngolu hlobo lulandelayo: incopho yangaphandle ye-conductor wave yentambo eqhelekileyo evuzayo kwintambo engavuziyo iyasikwa kwi-Angle ye-120 degrees ukufumana iseti efanelekileyo. isakhiwo slot.
Ubume, ububanzi kunye nesakhiwo se-slot sentambo evuzayo imisela isalathisi sokusebenza kwayo.
Izinto zobhedu zomqhubi wangaphandle kufuneka kwakhona zibe nomgangatho omhle, kunye ne-conductivity ephezulu kwaye kungabikho ukungcola.Ubungakanani be-conductor yangaphandle kufuneka ilawulwe ngokungqongqo ngaphakathi koluhlu lonyamezelo ukuze kuqinisekiswe i-impedance yeempawu ezifanayo kunye nelahleko ephezulu yokubuya.
Iingenelo ze-welding umqhubi wangaphandle wetyhubhu yobhedu eqengqelekayo zezi zilandelayo:
Ivalwe ngokupheleleyo I-conductor yangaphandle ekhuseleke ngokupheleleyo engenamitha kwaye inqanda ukufuma ekungeneni.
Inokungangeni manzi ixesha elide ngenxa yezangqa
Iimpawu zomatshini zizinzile kakhulu
Amandla omatshini aphezulu
Ukusebenza ngokugoba okugqwesileyo
Uqhagamshelwano lulula kwaye luthembekile
Intambo ephezulu ebhetyebhetye inerediyasi encinci yokugoba ngenxa ye-spiral corrugation enzulu

3, i-insulating medium
I-Rf coaxial cable medium ikude nokudlala indima yokugquma, ukuhanjiswa kokugqibela kokusebenza kunqunywe ngokukodwa emva kokugquma, ngoko ke ukukhethwa kwezinto eziphakathi kunye nesakhiwo sayo kubaluleke kakhulu.Zonke iipropathi ezibalulekileyo, ezifana nokunciphisa, i-impedance kunye nelahleko yokubuya, zixhomekeke kakhulu kwi-insulation.
Ezona mfuno zibalulekileyo zokugquma zezi:
Isalamane esisezantsi se-dielectric rhoqo kunye nelahleko encinci ye-dielectric I-Angle factor yokuqinisekisa ukuthotywa okuncinci
Ulwakhiwo luhambelana nokuqinisekisa i-impedance efanayo kunye nelahleko enkulu ye-echo
Iipropati ezizinzileyo zoomatshini ukuqinisekisa ubomi obude
into evikela amanzi
Ukugquma amagwebu aphezulu emzimbeni kunokuhlangabezana nazo zonke ezi mfuno zingentla.Ngeteknoloji ye-extrusion ephezulu kunye ne-injection yegesi kunye nezixhobo ezikhethekileyo, idigri ye-foaming inokufikelela ngaphezu kwe-80%, ngoko ukusebenza kombane kusondele kwintambo yokufaka umoya.Kwindlela yokutofa igesi, initrogen itofwa ngokuthe ngqo kwizinto eziphakathi kwi-extruder, eyaziwa ngokuba yindlela yokwenza amagwebu.Xa kuthelekiswa nale ndlela yekhemikhali yogwebu, idigri yayo yogwebu inokufikelela kuphela malunga nama-50%, ilahleko ephakathi inkulu.Ulwakhiwo lwegwebu olufunyenwe ngendlela yokutofa kwerhasi luyahambelana, oko kuthetha ukuba ukungasebenzi kwayo kuyafana kwaye ilahleko ye-echo inkulu.
Iintambo zethu ze-RF zinezakhiwo zombane ezilungileyo kakhulu ngenxa yelahleko encinci ye-dielectric I-engile kunye neqondo elikhulu logwebu lwemathiriyeli.Iimpawu ze-foaming medium zibaluleke kakhulu kwiifrikhwensi eziphezulu.Sesi sakhiwo sikhethekileyo sogwebu esimisela ukusebenza okuphantsi kakhulu kwentambo kwi-frequencies ephezulu.
Unique MULTI-LAyer insulation (INNER THIN LAYER - FOAMING umaleko - yangaphandle umaleko obhityileyo) co-extrusion inkqubo unokufumana iyunifomu, isakhiwo amagwebu evaliweyo, kunye neempawu mechanical ezinzile, amandla aphezulu kunye nokuxhathisa okulungileyo ukufuma kunye nezinye iimpawu.Ukuze wenze intambo igcine ukusebenza kakuhle kombane kwindawo efumileyo, siyilwe ngokukhethekileyo uhlobo lwentambo: umaleko obhityileyo we-PE oqinileyo wongezwa kumphezulu womgangatho wokugquma amagwebu.Lo mgangatho wangaphandle omncinci ukhusela ukungena komswakama kwaye ukhusela ukusebenza kombane wekhebula ukususela ekuqaleni kwemveliso.Olu luyilo lubaluleke kakhulu kwiintambo ezivuzayo ezineekhondaktha zangaphandle ezinemingxuma.Ukongezelela, i-insulation layer ihlanganiswe ngokuqinileyo kwi-conductor yangaphakathi ngomgca omncinci wangaphakathi, ophucula ngakumbi ukuzinza komatshini wekhebula.Ngaphezu koko, umaleko omncinci uqulethe i-stabilizer ekhethekileyo, enokuqinisekisa ukuhambelana nobhedu kunye nokuqinisekisa ubomi obude benkonzo yekhebula lethu.Khetha izinto ezifanelekileyo zomaleko obhityileyo wangaphakathi, unokufumana iipropathi ezanelisayo, ezinje: ukuxhathisa ukufuma, ukuncamathela kunye nokuzinza.
Olu yilo lwe-insulation multi-layer (umaleko ongaphakathi obhityileyo - umaleko wegwebu - umaleko ongaphandle obhityileyo) unokufezekisa zombini iipropathi ezigqwesileyo zombane kunye neempawu ezizinzileyo zomatshini, ngaloo ndlela ziphucula ubomi benkonzo yexesha elide kunye nokuthembeka kweentambo zethu zeRF.

4, isingxobo
Eyona imathiriyeli yesheath esetyenziswa ngokuqhelekileyo kwiintambo zangaphandle yipolyethylene emnyama yomgca woxinaniso oluphantsi, enoxinaniso olufana ne-LDPE kodwa amandla anokuthelekiswa ne-HDPE.Endaweni yoko, kwezinye iimeko, sikhetha i-HDPE, ebonelela ngeempawu ezingcono zoomatshini kunye nokuchasana nokungqubana, ikhemistri, ukufuma, kunye neemeko ezahlukeneyo zokusingqongileyo.
I-HDPE emnyama enobungqina be-Uv inokumelana noxinzelelo lwemozulu olufana nobushushu obuphezulu kakhulu kunye nemitha ye-UV egqithisileyo.Xa kugxininiswa ukhuseleko lomlilo lweentambo, kufuneka kusetyenziswe izinto zokunqanda umlilo we-halogen-free-flame retardant.Kwiintambo ezivuzayo, ukwenzela ukunciphisa ukusasazeka komlilo, i-tape yokubuyisela umlilo ingasetyenziselwa phakathi kwe-conductor yangaphandle kunye ne-sheath ukugcina umaleko we-insulation lula ukunyibilika kwintambo.

5, ukusebenza umlilo
Iintambo ezivuzayo zidla ngokufakwa kwiindawo ezineemfuno eziphezulu zokhuseleko lomlilo.Ukhuseleko lwekhebula elifakweyo lihambelana nokusebenza komlilo wekhebula ngokwayo kunye nendawo yokufakela.Ukutsha, ukuxinana komsi kunye nokukhutshwa kwegesi ye-halogen zizinto ezintathu ezibalulekileyo ezinxulumene nokusebenza komlilo wentambo.
Ukusetyenziswa kwe-sheathing ye-flame retardant kunye nokusetyenziswa kwebhanti yokuhlukanisa umlilo xa udlula eludongeni kunokuthintela ilangatye ukuba lisasazeke ecaleni kwentambo.Uvavanyo olusezantsi lokutsha luvavanyo lokutshisa ngokuthe nkqo kwikhebula elilodwa ngokwe-IEC332-1 standard.Zonke iintambo zangaphakathi kufuneka zihlangabezane nale mfuneko.Imfuno engqongqo ngakumbi ihambelana ne-IEC332-5 yovavanyo oluqhelekileyo lokutshisa ibhandle.Kulo vavanyo, iintambo zitshiswa ngokuthe nkqo kwiingxowa, kwaye ubude bokutsha abuvunyelwanga ukuba budlule ixabiso elichaziweyo.Inani leentambo linxulumene neenkcukacha zentambo yovavanyo.Ubuninzi bomsi ngexesha lokutshiswa kwentambo kufuneka kuqwalaselwe.Umsi unokubonakala okuphantsi, ivumba elibi, kwaye kulula ukubangela iingxaki zokuphefumla kunye nezothuso, ngoko kuya kuzisa ubunzima bokuhlangula kunye nomsebenzi wokucima umlilo.Ubuninzi bomsi beentambo zokutsha buvavanywa ngokuhambelana nokugqithiswa kokukhanya kwe-IEC 1034-1 kunye ne-IEC 1034-2, kwaye ixabiso eliqhelekileyo lokuhambisa ukukhanya kwiintambo zomsi ophantsi mkhulu kune-60%.
I-PVC inokuhlangabezana neemfuno ze-IEC 332-1 kunye ne-IEC 332-3.Yimpahla eqhelekileyo kunye neyendabuko yeentambo zangaphakathi, kodwa ayifanelekanga kwaye inokubangela ukufa ngokulula xa kuqwalaselwa ukhuseleko lomlilo.Xa ukufudumala kwiqondo lokushisa elithile eliphezulu, i-PVC iya kuthobisa kwaye ivelise i-halogen acids.Xa i-PVC i-sheathed cable itshiswa, i-1 kg ye-PVC iya kuvelisa i-1 kg ye-halogen acid kunye noxinzelelo lwe-30% kuquka namanzi.Ngenxa yolu hlobo lokonakala kunye netyhefu yePVC, imfuno yeentambo ezingenazo i-halogen inyuke kakhulu kwiminyaka yakutshanje.Isixa se-halogen silinganiswa ngokwe-IEC 754-1 standard.Ukuba inani le-asidi ye-halogen ekhutshwe yizo zonke izinto ngexesha lokutsha alidluli i-5mg / g, ikhebula libhekwa njenge-halogen mahhala.
Izinto zekhebula ze-halogen-free flame retardant (HFFR) zidla ngokuba ziikhompawundi zepolyolefin ezineeminerali zokugcwalisa, ezifana ne-aluminiyam hydroxide.Ezi zigcwalisi zichitha umlilo, zivelise i-aluminium oxide kunye nomphunga wamanzi, othintela ngokufanelekileyo umlilo ukuba usasazeke.Iimveliso zokutsha ze-filler kunye ne-polymer matrix ayinayo ityhefu, i-halogen ikhululekile kunye nomsi ophantsi.
Ukhuseleko lomlilo ngexesha lofakelo lwentambo lubandakanya le miba ilandelayo:
Kwisiphelo sokufikelela kwintambo, iintambo zangaphandle kufuneka zidityaniswe kwiintambo ezikhuselekileyo emlilweni
Gwema ukufakwa kumagumbi kunye neendawo ezinomngcipheko womlilo
Isithintelo somlilo eludongeni kufuneka sikwazi ukutshisa ixesha elide ngokwaneleyo kwaye sibe ne-insulation yobushushu kunye nokuqina komoya
Ukhuseleko lubalulekile ngexesha lofakelo