Ta yaya kusurwar majajjawa ke shafar ƙarfin majajjawa Flat?

Tawagar damfara tana ɗaga farantin karfe mai nauyin ton 3 ta amfani da ƙafa biyu lebur majajjawa . Ana kimanta kowace ƙafar majajjawa don ton 2. Nauyin yana da kyau a cikin iya aiki - jimlar ton 4, daidai? Amma an baje kafafun majajjawa a kusurwar 45 °. Mai kula da rigingimu ya san gaskiya: kowace kafa yanzu tana ɗaukar tan 2.1 - wanda ya zarce ƙarfin da aka ƙididdige shi.

 

Wannan yanayin yana faruwa sau da yawa fiye da yawancin ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararrun ƙwararru waɗanda ke kula da yarda da su. Ƙaƙwalwar majajjawa ɗaya ne daga cikin mafi mahimmanci-kuma mafi yawan kuskuren fahimta-abubuwa a cikin ayyukan ɗagawa lafiya.

 

Lishenflex  ya kasance yana kera majajjawa lebur sama da shekaru ashirin, kuma ƙwarewar filinmu ta nuna cewa kuskuren kusurwa shine babban sanadin ɗorawa da gazawa. Fahimtar dangantakar dake tsakanin kusurwar majajjawa da iya aiki yana da mahimmanci ga kowane rigger, mai kulawa, da ƙwararrun aminci.

 

 

Me yasa Sling Angle Mahimmanci

Lokacin da aka yi amfani da majajjawa lebur  a tsaye, ɗagawa madaidaiciya, ana samun cikakken ƙarfin ƙima. Duk da haka, yayin da kafafun majajjawa ke bazuwa - ko a cikin kwandon kwando ko ɗaga ƙafafu da yawa - tashin hankali a kowace ƙafa yana ƙaruwa. Ƙananan kusurwa tsakanin ƙafar majajjawa da kwance (ko mafi girman kusurwar tsakanin kafafu), mafi girma da tashin hankali.

 

Shigar da Wikipedia a kan majajjawa  yayi bayanin cewa Ƙimar Load Aiki (WLL) na majajjawa alama ce akan majajjawa kuma tana ɗaukar ɗagawa a tsaye. Lokacin da aka yi amfani da majajjawa a kusurwa, dole ne a rage WLL, kuma ƙarfin da aka ƙididdige shi yana raguwa yayin da kusurwar tsakanin ƙafar majajjawa ta karu.

 

Matsakaicin EN 1492-1  yana ƙayyade abubuwan rage ƙarfi don majajjawa lebur da aka yi amfani da su a cikin jeri daban-daban:

 

Tushen: TS EN 1492-1 Abubuwan iyawar majajjawa lebur

 

ASME B30.9  yana ba da irin wannan jagorar, yana buƙatar a rage ƙarfin ƙima lokacin da ake amfani da majajjawa a kusurwoyi ko a cikin daidaitawar ƙafafu da yawa. Bisa ga shigarwar 'Ultraviolet' na Wikipedia, zaruruwan roba kamar polyester suma suna da rauni ga lalata UV akan lokaci, wanda zai iya ƙara rage ƙarfin aiki - yin lissafin kusurwa har ma da mahimmanci ga majajjawa da ake amfani da su a waje.

 

Physics na Sling Angle

Dangantakar dake tsakanin kusurwar majajjawa da tashin hankali ana tafiyar da ita ta hanya mai sauƙi:

 

Tashin hankali kowace ƙafa = (Load Nauyin ÷ Yawan Ƙafafun) × Factor Factor

 

An ƙididdige ma'aunin kusurwa kamar: 1 ÷ sin(θ) -inda θ shine kwana tsakanin kafan majajjawa da jirgin sama a kwance.

 

Madogararsa: ASME B30.9 lissafin factor factor

 

Kamar yadda tebur ya nuna, yayin da kusurwa ya ragu, tashin hankali a kowace kafa yana ƙaruwa sosai. A 30 °, tashin hankali ya ninka nauyin tsaye a kowace kafa. A 10°, ya kusan sau shida na lodin tsaye. Wannan yana nufin majajjawa lebur 2-ton a 30° zai iya ɗaukar ton 1 kawai cikin aminci - rabin ƙarfin ƙimarsa.

 

Gwajin dakin gwaje-gwaje na Lishenflex ya tabbatar da cewa majajjawa da ake amfani da su a kusurwoyi marasa zurfi suna fuskantar damuwa sosai a wurin shaƙa da abin da aka makala ido, haɓaka lalacewa da ƙara haɗarin gazawa.

 

Mazagin Ƙafafun Ƙafa da yawa da Abubuwan Hannu

Lokacin amfani da majajjawa masu yawa (2-leg, 3-leg, ko 4-leg), dole ne a yi amfani da ma'aunin kusurwa a kowace kafa. Dangane da shigarwar Encyclopedia Britannica akan injuna masu sauƙi , fa'idar injin majajjawa tana shafar ilimin lissafi na ɗagawa - kusurwoyi masu faɗi suna rage ƙarfin ɗagawa mai inganci.

 

Hanyar da aka ba da shawarar don ɗaga ƙafafu da yawa:

 

1. Auna kusurwa  tsakanin kowace ƙafar majajjawa da a kwance.

 

2. Ƙayyade alamar kusurwa  daga tebur (1/sin θ).

 

3. Ƙididdige tashin hankali a kowace ƙafa = (Load ÷ Adadin ƙafafu) × Matsalar kusurwa.

 

4. Tabbatar cewa tashin hankalin kowace ƙafa  bai wuce majajjawa da aka ƙididdige WLL ba.

 

Kuskuren kusurwa gama gari

Kurakurai guda uku da aka fi yawan alaka da kusurwa a cikin rigingin majajjawa su ne:

 

1. Kallon kusurwa Lokacin Kididdige Jimillar Ƙarfi

 

Kuskuren gama gari shine ƙara WLLs na kowace ƙafar majajjawa ba tare da amfani da abubuwan kusurwa ba. Misali, slings 2-ton guda biyu ba sa samar da tan 4 na iya aiki a 45 ° - suna ba da ton 2.8 kawai (2 × 2t × 0.7 angle factor).

 

2. Amfani da Kuskuren Magana

 

Wasu riggers suna auna kusurwar tsakanin kafafun majajjawa maimakon kwana tsakanin majajjawa da kwance. Teburin ma'aunin kusurwa yana dogara ne akan kusurwa zuwa kwance. Matsayin da aka haɗa tsakanin ƙafafu shine sau biyu kwana zuwa kwance.

 

Magana mai sauri:

 

90° hadedde kwana = 45° zuwa kwance

 

120° hadedde kwana = 60° zuwa kwance

 

30° hadedde kwana = 15° zuwa kwance

 

3. Yin watsi da Rage Ƙarfi a Hitches Kwando

 

A cikin kwandon kwando, kafafu biyu suna raba kaya, amma kusurwa har yanzu yana aiki. Matsakaicin ƙarfin ƙarfin kwando tare da kusurwar ƙafa 45 ° shine 1.4-ba 2.0 ba. Tebur a cikin EN 1492-1 yana ba da madaidaitan abubuwan.

 

Dubawa da Tabbatarwa

Jagoran OSHA akan Amfani da Safe Sling  yana buƙatar a yi la'akari da kusurwar shaƙa da kusurwar ƙafafu na majajjawa yayin da ake tantance iya aiki. Musamman, nauyin da aka ƙididdigewa don majajjawa a cikin buguwar shaƙa yana aiki matuƙar kusurwar shaƙa ya kasance digiri 120 ko fiye. Don kusurwoyin shake kasa da digiri 120, dole ne a rage nauyin da aka ƙima.

 

Dangane da ASME B30.9 , dole ne a tabbatar da ƙididdige ƙididdiga ta mutum wanda ya cancanta kafin kowane ɗagawa. Binciken akai-akai ya kamata ya tabbatar da cewa alamun majajjawa suna iya karantawa, kamar yadda ake buƙatar WLL don ƙididdige kaya masu aminci a kusurwoyi.

 

Maɓallin cirewa mai mahimmanci a ƙarƙashin ASME B30.9 wanda zai iya rinjayar ƙarfin kusurwa:

 

Tambarin shaida da ba a iya gani ba ko ba za a iya gani ba — ba tare da WLL ba, ba za a iya yin lissafin kusurwa ba

 

Shaida na lalacewa ta UV (fading, stiffness) - yana rage ƙarfin fiye da abubuwan kusurwa

 

Lalacewar gani wanda ke rage tasiri mai faɗi - yana tasiri ragowar ƙarfin

 

Takaitawa da Shawarwari Na Aiki

Ƙwararren majajjawa yana ɗaya daga cikin mahimman abubuwan da ke shafar iyawar majajjawa. Maƙirarin majajjawa WLL ya dogara ne akan ɗagawa a tsaye, kuma dole ne a rage ƙarfin lokacin amfani da kusurwoyi.

 

Mabuɗin ɗauka:

 

1. Kada a taɓa amfani da jimillar WLL ba tare da amfani da abubuwan kusurwa ba - tashin hankali yana ƙaruwa yayin da kusurwar ke raguwa

 

2. Auna kusurwa zuwa kwance, ba kwana tsakanin kafafu ba

 

3. Koma zuwa madaidaitan tebur don kwando, shake, da daidaitawar kafafu da yawa

 

4. Bincika alamun majajjawa  don tabbatar da WLL yana iya karantawa-ba tare da shi ba, ba za a iya tabbatar da lissafin kusurwa ba

 

5. Yi la'akari da abubuwan muhalli - UV da zafi na iya rage ƙarfin fiye da abubuwan kwana

 

Lishenflex  yana ƙera slings na polyester tare da bayyananniyar alamar iya aiki mai launi, mai dacewa da ka'idodin EN 1492-1 da ASME B30.9. Muna ba da kayan tunani na kusurwa da horo kan wurin don tabbatar da ƙungiyar ku za ta iya ƙididdige nauyi mai aminci daidai.

 

Idan kuna buƙatar taimako don ƙididdige kayan aiki masu aminci don ƙayyadaddun lissafi na ɗagawa-ko buƙatar taimako don tantance ko majajjawa na yanzu sun dace da ɗagawa mai kusurwa-don Allah a aika imel zuwa sales@lishenflex.com , kuma ƙungiyarmu ta fasaha za ta ba da goyon baya ɗaya-on-daya.