Ɔkwan Bɛn so na Sling Angle Ka Tumi a Sling a Ɛyɛ Tratraa Tum?

Rigging kuw bi de anan abien rema dade mprɛte a emu duru yɛ tɔn 3 so sling a ɛyɛ tratraa . Wɔakyerɛ sɛ sling nan biara yɛ tɔn 2. Ɛte sɛ nea adesoa no dɔɔso yiye—ne nyinaa yɛ tɔn 4, ɛnte saa? Nanso wɔatrɛw sling nan no mu wɔ 45° anim. Riging sohwɛfo no nim nokware no: mprempren nan biara soa tɔn 2.1—boro nea wɔahyɛ sɛ ɛbɛsoa no so.

 

Saa tebea yi taa ba sen sɛnea rigging adwumayɛfo dodow no ara dwen ho sɛ wobegye atom. Sling angle yɛ nneɛma a ɛho hia sen biara —na wɔtaa nte ase yiye —wɔ adwuma a wɔde ma nneɛma so a ahobammɔ wom no mu biako.

 

Lishenflex  ayɛ synthetic flat slings bɛboro mfe aduonu ni, na yɛn afuw mu osuahu kyerɛ sɛ angle akontaabu a ɛnteɛ yɛ ade titiriw a ɛde sling boro so na edi huammɔ. Abusuabɔ a ɛda sling angle ne tumi ntam ntease ho hia ma rigger, ɔhwɛfo, ne ahobammɔ ho nimdefo biara.

 

 

Nea Enti a Sling Angle Ho Hia

Sɛ wɔde sling a ɛyɛ tratraa  di dwuma wɔ vertical, straight lift mu a, tumi a wɔahyɛ no nyinaa wɔ hɔ. Nanso, bere a wɔtrɛw sling nan no mu—sɛ́ ɛyɛ kɛntɛn a wɔde hyɛ mu anaasɛ nan pii a wɔde ma so no—nhyɛso a ɛwɔ nan biara mu no yɛ kɛse. Dodow a anim a ɛda sling nan no ne nea ɛda fam no ntam sua (anaasɛ dodow no ara na anim a ɛda nan no ntam no yɛ kɛse) no, dodow no ara na nhyɛso no kɔ soro.

 

Wikipedia nsɛm a wɔakyerɛw wɔ slings ho no  kyerɛkyerɛ mu sɛ wɔahyɛ Working Load Limit (WLL) a ɛwɔ sling mu no agyirae wɔ sling no so na ɛfa no sɛ wɔma so gyina hɔ. Sɛ wɔde sling no di dwuma wɔ anim a, ɛsɛ sɛ wɔtew WLL no so, na rated capacity no so tew bere a anim a ɛda sling nan no ntam no kɔ soro no.

 

EN 1492-1  gyinapɛn no kyerɛ nneɛma a ɛtew tumi so ma slings a ɛyɛ tratraa a wɔde di dwuma wɔ hitch nhyehyɛe ahorow mu:

 

Fibea: EN 1492-1 flat webbing sling tumi nneɛma

 

ASME B30.9  de akwankyerɛ a ɛte saa ara ma, a ɛhwehwɛ sɛ wɔtew tumi a wɔahyɛ no so bere a wɔde slings di dwuma wɔ anim anaa wɔ nan pii nhyehyɛe mu. Sɛnea Wikipedia 'Ultraviolet' entry kyerɛ no, nhama a wɔayɛ te sɛ polyester nso yɛ mmerɛw sɛ UV sɛe bere kɔ so, a ebetumi atew tumi so bio —a ɛma anim akontaabu ho hia kɛse mpo ma slings a wɔde di dwuma wɔ abɔnten.

 

Abɔde mu Nneɛma a Ɛfa Sling Angle Ho

Wɔde ɔkwan tiawa bi na ɛkyerɛ abusuabɔ a ɛda sling angle ne tension ntam:

 

Tension per leg = (Adesoa Mu duru ÷ Nan Dodow) × Angle Factor

 

Wɔbu anim factor no sɛ: 1 ÷ sin(θ) —a θ yɛ anim a ɛda sling nan ne horizontal plane ntam.

 

Fibea: ASME B30.9 anim factor akontabuo

 

Sɛnea pon no kyerɛ no, bere a anim no so tew no, nhyɛso a ɛwɔ nan biara mu no kɔ soro kɛse. Wɔ 30° mu no, nhyɛso no yɛ adesoa a ɛda hɔ no mmɔho abien wɔ nan biara mu. Sɛ ɛyɛ 10° a, ɛkame ayɛ sɛ ɛyɛ adesoa a ɛda hɔ no mmɔho asia. Eyi kyerɛ sɛ afiri a ɛyɛ tratraa a emu duru yɛ tɔn 2 a ɛwɔ 30° betumi asoa tɔn 1 pɛ dwoodwoo—ne tumi a wɔahyɛ sɛ ɛyɛ fã.

 

Lishenflex nhwehwɛmu a wɔyɛe wɔ lab no si so dua sɛ slings a wɔde di dwuma wɔ afã horow a emu nnɔ no nya adwennwen kɛse kɛse wɔ choke point ne aniwa a ɛbata ho no so, na ɛma ɛhyɛ ntɛmntɛm na ɛma asiane a ɛwɔ hɔ sɛ ebedi nkogu no yɛ kɛse.

 

Multi-Leg Slings ne Nneɛma a Ɛma Angle

Sɛ wode akuturuku a ɛwɔ nan pii (nan 2, nan 3, anaa nan 4) redi dwuma a, ɛsɛ sɛ wɔde anim factor no di dwuma wɔ nan biara so. Sɛnea Encyclopedia Britannica nkyerɛwee a ɛfa mfiri a ɛnyɛ den ho kyerɛ no , sɛnea afiri a wɔde ma so no geometry na ɛka mfiridwuma mu mfaso a ɛwɔ sling so no—afã horow a ɛtrɛw no brɛ tumi a etu mpɔn a wɔde ma so no ase.

 

Ɔkwan a wɔkamfo kyerɛ sɛ wɔmfa nyɛ nan pii a wɔma so:

 

1. Sua anim  a ɛda sling nan biara ne nea ɛda fam no ntam.

 

2. Kyerɛ angle factor  no fi pon no so (1/sin θ).

 

3. Bu nhyɛsoɔ a ɛwɔ nan biara mu = (Adesoa ÷ Nan dodoɔ) × Angle factor.

 

4. Hwɛ sɛ nan biara nhyɛso  ntra WLL a wɔahyɛ sɛ sling no.

 

Mfomso a Ɛtaa Ba wɔ Angle

Mfomso abiɛsa a ɛtaa di wɔ anim a ɛfa anim wɔ flat sling rigging mu ne:

 

1. Overlooking Angle Bere a Worebu Total Capacity ho akontaa

 

Mfomso a ɛtaa ba ne sɛ wode WLL ahorow a ɛwɔ sling nan biara mu bɛka ho a wɔmfa angle factors nni dwuma. Sɛ nhwɛso no, sling abien a emu duru yɛ tɔn 2 mma ahoɔden tɔn 4 wɔ 45° —ɛma tɔn 2.8 pɛ (2 × 2t × 0.7 angle factor).

 

2. Reference Angle a Ɛnteɛ a Wɔde Di Dwuma

 

Riggers binom susuw anim a ɛda sling nan no ntam sen sɛ wɔbɛsusuw anim a ɛda sling no ne nea ɛda fam no ntam. Angle factor table no gyina angle to horizontal so. Ahinanan a ɛka ho a ɛda nan ntam no yɛ anim a ɛkɔ soro no mmɔho abien.

 

Nhwehwɛmu a wɔyɛ no ntɛm:

 

90° a ɛka ho no anim = 45° kɔ soro

 

120° a ɛka ho no anim = 60° kɔ soro

 

30° a ɛka ho no anim = 15° kɔ soro

 

3. Bu a wobu ani gu Tumi a Wɔtew So wɔ Basket Hitches mu

 

Wɔ basket hitches mu no, nan abien no kyɛ adesoa no, nanso anim no da so ara yɛ adwuma. Tumi factor a ɛwɔ basket hitch a ne nan anim yɛ 45° yɛ 1.4 —ɛnyɛ 2.0. Pon a ɛwɔ EN 1492-1 no de nneɛma a ɛfata ma.

 

Nhwehwɛmu ne Nhwehwɛmu a Wɔyɛ

no OSHA Akwankyerɛ a ɛfa Sling a Wɔde Di Dwuma Ahobammɔ Ho  hwehwɛ sɛ wosusuw anim a wɔde choke ne sling nan no anim bere a wɔrekyerɛ tumi a wɔahyɛ sɛ wɔmfa nni dwuma no. Ne titiriw no, adesoa a wɔahyɛ sɛ wɔmfa mma sling a ɛwɔ choke hitch mu no yɛ adwuma sɛ choke no anim yɛ digrii 120 anaa nea ɛboro saa a. Sɛ angles of choke nnu digrii 120 a, ɛsɛ sɛ wɔtew adesoa a wɔahyɛ no so.

 

Sɛnea ASME B30.9 kyerɛ no , ɛsɛ sɛ obi a ɔfata di tumi akontabuo no ho adanseɛ ansa na wɔaforo biara. Ɛsɛ sɛ nhwehwɛmu a wɔtaa yɛ no hwɛ sɛ sling tags no yɛ nea wotumi kenkan, efisɛ wɔhwehwɛ sɛ WLL no bu adesoa a ahobammɔ wom wɔ anim.

 

Nneɛma atitiriw a wɔde yi fi hɔ wɔ ASME B30.9 ase a ebetumi aka anim tumi:

 

Nkyerɛwde a ɛyera anaasɛ wontumi nkenkan—sɛ WLL nni hɔ a, wontumi nyɛ anim akontaabu

 

Adanse a ɛkyerɛ sɛ UV asɛe (ɛyɛ mmerɛw, ɛyɛ den)—ɛtew tumi a ɛwɔ so no so sen nneɛma a ɛwɔ anim

 

Ɔsɛe a wotumi hu a ɛtew ntrɛwmu a etu mpɔn so—ɛka tumi a aka no

 

Nsɛm a Wɔaboaboa Ano ne Nyansahyɛ a Mfaso

Sling angle yɛ nneɛma a ɛho hia sen biara a ɛka flat sling tumi no mu biako. A sling’s rated WLL gyina vertical lift so, na ɛsɛ sɛ wɔtew tumi so bere a wɔde di dwuma wɔ afã horow no.

 

Nneɛma atitiriw a wɔde kɔ:

 

1. Mfa WLL ahorow no nyinaa nni dwuma da a womfa angle factors nni dwuma —nhyɛso kɔ soro bere a anim no so tew no

 

2. Sua anim a ɛkɔ soro no, na ɛnyɛ anim a ɛda nan ntam no

 

3. Hwɛ capacity tables ma basket, choke, ne multi-leg nhyehyɛe

 

4. Hwɛ sling tags mu hwɛ  sɛ WLL yɛ nea wotumi kenkan —sɛ enni hɔ a, wontumi nkyerɛ sɛ angle akontaabu ahorow no yɛ nokware

 

5. Susuw nneɛma a atwa yɛn ho ahyia ho —UV ne ɔhyew betumi atew tumi so asen nneɛma a ɛwɔ anim

 

Lishenflex  yɛ polyester flat slings a ɛwɔ kɔla-coded tumi agyiraehyɛde a emu da hɔ, a ɛne EN 1492-1 ne ASME B30.9 gyinapɛn hyia. Yɛde angle factor reference materials ne on-site training ma de hwɛ hu sɛ wo kuw no betumi abu adesoa a ahobammɔ wom ho akontaa yiye.

 

Sɛ wuhia mmoa a wode bebu adwumayɛ adesoa a ahobammɔ wom ama wo lift geometry pɔtee no —anaasɛ wuhia mmoa a wode bɛkyerɛ sɛ ebia wo mprempren slings no fata ma angled lifts —yɛsrɛ wo fa email kɔma sales@lishenflex.com , na yɛn mfiridwuma kuw no de mmoa bɛma mmiako mmiako.