Alakaʻi Valve Pulelehua Palekana Ahi

He mea maʻamau loa nā kiwikā pulelehua pale ahi i ke kūkulu ʻana i nā ʻōnaehana kinai ahi.

Hoʻohana nui ʻia lākou e kāohi i ke kahe ʻana o ka wai. Wehe a pani koke lākou. He liʻiliʻi lākou a maʻalahi hoʻi e hoʻokomo.

Ke hoʻohālikelike ʻia me nā kiwikā puka a i ʻole nā ​​kiwikā poepoe, ʻoi aku ka liʻiliʻi o ka ikaika hana e pono ai nā kiwikā pepeke. ʻO kēia ka mea e kūpono loa ai lākou no nā paipu anawaena nui.
Hiki iā ʻoe ke loaʻa pinepine iā lākou ma nā paipu nui o nā ʻōnaehana hydrant ahi o loko, nā ʻōnaehana sprinkler aunoa, nā puka pamu ahi, nā ʻōnaehana hoʻolako wai i hoʻokaʻawale ʻia, a me nā paipu ahi o waho.
Aia lākou ma nā wahi āpau o nā ʻōnaehana ahi. Ma muli o kēia, ua manaʻo pinepine ʻia lākou he mea maʻamau.

1. He aha ka mea e hoʻolilo ai i kahi kiwikā pepeke i "Pae Palekana Ahi"

1.1 Wehewehena o kahi Valve Pulelehua Pale Ahi.

ʻO nā kiwikā pulelehua pale ahi i kapa ʻia he mau kiwikā pulelehua hōʻailona ahi a i ʻole nā ​​kiwikā ahi i hoʻolaʻa ʻia.

ʻAʻole i wehewehe ʻia kahi kiwikā pulelehua pale ahi e kona helehelena a inoa paha.
Pili ia i kahi kiwikā pepeke i kūpono no ka hoʻohana ʻana i nā ʻōnaehana kinai ahi. Hoʻohana nui ʻia ia e kāohi i ke kahe ʻana o ka wai ma nā paipu hydrant a i ʻole sprinkler.

ʻO ka ʻokoʻa nui mai ka valve butterfly maʻamau penei:
Hiki iā ia ke hoʻouna i nā hōʻailona wehe a pani paha i ka manawa maoli i ke kikowaena hoʻomalu ahi.

Eia kekahi, pono e hana pono kahi valve pulelehua pale ahi ma lalo o nā kūlana ʻōnaehana ahi koʻikoʻi, e like me:

*Kaomi paʻa lōʻihi
*Piʻi koke ke kaomi ke hoʻomaka ka pamu ahi
*Hamare wai i ka wā o ka hana valve a i ʻole ka hoʻololi ʻana o ka ʻōnaehana
* Hana hilinaʻi i nā kūlana pilikia

1.2 No ke aha i hoʻohana ʻia ai nā kiwikā pepeke i nā ʻōnaehana ahi?

Hana 90-kekelē no ka pane wikiwiki
Ke kū'ē haʻahaʻa o ka disc a me ka pohō kaomi i kāohi ʻia
ʻOi aku ka hoʻokele waiwai ma mua o nā kiwikā puka no nā nui nui

2. Nā ʻAno Maʻamau a me nā Mea Hana o nā Kiwikā Pepeiao Palekana Ahi

ʻO ka hapa nui o nā kiwikā pulelehua pale ahi he ʻano grooved a i ʻole ke ʻano flanged.
Ua lako lākou me nā hōʻailona kūlana. Hiki ke hoʻouna ʻia ke kūlana wehe a pani i ka lumi hoʻomalu ahi.

2.1 Nā ʻAno Hoʻohui

2.1.1 Kiwikā Pepeiao Grooved

Ua ʻoki ʻia nā grooves ma nā wēlau o ka paipu a hoʻopili ʻia me nā couplings.
He wikiwiki ke kau ʻana a ʻaʻole pono ka wili ʻana.
Kiwikā pulelehua ʻano Grooveshe kūpono no ka hoʻoponopono hou ʻana o ka wahi a me ka kūkulu hou ʻana o nā hale hou.
ʻOi aku ma mua o 80% o nā ʻōnaehana ahi e hoʻohana i kēia ʻano.

2.1.2 Wafer Butterfly Valve

ʻO kakiwikā ʻano waferʻAʻohe flanges o ke kino a ua hoʻopaʻa pololei ʻia ma waena o nā flanges o nā paipu ʻelua.

ʻO ia ka mea liʻiliʻi loa a me ka māmā loa, akā koi ʻia ke kaulike pololei i ka wā o ke kau ʻana.

2.1.3 Kiwikā Pepeiao Flanged

Loaʻa i nā wēlau ʻelua nā flanges a hoʻopaʻa ʻia me nā bolts.
He hilinaʻi ka sila ʻana a he maʻalahi ka mālama ʻana.
Hoʻohana pinepine ʻia kēia ʻano no nā paipu nui a i ʻole ke kaomi kiʻekiʻe.

2.2 Nā ʻAno Sila

2.2.1 Pāpale Pepeiao Noho Palupalu

Hoʻohana ʻia ke sila ʻana o ka laholio. Hana pani paʻa.
Kūpono no ka wai maʻemaʻe ma ka mahana maʻamau.

2.2.2 Kiwikā Pepeiao Noho Metala

Metala-i-metalasila ʻana. ʻOi aku ka maikaʻi no ke kaomi kiʻekiʻe.
He kūpono no ka wai i loaʻa paha nā mea haumia.

No nā mea hana, ʻo ke kino valve he hao ductile me ka uhi epoxy no ka pale ʻana i ka pala.
He hao ductile ka diski me ka uhi nickel a i ʻole ke kila kila.
He kila kila ke koʻokoʻo.

Noho pinepine ka wai ahi i ka paʻa no ka wā lōʻihi. Kiʻekiʻe ka pilikia o ka palaho.
Ua koho ʻia kēia mau mea no ke ola lawelawe lōʻihi.

3. Nā helu kaomi nui ma nā ʻōnaehana pale ahi

3.1 Ke Kiʻekiʻe o ka Pīpī Manaʻo ma lalo o ke Kaomi

I ka hapa nui o nā papahana ahi, ʻo PN16 ka helu kaomi paʻamau.

Wahi a ke kūlana Kina GB 50974 - Code for Design of Fire Water Supply and Hydrant Systems, ʻo ke kaomi hana o nā ʻōnaehana ahi o loko ma waena o 1.0 MPa a me 1.6 MPa.

No nā hale kiʻekiʻe a i ʻole nā ​​​​wahi ākea, ʻoi aku paha ke kiʻekiʻe o ke kaomi.
Eia nō naʻe, ua uhi mua ʻo PN16 i ka hapa nui o nā hale maʻamau.

Nīnau ka poʻe he nui pehea e hiki ai i ka wai kiʻekiʻe ke pīpī ma lalo o kēia kaomi.
Ke lawe nei i kahi nozzle hose ahi ma ke ʻano he laʻana, ma lalo o ke kaomi PN16, hiki i ka wai ke hiki i kahi 163 mika kū pololei.

Ua helu ʻia kēia waiwai me ka hoʻohana ʻana i ke ʻano hana:

h = P / (ρ × g)

Ma hea:
P = 1.6 × 10⁶ Pa
ρ (ka nui o ka wai) ≈ 1000 kg/m³
g ≈ 9.81 m/s²

Ka hopena i helu ʻia:
h ≈ 163 m

Ma nā kūlana maoli, hoʻemi ke kiʻekiʻe o ke kū'ē ʻana o ka nozzle, ka friction ea, a me ka pohō o ka paipu.
ʻO ke kiʻekiʻe maoli o ka pīpī he 140–150 mika.
Ua lawa kēia no ka hapa nui o nā hale, e like me nā hale noho kiʻekiʻe a me nā hale kūʻai.

3.2 Ke Kiʻekiʻe Maoli o ka Pīpī ma ka Hana ʻenekinia

I loko o nā ʻōnaehana ahi, ʻaʻole manaʻo nui ke kaomi.
He pili pono ia i ke kiʻekiʻe o ka hale.

Ma hope o ka noʻonoʻo ʻana i nā pohō paipu, nā palena palekana, a me nā loli o ke kaomi i hoʻokumu ʻia e ka hoʻomaka a me ka hoʻōki ʻana o ka pamu, ua ʻae pinepine ʻia nā waiwai penei:

Ma muli o kēia, lilo ʻo PN16 i koho palekana a kūpono hoʻi i ke kumukūʻai.

3.3 Nā Loiloi Kaomi Maʻamau i nā Papahana Ahi

Nā ʻōnaehana hydrant ahi i loko → PN16
Nā ʻōnaehana pīpī ʻakomi → PN16
Nā paipu ahi waho → PN16 a ʻoi aku paha
Nā laina hoʻokuʻu pamu ahi → PN20 / PN25 ma kekahi mau papahana

Inā haʻahaʻa ka helu kaomi ma mua o PN16,
ʻaʻole paha i lawa ka palena palekana o ka ʻōnaehana i ka wā pilikia.