看起來你不是TradeKey.com的會員。 立即註冊,與全球超過7百萬的進口商和出口商建立聯繫。 点击注册--免费! |
BOOK A CALL
Book Call On Your Favorite Time
Code
🗘

By Signing Up. I agree to TradeKey.com Terms of Use, Privacy Policy, IPR and receive emails related to our services

Contact Us
Sell

Sell

离岸价格

获取最新报价

170000 ~ 300000 / Piece ( Negotiable )

|

Minimum Order

位置:

China

最小订单价格:

最小订单:

1 Piece

包装细节:

Bulk

交货时间:

45 days

供应能力:

10000 Piece per Day

付款方式:

T/T, L/C, D/A, D/P, Western Union, Money Gram

现在联系
免费会员

联系人 Dinara

Shanghai, Shanghai

现在联系

详情

Dragline excavator.

In a typical cycle of excavation, the bucket is positioned above the material to be excavated. The bucket is then lowered and the dragrope is then drawn so that the bucket is dragged along the surface of the material. The bucket is then lifted by using the hoist rope. A swing operation is then performed to move the bucket to the place where the material is to be dumped. The dragrope is then released causing the bucket to tilt and empty. This is called a dump operation.

On crane-type draglines, the bucket can also be 'thrown' by winding up to the jib and then releasing a clutch on the drag cable. This would then swing the bucket like a pendulum. Once the bucket had passed the vertical, the hoist cable would be released thus throwing the bucket. On smaller draglines, a skilled operator could make the bucket land about one-half the length of the jib further away than if it had just been dropped. On larger draglines, this is not a common practice.

Draglines have different cutting sequences. The first is the side cast method using offset benches; this involves throwing the overburden sideways onto blasted material to make a bench. The second is a key pass. This pass cuts a key at the toe of the new highwall and also shifts the bench further towards the low-wall. This may also require a chop pass if the wall is blocky. A chop pass involves the bucket being dropped down onto an angled highwall to scale the surface. The next sequence is the slowest operation, the blocks pass. However, this pass moves most of the material. It involves using the key to access to bottom of the material to lift it up to spoil or to an elevated bench level. The final cut if required is a pull back, pulling material back further to the low-wall side

Send a direct inquiry to this supplier

至:

Dinara < Shanghai cenci trading >

我想知道: