12cbm/24cube Four Ropes Mechanical Double Scoop Clamshell Grab for Bulk Cargo with CCS BV ABS Approved for Sale

Product Description

Product Description
The Four ropes clamshell mechanical grab :
The four rope double-scoop grab is widely used in various settings such as docks, steel plants, power plants, ships, and bulk cargo storage yards. Its characteristics of high efficiency, stability, and strong adaptability make it one of the important tools in the field of bulk cargo handling.
1. Operating Principle
The four rope clamshell grab operates through two sets of steel wire ropes (each set consists of two ropes) to achieve its opening, closing, lifting, and lowering movements. One set of ropes serves as support ropes, responsible for maintaining the grab's balance and stability, while the other set functions as opening and closing ropes, controlling the grab's opening and closing actions.
Structural Characteristics:The four-cable double-shell grab is primarily composed of a balance frame, upper support beam, support rod, lower support beam, upper and lower pulley blocks, and a double-shell bucket body. The double-shell bucket body opens and closes like a clam, with a beveled cutting edge at the front, which facilitates insertion into materials, reduces resistance, and enhances excavation force. Additionally, the grab adopts three-dimensional virtual design and undergoes strength checking and analysis using professional software to ensure reasonable weight distribution and a long service life.
Product Parameters

Four rope clamshell grab
Volume	m3	2	2.5	6.3	8	10	15
Close height A	mm	2010	2690	3433	3522	3867	5066
Open height B	mm	1940	2330	2586	2578	2811	4649
Close width C	mm	1750	2170	2975	3198	3480	4579
Open width D	mm	2630	2820	4633	4932	5408	5952
Nubmers		6	6	6	6	6	6
closed form		Full closed	Full closed	half closed	half closed	half closed	half closed
Closing time	sec.	11	11	13.5	13.5	19	19
Opening time	sec.	9	9	9	9	11	11
Dead weight	kg	1700	1950	4800	5250	6940	8000
Control mode		valve control	valve control	valve control	valve control	valve control	valve control
Motor rating	kw	11	15	30	30	37	45

Detailed Photos
The working principle of the four-cable double-shell grab is relatively simple. Two double-drum reels on the crane release four steel wire ropes, two of which are connected to the support ropes to maintain the balance of the grab, while the other two are connected to the opening and closing ropes to control the opening and closing of the grab. When the opening and closing ropes descend, the grab opens for unloading; when the ropes ascend, the grab closes for grabbing materials. The closing force of the grab is achieved through the force amplification effect of the upper and lower pulley blocks, and a higher ratio results in greater excavation force.
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