Product Description
A Hydraulic Multi-Petal Grab is a specialized device that utilizes hydraulic systems to drive multiple jaw plates (typically 3-8 petals), designed for efficient handling of irregular or large bulk materials such as scrap steel, ores, construction waste, and municipal solid waste. Compared to dual-flange grabs, its multi-petal structure provides superior material containment and extraction from complex geometries, making it particularly suitable for applications in scrap recycling, port operations, and mining industries.
1. Structure and Composition of Hydraulic Multi-Petal Grab
The Hydraulic Multi-Petal Grab is mainly composed of the following parts:
Multi-Petal Jaw Plates (3-8 petals):
Made of high-strength, wear-resistant steel, the number of petals can be customized according to demand (typically 4–6 petals).
The shape of the jaw plates can also be customized (e.g., pointed tooth type, flat mouth type, or arc type) to adapt to different materials.
Hydraulic Cylinder:
Each jaw plate is driven by an independent or linked cylinder to ensure synchronous closure.
The number of cylinders usually matches the number of jaw plates (e.g., a 6-petal grab may use 3 cylinders, each driving two petals).
Hydraulic Control System:
Includes a hydraulic pump station, control valve, high-pressure oil pipes, etc., for precise control of opening and closing.
Rotating Mechanism (Optional):
Some grabs are equipped with hydraulic rotary motors to achieve 360° rotation, improving operational flexibility.
Protective Components:
Sealing and wear-resistant linings are included to extend the service life.
2. Working Principle of Hydraulic Multi-Petal Grab
- Open State: The hydraulic system is depressurized, the cylinder retracts, and the jaw plates open under their own weight or with the assistance of a spring.
- Material Grabbing: The grab descends onto the material pile. The hydraulic pump station supplies oil, the cylinder pushes the jaw plates inward to close, and the material is enclosed and grabbed.
- Lifting: The cylinder pressure is maintained to ensure the grab remains closed. The crane then lifts the material to the target position.
- Unloading: The hydraulic system releases pressure, and the jaw plates open under gravity or with the help of an auxiliary mechanism to complete unloading.
3. Main Features of Hydraulic Multi-Petal Grab
Adaptability to Complex Materials
The multi-petal structure can better grasp scrap steel, large pieces of ore, construction waste, and other irregular materials.
High Gripping Force
Hydraulic drive provides strong closing force, making it suitable for heavy materials.
Precise Control
The opening and closing angle can be adjusted to achieve partial opening or closing, which is ideal for delicate tasks (e.g., scrap steel classification).
Optional Rotation Function
Grabs equipped with a rotating mechanism can adjust the material delivery angle, improving operational efficiency.
4. Application Scenarios of Hydraulic Multi-Petal Grab
- Scrap Steel Recycling: Grabbing crushed cars, metal waste, etc.
- Port Handling: Processing large pieces of ore, scrap metal, etc.
- Construction Waste Disposal: Grabbing concrete blocks, steel bars, bricks, and stones.
- Mining Operations: Loading irregular ore and gravel.
- Municipal Waste Treatment: Used for garbage sorting and transfer.
5.Main Specifications and Technical Parameters
The bulk density of scrap steel is typically about 3.0 t/m³.
|
Model |
Bucket Capacity (m3) |
External Dimensions (mm) |
Weight (kg) |
Motor Power (kw) |
Closing Time (s) |
Working Oil Pressure (kg/cm2) |
Rated Lifting Capacity (t) |
||||||
|
A |
B |
C |
D |
Safe Open |
Half Close |
Safety Shutdown |
380V50Hz |
440V60Hz |
|||||
|
DYD5[1]2 |
1 |
1786 |
2784 |
3050 |
2860 |
1950 |
2000 |
2150 |
15 |
18.5 |
17 |
200 |
5 |
|
DYD8[1.5]3.2 |
1.5 |
1925 |
3448 |
3141 |
2746 |
3000 |
3200 |
3400 |
18.5 |
21 |
20 |
200 |
8 |
|
DYD10[2]4.2 |
2 |
2241 |
3565 |
3214 |
2876 |
4000 |
4200 |
4300 |
22 |
26 |
16 |
200 |
10 |
|
DYD16[3.2]5.5 |
3.2 |
2450 |
4180 |
3205 |
2694 |
5300 |
5500 |
5700 |
37 |
43 |
18 |
200 |
16 |
|
DYD20[4]7 |
4 |
2840 |
4505 |
3850 |
3282 |
6800 |
7000 |
7200 |
37 |
43 |
25 |
200 |
20 |
|
DYD25[5]8.8 |
5 |
3020 |
4787 |
4165 |
3663 |
8500 |
8800 |
9200 |
45 |
52 |
22 |
200 |
25 |
|
DYD30[6.5]9.8 |
6.5 |
3070 |
5200 |
4230 |
3700 |
9500 |
9800 |
10200 |
45 |
52 |
25 |
200 |
30 |
|
DYD40[8]11 |
8 |
3455 |
5406 |
4490 |
3850 |
10500 |
11000 |
11500 |
52 |
55 |
25 |
200 |
40 |
Note: It can be customized according to customer needs
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