Excavator attachments - The evolution theory of Lotus grab
——See how this' Iron Lotus' transforms excavators into grasping masters
At a construction site, a 23 ton excavator is using its five petal lotus shaped grab bucket to "eat" steel and cement blocks. With one opening and one closing, two tons of construction waste were steadily thrown into the transport vehicle, and the entire process took less than 15 seconds. The boss praised that since equipping this 23 ton excavator with a lotus grab bucket, not only has the cleaning efficiency doubled, but the scrap steel recycling alone earns more than 40000 yuan per month. This thing has now become his' profit responsibility 'on the construction site.
Material Evolution: The Transformation from Ordinary Steel to Wear Resistant Alloys
In the early years, the lotus grab bucket was made of ordinary steel, which would be worn out after three months of drying. Now it's different. Mainstream manufacturers like Jining Xinchangqing directly apply high-strength wear-resistant steel with a Brinell hardness of 400-500HB. The surface of the teeth is also welded with tungsten carbide to deal with "hard lumps" such as steel slag and gravel, and the service life is directly extended by more than twice.
The structural design has also become smarter. The top of the five petal grabbing plate is made at a 72 degree angle, and ribs and reinforcing blocks are added to ensure more even force distribution when grabbing scrap steel. Previously, a 15 ton excavator used a grab bucket to load and unload scrap iron, often afraid of "flashing its waist". Now, it can confidently grab up to 2.3 tons - this is almost its own limit.
Technological breakthrough: Three challenges have been overcome
Oil pipe disorder problem
In the past, a hydraulic cylinder dragged a hose, and a five flap grab bucket was like five braids, tangled together as a common occurrence. Yantai Maibo Machinery has developed a centralized oil supply system: the inlet pipe is connected to a circular oil circuit, and the five claw arms share a main oil circuit. When the 23 ton excavator is equipped with this grab bucket, it will no longer bundle itself into Zongzi when rotating.
The embarrassment of unstable grip on small objects
Scattered steel bars and screws fell to the ground, and the lotus grab bucket stared blankly. Last year's newly released hydraulic magnetic suction model directly added an electromagnetic disc to the grab bucket. By relying on the 23ton excavator's own hydraulic oil to generate electricity, a 12kN magnetic force is generated, allowing for simultaneous gripping and suction. After trying it out, the worker said, "Even screw caps can't escape from the scrap pile
The old problem of always deviating positioning
Jinshan Heavy Industry has solved this problem with a new patent this year - installing adjustable positioning rods at the four corners of the grab bucket. For example, when a 15 ton excavator is clearing silt in a narrow alley, the positioning rod is retracted to accurately grasp without touching the wall; When we arrive at the open material yard, we can start digging quickly on a large scale.
Tonnage matching: Small excavation and large excavation show their respective abilities
15 ton excavator: most suitable for QK06 grab bucket, weighing about 950kg, with a width of 1.7 meters for opening and closing. The hydraulic flow rate is adjusted to the range of 60-120L/min, and it can hold 50 tons of sand and gravel in one hour, requiring five strong laborers.
23 ton excavator: directly loaded onto QK08 or QK10, with a capacity of 800-1000 liters. Actual measurement at a certain mining dock: A 23 ton excavator equipped with a five flap grab bucket can unload a ship of 3000 tons of river sand in just six hours, which is three times faster than a crane.
Money making scenario: from steel mills to photovoltaic construction sites
Scrap steel factory "gold sucking king": Hebei Bazhou scrap steel base, with ten crawler excavators equipped with five flap grab buckets working day and night. The boss has calculated: a single machine can catch 200 tons of scrap steel per day, with a sorting efficiency 30% higher than that of an electromagnetic crane, and can recoup costs in six months.
River dredging tool: When the lotus petals are closed tightly, the mud and sand do not leak. Jiangsu Water Conservancy Engineering uses a 15 ton excavator with four flaps for dredging, with a capacity of up to 50 workers and no need to venture into the river.
Photovoltaic pile foundation divine operation: Shandong Liaocheng Photovoltaic Field, 23 ton excavator grab bucket replaced with spiral drill (quick change joint switched in 30 seconds), drilling during the day and backfilling at night, shortening the construction period by 40%.
Maintenance tips: Saving is earning
To be able to beat butter, oil the hinge pin shaft every 8 hours after drying. The grab bucket must be inserted into the material pile and pressed tightly before beating - otherwise butter will be sprayed back into the hydraulic system, and the valve will need to be repaired;
Always keep sealing rings: O-rings and thrust rings are the most wear-resistant, so prepare three to five sets on site. A crawler 15ton excavator in a mine in Yunnan was paralyzed due to seal failure and hydraulic oil leakage;
Soft start lifespan: idle for two minutes before starting up, and then slowly apply pressure. Especially in winter when the temperature is below -10 ℃, directly pressing the full throttle may cause the oil pipe to crack.
List of vulnerable parts: focus on four items
Grab the tooth tip - replace it immediately if 1/3 is worn off, and weld and reinforce the support shortly;
Articulated pivot - if the gap exceeds 3mm, it will shake and damage the oil cylinder ear plate;
High pressure oil pipe - surface cracking is dangerous, with losses of tens of thousands in one burst;
Electromagnetic coil (magnetic suction type) - Abnormal decrease in resistance indicates that a short circuit is imminent.
The future is here: lightweight and intelligent grasping
The carbon fiber grab board has started trial use, which can reduce the weight of the grab bucket of a 15 ton excavator by 30%, and save fuel and money for two sets of tooth tips in one year. Sany Laboratory is still testing an AI grasping system: it recognizes the shape of materials through cameras and automatically adjusts the grasping force - for example, increasing pressure when grabbing scrap steel bars, and loosening and preventing breakage when moving wood. Next year, it may be assembled onto a 23 ton excavator, and even novice construction workers can achieve the level of experienced workers.
The evolution of this' Iron Lotus' is not yet complete. From steel mills to rivers, from small excavators weighing 15 tons to the main force of 23 ton excavators, it transforms excavators from simple excavators to multi skilled grippers. Bosses who know how to maintain understand that every minute and liter of oil saved by the grab bucket ultimately turns into real gold and silver.
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