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What is the difference between the mechanical grabs and the hydraulic grabs?In terms of material handling, choosing the right grab can significantly affect efficiency and productivity.The two common types of grapple used in cranes are mechanical grapple and hydraulic grapple.Let’s explore their differences and understand when to choose each type.
First of all, let’s take a look at what is a hydraulic grab and a mechanical grab:
Overhead Crane Hydraulic Grabs
Electro Hydraulic Orange Peel Grabs
مقابض صدفية هيدروليكية كهربائية
مقابض كهروهيدروليكية مستطيلة الشكل
Hydraulic Round Nose Bucket
Overhead Crane Mechanical Grabs
دلو ميكانيكي مزود بأربعة حبال صدفية
قابض ميكانيكي بأربعة حبال لقشر البرتقال
قابضات ميكانيكية ذات حبلين
دلو حمل بحبل واحد
Overhead Crane Hydraulic Grabs
A set of lifting mechanisms, the hydraulic grab is installed under the hook using a hook, which is easy to disassemble, and the telescopic action of the hydraulic cylinder completes the opening and closing of the bucket.
It has a motor, a hydraulic pumping station, and a control valve, which is driven by an external power supply to open and close.
The hydraulic grabs are connected to the hydraulic circuit on the crane.
The operator can control the lifting, opening and closing, transfer and other actions of the hydraulic grab in the control room.
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It needs to be equipped with 2 sets of lifting mechanisms to open and close the mechanical grabs through the reel.
The mechanical grabs relies on mechanical connecting rods, pulleys, and levers for grasping action
Operated by direct physical force, it consists of two or more hinged arms with sharp or serrated edges, similar to the jaw of a creature, which can tightly clamp the material.
No hydraulic power or electrical connection is required. The operator manually controls the movement of the mechanical grab.
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Domestic waste treatment:
Grab cranes used in waste disposal in domestic waste incineration and power generation projects mainly grab domestic waste.
This is an intelligent product that can realize unattended operations.
Scrap steel and large stones:
In scrap yards and stone processing plants, materials of various shapes and sizes can be precisely controlled and efficiently processed.
Old battery:
It is more suitable for fine operation and accuracy, and reduces the risk of battery damage.
Food processing industry:
Grab pickles, pickles, and wineries for brewing.
Stainless steel is usually used to reduce pollution.
River decontamination:
It is very suitable for fine cleaning tasks, providing precise control to remove debris without disturbing the riverbed too much.
Light industry:
Grasping plastics is very suitable for high-precision processing of plastics, suitable for classification and fine operation.
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Waste treatment and classification:
Mechanical grappling hooks are good at handling bulk materials such as logs, scrap metal, rocks and debris.
Waste management facilities use grabs to sort and transfer recyclables, green waste, and construction waste.
Dismantle and deconstruct:
During the demolition project, the mechanical grab removes the building structure by grabbing and pulling the material.
The removal of concrete, steel beams and other components minimizes the need for labor and shortens the project schedule.
Loading and unloading:
The grab can effectively handle bulk cargo such as coal, grain and aggregates.
Forestry operations:
Efficiently load and unload logs to assist in the logging and transportation of wood.
They keep operators away from fallen trees and heavy logs, thereby improving safety.
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The hydraulic system has many mechanisms, and the maintenance is more cumbersome than the mechanical grabs.
The hydraulic system is more complex and the maintenance cost is higher, and it is prone to air intake and other failures during use.
Overhead Crane Mechanical Grabs
Compared with hydraulic grabs, mechanical grabs are simple to maintain and durable. Mechanical grabs are usually just a matter of wire rope wear. At that time, only the wire rope needs to be replaced.
The hydraulic grabs of the crane is controlled by a hydraulic system, which has the advantages of high precision and flexible operation. It is suitable for loading and unloading bulk cargo and occasions that require fine operation, but its structure is complex and the maintenance cost is high. The mechanical grabs relies on wire rope control, which is suitable for handling large pieces of materials and heavy-duty operations in harsh environments. The structure is relatively simple and the maintenance cost is low. When choosing, the type of grab to use should be determined according to the operation requirements, accuracy requirements, and operating environment.
وضح هدفك:before delving into the options, please clarify your specific requirements.Ask yourself:
نوع المادة المراد التقاطها | الاستيلاء على المواد | وزن السعة (طن/م³) |
ضوء | الكوك، الخبث، الحبوب، البطاطس، الجير الأنثراسيتي متوسط الجودة، الأسمنت، التربة، الحصى، الطين، الطوب المكسور، إلخ. | 0.5~1.2 |
واسطة | الخث، قطع كبيرة من الفحم الحجري، الفحم المضغوط، الطين، الحجر الجيري، الحصى، الملح، الحصى، الطوب، البوكسيت، رقائق أكسيد الحديد، الأسمنت، الرمل والطوب في الماء، الخ. | 1.2~2.0 |
ثقيل | الحجر الجيري، والطين الثقيل، والخامات الصغيرة والمتوسطة الحجم، والصخور الصلبة، وأكسيد الحديد على شكل قضيب، وخام الحديد، ومسحوق تركيز الرصاص، وما إلى ذلك. | 2.0~2.6 |
الوزن الزائد | خامات كبيرة، خام منجنيز كبير، مسحوق خام الرصاص المتكتل الرسوبي، الخ. | 2.6~3.3 |
التوافق مع الملحقات: تأكد من أن المقبض متوافق مع المعدات الموجودة.
اعتبارات الميزانية: يختلف نطاق الأسعار للمقبض. قم بموازنة ميزانيتك بناءً على وظيفة ومتانة المقبض.
التعليقات والاقتراحات: ابحث عبر الإنترنت، واقرأ تعليقات المستخدمين، واطلب الاقتراحات من نظرائك في الصناعة.
اذهب إلى الشركة المصنعة للرافعة لإجراء فحص واختبار في الموقع قبل الشراء: اختبار الأداة في ظل ظروف حقيقية قدر الإمكان. قم بتقييم أدائها وسهولة استخدامها ووظائفها بشكل عام.
ضع في اعتبارك أن اختيار المقبض المناسب يتطلب التوازن بين الوظيفة والسلامة والتكلفة. من خلال النظر في هذه العوامل، ستجد المقبض المثالي الذي يمكنه زيادة الإنتاجية وضمان التشغيل السلس.
We use 2 previous Dafangcrane projects to help you distinguish the selection.
التنوع المادي: The composition of domestic waste is complex, the moisture content is high, and the material diversity is rich, which requires a flexible grab for processing.The hydraulic grabs are multifunctional and can effectively handle materials of different types and states.
دقة وفعالية الاستيعاب: The hydraulic grabs can accurately control the grasping force and angle, and adapt to the fine operations required in the garbage disposal process, such as mixing, dumping, handling and stirring, to ensure uniform garbage composition.
قدرة معالجة قوية: يتم معالجة 600 طن من القمامة يوميًا، وتعمل المعدات لمدة تصل إلى 8000 ساعة. تلبي متانة وأداء القابض الهيدروليكي احتياجات العمليات عالية الكثافة.
السلامة والاستقرار: The hydraulic grabs operates smoothly, which can reduce the risk of material spilling and operation, improve work safety, and is suitable for handling domestic waste with high moisture content and large density changes.
التكيف مع بيئات التشغيل المعقدة: The hydraulic grabs can maintain efficient operation in a changeable working environment, especially suitable for garbage disposal, which requires frequent operation and flexible response to various materials.
العمليات طويلة الأمد وعالية التردد: The durability and stability of the hydraulic grab enable it to cope with long-term and high-frequency operations, reduce downtime, and improve overall work efficiency.
In summary, the choice of hydraulic grab is based on its comprehensive considerations of flexibility, high efficiency, durability and safety, which can effectively meet the complex and high-intensity operation needs of waste power generation projects.
Good sealing: materials such as metal powder are easy to scatter during handling, and the mechanical grabs has a simple structure and good sealing, which can effectively prevent materials from spilling and improve the cleanliness and safety of operations.
Cost-effectiveness: The purchase and maintenance costs of mechanical grabs are low, and they are suitable for operations with limited budgets and long-term and high-frequency use.
متانة: The grab wire rope adopts stainless steel temperature-resistant type, which is suitable for material handling such as metal powders that have high requirements for temperature and corrosion resistance.
Applicable environment: For metal powder in a dry state, the gripping force and stability of the mechanical grabs are sufficient to meet the needs, and the operation is simple and easy to maintain.
Work efficiency: The mechanical grab can quickly and efficiently complete the grabbing and handling of materials, improve the overall work efficiency, and is suitable for the rapid operation needs of industrial production lines.
In summary, the choice of mechanical grab is based on its comprehensive considerations of closure, cost-effectiveness, durability, applicable environment and operating efficiency, which can effectively meet the actual needs of metal powder magnetic material companies.
It is recommended to choose mechanical grabs in the following cases:
It is recommended to choose hydraulic grabs in the following cases:
In short, mechanical grabs and hydraulic grabs have their advantages in material handling. Evaluate your specific requirements, consider available equipment, and make an informed choice. Whether you choose the robustness and simplicity of the mechanical grabs or the accuracy of the hydraulic grabs, remember that the right grab can increase productivity and ensure smooth operation.
Dafang Crane offers a wide range of hydraulic and mechanical grabs, including various types of automated grabs designed to meet diverse needs. Whether you’re looking for efficient solutions for heavy lifting or specialized applications, we have the right equipment for you. Click on the image link below to explore our full selection and find the perfect grab for your business needs.
15 دلوًا مختلفًا للاستخدام في الرافعات.