The crane grab has a relatively complex operating mechanism, and the grab components must be integrated with absolute precision to achieve high work efficiency. Therefore, the maintenance and repair of crane grabs are crucial. Today, we will provide you with some information about crane grabs and a reliable service provider for crane grab repairs.
Structure of the Crane Grab
The basic structure of a crane grab includes the following components:
- Scoop
- Press rod
- Pully frame
- Grab head
- Steel wire rope
- Cylinders
- Control valve assembly
The operation of a crane grab is relatively complex and requires precise integration of the grab components to achieve maximum work efficiency. The manufacturing and installation process usually takes longer compared to a standard crane, leading to higher equipment costs. Although technological advancements have been made, there are still few devices that can replace crane grabs in the production process. As a result, it remains very important in the industrial sector in Vietnam today.
Types of Crane Grabs
Mechanical Crane Grab
- A mechanical crane grab operates without depending on gravity, and its closing and opening mechanism is very simple. The crane using a mechanical grab must have two reels to open and close the grab and lift it.
- It is capable of handling lightweight materials like construction sand or coal in thermal power plants, chemicals, and cement.
- Mechanical grabs can be integrated with remote control for easier and more efficient operation.
Hydraulic Crane Grab
- A hydraulic crane grab has a mechanism for closing and opening using a hydraulic motor to pump oil, and it integrates remote control to make operation and maintenance easier with lower costs. The steel structure of hydraulic grabs is made of highly wear-resistant steel, such as HB400.
- Hydraulic crane grabs are often used in light industries such as wood processing, sugarcane milling, and heavy industries like scrap metal unloading at ports, mining industries for limestone, coal, ore handling, or garbage collection in hydropower plants and dredging riverbeds.
Crane Grab Load Capacity
Crane grabs come in various load capacities, with the most common standard capacities listed below:
- 2 tons, with a grab volume of 0.5 m3 – 1.2 m3
- 5 tons, with a grab volume of 1.5 m3 – 2.5 m3
- 7.5 tons, with a grab volume of 2.5 m3 – 4.0 m3
- 10 tons, with a grab volume of 4.0 m3 – 6.0 m3
- 15 tons, with a grab volume of 6.0 m3 – 8.0 m3
- 20 tons, with a grab volume of 8.0 m3 – 10.0 m3
- 25 tons, with a grab volume of 10.0 m3 – 12.5 m3
- 30 tons, with a grab volume of 12.5 m3 – 15.0 m3
- 50 tons, with a grab volume of 15.0 m3 – 20 m3
Common Malfunctions of Crane Grabs
Due to their technical characteristics, crane grabs can handle materials with high bulk density, large granule sizes, and high flowability, making them highly versatile for handling and loosening materials that tend to harden. However, in practice, after continuous use, grabs often encounter malfunctions. Common issues include deformation of the four support plates connected to the grab body, misalignment of the grab wings, damage to the axle supports, and rapid wear of the bearing bushings. These issues may cause the grab to get stuck and unable to open or close.
To repair the grab, it is necessary to disassemble the grab’s structure, remove the grab components, cut the damaged sections, and straighten the connecting bars. This repair process requires significant time and costs and requires a high level of expertise.
Sơn Tùng Provides Professional Crane Grab Repair Services
With its manufacturing scale and expertise in providing all large lifting equipment in Vietnam, along with a highly skilled engineering team with many years of experience, Sơn Tùng is proud to offer excellent options to its customers.
Sơn Tùng specializes in providing crane grab repair services, handling all issues related to electrical, mechanical, and hydraulic components for all types of grabs, including hydraulic grabs, electric grabs, scrap handling grabs, and automatic grabs. In addition, the company also provides maintenance services for crane grabs at optimized costs.
In addition to crane grab repair services, Sơn Tùng also specializes in:
- Design and manufacturing of crane grabs: a leading unit in designing and manufacturing crane grabs based on customer requirements.
- Crane grab rental: renting various grab types with common volumes ranging from 4m3 to 25m3.
Sơn Tùng’s Crane Grab Repair Service Process
The process of providing crane grab repair services usually includes the following steps:
- Receiving Information: The customer contacts Sơn Tùng to report a malfunction or repair need.
- Device Inspection: Technicians will come to the site to check and assess the condition of the grab, then propose a repair plan and provide a quote to the customer.
- Agreement: After the customer agrees to the repair plan and costs, Sơn Tùng will create a contract with the customer to finalize terms and timelines.
- Repair Execution: Technicians will carry out the repair based on the agreed plan, which includes inspection, maintenance, and replacement of faulty parts.
- Inspection and Handover: After completing the repair, Sơn Tùng will check the entire system to ensure stable and safe operation before handing the grab back to the customer.
- Maintenance and Support: Sơn Tùng will continue to provide maintenance and support if the customer requires assistance during the grab's operation.
This is some information about crane grab repair services that Sơn Tùng would like to share. For further consultation, please contact us via the hotline at 0913 602 660 for quick assistance.
