Hydraulic Grab
It manufactures two main series of hydraulic grabs for cranes. During many years, we have designed and manufactured quality crane accessories and lifting equipment, which is robust, durable, and long-lasting, which is of big importance for our customers. Grab is the grab for bigger cranes and is made of high-strength materials and equipped with strong axles and bearings. Grabs are equipped with a built-in check valve inside the cylinder, which means that the load is retained even if a hose on the crane breaks. This crane grab is part of a robust bucket series with focus on construction work. Combi grab is particularly suitable for use in combination with smaller cranes and for different tasks. This grab has different tool designs depending on tasks. Read more about combi grab and its technical specifications by clicking here.
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![Hydraulic Orange Peel Grab]()
Hydraulic Orange Peel GrabThe hydraulic orange peel grab is an electro-hydraulic crane attachment. It gets its name from its orange-peel-like appearance when opening and closing. Specially designed for handling bulk...read more -
![Wireless Remote Control Orang Peel Crane Grab Bucket]()
Wireless Remote Control Orang Peel Crane Grab BucketThe wireless remote control grab integrates radio remote control technology with a single-rope grab for handling bulk materials.read more -
![Wireless Remote Control Grab]()
Wireless Remote Control GrabThe wireless remote control grab integrates radio remote control technology with a single-rope grab for handling bulk materials.read more -
![Electro-Hydraulic Clamshell Grab]()
Electro-Hydraulic Clamshell GrabThis equipment is specifically designed for the efficient handling of powder and fine bulk materials, including chemicals, fertilizers, grains, coal, coke, iron ore, sand, construction particles,...read more -
![Electro-Hydraulic Scrap Grab]()
Electro-Hydraulic Scrap GrabThe electric-hydraulic waste-to-energy grab is a sophisticated tool used in waste-to-energy plants to handle and process various types of waste.read more
Advantages of Hydraulic Grab
High operating productivity
Hydraulic grabs exhibit high operational efficiency, allowing for efficient gripping and lifting of materials.
Capability to lift heavy materials
These devices are capable of lifting and gripping a variety of heavy materials.
Long-term durability
Hydraulic grabs showcase excellent durability over prolonged usage.
Fast and stable operation
These devices operate swiftly and maintain stability during usage.
Remote control with useful features
Equipped with a remote control, these devices offer various useful features for enhanced usability.
Independence from external power sources
Hydraulic grabs can operate independently, eliminating the need for external power sources.
Our factory
Ifima Technology (Shanghai) Co., Ltd.(YFM) was established as an agent subsidiary of Jiangsu YFM group company focuses on expanding oversea market of the crane business. The factory covers an area of 18,000 square meters, with a scientific management team, advanced production equipment, exquisite technology, professional testing and inspecting equipment, as well as completed management system.
Our product
The company's main products are Marine cranes, port cranes, bulk cargo handling grab, and related customized steel structure products.
Our service
There is a skilled sales and R&D team focuses on providing solution-based services pre and after sale to our clients. In order to extend the service life of equipment, Our dedicated team will provide regular maintenance and repair service for your crane , this service is not limited to our products.
Our certificate
As a design and production enterprise of Marine and port equipment , it has been certified by Chinese CCS, American ABS, French BV, Norwegian DNV, British LR, Korean KR, Japanese NK, Russian RS and other classification societies.
How Does a Hydraulic Grab Work?
Hydraulic grab buckets have revolutionized material handling operations, offering efficiency and versatility. Among them, cactus grab buckets have gained popularity for their unique design. In this blog post, we will explore how hydraulic grabs work, delve into the specifics of cactus grabs, and discuss the capacities of these remarkable material handling tools.
Hydraulic grabs operate on the principle of hydraulic power. They consist of a hydraulic system that powers the opening and closing of the grab's jaws or tines. When activated, hydraulic fluid flows through the system, activating cylinders that control the movement of the jaws. This enables the grab to securely grip and release materials. The hydraulic control provides precise operation, allowing operators to adjust the grip strength and handle various materials with ease.
Selection of Hydraulic Grab
Hydraulic grabs, also known as electro-hydraulic grabs or electrically operated hydraulic grabs, are specialized material handling attachments used in various industries. They are designed to grab and transport bulk materials such as sand, gravel, scrap metal, and agricultural products. Hydraulic grabs offer several advantages over traditional mechanical or manual grabs, including increased efficiency, precision control, and reduced operator fatigue. These grabs are powered by an electric motor that drives a hydraulic system, which in turn operates the grabbing mechanism. The hydraulic system provides the necessary force and control to open and close the grab, allowing for efficient material handling operations. The electric motor can be powered by an external power source or integrated into the equipment on which the grab is mounted. When selecting a hydraulic grab, several factors should be considered:
Capacity and size
Determine the required capacity and size of the grab based on the type and volume of materials to be handled. Grabs are available in various sizes and configurations to suit different applications.
Grab design
Consider the design of the grab, including the number and shape of the jaws or tines. The design should be suitable for the material being handled and ensure a secure grip.
Control system
Evaluate the control system of the grab. Hydraulic grabs generally offer precise and responsive control, allowing operators to adjust the opening and closing of the grab with accuracy. Look for features such as proportional control or adjustable closing force.
Mounting compatibility
Ensure that the hydraulic grab is compatible with the equipment on which it will be mounted. Consider factors such as the hydraulic system requirements, weight limitations, and attachment mechanism compatibility.
Durability and maintenance
Assess the durability and maintenance requirements of the grab. Look for grabs made from high-quality materials that can withstand the demands of the application. Consider ease of maintenance, availability of spare parts, and the manufacturer's reputation for reliability.
Safety features
Check for safety features such as overload protection, emergency stop buttons, and guarding to ensure safe operation and prevent accidents.
Application specifics
Consider any specific requirements or challenges of your application. For example, if the grab will be used in corrosive environments, look for grabs with appropriate coatings or materials to resist corrosion.
Grabbing System of Hydraulic Grab
The grasping system of hydraulic grab, comprise the driving sensor assembly be arranged in driving, be arranged on the hydraulic grab sensor assembly in grab bucket, the data acquisition be connected with driving sensor assembly and hydraulic grab sensor assembly and monitored control system, the on-the-spot display terminal system be connected with data acquisition and monitored control system and grasping system autonomous cruise speed system.
Driving sensor assembly
This module comprises driving walking position sensor, grab bucket height sensor, load pulling force sensor; On the X-axis running gear driving wheel that driving walking position sensor is installed on driving respectively and Y-axis running gear driving wheel; Grab bucket height sensor comprises contact switch, capstan winch rotary angle transmitter; Load pulling force sensor is installed on capstan winch.
Hydraulic grab sensor assembly
Primarily of hydraulic pressure class sensor, electric information sensor, environmental classes sensor composition; Wherein, hydraulic pressure class sensor operationally carries out data acquisition by the operating oil pressure of critical component in hydraulic grab hydraulic efficiency pressure system (as Hydraulic Pump, conversion valve block, hydraulic actuating cylinder etc.) assembly; Electric system key component (as machine operation parameter, valve block working parameter etc.) to hydraulic grab is carried out data acquisition by electric information sensor; Environmental classes sensor will gather environmental classes parameter (as external temperature, ambient humidity etc.) parameter.
Data acquisition and monitored control system
This system is installed on driving top, is made up of data acquisition module, control module and communication module; Wherein, data acquisition module operationally gathers each sensor parameters by data line; The main function of control module is carry out when analyzing to the data gathered and each sensor numerical value allowable be recorded in register, be in the abnormal condition such as to transfinite when there being sensor parameters under, abnormal data is uploaded to on-the-spot display terminal by communication module by this module; Important process parts (as hydraulic actuating cylinder, Hydraulic Pump etc.) there is working parameter exception or accept on-the-spot display terminal uploaded halt instruction time, this system will initiatively cut off the control circuit of hydraulic valve block, thus realize system band Out of order, until completion system keeps in repair and removes diagnostic code; The main function of communication module is be connected with on-the-spot display terminal by Wireless/wired communication system.
On-the-spot display terminal system
This system comprises communication module, display module, GPS/GPRS module, data unofficial biography interface module; For realizing data long distance communication and storage, display relevant operating parameter and state of a control; Wherein, communication module is connected with data acquisition and monitored control system by Wireless/wired communication; Display module is used for display system state, each sensor parameters, the system whether information such as fault, when system jam, is reported to the police by display system; The main function of GPRS module is for be uploaded to remote terminal by long range data chain by system parameter and failure condition; Data unofficial biography interface reaches appointing system mainly through wired data transfer pattern by outside data.
Grasping system autonomous cruise speed system
This system is made up of communication module, industrial computer/PLC module; Wherein, communication module by the industrial field bus of standard or other communication modes and on-the-spot display terminal systematic connection, and by data upload to industrial computer; Automatically according to the master mode of writing in advance and control policy, all multi-execution components such as direction of travel, travel distance, grab bucket electromagnetic valve to grasping system control industrial computer; Thus complete the Automated condtrol of grasping system.
The Method of Work of the Grasping System of Hydraulic Grab
Semi-automatic work pattern
This mode of operation is mainly applicable to the face-to-face of the on-the-spot comparatively complexity of crawl or under putting operating mode (as garbage burning factory etc.), its groundwork flow process is as follows: Operating personal by observing the grab bucket position of adjustment hydraulic pressure grasping system, until grab bucket be moved to required for carry out the position that captures.
Operating personal captures instruction to industrial computer input, and now grasping system starts capstan winch automatically, and hydraulic grab is moved downward.Simultaneously by capstan winch rotary angle transmitter calculate hydraulic grab transfer distance. When high-volume reaching preset value under hydraulic grab, automatically start grab bucket hydraulic oil pump (pump control system) or open grab bucket hydraulic valve (valve control system), thus making grab bucket grab lobe to open, ready for capturing; hydraulic grab continues below, until contact with crawled thing, now, capture on thing, therefore load pulling force sensor output signal changes because grab bucket part mass acts on.Grab bucket descending until reach default load value, now capstan winch stops;start grab bucket hydraulic oil pump (pump control system) or open grab bucket hydraulic valve (valve control system), thus making grab bucket grab lobe to close up and complete crawl work.
Grasping system automatically starts capstan winch and makes hydraulic grab upward movement, simultaneously the total weight capacity of pulling force sensor record; when capturing quality and exceeding allowance, grasping system autonomous cruise speed system starts grab bucket hydraulic oil pump (pump control system) or opens grab bucket hydraulic valve (valve control system), thus make grab bucket grab lobe to open less angle, thus unclamp part and capture thing until reach the weight capacity of permission.
Full automatic working pattern
This mode of operation is mainly applicable to the comparatively simple point-to-point operating mode (as garbage burning factory etc.) in crawl scene, and its groundwork flow process is as follows: Operating personal specifies crawl position, provides control system crawl position coordinate; control system automatically completes road location by the walking position sensor unit in driving and controls feedback closed loop, and grab bucket is moved to above crawl position automatically; control system starts grasping system capstan winch by the pattern of writing in advance, and hydraulic grab is moved downward; simultaneously by capstan winch rotary angle transmitter calculate hydraulic grab transfer distance; when high-volume reaching preset value under hydraulic grab, automatically start grab bucket hydraulic oil pump (pump control system) or open grab bucket hydraulic valve (valve control system), thus making grab bucket grab lobe to open, ready for capturing.
Prolonging safe operation
Modern, orange peel grabs, commonly operated in waste applications, are essentially self-contained units with an electrical control being the only connection to the operating vehicle. The hydraulic reservoir, cylinders, pump and electric motor are all installed within the frame of the grab, ensuring the process to swap grabs is quick and simple. Depending on the application, grabs can operate for between 18 months and two years before a service is required. After this time, the tines or petals of the grab will have become worn, and some of the hydraulic circuits may leak. Whatever, the condition of the grab, it is important to complete regular maintenance checks to ensure continued safe and reliable performance.
Comprehensive inspection
To fully assess the condition of the whole grab, it is important to fully dismantle it down to individual component level. This allows every part to be cleaned and inspected, with special attention being paid to the dimensions of bushes, pins and pivot bores as well as the seals and dimensions of the hydraulic cylinders. For those defects that are more difficult to see, non-destructive testing (NDT) techniques, such as magnetic particle and liquid dye penetrant testing, should be used to discover any welds that have suffered from fatigue or excessive loads. This also applies to the hydraulic tank and the plate welds on the petals of the grab. While dealing with the hydraulic tank, it is important to thoroughly clean the inside of the tank to remove any contamination and get the grab ready for reassembly. At this point, it should be possible to put together a comprehensive list of work required to repair or replace all the worn components for the operator.
Good as new
Installing the new parts, either purchased or manufactured, is the beginning of a refurbishment; new pivot pins, bushings, and seals are used to reattach the petals to the main frame. The hydraulic cylinders are resealed, having re-chromed the rods if necessary, and comprehensively pressure tested along with the hydraulic power pack, the control valves and the reservoir. It is possible to record pump pressures as well as pressures on both sides of the cylinders with a hydraulic datalogger and provide the customer with a complete record of the results. At the same time, new hard-facing is applied to the petals. This cross-hatched welding increases the durability of the steel plates that are required to operate in such arduous conditions. The welding acts as a sacrificial surface that can be replaced during the refurbishment and prevents wear of the base material.
Our factory
Ifima Technology (Shanghai) Co., Ltd.(YFM) was established as an agent subsidiary of Jiangsu YFM group company focuses on expanding oversea market of the crane business. There is a skilled sales and R&D team focuses on providing solution-based services pre and after sale to our clients, The company's main products are Marine cranes, port cranes, bulk cargo handling grab, and related customized steel structure products. The factory covers an area of 18,000 square meters, with a scientific management team, advanced production equipment, exquisite technology, professional testing and inspecting equipment, as well as completed management system. As a design and production enterprise of Marine and port equipment , it has been certified by Chinese CCS, American ABS, French BV, Norwegian DNV, British LR, Korean KR, Japanese NK, Russian RS and other classification societies. "Quality first, Good faith, Be Customer-centric" as the corporate culture, YFM is committed to provide oversea customers with high-quality product and perfect services.
FAQ
As one of the leading hydraulic grab manufacturers and suppliers in China, we warmly welcome you to buy CE Approved hydraulic grab for sale here from our factory. All customized products are with high quality and low price.
scrap grab, buck cargo grab, clamshell grab