- Provide consulting and design service before sales, and provide scheme support to customers according to their working conditions and needs.
The hydraulic system of the Leader dredger is distributed throughout the dredger and is the core control system of the entire ship. The hydraulic system is a systematic project, which is highly professional and comprehensive.
The complete hydraulic system of sand dredger for sale includes five parts, namely power components, executive components, control components, auxiliary components (accessories) and hydraulic oil.
The function of the power element is to convert the mechanical energy of the prime mover into the pressure energy of the liquid. The pressure energy refers to the oil pump in the hydraulic system, which provides power for the entire hydraulic system. The structure of hydraulic pumps usually includes gear pumps, vane pumps, plunger pumps and screw pumps.
The function of the executive components (such as hydraulic cylinders and hydraulic motors) is to convert the pressure energy of the liquid into mechanical energy and drive the load to perform linear reciprocating or rotational movement.
Control components (ie various hydraulic valves) control and regulate the pressure, flow and direction of the liquid in the hydraulic system. According to different control functions, hydraulic valves can be divided into pressure control valves, flow control valves and directional control valves. Pressure control valves include safety valves (safety valves), pressure reducing valves, sequence valves, pressure relays, etc.
Flow control valves include throttle valves, regulating valves, diverting and collecting valves. Directional control valves include check valves, hydraulic control check valves, shuttle valves, reversing valves, etc. According to different control methods, hydraulic valves can be divided into on/off control valves, fixed value control valves and proportional control valves. .
Auxiliary components include fuel tanks, oil filters, coolers, heaters, accumulators, oil pipes and pipe joints, sealing rings, quick-change joints, high-pressure ball valves, hose assemblies, pressure measuring joints, pressure gauges, oil level gauges, Oil thermometer, etc.
Hydraulic oil is the working medium that transfers energy in the hydraulic system. There are various types of mineral oils, emulsions and synthetic hydraulic oils.
The dredging system is divided into a control system and a monitoring system, which is a highly integrated system.
Through the monitoring system, you can understand the working status of all components of the whole ship, the working status of the main and auxiliary engines, the real-time status of the hydraulic system, the condition of the electrical circuit system, the running status of the pump, the working status of the gear box, the cooling system, etc.
At the same time, the centralized control unit controls the working parts of the dredger in real time through the operation lever and the like. One person can operate the parts of the entire ship.
The electrical system of the dredger consists of a main generator set, a backup generator set, an electrical cabinet, a charger and an operating console.
In order to improve the power supply efficiency of the sand dredger for sale power station and ensure the safety, stability, balance and continuous power supply of the entire ship, the dredger power station is equipped with a power management system for the entire ship’s electrical power. The system is designed for fully automatic management according to requirements.
(1) Separate the main high-power equipment from the ship’s sensitive equipment, such as generators, transformers, frequency converters and motors.
(2) Take isolation and filtering measures for the auxiliary power supply used by the electric propulsion system equipment to avoid using the same power supply with sensitive electronic equipment.
(3) The power generation equipment on the ship, the motor base and shell, the switch cabinet shell, the exposed metal lighting, the metal appearance and shielding layer of all cables, etc. should be grounded, and the metal grounding conductor should be connected to the hull to obtain the smallest ground resistance . The goal
(1) Good economic benefits.
(2) High reliability, high degree of automation and good operability.
(3) Low noise and low vibration.
(4) Wide speed range, large driving force, easy forward and reverse rotation, small size, flexible layout and convenient installation.
(5) Low emission and environmental protection.
Anchor rod system
Flowmeter, concentration meter
The lower end of the full range of Leader Dredger dredger spud is made of solid steel to ensure sufficient strength when penetrating the ground. When lifting the pile head, water can overflow from the two holes above the lower point. At the top, the hoist ring allows the crane to easily change the pile head.
1. Made of high-quality steel with high strength and wear resistance. Customers can also order other materials.
2. Longer service life and easy maintenance.
3. Simple disassembly and assembly, can be accurately adjusted.
Leader Dredger space is far superior to European and American ships, this design is more convenient for good ventilation system and maintenance of cabin components.
Reasonable layout of engine, hydraulic, circuit cold area system, etc., easy to locate and maintain system problems
The Leader Dredger full range of dredging boat Driving cabin has more field of vision, which is convenient for viewing more external conditions.
The extremely simple control system allows the driver to better operate the dredger.
Provide drivers with a high-quality working environment, and equipped with air conditioning.
Sand Dredger winches are hydraulically driven.
According to the position and function of the dredger, the working winch is divided into the bridge hoisting winch, the lateral shifting working winch, the anchoring winch, and the positioning pile hoisting winch.
Various working winches can be steplessly adjusted within a certain rope speed range, and are equipped with manual stop pins.
The main features of the winch are:
1. Small size
3. Strong and wear-resistant
5. Safe and convenient
6. Fast maintenance
1. The whole ship adopts assembly design, which is convenient for road transportation and expands the scope of use of dredgers. The upper part of the floating bridge is connected by bolts, and the lower part is connected by connecting blocks. The manufacturing and assembling precision of this connection block is very demanding.
2. Except for the beam arch on the top of the wheelhouse, all decks and cabins are not equipped with beam arches. This is because the main scale of the ship is small and assembled, because the area of the deck and the cabin is not large. It is not suitable for forming a catchment area, and the flat deck greatly shortens the manufacturing cycle.
3. The hull frame beam is basically made of section steel. Section steel can save a lot of welding and straightening time, and at the same time can improve the quality of the beam, which is very important for the quality of the cutter head dredge.
Leader Dredger dredging equipment uses diesel engines.
When we choose the engine brand, we will test the engine performance
1. Matching degree with dredging pump
2. Is the engine power output stable?
3. Continuity of trouble-free operation
4. Fuel consumption
6. Volume and weight
7. After-sales response speed
8. Maintenance costs
A better engine can ensure the practicality, economy and rationality of the cutter dredger
Dredging pump is one of the main working parts of cutter dredger. Power consumption generally accounts for 60% to 70% of the energy supply of the whole ship, and its working characteristic parameters roughly represent the performance of the dredger
The shell of the double-shell pump is not in contact with the mud and is not subject to abrasion, so the double-shell pump is much safer than the single-shell pump. With the protection of the outer shell, the inner shell can be fully utilized. At the same time, the use of high wear-resistant materials for the inner shell can greatly extend its service life, reduce the operating cost of the dredger, and improve the safety performance of the cutter dredger.
In the design and selection of the suction pump, we will select reasonable parameters according to various conditions such as the dredging depth, soil condition, output, and discharge distance of the customer's construction project. And determine the best working condition point of the mud pump, so as to make the whole ship have better economy.
For example, if the discharge distance of a certain project is far, if you blindly increase the head of a single pump, it will inevitably increase the power and invest more in single-party costs for future projects that are not of this type.
Concentration and efficiency are two very important parameters of the suction pump. It is far more economical to increase the concentration percentage point than to increase the efficiency percentage point of the suction pump.
The cutter head of the cutter suction dredger is divided into: cutter type dredging tool, bucket wheel type dredging tool
Among them, the cutter type is the most common. Different dredging tools have different impacts on construction requirements and the surrounding environment. A reasonable dredging tool should be selected in the dredging project. The reamer head will always be affected by several inherent factors in the design process:
1. Shaft power of reamer
2. Power of the mud pump
3. The diameter of the suction pipe and the diameter of the discharge pipe
4. The specific shape and structure of the dredger cutter head
5. The shape and position of the suction port of the reamer head
6. The soil quality of the construction project, the depth of dredging, etc.
Among the hydraulically driven dredgers, they are mainly driven directly by a low-speed high-torque motor or driven by a gearbox decelerated. When using hydraulic drive, we will install the drive device close to the cutter head in order to better adjust the angle of the digging state. This is especially important when designing the minimum digging depth of the dredger.
Regardless of the dredging tool, it plays an extremely important role in the performance of the cutter suction dredger. Therefore, Leader Dredger has extremely high requirements for the selection of cutter heads:
1. Small leakage
2. The inhalation resistance and the possibility of blockage are small
3. Match cutting power with power equipment
4. Made of wear-resistant materials
5. Reamer head produced by floating ring seal technology
6. Hydraulic power drive
6. Fine manufacturing, simple installation, quick replacement
There are 32 people in the technology and design department
12 senior technicians
Can design and have all kinds of dredgers, civil, warships, marine engineering equipment qualifications.
We can do different types of China Classification Society CCS, American ABS, European BV, Italian RINA standard ships, dredgers, ships, etc.
The design of the cutter suction dredger involves disciplines such as mechanical manufacturing, electrical and electronic, hydrodynamics, computer technology, automation science, materials science, marine meteorology and even nuclear physics, and belongs to the category of system engineering design.
Leader Dredger specializes in analysis and design of dredger hull size, winch bridge, winch system, hydraulic system, positioning pile, mud pump system and its professional design, And repeatedly debug the power system, environment, vibration and noise issues
According to the dredging volume, digging depth index and soil quality of the construction project, the specific performance indexes such as the digging depth, soil breaking capacity and production capacity of the cutter suction dredger are determined.
This design concept is not only widely used in general commercial dredging fields, but also in military, scientific research and engineering fields.
The difference is that dredgers that serve commercial projects can improve the performance of cutter suction dredgers to achieve higher production efficiency and economic benefits, while dredgers used in military and scientific research fields can meet the needs of specific projects. Its economic performance is relatively lower.
In the current economic and social environment, a design that only focuses on technical performance without considering product economic indicators is almost impossible. The cutter suction dredger design is also based on practicality, reliability and other technical indicators, fully considering the economic performance in use, and weighing the unified indicators of technical performance and economic performance to achieve better design results.
For more details, please visit -Technical innovation of Leader Dredger
The main services we provide are:
a. We guarantee that the free warranty period for fast wearing parts and non-human damage parts is 1 year. Including all hydraulic parts, all electrical parts, all wearing parts and wearing parts
b. One year later, spare parts will be provided at cost price. Like the engine and gearbox, there is after-sales service in the local area. We will first judge the problem and contact their personnel to save time for resolution
c. Lifetime free consulting service, after-sales service, operation guidance
Leader Dredger has 20 years of experience in the dredger production industry and can provide customized dredger production services for the most demanding projects. It is different from other manufacturers that can only produce standard dredges. Leader Dredger has a design and production team composed of more than 70 people, and has completed the design and manufacturing of more than 100 dredgers.
For more details, please visit -Dredge Service of Leader Dredger