Marine welded drag heads design
|Terms of Trade:||FOB,CFR,CIF|
|Min. Order:||1 Piece/Pieces|
|Delivery Time:||30 Days|
|Packaging:||bulk package and bulk vessel transportation container package and container transportation|
|Place of Origin:||china mainland(zhejiang)|
Model No.: USA-227
In order to dredge in waves, the suction pipe is suspended from special davits, which operate with heave compensation to ensure that the drag head nozzles stay in contact with the sea bed. The control of mixture of water and sand is done by a so-called dredge drag head visor. The visor controls the amount of water that enters along with the sand. In some cases this visor is hydraulically controlled.
Classification of drag head
Universal Drag heads
Our universal drag heads offer a combination of high excavation capabilities for loosening the soil and optimized hydraulic properties for mixture transportation. High mixture concentrations are possible in many different kinds of soil. Concentrations are more stable even in more compact soils, where the water flap is blocked in an optimized position. Production can be optimized by controlling the contact force of the drag head to the ground through a swell compensator system.
The soil to be dredged is loosened by cutting teeth at the visor and the effect of pressure water supply through special nozzles. The visor is equipped with an adjustable water flap for the supply of additional transport water when dredging in soft grounds.
US Drag heads
Our US drag heads are particularly suitable for dredging firmly-packed and strongly-binding types of soil. Due to their modular design, the US drag head can easily be converted into a drag head with a turbulence visor or a universal visor. The US visor is equipped with knives and ripping teeth to loosen compact soils. Pressure water is used for fluidization of the ground. The US visor has adjustable water inlets on top, allowing the supply of additional transport water in soft grounds. Wide drag heads are equipped with two independent visors, so that the whole suction area is in close contact to the ground even on uneven ground.
The US visor is equipped with knives and ripping teeth to loosen compact soils. Pressure water is used for fluidization of the ground. The US visor has adjustable water inlets on top, allowing the supply of additional transport water in soft grounds.
Active Drag heads
Our active drag heads offer the highest production rates possible, even in compact soils and at varying dredging depths. The pressure nozzles can be arranged at the visor carrier and/or at the visor itself according to customers' preferences. The hydraulic power pack can be installed on deck or as integrated part of the drag head. Various control systems are available, enabling efficient use of the active drag head. The basic version of the control system includes continuous position indicators and switches for bridge desk mounting. Advanced dredge control and automation systems automatically adjust the visor position and water flap. Visor position can be controlled, for instance, with constant position, pre-selected grab depth or cylinder force and water flap position to suction pressure at the drag head.
We have a perfect managing system and quality control system which from initial work, to process control, to final control, forming the whole process traceability with a good command of quality and production schedule.
You can see the quality of all our previous orders were guaranteed based on our good procedure and service.
UniSite group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient.
Safety & quality are the key factors of UniSite group with good QHSE experience and ISO9001/BV certificate.
With professionalism, vitality, innovation, respect, team spirit, UniSite culture (corporate values, corporate philosophy and behavior shaping) is continuously developing, along with our company from its foundation.
UniSite group is able to offer our client best possible and most sustainable solutions to their requirement.
Photos of our Marine welded drag heads design
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Unisite Group Ltd.
UniSite group was established in 2008 in Ningbo - Chinese second largest port, dredging relevant products manufacturing & supplying since 2005, that is characterized by visible leadership, vitality, innovation, long-term vision and a sound financial position.
As an international partner, we are specialized in providing comprehensive service of dredging, land reclamation, offshore projects, marine engineering, piling works, municipal engineering, mechanical engineering, construction machinery, oilfield projects and environmental remediation projects.
The group has a perfect managing system and our staff who are professional in technology are committed, passionate, efficient. Thanks to the knowledge, the experience and the skills of our work team, we are able to offer our client best possible and most sustainable solutions to their requirement. We are one of the leading steel parts and service providers for dredging and marine engineering in China.
UniSite culture consists of corporate values, corporate philosophy and behavior shaping, which is the core of responsibility and breakthrough. Based on this core, with professionalism, vitality, innovation, respect, team spirit, UniSite culture is continuously developing, along with our company from its foundation.
Activities and projects
1)UniSite`s first core activity: serve for dredging and marine projects
Provide service and relevant parts for dredgers, including dredger construction, repairing and maintenance.
Provide items for dredging, land reclamation, offshore, marine engineering, piling works, municipal engineering, oilfield projects and environmental remediation projects.
Steel Structures and Pipes
Casting and Pump parts
Machining Parts whatever big or small
Piling and Parts
- Pontoon; Floating platform; Marine work platform; Buoy; Float; Fender
- Anchor box system;
- Sinker pipe line; Shore pipe line; Floating pipe line; Piling pipe; Sheet pile;
- Y piece; Bend; Fall pipe; Ball joint pipe;
- Rubber hose;
- Small dredger: standard cutter suction, bucket, grab, shovel stone, mud and stone construction
- Spud; CSD Spud;
- Suction pipe; Arm piece; Jet pipe;
- DW pipe; Wear resistant pipe; Structure pipe; Shipping building pipe;
- Pump; Pump spare parts(impeller, shell, casing, liner, cover)
- Branch casting pipe; Casting bend;
- Loading box; Bottom door; Overflow; Fender frame; Bow coupling; Anchor; Hopper panel; Basket; Bucket; Clamp ring; Drag head; Cutter head; Cutter ladder;
- Sliding piece; Gantry; Turning gland; Chute flap; Kingpin; Cutter platform; Water box; Bow coupling; Anchor; Hopper panel; Hopper door; Basket; Bucket; Bucket wheel; Clamp ring; Close plate; Gantry;Dredge gate valve; Valve body;
- Mooring system(mooring rope, mooring bollard, mooring winch, mooring fairlead, anchor windlass, chain stopper, roller fairlead, wheel fairleader, panama chock, marine mooring rope reel, anchor releaser, marine shutter, pipe clamp)
2) UniSite`s second core activity: serve for machinery and automobile projects
Provide service and relevant parts for mechanical engineering, construction machinery, agricultural machinery, port hoisting machinery, metallurgy, automobile, chemical, marine machinery.
Big Machining(machining center, boring and milling, lathe)
Small Machining(cnc, milling, grinding)
Casting (sand, investment)
Stamping and Bending
- Machinery Products(like Wind Turbine Generate System Hub, Wind Power Bearing Block, Punching Machine Sliding Block, Punching Machine, diesel power generator base, die casting machine base, injection molding machine base, punch, tank, pump parts, accumulators parts, valve parts, construction parts, agricultural parts etc.)
- Machinery Products
- Auto Products
- Shipping building Products
- Medical Products
- Oil Products
With about 10 years` experience, now our products and service are involved in many projects all over the world. Like:
1)Palm islands construction, World thousand islands construction, Australian coastline and port expansion, Gladstone project construction, Brisbane airport project construction, the Vietnamese government`s port expansion, Panama coastline expansion, Railway tunnel Schuman-Josaphat construction(Belgium), World`s first formal floating sea restaurant construction(Darling Harbour, Sydney), New Suez Canal project construction, Municipal tunnel projects construction(Alger)--
Production and equipment
pipeline production equipment
bending press equipment
CNC plasma cutting equipment
advanced paint room and equipment
Technology and Quality
Offering our client best possible and most sustainable solutions to their requirement. Production procedure
Step1: Drawing and technical requirement analysis, production lofting;
Step2: Material cutting, trimming, groove, cleaning, bending, rolling, dimension & NDT inspection
Step3: From part assemble to whole assemble with accurate template and platform, dimension & NDT inspection, welding, dimension & NDT inspection;
Step4: Casting, forging, stamping, machining if necessary
Step5: Final dimension & NDT inspection;
Step6: Surface treatment;
Step7: Package, Loading and Lashing when delivery;
UniSite have a perfect managing system and quality control system which from initial work.
ISO9001-2008/CCS; BV manufacturer capability qualification.
Taken part in the CHINA DREDGING ASSOCIATION
Quality, health, safety and environment (QHSE)
In-house safety training to our staff
Checking all the production equipment periodically
Preventing pollution, accidents and health hazards, auditing
In order to perform comprehensive service and relevant items to clients' satisfaction, UniSite knows the importance of advanced technology, equipment, quality and continuously invests in advanced production base and equipments. The group has a perfect managing system and quality control system which from initial work, to process control, to final control, forming the whole process traceability with a good command of quality and production schedule.
We are able to offer our client best possible and most sustainable solutions to their requirement.
- Company Name: Unisite Group Ltd.
- Representative: Yu ZHUOFANG
- Product/Service: Dredging Parts , Marine Engineering And Parts , Ship Building And Parts , Machining Parts , Casting And Pump Spare Parts , Piling Parts
- Capital (Million US $): 1,500,000
- Year Established: 2008
- Total Annual Sales Volume (Million US $): US$10 Million - US$50 Million
- Export Percentage: 91% - 100%
- Total Annual Purchase Volume (Million US $): US$1 Million - US$2.5 Million
- No. of Production Lines: 6
- No. of R&D Staff: 5 -10 People
- No. of QC Staff: 11 -20 People
- OEM Services Provided: yes
- Factory Size (Sq.meters): 10,000-30,000 square meters
- Factory Location: JiaoTou industry park, LiuHeng island, Putuo district, Zhoshan
- Contact Person: Mr. Kevin Mei
- Tel: 86-574-87053650
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