High Efficiency and High Quality Cutter Suction Dredger [Exported to Asia]

• Customization: Available
• Type: Cutter Suction Dredger
• Power Type: Diesel
• Model NO.: 07022216
• Cyclone Type: Hydrocyclone
• Slot Type: CTN
• Customized: Customized
• Condition: New
• Warranty: 365day
• After-sales Service: Lifetime After-Sales Service
• Working Environment: Underwater Operations
• Main Structure: Shipboard
• Output System: Fully Hydraulic
• Company Output: 180 Ships Per Year
• Transport Package: Container Shipping
• Specification: 10m-30m
• Trademark: HHIE
• Origin: China
• Production Capacity: 300cubic Meters Per Hour
• Package Size: 12.00cm * 1.80cm * 1.60cm
• Package Gross Weight: 6000.000kg

Product Description

   
 Welcome very much to our company's international website. If you need a dredger, please take a look below. We are a professional shipyard from China, and we believe there will be products suitable for you!

Company Profile

 

China Shandong Haohang Intelligent Equipment Co., Ltd
 
We have been engaged in the manufacturing of dredgers for over 20 years, and we believe that we are the most professional. Our main products include: cutter suction dredgers, chain bucket sand mining ships, water purification ships, water transport ships, gold mining ships, sea sand desalination equipment, etc!
Our profession is extracting sand from water, extracting various minerals, long-distance transportation in water, and cleaning weeds on the water surface!

To eliminate the problem of low sand pump flow caused by pipeline blockage, the following steps can be taken:

1. Appearance inspection
-Visually inspect the pipeline from beginning to end to see if there is any obvious deformation, damage, or foreign object adhering to the pipe wall.

2. Tap to listen to the sound
-Gently tap the pipe with a tool and listen for the sound. If the sound is dull, it may indicate internal blockage; If the sound is crisp, it usually indicates that the pipeline is unobstructed.

3. Segmented investigation
-Divide the pipeline into several sections and inspect each section in sequence. You can check for accumulated sand or debris inside by dismantling flange connections or detachable joints.

4. Reverse flushing
-For some detachable pipelines, you can try backwashing from the outlet end to see if the blockage can be flushed out.

5. Pressure detection
-Install pressure gauges at different positions in the pipeline and compare the pressure values at each point. If the pressure drops significantly in a certain section, there is likely to be blockage in that section.

6. Observing imports and exports
-Check the inlet and outlet of the pump to see if there are any foreign objects or filter screen blockages.

7. Comparative analysis
-Compared to the normal operation of pipelines in the past, including parameters such as flow rate and pressure, as well as performance in terms of appearance and sound.

8. With the help of tools
-Tools such as a pipeline endoscope can be used to directly observe the condition inside the pipeline to determine if there is any blockage.

Through the comprehensive application of the above methods, the problem of low flow rate of the sand pump caused by pipeline blockage can be accurately judged and eliminated.

Chinese made dredgers not only occupy an important position in the domestic market, but also have been widely recognized in the international market. At present, it has been sold to 68 countries and regions worldwide and has achieved success. These dredgers are widely used in deep-sea sand mining, coastal deepwater port channel dredging, reclamation, and coastal maintenance projects, making important contributions to China's marine engineering and infrastructure construction. We can tailor the most cost-effective dredging equipment for you based on your construction environment and work requirements!

 The pressure and flow rate of the sand pump can be adjusted in the following ways:

1. Adjust the speed
-Adjust the motor speed through a frequency converter or by changing the pulley transmission ratio of the motor. An increase in rotational speed usually leads to an increase in flow rate and pressure; As the speed decreases, the flow rate and pressure decrease accordingly.

2. Adjust the opening of the outlet valve
-Gradually closing the outlet valve will increase the pump's outlet pressure, but at the same time, it will decrease the flow rate. On the contrary, gradually opening the outlet valve will result in a decrease in pressure and an increase in flow rate.

3. Replace the impeller
-Choose impellers with different diameters or blade shapes. Increasing the diameter of the impeller generally increases the flow rate and pressure; If the impeller diameter decreases, the flow rate and pressure decrease.

4. Change the number of impeller stages
-For multi-stage pumps, the number of impeller stages can be increased or decreased to regulate pressure and flow. As the number of stages increases, the pressure increases; The number of stages decreases, and the pressure decreases.

5. Adjust the clearance between the impeller and the pump casing
-Reasonably adjusting the gap between the impeller and the pump casing can to some extent affect the performance of the pump. But this method has a relatively small adjustment range and requires high accuracy.

6. Change pipeline characteristics
-For example, replacing pipes with different diameters, or adjusting the length of pipes, the number of bends, etc., in order to change the resistance characteristics of the entire pipeline system, indirectly affecting the pressure and flow rate of the pump.

In practical operation, appropriate adjustment methods should be selected based on specific working conditions and the type of sand pump, and attention should be paid to safety and stability during the adjustment process.

Detailed Photos

 

          A cutter suction dredger is a dredging tool that uses a rotating cutter to loosen the soil on the riverbed or seabed, mixes it with cement to form mud, and then sucks the mud into the pump body through a suction pipe and sends it to the discharge area. It is mainly used for dredging in inland lake areas and coastal ports, suitable for excavating soil such as sand, sandy loam, and silt. During the construction of the cutter suction dredger, the dredging, transportation, and unloading processes can be completed continuously in one go, resulting in high production efficiency.
The main structure of a cutter suction dredger includes the hull, cutter, suction pipe, pump body, and discharge pipe. The cutter is a key component of a cutter suction dredger, usually installed at the bow or side of the ship. By rotating the cutter, the sediment at the bottom of the water is crushed and mixed with water to form mud. The suction pipe is used to suck mud into the pump body, which transports the mud to the discharge area through the discharge pipe.

 The following aspects can help you determine whether the sand pump is operating normally:

1. Flow rate and pressure
-Compare the design flow rate and actual flow rate of the pump, as well as the design outlet pressure and actual outlet pressure. If the actual value is significantly lower than the design value, there may be a problem.
2. Sound
-During normal operation, the sound should be stable and uniform, without any abnormal noise, impact or friction sounds. If there is a sharp, dull, or irregular sound, it may indicate component damage or the presence of foreign objects.
3. Vibration
-Touch or use vibration measuring instruments to feel and measure the vibration of the pump body. Excessive vibration may indicate loose installation, loose or unbalanced components of the pump.
4. Temperature
-Check the temperature of the bearings, motors, and other parts of the pump. Excessive temperature may be a sign of poor lubrication, overload, or component wear.
5. Current
-Monitor the working current of the motor. A stable current within the normal range indicates normal operation. If the current fluctuates significantly or exceeds the rated value, there may be a fault.
6. Sealing performance
-Observe the sealing area for leaks. A small amount of leakage may be normal, but a large amount of leakage indicates damage to the sealing element.
7. Appearance
-Check if there are any abnormal deformations, cracks, or corrosion phenomena in the pump body, pipelines, etc.
8. Sand discharge situation
-Check whether the concentration and particle size of the discharged sand water mixture meet expectations. If there are significant changes, it may indicate that the pump is not working properly.
9. Instrument panel indication
-If the pump is equipped with a relevant instrument panel, pay attention to whether the parameter indications on the instrument panel are normal.

Based on the observation and testing from multiple aspects, it is possible to accurately determine whether the sand pump is operating normally. Once abnormalities are found, they should be stopped for inspection and maintenance in a timely manner to avoid causing more serious damage.
 

The construction process of a cutter suction dredger is generally as follows:
1. Construction preparation: including the formulation of construction plans, survey of construction areas, equipment inspection and commissioning, etc., then positioning the ship and accurately positioning the cutter suction dredger in the construction area. According to the wind and flow conditions, set up the windward and upstream anchors in order to stabilize the ship's hull.
2. Lowering the cutter bridge: Lower the cutter bridge to the designated cutter position for excavation.
3. Soil conveying: The soil crushed by the cutter is transported to the designated mud receiving area through a high-power centrifugal mud pump and a discharge pipeline.
4. Construction monitoring: Real time monitoring of excavation depth, instantaneous water level, cross-sectional view of excavation trench or underwater three-dimensional map and other data to ensure construction quality and safety.
5. Moving ship position: According to construction needs, move the ship to the next construction area by retracting and releasing anchor cables and adjusting the position of the winch.
The specific construction process may be adjusted appropriately based on engineering requirements, soil quality, hydrology, and other factors. topic

Product Parameters

Model	8inches	10 inches	12 inches	14 inches	16 inches	18 inches	20 inches
Hull length	8-12m	12-14m	14-16m	16-18m	18-20m	20-22m	22-24m
Excavation depth	6m-8m	8m-10m	10m-12m	12m-14m	14m-16m	16m-18m	18m-20m
Conveying distance	500m	800m	1000m	1500m	2000m	2500m	3000m
Equipped with power	55KW	132KW	180KW	220KW	260KW	300KW	350KW
Hourly production	200t	260t	300t	350t	400t	450t	500t

     Due to factors such as mining environment, materials, equipment, and demand, the above parameters are for reference only (not as the final standard values). For accurate equipment dimensions and parameters, please contact our professional designer!

Product Description

 

      Display of some parts of the dredger: scraper head, sand pump, gearbox, engine, conveying pipeline, float, etc. The parts equipped by our company are all high-quality products that meet national standards, and can also be equipped with designated brands according to customer requirements!

The following are the daily maintenance and precautions for dredgers:

Daily maintenance:
1. Regularly clean the hull, remove any attached debris, marine organisms, etc., and keep the surface of the hull clean.
2. Inspect and maintain various mechanical components, such as the cutter system, mud pump, engine, etc., to ensure their normal operation. Add lubricating oil and replace vulnerable parts as required.
3. Inspect and maintain the electrical system to ensure the safety and reliability of the circuit and the normal operation of electrical equipment.
4. Check and maintain the hydraulic system to ensure that there are no leaks in the hydraulic components, the hydraulic oil is clean and at the appropriate level.
5. Inspect and maintain the pipelines, valves, etc. of the dredger to prevent leakage and blockage.
6. Regularly inspect and calibrate various instruments and sensors to ensure accurate data.

Notes:
1. Strictly follow the operating procedures to avoid equipment damage or safety accidents caused by misoperation.
2. Pay close attention to the water depth and flow of the construction water area to ensure the safety of the dredging operation.
3. Pay attention to the operation status of the equipment, and if any abnormalities are found, stop the machine for inspection and handling in a timely manner.
4. Provide training and management for crew members, improve safety awareness and operational skills.
5. Ensure that safety equipment such as firefighting and lifesaving are complete and effective on board.
6. Reasonably arrange the operation time and intensity of the dredger to avoid excessive use.
7. Regularly conduct comprehensive inspections and maintenance on the dredger, and record the maintenance status.

                                  Shandong Haohang Intelligent Equipment Co., Ltd.
  was established in 2018, headquartered in Shandong Province, China. It is a professional manufacturer of dredgers. The company has years of industry experience and a professional technical team, committed to providing customers with high-quality dredger products and high-quality after-sales service.
The company's products cover various types and specifications of dredgers, including cutter suction dredgers, rake suction dredgers, chain bucket dredgers, etc. These dredgers are widely used in fields such as waterway dredging, port construction, hydraulic engineering, and marine engineering.
The company focuses on technological innovation and product research and development, continuously introducing advanced technology and equipment to improve product performance and quality. At the same time, the company also has a sound quality management system and after-sales service system to ensure that customers receive timely support and guarantee during use.
The company has customers all over the world and exports its products to multiple countries and regions. The company adheres to the business philosophy of "quality first, customer first", with the aim of integrity, innovation, and win-win, and has established long-term and stable cooperative relationships with customers.



When replacing the impeller of the sand pump, the following important issues need to be noted:

1. Model matching
-Ensure that the model and specifications of the new impeller match exactly with the original sand pump, including the diameter, number of blades, blade shape and angle, to ensure the performance and efficiency of the pump.

2. Material selection
-Select the appropriate impeller material based on the working environment of the sand pump and the characteristics of the conveying medium. For example, in corrosive media, corrosion-resistant materials should be selected.

3. Quality inspection
-Before installation, carefully inspect the new impeller for any defects, such as cracks, deformations, sand holes, etc., to ensure that the quality of the impeller is intact.

4. Installation accuracy
-When installing the impeller, it is necessary to ensure a tight fit between the impeller and the shaft and an accurate installation position to avoid eccentricity or loose installation.

5. Sealing treatment
-If there is a sealing device at the end of the impeller shaft, ensure that the seal is installed correctly to prevent leakage.

6. Tighten the bolts
-When tightening the bolts that fix the impeller, it is necessary to tighten them evenly according to the specified torque to prevent over tightening or over loosening.

7. Balance verification
-For high-speed rotating impellers, dynamic balance verification may be required to reduce vibration and noise, and extend the service life of the pump.

8. Trial operation
-After replacing the impeller, before officially putting it into use, conduct a trial run to observe the operation of the pump, including whether the flow rate, pressure, vibration, noise, etc. are normal.

9. Operating procedures
-Strictly follow the operating procedures and safety precautions provided by the manufacturer for replacing the impeller.

10. Cleaning work
-Before installation, ensure that the installation area is clean, free of debris and dirt, to avoid affecting installation accuracy and pump operation.
High efficiency and high quality cutter suction dredger [exported to Asia]