Sand bucket water pumping and sand discharging pipeline system and construction process thereof
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- CCCC GUANGZHOU DREDGING CO LTD
- Filing Date
- 2026-01-22
- Publication Date
- 2026-05-29
Smart Images
Figure CN121556405B_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of pipeline system technology, and in particular to a sand hopper pumping and sand discharge pipeline system and its construction process. Background Technology
[0002] Land reclamation, a crucial component of waterway dredging, water conservancy projects, and coastal infrastructure construction, is primarily accomplished using dredgers. Currently, trailing suction hopper dredgers and cutter suction dredgers are the mainstream equipment in the industry. However, traditional construction methods face significant challenges when dealing with specific projects. First, some construction areas have shallow water depths, making it difficult for deep-draft trailing suction hopper dredgers and cutter suction dredgers to operate, thus limiting their application scope. Second, even in areas where conditions permit, using large dredgers for single dredging operations results in high operating costs and poor economic efficiency.
[0003] To adapt to the diverse needs of engineering projects, modifying existing vessels has become a common practice in the industry. In recent years, influenced by environmental policies and resource extraction restrictions, a new land reclamation material supply model has gradually emerged, utilizing belt-driven vessels to transport overseas sand sources or manufactured sand to the project site, followed by pumping and dredging. This model requires receiving vessels to have efficient sand receiving and pumping capabilities. Traditional cutter suction dredger modifications typically involve removing the original cutter head and drive system, and adding a sand bucket device to the front of the bridge to achieve sand-water mixing and pumping functions.
[0004] However, existing retrofit solutions of this kind generally suffer from core technical problems such as limited functionality and insufficient adaptability to various working conditions. Most systems can only achieve fixed-mode pumping operations and cannot be flexibly adjusted according to changing discharge distances and output requirements during construction. In conditions requiring short discharge distances and high output, the system efficiency is low; while in conditions requiring long discharge distances, it may face insufficient power. This lack of flexibility leads to significant fluctuations in construction efficiency and makes it difficult to effectively control overall costs. Therefore, there is an urgent need to develop a water pumping and sand removal pipeline system and construction process that can integrate multiple working modes and intelligently switch according to actual working conditions, in order to overcome the bottlenecks of existing technologies and meet the urgent needs of modern, environmentally friendly, and efficient construction. Summary of the Invention
[0005] The purpose of this invention is to solve the problems existing in the prior art, and to propose a sand hopper pumping and sand discharge pipeline system and its construction process.
[0006] To achieve the above objectives, the present invention adopts the following technical solution:
[0007] A sand hopper pumping and sand discharge pipeline system includes a sand hopper body fixed to the ship's deck by a fixing rod, and further includes:
[0008] The pumping and sand discharge unit includes a first deck pump and a second deck pump installed on the ship's deck, used to discharge slurry made up of water and sand mixed in the mixing chamber of the sand bucket body. The first deck pump is connected to a first discharge pipe, and the second deck pump is connected to a second discharge pipe.
[0009] The pumping unit includes underwater pumps and submersible pumps installed inside the ship's bridge, used to draw seawater and pump it into the sand hopper body. Three submersible pumps are installed.
[0010] And a pumping and drainage pipeline assembly, which is installed between the ship's deck and the ship's bridge and connected to the sand hopper body, to realize multiple pumping and sand removal operation modes between the first deck pump, the second deck pump and the underwater pump.
[0011] Preferably, the bottom of the sand hopper body is provided with a first discharge port and a second discharge port, the sand hopper body is provided with a first straight cylinder at the first discharge port, and the sand hopper body is provided with a second straight cylinder at the second discharge port.
[0012] Preferably, the pumping pipeline assembly includes a first pipeline disposed between the underwater pump and the first straight cylinder, a second pipeline disposed between the submersible pump and the sand hopper body, a third pipeline disposed between the first straight cylinder and the first deck pump, a cross-connecting pipeline, and a fourth pipeline disposed between one of the interfaces of the second straight cylinder and the feed end of the underwater pump. The four openings of the cross-connecting pipeline are respectively connected to the discharge end of the first deck pump, the feed end of the second deck pump, the other interface of the second straight cylinder, and the feed end of the first discharge pipe.
[0013] The cross-shaped connecting pipeline is equipped with a first control valve in the middle. By switching the opening and closing state of the first control valve, the pipeline connection can be reconfigured to realize multiple pumping and sand removal operation modes between the first deck pump, the second deck pump, and the underwater pump. The multiple pumping and sand removal operation modes include the dual-pump parallel mode, the dual-pump series mode, and the three-pump series mode.
[0014] Preferably, the first pipeline is provided with a second control valve and a water inlet pipe leading to the mixing chamber of the sand hopper body before extending into the first straight cylinder. The second control valve is used to control the flow of water into the first straight cylinder.
[0015] The second pipeline has a drain outlet at the end of its extension into the mixing chamber of the sand hopper body. The water outlet's outlet direction forms an angle of 15° to 45° with the central axis of the sand hopper body, which is used to create a vortex in the injected water flow.
[0016] Preferably, an overflow pipe is provided on the upper side wall of the sand hopper body, and a remotely controllable drain valve is provided at one end of the overflow pipe located on the outside of the sand hopper body.
[0017] Preferably, it also includes a frequency conversion control system, which includes a frequency conversion cabinet located between the frequency converters and a control box located on the operator's console. The control box is connected to the frequency conversion cabinet via a communication line and is used to centrally control the synchronous start-up and shutdown and frequency adjustment of the three submersible pumps.
[0018] This invention also discloses a construction process for a sand hopper pumping and sand discharge pipeline system, comprising the following steps:
[0019] S1: Mode Selection and Piping Configuration: Based on the required spacing and output for construction, select one of the following modes: parallel dual-pump mode, series dual-pump mode, or series three-pump mode. By switching the opening and closing state of the first control valve in the pumping pipeline assembly, the corresponding mode's pipeline connection reconfiguration is completed.
[0020] S2: Pump start-up and water injection mixing: Start the underwater pump and / or submersible pump of the pumping unit to inject seawater into the mixing chamber of the sand bucket body, and mix it with the sand material transported to the bucket by the belt conveyor to form a uniform slurry.
[0021] S3: Pumping and sand removal operation: Start the first deck pump and the second deck pump of the pumping and sand removal unit to pump the mortar in the mixing chamber to the designated discharge area through the first discharge pipe and / or the second discharge pipe;
[0022] S4: Operation monitoring and safety control: During operation, the water level in the sand hopper body, the working pressure and flow of each pump body are monitored in real time, and the pump body operating conditions are adjusted through the frequency conversion control system, or the water level is adjusted by operating the drain valve on the overflow pipe to ensure the safe and stable operation of the system.
[0023] Preferably, in step S1, when the dual-pump parallel mode is selected, the piping configuration is as follows:
[0024] Open the first discharge port and the second discharge port, control the first control valve, so that the cross connecting pipe is connected to the second straight cylinder and the second deck pump inlet and the first deck pump outlet and the first discharge pipe respectively, while ensuring that the second control valve is in the closed state.
[0025] Water is injected into the sand bucket body by starting the underwater pump and submersible pump, and mixed with the sand to form mortar;
[0026] The first deck pump pumps mortar from the first discharge port through the first discharge pipe, and the second deck pump pumps mortar from the second discharge port through the second discharge pipe, so as to achieve simultaneous sand discharge from both pipes.
[0027] Preferably, in step S1, when the dual-pump series mode is selected, the piping configuration is as follows:
[0028] Open the first discharge port and close the second discharge port;
[0029] The underwater pump is started as the main water supply pump, and the submersible pump is the auxiliary water supply pump.
[0030] Control the first control valve so that the cross-connecting pipeline is connected only to the discharge end of the first deck pump and the inlet end of the second deck pump. The mortar is pressurized by the first deck pump, and the pressurized mortar is transported to the second deck pump for secondary pressurization through the cross-connecting pipeline, and finally pumped out by the high-pressure pump through the second discharge pipe.
[0031] Preferably, in step S1, when the three-pump series mode is selected, the piping configuration is as follows:
[0032] Open the second discharge port, close the first discharge port, and control the first control valve to maintain the pipeline connection in the dual-pump series mode, that is, the cross-connected pipeline is only connected to the discharge end of the first deck pump and the inlet end of the second deck pump.
[0033] The submersible pump is started to inject water into the sand hopper body and mix it with sand to form mortar. The mortar enters the fourth pipeline through the second discharge port and is transported to the underwater pump for primary pressurization. The pressurized mortar is then transported to the first deck pump and the second deck pump connected in series for secondary and tertiary pressurization, and finally pumped out by the high-pressure pump through the second discharge pipe.
[0034] Compared with the prior art, the present invention provides a sand hopper pumping and sand discharge pipeline system and its construction process, which has the following beneficial effects:
[0035] 1. In this invention, by operating the first control valve to change the internal passage of the cross-connecting pipeline, and in combination with the opening and closing of the second control valve, the connection relationship between the first deck pump, the second deck pump, and the underwater pump can be quickly reconfigured. The system can be configured as follows: a dual-pump parallel mode to achieve high output with short discharge distance; a dual-pump series mode to double the discharge distance; and a three-pump series mode to achieve ultra-long-distance delivery. The flexible modular pipeline design enables the ship to cope with a variety of complex construction needs, fundamentally solving the problems of single equipment function and poor adaptability to working conditions, and significantly improving the ship's adaptability to working conditions and construction efficiency.
[0036] 2. In this invention, a drain outlet with a specific angle is set at the end of the second pipeline extending into the mixing chamber of the sand hopper body. When the submersible pump is started, the high-pressure water flow is ejected obliquely from this drain outlet, naturally forming a strong vortex flow field in the hopper. This vortex allows the sand and water to be fully sheared and mixed, avoiding the rapid settling of sand particles and forming a uniform and stable high-concentration mortar. Compared with traditional static mixing or simple water injection, the active mixing technology has higher mixing efficiency and better effect, providing an ideal medium for subsequent pumping. It effectively prevents pipeline blockage caused by uneven mixing from the source and ensures the continuous and stable operation of the system.
[0037] 3. In this invention, by installing an overflow pipe and its drain valve on the upper side wall of the sand hopper body, when the water level exceeds the safety limit, the operator can remotely open the drain valve to release the water in time, fundamentally preventing the occurrence of overflow accidents. At the automatic control level, the frequency conversion control system can perform one-button synchronous start and stop and precise frequency adjustment of the three submersible pumps. This not only achieves stable control of the water injection flow rate and ensures the optimal liquid-solid ratio in the mixing chamber, but also greatly reduces the burden on the operator. It realizes the upgrade from passive response to active prediction and precise control, greatly improving the robustness and safety of the entire system in dealing with complex working conditions, and improving the reliability and automation level of system operation.
[0038] 4. In this invention, while retaining the original cutter suction dredging function, the standard cutter suction dredger is expanded into a composite engineering vessel with high-efficiency sand pumping function by adding a sand bucket body, submersible pump, and pumping pipeline components. This allows the vessel to flexibly switch between dredging and various sand pumping modes. The "one vessel, multiple uses" design concept greatly taps the potential of existing vessels, enabling them to seamlessly adapt to new processes such as belt conveyor sand supply to blowing, and provides an efficient and economical equipment solution for the upgrading and transformation of similar vessels and the implementation of new environmentally friendly construction projects. Attached Figure Description
[0039] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;
[0040] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;
[0041] Figure 3 This is a top view of the sand hopper pumping and sand discharge pipeline system described in this invention;
[0042] Figure 4 This is a side view of the sand hopper pumping and sand discharge pipeline system described in this invention.
[0043] Figure 5 This is a schematic diagram of the structure of the sand bucket body of the present invention. Figure 1 ;
[0044] Figure 6 This is a schematic diagram of the structure of the sand bucket body of the present invention. Figure 2 ;
[0045] Figure 7 This is a schematic diagram of the internal structure of the sand bucket body of the present invention;
[0046] Figure 8 for Figure 1 A schematic diagram of the structure after removing the sand hopper body;
[0047] Figure 9 This is a schematic diagram of the internal structure of the ship's bridge frame according to the present invention;
[0048] Figure 10 This is a schematic diagram of the external structure of the submersible pump and underwater pump of the present invention;
[0049] Figure 11 for Figure 10 Enlarged structural diagram of section A in the middle.
[0050] In the diagram: 1. Ship deck; 101. Fixing rod; 2. Sand hopper body; 201. First discharge port; 2011. First straight cylinder; 202. Second discharge port; 2021. Second straight cylinder; 3. First deck pump; 301. First discharge pipe; 4. Second deck pump; 401. Second discharge pipe; 5. Ship bridge; 501. Underwater pump; 502. Submersible pump; 6. Pumping and draining pipeline assembly; 601. First pipeline; 6011. Water inlet pipe; 602. Second pipeline; 6021. Drain outlet; 603. Third pipeline; 604. Cross-connecting pipeline; 605. Fourth pipeline; 7. First control valve; 8. Second control valve; 9. Overflow pipe; 901. Drain valve; 10. Variable frequency control system. Detailed Implementation
[0051] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.
[0052] In the description of this invention, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0053] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.
[0054] like Figures 1 to 4 As shown, this embodiment proposes a sand hopper pumping and sand discharge pipeline system, including a sand hopper body 2 fixed to the ship's deck 1 by a fixing rod 101, and further including:
[0055] The pumping and sand discharge unit includes a first deck pump 3 and a second deck pump 4 installed on the ship's deck 1. It is used to discharge slurry made of water and sand mixed in the mixing chamber of the sand bucket body 2. The first deck pump 3 is connected to a first discharge pipe 301, and the second deck pump 4 is connected to a second discharge pipe 401.
[0056] The pumping unit includes an underwater pump 501 and a submersible pump 502 installed inside the ship's bridge 5. These pumps are used to draw seawater and pump it into the sand hopper body 2. Three submersible pumps 502 are installed. It should be noted that the submersible pumps 502 can be installed vertically and hung on the ship's side by a crane instead of inside the ship's bridge 5 during operation to reduce the space occupied inside the ship. The sand hopper and the submersible pumps 502 are connected by a flexible hose. The number of submersible pumps 502 can be flexibly increased or decreased according to the actual water demand. To prevent the ship's bridge 5 from touching the ground and to enable the ship to operate in shallower waters, and to control the level of the bridge, water is drawn by installing a water pipe inserted into the water at the water inlet end of the underwater pumps 501 when the underwater pumps 501 are above the water surface.
[0057] And the pumping and drainage pipeline assembly 6, which is located between the ship deck 1 and the ship bridge 5 and connected to the sand bucket body 2, is used to realize multiple pumping and sand discharge operation modes between the first deck pump 3, the second deck pump 4 and the underwater pump 501.
[0058] Specifically, at the start of the operation, the pumping and dewatering unit is activated. Underwater pump 501 and submersible pump 502 draw seawater from outside the ship and pump it into the mixing chamber of the sand bucket body 2 through the pumping and discharge pipeline assembly 6. At the same time, an external sand supply system, such as a belt conveyor, transports sand to the sand bucket body 2. The water and sand are thoroughly mixed in the bucket to form a uniform slurry. After mixing, the pumping and discharge unit is activated. The first deck pump 3 and the second deck pump 4, according to the mode set by the pumping and discharge pipeline assembly 6, draw slurry from the bottom of the sand bucket body 2 through corresponding pipelines and pump it to the distant reclamation area under high pressure via the first discharge pipe 301 and / or the second discharge pipe 401. The key advantage of the system lies in the flexibility of its working mode. By reconfiguring the internal connection of the pumping and discharge pipeline assembly 6, multiple pumping and sand discharge operation modes between the first deck pump 3, the second deck pump 4, and the underwater pump 501 can be realized. For example, in parallel mode, the two pumps can work simultaneously to achieve maximum output; in series mode, the pumps relay pressurize to achieve longer-distance transportation.
[0059] By modularly integrating the three major functions of water pumping, mixing, and sand discharge into one unit, the pumping water pumping unit and the pumping sand discharge unit work together efficiently through the pumping and discharge pipeline component 6, realizing continuous and automated operation from water intake to sand discharge, which greatly improves the overall construction efficiency. By changing the pipeline connection, the system can switch between different working modes, easily cope with diverse construction requirements such as short discharge distance and high output, long discharge distance and high pressure, etc., making it a multi-purpose machine and significantly expanding the application scenarios of ships.
[0060] like Figure 5 , Figure 6 and Figure 7 As shown, in a preferred embodiment, based on the above method, the bottom of the sand hopper body 2 is further provided with a first discharge port 201 and a second discharge port 202, the sand hopper body 2 is provided with a first straight cylinder 2011 at the first discharge port 201, and the sand hopper body 2 is provided with a second straight cylinder 2021 at the second discharge port 202.
[0061] Specifically, to achieve smooth material discharge and guide the flow, a vertically downward cylindrical structure is fixedly connected to each discharge port. The first straight cylinder 2011 is connected to the first discharge port 201, and the second straight cylinder 2021 is connected to the second discharge port 202. These two straight cylinders constitute the main channel for the mortar to flow out of the mixing chamber, allowing the mortar to obtain smoother initial flow kinetic energy under the action of gravity, effectively preventing blockage or eddy currents that may occur near the discharge ports due to structural abrupt changes. Operators can flexibly choose to open one or both ports for operation according to production and discharge distance requirements. At the same time, this design also provides natural redundancy. If one discharge port or its downstream pipeline fails, the system can still maintain basic operation through the other discharge port, improving the reliability and availability of the equipment.
[0062] like Figures 1-11 As shown, in a preferred embodiment, based on the above method, the pumping pipeline assembly 6 further includes a first pipeline 601 disposed between the underwater pump 501 and the first straight cylinder 2011, a second pipeline 602 disposed between the submersible pump 502 and the sand hopper body 2, a third pipeline 603 disposed between the first straight cylinder 2011 and the first deck pump 3, a cross-connecting pipeline 604, and a fourth pipeline 605 disposed between one of the interfaces of the second straight cylinder 2021 and the feed end of the underwater pump 501. The four openings of the cross-connecting pipeline 604 are respectively connected to the discharge end of the first deck pump 3, the feed end of the second deck pump 4, the other interface of the second straight cylinder 2021, and the feed end of the first discharge pipe 301.
[0063] The cross-connecting pipe 604 is equipped with a first control valve 7 in the middle. By switching the opening and closing state of the first control valve 7 and changing its valve core position or opening and closing state, the direction of the medium flowing through the cross-connecting pipe 604 can be reconstructed, thereby determining the connection relationship between each pump body and the pipe, so as to realize multiple pumping and sand removal operation modes between the first deck pump 3, the second deck pump 4 and the underwater pump 501. Among them, the multiple pumping and sand removal operation modes include the dual pump parallel mode, the dual pump series mode and the three pump series mode.
[0064] Specifically, in the dual-pump parallel mode: the first control valve 7 is operated to connect its internal passage to the inlet end of the second straight cylinder 2021 and the second deck pump 4, and simultaneously connects the outlet end of the first deck pump 3 to the first discharge pipe 301. At this time, mortar can enter the first deck pump 3 and the second deck pump 4 respectively through the third pipe 603 and the cross-connecting pipe 604. The two pumps work independently, pumping the mortar out in parallel through their respective discharge pipes, achieving high-volume delivery. In the dual-pump series mode: the first control valve 7 is operated to connect its internal passage to the outlet end of the first deck pump 3 and the inlet end of the second deck pump 4, while blocking the passage to the second straight cylinder 2021 and the first discharge pipe 301. At this time, the mortar from the first straight cylinder 2011 via the third pipe 603 is first pressurized by the first deck pump 3, then enters the second deck pump 4 through the cross-connecting pipe 604 for secondary pressurization, and finally is pumped out under high pressure through the second discharge pipe 401, achieving long-distance delivery. In the three-pump series mode... Maintaining the first control valve 7 in the dual-pump series mode, i.e., connecting the first deck pump 3 and the second deck pump 4, allows mortar to flow out from the second straight cylinder 2021, enter the underwater pump 501 through the fourth pipeline 605 for primary pressurization, and then be transported through the first pipeline 601 to the connected first deck pump 3 and second deck pump 4 for secondary and tertiary pressurization, ultimately achieving ultra-long-distance discharge. This makes switching between the three working modes quick and reliable, greatly improving the system's operating efficiency and adaptability. Depending on actual usage requirements, the first straight cylinder 2011 and the second straight cylinder 2021 can also be integrated into a large-diameter straight cylinder. According to the needs of dual-pump parallel, dual-pump series, and three-pump series modes, pipelines and valves are used inside the straight cylinder to connect the first pipeline 601, the third pipeline 603, the cross-connecting pipeline 604, and the fourth pipeline 605 respectively, to increase the volume of the sand hopper, enhance the strength of the sand hopper, and improve the flexibility of system connection.
[0065] It should be noted that, during pumping operations, the ship's bridge 5 needs to rotate downwards with its hinge point to the ship's deck 1 as the center, thereby driving the submersible pump 502 and underwater pump 501 to be underwater or on the surface for easy pumping. Therefore, in the critical sections of the first pipeline 601, the second pipeline 602, and the fourth pipeline 605 that need to adapt to bending and displacement, specially made high-pressure rubber hoses or composite hoses for marine engineering will be used. This hose acts as a "bridge". When the ship's bridge 5 is lowered or raised, it can easily adapt to large changes in the hinge point angle through its own bending and stretching.
[0066] like Figure 5 , Figure 7 , Figure 10 and Figure 11 As shown, in a preferred embodiment, based on the above method, the first pipeline 601 is further provided with a second control valve 8 and a water inlet pipe 6011 leading to the mixing chamber of the sand hopper body 2 before extending into the first straight cylinder 2011. The second control valve 8 is used to control the flow of water into the first straight cylinder 2011.
[0067] The end of the second pipe 602 that extends into the mixing chamber of the sand hopper body 2 is provided with a drain outlet 6021. The water outlet 6021 has an angle of 15° to 45° with the central axis of the sand hopper body 2, which is used to make the injected water flow form a vortex.
[0068] Specifically, the water flow path control of the first pipeline 601: When the second control valve 8 is open, the water flow from the submersible pump 501 in the first pipeline 601 will mainly flow to and enter the first straight cylinder 2011, which is suitable for the three-pump series mode. When the second control valve 8 is closed, the water flow is blocked and cannot flow to the first straight cylinder 2011, which is suitable for the two-pump series or two-pump parallel mode. At this time, the water flow is directly injected into the mixing chamber of the sand bucket body 2 through the bypass of the inlet pipe 6011; the swirling water injection of the second pipeline 602: The second pipeline 602 continuously pumps the seawater delivered by the submersible pump 502 into the sand bucket mixing chamber, and the water flow from the pipeline The water jets out from the end drain outlet 6021. Because the orientation of the drain outlet 6021 is at an angle of 15° to 45° with the central axis of the sand hopper, the jetting water is no longer parallel to the axis, but has a tangential component. This oblique water flow impacts the water in the hopper, naturally forming a continuous vortex flow field. This vortex field generates strong shearing and entrainment effects on the sand and water, overcoming the mixing dead zone problem that is easily caused by static mixing or vertical water injection. This allows the sand and water to reach a highly uniform mixing state in a short time, laying a solid foundation for subsequent efficient and stable pumping operations, and effectively preventing the risk of pipeline blockage caused by uneven mixing.
[0069] like Figure 1As shown, in a preferred embodiment, based on the above method, an overflow pipe 9 is further provided on the upper side wall of the sand bucket body 2. The overflow pipe 9 is provided with a remotely controllable drain valve 901 at one end located outside the sand bucket body 2. At the same time, a quick connector can be provided at the end of the sand bucket overflow pipe 9 as needed, which can be connected to the mud pump of another dredger moored next to it to become a third discharge pipe, so as to further increase the sand blowing volume.
[0070] Specifically, during system operation, operators continuously monitor the liquid level in the mixing chamber of the sand hopper body 2. When the water level in the hopper is detected to rise continuously due to fluctuations in the feed rate, changes in the pumping rate, or other unexpected situations, and reaches or exceeds the preset safety threshold, it is determined that there is an overflow risk. At this time, the operator triggers a command through a remote control signal to open the drain valve 901 located at the outer end of the overflow pipe 9. After the drain valve 901 is opened, the excess water in the upper layer inside the sand hopper is immediately discharged through the overflow pipe 9 to the ship deck or the designated discharge area under static pressure. This process continues until the water level in the hopper drops below the safety threshold, the overflow risk is eliminated, and then the drain valve 901 can be remotely closed, and the system resumes normal operation.
[0071] like Figure 1 , Figure 8 , Figure 9 and Figure 10 As shown, as a preferred embodiment, based on the above method, it further includes a frequency conversion control system 10. The frequency conversion control system 10 includes a frequency conversion cabinet installed between the frequency converters and a control box installed on the operator's cab. The control box is connected to the frequency conversion cabinet through a communication line and is used to centrally control the synchronous start and stop and frequency adjustment of the three submersible pumps 502.
[0072] Specifically, the operator at the control console selects the operating mode and sets the target frequency (i.e., target flow rate) on the control box according to construction requirements. The control box sends instructions (such as start commands and frequency setpoints) to the frequency converter cabinets in the inverter room via communication lines. The frequency converters in the cabinets receive and process these digital signals. Based on the received instructions, the frequency converters output three-phase AC power of the corresponding frequency and voltage, driving the corresponding submersible pump 502 motor to start and run smoothly at the set speed. The real-time data such as the operating status (run / stop, current, frequency) and fault information of the three submersible pumps 502 are fed back to the control box at the control console via the same communication line and displayed on the touch screen or indicator lights for the operator to monitor, enabling the system to function properly. The water injection flow rate can be precisely and linearly adjusted according to the changes in sand supply rate and required mortar concentration, avoiding the "oversized motor for a small load" phenomenon under traditional power frequency start-stop control. This ensures that the pump always operates in the high-efficiency range, significantly reducing power consumption and achieving energy-saving operation. Due to the high technical difficulty and cost of retrofitting the original large high-pressure underwater pump system with frequency conversion, involving the re-laying of large-section cables, the installation of high-voltage frequency converters, and the deep integration and testing of the original control system, the complexity, construction period, and risk of the project will be significantly increased. As the original core equipment of the cutter suction dredger, the underwater pump 501 is equipped with a mature and independent electric drive and control system, which can be controlled through the original control system.
[0073] This invention also discloses a construction process for a sand hopper pumping and sand discharge pipeline system, comprising the following steps:
[0074] S1: Mode selection and pipeline configuration: Based on the required spacing and output of the pumps, select one of the following modes: parallel dual-pump mode, series dual-pump mode, or series triple-pump mode. Then, by switching the opening and closing state of the first control valve 7 in the pumping pipeline assembly 6, the pipeline connection reconstruction of the corresponding mode can be completed.
[0075] S2: Pump start-up and water injection mixing: Start the underwater pump 501 and / or submersible pump 502 of the pumping unit to inject seawater into the mixing chamber of the sand bucket body 2, and mix it with the sand material transported to the bucket by the belt conveyor to form a uniform slurry.
[0076] S3: Pumping and sand discharge operation: Start the first deck pump 3 and the second deck pump 4 of the pumping and sand discharge unit to pump the mortar in the mixing chamber to the designated discharge area through the first discharge pipe 301 and / or the second discharge pipe 401.
[0077] S4: Operation monitoring and safety control: During operation, the water level in the sand hopper body 2, the working pressure and flow of each pump body are monitored in real time, and the pump body operating conditions are adjusted through the frequency conversion control system 10, or the water level is adjusted by operating the drain valve 901 on the overflow pipe 9 to ensure the safe and stable operation of the system.
[0078] In step S1, when the dual-pump parallel mode is selected, the specific piping configuration is as follows:
[0079] Open the first discharge port 201 and the second discharge port 202, control the first control valve 7, so that the cross connecting pipe 604 connects the second straight cylinder 2021 to the inlet of the second deck pump 4 and the outlet of the first deck pump 3 to the first discharge pipe 301 respectively. At the same time, ensure that the second control valve 8 is in the closed state.
[0080] Water is injected into the sand bucket body 2 by starting the underwater pump 501 and the submersible pump 502, and mixed with the sand to form mortar.
[0081] The first deck pump 3 pumps mortar from the first discharge port 201 through the first discharge pipe 301, and the second deck pump 4 pumps mortar from the second discharge port 202 through the second discharge pipe 401, achieving simultaneous mortar discharge from both pipes. In step S1, when the dual-pump series mode is selected, the specific pipeline configuration is as follows:
[0082] Open the first discharge port 201 and close the second discharge port 202;
[0083] Start the underwater pump 501 as the main water supply pump body, and the submersible pump 502 as the auxiliary water supply pump body;
[0084] Control the first control valve 7 so that the cross-connecting pipe 604 is connected only to the discharge end of the first deck pump 3 and the inlet end of the second deck pump 4. The mortar is pressurized by the first deck pump 3, and the pressurized mortar is transported to the second deck pump 4 for secondary pressurization through the cross-connecting pipe 604. Finally, it is pumped out by the second discharge pipe 401 under high pressure.
[0085] In step S1, when the three-pump series mode is selected, the specific piping configuration is as follows:
[0086] Open the second discharge port 202, close the first discharge port 201, and control the first control valve 7 to maintain the pipeline connection in the dual-pump series mode, that is, the cross-connected pipeline 604 is only connected to the discharge end of the first deck pump 3 and the inlet end of the second deck pump 4.
[0087] The submersible pump 502 is started to inject water into the sand hopper body 2 and mix it with sand to form mortar. The mortar enters the fourth pipeline 605 through the second discharge port 202 and is transported to the underwater pump 501 for primary pressurization. The pressurized mortar is then transported to the first deck pump 3 and the second deck pump 4 connected in series for secondary and tertiary pressurization, and finally pumped out under high pressure through the second discharge pipe 401.
[0088] The accompanying drawings in this application are for illustrative purposes only. The dimensions and shapes of the components shown are not actual limitations but are merely schematic representations. In actual implementation, the components can be reasonably configured and adjusted according to specific needs and actual conditions.
[0089] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.
Claims
1. A sand hopper pumping and sand discharge pipeline system, comprising a sand hopper body (2) fixed to the ship's deck (1) by a fixing rod (101), characterized in that, Also includes: The pumping and sand discharge section includes a first deck pump (3) and a second deck pump (4) installed on the ship deck (1) for discharging slurry made of water and sand mixed in the mixing chamber of the sand bucket body (2). The first deck pump (3) is connected to a first discharge pipe (301), and the second deck pump (4) is connected to a second discharge pipe (401). The pumping pumping unit includes an underwater pump (501) and a submersible pump (502) installed inside the ship bridge (5) for drawing seawater and pumping it into the sand bucket body (2). Three submersible pumps (502) are provided. And the pumping and drainage pipeline assembly (6), which is located between the ship deck (1) and the ship bridge (5) and connected to the sand bucket body (2), is used to realize multiple pumping and sand discharge operation modes between the first deck pump (3), the second deck pump (4) and the underwater pump (501). The bottom of the sand hopper body (2) is provided with a first discharge port (201) and a second discharge port (202). The sand hopper body (2) is provided with a first straight cylinder (2011) at the first discharge port (201) and a second straight cylinder (2021) at the second discharge port (202). The pumping pipeline assembly (6) includes a first pipeline (601) between the underwater pump (501) and the first straight cylinder (2011), a second pipeline (602) between the submersible pump (502) and the sand hopper body (2), a third pipeline (603) between the first straight cylinder (2011) and the first deck pump (3), a cross-connecting pipeline (604), and a fourth pipeline (605) between one of the interfaces of the second straight cylinder (2021) and the feed end of the underwater pump (501). The four openings of the cross-connecting pipeline (604) are respectively connected to the discharge end of the first deck pump (3), the feed end of the second deck pump (4), the other interface of the second straight cylinder (2021), and the feed end of the first discharge pipe (301). The cross-shaped connecting pipe (604) is provided with a first control valve (7) in the middle. By switching the opening and closing state of the first control valve (7), the pipe connection can be reconstructed to realize multiple pumping and sand removal operation modes between the first deck pump (3), the second deck pump (4) and the underwater pump (501). The multiple pumping and sand removal operation modes include the dual-pump parallel mode, the dual-pump series mode and the three-pump series mode.
2. The sand hopper pumping and sand discharge pipeline system according to claim 1, characterized in that, Before the first pipeline (601) extends into the first straight cylinder (2011), it is provided with a second control valve (8) and a water inlet pipe (6011) leading to the mixing chamber of the sand hopper body (2). The second control valve (8) is used to control the flow of water into the first straight cylinder (2011). The second pipeline (602) extends into the mixing chamber of the sand hopper body (2) and is provided with a drain outlet (6021). The water outlet (6021) is at an angle of 15° to 45° with the central axis of the sand hopper body (2) to make the injected water flow form a vortex.
3. The sand hopper pumping and sand discharge pipeline system according to claim 2, characterized in that, An overflow pipe (9) is provided on the upper side wall of the sand hopper body (2), and a drain valve (901) that can be remotely controlled is provided at one end of the overflow pipe (9) located outside the sand hopper body (2).
4. A sand hopper pumping and sand discharge pipeline system according to claim 3, characterized in that, It also includes a frequency conversion control system (10), which includes a frequency conversion cabinet located between the frequency converters and a control box located on the operator's cab. The control box is connected to the frequency conversion cabinet via a communication line and is used to centrally control the synchronous start-up and shutdown and frequency adjustment of the three submersible pumps (502).
5. A construction process for a sand hopper pumping and sand discharge pipeline system according to claim 4, characterized in that, Includes the following steps: S1: Mode selection and pipeline configuration: According to the required row spacing and output requirements for construction, select one of the following modes: parallel mode of two pumps, series mode of two pumps or series mode of three pumps, and complete the pipeline connection reconstruction of the corresponding mode by switching the opening and closing state of the first control valve (7) in the pumping pipeline assembly (6). S2: Pump start-up and water injection mixing: Start the underwater pump (501) and / or submersible pump (502) of the pumping unit to inject seawater into the mixing chamber of the sand bucket body (2) and mix it with the sand material transported to the bucket by the belt conveyor to form a uniform slurry. S3: Pumping and sand removal operation: Start the first deck pump (3) and the second deck pump (4) of the pumping and sand removal unit to pump the mortar in the mixing chamber to the designated discharge area through the first discharge pipe (301) and / or the second discharge pipe (401); S4: Operation monitoring and safety control: During operation, the water level in the sand bucket body (2), the working pressure and flow of each pump body are monitored in real time, and the pump body working conditions are adjusted through the frequency conversion control system (10), or the water level is adjusted by operating the drain valve (901) on the overflow pipe (9) to ensure the safe and stable operation of the system.
6. The construction process of a sand hopper pumping and sand discharge pipeline system according to claim 5, characterized in that, In step S1, when the dual-pump parallel mode is selected, the piping configuration is as follows: Open the first discharge port (201) and the second discharge port (202), control the first control valve (7), so that the cross-connecting pipe (604) is connected to the second straight cylinder (2021) and the inlet of the second deck pump (4) and the outlet of the first deck pump (3) and the first discharge pipe (301), respectively. At the same time, ensure that the second control valve (8) is in the closed state. Water is injected into the sand bucket body (2) by starting the underwater pump (501) and the submersible pump (502) to mix with the sand and form mortar; The first deck pump (3) pumps mortar from the first discharge port (201) through the first discharge pipe (301), and the second deck pump (4) pumps mortar from the second discharge port (202) through the second discharge pipe (401), so as to achieve simultaneous discharge of sand from both pipes.
7. The construction process of a sand hopper pumping and sand discharge pipeline system according to claim 6, characterized in that, In step S1, when the dual-pump series mode is selected, the piping configuration is as follows: Open the first discharge port (201) and close the second discharge port (202); The underwater pump (501) is started as the main water supply pump body, and the submersible pump (502) is the auxiliary water supply pump body; Control the first control valve (7) so that the cross-connecting pipe (604) is connected only to the discharge end of the first deck pump (3) and the inlet end of the second deck pump (4). The mortar is pressurized by the first deck pump (3) and then transported to the second deck pump (4) for secondary pressurization through the cross-connecting pipe (604). Finally, it is pumped out by the second discharge pipe (401) under high pressure.
8. The construction process of a sand hopper pumping and sand discharge pipeline system according to claim 7, characterized in that, In step S1, when the three-pump series mode is selected, the piping configuration is as follows: Open the second discharge port (202), close the first discharge port (201), and control the first control valve (7) to maintain the pipeline connection in the dual-pump series mode, that is, the cross-connected pipeline (604) is only connected to the discharge end of the first deck pump (3) and the feed end of the second deck pump (4); The submersible pump (502) is started to inject water into the sand hopper body (2) and mix it with sand to form mortar. The mortar enters the fourth pipeline (605) through the second discharge port (202) and is transported to the underwater pump (501) for primary pressurization. The pressurized mortar is then transported to the first deck pump (3) and the second deck pump (4) connected in series for secondary and tertiary pressurization, and finally pumped out by the second discharge pipe (401) under high pressure.