A method, device, equipment, and medium for determining the installation location of an underwater pump on a trailing suction hopper dredger.

Abstract

This invention discloses a method, apparatus, equipment, and medium for determining the installation position of an underwater pump on a trailing suction hopper dredger. Based on the target loading time and preset required head of the dredger's hopper, a target underwater mud pump is selected from multiple underwater mud pumps, and its external characteristic curve is determined. Multiple hopper loading conditions are determined based on dredging depth requirements and mud characteristics, along with the hopper conveying system and loading constraints for each condition. The hopper conveying system indicates the initial installation position of the target underwater mud pump. Based on the hopper conveying system and external characteristic curve for each hopper loading condition, pipelines are matched to the mud pump's operating point. The target hopper loading condition point is determined by combining the hopper constraints for each condition. An initial cavitation safety margin is determined based on the hopper conveying system and external characteristic curve corresponding to the target hopper loading condition point. The initial installation position indicated by the corresponding cavitation safety margin threshold is adjusted to obtain the target installation position. This method ensures the optimal performance of the underwater pump within the trailing suction hopper dredger.

Description

Technical Field

[0001] The embodiments of the present invention relate to the field of dredging technology, and in particular to a method, device, equipment and medium for determining the installation position of an underwater pump on a trailing suction hopper dredger. Background Technology

[0002] With the continuous development of dredging technology, trailing suction hopper dredgers are developing towards larger hopper capacity and greater dredging depth. In order to ensure the dredging efficiency of large trailing suction hopper dredgers at great dredging depths, underwater pumps, also known as underwater mud pumps, can be installed on the trailing suction hopper dredgers.

[0003] The underwater mud pump is mounted on the rake arm system of the trailing suction hopper dredger. From the perspective of dredging performance, the closer the installation position is to the rake head, the less likely the mud pump is to cavitation. However, this places higher demands on the pressure resistance and sealing performance of the underwater motor, and also increases the burden on the hoisting system, which in turn leads to a series of problems such as winch upgrades, increased wire rope weight, and increased size and weight of the rake arm crane. Therefore, it is necessary to determine a reasonable installation position for the underwater mud pump on the rake arm system.

[0004] However, most existing trailing suction hopper dredgers are not equipped with underwater mud pumps, and for the remaining trailing suction hopper dredgers that are equipped with underwater mud pumps, there is a lack of specific methods for determining the installation position of the underwater mud pump on the drag arm system. Therefore, there is an urgent need for a method to determine the installation position of the underwater mud pump on the drag arm system. Summary of the Invention

[0005] This invention provides a method, device, equipment, and medium for determining the installation location of an underwater pump on a trailing suction hopper dredger, which can ensure the performance of the target underwater mud pump in the trailing suction hopper dredger.

[0006] In a first aspect, embodiments of the present invention provide a method for determining the installation location of an underwater pump on a trailing suction hopper dredger, including:

[0007] Based on the target loading time and preset required head of the trailing suction hopper dredger, a target underwater mud pump is selected from multiple underwater mud pumps, and the external characteristic curve of the target underwater mud pump is determined.

[0008] Based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, multiple loading conditions are determined, along with the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump.

[0009] Based on the loading and conveying system and the external characteristic curves of each loading condition, the pipeline and mud pump operating points are matched, and the target loading condition point is determined by combining the loading constraints of each loading condition.

[0010] Based on the loading and conveying system corresponding to the target loading point and the external characteristic curve, the initial cavitation safety margin is determined. The initial installation position indicated by the corresponding loading and conveying system is adjusted in combination with the cavitation safety margin threshold to obtain the target installation position.

[0011] Secondly, embodiments of the present invention provide a device for determining the installation position of an underwater pump on a trailing suction hopper dredger, comprising:

[0012] The first processing module is used to select a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and to determine the external characteristic curve of the target underwater mud pump.

[0013] The second processing module is used to determine multiple loading conditions based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump.

[0014] The third processing module is used to match the pipeline and mud pump operating points based on the loading and conveying system and the external characteristic curve of each loading condition, and to determine the target loading condition point in combination with the loading constraints of each loading condition.

[0015] The fourth processing module is used to determine the initial cavitation safety margin based on the loading and conveying system corresponding to the target loading and conveying point and the external characteristic curve, and to adjust the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain the target installation position.

[0016] Thirdly, embodiments of the present invention provide an electronic device, including:

[0017] At least one processor; and

[0018] A memory communicatively connected to the at least one processor; wherein,

[0019] The memory stores a computer program that can be executed by the at least one processor to enable the at least one processor to perform the method as described in the first aspect.

[0020] Fourthly, embodiments of the present invention provide a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the method described in the first aspect.

[0021] The technical solution of this invention involves selecting a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and determining the external characteristic curve of the target underwater mud pump; determining multiple loading conditions based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading constraints for each loading condition, with the loading and conveying system indicating the initial installation position of the target underwater mud pump; matching the pipeline with the mud pump operating point based on the loading and conveying system and external characteristic curve for each loading condition, and determining the target loading condition point by combining the loading constraints for each loading condition; determining the initial cavitation safety margin based on the loading and conveying system and external characteristic curve corresponding to the target loading condition point, and adjusting the initial installation position indicated by the corresponding loading and conveying system based on the cavitation safety margin threshold to obtain the target installation position. This solution determines the appropriate target underwater mud pump for the trailing suction hopper dredger by considering its target hopper capacity, loading time, and preset required head. It also automatically determines the appropriate target installation position for the target underwater mud pump based on the dredger's loading conditions, loading and conveying system, loading constraints, and the characteristics of the target underwater mud pump, thus ensuring the performance of the target underwater mud pump within the trailing suction hopper dredger.

[0022] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a flowchart of a method for determining the installation position of an underwater pump on a trailing suction hopper vessel according to Embodiment 1 of the present invention;

[0025] Figure 2 This is a schematic diagram of a loading and conveying system according to Embodiment 1 of the present invention;

[0026] Figure 3 This is a schematic diagram of a mud pump selection chart provided in Embodiment 1 of the present invention;

[0027] Figure 4 This is a flowchart of a method for determining the installation position of an underwater pump on a trailing suction hopper vessel according to Embodiment 2 of the present invention;

[0028] Figure 5This is a schematic diagram of the structure of a device for determining the installation position of an underwater pump on a trailing suction hopper vessel according to Embodiment 3 of the present invention;

[0029] Figure 6 This is a schematic diagram of the structure of an electronic device that implements an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., used in this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Example 1

[0033] Figure 1 This is a flowchart illustrating a method for determining the installation position of an underwater pump on a trailing suction hopper dredger according to Embodiment 1 of the present invention. This embodiment is applicable to determining the installation position of an underwater mud pump on the boom of a trailing suction hopper dredger. This method can be executed by a device for determining the installation position of the underwater pump on the trailing suction hopper dredger. This device can be implemented in software and / or hardware and integrated into an electronic device. Furthermore, the electronic device includes, but is not limited to, computers, laptops, servers, etc.

[0034] like Figure 1 As shown, the method includes:

[0035] S110. Based on the target loading time and preset required head of the trailing suction hopper dredger, select a target underwater mud pump from multiple underwater mud pumps and determine the external characteristic curve of the target underwater mud pump.

[0036] The target loading time for a trailing suction hopper dredger can be understood as the time required for the dredger to fill its hopper with mud; this can be a parameter set at the factory. The preset required head for a trailing suction hopper dredger can be understood as the height of water required to be lifted by the underwater mud pumps mounted on the dredger, which draws in mud and delivers it to the hopper. This can be determined based on the actual operating scenario and is not limited here.

[0037] In this step, the expected loading velocity of the trailing suction hopper dredger can be determined based on the target loading time of the hopper capacity. From multiple underwater mud pumps, an underwater mud pump that can meet the expected loading velocity and the preset required head, and whose efficiency exceeds a set efficiency threshold, is selected as the target underwater mud pump adapted to the trailing suction hopper dredger. The expected loading velocity can be the expected velocity at which mud is transported into the mud hopper. The set efficiency threshold is not limited.

[0038] Optionally, when selecting a target underwater mud pump, in addition to the target loading time and preset required head, the size of the underwater mud pump can also be considered. For example, a low-pressure pump with 3 blades can be selected as the target underwater mud pump. This type of mud pump is small in size, light in weight, and has a strong throughput capacity.

[0039] Once the target underwater dredger is determined, its corresponding external characteristic curves can be determined based on the factory settings of the target underwater dredger. These external characteristic curves can describe the relationship between the main performance parameters of the target underwater dredger. The external characteristic curves mainly involved in this invention can include the water flow rate-head curve (indicating the relationship between water flow rate and head), the water flow rate-power curve (indicating the relationship between water flow rate and power), and the water flow rate-NPSH curve (indicating the relationship between water flow rate and NPSH).

[0040] S120. Based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, determine multiple loading conditions, as well as the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump.

[0041] A mud loading and conveying system can be a system that transports mud from the work area to the mud bin. Figure 2 This is a schematic diagram of a loading and conveying system according to Embodiment 1 of the present invention. In dredging operations, along the direction of mud flow, the loading and conveying system may include at least a rake head, a pre-pump rake pipe, a target underwater mud pump, a post-pump rake pipe, and an inlet pipe. The rake head is located in… Figure 2 Not shown in the diagram, it can be installed at the end of the rake pipe in front of the pump that is furthest from the target underwater mud pump; the rake pipe in front of the pump corresponds to... Figure 2 Medium length L1 rake pipe; the rake pipe after the pump corresponds to Figure 2 The rake pipe of medium length L2; the inlet pipe corresponds to Figure 2The pipe of medium length L3; the sum of the lengths L1 (before the pump) and L2 (after the pump) of the rake pipe, L can be understood as the total length of the rake pipe. Figure 2 The diagram also shows the dredging depth Y and the angle of the trailing suction hopper relative to the ground of the dredger. .

[0042] In this step, multiple dredging depth ranges can be divided according to the dredging depth requirements of the trailing suction hopper dredger. Based on the combination of each dredging depth range and the corresponding mud characteristics under each dredging depth range, multiple loading conditions can be determined.

[0043] Under each loading condition, determine the loading and conveying system for that condition, i.e., determine... Figure 2 The values ​​of each parameter determine the positions of the various components included in the loading and conveying system. Specifically, the dredging depth Y can be determined by the dredging depth under the loading condition; the total length L of the rake pipe, the length L1 of the rake pipe before the pump, and the length L2 of the rake pipe after the pump can be determined by the dredging depth under the loading condition combined with preset values. That is, a larger dredging depth corresponds to a larger total length L of the rake pipe. L1 and L2 reflect the initial installation position of the target underwater mud pump on the rake arm. The initial installation position can be understood as the preset position relative to the rake pipe before and after the pump when installing the target underwater mud pump on the rake arm with a certain total length of rake pipe, which needs further optimization later; the length L3 of the inlet pipe can be set according to the structure of the trailing suction hopper dredger, and L3 can be consistent under different loading conditions; the rake pipe's ground angle... It can be set by combining the dredging depth Y and the total length of the rake pipe L. It should be noted that different loading conditions involve changes in the pipe length but not in the pipe inner diameter.

[0044] Under each loading condition, determine the loading constraints for that condition. Since the main loading constraints for the target underwater mud pump include the mud flow velocity in the pipe and the underwater motor power, the loading constraints may include power constraints for the underwater motor power and flow constraints for the mud flow velocity in the pipe, which are not specified here.

[0045] S130. Based on the loading and conveying system and the external characteristic curve of each loading condition, the pipeline and mud pump operating points are matched, and the target loading condition point is determined in combination with the loading constraints of each loading condition.

[0046] In this step, for each loading condition, the following operations can be performed: Based on the loading and conveying system for that condition, determine the relationship between the head (i.e., resistance loss) and flow rate required for the mud to flow in the pipeline of the loading and conveying system; determine the relationship between the head and flow rate provided by the target underwater mud pump during operation based on the external characteristic curve; perform operating point matching based on the above two relationships, i.e., determine the operating point where the head and flow rate of the pipeline and mud pump are consistent; among the matched operating points, find the operating point that simultaneously satisfies the power limitation and flow rate limitation conditions included in the loading constraints, and determine it as the target loading operating point for that loading condition. The target loading operating point can be an operating point that satisfies the loading constraints based on the matching of the pipeline and mud pump operating points.

[0047] S140. Based on the loading and conveying system corresponding to the target loading and conveying point and the external characteristic curve, determine the initial cavitation safety margin, and adjust the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain the target installation position.

[0048] For each loading condition, the total length L of the rake pipe remains unchanged. Without considering any limiting conditions, the adjustment of the installation position of the target underwater mud pump, i.e., the adjustment of L1 and L2, does not affect the matching calculation results of the working point. The flow velocity and the net positive suction head (NPSH) of the target underwater mud pump remain unchanged. Only the NPSH of the target underwater mud pump is affected.

[0049] The cavitation safety margin is related to the net positive suction head (NPSH) of the equipment and the cavitation pump NPSH. Therefore, adjusting the installation position of the target underwater cavitation pump will affect the cavitation safety margin. The minimum equipment NPSH that meets the cavitation safety margin threshold is the required equipment NPSH, and the corresponding installation position of the target underwater cavitation pump is the necessary installation position of the target underwater cavitation pump, that is, the installation position that can meet the dredging operation requirements of the target underwater cavitation pump under the loading condition. It can be understood as a candidate installation position determined based on the loading condition. In this invention, the candidate installation position can be the installation position represented by the length L2 of the rake pipe after the pump, given that the total length L of the rake pipe of the loading and conveying system corresponding to the loading condition is constant.

[0050] In this context, the net positive suction head (NPSH) of a mud pump can be understood as the minimum pressure margin that the mud pump itself must have on the suction side to avoid cavitation. The system NPSH can be understood as the actual pressure margin provided by the pipeline to the mud pump inlet. The cavitation safety margin can be understood as the difference between the system NPSH and the mud pump NPSH to ensure that the mud pump does not experience cavitation. The cavitation safety margin threshold can be understood as the minimum cavitation safety margin to ensure that the mud pump does not experience cavitation.

[0051] By understanding the relationship between cavitation safety margin, system cavitation margin, and mud pump cavitation margin, and the change in system cavitation margin before and after the target subsea mud pump is adjusted in its installation position, combined with theoretical derivation, it can be concluded that under each loading condition, as long as the initial cavitation safety margin of the target subsea mud pump in the loading and conveying system corresponding to that loading condition is determined, the candidate installation position to which the target subsea mud pump should be adjusted can be determined.

[0052] Specifically, under each loading condition, the net positive suction head (NPSH) of the device can be determined based on the target loading point and the corresponding loading and conveying system. The NPSH of the mud pump can be determined based on the external characteristic curve. Then, the initial NPSH safety margin of the target underwater mud pump at its initial installation position in the loading and conveying system can be determined. Finally, the initial installation position can be adjusted by combining the initial NPSH safety margin with the NPSH safety margin threshold to obtain the candidate installation position under that loading condition.

[0053] Given the candidate installation locations for each loading condition, the candidate installation location with the largest length L2 of the rake pipe after the pump can be selected from multiple candidate installation locations. This is the installation location that can meet all loading conditions and can be used as the target installation location for the target underwater mud pump.

[0054] The technical solution of this invention involves selecting a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and determining the external characteristic curve of the target underwater mud pump; determining multiple loading conditions based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading constraints for each loading condition, with the loading and conveying system indicating the initial installation position of the target underwater mud pump; matching the pipeline with the mud pump operating point based on the loading and conveying system and external characteristic curve for each loading condition, and determining the target loading condition point by combining the loading constraints for each loading condition; determining the initial cavitation safety margin based on the loading and conveying system and external characteristic curve corresponding to the target loading condition point, and adjusting the initial installation position indicated by the corresponding loading and conveying system based on the cavitation safety margin threshold to obtain the target installation position. This solution determines the appropriate target underwater mud pump for the trailing suction hopper dredger by considering its target hopper capacity, loading time, and preset required head. It also automatically determines the appropriate target installation position for the target underwater mud pump based on the dredger's loading conditions, loading and conveying system, loading constraints, and the characteristics of the target underwater mud pump, thus ensuring the performance of the target underwater mud pump within the trailing suction hopper dredger.

[0055] In one embodiment, a target underwater mud pump is selected from multiple underwater mud pumps based on the target loading time of the trailing suction hopper dredger's hopper capacity and a preset required head, including:

[0056] The expected loading flow rate is determined based on the target loading time of the trailing suction hopper dredger's hopper capacity, and the expected loading flow rate is determined based on the expected loading flow rate.

[0057] Select a target underwater mud pump from a selection chart of mud pumps, such that the expected loading velocity and the preset required head are within the target area of ​​the target underwater mud pump, and the dredging efficiency of the target underwater mud pump within the target area exceeds a set efficiency threshold.

[0058] The expected loading flow rate can be determined based on the target loading time of the hopper capacity, and the expected loading velocity can be determined by combining the inner diameter of the pipeline of the trailing suction hopper dredger.

[0059] A mud pump selection chart can be an important tool for guiding trailing suction hopper dredgers in selecting mud pumps, and can reflect the applicable range of different mud pumps. Figure 3 This is a schematic diagram of a mud pump selection chart provided in Embodiment 1 of the present invention, as shown below. Figure 3 The diagram illustrates the flow rates and heads that submersible mud pumps one through seven can provide. The operating point for the combination of flow rate and head is determined by predicting the loading flow rate and the preset required head. If this operating point falls within the target area of ​​a specific submersible mud pump in the mud pump selection chart, then that submersible mud pump can be selected as the target submersible mud pump.

[0060] In one embodiment, multiple loading conditions are determined based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, along with the loading and conveying system and loading constraints for each loading condition, including:

[0061] Multiple loading conditions are determined, each loading condition corresponds to a dredging depth range and mud characteristics within the dredging depth range, the dredging depth range being defined based on the dredging depth requirements of the trailing suction hopper dredger;

[0062] Determine the loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a rake head, a front rake pipe, the target underwater mud pump, a rear rake pipe, and an inlet pipe along the mud flow direction, and the lengths of the front rake pipe and the rear rake pipe are determined based on the dredging depth range of the corresponding loading condition.

[0063] Determine the loading restrictions for each loading condition, including an upper limit for flow rate, a lower limit for flow rate, and an upper limit for mud pump power. The upper limit for flow rate is determined based on dredging requirements, the lower limit for flow rate is determined based on the flow velocity of the silt in the pipeline to prevent sediment settling, and the upper limit for mud pump power is determined based on the maximum shaft power of the motor.

[0064] Multiple loading conditions are determined. Specifically, based on the minimum and maximum dredging depths indicated by the trailing suction hopper dredger's dredging depth requirements, multiple dredging depth ranges are defined. Each dredging depth range, along with the mud characteristics (i.e., soil type and mud density) within that range, constitutes a loading condition. For example, the dredging depth range could be Range 1, Range 2, etc., and each dredging depth range could correspond to one or more soil types. Each dredging depth range and its corresponding soil type constitute a loading condition. Soil types include silty sand, medium-fine sand, and coarse sand.

[0065] Determine the loading and conveying system for each loading condition, namely, determine the dredging depth Y, the total length of the rake pipe L, the length of the rake pipe before the pump L1, the length of the rake pipe after the pump L2, the length of the inlet pipe L3, and the angle of the rake pipe relative to the ground for each loading condition. Etc., will not be elaborated upon here.

[0066] Determine the loading restrictions for each loading condition. The upper limit of the loading flow rate is determined by combining factors such as the output of the rake head excavation and the loading density with the dredging demand; the lower limit of the loading flow rate is determined based on the flow velocity of the sediment in the pipeline under the loading condition so that no sediment settles; and the upper limit of the mud pump power is determined based on the maximum shaft power of the underwater motor.

[0067] Example 2

[0068] Figure 4 This is a flowchart of a method for determining the installation position of an underwater pump on a trailing suction hopper vessel according to Embodiment 2 of the present invention. This embodiment is based on Embodiment 1 above, and further refines the determination of the target loading condition point by matching the pipeline with the mud pump operating point based on the loading and conveying system and the external characteristic curve based on each loading condition, combined with the loading constraints of each loading condition; and by determining the initial cavitation safety margin based on the loading and conveying system and the external characteristic curve corresponding to the target loading condition point, and adjusting the initial installation position indicated by the corresponding loading and conveying system based on the cavitation safety margin threshold, to obtain the target installation position.

[0069] like Figure 4 As shown, the method includes:

[0070] S110. Based on the target loading time and preset required head of the trailing suction hopper dredger, select a target underwater mud pump from multiple underwater mud pumps and determine the external characteristic curve of the target underwater mud pump.

[0071] S120. Based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, determine multiple loading conditions, as well as the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump.

[0072] S131. For each loading condition, determine the corresponding pipeline mud flow rate and head curve based on the loading and conveying system of the loading condition.

[0073] In this step, the pipeline mud flow rate and head curve of the loading and conveying system under loading conditions can be determined according to the following pipeline mud head calculation formula, that is, the relationship curve between the head and flow rate required when the mud flows in the pipeline of the loading and conveying system.

[0074]

[0075] Among them, h m For pipeline mud lift; and These are the friction coefficients for mud pumps carrying mud and mud pumps carrying clean water, respectively; L is the pipe length; D is the pipe inner diameter; and v is the flow velocity inside the pipe. Z represents the local loss coefficients for components such as the rake head, bends, rubber hoses, and gate valves; Z represents the vertical distance from the water surface line to the center of the sludge discharge pipe outlet; and Y represents the dredging depth of the trailing suction hopper dredger. and ρ represents the density of mud and the density of water, respectively; g is the acceleration due to gravity. In the above formula, all subscripts 1, 2, and 3 represent the rake pipe before the pump, the rake pipe after the pump, and the inlet pipe, respectively.

[0076] S132. Under the loading condition, based on the clear water flow rate and head curve included in the external characteristic curve, determine the mud pump slurry flow rate and head curves corresponding to multiple speeds within the set speed range.

[0077] In this step, the mud pump slurry flow rate and head curves corresponding to multiple speeds within a set speed range can be obtained through the clear water flow rate and head curves. That is, the relationship curve between the head and flow rate provided by the target underwater mud pump during operation.

[0078] In one embodiment, based on the clear water flow-head curve included in the external characteristic curve, determining the mud pump slurry flow-head curves corresponding to multiple rotational speeds within a set rotational speed range includes:

[0079] Within a set speed range, multiple speeds to be processed are obtained by dividing the range at set intervals.

[0080] At each of the required rotational speeds, the mud pump mud flow rate and head curve is obtained by performing mud head soil conversion based on the clean water flow rate and head curve at the required rotational speed.

[0081] The speed range and interval can be set according to actual application needs, and are not limited here.

[0082] Based on the clean water flow rate and head curve at the speed to be treated, the mud pump mud flow rate and head curve at the speed to be treated is obtained by soil conversion, which can be achieved by the following mud pump mud head calculation formula.

[0083]

[0084] Among them, H m and H w These are the mud pump slurry head and the mud pump clean water head, respectively; K H The soil conversion factor is the mud lift. This refers to the density of the mud.

[0085] The mud pump head at different speeds can be calculated using the following similarity law.

[0086]

[0087] Among them, H m H is the mud pump head at rotational speed n. m1 The mud pump head is the mud pump head at a rotational speed n1.

[0088] By combining the two formulas above, the mud pump slurry flow rate and head curves corresponding to multiple speeds within the set speed range can be determined.

[0089] S133. Match the operating point of the pipeline mud flow rate and head curve with the mud pump mud flow rate and head curve to determine the candidate loading operating point. The flow rate of the candidate loading operating point is within the flow rate range corresponding to the loading limit conditions of the loading operating point.

[0090] Match the pipeline slurry flow rate and head curve with the slurry pump slurry flow rate and head curve at the operating point to determine the operating point where the two curves intersect. If the flow rate at this operating point is within the flow rate range corresponding to the loading limit conditions of the loading condition, that is, between the lower and upper limits of the flow rate, then this operating point is determined as a candidate loading operating point under the loading condition.

[0091] S134. Based on the upper limit of mud pump power corresponding to the loading constraints of the loading condition, determine the target loading condition from the candidate loading condition points.

[0092] In this step, the operating point that meets the upper limit of mud pump power corresponding to the loading restriction conditions can be found from the candidate loading operating points, and the optimal target loading operating point can be determined from them.

[0093] In one embodiment, determining the target loading condition point from the candidate loading condition points based on the upper limit of mud pump power corresponding to the loading constraints of the loading condition includes:

[0094] Based on the clear water flow rate and power curve included in the external characteristic curve, the mud pump power of the candidate loading point is determined.

[0095] The candidate loading point with the highest mud pump power within the upper limit of the mud pump power is selected and determined as the target loading point.

[0096] In other words, the flow-power curve of clean water can be converted into the flow-power curve of mud slurry. The mud pump power of each candidate loading point can be determined from the mud slurry flow-power curve. The candidate loading point with the highest mud pump power within the upper limit of mud pump power is determined as the target loading point. In this way, a target loading point can be determined for each loading condition.

[0097] S141. Determine the net positive suction head (NPSH) of the device based on the loading and conveying system corresponding to the target loading point, and determine the net positive suction head of the mud pump based on the clear water flow NPSH curve included in the external characteristic curve.

[0098] S142. Determine the initial cavitation safety margin based on the difference between the net positive suction head (NPSH) of the device and the NPSH of the mud pump.

[0099] S143. Based on the cavitation safety margin threshold and the initial installation position indicated by the loading and conveying system corresponding to the initial cavitation safety margin adjustment, the candidate installation position under the target loading condition point is obtained.

[0100] S144. Select the candidate installation position with the longest corresponding rake pipe length after the pump as the target installation position.

[0101] S141 to S144 will be explained below:

[0102] The cavitation safety margin can be determined by the following formula:

[0103]

[0104] in, NPSHa is the cavitation safety margin; NPSHa is the unit cavitation margin; NPSHar is the mud pump cavitation margin.

[0105] The net positive suction head (NPSH) of an apparatus can be determined using the following formula:

[0106]

[0107] Where A is the vertical distance from the target submersible pump to the mud surface, and L is the total length of the rake pipe. Other parameters in the formula have been explained in S131 and will not be repeated here. By substituting the parameters of the loading and conveying system corresponding to the target loading condition into the formula, the net positive suction head (NPSH) of the device can be determined.

[0108] The net positive suction head (NPSH) of a mud pump can be obtained by converting the mud head to soil type based on the NPSH curve of the clear water flow rate.

[0109] The initial cavitation safety margin of the target underwater mud pump at its initial installation position in the loading and transport system can be determined using the above formula.

[0110] From the formula for net positive suction head (NPSH), it can be seen that, except for L2, which can be considered a variable, all others are quantitative. Assuming the initial installation position of the target underwater mud pump in the loading and conveying system is represented as L0 (which can be understood as the initial value of L2), and the adjusted installation position is represented as... (This can be understood as the adjustment value of L2), and the change in the net positive suction head (NPSH) of the device before and after the installation position of the target underwater mud pump can be calculated.

[0111]

[0112] in, This represents the change in the net positive suction head (NPSH) of the device. The angle of the rake tube relative to the ground is given. Other parameters in the formula have been explained in S131 and will not be repeated here.

[0113] As shown in the above formula, the change in the position of the target underwater mud pump is directly proportional to the change in the net positive suction head (NPSH) of the device. Wherein, The variation range is approximately 0.01 to 0.02, which is negligible, considering the cavitation safety margin. It must be greater than or equal to the cavitation safety margin threshold. The adjusted installation location is simplified as follows, where This is the initial cavitation safety margin.

[0114]

[0115] Using the above formula, the adjusted installation position under the target loading condition point, i.e. the candidate installation position, can be obtained by adjusting the initial installation position indicated by the loading and conveying system based on the cavitation safety margin threshold and the initial cavitation safety margin.

[0116] Ultimately, the candidate installation location with the longest corresponding rake pipe length after the pump was selected as the target installation location.

[0117] The technical solution of this invention matches the operating points of the pipeline slurry flow-head curve with the slurry pump flow-head curve to determine the target loading point for each loading condition. By combining the target loading point with the initial cavitation safety margin of the target subsea slurry pump at its initial installation position in the loading and conveying system corresponding to that loading condition, the candidate installation position to which the target subsea slurry pump should be adjusted can be determined, thus determining the target installation position. This method is highly efficient in determining the target installation position of the target subsea slurry pump.

[0118] The technical solution of this invention can be applied to the addition of underwater mud pumps to trailing suction hopper dredgers, enabling them to break through the original dredging depth limit and improve dredging efficiency. At the same time, while ensuring the performance of the underwater mud pump, the overall cost of the trailing arm system is also taken into account, making it highly practical.

[0119] Example 3

[0120] Figure 5 This is a schematic diagram of a device for determining the installation position of an underwater pump on a trailing suction hopper dredger according to Embodiment 3 of the present invention. This embodiment is applicable to determining the installation position of an underwater mud pump on the drag arm of a trailing suction hopper dredger. Figure 5 As shown, the specific structure of the device includes:

[0121] The first processing module 51 is used to select a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and to determine the external characteristic curve of the target underwater mud pump.

[0122] The second processing module 52 is used to determine multiple loading conditions based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump.

[0123] The third processing module 53 is used to match the pipeline and mud pump operating points based on the loading and conveying system and the external characteristic curve of each loading condition, and to determine the target loading condition point in combination with the loading constraints of each loading condition.

[0124] The fourth processing module 54 is used to determine the initial cavitation safety margin based on the loading and conveying system corresponding to the target loading and conveying point and the external characteristic curve, and to adjust the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain the target installation position.

[0125] The underwater pump installation location determination device for a trailing suction hopper dredger provided in this embodiment uses a first processing module to select a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and determines the external characteristic curve of the target underwater mud pump. A second processing module determines multiple loading conditions, as well as the loading and conveying system and loading constraints for each loading condition, based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger. The loading and conveying system indicates the initial installation location of the target underwater mud pump. A third processing module matches the pipeline with the mud pump operating point based on the loading and conveying system and the external characteristic curve for each loading condition, and determines the target loading condition point based on the loading constraints for each loading condition. A fourth processing module determines the initial cavitation safety margin based on the loading and conveying system corresponding to the target loading condition point and the external characteristic curve, and adjusts the initial installation location indicated by the corresponding loading and conveying system based on the cavitation safety margin threshold to obtain the target installation location. This solution determines the appropriate target underwater mud pump for the trailing suction hopper dredger by considering its target hopper capacity, loading time, and preset required head. It also automatically determines the appropriate target installation position for the target underwater mud pump based on the dredger's loading conditions, loading and conveying system, loading constraints, and the characteristics of the target underwater mud pump, thus ensuring the performance of the target underwater mud pump within the trailing suction hopper dredger.

[0126] Furthermore, the first processing module 51 is specifically used for:

[0127] The expected loading flow rate is determined based on the target loading time of the trailing suction hopper dredger's hopper capacity, and the expected loading flow rate is determined based on the expected loading flow rate.

[0128] Select a target underwater mud pump from a selection chart of mud pumps, such that the expected loading velocity and the preset required head are within the target area of ​​the target underwater mud pump, and the dredging efficiency of the target underwater mud pump within the target area exceeds a set efficiency threshold.

[0129] Furthermore, the second processing module 52 is specifically used for:

[0130] Multiple loading conditions are determined, each loading condition corresponds to a dredging depth range and mud characteristics within the dredging depth range, the dredging depth range being defined based on the dredging depth requirements of the trailing suction hopper dredger;

[0131] Determine the loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a rake head, a front rake pipe, the target underwater mud pump, a rear rake pipe, and an inlet pipe along the mud flow direction, and the lengths of the front rake pipe and the rear rake pipe are determined based on the dredging depth range of the corresponding loading condition.

[0132] Determine the loading restrictions for each loading condition, including an upper limit for flow rate, a lower limit for flow rate, and an upper limit for mud pump power. The upper limit for flow rate is determined based on dredging requirements, the lower limit for flow rate is determined based on the flow velocity of the silt in the pipeline to prevent sediment settling, and the upper limit for mud pump power is determined based on the maximum shaft power of the motor.

[0133] Furthermore, the third processing module 53 is specifically used for:

[0134] For each loading condition, the corresponding pipeline mud flow rate and head curve is determined based on the loading and conveying system of the loading condition.

[0135] Under the loading condition, based on the clear water flow rate and head curve included in the external characteristic curve, the mud pump slurry flow rate and head curves corresponding to multiple speeds within the set speed range are determined.

[0136] The pipeline slurry flow rate and head curve are matched with the slurry pump slurry flow rate and head curve to determine the candidate loading condition point. The flow rate of the candidate loading condition point is within the flow rate range corresponding to the loading condition limit.

[0137] Based on the upper limit of mud pump power corresponding to the loading constraints of the loading conditions, the target loading condition is determined from the candidate loading condition points.

[0138] Furthermore, the third processing module 53 is specifically used for:

[0139] Within a set speed range, multiple speeds to be processed are obtained by dividing the range at set intervals.

[0140] At each of the required rotational speeds, the mud pump mud flow rate and head curve is obtained by performing mud head soil conversion based on the clean water flow rate and head curve at the required rotational speed.

[0141] Furthermore, the third processing module 53 is specifically used for:

[0142] Based on the clear water flow rate and power curve included in the external characteristic curve, the mud pump power of the candidate loading point is determined.

[0143] The candidate loading point with the highest mud pump power within the upper limit of the mud pump power is selected and determined as the target loading point.

[0144] Furthermore, the fourth processing module 54 is specifically used for:

[0145] The net positive suction head (NPSH) of the device is determined based on the loading and conveying system corresponding to the target loading point, and the net positive suction head of the mud pump is determined based on the clear water flow NPSH curve included in the external characteristic curve.

[0146] The initial cavitation safety margin is determined based on the difference between the net positive suction head (NPSH) of the device and the NPSH of the mud pump.

[0147] Based on the cavitation safety margin threshold and the initial installation position indicated by the loading and conveying system corresponding to the initial cavitation safety margin adjustment, the candidate installation position under the target loading condition point is obtained.

[0148] Select the candidate installation location with the longest corresponding rake pipe length after the pump as the target installation location.

[0149] The device for determining the installation location of a trailing suction hopper dredger's underwater pump provided in this embodiment of the invention can execute the method for determining the installation location of a trailing suction hopper dredger's underwater pump provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0150] Example 4

[0151] Figure 6 This is a schematic diagram of the structure of an electronic device implementing embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (such as helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0152] like Figure 6 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded from storage unit 18 into the RAM 13. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0153] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0154] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, digital signal processors (DSPs), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as the method for determining the installation location of a trailing suction hopper dredger's submersible pump.

[0155] In some embodiments, the method for determining the installation location of a trailing suction hopper dredger's underwater pump can be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the method for determining the installation location of a trailing suction hopper dredger's underwater pump described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the method for determining the installation location of a trailing suction hopper dredger's underwater pump by any other suitable means (e.g., by means of firmware).

[0156] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0157] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0158] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0159] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0160] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0161] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0162] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0163] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A method for determining the installation location of an underwater pump on a trailing suction hopper dredger, characterized in that, include: Based on the target loading time and preset required head of the trailing suction hopper dredger, a target underwater mud pump is selected from multiple underwater mud pumps, and the external characteristic curve of the target underwater mud pump is determined. Based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, multiple loading conditions are determined, along with the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump. Based on the loading and conveying system and the external characteristic curves of each loading condition, the pipeline and mud pump operating points are matched, and the target loading condition point is determined by combining the loading constraints of each loading condition. Based on the loading and conveying system corresponding to the target loading point and the external characteristic curve, the initial cavitation safety margin is determined. The initial installation position indicated by the corresponding loading and conveying system is adjusted in combination with the cavitation safety margin threshold to obtain the target installation position.

2. The method according to claim 1, characterized in that, Based on the target loading time and preset required head of the trailing suction hopper dredger, a target underwater mud pump is selected from multiple underwater mud pumps, including: The expected loading flow rate is determined based on the target loading time of the trailing suction hopper dredger's hopper capacity, and the expected loading flow rate is determined based on the expected loading flow rate. Select a target underwater mud pump from a selection chart of mud pumps, such that the expected loading velocity and the preset required head are within the target area of ​​the target underwater mud pump, and the dredging efficiency of the target underwater mud pump within the target area exceeds a set efficiency threshold.

3. The method according to claim 1, characterized in that, Based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, multiple loading conditions are determined, along with the loading and conveying system and loading constraints for each loading condition, including: Multiple loading conditions are determined, each loading condition corresponds to a dredging depth range and mud characteristics within the dredging depth range, the dredging depth range being defined based on the dredging depth requirements of the trailing suction hopper dredger; Determine the loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a rake head, a front rake pipe, the target underwater mud pump, a rear rake pipe, and an inlet pipe along the mud flow direction, and the lengths of the front rake pipe and the rear rake pipe are determined based on the dredging depth range of the corresponding loading condition. Determine the loading restrictions for each loading condition, including an upper limit for flow rate, a lower limit for flow rate, and an upper limit for mud pump power. The upper limit for flow rate is determined based on dredging requirements, the lower limit for flow rate is determined based on the flow velocity of the silt in the pipeline to prevent sediment settling, and the upper limit for mud pump power is determined based on the maximum shaft power of the motor.

4. The method according to claim 1, characterized in that, Based on the loading and conveying system and the external characteristic curves for each loading condition, the pipeline and mud pump operating points are matched. Combined with the loading constraints for each loading condition, the target loading operating point is determined, including: For each loading condition, the corresponding pipeline mud flow rate and head curve is determined based on the loading and conveying system of the loading condition. Under the loading condition, based on the clear water flow rate and head curve included in the external characteristic curve, the mud pump slurry flow rate and head curves corresponding to multiple speeds within the set speed range are determined. The pipeline slurry flow rate and head curve are matched with the slurry pump slurry flow rate and head curve to determine the candidate loading condition point. The flow rate of the candidate loading condition point is within the flow rate range corresponding to the loading condition limit. Based on the upper limit of mud pump power corresponding to the loading constraints of the loading conditions, the target loading condition is determined from the candidate loading condition points.

5. The method according to claim 4, characterized in that, Based on the clear water flow rate and head curve included in the external characteristic curve, determine the mud pump slurry flow rate and head curves corresponding to multiple speeds within a set speed range, including: Within a set speed range, multiple speeds to be processed are obtained by dividing the range at set intervals. At each of the required rotational speeds, the mud pump mud flow rate and head curve is obtained by performing mud head soil conversion based on the clean water flow rate and head curve at the required rotational speed.

6. The method according to claim 4, characterized in that, Based on the upper limit of mud pump power corresponding to the loading constraints of the aforementioned loading conditions, the target loading condition point is determined from the candidate loading condition points, including: Based on the clear water flow rate and power curve included in the external characteristic curve, the mud pump power of the candidate loading point is determined. The candidate loading point with the highest mud pump power within the upper limit of the mud pump power is selected and determined as the target loading point.

7. The method according to claim 1, characterized in that, Based on the loading and conveying system corresponding to the target loading point and the external characteristic curve, the initial cavitation safety margin is determined. Then, the initial installation position indicated by the corresponding loading and conveying system is adjusted according to the cavitation safety margin threshold to obtain the target installation position, including: The net positive suction head (NPSH) of the device is determined based on the loading and conveying system corresponding to the target loading point, and the net positive suction head of the mud pump is determined based on the clear water flow NPSH curve included in the external characteristic curve. The initial cavitation safety margin is determined based on the difference between the net positive suction head (NPSH) of the device and the NPSH of the mud pump. Based on the cavitation safety margin threshold and the initial installation position indicated by the loading and conveying system corresponding to the initial cavitation safety margin adjustment, the candidate installation position under the target loading condition point is obtained. Select the candidate installation location with the longest corresponding rake pipe length after the pump as the target installation location.

8. A device for determining the installation position of an underwater pump on a trailing suction hopper dredger, characterized in that, include: The first processing module is used to select a target underwater mud pump from multiple underwater mud pumps based on the target loading time and preset required head of the trailing suction hopper dredger, and to determine the external characteristic curve of the target underwater mud pump. The second processing module is used to determine multiple loading conditions based on the dredging depth requirements and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading constraints for each loading condition. The loading and conveying system indicates the initial installation position of the target underwater mud pump. The third processing module is used to match the pipeline and mud pump operating points based on the loading and conveying system and the external characteristic curve of each loading condition, and to determine the target loading condition point in combination with the loading constraints of each loading condition. The fourth processing module is used to determine the initial cavitation safety margin based on the loading and conveying system corresponding to the target loading and conveying point and the external characteristic curve, and to adjust the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain the target installation position.

9. An electronic device, characterized in that, include: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor to enable the at least one processor to perform the method as described in any one of claims 1-7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1-7.

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