Method, device and equipment for determining installation position of underwater pump of trailing suction dredger and medium

Abstract

The invention discloses a method, device and equipment for determining the installation position of an underwater pump of a trailing suction dredger and a medium. Selecting a target underwater dredge pump from the plurality of underwater dredge pumps according to the cabin capacity target loading time and the preset required lift of the trailing suction dredger, and determining an external characteristic curve of the target underwater dredge pump; a plurality of loading working conditions and loading conveying systems and loading limiting conditions of the loading working conditions are determined according to the digging depth requirement and the mud characteristics, and the loading conveying systems indicate the initial mounting position of the target underwater mud pump; pipeline and dredge pump working condition point matching is carried out based on the loading conveying system and the external characteristic curve of each loading working condition, and a target loading working condition point is determined by combining loading limiting conditions of each loading working condition; and determining an initial cavitation safety margin based on the loading conveying system corresponding to the target loading working condition point and the external characteristic curve, and adjusting an initial mounting position indicated by the corresponding loading conveying system in combination with a cavitation safety margin threshold to obtain a target mounting position. And performance exertion of the underwater pump in the trailing suction dredger can be ensured.

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 of a trailing suction hopper vessel. Background Art

[0002] With the continuous development of the field of dredging technology, trailing suction hopper dredgers are developing towards large capacity and large dredging depth. In order to ensure the dredging efficiency of large trailing suction hopper dredgers at large dredging depth, 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 will suffer from cavitation. However, it puts higher requirements on the pressure resistance level and sealing performance of the underwater motor, and also increases the burden on the lifting system, resulting in a series of problems such as winch upgrade, wire rope weight increase, and rake arm hanger volume and weight increase. Therefore, it is necessary to determine the reasonable installation position of 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 the remaining trailing suction hopper dredgers equipped with underwater mud pumps lack a specific method for determining the installation position of the underwater mud pumps. Therefore, a method for determining the installation position of the underwater mud pump on the rake arm system is urgently needed. Summary of the Invention

[0005] The present invention provides a method, device, equipment and medium for determining the installation position of an underwater pump of a trailing suction hopper dredger, which can ensure that the performance of a target underwater mud pump in the trailing suction hopper dredger is fully exerted.

[0006] In a first aspect, an embodiment of the present invention provides a method for determining an installation position of a submerged pump of a trailing suction hopper vessel, comprising:

[0007] selecting a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and determining an external characteristic curve of the target underwater dredge pump;

[0008] Determining a plurality of loading conditions, a loading conveying system, and loading restriction conditions for each loading condition based on the dredging depth requirement and mud properties of the trailing suction hopper dredger, wherein the loading conveying system indicates an initial installation position of the target underwater mud pump;

[0009] Matching the pipeline and mud pump operating point based on the loading and conveying system of each loading working condition and the external characteristic curve, and determining the target loading working point in combination with the loading restriction conditions of each loading working condition;

[0010] The initial cavitation safety margin is determined based on the loading and conveying system corresponding to the target loading operating point and the external characteristic curve, and 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] In a second aspect, an embodiment of the present invention provides a device for determining an installation position of a submerged pump of a trailing suction hopper vessel, comprising:

[0012] A first processing module is configured to select a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and to determine an external characteristic curve of the target underwater dredge pump;

[0013] a second processing module for determining a plurality of loading conditions, and a loading conveying system and loading restriction conditions for each loading condition based on a dredging depth requirement and mud properties of the trailing suction hopper dredger, wherein the loading conveying system indicates an initial installation position of the target underwater dredge;

[0014] A third processing module is configured to match the pipeline and the mud pump operating point based on the loading and conveying system of each loading working condition and the external characteristic curve, and determine the target loading working point in combination with the loading restriction conditions of each loading working 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 operating point and the external characteristic curve, 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.

[0016] In a third aspect, an embodiment of the present invention provides 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 executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the method according to the first aspect.

[0020] In a fourth aspect, an embodiment of the present invention provides 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 the embodiment of the present invention is to select a target underwater mud pump from multiple underwater mud pumps according to the target loading time of the tank capacity and the preset required lift of the trailing suction hopper dredger, and determine the external characteristic curve of the target underwater mud pump; determine multiple loading conditions according to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading restrictions of each loading condition, and the loading and conveying system indicates the initial installation position of the target underwater mud pump; match the pipeline with the mud pump working point based on the loading and conveying system and the external characteristic curve of each loading condition, and determine the target loading working point in combination with the loading restrictions of each loading condition; determine the initial cavitation safety margin based on the loading and conveying system and the external characteristic curve corresponding to the target loading working point, 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. This solution determines the appropriate target underwater dredge pump for the trailing suction hopper dredger based on the target loading time of the dredger's cargo capacity and the preset required lift. It automatically determines the appropriate target installation position for the target underwater dredge based on the loading conditions, loading and conveying system, loading restrictions, and characteristics of the target underwater dredge, thereby ensuring the performance of the target underwater dredge pump in the dredger.

[0022] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a flow chart of a method for determining the installation position of a submerged pump of a trailing suction hopper vessel provided in accordance with the first embodiment of the present invention;

[0025] Figure 2 This is a structural diagram of a loading and conveying system provided according to the first embodiment of the present invention;

[0026] Figure 3 is a schematic diagram of a mud pump selection map provided according to the first embodiment of the present invention;

[0027] Figure 4 This is a flow chart of a method for determining the installation position of a submerged pump of a trailing suction hopper vessel provided in accordance with a second embodiment of the present invention;

[0028] Figure 52 is a schematic structural diagram of a device for determining the installation position of an underwater pump of a trailing suction hopper vessel according to a third embodiment of the present invention;

[0029] Figure 6 It is a schematic structural diagram of an electronic device implementing an embodiment of the present invention. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," and the like in the present invention are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0032] Example 1

[0033] Figure 1 This is a flowchart of a method for determining the installation position of an underwater pump for a trailing suction hopper dredger, according to a first embodiment of the present invention. This embodiment is applicable to determining the installation position of an underwater pump on the rake arm of a trailing suction hopper dredger. The method can be performed by a device for determining the installation position of an underwater pump for a trailing suction hopper dredger. The 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, laptop computers, servers, and the like.

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

[0035] S110 , selecting a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and determining an external characteristic curve of the target underwater dredge pump.

[0036] The target loading time for a trailing suction hopper dredger is the time it takes to fill the mud tank, and can be a factory-set parameter. The preset required lift for a trailing suction hopper dredger is the required height required for the dredger's underwater pump to draw in the mud and transfer it to the mud tank. This can be determined based on the actual operation scenario and is not limited here.

[0037] In this step, the estimated loading flow rate for the trailing suction hopper dredger can be determined based on the target loading time. From multiple underwater dredgers, an underwater dredger that meets the estimated loading flow rate and the preset required head requirements and whose efficiency exceeds a set efficiency threshold is selected as the target underwater dredger for the trailing suction hopper dredger. The estimated loading flow rate can be the estimated flow rate for transporting mud into the slurry tank. The set efficiency threshold is not limited.

[0038] Optionally, when selecting a target underwater dredge pump, in addition to the target loading time and the preset required head, the size of the underwater dredge pump can also be considered. For example, a low-pressure pump with three blades can be selected as the target underwater dredge pump. This type of dredge pump is compact, lightweight, and has a high throughput capacity.

[0039] Once a target underwater dredge pump suitable for a trailing suction hopper dredger has been determined, its corresponding external characteristic curve can be determined based on the factory settings of the target underwater dredge pump. The external characteristic curve can be a curve describing the relationship between the main performance parameters of the target underwater dredge pump. The external characteristic curves primarily involved in the present invention may include a clean water flow rate head curve (indicating the relationship between clean water flow rate and head), a clean water flow rate power curve (indicating the relationship between clean water flow rate and power), and a clean water flow rate NPSH curve (indicating the relationship between clean water flow rate and NPSH).

[0040] S120. Determine multiple loading conditions according to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger, as well as a loading and conveying system and loading restriction conditions for each loading condition, wherein the loading and conveying system indicates an initial installation position of the target underwater mud pump.

[0041] The loading and conveying system can be a system that transports mud from the working area to the mud tank. Figure 2 This is a structural diagram of a loading and conveying system provided according to the first embodiment 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 rake pipe in front of the pump, a target underwater mud pump, a rake pipe after the pump, and a tank inlet pipe. Figure 2 Not shown, it can be set at the end of the pump front rake pipe away from the target underwater mud pump; the pump front rake pipe corresponds to Figure 2 Medium length L1 rake pipe; the rake pipe after the pump corresponds to Figure 2 Medium length L2 rake pipe; the cabin pipe corresponds to Figure 2The length of the pipe L3; the sum of the length of the rake pipe before the pump L1 and the length of the rake pipe after the pump L2 can be understood as the total length of the rake pipe. Figure 2 The figure also shows the dredging depth Y and the angle of the dredger to the ground. .

[0042] In this step, a plurality of dredging depth ranges may be divided according to the dredging depth requirement of the trailing suction hopper dredger, and a plurality of loading working conditions may be determined according to a combination of each dredging depth range and the corresponding mud properties within the dredging depth range.

[0043] Under each loading condition, determine the loading conveying system under the loading condition, that is, determine Figure 2 The values ​​of various parameters in the hopper, that is, the positions of various parts included in the loading and conveying system are determined. Among them, the excavation depth Y can be determined by the excavation depth under the loading condition; the total length L of the rake pipe, the length L1 of the rake pipe in front of the pump, and the length L2 of the rake pipe behind the pump can be determined by the excavation depth under the loading condition in combination with the preset, that is, when the excavation depth is large, the corresponding total length L of the rake pipe should be increased. L1 and L2 can 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 in front of the pump and the rake pipe behind the pump when the target underwater mud pump is installed on the rake arm under a certain total length of the rake pipe, which needs to be optimized later; the length L3 of the inlet pipe can be set according to the structure of the suction dredger, and L3 under different loading conditions can be consistent; the angle of the rake pipe to the ground It can be set in combination with the excavation depth Y and the total length of the rake pipe L. It should be noted that different loading conditions involve changes in the length of the pipeline but not in the size of the inner diameter of the pipeline.

[0044] Under each loading condition, the loading constraints for that loading condition are determined. Because the loading constraints of the target underwater mud pump primarily include the mud flow rate within the pipe and the underwater motor power, the loading constraints can include a power constraint for the underwater motor power and a flow constraint for the mud flow rate within the pipe, which are not limited here.

[0045] S130. Matching pipelines and mud pump operating points based on the loading and conveying systems of each loading working condition and the external characteristic curves, and determining a target loading working point in combination with the loading restriction conditions of each loading working condition.

[0046] In this step, for each loading condition, the following operations can be performed: based on the loading and conveying system for that loading condition, the relationship between the head (i.e., resistance loss) and flow rate required for mud to flow through the pipeline in the loading and conveying system is determined; based on the external characteristic curve, the relationship between the head and flow rate provided by the target underwater mud pump during operation is determined; based on these two relationships, operating point matching is performed, that is, an operating point is determined where the head and flow rate of the pipeline and mud pump are consistent; among the matched operating points, an operating point that simultaneously satisfies the power constraint and flow constraint, including the loading constraints, is found and determined 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. Determine an initial cavitation safety margin based on the loading and conveying system corresponding to the target loading operating point and the external characteristic curve, and adjust the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain a target installation position.

[0048] For each loading condition, the total length L of the rake pipe remains unchanged under the loading condition. Without considering the restrictive conditions, the adjustment of the installation position of the target underwater dredge pump, that is, the adjustment of L1 and L2, does not affect the matching calculation results of the working condition point, including the flow rate and the NPSH of the target underwater dredge pump, which remain unchanged. It only affects the NPSH of the target underwater dredge pump.

[0049] The cavitation safety margin is related to the device cavitation margin and the mud pump cavitation margin. Therefore, adjusting the installation position of the target underwater mud pump will affect the cavitation safety margin. The minimum device cavitation margin that meets the cavitation safety margin threshold is the required device cavitation margin. The corresponding installation position of the target underwater mud pump is the necessary installation position of the target underwater mud pump, that is, the installation position that can meet the dredging operation of the target underwater mud pump under the loading condition. It can be understood as a candidate installation position determined based on the loading condition. In the present invention, the candidate installation position can be the installation position represented by the length L2 of the rake pipe behind the pump when the total length L of the rake pipe of the loading conveying system corresponding to the loading condition is constant.

[0050] The NPSH of a dredge pump can be understood as the minimum pressure margin required on the suction side of the dredge pump to prevent cavitation. The device NPSH can be understood as the actual pressure margin provided by the pipeline to the dredge pump inlet. The cavitation safety margin can be understood as the difference between the device NPSH and the NPSH of the dredge pump to ensure that cavitation does not occur in the dredge pump. The cavitation safety margin threshold can be understood as the minimum cavitation safety margin to ensure that cavitation does not occur in the dredge pump.

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

[0052] Specifically, under each loading condition, the cavitation margin of the device can be determined based on the target loading condition point and the corresponding loading conveying system under the loading condition, and the cavitation margin of the mud pump can be determined based on the external characteristic curve, and then the initial cavitation safety margin of the target underwater mud pump at the initial installation position in the loading conveying system can be determined. Then, the initial installation position can be adjusted by combining the initial cavitation safety margin with the cavitation safety margin threshold to obtain the candidate installation position under the loading condition.

[0053] When determining the candidate installation positions under various loading conditions, the candidate installation position with the largest length L2 of the rake pipe behind the pump can be selected from multiple candidate installation positions, that is, the installation position that can meet all loading conditions and be used as the target installation position of the target underwater mud pump.

[0054] The technical solution of the embodiment of the present invention is to select a target underwater mud pump from multiple underwater mud pumps according to the target loading time of the tank capacity and the preset required lift of the trailing suction hopper dredger, and determine the external characteristic curve of the target underwater mud pump; determine multiple loading conditions according to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger, as well as the loading and conveying system and loading restrictions of each loading condition, and the loading and conveying system indicates the initial installation position of the target underwater mud pump; match the pipeline with the mud pump working point based on the loading and conveying system and the external characteristic curve of each loading condition, and determine the target loading working point in combination with the loading restrictions of each loading condition; determine the initial cavitation safety margin based on the loading and conveying system and the external characteristic curve corresponding to the target loading working point, 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. This solution determines the appropriate target underwater dredge pump for the trailing suction hopper dredger based on the target loading time of the dredger's cargo capacity and the preset required lift. It automatically determines the appropriate target installation position for the target underwater dredge based on the loading conditions, loading and conveying system, loading restrictions, and characteristics of the target underwater dredge, thereby ensuring the performance of the target underwater dredge pump in the dredger.

[0055] In one embodiment, a target underwater dredge pump is selected from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, including:

[0056] Determining an estimated loading flow rate according to a target loading time of the trailing suction hopper dredger, and determining an estimated loading flow rate according to the estimated loading flow rate;

[0057] A target underwater dredge pump is selected from a plurality of underwater dredge pumps indicated by a dredge pump selection map, so that the expected loading flow rate and the preset required lift are within a target area of ​​the target underwater dredge pump, and the dredging efficiency of the target underwater dredge pump within the target area exceeds a set efficiency threshold.

[0058] That is, the expected loading flow rate can be determined based on the target loading time of the tank capacity, and the expected loading flow rate can be determined in combination with the inner diameter of the pipeline of the trailing suction hopper dredger.

[0059] The dredge pump selection chart can be an important tool to guide the selection of dredge pumps for trailing suction hopper dredgers, and can reflect the applicable scope of different dredge pumps. Figure 3 Schematic diagram of a mud pump selection diagram provided according to the first embodiment of the present invention, such as Figure 3 The figure shows the flow rate and head that each of the underwater dredge pumps 1 to 7 can provide. The operating point of the flow rate and head combination is determined by the expected loading flow rate and the preset required head. If the operating point falls within the target area of ​​a certain underwater dredge pump in the dredge pump selection chart, the underwater dredge pump can be used as the target underwater dredge pump.

[0060] In one embodiment, multiple loading conditions, as well as loading and conveying systems and loading constraints for each loading condition, are determined based on the dredging depth requirement and mud properties of the trailing suction hopper dredger, including:

[0061] Determining a plurality of loading operating conditions, each loading operating condition corresponding to a dredging depth range and mud characteristics within the dredging depth range, wherein the dredging depth range is divided based on the dredging depth requirement of the trailing suction hopper dredger;

[0062] Determining a loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a drag head, a front drag pipe, the target underwater mud pump, a rear drag pipe, and a tank inlet pipe along the mud flow direction, wherein the lengths of the front drag pipe and the rear drag pipe are determined based on the excavation depth range of the corresponding loading condition;

[0063] Determine the loading restriction conditions for each loading condition, the loading restriction conditions include an upper flow limit, a lower flow limit and an upper limit of mud pump power, the upper flow limit is determined based on the dredging demand, the lower flow limit is determined based on the flow velocity at which the mud and sand in the pipeline do not settle, and the upper limit of mud pump power is determined based on the maximum shaft power of the motor.

[0064] Multiple loading conditions can be determined. Specifically, multiple depth ranges can be created based on the minimum and maximum depths specified by the trailing suction hopper dredger's dredging requirements. Each depth range and the mud properties (i.e., soil quality and density) within that depth range can be combined to form a loading condition. For example, the depth ranges can be range 1, range 2, etc., and each depth range can correspond to one or more soil types. Each depth range and the corresponding soil type are combined to form a loading condition. Examples of soil types include muddy silt, medium-fine sand, and coarse sand.

[0065] Determine the loading and conveying system for each loading condition, that is, determine the digging depth Y, the total length of the rake pipe L, the length of the rake pipe before the pump L1 and the length of the rake pipe after the pump L2, the length of the inlet pipe L3, the angle of the rake pipe to the ground etc., which will not be elaborated here.

[0066] Determine the loading restrictions for each loading condition. The loading restrictions include the upper limit of flow rate determined by factors such as scraper head excavation output and loading density combined with dredging needs; the lower limit of flow rate is determined based on the flow velocity at which sediment in the pipeline does not settle under the loading condition; and the upper limit of mud pump power is determined based on the maximum shaft power of the underwater motor.

[0067] Example 2

[0068] Figure 4 It is a flow chart of a method for determining the installation position of an underwater pump of a trailing suction vessel provided in accordance with the second embodiment of the present invention. This embodiment is based on the above-mentioned first embodiment, and matches the pipeline and mud pump operating point of the loading and conveying system based on each of the loading working conditions and the external characteristic curve, and determines the further refinement of the target loading working point in combination with the loading restriction conditions of each of the loading working conditions; and determines the initial cavitation safety margin based on the loading and conveying system corresponding to the target loading working point and the external characteristic curve, and adjusts the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain a further refinement of the target installation position.

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

[0070] S110 , selecting a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and determining an external characteristic curve of the target underwater dredge pump.

[0071] S120. Determine multiple loading conditions according to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger, as well as a loading and conveying system and loading restriction conditions for each loading condition, wherein the loading and conveying system indicates an initial installation position of the target underwater mud pump.

[0072] S131. For each loading condition, determine a corresponding pipeline mud flow head curve according to the loading and conveying system of the loading condition.

[0073] In this step, the pipeline mud flow head curve of the loading and transporting 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 required for the mud to flow in the pipeline of the loading and transporting system.

[0074]

[0075] Among them, h m It is the pipeline slurry lift; and are the resistance coefficients along the path when pumping mud and clear water respectively; L is the pipe length; D is the inner diameter of the pipe; v is the flow velocity in the pipe; is the local loss coefficient of the drag head, elbow, rubber hose, gate valve, etc.; Z is the vertical distance from the water surface line to the center of the mud discharge pipe outlet; Y is the dredging depth of the trailing suction dredger; and are the slurry density and the water density, respectively; g is the acceleration due to gravity. In the above formula, the subscripts 1, 2, and 3 represent the pump front rake pipe, pump rear rake pipe, and tank inlet pipe, respectively.

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

[0077] In this step, the clean water flow head curve can be converted into mud pump mud flow head curves corresponding to multiple speeds at multiple speeds within the set speed range, that is, the relationship curve between the head and flow provided by the target underwater mud pump during operation.

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

[0079] Within the set speed range, multiple speeds to be processed are obtained according to the set intervals;

[0080] At each of the rotation speeds to be processed, mud head and soil type conversion is performed based on the clean water flow head curve at the rotation speed to be processed, so as to obtain the mud pump mud flow head curve at the rotation speed to be processed.

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

[0082] Based on the clean water flow head curve at the speed to be processed, the mud head soil conversion is performed to obtain the mud pump mud flow head curve at the speed to be processed, which can be achieved through the following mud pump mud head calculation formula.

[0083]

[0084] Among them, H m and H w are the mud pump slurry lift and the mud pump clean water lift respectively; K H is the soil conversion coefficient for mud lift; is the mud density.

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

[0086]

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

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

[0089] S133. Match the pipeline mud flow head curve with the mud flow head curve of the mud pump to determine a candidate loading operating point, where the flow rate of the candidate loading operating point is within the flow rate range corresponding to the loading restriction condition of the loading operating condition.

[0090] The pipeline mud flow head curve is matched with the mud pump mud flow head curve 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 restriction condition of the loading condition, that is, between the lower flow limit and the upper flow limit, then this operating point is determined as a candidate loading operating point under the loading condition.

[0091] S134. Determine a target loading operating point from the candidate loading operating points based on the upper limit of the mud pump power corresponding to the loading restriction condition of the loading operating condition.

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

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

[0094] Determining the mud pump power at the candidate loading operating point based on the clean water flow rate power curve included in the external characteristic curve;

[0095] A candidate loading operating point whose mud pump power is within the mud pump power upper limit and has the maximum mud pump power is selected and determined as the target loading operating point.

[0096] That is, the clean water flow-power curve can be converted into a mud flow-power curve, which can then be used to determine the mud pump power for each candidate loading operating point. The candidate loading operating point with the maximum mud pump power within the upper limit is determined as the target loading operating point. In this way, a target loading operating point can be determined for each loading condition.

[0097] S141. Determine the NPSH of the loading and conveying system device based on the target loading operating point, and determine the NPSH of the mud pump based on the clean water flow NPSH curve included in the external characteristic curve.

[0098] S142. Determine an initial cavitation safety margin based on a difference between the cavitation margin of the device and the cavitation margin 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, a candidate installation position under the target loading operating point is obtained.

[0100] S144: Select the candidate installation position corresponding to the longest length of the rear rake pipe of the pump as the target installation position.

[0101] S141 to S144 are explained as follows:

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

[0103]

[0104] in, is the cavitation safety margin; NPSHa is the cavitation margin of the device; NPSHr is the cavitation margin of the mud pump.

[0105] The NPSH of the device can be determined by the following formula:

[0106]

[0107] Where A is the vertical distance from the target underwater pump to the mud surface, and L is the total length of the rake pipe. The other parameters in the formula have been described in S131 and are not repeated here. Substituting the parameters of the loading conveying system for the loading condition corresponding to the target loading point into this formula, the NPSH of the device can be determined.

[0108] The NPSH of a mud pump can be obtained by converting the mud lift to soil type based on the clean water flow NPSH curve.

[0109] The above formula can be used to determine the initial cavitation safety margin of the target underwater mud pump at the initial installation position in the loading and conveying system.

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

[0111]

[0112] in, is the change in the NPSH of the device, is the angle of the rake pipe to the ground. Other parameters in the formula have been explained in S131 and will not be repeated here.

[0113] From the above formula, we can see that the position change of the target underwater mud pump is proportional to the change of the NPSH. The variation range is about 0.01 to 0.02, which can be ignored. Combined with the cavitation safety margin Must be greater than or equal to the cavitation safety margin threshold , the installation position after adjustment is simplified as follows, where is the initial cavitation safety margin.

[0114]

[0115] Through the above formula, the initial installation position indicated by the loading and conveying system corresponding to the cavitation safety margin threshold and the initial cavitation safety margin can be adjusted to obtain the adjusted installation position under the target loading operating point, that is, the candidate installation position.

[0116] Finally, the candidate installation position corresponding to the longest rake pipe length behind the pump is selected as the target installation position.

[0117] The technical solution of the embodiment of the present invention determines the target loading operating point under each loading condition by matching the pipeline mud flow head curve with the mud pump mud flow head curve. Combined with the target loading operating point, the initial cavitation safety margin of the target underwater mud pump at the initial installation position in the loading conveying system corresponding to the loading condition is determined to determine the candidate installation position to which the target underwater mud pump should be adjusted, thereby determining the target installation position. This solution is highly efficient in determining the target installation position of the target underwater mud pump.

[0118] The technical solution of the embodiment of the present invention can be applied to the installation of underwater mud pumps on a trailing suction hopper dredger, so as to break through the original dredging depth limit and improve the dredging efficiency. At the same time, while ensuring the performance of the underwater mud pump, it also takes into account the overall cost of the rake arm system, and has strong practicality.

[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 the third embodiment of the present invention. This embodiment is applicable to determining the installation position of an underwater mud pump on the rake 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 configured to select a target underwater dredge pump from a plurality of underwater dredge pumps according to the target loading time of the trailing suction hopper dredger and the preset required lift, and determine an external characteristic curve of the target underwater dredge pump;

[0122] a second processing module 52 for determining a plurality of loading conditions, and a loading conveying system and loading restriction conditions for each loading condition according to the dredging depth requirement and mud properties of the trailing suction hopper dredger, wherein the loading conveying system indicates an initial installation position of the target underwater dredger;

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

[0125] The present embodiment provides a device for determining the installation position of an underwater pump for a trailing suction hopper dredger. The device selects a target underwater dredger from a plurality of underwater dredgers and determines an external characteristic curve of the target underwater dredger according to the target loading time and preset required head of the trailing suction hopper dredger through a first processing module. The device determines a plurality of loading conditions, as well as a loading and conveying system and loading restrictions for each loading condition, according to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger through a second processing module. The loading and conveying system indicates an initial installation position of the target underwater dredger. The device matches pipelines and dredger operating points based on the loading and conveying system of each loading condition and the external characteristic curve, and determines a target loading operating point in combination with the loading restrictions of each loading condition. The device determines an initial cavitation safety margin based on the loading and conveying system corresponding to the target loading operating point and the external characteristic curve through a fourth processing module. The device adjusts the initial installation position indicated by the corresponding loading and conveying system in combination with a cavitation safety margin threshold to obtain a target installation position. This solution determines the appropriate target underwater dredge pump for the trailing suction hopper dredger based on the target loading time of the dredger's cargo capacity and the preset required lift. It automatically determines the appropriate target installation position for the target underwater dredge based on the loading conditions, loading and conveying system, loading restrictions, and characteristics of the target underwater dredge, thereby ensuring the performance of the target underwater dredge pump in the dredger.

[0126] Furthermore, the first processing module 51 is specifically configured to:

[0127] Determining an estimated loading flow rate according to a target loading time of the trailing suction hopper dredger, and determining an estimated loading flow rate according to the estimated loading flow rate;

[0128] A target underwater dredge pump is selected from a plurality of underwater dredge pumps indicated by a dredge pump selection map, so that the expected loading flow rate and the preset required lift are within a target area of ​​the target underwater dredge pump, and the dredging efficiency of the target underwater dredge pump within the target area exceeds a set efficiency threshold.

[0129] Furthermore, the second processing module 52 is specifically configured to:

[0130] Determining a plurality of loading operating conditions, each loading operating condition corresponding to a dredging depth range and mud characteristics within the dredging depth range, wherein the dredging depth range is divided based on the dredging depth requirement of the trailing suction hopper dredger;

[0131] Determining a loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a drag head, a front drag pipe, the target underwater mud pump, a rear drag pipe, and a tank inlet pipe along the mud flow direction, wherein the lengths of the front drag pipe and the rear drag pipe are determined based on the excavation depth range of the corresponding loading condition;

[0132] Determine the loading restriction conditions for each loading condition, the loading restriction conditions include an upper flow limit, a lower flow limit and an upper limit of mud pump power, the upper flow limit is determined based on the dredging demand, the lower flow limit is determined based on the flow velocity at which the mud and sand in the pipeline do not settle, and the upper limit of mud pump power is determined based on the maximum shaft power of the motor.

[0133] Furthermore, the third processing module 53 is specifically configured to:

[0134] For each loading condition, determine the corresponding pipeline mud flow head curve according to the loading and conveying system of the loading condition;

[0135] Under the loading condition, based on the clean water flow head curve included in the external characteristic curve, determining the mud pump mud flow head curves corresponding to multiple speeds within a set speed range;

[0136] Matching the pipeline mud flow head curve with the mud flow head curve of the mud pump to determine a candidate loading operating point, wherein the flow rate of the candidate loading operating point is within the flow rate range corresponding to the loading restriction condition of the loading operating condition;

[0137] Based on the upper limit of the mud pump power corresponding to the loading restriction condition of the loading working condition, a target loading operating point is determined from the candidate loading operating points.

[0138] Furthermore, the third processing module 53 is specifically configured to:

[0139] Within the set speed range, multiple speeds to be processed are obtained according to the set intervals;

[0140] At each of the rotation speeds to be processed, mud head and soil type conversion is performed based on the clean water flow head curve at the rotation speed to be processed, so as to obtain the mud pump mud flow head curve at the rotation speed to be processed.

[0141] Furthermore, the third processing module 53 is specifically configured to:

[0142] Determining the mud pump power at the candidate loading operating point based on the clean water flow rate power curve included in the external characteristic curve;

[0143] A candidate loading operating point whose mud pump power is within the mud pump power upper limit and has the maximum mud pump power is selected and determined as the target loading operating point.

[0144] Furthermore, the fourth processing module 54 is specifically configured to:

[0145] Determining the NPSH of the loading and conveying system device based on the target loading operating point, and determining the NPSH of the mud pump based on the clean water flow NPSH curve included in the external characteristic curve;

[0146] Determining an initial cavitation safety margin based on a difference between the cavitation margin of the device and the cavitation margin 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, a candidate installation position under the target loading operating point is obtained;

[0148] The candidate installation position corresponding to the longest rake pipe length behind the pump is selected as the target installation position.

[0149] The device for determining the installation position of a tractor-suction vessel underwater pump provided in an embodiment of the present invention can execute the method for determining the installation position of a tractor-suction vessel underwater pump provided in any embodiment of the present invention, and has functional modules and beneficial effects corresponding to the execution method.

[0150] Example 4

[0151] Figure 6 is a schematic diagram of the structure of an electronic device that implements an embodiment 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 may also represent various forms of mobile devices, such as personal digital assistants, 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 examples and are not intended to limit the implementation of the present invention described and / or claimed herein.

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

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

[0154] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, or microcontroller. The processor 11 executes the various methods and processes described above, such as the method for determining the installation location of a submerged pump on a trailing suction hopper vessel.

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

[0156] Various embodiments of the systems and techniques described above 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), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0157] Computer programs for implementing 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 the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

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

[0159] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device that has: 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 can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the 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 acoustic input, voice input, or tactile input).

[0160] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0161] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0162] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0163] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A method for determining the installation position of a trailing suction hopper underwater pump, characterized in that: include: selecting a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and determining an external characteristic curve of the target underwater dredge pump; Determining a plurality of loading conditions, a loading conveying system, and loading restriction conditions for each loading condition based on the dredging depth requirement and mud properties of the trailing suction hopper dredger, wherein the loading conveying system indicates an initial installation position of the target underwater mud pump; Matching the pipeline and the mud pump operating point based on the loading and conveying system of each loading working condition and the external characteristic curve, and determining the target loading working point in combination with the loading restriction conditions of each loading working condition; The initial cavitation safety margin is determined based on the loading and conveying system corresponding to the target loading operating point and the external characteristic curve, and 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 of the trailing suction hopper dredger and the preset required lift, a target submersible dredge pump is selected from multiple submersible dredge pumps, including: Determining an estimated loading flow rate according to a target loading time of the trailing suction hopper dredger, and determining an estimated loading flow rate according to the estimated loading flow rate; A target underwater dredge pump is selected from a plurality of underwater dredge pumps indicated by a dredge pump selection map, so that the expected loading flow rate and the preset required lift are within a target area of ​​the target underwater dredge pump, and the dredging efficiency of the target underwater dredge pump within the target area exceeds a set efficiency threshold.

3. The method according to claim 1, characterized in that According to the dredging depth requirement and mud characteristics of the trailing suction hopper dredger, multiple loading conditions, as well as the loading and conveying system and loading restriction conditions for each loading condition are determined, including: Determining a plurality of loading operating conditions, each loading operating condition corresponding to a dredging depth range and mud characteristics within the dredging depth range, wherein the dredging depth range is divided based on the dredging depth requirement of the trailing suction hopper dredger; Determining a loading and conveying system for each loading condition, wherein the loading and conveying system includes at least a drag head, a front drag pipe, the target underwater mud pump, a rear drag pipe, and a tank inlet pipe along the mud flow direction, wherein the lengths of the front drag pipe and the rear drag pipe are determined based on the excavation depth range of the corresponding loading condition; Determine the loading restriction conditions for each loading condition, the loading restriction conditions include an upper flow limit, a lower flow limit and an upper limit of mud pump power, the upper flow limit is determined based on the dredging demand, the lower flow limit is determined based on the flow velocity at which the mud and sand in the pipeline do not settle, and the upper limit of mud pump power is determined based on the maximum shaft power of the motor.

4. The method according to claim 1, wherein Matching the pipeline and mud pump operating point based on the loading and conveying system of each loading working condition and the external characteristic curve, and determining the target loading working point in combination with the loading restriction conditions of each loading working condition, including: For each loading condition, determine the corresponding pipeline mud flow head curve according to the loading and conveying system of the loading condition; Under the loading condition, based on the clean water flow head curve included in the external characteristic curve, determining the mud pump mud flow head curves corresponding to multiple speeds within a set speed range; Matching the pipeline mud flow head curve with the mud flow head curve of the mud pump to determine a candidate loading operating point, wherein the flow rate of the candidate loading operating point is within the flow rate range corresponding to the loading restriction condition of the loading operating condition; Based on the upper limit of the mud pump power corresponding to the loading restriction condition of the loading working condition, a target loading operating point is determined from the candidate loading operating points.

5. The method according to claim 4, characterized in that Determining the mud pump mud flow head curves corresponding to a plurality of speeds within a set speed range based on the clean water flow head curve included in the external characteristic curve includes: Within the set speed range, multiple speeds to be processed are obtained according to the set intervals; At each of the rotation speeds to be processed, mud head and soil type conversion is performed based on the clean water flow head curve at the rotation speed to be processed, so as to obtain the mud pump mud flow head curve at the rotation speed to be processed.

6. The method according to claim 4, characterized in that Determining a target loading operating point from the candidate loading operating points based on the upper limit of the mud pump power corresponding to the loading restriction condition of the loading operating condition includes: Determining the mud pump power at the candidate loading operating point based on the clean water flow rate power curve included in the external characteristic curve; A candidate loading operating point whose mud pump power is within the mud pump power upper limit and has the maximum mud pump power is selected and determined as the target loading operating point.

7. The method according to claim 1, characterized in that Determining an initial cavitation safety margin based on the loading and conveying system corresponding to the target loading operating point and the external characteristic curve, and adjusting the initial installation position indicated by the corresponding loading and conveying system in combination with the cavitation safety margin threshold to obtain a target installation position, including: Determining the NPSH of the loading and conveying system device based on the target loading operating point, and determining the NPSH of the mud pump based on the clean water flow NPSH curve included in the external characteristic curve; Determining an initial cavitation safety margin based on a difference between the cavitation margin of the device and the cavitation margin 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, a candidate installation position under the target loading operating point is obtained; The candidate installation position corresponding to the longest rake pipe length behind the pump is selected as the target installation position.

8. A device for determining the installation position of a submerged pump of a trailing suction hopper vessel, characterized in that: include: A first processing module is configured to select a target underwater dredge pump from a plurality of underwater dredge pumps according to a target loading time of the trailing suction hopper dredger and a preset required lift, and to determine an external characteristic curve of the target underwater dredge pump; a second processing module for determining a plurality of loading conditions, and a loading conveying system and loading restriction conditions for each loading condition based on a dredging depth requirement and mud properties of the trailing suction hopper dredger, wherein the loading conveying system indicates an initial installation position of the target underwater dredge; A third processing module is configured to match the pipeline and the mud pump operating point based on the loading and conveying system of each loading working condition and the external characteristic curve, and determine the target loading working point in combination with the loading restriction conditions of each loading working 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 operating point and the external characteristic curve, 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.

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 executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the method according to any one of claims 1 to 7.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the program is executed by a processor, the method according to any one of claims 1 to 7 is implemented.

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