A ship cooler and its control method

Abstract

The present application relates to a ship cooler and its control method, belonging to the field of box coolers. It mainly includes a tube bundle box, on which a mounting frame is fixedly installed. On the mounting frame, a tube sheet is fixedly installed. On the tube sheet, a number of cooling tube bundles for conveying a cooling medium are installed. The cooling tube bundles are all arranged in a U shape, and a water passage for seawater to flow through is formed between the several cooling tube bundles. A valve cover is fixedly installed on the tube sheet, and a first flange for the cooling medium to flow in and a second flange for the cooling medium to flow out are installed on the valve cover; on the box body of the tube bundle box, a water inlet grille and a water outlet grille are provided. The water inlet grille is arranged at the bottom of the tube bundle box and is located directly below the cooling tube bundles; the water outlet grille is arranged on the side wall of the tube bundle box and is located on the side of the cooling tube bundles; a flow disturbance structure and a descaling device are installed in the tube bundle box. The present application can reduce the occurrence of blockage of the cooling tube bundles of the marine box cooler.

Description

Technical Field

[0001] This application relates to the field of box coolers, and particularly to a ship cooler and its control method. Background Art

[0002] The box cooler, also known as the outboard cooler, is a cooler composed of multiple bundles of copper tubes directly installed in the seawater tank, saving engine room space and operating costs. The box cooler is generally used for cooling purposes in systems such as main engines, generators, and auxiliary equipment, and applicable ship types include medium and small-sized cargo ships, oil tankers, tugboats, barges, fishing boats, ferries, supply ships, refrigerated ships, icebreakers, etc.

[0003] In the prior art, the common box cooler mainly consists of parts such as a water tank, a partition spacer, a tube sheet, a mounting gasket, a mounting flange, and a tube bundle. The integrated U-shaped tube bundle is expanded onto the tube sheet, and then the tube sheet is fixed to the mounting flange on the top plate of the seawater tank through bolts. The cooling effect of the box cooler is achieved through forced circulation during ship navigation or natural convection when stationary: when the ship is in a navigation state, the cooling seawater enters the seawater tank through the intake grille, and then flows out along the outside of the U-shaped tube bundle through the outlet grille, achieving the cooling effect through the forced circulation process of the cooling seawater generated by ship navigation. When the ship is in a non-navigation state such as at a dock or an anchorage, the cooling seawater in the seawater tank exchanges heat with the in-ship cooling fresh water system. The outboard seawater becomes less dense due to the increase in temperature and thus flows upward and is discharged from the seawater tank. At the same time, the seawater with a lower temperature at the bottom enters the seawater tank through the intake grille, thus forming an upward natural circulation process and ultimately achieving the cooling effect.

[0004] However, there are many problems with the existing ship box coolers. In terms of pipeline blockage, the tube bundles of the box cooler are dense and have a large flow diameter, resulting in a slow water flow rate, especially near the pipe wall, making it easy for suspended particles in the water to precipitate and form scale. Moreover, its structure is fixed and unlike traditional plate coolers, it cannot be disassembled and cleaned. Long-term operation or improper operation is likely to cause internal dirt accumulation, hindering the circulation of the heat medium and affecting the cooling efficiency and reliability; the turbid water quality in inland seas causes the inner surface of the sea chest to be easily deposited with mud scale, interfering with the inflow and outflow of water in the box, resulting in temperature rise and a decline in the cooling effect, and the attachment of sludge will also weaken the heat exchange efficiency. Summary of the Invention

[0005] In order to achieve the technical effect of automatic descaling of the tube bundle box and reduce the occurrence of blockage between the cooling tube bundles in the tube bundle box, this application provides a ship cooler and its control method.

[0006] A ship cooler and its control method provided by this application adopt the following technical solutions:

[0007] A ship cooler and its control method, mainly including a tube bundle box, on which a mounting frame is fixedly installed, on which a tube sheet is fixedly installed, and a number of cooling tube bundles for conveying a cooling medium are installed on the tube sheet. The cooling tube bundles are all arranged in a U shape, and a water passage for seawater to flow through is formed between the several cooling tube bundles. A valve cover is fixedly installed on the tube sheet, and a first flange for the cooling medium to flow in and a second flange for the cooling medium to flow out are installed on the valve cover;

[0008] An intake grille and an outlet grille are arranged on the box body of the tube bundle box. The intake grille is arranged at the bottom of the tube bundle box and is located directly below the cooling tube bundles; the outlet grille is arranged on the side wall of the tube bundle box and is located on the side of the cooling tube bundles;

[0009] A flow disturbing structure and a descaling device are installed in the tube bundle box.

[0010] By adopting the above technical solutions, during the process of the ship traveling on the route, the cooling medium flows in through the first flange, is shunted by a plurality of cooling tube bundles, and finally flows out through the second flange. During the process of the cooling medium flowing through the cooling tube bundles, seawater flows into the tube bundle box from the intake grille, and after passing through the water passage between the cooling tube bundles, it takes out the heat in the cooling medium in the cooling tube bundles, achieving the technical effect of cooling the cooling tube bundles; the flow disturbing structure can disturb the seawater entering the tube bundle box, making the impurities carried in the seawater uniform, and preventing the situation that the impurities float on the upper layer of the tube bundle box and adhere to the outer wall of the cooling tube bundles; at the same time, through the setting of the descaling device in the tube bundle box, the inside of the tube bundle box can be automatically descaled.

[0011] Preferably, the descaling device includes:

[0012] A flow velocity monitoring unit, installed in the tube bundle box, for monitoring the flow velocity of seawater in the tube bundle box;

[0013] A turbidity monitoring unit, installed on the tube bundle box, for monitoring the water turbidity of the seawater flowing through the inside of the tube bundle box;

[0014] A data processor, signal-connected to the signal input ends of the flow velocity monitoring unit and the turbidity monitoring unit, for calculating the fouling coefficient in the tube bundle box according to the flow velocity data and the water turbidity data, and outputting a descaling control signal when the fouling coefficient reaches the descaling threshold;

[0015] An ultrasonic descaling module, fixedly installed in the tube bundle box, signal-connected to the signal output end of the data processor, for receiving the descaling control signal and operating.

[0016] By adopting the above technical solution, during the process of the ship moving on the route, the flow velocity monitoring unit monitors the flow velocity passing through the tube bundle box in real time and outputs flow velocity data, and the turbidity monitoring unit monitors the turbidity of the seawater passing through the tube bundle box in real time and outputs turbidity data. After receiving the flow velocity data and turbidity data, the data processor calculates the fouling coefficient Q in the tube bundle box. By comparing the fouling coefficient Q, when the fouling coefficient Q reaches the descaling threshold, a descaling control signal can be output.

[0017] Preferably, two groups of L-shaped mounting seats are fixedly installed on the outer side wall of the tube bundle box. The two groups of L-shaped mounting seats are respectively arranged on the upper and lower sides of the water outlet grille. Turbines are respectively rotatably installed on the two groups of L-shaped mounting seats, and induction bumps are arranged on the turbines.

[0018] The flow velocity monitoring unit includes:

[0019] A number of ultrasonic ranging sensors are fixedly installed on the outer side wall of the tube bundle box, and are respectively opposite to the mounting parts of a number of the turbines, and are used for monitoring the distance to the front shielding surface and outputting an induction distance signal;

[0020] A number of comparators are respectively signal-connected to the signal output ends of a number of the ultrasonic ranging sensors, and are used for receiving the induction distance signal and outputting a high-level signal when the induction distance signal is less than a set distance;

[0021] A single-chip microcomputer is signal-connected to the signal output ends of a number of the comparators, and is used for receiving the high-level signal and calculating the flow velocity of the seawater in the tube bundle box.

[0022] By adopting the above technical solution, when the tube bundle box is immersed in seawater and the seawater enters the tube bundle box through the water inlet grille and flows out through the water outlet grille, the flowing seawater drives the turbine to rotate. Since the rotation speed of the turbine is positively correlated with the flow velocity of the seawater, by using the ultrasonic ranging sensor and the comparator in combination, when the turbine rotates to make the induction bump opposite to the induction end of the ultrasonic ranging sensor, the induction distance measured by the ultrasonic ranging sensor is less than the set distance, the comparator outputs a high-level signal, and the single-chip microcomputer can calculate the flow velocity of the seawater based on the occurrence frequency of multiple high-level signals, achieving the technical effect of automatically detecting the flow velocity of the seawater in the tube bundle box.

[0023] Preferably, the turbidity monitoring unit includes a turbidity sensor, and the turbidity sensor is fixedly installed inside the box body of the tube bundle box.

[0024] By adopting the above technical solution, the turbidity of the seawater flowing through the tube bundle box can be monitored in real time through the turbidity sensor.

[0025] Preferably, the ultrasonic descaling module includes two ultrasonic descaling devices, which are installed on the top of the tube bundle box through connecting flanges. The vibrating heads of the two ultrasonic descaling devices extend into the tube bundle box, and the vibrating heads of the two ultrasonic descaling devices are located on both sides of the cooling tube bundle.

[0026] By adopting the above technical solution, when descaling is required, the data processing module controls the operation of the two ultrasonic descaling devices. The ultrasonic descaling devices drive the vibrating heads to vibrate at high frequency, which can drive the water body to scour the cooling tube bundle at high frequency. The scale attached to the outer wall of the cooling tube bundle falls off the tube wall after being vibrated and is discharged through the water outlet grille together with the flowing water body.

[0027] Preferably, it further includes a first bracket and a second bracket. A number of jacks adapted to the tube bodies of the cooling tube bundles are provided on the first bracket and the second bracket. The number of jacks is evenly arranged in a linear array on the first bracket and the second bracket. The first bracket and the second bracket are sleeved on a number of the cooling tube bundles.

[0028] By adopting the above technical solution, since the tube bodies of the cooling tube bundles are inserted into the jacks on the first bracket and the second bracket, and the jacks are evenly arranged in a linear array on the first bracket and the second bracket, the positions of the cooling tube bundles can be restricted by the first bracket and the second bracket, ensuring that the water passage formed between the cooling tube bundles is uniform and reducing the occurrence of deformation and displacement of the cooling pipes.

[0029] Preferably, the flow disturbance structure includes a plurality of flow disturbance plates, and the plurality of flow disturbance plates are fixedly installed in the box body of the tube bundle box.

[0030] By adopting the above technical solution, the seawater flowing into the tube bundle box is disturbed by the flow disturbance plates, so that the impurities in the seawater are evenly distributed in the seawater and flow out through the water passage between the cooling tube bundles, reducing the occurrence of impurities floating on the surface of the seawater and adhering to the box body and the cooling tube bundles.

[0031] The present application also provides a control method for a ship cooler according to the above ship cooler, which mainly includes the following steps:

[0032] Step S1: Collect the tube bundle box monitoring data of the seawater flowing through the tube bundle box. The tube bundle box monitoring data includes the flow rate data and turbidity data of the seawater;

[0033] Step S2: Calculate the fouling coefficient Q in the tube bundle box based on the flow rate data and turbidity data by a data processor;

[0034] Step S3: Set a descaling threshold e, compare the fouling coefficient Q, and control the ultrasonic descaling module to operate to perform a descaling operation when the fouling coefficient Q reaches the descaling threshold.

[0035] By adopting the above technical solution, by collecting the flow velocity data and turbidity data of the seawater flowing into the tube bundle box, the data processor calculates the fouling coefficient Q in the tube bundle box according to the collected flow velocity data and turbidity data. By comparing the fouling coefficient Q, when the fouling coefficient Q reaches the descaling threshold, the ultrasonic descaling module can be controlled to perform descaling operation on the tube bundle box, and the technical effect of automatic descaling can be achieved.

[0036] Preferably, the step S1 includes the following steps:

[0037] Step S11: A flow velocity monitoring unit is arranged in the tube bundle box to collect the flow velocity data output by the flow velocity monitoring unit at an interval of 6 minutes;

[0038] Step S12: A turbidity monitoring unit is arranged in the tube bundle box to collect the turbidity data output by the turbidity monitoring unit at an interval of 6 minutes.

[0039] By adopting the above technical solution, collecting the turbidity data and flow velocity data at an interval of 6 minutes can facilitate the data processor to calculate the fouling coefficient Q in the tube bundle box at an interval of 6 minutes.

[0040] Preferably, the step S2 includes the following steps:

[0041] Step S21: Obtain the flow velocity data and turbidity data of the seawater in the tube bundle box, and through the formula Calculate Q; in the formula, a is the weight of the flow velocity data, b is the weight of the turbidity data, Vn is the flow velocity data of the seawater, Zn is the turbidity data of the seawater, and n represents the number of detections.

[0042] By adopting the above technical solution, the fouling coefficient can be calculated based on the flow velocity data and turbidity data through the formula, and the fouling amount in the tube bundle box can be fed back through the fouling coefficient. As time increases, the fouling Q gradually increases. When the turbidity coefficient increases to reach the descaling threshold, the data processor controls the ultrasonic descaling module to operate to perform the descaling operation.

[0043] In summary, a ship cooler and its control method of the present application include at least one of the following beneficial technical effects:

[0044] 1. During the process of a ship moving on a route, the cooling medium flows in through the first flange, is shunted through multiple cooling tube bundles, and finally flows out through the second flange. During the process of the cooling medium flowing through the cooling tube bundles, seawater flows into the tube bundle box from the water inlet grille, and after passing through the water passage between the cooling tube bundles, it takes out the heat in the cooling medium in the cooling tube bundles, achieving the technical effect of cooling the cooling tube bundles; the turbulence structure can make the seawater entering the tube bundle box turbulent, making the impurities carried in the seawater uniform, and preventing the situation where impurities float on the upper layer of the tube bundle box and adhere to the outer wall of the cooling tube bundles; at the same time, through the setting of the descaling device in the tube bundle box, the inside of the tube bundle box can be automatically descaled.

[0045] 2. When the tube bundle box is immersed in seawater and the seawater enters the tube bundle box through the water inlet grille and flows out through the water outlet grille, the flowing seawater drives the turbine to rotate. Since the rotation speed of the turbine is positively correlated with the flow rate of the seawater, by using the ultrasonic ranging sensor and the comparator in combination, when the turbine rotates to the position where the induction bump is opposite to the induction end of the ultrasonic ranging sensor, the induction distance measured by the ultrasonic ranging sensor is less than the set distance, and the comparator outputs a high-level signal. The single-chip microcomputer can calculate the flow rate of the seawater in the tube bundle box based on the occurrence frequency of multiple high-level signals, achieving the technical effect of automatically detecting the flow rate of the seawater in the tube bundle box.

[0046] 3. The spoiler is used to disturb the seawater flowing into the tube bundle box, so that the impurities in the seawater are evenly distributed in the seawater and flow out through the water passage between the cooling tube bundles, reducing the situation where impurities float on the seawater surface and adhere to the box body and the cooling tube bundles.

[0047] 4. By collecting the flow rate data and turbidity data of the seawater flowing into the tube bundle box, the data processor calculates the fouling coefficient Q of the tube bundle box according to the collected flow rate data and turbidity data. By comparing the fouling coefficient Q, when the fouling coefficient Q reaches the descaling threshold, the ultrasonic descaling module can be controlled to descale the tube bundle box, achieving the technical effect of automatic descaling. Description of the Drawings

[0048] Figure 1 is a schematic diagram showing the overall structure of the cooler in the embodiment of the present application.

[0049] Figure 2 is a schematic diagram showing the water inlet grille and the water outlet grille on the tube bundle box in the embodiment of the present application.

[0050] Figure 3 is Figure 1 the enlarged schematic diagram at A in

[0051] Figure 4 is a schematic diagram showing the installation position of the ultrasonic ranging sensor in the embodiment of the present application.

[0052] Figure 5 This is a schematic diagram for showing the internal signal transmission of the cooler in the embodiment of the present application.

[0053] Figure 6 This is the overall flowchart for showing the control method of the cooler in the embodiment of the present application.

[0054] Description of reference numerals: 1, tube bundle box; 11, water inlet grille; 12, water outlet grille; 13, L-shaped mounting seat; 14, turbine; 141, induction bump; 15, spoiler; 16, bottom plate; 17, side plate; 2, mounting frame; 3, tube sheet; 4, cooling tube bundle; 41, first bracket; 42, second bracket; 421, jack; 5, valve cover; 51, first flange; 52, second flange; 6, descaling device; 61, flow velocity monitoring unit; 611, ultrasonic ranging sensor; 62, turbidity monitoring unit; 63, ultrasonic descaling device. Detailed implementation manners

[0055] The following further elaborates on the present application in conjunction with the attached Figures 1 - 6 drawings.

[0056] Embodiment 1

[0057] The embodiment of the present application discloses a ship cooler and its control method. Refer to Figures 1 - 6 , which mainly includes a tube bundle box 1. The tube bundle box 1 is a sealed box body. An installation frame 2 is installed on the top of the tube bundle box 1 by screws. A tube sheet 3 is fixedly installed on the installation frame 2 by screws. A number of U-shaped cooling tube bundles 4 are installed on the tube sheet 3 by expansion joint. The cooling tube bundles 4 are uniformly arranged in a linear array on the tube sheet 3. A water passage for seawater to flow through is formed between the cooling tube bundles 4.

[0058] A valve cover 5 is fixedly installed on the tube sheet 3 by bolts. The valve cover 5 is provided with a first flange 51 and a second flange 52 for connecting with external pipelines. Among them, the first flange 51 is used for the inflow of the cooling medium, and the second flange 52 is used for the outflow of the cooling medium.

[0059] Among them, in order to ensure the tightness of the connection between the valve cover 5, the installation frame 2 and the tube sheet 3, in this embodiment, gaskets are installed between the valve cover 5 and the tube sheet 3, and between the installation frame 2 and the tube sheet 3.

[0060] Refer to Figure 1 and Figure 2, in the embodiment of the present application, the tube bundle box 1 includes a bottom plate 16 and side plates 17. An inlet grille 11 is provided on the bottom plate 16, and an outlet grille 12 is provided on the side plates 17; and the side plates 17 and the bottom plate 16 are bent and formed from a single piece of steel. The inlet grille 11 is composed of a plurality of kidney-shaped inlet holes, and the inlet grille 11 is located directly below the cooling tube bundle 4; the outlet grille 12 is composed of a plurality of kidney-shaped outlet holes, and the outlet grille 12 is located on the side of the cooling tube bundle 4. It should be noted that the inlet holes are opened along the width direction of the ship, and the outlet holes are opened along the length direction of the ship.

[0061] During the process of the ship moving along the route, the cooling medium is dispersed and flows into a number of cooling tube bundles 4 through the first flange 51, and is dispersed into a plurality of shunts by the number of cooling tube bundles 4 and flows out through the second flange 52. During the process of the cooling medium flowing through the cooling tube bundles 4, seawater enters the tube bundle box 1 through the inlet holes and flows out of the tube bundle box 1 through the outlet holes. The flowing seawater absorbs the heat carried in the cooling medium and takes it out, which can achieve the technical effect of cooling the cooling medium.

[0062] Refer to Figure 2 And Figure 3 , in the embodiment of the present application, a first bracket 41 and a second bracket 42 are sleeved on the cooling tube bundle 4. The first bracket 41 is located at a position close to the lower part of the cooling tube bundle 4, and the second bracket 42 is located at a position close to the upper part of the cooling tube bundle 4. A number of jacks 421 adapted to the cooling tube bundle 4 are opened on both the first bracket 41 and the second bracket 42, and the jacks 421 are evenly arranged on the first bracket 41 and the second bracket 42.

[0063] The tube body of the cooling tube bundle 4 is inserted into the jacks 421 on the first bracket 41 and the second bracket 42. The jacks 421 are evenly arranged in a linear array on the first bracket 41 and the second bracket 42, and the position of the cooling tube bundle 4 can be restricted by the first bracket 41 and the second bracket 42, ensuring that the water passage formed between the cooling tube bundles 4 is uniform and reducing the occurrence of deformation and displacement of the cooling pipes.

[0064] It should be noted that, in this embodiment, in order to further reduce the situation that impurities carried in the seawater adhere to the cooling tube bundle 4 and cause blockage of the cooling tube bundle 4, a nano-superhydrophobic coating with a special microstructure is coated on the cooling tube bundle 4. In some other embodiments, according to actual usage needs, a multi-layer filter pre-filtering device can also be installed at the inlet of the water inlet pipe of the seawater tank, which will not be limited and elaborated here.

[0065] Furthermore, in the embodiment of the present application, a flow disturbance structure and a descaling device 6 are installed in the tube bundle box 1.

[0066] Among them, refer to Figure 1 , Figure 2 AndFigure 5 , the descaling device 6 includes a flow velocity monitoring unit 61, a turbidity monitoring unit 62 and an ultrasonic descaling module installed in the tube bundle box 1. The flow velocity monitoring unit 61 is used to monitor the flow velocity of the seawater flowing through the tube bundle box 1 and output the flow velocity data of the seawater. The turbidity monitoring unit 62 is used to monitor the turbidity of the seawater flowing through the tube bundle box 1 and output the turbidity data of the seawater.

[0067] The signal output ends of the flow velocity monitoring unit 61 and the turbidity monitoring unit 62 are connected to the data processor through a data cable. The signal input end of the ultrasonic descaling module is connected to the signal output end of the data processor through a data cable. The data processor receives the flow velocity data and turbidity data of the seawater, calculates the fouling coefficient in the tube bundle box 1, and makes a real-time comparison of the fouling coefficient. When the fouling coefficient reaches the descaling threshold, the data processor controls the ultrasonic descaling module to start. The ultrasonic descaling module drives the seawater flowing through the tube bundle box 1 to scour the outer wall of the cooling tube bundle 4 through high-frequency vibration, brushes off the silt and impurities attached to the outer wall of the cooling tube bundle 4 and discharges them through the outlet grille.

[0068] Refer to Figure 4 , in the embodiment of the present application, two sets of oppositely arranged L-shaped mounting seats 13 are fixedly installed on the outer side wall of the side plate 17. The two sets of L-shaped mounting plates are located on the upper and lower sides of the water outlet grille 12, and turbines 14 are respectively fixedly installed on the two sets of L-shaped mounting plates; the flow velocity monitoring unit 61 includes a plurality of ultrasonic ranging sensors 611 fixedly installed on the outer side wall of the side plate 17. The model of the ultrasonic ranging sensor 611 is ME-PC-8C, and the ultrasonic ranging sensors 611 are in one-to-one correspondence with a plurality of turbines 14.

[0069] Among them, induction bumps 141 are fixedly installed on the side walls of the turbines 14 close to the ultrasonic ranging sensors 611 by welding; the signal output ends of the ultrasonic ranging sensors 611 are respectively connected to a comparator through signal lines, and the signal output end of the comparator is signal-connected to a single-chip microcomputer of model STC12C2052AD through a signal line.

[0070] When the seawater flows out through the water outlet grille 12 and drives the turbines 14 to rotate, the rotation of the turbines 14 can drive the induction bumps 141 to rotate past the ultrasonic ranging sensors 611. When the induction bumps 141 pass by the ultrasonic ranging sensors 611, the measured induction distance of the ultrasonic ranging sensors 611 is less than the set value, and the comparator outputs a high-level signal after comparison.

[0071] The single-chip microcomputer receives multiple high-level signals, calculates the occurrence frequencies of the multiple high-level signals respectively, and then takes the average value, so as to calculate the average rotation speed of the turbine 14. Since the rotation speed of the turbine 14 is positively correlated with the flow rate of seawater (that is, the faster the seawater flow rate, the faster the rotation speed of the turbine 14, and the slower the seawater flow rate, the slower the rotation speed of the turbine 14), the single-chip microcomputer can calculate the flow rate of seawater flowing through the tube bundle box 1 based on the average value of the occurrence frequencies of the high-level signals, achieving the technical effect of automatically monitoring the seawater flow rate in the tube bundle box 1.

[0072] It should be noted that, in this embodiment, the turbidity monitoring unit 62 uses a turbidity sensor with the model STM. The turbidity sensor is fixedly installed inside the box body of the tube bundle box 1 by screws. Through the turbidity sensor, the turbidity of the seawater flowing through the inside of the tube bundle box 1 can be monitored in real time.

[0073] Refer to Figure 1 , in this embodiment, the ultrasonic descaling module uses two ultrasonic descaling devices 63, the model of the ultrasonic descaling device 63 is, the two ultrasonic descaling devices 63 are respectively installed on the top of the body of the tube bundle box 1 through connecting flanges, the vibration heads of the two ultrasonic descaling devices 63 extend into the tube bundle box 1, and the vibration heads of the two ultrasonic descaling devices 63 are located on both sides of the cooling tube bundle 4 array.

[0074] When descaling is required, the data processing module controls the two ultrasonic descaling devices 63 to operate. The ultrasonic descaling devices 63 drive the vibration heads to vibrate at high frequency, which can drive the water body to scour the cooling tube bundle 4 at high frequency. The scale attached to the outer wall of the cooling tube bundle 4 falls off the tube wall after being vibrated and is discharged through the water outlet grille 12 together with the flowing water body.

[0075] It should be noted that, in some other embodiments, according to the size of the internal space of the tube bundle box 1 and the layout of the internal structure, the number of ultrasonic descaling devices 63 can be increased or decreased, and the installation position of the ultrasonic descaling devices 63 can also be changed, which will not be limited and elaborated here.

[0076] Refer to Figure 1 And Figure 2 , in this embodiment, the flow disturbance structure includes a plurality of flow disturbance plates 15 fixedly installed on the inner wall of the side plate 17. The seawater flowing into the tube bundle box 1 is disturbed by the flow disturbance plates 15, so that the impurities in the seawater are evenly distributed in the seawater and flow out through the water passage between the cooling tube bundles 4, reducing the situation that impurities float on the surface of the seawater and adhere to the box body and the cooling tube bundle 4.

[0077] Based on the ship cooler in the above technical solution, the present application also proposes a control method for a ship cooler, which mainly includes the following steps: Step S1: Collect the tube bundle box monitoring data of the seawater flowing through the tube bundle box, and the tube bundle box monitoring data includes the flow rate data and turbidity data of the seawater;

[0078] Step S2: Based on the flow velocity data and turbidity data, the data processor calculates the fouling coefficient Q inside the tube bundle box;

[0079] Step S3: Set a descaling threshold e, compare the fouling coefficient Q, and when the fouling coefficient Q reaches the descaling threshold, control the ultrasonic descaling module to operate to perform the descaling operation.

[0080] By collecting the flow velocity data and turbidity data of the seawater flowing into the tube bundle box, the data processor calculates the fouling coefficient Q inside the tube bundle box according to the collected flow velocity data and turbidity data. By comparing the fouling coefficient Q, when the fouling coefficient Q reaches the descaling threshold, the ultrasonic descaling module can be controlled to perform the descaling operation on the tube bundle box, and the technical effect of automatic descaling can be achieved.

[0081] Among them, step S1 includes the following steps: Step S11: Set a flow velocity monitoring unit inside the tube bundle box to collect the flow velocity data output by the flow velocity monitoring unit at a time interval of 6 minutes;

[0082] Step S12: Set a turbidity monitoring unit inside the tube bundle box to collect the turbidity data output by the turbidity monitoring unit at a time interval of 6 minutes.

[0083] Step S2 includes the following steps: Obtain the flow velocity data and turbidity data of the seawater inside the tube bundle box, and through the formula Calculate Q; in the formula, a is the weight of the flow velocity data, b is the weight of the turbidity data, Vn is the flow velocity data of the seawater, with the unit of millimeters per second, Zn is the turbidity data of the seawater, with the unit of millimeters per second, and n represents the number of detections.

[0084] It should be noted that in the embodiment of the present application, a is taken as 220 and b is taken as 2.3. In some other embodiments, according to the needs of the actual navigation environment, the values of a and b can be correspondingly adjusted, which will not be limited and elaborated here.

[0085] For example, please refer to Table 1. Table 1 shows the flow velocity data and turbidity data collected within one hour starting from 0 min.

[0086] Table 1:

[0087]

[0088] Among them, within one hour, Q = 2.3×(226 + 224 + 223 + 226 + 225 + 224 + 221 + 223 + 226 + 222) - 220×(2.3 + 2.1 + 2.1 + 2.2 + 2.2 + 2.3 + 2.3 + 2.1 + 2.2 + 2.4) = 246. In the embodiment of the present application, the descaling threshold e = 17500, and the fouling coefficient Q = 246, which does not reach the descaling threshold. The data processor does not control the two ultrasonic descaling devices to perform descaling operations on the tube bundle box. As the sailing time increases, when the descaling coefficient Q reaches (or exceeds) 17500, the data processor controls the two ultrasonic descaling devices to operate and automatically performs descaling operations on the tube bundle box.

[0089] It should be noted that in some other embodiments, according to the actual usage needs, the value of the descaling threshold can be adjusted, which will not be limited and elaborated here.

[0090] The implementation principle of a ship cooler and its control method in the embodiment of the present application is as follows: During the process of the ship moving along the route, the cooling medium is dispersed and flows into several cooling tube bundles through the first flange, and after being dispersed into multiple shunts by the several cooling tube bundles, it flows out through the second flange. During the process of the cooling medium flowing through the cooling tube bundles, seawater enters the tube bundle box through the water inlet holes and flows out of the tube bundle box through the water outlet holes. The flowing seawater absorbs the heat carried in the cooling medium and takes it out, achieving the technical effect of cooling the cooling medium. During the process of the ship moving on the route, the flow velocity monitoring unit monitors the flow velocity of the seawater flowing through the tube bundle box in real time and outputs the flow velocity data, and the turbidity monitoring unit monitors the turbidity of the seawater flowing through the tube bundle box in real time and outputs the turbidity data. After receiving the flow velocity data and the turbidity data, the data processor calculates the fouling coefficient Q in the tube bundle box. By comparing the fouling coefficient Q, a descaling control signal can be output when the fouling coefficient Q reaches the descaling threshold. When descaling is required, the data processing module controls the two ultrasonic descaling devices to operate. The ultrasonic descaling devices drive the vibration heads to vibrate at high frequency, which can drive the water body to scour the cooling tube bundles at high frequency. The scale attached to the outer wall of the cooling tube bundles falls off the tube wall after being vibrated and is discharged together with the flowing water body through the water outlet grille. By automatically performing descaling operations on the tube bundle box, the situation of scale blockage caused by scale adhering to the tube wall of the cooling tube bundles can be effectively reduced.

[0091] Embodiment 2

[0092] In this embodiment, there are three rows of water outlet grilles in total. Three flow guide plates are rotatably installed on the outer side wall of the tube bundle box, and the three flow guide plates are driven by a servo motor fixedly installed on the outer side wall of the tube bundle box.

[0093] Among them, a heat exchange control module for monitoring the heat exchange efficiency of the cooling tubes in the tube bundle box is fixedly installed on the tube bundle box. The heat exchange control module includes a specific heat capacity measuring instrument and a temperature measuring instrument installed on the outside of the tube bundle box. The specific heat capacity measuring instrument is used to monitor the specific heat capacity of seawater and output specific heat capacity data, and the temperature measuring instrument is used to monitor the temperature of seawater and output temperature data.

[0094] Combined with the data collector to collect the box body flow velocity data output by the single-chip microcomputer, based on the formula Calculate the total volume of water entering the tube bundle box per second. In the formula, Vk represents the seawater flow velocity in the tube bundle box when the ship is stationary, with the unit of millimeters per second; Vj represents the circulation velocity of seawater in the tube bundle box when the ship is running, with the unit of millimeters per second; Sy represents the total water outlet area of the waist-shaped water outlet holes on the water outlet grille of the tube bundle box, with the unit of square millimeters. Since the sizes of the water outlet holes on the water outlet grille are uniformly fixed and the quantity is known, the total water outlet area of the cooler can be calculated according to the known dimension data.

[0095] Based on the formula Calculate W. In the formula, W represents the heat that can be exchanged per second by the cooler, with the unit of joules; in the formula, η represents the heat exchange efficiency of the cooler, which is a known value; C represents the specific heat capacity of seawater, which is detected by the specific heat capacity measuring instrument.

[0096] A controller is sealed and installed in the tube bundle box. The signal input end of the controller is signal-connected to the signal output ends of the temperature measuring instrument, the specific heat capacity measuring instrument, and the single-chip microcomputer. The signal output end of the controller is signal-connected to the signal input end of the servo motor through a data cable.

[0097] During the process of the ship moving along the route, the controller controls the servo motor to change the angle of the spoiler in the tube bundle box according to the temperature and specific heat capacity of seawater and the set heat exchange efficiency, so as to keep the heat exchange efficiency of the heat exchanger stable and provide a stable and safe heat exchange effect for marine equipment.

[0098] The above are all the preferred embodiments of this application. It does not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application should be covered within the protection scope of this application.

Claims

1. A ship cooler, characterized in that: The invention comprises a tube bundle box (1), a mounting frame (2) is fixedly mounted on the tube bundle box (1), a tube sheet (3) is fixedly mounted on the mounting frame (2), a plurality of cooling tube bundles (4) for conveying cooling medium are mounted on the tube sheet (3), the cooling tube bundles (4) are all arranged in a U shape, and water passages for seawater circulation are formed between the plurality of cooling tube bundles (4), a valve cover (5) is fixedly mounted on the tube sheet (3), and a first flange (51) for cooling medium inflow and a second flange (52) for cooling medium outflow are mounted on the valve cover (5); A water inlet grille (11) and a water outlet grille (12) are provided on the box body of the tube bundle box (1); the water inlet grille (11) is provided at the bottom of the tube bundle box (1), and the water inlet grille (11) is located directly below the cooling tube bundle (4); the water outlet grille (12) is provided on the side wall of the tube bundle box (1), and the water outlet grille (12) is located on the side of the cooling tube bundle (4); A flow disturbance structure and a descaling device (6) are installed in the tube bundle box (1); The descaling device (6) comprises: a flow rate monitoring unit (61) installed in the tube bundle box (1) and used to monitor the flow rate of seawater in the tube bundle box (1); a turbidity monitoring unit (62) installed on the tube bundle box (1) and used to monitor the turbidity of the seawater flowing through the tube bundle box (1); a data processor connected to the signal input ends of the flow rate monitoring unit (61) and the turbidity monitoring unit (62) and used to calculate the fouling coefficient in the tube bundle box (1) based on the flow rate data and the water turbidity data, and to calculate the fouling coefficient when the fouling coefficient reaches outputting a descaling control signal when a descaling threshold is reached; an ultrasonic descaling module, fixedly mounted in the tube bundle box (1), signal-connected to a signal output terminal of the data processor, and used to receive the descaling control signal and operate; two groups of L-shaped mounting seats (13) are fixedly mounted on the outer wall of the tube bundle box (1), the two groups of L-shaped mounting seats (13) are respectively arranged on the upper and lower sides of the water outlet grille (12), turbines (14) are rotatably mounted on the two groups of L-shaped mounting seats (13), and the turbines (14) are each provided with a sensing bump (141); The flow rate monitoring unit (61) comprises: a plurality of ultrasonic distance measuring sensors (611) fixedly mounted on the outer side wall of the tube bundle box (1) and respectively opposite to the mounting parts of the plurality of turbines (14), and used for monitoring the distance to the front shielding surface and outputting a sensing distance signal; a plurality of comparators, respectively connected to the signal output ends of the plurality of ultrasonic distance measuring sensors (611), and used for receiving the sensing distance signal and outputting a high level signal when the sensing distance signal is less than a set distance; A single chip microcomputer is connected to the signal output terminals of the comparators and is used to receive the high level signal and calculate the flow rate of the seawater in the tube bundle box (1); the single chip microcomputer receives a plurality of high level signals, respectively calculates the occurrence frequencies of the plurality of high level signals and then takes an average value, calculates the average rotation speed of the turbine (14), and the rotation speed of the turbine (14) is positively correlated with the circulation speed of the seawater. The single chip microcomputer calculates the flow rate of the seawater in the tube bundle box (1) based on the average value of the occurrence frequencies of the high level signals; The ship cooler includes the following control steps: Step S1: collecting the tube bundle box monitoring data of the seawater flowing through the tube bundle box, wherein the tube bundle box monitoring data includes the flow rate data and turbidity data of the seawater; the step S1 includes the following steps: step S11: setting a flow rate monitoring unit in the tube bundle box, and collecting the flow rate data output by the flow rate monitoring unit at a time interval of 6 minutes; step S12: setting a turbidity monitoring unit in the tube bundle box, and collecting the turbidity data output by the turbidity monitoring unit at a time interval of 6 minutes; Step S2: Calculate the fouling coefficient Q in the tube bundle box based on the flow rate data and turbidity data through the data processor, obtain the flow rate data and turbidity data of the seawater in the tube bundle box, and use the formula Calculate Q; where a is the weight of the flow rate data, b is the weight of the turbidity data, Vn is the flow rate data of seawater, Zn is the turbidity data of seawater, and n refers to the number of detections; Step S3: setting a descaling threshold value e, comparing the scaling coefficient Q, and controlling the ultrasonic descaling module to run to perform the descaling operation when the scaling coefficient Q reaches the descaling threshold value.

2. A ship cooler according to claim 1, characterized in that: The turbidity monitoring unit (62) comprises a turbidity sensor, and the turbidity sensor is fixedly installed inside the box body of the tube bundle box (1).

3. A ship cooler according to claim 1, characterized in that: The ultrasonic descaling module comprises two ultrasonic descaling devices (63), the two ultrasonic descaling devices (63) being mounted on the top of the tube bundle box (1) via a connecting flange, the vibration heads of the two ultrasonic descaling devices (63) extending into the tube bundle box (1), and the vibration heads of the two ultrasonic descaling devices (63) being located on both sides of the cooling tube bundle (4).

4. A ship cooler according to claim 1, characterized in that: The invention also comprises a first bracket (41) and a second bracket (42); the first bracket (41) and the second bracket (42) are provided with a plurality of jacks (421) adapted to the tube bodies of the cooling tube bundles (4); the plurality of jacks (421) are evenly arranged in a linear array on the first bracket (41) and the second bracket (42); the first bracket (41) and the second bracket (42) are sleeved on the plurality of cooling tube bundles (4).

5. A ship cooler according to claim 1, characterized in that: The spoiler structure comprises a plurality of spoiler plates (15), and the plurality of spoiler plates (15) are fixedly mounted in the box body of the tube bundle box (1).

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