Layered cooling device

Abstract

The utility model belongs to the technical field of ship equipment, and particularly relates to a layered cooling device. A layered cooling device comprises a cooling medium distribution system which is connected with a graded heat exchange subsystem, the graded heat exchange subsystem is communicated with a liquid storage structure, and a control unit is arranged on the cooling medium distribution system; the temperature sensor is installed on a main pipeline of the cooling medium distribution system and monitors the temperature of cooling liquid in real time. The temperature sensor transmits temperature data to the PLC; the PLC controls the flow divider valve and distributes the flow of the cooling liquid to different channels of the graded heat exchange subsystem, heat exchange pipelines can be adjusted in a self-adaptive mode for heat exchange, and the heat exchange efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the ship equipment technical field, specifically, the utility model relates to a layered cooling device. BACKGROUND

[0002] In the actual navigation process of the ship, the working condition is complex and changeable, especially in transoceanic navigation, severe sea state response, and ship acceleration, full load transportation and other scenes. The engine is in a high temperature or high load state for a long time. The disadvantages of the traditional single circulation cooling structure are more and more prominent. Insufficient heat dissipation not only causes the working temperature of the engine to be continuously too high, seriously affects the thermal efficiency of the engine, significantly increases the fuel consumption, greatly increases the operating cost, and more likely causes the deformation of the key components of the engine, aggravates the wear and tear, greatly shortens the service life of the equipment, and even causes serious safety accidents, threatening the safety of ship navigation. Because the flow of the cooling liquid cannot be dynamically adjusted according to the real-time temperature of the engine, a large amount of cooling liquid still circulates at a fixed flow under low load conditions, which not only consumes unnecessary pumping energy, but also increases the wear and tear and maintenance cost of the equipment. The internal flow channel of the existing heat exchanger is simply designed, the contact time of the cooling liquid and the heat dissipation medium is short, and the fullness of heat transfer is greatly limited.

[0003] Chinese patent (publication number: 210618438U) discloses a ship cooling water system water inlet device, which comprises a cooling seawater pipeline, a self-flowing pipeline and a rotating pipeline. One end of the self-flowing pipeline is a self-flowing water inlet, the other end is connected with the rotating pipeline, and the rotating pipeline is rotationally connected with the cooling seawater pipeline. The rotating pipeline drives the self-flowing pipeline to rotate, so that the self-flowing water inlet is rotated from one side of the ship bottom shell to the other side of the ship bottom shell to form self-flowing water inlet. The cooling water system water inlet device has low cooling efficiency and cannot fully dissipate heat. UTILITY MODEL CONTENTS

[0004] The utility model is carried out in order to solve the above problem, the purpose lies in providing a kind of cooling device that structure is compact, can be self-adaptive adjustment and heat exchange efficiency is high. In order to realize the above purpose, the technical scheme that the utility model adopts is as follows: a layered cooling device, comprising: cooling medium distribution system, the cooling medium distribution system is connected with hierarchical heat exchange subsystem, the hierarchical heat exchange subsystem is communicated with liquid storage structure, and control unit is arranged on the cooling medium distribution system.

[0005] The cooling medium distribution system includes a main pipeline, one end of the main pipeline is communicated with an engine high-temperature cooling liquid outlet, the other end of the main pipeline is connected with a flow divider, and the flow divider is connected with a hierarchical heat exchange subsystem.

[0006] The hierarchical heat exchange subsystem comprises a first channel, a second channel, a first return channel and a second return channel, the first channel and the second channel are communicated with a flow dividing valve, the first channel is communicated with a high-temperature layer cooling area, the first return channel is communicated with the high-temperature layer cooling area, one end of the first return channel is communicated with a main engine, the second channel is communicated with a low-temperature layer cooling area, the second return channel is communicated with the low-temperature layer cooling area, and one end of the second return channel is communicated with a liquid storage structure.

[0007] The high-temperature layer cooling area and the low-temperature layer cooling area are stacked one above another, and a heat-conducting partition plate is arranged between the high-temperature layer cooling area and the low-temperature layer cooling area.

[0008] An S-shaped baffle is arranged in the low-temperature layer cooling area, and the S-shaped baffle is a titanium alloy integrally formed structure.

[0009] A spiral flow channel is arranged in the high-temperature layer cooling area, and the spiral flow channel is a copper-aluminum alloy integrally formed structure.

[0010] The control unit comprises a temperature sensor and a PLC controller, the temperature sensor is arranged on the main pipeline, the temperature sensor is connected with the PLC controller, and the PLC controller is connected with the flow dividing valve.

[0011] The liquid storage structure comprises a recovery pump, the recovery pump inlet is communicated with the second return channel, the recovery pump outlet is connected with a third pipeline, and the third pipeline is connected with a liquid storage tank.

[0012] An Al2O3-SiO2 nano ceramic coating is sprayed on the surface of the heat-conducting partition plate.

[0013] The temperature sensor continuously monitors the temperature of the cooling liquid in the main pipeline, once the temperature changes, the temperature sensor immediately converts the temperature data into an electric signal, and transmits the electric signal to the PLC controller through a signal line.

[0014] The cooling liquid entering the high-temperature layer cooling area is heat-exchanged in the high-temperature layer cooling area, and then flows back to the main engine.

[0015] The cooling liquid entering the low-temperature layer cooling area is cooled in the low-temperature layer cooling area, and the recovery pump provides power for the backflow of the cooling liquid, so that the cooling liquid can continuously and stably flow back to the liquid storage tank through the second backflow channel and the third pipeline. BRIEF DESCRIPTION OF DRAWINGS

[0016] The present specification includes the following drawings, and the contents shown are as follows:

[0017] Figure 1 is a schematic view of a layered cooling device.

[0018] In the figure, the marks are: 1, cooling medium distribution system; 101, main pipeline, 102, shunt valve; 2, staged heat exchange subsystem; 201, first channel; 202, second channel; 203, first backflow channel; 204, second backflow channel; 205, high-temperature layer cooling area; 206, low-temperature layer cooling area; 3, liquid storage structure; 301, recovery pump; 302, third pipeline; 303, liquid storage tank; 4, control unit; 401, temperature sensor; 402, PLC controller. DETAILED DESCRIPTION

[0019] The specific embodiments of the present application will be further described below by comparing the drawings and describing the embodiments, the purpose being to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present application, and to help them to implement it.

[0020] As Figure 1 shown, a layered cooling device comprises: a cooling medium distribution system 1, the cooling medium distribution system 1 is connected to a staged heat exchange subsystem 2, the staged heat exchange subsystem 2 is communicated with a liquid storage structure 3, and the cooling medium distribution system 1 is provided with a control unit 4. The cooling medium distribution system 1 transports cooling liquid into the staged heat exchange subsystem 2, the cooling liquid is fully cooled in the staged heat exchange subsystem 2, the control unit 4 can transport the cooling liquid to a high-temperature layer cooling area 205 and a low-temperature layer cooling area 206 according to the temperature of the cooling liquid, realize full heat exchange with seawater, and finally the cooling liquid in the low-temperature layer cooling area 206 is transported into the liquid storage structure 3 and stored.

[0021] The cooling medium distribution system 1 comprises a main pipe 101, one end of the main pipe 101 is communicated with the turbine high-temperature cooling liquid outlet, the other end of the main pipe 101 is connected with a flow divider 102, and the flow divider 102 is connected with a staged heat exchange subsystem 2. The one end of the main pipe 101 is in close communication with the turbine high-temperature cooling liquid outlet, so that the cooling liquid flowing out of the turbine high-temperature part can smoothly enter the cooling device; the other end is stably connected with the flow divider 102, and the cooling liquid is transported to the flow divider 102. The flow divider 102 is connected with the staged heat exchange subsystem 2, and a path for the cooling liquid to enter different heat exchange regions is provided. The flow divider 102 accurately distributes the cooling liquid to different channels of the staged heat exchange subsystem 2 according to different proportions, so that the cooling demand under different working conditions is accurately matched. When the turbine operates to generate high-temperature cooling liquid, the cooling liquid quickly flows to the flow divider 102 through the main pipe 101. The flow divider 102 adjusts the opening degree according to this, and distributes the cooling liquid flow to different channels of the staged heat exchange subsystem 2.

[0022] The staged heat exchange subsystem 2 comprises a first channel 201, a second channel 202, a first return channel 203 and a second return channel 204. The first channel 201 and the second channel 202 are communicated with the flow divider 102. The first channel 201 is communicated with a high-temperature layer cooling area 205. The first return channel 203 is communicated with the high-temperature layer cooling area 205, and one end of the first return channel 203 is communicated with a main engine. The second channel 202 is communicated with a low-temperature layer cooling area 206. The second return channel 204 is communicated with the low-temperature layer cooling area 206, and one end of the second return channel 204 is communicated with a liquid storage structure 3. The first channel 201 and the second channel 202 are connected with the flow divider 102, and receive the cooling liquid distributed by the flow divider 102. The high-temperature cooling liquid passes through the first channel 201 to the high-temperature layer cooling area 205, so that the cooling liquid enters the high-temperature layer cooling area 205 for heat exchange. One end of the first return channel 203 is communicated with the high-temperature layer cooling area 205, and the other end is communicated with the main engine. The cooling liquid after heat exchange in the high-temperature layer cooling area 205 is returned to the main engine. The low-temperature cooling liquid passes through the second channel 202 to the low-temperature layer cooling area 206, and transports the cooling liquid to the low-temperature layer cooling area 206. The cooling liquid is cooled in the low-temperature layer cooling area 206. One end of the second return channel 204 is connected with the low-temperature layer cooling area 206, and the other end is connected with the inlet of a recovery pump 301 in the liquid storage structure 3. The recovery pump 301 transports the cooling liquid after low-temperature layer cooling to the liquid storage structure 3.

[0023] The high-temperature layer cooling area 205 and the low-temperature layer cooling area 206 are stacked one above the other, and a heat-conducting partition plate is arranged between the high-temperature layer cooling area 205 and the low-temperature layer cooling area 206. The heat-conducting partition plate is closely arranged between the high-temperature layer cooling area 205 and the low-temperature layer cooling area 206, and separates the high-temperature layer cooling area 205 and the low-temperature layer cooling area 206.

[0024] The low-temperature layer cooling area 206 is provided with S-shaped baffles which are integrally formed of titanium alloy. The cooling liquid forms turbulent flow between the S-shaped baffles, the titanium alloy is resistant to corrosion and suitable for seawater cooling medium, the distance between the baffles is 15 mm, and the contact time of the cooling liquid with seawater is increased.

[0025] The high-temperature layer cooling area 205 is provided with a spiral flow channel which is integrally formed of copper-aluminum alloy. The spiral flow channel can prolong the residence time to 2-3 times of that of a conventional straight pipe, and the copper-aluminum alloy can quickly dissipate heat by transferring heat from the high-temperature layer cooling area 205 to the low-temperature layer cooling area 206 through the heat-conducting partition.

[0026] The control unit 4 comprises a temperature sensor 401 and a PLC controller 402. The temperature sensor 401 is arranged on the main pipeline 101 and connected to the PLC controller 402, and the PLC controller 402 is connected to the shunt valve 102. The temperature sensor 401 is installed on the main pipeline 101 of the cooling medium distribution system 1 and monitors the temperature of the cooling liquid in real time. The temperature sensor 401 is connected to the PLC controller 402 through a signal line and transmits temperature data to the PLC controller 402. The PLC controller 402 has an algorithm built-in and can predictively adjust the valve opening according to the temperature change rate (dT / dt). The PLC controller 402 is connected to the shunt valve 102 through a control line and controls the shunt valve 102. The temperature sensor 401 continuously monitors the temperature of the cooling liquid in the main pipeline 101. Once the temperature changes, the temperature sensor 401 immediately converts the temperature data into an electrical signal and transmits it to the PLC controller 402 through a signal line. The PLC controller 402 analyzes and processes the received data. When it is determined that the engine is in a low-load state (temperature T≤75℃), the PLC controller 402 sends a command to the shunt valve 102 to make the shunt valve guide 80% of the cooling liquid to the second passage 202 corresponding to the low-temperature layer cooling area 206 and only 20% to the first passage 201 corresponding to the high-temperature layer cooling area 205.

[0027] When it is in a medium-load state (75℃<T≤100℃), the shunt valve is instructed to distribute the flow in a ratio of 5:5, 50% of the flow enters the first passage 201 corresponding to the high-temperature layer cooling area 205, and 50% enters the second passage 202 corresponding to the low-temperature layer cooling area 206.

[0028] When it is in a high-load state (T>100℃), the shunt valve is controlled to make 70% of the flow enter the first passage 201 corresponding to the high-temperature layer cooling area 205 and 30% enter the second passage 202 corresponding to the low-temperature layer cooling area 206.

[0029] The liquid storage structure 3 comprises a recovery pump 301, the inlet of the recovery pump 301 is communicated with the second return channel 204, the outlet of the recovery pump 301 is connected with a third pipeline 302, and the third pipeline 302 is connected with a liquid storage tank 303. The recovery pump 301 provides power for the return flow of the cooling liquid, so that the cooling liquid can continuously and stably return from the low-temperature layer cooling area 206 to the liquid storage tank 303 through the second return channel 204 and the third pipeline 302. The liquid storage tank 303 is used for storing the cooled cooling liquid, providing a cooling liquid reserve for the whole cooling system, and ensuring that the system can continuously and stably operate. The liquid storage tank 303 is provided with a spiral pre-cooling pipe, which is in contact with the outer wall of the first return channel 203 to realize pre-cooling.

[0030] The surface of the heat-conducting partition plate is sprayed with an Al2O3-SiO2 nano ceramic coating. The Al2O3-SiO2 nano ceramic coating sprayed on the surface of the heat-conducting partition plate not only improves the comprehensive thermal conductivity of the heat-conducting partition plate, but also effectively prevents the corrosion of corrosive media such as seawater on the partition plate, thereby prolonging the service life of the device.

[0031] Effects of the embodiment

[0032] The temperature sensor 401 continuously monitors the temperature of the cooling liquid in the main pipeline 101. Once the temperature changes, the temperature sensor 401 immediately converts the temperature data into an electrical signal and transmits it to the PLC controller 402 through the signal line. The PLC controller 402 analyzes and processes the received data. When it is determined that the engine is in a low-load state (temperature T≤75℃), the PLC controller 402 sends a command to the flow divider valve 102, so that the flow divider valve directs 80% of the cooling liquid to the second channel 202 corresponding to the low-temperature layer cooling area 206, and only 20% enters the first channel 201 corresponding to the high-temperature layer cooling area 205. When it is in a medium-load state (75℃<T≤100℃), the command flow divider valve distributes the flow in a ratio of 5:5. When it is in a high-load state (T>100℃), the control flow divider valve makes 70% of the flow enter the first channel 201 corresponding to the high-temperature layer cooling area 205, and 30% enter the second channel 202 corresponding to the low-temperature layer cooling area 206.

[0033] The cooling liquid entering the high-temperature layer cooling area 205 exchanges heat in the high-temperature layer cooling area 205 and returns to the main engine.

[0034] The cooling liquid entering the low-temperature layer cooling area 206 is cooled in the low-temperature layer cooling area 206. The recovery pump 301 provides power for the return flow of the cooling liquid, so that the cooling liquid can continuously and stably return from the low-temperature layer cooling area 206 to the liquid storage tank 303 through the second return channel 204 and the third pipeline 302.

[0035] The utility model has been described exemplarily above in combination with the drawings. Apparently, the utility model is not limited by the above-mentioned mode in the specific implementation. As long as various non-essential improvements are made by adopting the method concept and technical scheme of the utility model; or the above-mentioned concept and technical scheme of the utility model are directly applied to other occasions without improvement, all are within the protection scope of the utility model.

Claims

1. A layered cooling device, characterized in that, The application relates to a cooling medium distribution system (1) connected with a staged heat exchange subsystem (2) which is communicated with a liquid storage structure (3), wherein a control unit (4) is arranged on the cooling medium distribution system (1). The cooling medium distribution system (1) comprises a main pipeline (101) with a turbine high-temperature cooling liquid outlet communicated with one end of the main pipeline (101), and a shunt valve (102) connected with the other end of the main pipeline (101), wherein the shunt valve (102) is connected with the staged heat exchange subsystem (2).

2. The layered cooling device of claim 1, wherein: The staged heat exchange subsystem (2) comprises a first channel (201), a second channel (202), a first return channel (203) and a second return channel (204), wherein the first channel (201) and the second channel (202) are communicated with the shunt valve (102), the first channel (201) is communicated with a high-temperature layer cooling area (205), the first return channel (203) is communicated with the high-temperature layer cooling area (205), one end of the first return channel (203) is communicated with a main engine, the second channel (202) is communicated with a low-temperature layer cooling area (206), the second return channel (204) is communicated with the low-temperature layer cooling area (206), and one end of the second return channel (204) is communicated with the liquid storage structure (3).

3. The layered cooling device of claim 1, wherein: The high-temperature layer cooling area (205) and the low-temperature layer cooling area (206) are arranged in a stacked mode, and a heat-conducting partition plate is arranged between the high-temperature layer cooling area (205) and the low-temperature layer cooling area (206).

4. The layered cooling device of claim 3, wherein: An S-shaped baffle is arranged in the low-temperature layer cooling area (206), and the S-shaped baffle is a titanium alloy integrated structure.

5. The layered cooling device of claim 3, wherein: A spiral flow channel is arranged in the high-temperature layer cooling area (205), and the spiral flow channel is a copper-aluminum alloy integrated structure.

6. The layered cooling device of claim 3, wherein: The control unit (4) comprises a temperature sensor (401) and a PLC controller (402), the temperature sensor (401) is arranged on the main pipeline (101), the temperature sensor (401) is connected with the PLC controller (402), and the PLC controller (402) is connected with the shunt valve (102).

7. The layered cooling device of claim 2, wherein: The liquid storage structure (3) comprises a recovery pump (301), the inlet of the recovery pump (301) is communicated with the second return channel (204), the outlet of the recovery pump (301) is connected with a third pipeline (302), and the third pipeline (302) is connected with a liquid storage tank (303).

8. The layered cooling device of claim 1, wherein: An Al2O3-SiO2 nano ceramic coating is sprayed on the surface of the heat-conducting partition plate.

9. The layered cooling device of claim 4, wherein: ​

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