Wet spraying device of marine engine air cooler

Abstract

The invention discloses a wetting and spraying device of a marine engine air cooler, which comprises a wetting and spraying water tank, a wetting and spraying water pump, a wetting and spraying valve group and a wetting and spraying control box, the wetting and spraying water tank is used for storing and supplying spraying water, circulating water is introduced into the water tank through a three-way valve to serve as a main water source, and the wetting and spraying water pump is connected with the wetting and spraying valve group. Fresh water is supplemented through the water injection valve only when necessary, so that the lowest use liquid level of the water tank is kept; the wetting and spraying water pump supplies water to the wetting and spraying valve group; the wetting and spraying valve group comprises a plurality of spraying valves, the wetting and spraying valve group is controlled by the wetting and spraying control box to perform spraying operation on the air cooler according to a set cycle period and flow, and comprehensive cleaning of the air cooler is ensured; the wetting and spraying control box indicates opening and closing of the three-way valve and the water injection valve, issues a starting or stopping instruction to the wetting and spraying water pump, and controls the action time of each spraying valve in the wetting and spraying valve set and whether the spraying valves are used or not.

Description

Technical Field

[0001] The present invention relates to the technical field of marine engines, in particular to a wetting spray device for a marine engine air cooler, which aims to solve the problem of carbon deposition and adhesion of pollutants such as oil stains inside the air cooler in an exhaust gas recirculation system, and improve the operating efficiency and performance of the engine. Background Art

[0002] For marine engines with exhaust gas recirculation systems, the scavenging air cooler pipes may be contaminated and blocked by oil, grease, salt, dust and other air pollutants. Especially during the operation of the intelligent exhaust gas recirculation system, the recirculated exhaust gas is an important source of pollution. In order to solve this problem, a device is urgently needed to remove this pollution and blockage.

[0003] Although the prior art such as CN116772649A provides an automatic cleaning system, it has the problems of poor flexibility and limited cleaning effect. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a wetting spray device for a marine engine air cooler. The device can be installed on a marine engine currently using an intelligently controlled exhaust gas recirculation system. When the exhaust gas recirculation system is running, water mist is sprayed to the air cooler at an automatically set flow rate and cycle, effectively reducing the adhesion and blockage of carbon deposits and oil stains inside the air cooler, and having a certain cooling function, which improves combustion stability to a certain extent and improves engine performance. In addition, the wetting spray device for an engine air cooler of the present invention has the advantages of being easy to use and easy to operate.

[0005] The technical solution of the present invention is as follows:

[0006] A wetting spray device for a marine engine air cooler comprises a wetting spray water tank, a wetting spray water pump, a wetting spray valve group and a wetting spray control box, wherein:

[0007] The wetting spray water tank is used to store and supply water for spraying. The water tank introduces circulating water as the main water source through a three-way valve to save water resources. Fresh water is added only when necessary through a water injection valve to maintain the minimum use liquid level in the water tank.

[0008] The wetting spray water pump is started when receiving the engine operation command and the liquid level of the wetting spray water tank is not lower than the minimum use liquid level, and supplies water to the wetting spray valve group;

[0009] The wet spray valve group includes a plurality of spray valves. Under the control of the wet spray control box, the wet spray valve group sprays the air cooler at a set cycle and flow rate to ensure comprehensive cleaning of the air cooler.

[0010] The wetting spray control box collects and instructs the opening and closing of the three-way valve and the water injection valve according to the liquid level information of the wetting spray water tank; the wetting spray control box issues a start or stop command to the wetting spray water pump, and controls the action time of each spray valve in the wetting spray valve group and whether it is used.

[0011] Furthermore, the water level of the wetting spray water tank is controlled by a three-way valve and a water injection valve, and a liquid level switch is used to monitor water level changes to ensure the stability of the water level in the water tank; when the liquid level in the water tank is lower than the minimum use liquid level, the water injection valve automatically opens to inject fresh fresh water; when the liquid level is higher than a set first liquid level value, the water injection valve is closed; when the liquid level is lower than the first liquid level value, the three-way valve is opened to introduce circulating water; when the liquid level is higher than a set second liquid level value, the three-way valve is closed; wherein the second liquid level value is greater than the first liquid level value, and the first liquid level value is greater than the minimum use liquid level.

[0012] Furthermore, the wetting spray water pump stops running when one of the following conditions is met: the wetting spray water pump fails, receives a stop command from the engine, the liquid level in the wetting spray water tank is lower than a set alarm level, and the alarm level is lower than a minimum usage level.

[0013] Furthermore, the wet spray valve group includes at least four spray valves, and the opening and closing time and opening delay of each spray valve can be set independently to meet the spraying needs of engines with different power, ensuring that the spraying surface is uniform and the spraying amount is adjustable.

[0014] Furthermore, the wetting spray control box includes a programmable controller and a signal acquisition module. The signal acquisition module collects signals from various sensors and processes them through a programmable logic controller to achieve automatic control and logical judgment of the wetting spray device, thereby ensuring that the wetting spray device operates stably according to the preset automatic control logic.

[0015] Furthermore, the wetting spray control box collects the engine's operating instructions and the liquid level of the wetting spray water tank monitored by the liquid level switch. When the information feedback from the liquid level switch shows that the liquid level in the water tank is higher than the minimum usage level, the wetting spray control box instructs the wetting spray water pump to start; conversely, when the wetting spray control box collects the engine's stop instruction, or the information feedback from the liquid level switch shows that the liquid level in the water tank is lower than the alarm level, or a wetting spray water pump failure is detected, the wetting spray control box instructs the wetting spray water pump to stop running.

[0016] Furthermore, the design of the wet spray control box provides a user-friendly interface, allowing the user to easily switch between automatic / manual modes and monitor and adjust various parameters in real time to ensure efficient operation and flexibility of the wet spray device.

[0017] Working principle: When the exhaust gas recirculation system is running, the wet spray device is automatically turned on. The device is equipped with different numbers of wet spray valve groups according to different models. Under the control of the wet spray control box, the valve group sprays at a certain cycle and flow rate to achieve the purpose of reducing or even removing exhaust gas pollutants.

[0018] The device of the present invention adopts a flexible mode of sequential control and selective control of multiple spray valves to meet the requirements of different projects for different spray volumes. For example, by setting the spray and interval time of each valve and selective use, multiple valves can be sprayed at the same time, or each valve can be sprayed separately in sequence. This method maximizes the avoidance of water waste while achieving the cleaning effect.

[0019] By means of the structure in the above technical solution, the present invention has the following advantages:

[0020] (1) The present invention solves the problem that there was no effective way to remove carbon deposits and oil stains inside the air cooler of the exhaust gas recirculation engine. The periodic quantitative wetting spraying of the device of the present invention can effectively solve this problem, improve the combustion stability of the engine, and improve the engine performance.

[0021] (2) The present invention has the advantages of instant response, fast action rate, good reliability, simple operation and convenient use.

[0022] (3) The present invention adopts a flexible mode of sequential control and selective control of multiple spray valves to meet the personalized needs of different projects for spraying volume, while maximally avoiding water resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the engine air cooler wetting spray device of the present invention.

[0024] Figure 2 yes Figure 1 Schematic diagram of the wetting water supply to the wetting spray water tank PW02 in the wetting spray device.

[0025] Figure 3 yes Figure 1 Schematic diagram of a specific spray valve setting of the wetting spray valve group PW03 in the wetting spray device.

[0026] Figure 4 It is a specific control logic diagram of the spray valve in the wetting spray valve group PW03 of the present invention. DETAILED DESCRIPTION

[0027] The following is a further detailed description of the wet spray device for the engine air cooler of the present invention in conjunction with the accompanying drawings and specific examples, but this shall not limit the protection scope of the present invention.

[0028] like Figure 1-4 The wet spray device of the engine air cooler consists of the following four main parts: wet spray water tank PW02, wet spray water pump PW01, wet spray valve group PW03, and wet spray control box PW04.

[0029] (1) Wetting spray water tank PW02: Figure 2 The water level of the water tank is controlled by the three-way valve PVW21 and the water injection valve PVW22, and is monitored by four liquid level switches LS / HH, LS / H, LS / L, and LS / LL. The main control logic is as follows: When the liquid level in the water tank is lower than L, the water injection valve PVW22 is opened, and when it is higher than H, PVW22 is closed. When the liquid level in the water tank is lower than H, the three-way valve PVW21 is opened, and when it is higher than HH, PVW21 is closed. Because the three-way valve of the present invention introduces the circulating water used in water treatment, it can be recycled again. The water injection valve uses fresh water and only guarantees the minimum use level of the water tank. The three-way valve controls the injection of circulating water; the water injection valve controls the injection of fresh fresh water. Fresh water on ships is precious, and the water injection method of the present invention can greatly save water. As a typical method, the three-way valve PVW21 and the water injection valve PVW22 can both be pneumatically operated, using compressed air as a power source. The wetting spray control box PW04 collects and indicates the opening and closing of the three-way valve PVW21 and the water injection valve PVW22 based on the monitoring information of the liquid level switch.

[0030] (2) Wetting spray water pump PW01: Figure 2 The starting conditions of the wetting spray water pump PW01 are as follows: receiving the engine's operating command, and the liquid level in the water tank is higher than the minimum use liquid level (L liquid level). The wetting spray water pump PW01 stops when one of the following conditions is met: the water pump PW01 fails, receiving the engine's stop command, and the water tank's liquid level is lower than the alarm level (LL liquid level). The wetting spray control box PW04 collects the engine's operating command and the liquid level of the wetting spray water tank PW02 monitored by the liquid level switch. When the information feedback from the liquid level switch shows that the water tank's liquid level is higher than the L liquid level, the wetting spray control box PW04 instructs the wetting spray water pump PW01 to start. Conversely, when the wetting spray control box PW04 receives the engine's stop command, or the information feedback from the liquid level switch shows that the water tank's liquid level is lower than the minimum use liquid level, or a water pump PW01 failure is detected, the wetting spray control box PW04 instructs the wetting spray water pump PW01 to stop running.

[0031] (3) Wetting spray valve group PW03: Figure 3A set of valve groups is equipped with four spray valves: PVW01, PVW02, PVW03, and PVW04. Different numbers of valve groups can be configured according to different projects. The action time of the spray valve and whether it is used can be set. For example, different numbers of spray valves can be used for diesel engines of different powers, and different spray times can be set. The four valves can match the diesel engine with the maximum power currently using this device.

[0032] At the same time, the spraying surface is more uniform, and the 4 valves can adjust the spraying amount more flexibly.

[0033] The control logic of valve group PW03 is as follows: Figure 4 In order to meet different flow and switch sequence requirements, the control of the sprinkler valve should be processed with open delay, open time and close time. The above parameters can be set separately to achieve independent control of the sprinkler valve. Among them, ON delay T is the waiting time for the first start, ON time T is the opening time of each valve, and OFF Time T is the closing time of each valve.

[0034] The action time and whether to use each spray valve in the wetting spray valve group PW03 are controlled by the wetting spray control box PW04.

[0035] (4) Wetting spray control box PW04: The main equipment included is a programmable controller, a signal acquisition module, a relay, etc. The control box PW04 uses the signal acquisition module and a programmable logic controller to realize data processing and logic control so that the wetting spray device of the engine air cooler can operate according to the automatic control logic (1)-(3) above.

[0036] In summary, the device of the present invention solves the problem that there was no effective way to reduce and remove carbon deposits and oil stains inside the air cooler of the exhaust gas recirculation engine. This device can periodically and quantitatively wet and spray to efficiently solve this problem, improve engine combustion stability, and improve engine performance.

[0037] The above is a best embodiment of the present invention, and it is not intended to limit the protection scope of the present invention. The protection scope of the present invention also includes other obvious changes and substitutions for those skilled in the art.

Claims

1. A wetting spray device for a marine engine air cooler, characterized in that: It includes a wetting spray water tank, a wetting spray water pump, a wetting spray valve group and a wetting spray control box, wherein: The wetting spray water tank is used to store and supply water for spraying. The water tank introduces circulating water as the main water source through a three-way valve to save water resources. Fresh water is added only when necessary through a water injection valve to maintain the minimum use liquid level in the water tank. The wetting spray water pump is started when receiving the engine operation command and the liquid level of the wetting spray water tank is not lower than the minimum use liquid level, and supplies water to the wetting spray valve group; The wet spray valve group includes a plurality of spray valves. Under the control of the wet spray control box, the wet spray valve group sprays the air cooler at a set cycle and flow rate to ensure comprehensive cleaning of the air cooler. The wetting spray control box collects and instructs the opening and closing of the three-way valve and the water injection valve according to the liquid level information of the wetting spray water tank; the wetting spray control box issues a start or stop command to the wetting spray water pump, and controls the action time of each spray valve in the wetting spray valve group and whether it is used.

2. The device according to claim 1, characterized in that The water level of the wetting spray water tank is controlled by a three-way valve and a water injection valve, and a liquid level switch is used to monitor the water level change to ensure the stability of the water level in the water tank; when the liquid level in the water tank is lower than the lowest use liquid level, the water injection valve automatically opens to inject fresh fresh water; when the liquid level is higher than a set first liquid level value, the water injection valve is closed; when the liquid level is lower than the first liquid level value, the three-way valve is opened to introduce circulating water; when the liquid level is higher than a set second liquid level value, the three-way valve is closed; wherein the second liquid level value is greater than the first liquid level value, and the first liquid level value is greater than the lowest use liquid level.

3. The device according to claim 1, characterized in that The wetting spray water pump stops running when one of the following conditions is met: the wetting spray water pump fails, the engine stop command is received, the liquid level of the wetting spray water tank is lower than the set alarm liquid level, and the alarm liquid level is lower than the minimum usage liquid level.

4. The device according to claim 1, characterized in that The moistening spray valve group includes at least four spray valves, and the opening and closing time and opening delay of each spray valve can be set independently to meet the spraying needs of engines with different powers, ensuring that the spraying surface is uniform and the spraying amount is adjustable.

5. The device according to claim 1, characterized in that The wetting spray control box includes a programmable controller and a signal acquisition module. The signal acquisition module collects the signals of each sensor and processes them through the programmable logic controller to realize automatic control and logical judgment of the wetting spray device, thereby ensuring that the wetting spray device operates stably according to the preset automatic control logic.

6. The device according to claim 2, characterized in that The wetting spray control box collects the engine's operating instructions and the liquid level of the wetting spray water tank monitored by the liquid level switch. When the information feedback from the liquid level switch shows that the liquid level in the water tank is higher than the minimum usage level, the wetting spray control box instructs the wetting spray water pump to start; conversely, when the wetting spray control box collects the engine's stop instruction, or the information feedback from the liquid level switch shows that the liquid level in the water tank is lower than the alarm level, or a wetting spray water pump failure is detected, the wetting spray control box instructs the wetting spray water pump to stop running.

7. The device according to claim 1, characterized in that The design of the wet spray control box provides a user-friendly interface, allowing the user to easily switch between automatic / manual modes and monitor and adjust various parameters in real time to ensure efficient operation and flexibility of the wet spray device.

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