Cleaning method and pipe system for marine diesel engine air cooler

Abstract

According to the cleaning method for the air cooler of the marine diesel engine, the air cooler and a cleaning fluid inlet are arranged on a main engine of the marine diesel engine, the air cooler is provided with a cleaning fluid air cooler inlet and a cleaning fluid discharge port, and the cleaning fluid air cooler inlet is communicated with the cleaning fluid inlet through a pipeline; the air cooler cleaning system is characterized in that chemical cleaning liquid is directly input into a cleaning liquid inlet of a main machine from the outside through a cleaning pipe system, then enters an air cooler through a cleaning liquid air cooler inlet to clean the air cooler, and then flows back to the cleaning pipe system through a cleaning liquid discharge port, so that the cleaning effect of the air cooler and the utilization rate of the cleaning liquid are improved; the cleaning pipe system comprises a cleaning liquid circulating cabinet, a circulating pump, a liquid supply hose, a liquid return hose and a three-way valve, the cleaning liquid circulating cabinet is connected with the circulating pump, an inlet is connected with the cleaning liquid discharge port through the liquid return hose and the three-way valve, and an outlet of the circulating pump is connected with the cleaning liquid inlet of the host through the liquid supply hose. The air cooler cleaning device improves the utilization rate of chemical cleaning liquid and the cleaning effect of the air cooler, and has the advantages of being simple in structure and flexible to use.

Description

Technical Field

[0001] The invention relates to an air cooler of a marine diesel engine, in particular to a cleaning method and a pipe system for the air cooler of a marine diesel engine, belonging to the technical field of diesel engines. Background Art

[0002] The air cooler (ACU) of a marine diesel engine is a crucial component. Its function is to reduce the temperature of the compressed air, thereby increasing the air intake density, improving combustion efficiency and output efficiency, reducing the engine's heat load, and protecting and extending the life of the engine's moving parts. The cooling efficiency of the ACU directly impacts the engine's performance. However, since main engines equipped with iCERs require exhaust gas from the exhaust manifold to be rerouted back to the turbocharger, the exhaust gas must be returned to the scavenge air box for cleaning, making the ACU more susceptible to contamination. When dirt adheres to the ACU's surface, its cooling efficiency decreases, reducing engine performance. Therefore, cleaning the ACU is crucial to maintain engine performance.

[0003] At present, the cleaning of the air cooler is to add a cleaning tank 2 to the main unit, such as Figure 1 As shown, the cleaning liquid inlet 1 on the main engine inputs chemical cleaning liquid and compressed air from the shipyard side into the cleaning tank 2, and then the cleaning liquid is transported from the cleaning tank 2 to the cleaning liquid air cooler inlet 3 through a pipeline, and the chemical cleaning liquid is sprayed into the air cooler to clean the air cooler. The chemical cleaning liquid after cleaning is directly discharged through the pipeline below.

[0004] This method not only requires adding a cleaning tank to the main unit, but also directly discharges the used chemical cleaning liquid to the outside, resulting in a large amount of chemical cleaning liquid waste and low utilization rate. Summary of the Invention

[0005] The object of the present invention is to overcome the shortcomings of the prior art and provide a cleaning method and piping system for a marine diesel engine air cooler, eliminating the cleaning tank on the main engine and directly supplying chemical cleaning liquid from the shipyard side for cleaning the air cooler. At the same time, the cleaning liquid is recovered at the air cooler discharge port, thereby improving the use efficiency of the chemical cleaning liquid and reducing waste.

[0006] In order to achieve the above object, the present invention is achieved through the following technical solutions:

[0007] A method for cleaning an air cooler of a marine diesel engine, wherein the main engine of the marine diesel engine is provided with an air cooler and a cleaning liquid inlet, the air cooler is provided with a cleaning liquid air cooler inlet and a cleaning liquid discharge port, the cleaning liquid air cooler inlet being connected to the cleaning liquid inlet via a pipeline; the method is characterized in that a chemical cleaning liquid is directly input from the outside into the cleaning liquid inlet of the main engine via a cleaning piping system, then enters the air cooler via the cleaning liquid air cooler inlet, cleans the air cooler, and then flows back to the cleaning piping system via the cleaning liquid discharge port, thereby improving the cleaning effect of the air cooler and the utilization rate of the cleaning liquid.

[0008] Furthermore, the cleaning piping system includes a cleaning liquid circulation cabinet, a circulation pump, a liquid supply hose and a liquid return hose; the cleaning liquid circulation cabinet is used to store cleaning liquid added from the outside, and its inlet is detachably connected to the cleaning liquid discharge port of the air cooler through the liquid return hose, and its outlet is connected to the circulation pump, and the outlet of the circulation pump is detachably connected to the cleaning liquid inlet of the main engine through the liquid supply hose.

[0009] Furthermore, the cleaning piping system also includes a three-way valve for switching the cleaning liquid between discharge and reflux. The inlet of the three-way valve is connected to the cleaning liquid discharge port of the air cooler, one outlet is connected to the discharge pipe for discharging the cleaning liquid, and the other outlet is connected to the return liquid hose.

[0010] Furthermore, the cleaning liquid circulation cabinet is a movable structure, and the circulation pump and the liquid supply hose and liquid return hose disconnected from the main unit can be moved together with the cleaning liquid circulation cabinet.

[0011] Furthermore, the cleaning method comprises the following specific steps:

[0012] 1) Add cleaning liquid into the cleaning liquid circulation cabinet, and move the cleaning liquid circulation cabinet and circulation pump to the front of the host machine;

[0013] 2) Connect the outlet of the circulation pump to the cleaning liquid inlet of the main engine through the liquid supply hose, connect the three-way valve at the cleaning liquid discharge port of the air cooler to the inlet of the cleaning liquid circulation cabinet through the liquid return hose, and switch the three-way valve to connect to the cleaning liquid circulation cabinet;

[0014] 3) starting the circulation pump to input the cleaning liquid into the air cooler through the liquid supply hose, the cleaning liquid inlet, and the cleaning liquid air cooler inlet to clean the air cooler. The cleaning liquid after cleaning is returned to the cleaning liquid circulation cabinet through the cleaning liquid discharge port, the three-way valve, and the liquid return hose in sequence for recycling;

[0015] 4) After the air cooler is cleaned, turn off the circulation pump, switch the three-way valve to connect to the discharge pipe, remove the liquid supply hose and return hose from the main unit, and move them away together with the cleaning liquid circulation cabinet and circulation pump. The residual cleaning liquid in the air cooler is discharged to the outside through the three-way valve and discharge pipe.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] 1) Improved cleaning effect of air cooler - The flow rate of the chemical cleaning liquid in the cleaning pipe system of the present invention is increased, thereby enhancing the cleaning effect.

[0018] 2) Improved utilization of chemical cleaning fluid - A three-way valve is added to the air cooler discharge port, allowing the chemical cleaning fluid to flow back to the cleaning fluid circulation cabinet and then be pumped to clean the air cooler, thereby improving the use efficiency of the chemical cleaning fluid.

[0019] 3) The present invention eliminates the traditional practice of adding a cleaning tank to the main engine and utilizes a movable cleaning pipe system to directly supply the main engine with pumped chemical cleaning liquid from the shipyard side, resulting in a simpler structure and more flexible use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of a traditional air cooler cleaning system.

[0021] Figure 2 Schematic diagram of the piping system of the present invention.

[0022] Figure 3 It is a schematic diagram of the process of the present invention.

[0023] In the figure,

[0024] 1—Cleaning fluid inlet, 2—Cleaning tank, 3—Cleaning fluid air cooler inlet, 4—Three-way valve, 5—Cleaning fluid circulation cabinet, 6—Circulating pump, 7—Liquid supply hose, 8—Liquid return hose. DETAILED DESCRIPTION

[0025] The preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings in order to more clearly understand the structure and use of the present invention, but this does not limit the scope of protection of the present invention.

[0026] The present invention is used for cleaning marine diesel engine air coolers. Figure 1 The main engine of the marine diesel engine is provided with an air cooler and a cleaning fluid inlet 1. The air cooler is provided with a cleaning fluid air cooler inlet 3 and a cleaning fluid discharge port. The cleaning fluid air cooler inlet 3 is connected to the cleaning fluid inlet 1 through a pipeline.

[0027] The cleaning method for a marine diesel engine air cooler of the present invention directly inputs a chemical cleaning liquid from the outside into a cleaning liquid inlet 1 of a marine diesel engine main engine through a cleaning piping system. The chemical cleaning liquid then enters the air cooler through the cleaning liquid air cooler inlet 3 to clean the air cooler. The chemical cleaning liquid then flows back to the cleaning piping system through the cleaning liquid discharge port, thereby improving the cleaning effect of the air cooler and the utilization rate of the cleaning liquid.

[0028] Example

[0029] See also Figure 2 The cleaning piping system includes a cleaning liquid circulation cabinet 5, a circulation pump 6, a liquid supply hose 7, a three-way valve 4 and a liquid return hose 8.

[0030] The cleaning liquid circulation cabinet 5 is used to store the cleaning liquid added from the outside, and its inlet is detachably connected to the cleaning liquid discharge port of the air cooler through the liquid return hose 8. The outlet of the cleaning liquid circulation cabinet 5 is connected to the circulation pump 6, and the outlet of the circulation pump 6 is detachably connected to the cleaning liquid inlet 1 of the main machine through the liquid supply hose 7.

[0031] The cleaning liquid circulation cabinet 5 is a movable structure, and the circulation pump 6 and the liquid supply hose 7 and liquid return hose 8 disconnected from the main machine can be moved together with the cleaning liquid circulation cabinet 5.

[0032] The three-way valve 4 is used to switch the cleaning liquid between discharge and reflux, its inlet is connected to the cleaning liquid discharge port of the air cooler, one outlet is connected to the discharge pipe for discharging the cleaning liquid, and the other outlet is connected to the return liquid hose 8.

[0033] See also Figure 3 , the specific process steps of the present invention are as follows:

[0034] 1) Add cleaning liquid into the cleaning liquid circulation cabinet 5, and move the cleaning liquid circulation cabinet 5 and the circulation pump 6 to the front of the main machine;

[0035] 2) Connect the outlet of the circulation pump 6 to the cleaning liquid inlet 1 of the main engine through the liquid supply hose 7, connect the three-way valve 4 at the cleaning liquid discharge port of the air cooler to the inlet of the cleaning liquid circulation cabinet 5 through the liquid return hose 8, and switch the three-way valve 4 to connect to the cleaning liquid circulation cabinet 5;

[0036] 3) Starting the circulation pump 6 to feed the cleaning liquid into the air cooler through the liquid supply hose 7, the cleaning liquid inlet 1, and the cleaning liquid air cooler inlet 3 to clean the air cooler. The cleaning liquid after cleaning is returned to the cleaning liquid circulation cabinet 5 through the cleaning liquid discharge port, the three-way valve 4, and the liquid return hose 8 for recycling;

[0037] 4) After the air cooler is cleaned, turn off the circulation pump 6, switch the three-way valve 4 to connect to the discharge pipe, remove the liquid supply hose 7 and the liquid return hose 8 from the main unit, and remove them together with the cleaning liquid circulation cabinet 5 and the circulation pump 6. The residual cleaning liquid in the air cooler is discharged to the outside through the three-way valve 4 and the discharge pipe.

[0038] The above are only preferred embodiments of the present invention. It must be pointed out that all equivalent modifications, changes and amendments made by technicians in the relevant field based on the content of the application of the present invention should fall within the scope of protection of the patent of the present invention.

Claims

1. A method for cleaning an air cooler of a marine diesel engine, wherein the main engine of the marine diesel engine is provided with an air cooler and a cleaning fluid inlet, the air cooler being provided with a cleaning fluid air cooler inlet and a cleaning fluid discharge port, the cleaning fluid air cooler inlet being connected to the cleaning fluid inlet via a pipeline; characterized in that: The chemical cleaning liquid is directly input from the outside into the cleaning liquid inlet of the main engine through the cleaning pipe system, then enters the air cooler through the cleaning liquid air cooler inlet to clean the air cooler, and then flows back to the cleaning pipe system through the cleaning liquid discharge port to improve the cleaning effect of the air cooler and the utilization rate of the cleaning liquid.

2. The cleaning method for a marine diesel engine air cooler according to claim 1, characterized in that: The cleaning piping system includes a cleaning liquid circulation cabinet, a circulation pump, a liquid supply hose and a liquid return hose; the cleaning liquid circulation cabinet is used to store cleaning liquid added from the outside, and its inlet is detachably connected to the cleaning liquid discharge port of the air cooler through the liquid return hose, and its outlet is connected to the circulation pump, and the outlet of the circulation pump is detachably connected to the cleaning liquid inlet of the host through the liquid supply hose.

3. The cleaning method for a marine diesel engine air cooler according to claim 2, characterized in that: The cleaning piping system also includes a three-way valve for switching the cleaning liquid between discharge and reflux. The inlet of the three-way valve is connected to the cleaning liquid discharge port of the air cooler, one outlet is connected to the discharge pipe for discharging the cleaning liquid, and the other outlet is connected to the return liquid hose.

4. The cleaning method for a marine diesel engine air cooler according to claim 3, characterized in that: The cleaning liquid circulation cabinet is a movable structure, and the circulation pump and the liquid supply hose and liquid return hose disconnected from the main machine can be moved together with the cleaning liquid circulation cabinet.

5. The cleaning method for a marine diesel engine air cooler according to claim 4, characterized in that: The cleaning method comprises the following specific steps: 1) Add cleaning liquid into the cleaning liquid circulation cabinet, and move the cleaning liquid circulation cabinet and circulation pump to the front of the host machine; 2) Connect the outlet of the circulation pump to the cleaning liquid inlet of the main engine through the liquid supply hose, connect the three-way valve at the cleaning liquid discharge port of the air cooler to the inlet of the cleaning liquid circulation cabinet through the liquid return hose, and switch the three-way valve to connect to the cleaning liquid circulation cabinet; 3) starting the circulation pump to input the cleaning liquid into the air cooler through the liquid supply hose, the cleaning liquid inlet, and the cleaning liquid air cooler inlet to clean the air cooler. The cleaning liquid after cleaning is returned to the cleaning liquid circulation cabinet through the cleaning liquid discharge port, the three-way valve, and the liquid return hose in sequence for recycling; 4) After the air cooler is cleaned, turn off the circulation pump, switch the three-way valve to connect to the discharge pipe, remove the liquid supply hose and return hose from the main unit, and move them away together with the cleaning liquid circulation cabinet and circulation pump. The residual cleaning liquid in the air cooler is discharged to the outside through the three-way valve and discharge pipe.

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