A method for processing a coating on a diesel engine housing

Abstract

The application discloses a diesel engine shell coating processing method in the diesel engine processing technical field, and comprises the following steps: S1, opening the spraying box, placing the diesel engine shell above the processing platform, and making it inside the protective cover, then closing the spraying box; S2, the feeding assembly delivers the coating to the nozzle and sprays it, so that the coating is sprayed on the diesel engine shell, and the paint mist in the spraying box is extracted by the air extraction equipment; S3, after spraying is completed, the spraying box is opened, and the diesel engine shell is taken off from the processing platform; in the application, the protective cover is covered above the processing platform to protect the diesel engine shell above the processing platform, so that the gas cannot directly blow to the diesel engine shell when the air extraction equipment extracts the air, the probability of the coating being skewed in the spraying process is reduced, the coating can be accurately sprayed on the diesel engine shell, and therefore, the quality of the diesel engine shell coating processing is ensured, and the service life of the diesel engine shell is prolonged.

Description

Technical Field

[0001] This invention relates to the field of diesel engine processing technology, specifically to a method for processing a coating on a diesel engine housing. Background Technology

[0002] During the production and processing of diesel engines, the engine casing needs to be treated with anti-corrosion measures. Generally, a coating is sprayed on the outside of the casing to form a protective layer. To prevent the paint mist generated during the spraying process from directly escaping into the outside air, the spraying process is usually carried out inside the casing. Furthermore, an air extraction device is used to extract the paint mist generated during the spraying process. For example, such an environmentally friendly injection molding part spraying device is disclosed in the publication document CN117463544A.

[0003] However, the device has certain limitations in use. For example, when the air extraction device extracts the paint mist inside the box, outside air will continuously enter the box through the air inlet (to balance the air pressure inside the box), causing a circulating gas inside the box. This airflow will blow towards the spraying equipment, which can easily cause the paint sprayed by the spraying equipment to be skewed, making it impossible to accurately spray the paint onto the casing and affecting the quality of the casing coating. Summary of the Invention

[0004] The purpose of this invention is to provide a method for processing a coating on a diesel engine housing, in order to solve the problem mentioned in the background art that the airflow blows towards the spraying equipment, which easily causes the paint sprayed by the spraying equipment to be skewed, making it impossible for the paint to be accurately sprayed onto the housing, thus affecting the processing quality of the housing coating.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for processing a coating on a diesel engine housing, implemented by a spraying device, the spraying device comprising: a spraying box, a feeding assembly on the spraying box, an air extraction device connected to the side wall of the spraying box, an air inlet pipe connected to the top of the spraying box, a processing platform for supporting the diesel engine housing and a protective cover for covering the processing platform inside the spraying box, and a nozzle inside the spraying box that is located inside the protective cover and connected by the feeding assembly;

[0006] The method for processing the coating of the diesel engine housing includes the following steps:

[0007] S1: Open the spray booth, place the diesel engine housing on top of the processing platform, and ensure it is inside the protective cover before closing the spray booth;

[0008] S2: The feeding assembly delivers the paint to the nozzle and sprays it out, so that the paint is sprayed onto the diesel engine casing. At the same time, the exhaust equipment works to extract the paint mist inside the spray box.

[0009] S3: After the spraying is completed, open the spraying box and remove the diesel engine housing from the processing platform.

[0010] Preferably, the spray box is provided with a telescopic component, the movable end of which extends into the interior of the spray box and connects to the protective cover to drive the protective cover to rise and fall.

[0011] Preferably, the inner sidewall of the protective cover is provided with mounting parts on all four sides, and there are several nozzles, which are respectively mounted on the four mounting parts. The feeding assembly is connected to the several nozzles through connecting pipes.

[0012] Preferably, the connection between the protective cover and the mounting component is provided with a horizontally extending groove, and the mounting component is provided with a slider for sliding within the groove.

[0013] Preferably, the outer wall of the protective cover is equipped with a kit on all four sides. A rotating rod is rotatably mounted inside the kit. The end of the rotating rod is equipped with a fan blade. A drive wheel is fitted on the outer wall of the rotating rod. The protective cover is equipped with several driven wheels, each corresponding to one of the four drive wheels. The drive wheels and driven wheels are driven by a transmission belt. The protective cover is equipped with several drive components, each corresponding to one of the driven wheels. When airflow passes through the kit, the fan blade drives the rotating rod and drive wheels to rotate. The transmission belt synchronizes this rotation, causing the driven wheels to rotate and drive the drive components to work, thus moving the slider within the slide groove.

[0014] Preferably, the drive assembly includes a telescopic assembly and an impeller, wherein the output shaft of the impeller is connected to the output shaft of the driven wheel by a coupling, so that the impeller rotates to drive the telescopic assembly to extend and retract, and the moving end of the telescopic assembly is connected to the slider by a connector.

[0015] Preferably, the telescopic assembly includes a mounting sleeve, within which a piston is slidably mounted. The piston divides the inner cavity of the mounting sleeve into a first cavity and a second cavity that are isolated from each other. The piston is equipped with a moving rod for connecting to a connector. Both the first and second cavities have inlets and outlets. The inlets of the first and second cavities are connected to the outlet of the impeller via pipes, and the outlets of the first and second cavities are connected to the inlet of the impeller via pipes. The impeller is filled with liquid. Both the inlet and outlet are equipped with solenoid valves. Pressure sensors are installed at both ends of the slider. The protective cover is equipped with a controller for receiving pressure sensor information and controlling the opening and closing of the solenoid valves. When the driven wheel rotates, the impeller rotates along with it, squeezing the liquid inside through the pipes and inlets into the first or second cavity, causing the piston to slide inside the mounting sleeve, thereby moving the moving rod, the connector, and the slider.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: By covering the processing platform with a protective cover, the diesel engine housing above the processing platform is protected, so that the gas will not be blown directly onto the diesel engine housing when the exhaust equipment is exhausting, reducing the probability of skewing during the coating spraying process, and allowing the coating to be accurately sprayed onto the diesel engine housing, thereby ensuring the quality of the diesel engine housing coating processing and extending the service life of the diesel engine housing. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the spraying equipment of the present invention;

[0018] Figure 2 This is a schematic cross-sectional view of the protective cover of the present invention;

[0019] Figure 3 This is a schematic diagram of the connection structure between the protective cover and the kit of the present invention;

[0020] Figure 4 This is an enlarged schematic diagram of the structure at point A in this invention;

[0021] Figure 5 This is a cross-sectional view of the connection between the telescopic component and the impeller of the present invention.

[0022] In the diagram: 1. Spraying box; 2. Feeding assembly; 3. Processing platform; 4. Air inlet pipe; 5. Air extraction equipment; 6. Telescopic component; 7. Protective cover; 8. Mounting component; 9. Kit; 10. Connecting pipe; 11. Spray nozzle; 12. Slide rail; 13. Rotating rod; 14. Fan blade; 15. Sliding block; 16. Driving wheel; 17. Driven wheel; 18. Conveyor belt; 19. Impeller; 20. Telescopic assembly; 201. Mounting sleeve; 202. Piston; 203. Inlet; 204. Moving rod; 205. Outlet; 21. Connecting component; 22. Pressure sensor. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] Please see Figure 1A method for processing a coating on a diesel engine housing, wherein a spraying device is used in the process to spray paint onto the diesel engine housing, forming a coating on the outer side of the housing to protect it. The spraying device includes: a spraying box 1, which is equipped with a feeding assembly 2 (the feeding assembly 2 includes a storage tank and a pump installed inside the storage tank; the storage tank contains paint, which is the raw material used in the spraying process); and an exhaust device 5 (exhaust fan) is connected to the side wall of the spraying box 1, the exhaust fan's outlet being connected to a purification device, which includes a filter screen, activated carbon, and... Other filtration facilities are used to filter the extracted gas to ensure the quality of the emissions. The top of the spray box 1 is connected to an air inlet pipe 4. A filter screen is installed inside the air inlet pipe 4 (the filter screen is detachably installed inside the air inlet pipe 4 so that it can be replaced regularly. The filter screen filters the gas passing through the air inlet pipe 4). A processing platform 3 is installed at the bottom of the inner cavity of the spray box 1. A protective cover 7 is installed inside the spray box 1. The protective cover 7 is located directly above the processing platform 3. The bottom of the protective cover 7 is open. A spray nozzle 11 is installed inside the spray box 1. The spray nozzle 11 is located inside the protective cover 7 and is connected to the pump of the feeding assembly 2.

[0026] It should be noted that the spraying box 1 consists of two parts: the box body and the box door (the box door is not shown in the figure). The box door and the box body are hinged. During the spraying process, the box door is closed, and after the spraying is completed, the box door is opened.

[0027] The processing method for coating the engine casing of a diesel engine, including the following steps:

[0028] First, open the spray box 1, place the diesel engine casing above the processing platform 3 and inside the protective cover 7, then close the spray box 1.

[0029] Second, after the feeding component 2 delivers the paint to the nozzle 11, the paint is sprayed out from the nozzle 11 and applied to the diesel engine housing to produce a coating. At the same time, the air extraction device 5 works to extract the paint mist inside the spray box 1. During this process, external gas enters the interior of the spray box 1 through the air inlet pipe 4 to balance the air pressure inside the spray box 1.

[0030] Third, after the spraying is completed, open the spraying box 1 and remove the diesel engine casing from the processing platform 3.

[0031] It should be noted that when external gas enters the spray box 1 through the air intake pipe 4, the protective cover 7 covers the processing platform 3, which prevents the gas from blowing directly onto the diesel engine casing. This reduces the probability of the airflow changing the direction of the paint spraying, so that the paint can be accurately sprayed onto the diesel engine casing, ensuring the processing quality of the diesel engine casing coating.

[0032] In this embodiment, as a further optimization, please refer to... Figure 1 The top of the spray box 1 is equipped with a telescopic component 6 (the telescopic component 6 refers to an electric telescopic rod, or other telescopic devices such as hydraulic or pneumatic telescopic rods). The moving end of the telescopic component 6 extends into the interior of the spray box 1 and connects to the protective cover 7. By extending and retracting the telescopic component 6, the protective cover 7 is driven to rise and fall. When the diesel engine housing is placed on the processing platform 3 for spraying, the telescopic component 6 moves down with the protective cover 7 to cover the diesel engine housing, so that the flowing gas will not blow directly onto the diesel engine housing. After the spraying is completed, the telescopic component 6 moves up with the protective cover 7 to remove the diesel engine housing from the interior of the protective cover 7.

[0033] In this embodiment, as a further optimization, please refer to... Figure 1 , Figure 2 , Figure 3 and Figure 4 The protective cover 7 has four mounting parts 8 on all four sides of its inner wall (the four mounting parts 8 are distributed around the inner wall of the protective cover 7). There are several nozzles 11, which are respectively mounted on the four mounting parts 8. The feeding assembly 2 is connected to several nozzles 11 through connecting pipes 10 (the pump of the feeding assembly 2 is connected to several nozzles 11 through connecting pipes 10, where the connecting pipes 10 are flexible hoses). The connection between the protective cover 7 and the mounting parts 8 is provided with a sliding groove 12, which extends horizontally. The mounting parts 8 are provided with sliders 15, which slide inside the sliding groove 12. By moving the sliders 15 inside the sliding groove 12, the mounting parts 8, carrying the nozzles 11, move horizontally inside the protective cover 7 to spray the four sides of the diesel engine casing.

[0034] It should be noted that when the upper and lower sides of the diesel engine housing also need to be painted, the angle of the diesel engine housing can be adjusted after the four sides of the diesel engine housing have been painted.

[0035] Example 2

[0036] As a further optimization of Example 1, please refer to Figure 1 , Figure 2 , Figure 3 and Figure 4The protective cover 7 is provided with four kits 9 on all four sides of its outer wall (the four kits 9 are installed on the four sides of the outer wall of the protective cover 7 respectively). A rotating rod 13 is rotatably provided inside the kit 9 ​​(the rotating rod 13 is set vertically). The top of the rotating rod 13 is provided with a fan blade 14. A drive wheel 16 is fitted on the outer wall of the rotating rod 13. There are four driven wheels 17 inside the protective cover 7. The four driven wheels 17 correspond one-to-one with the four drive wheels 16. The drive wheels 16 and the driven wheels 17 are driven by a transmission belt 18. There are four drive components on the protective cover 7. The four drive components correspond one-to-one with the four driven wheels 17. The drive components are driven by the driven wheels 17 to move the slider 15 in the slide groove 12.

[0037] Please refer to Figure 3 , Figure 4 and Figure 5 The drive assembly includes a telescopic assembly 20 and an impeller 19. The output shaft of the impeller 19 is connected to the output shaft of the driven wheel 17 via a coupling (the output shafts of the impeller 19 and the driven wheel 17 are coaxial). The telescopic assembly 20 includes a mounting sleeve 201. A piston 202 is slidably disposed within the mounting sleeve 201. The piston 202 divides the inner cavity of the mounting sleeve 201 into a first cavity and a second cavity that are isolated from each other. A moving rod 204 is disposed on the piston 202. One end of the moving rod 204 away from the piston 202 extends to the outside of the mounting sleeve 201 and is connected to a connecting member 21. The end of the connecting member 21 away from the moving rod 204 is connected to a slider 15. Both the first and second chambers are equipped with inlets 203 and outlets 205. The inlets 203 of the first and second chambers are connected to the outlets of the impeller 19 through pipes, and the outlets 205 of the first and second chambers are connected to the inlets of the impeller 19 through pipes. The impeller 19 is filled with liquid (such as water). Both inlets 203 and outlets 205 are equipped with solenoid valves. Both ends of the slider 15 are equipped with pressure sensors 22 (the pressure sensors 22 can be miniature pressure sensors LFC-10). The protective cover 7 is equipped with a controller (central processing unit) to receive information from the pressure sensors 22 and to control the opening and closing of the solenoid valves.

[0038] It should be noted that during the extraction process of the extraction device 5, external gas enters the interior of the spray box 1 through the air inlet pipe 4. After being blocked and guided by the protective cover 7, the gas passes around the outer perimeter of the protective cover 7, then passes through the bottom of the protective cover 7, and is finally extracted by the extraction device 5. As the gas passes around the protective cover 7, it passes through the kit 9, causing the fan blade 14 to rotate, which in turn rotates the rotating rod 13. During the rotation of the rotating rod 13, the driving wheel 16 rotates along with it, and through the transmission belt 18, it causes the driven wheel 17 to rotate as well, thereby driving the impeller 19. Rotation forces the liquid inside the impeller 19 through the pipe and inlet 203 into the first or second chamber, causing the piston 202 to slide inside the mounting sleeve 201. This allows the moving rod 204 to move the connecting piece 21 and the slider 15, thereby moving the mounting piece 8 and the nozzle 11 horizontally. By using airflow to drive the nozzle 11, the diesel engine casing is sprayed, achieving a cost-saving effect (no special drive equipment is needed to move the nozzle 11) and also saving energy. At the end where the slider 15 moves near the slide groove 12... When the slider 15 contacts the inner wall of the groove 12, the pressure sensor 22 at that end will be squeezed. After the controller detects that the pressure sensor 22 is squeezed, it controls the inlet 203 of the first cavity to close and the outlet 205 to open, and opens the inlet 203 of the second cavity and closes the outlet 205, or controls the inlet 203 of the second cavity to close and the outlet 205 to open, and opens the inlet 203 of the first cavity and closes the outlet 205 (the above process of controlling the opening and closing of the inlet and outlet is achieved by the controller controlling the opening and closing of the solenoid valve). The impeller 19 compresses the liquid into the second or first chamber, controls the telescopic assembly 20 to extend and retract, and causes the connecting piece 21 to move the slider 15 in the opposite direction (relative to the above-mentioned direction of movement) until the pressure sensor 22 at the other end of the slider 15 contacts the inner wall of the slide groove 12. The controller then controls the solenoid valve again to change the extension and retraction direction of the telescopic assembly 20, so that the slider 15 can reciprocate inside the slide groove 12 without stopping, allowing the coating to be fully sprayed onto the diesel engine housing, ensuring the processing quality of the diesel engine housing coating.

[0039] It should also be noted that a mounting bracket is installed inside the kit 9, the rotating rod 13 is rotatably mounted on the mounting bracket, and a ratchet gear (the teeth of the gear are inclined in one direction) is fixedly fitted on the outer wall of the rotating rod 13. A limit block is hinged on the mounting bracket, and a spring is provided between the limit block and the mounting bracket. The limit block is located between adjacent teeth of the ratchet gear, so that the rotating rod 13 can only rotate in one direction.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A method for processing a coating on a diesel engine housing, implemented using a spraying device, characterized in that: The spraying equipment includes: a spraying box (1), a feeding assembly (2) on the spraying box (1), an air extraction device (5) connected to the side wall of the spraying box (1), an air inlet pipe (4) connected to the top of the spraying box (1), a processing platform (3) for supporting the diesel engine housing and a protective cover (7) for covering the processing platform (3) inside the spraying box (1), and a nozzle (11) inside the spraying box (1) that is inside the protective cover (7) and connected by the feeding assembly (2). The method for processing the coating of the diesel engine housing includes the following steps: S1: Open the spray box (1), place the diesel engine housing above the processing platform (3) and make it inside the protective cover (7), then close the spray box (1); S2: The feeding assembly (2) delivers the paint to the nozzle (11) and sprays it out, so that the paint is sprayed on the diesel engine casing. At the same time, the vacuum equipment (5) works to extract the paint mist inside the spray box (1). S3: After the spraying is completed, open the spraying box (1) and remove the diesel engine housing from the processing platform (3); The protective cover (7) has mounting parts (8) on all four sides of its inner wall. There are several nozzles (11), and several nozzles (11) are respectively mounted on the four mounting parts (8). The feeding assembly (2) is connected to several nozzles (11) through connecting pipes (10). The connection between the protective cover (7) and the mounting part (8) is provided with a horizontally extending groove (12), and the mounting part (8) is provided with a slider (15) for sliding in the groove (12). The outer side wall of the protective cover (7) is provided with a kit (9) around it. A rotating rod (13) is rotatably provided inside the kit (9). A fan blade (14) is provided at the end of the rotating rod (13). A drive wheel (16) is sleeved on the outer wall of the rotating rod (13). The protective cover (7) is provided with a number of driven wheels (17) that correspond one-to-one with the four drive wheels (16). The drive wheels (16) and driven wheels (17) are driven by a transmission belt (18). The protective cover (7) is provided with a number of drive components that correspond one-to-one with the number of driven wheels (17). When the airflow passes through the kit (9), the fan blade (14) rotates with the rotating rod (13) and the drive wheel (16). The transmission belt (18) synchronizes the rotation of the driven wheels (17) to drive the drive components to work, so as to move the slider (15) in the groove (12).

2. The method for processing a coating on a diesel engine housing according to claim 1, characterized in that: The spray box (1) is provided with a telescopic component (6), the movable end of which extends into the interior of the spray box (1) and is connected to the protective cover (7) to drive the protective cover (7) to rise and fall.

3. The method for processing a coating on a diesel engine housing according to claim 1, characterized in that: The drive assembly includes a telescopic assembly (20) and an impeller (19). The output shaft of the impeller (19) is connected to the output shaft of the driven wheel (17) by a coupling, so that the impeller (19) rotates to drive the telescopic assembly (20) to extend and retract. The moving end of the telescopic assembly (20) is connected to the slider (15) by a connector (21).

4. The method for processing a coating on a diesel engine housing according to claim 3, characterized in that: The telescopic assembly (20) includes a mounting sleeve (201), and a piston (202) is slidably disposed inside the mounting sleeve (201). The piston (202) divides the inner cavity of the mounting sleeve (201) into a first cavity and a second cavity that are isolated from each other. The piston (202) is provided with a moving rod (204) for connecting to the connector (21). Both the first cavity and the second cavity are provided with an inlet (203) and an outlet (205). The inlets (203) of the first cavity and the second cavity are connected to the outlet of the impeller (19) through pipes, and the outlets (205) of the first cavity and the second cavity are connected to the inlet of the impeller (19) through pipes. The impeller (19) is filled with liquid. Solenoid valves are provided on both the inlet (203) and the outlet (205). Pressure sensors (22) are provided at both ends of the slider (15). A controller for receiving information from the pressure sensors (22) and controlling the opening and closing of the solenoid valves is provided on the protective cover (7). When the driven wheel (17) rotates, the impeller (19) rotates together, and the liquid inside itself is squeezed into the first or second cavity through the pipe and the inlet (203), so that the piston (202) slides inside the mounting sleeve (201), so that the moving rod (204) moves with the connecting piece (21) and the slider (15).

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