Automatic coating system for heat exchanger tube bundle

Abstract

The utility model relates to an automatic coating system for a heat exchanger tube bundle, which belongs to the technical field of anticorrosion coating of the inner wall of the heat exchanger tube bundle and comprises a coating platform and a PLC (programmable logic controller), the coating platform is an inclined platform with an inclination angle of 15 degrees, and an identification system, a mechanical arm system and an electromagnetic valve which are connected with the PLC are mounted on the coating platform. The electromagnetic valve is used for controlling starting and stopping of the coating gun, the recognition system comprises a machine vision system used for collecting a feeding pipe opening and an intelligent vision system used for detecting discharging of a discharging pipe opening, the mechanical arm system is used for moving the coating gun, and coating work is completed by combining the recognition system, the mechanical arm system and the electromagnetic valve through the inclination angle of the coating platform. The mechanical arm system drives the coating gun to be inserted into the feeding pipe opening, the problems of gun running and paint leakage are effectively avoided, meanwhile, labor is saved, one person can complete anti-corrosion coating operation, potential safety hazards are avoided, the labor intensity of workers is reduced, and the production efficiency is improved while the production quality is guaranteed.

Description

Technical Field

[0001] The utility model relates to an automatic coating system for a heat exchanger tube bundle, belonging to the technical field of anti-corrosion coating of the inner wall of a heat exchanger tube bundle. Background Art

[0002] The tube bundle heat exchanger is a typical heat exchange device that allows two fluids with different temperatures to exchange heat. It is composed of many slender tubes and realizes the cooling or heating of substances through heat exchange. Because metal has good thermal conductivity and corrosion resistance, it is usually made of metal. Tube bundle heat exchangers are widely used in chemical, petroleum, pharmaceutical, energy and other industrial sectors.

[0003] There are many types and models of heat exchanger tube bundles. Although the lengths are different, they have their own rules in diameter and structure. The minimum diameter is 300mm, and one model is added for every 100mm increase. The common models have diameters of 400-2500mm. The overall structure is a cylinder, and the operating surface is a sealing surface with smooth ends and flange connection.

[0004] Regardless of the diameter, the heat exchanger tube bundle is composed of multiple seamless carbon steel pipes with small diameters (for example, 19mm\25mm) arranged in a certain pattern. In the existing anti-corrosion coating construction process of the inner wall of the heat exchanger tube bundle, three people are required to cooperate, one person opens the valve, and two people paint the workpiece. Six tubes are painted each time. For example, a large equipment with a diameter of 2000mm requires three people to repeat the painting action hundreds or thousands of times. In addition, there are uncontrollable factors in the coating process, such as environmental protection and safety. There are hidden dangers, and the labor intensity of workers is high. The quality is greatly affected by people, and it is easy to leak paint. Therefore, it is very important to develop an automatic coating system for heat exchanger tube bundles. Utility Model Content

[0005] The utility model aims at the deficiencies existing in the above-mentioned prior art and provides an automatic coating system for a heat exchanger tube bundle.

[0006] The technical solution of the utility model to solve the above technical problems is as follows:

[0007] An automated coating system for a heat exchanger tube bundle comprises a coating platform and a PLC controller. The coating platform is an inclined platform with an inclination angle of 15°. An identification system, a robotic arm system and an electromagnetic valve connected to the PLC controller are installed on the coating platform. The electromagnetic valve is used to control the start and stop of a coating gun. The identification system comprises a machine vision system for collecting information from an inlet pipe and an intelligent vision system for detecting material discharge from an outlet pipe. The robotic arm system is used to move the coating gun.

[0008] Furthermore, the feed pipe opening is located at the top of the inclined platform, the discharge pipe opening is located at the bottom of the inclined platform, a paint recovery tank is provided at the bottom of the inclined platform, and a circulation system connected to the coating gun is provided on the paint recovery tank.

[0009] Furthermore, the circulation system is connected to the coating gun through a paint delivery pipe.

[0010] Furthermore, the circulation system includes a diaphragm pump and a fine filter which are sequentially connected to the paint recovery tank.

[0011] Furthermore, the diaphragm pump is provided with an air compressor.

[0012] Furthermore, the air compressor is provided with an air delivery pipe connected to the diaphragm pump.

[0013] Furthermore, the machine vision system is a camera, and the intelligent vision system is infrared detection.

[0014] Furthermore, the robotic arm system includes a robotic arm connected to the painting gun, the robotic arm is a three-axis robotic arm, one end of the robotic arm is slidably connected to one side of the painting platform, and the other end is connected to the painting gun.

[0015] Furthermore, the coating gun includes a robot arm connection end connected to the robot arm system, one end of the robot arm connection end is provided with a gun muzzle, and the other end is provided with a hose.

[0016] Compared with the prior art, the beneficial effects of the utility model are: the utility model has a simple structure, is easy to operate and maintain, and the inclination angle of the coating platform is combined with the recognition system, the robotic arm system and the electromagnetic valve to complete the coating work. The robotic arm system drives the coating gun to insert into the feed pipe mouth to effectively avoid the problems of gun running and paint leakage, while saving labor. One person controls the electromagnetic valve to start and stop repeatedly through the PLC controller to quickly and effectively complete the anti-corrosion coating operation, avoiding safety hazards, reducing the labor intensity of workers, reducing production costs, ensuring production quality and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the utility model.

[0018] Figure 2 It is a schematic diagram of the structure of the coating gun of the utility model.

[0019] Figure 3 This is the structural control principle diagram of the utility model.

[0020] In the figure, 1. coating platform; 2. paint recovery tank; 3. diaphragm pump; 4. fine filter; 5. paint delivery pipe; 6. robotic arm; 7. coating gun; 8. solenoid valve; 9. camera; 10. PLC controller; 11. air compressor; 12. infrared detection; 13. air delivery pipe; 71. gun muzzle; 72. robotic arm connection end; 73. hose. DETAILED DESCRIPTION

[0021] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0022] like Figure 1-Figure 3 As shown, an automatic coating system for heat exchanger tube bundles includes a coating platform 1 and a PLC controller 10. The coating platform 1 is an inclined platform with an inclination angle of 15°. The coating platform 1 is equipped with an identification system, a mechanical arm system and an electromagnetic valve 8 connected to the PLC controller 10. The electromagnetic valve 8 is used to control the start and stop of the coating gun 7. The identification system includes a machine vision system for collecting the material inlet and an intelligent vision system for detecting the material out of the material outlet. The mechanical arm system is used to move the coating gun 7. The inclination angle of the coating platform 1 can effectively avoid missing coating.

[0023] The feed pipe opening is located at the top of the inclined platform, and the discharge pipe opening is located at the bottom of the inclined platform. A paint recovery tank 2 is provided at the bottom of the inclined platform, and a circulation system connected to the coating gun 7 is provided on the paint recovery tank 2.

[0024] The circulation system is connected to the coating gun 7 through the paint delivery pipe 5 .

[0025] The circulation system includes a diaphragm pump 3 and a fine filter 4 which are sequentially connected to the paint recovery tank 2 .

[0026] The diaphragm pump 3 is provided with an air compressor 11. The air compressor 11 provides power for the diaphragm pump 3 and is used to transport paint. When the working conditions do not require continued transportation, the air compressor 11 stops working when the pressure reaches the upper limit. The diaphragm pump 3 is a paint transport device, equipped with a working pressure gauge. When there is no demand for paint transportation, the internal pressure reaches the pressure setting value, and the diaphragm pump 3 stops working. When there is a demand for paint transportation, the internal pressure drops to a stable delivery pressure, and the diaphragm pump 3 resumes working.

[0027] The air compressor 11 is provided with an air delivery pipe 13 which is in communication with the diaphragm pump 3 .

[0028] The machine vision system is a camera 9 , and the intelligent vision system is an infrared detection 12 .

[0029] The robot system includes a robot 6 connected to a coating gun 7. The robot 6 is a three-axis robot. One end of the robot 6 is slidably connected to one side of the coating platform 1, and the other end is connected to the coating gun 7. The robot 6 moves the coating gun 7 to a specified position by moving in multiple directions according to program instructions.

[0030] The coating gun 7 comprises a robot arm connecting end 72 connected to the robot arm system, one end of the robot arm connecting end 72 is provided with a gun muzzle 71, and the other end is provided with a hose 73.

[0031] Working principle:

[0032] During painting, the crane hoists the tube bundle heat exchanger to the painting platform 1, and the machine vision system transmits the sealing surface photo to the PLC controller 10 to identify the corresponding workpiece program. After the operator confirms, the operation program starts. The mechanical arm 6 is connected to the painting gun 7, and the machine vision system of the feed pipe mouth identifies and locates, and cooperates to insert the painting gun 7 into the feed pipe mouth. After the insertion action is completed, the PLC controller 10 starts the electromagnetic valve 8, and detects whether there is paint flowing out of the discharge pipe mouth through the intelligent vision system. After the flow out, the signal is transmitted to the PLC controller 10 to close the electromagnetic valve 8, and the painting work is completed. The paint is injected into the feed pipe mouth of the high-end sealing surface of the heat exchanger tube bundle by the painting gun 7, and flows out of the discharge pipe mouth of the low-end sealing surface, and then collected in the paint recovery tank 2 for recycling. The air compressor 11 provides power for the diaphragm pump 3, and the diaphragm pump 3 transports the paint to the fine filter 4. After the fine filter 4 filters out impurities in the paint, the filtered paint is transported to the painting gun 7. The machine vision system transmits the single-tube arrangement photo of the sealing surface to the PLC controller 10 to find the program of the sealing surface of the corresponding workpiece specification. According to the program, the robot arm 6 is operated to insert the muzzle 71 of the coating gun 7 into the feed pipe opening of the workpiece sealing surface. The paint is transported to the muzzle 71 through the hose 73. After the insertion action is completed, the PLC controller 10 starts the electromagnetic valve 8 and detects whether there is paint flowing out of the discharge pipe opening through the intelligent vision system. The signal after the paint flows out is transmitted back to the PLC controller 10, and the PLC controller 10 closes the electromagnetic valve 8 to complete the coating operation. The coating operation requires the PLC controller 10 to repeatedly complete the insertion of the muzzle 71 of the coating gun 7 into the feed pipe opening of the workpiece sealing surface. This action completes the coating of the entire workpiece.

[0033] The present application has a simple structure, is easy to operate and maintain. The inclination angle of the coating platform 1 is combined with the recognition system, the robotic arm system and the electromagnetic valve 8 to complete the coating work. The robotic arm system drives the coating gun 7 to insert into the feed pipe mouth to effectively avoid the problems of gun running and paint leakage, while saving labor. One person controls the electromagnetic valve 8 through the PLC controller 10 to repeatedly start and stop, which can quickly and effectively complete the anti-corrosion coating operation, avoid safety hazards, reduce the labor intensity of workers, reduce production costs, ensure production quality and improve production efficiency.

[0034] In this case, all electrical components and their adapted power supplies are connected to the PLC controller 10 through wires, and a suitable PLC controller 10 is selected according to the actual situation to meet the control requirements. The control and connection means between the electrical appliances are well-known technologies in the field of PLC technology, and the electrical control is not described here.

[0035] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic coating system for a heat exchanger tube bundle, comprising a coating platform (1) and a PLC controller (10), characterized in that: The coating platform (1) is an inclined platform with an inclination angle of 15°. An identification system, a mechanical arm system and an electromagnetic valve (8) connected to a PLC controller (10) are installed on the coating platform (1). The electromagnetic valve (8) is used to control the start and stop of the coating gun (7). The identification system includes a machine vision system for collecting information from an inlet pipe and an intelligent vision system for detecting material discharge from an outlet pipe. The mechanical arm system is used to move the coating gun (7).

2. The heat exchanger tube bundle automatic coating system according to claim 1 is characterized in that: The feed pipe opening is located at the top end of the inclined platform, and the discharge pipe opening is located at the bottom end of the inclined platform. A paint recovery tank (2) is provided at the bottom end of the inclined platform, and a circulation system connected to a coating gun (7) is provided on the paint recovery tank (2).

3. The heat exchanger tube bundle automatic coating system according to claim 2 is characterized in that: The circulation system is connected to the coating gun (7) via a coating delivery pipe (5).

4. The heat exchanger tube bundle automatic coating system according to claim 2 is characterized in that: The circulation system comprises a diaphragm pump (3) and a fine filter (4) which are sequentially connected to the paint recovery tank (2).

5. The heat exchanger tube bundle automatic coating system according to claim 4 is characterized in that: The diaphragm pump (3) is provided with an air compressor (11).

6. The heat exchanger tube bundle automatic coating system according to claim 5, characterized in that: The air compressor (11) is provided with an air delivery pipe (13) which is in communication with the diaphragm pump (3).

7. The heat exchanger tube bundle automatic coating system according to claim 1, characterized in that: The machine vision system is a camera (9), and the intelligent vision system is infrared detection (12).

8. The heat exchanger tube bundle automatic coating system according to claim 1, characterized in that: The robotic arm system comprises a robotic arm (6) connected to a coating gun (7), and adopts a three-axis robotic arm; one end of the robotic arm (6) is slidably connected to one side of a coating platform (1), and the other end is connected to the coating gun (7).

9. The heat exchanger tube bundle automatic coating system according to claim 1, characterized in that: The coating gun (7) comprises a robot arm connection end (72) connected to the robot arm system, one end of the robot arm connection end (72) is provided with a gun muzzle (71), and the other end is provided with a hose (73).

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