A rust preventive water vapor sand blaster

Abstract

The utility model discloses a kind of rust preventive water vapor sand blasting machine, it is related to sand blasting equipment technical field, including sand blasting pipe, further including rust preventive pressure tank, clean water storage tank, sand tank, control system and for providing high-pressure airflow gas supply line, clean water storage tank is equipped with water supply line, water supply line is equipped with water pump unit, the output end of water pump unit divides first, second and third delivery line, and first, second and third delivery line are all equipped with the first control valve group of controlling corresponding pipeline on-off. The rust preventive water vapor sand blasting machine, set sand blasting, flushing and blowing function in one, by pneumatic control system one-key switching mode, greatly improve the operation continuity and efficiency;Not only innovatively set up independent rust preventive addition line for sand blasting and flushing function respectively, while being equipped with flowmeter and regulating valve in water supply and rust preventive line, optimize rust preventive use proportion, carry out instant rust protection while surface cleaning, effectively prevent rust.

Description

Technical Field

[0001] This utility model relates to the field of sandblasting equipment technology, specifically a rust inhibitor water vapor sandblasting machine. Background Technology

[0002] Sandblasting machines, as a major surface treatment equipment, are widely used in many industries such as sandblasting equipment, chemical industry, shipbuilding, municipal engineering, and anti-corrosion. They are mainly divided into two types: dry sandblasting machines and wet sandblasting machines. Dry sandblasting machines have been gradually phased out due to serious dust pollution, while wet sandblasting machines have been widely used.

[0003] Chinese utility model patent application number CN220481388U discloses a water vapor anti-rust abrasive sandblasting machine. The process involves installing a three-way valve and a one-way valve at the inlet of a high-pressure plunger pump, connecting a clean water tank and a rust inhibitor tank respectively. The clean water and rust inhibitor are mixed and pumped into a pressure sand tank, forming a mixture of abrasive, water, and rust inhibitor inside. The sprayed abrasive contains water and rust inhibitor, thus achieving dust reduction and corrosion prevention. However, because a second sand addition is required after each abrasive spraying, the mixture of water, rust inhibitor, and residual abrasive particles in the sand tank must be discharged as waste before the second sand addition. The overall utilization rate of the rust inhibitor is only about half, resulting in significant waste. Furthermore, the proportion of rust inhibitor added cannot be accurately displayed, making it difficult to achieve a good anti-corrosion effect.

[0004] Therefore, it is necessary to propose a rust inhibitor water vapor sandblasting machine to solve the above problems. Utility Model Content

[0005] Technical problem to be solved: The purpose of this utility model is to provide a rust inhibitor water vapor sandblasting machine to solve the problem mentioned in the background art that when existing sandblasting machines refill the abrasive in the sand can after each blasting of the abrasive, the mixture of water, rust inhibitor and residual abrasive particles in the sand can is discharged as waste before refilling the sand. The comprehensive utilization rate of the rust inhibitor is only about half, which causes great waste. In addition, the addition ratio of rust inhibitor cannot be accurately displayed, so it is not easy to achieve a good anti-corrosion effect.

[0006] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: A rust inhibitor water vapor sandblasting machine, comprising a sandblasting pipe, a rust inhibitor pressure tank, a clean water storage tank, a sand tank, a control system, and an air supply pipeline for providing high-pressure airflow. The clean water storage tank is equipped with a water supply pipeline, and a water pump unit is installed on the water supply pipeline. The output end of the water pump unit branches into first, second, and third delivery pipelines, and each of the first, second, and third delivery pipelines is equipped with a first control valve group for controlling the on / off state of the corresponding pipeline. The other end of the first delivery pipeline is connected to the input end of the sandblasting pipe, and the other end of the third delivery pipeline is connected to the top of the sand tank. The other end of the second conveying pipeline is connected to the bottom of the sand tank. The bottom of the sand tank is provided with a discharge pipeline, the other end of which is connected to the input end of the sandblasting pipe. A first control valve is provided on the discharge pipeline. The air inlet of the rust inhibitor pressure tank is provided with a second control valve. The input end of the second control valve is connected to the air supply pipeline. The bottom of the rust inhibitor pressure tank is provided with a liquid supply pipeline connected to the input end of the sandblasting pipe. A second control valve group is provided on the liquid supply pipeline. A first air pipe connected to the input end of the sandblasting pipe is provided on the air supply pipeline. A third control valve group is provided on the first air pipe. The first and second control valves and the first, second, and third control valve groups are all connected to the control system.

[0007] Preferably, the water pump unit includes a pneumatic booster water pump and a pressure reducing valve and a first liquid flow meter sequentially arranged on the rear side of the pneumatic booster water pump. The output end of the first liquid flow meter branches into first, second, third and fourth delivery pipelines, and a first water valve switch is provided on the fourth delivery pipeline. The first control valve is a pneumatically controlled sand valve, the second control valve is a pneumatically controlled booster valve, and the third control valve group includes a pressure regulating valve, and a dual pneumatically controlled two-position two-way valve and a fifth one-way valve arranged on the rear side of the pressure regulating valve.

[0008] Preferably, the first control valve group located on the first conveying pipeline includes a first two-way pneumatic valve and a first two-position five-way pneumatic control valve that controls the on / off state of the first two-way pneumatic valve, and a third flow regulating valve and a first check valve are sequentially provided on the rear side of the first two-way pneumatic valve; the first control valve group located on the second conveying pipeline includes a second two-way pneumatic valve and a second two-position five-way pneumatic control valve that controls the on / off state of the second two-way pneumatic valve, and a second check valve is provided on the rear side of the second two-way pneumatic valve; the first control valve group located on the third conveying pipeline includes a third two-way pneumatic valve and a third two-position five-way pneumatic control valve that controls the on / off state of the third two-way pneumatic valve, and a second flow regulating valve is provided on the front side of the third two-way pneumatic valve and a third check valve is provided on the rear side.

[0009] Preferably, the liquid supply pipeline includes a main pipe connected to the nozzle input end, and first and second branch pipes connected to the other end of the main pipe. The other ends of the two branch pipes are connected to the bottom of the rust inhibitor pressure tank. The second control valve group includes a second liquid flow meter installed on the main pipe, and a first flow regulating valve and a fourth check valve sequentially installed behind the second liquid flow meter. It also includes a fourth two-way pneumatic valve and a sixth check valve sequentially installed on the first branch, a fifth two-way pneumatic valve and a seventh check valve sequentially installed on the second branch, a fourth two-position five-way pneumatic control valve for controlling the opening and closing of the fourth two-way pneumatic valve, and a fifth two-position five-way pneumatic control valve for controlling the opening and closing of the fifth two-way pneumatic valve.

[0010] Preferably, the control system includes a spray gun switch, a first two-position three-way normally closed pneumatic control valve, a sixth two-position five-way pneumatic control valve, a second two-position three-way normally closed pneumatic control valve, a first three-position five-way mid-position exhaust valve, a second three-position five-way mid-position exhaust valve, and a ball valve switch. The air supply pipeline branches into first and second air pipes via the ball valve switch. The other end of the second air pipe is connected to the control port of the pneumatic pressurized water pump. The second air pipe is sequentially equipped with an air source processing element, an emergency stop pneumatic valve, a first three-position five-way mid-position exhaust valve, and a water pump air supply switch.

[0011] Preferably, the P ports of the sixth two-position five-way pneumatic control valve, the first two-way pneumatic valve, the second two-way pneumatic valve, the third two-way pneumatic valve, the fourth two-way pneumatic valve, and the fifth two-way pneumatic valve are all connected to the second air pipe between the air source processing element and the emergency stop pneumatic valve. The first air outlet of the first three-position five-way mid-position exhaust valve is connected to the Z port of the second two-position five-way pneumatic control valve. The second air outlet of the first three-position five-way mid-position exhaust valve is connected to the air inlet of the spray gun switch, the pneumatic booster valve, and the second three-position five-way mid-position exhaust valve, respectively. The Z ports of the sixth two-position five-way pneumatic control valve, the first two-position three-way normally closed pneumatic control valve, and the second two-position three-way normally closed pneumatic control valve are all connected to the air outlet of the spray gun switch.

[0012] Preferably, the A and B ports of the sixth two-position five-way pneumatic control valve are respectively connected to the Y and Z ports of the dual pneumatic control two-position two-way valve; the two outlet ports of the second three-position five-way center exhaust valve are respectively connected to the P ports of the first two-position three-way normally closed pneumatic control valve and the second two-position three-way normally closed pneumatic control valve; the Z ports of the pneumatic control sand valve, the third two-position five-way pneumatic control valve, and the fifth two-position five-way pneumatic control valve are all connected to the A port of the second two-position three-way normally closed pneumatic control valve; the Z ports of the first two-position five-way pneumatic control valve and the fourth two-position five-way pneumatic control valve are all connected to the A port of the first two-position three-way normally closed pneumatic control valve.

[0013] Preferably, the top of the sand tank is equipped with a first pressure gauge and a second water valve switch; the top of the rust inhibitor pressure tank is equipped with a second pressure gauge, a pneumatic connector, and a lever-type quick-release connector for adding rust inhibitor. The lever-type quick-release connector is equipped with a manual exhaust switch and a safety pressure relief valve. The pneumatic booster valve is connected to the rust inhibitor pressure tank via the pneumatic connector. The rust inhibitor pressure tank is also equipped with a level gauge for monitoring the rust inhibitor level.

[0014] Beneficial Effects: Compared with existing technologies, this utility model provides a rust inhibitor water vapor sandblasting machine. This rust inhibitor water vapor sandblasting machine has a unique structure and is easy to use. This solution integrates sandblasting, rinsing, and air blowing functions into one unit. Through a pneumatic control system, the mode can be switched with one button, which greatly improves the continuity and efficiency of the operation. Not only are independent rust inhibitor addition pipelines set up for the sandblasting and rinsing functions, but the rust inhibitor is also fully mixed with water, abrasive, and compressed air in the sandblasting pipe, realizing immediate rust protection while cleaning the surface. It effectively reduces dust and prevents rust recurrence, simplifying subsequent processes. In addition, through the cooperation of a flow meter and a regulating valve, the addition ratio of water and rust inhibitor can be precisely controlled and monitored in real time, saving raw materials and reducing the environmental burden while ensuring the best treatment effect. Attached Figure Description

[0015] Figure 1 This is a schematic diagram illustrating the principle of the structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the rust inhibitor pressure tank assembly of this utility model.

[0016] In the diagram: 1. Ball valve switch; 2. Pressure regulating valve; 3. Dual pneumatic two-position two-way valve; 4. Pneumatic sand valve; 5. Air source treatment element; 6. Emergency stop pneumatic valve; 7. Rust inhibitor pressure tank; 8. First flow regulating valve; 9. Second flow regulating valve; 10. Water pump vent switch; 11. Clean water storage tank; 12. Third flow regulating valve; 13. Sand tank; 14. First pressure gauge; 15. Pneumatic booster valve; 16. Level gauge; 17. Second pressure gauge; 18. Lever-type quick-release connector; 19. Manual exhaust switch; 20. Safety pressure relief valve; 21. Pneumatic connector; 101. First check valve; 102. Second check valve; 103. Third check valve; 104. Fourth check valve; 105. Fifth check valve; 106. Sixth check valve; 107. Seventh check valve; 201. First and second... 202. Second 2-position 5-way pneumatic control valve; 203. Third 2-position 5-way pneumatic control valve; 204. Fourth 2-position 5-way pneumatic control valve; 205. Fifth 2-position 5-way pneumatic control valve; 206. Sixth 2-position 5-way pneumatic control valve; 301. First 2-position 3-way normally closed pneumatic control valve; 302. Second 2-position 3-way normally closed pneumatic control valve; 401. First 3-position 5-way neutral position exhaust valve; 402. Second 3-position 5-way neutral position exhaust valve; 501. Pneumatic pressurized water pump; 601. Pressure reducing valve; 701. First liquid flow meter; 702. Second liquid flow meter; 801. First water valve switch; 802. Second water valve switch; 901. First 2-way pneumatic valve; 902. Second 2-way pneumatic valve; 903. Third 2-way pneumatic valve; 904. Fourth 2-way pneumatic valve; 905. Fifth 2-way pneumatic valve. Detailed Implementation

[0017] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0018] Example 1: This Example 1 provides a rust inhibitor water vapor sandblasting machine, which is a direct improvement on existing sandblasting equipment. It has a unique structure. Please refer to [link / reference]. Figure 1-2As shown, the system includes a sandblasting pipe, a rust inhibitor pressure tank 7, a clean water storage tank 11, a sand tank 13, a control system, and an air supply pipeline for providing high-pressure airflow. The clean water storage tank 11 is equipped with a water supply pipeline, on which a water pump unit is installed. The output end of the water pump unit branches into first, second, and third delivery pipelines, each equipped with a first control valve group to control the on / off state of its respective pipeline. The other end of the first delivery pipeline is connected to the input end of the sandblasting pipe, the other end of the third delivery pipeline is connected to the top of the sand tank 13, and the other end of the second delivery pipeline is connected to the bottom of the sand tank 13. The sand tank 13 is connected to a discharge pipe at its bottom, with the other end of the discharge pipe connected to the input end of the sandblasting pipe. A first control valve is provided on the discharge pipe. The air inlet of the rust inhibitor pressure tank 7 is provided with a second control valve, with the input end of the second control valve connected to the air supply pipe. The bottom of the rust inhibitor pressure tank 7 is provided with a liquid supply pipe connected to the input end of the sandblasting pipe, and a second control valve group is provided on the liquid supply pipe. A first air pipe connected to the input end of the sandblasting pipe is provided on the air supply pipe, and a third control valve group is provided on the first air pipe. The first and second control valves, as well as the first, second, and third control valve groups, are all connected to the control system.

[0019] The water pump unit includes a pneumatic pressurized water pump 501 and a pressure reducing valve 601 and a first liquid flow meter 701 arranged sequentially on the rear side of the pneumatic pressurized water pump 501. The output end of the first liquid flow meter 701 branches into first, second, third and fourth delivery pipelines, and the fourth delivery pipeline is equipped with a first water valve switch 801. The first control valve is a pneumatic sand valve 4, the second control valve is a pneumatic booster valve 15, and the third control valve group includes a pressure regulating valve 2, and a double pneumatic two-position two-way valve 3 and a fifth one-way valve 105 arranged on the rear side of the pressure regulating valve 2.

[0020] The first control valve group located on the first conveying pipeline includes a first two-way pneumatic valve 901 and a first two-position five-way pneumatic control valve 201 that controls the opening and closing of the first two-way pneumatic valve 901. A third flow regulating valve 12 and a first check valve 101 are sequentially provided on the rear side of the first two-way pneumatic valve 901. The first control valve group located on the second conveying pipeline includes a second two-way pneumatic valve 902 and a second two-position five-way pneumatic control valve 202 that controls the opening and closing of the second two-way pneumatic valve 902. A second check valve 102 is provided on the rear side of the second two-way pneumatic valve 902. The first control valve group located on the third conveying pipeline includes a third two-way pneumatic valve 903 and a third two-position five-way pneumatic control valve 203 that controls the opening and closing of the third two-way pneumatic valve 903. A second flow regulating valve 9 is provided on the front side of the third two-way pneumatic valve 903 and a third check valve 103 is provided on the rear side.

[0021] The liquid supply pipeline includes a main pipe connected to the nozzle input end, and first and second branch pipes connected to the other end of the main pipe. The other ends of the two branch pipes are connected to the bottom of the rust inhibitor pressure tank 7. The second control valve group includes a second liquid flow meter 702 installed on the main pipe, and a first flow regulating valve 8 and a fourth check valve 104 installed sequentially on the rear side of the second liquid flow meter 702. It also includes a fourth two-way pneumatic valve 904 and a sixth check valve 106 installed sequentially on the first branch, a fifth two-way pneumatic valve 905 and a seventh check valve 107 installed sequentially on the second branch, a fourth two-position five-way pneumatic control valve 204 that controls the opening and closing of the fourth two-way pneumatic valve 904, and a fifth two-position five-way pneumatic control valve 205 that controls the opening and closing of the fifth two-way pneumatic valve 905.

[0022] The control system includes a spray gun switch, a first two-position three-way normally closed pneumatic control valve 301, a sixth two-position five-way pneumatic control valve 206, a second two-position three-way normally closed pneumatic control valve 302, a first three-position five-way neutral exhaust valve 401, a second three-position five-way neutral exhaust valve 402, and a ball valve switch 1. The air supply pipeline branches into first and second air pipes via the ball valve switch 1. The other end of the second air pipe is connected to the control port of the pneumatic pressurized water pump 501. The second air pipe is sequentially equipped with an air source processing element 5, an emergency stop pneumatic valve 6, a first three-position five-way neutral exhaust valve 401, and a water pump air supply switch 10.

[0023] The P ports of the sixth two-position five-way pneumatic control valve 206, the first two-way pneumatic valve 901, the second two-way pneumatic valve 902, the third two-way pneumatic valve 903, the fourth two-way pneumatic valve 904, and the fifth two-way pneumatic valve 905 are all connected to the second air pipe between the air source processing element 5 and the emergency stop pneumatic valve 6. The first air outlet of the first three-position five-way intermediate exhaust valve 401 is connected to the Z port of the second two-position five-way pneumatic control valve 202. The second air outlet of the first three-position five-way intermediate exhaust valve 401 is connected to the air inlet of the spray gun switch, the pneumatic booster valve 15, and the second three-position five-way intermediate exhaust valve 402, respectively. The Z ports of the sixth two-position five-way pneumatic control valve 206, the first two-position three-way normally closed pneumatic control valve 301, and the second two-position three-way normally closed pneumatic control valve 302 are all connected to the air outlet of the spray gun switch.

[0024] The A and B ports of the sixth two-position five-way pneumatic control valve 206 are connected to the Y and Z ports of the double pneumatic control two-position two-way valve 3, respectively; the two outlet ports of the second three-position five-way neutral exhaust valve 402 are connected to the P ports of the first two-position three-way normally closed pneumatic control valve 301 and the second two-position three-way normally closed pneumatic control valve 302, respectively; the Z ports of the pneumatic control sand valve 4, the third two-position five-way pneumatic control valve 203, and the fifth two-position five-way pneumatic control valve 205 are all connected to the A port of the second two-position three-way normally closed pneumatic control valve 302; the Z ports of the first two-position five-way pneumatic control valve 201 and the fourth two-position five-way pneumatic control valve 204 are all connected to the A port of the first two-position three-way normally closed pneumatic control valve 301.

[0025] The top of the sand tank 13 is equipped with a first pressure gauge 14 and a second water valve switch 802; the top of the rust inhibitor pressure tank 7 is equipped with a second pressure gauge 17, a pneumatic connector 21, and a lever-type quick-release connector 18 for adding rust inhibitor. The lever-type quick-release connector 18 is equipped with a manual exhaust switch 19 and a safety pressure relief valve 20. The pneumatic booster valve 15 is connected to the rust inhibitor pressure tank 7 via the pneumatic connector 21. The rust inhibitor pressure tank 7 is also equipped with a level gauge 16 for monitoring the rust inhibitor level.

[0026] Working principle: When adding sand and water to sand jar 13, first, open the emergency stop pneumatic valve 6 to put the first three-position five-way vent valve 401 in the middle position. At this time, neither the first nor the second vent of the first three-position five-way vent valve 401 will release air. Open the second water valve switch 802. When the value of the first pressure gauge 14 is zero, open the mushroom head feeding port on the top of sand jar 13 to add sand. After the sand is basically full, close the second water valve switch 802 on sand jar 13. Open the water pump vent switch 10 to start the pneumatic pressurized water pump 501. Slowly open the first water valve switch 801 and inject water into the feed hopper on the top of sand jar 13 through the fourth conveying pipeline to flush the abrasive in the feed hopper into sand jar 13. When the water in sand jar 13 has submerged the top mushroom head, close the first water valve switch 801 and then close the top mushroom head of sand jar 13.

[0027] To add rust inhibitor to the rust inhibitor pressure tank 7, first, open the manual vent switch 19 on top of the rust inhibitor pressure tank 7. When the value of the second pressure gauge 17 on top of the rust inhibitor pressure tank 7 is zero, remove the lever-type quick-release connector 18 on top. Then, add rust inhibitor to the upper inlet on top of the rust inhibitor pressure tank 7. When the level gauge 16 reaches the required value, finally reinstall the lever-type quick-release connector 18 and close the manual vent switch 19 to complete the addition of rust inhibitor.

[0028] Pressurization: The first three-position five-way neutral exhaust valve 401 is in the first position, the first air outlet of the first three-position five-way neutral exhaust valve 401 is connected, the control port of the second two-position five-way pneumatic control valve 202 switches the working state, the second two-way pneumatic valve 902 is opened, the second clean water delivery pipeline of the water supply system is connected, and clean water enters the sand tank 13 from the bottom of the sand tank 13 to realize the sand tank pressurization function of the sandblasting machine.

[0029] Sandblasting: With the first three-position five-way central exhaust valve 401 and the second three-position five-way central exhaust valve 402 in the second position, the second air outlets of the first three-position five-way central exhaust valve 401 and the second three-position five-way central exhaust valve 402 are both connected. At this time, the pneumatic booster valve 15 of the rust inhibitor supply system is connected, and there is air in the air inlets of the first two-position five-way pneumatic control valve 201, the second two-position five-way pneumatic control valve 202, the third two-position five-way pneumatic control valve 203, the fourth two-position five-way pneumatic control valve 204, the fifth two-position five-way pneumatic control valve 205, and the sixth two-position five-way pneumatic control valve 206. There is air in the second connecting pipe of the spray gun switch and the air inlet of the second two-position three normally closed pneumatic control valve 302. Since the fourth two-way pneumatic valve 904 and the fifth two-way pneumatic valve 905 are in the closed state, the liquid in the rust inhibitor pipeline does not flow.

[0030] When the spray gun switch is pressed, the first and second connecting pipes of the spray gun switch are connected, and air is supplied to the control port of the second two-position three-way normally closed air control valve 302. The second two-position three-way normally closed air control valve 302 and the sixth two-position five-way air control valve 206 are opened. The sixth two-position five-way air control valve 206 controls the opening of the double air-controlled two-position two-way valve 3, connecting the sandblasting pipe to the air supply line. Port A of the second two-position three-way normally closed air control valve 302 is divided into the first, second, and third air outlets via the second four-way pipe. The first air outlet of the second two-position three-way normally closed air control valve 302 controls the opening of the air-controlled sand valve 4, the second air outlet controls the opening of the third two-position five-way air control valve 203, the third two-way pneumatic valve 903, and the third air outlet controls the fifth... The two-position five-way pneumatic control valve 205 opens the fifth two-way pneumatic valve 905 of the second branch, connecting the second branch of the rust inhibitor pressure tank 7. Due to the pressure effect of the rust inhibitor pressure tank 7, the rust inhibitor is transported to the sandblasting pipe through the seventh one-way valve 107, the second liquid flow meter 702, the first flow regulating valve 8, and the fourth one-way valve 104. In addition, when the pneumatic sand control valve 4 and the third two-way pneumatic valve 903 are opened, the pneumatic pressurized water pump 501 continuously pumps high-pressure water into the sand tank 13. Due to the pressure difference effect, the mixture of sand and water in the sand tank 13 is transported to the sandblasting pipe through the pneumatic sand control valve 4. The water, sand, and rust inhibitor are sprayed out from the sandblasting pipe nozzle under the propulsion of the high-speed airflow to achieve the sandblasting function.

[0031] Flushing: Set the first three-position five-way central exhaust valve 401 to the second position and the second three-position five-way central exhaust valve 402 to the first position. At this time, the second air outlet of the first three-position five-way central exhaust valve 401 and the first air outlet of the second three-position five-way central exhaust valve 402 are both connected. The pneumatic booster valve 15 is connected. The air inlets of the first two-position five-way pneumatic control valve 201, the second two-position five-way pneumatic control valve 202, the third two-position five-way pneumatic control valve 203, the fourth two-position five-way pneumatic control valve 204, the fifth two-position five-way pneumatic control valve 205, and the sixth two-position five-way pneumatic control valve 206 are filled with air. The second connecting pipe of the spray gun switch and the air inlet of the first two-position three normally closed pneumatic control valve 301 are filled with air. Since the two second control valves, namely the fourth two-way pneumatic valve 904 and the fifth two-way pneumatic valve 905, are in the closed state, the liquid in the rust inhibitor pipeline does not flow.

[0032] When the spray gun switch is pressed, due to the air circuit connection within the spray gun switch, air is supplied to the control ports of the 6th 2nd position 5-way air control valve 206 and the 1st 2nd position 3-way normally closed air control valve 301. The 6th 2nd position 5-way air control valve 206 controls the opening of the dual air-controlled 2nd position 2-way valve 3, connecting the sandblasting pipe to the air supply line. The air outlet of the 1st 2nd position 3-way normally closed air control valve 301 is divided into a first air outlet and a second air outlet via a 3-way pipe. The first air outlet of the 1st 2nd position 3-way normally closed air control valve 301 controls the 1st 2nd position 5-way air control valve 201 to open the 1st 2-way pneumatic valve 901, cleaning... The first water delivery pipeline is connected, and the pneumatic pressurized water pump 501 delivers clean water to the sandblasting pipe. The second air outlet controls the fourth two-position five-way pneumatic control valve 204, which opens the fourth two-way pneumatic valve 904 on the first rust inhibitor delivery pipeline. The rust inhibitor in the rust inhibitor pressure tank 7 is pressurized by the pneumatic booster valve 15 and delivered to the sandblasting pipe through the sixth one-way valve 106, the second liquid flow meter 702, the first flow regulating valve 8, and the fourth one-way valve 104. The clean water and rust inhibitor are sprayed out from the sandblasting pipe outlet under the high-speed airflow of the air supply pipeline to achieve the rinsing function.

[0033] Air blowing: Position the first three-position five-way neutral exhaust valve 401 to the second position and the second three-position five-way neutral exhaust valve 402 to the middle position. At this time, the second outlet of the first three-position five-way neutral exhaust valve 401 is open, and both outlets of the second three-position five-way neutral exhaust valve 402 are closed. Compressed gas in the intake pipe of either the first two-position three-way normally closed air control valve 301 or the second two-position three-way normally closed air control valve 302 can pass through the second three-position five-way neutral exhaust valve 402. The exhaust port discharges, thus achieving the cut-off state; the first two-way pneumatic valve 901, the second two-way pneumatic valve 902, the third two-way pneumatic valve 903, the fourth two-way pneumatic valve 904, the fifth two-way pneumatic valve 905, and the pneumatic sand control valve 4 are all in the closed state; after pressing the spray gun switch, due to the air circuit connection in the spray gun switch, the sixth two-position five-way pneumatic control valve 206 can only control the double pneumatic control two-position two-way valve 3 to open, the sandblasting pipe is connected to the air supply line, and only compressed air is sprayed out of the sandblasting pipe.

[0034] The above solution allows for the opening of different rust inhibitor delivery pipelines during sandblasting or rinsing, ensuring that rust inhibitor is sprayed from the sandblasting nozzle during both sandblasting and rinsing functions. Simultaneously, the second flow regulating valve 9 adjusts the sand volume during sandblasting, and the third flow regulating valve 12 adjusts the water volume during rinsing. During both sandblasting and rinsing, the first flow regulating valve 8 is adjusted based on the values ​​of the first liquid flow meter 701 and the second liquid flow meter 702, ensuring that the rust inhibitor is added in a precise proportion.

[0035] Although embodiments of the present 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 present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A rust inhibitor water vapor sandblasting machine, comprising a sandblasting pipe, characterized in that: It also includes a rust inhibitor pressure tank (7), a clean water storage tank (11), a sand tank (13), a control system, and a gas supply pipeline for providing high-pressure airflow. The clean water storage tank (11) is equipped with a water supply pipeline, and a water pump unit is provided on the water supply pipeline. The output end of the water pump unit branches into first, second, and third delivery pipelines, and each of the first, second, and third delivery pipelines is equipped with a first control valve group to control the opening and closing of the corresponding pipeline. The other end of the first delivery pipeline is connected to the input end of the sandblasting pipe, the other end of the third delivery pipeline is connected to the top of the sand tank (13), and the other end of the second delivery pipeline is connected to the bottom of the sand tank (13). The bottom of the sand tank (13) is provided with a discharge pipe, the other end of which is connected to the input end of the sandblasting pipe, and a first control valve is provided on the discharge pipe; the air inlet of the rust inhibitor pressure tank (7) is provided with a second control valve, the input end of which is connected to the air supply pipe, the bottom of the rust inhibitor pressure tank (7) is provided with a liquid supply pipe connected to the input end of the sandblasting pipe, and a second control valve group is provided on the liquid supply pipe; a first air pipe connected to the input end of the sandblasting pipe is provided on the air supply pipe, and a third control valve group is provided on the first air pipe; the first and second control valves and the first, second and third control valve groups are all connected to the control system.

2. The rust inhibitor water vapor blasting machine according to claim 1, characterized in that: The water pump unit includes a pneumatic pressurized water pump (501) and a pressure reducing valve (601) and a first liquid flow meter (701) arranged sequentially on the rear side of the pneumatic pressurized water pump (501). The output end of the first liquid flow meter (701) branches into first, second, third and fourth delivery pipelines, and a first water valve switch (801) is provided on the fourth delivery pipeline. The first control valve is a pneumatic sand valve (4), the second control valve is a pneumatic booster valve (15), and the third control valve group includes a pressure regulating valve (2), and a double pneumatic two-position two-way valve (3) and a fifth check valve (105) arranged on the rear side of the pressure regulating valve (2).

3. The rust inhibitor water vapor sandblasting machine according to claim 2, characterized in that: The first control valve group located on the first conveying pipeline includes a first two-way pneumatic valve (901) and a first two-position five-way pneumatic control valve (201) that controls the opening and closing of the first two-way pneumatic valve (901). A third flow regulating valve (12) and a first check valve (101) are sequentially provided on the rear side of the first two-way pneumatic valve (901). The first control valve group located on the second conveying pipeline includes a second two-way pneumatic valve (902) and a second two-position five-way pneumatic control valve (202) that controls the opening and closing of the second two-way pneumatic valve (902). A second check valve (102) is provided on the rear side of the second two-way pneumatic valve (902). The first control valve group located on the third conveying pipeline includes a third two-way pneumatic valve (903) and a third two-position five-way pneumatic control valve (203) that controls the opening and closing of the third two-way pneumatic valve (903). A second flow regulating valve (9) is provided on the front side of the third two-way pneumatic valve (903) and a third check valve (103) is provided on the rear side.

4. A rust inhibitor water vapor blasting machine according to claim 1, characterized in that: The liquid supply pipeline includes a main pipe connected to the nozzle input end, and a first and a second branch pipe connected to the other end of the main pipe. The other ends of the two branch pipes are connected to the bottom of the rust inhibitor pressure tank (7). The second control valve group includes a second liquid flow meter (702) installed on the main pipe, and a first flow regulating valve (8) and a fourth check valve (104) installed sequentially on the rear side of the second liquid flow meter (702). It also includes a fourth two-way pneumatic valve (904) and a sixth check valve (106) installed sequentially on the first branch, a fifth two-way pneumatic valve (905) and a seventh check valve (107) installed sequentially on the second branch, a fourth two-position five-way pneumatic control valve (204) that controls the opening and closing of the fourth two-way pneumatic valve (904), and a fifth two-position five-way pneumatic control valve (205) that controls the opening and closing of the fifth two-way pneumatic valve (905).

5. A rust inhibitor water vapor blasting machine according to claim 4, characterized in that: The control system includes a spray gun switch, a first two-position three-way normally closed air control valve (301), a sixth two-position five-way air control valve (206), a second two-position three-way normally closed air control valve (302), a first three-position five-way mid-position exhaust valve (401), a second three-position five-way mid-position exhaust valve (402), and a ball valve switch (1). The air supply pipeline branches into the first and second air pipes via the ball valve switch (1). The other end of the second air pipe is connected to the control port of the pneumatic pressurized water pump (501). The second air pipe is equipped with an air source processing element (5), an emergency stop pneumatic valve (6), a first three-position five-way mid-position exhaust valve (401), and a water pump air supply switch (10) in sequence.

6. A rust inhibitor water vapor blasting machine according to claim 5, characterized in that: The P ports of the sixth two-position five-way pneumatic control valve (206), the first two-way pneumatic valve (901), the second two-way pneumatic valve (902), the third two-way pneumatic valve (903), the fourth two-way pneumatic valve (904), and the fifth two-way pneumatic valve (905) are all connected to the second air pipe between the air source processing element (5) and the emergency stop pneumatic valve (6). The first air outlet of the first three-position five-way mid-position exhaust valve (401) is connected to the Z port of the second two-position five-way pneumatic control valve (202). The second air outlet of the first three-position five-way mid-position exhaust valve (401) is connected to the air inlet of the spray gun switch, the pneumatic booster valve (15), and the second three-position five-way mid-position exhaust valve (402), respectively. The Z ports of the sixth two-position five-way pneumatic control valve (206), the first two-position three-way normally closed pneumatic control valve (301), and the second two-position three-way normally closed pneumatic control valve (302) are all connected to the air outlet of the spray gun switch.

7. A rust inhibitor water vapor blasting machine according to claim 6, characterized in that: The A and B ports of the sixth two-position five-way pneumatic control valve (206) are respectively connected to the Y and Z ports of the double pneumatic control two-position two-way valve (3); the two outlet ports of the second three-position five-way middle position exhaust valve (402) are respectively connected to the P ports of the first two-position three-way normally closed pneumatic control valve (301) and the second two-position three-way normally closed pneumatic control valve (302); the Z ports of the pneumatic control sand valve (4), the third two-position five-way pneumatic control valve (203), and the fifth two-position five-way pneumatic control valve (205) are all connected to the A port of the second two-position three-way normally closed pneumatic control valve (302); the Z ports of the first two-position five-way pneumatic control valve (201) and the fourth two-position five-way pneumatic control valve (204) are all connected to the A port of the first two-position three-way normally closed pneumatic control valve (301).

8. A rust inhibitor water vapor blasting machine according to claim 7, characterized in that: The top of the sand tank (13) is equipped with a first pressure gauge (14) and a second water valve switch (802); the top of the rust inhibitor pressure tank (7) is equipped with a second pressure gauge (17), a pneumatic connector (21) and a lever-type quick-release connector (18) for adding rust inhibitor. The lever-type quick-release connector (18) is equipped with a manual exhaust switch (19) and a safety pressure relief valve (20). The pneumatic booster valve (15) is connected to the rust inhibitor pressure tank (7) via the pneumatic connector (21). The rust inhibitor pressure tank (7) is also equipped with a level gauge (16) for monitoring the rust inhibitor level.

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