Sand blasting pneumatic control system and sand blasting equipment

Abstract

The invention provides a sand blasting pneumatic control system and sand blasting equipment, and belongs to the technical field of water heater production, the control system comprises a compressed air source and an air distribution system, and the air distribution system comprises at least one air inlet and at least one air outlet. An air inlet of the air distribution system is communicated with a compressed air source, and an air outlet of the air distribution system is communicated with the proportional valve through a pipeline. A mixing cavity is formed in the proportional valve, the mixing cavity is communicated with an outlet of the air distribution system and further communicated with the sand supply device, and a sand outlet is formed in the mixing cavity and communicated with the spray gun. According to the system, the pneumatic control mode that traditional sand blasting equipment pressurizes the interior of the pressure tank is changed, air is supplied to the spray gun through the brand new air path control system, air pressure loss can be reduced, the spraying effect of the spray gun branch is enhanced, and the sand blasting quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of water heater production, and in particular to a sandblasting pneumatic control system and sandblasting equipment. Background Art

[0002] In the air-energy water heater industry, the enamel treatment of the water tank liner is an important part of the manufacturing process. Before enamelling, the surface of the liner must undergo strict surface treatment to ensure that the oxides, rust, welding slag, oil stains and other pollutants on the steel plate surface are completely removed, so that the coated surface reaches a certain degree of flatness and roughness. This step is crucial because it directly affects the adhesion between the coating and the steel surface, which in turn determines the ability of the water tank to resist corrosion and damage from external media and the overall service life. Traditional surface treatment methods are insufficient in processing efficiency, degree of automation and sandblasting effect. Especially in the sandblasting process, the traditional pneumatic sandblasting machine pressurizes the pressure tank to achieve air-sand mixing. This method has poor surface treatment effect on the enamel liner of the air-energy water heater, and often cannot fully improve the roughness and flatness of the liner surface, thereby affecting the quality of subsequent coatings. In addition, traditional sandblasting equipment has limitations in the structure of the air supply pipeline and the control system, resulting in a large pressure loss of compressed air when passing through the sandblasting equipment, which not only affects the sandblasting effect, but also increases energy consumption.

[0003] Therefore, it is necessary to improve the existing sandblasting equipment to overcome the defects of the prior art. Summary of the invention

[0004] In order to overcome the problems existing in the related art, one of the purposes of the present invention is to provide a sandblasting pneumatic control system, which changes the pneumatic control method of pressurizing the pressure tank of the traditional sandblasting equipment, and supplies air to the spray gun through a new air circuit control system, which can reduce air pressure loss, enhance the spraying effect of the spray gun circuit, and improve the sandblasting quality.

[0005] A sandblasting pneumatic control system, comprising:

[0006] Compressed air source;

[0007] An air distribution system, the air distribution system comprising at least one air inlet and at least one air outlet; the air inlet of the air distribution system is connected to the compressed air source, and the air outlet of the air distribution system is connected to a proportional valve through a pipeline;

[0008] The proportioning valve is provided with a mixing chamber, the mixing chamber is communicated with the outlet of the gas distribution system, the mixing chamber is also communicated with a sand supply device, and the mixing chamber is provided with a sand outlet, and the sand outlet is communicated with the spray gun.

[0009] In this control system, the compressed air source is used to provide stable and pure compressed air as the power source for the sandblasting operation. The air distribution system is used to adjust and control the compressed air pressure entering the proportional valve to ensure that the compressed air can be evenly distributed to the mixing chamber of the proportional valve. The compressed air and sand are mixed in the mixing chamber and sprayed out from the sandblasting port to achieve uniform sandblasting of the enamel inner tank of the water heater.

[0010] Among them, the proportional valve is the key link in the sandblasting operation, and a mixing chamber is arranged inside it. In the mixing chamber, the compressed air and the sand material are fully mixed to form a high-speed jet sand flow, which is connected to the spray gun through the sand outlet and finally acts on the surface of the enamel inner tank. As the actuator of the sandblasting operation, the spray gun sprays the mixed sand flow onto the surface of the enamel inner tank to achieve surface cleaning and roughening. The working process of the system is as follows: When the system is started, the compressed air source provides stable compressed air to the air distribution system. After being adjusted by the air distribution system, the compressed air is evenly distributed to the branches where each spray gun is located. When the spray gun is operating, the solenoid valve controls the air control valve to open, so that the compressed air enters the mixing chamber of the proportional valve. At the same time, the sand supply device sends the sand material into the mixing chamber and mixes with the compressed air to form a sand flow. Finally, the sand flow is sprayed onto the surface of the enamel inner tank through the spray gun to complete the sandblasting operation.

[0011] The control system achieves the mixing of air and sand in the proportional valve, changes the mixing mode of air and sand, increases the spray force of sand, and enables the sandblasting operation to more thoroughly remove pollutants on the surface of the inner tank, improve the surface roughness, and thus enhance the adhesion between the coating and the steel surface. The air distribution system optimizes the air supply pipeline structure and the air circuit control system, reduces the pressure loss of compressed air during transmission, and improves energy utilization efficiency. The pneumatic control system can also be used to achieve precise control of compressed air in each branch, so that the sandblasting operation can be carried out automatically, improving production efficiency and safety.

[0012] In a preferred technical solution of the present invention, it also includes a pressure regulating valve and a pilot valve that are connected to each other, the inlet of the pressure regulating valve is connected to the compressed air source, and the outlet of the pilot valve is connected to the air inlet of the air distribution system.

[0013] The pressure regulating valve enables the system to accurately adjust the air pressure from the compressed air source. This ensures that the air pressure received by the air distribution system is stable and appropriate, thus meeting the specific requirements of air pressure in different application scenarios.

[0014] The interconnected design of the pilot valve and the pressure regulating valve can achieve rapid response and regulation of air pressure. The pilot valve usually has a small size and a fast response speed. It can respond quickly when the air pressure changes and adjust the air pressure in time through the pressure regulating valve. In addition, through the coordinated work of the pressure regulating valve and the pilot valve, the system can more effectively resist external interference and air pressure fluctuations. This design helps to maintain the stability of air pressure and reduce equipment failure or performance degradation caused by unstable air pressure.

[0015] In a preferred technical solution of the present invention, the gas separation system includes a first gas separation device and a second gas separation device, the first gas separation device is provided with a first gas inlet and three first gas outlets; the second gas separation device is provided with three second gas inlets and a plurality of second gas outlets;

[0016] Wherein, the first air inlet on the first air distribution device is connected to the compressed air source, any one of the first air outlets is connected to the inlet of the pressure regulating valve, any two of the first air outlets are respectively connected to one of the second air inlets of the second air distribution device, and the outlet of the pilot valve is connected to one of the second air inlets;

[0017] The second air outlet is communicated with the proportional valve.

[0018] The present embodiment provides a detailed structure of an air distribution system. Among them, the air distribution system realizes the graded distribution of airflow through the first air distribution device and the second air distribution device. The first air distribution device preliminarily distributes the airflow from the compressed air source, and then further refines the distribution through the second air distribution device, ensuring the efficient use of the airflow. The air distribution system is designed with multiple air outlets and air inlets, which can be flexibly configured according to actual needs. For example, different first air outlets can be selected to be connected to the pressure regulating valve according to needs, or the connection method between the second air inlet and the first air outlet on the second air distribution device can be adjusted.

[0019] In a preferred technical solution of the present invention, 3-6 second air outlets are provided, wherein any one of the second air outlets is connected to an external air storage tank through a pipeline.

[0020] In a preferred technical solution of the present invention, a gas storage outlet is provided on the gas storage tank, and the gas storage outlet is communicated with the mixing chamber of the proportional valve. The second gas outlet is externally connected to the gas storage tank through a pipeline, which enables the control system to store excess gas when there is no need to use the gas continuously. This not only reduces the waste of gas, but also allows the stored gas to be reused when needed, thereby improving the overall efficiency and sustainability. The gas storage outlet provided on the gas storage tank is communicated with the mixing chamber of the proportional valve, which enables the gas stored in the gas storage tank to be introduced into the mixing chamber when needed and mixed with the sand particles. In this way, the mixing ratio of the gas can be more easily controlled and adjusted to meet the requirements of uniform sandblasting.

[0021] In addition, since the gas tank can store and reuse gas, the control system can continue to provide stable gas output in the event of unstable or interrupted gas supply. This enhances the stability and reliability of the system and ensures the continuity of the sandblasting process.

[0022] In a preferred technical solution of the present invention, a plurality of the second air outlets are respectively connected to a mixing chamber of the proportional valve, and an air-controlled valve is further provided between the second air outlet and the proportional valve, and the on-off of the air-controlled valve is controlled by a solenoid valve.

[0023] In this embodiment, the control system claimed in the present application realizes precise control of the gas flow rate entering the mixing chamber by combining the control of the gas control valve and the solenoid valve. This control method can adjust the proportion of each gas flow according to the specific process requirements, so as to achieve the best gas mixing effect and ensure the quality and efficiency of the sandblasting operation. Using the solenoid valve and the gas control valve to control the on and off of the gas not only realizes the automatic operation, but also reduces the complexity and error of manual intervention.

[0024] In a preferred technical solution of the present invention, the first air distribution device includes a shell, an air storage chamber is arranged in the shell, the first air inlet and the first air outlet are both arranged on the shell, and the first air inlet and the first air outlet are both connected to the air storage chamber.

[0025] By providing a gas storage chamber in the housing and connecting the first gas inlet and the first gas outlet thereto, the gas distribution device of the present application ensures uniform distribution of gas in the gas distribution device. This design reduces eddy and turbulent phenomena during gas flow, improves the stability of gas distribution, and thus ensures the stability of subsequent processes.

[0026] In a preferred technical solution of the present invention, a safety valve and a drain valve are provided on the shell, the drain valve is provided at the bottom of the shell, and both the safety valve and the drain valve are connected to the gas storage chamber. The safety valve provided on the shell can automatically open when the pressure in the gas storage chamber is too high to release excess gas and prevent equipment damage or accidents. At the same time, the setting of the drain valve facilitates the timely discharge of accumulated water in the gas storage chamber, preventing moisture from causing adverse effects on gas quality and equipment, and further enhancing the safety and reliability of the system.

[0027] In a preferred technical solution of the present invention, a pressure regulating device is provided at the first air outlet, and the pressure regulating device includes a pressure gauge and a regulating valve. The pressure gauge is fixed on the shell and connected to the first air outlet, and the regulating valve is used to adjust the size of the first air outlet.

[0028] This embodiment provides a specific structure of the gas separation device. The setting of the pressure regulating device enables the operator to monitor the gas pressure in real time and adjust the size of the first gas outlet as needed to achieve accurate control of the gas pressure. This design not only improves the accuracy of the process, but also facilitates the timely discovery and handling of potential problems.

[0029] A second object of the present invention is to provide a sandblasting device, comprising a sandblasting body, on which the sandblasting pneumatic control system as described above is provided.

[0030] The beneficial effects of the present invention are:

[0031] The present invention provides a pneumatic control system for sandblasting, which includes a compressed air source and an air distribution system, wherein the air distribution system includes at least one air inlet and at least one air outlet. The air inlet of the air distribution system is connected to the compressed air source, and the air outlet of the air distribution system is connected to a proportional valve through a pipeline. A mixing chamber is provided in the proportional valve, which is connected to the outlet of the air distribution system, and is also connected to a sand supply device. A sand outlet is provided on the mixing chamber, and the sand outlet is connected to a spray gun. Traditional sandblasting equipment usually controls sandblasting by pressurizing the pressure tank, which is easy to cause pressure loss during pressure transmission and conversion. The control system directly supplies air to the spray gun through a new air circuit design, which reduces the intermediate links, thereby effectively reducing the loss of air pressure during the transmission process, so that the spray gun circuit can obtain more stable and sufficient air pressure, ensuring that the spray gun can output sand more smoothly during the spraying process, improving the uniformity and strength of the sand spraying, and ensuring the sandblasting effect. The pneumatic control system for sandblasting is used in the production process of water heaters, which can improve the sandblasting quality of the inner tank of the water heater, help improve the quality of coating coating, and extend the service life of the water heater.

[0032] The present application also provides a sandblasting device including the above-mentioned sandblasting pneumatic control system, which can be used for sandblasting the inner liner of the water tank during the production of the heater, and because the sandblasting pneumatic control system has efficient air supply and sandblasting operation capabilities, the sandblasting device can quickly complete the sandblasting of the inner liner of the water tank, which can reduce the time of the sandblasting operation, thereby improving the overall production efficiency. And it can ensure the stability of the air pressure and the sand material flow rate during the sandblasting process, thereby ensuring the sandblasting quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic structural diagram of the sandblasting pneumatic control system provided in Example 1 of the present invention;

[0034] Figure 2 is a schematic structural diagram of the sandblasting pneumatic control system provided in Example 2 of the present invention;

[0035] Figure 3 is a schematic structural diagram of the sandblasting pneumatic control system provided in Example 3 of the present invention;

[0036] Figure 4 is a schematic structural diagram of a first gas separation device provided in an embodiment of the present invention;

[0037] Figure 5 is a schematic structural diagram of a second gas separation device provided in an embodiment of the present invention;

[0038] Figure 6 It is a structural schematic diagram of the cooperation between the proportional valve and the sand supply device provided in the embodiment of the present invention;

[0039] Figure 7 It is a schematic diagram of the structure of the gas storage tank provided in the embodiment provided by the present invention.

[0040] Reference numerals:

[0041] 1. Compressed air source; 2. Air distribution system; 21. First air distribution device; 211. First air inlet; 212. First air outlet; 213. Air storage chamber; 214. Drain valve; 215. Pressure gauge; 216. Regulating valve; 217. Safety valve; 218. Shell; 22. Second air distribution device; 221. Second air inlet; 222. Second air outlet; 3. Proportional valve; 31. Mixing chamber; 32. Sand outlet; 4. Spray gun; 5. Pressure regulating valve; 6. Pilot valve; 7. Air control valve; 8. Air storage tank; 81. Air storage outlet; 9. Solenoid valve; 10. Sand supply device; DETAILED DESCRIPTION

[0042] The preferred embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the accompanying drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0043] In the air-energy water heater industry, the enamel treatment of the water tank liner is an important part of the manufacturing process. Before enamelling, the surface of the liner must undergo strict surface treatment to ensure that the oxides, rust, welding slag, oil stains and other pollutants on the steel plate surface are completely removed, so that the coated surface reaches a certain degree of flatness and roughness. This step is crucial because it directly affects the adhesion between the coating and the steel surface, which in turn determines the ability of the water tank to resist corrosion and damage from external media and the overall service life. Traditional surface treatment methods are insufficient in processing efficiency, degree of automation and sandblasting effect. Especially in the sandblasting process, the traditional pneumatic sandblasting machine pressurizes the pressure tank to achieve air-sand mixing. This method has poor surface treatment effect on the enamel liner of the air-energy water heater, and often cannot fully improve the roughness and flatness of the liner surface, thereby affecting the quality of subsequent coatings. In addition, traditional sandblasting equipment has limitations in the structure of the air supply pipeline and the control system, resulting in a large pressure loss of compressed air when passing through the sandblasting equipment, which not only affects the sandblasting effect, but also increases energy consumption.

[0044] Based on this, the present application provides a sandblasting pneumatic control system.

[0045] Example 1

[0046] like Figure 1-Figure 7 As shown, this embodiment provides a sandblasting pneumatic control system, including:

[0047] Compressed air source 1;

[0048] An air distribution system 2, the air distribution system 2 comprising at least one air inlet and at least one air outlet; the air inlet of the air distribution system 2 is connected to the compressed air source 1, and the air outlet of the air distribution system 2 is connected to the proportional valve 3 through a pipeline;

[0049] The proportioning valve 3 is provided with a mixing chamber 31 , which is communicated with the outlet of the gas distribution system 2 and the sand supply device 10 . The mixing chamber 31 is provided with a sand outlet 32 ​​, which is communicated with the spray gun 4 .

[0050] In the control system, the compressed air source 1 is used to provide stable and pure compressed air as the power source for the sandblasting operation. The air distribution system 2 is used to adjust and control the pressure of the compressed air entering the proportional valve 3 to ensure that the compressed air can be evenly distributed to the mixing chamber 31 of the proportional valve 3. The compressed air and sand are mixed in the mixing chamber 31 and sprayed out from the sandblasting port to achieve uniform sandblasting of the enamel inner tank of the water heater.

[0051] Among them, the proportional valve 3 is the key link in the sandblasting operation, and a mixing chamber 31 is arranged inside it. In the mixing chamber 31, the compressed air is fully mixed with the sand particles to form a high-speed jet sand flow, which is connected to the spray gun 4 through the sand outlet 32 ​​and finally acts on the surface of the enamel inner tank. The spray gun 4, as the actuator of the sandblasting operation, sprays the mixed sand flow onto the surface of the enamel inner tank to achieve surface cleaning and roughening. The working process of the system is as follows: When the system is started, the compressed air source 1 provides stable compressed air to the gas distribution system 2. After being adjusted by the gas distribution system 2, the compressed air is evenly distributed to the branches where each spray gun 4 is located. When the spray gun 4 is operating, the solenoid valve 9 controls the air control valve 7 to open, so that the compressed air enters the mixing chamber 31 of the proportional valve 3. At the same time, the sand supply device 10 sends the sand into the mixing chamber 31 and mixes with the compressed air to form a sand flow. Finally, the sand flow is sprayed onto the surface of the enamel inner tank through the spray gun 4 to complete the sandblasting operation.

[0052] The control system achieves the mixing of air and sand in the proportional valve 3, changes the mixing mode of air and sand, increases the ejection force of sand, and enables the sandblasting operation to more thoroughly remove pollutants on the surface of the inner tank, improves the surface roughness, and thus enhances the adhesion between the coating and the steel surface. The air distribution system 2 optimizes the air supply pipeline structure and the air circuit control system, reduces the pressure loss of compressed air during the transmission process, and improves energy utilization efficiency. The pneumatic control system can also be used to achieve precise control of compressed air in each branch, so that the sandblasting operation can be carried out automatically, improving production efficiency and safety.

[0053] Example 2

[0054] This embodiment is improved on the basis of embodiment 1.

[0055] like Figure 1-Figure 7 As shown, in this embodiment, a pressure regulating valve 5 and a pilot valve 6 are also included which are connected to each other. The inlet of the pressure regulating valve 5 is connected to the compressed air source 1, and the outlet of the pilot valve 6 is connected to the air inlet of the gas distribution system 2.

[0056] The pressure regulating valve 5 enables the system to accurately regulate the air pressure from the compressed air source 1. This ensures that the air pressure received by the air distribution system 2 is stable and appropriate, thereby meeting the specific requirements of air pressure in different application scenarios.

[0057] The interconnected design of the pilot valve 6 and the pressure regulating valve 5 can achieve rapid response and regulation of air pressure. The pilot valve 6 usually has a small size and a fast response speed. It can respond quickly when the air pressure changes and adjust the air pressure in time through the pressure regulating valve 5. In addition, through the coordinated work of the pressure regulating valve 5 and the pilot valve 6, the system can more effectively resist external interference and air pressure fluctuations. This design helps to maintain the stability of air pressure, reduce equipment failures or performance degradation caused by unstable air pressure, and extend the service life of the equipment.

[0058] Specifically, the pilot valve 6 may include a valve body, a pilot gas inlet, a main gas inlet and outlet, a piston or a diaphragm, and a spring. The valve body is the main part of the pilot valve 6, which is used to accommodate other components and provide a connection interface. A flow channel is designed inside the valve body for the circulation of gas. The pilot gas inlet, the main gas inlet and the outlet are all arranged on the valve body, and the pilot gas inlet is used to receive the pilot gas from the control system. Changes in the pressure or flow of the pilot gas will trigger the action of the valve.

[0059] The main gas inlet is used to receive a large flow of gas that needs to be controlled, while the main gas outlet is used to output the controlled gas. Under the control of the pilot valve 6, the on-off state between the main gas inlet and outlet will change. The piston or diaphragm is a key moving component in the pilot valve 6. The piston or diaphragm will move according to the pressure change of the pilot gas, thereby changing the on-off state between the main gas inlet and outlet. The spring is usually used to provide a reset force to ensure that the piston or diaphragm can return to its initial position after the pilot gas pressure disappears, so that the on-off state between the main gas inlet and outlet is restored. In actual applications, the specific structure of the pilot valve 6 will vary according to the needs and design of the system. But in general, the working principle of the pilot valve 6 is to control a large flow of main gas by a small flow of pilot gas, thereby achieving precise control and rapid switching of the gas circuit.

[0060] Example 3

[0061] This embodiment is improved on the basis of embodiment 2.

[0062] In this embodiment, a specific implementation of the gas separation system 2 is provided. The details are as follows:

[0063] like Figure 1-Figure 7 As shown, the gas separation system 2 includes a first gas separation device 21 and a second gas separation device 22. The first gas separation device 21 is provided with a first gas inlet 211 and three first gas outlets 212; the second gas separation device 22 is provided with three second gas inlets 221 and a plurality of second gas outlets 222;

[0064] The first air inlet 211 on the first air distribution device 21 is connected to the compressed air source 1, any one of the first air outlets 212 is connected to the inlet of the pressure regulating valve 5, any two of the first air outlets 212 are respectively connected to one of the second air inlets 221 of the second air distribution device 22, and the outlet of the pilot valve 6 is connected to one of the second air inlets 221;

[0065] The second air outlet 222 is connected to the proportional valve 3 .

[0066] The present embodiment provides a detailed structure of an air distribution system 2. Among them, the air distribution system 2 realizes the graded distribution of the airflow through the first air distribution device 21 and the second air distribution device 22. The first air distribution device 21 preliminarily distributes the airflow from the compressed air source 1, and then further refines the distribution through the second air distribution device 22, ensuring the efficient use of the airflow. The air distribution system 2 is designed with multiple air outlets and air inlets, which can be flexibly configured according to actual needs. For example, different first air outlets 212 can be selected to be connected to the pressure regulating valve 5 as needed, or the connection method between the second air inlet 221 on the second air distribution device 22 and the first air outlet 212 can be adjusted.

[0067] The air distribution device of the present application is an air distribution bag, which is used to receive the airflow from the compressed air source 1 or the upper-level air distribution bag and distribute it to each branch. In this way, it can be ensured that each spray gun 4 or other pneumatic equipment can obtain sufficient compressed air supply. The air distribution bag also serves as a hub connecting the spray guns 4 of each branch and the pneumatic control elements. Through the flow channel design and valve control inside the air distribution bag, flexible switching and precise control of the air circuit can be achieved. At the same time, the air distribution bag can also convert the pressure and flow of compressed air into conditions suitable for sandblasting operations.

[0068] Example 4

[0069] This embodiment is improved on the basis of embodiment 3.

[0070] like Figure 1-Figure 7 As shown, in this embodiment, 3-6 second air outlets 222 are provided, wherein any one of the second air outlets 222 is externally connected to the air storage tank 8 through a pipeline.

[0071] In this embodiment, the gas storage tank 8 is provided with a gas storage outlet 81, and the gas storage outlet 81 is communicated with the mixing chamber 31 of the proportional valve 3. The second gas outlet 222 is externally connected to the gas storage tank 8 through a pipeline, which enables the control system to store excess gas without the need for continuous use of gas. This not only reduces the waste of gas, but also allows the stored gas to be reused when needed, thereby improving the overall efficiency and sustainability. The gas storage outlet 81 provided on the gas storage tank 8 is communicated with the mixing chamber 31 of the proportional valve 3, which enables the gas stored in the gas storage tank 8 to be introduced into the mixing chamber 31 when needed and mixed with the sand particles. In this way, the mixing ratio of the gas can be more easily controlled and adjusted to meet the requirements of uniform sandblasting.

[0072] In addition, since the gas storage tank 8 can store and reuse gas, the control system can continue to provide stable gas output when the gas supply is unstable or interrupted. This enhances the stability and reliability of the system and ensures the continuity of the sandblasting process.

[0073] Example 5

[0074] This embodiment is improved on the basis of embodiment 3.

[0075] like Figure 1-Figure 7 As shown, in this embodiment, a plurality of the second air outlets 222 are respectively connected to a mixing chamber 31 of the proportional valve 3, and an air control valve 7 is further provided between the second air outlet 222 and the proportional valve 3, and the air control valve 7 is controlled to be on and off by the solenoid valve 9. For example, five second air outlets 222 are provided on the second air distribution device 22, one of which is connected to the gas storage tank 8, and the other four second air outlets 222 are respectively connected to a mixing chamber 31 of the proportional valve 3; that is, four proportional valves 3 are provided, and four spray guns 4 are also provided, so as to realize the sandblasting operation on the inner tank of the water heater at the same time.

[0076] In this embodiment, the control system claimed in the present application realizes accurate control of the gas flow rate entering the mixing chamber 31 by combining the control of the gas control valve 7 and the electromagnetic valve 9. This control method can adjust the proportion of each gas flow according to the specific process requirements, so as to achieve the best gas mixing effect and ensure the quality and efficiency of the sandblasting operation. Using the electromagnetic valve 9 and the gas control valve 7 to control the on and off of the gas not only realizes the automatic operation, but also reduces the complexity and error of manual intervention.

[0077] Example 6

[0078] This embodiment is improved on the basis of embodiment 1.

[0079] like Figure 1-Figure 7As shown, in this embodiment, the first air distribution device 21 includes a shell 218, and an air storage chamber 213 is arranged in the shell 218. The first air inlet 211 and the first air outlet 212 are both arranged on the shell 218, and the first air inlet 211 and the first air outlet 212 are both connected to the air storage chamber 213.

[0080] By providing the gas storage chamber 213 in the housing 218 and connecting the first gas inlet 211 and the first gas outlet 212 thereto, the gas distribution device of the present application ensures uniform distribution of the gas in the gas distribution device. This design reduces eddy currents and turbulence during gas flow, improves the stability of gas distribution, and thus ensures the stability of subsequent processes.

[0081] In this embodiment, the housing 218 is provided with a safety valve 217 and a drain valve 214, the drain valve 214 is provided at the bottom of the housing 218, and both the safety valve 217 and the drain valve 214 are connected to the gas storage chamber 213. The safety valve 217 provided on the housing 218 can automatically open when the pressure in the gas storage chamber 213 is too high, release excess gas, and prevent equipment damage or accidents. At the same time, the setting of the drain valve 214 facilitates the timely discharge of the accumulated water in the gas storage chamber 213, prevents the moisture from causing adverse effects on the gas quality and equipment, and further enhances the safety and reliability of the system.

[0082] In this embodiment, a pressure regulating device is provided at the first air outlet 212 , and the pressure regulating device includes a pressure gauge 215 and a regulating valve 216 . The pressure gauge 215 is fixed on the shell 218 and communicated with the first air outlet 212 . The regulating valve 216 is used to adjust the size of the first air outlet 212 .

[0083] This embodiment provides a specific structure of the gas separation device. The setting of the pressure regulating device enables the operator to monitor the gas pressure in real time and adjust the size of the first gas outlet 212 as needed to achieve accurate control of the gas pressure. This design not only improves the accuracy of the process, but also facilitates timely discovery and handling of potential problems.

[0084] Example 7

[0085] This embodiment provides a sandblasting device, including a sandblasting body, on which the sandblasting pneumatic control system as described above is provided.

[0086] like Figure 1-Figure 7As shown, specifically, a sandblasting chamber is provided in the sandblasting body of the sandblasting equipment, and the sandblasting chamber is used to accommodate the inner tank of the water heater and perform sandblasting operations therein. The sandblasting chamber is usually made of wear-resistant materials, such as stainless steel or special alloys, to resist the impact of sand particles. A spray gun 4 is provided in the sandblasting chamber, and the spray gun 4 is connected to the proportional valve 3 of the above-mentioned pneumatic control system. A sand conveying system is also provided in the sandblasting chamber, which is responsible for conveying the sandblasting medium from the storage container to the proportional valve 3, and the sand conveying is usually achieved by pneumatic conveying or mechanical conveying. A control system is also included, which is the brain of the sandblasting equipment and is responsible for controlling various parameters in the sandblasting process, such as air pressure, sand flow rate and sandblasting time. The control system can be manual or automatic to improve the accuracy and repeatability of the operation.

[0087] The equipment is used for sandblasting the inner tank of the water tank during the production of the heater. Since the sandblasting pneumatic control system has efficient air supply and sandblasting capabilities, the sandblasting equipment can quickly complete the sandblasting of the inner tank of the water tank, which can reduce the time of sandblasting operations and thus improve the overall production efficiency. It can also ensure the stability of air pressure and sand flow during the sandblasting process, thereby ensuring the quality of sandblasting.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0089] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0090] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sandblasting pneumatic control system, characterized in that: include: A compressed air source (1); An air distribution system (2), the air distribution system (2) comprising at least one air inlet and at least one air outlet; the air inlet of the air distribution system (2) is connected to the compressed air source (1), and the air outlet of the air distribution system (2) is connected to a proportional valve (3) via a pipeline; The proportional valve (3) is provided with a mixing chamber (31), the mixing chamber (31) is communicated with the outlet of the gas distribution system (2), the mixing chamber (31) is also communicated with the sand supply device (10), and the mixing chamber (31) is provided with a sand outlet (32), and the sand outlet (32) is communicated with the spray gun (4).

2. The sandblasting pneumatic control system according to claim 1, characterized in that: It also includes a pressure regulating valve (5) and a pilot valve (6) which are connected to each other, wherein the inlet of the pressure regulating valve (5) is connected to the compressed air source (1), and the outlet of the pilot valve (6) is connected to the air inlet of the air distribution system (2).

3. The sandblasting pneumatic control system according to claim 2, characterized in that: The gas separation system (2) comprises a first gas separation device (21) and a second gas separation device (22); the first gas separation device (21) is provided with a first gas inlet (211) and three first gas outlets (212); the second gas separation device (22) is provided with three second gas inlets (221) and a plurality of second gas outlets (222); wherein the first air inlet (211) on the first air distribution device (21) is in communication with the compressed air source (1), any one of the first air outlets (212) is in communication with the inlet of the pressure regulating valve (5), any two of the first air outlets (212) are respectively in communication with one of the second air inlets (221) of the second air distribution device (22), and the outlet of the pilot valve (6) is in communication with one of the second air inlets (221); The second air outlet (222) is connected to the proportional valve (3).

4. The sandblasting pneumatic control system according to claim 3, characterized in that: The number of the second air outlets (222) is 3 to 6, wherein any one of the second air outlets (222) is connected to an external air storage tank (8) via a pipeline.

5. The sandblasting pneumatic control system according to claim 4, characterized in that: The gas storage tank (8) is provided with a gas storage outlet (81), and the gas storage outlet (81) is communicated with the mixing chamber (31) of the proportional valve (3).

6. The sandblasting pneumatic control system according to claim 4, characterized in that: The plurality of second air outlets (222) are respectively connected to a mixing chamber (31) of the proportional valve (3); an air control valve (7) is also provided between the second air outlet (222) and the proportional valve (3); the air control valve (7) is controlled to be on and off by a solenoid valve (9).

7. The sandblasting pneumatic control system according to any one of claims 3 to 6, characterized in that: The first air distribution device (21) comprises a shell (218), an air storage chamber (213) is arranged in the shell (218), the first air inlet (211) and the first air outlet (212) are both arranged on the shell (218), and the first air inlet (211) and the first air outlet (212) are both connected to the air storage chamber (213).

8. The sandblasting pneumatic control system according to claim 7, characterized in that: The housing (218) is provided with a safety valve (217) and a drain valve (214); the drain valve (214) is arranged at the bottom of the housing (218); and both the safety valve (217) and the drain valve (214) are in communication with the air storage chamber (213).

9. The sandblasting pneumatic control system according to claim 7, characterized in that: A pressure regulating device is provided at the first air outlet (212), the pressure regulating device comprising a pressure gauge (215) and a regulating valve (216); the pressure gauge (215) is fixed on the housing (218) and is in communication with the first air outlet (212); the regulating valve (216) is used to adjust the size of the first air outlet (212).

10. A sandblasting device, characterized in that: It comprises a sandblasting body, on which is arranged a sandblasting pneumatic control system as described in any one of claims 1 to 9.

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