Sand blasting pneumatic control system and sand blasting equipment

Abstract

The utility model 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 utility model relates to the technical field of water heater production, 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 tank liner is a crucial step in the manufacturing process. Prior to enamelling, the liner surface must undergo rigorous surface treatment to ensure that contaminants such as oxides, rust, welding slag, and oil stains on the steel plate are thoroughly removed, achieving a desired level of flatness and roughness. This step is crucial as it directly impacts the adhesion of the coating to the steel surface, which in turn determines the tank's resistance to corrosion and overall service life. Traditional surface treatment methods suffer from shortcomings in efficiency, automation, and sandblasting effectiveness. In particular, traditional pneumatic sandblasting machines use pressurized air-sand mixing within a pressure tank. This method produces poor surface treatment results for the enameled liner of the air-energy water heater, often failing to achieve sufficient surface roughness and flatness, thus compromising the quality of the subsequent coating. Furthermore, limitations in the air supply piping structure and control system of traditional sandblasting equipment result in significant pressure loss of compressed air as it passes through the equipment, impairing blasting effectiveness and increasing energy consumption.

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

[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 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 proportional 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, which is communicated with the spray gun.

[0009] In this control system, the compressed air source provides stable, pure compressed air, serving as the power source for the sandblasting operation. The air distribution system regulates and controls the compressed air pressure entering the proportional valve, ensuring even distribution of the compressed air into the valve's mixing chamber. The compressed air and abrasive mix in the mixing chamber and are ejected from the blasting port, achieving uniform sandblasting of the water heater's enamel interior.

[0010] The proportional valve is a key step in the sandblasting process, housing a mixing chamber. Within this chamber, compressed air and abrasive material mix thoroughly, forming a high-speed jet of sand. This jet is connected to the spray gun through the sand outlet and ultimately acts on the surface of the enameled liner. The spray gun, acting as the actuator for the sandblasting operation, sprays the mixed sand stream onto the surface of the enameled liner, achieving surface cleaning and roughening. The system operates as follows: When the system is started, a compressed air source provides a stable supply of compressed air to the air distribution system. After regulation by the air distribution system, the compressed air is evenly distributed to the branches where the various spray guns are located. During spray gun operation, the solenoid valve controls the opening of the air control valve, allowing compressed air to enter the mixing chamber of the proportional valve. Simultaneously, the sand supply device delivers abrasive material into the mixing chamber, where it mixes with the compressed air to form a sand stream. Finally, the sand stream is ejected through the spray gun onto the surface of the enameled liner, completing the sandblasting operation.

[0011] This control system achieves a mixture of air and sand within a proportional valve, changing the mixing pattern and increasing the force of the sand jet. This allows the sandblasting operation to more thoroughly remove contaminants from the inner liner surface, improve surface roughness, and thus enhance the adhesion of the coating to the steel surface. The air distribution system optimizes the air supply pipeline structure and air path control system, reducing pressure loss during compressed air transmission and improving energy efficiency. A pneumatic control system can also be used to precisely control the compressed air in each branch, enabling automated sandblasting operations and 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 gas distribution system.

[0013] The pressure regulating valve enables the system to precisely regulate the 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 air pressure requirements of different application scenarios.

[0014] The interconnected design of the pilot valve and pressure regulating valve enables rapid response and regulation of air pressure. The pilot valve is typically compact and responsive, enabling it to react quickly to changes in air pressure and adjust the pressure promptly through the pressure regulating valve. Furthermore, the coordinated operation of the pressure regulating valve and pilot valve makes the system more resilient to external interference and pressure fluctuations. This design helps maintain stable air pressure and reduces equipment failure or performance degradation caused by unstable air pressure.

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

[0016] The first air inlet of the first air distributor 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 distributor, 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] This embodiment provides a detailed structure of an air distribution system. Among them, the air distribution system realizes the hierarchical 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 as needed, or the connection method of 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 gas 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 connected to the mixing chamber of the proportional valve. The second gas outlet is 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 connected to 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, because the gas storage tank can store and reuse gas, the control system can continue to provide stable gas output even 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.

[0022] In a preferred technical solution of the present invention, the plurality of 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 air-controlled valve is controlled on and off by a solenoid valve.

[0023] In this embodiment, the claimed control system, combining the control of air-controlled and solenoid valves, achieves precise control of the gas flow rate entering the mixing chamber. This control method adjusts the ratio of the various airflows according to specific process requirements, thereby achieving optimal gas mixing and ensuring the quality and efficiency of the sandblasting operation. Using solenoid valves and air-controlled valves to control the flow of gas not only enables automated operation but also reduces the complexity and errors associated with 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 provided in the shell, the first air inlet and the first air outlet are both provided 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 within the housing and connecting both the first gas inlet and the first gas outlet thereto, the gas distributor of the present application ensures uniform distribution of gas within the gas distributor. This design reduces eddy currents and turbulence during gas flow, improves gas distribution stability, and thus ensures stable execution of subsequent processes.

[0026] In a preferred embodiment of the present invention, the housing is equipped with a safety valve and a drain valve, the drain valve being located at the bottom of the housing and both communicating with the gas storage chamber. The safety valve automatically opens when pressure in the gas storage chamber is excessive, releasing excess gas and preventing equipment damage or accidents. The drain valve also facilitates the timely removal of accumulated water from the gas storage chamber, preventing it from adversely affecting gas quality and equipment, 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 detailed structure for a gas separator. The provision of a pressure regulating device allows operators to monitor gas pressure in real time and adjust the size of the first gas outlet as needed to achieve precise control of gas pressure. This design not only improves process accuracy but also facilitates the timely detection and resolution of potential problems.

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

[0030] The beneficial effects of the utility model are:

[0031] The utility model provides a pneumatic control system for sandblasting, comprising a compressed air source and an air distribution system. The air distribution system includes at least one air inlet and at least one air outlet. The air distribution system's air inlet is connected to the compressed air source, and the air distribution system's air outlet is connected to a proportional valve via a pipeline. The proportional valve is provided with a mixing chamber, which is connected to the outlet of the air distribution system and to a sand supply device. The mixing chamber is provided with a sand outlet, which is connected to a spray gun. Conventional sandblasting equipment typically controls sandblasting by pressurizing a pressure tank, a method that easily causes pressure loss during pressure transmission and conversion. This control system, however, utilizes a novel air circuit design to directly supply air to the spray gun, eliminating intermediate links and effectively reducing air pressure loss during transmission. This allows the spray gun circuit to obtain more stable and sufficient air pressure, ensuring smoother sand delivery from the spray gun during the spraying process, improving the uniformity and force of the sand ejection, and ensuring effective sandblasting. This pneumatic control system for sandblasting is used in water heater production processes to improve the sandblasting quality of the water heater tank liner, contributing to improved coating quality and extending the service life of the water heater.

[0032] The present application also provides a sandblasting device including the aforementioned sandblasting pneumatic control system. This device can be used to sandblast the inner liner of a water tank during the production of a heater. Because the sandblasting pneumatic control system has efficient air supply and sandblasting capabilities, the sandblasting device can quickly complete the sandblasting of the inner liner of the water tank, reducing sandblasting time and thereby improving overall production efficiency. Furthermore, the device can ensure the stability of air pressure and abrasive flow during the sandblasting process, thereby guaranteeing sandblasting quality. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0037] Figure 5 It is a structural diagram of the second gas separation device provided in the embodiment of the present utility model;

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

[0039] Figure 7 It is a structural schematic diagram of the gas storage tank provided in the embodiment of the present utility model.

[0040] Reference numerals:

[0041] 1. Compressed air source; 2. Air distribution system; 21. First air distributor; 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. Housing; 22. Second air distributor; 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 tank; 81. Air storage outlet; 9. Solenoid valve; 10. Sand supply device; DETAILED DESCRIPTION

[0042] The following describes preferred embodiments of the present invention in more detail with reference to the accompanying drawings. Although 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. Rather, 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 tank liner is a crucial step in the manufacturing process. Prior to enamelling, the liner surface must undergo rigorous surface treatment to ensure that contaminants such as oxides, rust, welding slag, and oil stains on the steel plate are thoroughly removed, achieving a desired level of flatness and roughness. This step is crucial as it directly impacts the adhesion of the coating to the steel surface, which in turn determines the tank's resistance to corrosion and overall service life. Traditional surface treatment methods suffer from shortcomings in efficiency, automation, and sandblasting effectiveness. In particular, traditional pneumatic sandblasting machines use pressurized air-sand mixing within a pressure tank. This method produces poor surface treatment results for the enameled liner of the air-energy water heater, often failing to achieve sufficient surface roughness and flatness, thus compromising the quality of the subsequent coating. Furthermore, limitations in the air supply piping structure and control system of traditional sandblasting equipment result in significant pressure loss of compressed air as it passes through the equipment, impairing blasting effectiveness and increasing 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 proportional 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 this control system, compressed air source 1 provides stable, pure compressed air, serving as the power source for sandblasting. Air distribution system 2 regulates and controls the compressed air pressure entering proportional valve 3, ensuring even distribution of the compressed air into mixing chamber 31 of proportional valve 3. The compressed air and sand are mixed in mixing chamber 31 and ejected from the sandblasting port, achieving uniform sandblasting of the water heater's enamel interior.

[0051] Among them, the proportional valve 3 is a key link in the sandblasting operation, and a mixing chamber 31 is provided inside it. In the mixing chamber 31, the compressed air and sand particles are fully mixed to form a high-speed sand flow, which is connected to the spray gun 4 through the sand outlet 32 ​​and finally acts on the surface of the enameled inner tank. The spray gun 4 serves as the actuator of the sandblasting operation, spraying the mixed sand flow onto the surface of the enameled 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 air distribution system 2. After adjustment by the air 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, allowing compressed air to enter the mixing chamber 31 of the proportional valve 3. At the same time, the sand supply device 10 sends sand into the mixing chamber 31, where it mixes with the compressed air to form a sand flow. Finally, the sand flow is sprayed onto the surface of the enameled inner tank through the spray gun 4, completing the sandblasting operation.

[0052] This control system achieves a mixing of air and sand within proportional valve 3, changing the mixing pattern and increasing the force of the sand jet. This allows the sandblasting process to more thoroughly remove contaminants from the inner liner surface, improve surface roughness, and thus enhance the adhesion of the coating to the steel surface. The air distribution system 2 optimizes the air supply pipeline structure and air path control system, reducing pressure loss during compressed air transmission and improving energy efficiency. A pneumatic control system also enables precise control of compressed air in each branch, enabling automated sandblasting operations and 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 further included that 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 air pressure requirements of different application scenarios.

[0057] The interconnected design of the pilot valve 6 and the pressure-regulating valve 5 enables rapid response and regulation of air pressure. The pilot valve 6 is typically compact and responsive, enabling it to react quickly to changes in air pressure and promptly adjust the air pressure through the pressure-regulating valve 5. Furthermore, the coordinated operation of the pressure-regulating valve 5 and the pilot valve 6 makes the system more resilient to external interference and pressure fluctuations. This design helps maintain stable air pressure, reducing equipment failures and performance degradation caused by unstable air pressure, and extending equipment life.

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

[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 after the pilot gas pressure disappears, the piston or diaphragm can return to its initial position, 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 path.

[0060] Example 3

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

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

[0063] like Figure 1-Figure 7 As shown, the gas distribution system 2 includes a first gas distribution device 21 and a second gas distribution device 22. The first gas distribution device 21 is provided with a first gas inlet 211 and three first gas outlets 212; the second gas distribution device 22 is provided with three second gas inlets 221 and multiple 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] This embodiment provides a detailed structure of an air distribution system 2. Among them, the air distribution system 2 realizes the hierarchical 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 air flow 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 are 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 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 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 even 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, multiple second air outlets 222 are respectively connected to the mixing chamber 31 of a proportional valve 3. An air control valve 7 is further provided between the second air outlet 222 and the proportional valve 3. The air control valve 7 is controlled on and off by the solenoid valve 9. For example, the second air distribution device 22 is provided with five second air outlets 222, one of which is connected to the air storage tank 8, and the other four second air outlets 222 are respectively connected to the mixing chamber 31 of a proportional valve 3; that is, four proportional valves 3 are provided, and four spray guns 4 are also provided, so that the inner tank of the water heater can be sandblasted simultaneously.

[0076] In this embodiment, the control system claimed in this application achieves precise control of the gas flow rate entering the mixing chamber 31 by combining the control of the air-controlled valve 7 and the solenoid valve 9. This control method can adjust the ratio of the various airflows according to specific process requirements, thereby achieving optimal gas mixing and ensuring the quality and efficiency of the sandblasting operation. Using the solenoid valve 9 and the air-controlled valve 7 to control the on-off flow of gas not only achieves automated operation but also reduces the complexity and errors associated with 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 provided in the shell 218. The first air inlet 211 and the first air outlet 212 are both provided 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 a gas storage chamber 213 within the housing 218 and connecting both the first gas inlet 211 and the first gas outlet 212 thereto, the gas distributor of the present application ensures uniform distribution of gas within the gas distributor. This design reduces eddy currents and turbulence during gas flow, improves gas distribution stability, and thus ensures stable execution 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 located at the bottom of the housing 218 and is in communication with the gas storage chamber 213. The safety valve 217 provided on the housing 218 automatically opens when the pressure within the gas storage chamber 213 is excessive, releasing excess gas and preventing equipment damage or accidents. The drain valve 214 also facilitates the timely removal of accumulated water within the gas storage chamber 213, preventing it from adversely affecting gas quality and equipment, further enhancing 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 detailed structure for a gas separation device. The provision of a pressure regulating device allows the operator to monitor the gas pressure in real time and adjust the size of the first gas outlet 212 as needed to achieve precise control of the gas pressure. This design not only improves process accuracy but also facilitates the timely detection and resolution 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 inside it. 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. The sand conveying is usually achieved by pneumatic conveying or mechanical conveying. A control system is also included. The control system 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] This equipment is used for sandblasting the inner liner of water tanks during the production of hot air heaters. Due to the efficient air supply and sandblasting capabilities of the sandblasting pneumatic control system, this equipment can quickly complete the sandblasting of the water tank inner liner, reducing sandblasting time and thus improving overall production efficiency. It also ensures the stability of air pressure and abrasive flow during the sandblasting process, thereby ensuring sandblasting quality.

[0088] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. 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 figures. For example, if the device in the 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 merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A sandblasting pneumatic control system, characterized in that: include: 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) that 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 gas 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 second air outlets (222) are provided in 3-6 numbers, wherein any one of the second air outlets (222) is externally connected to the gas 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 communicated with a mixing chamber (31) of a proportional valve (3); an air control valve (7) is further 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 gas distribution device (21) comprises a shell (218), an air storage chamber (213) is provided in the shell (218), the first air inlet (211) and the first air outlet (212) are both provided on the shell (218), and the first air inlet (211) and the first air outlet (212) are both communicated with 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 provided at the bottom of the housing (218). 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 communicated 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 main body, on which is provided a sandblasting pneumatic control system according to any one of claims 1 to 9.

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