Piston air compressor

Abstract

This invention discloses a piston-type air compressor, relating to the field of air compressor technology. The invention includes an upper support plate, on the top of which a piston-type compression cylinder and a drag motor are fixedly mounted. The output end of the piston-type compression cylinder and the input end of the drag motor are driven by the same drag pulley assembly. A first control valve assembly is fixedly mounted at the exhaust port of the piston-type compression cylinder, and an outlet pipe is fixedly mounted at one end of the first control valve assembly. By setting up an air-floating support frame, this invention allows the first control valve assembly to switch pathways, enabling the high-pressure gas inside the pressure tank to be delivered to each suspended air cylinder. The air pressure then drives the permanent magnet to continue rising, forming an air-floating support, thus breaking the rigid connection between the upper support plate and the lower support plate. At this time, the vibration generated by the drag motor driving the piston-type compression cylinder through the drag pulley assembly will not be directly transmitted to the pressure tank below, effectively improving the stability and safety of the gas stored in the pressure tank.

Description

Technical Field

[0001] This invention relates to the field of air compressor technology, and more specifically to a piston air compressor. Background Technology

[0002] The main function of an air compressor is to convert mechanical energy into gas pressure energy. Among them, the piston air compressor compresses gas by reciprocating the piston. The working process mainly involves the piston moving downward, the intake valve opening to draw in gas and compress it, the piston moving upward, the double valve closing, the gas being compressed and pressurized, the gas pressure exceeding the discharge pressure, and the exhaust valve opening to discharge the gas. Piston air compressors have a simple structure, low purchase cost, and low maintenance technical requirements, making them outstanding in terms of cost-effectiveness in small repair shops and intermittent gas usage scenarios. However, the main unit has relatively large vibration and noise.

[0003] Vibration of existing piston air compressors is transmitted to the pressure tank. Storage safety depends on the service life of vibration damping components and regular inspection. When the vibration amplitude exceeds the safety threshold, the vibration will not only cause the output air pressure accuracy to be substandard, but also increase the probability of false triggering of the pressure tank safety valve. At the same time, long-term abnormal vibration will cause fatigue microcracks in the weld seams and flange connections of the pressure tank inlet and outlet, accelerate the fatigue of the tank metal, reduce the pressure redundancy, and increase the risk of gas safety storage. Therefore, a piston air compressor is proposed. Summary of the Invention

[0004] The purpose of this invention is to address the problem that vibrations from existing piston air compressor main units are transmitted to the pressure tank, and that storage safety depends on the service life of vibration damping components and regular inspections. This invention provides a piston air compressor.

[0005] To achieve the above objectives, the present invention specifically adopts the following technical solution: A piston air compressor includes an upper support plate. A piston compression cylinder and a drive motor are fixedly mounted on the top of the upper support plate. The output end of the piston compression cylinder and the input end of the drive motor are driven by the same drive pulley assembly. A first control valve assembly is fixedly mounted on the exhaust port of the piston compression cylinder. An air outlet pipe is fixedly mounted on one end of the first control valve assembly. A pressure tank is disposed below the upper support plate. A lower support plate is fixedly mounted on the top of the pressure tank. The upper support plate is placed on top of the lower support plate. A receiving groove is formed on the top of the lower support plate. A transmission air pipe is fixedly mounted inside the receiving groove. The bottom end of the transmission air pipe is connected to the inside of the pressure tank. The top end of the transmission air pipe is connected to the first control valve assembly. An air flotation support frame for air flotation support of the upper support plate is provided on the lower support plate.

[0006] Furthermore, the air flotation support frame includes multiple suspension air cylinders fixedly installed on the top of both sides of the lower support plate. Multiple suspension brackets corresponding to the positions of the suspension air cylinders are fixedly installed on both sides of the upper support plate. Permanent magnets adapted to the suspension air cylinders are fixedly installed at the bottom of each suspension bracket. The multiple permanent magnets are located inside the multiple suspension air cylinders. An arc-shaped air box is fixedly installed on the top of the pressure tank. A second control valve assembly is fixedly installed on the arc-shaped air box and is connected to the interior of the pressure tank. Air supply pipes are fixedly installed at both ends of the arc-shaped air box. One end of each air supply pipe extends to both sides of the top of the lower support plate. Air supply holes are fixedly installed on one side of the bottom of each suspension air cylinder and are connected to the air supply pipes.

[0007] Furthermore, a conical rubber ring is fixedly sleeved at the top of each of the suspended air cylinders, and a sealing rubber ring adapted to the conical rubber ring is fixedly sleeved at the bottom of the suspension frame.

[0008] Furthermore, a thin-walled water tank is fixedly installed on the top of the upper support plate near the side of the drag pulley assembly. A circulation pipe is fixedly installed on one side of the thin-walled water tank. The inlet end of the circulation pipe is connected to the interior of the thin-walled water tank. A water supply pipe is fixedly installed on the outlet end of the circulation pipe. Two circulation pipes are fixedly installed at one end of the water supply pipe. A cooling sleeve is fixedly fitted to the end of the air supply pipe near the arc-shaped air box. A cooling sleeve is fitted to one end of each of the two circulation pipes and a common return pipe is fixedly installed. The section of the circulation pipe inside the cooling sleeve is spirally distributed. The return pipe is fixedly installed on the top of the upper support plate and connected to the thin-walled water tank.

[0009] Furthermore, a suspension box is fixedly installed on both sides of the bottom of the lower support plate, and multiple electromagnets are fixedly installed inside the suspension box. The multiple electromagnets are located at the bottom of the multiple levitation air cylinders, and the polarity of the electromagnets is the same as that of the permanent magnet.

[0010] Furthermore, airbags are fixedly installed on both sides of the lower support plate, and air distribution pipes are fixedly installed on one side of the air supply pipe, with the two air distribution pipes respectively connected to the two airbags.

[0011] Furthermore, the thin-walled water tank has multiple evenly distributed air passages on its side wall.

[0012] Furthermore, a plurality of evenly distributed buffer rubber pads are fixedly installed on the top of the lower support plate.

[0013] The beneficial effects of this invention are as follows: 1. By setting up an air-floating support frame, the first control valve group switches the passage, allowing the high-pressure gas inside the pressure tank to be delivered to each suspended air cylinder. The air pressure drives the permanent magnet to continue to rise, forming an air-floating support. This disconnects the rigid connection between the upper support plate and the lower support plate. At this time, the vibration generated by the drag motor driving the piston-type compression cylinder through the drag pulley group will not be directly transmitted to the pressure tank below, effectively improving the stability and safety of the gas stored in the pressure tank. 2. This invention uses electromagnets so that, in the initial state, each permanent magnet is inserted into the levitation air cylinder, allowing the upper support plate and its upper equipment to be stably placed on the pressure tank and lower support plate. When the equipment is started, each electromagnet is energized synchronously, repelling the permanent magnets of the same pole, providing levitation magnetic force, driving the upper support plate to rise a certain distance, so that the air inlet is no longer blocked by the permanent magnets, and the levitation air cylinder is connected to the air supply passage such as the air supply pipe, which facilitates subsequent air supply and levitation operations, and at the same time improves the stability of the air bearing when starting. 3. By setting a sealing rubber ring, after the air buoy support is formed, each electromagnet is de-energized, and the permanent magnet that loses its magnetic support will drop a certain distance, thereby pressing the sealing rubber ring on the top of the conical rubber ring and sealing the opening at the top of the suspension air cylinder. At this time, the second control valve group disconnects the passage, and the gas remains inside the closed suspension air cylinder to continue to provide support. The conical rubber ring and the sealing rubber ring can not only act as vibration damping components, but also effectively reduce the leakage of internal high-pressure gas. 4. By setting up a cooling jacket, when the pressure tank delivers gas to the suspended gas cylinder, the circulation pipe draws cooling water from the thin-walled water tank and delivers it to the circulation pipes on both sides through the water supply pipe. This allows the cooling water to have a high cooling area in the spiral pipe inside the cooling jacket, thereby effectively cooling the high-pressure gas delivered inside the gas supply pipe. This prevents the gas from overflowing from the opening of the suspended gas cylinder during the initial gas delivery, which could cause low-temperature burns to personnel. At the same time, it avoids the uncooled gas from affecting the magnetism of the permanent magnet. Attached Figure Description

[0014] Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a three-dimensional structural diagram of the cooperation between the upper support plate and the piston-type compression cylinder of the present invention; Figure 3 This is the present invention. Figure 2 Schematic diagram of the structure at point A in the middle; Figure 4 This is a three-dimensional structural diagram of the pressure tank and the lower support plate of the present invention. Figure 5 This is the present invention. Figure 4 Schematic diagram of the structure at point B; Figure 6 This is a schematic diagram of the internal three-dimensional structure of the suspension box of the present invention; Figure 7 This is a schematic diagram of the internal three-dimensional structure of the suspension air cylinder of the present invention; Figure 8 This is a schematic diagram of the internal three-dimensional structure of the cooling jacket of the present invention; Reference numerals: 1. Upper support plate; 2. Piston-type compression cylinder; 3. Traction motor; 4. Traction pulley assembly; 5. First control valve assembly; 6. Air outlet pipe; 7. Pressure tank; 8. Lower support plate; 801. Receiving tank; 9. Transmission air pipe; 10. Suspension air cylinder; 1001. Air inlet; 11. Suspension frame; 12. Permanent magnet; 13. Arc-shaped air box; 14. Second control valve assembly; 15. Air inlet pipe; 16. Conical rubber ring; 17. Sealing rubber ring; 18. Thin-walled water tank; 1801. Air vent; 19. Circulation pipe; 20. Cooling jacket; 21. Return pipe; 22. Air distribution pipe; 23. Airbag; 24. Buffer rubber pad; 25. Suspension box; 26. Electromagnet; 27. Water supply pipe. Detailed Implementation

[0015] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0016] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0017] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0018] In the description of the embodiments of the present invention, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0019] like Figures 1 to 8As shown, a piston air compressor includes an upper support plate 1, such as... Figure 1 , Figure 2 , Figure 4 As shown, specifically, a piston-type compressor cylinder 2 and a traction motor 3 are fixedly installed on the top of the upper support plate 1. The output end of the piston-type compressor cylinder 2 and the input end of the traction motor 3 are driven by the same traction pulley group 4. A first control valve group 5 is fixedly installed at the exhaust port of the piston-type compressor cylinder 2. An air outlet pipe 6 is fixedly installed at one end of the first control valve group 5. A pressure tank 7 is provided below the upper support plate 1. A lower support plate 8 is fixedly installed on the top of the pressure tank 7. The upper support plate 1 is placed on top of the lower support plate 8. A receiving groove 801 is opened on the top of the lower support plate 8. A transmission air pipe 9 is fixedly installed inside the receiving groove 801. The bottom end of the transmission air pipe 9 is connected to the inside of the pressure tank 7, and the top end of the transmission air pipe 9 is connected to the first control valve group 5. Figure 6 As shown, suspension boxes 25 are fixedly installed on both sides of the bottom of the lower support plate 8. Multiple electromagnets 26 are fixedly installed inside the suspension boxes 25. The multiple electromagnets 26 are located at the bottom of multiple suspension air cylinders 10 respectively. The polarity of the electromagnets 26 is the same as that of the permanent magnet 12.

[0020] More specifically, by setting up electromagnets 26, each permanent magnet 12 is inserted into the levitation air cylinder 10 in the initial state, so that the upper support plate 1 and its upper equipment are stably placed on the pressure tank 7 and the lower support plate 8. When the equipment is started, each electromagnet 26 is energized synchronously, repelling the permanent magnets 12 of the same pole, providing levitation magnetic force, driving the upper support plate 1 to rise a certain distance, so that the air replenishment hole 1001 is no longer blocked by the permanent magnets 12, and the levitation air cylinder 10 is connected to the air supply passage such as the air replenishment pipe 15, which facilitates the subsequent air supply levitation operation, and at the same time improves the stability of the air bearing when it starts.

[0021] The lower support plate 8 is equipped with an air-bearing support frame for air-bearing support of the upper support plate 1, such as... Figure 3 , Figure 4 , Figure 5 As shown, specifically, the air flotation support frame includes multiple levitation air cylinders 10 fixedly installed on the top of both sides of the lower support plate 8. Multiple suspension brackets 11, corresponding one-to-one with the positions of the levitation air cylinders 10, are fixedly installed on both sides of the upper support plate 1. Permanent magnets 12, adapted to the levitation air cylinders 10, are fixedly installed at the bottom of each suspension bracket 11. The multiple permanent magnets 12 are located inside the multiple levitation air cylinders 10. An arc-shaped air box 13 is fixedly installed on the top of the pressure tank 7. A second control valve assembly 14 is fixedly installed on the arc-shaped air box 13, and the second control valve assembly 14 is connected to the interior of the pressure tank 7. Air supply pipes 15 are fixedly installed at both ends of the arc-shaped air box 13, with one end of each air supply pipe extending to both sides of the top of the lower support plate 8. Figure 7As shown, each of the bottom sides of the suspended air cylinder 10 is fixedly equipped with an air supply hole 1001, and the air supply hole 1001 is connected to the air supply pipe 15.

[0022] In this embodiment, the permanent magnet 12 has an inverted frustum structure that is wider at the top and narrower at the bottom. The internal shape of the suspension air cylinder 10 is adapted to the permanent magnet 12. The permanent magnet 12 is divided into a metal shell covering the outside and a permanent magnet core placed inside. A pressure gauge is provided on the second control valve group 14 to monitor the air pressure of the arc-shaped air box 13, the air supply pipe 15 and the air passage where the suspension air cylinder 10 is located.

[0023] More specifically, by setting up an air-floating support frame, after the air path is connected, the first control valve group 5 switches the passage, allowing a portion of the high-pressure gas stored inside the pressure tank 7 to be released and transported to the arc-shaped air box 13, and then transported to each suspended air cylinder 10 through the air supply pipes 15 on both sides. The air pressure drives the permanent magnet 12 to continue to rise, so that the permanent magnet 12 and the suspended air cylinder 10 are in an inserted state but no longer in contact. The air pressure forms an air-floating support, which disconnects the rigid connection between the upper support plate 1 and the lower support plate 8. At this time, the vibration generated by the drag motor 3 driving the piston-type compression cylinder 2 through the drag pulley group 4 will not be directly transmitted to the pressure tank 7 below, effectively improving the stability and safety of the gas stored in the pressure tank 7.

[0024] like Figure 3 , Figure 5 As shown, specifically, a conical rubber ring 16 is fixedly sleeved at the top of each suspension air cylinder 10, and a sealing rubber ring 17 adapted to the conical rubber ring 16 is fixedly sleeved at the bottom of the suspension frame 11.

[0025] More specifically, by setting a sealing rubber ring 17, after the air buoyancy support is formed, each electromagnet 26 is de-energized, and the permanent magnet 12, which loses its magnetic support, will descend a certain distance, thereby causing the sealing rubber ring 17 to press against the top of the conical rubber ring 16, sealing the opening at the top of the suspension air cylinder 10. At this time, the second control valve group 14 disconnects the passage, and the gas remains inside the closed suspension air cylinder 10 to continue to provide support. The conical rubber ring 16 and the sealing rubber ring 17 can both act as vibration damping components and effectively reduce the leakage of internal high-pressure gas.

[0026] like Figure 4 , Figure 5 As shown, specifically, airbags 23 are fixedly installed on both sides of the lower support plate 8, and air distribution pipes 22 are fixedly installed on one side of the air supply pipe 15. The two air distribution pipes 22 are respectively connected to the two airbags 23.

[0027] More specifically, by setting up an airbag 23, after the upper support plate 1 is raised, there is a gap between the upper support plate 1 and the lower support plate 8 that allows the upper support plate 1 to vibrate. When the air supply pipe 15 supplies air into the suspended air cylinder 10, some of the high-pressure gas will be transported to the airbag 23 through the air distribution pipe 22, causing the airbag 23 to expand, thereby filling the gap between the upper support plate 1 and the lower support plate 8, limiting the vibration amplitude of the upper support plate 1, and preventing the upper support plate 1 from vibrating excessively and directly impacting the side wall of the lower support plate 8.

[0028] like Figure 1 , Figure 2 , Figure 4 As shown, specifically, a thin-walled water tank 18 is fixedly installed on the top of the upper support plate 1 near the side of the drag pulley assembly 4. A circulation pipe 19 is fixedly installed on one side of the thin-walled water tank 18. The inlet end of the circulation pipe 19 is connected to the inside of the thin-walled water tank 18. A water supply pipe 27 is fixedly installed on the outlet end of the circulation pipe 19. Two circulation pipes 19 are fixedly installed at one end of the water supply pipe 27. A cooling sleeve 20 is fixedly sleeved on the end of the air supply pipe 15 near the arc-shaped air box 13. A cooling sleeve 20 is fixedly sleeved on one end of each of the two circulation pipes 19 and the same return pipe 21 is fixedly installed thereon. Figure 8 As shown, a section of the circulation pipe 19 located inside the cooling jacket 20 is spirally distributed, and the return pipe 21 is fixedly installed on the top of the upper support plate 1 and connected to the thin-walled water tank 18.

[0029] More specifically, by setting up a cooling jacket 20, the temperature of the high-pressure gas stored inside the pressure tank 7 is generally between 40℃ and 80℃. When the pressure tank 7 delivers gas to the suspended gas cylinder 10, the circulation pipe 19 draws cooling water from the thin-walled water tank 18 and delivers it to the circulation pipes 19 on both sides via the water supply pipe 27. This allows the cooling water to have a high cooling area in the spiral pipe inside the cooling jacket 20, thereby effectively cooling the high-pressure gas delivered inside the gas supply pipe 15. This prevents the gas from overflowing from the opening of the suspended gas cylinder 10 during the initial gas delivery, which could cause low-temperature burns to personnel. At the same time, it also prevents the uncooled gas from affecting the magnetism of the permanent magnet 12.

[0030] like Figure 2 As shown, specifically, the thin-walled water tank 18 has multiple evenly distributed air passage holes 1801 on its side wall.

[0031] More specifically, by setting up a thin-walled water tank 18, multiple air vents 1801 are opened on the thin-walled water tank 18, which can effectively improve the heat dissipation capacity of the thin-walled water tank 18 itself and accelerate the cooling of the internal cooling water. At the same time, the hollow thin-walled water tank 18 can replace the traditional protective net to protect the location of the drag pulley assembly 4.

[0032] like Figure 4 As shown, specifically, multiple evenly distributed buffer rubber pads 24 are fixedly installed on the top of the lower support plate 8.

[0033] More specifically, by setting the buffer rubber pad 24, after the piston air compressor finishes working, each electromagnet 26 is energized again to drive the upper support plate 1 to rise, so that the opening of the suspended air cylinder 10 is connected to the outside again. At this time, the high-pressure gas inside the suspended air cylinder 10 dissipates, so that the internal and external air pressure is balanced. Then the electromagnet 26 is de-energized, the upper support plate 1 descends, and each permanent magnet 12 is inserted into the suspended air cylinder 10 again. The sealing rubber ring 17 can press the conical rubber ring 16, causing the conical rubber ring 16 to deform. At the same time, the upper support plate 1 will press the buffer rubber pad 24, causing the buffer rubber pad 24 to deform, thereby buffering the descent of the upper support plate 1 and realizing the safe reset of the upper support plate 1.

[0034] In summary: Before startup: In the initial state, each permanent magnet 12 is inserted into the levitation air cylinder 10, so that the upper support plate 1 and its upper equipment are stably placed on the pressure tank 7 and the lower support plate 8. When the equipment starts, each electromagnet 26 is synchronously energized, repelling the permanent magnets 12 of the same pole, providing levitation magnetic force, driving the upper support plate 1 to rise a certain distance, so that the air inlet 1001 is no longer blocked by the permanent magnets 12, and the levitation air cylinder 10 is connected to the air supply passages such as the air supply pipe 15. The first control valve group 5 switches the passage, so that a portion of the high-pressure gas stored inside the pressure tank 7 is released and transported to the arc-shaped air box 13, and then transported to each levitation air cylinder 10 through the air supply pipes 15 on both sides. The air pressure pushes the permanent magnets 12 to continue to rise, so that the permanent magnets 12 and the levitation air cylinder 10 are still inserted but no longer in contact. The air pressure forms an air buoyancy support, so that the upper support plate 1 and the lower support plate 8 are connected. When the rigid connection is broken, some of the high-pressure gas will be transported to the airbag 23 through the gas distribution pipe 22, causing the airbag 23 to expand and fill the gap between the upper support plate 1 and the lower support plate 8, thus limiting the vibration amplitude of the upper support plate 1. When the pressure tank 7 delivers gas to the suspended air cylinder 10, the circulation pipe 19 will draw cooling water from the thin-walled water tank 18 and deliver it to the circulation pipes 19 on both sides through the water supply pipe 27, so that the cooling water has a high cooling area in the spiral pipe inside the cooling jacket 20, thereby effectively cooling the high-pressure gas delivered inside the gas supply pipe 15. After that, each electromagnet 26 is de-energized, and the permanent magnet 12, which loses its magnetic support, will descend a certain distance, thereby pressing the sealing rubber ring 17 onto the top of the conical rubber ring 16, sealing the opening at the top of the suspended air cylinder 10. At this time, the second control valve group 14 disconnects the passage, and the gas remains inside the closed suspended air cylinder 10 to continue to provide support. At startup: the drag motor 3 drives the piston-type compressor cylinder 2 through the drag pulley group 4. The vibration generated during operation will not be directly transmitted to the pressure tank 7 below. When shut down: After the piston air compressor finishes working, each electromagnet 26 is energized again to drive the upper support plate 1 to rise, so that the opening of the suspended air cylinder 10 is connected to the outside again. At this time, the high-pressure gas inside the suspended air cylinder 10 dissipates, so that the internal and external air pressure is balanced. Then the electromagnet 26 is de-energized, the upper support plate 1 descends, and each permanent magnet 12 is inserted into the suspended air cylinder 10 again. The sealing rubber ring 17 can press the conical rubber ring 16, causing the conical rubber ring 16 to deform. At the same time, the upper support plate 1 will press the buffer rubber pad 24, causing the buffer rubber pad 24 to deform, thereby buffering the descent of the upper support plate 1 and realizing the safe reset of the upper support plate 1.

[0035] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention. The scope of protection claimed by the appended claims and their equivalents is defined.

Claims

1. A piston air compressor, characterized in that, The system includes an upper support plate (1), on the top of which a piston-type compressor cylinder (2) and a traction motor (3) are fixedly installed. The output end of the piston-type compressor cylinder (2) and the input end of the traction motor (3) are driven by the same traction pulley assembly (4). A first control valve assembly (5) is fixedly installed at the exhaust port of the piston-type compressor cylinder (2). An exhaust pipe (6) is fixedly installed at one end of the first control valve assembly (5). A pressure tank (7) is provided below the upper support plate (1). A lower support plate (8) is fixedly installed on the top of the upper support plate (1). The upper support plate (1) is placed on the top of the lower support plate (8). A receiving groove (801) is opened on the top of the lower support plate (8). A transmission air pipe (9) is fixedly installed inside the receiving groove (801). The bottom end of the transmission air pipe (9) is connected to the inside of the pressure tank (7). The top end of the transmission air pipe (9) is connected to the first control valve group (5). An air flotation support frame for air flotation support of the upper support plate (1) is provided on the lower support plate (8).

2. A piston air compressor according to claim 1, characterized in that, The air-floating support frame includes multiple suspended air cylinders (10) fixedly installed on the top of both sides of the lower support plate (8). Multiple suspension frames (11) corresponding to the positions of the suspended air cylinders (10) are fixedly installed on both sides of the upper support plate (1). Permanent magnets (12) adapted to the suspended air cylinders (10) are fixedly installed at the bottom of each suspension frame (11). The multiple permanent magnets (12) are located inside the multiple suspended air cylinders (10). An arc-shaped air box is fixedly installed on the top of the pressure tank (7). (13) A second control valve group (14) is fixedly installed on the arc-shaped air box (13). The second control valve group (14) is connected to the inside of the pressure tank (7). Both ends of the arc-shaped air box (13) are fixedly installed with air supply pipes (15). One end of each of the two air supply pipes (15) extends to both sides of the top of the lower support plate (8). One side of the bottom of the suspended air cylinder (10) is fixedly installed with an air supply hole (1001). The air supply hole (1001) is connected to the air supply pipe (15).

3. A piston air compressor according to claim 2, characterized in that, The top of each of the suspended air cylinders (10) is fixedly fitted with a conical rubber ring (16), and the bottom of the suspension frame (11) is fixedly fitted with a sealing rubber ring (17) that is compatible with the conical rubber ring (16).

4. A piston air compressor according to claim 2, characterized in that, A thin-walled water tank (18) is fixedly installed on the top of the upper support plate (1) near the side of the drag pulley assembly (4). A circulation pipe (19) is fixedly installed on one side of the thin-walled water tank (18). The inlet end of the circulation pipe (19) is connected to the inside of the thin-walled water tank (18). A water supply pipe (27) is fixedly installed at the outlet end of the circulation pipe (19). Two circulation pipes (19) are fixedly installed at one end of the water supply pipe (27). A cooling sleeve (20) is fixedly sleeved on the end of the air supply pipe (15) near the arc-shaped air box (13). The two circulation pipes (19) are both connected to the cooling sleeve (20) and fixedly installed with the same return pipe (21). The section of the circulation pipe (19) inside the cooling sleeve (20) is spirally distributed. The return pipe (21) is fixedly installed on the top of the upper support plate (1) and connected to the thin-walled water tank (18).

5. A piston air compressor according to claim 2, characterized in that, Suspension boxes (25) are fixedly installed on both sides of the bottom of the lower support plate (8). Multiple electromagnets (26) are fixedly installed inside the suspension box (25). The multiple electromagnets (26) are located at the bottom of the multiple suspension air cylinders (10). The polarity of the electromagnets (26) is consistent with that of the permanent magnet (12).

6. A piston air compressor according to claim 2, characterized in that, Airbags (23) are fixedly installed on both sides of the lower support plate (8), and air distribution pipes (22) are fixedly installed on one side of the air supply pipe (15). The two air distribution pipes (22) are respectively connected to the two airbags (23).

7. A piston air compressor according to claim 4, characterized in that, The thin-walled water tank (18) has multiple evenly distributed air passages (1801) on its side wall.

8. A piston air compressor according to claim 1, characterized in that, Multiple evenly distributed buffer rubber pads (24) are fixedly installed on the top of the lower support plate (8).

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