A compressed air purification device

Abstract

The present invention discloses a compressed air purification device, which relates to the technical field of terminal water removal of compressed air, and comprises a shell, wherein two connecting nozzles protruding outwards are symmetrically integrally formed on both sides of the outer wall of the shell, an air inlet pipe is threadedly installed on the outer wall of one of the connecting nozzles, and an air outlet pipe is threadedly installed on the outer wall of the other connecting nozzle, and a downwardly protruding drainage nozzle is integrally formed at the bottom end of the shell, a water collecting box is installed at the bottom end of the drainage nozzle, and a downwardly protruding water outlet nozzle is integrally formed at the bottom end of the water collecting box; a drainage mechanism penetrating to the inner wall of the water collecting box is slidably installed on the outer wall of the drainage nozzle. The present invention can achieve the purpose of automatically discharging the water in the collection box by arranging a power mechanism, an extrusion mechanism and a valve mechanism, without manual operation, and can effectively avoid the interaction between the internal high-pressure gas and the external normal-pressure gas, thereby ensuring the sealing of the high-pressure gas.

Description

Technical Field

[0001] The present invention relates to the technical field of terminal water removal of compressed air, in particular to a compressed air purification device. Background Art

[0002] The air compressor can draw in external air and compress it to form high-pressure gas. The purification equipment used for compressed gas includes front-end purification equipment and back-end purification equipment. The front-end purification equipment is mainly used to filter the air entering the compressor to prevent dust and impurities from entering the air compressor, and the back-end filtration is mainly used to remove water and oil produced by compressed air.

[0003] After the air is compressed, the water contained in the air is liquefied to form droplets that move synchronously with the compressed air. Therefore, corresponding purification equipment needs to be set up at the end to achieve liquid-gas separation. The existing purification method is centrifugal filtration. Because the density of air and water is inconsistent, the water flows downward under the action of centrifugal force, while the airflow will flow back up to achieve the purpose of water-gas separation. As the water accumulates in the device, the collected water needs to be discharged regularly; in order to prevent the internal high-pressure gas from interacting with the external normal-pressure gas during the drainage process, the prior art generally manually closes the passage through which the water flows, and then removes the water collecting tank to discharge the water. This method is obviously not convenient enough. Summary of the invention

[0004] The purpose of the present invention is to provide a compressed air purification device in order to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a compressed air purification device, comprising a shell, two connecting nozzles protruding outwards are symmetrically integrally formed on both sides of the outer wall of the shell, an air inlet pipe is threadedly installed on the outer wall of one of the connecting nozzles, and an air outlet pipe is threadedly installed on the outer wall of the other connecting nozzle, a downwardly protruding drainage nozzle is integrally formed at the bottom end of the shell, a water collecting tank is installed at the bottom end of the drainage nozzle, and a downwardly protruding water outlet nozzle is integrally formed at the bottom end of the water collecting tank; a drainage mechanism that penetrates the inner wall of the water collecting tank is slidably installed on the outer wall of the drainage nozzle, The outer wall of the water collecting box is installed with a power mechanism that drives the drainage mechanism to move downward; the inner wall of the drainage nozzle is installed with a valve mechanism that penetrates the water collecting box and extends to the inside of the water outlet nozzle, and the valve mechanism includes: an upper valve plate assembly, a middle valve plate assembly, a lower valve plate assembly and a vertical rod; the input end of the connecting nozzle connected to the air outlet pipe is fixedly installed with a connecting pipe, and the input end of the connecting pipe is fixedly installed with an inner pipe, the connecting pipe and the inner pipe are both located inside the outer shell, the bottom end of the inner tube does not contact the bottom end of the outer shell, and the inner wall of the outer shell is formed with an inner spiral groove.

[0006] As a further solution of the present invention: the drainage mechanism includes a lifting plate slidably connected to the outer wall of the drainage nozzle, the bottom end of the lifting plate is integrally formed with a moving rod that penetrates the inner wall of the water collecting tank, a No. 1 return spring is abutted between the bottom end of the outer shell and the top end of the water collecting tank, the No. 1 return spring is sleeved on the moving rod, the bottom end of the moving rod is fixedly connected with a piston, the outer wall of the piston is equipped with a sealing ring that fits with the inner wall of the water collecting tank, and the bottom end of the piston fits with the bottom end of the inner wall of the water collecting tank.

[0007] As a further solution of the present invention: the power mechanism includes a fixed plate fixedly installed below the outer wall of the water collecting tank, the top of the fixed plate is located at the outer periphery of the water collecting tank and an electric push cylinder is fixedly installed, the output end of the electric push cylinder is fixedly installed with a pressure plate, the bottom end of the pressure plate is in contact with the top of the lifting plate, and the outer periphery of the water collecting tank is fixed with a guide ear that is slidably connected to the telescopic shaft of the electric push cylinder.

[0008] As a further solution of the present invention: the upper valve plate assembly includes a No. 1 protrusion integrally formed on the inner wall of the drain nozzle and a No. 1 sealing valve located above the No. 1 protrusion, the top end of the No. 1 protrusion is integrally formed with a No. 1 sealing cone ring, the top of the No. 1 sealing valve is integrally formed with an No. 1 upper cone surface, and the bottom end of the No. 1 sealing valve is integrally formed with a lower cone surface that fits with the No. 1 sealing cone ring.

[0009] As a further solution of the present invention: a sliding sleeve is fixedly installed at the center of the bottom end of the No. 1 sealing valve, and the sliding sleeve is slidably connected to the top of the outer wall of the vertical rod. A connecting spring is abutted between the bottom end of the inner wall of the sliding sleeve and the protruding part of the top end of the vertical rod, and the connecting spring is sleeved on the outer periphery of the vertical rod.

[0010] As a further solution of the present invention: the middle valve plate assembly includes a No. 2 protrusion integrally formed above the inner wall of the center hole and a No. 2 sealing valve fixedly installed on the middle section of the outer wall of the vertical rod, the center hole is located at the center of the piston, the top end of the No. 2 protrusion is integrally formed with a guide cone surface, the bottom end of the No. 2 protrusion is installed with a No. 2 sealing cone ring, and the top end of the No. 2 sealing valve is integrally formed with a No. 2 upper cone surface that fits with the No. 2 sealing cone ring.

[0011] As a further solution of the present invention: the lower valve plate assembly includes a fixed disk fixedly mounted on the inner wall of the water outlet and a No. 3 sealing valve fixedly mounted on the bottom end of the vertical rod, the vertical rod is slidably connected to the central circular hole of the fixed disk up and down, the top of the No. 3 sealing valve is integrally formed with a No. 3 upper conical surface, the inner wall of the water outlet is located below the fixed disk and is integrally formed with a circular groove, a No. 3 sealing cone ring that fits with the No. 3 upper conical surface is installed on the top of the inner wall of the circular groove, a No. 2 return spring is abutted between the No. 3 sealing valve and the fixed disk, and the No. 2 return spring is sleeved on the outer periphery of the vertical rod.

[0012] As a further solution of the present invention: a sliding cylinder is integrally formed on the top of the piston, an annular groove for the sliding cylinder to slide up and down is formed on the inner wall of the drain nozzle, and a sealing member is installed on the outer wall of the sliding cylinder.

[0013] As a further solution of the present invention: an air hole is opened at an eccentric position of the top plate of the water collecting tank, and the air hole is communicated with the inner cavity of the water collecting tank.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] By setting up a power mechanism, an extrusion mechanism and a valve mechanism, the purpose of automatically discharging the water in the collection box can be achieved without manual operation, and the interaction between the internal high-pressure gas and the external normal-pressure gas can be effectively avoided, thereby ensuring the sealing of the high-pressure gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 It is a schematic diagram of the internal structure of the present invention;

[0018] Figure 3 It is a schematic diagram of the internal structure of the water collecting tank of the present invention;

[0019] Figure 4 For the present invention Figure 3 A partial enlarged view of the middle part;

[0020] Figure 5 For the present invention Figure 3 A partial enlarged view of point B in the middle;

[0021] Figure 6 For the present invention Figure 3 A partial enlarged view of point C in the middle;

[0022] Figure 7 It is a structural schematic diagram of the piston of the present invention;

[0023] Figure 8It is a structural schematic diagram of the valve mechanism of the present invention;

[0024] Fig. 9 For the present invention Figure 8 A partial enlarged view of point D in the middle.

[0025] In the figure: 1. Shell; 2. Connecting nozzle; 3. Inlet pipe; 4. Outlet pipe; 5. Inner pipe; 6. Connecting pipe; 7. Drain nozzle; 8. Inner spiral groove; 9. Water collecting box; 10. Outlet nozzle; 11. Fixed plate; 12. Electric push cylinder; 13. Pressing plate; 14. Lifting plate; 15. Guide ear; 16. Moving rod; 17. No. 1 return spring; 18. Piston; 19. Sealing ring; 20. Center hole; 21. Fixed plate; 22. Vertical rod; 23. No. 1 seal Sealing valve; 24. No. 1 upper cone; 25. Lower cone; 26. No. 1 convex block; 27. No. 1 sealing cone ring; 28. No. 2 sealing valve; 29. ​​No. 2 upper cone; 30. Sliding sleeve; 31. Connecting spring; 32. No. 2 convex block; 33. Guide cone; 34. No. 2 sealing cone ring; 35. Sliding cylinder; 36. No. 3 sealing valve; 37. No. 3 upper cone; 38. Circular groove; 39. No. 3 sealing cone ring; 40. No. 2 reset spring; 41. Air hole. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figures 1 to 9 In an embodiment of the present invention, a compressed air purification device includes a shell 1, two connecting nozzles 2 protruding outward are symmetrically integrally formed on both sides of the outer wall of the shell 1, an air inlet pipe 3 is threadedly installed on the outer wall of one connecting nozzle 2, and an air outlet pipe 4 is threadedly installed on the outer wall of the other connecting nozzle 2, and a downwardly protruding drainage nozzle 7 is integrally formed at the bottom end of the shell 1, a water collecting tank 9 is installed at the bottom end of the drainage nozzle 7, and a downwardly protruding water outlet nozzle 10 is integrally formed at the bottom end of the water collecting tank 9; a drainage mechanism penetrating to the inner wall of the water collecting tank 9 is slidably installed on the outer wall of the drainage nozzle 7, and the water collecting tank The outer wall of 9 is installed with a power mechanism that drives the drainage mechanism to move downward; the inner wall of the drainage nozzle 7 is installed with a valve mechanism that penetrates the water collecting box 9 and extends to the inside of the water outlet nozzle 10, and the valve mechanism includes: an upper valve plate assembly, a middle valve plate assembly, a lower valve plate assembly and a vertical rod 22; the input end of the connecting nozzle 2 connected to the air outlet pipe 4 is fixedly installed with a connecting pipe 6, and the input end of the connecting pipe 6 is fixedly installed with an inner pipe 5, the connecting pipe 6 and the inner pipe 5 are both located inside the outer shell 1, the bottom end of the inner pipe 5 does not contact the bottom end of the outer shell 1, and the inner wall of the outer shell 1 is formed with an inner spiral groove 8.

[0028] In this embodiment: the device is connected to the air outlet of the air compressor, and the gas compressed by the air compressor enters the outer shell 1 through the air inlet pipe 3, and after entering the outer shell 1, the gas moves downward in a spiral under the guidance of the inner spiral groove 8. The spirally moving gas has centrifugal force. Since the water content in the high-pressure gas is greater than that of the air, the water is distributed on the outside, and the gas is distributed on the inside, thereby achieving a preliminary separation of air and water. After that, the gas can move upward into the inner tube 5 after being blocked when moving to the bottom end of the outer shell 1, while the water flows along the bottom end of the inner wall of the outer shell 1 and enters the water collecting tank 9 through the drain nozzle 7. The gas entering the inner tube 5 is discharged from the air outlet pipe 4 through the connecting pipe 6.

[0029] When the water in the water collecting tank 9 accumulates to a certain volume, it needs to be discharged out in time. At this time, the power mechanism is started, and the power mechanism pushes the drainage mechanism to move downward. At this time, the drainage mechanism squeezes out the water in the water collecting tank 9. When the drainage mechanism moves downward, the drainage mechanism contacts and squeezes the middle valve plate assembly. At this time, the middle valve plate assembly is forced to drive the upper valve plate assembly to close through the vertical rod 22, and open the lower valve plate assembly. At this time, the negative pressure generated by the operation of the piston 18 will not affect the flow of the internal high-pressure gas, and the opening of the lower valve plate assembly and the squeezing of the drainage mechanism can quickly discharge the water in the water collecting tank 9.

[0030] After the water is discharged, the power mechanism resets upward, and the drainage mechanism resets upward synchronously, so the middle valve plate assembly resets upward synchronously, realizing that the upper valve plate assembly is changed from a closed state to an open state, and the lower valve plate assembly is changed from an open state to a closed state, allowing the separated water to enter the water collecting tank 9 from the drainage nozzle 7 again.

[0031] Please refer to Figure 1 , Figure 2 and Figure 3 The power mechanism includes a fixed plate 11 fixedly installed below the outer wall of the water collecting box 9, the top of the fixed plate 11 is located on the outer periphery of the water collecting box 9 and is fixedly installed with an electric push cylinder 12, the output end of the electric push cylinder 12 is fixedly installed with a pressure plate 13, the bottom end of the pressure plate 13 is in contact with the top of the lifting plate 14, the outer periphery of the water collecting box 9 is fixed with a guide ear 15 slidably connected to the telescopic shaft of the electric push cylinder 12, the drainage mechanism includes a lifting plate 14 slidably connected to the outer wall of the drainage nozzle 7, the bottom end of the lifting plate 14 is integrally formed with a moving rod 16 that penetrates the inner wall of the water collecting box 9, a No. 1 return spring 17 is abutted between the bottom end of the shell 1 and the top of the water collecting box 9, the No. 1 return spring 17 is sleeved with the moving rod 16, the bottom end of the moving rod 16 is fixedly connected with a piston 18, the outer wall of the piston 18 is equipped with a sealing ring 19 that fits with the inner wall of the water collecting box 9, and the bottom end of the piston 18 fits with the bottom end of the inner wall of the water collecting box 9.

[0032] In this embodiment: by starting the electric push cylinder 12, the electric push cylinder 12 shortens and drives the pressure plate 13 to move downward. At this time, the lifting plate 14 is subjected to downward pressure, and the lifting plate 14 can push multiple moving rods 16 to move downward synchronously. At the same time, the No. 1 return spring 17 is compressed, and the moving rod 16 moving downward pushes the piston 18 to move downward, and the piston 18 squeezes the water body. At the same time, the setting of the sealing ring 19 can prevent the water body from moving from the periphery of the piston 18 to the top of the piston 18, and the downward moving piston 18 squeezes the middle valve plate assembly to realize the downward movement of the middle valve plate assembly.

[0033] After drainage is completed, the electric push cylinder 12 resets upward, and multiple No. 1 reset springs 17 reset synchronously, pushing the lifting plate 14 to reset upward to the initial position. The reset lifting plate 14 drives the piston 18 and the sealing ring 19 to reset to the initial position through the moving rod 16.

[0034] Please refer to Figure 3 , Figure 5 and Figure 8 The middle valve plate assembly includes a No. 2 protrusion 32 integrally formed above the inner wall of the center hole 20 and a No. 2 sealing valve 28 fixedly installed on the middle section of the outer wall of the vertical rod 22. The center hole 20 is located at the center of the piston 18. The top of the No. 2 protrusion 32 is integrally formed with a guide cone 33, and the bottom end of the No. 2 protrusion 32 is installed with a No. 2 sealing cone ring 34. The top of the No. 2 sealing valve 28 is integrally formed with a No. 2 upper cone 29 that fits with the No. 2 sealing cone ring 34.

[0035] In this embodiment: when the piston 18 is at the highest position, there is a channel for the water supply to flow downward between the No. 2 protrusion 32 and the No. 2 sealing cone ring 34 at its bottom end and the No. 2 sealing valve plate 28, and the downward moving piston 18 drives the No. 2 protrusion 32 in its center hole 20 to move downward synchronously. As the No. 2 protrusion 32 and the No. 2 sealing cone ring 34 at its bottom end move downward, the channel for the water supply movement gradually decreases until the No. 2 sealing cone ring 34 is in close contact with the No. 2 upper cone surface 29 of the outer wall of the No. 2 sealing valve plate 28. At this time, the channel for the water supply flow is completely closed, and the No. 2 protrusion 32 and the No. 2 sealing cone ring 34 that continue to move downward with the piston 18 push the No. 2 sealing valve plate 28 to move downward, and the No. 2 sealing valve plate 28 that moves downward pushes the vertical rod 22 to move downward synchronously. The above process is the process of the middle valve plate assembly changing from an open state to a closed state. It should be noted that the arrangement of the second upper cone surface 29 and the guide cone surface 33 can facilitate the water to flow downward more smoothly and reduce the flow resistance.

[0036] Please refer to Figure 3 , Figure 4 , Figure 5 , Figure 8 and Fig. 9The upper valve plate assembly includes a No. 1 protrusion 26 integrally formed on the inner wall of the drain nozzle 7 and a No. 1 sealing valve 23 located above the No. 1 protrusion 26, a No. 1 sealing conical ring 27 is integrally formed at the top of the No. 1 protrusion 26, a No. 1 upper conical surface 24 is integrally formed on the top of the No. 1 sealing valve 23, and a lower conical surface 25 that fits the No. 1 sealing conical ring 27 is integrally formed at the bottom end of the No. 1 sealing valve 23. A sliding sleeve 30 is fixedly installed at the center of the bottom end of the No. 1 sealing valve 23, and the sliding sleeve 30 is slidably connected to the top of the outer wall of the vertical rod 22. A connecting spring 31 is abutted between the bottom end of the inner wall of the sliding sleeve 30 and the protruding portion at the top end of the vertical rod 22, and the connecting spring 31 is sleeved on the outer periphery of the vertical rod 22.

[0037] In this embodiment: there is a channel for water circulation between the No. 1 sealing valve plate 23 and the No. 1 sealing cone ring 27 at the highest position. During the downward movement of the vertical rod 22, the vertical rod 22 synchronously drives the No. 1 sealing valve plate 23 to move downward through the sliding sleeve 30 until the No. 1 sealing valve plate 23 is tightly fitted with the No. 1 sealing cone ring 27. At this time, the channel is closed, and the movement of the No. 1 sealing valve plate 23 is blocked and cannot continue to move, so the sliding sleeve 30 cannot move accordingly. At this time, the vertical rod 22 continues to move downward, so the connecting spring 31 is compressed in this process, and the vertical rod 22 slides up and down relative to the sliding sleeve 30. It should be noted that: the conical surface of the No. 1 upper cone 24 and the conical surface of the No. 1 sealing cone ring 27 can facilitate the water to flow downward more smoothly and reduce the flow resistance.

[0038] Please refer to Figure 3 , Figure 6 and Figure 8 The lower valve plate assembly includes a fixed disk 21 fixedly mounted on the inner wall of the water outlet 10 and a No. 3 sealing valve 36 fixedly mounted on the bottom end of the vertical rod 22. The vertical rod 22 is slidably connected to the central circular hole of the fixed disk 21 up and down. The top of the No. 3 sealing valve 36 is integrally formed with a No. 3 upper conical surface 37. The inner wall of the water outlet 10 is located below the fixed disk 21 and is integrally formed with a circular groove 38. The top of the inner wall of the circular groove 38 is installed with a No. 3 sealing cone ring 39 that fits with the No. 3 upper conical surface 37. A No. 2 return spring 40 is abutted between the No. 3 sealing valve 36 and the fixed disk 21, and the No. 2 return spring 40 is sleeved on the outer periphery of the vertical rod 22.

[0039] In this embodiment: when the vertical rod 22 slides downward, the vertical rod 22 and the fixed plate 21 slide relative to each other, and drive the No. 3 sealing valve 36 to move downward synchronously. At this time, the No. 3 sealing valve 36 drives the No. 3 upper cone surface 37 and the No. 3 sealing cone surface ring 39 from the contact state to the separation state. At this time, the water in the water collecting tank 9 can be discharged outward along the No. 3 upper cone surface 37 to complete the discharge of the water. In this process, the No. 2 return spring 40 is stretched.

[0040] Please refer to Figure 5 and Figure 7A sliding cylinder 35 is integrally formed at the top of the piston 18, an annular groove is formed on the inner wall of the drain nozzle 7 for the sliding cylinder 35 to slide up and down, and a seal is installed on the outer wall of the sliding cylinder 35. An air hole 41 is opened at an eccentric position of the top plate of the water collecting tank 9, and the air hole 41 is connected to the inner cavity of the water collecting tank 9.

[0041] In this embodiment: during the downward movement of the piston 18, the top of the piston 18 is separated from the top of the inner wall of the water collecting tank 9. At this time, the external gas enters to the top of the piston 18 through the air hole 41, and the sliding cylinder 35 moves downward synchronously along the annular groove. When the upper valve assembly is not completely closed, the interaction between the internal high-pressure gas and the external normal-pressure gas can be avoided, thereby avoiding the leakage of the internal high-pressure gas. At the same time, the design of the air hole 41 can make it easier for the piston 18 to encounter less resistance during the downward and upward movement.

[0042] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A compressed air purification device, comprising a housing (1), wherein two connecting nozzles (2) protruding outward are symmetrically integrally formed on both sides of the outer wall of the housing (1), an air inlet pipe (3) is threadedly mounted on the outer wall of one connecting nozzle (2), and an air outlet pipe (4) is threadedly mounted on the outer wall of the other connecting nozzle (2), characterized in that: The bottom end of the housing (1) is integrally formed with a downwardly protruding drainage nozzle (7), the bottom end of the drainage nozzle (7) is mounted with a water collecting box (9), and the bottom end of the water collecting box (9) is integrally formed with a downwardly protruding water outlet nozzle (10); a drainage mechanism penetrating the inner wall of the water collecting box (9) is slidably mounted on the outer wall of the drainage nozzle (7), and a power mechanism for driving the drainage mechanism to move downward is mounted on the outer wall of the water collecting box (9); a power mechanism penetrating the water collecting box (9) and extending to the water outlet nozzle (10) is mounted on the inner wall of the drainage nozzle (7). 0) an internal valve mechanism, the valve mechanism comprising: an upper valve plate assembly, a middle valve plate assembly, a lower valve plate assembly and a vertical rod (22); a connecting pipe (6) is fixedly mounted on the input end of the connecting nozzle (2) connected to the air outlet pipe (4), an inner pipe (5) is fixedly mounted on the input end of the connecting pipe (6), the connecting pipe (6) and the inner pipe (5) are both located inside the outer shell (1), the bottom end of the inner pipe (5) does not contact the bottom end of the outer shell (1), and an inner spiral groove (8) is formed on the inner wall of the outer shell (1); The drainage mechanism comprises a lifting plate (14) slidably connected to the outer wall of the drainage nozzle (7); the bottom end of the lifting plate (14) is integrally formed with a moving rod (16) penetrating the inner wall of the water collecting tank (9); a No. 1 return spring (17) is abutted between the bottom end of the outer shell (1) and the top end of the water collecting tank (9); the No. 1 return spring (17) is sleeved with the moving rod (16); the bottom end of the moving rod (16) is fixedly connected with a piston (18); the outer wall of the piston (18) is equipped with a sealing ring (19) that fits with the inner wall of the water collecting tank (9); and the bottom end of the piston (18) fits with the bottom end of the inner wall of the water collecting tank (9).

2. A compressed air purification device according to claim 1, characterized in that: The power mechanism comprises a fixing plate (11) fixedly mounted below the outer wall of the water collecting box (9); an electric push cylinder (12) is fixedly mounted on the top of the fixing plate (11) located on the outer periphery of the water collecting box (9); a pressure plate (13) is fixedly mounted on the output end of the electric push cylinder (12); the bottom end of the pressure plate (13) contacts the top end of the lifting plate (14); and a guide ear (15) slidably connected to the telescopic shaft of the electric push cylinder (12) is fixed on the outer periphery of the water collecting box (9).

3. A compressed air purification device according to claim 2, characterized in that: The upper valve plate assembly comprises a No. 1 protrusion (26) integrally formed on the inner wall of the drain nozzle (7) and a No. 1 sealing valve (23) located above the No. 1 protrusion (26); a No. 1 sealing conical ring (27) is integrally formed on the top of the No. 1 protrusion (26); a No. 1 upper conical surface (24) is integrally formed on the top of the No. 1 sealing valve (23); and a lower conical surface (25) that fits the No. 1 sealing conical ring (27) is integrally formed on the bottom of the No. 1 sealing valve (23).

4. A compressed air purification device according to claim 3, characterized in that: A sliding sleeve (30) is fixedly mounted at the center of the bottom end of the No. 1 sealing valve (23). The sliding sleeve (30) is slidably connected to the upper part of the outer wall of the vertical rod (22). A connecting spring (31) is abutted between the bottom end of the inner wall of the sliding sleeve (30) and the protruding portion at the top end of the vertical rod (22). The connecting spring (31) is sleeved on the outer periphery of the vertical rod (22).

5. A compressed air purification device according to claim 3, characterized in that: The middle valve plate assembly comprises a No. 2 protrusion (32) integrally formed on the upper inner wall of the center hole (20) and a No. 2 sealing valve (28) fixedly mounted on the middle section of the outer wall of the vertical rod (22); the center hole (20) is located at the center of the piston (18); a guide cone surface (33) is integrally formed on the top end of the No. 2 protrusion (32); a No. 2 sealing cone surface ring (34) is mounted on the bottom end of the No. 2 protrusion (32); and a No. 2 upper cone surface (29) is integrally formed on the top end of the No. 2 sealing cone surface ring (34) so ​​as to fit the No. 2 sealing cone surface ring (34).

6. A compressed air purification device according to claim 1, characterized in that: The lower valve plate assembly comprises a fixed disk (21) fixedly mounted on the inner wall of the water outlet nozzle (10) and a No. 3 sealing valve (36) fixedly mounted on the bottom end of the vertical rod (22); the vertical rod (22) is slidably connected to the central circular hole of the fixed disk (21) up and down; a No. 3 upper conical surface (37) is integrally formed at the top of the No. 3 sealing valve (36); a circular groove (38) is integrally formed on the inner wall of the water outlet nozzle (10) below the fixed disk (21); a No. 3 sealing cone ring (39) that fits the No. 3 upper conical surface (37) is installed at the top end of the inner wall of the circular groove (38); a No. 2 return spring (40) is abutted between the No. 3 sealing valve (36) and the fixed disk (21); the No. 2 return spring (40) is sleeved on the outer periphery of the vertical rod (22).

7. A compressed air purification device according to claim 6, characterized in that: A sliding cylinder (35) is integrally formed at the top end of the piston (18), an annular groove for the sliding cylinder (35) to slide up and down is formed on the inner wall of the drainage nozzle (7), and a sealing member is installed on the outer wall of the sliding cylinder (35).

8. A compressed air purification device according to claim 1, characterized in that: An air hole (41) is provided at an eccentric position of the top end plate of the water collecting box (9), and the air hole (41) is communicated with the inner cavity of the water collecting box (9).

Images