Filtering device used on air dryer

Abstract

The invention relates to the technical field of air filtration, in particular to a filter device used on an air dryer, which comprises filter tanks symmetrically fixed on a rack, filter screens are fixed in the filter tanks, filter holes penetrating through the filter screens are uniformly formed in the filter screens, air inlet pipes are fixed on the filter tanks below the filter screens, and air outlet pipes are fixed on the filter tanks below the filter screens. A sewage discharge pipe with a valve is fixed at the bottom of each filtering tank, a motor is fixed on the filtering tank below the filtering net, a stirring shaft is fixed at the output end of the motor, stirring blades are fixed on the stirring shaft, filtering paper is further fixed in the filtering tank above the filtering net, and an air outlet pipe with a valve is fixed at the top of each filtering tank. The air outlet pipes are connected with an air supply pipe, and a water inlet pipe is further fixed at the bottom of the filtering tank. According to the device, the filter screen can be cleaned, air is filtered again through the filter tank after the filter screen is cleaned, the filter screen does not need to be replaced, and the service life of the device is greatly prolonged.

Description

Technical Field

[0001] The present invention relates to the technical field of air filtration, and particularly to a filtration device used on an air dryer. Background Art

[0002] The function of a refrigerated air dryer is to remove moisture from compressed air through refrigeration technology. During the production process, compressed air contains impurities such as water and oil. Clean air is required to cool, dry it, and then discharge clean air to drive the operation of the air compressor. It is a component in a new type of pneumatic system. By using the expansion and vaporization temperature of the refrigerant, the air temperature is lowered, and the low-temperature refrigerant penetrates into the air through the humid-heat barrel, reducing the temperature of the hot air. The water in the air condenses into water droplets and settles, making the air dry and greatly reducing its water content.

[0003] Patent Application No.: CN202321725934.2 discloses a filter for a refrigerated air dryer, including a housing with an opening at the lower end. A filtering component is installed inside the housing. The filtering component includes a top cover, a base, a filtering layer, and a connecting member. The top cover is installed inside the housing, the base is installed at the bottom end of the top cover, and the filtering layer is installed between the base and the top cover. The top cover is fixed to the top end of the inner wall of the housing by cooperating connecting screws and a connecting plate. The top cover is connected to the inner wall of the housing. The device can be disassembled by removing the base. After the filtering layer of such an air filtration device is used for a period of time, impurities will block the filtering holes of the filtering layer. Since the device does not have a self-cleaning device, the filtering efficiency of the device is affected after the filtering holes are blocked, and the filtering layer needs to be maintained or replaced after disassembling the device to continue using.

[0004] The present invention is specifically studied and proposed in view of the deficiencies of the prior art. Summary of the Invention

[0005] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a filtration device used on an air dryer.

[0006] The present invention can be realized through the following technical solutions:

[0007] The present invention discloses a filtering device used on an air dryer, which includes filter tanks symmetrically fixed on a frame. Filter nets are fixedly arranged in the filter tanks. Filter holes penetrating through the filter nets are evenly arranged on the filter nets. Air inlet pipes are fixedly arranged on the filter tanks below the filter nets. Drain pipes with valves are fixedly arranged at the bottoms of the filter tanks. Motors are fixedly arranged on the filter tanks below the filter nets. Stirring shafts are fixedly arranged at the output ends of the motors. Stirring blades are fixedly arranged on the stirring shafts. Filter papers are also fixedly arranged in the filter tanks above the filter nets. Air outlet pipes with valves are fixedly arranged at the tops of the filter tanks. The air outlet pipes are all connected to an air supply pipe. A water inlet pipe is also fixedly arranged at the bottom of the filter tank. After external air enters the filter tank through the air inlet pipe, it is filtered by the filter net. After being filtered by the filter net, it is filtered by the filter paper. The air filtered by the filter paper is discharged through the air supply pipe and supplied to the dryer for use. When it is necessary to clean the impurities on the filter net, the valve on the air outlet pipe of the corresponding filter tank is closed, and tap water is discharged into the filter tank through the water inlet pipe. When the tap water submerges the filter net, the corresponding motor is started. The motor drives the stirring shaft to rotate, the stirring shaft drives the stirring blades to rotate, and the stirring blades drive the water to flow. The filter net is washed by the water flow. After the impurities on the filter net are washed away, the dust impurities are dissolved in the water. The drain pipe is opened, and the sewage dissolving the dust is discharged through the drain pipe, realizing the cleaning of the filter net. After the filter net is cleaned, the air is filtered by the filter tank again without replacing the filter net, greatly improving the service life of the device.

[0008] Preferably, support pipes are fixedly arranged in the filter tanks between the filter papers and the filter nets. Sealing covers are arranged on the support pipes. Exhaust pipes are fixedly arranged on the sealing covers. Multiple jet pipes are evenly fixedly arranged on the exhaust pipes. Return pipes are fixedly arranged in the filter tanks above the filter papers. The return pipe on one of the filter tanks is connected to the support pipe in the other filter tank through a connecting pipe. Valves are fixedly arranged on the connecting pipes. When it is necessary to clean the dust on the filter paper, first close the valves on the air outlet pipe and the air inlet pipe of the corresponding filter tank and open the valve on the drain pipe, and open the valve on the connecting pipe connected to the support pipe below the corresponding filter paper. After the compressor drives the air to enter another filter tank, the air is filtered and reaches above the filter paper. The filtered air returns to the filter tank of the filter paper to be cleaned through the return pipe. The filtered air is ejected through the jet pipes, and the air flow blows on the lower surface of the filter paper, blowing off the dust attached to the filter paper. The dust settles on the filter net. After the dust settles, close the valve on the drain pipe of the filter tank, and discharge tap water into the filter tank. After the tap water submerges the filter net, the dust is dissolved in the water and is discharged through the drain pipe again.

[0009] Preferably, the sealing cover is rotatably connected to the support pipe. A rotating shaft is fixed on the sealing cover, and a spiral blade is fixed on the rotating shaft inside the support pipe. When the air flow passes through the support pipe, after the air flow contacts the spiral blade, it drives the spiral blade to rotate. The spiral blade drives the sealing cover to rotate, and the spray pipe rotates around the sealing cover, realizing that the spray pipe rotates around the sealing cover below the filter paper, so as to realize the all-round flushing of the filter paper by the air flow and wash the dust on the filter paper down.

[0010] Preferably, a drain pipe with a valve is fixed on the top of each filtration tank. The internal and external pressure balance is achieved through the drain pipe, and tap water is discharged into the filtration tank.

[0011] The present invention has the following advantages compared with the existing technology:

[0012] This device can clean the filter net. After the filter net is cleaned, the air is filtered again through the filtration tank without replacing the filter net, greatly improving the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The following further describes in detail the specific embodiments of the present invention with reference to the drawings, wherein:

[0014] Figure 1 is a schematic structural diagram of the present invention;

[0015] Figure 2 is a schematic structural diagram of another angle of the present invention;

[0016] Figure 3 is Figure 2 a sectional view taken along line A-A in

[0017] Figure 4 is Figure 3 an enlarged view at B in

[0018] In the figure: 1, filtration tank; 2, outlet pipe; 3, supply pipe; 4, connecting pipe; 5, inlet pipe; 6, sewage pipe; 7, motor; 8, stirring shaft; 9, stirring blade; 10, filter net; 11, filtration hole; 12, filter paper; 13, return pipe; 14, support pipe; 15, sealing cover; 16, rotating shaft; 17, spiral blade; 18, exhaust pipe; 19, spray pipe; DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following describes in detail the embodiments of the present invention with reference to the drawings:

[0020] Embodiment 1:

[0021] As shown in Figures 1 to 4As shown in the figure, this embodiment discloses a filtering device used on an air dryer, which includes a filtering tank 1 symmetrically fixed on a frame (not shown). A filter screen 10 is fixedly arranged in the filtering tank 1. Filter holes 11 penetrating through the filter screen 10 are evenly arranged on the filter screen 10. An air inlet pipe 5 is fixedly arranged on the filtering tank 1 below the filter screen 10. A sewage discharge pipe 6 with a valve is fixedly arranged at the bottom of the filtering tank 1. A motor 7 is fixedly arranged on the filtering tank 1 below the filter screen 10. A stirring shaft 8 is fixedly arranged at the output end of the motor 7. Stirring blades 9 are fixedly arranged on the stirring shaft 8. A filter paper 12 is also fixedly arranged in the filtering tank 1 above the filter screen 10. An air outlet pipe 2 with a valve is fixedly arranged at the top of the filtering tank 1. The air outlet pipes 2 are all connected to a supply air pipe 3. A water inlet pipe is also fixedly arranged at the bottom of the filtering tank 1. External air enters the filtering tank 1 through the air inlet pipe 5 and is filtered by the filter screen 10. After being filtered by the filter screen 10, it is filtered by the filter paper 12. The air filtered by the filter paper 12 is discharged through the supply air pipe 3 and supplied for use by the dryer. When it is necessary to clean the impurities on the filter screen 10, the valve on the air outlet pipe 2 of the corresponding filtering tank 1 is closed, and tap water is discharged into the filtering tank 1 through the water inlet pipe. When the tap water submerges the filter screen 10, the corresponding motor 7 is started. The motor 7 drives the stirring shaft 8 to rotate, the stirring shaft 8 drives the stirring blades 9 to rotate, and the stirring blades 9 drive the water to flow. The filter screen 10 is washed by the water flow. After the impurities on the filter screen 10 are washed away, the dust impurities are dissolved in the water. The sewage discharge pipe 6 is opened, and the sewage dissolving the dust is discharged through the sewage discharge pipe 6, realizing the cleaning of the filter screen 10. After the filter screen 10 is cleaned, the air is filtered again by the filtering tank 1 without replacing the filter screen 10, greatly improving the service life of the device.

[0022] Wherein, an air vent pipe with a valve is fixedly arranged at the top of each of the filtering tanks 1. The internal and external pressure balance is achieved through the air vent pipe, and the tap water is discharged into the filtering tank 1.

[0023] Embodiment 2:

[0024] This embodiment discloses a filtering device used on an air dryer. On the basis of the structure and principle of Embodiment 1, support pipes 14 are fixedly arranged in the filter tank 1 between the filter paper 12 and the filter net 10. A sealing cover 15 is arranged on the support pipe 14, and exhaust pipes 18 are fixedly arranged on the sealing cover 15. A plurality of jet pipes 19 are evenly fixedly arranged on the exhaust pipe 18. Return pipes 13 are fixedly arranged in the filter tank 1 above the filter paper 12. The return pipe 13 on one of the filter tanks 1 is connected to the support pipe 14 in the other filter tank 1 through a connecting pipe 4, and valves are fixedly arranged on the connecting pipe 4. When it is necessary to clean the dust on the filter paper 12, first close the valves on the air outlet pipe 2 and the air inlet pipe 5 of the corresponding filter tank 1 and open the valve on the sewage discharge pipe 6, and open the valve on the connecting pipe 4 connected to the support pipe 14 below the corresponding filter paper 12. After the compressor drives the air to enter another filter tank 1, the air is filtered and reaches above the filter paper 12. The filtered air returns to the filter tank 1 of the filter paper 12 to be cleaned through the return pipe 13. The filtered air is ejected through the jet pipe 19, and the air flow blows on the lower surface of the filter paper 12, blowing off the dust attached to the filter paper 12. The dust settles on the filter net 10. After the dust settles, close the valve on the sewage discharge pipe 6 of the filter tank 1. By discharging tap water into the filter tank 1, after the tap water covers the filter net 10, the dust dissolves in the water and is discharged again through the sewage discharge pipe 6.

[0025] Wherein, the sealing cover 15 is rotatably connected to the support pipe 14, a rotating shaft 16 is fixedly arranged on the sealing cover 15, and a spiral blade 17 is fixedly arranged on the rotating shaft 16 in the support pipe 14. When the air flow passes through the support pipe 14, after the air flow contacts the spiral blade 17, it drives the spiral blade 17 to rotate. The spiral blade 17 drives the sealing cover 15 to rotate, and the jet pipe 19 rotates around the sealing cover 15, realizing that the jet pipe 19 rotates around the sealing cover 15 below the filter paper 12, realizing the all-round scouring of the filter paper 12 by the air flow and blowing off the dust on the filter paper 12.

[0026] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art of this technology, without departing from the technical principle of the present invention, various changes, modifications, substitutions and variations can be made to these embodiments, and these changes, modifications, substitutions and variations should also be regarded as the protection scope of the present invention.

Claims

1. A filter device used in an air dryer, characterized in that: It comprises a filter tank symmetrically fixed on a frame, wherein a filter screen is fixed in the filter tank, filter holes penetrating the filter screen are evenly arranged on the filter screen, an air inlet pipe is fixed on the filter tank below the filter screen, a sewage pipe with a valve is fixed on the bottom of the filter tank, a motor is fixed on the filter tank below the filter screen, a stirring shaft is fixed on the output end of the motor, stirring blades are fixed on the stirring shaft, filter paper is also fixed in the filter tank above the filter screen, an air outlet pipe with a valve is fixed on the top of the filter tank, the air outlet pipe is connected to the air supply pipe, and a water inlet pipe is also fixed on the bottom of the filter tank.

2. The filter device used in the air dryer according to claim 1, characterized in that: A support tube is fixed in the filter tank between the filter paper and the filter screen, a sealing cover is provided on the support tube, an exhaust pipe is fixed on the sealing cover, a plurality of jet pipes are evenly fixed on the exhaust pipe, a return pipe is fixed in the filter tank above the filter paper, the return pipe on one filter tank is connected to the support tube in another filter tank through a connecting pipe, and a valve is fixed on the connecting pipe.

3. The filter device used in the air dryer according to claim 2, characterized in that: The sealing cover is rotatably connected to the support tube. A rotating shaft is fixed on the sealing cover, and a spiral blade is fixed on the rotating shaft in the support tube.

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