Multi-stage filtering type drying cylinder

Abstract

The utility model relates to a multistage filtering type drying cylinder which comprises an inner container shell, a cylinder outer shell, an inner container cover, a connecting disc, a bottom sealing cover and a filtering piece, and the filtering piece comprises a metal filter screen, an oil absorption filter element and a molecular sieve. The compressed air flows out from the air outlet channel through the metal filter screen, the oil absorption filter element and the molecular sieve, the drying cylinder adsorbs and filters the oil dirt for multiple times, the stroke of the compressed air passing through the molecular sieve is prolonged through the internal structure of the inner container shell, the output compressed air is drier, and due to the fact that the metal filter screen is easier to clean compared with a traditional filter element, when the drying cylinder is cleaned, the filter element is more convenient to clean. When clean gas reversely enters the drying cylinder from the gas outlet channel, more water and oil dirt can be brought out, and therefore the service life of the drying cylinder is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of air dryer, especially a multistage filter formula drying cylinder. BACKGROUND

[0002] The filter drying cylinder is mainly used for cleaning and drying compressed air before the air brake system of the automobile, and the filter element of the filter drying cylinder comprises a filter core for adsorbing and intercepting oil and a molecular sieve for adsorbing and intercepting water, wherein the filter core is made of a material such as melt-blown cloth for adsorbing oil, and the effect of adsorbing and intercepting oil is good, when the filter drying cylinder is back-flushed with clean gas, most of the oil in the filter core cannot be taken out by the airflow, so that the cleaning effect of the filter drying cylinder is poor, and the service life is affected. SUMMARY

[0003] In order to overcome the defects in the background art, the utility model adopts the technical scheme of a multistage filter formula drying cylinder, which comprises an inner shell, a cylinder shell, an inner shell cover, a connecting disc, a bottom cover and a filter element, the inner shell is sleeved with the cylinder shell, and the upper and lower ends of the inner shell are respectively connected with the inner shell cover and the connecting disc, the connecting disc is fixedly connected to the cylinder shell through the bottom cover, the connecting disc and the inner shell are combined to form an air inlet channel and an air outlet channel, the filter element comprises a metal filter screen, an oil absorption filter core and a molecular sieve, the metal filter screen is clamped between the inner shell and the connecting disc, the oil absorption filter core is wound on the outer side of the inner shell, and the molecular sieve is arranged between the inner shell and the inner shell cover, the air inlet channel is in communication with the air outlet channel through the metal filter screen, the oil absorption filter core and the molecular sieve in sequence.

[0004] According to the above technical scheme, the compressed gas enters the drying cylinder through the air inlet channel, passes through the metal filter screen, the oil absorption filter core and the molecular sieve and flows out from the air outlet channel, the oil and part of the water in the air are filtered through the metal filter screen and the oil absorption filter core, and the remaining water in the compressed air is fully adsorbed through the molecular sieve, so that the drying cylinder realizes multiple adsorption and filtration of oil stains, the metal filter screen is easier to clean than the traditional filter core, when the clean gas reversely enters the drying cylinder from the air outlet channel during the cleaning of the drying cylinder, more water and oil stains can be taken out, and the service life of the drying cylinder is prolonged.

[0005] The utility model is further provided with a lower clamping groove for mounting the metal filter screen, a side clamping groove for mounting the oil absorption filter core and an inner cavity for mounting the molecular sieve on the inner shell, and the inner shell is provided with a gas permeable hole between the inner cavity and the side clamping groove.

[0006] Further, the filter element further comprises a shield and a filter core clamp, the shield, the oil absorption filter core and the filter core clamp are sequentially sleeved at the side clamping groove from inside to outside, and the gas permeable hole is arranged on the inner side of the shield.

[0007] Further, the oil absorption filter core is a filter core piece in a long strip structure, and the oil absorption filter core is wound around the outer surface of the shield in a ring shape.

[0008] Further, the filter core clamp is provided with a matching clamping groove and clamping block at the head and tail thereof, and the oil absorption filter core is clamped in the side clamping groove by the filter core clamp.

[0009] Further, the shroud is provided with a plurality of circumferentially distributed side holes.

[0010] The above technical scheme is adopted, during installation, a plurality of turns of the oil absorption filter core are wound around the outer surface of the shroud, and are fixed by the filter core clamp, so that the oil absorption filter core is fixed between the shroud and the filter core clamp, and deformation of the oil absorption filter core is avoided, and the filtering effect of the drying cylinder is maintained.

[0011] The utility model further sets up, the inner bag shell is located in the inner chamber is equipped with extension, the molecular sieve is clamped in extension.

[0012] The above technical scheme is adopted, the path of airflow flow is increased by the extension, so that the molecular sieve fully filters the moisture in the gas.

[0013] The utility model further sets up, the molecular sieve is located at the air outlet and is equipped with fine filter filter pad, and the fine filter filter pad is equipped with felt or / and glass fiber.

[0014] The above technical scheme is adopted, the strength of the fine filter filter pad is improved by the glass fiber, and the molecular sieve dust is prevented from entering the dryer assembly and the subsequent gas path system.

[0015] The utility model further sets up, the metal filter screen is made of aluminum foil net / stainless steel wire net pressing.

[0016] The above technical scheme is adopted, the metal filter screen is made of a single aluminum foil net / stainless steel wire net wound into a ring shape, or a plurality of aluminum foil net rings / stainless steel wire net rings with increasing diameters are combined into a ring shape, and are fixed by a sintering process, so that the metal filter screen has fine pores for adsorbing oil stains, thereby sharing the work of filtering oil stains by the oil absorption filter core.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] 1. The compressed gas enters the drying cylinder through the air inlet, passes through the metal filter screen, the oil absorption filter core and the molecular sieve, and flows out from the air outlet, the oil and part of the moisture in the air are filtered by the metal filter screen and the oil absorption filter core, and the remaining moisture in the compressed air is fully adsorbed by the molecular sieve, so that the drying cylinder realizes multiple adsorption and filtration of oil stains;

[0019] 2. The metal filter screen has higher strength and is easier to clean than the traditional filter core, when the drying cylinder is cleaned, most of the oil stains and impurities adsorbed on the metal filter screen can be easily brought out by the clean gas entering the drying cylinder from the air outlet in the reverse direction, and the service life of the metal filter screen is longer;

[0020] 3. The internal structure of the inner shell extends the path of compressed air through the molecular sieve, making the output compressed air drier.

[0021] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0022] Figure 1 This is a cross-sectional view of the present invention;

[0023] Figure 2 This is a perspective view of the inner shell of this utility model;

[0024] Figure 3 This is a perspective view of the filter element clamp of this utility model;

[0025] Figure 4 For the present utility model Figure 1 A magnified view of a section at point A in the middle;

[0026] Figure 5 A schematic diagram of the flow path of compressed gas entering this utility model;

[0027] Wherein: 1-Inner liner shell, 2-Outer cylinder shell, 3-Inner liner cover, 4-Connecting plate, 5-Bottom cover, 6-Filter element, 11-Inlet duct, 12-Outlet duct, 13-Lower slot, 14-Side slot, 15-Inner cavity, 16-Ventilation hole, 17-Extension, 61-Metal filter screen, 62-Oil absorption filter element, 63-Molecular sieve, 64-Protective cover, 641-Side hole, 65-Filter element clamp, 651-Slot, 652-Clip block, 66-Fine filter pad; Detailed Implementation

[0028] like Figure 1 As shown, this embodiment provides a multi-stage filtration drying cylinder, including an inner shell 1, an outer shell 2, an inner cap 3, a connecting plate 4, a bottom cap 5, and a filter element 6. The inner shell 1 is fitted onto the outer shell 2, and the upper and lower ends of the inner shell 1 are respectively connected to the inner cap 3 and the connecting plate 4. The connecting plate 4 is fixedly connected to the outer shell 2 through the bottom cap 5. The connecting plate 4 and the inner shell 1 are combined to form an air inlet 11 and an air outlet 12. The filter element 6 includes a metal filter screen 61, an oil-absorbing filter element 62, and a molecular sieve 63. The metal filter screen 61 is snapped between the inner shell 1 and the connecting plate 4. The oil-absorbing filter element 62 is wound around the outside of the inner shell 1. The molecular sieve 63 is disposed between the inner shell 1 and the inner cap 3. The air inlet 11 is connected to the air outlet 12 through the metal filter screen 61, the oil-absorbing filter element 62, and the molecular sieve 63 in sequence.

[0029] Combination Figures 2-4As shown, in the embodiment, the inner container shell 1 is provided with a lower clamping groove 13 for mounting the metal filter screen 61, a side clamping groove 14 for mounting the oil absorption filter element 62, and an inner cavity 15 for mounting the molecular sieve 63, and the inner container shell 1 is provided with a gas permeable hole 16 between the inner cavity 15 and the side clamping groove 14, and the filter element 6 further comprises a protective cover 64 and a filter element clamping hoop 65, the protective cover 64, the oil absorption filter element 62 and the filter element clamping hoop 65 are sequentially sleeved from inside to outside at the side clamping groove 14, the gas permeable hole 16 is arranged on the inner side of the protective cover 64, the oil absorption filter element 62 is a filter element sheet in a long strip structure, and the oil absorption filter element 62 is wound around the outer surface of the protective cover 64 in a ring shape, the filter element clamping hoop 65 is provided with a matching clamping groove 651 and a clamping block 652 at the head and tail, the oil absorption filter element 62 is clamped to the side clamping groove 14 through the filter element clamping hoop 65, the protective cover 64 is provided with circumferentially distributed side holes 641, the inner container shell 1 is provided with an extension 17 at the inner cavity, the molecular sieve 63 is clamped to the extension 17, the molecular sieve 63 is provided with a fine filter pad 66 at the gas outlet 12, the fine filter pad 66 is provided with felt and glass fiber, and the metal filter screen 61 is pressed from an aluminum foil screen / stainless steel screen.

[0030] In combination Figure 5 As shown, the working principle of the utility model is that compressed air enters the drying cylinder from the air inlet 11, passes through the metal filter screen 61, the oil absorption filter element 62 and the molecular sieve 63 and flows out from the air outlet 12, the oil and part of the water in the air are filtered through the metal filter screen 61 and the oil absorption filter element 62, and the remaining water in the compressed air is fully adsorbed through the molecular sieve 63, the metal filter screen 61 is wound into a ring shape from a single aluminum foil screen / stainless steel screen, or a plurality of aluminum foil screen rings / stainless steel screen rings with increasing diameters are combined into a ring shape and are fixed through a sintering process, so that the metal filter screen 61 is staggered with fine pores for adsorbing oil stains, thereby sharing the work of filtering oil stains by the oil absorption filter element 62, realizing multiple adsorption and filtration of oil stains by the drying cylinder, and realizing cleaning and regeneration of the drying cylinder when clean gas reversely enters the drying cylinder from the air outlet 12, so that the impurities in the molecular sieve 63, the oil absorption filter element 62 and the metal filter screen 61 are taken away by the gas, the cleaning and regeneration of the drying cylinder are realized, and the repeated use requirement is met.

[0031] The above are preferred embodiments of the application, which do not limit the protection scope of the application, so that: any equivalent changes made on the structure, shape and principle of the application should be covered within the protection scope of the application.

Claims

1. A multi-stage filtering drying cylinder, comprising an inner shell (1), a cylinder shell (2), an inner shell cover (3), a connecting disc (4), a bottom cover (5) and a filter (6), the inner shell (1) is sleeved with the cylinder shell (2), and the upper and lower ends of the inner shell (1) are respectively connected with the inner shell cover (3) and the connecting disc (4), the connecting disc (4) is fixedly connected to the cylinder shell (2) through the bottom cover (5), and the connecting disc (4) and the inner shell (1) combine to form an air inlet channel (11) and an air outlet channel (12), characterized in that, The filter (6) comprises a metal filter screen (61), an oil absorption filter element (62) and a molecular sieve (63), the metal filter screen (61) is clamped between the inner container shell (1) and the connecting disc (4), the oil absorption filter element (62) is wound outside the inner container shell (1), the molecular sieve (63) is arranged between the inner container shell (1) and the inner container cover (3), and the air inlet channel (11) is in communication with the air outlet channel (12) in sequence through the metal filter screen (61), the oil absorption filter element (62) and the molecular sieve (63).

2. A multi-stage filter-drying cylinder according to claim 1, characterized in that: The inner container shell (1) is provided with a lower clamping groove (13) for mounting the metal filter screen (61), a side clamping groove (14) for mounting the oil absorption filter element (62), and an inner cavity (15) for mounting the molecular sieve (63), and the inner container shell (1) is provided with a breathable hole (16) between the inner cavity (15) and the side clamping groove (14).

3. A multi-stage filter-drying cylinder according to claim 2, characterized in that: The filter (6) further comprises a protective cover (64) and a filter element clamping hoop (65), the protective cover (64), the oil absorption filter element (62) and the filter element clamping hoop (65) are sequentially sleeved from inside to outside at the side clamping groove (14), and the breathable hole (16) is arranged on the inner side of the protective cover (64).

4. A multi-stage filter-drying cylinder according to claim 3, characterized in that: The oil absorption filter element (62) is a filter element sheet in a long strip structure, and the oil absorption filter element (62) is wound around the outer surface of the protective cover (64) in a ring shape.

5. A multi-stage filter-drying cylinder according to claim 3 or 4, characterised in that: The filter element clamping hoop (65) is provided with a matched clamping groove (651) and a clamping block (652) at the head and tail, and the oil absorption filter element (62) is clamped in the side clamping groove (14) through the filter element clamping hoop (65).

6. A multi-stage filter-drying cylinder according to claim 5, characterized in that: The protective cover (64) is provided with circumferentially distributed side holes (641).

7. A multi-stage filter-drying cylinder according to claim 2, characterized in that: The inner container shell (1) is provided with an extension (17) at the inner cavity (15), and the molecular sieve (63) is clamped in the extension (17).

8. A multi-stage filter-drying cylinder according to claim 1, characterized in that: The molecular sieve (63) is provided with a precision filter pad (66) at the air outlet channel (12), and the precision filter pad (66) is provided with felt and / or glass fiber.

9. A multi-stage filter-drying cylinder according to claim 1, characterized in that: The metal filter screen (61) is pressed from an aluminum foil screen or a stainless steel screen.

Images