Long-stroke filtering type drying cylinder

Abstract

The utility model relates to a long-stroke filtering type drying cylinder which comprises a cylinder shell, a filtering piece, an inner container cover, an inner container shell and a connecting disc, the inner container cover, the inner container shell and the connecting disc are sequentially arranged in the cylinder shell in a sleeved mode from top to bottom, the connecting disc is provided with an air inlet channel and an air outlet channel, and the inner container shell and the inner container cover are combined to form an outer ring cavity and an inner ring cavity which are communicated with the air inlet channel and the air outlet channel respectively. An outer ring cavity and an inner ring cavity are formed in the inner container cover, a through connection cavity communicated with the outer ring cavity and the inner ring cavity is formed between the inner container cover and the cylinder shell, and the filtering pieces are arranged in the outer ring cavity and the inner ring cavity. The main purpose of the utility model is that compressed air enters the drying cylinder from the air inlet channel, sequentially passes through the outer ring cavity, the through connection cavity and the inner ring cavity and then flows out from the air outlet channel; the outer ring cavity and the inner ring cavity are two independent filtering areas, so that the stroke of compressed air passing through the filtering piece is increased, and the water absorption effect of the drying cylinder on the compressed air is improved.

Description

Technical Field

[0001] This utility model relates to the technical field of air dryers, and in particular to a long-stroke filter-type drying cylinder. Background Technology

[0002] The filter drying cylinder is mainly used to clean and dry the compressed air in the automotive air braking system. Patent number CN201820380584.3 discloses an oil filter drying cylinder for an air dryer. In this case, the airflow passes through the molecular sieve for a short distance, which prevents the upper molecular sieve from directly participating in the adsorption of moisture, resulting in a waste of the molecular sieve and a poor drying effect of the drying cylinder. Utility Model Content

[0003] To overcome the shortcomings of the prior art, the technical solution adopted by this utility model is: a long-stroke filter drying cylinder, including a cylinder shell and a filter element, and an inner liner cover, an inner liner shell and a connecting plate arranged sequentially from top to bottom inside the cylinder shell. The connecting plate is provided with an air inlet and an air outlet. The inner liner shell and the inner liner cover are combined to form an outer ring cavity and an inner ring cavity that are respectively connected to the air inlet and the air outlet. A transition cavity connecting the outer ring cavity and the inner ring cavity is formed between the inner liner cover and the cylinder shell. The filter element is disposed in the outer ring cavity and the inner ring cavity.

[0004] Using the above technical solution, after the compressed gas enters the drying cylinder from the inlet, it passes through the outer annular cavity, the transition cavity, and the inner annular cavity in sequence before flowing out from the outlet. The outer annular cavity and the inner annular cavity are two independent filtration zones, which increases the travel distance of the compressed gas through the filter element, thereby improving the water absorption effect of the drying cylinder on the compressed gas.

[0005] The present invention is further configured to include a coarse filter element, a fine filter element, and a filter element clamp. The inner shell is provided with a lower clamping groove and a side clamping groove. The coarse filter element is clamped in the lower clamping groove, and the fine filter element is clamped in the side clamping groove by the filter element clamp.

[0006] Using the above technical solution, both the coarse filter element and the fine filter element are located at the air inlet, mainly used to adsorb oil stains in the compressed gas, so as to realize multi-stage filtration of the compressed gas by the drying cylinder.

[0007] The present invention is further configured such that the inner liner cover is provided with a spring groove, a circular groove and a snap-fit ​​part from the inside to the outside, the spring groove abuts against the outer shell of the cylinder by a spring, and the inner liner shell is provided with an inner snap ring and an outer snap ring that snap with the circular groove and the snap-fit ​​part, and the inner liner cover is sealed to the inner liner shell by the inner snap ring and the outer snap ring respectively.

[0008] Furthermore, the inner liner cover is provided with a first vent hole and a second vent hole for connecting the outer ring cavity / inner ring cavity and the transition cavity.

[0009] Furthermore, the inner shell is provided with a third vent hole for connecting the outer ring cavity and the air inlet, and a fourth vent hole for connecting the inner ring cavity and the air outlet.

[0010] Furthermore, both the inner and outer retaining rings are provided with a first sealing ring and a second sealing ring. The inner retaining ring is sealed to the inner liner cover through the first sealing ring, and the outer retaining ring is sealed to the outer cylinder shell through the second sealing ring.

[0011] By adopting the above technical solution, the internal space of the inner shell is divided into a circular outer ring cavity and a cylindrical inner ring cavity by an inner retaining ring and a circular groove. The inner retaining ring is sealed to the circular groove, and the inner and outer sides of the outer retaining ring are respectively sealed to the retaining part and the outer shell, so that the compressed gas flow path is uniform and the filtration effect of the drying cylinder is maintained.

[0012] The present invention is further configured such that the filter element includes a first water-absorbing component and a second water-absorbing component respectively disposed in the outer ring cavity and the inner ring cavity.

[0013] Furthermore, the first water-absorbing component includes a molecular sieve a, an outer partition and a molecular sieve b connected in sequence, and the second water-absorbing component includes a molecular sieve c, an inner partition and a molecular sieve d connected in sequence.

[0014] Using the above technical solution, the molecular sieve is a water-absorbing filter element with countless small pores, used to adsorb moisture in the air. Various types of molecular sieves are placed in the outer and inner ring cavities according to actual needs, and the mixing of adjacent molecular sieves is avoided by the outer / inner partitions to maintain the stability of the structure. Compared with the drying cylinder of a single type of molecular sieve, its filtration effect is more significant.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] After the compressed gas enters the drying cylinder through the inlet, it passes through the outer annular cavity, the transition cavity, and the inner annular cavity in sequence before flowing out through the outlet. The outer annular cavity and the inner annular cavity are two independent filtration zones, which increases the travel distance of the compressed gas through the filter element, thereby improving the water absorption effect of the drying cylinder on the compressed gas.

[0017] The embodiments of this utility model will be further described below with reference to the accompanying drawings. Attached Figure Description

[0018] Figure 1 This is a cross-sectional view of the first embodiment of the present invention;

[0019] Figure 2 For the present utility model Figure 1 A magnified view of the central A-direction view;

[0020] Figure 3 This is a perspective view of the inner shell of this utility model;

[0021] Figure 4 This is a cross-sectional view of the second embodiment of the present invention;

[0022] Figure 5 A schematic diagram of the flow path of compressed gas entering this utility model;

[0023] Wherein: 1-outer shell, 2-filter element, 3-inner liner cover, 4-inner liner shell, 5-connecting disc, 6-coarse filter element, 7-fine filter element, 8-filter element clamp, 11-air inlet, 12-outer annular cavity, 13-transfer cavity, 14-inner annular cavity, 15-air outlet, 21-first water absorption assembly, 22-second water absorption assembly, 23-molecular sieve a, 24-outer partition, 25-molecular sieve b, 26-molecular sieve c, 27-inner partition, 28-molecular sieve d, 31-spring groove, 32-circular groove, 33-clamping part, 34-first vent hole, 35-second vent hole, 41-inner retaining ring, 42-outer retaining ring, 43-third vent hole, 44-fourth vent hole, 45-first sealing ring, 46-second sealing ring, 47-lower retaining groove, 48-side retaining groove; Detailed Implementation

[0024] like Figure 1 As shown, the present invention provides a first embodiment of a long-stroke filter drying cylinder, including a cylinder shell 1 and a filter element 2, and an inner liner cover 3, an inner liner shell 4 and a connecting plate 5 sequentially sleeved inside the cylinder shell 1 from top to bottom. The connecting plate 5 is provided with an air inlet 11 and an air outlet 15. The inner liner shell 4 and the inner liner cover 3 are combined to form an outer ring cavity 12 and an inner ring cavity 14 that are respectively connected to the air inlet 11 and the air outlet 15. A transition cavity 13 is formed between the inner liner cover 3 and the cylinder shell 1, which connects the outer ring cavity 12 and the inner ring cavity 14. The filter element 2 is disposed in the outer ring cavity 12 and the inner ring cavity 14.

[0025] Combination Figure 2 , 3As shown, in this embodiment, the inner liner cover 3 is provided with a spring groove 31, a circular annular groove 32, and a snap-fit ​​part 33 from the inside out. The spring groove 31 abuts against the outer shell 1 via a spring. The inner shell 4 is provided with an inner snap ring 41 and an outer snap ring 42 that snap into the circular annular groove 32 and the snap-fit ​​part 33, respectively. The inner liner cover 3 is sealed to the inner shell 4 via the inner snap ring 41 and the outer snap ring 42, respectively. The inner liner cover 3 is provided with a first vent 34 and a second vent 35 for connecting the outer annular cavity 12 / inner annular cavity 14 and the transition cavity 13. The inner shell 4 is provided with a third vent 43 for connecting the outer annular cavity 12 and the air inlet 11, and a third vent 43 for connecting the inner annular cavity 12 and the air inlet 11, as well as a third vent 45 for connecting the inner annular cavity 12 / inner annular cavity 14 and the transition cavity 13. The fourth vent hole 44 of cavity 14 and air outlet 15, the inner retaining ring 41 and the outer retaining ring 42 are both provided with a first sealing ring 45 and a second sealing ring 46. The inner retaining ring 41 is sealed to the inner liner cover 3 through the first sealing ring 45, and the outer retaining ring 42 is sealed to the outer shell 1 through the second sealing ring 46. The filter element 2 includes a first water absorption component 21 and a second water absorption component 22 respectively provided in the outer ring cavity 12 and the inner ring cavity 14. The first water absorption component 21 includes a molecular sieve a23, an outer partition 24 and a molecular sieve b25 connected in sequence. The second water absorption component 22 includes a molecular sieve c26, an inner partition 27 and a molecular sieve d28 connected in sequence.

[0026] like Figure 4 As shown, this utility model provides a second embodiment of a long-stroke filter drying cylinder. The difference from the first embodiment is that it also includes a coarse filter element 6, a fine filter element 7, and a filter element clamp 8. The inner shell 4 is provided with a lower clamping groove 47 and a side clamping groove 48. The coarse filter element 6 is clamped in the lower clamping groove 47, and the fine filter element 7 is clamped in the side clamping groove 48 by the filter element clamp 8. Both the coarse filter element 6 and the fine filter element 7 are located at the air inlet 11.

[0027] Combination Figure 5 As shown, the working principle of this utility model is as follows: after the compressed gas enters the drying cylinder from the air inlet 11, it passes through the coarse filter element 6 and the fine filter element 7 to adsorb the oil in the gas. Then, it flows into the outer ring cavity 12 through the third vent hole 43, adsorbs moisture through molecular sieves a23 and b25, and then flows into the transfer cavity 13 through the first vent hole 34. It then flows into the inner ring cavity 14 through the second vent hole 35, adsorbs moisture through molecular sieves c26 and d28, and then flows into the air outlet 15 through the fourth vent hole 44. This increases the stroke of the compressed gas through the filter element 2 and improves the water absorption effect.

[0028] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A long-stroke filter-type drying cylinder, comprising a cylinder shell (1) and a filter element (2), and an inner liner cover (3), an inner liner shell (4), and a connecting plate (5) sequentially fitted inside the cylinder shell (1) from top to bottom, the connecting plate (5) being provided with an air inlet (11) and an air outlet (15), characterized in that, The inner shell (4) and the inner cover (3) are combined to form an outer ring cavity (12) and an inner ring cavity (14) that are respectively connected to the air inlet (11) and the air outlet (15). The inner cover (3) and the outer shell (1) form a transition cavity (13) that connects the outer ring cavity (12) and the inner ring cavity (14). The filter element (2) is provided in the outer ring cavity (12) and the inner ring cavity (14).

2. The long-stroke filter-type drying cylinder according to claim 1, characterized in that: It also includes a coarse filter element (6), a fine filter element (7) and a filter element clamp (8). The inner shell (4) is provided with a lower clamping groove (47) and a side clamping groove (48). The coarse filter element (6) is clamped in the lower clamping groove (47), and the fine filter element (7) is clamped in the side clamping groove (48) through the filter element clamp (8).

3. A long-stroke filter-type drying cylinder according to claim 1 or 2, characterized in that: The inner liner cover (3) is provided with a spring groove (31), an annular groove (32) and a snap-fit ​​part (33) from the inside to the outside. The spring groove (31) abuts against the outer shell (1) by a spring. The inner shell (4) is provided with an inner snap ring (41) and an outer snap ring (42) that snap into the annular groove (32) and the snap-fit ​​part (33). The inner liner cover (3) is sealed to the inner shell (4) by the inner snap ring (41) and the outer snap ring (42) respectively.

4. A long-stroke filter-type drying cylinder according to claim 3, characterized in that: The inner liner cover (3) is provided with a first vent (34) and a second vent (35) for connecting the outer ring cavity (12) / inner ring cavity (14) and the transition cavity (13).

5. A long-stroke filter-type drying cylinder according to claim 4, characterized in that: The inner shell (4) is provided with a third vent (43) for connecting the outer ring cavity (12) and the air inlet (11), and a fourth vent (44) for connecting the inner ring cavity (14) and the air outlet (15).

6. A long-stroke filter-type drying cylinder according to claim 5, characterized in that: Both the inner retaining ring (41) and the outer retaining ring (42) are provided with a first sealing ring (45) and a second sealing ring (46). The inner retaining ring (41) is sealed to the inner liner cover (3) through the first sealing ring (45), and the outer retaining ring (42) is sealed to the outer shell (1) through the second sealing ring (46).

7. A long-stroke filter-type drying cylinder according to claim 1 or 2, characterized in that: The filter element (2) includes a first water-absorbing component (21) and a second water-absorbing component (22) respectively disposed in the outer ring cavity (12) and the inner ring cavity (14).

8. A long-stroke filter-type drying cylinder according to claim 7, characterized in that: The first water-absorbing component (21) includes a molecular sieve a (23), an outer partition (24) and a molecular sieve b (25) connected in sequence, and the second water-absorbing component (22) includes a molecular sieve c (26), an inner partition (27) and a molecular sieve d (28) connected in sequence.

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