Multi-stage filtering and drying cylinder

Abstract

The utility model relates to a multistage filtration drying cylinder, which comprises an inner container shell, a cylinder shell, an inner container cover, a connecting disc, a back cover and a filter component, the inner container shell is sleeved with the cylinder shell, the upper end and the lower end of the inner container shell are respectively connected with the inner container cover and the connecting disc, the connecting disc is fixedly connected with the cylinder shell through the back cover, and the connecting disc is respectively provided with an air outlet and an air inlet. The inner container shell is connected with a filtering piece and is provided with an inner cavity corresponding to the air outlet hole, the inner container shell is provided with an outer ring part used for being connected with the one-way piece, an air channel a and an air channel b corresponding to the air inlet hole are formed in the inner container shell through the outer ring part, and the one-way piece is arranged at the air channel b. The main purpose of the utility model is that when compressed air is input from the air inlet hole, the air passage b is blocked due to the action of the one-way piece, so that air flow can only enter from the air passage a, moisture in the air is fully absorbed by the filtering piece assembly, the air flow transmission path is short, and the filtering efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of air dryers, in particular to a multi-stage filtering and drying cartridge. Background Art

[0002] The filter-drying cylinder is mainly used to clean and dry the compressed air in the automobile air brake system, so as to prevent moisture in the air from affecting the braking effect of the automobile. Among them, patent No. CN201922099212.0 discloses a multi-stage filter-drying cylinder, and the installation of the filter element inside it requires accessories such as a mounting seat, a hollow seat, and a baffle, so that the accessories required for its installation are too many, which increases the production cost and the time cost of assembly, and the airflow path is relatively long, which affects the filtration efficiency. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the technical solution adopted by the utility model is: a multi-stage filter drying cartridge, comprising an inner cartridge shell, a cartridge shell, an inner cartridge cover, a connecting plate, a bottom cover and a filter element assembly, the inner cartridge shell is sleeved with the cartridge shell, and the upper and lower ends of the inner cartridge shell are respectively connected to the inner cartridge cover and the connecting plate, the connecting plate is fixedly connected to the cartridge shell through the bottom cover, the connecting plate is respectively provided with an air outlet and an air inlet, the inner cartridge shell is connected to the filter element, the inner cartridge shell is provided with an inner chamber corresponding to the air outlet, and also includes a one-way piece, the inner cartridge shell is provided with an outer ring portion for connecting the one-way piece, the inner cartridge shell forms an airway a and an airway b corresponding to the air inlet through the outer ring portion, and the one-way piece is provided at the airway b.

[0004] By adopting the above technical solution, when compressed air is input from the air inlet, the one-way piece blocks the airway b, so that the airflow can only enter from the airway a, and the filter component fully absorbs the moisture in the gas, the airflow transmission path is short, and the filtering efficiency is improved; when the filter component needs to be cleaned, the clean gas is input from the air outlet, and the one-way piece is opened, so that the clean gas flows out of the air inlet through the airway a and the airway b at the same time, the cleaning efficiency is high, and the service life of the filter component is extended.

[0005] The utility model is further configured such that the inner shell is provided with circumferentially distributed reinforcing ribs between the inner chamber and the outer ring portion, the airway a is formed between adjacent reinforcing ribs, the filter element assembly comprises a molecular sieve, a filter element and a clamp, the inner chamber is connected with the molecular sieve, the outer ring portion is clamped with the filter element via the clamp, and the filter element is arranged at the airway a.

[0006] Furthermore, the inner shell is provided with evenly distributed support rings on the reinforcing ribs, and the inner side surface of the filter element abuts against the support rings.

[0007] By adopting the above technical solution, the inner shell is integrally connected to the outer ring part and the support ring through reinforcing ribs, reducing the number of accessories to improve assembly efficiency. The gap between adjacent support rings is connected to the airway a, the air flow area is large, the filtration efficiency is improved, and the deformation of the filter element is avoided by positioning the support ring. The overall structural design is reasonable.

[0008] The utility model is further configured that a lower filter is provided at the bottom of the molecular sieve, the molecular sieve is clamped between the inner liner shell and the inner liner cover, the inner liner shell is provided with a protrusion for supporting the lower filter, and the protrusion is provided with open grooves distributed in a circumference around the protrusion, and the inner liner cover is provided with a group of fine holes.

[0009] Furthermore, an upper filter is provided on the top of the molecular sieve.

[0010] By adopting the above technical solution, the upper surface of the raised portion is arc-shaped and abuts against the lower filter disc. The airflow passes through the open groove to prevent the lower filter disc from blocking the raised portion. Through the isolation effect of the lower filter disc, the molecular sieve can be prevented from flowing out of the air outlet and blocking dust from entering the inner chamber. The fine pore group can prevent the molecular sieve from flowing out of the inner liner cover and blocking airways a and b, thereby maintaining the stability of the structure.

[0011] The utility model is further configured that the outer ring portion is provided with an annular groove opening toward the cylinder shell, an air passage b is formed between the outer ring portion and the cylinder shell, and the one-way member is clamped at the air passage b through the annular groove.

[0012] Furthermore, the one-way member is a sealing ring, and the sealing ring is provided with a movable portion inclined downward toward the direction of the cartridge shell, and the movable portion abuts against the cartridge shell.

[0013] By adopting the above technical solution, in airway b, when the airflow flows from bottom to top, it is blocked by the movable part and cannot pass through, while when the airflow flows from top to bottom, the air pressure forces the movable part to fold inward, the airflow flows normally, and it has a one-way flow function.

[0014] The utility model is further configured that the filter component also includes a filter block, the filter block is clamped between the inner shell and the connecting plate, and the filter block is arranged at the intersection between the air inlet and the airway a and the airway b.

[0015] Furthermore, the connecting plate is provided with air inlet holes distributed in a circle around the air outlet, and the bottom cover is provided with an inner clamping part and an outer clamping part. The bottom cover is clamped to the air inlet holes through the inner clamping part and is clamped to the cylinder shell through the outer clamping part. A spring is provided between the cylinder shell and the inner liner cover.

[0016] By adopting the above technical solution, the filter block adopts filter materials such as stainless steel wire mesh and aluminum foil, which has the effect of assisting in the adsorption of oil and dirt. When installing the connecting plate, the bottom cover passes through the air inlet hole through the inner clamping part, and the inner clamping part is bent to the upper surface of the connecting plate. The outer edge of the cylinder shell and the outer clamping part are curled and bent, so that the bottom cover and the cylinder shell are locked, and the spring is used to prevent the inner shell from moving toward the cylinder shell, thereby maintaining the stability of the structure.

[0017] Compared with the prior art, the beneficial effects of the utility model are:

[0018] When compressed air is input from the air inlet, the one-way piece blocks airway b, so that the airflow can only enter from airway a, and the filter component fully absorbs the moisture in the gas, the airflow transmission path is short, and the filtering efficiency is improved; when the filter component needs to be cleaned, the clean gas is input from the air outlet, and the one-way piece is opened, so that the clean gas passes through airway a and airway b at the same time and flows out from the air inlet, with high cleaning efficiency, thereby extending the service life of the filter component.

[0019] The embodiments of the utility model are further described below in conjunction with the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a cross-sectional view of the first embodiment of the utility model;

[0021] Figure 2 For the utility model Figure 1 A partial enlarged view of the A direction

[0022] Figure 3 It is a three-dimensional diagram of the inner shell of the utility model;

[0023] Figure 4 It is a cross-sectional view of a second embodiment of the utility model;

[0024] Figure 5 It is a schematic diagram of the airflow direction when drying gas in the utility model;

[0025] Figure 6 A schematic diagram of the airflow direction when cleaning the filter assembly of the utility model;

[0026] Among them: 1-inner shell, 2-cylinder shell, 3-inner cover, 4-connecting plate, 5-bottom cover, 6-filter element assembly, 7-one-way member, 11-air outlet, 12-air inlet, 13-inner chamber, 14-outer ring, 15-airway a, 16-airway b, 17-reinforcement ribs, 18-molecular sieve, 19-filter element, 20-clamp, 21-support ring, 22-annular groove, 23-sealing ring, 24-movable part, 25-lower filter disc, 26-raised part, 27-opening groove, 28-pore group, 29-upper filter disc, 30-filter block, 31-inner clamp, 32-outer clamp, 33-spring; DETAILED DESCRIPTION

[0027] like Figure 1 , 2 As shown, this embodiment provides a multi-stage filter drying cartridge, comprising an inner cartridge shell 1, a cartridge outer shell 2, an inner cartridge cover 3, a connecting plate 4, a bottom cover 5 and a filter element assembly 6, the inner cartridge shell 1 is sleeved with the cartridge outer shell 2, and the upper and lower ends of the inner cartridge shell 1 are respectively connected with the inner cartridge cover 3 and the connecting plate 4, the connecting plate 4 is fixedly connected to the cartridge outer shell 2 through the bottom cover 5, the connecting plate 4 is respectively provided with an air outlet 11 and an air inlet 12, the filter element assembly 6 is installed in the inner cartridge shell 1, the inner cartridge shell 1 is provided with an inner chamber 13 corresponding to the air outlet 11, and also includes a one-way member 7, the inner cartridge shell 1 is provided with an outer ring portion 14 for connecting the one-way member 7, the inner cartridge shell 1 forms an airway a15 and an airway b16 corresponding to the air inlet 12 through the outer ring portion 14, and the one-way member 7 is provided at the airway b16.

[0028] Combination Figure 3 As shown, in this embodiment, the inner shell 1 is provided with circumferentially distributed reinforcing ribs 17 between the inner chamber 13 and the outer ring portion 14, and an airway a15 is formed between adjacent reinforcing ribs 17. The filter component assembly 6 includes a molecular sieve 18, a filter element 19 and a clamp 20. The inner chamber 13 is connected to the molecular sieve 18, the outer ring portion 14 is clamped with the filter element 19 through the clamp 20, and the filter element 19 is arranged at the airway a15. The inner shell 1 is provided with evenly distributed support rings 21 on the reinforcing ribs 17, and the inner side surface of the filter element 19 abuts against the support ring 21. The inner shell 1 is integrally connected to the outer ring portion 14 and the support ring 21 through the reinforcing ribs 17, reducing the number of accessories to improve assembly efficiency. The gap between adjacent support rings 21 is connected to the airway a15, the airflow flow area is large, the filtration efficiency is improved, and the deformation of the filter element 19 is avoided by positioning the support ring 21. The overall structural design is reasonable.

[0029] In this embodiment, the outer ring portion 14 is provided with an annular groove 22 opening toward the cylinder shell 2, and an airway b16 is formed between the outer ring portion 14 and the cylinder shell 2. The one-way member 7 is clamped at the airway b16 through the annular groove 22. The one-way member 7 is a sealing ring 23. The sealing ring 23 is provided with a movable portion 24 inclined downward toward the cylinder shell 2, and the movable portion 24 abuts against the cylinder shell 2. In the airway b16, when the airflow flows from bottom to top, it is blocked by the movable portion 24 and cannot pass through. When the airflow flows from top to bottom, the air pressure forces the movable portion 24 to fold inward, and the airflow flows normally, with a one-way flow function.

[0030] The utility model provides a first embodiment of a molecular sieve 18, wherein a lower filter disc 25 is provided at the bottom of the molecular sieve 18, and the molecular sieve 18 is clamped between the inner liner shell 1 and the inner liner cover 3, and the inner liner shell 1 is provided with a protrusion 26 for supporting the lower filter disc 25, and the protrusion 26 is provided with opening grooves 27 distributed in a circumference around the protrusion 26, and the inner liner cover 3 is provided with a pore group 28, and the upper surface of the protrusion 26 is arc-shaped and abuts against the lower filter disc 25. Through the isolation effect of the lower filter disc 25, the molecular sieve 18 can be prevented from flowing out of the air outlet 11 and dust can be blocked from entering the inner chamber 13, and the pore group 28 can prevent the molecular sieve 18 from flowing out of the inner liner cover 3 and blocking the airway a15 and the airway b16, thereby maintaining the stability of the structure.

[0031] like Figure 4 As shown, the utility model provides a second embodiment of the molecular sieve 18. On the basis of the first embodiment, an upper filter 29 is provided on the top of the molecular sieve 18 to prevent the molecular sieve 18 from flowing out of the inner liner cover 3. It is worth mentioning that, in a test simulating a use environment, when the pore group 28 can block the molecular sieve 18 from flowing out, the upper filter 29 can be removed to reduce costs and improve market competitiveness.

[0032] In this embodiment, the filter element assembly 6 also includes a filter block 30, which is clamped between the inner shell 1 and the connecting plate 4, and the filter block 30 is arranged at the intersection between the air inlet 12 and the airways a15 and b16. The connecting plate 4 is located around the air outlet 11 and is provided with air inlet holes 12 distributed in a circular pattern. The bottom cover 5 is provided with an inner clamping portion 31 and an outer clamping portion 32. The bottom cover 5 is clamped to the air inlet 12 through the inner clamping portion 31, and is clamped to the cartridge shell 2 through the outer clamping portion 32. A spring 33 is provided between the cartridge shell 2 and the inner shell cover 3. If the operating environment is too oily, add a filter block 30 to the inner shell 1. The filter block 30 is made of filter materials such as stainless steel wire mesh and aluminum foil, which has the effect of assisting in the adsorption of oil. When installing the connecting plate 4, the bottom cover 5 passes through the air inlet 12 through the inner clamping portion 31, and the inner clamping portion 31 is bent to the upper surface of the connecting plate 4. The outer edge of the cylinder shell 2 and the outer clamping portion 32 are curled and bent, so that the bottom cover 5 is locked with the cylinder shell 2, and the spring 33 is used to prevent the inner shell 1 from moving toward the cylinder shell 2, thereby maintaining the stability of the structure.

[0033] Combination Figure 5 , 6 As shown, the working principle of the utility model is that when the utility model works normally, compressed air is input from the air inlet 12, and the airway b16 is blocked due to the action of the one-way member 7, so that the airflow can only enter from the airway a15, and the filter element 19 finely filters and absorbs oil and dirt, and then the molecular sieve 18 fully absorbs moisture in the gas, and the filtered dry gas flows out from the air outlet 11 and is used for automobile braking; when it is necessary to clean the filter assembly, the clean gas flows in from the air outlet 11 in the reverse direction, taking away the moisture in the molecular sieve 18, and the active part 24 of the one-way member 7 is forced to fold inward by the action of air pressure, so that the clean gas flows out from the air inlet 12 through the airways a15 and b16 at the same time, thereby extending the service life.

[0034] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A multi-stage filter drying cartridge, comprising an inner shell (1), an outer shell (2), an inner shell cover (3), a connecting plate (4), a bottom cover (5) and a filter element assembly (6), wherein the inner shell (1) is sleeved with the outer shell (2), and the upper and lower ends of the inner shell (1) are respectively connected to the inner shell cover (3) and the connecting plate (4), the connecting plate (4) is fixedly connected to the outer shell (2) through the bottom cover (5), the connecting plate (4) is respectively provided with an air outlet (11) and an air inlet (12), the inner shell (1) is connected with the filter element assembly (6), and the inner shell (1) is provided with an inner chamber (13) corresponding to the air outlet (11), characterized in that: The invention also comprises a one-way piece (7), the inner shell (1) being provided with an outer ring portion (14) for connecting with the one-way piece (7), the inner shell (1) forming an air passage a (15) and an air passage b (16) corresponding to the air inlet hole (12) through the outer ring portion (14), and the one-way piece (7) being arranged at the air passage b (16).

2. A multi-stage filter-dryer cartridge according to claim 1, characterized in that: The inner shell (1) is provided with circumferentially distributed reinforcing ribs (17) between the inner chamber (13) and the outer ring portion (14), and the airway a (15) is formed between adjacent reinforcing ribs (17). The filter element assembly (6) comprises a molecular sieve (18), a filter element (19) and a clamp (20). The inner chamber (13) is connected to the molecular sieve (18), the outer ring portion (14) is clamped with the filter element (19) via the clamp (20), and the filter element (19) is arranged at the airway a (15).

3. A multi-stage filter-dryer cartridge according to claim 2, characterized in that: The inner shell (1) is provided with evenly distributed support rings (21) on the reinforcing ribs (17), and the inner side surface of the filter element (19) abuts against the support rings (21).

4. A multi-stage filter-dryer cartridge according to claim 3, characterized in that: A lower filter disc (25) is provided at the bottom of the molecular sieve (18), and the molecular sieve (18) is clamped between the inner liner shell (1) and the inner liner cover (3). The inner liner shell (1) is provided with a protrusion (26) for supporting the lower filter disc (25), and the protrusion (26) is provided with open grooves (27) distributed in a circumferential manner around the periphery, and the inner liner cover (3) is provided with a pore group (28).

5. A multi-stage filter-dryer cartridge according to claim 4, characterized in that: An upper filter plate (29) is provided on the top of the molecular sieve (18).

6. The multi-stage filter-dryer cartridge according to claim 1, characterized in that: The outer ring portion (14) is provided with an annular groove (22) opening toward the cartridge housing (2), an air passage b (16) is formed between the outer ring portion (14) and the cartridge housing (2), and the one-way member (7) is clamped at the air passage b (16) via the annular groove (22).

7. The multi-stage filter-dryer cartridge according to claim 6, characterized in that: The one-way member (7) is a sealing ring (23), and the sealing ring (23) is provided with a movable portion (24) inclined downward in the direction of the cartridge housing (2), and the movable portion (24) abuts against the cartridge housing (2).

8. The multi-stage filter-dryer cartridge according to claim 2, characterized in that: The filter element assembly (6) further comprises a filter block (30), wherein the filter block (30) is clamped between the inner shell (1) and the connecting plate (4), and the filter block (30) is arranged at the intersection between the air inlet hole (12) and the airway a (15) and the airway b (16).

9. The multi-stage filter-dryer cartridge according to claim 8, characterized in that: The connecting plate (4) is provided with air inlet holes (12) distributed in a circumferential manner around the air outlet hole (11); the bottom cover (5) is provided with an inner clamping portion (31) and an outer clamping portion (32); the bottom cover (5) is clamped to the air inlet hole (12) through the inner clamping portion (31) and is clamped to the cartridge shell (2) through the outer clamping portion (32); a spring (33) is provided between the cartridge shell (2) and the inner liner cover (3).

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