CN107243212B

CN107243212B - Filter

Info

Publication number: CN107243212B
Application number: CN201710528226.2A
Authority: CN
Inventors: 任建明; 王全民; 夏家引; 竺鹏飞
Original assignee: Ningbo Quansheng Century Pneumatic Technology Co ltd
Current assignee: Ningbo Quansheng Century Pneumatic Technology Co ltd
Priority date: 2017-07-01
Filing date: 2017-07-01
Publication date: 2023-01-06
Anticipated expiration: 2037-07-01
Also published as: CN107243212A

Abstract

The invention discloses a filter, which comprises a filter body and a water cup, wherein a filtering component and a drainage mechanism are arranged in the water cup, the drainage mechanism comprises a cylinder body, a balanced air pressure cavity is formed in the cylinder body, one end of the cylinder body is provided with a piston, the other end of the cylinder body is connected with a drainage base, a water storage cavity is formed between the drainage base and the water cup, the piston is provided with a first channel, the piston is provided with a first connecting channel, the piston is provided with a throttling valve seat, and the throttling valve seat is provided with a throttling channel; the drainage base is provided with a drainage plunger, a drainage groove is formed between the drainage base and the drainage plunger, the drainage base is provided with a second connecting channel, the drainage plunger is provided with a second channel, an exhaust groove is formed between the piston and the drainage base, the drainage base is connected with a fixed seat, the fixed seat is provided with a drainage plug, and the drainage plug is provided with a third channel. The invention can be manually and automatically controlled, realizes timing drainage, has simple structure, low production cost, convenient disassembly and maintenance and long service life.

Description

Filter

Technical Field

The invention relates to the technical field of pneumatic elements, in particular to a filter.

Background

In the field of pneumatic elements, a compressed air filter is an air source processing element for filtering and discharging moisture in compressed air, the humidity of the processed compressed air is reduced, and the inner wall of a pipeline and a valve core of a pneumatic control component can be prevented from being rusted. The compressed air filter mainly comprises a filter body, a filter element, a water cup and a drainage mechanism, wherein a compressed air inlet and a compressed air outlet are formed in the filter body, compressed air enters the filter body from the inlet, and is filtered by the filter element, dry air is discharged from the outlet, moisture is collected in the water cup, and water in the water cup is finally discharged from the drainage mechanism.

The common drainage mechanism of the compressed air filter comprises a manual drainage valve, a spring type drainage mechanism and a float type automatic drainage mechanism. The manual drain valve has the simplest structure, the valve is opened by hand when water needs to be drained, and the valve is closed after the water is drained. A knob type small ball valve, a button type top needle valve and the like are commonly used. This type of valve is simple in design, as long as the sealing problem is solved. The manual valve must be manually operated, and the water level must be periodically checked and drained in time. If the drainage is not timely, secondary pollution can be caused, the water filtering effect cannot be achieved, the manual drain valve is low in cost, the drainage is rapid, normal work is not influenced, and the manual maintenance cost is high. The spring type drainage mechanism is used for jacking the valve core by the spring to drain water when no air pressure or extremely low air pressure exists. When air pressure exists, the valve core is pressed to the O-shaped sealing ring, and water drainage is stopped. The spring type drainage mechanism has the advantages that air is required to be stopped during drainage, the spring type drainage mechanism can be only used in certain places where air can be stopped frequently, manual control is not needed, and the manufacturing cost is low.

The float-type automatic drainage mechanism is characterized in that a float is arranged in a water cup, the upper end of the float bears the pressure of compressed air, the lower end of the float bears the buoyancy of water, when the water level in the water cup rises to enable the buoyancy of the lower end of the float to be larger than the pressure of the upper end, the float moves upwards and controls to open a drainage outlet, and when the water level drops to enable the buoyancy of the lower end of the float to be smaller than the pressure of the upper end, the float moves downwards and controls the drainage outlet to be closed, so that automatic drainage is achieved. The float-type automatic drainage mechanism has the advantages of complex structure, short service life, high production cost and difficult disassembly and assembly maintenance.

Disclosure of Invention

Aiming at the defects of the prior art, the filter is provided, can be manually and automatically controlled, realizes timing drainage, and has the advantages of simple structure, low production cost, convenience in disassembly, assembly and maintenance and long service life.

In order to achieve the above object, the present invention provides the following technical solutions.

A filter comprises a filter body and a water cup arranged on the filter body, wherein a filtering component fixedly connected with the filter body is arranged in the water cup, a drainage mechanism is arranged in the water cup and comprises a cylinder body, a balance air pressure cavity is formed in the cylinder body, a piston is arranged at one end of the cylinder body, the other end of the cylinder body is connected with a drainage base, a water storage cavity is formed between the drainage base and the water cup, the piston is movably arranged in the cylinder body through an upper cover, a first spring is arranged between the piston and the drainage base, a first channel is arranged in the middle of the piston, a first connecting channel for communicating the first channel with the balance air pressure cavity is arranged on the side wall of the piston, a throttling valve seat is arranged on the piston, and a throttling channel communicated with the first channel is arranged in the middle of the throttling valve seat; be equipped with the drainage plunger in the drainage base, form the water drainage tank between drainage base and the drainage plunger, be equipped with the second interface channel with water drainage tank and water storage chamber intercommunication on the drainage base lateral wall, be equipped with the second passageway that is linked together with the first passageway in the middle of the drainage plunger, form the air discharge duct between piston and the drainage base, the second passageway passes through air discharge duct and balanced atmospheric pressure chamber intercommunication, drainage base end-to-end connection has the fixing base, be equipped with the drain cock in the fixing base, be equipped with the second spring between drain cock and the drainage plunger, be equipped with the third passageway with second passageway and water drainage tank and external intercommunication in the middle of the drain cock.

Furthermore, a throttling valve needle matched with the throttling channel is arranged in the first channel, and the matching end of the throttling valve needle and the throttling channel is conical.

Further, the throttle valve needle is rotatably arranged in the first channel through threads.

Furthermore, a third spring which is abutted against the drainage bolt is arranged in the fixed seat, and the tail end of the drainage bolt is connected with a pull cap.

Furthermore, the upper cover is also provided with a filter disc.

Furthermore, the filtering component comprises cyclone blades, a filter element, a water retaining block and a fixed rod, the water retaining block is arranged at the lower end of the fixed rod, the upper end of the fixed rod is fixedly connected with the filter body, the filter element is sleeved on the fixed rod through the water retaining block, and the cyclone blades are sleeved outside the filter element.

Further, the filter body is provided with an air inlet and an air outlet, and the air inlet and the air outlet are respectively communicated with the water cup.

The invention has the beneficial effects that: when the filter works, air enters through the air inlet, the filter component filters liquid oil and water and solid pollutants in the air to the water storage cavity, meanwhile, the air pressure in the water cup rises to push the piston to move downwards, so that the piston, the drainage base and the drainage bolt are tightly abutted, the exhaust groove and the drainage groove are sealed, the air enters the balance air pressure cavity through the throttling channel, when the pressure in the balance air pressure cavity is balanced with the air pressure in the water cup, the piston resets, meanwhile, the drainage plug resets under the action of the second spring, so that the exhaust groove and the drainage groove are opened, oil and water in the water storage cavity are discharged from the channel through the drainage groove, and automatic drainage is realized, meanwhile, air in the balanced air pressure cavity is exhausted from the channel through the exhaust groove, so that the air pressure in the balanced air pressure cavity is smaller than that in the water cup, the piston moves downwards, the exhaust groove and the drainage groove are sealed again, the throttle valve needle is rotated to control the opening of the throttle channel, the air inlet speed in the balanced air pressure cavity is controlled, timed exhaust is realized, the structure is simple, the production cost is low, disassembly, assembly and maintenance are convenient, the service life is long, the tail end of the drainage bolt is connected with the pull cap, manual control drainage is realized through the pull-down pull cap, when the throttle valve needle is adjusted to be tightly abutted to the throttle channel, the throttle channel is closed, air cannot be introduced into the balanced air pressure cavity, automatic exhaust is closed, at the moment, the manual pull-down pull cap can be used for manually controlling drainage.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic view of the drain tank and the exhaust tank of the present invention when they are closed.

In the drawings, 1. A filter body; 2. a water cup; 3. a cylinder body; 4. a balance air pressure cavity; 5. a piston; 6. a drainage base; 7. a water storage cavity; 8. an upper cover; 9. a first spring; 10. a first channel; 11. a first connecting passage; 12. a throttle valve seat; 13. a throttling channel; 14. a drainage plunger; 15. a water discharge tank; 16. a second connecting channel; 17. a second channel; 18. an exhaust groove; 19. a fixed seat; 20. a drain plug; 21. a second spring; 22. a third channel; 23. a throttling valve needle; 24. a third spring; 25. pulling the cap; 26. a filter disc; 27. a cyclone blade; 28. a filter element; 29. a water retaining block; 30. fixing the rod; 31. an air inlet; 32. and (7) an exhaust port.

Detailed Description

The invention is further explained by combining the attached drawings.

Referring to fig. 1 and 2, the filter comprises a filter body 1 and a water cup 2 arranged on the filter body 1, wherein a sealing ring is arranged between the filter body 1 and the water cup 2 to ensure good sealing performance, an air inlet 31 and an air outlet 32 are arranged on the filter body 1, the air inlet 31 and the air outlet 32 are respectively communicated with the water cup 2, a filtering component fixedly connected with the filter body 1 is arranged in the water cup 2, the filtering component comprises a cyclone blade, a filter element 28, a water retaining block 29 and a fixing rod 30, the water retaining block 29 is arranged at the lower end of the fixing rod 30, the upper end of the fixing rod 30 is fixedly connected with the filter body, the filter element 28 is sleeved on the fixing rod 30 through the water retaining block 29, and the cyclone blade 27 is sleeved outside the filter element 28.

Be equipped with drainage mechanism in the drinking cup 2, drainage mechanism includes cylinder body 3, form balanced atmospheric pressure chamber 4 in the

cylinder body

3, 3 one end of cylinder body is equipped with piston 5, the cylinder body 3 other end is connected with drainage base 6, form water storage chamber 7 between drainage base 6 and the drinking cup 2, piston 5 sets up in cylinder body 3 through 8 activities of upper cover, still be equipped with filter 26 on the upper cover 8, filter 26's effect lies in filtering the compressed air that enters into balanced atmospheric pressure chamber 4 from 2 inner chambers of drinking cup through the air gap, prevent among the compressed air that foreign particles blockked up the air gap, in order to ensure drainage mechanism normal work.

A first spring 9 is arranged between the piston 5 and the drainage base 6, a first channel 10 is arranged in the middle of the piston 5, a first connecting channel 11 which communicates the first channel 10 with the balance air pressure cavity 4 is arranged on the side wall of the piston 5, a throttling valve seat 12 is arranged on the piston 5, a throttling channel 13 which communicates with the first channel 10 is arranged in the middle of the throttling valve seat 12, a throttling valve needle 23 which is matched with the throttling channel 13 is arranged in the first channel 10, the matching end of the throttling valve needle 23 and the throttling channel 13 is conical, the throttling valve needle 23 is rotatably arranged in the first channel 10 through threads, and the opening degree of the throttling channel 13 is changed by rotating the throttling valve needle 23.

A drainage plunger 14 is arranged in the drainage base 6, a drainage groove 15 is formed between the drainage base 6 and the drainage plunger 14, a second connecting channel 16 which is used for communicating the drainage groove 15 with the water storage cavity 7 is arranged on the side wall of the drainage base 6, a second channel 17 which is communicated with the first channel 10 is arranged in the middle of the drainage plunger 14, an exhaust groove 18 is formed between the piston 5 and the drainage base 6, the second channel 17 is communicated with the balance air pressure cavity 4 through the exhaust groove 18, a fixing seat 19 is connected to the tail end of the drainage base 6, a drainage bolt 20 is arranged in the fixing seat 19, a second spring 21 is arranged between the drainage bolt 20 and the drainage plunger 14, and a third channel 22 which is used for communicating the second channel 17 and the drainage groove 15 with the outside is arranged in the middle of the drainage bolt 20.

When the filter works, air enters through the air inlet 31 and rotates strongly through the gap in the tangential direction of the cyclone blade 27, liquid oil water and solid pollutants in the compressed air are thrown onto the side wall of the water cup 2 under the action of centrifugal force and then flow to the water storage cavity 7 along the wall surface of the water cup 2, and the compressed air is filtered by the filter element 28 and then is discharged from the air source outlet to provide a dry and clean air source for the pneumatic control system. The water stopper 29 functions to prevent compressed air with oil, water or other foreign substances from entering the filter element 28 from the lower end of the filter element 28.

Meanwhile, the air pressure in the water cup 2 rises to push the piston 5 to compress the first spring 9 to move downwards, the piston 5 moves downwards to drive the drainage plunger 14 to compress the second spring 21 until the piston 5 and the drainage plunger 14 are tightly abutted against the drainage bolt 20 to seal the exhaust groove 18 and the drainage groove 15, and sealing rings are arranged between the piston 5 and the drainage plunger 14 and between the drainage plunger 14 and the drainage bolt 20 to ensure good sealing effect. At the moment, air enters the balance air pressure cavity 4 through the throttling channel 13, the first channel 10 and the first connecting channel 11, when the pressure in the balance air pressure cavity 4 is balanced with the pressure in the water cup 2, the piston 5 is reset under the action of the first spring 9, the drainage plunger 14 is reset under the action of the second spring 21, so that the exhaust groove 18 and the drainage groove 15 are opened, oil and water in the water storage cavity 7 are discharged from the third channel 22 through the second connecting channel 16 and the drainage groove 15, automatic drainage is realized, meanwhile, the air in the balance air pressure cavity 4 is discharged through the exhaust groove 18, the second channel 17 and the third channel 22, so that the pressure in the balance air pressure cavity 4 is smaller than the pressure in the water cup 2, the piston 5 moves downwards, the exhaust groove 18 and the drainage groove 15 are sealed again, drainage is closed, and by controlling the opening degree of the throttling channel 13, the air inlet speed in the balance air pressure cavity 4 is controlled, timed drainage is achieved, the structure is simple, the production cost is low, disassembly, assembly and maintenance are convenient, the service life is long, in addition, a third spring 24 abutting against the drainage bolt 20 is arranged in the fixing seat 19, the tail end of the drainage bolt 20 is connected with a pull cap 25, when the adjusting throttling valve needle 23 abuts against the throttling channel 13 tightly, the throttling channel 13 is closed, air cannot be fed into the balance air pressure cavity 4, automatic drainage is closed, at the moment, the drainage bolt 20 is driven to compress the third spring 24 to move downwards through pulling the pull cap 25 manually, the drainage bolt 20 is separated from the drainage plunger 14, the drainage groove 15 is opened, oil and water in the water storage cavity 7 can be drained out of the third channel 22 through the second connecting channel 16 and the drainage groove 15, manual control drainage is achieved, after drainage is completed, the pull cap 25 is loosened, and the drainage bolt 20 resets under the action of the third spring 24.

The above description is only a preferred embodiment of the present invention, and all equivalent changes or modifications of the structure, characteristics and principles described in the present invention are included in the scope of the present invention.

Claims

1. The utility model provides a filter, includes filter body (1) and locates drinking cup (2) on filter body (1), be equipped with in drinking cup (2) with filter body (1) fixed connection's filtering component, its characterized in that: a drainage mechanism is arranged in the water cup (2), the drainage mechanism comprises a cylinder body (3), a balance air pressure cavity (4) is formed in the cylinder body (3), a piston (5) is arranged at one end of the cylinder body (3), the other end of the cylinder body (3) is connected with a drainage base (6), a water storage cavity (7) is formed between the drainage base (6) and the water cup (2), the piston (5) is movably arranged in the cylinder body (3) through an upper cover (8), a first spring (9) is arranged between the piston (5) and the drainage base (6), a first channel (10) is arranged in the middle of the piston (5), a first connecting channel (11) which is used for communicating the first channel (10) with the balance air pressure cavity (4) is arranged on the side wall of the piston (5), a throttling valve seat (12) is arranged on the piston (5), and a throttling channel (13) which is communicated with the first channel (10) is arranged in the middle of the throttling valve seat (12); be equipped with drainage plunger (14) in drainage base (6), form water drainage tank (15) between drainage base (6) and drainage plunger (14), be equipped with second connecting channel (16) with water drainage tank (15) and water storage chamber (7) intercommunication on drainage base (6) lateral wall, be equipped with second passageway (17) that are linked together with first passageway (10) in the middle of drainage plunger (14), form air discharge duct (18) between piston (5) and drainage base (6), second passageway (17) are through air discharge duct (18) and balanced atmospheric pressure chamber (4) intercommunication, drainage base (6) end-to-end connection has fixing base (19), be equipped with drainage bolt (20) in fixing base (19), be equipped with second spring (21) between drainage bolt (20) and drainage plunger (14), be equipped with third passageway (22) with second passageway (17) and water discharge duct (15) and external intercommunication in the middle of drainage bolt (20).

2. A filter according to claim 1, wherein: a throttling valve needle (23) matched with the throttling channel (13) is arranged in the first channel (10), and the matching end of the throttling valve needle (23) and the throttling channel (13) is conical.

3. A filter according to claim 2, wherein: the throttling valve needle (23) is rotatably arranged in the first channel (10) through threads.

4. A filter according to claim 1, wherein: a third spring (24) which is propped against the drainage bolt (20) is arranged in the fixed seat (19), and the tail end of the drainage bolt (20) is connected with a pulling cap (25).

5. A filter according to claim 1, wherein: the upper cover (8) is also provided with a filter (26).

6. A filter according to claim 1, wherein: the filter assembly comprises a cyclone blade (27), a filter element (28), a water retaining block (29) and a fixing rod (30), the water retaining block (29) is arranged at the lower end of the fixing rod (30), the upper end of the fixing rod (30) is fixedly connected with the filter body, the filter element (28) is sleeved on the fixing rod (30) through the water retaining block (29), and the cyclone blade (27) is sleeved outside the filter element (28).

7. A filter according to claim 1, wherein: an air inlet (31) and an air outlet (32) are arranged on the filter body (1), and the air inlet (31) and the air outlet (32) are respectively communicated with the water cup (2).