CN111841191B

CN111841191B - Compressed air filter

Info

Publication number: CN111841191B
Application number: CN202010601892.6A
Authority: CN
Inventors: 张寿根; 肖翰; 萧亚兵; 俞峰; 叶一舟
Original assignee: Zhejiang Gute Pneumatic Machinery Co ltd
Current assignee: Zhejiang Gute Pneumatic Machinery Co ltd
Priority date: 2020-06-29
Filing date: 2020-06-29
Publication date: 2021-09-28
Anticipated expiration: 2040-06-29
Also published as: CN111841191A

Abstract

The invention discloses a compressed air filter, which comprises a shell, a filter element connected with the inside of the shell and a first valve connected with the bottom of the shell, wherein the compressed air filter can be controlled to be communicated with the inside of the compressed air filter through a detection connecting device, when the device detects that the water level inside the filter reaches a certain position, water containing dregs is discharged from the filter, the device can scrape off impurities attached to the inner wall of the filter and discharge the impurities out of the filter, the connecting position is closed after the water is discharged, when the water accumulated inside the device reaches a certain height, the water stored in the water storage position is depressurized, then the water stored in the water storage position is poured out, the phenomenon that the compressed air filter is required to stop working when the water inside the compressed air filter is discharged is avoided, and the working efficiency of the compressed air filter is reduced, and meanwhile, the use effect of the clean degree inside the compressed air filter can be improved.

Description

Compressed air filter

Technical Field

The invention relates to the technical field of compressed air, in particular to a compressed air filter.

Background

When the compressed air filter is used, compressed air carrying harmful substances such as dust, oil, rust, moisture and the like can enter a first-stage filter device of the compressed air filter, a coalescence effect is generated when the compressed air passes through a first-stage cylindrical mesh filter element, larger particles are adsorbed on filter materials, the moisture can be condensed into larger water drops, when the compressed air enters a separation chamber, the speed of the compressed air is reduced, the particles are gathered again, water mist is condensed on a honeycomb-shaped water collector again, water carrying impurity particles finally flows to a drainage device along the bottom, and the water is discharged through a drainage valve arranged at the bottom.

The compressed air filter on the market stores water at the bottom when in use, when the water at the bottom is stored to a certain amount, the compressed air filter stops working, the pressure inside the compressed air filter is reduced by opening the exhaust hole on the compressed air filter, when the internal pressure is reduced to be the same as the external pressure, the drain valve at the bottom is opened to drain the water from the bottom of the compressed air filter, the water is drained by the drainage mode that the filter in work stops working to drain the water, the working efficiency of the compressed air filter is reduced, the traditional drainage mode is only that the drain valve flows out by the self gravity of filtered water, however, when a plurality of filtered water dregs particles are stored inside the filter, the dregs particles in the water are likely to be adhered to the inner wall of the filter, and a great amount of impurity particles are likely to be adhered inside the bottom of the filter in the long-term use process, and the position of water stored at the bottom of the filter is communicated with the movement track of air filtered in the filter, and a large amount of foreign particles are likely to pollute the filtered air. To this end, we propose a compressed air filter.

Disclosure of Invention

The present invention is directed to a compressed air filter to solve the above problems of the related art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a compressed air filter, includes the shell and with shell internal connection's filter core and connect the first valve in the shell bottom, the shell outside is fixed with the screw thread, and the shell has the intercommunication shell through the threaded connection who is equipped with, intercommunication shell bottom is fixed with the second valve, be fixed with on the shell can control and the inside automatic detection connecting device that communicates of intercommunication shell.

Preferably, detect connecting device include with the inside pressure boost mouth, the decompression mouth and the second pressure detection dish that communicate of intercommunication shell, the pressure boost mouth is connected with the pump, be equipped with the screw thread on the decompression mouth, and the decompression mouth has the cover through the screw thread threaded connection who is equipped with, intercommunication shell is inside to be fixed with second valve electric connection second water level monitor, shell outside intercommunication has the first pressure detection dish with the inside intercommunication of shell, and the shell inner wall is fixed with the first water level monitor with first valve electric connection, the first water level monitor outside is equipped with the clearance piece that can clear up the shell inside, realizes discharging the inside water of shell.

Preferably, the cleaning element comprises an annular plate slidably connected with the inner wall of the shell, the annular plate is positioned outside the first water level monitor, two fixing grooves are arranged inside the shell, a positioning rod is fixed inside one of the fixing grooves, a rotating shaft is fixed inside the other fixing groove, a screw rod is rotatably connected inside the fixing groove through the rotating shaft, sliding blocks are fixed outside the screw rod and the positioning rod and fixedly connected with the outer side of the annular plate, the outer side of the sliding block is slidably connected with the inner wall of the fixing groove, a positioning block is fixed on one side of the sliding block away from the annular plate, a positioning groove is slidably connected outside the positioning block and positioned on the inner wall of the fixing groove, a driving motor is fixed on the top of the screw rod by rotating through the fixing groove and fixedly connected with the inner wall of the shell, and a cleaning assembly capable of cleaning the bottom of the inner wall of the shell is fixed at the bottom of the screw rod, and a drying assembly capable of drying the inner wall of the shell is fixed on the annular plate, so that the inner wall of the shell can be cleaned.

Preferably, the drying assembly comprises an annular pipe fixedly connected with the annular plate, the top of the annular pipe is communicated with a telescopic hose, the top of the telescopic hose penetrates through the inner wall of the shell and is connected with a fan, the bottom of the annular pipe is communicated with a plurality of L-shaped pipes, one end of each L-shaped pipe is communicated with an air spraying head, and drying of the inner wall of the shell is achieved.

Preferably, the clearance subassembly includes the driving gear with lead screw bottom fixed connection, the meshing of the driving gear outside is connected with the gear train, and the meshing of gear train one end is connected with driven gear, the inside fixed cup joint of driven gear has the dwang, and the dwang both ends all are fixed with the pivot, the dwang both ends are all rotated through the pivot that is equipped with and are connected with the support shell, and support shell one end and shell inner wall fixed connection, the dwang bottom is passed the support shell bottom and is fixed with screw thread and spacer, and there is the swivel nut bottom through the screw thread threaded connection who is equipped with, swivel nut top and bottom respectively with support shell bottom and spacer top sliding connection, and the swivel nut outside is fixed with the rotation piece that can clear up shell inner wall bottom, realizes the clearance to shell inner wall bottom.

Preferably, the rotating part comprises a fixed shell fixedly connected with the outer side of the rotating ring, a compression spring is fixed inside the fixed shell, a moving plate is fixed at one end of the compression spring, a limiting block is fixed at one end of the moving plate close to the compression spring, a limiting groove is connected to the outer side of the limiting block in a sliding manner, the limiting groove is located on the inner wall of the fixed shell, a scraper is fixed to the moving plate through one end of the moving plate, the outer side of the scraper is connected with the inner wall of the shell in a sliding manner, a moving block is fixed at the top of the scraper, an annular groove is connected to the outer side of the moving block in a sliding manner, and the annular groove is located on the inner wall of the shell to clean the bottom of the inner wall of the shell.

Preferably, the moving block and the annular groove are both in a cross shape, so that the moving of the sliding block is more stable.

Preferably, an annular baffle is fixed on one side of the annular pipe, which is far away from the annular plate, so that the gas sprayed by the gas nozzle is prevented from flowing upwards.

Preferably, a rotating plate is fixed on the cover, so that the cover plate can be conveniently unscrewed.

Compared with the prior art, the invention has the beneficial effects that:

when the device is used, the communication between the device and the interior of the compressed air filter can be controlled through the arranged detection connecting device, when the device detects that the water level in the filter reaches a certain position, the water storage part in the detection connecting device is pressurized, when the pressure of the part is the same as the pressure in the filter, the pressurization is stopped, then the interior of the filter is communicated with the water storage part on the device, the water containing dregs is discharged from the filter, the device can scrape off impurities attached to the inner wall of the filter and discharge the impurities out of the filter, after the water is discharged, the connecting part is closed, when the water accumulated in the device reaches a certain height, the pressure of the water storage part is reduced, then the water in the water storage part is poured out, and the compressed air filter is prevented from stopping working when the water in the compressed air filter is discharged, the work efficiency of the compressed air filter is reduced, and meanwhile, the use effect of the clean degree in the compressed air filter can be improved.

Drawings

FIG. 1 is a schematic sectional front view of the overall structure of the present invention;

FIG. 2 is a schematic top view in cross-section of the present invention;

FIG. 3 is a top view, partially in section, of the structure of the present invention;

FIG. 4 is a schematic partial cross-sectional front view of the inventive structure;

FIG. 5 is a schematic view of the structure of FIG. 1;

FIG. 6 is a schematic view of a portion B of FIG. 2;

fig. 7 is a schematic view of a portion C of fig. 3.

In the figure: 1-a housing; 2-a first valve; 3-a communicating shell; 4-a second valve; 5-detecting the connecting device; 6-a pressurizing port; 7-a pressure reduction port; 8-a second pressure detection plate; 9-covering; 10-a second water level monitor; 11-a first pressure sensing plate; 12-a first water level monitor; 13-cleaning member; 14-an annular plate; 15-fixing grooves; 16-a positioning rod; 17-a screw rod; 18-a slider; 19-positioning blocks; 20-positioning grooves; 21-a drive motor; 22-a cleaning assembly; 23-drying the components; 24-a ring-shaped tube; 25-a flexible hose; 26-an L-shaped tube; 27-a gas jet head; 28-a drive gear; 29-gear train; 30-a driven gear; 31-rotating rods; 32-a support shell; 33-a spacer; 34-a rotating ring; 35-a rotating member; 36-a stationary shell; 37-compression spring; 38-moving the plate; 39-a limiting block; 40-a limiting groove; 41-a scraper; 42-a moving block; 43-an annular groove; 44-an annular baffle; 45-rotating the plate.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-7, the present invention provides a technical solution: a compressed air filter comprises a shell 1, a filter element connected with the inside of the shell 1 and a first valve 2 connected to the bottom of the shell 1, wherein threads are fixed on the outer side of the shell 1, the shell 1 is connected with a communicating shell 3 through the threads, a second valve 4 is fixed at the bottom of the communicating shell 3, and a detection connecting device 5 capable of controlling automatic communication with the inside of the communicating shell 3 is fixed on the shell 1;

when the device is used, firstly, the pressure inside the shell 1 is observed through the detection connecting device 5, then the detection connecting device 5 is opened to enable the detection connecting device 5 to control the pressure inside the communicating shell 3 to be the same as the pressure inside the shell 1, when the detection connecting device 5 detects that the water accumulated inside the shell 1 reaches a certain water level, the first valve 2 is opened to enable the water inside the shell 1 to flow into the communicating shell 3, the detection connecting device 5 can clean dregs on the inner wall of the shell 1 while the water inside the shell 1 flows into the communicating shell 3, when the water inside the shell 1 completely flows into the communicating shell 3, the first valve 2 is closed to enable the shell 1 to be isolated from the communicating shell 3, the water inside the shell 1 can be stored inside the communicating shell 3, when the detection connecting device 5 detects that the water level inside the communicating shell 3 reaches a certain water level, the opening of the second valve 4 enables the water inside the communication case 3 to be discharged outside the communication case 3.

The detection connecting device 5 comprises a pressurizing port 6, a pressure reducing port 7 and a second pressure detection disc 8 which are communicated with the inside of the communicating shell 3, the pressurizing port 6 is connected with an inflator pump, the scheme of the inflator pump is not shown, the pressure reducing port 7 is provided with threads, the pressure reducing port 7 is connected with a cover 9 through the threads of the threads, a second water level monitor 10 which is electrically connected with the second valve 4 is fixed inside the communicating shell 3, the outer side of the shell 1 is communicated with a first pressure detection disc 11 which is communicated with the inside of the shell 1, the inner wall of the shell 1 is fixed with a first water level monitor 12 which is electrically connected with the first valve 2, and a cleaning piece 13 which can clean the inside of the shell 1 is arranged outside the first water level monitor 12;

connecting the communicating shell 3 with the shell 1, then obtaining the pressure intensity of the shell 1 during internal work through the first pressure detection disc 11, then opening the inflator pump to inflate the inflator pump from the pressurization port 6 to the communicating shell 3 so as to increase the pressure intensity of the communicating shell 3, stopping pressurizing the communicating shell 3 when the second pressure detector detects that the pressure intensity of the communicating shell 3 is the same, keeping the pressure intensity of the communicating shell 3 consistent with the pressure intensity of the shell 1, when the first water level detector detects that the water level of the shell 1 reaches a certain height, opening the first valve 2 to communicate the shell 1 with the communicating shell 3 so as to discharge the water in the shell 1 to the communicating shell 3 for storage, when discharging the water, the cleaning piece 13 can clean the inner wall at the bottom of the shell 1, closing the first valve 2 when the water in the shell 1 is discharged, so as to ensure that the shell 1 is not communicated with the communicating shell 3, repeated operation alright with realize making the intercommunication shell 3 carry out a lot of to the inside water of shell 1 and store, when second water level detector detected that the inside water level of intercommunication shell 3 reaches certain height, external force will be opened the apron, realizes the decompression to the inside of intercommunication shell 3, then opens second valve 4 again and makes the inside water discharge of intercommunication shell 3 inside communicate the shell 3.

The cleaning piece 13 comprises a ring-shaped plate 14 connected with the inner wall of the shell 1 in a sliding way, the ring-shaped plate 14 is positioned at the outer side of the first water level monitor 12, two fixing grooves 15 are arranged in the shell 1, a positioning rod 16 is fixed in one fixing groove 15, a rotating shaft is fixed in the other fixing groove 15, a screw rod 17 is connected in the fixing groove 15 in a rotating way through the rotating shaft, sliding blocks 18 are fixed at the outer sides of the screw rod 17 and the positioning rod 16, the sliding blocks 18 are fixedly connected with the outer side of the ring-shaped plate 14, the outer side of the sliding blocks 18 is connected with the inner wall of the fixing grooves 15 in a sliding way, a positioning block 19 is fixed at one side of the sliding blocks 18 far away from the ring-shaped plate 14, a positioning groove 20 is connected at the outer side of the positioning block 19 in a sliding way, the positioning groove 20 is positioned on the inner wall of the fixing groove 15, a driving motor 21 is fixed at the top of the screw rod 17 through the fixing groove 15 in a rotating way, the driving motor 21 is fixedly connected with the inner wall of the shell 1, a cleaning component 22 capable of cleaning the bottom of the inner wall of the shell 1 is fixed at the bottom of the screw rod 17, a drying component 23 which can dry the inner wall of the shell 1 is fixed on the annular plate 14;

when the shell 1 drains water to the inside of the communicating shell 3, the driving motor 21 is driven, the driving force of the driving motor 21 drives the screw rod 17 to rotate, the rotating force of the screw rod 17 drives the sliding block 18 to slide in the fixing groove 15, meanwhile, the rotating force of the screw rod 17 drives the cleaning assembly 22 to move, the sliding block 18 drives the positioning block 19 and the annular plate 14 to move in the positioning groove 20 and the inner wall of the shell 1 respectively, so that the sliding block 18 moves more stably, when the moving force of the annular plate 14 drives the other sliding block 18 to move on the positioning rod 16, and the moving force of the annular plate 14 drives the drying assembly 23 to move in the shell 1.

The drying assembly 23 comprises an annular pipe 24 fixedly connected with the annular plate 14, the top of the annular pipe 24 is communicated with a telescopic hose 25, the top of the telescopic hose 25 penetrates through the inner wall of the shell 1 and is connected with a fan, the fan is not shown in the scheme, the bottom of the annular pipe 24 is communicated with a plurality of L-shaped pipes 26, and one ends of the L-shaped pipes 26 are communicated with a gas nozzle 27;

when the annular plate 14 moves in the shell 1, one end of the telescopic hose 25 is connected with the fan, the fan is opened, the telescopic hose 25 can transmit wind to the annular pipe 24, meanwhile, the annular plate 14 drives the annular pipe 24 to move in the shell 1, and the wind in the annular pipe 24 can be transmitted to the air nozzle 27 through the L-shaped pipe 26, so that the air nozzle 27 can dry the inner wall of the shell 1.

The cleaning assembly 22 comprises a driving gear 28 fixedly connected with the bottom of the screw rod 17, a gear chain 29 is connected to the outer side of the driving gear 28 in a meshed manner, one end of the gear chain 29 is connected with a driven gear 30 in a meshed manner, a rotating rod 31 is fixedly sleeved inside the driven gear 30, rotating shafts are fixed at two ends of the rotating rod 31 respectively, two ends of the rotating rod 31 are rotatably connected with a supporting shell 32 through the arranged rotating shafts, one end of the supporting shell 32 is fixedly connected with the inner wall of the shell 1, a thread and a positioning sheet 33 are fixed at the bottom of the rotating rod 31 through the bottom of the supporting shell 32, a rotating ring 34 is connected at the bottom of the rotating rod 31 through the arranged thread, the top and the bottom of the rotating ring 34 are respectively connected with the bottom of the supporting shell 32 and the top of the positioning sheet 33 in a sliding manner, and a rotating member 35 capable of cleaning the bottom of the inner wall of the shell 1 is fixed on the outer side of the rotating ring 34;

the rotating force of the screw 17 drives the driving gear 28 to rotate, the rotating force of the driving gear 28 drives the gear chain 29 to rotate, the rotating force of the gear chain 29 drives the driven gear 30 to rotate, the rotating force of the driven gear 30 drives the rotating rod 31 to rotate, the rotating force of the rotating rod 31 drives the rotating ring 34 to rotate, and the rotating force of the rotating ring 34 drives the rotating piece 35 to rotate.

The rotating part 35 comprises a fixed shell 36 fixedly connected with the outer side of the rotating ring 34, a compression spring 37 is fixed inside the fixed shell 36, a moving plate 38 is fixed at one end of the compression spring 37, a limiting block 39 is fixed at one end, close to the compression spring 37, of the moving plate 38, a limiting groove 40 is connected to the outer side of the limiting block 39 in a sliding mode, the limiting groove 40 is located on the inner wall of the fixed shell 36, a scraper 41 is fixed at one end of the moving plate 38, penetrates through the fixed shell 36, the outer side of the scraper 41 is connected with the inner wall of the shell 1 in a sliding mode, a moving block 42 is fixed at the top of the scraper 41, an annular groove 43 is connected to the outer side of the moving block 42 in a sliding mode, and the annular groove 43 is located on the inner wall of the shell 1;

the rotating force of the rotating ring 34 drives the fixed shell 36 to rotate, the rotating force of the fixed shell 36 drives the compression spring 37, the moving plate 38 and the limiting block 39 to rotate, the rotating force of the moving plate 38 drives the scraper 41 to rotate on the inner wall of the shell 1, meanwhile, the rotating force of the scraper 41 drives the moving block 42 to move in the annular groove 43, the moving block 42 also provides a pulling force for the scraper 41 in the moving process, the scraper 41 transmits the pulling force to the moving plate 38, the moving plate 38 slides in the fixed shell 36, the compression spring 37 is stretched in the sliding process of the moving plate 38, meanwhile, the moving plate 38 drives the limiting block 39 to move in the limiting groove 40, and the moving distance of the moving plate 38 is limited, so that the moving of the moving plate 38 is more stable.

The moving block 42 and the annular groove 43 are both cross-shaped.

An annular baffle 44 is secured to the side of the annular tube 24 remote from the annular plate 14.

A rotating plate 45 is fixed to the cover 9.

In the scheme, the type Y80M1-2 is preferably selected as the driving motor 21, the circuit operates as the conventional circuit, and the circuits and the control related to the invention are the prior art and are not described in detail herein.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A compressed air filter, including shell (1) and with shell (1) internal connection's filter core, and connect first valve (2) in shell (1) bottom, its characterized in that: the outer side of the shell (1) is fixed with threads, the shell (1) is connected with a communicating shell (3) through the arranged threads, the bottom of the communicating shell (3) is fixed with a second valve (4), the shell (1) is fixed with a detection connecting device (5) capable of controlling and automatically communicating with the inside of the communicating shell (3), the detection connecting device (5) comprises a pressure increasing port (6) communicated with the inside of the communicating shell (3), a pressure reducing port (7) and a second pressure detection disc (8), the pressure increasing port (6) is connected with an inflator pump, the pressure reducing port (7) is provided with threads, the pressure reducing port (7) is connected with a cover (9) through the arranged threads, the inside of the communicating shell (3) is fixed with a second water level monitor (10) electrically connected with the second valve (4), the outer side of the shell (1) is communicated with a first pressure detection disc (11) communicated with the inside of the shell (1), and the inner wall of the shell (1) is fixed with a first water level monitor (12) electrically connected with the first valve (2), and the outer side of the first water level monitor (12) is provided with a cleaning piece (13) capable of cleaning the inner part of the shell (1).

2. A compressed air filter according to claim 1, wherein: the cleaning part (13) comprises an annular plate (14) which is in sliding connection with the inner wall of the shell (1), the annular plate (14) is located on the outer side of the first water level monitor (12), two fixing grooves (15) are formed in the shell (1), a positioning rod (16) is fixed in one fixing groove (15), a rotating shaft is fixed in the other fixing groove (15), a lead screw (17) is rotatably connected in the fixing groove (15) through the rotating shaft, sliding blocks (18) are fixed on the outer sides of the lead screw (17) and the positioning rod (16), the sliding blocks (18) are fixedly connected with the outer side of the annular plate (14), the outer side of each sliding block (18) is in sliding connection with the inner wall of the corresponding fixing groove (15), a positioning block (19) is fixed on one side, away from the annular plate (14), of each sliding block (18), and a positioning groove (20) is slidably connected with the outer side of each positioning block (19), constant head tank (20) are located fixed slot (15) inner wall, lead screw (17) top is rotated and is passed fixed slot (15) and be fixed with driving motor (21), and driving motor (21) and shell (1) inner wall fixed connection, lead screw (17) bottom is fixed with clearance subassembly (22) that can clear up shell (1) inner wall bottom, be fixed with on annular plate (14) and carry out stoving subassembly (23) of drying to shell (1) inner wall.

3. A compressed air filter according to claim 2, wherein: drying assembly (23) include with annular plate (14) fixed connection's annular pipe (24), annular pipe (24) top intercommunication has bellows (25), and bellows (25) top is passed shell (1) inner wall and is connected with the fan, annular pipe (24) bottom intercommunication has a plurality of L venturi tube (26), and L venturi tube (26) one end intercommunication has jet-propelled head (27).

4. A compressed air filter according to claim 2, wherein: the cleaning assembly (22) comprises a driving gear (28) fixedly connected with the bottom of a screw rod (17), the outside of the driving gear (28) is meshed with a gear chain (29), one end of the gear chain (29) is meshed with a driven gear (30), the inside of the driven gear (30) is fixedly sleeved with a rotating rod (31), the two ends of the rotating rod (31) are fixed with rotating shafts, the two ends of the rotating rod (31) are connected with a supporting shell (32) in a rotating mode through the rotating shafts arranged, one end of the supporting shell (32) is fixedly connected with the inner wall of a shell (1), the bottom of the rotating rod (31) penetrates through the bottom of the supporting shell (32) and is fixed with threads and a positioning sheet (33), the bottom of the rotating rod (31) is connected with a rotating ring (34) through the threads arranged, and the top and the bottom of the rotating ring (34) are respectively connected with the bottom of the supporting shell (32) and the top of the positioning sheet (33) in a sliding mode, and a rotating piece (35) which can clean the bottom of the inner wall of the shell (1) is fixed on the outer side of the rotating ring (34).

5. A compressed air filter according to claim 4, wherein: the rotating piece (35) comprises a fixed shell (36) fixedly connected with the outer side of the rotating ring (34), a compression spring (37) is fixed inside the fixed shell (36), a moving plate (38) is fixed at one end of the compression spring (37), a limiting block (39) is fixed at one end, close to the compression spring (37), of the moving plate (38), a limiting groove (40) is connected to the outer side of the limiting block (39) in a sliding mode, the limiting groove (40) is located on the inner wall of the fixed shell (36), a scraping plate (41) is fixed at one end of the moving plate (38) after penetrating out of the fixed shell (36), the outer side of the scraping plate (41) is connected with the inner wall of the shell (1) in a sliding mode, a moving block (42) is fixed to the top of the scraping plate (41), an annular groove (43) is connected to the outer side of the moving block (42) in a sliding mode, and the annular groove (43) is located on the inner wall of the shell (1).

6. A compressed air filter according to claim 5, wherein: the moving block (42) and the annular groove (43) are both in a cross shape.

7. A compressed air filter according to claim 3, wherein: an annular baffle plate (44) is fixed on one side of the annular pipe (24) far away from the annular plate (14).

8. A compressed air filter according to claim 1, wherein: a rotating plate (45) is fixed on the cover (9).