CN115487623B

CN115487623B - Air inlet filtering device for centrifugal machine

Info

Publication number: CN115487623B
Application number: CN202211330468.8A
Authority: CN
Inventors: 程红岩; 袁旻舒; 李屈伟; 赵建军
Original assignee: Xi'an Xinyue Ecological Technology Co ltd
Current assignee: Xi'an Xinyue Ecological Technology Co ltd
Priority date: 2022-10-28
Filing date: 2022-10-28
Publication date: 2023-03-10
Anticipated expiration: 2042-10-28
Also published as: CN115487623A

Abstract

The invention relates to a filter device for an air inlet of a centrifugal machine, which relates to the technical field of filter devices and solves the problem of inconvenient operation when the filter device is cleaned.

Description

Air inlet filtering device for centrifugal machine

Technical Field

The invention relates to the technical field of filtering devices, in particular to a filtering device for an air inlet of a centrifugal machine.

Background

Centrifuges are machines that use centrifugal force to separate components of a mixture of liquid and solid particles or liquid and liquid. The centrifuge is mainly used for separating solid particles in suspension from liquid or separating two immiscible liquids with different densities in emulsion (for example, cream is separated from milk), and can also be used for removing the liquid in wet solids, an air inlet is arranged at one end of the centrifuge, fresh air can be sent into the centrifuge by the air inlet, then the air inlet is inconvenient for daily cleaning due to the fact that the air inlet lacks of a reasonable filtering structure, so that the problem is solved, chinese patent No. CN202120946485.9 discloses a structure for additionally installing a pre-filtering device at the air inlet of the centrifuge, the structure comprises a centrifuge body and a cloth barrel, the side wall of the centrifuge body is connected with the air inlet barrel in a penetrating mode, filter cloth is fixedly connected at one end of the cloth barrel in a penetrating mode, grooves are symmetrically formed in the outer side wall of the air inlet barrel, a first spring is fixedly welded at one end, far away from an opening, the other end of the groove is fixedly welded with a fixture block, clamping grooves are formed in positions, corresponding to the two grooves, the groove wall of a push rod is fixedly connected with a press block in a penetrating mode.

In summary, in the prior art, the filter cloth is knocked by the knocking ball, so that the filter device can be cleaned regularly, but the centrifuge is not necessarily installed at a conventional height, so that an operator needs to climb up to clean the filter device, which causes inconvenience in work and poor cleaning effect, and increases labor cost when the whole filter device is detached from the air inlet.

Disclosure of Invention

In view of the above problems, the present invention provides a filter device for an air inlet of a centrifuge, which facilitates cleaning of the filter device mounted on the air inlet.

In order to achieve the purpose, the invention provides the following technical scheme:

the utility model provides a be used for centrifuge air inlet filter equipment, is in including minute body pipe and setting the filter mantle of the intraductal netted shape of components of a whole that can function independently, the mid-mounting of minute body pipe has the fixing base, the inner of fixing base communicates with each other with minute body pipe, the inside packing of fixing base has the guide cylinder, sliding fit has the pressure cover in the guide cylinder, the top of pressing the cover is equipped with the shrouding, the top of fixing base is equipped with the annular support board, the pressure cover can be along guide cylinder lift action, go up the shrouding with be connected with between the annular support board and can make the spring that can rise the reset after pressing the cover decline action again, the pressure cover is equipped with the sealed chamber that corresponds in last shrouding below along its direction of height, sealed intracavity packing has the neck bush, the one end of neck bush upwards extends and installs outer bushing, and the other end of neck bush is equipped with downwardly extending and runs through the intraductal flexbile duct of components of a whole that can function independently, the bottom of flexbile duct is equipped with slightly towards the perk portion of the conflict in the flexbile duct again, the inner of filter mantle is connected with the flexible neck bush that extends after the lumen bottom of minute body pipe extends, and the flexurally, the flexbile duct is located the flexurally, the flexurally move in the flexible neck bush in the flexible direction of the flexible neck bush in the flexible movement, the flexible neck bush in order to move.

As further preferred: the inner end of the fixing seat is flush with the inner wall of the tube cavity of the branch tube, and when the pressing sleeve is released by the spring to rise to a reset state, the bottom end of the pressing sleeve is far away from the inner wall of the tube cavity of the branch tube.

As further preferred: the inner wall laminating of filter mantle is on the lumen inner wall of branch siphunculus, the one end of branch siphunculus is equipped with first flange connection pad, the other end of branch siphunculus is equipped with second flange connection pad, the annular has been seted up on the first flange connection pad, the one end of filter mantle is equipped with and coincide in the annular ring-shaped pressing plate after it installs on dividing the siphunculus, and the thickness of annular pressing plate is equal to the degree of depth of annular ring, a plurality of fixed orifices has all been seted up on the first flange connection pad and the second flange connection pad of branch siphunculus.

As further preferred: the tilting part of the flexible pipe is provided with a one-way valve, and the tail end of the tilting part is provided with a spray head facing the filter cover.

As further preferred: the wane is the metal sheet, and it is formed with the fifteen degrees contained angles that are used for making it upwards slope with the lumen inner wall of minute siphuncle.

As further preferred: the filter mantle comprises two part structures, and one part structure is for laminating the filter end on minute body pipe lumen inner wall, and another part is for being located the inner of filter end and towards the fan-shaped groove end in second flange connection dish, the filter end is formed with the opening direction towards the filter chamber in annular pressure plate, fan-shaped groove end with be formed with the arcwall face that corresponds in the filter chamber between the filter chamber, the involving range of netted filtration pore includes in the arcwall face on the filter mantle, the top inclined plane of wane and the fan-shaped groove end of filter mantle mutually respond from top to bottom.

As further preferred: the top surface of going up the shrouding is connected with the pull rod, the pull rod is from the peripheral downwardly perpendicular extension of component pipe again after the top surface downward bending of going up the shrouding, and installs rings in the bottom of pull rod.

As further preferred: the pipe dividing device comprises a pipe dividing pipe, a tilting part, a flexible pipe and a flexible pipe, wherein the pipe dividing pipe is made of transparent materials, the flexible pipe is filled with the flexible pipe, the flexible pipe is filled in the range of a pipe cavity of the flexible pipe and the tilting part, S-shaped multi-section bent parts corresponding to the pipe cavity of the tilting part are arranged on the flexible pipe, one end of the flexible pipe upwards extends to be communicated with the lining pipe along the pipe cavity of the flexible pipe, and the other end of the flexible pipe is connected to a spray head along the pipe cavity of the tilting part.

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

the filter cover is provided with a split pipe, the filter cover is arranged in the split pipe, a pressing sleeve capable of lifting and descending is arranged at the top of the split pipe in a sliding guide mode through a guide cylinder, a flexible pipe is arranged on the pressing sleeve, the pressing sleeve drives the flexible pipe to swing when lifting and descending in the split pipe, the swinging direction corresponds to the filter cover, the filter cover is structurally designed, a fan-shaped groove is formed in one end, facing the fan-shaped part of the flexible pipe, of the filter cover, an arc-shaped surface is formed on the same side end of an inner cavity of the filter cover when the fan-shaped groove is formed, a pipeline connected with the different end of the pressing sleeve is connected with a water gun only when the filter cover is cleaned, when the water gun sprays water, water enters an inner lining pipe of the pressing sleeve, and is sprayed out through a spray head on the upper tilted end of the flexible pipe, an operator only needs to stand on the ground to pull a lifting ring down to enable the pressing sleeve to lift and descend, when the lifting and the flexible pipe lifts and moves, the inner end of the fan-shaped pipe can extrude the inner end of the bending plate through the bending plate, the inner end of the filter cover and the inner end of the ring is aligned to be cleaned when the filter cover is lifted and the filter cover, the filter cover can be cleaned, and the filter cover can be fully cleaned water flow, and the filter cover can be discharged as an effective water flow when the filter. Therefore, even if the centrifugal machine is installed at a higher position, an operator only needs to connect an external connecting pipe to the workshop water gun and manually pull down the lifting ring to complete the cleaning of the filter cover, and compared with the prior art, the cleaning mode is more flexible.

Drawings

FIG. 1 is a schematic view of the present invention from a principal perspective;

FIG. 2 is a schematic side plan view of the flange from FIG. 1;

FIG. 3 is a schematic view of the cut-away internal structure of the present invention;

FIG. 4 is a schematic view of the present invention taken along the plane of section A in FIG. 2;

FIG. 5 is a schematic view showing the structure of a flexible double tube having a multi-stage bent portion inside, which is cut away from the inner liner tube shown in FIG. 4 and the flexible tube connected to the inner liner tube, according to the present invention.

Description of the main reference numerals:

1. separating the pipes; 2. a filter housing; 3. a fixed seat; 4. a guide cylinder; 5. pressing a sleeve; 6. an upper sealing plate; 7. an annular support plate; 8. a spring; 9. sealing the cavity; 10. a liner tube; 11. an external connection pipe; 12. a flexible tube; 13. a raised portion; 14. a seesaw; 15. bending a plate; 16. a first flange connection disc; 17. a second flange connection disc; 18. a ring groove; 19. a one-way valve; 20. a spray head; 21. a filtration end; 22. a sector slot end; 23. a filter chamber; 24. an arc-shaped surface; 25. a hoisting ring; 26. a flexible second tube; 27. a pull rod; 28. an annular pressure plate; 29. a multi-section bending part.

Detailed Description

The technical solutions of the present invention will be described in detail and fully with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments, but not all embodiments, of the present invention. 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.

In the description of the present invention, it should be noted that the orientations or positional relationships indicated as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., appear based on the orientations or positional relationships shown in the drawings only for the convenience of describing the present invention and simplifying the description, but not for indicating or implying that the referred devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be specifically understood by those skilled in the art.

Referring to fig. 1-5, an air inlet filtering device for a centrifugal machine comprises a branch pipe 1 and a net-shaped filtering cover 2 arranged in the branch pipe 1, and structurally, the filtering device with the filtering cover 2 is mounted on an air inlet of the centrifugal machine in actual use, namely the filtering device can be detached and assembled, and the net-shaped filtering cover 2 is mounted in the branch pipe 1, so that the filtering device can be detached and assembled conveniently and is convenient to maintain. As shown in fig. 3 and 4, two states of the filter housing 2 in the separate tube 1 are known: the filter cover 2 is installed in the split pipe 1, the inner wall surface of the filter cover is attached to the inner wall of a pipe cavity of the split pipe 1, one end of the split pipe 1 is provided with a first flange connection disc 16 used for fixing the air inlet end of the filter cover 2 at the air inlet end of the split pipe 1, the other end of the split pipe 1 is provided with a second flange connection disc 17 used for enabling the filter cover 2 to be installed on the air inlet of the centrifugal machine along with the split pipe 1, a ring groove 18 is formed in the first flange connection disc 16, one end of the filter cover 2 is provided with an annular pressing plate 28 which is matched with the ring groove 18 after being installed on the split pipe 1, the thickness of the annular pressing plate 28 is equal to the depth of the ring groove 18, and the first flange connection disc 16 and the second flange connection disc 17 of the split pipe 1 are respectively provided with a plurality of fixing holes used for enabling the connection relation to be in butt joint fixing through bolts.

A fixed seat 3 is arranged in the middle of the branch pipe 1, the inner end of the fixed seat 3 is communicated with the branch pipe 1, a guide cylinder 4 is filled in the fixed seat 3, a pressing sleeve 5 is arranged in the guide cylinder 4 in a sliding fit manner, an upper sealing plate 6 is arranged at the top end of the pressing sleeve 5, an annular supporting plate 7 is arranged at the top end of the fixed seat 3, the pressing sleeve 5 can move up and down along the guide cylinder 4, a spring 8 which can enable the pressing sleeve 5 to move down and then to move up and back is connected between the upper sealing plate 6 and the annular supporting plate 7, namely the pressing sleeve 5 can automatically move up along the guide cylinder 4 under the action of the elastic force released by the spring 8 after moving down along the guide cylinder 4, the upper sealing plate 6 is connected with the annular supporting plate 7 by the spring 8, the pressing sleeve 5 can be ensured not to be separated from the guide cylinder 4 after moving up, a sealing cavity 9 corresponding to the lower part of the upper sealing plate 6 is arranged along the height direction of the pressing sleeve 5, an inner lining pipe 10 is filled in the sealing cavity 9, one end of the inner lining pipe 10 extends upwards and is provided with an external connecting pipe 11, the external connecting pipe 11 can be butted with a water gun in a workshop through a quick coupling, and can also be butted with an air compressor spray gun in the workshop through a quick coupling, the other end of the inner lining pipe 10 is provided with a flexible pipe 12 which extends downwards and penetrates through the branch pipe 1, high-pressure medium (water or gas) released after the butt joint of an air gun or the water gun can enter the inner lining pipe 10 and then is introduced into the branch pipe 1 through the flexible pipe 12 at the bottom end of the inner lining pipe 10, as the bottom end of the flexible pipe 12 is provided with a tilting part 13 which is slightly bent towards the direction of the filter mantle 2, the inner end of the filter mantle 2 is connected with a tilting plate 14 which extends along the bottom of the pipe cavity of the branch pipe 1 and then inclines upwards towards the tilting part 13 of the flexible pipe 12, and the tail end of the tilting plate 14 is provided with a bending plate 15 which corresponds to the lower part of the flexible pipe 12, the bending direction of the bent plate 15 faces the inner end of the filter housing 2, when the pressing sleeve 5 drives the inner lining pipe 10 to move downwards, the flexible pipe 12 at the bottom end of the inner lining pipe 10 can abut against the bent plate 15 at the tail end of the bent plate 14, so that the tilting part 13 of the flexible pipe 12 completes the tilting action, that is to say, in sum, an operator only needs to control the pressing sleeve 5 to frequently perform the lifting action along the guide cylinder 4, so that the inner lining pipe 10 in the pressing sleeve 5 drives the flexible pipe 12 to perform the frequent lifting action, the tilting part 13 at the bottom end of the flexible pipe 12 is frequently contacted with the bent plate 15 downwards to be changed into upwards separated, because the bent plate 15 is the bent plate, and the tilting part 13 is the bending section inclined towards the inner end direction of the filter housing 2, the tilting part 13 is extruded on the bent plate 15 to be bent upwards when descending, the tilting part 13 releases the elastic force and bends downwards when ascending, so as to drive the spray head 20 on the inner end of the filter housing 2 to stop the upward and spray impurities from the filter housing 2, and the filter housing 2 can be sprayed out completely.

In order to facilitate the above operation, a pull rod 27 is connected to the top surface of the upper sealing plate 6, the pull rod 27 is bent downward from the top surface of the upper sealing plate 6 and then extends downward and vertically from the periphery of the body tube 1, and a hanging ring 25 is installed at the bottom end of the pull rod 27. The setting of pull rod 27 makes the pressure cover 5 lift action can remote operation, promptly, when this filter equipment installs and uses on the air inlet of centrifuge, even the position of installing after the centrifuge construction is in higher, then can through directly holding rings 25 and exert the mode of drop-down action to pull rod 27, make pressure cover 5 accomplish the lift action, finally through above-mentioned principle to make shower nozzle 20 aim at the inner of filter mantle 2 and accomplish the oscillating and spray the clearance action, also can hang the stay cord on rings 25, in order to improve its actual operating distance.

As shown in fig. 4, the inner end of the fixing seat 3 is flush with the inner wall of the tube cavity of the separate tube 1, when the pressing sleeve 5 is lifted to the reset state by the elastic force released by the spring 8, the bottom end of the pressing sleeve 5 is far away from the inner wall of the tube cavity of the separate tube 1, that is, when the filter cover 2 is not required to be cleaned, the pressing sleeve 5 can be moved back to the initial position upwards when the spring 8 releases the elastic force, only the flexible tube 12 with a small section of size is retained in the separate tube 1, so as to avoid the obstructive influence of the pressing sleeve 5 on the air supply of the separate tube 1 to the centrifuge, and meanwhile, when the pressing sleeve 5 is moved downwards, the flexible tube 12 and the tilted part 13 thereof can be pushed to the bent plate 15, so that the spray head 20 faces the inner end of the filter cover 2 to complete the swing type spraying action of the medium, and the lifting action function of the pressing sleeve 5 is reasonably designed.

As shown in fig. 3 and 5: the tilting part 13 of the flexible pipe 12 is provided with a check valve 19, the tail end of the tilting part 13 is provided with a spray head 20 facing the filter housing 2, when the filter housing 2 is cleaned daily and the centrifuge is in a stop state, a cleaning medium (gas or water) provided by the flexible pipe 12 to the spray head 20 can automatically open the check valve 19 under the action of pressure (water gun pressure and air compressor pressure), the medium is sprayed out from the spray head 20, when the centrifuge normally works, the filter housing 2 cannot be cleaned synchronously, namely, the cleaning medium is not provided to the flexible pipe 12 and the spray head 20 through the external connection pipe 11 any more, at the moment, the check valve 19 is in an automatic closing state, so that when the centrifuge works and absorbs gas from the branch pipe 1, part of the gas can enter the spray head 20 and then enter the internal lining pipe 10 through the spray head 20, and finally is sprayed out through the external connection pipe 11, and gas leakage is avoided.

As shown in fig. 2 to 4: the wane 14 is a metal plate, a fifteen-degree included angle for enabling the wane to tilt upwards is formed between the wane 14 and the inner wall of the tube cavity of the partial tube 1, namely, one end of the wane 14, which is provided with the bent plate 15, slightly tilts upwards and extends to the position, which is far away from the inner end of the filter cover 2, of the bent plate 15, which corresponds to the position below the flexible tube 12, the wane 14 is used for installing the bent plate 15, so that the bent plate 15 has a certain supporting force, and the arrangement of the inclined structure of the wane 14 can also form a bottom receiving plate in the direction of the inner end of the filter cover 2, when the medium sprayed by the spray head 20 is water, besides that most of water is directly sprayed to the inner end of the filter cover 2 and passes through meshes of the filter cover 2 to enter the inner cavity of the filter cover to clean blocked dust outwards, a part of the water is directly reflected to the tube cavity of the partial tube 1, and the wane 14 is arranged, the water can be received by the wane 14, and the water can be slightly tilted towards the annular pressing plate 2 in the direction of the inner end of the filter cover 2, so that a great amount of water flows out of the filter cover 2, and the filter can be reasonably cleaned by the centrifuge, and the waste water can be reasonably cleaned by the centrifuge, and the waste water flow device can be reasonably solved, and the waste water flow device can be reasonably cleaned by the centrifuge, and the waste water flow device can be reasonably cleaned by the centrifuge, and the waste water flow device 1.

As shown in fig. 3 and 4: the filter cover 2 is composed of two parts, one part of the structure is a filter end 21 attached to the inner wall of the tube cavity of the split tube 1, the other part of the structure is a fan-shaped groove end 22 located at the inner end of the filter end 21 and facing the second flange connection disc 17, the filter end 21 is provided with a filter cavity 23 with an opening direction facing the annular pressing plate 28, an arc-shaped surface 24 corresponding to the filter cavity 23 is formed between the fan-shaped groove end 22 and the filter cavity 23, the range of the net-shaped filter holes on the filter cover 2 is included in the arc-shaped surface 24, and the top inclined surface of the wane 14 corresponds to the fan-shaped groove end 22 of the filter cover 2 up and down. The fan-shaped slot end 22 is the inner end structure of the filter cover 2, so that the medium sprayed from the spray head 20 can be collected in the fan-shaped slot end 22 when being cleaned, so that the pressure of the medium sprayed to the part is increased, and the medium passes through the meshes to clean dust and impurities in the filter cavity 23 outwards in a stronger way, and if the medium is water, most of the water flows into the filter cavity 23 along the arc-shaped surface 24 in a fall way when being sprayed, so that the dust and the impurities in the filter cavity 23 are washed outwards. The term "outwardly" as used herein refers to the end of the filter housing 2 to which the annular pressure plate 28 is attached.

The partial pipe 1 is a transparent material pipe, so that the use state of the filter mantle 2 inside the partial pipe can be conveniently seen, and the state after cleaning is convenient, as shown in fig. 5, a flexible two pipe 26 is filled in the flexible pipe 12, the flexible two pipe 26 is filled in the range of the pipe cavity of the flexible pipe 12 and the tilting part 13, and an S-shaped multi-section bending part 29 corresponding to the pipe cavity of the tilting part 13 is arranged on the flexible two pipe 26, one end of the flexible two pipe 26 extends upwards along the pipe cavity of the flexible two pipe 26 to be communicated with the lining pipe 10, and the other end of the flexible two pipe 26 is connected to the spray head 20 along the pipe cavity of the tilting part 13, because the flexible two pipe 26 is filled in the flexible pipe 12, the pipe actually providing the cleaning medium for the spray head 20 is the flexible two pipe 26, when the flexible pipe 12 is in high-frequency extrusion contact with the bending plate 15, no frictional influence is generated on the flexible two pipe 26, so as to avoid the medium from breaking and overflowing, the service life of the pipe is prolonged, because the flexible two pipe 26 is also provided with the S-shaped multi-section bending part 29, the flexible pipe 26 can not generate frictional influence on the flexible pipe 12 when the tilting part 13, so as the tilting part 13, the normal swing of the flexible pipe 13, the flexible pipe, the folding structure can avoid the folding part to generate a large swing motion, and the folding variable quantity of the flexible pipe 12, thereby avoiding the folding structure.

Note that, when the filter housing 2 is subjected to the above cleaning operation, the centrifuge connected through the separate pipe 1 needs to be stopped in operation, thereby avoiding a reaction with the medium ejected from the nozzle 20 during cleaning.

The foregoing descriptions of specific exemplary embodiments of the present invention have been presented for purposes of illustration and description. It is not intended to limit the invention to the precise form disclosed, and obviously many modifications and variations are possible in light of the above teaching. The exemplary embodiments were chosen and described in order to explain certain principles of the invention and its practical application to enable one skilled in the art to make and use various exemplary embodiments of the invention and various alternatives and modifications as are suited to the particular use contemplated. It is intended that the scope of the invention be defined by the claims and their equivalents.

Claims

1. A filter device for air inlet of centrifugal machine, which comprises a split pipe (1) and a filter cover (2) with a net shape arranged in the split pipe (1), and is characterized in that: a fixed seat (3) is arranged in the middle of the branch pipe (1), the inner end of the fixed seat (3) is communicated with the branch pipe (1), a guide cylinder (4) is filled in the fixed seat (3), a pressing sleeve (5) is arranged in the guide cylinder (4) in a sliding fit manner, an upper sealing plate (6) is arranged at the top end of the pressing sleeve (5), an annular supporting plate (7) is arranged at the top end of the fixed seat (3), the pressing sleeve (5) can move up and down along the guide cylinder (4), a spring (8) which can enable the pressing sleeve (5) to move up and down and reset after moving down is connected between the upper sealing plate (6) and the annular supporting plate (7), a sealing cavity (9) corresponding to the lower part of the upper sealing plate (6) is arranged in the pressing sleeve (5) along the height direction of the pressing sleeve, a lining pipe (10) is filled in the sealing cavity (9), one end of the lining pipe (10) extends upwards and is provided with an outer pipe (11), the other end of the lining pipe (10) is provided with a flexible pipe (12) which extends downwards to penetrate through the branch pipe (1), the bottom end of the flexible pipe (12) is provided with a tilting part (13) which slightly bends towards the direction of the filtering cover (2), and is connected with an extending part (13) which extends upwards along the tilting part of the inner end of the flexible pipe (12) which extends towards the filtering cover (2) and is connected with the tilting part (12) which extends upwards, the end of the warped plate (14) is provided with a bent plate (15) corresponding to the lower part of the flexible pipe (12), the width dimension of the bent plate (15) is larger than the pipe diameter dimensions of the flexible pipe (12) and the warped part (13), a groove with the width dimension larger than the pipe diameter dimensions of the flexible pipe (12) and the warped part (13) is also arranged in the bent plate (15), the bending direction of the bent plate (15) faces towards the inner end of the filter cover (2), and when the pressing sleeve (5) drives the inner lining pipe (10) to move downwards, the flexible pipe (12) at the bottom end of the inner lining pipe (10) can be abutted against the bent plate (15) at the end of the warped plate (14) so that the warped part (13) of the flexible pipe (12) completes warping action;

the inner end of the fixed seat (3) is flush with the inner wall of the tube cavity of the separate tube (1), and the bottom end of the pressing sleeve (5) is far away from the inner wall of the tube cavity of the separate tube (1) when the pressing sleeve (5) is lifted to a reset state through the release of the elasticity of the spring (8);

the inner wall of the filter cover (2) is attached to the inner wall of the tube cavity of the split tube (1), a first flange connection disc (16) is arranged at one end of the split tube (1), a second flange connection disc (17) is arranged at the other end of the split tube (1), an annular groove (18) is formed in the first flange connection disc (16), an annular pressing plate (28) which is matched with the annular groove (18) after the filter cover (2) is installed on the split tube (1) is arranged at one end of the filter cover (2), the thickness of the annular pressing plate (28) is equal to the depth of the annular groove (18), and a plurality of fixing holes are formed in the first flange connection disc (16) and the second flange connection disc (17) of the split tube (1);

a check valve (19) is arranged on the tilting part (13) of the flexible pipe (12), and a spray head (20) facing the filter cover (2) is arranged at the tail end of the tilting part (13); the tilting part (13) is extruded to be bent upwards when the bent plate (15) descends, and when the tilting part (13) ascends, the tilting part is gradually separated from the bent plate (15) to release elasticity and bend downwards, so that the spray head (20) on the tilting part (13) is driven to complete the up-and-down swinging action at the inner end of the filter cover (2).

2. A filter device for a centrifuge air inlet according to claim 1, wherein: the wane (14) is a metal plate, and a fifteen-degree included angle for enabling the wane to incline upwards is formed between the wane and the inner wall of the tube cavity of the separate tube (1).

3. A filter device for a centrifuge air inlet according to claim 2, wherein: the filter mantle (2) comprises two part structures, one part structure is for laminating filtration end (21) on the pipe cavity inner wall of branch body pipe (1), another part is for being located the inner of filtration end (21) and towards fan-shaped groove end (22) in second flange connection dish (17), it faces in filter chamber (23) of annular clamp plate (28) to filter end (21) to be formed with the opening direction, be formed with between fan-shaped groove end (22) and filter chamber (23) and correspond arcwall face (24) in filter chamber (23), the range of involving of netlike filtration pore on filter mantle (2) includes in arcwall face (24), the top inclined plane of wane (14) and fan-shaped groove end (22) of filter mantle (2) are each other from top to bottom.

4. A filter device for a centrifuge air inlet according to claim 1, wherein: the top surface of the upper sealing plate (6) is connected with a pull rod (27), the pull rod (27) bends downwards from the top surface of the upper sealing plate (6) and then extends downwards and vertically from the periphery of the pipe (1), and a hanging ring (25) is installed at the bottom end of the pull rod (27).

5. A filter device for a centrifuge air inlet according to claim 1, wherein: the branch body pipe (1) is a transparent material pipe, flexible two pipe (26) are filled in the flexible pipe (12), the flexible two pipe (26) are filled in the pipe cavity scope of the flexible pipe (12) and the tilting part (13), and the S-shaped multi-section bending part (29) corresponding to the pipe cavity of the tilting part (13) is arranged on the flexible two pipe (26), one end of the flexible two pipe (26) upwards extends to be communicated with the lining pipe (10) along the pipe cavity of the flexible two pipe (26), and the other end of the flexible two pipe (26) is connected with the spray head (20) along the pipe cavity of the tilting part (13).