CN215539551U

CN215539551U - Dust removing device of printing machine

Info

Publication number: CN215539551U
Application number: CN202121809830.0U
Authority: CN
Inventors: 方利杰
Original assignee: Tongxiang Kaisheng Printing Co ltd
Current assignee: Tongxiang Kaisheng Printing Co ltd
Priority date: 2021-08-04
Filing date: 2021-08-04
Publication date: 2022-01-18
Anticipated expiration: 2031-08-04

Abstract

The application relates to a dust removal device of a printing machine, which relates to the field of printing machines and comprises an induced draft fan, a dust collection box which is arranged on the printing machine and is hollow inside, and a dust removal mechanism arranged between the induced draft fan and the dust collection box, one side of the dust collection box close to the printing machine is provided with a dust collection hole for dust on the surface of the corrugated board to pass through, the dust removal mechanism comprises a first box body with a hollow inner part and an HEPA high-efficiency filter screen arranged in the first box body, an air inlet pipe is fixedly connected between the dust collection box and the first box body, two ends of the air inlet pipe along the length direction are respectively communicated with the dust collection box and the interior of the first box body, draught fan lateral wall fixed mounting has the induced duct that is used for the induced air and the play tuber pipe that is used for the air-out, first box is kept away from air-supply line one side with the induced duct is kept away from draught fan one end intercommunication. This application has the effect that improves corrugated container board printing quality.

Description

Dust removing device of printing machine

Technical Field

The application relates to the field of printing machines, in particular to a dust removal device of a printing machine.

Background

The corrugated board is formed by gluing a paper board and at least one layer of corrugated paper, the corrugated paper board is generally prepared into a corrugated paper box through the working procedures of cutting, grinding, stacking, printing, pasting, forming and the like, the printing machine is equipment for printing characters or images, and the printing of the corrugated paper board is generally to print the stacked corrugated paper board one by one through the printing machine.

Chinese patent with publication number CN210655369U discloses a paper feeding device of a corrugated board color printing press, which comprises a main body table, a paper feeding mechanism installed on the main body table and used for transmitting corrugated boards, wherein the paper feeding mechanism comprises a paper baffle plate used for conveying single corrugated boards, a plurality of paper feeding rollers arranged on the upper surface of the main body table and capable of rotating, and a paper feeding motor driving the plurality of paper feeding rollers to rotate synchronously and installed on the main body table.

In view of the above-mentioned related technologies, the inventor believes that dust is attached to the surface of a corrugated board after the corrugated board is cut or polished, and when the corrugated board is transported by a paper feeding roller to be printed, white spots are easily formed on the printed product due to the dust attached to the surface of the corrugated board, so that the printing quality of the corrugated board is reduced.

SUMMERY OF THE UTILITY MODEL

In order to improve corrugated container board's printing quality, this application provides a dust collecting device of printing machine.

The application provides a dust removal device of printing machine adopts following technical scheme:

the utility model provides a dust removal device of printing machine, includes the draught fan, install on the printing machine and inside be hollow suction box and set up in the draught fan with dust removal mechanism between the suction box, the suction box is close to printing machine one side and sets up the dust absorption hole that can supply corrugated container board surface dust to pass through, dust removal mechanism including inside be hollow first box and install in the high-efficient filter screen of HEPA in the first box, the suction box with fixedly connected with air-supply line between first box, the air-supply line along its length direction's both ends respectively with the suction box with the inside intercommunication of first box, draught fan lateral wall fixed mounting has the induced duct that is used for the induced air and the play tuber pipe that is used for the air-out, first box is kept away from air-supply line one side with the induced duct is kept away from draught fan one end intercommunication.

Through adopting above-mentioned technical scheme, the user opens the suction fan, make the dust on corrugated paper surface along with the air through dust absorption hole entering to the suction box in, because be provided with the HEPA high efficiency filter screen in the first box, the HEPA high efficiency filter screen has good dust absorption effect, the air that has the dust attached to enters into to the first box in through the air-supply line and filters the back through the HEPA high efficiency filter screen, the air after the filtration flows in to the induced duct in, finally flow from the play tuber pipe department, the influence of corrugated container board surface dust to the follow-up printing of corrugated container board has been reduced, and then corrugated container board's printing quality has been improved.

The optional first box body comprises a connecting main body, a flow guide plate group and a connecting cover body arranged on one side of the connecting main body; a dust removal groove is formed in one side, close to the connecting cover body, of the connecting main body, the length direction of the dust removal groove is parallel to the length direction of the connecting main body, and the air inlet pipe is fixedly connected to the side wall of the connecting main body and communicated with the interior of the dust removal groove; the guide plate group and the HEPA high-efficiency filter screen are arranged in the dust removal groove and are sequentially arranged along the direction deviating from the air inlet pipe; the flow guide plate group comprises a first flow guide plate and a second flow guide plate, the first flow guide plate, the second flow guide plate and the HEPA high-efficiency filter screen are arranged in parallel in the width direction of the dust removal groove, the first flow guide plate is fixedly connected with the connecting cover body, the second flow guide plate is fixedly connected to the inner wall of the bottom of the dust removal groove, the first flow guide plate and the second flow guide plate are smaller than the dust removal groove in depth, and the first flow guide plate and the second flow guide plate are larger than half of the dust removal groove in depth.

Through adopting above-mentioned technical scheme, through setting up first guide plate and second guide plate for enter into the dust in the first box through the air-supply line and carry out the wadding flow, thereby be favorable to the dust deposit inside first box, thereby further improved the dust removal effect of this application.

Optionally, the connection cover body is detachably connected with the connection main body.

Through adopting above-mentioned technical scheme, connect the lid and can dismantle the connection in connecting subject to convenient to use person washs first guide plate and second guide plate, and convenient to use person cleans deposit and the inside dust of first box.

Optionally, the connecting body is close to connect lid one side and still seted up sliding groove, sliding groove with dust removal groove intercommunication, sliding groove's length direction with dust removal groove's width direction parallel arrangement, just sliding groove's length is greater than dust removal groove's width, just HEPA high efficiency filter screen sliding connection in sliding groove, just HEPA high efficiency filter screen's highly equal to sliding groove's groove depth.

Through adopting above-mentioned technical scheme, HEPA high efficiency filter screen sliding connection is in the sliding groove to the convenience that the user installed or dismantled HEPA high efficiency filter screen has been improved.

Optionally, the first guide plate with the second guide plate all is provided with a plurality of, a plurality of first guide plate is followed connecting body length direction equidistance sets up, and adjacent two all set up in between the first guide plate there is one the second guide plate.

Through adopting above-mentioned technical scheme, through setting up the first guide plate of polylith and second guide plate, improved the dust and carried out the time of wadding flow in first box to be favorable to more dust deposit and first box insidely, further improved the dust removal effect of this application.

Optionally, dust removal mechanism still including fixed even the connecting body is kept away from connecting pipe, fixed connection in air-supply line one side the connecting pipe is kept away from connecting body one side and inside be hollow second box and set up in active carbon filter screen in the second box, the connecting pipe along its length direction's both ends respectively with dust removal recess inside with the inside intercommunication of second box, the second box is kept away from connecting pipe one side with the induced duct is kept away from induced duct draught fan one end fixed connection, just the induced duct is close to second box one side with the inside intercommunication of second box.

Through adopting above-mentioned technical scheme, through setting up the active carbon filter screen to can carry out further filtration to the gas after filtering in the first box, thereby reduce the residual amount of dust in the induced duct department exhaust gas, thereby reduce the pollution of induced duct department exhaust gas to the workshop environment.

Optionally, the second box include with connecting pipe fixed connection purify the lid with can dismantle connect in purify the lid and keep away from the purification main part of connecting pipe one side, purify the main part and be close to purify lid one side and seted up and place the recess, the active carbon filter screen install in place in the recess, the connecting pipe along its length direction's both ends respectively with place the recess with the inside intercommunication of dust removal recess, purify the main part and keep away from purify lid one side with the induced duct is kept away from induced duct draught fan one end fixed connection, just the induced duct is close to second box one side with place the inside intercommunication of recess.

Through adopting above-mentioned technical scheme, because purify the lid and can dismantle with the purification main part and be connected to convenient to use person clears up the dust of deposit in the second box inside.

Optionally, place the recess including coaxial setting and the water conservancy diversion recess, joint recess and the lid recess that communicate each other, the lid recess the joint recess with the water conservancy diversion recess is along deviating from the connecting pipe direction sets gradually, the radial length of notch of joint recess is less than the radial length of notch of lid recess, the radial length of notch of joint recess is greater than the radial length of notch of water conservancy diversion recess, the active carbon filter screen install in the joint recess, just purify the lid can dismantle connect in the lid recess.

Through adopting above-mentioned technical scheme, through setting up the lid recess for purify the lid and purify the connection between the main part inseparabler, and connect in the lid recess through dismantling the lid recess, thereby improved the convenience to activated carbon filter screen surface clearance.

Optionally, the radial length of active carbon filter screen is greater than the radial length of the notch of water conservancy diversion recess, the radial length less than or equal to of outer wall of active carbon filter screen the radial length of the notch of joint recess, purify the lid and keep away from connecting pipe one side fixedly connected with butt block, butt block sliding connection in the joint recess, just the butt block is kept away from purify lid one side support tightly in the active carbon filter screen is kept away from induced duct one side.

Through adopting above-mentioned technical scheme, through setting up the butt block for when the active carbon filter screen sets up in the joint recess, the butt block can carry on spacingly to the position of active carbon filter screen along purifying the main part axis direction, makes the active carbon filter screen can install in purifying the main part steadily.

In summary, the present application includes at least one of the following beneficial technical effects:

1. the dust removing mechanism is arranged, so that dust on the surface of corrugated paper flows into the first box body through the dust suction box under the driving of the suction fan, and after primary filtration is carried out through the HEPA high-efficiency filter screen with excellent dust suction effect, the filtered air finally flows out of the air outlet pipe through the air guide pipe, thereby reducing the influence of the dust on the surface of the corrugated paper board on the subsequent printing of the corrugated paper board and further improving the printing quality of the corrugated paper board;

2. by arranging the guide plate group, dust flowing into the first box body flows afterward through the first guide plate and the second guide plate, so that part of dust is deposited in the first box body, and then is subjected to primary filtering through the HEPA high-efficiency filter screen, so that the influence of the dust on the surface of the corrugated board on the subsequent printing of the corrugated board is reduced, and the printing quality of the corrugated board is further improved;

3. through setting up second box and active carbon filter screen to further improved the filter effect of this application to the dust, thereby reduced the residual amount of dust among the induced duct department exhaust gas, and then reduced the pollution of induced duct department exhaust gas to the workshop environment.

Drawings

FIG. 1 is a schematic view of a structure for embodying the position of a dust box and a printing machine;

FIG. 2 is a schematic diagram of the overall structure of an embodiment of the present application;

FIG. 3 is an exploded view of the first enclosure in an embodiment of the present application;

fig. 4 is an exploded view of the second case in the embodiment of the present application.

Reference numerals: 1. a dust collection box; 11. a dust collection hole; 2. an air inlet pipe; 3. a dust removal mechanism; 31. a first case; 311. a connecting body; 3111. a sliding groove; 3112. a dust removal groove; 312. connecting the cover body; 313. a flow guide plate group; 3131. a first baffle; 3132. a second baffle; 32. HEPA high-efficiency filter screen; 33. a connecting pipe; 34. a second case; 341. a purifying main body; 342. a purifying cover body; 343. placing a groove; 3431. a groove of the cover body; 3432. clamping the groove; 3433. a flow guide groove; 344. abutting against the block body; 35. an active carbon filter screen; 4. an induced draft pipe; 5. an induced draft fan; 6. an air outlet pipe; 7. a printing press.

Detailed Description

The present application is described in further detail below with reference to figures 1-4.

The embodiment of the application discloses dust removal device of printing machine. Referring to fig. 1, a dust removing device of a printing machine includes a dust suction box 1 fixedly mounted on the upper surface of a conveyor belt of the printing machine 7 through bolts, an induced draft fan 5 disposed on one side of the printing machine 7, and a dust removing mechanism 3 for adsorbing and filtering dust, wherein the dust removing mechanism 3 is disposed between the induced draft fan 5 and the dust suction box 1, and the dust removing mechanism 3 is connected with the dust suction box 1 and the induced draft fan 5 through pipes.

Referring to fig. 1 and 2, the inside cavity that is of suction box 1, suction box 1 keeps away from 7 conveyer belt one side fixedly connected with air-supply line 2 of printing machine, and suction box 1 keeps away from air-supply line 2 one side and has seted up a plurality of

dust absorption hole

11, 5 lateral wall flange connections of draught fan have be used for the induced air pipe 4 of induced air and be used for exhaust air's play tuber pipe 6, the adnexed dust in draught fan 5 drive corrugated container board surface flows to suction box 1 inside from dust absorption hole 11 along with the air, then under the water conservancy diversion effect of air-supply line 2, the clean air that obtains after carrying the air of dust and passing through dust removal mechanism 3 adsorption filtration, clean air continues to flow to induced air pipe 4 department at the draught fan 5 drainage and finally flows from play tuber pipe 6 department.

Referring to fig. 2 and 3, dust removal mechanism 3 includes along deviating from first box 31 and the second box 34 of dust collection box 1 direction in proper order, first box 31 is the cuboid, second box 34 is the cylinder, and the axis direction of second box 34 and the length direction parallel arrangement of first box 31, dust collection box 1 one end fixed connection is kept away from in first box 31 second box 34 one side to air-supply line 2, and air-supply line 2 along its length direction's both ends respectively with the inside and the inside intercommunication of first box 31 of dust collection box 1. A plurality of connecting pipes 33 are fixedly connected between the first box body 31 and the second box body 34, the plurality of connecting pipes 33 are arranged along the circumferential direction of the end face of the second box body 34 at equal intervals, and both ends of each connecting pipe 33 along the length direction of the connecting pipe 33 are communicated with the inside of the first box body 31 and the inside of the second box body 34. One end, far away from the induced draft fan 5, of the induced draft pipe 4 is fixedly connected to one side, far away from the first box 31, of the second box 34, and one side, close to the second box 34, of the induced draft pipe 4 is communicated with the inside of the second box 34.

Referring to fig. 2 and 3, the first box 31 includes a connection main body 311, a baffle group 313 and a connection cover 312 detachably connected to the upper surface of the connection main body 311 by bolts, a dust removal groove 3112 is formed at one side of the connection main body 311 close to the connection cover 312, the length direction of the dust removal groove 3112 is parallel to the length direction of the connection main body 311, the connection pipe 33 and the air inlet pipe 2 are fixedly connected to two sides of the length direction of the connection main body 311, and one opposite side of the connection pipe 33 and one opposite side of the air inlet pipe 2 are both communicated with the inside of the dust removal groove 3112. Connecting body 311 is close to connecting lid 312 one side and still offers the slip recess 3111 with dust removal recess 3112 intercommunication, and the projection part of slip recess 3111 and dust removal recess 3112 on the horizontal plane is repeated, and the length direction of slip recess 3111 and connecting body 311's width direction parallel arrangement, the length of slip recess 3111 is greater than dust removal recess 3112's width, and sliding connection has HEPA high efficiency filter screen 32 in slip recess 3111, HEPA high efficiency filter screen 32's height is equal to dust removal recess 3112's groove depth.

Referring to fig. 2 and 3, the guide plate group 313 is disposed in the dust removal groove 3112, and the guide plate group 313 is disposed on one side of the HEPA high efficiency filter 32 away from the connection pipe 33, the guide plate group 313 includes a second guide plate 3132 and three first guide plates 3131, length directions of the first guide plates 3131 and the second guide plates 3132 are both parallel to a width direction of the connection main body 311, the three first guide plates 3131 are all welded to a lower surface of the connection cover 312, the three first guide plates 3131 are equidistantly disposed along the length direction of the connection cover 312, a second guide plate 3132 is disposed between two adjacent first guide plates 3131, one side of each second guide plate 3132 away from the connection cover 312 is all welded to an inner wall of a groove bottom of the dust removal groove 3112, and a height of each first guide plate 3131 and each second guide plate 3132 is two thirds of a groove depth of the dust removal groove 3112.

Referring to fig. 4, the second box 34 includes a cleaning cover 342 in a shape of a circular cake, a circular abutting block 344 and a cleaning body 341 in a shape of a circular cake and having a hollow interior, the cleaning cover 342 is fixedly connected to one end of the connecting pipe 33 far away from the connecting body 311, the cleaning body 341 is disposed on one side of the cleaning cover 342 far away from the connecting pipe 33, one end of the induced air pipe 4 far away from the induced air fan 5 is flange-connected to one side of the cleaning body 341 far away from the cleaning cover 342, a placing groove 343 is disposed on one side of the cleaning body 341 near the cleaning cover 342, the placing groove 343 includes a cover groove 3431, a clamping groove 3432 and a guiding groove 3433 sequentially connected along the axial direction of the cleaning body 341, one side of the cover groove 3431 far away from the clamping groove is connected to the outside, the cleaning cover 342 is detachably connected to the cover groove 3431 by bolts, one end of the connecting pipe 33 near the cleaning body 341 is connected to the interior of the cover groove 3431, one end of the induced duct 4 close to the purifying main body 341 is communicated with the inside of the flow guiding groove 3433, the radial length of the notch of the clamping groove 3432 is greater than that of the flow guiding groove 3433, and the radial length of the notch of the clamping groove 3432 is less than that of the cover body groove 3431.

Referring to fig. 4, the joint has active carbon filter screen 35 in the joint recess 3432, active carbon filter screen 35, purify main part 341 and purify the coaxial setting of lid 342, the radial length of active carbon filter screen 35 outer wall is less than the radial length of the notch of joint recess 3432, and the radial length of nature carbon filter screen 35 outer wall is greater than the radial length of the notch of water conservancy diversion recess 3433, and butt block 344 sliding connection is in joint recess 3432, and butt block 344 integrated into one piece is close to active carbon filter screen 35 one side in purifying the lid 342, and butt block 344 keeps away from to purify lid 342 one side butt and keep away from induced duct 4 one side in active carbon filter screen 35.

The implementation principle of the dust removal device of the printing machine in the embodiment of the application is as follows: the user opens the induced draft fan 5, the dust attached on the surface of the corrugated board flows to the inside of the dust collection box 1 through the dust collection holes 11 under the driving of the induced draft fan 5, then, the air with dust flows from the inside of the dust box 1 to the inside of the connection body 311 by the flow guiding action of the air inlet duct 2, the air with dust flows by the flow guiding action of the first flow guiding plate 3131 and the second flow guiding plate 3132, so that a part of dust is deposited in the dust removing groove 3112, then, the air carrying the dust passes through the HEPA high efficiency filter screen 32, so that most of the dust can be adsorbed on the HEPA high efficiency filter screen 32, the air after adsorption and filtration flows into the purifying main body 341 through the connecting pipe 33, the air with a small amount of dust is further adsorbed and filtered by the activated carbon filter screen 35 to obtain clean air, and the clean air is finally discharged to the outside from the air outlet pipe 6 under the flow guiding effect of the air guiding pipe 4; when the user stops the print job, the user closes draught fan 5, dismantle the bolt between lid 312 and connecting body 311, make connecting body 311 take first guide plate 3131 from the roll-off in dust removal recess 3112, the realization is to the clearance of first guide plate 3131 and second guide plate 3132, the user clears up or changes HEPA high efficiency filter screen 32 roll-off from the interior roll-off of sliding recess 3111, the user is dismantled the bolt between lid 342 and the purification main body 341 with purifying, make purification lid 342 drive butt block 344 take out from joint recess 3432, the user takes out activated carbon filter screen 35 from joint recess 3432 and clears up or change after that.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims

1. The utility model provides a dust collector of printing machine which characterized in that: including draught fan (5), install on printing machine (7) and inside be hollow suction box (1) and set up in draught fan (5) with dust removal mechanism (3) between suction box (1), suction box (1) is close to printing machine (7) one side and sets up dust absorption hole (11) that can supply corrugated container board surface dust to pass through, dust removal mechanism (3) including inside be hollow first box (31) and install in HEPA high efficiency filter screen (32) in first box (31), suction box (1) with fixedly connected with air-supply line (2) between first box (31), air-supply line (2) along its length direction both ends respectively with suction box (1) with the inside intercommunication of first box (31), draught fan (5) lateral wall fixed mounting has induced duct (4) that are used for the induced air and air outlet pipe (6) that are used for the air-out, the first box body (31) is far away from one side of the air inlet pipe (2) and the induced draft pipe (4) is far away from one end of the induced draft fan (5) to be communicated.

2. A dust removing device for a printing press according to claim 1, wherein: the first box body (31) comprises a connecting main body (311), a guide plate group (313) and a connecting cover body (312) arranged on one side of the connecting main body (311); a dust removal groove (3112) is formed in one side, close to the connecting cover body (312), of the connecting body (311), the length direction of the dust removal groove (3112) is parallel to the length direction of the connecting body (311), and the air inlet pipe (2) is fixedly connected to the side wall of the connecting body (311) and communicated with the interior of the dust removal groove (3112); the guide plate group (313) and the HEPA high-efficiency filter screen (32) are arranged in the dust removal groove (3112) and are sequentially arranged along the direction departing from the air inlet pipe (2); deflector group (313) include first guide plate (3131) and second guide plate (3132), first guide plate (3131), second guide plate (3132) with the length direction of HEPA high efficiency filter screen (32) all with the width direction parallel arrangement of dust removal recess (3112), first guide plate (3131) with connect lid (312) fixed connection, second guide plate (3132) fixed connection in dust removal recess (3112) tank bottom inner wall, first guide plate (3131) with the height of second guide plate (3132) all is less than the groove depth of dust removal recess (3112), just first guide plate (3131) with the height of second guide plate (3132) all is greater than the half of dust removal recess (3112) groove depth.

3. A dust removing device for a printing press according to claim 2, wherein: the connecting cover body (312) is detachably connected with the connecting main body (311).

4. A dust removing device for a printing press according to claim 3, wherein: connecting body (311) are close to connect lid (312) one side and have still seted up slip recess (3111), slip recess (3111) with dust removal recess (3112) intercommunication, the length direction of slip recess (3111) with the width direction parallel arrangement of dust removal recess (3112), just the length of slip recess (3111) is greater than the width of dust removal recess (3112), just HEPA high efficiency filter net (32) sliding connection in slip recess (3111), just the height of HEPA high efficiency filter net (32) equals the groove depth of slip recess (3111).

5. A dust removing device for a printing press according to claim 3, wherein: the first guide plate (3131) and the second guide plate (3132) are provided with a plurality of blocks, the first guide plate (3131) is followed connecting body (311) length direction equidistance sets up, and adjacent two all set up between the first guide plate (3131) in there is one second guide plate (3132).

6. A dust removing device for a printing press according to claim 2, wherein: dust removal mechanism (3) still including fixed even connecting body (311) are kept away from connecting pipe (33), the fixed connection in of air-supply line (2) one side connecting body (311) one side and inside be hollow second box (34) and set up in active carbon filter screen (35) in second box (34), connecting pipe (33) along its length direction's both ends respectively with dust removal recess (3112) inside with the inside intercommunication of second box (34), second box (34) are kept away from connecting pipe (33) one side with induced duct (4) are kept away from draught fan (5) one end fixed connection, just induced duct (4) are close to second box (34) one side with the inside intercommunication of second box (34).

7. A dust removing device for a printing press according to claim 6, wherein: the second box body (34) comprises a purification cover body (342) fixedly connected with the connecting pipe (33) and a purification main body (341) detachably connected with one side of the purification cover body (342) far away from the connecting pipe (33), a placing groove (343) is arranged on one side of the purifying main body (341) close to the purifying cover body (342), the active carbon filter screen (35) is arranged in the placing groove (343), the two ends of the connecting pipe (33) along the length direction are respectively communicated with the placing groove (343) and the dust removing groove (3112), one side of the purification main body (341) far away from the purification cover body (342) is fixedly connected with one end of the induced draft pipe (4) far away from the induced draft fan (5), and one side of the induced draft pipe (4) close to the second box body (34) is communicated with the inside of the placing groove (343).

8. A dust removing device for a printing press according to claim 7, wherein: placing recess (343) including coaxial setting and the water conservancy diversion recess (3433) that communicate each other, joint recess (3432) and lid recess (3431), joint recess (3432) with water conservancy diversion recess (3433) are along deviating from connecting pipe (33) direction sets gradually, the radial length of notch of joint recess (3432) is less than the radial length of notch of lid recess (3431), the radial length of notch of joint recess (3432) is greater than the radial length of notch of water conservancy diversion recess (3433), install active carbon filter screen (35) in joint recess (3432), just purification lid (342) can dismantle connect in lid recess (3431).

9. A dust removing device for a printing press according to claim 8, wherein: the radial length of active carbon filter screen (35) is greater than the radial length of notch of water conservancy diversion recess (3433), the radial length of outer wall of active carbon filter screen (35) is less than the radial length of notch of joint recess (3432), purify lid (342) and keep away from connecting pipe (33) one side fixedly connected with butt block (344), butt block (344) sliding connection in joint recess (3432), just butt block (344) are kept away from purify lid (342) one side support tightly in active carbon filter screen (35) is kept away from induced duct (4) one side.