CN109173405B

CN109173405B - Fountain solution filtering treatment device

Info

Publication number: CN109173405B
Application number: CN201811151793.1A
Authority: CN
Inventors: 黄建成
Original assignee: Anhui Viboo Print Technology Co ltd
Current assignee: Anhui Viboo Print Technology Co ltd
Priority date: 2018-09-29
Filing date: 2018-09-29
Publication date: 2020-10-30
Anticipated expiration: 2038-09-29
Also published as: CN109173405A

Abstract

The invention discloses a fountain solution filtering treatment device which is connected with a printer water tank through a connecting pipeline to form a fountain solution circulating pipeline for a printer, wherein the filtering treatment device comprises an upper connector, a lower connector and a filtering tank, the upper connector and the lower connector are respectively and correspondingly fixed on the side wall of the printer water tank through a support, the input end of the upper connector and the output end of the lower connector are respectively and sequentially connected with the connecting pipeline in the circulating pipeline, a vertical shaft is vertically arranged in the center of the lower connector, the center of the filtering tank is sleeved on the vertical shaft and can rotate, 3 groups of identical independent filtering chambers are symmetrically arranged on the filtering tank along the axis, and the top input end and the bottom output end of the 3 groups of independent filtering chambers can be respectively in butt joint communication with the upper connector and the lower connector through rotation. The invention has the advantages that: the rotary filter tank and the auxiliary device thereof are adopted, so that the rapid switching of the filter medium is realized, the recycling of the mixed solution is not influenced, and the filtering efficiency and the filtering effect of the fountain solution are effectively improved.

Description

Fountain solution filtering treatment device

Technical Field

The invention relates to the technical field of printing processing equipment, in particular to a fountain solution filtering processing device.

Background

The effective utilization problem of fountain solution is always the problem to be solved urgently in the industry, the prior technical scheme is mainly that the primary filtration is carried out, then the fine filtration is carried out, finally the fountain solution is added into a water tank, the detection of each index is carried out in the water tank, and according to the detection result, various buffering agents or new substances such as fountain solution, alcohol, water and the like are added into the water tank so as to reach the use standard of the fountain solution. Therefore, the prior art has some defects which are mainly shown in the following steps: in the fountain solution circulating filtration process, the filter medium can only be cleared away through modes such as back flush when blocking, and can not be switched in time, thereby realizing the change without stopping the machine, leading the filtration efficiency to be lower and lower, and finally leading the water tank to be pumped out and overflowing easily when the filter medium blocks, damaging equipment and wasting resources.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a fountain solution circulating system which has the characteristics and the capability of quickly replacing a filter medium and uniformly mixing a solution.

The invention adopts the following technical scheme to solve the technical problems: the utility model provides a fountain solution filtration processing apparatus, passes through the connecting tube with the printing machine water tank and is connected, constitutes printing machine fountain solution circulation pipeline, a serial communication port, filtration processing apparatus includes top connection, lower clutch and crosses the jar, the top connection with the lower clutch corresponds respectively through the support and fixes on the lateral wall of printing machine water tank, the input of top connection with the output of lower clutch is connected according to the order with the connecting tube in the circulation pipeline respectively, the vertical scroll that is provided with in lower clutch center, cross the jar center cover and establish can the vertical scroll be rotatory for the axle center on the vertical scroll, it is provided with 3 groups the same independent filter chamber to cross the jar along the axle center symmetry, the top input of 3 groups independent filter chamber and bottom output accessible rotation respectively with top connection and lower clutch butt joint intercommunication form the passageway. The system realizes the rapid switching of the filter medium through the rotary butt joint of the filter tanks, and enables various technical indexes of the mixed solution to meet the use requirements through the water liquid supplementing device and the cooling device.

Preferably, the filter tank is a cylindrical member, a through hole is formed in the center of the filter tank, and a plurality of ball bearings are arranged in the through hole; the vertical shaft penetrates through the through hole and the ball bearings inside the through hole to form interference connection with the filter tank, so that the filter tank has the capability of rotating by taking the vertical shaft as an axis; 3 identical vertically downward grooves are symmetrically formed in the top surface of the filter tank along the outer edge of the through hole and used for placing 3 groups of independent filter chambers, and a liquid discharge hole is formed in the bottom of each groove; independent filter chamber includes filter core, top cap, input end and output end, the filter core sets up in the recess, top cap detachably sets up the upper portion of recess will the filter core butt is fixed in the recess, the input end sets up on the top cap, the bottom of input end is passed the top cap stretches into in the filter core, the top of input end with the top connection intercommunication, the output end sets up the lower part of outage, the bottom of output end is passed the outage stretches into in the recess, the bottom of output end is provided with soft sealing head, be used for with the sealed jam in space between outage and the output end, the top of output end with the lower clutch intercommunication.

Preferably, the top end of the input end is of an umbrella-shaped structure, a jacking spring is sleeved between the top end of the input end and the top cover, and two ends of the jacking spring are fixedly connected with the input end and the top cover respectively, so that the input end has up-and-down elastic resetting capability; the top connection bottom corresponds to the upper interface that a horn mouth shape was seted up on the top of input end, upper interface is located on the rotatory orbit of input end, be provided with soft sealing ring on the upper interface inner wall, upper interface both sides are followed the rotatory orbit of input end has seted up the spacing logical groove of arc, the width that the spacing logical groove of arc slightly is greater than the maximum external diameter on input end top.

Preferably, the top end of the output end is of an umbrella-shaped structure, a downward pressing spring is sleeved between the top end of the output end and the bottom surface of the filter tank, and two ends of the downward pressing spring are fixedly connected with the output end and the bottom surface of the filter tank respectively, so that the output end has the up-and-down elastic resetting capability; the lower clutch upper surface with the vertical scroll has been seted up as the center ring shape spacing recess, ring shape spacing recess with the rotatory orbit coincidence of output end, ring shape spacing recess is last to correspond to the lower interface of 3 the same horn mouth shapes is seted up to the top symmetry of output end, 3 individual lower interface respectively with the relative position coincidence of the output end of 3 independent filter chambers of group, and wherein have 1 lower interface with the upper interface coincides on vertical position, be provided with soft sealing ring on the lower interface inner wall, ring shape spacing recess's width slightly is greater than the maximum external diameter on output end top, 3 individual lower interface respectively with the output intercommunication of lower clutch.

Optimized, the lower clutch output with be provided with the vacuum filtration jar between the connecting tube, vacuum filtration jar both ends respectively with the lower clutch output with the connecting tube intercommunication forms the route, be provided with the suction filtration interface on the lateral wall of vacuum filtration jar, the suction filtration interface passes through the rubber tube and is connected with vacuum pump.

Preferably, the input end of the upper joint is provided with a buffer device, and the buffer device comprises a buffer tube, an electromagnetic control valve, a buffer piston and a bearing spring; the buffer tube is of a hollow structure, the buffer tube is vertically and fixedly arranged on the upper joint, the bottom end of the buffer tube is communicated with the input end of the upper joint, the middle part of the buffer tube is provided with a circulating liquid input port, the circulating liquid input port is communicated with the connecting pipeline, and the top of the buffer tube is provided with an L-shaped bearing support rod; the electromagnetic control valve is arranged on the wall of the buffer tube between the bottom end of the buffer tube and the circulating liquid inlet and is used for controlling the input of the fountain solution circulating liquid; the buffer piston is arranged in the upper part of the buffer tube, and the outer diameter of the buffer piston is slightly smaller than the inner diameter of the buffer tube; one end of the bearing spring is connected with the top of the buffer piston, and the other end of the bearing spring is connected with the L-shaped cross rod of the bearing support rod to bear the buffer piston.

Preferably, the filter element comprises two layers of U-shaped shells sleeved inside and outside, wherein the upper end of the inner shell is communicated with the input end, the outer wall of the neck of the inner shell is provided with an external thread, the inner wall of the port of the outer shell is correspondingly provided with an internal thread, and the outer shell is in threaded connection with the inner shell through the internal thread; an annular wall-hanging skirt edge is arranged at the upper part of the external thread of the inner shell, an annular wall-hanging step is arranged on the inner wall of the groove corresponding to the wall-hanging skirt edge, the inner shell and the outer shell are suspended and carried in the groove through the wall-hanging skirt edge, and a gap is formed between the bottom of the outer shell and the concave bottom of the groove; the top cover is of a groove-shaped structure with a downward concave surface, the inner wall of the concave surface of the top cover is sleeved on the outer wall of the upper end port of the inner shell and abuts against the wall hanging skirt edge, external threads are arranged on the outer wall of the concave surface of the top cover, internal threads are arranged at the corresponding position of the groove, and the top cover is in threaded connection with the groove through the external threads; all seted up a plurality of filtration holes on interior casing and the outer casing lateral wall to form the route, interior intussuseption of casing is filled with the filter pulp, be provided with hollow fiber membrane filter layer in the shell body, the filter pulp soaks dry process through nano silver solution to prevent to soak the filter pulp that has the fountain solution and contact with the air in the use or the in-process of stewing, generate mildew or mould.

The use process of the filter device is as follows: when the mixed solution flows out of the water tank of the printing machine and is filtered by the filter tank, when more impurities are filtered after a period of time, the filter medium is blocked and the filter element needs to be replaced, the electromagnetic control valve on the buffer tube is closed, the circulating liquid is suspended, the filter tank is rotated again, the independent filter chamber in use is separated from the upper joint and the lower joint, and the next group of independent filter chambers to be used are connected into the upper joint and the lower joint in a proper way, the separation process and the connection process mainly depend on the elastic reset function of the input end and the output end at the upper end and the lower end of the independent filter chamber, the input end and the output end are compressed and slide out along the inner wall of the horn-shaped interface by rotating the horizontal acting force applied, and the interfaces are pushed under the action of the spring when the next group of the input end and the output end rotate to the horn-shaped, the butt joint is realized, the switching is completed, the arc-shaped limiting through groove on the upper joint and the annular limiting groove on the lower joint are used for limiting the moving tracks of the input end and the output end, and the rotating process is more accurate and stable; after the switching is finished, opening an electromagnetic control valve on the buffer tube, and opening a passage to recover the flow circulation of the mixed solution;

the buffer device has the effects that when the buffer tube is closed, the mixed solution in the circulating pipeline continues to flow and discharge, the inner wall space at the upper part of the buffer tube is gradually filled, the buffer piston is jacked upwards, when the buffer tube is jacked to a certain height, the bearing spring at the upper part of the buffer piston realizes pressure conversion, downward resilience force is applied to the buffer piston, further, the mixed solution in the circulating pipeline is pressed to continue to flow until the electromagnetic control valve is opened, and the rotation switching of the filter tank can be completed in the time period;

when the switched independent filter chamber is moved out of the upper connector, most of filtrate is still remained in the independent filter chamber, an output end head at the bottom of the independent filter chamber is still communicated with the lower connector, at the moment, the vacuum suction filtration pump is started to carry out vacuum suction filtration on the independent filter chamber, the filtrate enters the vacuum suction filtration tank through the output end head, a lower connector on the lower connector and an internal pipeline of the independent filter chamber and flows into a circulation pipeline at the lower stage, because the vacuum suction filtration pump is dependent on air circulation, the vacuum suction filtration process only acts on the empty independent filter chamber, no influence is generated on the independent filter chamber in use, and after the suction filtration is finished, the vacuum suction filtration pump is closed;

the filter layer in the independent filter chamber after the switching is finished is replaced, the top cover is unscrewed at first, the limitation of the top cover on the filter element is removed, then the filter element is drawn out, the filter cotton filter layer in the inner shell is taken out, then the outer shell is unscrewed, the hollow fiber membrane filter layer in the outer shell is taken out, then a new hollow fiber membrane filter layer is placed in, the outer shell after the filter layer is replaced is screwed in the outer wall of the inner shell, and finally the new filter cotton filter layer is placed in the inner shell, so that the filter element is replaced; inserting the replaced filter element into the groove of the original filter tank, installing and screwing the top cover to fix the filter element, thereby completing the replacement of the independent filter chamber until the next switching use is finished;

in the design of the inner shell and the outer shell, firstly, a plurality of filtering holes are formed in the side walls of the inner shell and the outer shell, and the bottoms of the filtering holes are closed (U-shaped tube structures), so that filtered liquid is only filtered out from the side walls of the shell and cannot be gathered at the bottom of the shell, the filter element is more uniformly used, and the service life and the filtering efficiency are higher; and secondly, the filter element is arranged in the groove of the filter tank in a suspended manner, so that a liquid discharge space and a channel are formed between the filter hole of the filter element and the liquid discharge hole at the bottom of the groove, and the filtrate flows smoothly.

The invention has the advantages that: the invention adopts the design of the rotary filter tank and the auxiliary devices thereof, realizes the rapid switching of the filter medium, does not influence the recycling of the mixed solution, effectively improves the filtering efficiency and the using effect of the fountain solution, and has excellent practical value.

Drawings

FIG. 1 is a schematic view showing the overall layout of a fountain solution circulation processing system according to an embodiment;

FIG. 2 is a schematic diagram of the internal structure of the cooling device in the embodiment;

FIG. 3 is a schematic view showing the overall structure of the filtration apparatus in the embodiment;

FIG. 4 is a plan view of a lower joint of the filter device in the embodiment;

FIG. 5 is a partial enlarged schematic view of a filter device according to an embodiment;

FIG. 6 is a schematic view showing an internal structure of a buffer device according to an embodiment;

fig. 7 is a schematic view of the internal structure of the filter element in the embodiment.

Detailed Description

The present invention is described in detail below with reference to the attached drawings.

As shown in fig. 1, a fountain solution circulation processing system comprises a printing machine water tank 1 matched with a printing machine water bucket tank, wherein the printing machine water tank 1 is sequentially communicated with a filter device 3, a water liquid supplementing device 4 and a cooling device 5 through an output interface via a connecting pipeline 2, and is returned to the other access port of the printing machine water tank 1 through the output pipeline of the cooling device 5, so that a fountain solution circulation pipeline for a printing machine is formed; wherein, filter equipment 3 includes top connection 31, lower clutch 32 and filters jar 33, top connection 31 with lower clutch 32 corresponds respectively through support 34 and fixes on the lateral wall of printing machine water tank 1, top connection 31's input with lower clutch 32's output is connected according to the order with connecting tube 2 in the circulating line respectively, lower clutch 32 center is vertical to be provided with a vertical scroll 35, it establishes to filter jar 23 centre the vertical scroll 35 is last and can be the vertical scroll 35 rotatory for the axle center, filter jar 33 is last to be provided with 3 groups the same independent filter chamber 36 along the axle center symmetry, 3 groups the top input of independent filter chamber 36 and bottom output accessible rotation respectively with top connection 31 and lower clutch 32 butt joint intercommunication form the passageway.

The water liquid supplementing device 4 comprises a liquid supplementing cavity 41, a water supplementing tank 42, a fountain solution supplementing tank 43, a detection device 44 and a control device 45, wherein two ends of the liquid supplementing cavity 41 are respectively communicated with the circulating pipeline, the input end of the liquid supplementing cavity 41 is provided with a water supplementing interface 411 and a fountain solution supplementing interface 412, the water supplementing interface 411 is connected with the output end of the water supplementing tank 42 through a rubber pipe, the fountain solution supplementing interface 412 is connected with the output end of the fountain solution supplementing tank 43 through another rubber pipe, and the output ends of the water supplementing tank 42 and the fountain solution supplementing tank 43 are both provided with a supplementing liquid control valve 46; the detection device 44 comprises a floating ball 441 which is arranged in the printer water tank 1 and can float on the surface of the liquid to detect the height of the liquid level of the mixed solution, and a conductivity sensor 442 for detecting the conductivity value of the mixed solution in the printer water tank 1 and sending a signal, the control device 45 receives the signal sent by the conductivity sensor 442, and when the detected conductivity value is lower than a preset value, the control device controls the supplementary liquid control valve 46 to open; the control device 45 receives the height information of the floating ball 441, and controls the replenishment liquid control valve 46 to be opened when the floating ball 441 is lower than a preset height so as to replenish fountain solution and water; and a driving pump 6 is arranged on a circulating pipeline between the water liquid supplementing device 4 and the cooling device 5, and the driving pump 6 pumps the mixed solution flowing through the water liquid supplementing device 4 into the cooling device 5.

As shown in fig. 2, the cooling and temperature lowering device 5 includes a liquid returning cavity 51 and a circulating condensate pipe 52, two ends of the liquid returning cavity 51 are respectively communicated with the circulating pipeline, a spiral diversion trench 53 is disposed in the liquid returning cavity 51, and an input port and an output port of the liquid returning cavity 51 are both extended outwards along the spiral diversion trench 53; the circulating condensate pipe 52 is arranged on the outer wall of the liquid return cavity 51, the circulating condensate pipe 52 is externally connected with condensate water, and the circulating direction of the condensate water is consistent with the circulating direction of the liquid return cavity 51. The purpose of the extension design of the spiral diversion trench 53 in the liquid return cavity 51 and the ports at the two ends of the liquid return cavity 51 is to enable the mixed solution flowing through the spiral diversion trench to form high-speed rotary flow, so that the mixed solution is more uniform, and the subsequent performance test and use are facilitated.

As shown in fig. 3-5, the filter tank 33 is a cylindrical member, a through hole 331 is formed in the center of the filter tank 33, and a plurality of ball bearings 332 are disposed in the through hole 331; the vertical shaft 35 passes through the through hole 331 and the plurality of ball bearings 332 inside the through hole to form interference connection with the filter tank 33, so that the filter tank 33 has the capability of rotating around the vertical shaft 35 as an axis; 3 identical vertical downward grooves 333 are symmetrically formed in the top surface of the filter tank 33 along the outer edge of the through hole 331 and used for placing 3 groups of independent filter chambers 36, and a liquid discharge hole 334 is formed in the bottom of each groove 333; the independent filter chamber 36 includes a filter element 361, a top cover 362, an input end 363 and an output end 364, the filter element 361 is arranged in the groove 333, the top cover 362 is detachably arranged on the upper part of the groove 333 and abuts against and fixes the filter element 361 in the groove 333, the input end 363 is arranged on the top cover 362, the bottom end of the input end 363 penetrates through the top cover 362 to extend into the filter element 361, the top end of the input end 363 is communicated with the upper joint 31, the output end 364 is arranged at the lower part of the liquid discharge hole 334, the bottom end of the output tip 364 extends through the drain hole 334 and into the recess 333, the bottom end of the output head 364 is provided with a soft sealing head 365 for sealing and blocking the gap between the drain hole 334 and the output head 364, and the top end of the output head 364 is communicated with the lower joint.

The top end of the input end 363 is of an umbrella-shaped structure, a jacking spring 366 is sleeved between the top end of the input end 363 and the top cover 362, and two ends of the jacking spring 366 are fixedly connected with the input end 363 and the top cover 362 respectively, so that the input end 363 has elastic resetting capability from top to bottom; the bottom of the upper joint 31 corresponding to the top end of the input end 363 is provided with a bell mouth-shaped upper interface 311, the upper interface 311 is located on the rotation track of the input end 363, the inner wall of the upper interface 311 is provided with a flexible sealing ring 312, two sides of the upper interface 311 are provided with an arc-shaped limiting through groove 313 along the rotation track of the input end 363, and the width of the arc-shaped limiting through groove 313 is slightly larger than the maximum outer diameter of the top end of the input end 363.

The top end of the output end head 364 is in an umbrella-shaped structure, a downward pressing spring 367 is sleeved between the top end of the output end head 364 and the bottom surface of the filter tank 33, and two ends of the downward pressing spring 367 are respectively fixedly connected with the output end head 364 and the bottom surface of the filter tank 33, so that the output end head 364 has the up-and-down elastic resetting capability; an annular limiting groove 321 is formed in the upper surface of the lower connector 32 by taking the vertical shaft 35 as a center, the annular limiting groove 321 is overlapped with a rotation operation track of the

output end head

364, 3 identical lower interfaces 322 in a bell mouth shape are symmetrically formed in the annular limiting groove 321 corresponding to the top end of the output end head 364, the 3 lower interfaces 322 are respectively overlapped with the relative positions of the output end heads 364 of the 3 groups of independent filter chambers 36, 1 lower interface 322 is vertically overlapped with the upper interface 311, a flexible sealing ring 323 is arranged on the inner wall of each lower interface 322, the width of the annular limiting groove 321 is slightly larger than the maximum outer diameter of the top end of the output end head 364, and the 3 lower interfaces 322 are respectively communicated with the output end of the lower connector 32.

The vacuum filtration tank 7 is arranged between the output end of the lower joint 32 and the connecting pipeline 2, two ends of the vacuum filtration tank 7 are respectively communicated with the output end of the lower joint 32 and the connecting pipeline 2 to form a passage, a suction filtration interface 71 is arranged on the side wall of the vacuum filtration tank 7, and the suction filtration interface 71 is connected with the vacuum pump 8 through a rubber tube.

The input end of the upper joint 21 is provided with a buffer device 9, as shown in fig. 6, the buffer device comprises a buffer tube 91, an electromagnetic control valve 92, a buffer piston 93 and a bearing spring 94; the buffer tube 91 is of a hollow structure, the buffer tube 91 is vertically and fixedly arranged on the upper joint 31, the bottom end of the buffer tube 91 is communicated with the input end of the upper joint 31, the middle part of the buffer tube 91 is provided with a circulating liquid input port 95, the circulating liquid input port 95 is communicated with the connecting pipeline 2, and the top of the buffer tube 91 is provided with an L-shaped bearing support rod 96; the electromagnetic control valve 92 is arranged on the wall of the buffer tube between the bottom end of the buffer tube 91 and the circulating liquid inlet 95 and is used for controlling the input of fountain solution circulating liquid; the buffer piston 93 is disposed within an upper portion of the buffer tube 91, the buffer piston 93 having an outer diameter slightly smaller than an inner diameter of the buffer tube 91; one end of the bearing spring 94 is connected with the top of the buffer piston 93, and the other end of the bearing spring is connected with the L-shaped cross rod of the bearing support rod 96 to bear the buffer piston 93.

As shown in fig. 7, the filter element 361 includes two layers of U-shaped shells sleeved inside and outside, wherein the upper end of the inner shell 37 is communicated with the input end 363, the outer wall of the neck of the inner shell is provided with an external thread 371, the inner wall of the port of the outer shell 38 is correspondingly provided with an internal thread 381, and the outer shell 38 is in threaded connection with the inner shell 37 through the internal thread 381; an annular wall hanging skirt 372 is arranged at the upper part of the outer thread 371 of the inner shell, an annular wall hanging step 335 is arranged on the inner wall of the groove 333 corresponding to the wall hanging skirt, the inner shell 37 and the outer shell 38 are suspended and carried in the groove 333 through the wall hanging skirt 372, and a gap is formed between the bottom of the outer shell 38 and the concave bottom of the groove 333; the top cover 362 is of a groove-shaped structure with a downward concave surface, the inner wall of the concave surface of the top cover 362 is sleeved on the outer wall of the upper end port of the inner shell 37 and abuts against the edge of the wall hanging skirt 372, the outer wall of the concave surface of the top cover 362 is provided with an external thread 368, the corresponding position of the groove 333 is provided with an internal thread 336, and the top cover 362 is in threaded connection with the groove 333 through the external thread 368; the side walls of the inner shell 37 and the outer shell 38 are respectively provided with a plurality of filtering holes 39 to form a passage, the inner shell 37 is filled with filter cotton 373, the outer shell 38 is internally provided with a hollow fiber membrane filtering layer 382, and the filter cotton 373 is soaked in nano-silver solution and dried, so that the filter cotton soaked with fountain solution is prevented from contacting with air in the using or standing process to generate mildew or mould.

The use process of the filter device is as follows: in the process that the mixed solution flows out of the printer water tank 1 and is filtered by the filter tank 33, when more impurities are filtered after a period of time and the filter medium is blocked and the filter element needs to be replaced, firstly, the electromagnetic control valve 92 on the buffer tube 91 is closed, the circulating liquid is suspended, then, the filter tank 33 is rotated, the independent filter chamber 36 in use is separated from the upper joint 31 and the lower joint 32, and the next group of independent filter chambers 36 to be used are connected into the upper joint 31 and the lower joint 32, the separation process and the connection process mainly depend on the elastic reset function of the input end 363 and the output end 364 at the upper end and the lower end of the independent filter chamber 36, the input end 363 and the output end 364 compress and slide out along the inner wall of the horn-shaped joint by the horizontal acting force exerted by rotation, and when the input end 363 and the output end 364 of the next group rotate to the horn-shaped joint in sequence, the interfaces are pushed under the action of the spring to realize butt joint and complete switching, and the arc-shaped limiting through groove 313 on the upper joint 31 and the circular limiting groove 321 on the lower joint 32 are used for limiting the moving tracks of the input end 363 and the output end 364, so that the rotating process is more accurate and stable; after the switching is completed, opening the electromagnetic control valve 92 on the buffer tube 91, and opening the passage to recover the flow circulation of the mixed solution;

the buffer device 9 is used for continuously discharging the mixed solution in the circulation pipeline in a flowing manner when the buffer tube 9 is closed, gradually filling the inner wall space at the upper part of the buffer tube 91, jacking up the buffer piston 93, and when the buffer piston 93 is jacked to a certain height, the bearing spring 94 at the upper part of the buffer piston 93 realizes pressure conversion, applies downward resilience to the buffer piston 93, and further presses the mixed solution in the circulation pipeline to continuously flow until the electromagnetic control valve 92 is opened, so that the rotation switching of the filter tank 33 can be completed in the time period;

when the switched independent filter chamber 36 is moved out of the upper connector 31, most of the filtrate remains in the independent filter chamber 36, and the output end head 364 at the bottom of the independent filter chamber is still communicated with the lower connector 32, at this time, the vacuum suction pump 8 is started to perform vacuum suction filtration on the independent filter chamber 36, the filtrate enters the vacuum suction tank 7 through the output end head 364, the lower connector 322 on the lower connector 32 and the internal pipeline thereof and flows into the circulation pipeline at the lower stage, because the vacuum suction pump must depend on air circulation, the vacuum suction filtration process only acts on the empty independent filter chamber, no influence is generated on the independent filter chamber in use, and after the suction filtration is completed, the vacuum suction pump 8 is closed;

the filter layer inside the independent filter chamber 36 after the switching is completed should be replaced, the top cover 362 is unscrewed at first, the limitation of the top cover 362 on the filter element 361 is removed, then the filter element 361 is drawn out, the filter cotton filter layer 373 in the inner shell 37 is taken out, then the outer shell 38 is unscrewed, the hollow fiber membrane filter layer 382 in the outer shell 38 is taken out, then a new hollow fiber membrane filter layer is placed, the outer shell 38 with the filter layer replaced is screwed into the outer wall of the inner shell 37, and finally a new filter cotton filter layer is placed in the inner shell 37, so that the replacement of the filter element 361 is completed; inserting the replaced filter element 361 into the original filter tank groove 333, installing and screwing the top cover 362, and fixing the filter element 361, thereby completing the resetting of the independent filter chamber 36 until the next switching use;

in the design of the inner shell 37 and the outer shell 38, firstly, the side walls of the inner shell 37 and the outer shell 38 are both provided with a plurality of filtering holes 39, and the bottoms of the filtering holes are closed (U-shaped tube structure) so as to ensure that filtering liquid is only filtered out from the side walls of the shell and cannot be gathered at the bottom of the shell, so that the filter element is more uniform in use, and the service life and the filtering efficiency are higher; and then the filter element 361 is suspended in the groove 333 of the filter tank 33, so that a drainage space and a channel are formed between the filter hole 39 of the filter element 361 and the drainage hole 334 at the bottom of the groove 333, and the filtrate flows smoothly.

The fountain solution circulating system adopts the design of the rotary filtering tank and the auxiliary devices thereof, realizes the rapid switching of the filtering medium, does not influence the recycling of the mixed solution, and has excellent practical value; the invention carries out water liquid supplement and cooling mixing treatment on the fountain solution in the circulating process, and effectively improves the reusability and the use efficiency of the fountain solution.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and should not be taken as limiting the invention, so that any modifications, equivalents, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A fountain solution filtering treatment device which is connected with a water tank of a printing machine through a connecting pipeline to form a fountain solution circulating pipeline for the printing machine, it is characterized in that the filtering treatment device comprises an upper joint, a lower joint and a filtering tank, the upper joint and the lower joint are respectively and correspondingly fixed on the side wall of the printing machine water tank through a bracket, the input end of the upper joint and the output end of the lower joint are respectively connected with a connecting pipeline in the circulating pipeline in sequence, the center of the lower joint is vertically provided with a vertical shaft, the center of the filter tank is sleeved on the vertical shaft and can rotate by taking the vertical shaft as an axis, 3 groups of identical independent filter chambers are symmetrically arranged on the filter tank along the axis, and the top input end and the bottom output end of the 3 groups of independent filter chambers can be respectively in butt joint communication with the upper joint and the lower joint through rotation to form a passage; the filter tank is a cylindrical component, a through hole is formed in the center of the filter tank, and a plurality of ball bearings are arranged in the through hole; the vertical shaft penetrates through the through hole and the ball bearings inside the through hole to form interference connection with the filter tank, so that the filter tank has the capability of rotating by taking the vertical shaft as an axis; 3 identical vertically downward grooves are symmetrically formed in the top surface of the filter tank along the outer edge of the through hole and used for placing 3 groups of independent filter chambers, and a liquid discharge hole is formed in the bottom of each groove; independent filter chamber includes filter core, top cap, input end and output end, the filter core sets up in the recess, top cap detachably sets up the upper portion of recess will the filter core butt is fixed in the recess, the input end sets up on the top cap, the bottom of input end is passed the top cap stretches into in the filter core, the top of input end with the top connection intercommunication, the output end sets up the lower part of outage, the bottom of output end is passed the outage stretches into in the recess, the bottom of output end is provided with soft sealing head, be used for with the sealed jam in space between outage and the output end, the top of output end with the lower clutch intercommunication.

2. The fountain solution filtering device according to claim 1, wherein the top end of the input end is umbrella-shaped, a lift-up spring is sleeved between the top end of the input end and the top cover, and two ends of the lift-up spring are fixedly connected with the input end and the top cover respectively, so that the input end has elastic resetting capability from top to bottom; the top connection bottom corresponds to the upper interface that a horn mouth shape was seted up on the top of input end, upper interface is located on the rotatory orbit of input end, be provided with soft sealing ring on the upper interface inner wall, upper interface both sides are followed the rotatory orbit of input end has seted up the spacing logical groove of arc, the width that the spacing logical groove of arc slightly is greater than the maximum external diameter on input end top.

3. The fountain solution filtering device according to claim 2, wherein the top end of the output end is of an umbrella-shaped structure, a downward pressing spring is sleeved between the top end of the output end and the bottom surface of the filter tank, and two ends of the downward pressing spring are fixedly connected with the output end and the bottom surface of the filter tank respectively, so that the output end has an up-and-down elastic resetting capability; the lower clutch upper surface with the vertical scroll has been seted up as the center ring shape spacing recess, ring shape spacing recess with the rotatory orbit coincidence of output end, ring shape spacing recess is last to correspond to the lower interface of 3 the same horn mouth shapes is seted up to the top symmetry of output end, 3 individual lower interface respectively with the relative position coincidence of the output end of 3 independent filter chambers of group, and wherein have 1 lower interface with the upper interface coincides on vertical position, be provided with soft sealing ring on the lower interface inner wall, ring shape spacing recess's width slightly is greater than the maximum external diameter on output end top, 3 individual lower interface respectively with the output intercommunication of lower clutch.

4. The fountain solution filtering device according to claim 3, wherein a vacuum filtration tank is disposed between the lower joint output end and the connecting pipeline, two ends of the vacuum filtration tank are respectively communicated with the lower joint output end and the connecting pipeline to form a passage, and a suction filtration port is disposed on a side wall of the vacuum filtration tank and connected with the vacuum pump through a rubber tube.

5. The fountain solution filtration treatment apparatus of claim 1, wherein the input end of the upper joint is provided with a buffer device comprising a buffer tube, an electromagnetic control valve, a buffer piston and a load-bearing spring; the buffer tube is of a hollow structure, the buffer tube is vertically and fixedly arranged on the upper joint, the bottom end of the buffer tube is communicated with the input end of the upper joint, the middle part of the buffer tube is provided with a circulating liquid input port, the circulating liquid input port is communicated with the connecting pipeline, and the top of the buffer tube is provided with an L-shaped bearing support rod; the electromagnetic control valve is arranged on the wall of the buffer tube between the bottom end of the buffer tube and the circulating liquid inlet and is used for controlling the input of the fountain solution circulating liquid; the buffer piston is arranged in the upper part of the buffer tube, and the outer diameter of the buffer piston is slightly smaller than the inner diameter of the buffer tube; one end of the bearing spring is connected with the top of the buffer piston, and the other end of the bearing spring is connected with the L-shaped cross rod of the bearing support rod to bear the buffer piston.

6. The fountain solution filtration treatment apparatus of claim 1, wherein the filter element comprises two U-shaped shells sleeved inside and outside, wherein the upper end of the inner shell is communicated with the input end, the outer wall of the neck of the inner shell is provided with external threads, the inner wall of the port of the outer shell is correspondingly provided with internal threads, and the outer shell is in threaded connection with the inner shell through the internal threads; an annular wall-hanging skirt edge is arranged at the upper part of the external thread of the inner shell, an annular wall-hanging step is arranged on the inner wall of the groove corresponding to the wall-hanging skirt edge, the inner shell and the outer shell are suspended and carried in the groove through the wall-hanging skirt edge, and a gap is formed between the bottom of the outer shell and the concave bottom of the groove; the top cover is of a groove-shaped structure with a downward concave surface, the inner wall of the concave surface of the top cover is sleeved on the outer wall of the upper end port of the inner shell and abuts against the wall hanging skirt edge, external threads are arranged on the outer wall of the concave surface of the top cover, internal threads are arranged at the corresponding position of the groove, and the top cover is in threaded connection with the groove through the external threads; the filter comprises an inner shell and an outer shell, wherein the inner shell is internally provided with a hollow fiber membrane filter layer, the inner shell is internally provided with a plurality of filter holes, the inner shell is internally provided with a passage, and the filter cotton is soaked and dried by a nano silver solution.