Printing ink filtering equipment

Abstract

The invention relates to printing ink filtering equipment which comprises a rack serving as a mounting base; the first ink box is arranged on the rack and used for storing ink to be filtered; the vibrating screen is arranged on the rack and used for vibrating and filtering the printing ink; the vacuumizing device is arranged on the rack and is used for sealing and vacuumizing the vibrating space of the vibrating screen; the second printing ink box is arranged on the rack and is used for storing the filtered printing ink; and the conveying system is arranged on the rack and used for conveying the printing ink. The to-be-filtered ink passes through the vibrating screen to be filtered in a vibrating mode, meanwhile, the vibrating space of the vibrating screen is vacuumized after being sealed through the vacuumizing device, so that the filtering speed of the ink passing through the vibrating screen is high, air blended in the ink is little, follow-up treatment is high, and then the overall ink production efficiency is high.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ink filtering equipment, and particularly relates to an ink filtering equipment. BACKGROUND

[0002] The preparation process of ink includes preparation of corresponding components of ink additives and base ink, dissolution of the additives into the base ink and uniform stirring, and then filtering of the mixed ink, so that the final product ink can be obtained.

[0003] The traditional filtering method is to filter the ink through a filter screen. However, the particles of the precipitates in the ink are small, so the mesh of the filter screen needs to be set to be fine, and thus the filtering speed of the ink is slow, which seriously affects the production efficiency of the ink. Meanwhile, when the ink is filtered, only a part of the filter screen is used to filter the ink, which easily causes the particles to accumulate in the local part of the filter screen and block the local mesh of the filter screen in a short time, thereby affecting the service life of the filter screen. SUMMARY

[0004] In order to solve the problems that the traditional direct filtering of the ink through the filter screen is low in filtering efficiency and short in service life of the filter screen, the present application provides an ink filtering equipment.

[0005] The ink filtering equipment provided by the present application adopts the following technical scheme: An ink filtering equipment, comprising: a rack serving as a mounting base; a first ink tank arranged on the rack and used for storing ink to be filtered; a vibrating screen arranged on the rack and used for vibrating filtering of the ink; a vacuum pumping device arranged on the rack and used for sealing and vacuumizing a vibrating space of the vibrating screen; a second ink tank arranged on the rack and used for storing filtered ink; a conveying system arranged on the rack and used for conveying the ink in the first ink tank to the vibrating screen and conveying the screened ink to the second ink tank.

[0006] Through the technical scheme, the ink to be filtered is poured into the first ink tank, and then is conveyed to the vibrating screen through the conveying system, and the ink is filtered through the vibrating screen, so that the overall filtering speed is high, and the impurities are not easy to be stuck in the filter holes of the filter screen during filtering, and under the vibration of the vibrating screen, the ink is distributed on the whole filter screen of the vibrating screen for filtering, so that the impurity particles are not easy to be accumulated in the local part of the vibrating screen, and at the same time, after the vibration space of the vibrating screen is closed and vacuumized through the vacuumizing device, the air dissolved in the ink due to vibration is changed into bubbles and separated from the ink during the filtering of the vibrating screen, so that the air content in the filtered ink is small, and the time for the filtered ink to discharge the internal air through standing is short, and the production efficiency of the ink is effectively improved.

[0007] Optionally, the vacuumizing device comprises: a cover provided on the frame and provided with an exhaust hole; a first vacuum pump provided on the cover and connected with the exhaust hole; a sealing pipe made of flexible material and used for sealingly connecting the cover and the vibrating disc of the vibrating screen.

[0008] Optionally, the vibrating screen comprises a vibrating disc and a power assembly, the vibrating disc is provided with a screen mesh for filtering the ink, the vibrating disc is uniformly provided at the bottom with a plurality of supporting springs connected with the frame, the vibrating disc is sealingly connected with the sealing pipe, the bottom of the vibrating disc is funnel-shaped, and the discharging end of the vibrating disc is located at the end of the funnel-shaped bottom.

[0009] Optionally, the conveying system comprises: a liquid inlet pipe provided on the cover, one end of the liquid inlet pipe is connected with the first ink tank through a pipeline, the other end of the liquid inlet pipe penetrates through the sealing pipe, the inner wall of the one end of the liquid inlet pipe penetrating through the sealing pipe is provided with a plurality of guide plates along the length direction at intervals, the guide plates are inclined towards the vibrating disc, and the guide plates are connected with each other in a head-to-tail mode; a liquid outlet pipe made of a hose, one end of the liquid outlet pipe is provided at the end of the funnel-shaped bottom of the vibrating disc, and the other end of the liquid outlet pipe is connected with the second ink tank.

[0010] Optionally, the one end of the liquid inlet pipe penetrating through the sealing pipe is provided with a plurality of supporting rings on the side wall, the supporting rings and the liquid inlet pipe are connected through damping springs, and the supporting rings are used for supporting the sealing pipe.

[0011] Optionally, the vibrating disc is provided with a cover body, the cover body is provided with a connecting pipe, an end surface of the connecting pipe is provided with an annular connecting groove, one end of the sealing pipe connected with the vibrating disc is provided with a sealing ring, one end of the sealing pipe provided with the sealing ring is slidingly installed in the connecting groove, a groove bottom of the connecting groove is provided with a connecting hole, the connecting hole is in communication with the inside of the connecting pipe, and the sealing ring and one end of the sealing pipe can slide to close the connecting hole.

[0012] Optionally, the connecting hole is provided with a plurality of connecting holes, one end of the connecting hole connected with the connecting groove is linear, the end surface of the sealing ring and the sealing pipe is correspondingly provided with a plurality of sealing columns, the sealing columns are correspondingly and fittingly inserted into one end of the connecting hole in a linear manner, and the length of the sealing column is less than the length of one end of the connecting hole in a linear manner.

[0013] Optionally, the second ink tank top wall is provided with a second vacuum pump, and the second vacuum pump is used for vacuumizing the second ink tank.

[0014] Optionally, the rack is provided with an adjusting pipe, a piston is sealingly and slidingly installed in the adjusting pipe, two ends of the adjusting pipe are connected with the upper end of the sealing pipe and the second ink tank through pipes, both ends of the piston are provided with piston rods, the two piston rods are sealingly and slidingly passed through two ends of the adjusting pipe, the rack is provided with a start switch and a stop switch, the start switch and the stop switch are used for starting and stopping the second vacuum pump respectively, and the rack is provided with a damping mechanism for applying resistance to the movement of the piston rod.

[0015] Optionally, the liquid inlet pipe and the flow guide plate are made of heat-conducting materials, and the liquid inlet end of the liquid inlet pipe is provided with a refrigeration mechanism.

[0016] In summary, the present application pours the ink to be filtered into the first ink tank, and then conveys it to the vibrating screen through the conveying system, and filters the ink through the vibrating screen. The overall filtering speed is relatively fast, and the impurities are not easy to be stuck in the filter holes of the filter screen during filtering. At the same time, under the vibration of the vibrating screen, the ink is distributed on the entire filter screen of the vibrating screen for filtering, and the impurity particles are not easy to accumulate locally in the vibrating screen. At the same time, after the vibrating space of the vibrating screen is closed by the vacuumizing device and then vacuumized, the air dissolved in the ink due to vibration during the filtering of the vibrating screen will become bubbles and be separated from the ink, so that the air content in the filtered ink is relatively small, and the time for the filtered ink to discharge the internal air through static is relatively short, thereby effectively improving the production efficiency of the ink. At the same time, the end of the sealing pipe is inserted into the connecting groove, the sealing and fixed connection between the sealing pipe and the connecting groove is realized through the negative pressure in the vibrating disc, and then the connection between the sealing pipe and the connecting pipe is relatively flexible, and is not easy to be damaged due to the vibration of the vibrating disc. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the present application.

[0018] Figure 2 is a front view of the vibrating screen of the present application.

[0019] Figure 3 is a perspective view of the present application, showing the internal structure of the sealing tube.

[0020] Figure 4 is a perspective view of the present application. Figure 3 is an enlarged view of part A in the figure.

[0021] Figure 5 is a cross-sectional view of the sealing tube of the present application.

[0022] Figure 6 is a cross-sectional view of the sealing tube of the present application. Figure 5 is an enlarged view of part B in the figure.

[0023] Figure 7 is a cross-sectional view of the second ink tank of the present application.

[0024] Figure 8 is a cross-sectional view of the regulating tube of the present application.

[0025] Those skilled in the art will understand that the elements in the drawings are shown for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions and / or relative positioning of some of the elements in the drawings are exaggerated relative to other elements to help to improve understanding of the present embodiments.

[0026] Reference signs: 1, frame; 2, vibrating screen; 21, vibrating disc; 22, power assembly; 23, supporting spring; 24, support; 25, connecting plate; 26, cover; 27, connecting tube; 271, connecting groove; 272, connecting hole; 3, vacuumizing device; 31, cover; 32, first vacuum pump; 33, sealing tube; 331, sealing ring; 332, sealing column; 4, transportation system; 41, liquid inlet pipe; 411, second connecting sleeve; 412, flow guide plate; 42, liquid outlet pipe; 43, supporting ring; 431, first connecting sleeve; 44, damping spring; 5, second ink tank; 51, second vacuum pump; 52, partition; 53, air inlet; 54, air inlet pipe; 55, end cover; 56, air cylinder; 6, one-way valve; 7, regulating tube; 71, piston; 72, piston rod; 73, start switch; 74, stop switch; 8, refrigeration mechanism; 81, cooling pipe; 9, damping mechanism; 91, damping wheel; 92, embedded groove. DETAILED DESCRIPTION

[0027] The following description is made in connection with the accompanying drawings. Figures 1-8 The present application is further described in detail.

[0028] The embodiment of the present application discloses an ink filtering device, referring to Figure 1 and Figure 2 comprising a rack 1 as a mounting base, a first ink tank fixedly mounted on the rack 1, a second ink tank 5 fixedly mounted on the rack 1 and a vibrating screen 2 fixedly mounted on the rack 1.

[0029] Referring to Figure 1 and Figure 2 The first ink tank is used for storing ink to be filtered, the second ink tank 5 is used for storing ink that has been filtered, and the vibrating screen 2 is used for filtering the ink. The rack 1 is further provided with a conveying system 4, which is used for conveying the ink in the first ink tank to the vibrating screen 2 and conveying the ink that has been filtered in the vibrating screen 2 to the second ink tank 5 for storage.

[0030] Referring to Figure 1 and Figure 2 During the filtering of the ink by the vibrating screen 2, air is dissolved into the ink while the ink is reciprocatingly vibrated on the screen of the vibrating screen 2, which causes white spots, voids or spots to appear in the printing due to the breakage of air bubbles in the ink during the subsequent printing, and thus the overall printing quality is reduced.

[0031] Therefore, after the ink is filtered by the vibrating screen 2, a long time is needed for the air bubbles in the ink to be precipitated, or a defoaming agent is added to accelerate the precipitation of the air bubbles in the ink. However, the long time of precipitation causes the particles dissolved in the ink to be precipitated, and the production efficiency is reduced, and the use of the defoaming agent not only increases the production cost of the ink, but also seriously reduces the surface tension of the ink, so that the defoaming agent improves the precipitation speed of the air bubbles in the ink, but causes circular marks in the printing, which affects the printing quality.

[0032] Referring to Figure 1 and Figure 2 Therefore, in order to solve the problem that air is dissolved into the ink when the ink is filtered by the filtering screen and it is difficult to quickly precipitate the air, the embodiment is provided with a vacuumizing device 3 on the rack 1, which is used for vacuumizing the space of the vibrating screen 2 of the vibrating screen 2 when the vibrating screen 2 vibrates to filter the ink. The low pressure causes the solubility of air in the liquid to be reduced, so that the amount of air dissolved into the ink is small when the vibrating screen 2 vibrates to filter the ink, and the standing time required for the subsequent standing of the ink to precipitate the air is reduced.

[0033] Referring to Figure 1 and Figure 2The vacuumizing device 3 comprises a circular cover 31 fixedly installed on the frame 1, a first vacuum pump 32 fixedly installed on the frame 1, and a sealing pipe 33 arranged on the cover 31. The cover 31 is horizontal. The sealing pipe 33 is made of flexible material, one end of which is fixedly connected with the cover 31 coaxially, and the other end of which is vertically downward. The cover 31 is provided with an exhaust hole penetrating through the cover 31, the exhaust hole is communicated with the sealing pipe 33, and the exhaust hole is connected with the first vacuum pump 32 through a pipeline.

[0034] With reference to Figure 1 and Figure 2 , the conveying system 4 comprises an inlet pipe 41 made of hard heat-conducting material, the inlet pipe 41 is coaxially arranged in the sealing pipe 33, and the upper end of the inlet pipe 41 is coaxially penetrated through the cover 31 and is sealingly welded with the cover 31.

[0035] With reference to Figure 1 and Figure 2 , the vibrating screen 2 comprises a circular vibrating disc 21 and a power assembly 22. The bottom wall of the vibrating disc 21 is funnel-shaped, a screen mesh is fixedly installed in the vibrating disc 21, and the bottom wall of the vibrating disc 21 is provided with a liquid outlet at the bottom end, and a one-way valve 6 is fixedly installed at the liquid outlet. The vibrating disc 21 is provided with a support 24, the support 24 is annular, a plurality of connecting plates 25 are fixedly installed on the support 24 in circumferential direction, the vibrating disc 21 is coaxially fixedly installed on the support 24 through the connecting plates 25, a plurality of supporting springs 23 are fixedly installed on the support 24 in circumferential direction around the axis of the support 24, one end of each supporting spring 23 is fixedly connected with the frame 1, and the support 24 is supported by the supporting springs 23. The power assembly 22 is a power assembly 22 of a conventional circular vibrating screen 2, which is a prior art, and is used for driving the support 24 and the vibrating disc 21 to vibrate.

[0036] With reference to Figure 1 and Figure 2 , the one-way valve 6 is fixedly connected with an outlet pipe 42, the outlet pipe 42 is a hose, and one end of the outlet pipe 42 is penetrated through the support 24 and is connected with the second ink tank 5 through a hard pipeline. The outlet pipe 42 is supported by the hard pipeline, so that the outlet pipe 42 is not easily shaken to touch the support 24 when the vibrating disc 21 vibrates.

[0037] With reference to Figure 1 and Figure 2 , the vibrating disc 21 has an upper opening, and a cover body 26 is fixedly installed on the vibrating disc 21, the cover body 26 closes the upper opening of the vibrating disc 21, and the cover body 26 is coaxially and integrally provided with a connecting pipe 27, the connecting pipe 27 is vertical.

[0038] With reference to Figure 5 and Figure 6The upper end surface of the connecting pipe 27 is coaxially provided with a ring-shaped connecting groove 271, and the lower end outer sidewall of the sealing pipe 33 is coaxially and integrally provided with a sealing ring 331, and the end surface of the sealing ring 331 is flush with the lower end surface of the sealing pipe 33. The lower end of the sealing pipe 33 and the sealing ring 331 are slidingly installed in the connecting groove 271.

[0039] Referring to Figure 5 and Figure 6 The groove bottom of the connecting groove 271 is planar, and the groove bottom of the connecting groove 271 is circumferentially spaced apart about its axis and provided with a plurality of connecting holes 272, the connecting holes 272 are in communication with the connecting pipe 27, and the axis of the end of the connecting hole 272 connected with the connecting groove 271 is parallel to the axis of the connecting pipe 27. The lower end surface of the sealing pipe 33 is circumferentially spaced apart about its axis and integrally provided with a plurality of connecting columns, the connecting columns are slidingly inserted into the connecting holes 272 one by one, and the length of the connecting columns is less than the length of the end of the connecting hole 272 connected with the connecting groove 271. The lower end of the sealing pipe 33 and the sealing ring 331 can be slidingly fitted to the groove bottom of the connecting groove 271 and simultaneously close the connecting holes 272.

[0040] Referring to Figure 3 and Figure 4 The sidewall of the liquid inlet pipe 41 is coaxially provided with a plurality of support rings 43, the inner circle of the support ring 43 is circumferentially spaced apart and provided with a plurality of first connecting sleeves 431, the first connecting sleeves 431 are inserted with damping springs 44, the sidewall of the liquid inlet pipe 41 is fixedly welded with a plurality of second connecting sleeves 411 corresponding to the first connecting sleeves 431, one end of the damping spring 44 is inserted into the second connecting sleeve 411, and the support ring 43 is installed on the outer sidewall of the liquid inlet pipe 41 through the damping spring 44, and the support spring 23 is fitted to the inner wall of the sealing pipe 33.

[0041] When the first vacuum pump 32 is started, the first vacuum pump 32 evacuates the vibration disc 21 through the sealing pipe 33, under the action of the external atmospheric pressure, one end of the sealing pipe 33 and the sealing ring 331 slidingly fit to the groove bottom of the connecting groove 271 to close the connecting groove 271 and the connecting hole 272, and the connecting column inserted into the connecting hole 272 further closes the connecting hole 272, at this time, the connecting pipe 27 and the sealing pipe 33 are in a connected state.

[0042] Because the sealing pipe 33 needs to accommodate the liquid inlet pipe 41, the size of the sealing pipe 33 is large, and the traditional metal hoop method is easy to be damaged in the process of vibrating the vibration disc 21, and because the sealing pipe 33 is made of flexible material, it is not easy to be damaged due to vibration.

[0043] Since the sealing tube 33 is made of flexible material, the sealing tube 33 can vibrate along with the vibration plate 21 when the vibration plate 21 vibrates, and when the sealing tube 33 is connected with the connecting tube 27, the lower end of the sealing tube 33 is curved to provide the displacement allowance required for the sealing tube 33 to shake along with the vibration plate 21, so that the connection between the sealing tube 33 and the connecting tube 27 is not easily disconnected.

[0044] Through the cooperation between the connecting column and the connecting hole 272, the sealing between the sealing tube 33 and the connecting tube 27 is further improved, so that the sealing tube 33 and the connecting tube 27 are not easily separated, and at the same time, the flexible material made of the sealing tube 33 is not easily twisted during the vibration of the sealing tube 33 along with the connecting tube 27, so that the connection between the sealing tube 33 and the connecting tube 27 is more stable, and the sealing tube 33 is not easily damaged due to twisting.

[0045] When the first vacuum pump 32 pumps the vibration plate 21 through the sealing tube 33, the sealing tube 33 is supported by the support ring 43, so that the sealing tube 33 will not be attached to the closed under the action of the external atmospheric pressure, and the first vacuum pump 32 can always be in normal working state, and the pressure in the vibration plate 21 can always be maintained at a specified pressure value.

[0046] Since the support ring 43 is connected with the liquid inlet pipe 41 through the damping spring 44, the shaking of the sealing tube 33 supported by the support ring 43 will be slowed down along the direction of the sealing tube 33 to the cover 31, until it is transmitted to the cover 31, or the vibration of the sealing tube 33 has negligible effect on the connection between the sealing tube 33 and the cover 31.

[0047] Referring to Figure 5 and Figure 6 , the inner wall of the liquid inlet pipe 41 is provided with a plurality of guide plates 412 spaced along the length direction, the guide plates 412 are inclined towards the vibration plate 21, and the guide plates 412 are arranged in staggered and butt joint manner. The lower side of the lowermost guide plate 412 corresponds to the middle part of the screen of the vibration plate 21.

[0048] The first ink tank is provided with a water pump, the upper end of the liquid inlet pipe 41 is connected with the water pump of the first ink tank through a pipeline, and the ink in the first ink tank is supplied to the upper end of the liquid inlet pipe 41 through the water pump along the pipeline.

[0049] Referring to Figure 5 and Figure 6The ink outlet of the liquid inlet connected with the pipeline of the liquid inlet pipe 41 is in butt joint with the ink inlet end of the flow guide plate 412 located at the uppermost end, and the ink flowing out of the ink inlet connected with the pipeline of the liquid inlet pipe 41 flows along the flow guide plates 412 in turn and then falls on the screen of the vibrating disc 21 to be filtered. The guidance of the flow guide plates 412 makes the ink more smooth in the conveying process, and air is more difficult to be mixed into the ink in the conveying process. At the same time, the flow guide plates 412 widen the water flow width of the ink flowing to the screen of the vibrating disc 21, and slow down the local excessive accumulation of particles on the screen of the vibrating disc 21 in the process of filtering the ink.

[0050] The vacuum pump also helps the ink flow from the first ink tank to the upper end of the liquid inlet pipe 41, reduces the conveying pressure requirement of the water pump, and in turn reduces the energy consumption of the water pump.

[0051] Referring to Figure 1 The upper end of the liquid inlet pipe 41 is provided with a refrigeration mechanism 8, and the refrigeration mechanism 8 includes a cooling pipe 81 arranged around the upper end of the liquid inlet pipe 41. The cooling pipe 81 is connected with a refrigeration machine, and the upper end of the liquid inlet pipe 41 is cooled through the cooling pipe 81, thereby reducing the overall temperature of the liquid inlet pipe 41, and in turn reducing the temperature of the ink flowing along the liquid inlet pipe 41 and the flow guide plates 412 into the vibrating disc 21, which can effectively prevent the ink from volatilizing and boiling in a low-pressure environment.

[0052] Referring to Figure 7 The top wall of the second ink tank 5 is fixedly provided with a second vacuum pump 51, and a horizontal partition plate 52 is fixedly arranged in the second ink tank 5. The partition plate 52 divides the second ink tank 5 into upper and lower parts, and the partition plate 52 is provided with air holes. The second vacuum pump 51 is connected with the upper part of the second ink tank 5 through a pipeline.

[0053] Referring to Figure 7 The partition plate 52 blocks the ink in the second ink tank 5 from directly entering the second vacuum pump 51 to pollute and damage the second vacuum pump 51.

[0054] Referring to Figure 2 and Figure 7 The one-way valve 6 is used to block the ink from flowing out of the bottom of the vibrating disc 21. When the weight of the ink at the bottom of the vibrating disc 21 exceeds the bearing capacity of the one-way valve 6 and the external atmospheric pressure, the ink will flow through the one-way valve 6 along the liquid outlet pipe 42 into the second ink tank 5. The second vacuum pump 51 is used to vacuumize the second ink tank 5, so that the air pressure in the second ink tank 5 is less than the air pressure in the vibrating disc 21, thereby helping the ink in the vibrating disc 21 to flow into the second ink tank 5.

[0055] At the same time, the low-pressure state in the second ink tank 5 also helps the air bubbles in the ink in the second ink tank 5 to be precipitated.

[0056] With reference to Figure 7 and Figure 8 , the rack 1 is fixedly installed with an adjusting pipe 7, both ends of the adjusting pipe 7 are closed, a piston 71 is slidingly installed in the adjusting pipe 7, and pipes are connected to both ends of the adjusting pipe 7. One end of the pipe at one end of the adjusting pipe 7 extends to the cover 31, the pipe is fixedly connected with the cover 31, and the end thereof extends into the upper end of the sealing pipe 33.

[0057] With reference to Figure 7 and Figure 8 , the pipe at the other end of the adjusting pipe 7 extends to the top wall of the second ink tank 5 and communicates with the upper inner cavity of the second ink tank 5. Both ends of the piston 71 are coaxially and fixedly installed with a piston rod 72, one end of the piston rod 72 sealingly and slidingly penetrates the end face of the adjusting pipe 7 and is located outside. The rack 1 is fixedly installed with a start switch 73 and a stop switch 74 at both ends of the adjusting pipe 7, respectively, and the piston 71 can be slidingly pressed down the start switch 73 or the stop switch 74 through the piston rod 72. The start switch 73 and the stop switch 74 are used for starting and stopping the second vacuum pump 51, respectively.

[0058] With reference to Figure 7 and Figure 8 , the rack 1 is provided with a damping mechanism 9, the damping mechanism 9 includes two rubber damping wheels 91 rotatably installed on the rack 1, the side walls of the damping wheels 91 are each provided with an annular embedding groove 92, and one of the piston rods 72 passes between the two damping wheels 91 and is embedded in the embedding groove 92.

[0059] The top wall of the second ink tank 5 is provided with an air inlet 53, and the top wall of the second ink tank 5 is fixedly installed with an air inlet pipe 54 connected with the air inlet 53. The air inlet end of the air inlet pipe 54 is slidingly installed with an end cover 55, the inner wall of the air inlet pipe 54 is in a stepped shape, and the end cover 55 can be slidingly closed to abut against the stepped surface of the inner wall of the air inlet pipe 54 to close the air inlet end of the air inlet pipe 54. The top wall of the second ink tank 5 is fixedly installed with a gas cylinder 56, and the piston rod 72 of the gas cylinder 56 is fixedly connected with the end cover 55.

[0060] When the first vacuum pump 32 is started, the air pressure in one end of the adjusting pipe 7 is reduced, the piston 71 slides under the push of the atmospheric pressure, and due to the resistance of the damping wheel 91, the piston 71 abuts against the start switch 73 after sliding for a period of time, and the second vacuum pump 51 is started.

[0061] With reference to Figure 7 and Figure 8When the second vacuum pump 51 is started, the start switch 73 synchronously starts the air cylinder 56, and the piston rod 72 of the air cylinder 56 extends to push the end cover 55 to close the air inlet pipe 54 of the air inlet pipe 54, so that the second ink tank 5 remains in a closed state. After the second vacuum pump 51 is started, the air pressure in the second ink tank 5 is lower than the air pressure in the vibration disc 21, so the one-way valve 6 is opened, and the ink in the vibration disc 21 flows out along the liquid outlet pipe 42 into the second ink tank 5. Because the air pressure in the one end of the adjusting pipe 7 connected with the second ink tank 5 is lower than the air pressure in the one end of the connecting pipe 27 connected with the liquid inlet pipe 41, the piston 71 starts to reset, and when the piston 71 is completely reset, the other piston rod 72 abuts against the stop switch 74, and the second vacuum pump 51 stops.

[0062] When the second vacuum pump 51 is stopped, the stop switch 74 synchronously starts the air cylinder 56 to retract the piston rod 72 of the air cylinder 56, and then drives the end cover 55 to open, so that the external air enters the second ink tank 5 from the air inlet pipe 54.

[0063] Because the ink is easy to precipitate in a low-pressure environment for a long time, and through the above-mentioned mode, the pressure in the second ink tank 5 is intermittently reduced, which facilitates the ink to precipitate air in a low-pressure state, and also makes the ink not in a low-pressure state for a long time to cause precipitation.

[0064] The above are preferred embodiments of the present application, and are not intended to limit the protection scope of the present application, so: any equivalent changes made on the structure, shape, principle of the present application should be covered in the protection scope of the present application.

Claims

1. An ink filtering device, characterized in that: include: A frame (1) serving as a mounting base; A first ink box, provided on the frame (1), for storing ink to be filtered; A vibrating screen (2), provided on the frame (1), for vibrating and filtering the ink; A vacuuming device (3) is provided on the frame (1) and is used to seal and vacuum the vibration space of the vibrating screen (2); A second ink box (5) is provided on the frame (1) and is used to store filtered ink; The transport system (4) is provided on the frame (1) and is used for transporting the ink in the first ink box to the vibrating screen (2), and is also used for transporting the screened ink to the second ink box (5).

2. The ink filtering device according to claim 1, characterized in that: The vacuum pumping device (3) comprises: A sealing cover (31) is provided on the frame (1) and is provided with an exhaust hole; A first vacuum pump (32) is provided on the sealing cover (31) and connected to the exhaust hole; The sealing tube (33) is made of a flexible material and is used to seal the connection between the sealing cover (31) and the vibration plate (21) of the vibration screen (2).

3. The ink filtering device according to claim 2, characterized in that: The vibrating screen (2) comprises a vibrating plate (21) and a power assembly (22). A screen is installed in the vibrating plate (21), and the screen is used to filter ink. A plurality of supporting springs (23) are evenly distributed on the bottom of the vibrating plate (21). The supporting springs (23) are connected to the frame (1). The vibrating plate (21) is supported by the supporting springs (23). The vibrating plate (21) is sealed with a sealing tube (33). The bottom of the vibrating plate (21) is funnel-shaped, and the discharge end of the vibrating plate (21) is located at the end of the funnel-shaped bottom.

4. The ink filtering device according to claim 3, characterized in that: The transport system (4) comprises: A liquid inlet pipe (41) is provided on the cover (31), one end of which is connected to the first ink tank via a pipe, and the other end of which passes through the sealing pipe (33). The inner wall of the end of the liquid inlet pipe (41) passing through the sealing pipe (33) is provided with a plurality of guide plates (412) spaced apart along the length direction. The guide plates (412) are inclined toward the vibration plate (21), and the guide plates (412) are butted end to end with each other. The liquid outlet pipe (42) is a flexible pipe, one end of which is arranged at the end of the funnel-shaped bottom of the vibration plate (21), and the other end is connected to the second ink tank (5).

5. The ink filtering device according to claim 4, characterized in that: A plurality of support rings (43) are sleeved on the side wall of one end of the liquid inlet pipe (41) located in the sealing pipe (33). The support rings (43) are connected to the liquid inlet pipe (41) via a damping spring (44). The support rings (43) are used to support the sealing pipe (33).

6. The ink filtering device according to claim 3, characterized in that: The vibration disk (21) is provided with a cover body (26), the cover body (26) is provided with a connecting pipe (27), the end surface of the connecting pipe (27) is provided with an annular connecting groove (271), one end of the sealing pipe (33) connected to the vibration disk (21) is provided with a sealing ring (331), one end of the sealing pipe (33) provided with the sealing ring (331) is slidably mounted on the connecting groove (271), the bottom of the connecting groove (271) is provided with a connecting hole (272), the connecting hole (272) is communicated with the interior of the connecting pipe (27), and the sealing ring (331) and one end of the sealing pipe (33) can be slid to close the connecting hole (272).

7. The ink filtering device according to claim 6, characterized in that: The connecting holes (272) are provided with a plurality of them, and one end of the connecting hole (272) connected to the connecting groove (271) is in a straight line. The end surfaces of the sealing ring (331) and the sealing tube (33) are provided with a plurality of sealing columns (332) correspondingly. The sealing columns (332) are correspondingly inserted into the end of the connecting hole (272) in a straight line, and the length of the sealing columns (332) is less than the length of the end of the connecting hole (272) in a straight line.

8. The ink filtering device according to claim 1, characterized in that: A second vacuum pump (51) is provided on the top wall of the second ink box (5), and the second vacuum pump (51) is used to evacuate the second ink box (5).

9. The ink filtering device according to claim 8, characterized in that: The frame (1) is provided with a regulating tube (7), a piston (71) is sealed and slidably installed in the regulating tube (7), the two ends of the regulating tube (7) are respectively connected to the upper end of the sealing tube (33) and the second ink tank (5) through pipelines, and the two ends of the piston (71) are provided with piston rods (72), and the two piston rods (72) respectively pass through the two ends of the regulating tube (7) in a sealed manner. The frame (1) is provided with a start switch (73) and a stop switch (74), and the start switch (73) and the stop switch (74) are respectively used to start and stop the second vacuum pump (51). The frame (1) is provided with a damping mechanism (9) for applying resistance to the movement of the piston rod (72).

10. The ink filtering device according to claim 4, characterized in that: The liquid inlet pipe (41) and the guide plate (412) are both made of heat-conducting material, and a refrigeration mechanism (8) is provided at the liquid inlet end of the liquid inlet pipe (41).

Images