Ink-jet printing waste liquid circulating treatment equipment with multi-stage filtering and negative pressure recycling structure

Abstract

The invention relates to the technical field of ink-jet waste liquid recycling, in particular to ink-jet printing waste liquid circulating treatment equipment with a multi-stage filtering and negative pressure recycling structure, which comprises a recycling bin, a negative pressure device arranged at the top of the recycling bin, and a centrifugal disc, a transmission group and an oscillation mechanism which are arranged in the recycling bin. According to the ink-jet printing waste liquid circulating treatment equipment with the multi-stage filtering and negative pressure recycling structure, when a liquid guide pipe rotates, a primary filter screen synchronously abuts against a scraper blade to remove surface impurities, meanwhile, rod teeth are meshed with ring teeth to drive a rotating ring and a secondary filter screen to rotate at a high speed, and a two-stage filtering linkage structure of dynamic interception and centrifugal separation is formed; according to the design, large-particle blockage is avoided through primary filtering and self-cleaning, fine suspended matter separation is enhanced through centrifugal force, the waste liquid pretreatment effect is improved, and the follow-up treatment load is reduced.

Description

Technical Field

[0001] This invention relates to the field of inkjet waste liquid recycling technology, and more specifically, to an inkjet printing waste liquid recycling treatment device equipped with a multi-stage filtration and negative pressure recovery structure. Background Technology

[0002] Inkjet printing waste liquid treatment equipment uses a multi-stage filtration system to efficiently remove impurities and harmful substances from waste liquid. Combined with negative pressure vacuum technology, it can accurately recover residual ink, achieving waste liquid purification and resource recycling. The equipment integrates an intelligent control system, which can significantly reduce waste liquid emissions and help the printing industry achieve green production and cost control.

[0003] Patent application number CN202023025501.5 discloses a desulfurization waste liquid recycling treatment device, including a fixed plate with multiple casters at the bottom. A working plate is welded to the top of the fixed plate, and a crushing chamber is fixedly connected to one end of the working plate. A motor is installed on the top of the crushing chamber, and a rotating rod is installed at the output end of the motor. Blades are installed on the outer wall of the rotating rod. A liquid delivery pipe is installed inside the crushing chamber, and a cylinder is installed at the bottom of the crushing chamber. A connecting pipe is installed between the crushing chamber and the cylinder. A filter screen is driven by a collection cylinder. The collection cylinder cooperates with a locking block and a cover plate to facilitate the collection and treatment of waste in the waste liquid, thereby improving the working efficiency of the device.

[0004] However, existing inkjet printing waste liquid treatment devices generally suffer from low filtration efficiency and adsorption failure. Traditional filtration structures are mostly static single-stage interception, and the primary filter screen lacks a self-cleaning mechanism. Large particles of impurities easily clog the mesh, leading to a decrease in the influent flow rate. Moreover, centrifugal separation components are mostly driven by independent power and lack linkage with the primary filtration stage. In the adsorption stage, conventional activated carbon adsorption plates are fixedly installed. After long-term treatment, colloidal organic matter easily forms a dense agglomerate layer on the carbon layer surface, which reduces porosity, causes the adsorption capacity to decrease month by month, and results in a short service life.

[0005] In view of this, we propose an inkjet printing waste liquid recycling treatment equipment with multi-stage filtration and negative pressure recovery structure. Summary of the Invention

[0006] The purpose of this invention is to provide an inkjet printing waste liquid recycling treatment device with a multi-stage filtration and negative pressure recovery structure. Through the rotation of the liquid guide pipe and the rotating ring, a two-stage filtration linkage structure of dynamic interception and centrifugal separation is formed to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: The inkjet printing waste liquid recycling treatment equipment is equipped with a multi-stage filtration and negative pressure recovery structure, including a recovery chamber, a negative pressure device set on the top of the recovery chamber, and a centrifugal disc, transmission group and oscillation mechanism set inside the recovery chamber; The recycling bin includes a liquid guiding section, which includes a liquid guiding pipe with its bottom end extending into the waste liquid and a primary filter screen that is snapped into the bottom end of the liquid guiding pipe. The negative pressure device includes a motor, a reciprocating lead screw at its end, rod teeth sleeved at the bottom end of the reciprocating lead screw, and a rotary vacuum section sleeved on the outside of the reciprocating lead screw. This setting drives the reciprocating screw to rotate, causing the rotary vane vacuum section to create negative pressure in the recovery chamber. The waste liquid is then drawn in through the liquid guide pipe after being filtered by the primary filter screen. The centrifuge disc includes a rotating ring disposed on the outside of the liquid guide tube and ring teeth disposed on the top surface of the rotating ring. The top surface of the rotating ring is provided with several drainage grooves that communicate with the side wall, and secondary filter screens are snapped onto the outside of the drainage groove walls; This feature allows the meshing ring teeth to drive the rotating ring to rotate when the rod teeth rotate, thus performing secondary centrifugal filtration on the waste liquid flowing from the liquid guide tube; The oscillation mechanism includes a slider sleeved on the outside of the reciprocating lead screw, a protruding rod that moves with the slider, a frame set on the outside of the protruding rod, and an adsorption plate placed inside the frame. A guide groove is provided on the outer wall of the frame. The slider moves up and down with the rotation of the reciprocating lead screw, allowing the protruding rod to move along the guide groove. This setting drives the frame and adsorption plate to oscillate horizontally, preventing the carbon layer from caking.

[0008] In the technical solution of the present invention, the recovery bin further includes a fixed bin body, a lower partition plate and a liquid guide plate welded and fixed from top to bottom to the inner wall of the left end of the fixed bin body, a bent plate welded to the inner wall of the fixed bin body near the center, a liquid storage tank snapped and fixed to the bottom right side of the fixed bin body, and a drain valve snapped and fixed to the bottom wall of the liquid storage tank.

[0009] In the technical solution of the present invention, an upper partition is welded and fixed to the inner wall of the fixed chamber above the lower partition. An opening for the centrifugal disc to rotate is provided at the center of the lower partition. An annular baffle is integrally formed on the bottom surface of the lower partition outside the opening. The top surface of the liquid guide plate is inclined from left to right. Two vertically connected liquid channels are provided on the bottom horizontal plate of the bent plate.

[0010] The above setup is designed to ensure the internal environment of the fixed chamber and to plan the flow path of the filtered solution. In the technical solution of the present invention, the liquid guiding part further includes a sleeve sleeved on the outer side of the top of the liquid guiding tube and fixedly connected to the inner wall of the fixed chamber by bolts, a sleeve welded to the bottom surface of the sleeve and sleeved on the outer side of the liquid guiding tube, and several scrapers snapped and fixed at the bottom end of the sleeve. Several regularly distributed and interconnected liquid outlet grooves are opened on the top wall of the liquid guiding tube, and several regularly distributed and interconnected leakage holes are opened on the sleeve wall above the centrifuge disc.

[0011] This setting is used to perform preliminary filtration of the solution through the pre-filter at the bottom of the liquid delivery tube.

[0012] In the technical solution of the present invention, the reciprocating lead screw is coaxially connected to the output shaft of the motor, the bottom end of the reciprocating lead screw is rotatably connected to the top surface of the lower partition, and the rod teeth are snapped and fixed to the bottom end of the reciprocating lead screw.

[0013] In the technical solution of the present invention, the rotary vacuum section includes a sealing cylinder fixedly connected to the top surface of the fixed chamber by bolts, a sealing cover fixedly connected to the opening of the sealing cylinder by bolts, an eccentric wheel fixedly connected to the outer side of the round rod at the top of the reciprocating screw by a locking pin, a plurality of rotary blades slidably connected to the grooves on the outer side of the eccentric wheel, an air intake pipe and an exhaust pipe clamped and fixed to the outer wall of the sealing cylinder, and the bottom end of the exhaust pipe extends into the interior of the fixed chamber.

[0014] The above configuration creates the effect of a rotary vacuum pump, which forms a negative pressure environment within the fixed chamber, allowing waste liquid to be drawn into the fixed chamber through the liquid guide pipe.

[0015] In the technical solution of the present invention, the rotating ring is rotatably connected to the outside of the top opening of the lower partition plate, the ring teeth are snapped and fixed on the top surface of the rotating ring, the ring teeth mesh with the rod teeth, and the pores of the secondary filter screen are smaller than those of the primary filter screen.

[0016] This feature allows the meshing ring teeth to drive the rotating ring to rotate when the rod teeth rotate, thus performing secondary centrifugal filtration on the waste liquid flowing from the liquid guide tube.

[0017] In the technical solution of the present invention, the transmission group includes two pulleys and a synchronous belt sleeved between the two pulleys. The right pulley is snapped and fixed to the outside of the round rod at the top of the reciprocating screw, and the left pulley is snapped and fixed to the top of the liquid guide tube. The size of the right pulley is smaller than that of the left pulley.

[0018] This setting is used to transmit the power when the reciprocating screw rotates, and to clean the surface of the primary filter screen during the rotation of the liquid guide tube.

[0019] In the technical solution of the present invention, the oscillation mechanism further includes a slide rod that is snapped between the slider and the protruding rod, a fixed frame sleeved on the outside of the slide rod, and two round rods that are snapped and fixed on the top surface of the lower partition plate. The two ends of the slider are slidably connected between the two round rods.

[0020] In the technical solution of the present invention, the top end of the protruding rod extends into the interior of the guide groove, the fixing frame is snapped and fixed on the top surface of the lower partition plate, and the front and rear end walls of the fixing frame are provided with slots that pass through the inside and outside for the protruding rod to pass through. The sleeve frame is open from top to bottom and the size of the frame opening is larger than the size of the liquid passage groove. The top right wall of the sleeve frame is provided with a slot that passes through the inside and outside.

[0021] The above design prevents the activated carbon in the adsorption plate from caking after prolonged waste liquid filtration.

[0022] Compared with the prior art, the beneficial effects of the present invention are: 1. This inkjet printing waste liquid recycling treatment equipment is equipped with a multi-stage filtration and negative pressure recovery structure. When the liquid guide tube rotates, the primary filter screen simultaneously contacts the scraper to remove surface impurities. At the same time, the rod teeth mesh with the ring teeth to drive the rotating ring and the secondary filter screen to rotate at high speed, forming a two-stage filtration linkage structure of dynamic interception and centrifugal separation. This design not only avoids large particle clogging through primary filter self-cleaning, but also uses centrifugal force to enhance the separation of fine suspended matter, improve the waste liquid pretreatment effect, and reduce the load of subsequent treatment.

[0023] 2. This inkjet printing waste liquid recycling treatment equipment is equipped with a multi-stage filtration and negative pressure recovery structure. The reciprocating screw drives the slider to move up and down. Through the linkage between the slider and the convex rod, the adsorption plate generates horizontal reciprocating oscillation, thereby continuously breaking the state of activated carbon accumulation, preventing colloidal organic matter from forming a caking layer, ensuring the carbon layer pores are permeable, extending its service life, and ensuring the long-term effectiveness of the chemical adsorption process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a cross-sectional view of the overall structure of the present invention; Figure 3 This is a cross-sectional schematic diagram of the recycling bin structure in this invention; Figure 4 This is one of the cross-sectional schematic diagrams of a portion of the liquid guiding part in this invention; Figure 5 This is a second cross-sectional schematic diagram of a portion of the liquid guiding section in this invention; Figure 6 This is a schematic diagram showing the partial structural positions of the present invention; Figure 7 This is a structural breakdown diagram of the negative pressure device in this invention; Figure 8 This is a structurally disassembled schematic diagram of the rotary blade vacuum section in this invention; Figure 9 This is a schematic diagram of the centrifuge disc in the present invention; Figure 10 This is a schematic diagram of the transmission assembly in this invention; Figure 11 This is a schematic diagram of the oscillation mechanism in this invention; Figure 12 This is a partial cross-sectional schematic diagram of the oscillation mechanism in this invention; Figure 13 This is a partial schematic diagram of the oscillation mechanism in this invention; Explanation of reference numerals in the attached figures: 100. Recovery bin; 110. Fixed bin body; 111. Upper partition; 120. Liquid guiding section; 121. Liquid guiding pipe; 1210. Liquid outlet trough; 122. Sleeve; 1220. Leakage hole; 123. Sleeve; 124. Scraper; 125. Primary filter screen; 130. Lower partition; 140. Liquid guiding plate; 150. Bending plate; 151. Liquid passage trough; 160. Storage tank; 170. Drain valve; 200. Negative pressure device; 210. Motor; 220. Reciprocating lead screw; 230. Screw teeth; 240. Vacuum section with rotating blades; 241. Sealing cylinder; 242. Sealing cover; 243. Eccentric wheel; 244. Rotating blades; 245. Intake pipe; 246. Exhaust pipe; 300. Centrifuge disc; 310. Rotating ring; 311. Drainage trough; 320. Ring teeth; 330. Secondary filter screen; 400. Transmission assembly; 410. Pulley; 420. Synchronous belt; 500, oscillation mechanism; 510, slider; 520, slide bar; 530, protruding rod; 540, fixed frame; 550, sleeve frame; 551, guide groove; 560, adsorption plate; 570, round rod. Detailed Implementation

[0025] The technical solutions of this invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this invention, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this invention without creative effort are within the scope of protection of this invention.

[0026] Please see Figures 1-5 As shown, this embodiment provides the following technical solution: The inkjet printing waste liquid recycling treatment equipment with multi-stage filtration and negative pressure recovery structure includes a recovery chamber 100, a negative pressure device 200 set on the top of the recovery chamber 100, and a centrifugal disc 300, a transmission group 400 and an oscillation mechanism 500 set inside the recovery chamber 100.

[0027] Specifically, the recycling bin 100 includes a liquid guiding section 120, which includes a liquid guiding pipe 121 with its bottom end extending into the waste liquid and a primary filter screen 125 snapped into the bottom end of the liquid guiding pipe 121.

[0028] Furthermore, the recovery chamber 100 also includes a fixed chamber body 110, a lower partition plate 130 and a liquid guide plate 140 welded and fixed from top to bottom to the inner wall of the left end of the fixed chamber body 110, a bent plate 150 welded to the inner wall of the fixed chamber body 110 near the center, a liquid storage tank 160 snapped and fixed to the bottom right side of the fixed chamber body 110, and a drain valve 170 snapped and fixed to the bottom wall of the liquid storage tank 160.

[0029] Furthermore, an upper partition 111 is welded and fixed to the inner wall of the fixed chamber 110 above the lower partition 130. An opening is provided at the center of the lower partition 130 for the centrifugal disc 300 to rotate. An annular baffle is integrally formed on the bottom surface of the lower partition 130 outside the opening. The top surface of the liquid guide plate 140 is inclined from left to right. Two vertically connected liquid channels 151 are provided on the bottom horizontal plate of the bent plate 150.

[0030] Furthermore, the upper partition 111 in the fixed chamber 110 provides a placement area for the transmission assembly 400, the lower partition 130 provides a rotation platform for the structure in the negative pressure device 200 and the centrifugal disc 300, and the liquid guide plate 140 allows the liquid after secondary filtration to flow towards the bending plate 150. The two liquid passage channels 151 opened on the bottom horizontal plate of the bending plate 150 allow the filtered solution to pass through and directly contact the internal structure of the upper oscillation mechanism 500 before flowing to the storage tank 160. After the drain valve 170 is opened, it is used to discharge the filtered solution in the storage tank 160. This setting is used to ensure the internal environment of the fixed chamber 110 and plan the flow route of the filtered solution.

[0031] Please see Figures 1-5 As shown, in this embodiment, the liquid guiding part 120 further includes a sleeve 122 sleeved on the outer side of the top end of the liquid guiding tube 121 and fixedly connected to the inner wall of the fixed chamber 110 by bolts, a sleeve 123 welded to the bottom surface of the sleeve 122 and sleeved on the outer side of the liquid guiding tube 121, and several scrapers snapped and fixed at the bottom end of the sleeve 123. Several regularly distributed and interconnected liquid outlet grooves 1210 are opened on the top end of the liquid guiding tube 121. Several regularly distributed and interconnected leakage holes 1220 are opened on the sleeve wall above the centrifuge disc 300.

[0032] Furthermore, the liquid guide tube 121 is used to draw in larger particles of dirt from the solution after the solution is under negative pressure inside the fixed chamber 110, through the primary filter 125. The liquid then flows out from the outlet groove 1210 at the top of the liquid guide tube 121 into the sleeve 122, and flows into the centrifuge disc 300 through the leakage hole 1220. The scraper 124 at the bottom of the sleeve 123 is used to clean the surface of the primary filter 125 when the liquid guide tube 121 rotates. This setting is used to perform preliminary filtration of the solution through the primary filter 125 at the bottom of the liquid guide tube 121.

[0033] Please see Figures 6-8 As shown, in this embodiment, the negative pressure device 200 includes a motor 210, a reciprocating lead screw 220 at its end, a rod tooth 230 sleeved at the bottom end of the reciprocating lead screw 220, and a rotary vacuum part 240 sleeved on the outside of the reciprocating lead screw 220. The motor 210 drives the reciprocating lead screw 220 to rotate, thereby causing the rotary vacuum part 240 to form a negative pressure in the recovery chamber 100. The waste liquid is initially filtered by the primary filter screen 125 and then sucked in by the liquid guide pipe 121.

[0034] Specifically, the reciprocating lead screw 220 is coaxially connected to the output shaft of the motor 210, the bottom end of the reciprocating lead screw 220 is rotatably connected to the top surface of the lower partition 130, and the rod tooth 230 is snapped and fixed to the bottom end of the reciprocating lead screw 220.

[0035] Furthermore, the rotary vacuum unit 240 includes a sealing cylinder 241 fixedly connected to the top surface of the fixed chamber 110 by bolts, a sealing cover 242 fixedly connected to the opening of the sealing cylinder 241 by bolts, an eccentric wheel 243 fixedly connected to the outer side of the top round rod of the reciprocating screw 220 by a locking pin, a plurality of rotary blades 244 slidably connected to the grooves on the outer side of the eccentric wheel 243, an air intake pipe 245 and an exhaust pipe 246 fixedly connected to the outer wall of the sealing cylinder 241, the bottom end of the exhaust pipe 246 extending into the interior of the fixed chamber 110.

[0036] Furthermore, after the motor 210 starts, it drives the reciprocating screw 220 and the gear teeth 230 to rotate synchronously. At this time, the rotation of the reciprocating screw 220 will drive the eccentric wheel 243 to rotate inside the sealing cylinder 241. The vane 244 in the slot on the outside of the eccentric wheel 243 will periodically contact the inner wall of the sealing cylinder 241 as the eccentric wheel 243 rotates, and retract into the slot on the outside of the eccentric wheel 243. At this time, the suction pipe 245 draws the gas in the fixed chamber 110 into the sealing cylinder 241 and then discharges it through the exhaust pipe 246, thus creating a negative pressure environment inside the fixed chamber 110. This setting constitutes the effect of a vane vacuum pump, which is used to create a negative pressure environment inside the fixed chamber 110, so that the waste liquid can be drawn into the fixed chamber 110 through the liquid guide pipe 121.

[0037] Please see Figures 7-9As shown, in this embodiment, the centrifuge disc 300 includes a rotating ring 310 disposed outside the liquid guide tube 121 and ring teeth 320 disposed on the top surface of the rotating ring 310.

[0038] Specifically, the rotating ring 310 is rotatably connected to the outside of the top opening of the lower partition 130, the ring teeth 320 are snapped and fixed on the top surface of the rotating ring 310, the ring teeth 320 mesh with the rod teeth 230, and the pores of the secondary filter 330 are smaller than the pores of the primary filter 125.

[0039] Furthermore, the top surface of the rotating ring 310 is provided with several drainage grooves 311 that communicate with the side wall. A secondary filter screen 330 is attached to the outside of the drainage groove 311. When the rod tooth 230 rotates, it engages with the ring tooth 320 to drive the rotating ring 310 to rotate, thereby performing secondary centrifugal filtration on the waste liquid flowing from the liquid guide pipe 121.

[0040] Please see Figures 2-10 As shown, in this embodiment, the transmission group 400 includes two pulleys 410 and a synchronous belt 420 sleeved between the two pulleys 410. The right pulley 410 is snapped and fixed to the outside of the round rod at the top of the reciprocating screw 220, and the left pulley 410 is snapped and fixed to the top of the liquid guide tube 121. The size of the right pulley 410 is smaller than that of the left pulley 410.

[0041] Furthermore, when the reciprocating screw 220 rotates, the pulley 410 sleeved on the outer wall of the reciprocating screw 220 rotates, which in turn drives the pulley 410 at the top of the liquid guide tube 121 to rotate within the sleeve 123 via the synchronous belt 420. This causes the primary filter screen 125 at its bottom to continuously contact the scraper 124, thereby removing dirt from the surface of the primary filter screen 125. This configuration is used to transmit the power when the reciprocating screw 220 rotates, thereby cleaning the surface of the primary filter screen 125 during the rotation of the liquid guide tube 121.

[0042] Please see Figures 11-13 As shown, in this embodiment, the oscillation mechanism 500 includes a slider 510 sleeved on the outside of the reciprocating lead screw 220, a protruding rod 530 that moves with the slider 510, a frame 550 disposed on the outside of the protruding rod 530, and an adsorption plate 560 placed inside the frame 550. A guide groove 551 is provided on the outer wall of the frame 550.

[0043] Specifically, the oscillation mechanism 500 also includes a slide rod 520 that is snapped between the slider 510 and the protruding rod 530, a fixing frame 540 sleeved on the outside of the slide rod 520, and two round rods 570 that are snapped and fixed on the top surface of the lower partition plate 130. The two ends of the slider 510 are slidably connected between the two round rods 570.

[0044] Furthermore, the top end of the protruding rod 530 extends into the interior of the guide groove 551, and the fixing frame 540 is snapped and fixed on the top surface of the lower partition plate 130. The front and rear end walls of the fixing frame 540 are provided with slots that pass through the inside and outside for the protruding rod 530 to pass through. The sleeve frame 550 is vertically continuous and the size of the frame opening is larger than the size of the liquid passage groove 151. The top right wall of the sleeve frame 550 is provided with a slot that passes through the inside and outside.

[0045] Furthermore, the slider 510 moves up and down with the reciprocating screw 220, causing the protruding rod 530 to move along the guide groove 551, driving the sleeve frame 550 and the adsorption plate 560 to oscillate horizontally, preventing carbon layer caking. Specifically, the slider 510 in the oscillation mechanism 500 moves up and down with the reciprocating screw 220, and the protruding rod 530 at its bottom end moves up and down together through the slide rod 520. The protruding rod 530 moves along the guide groove 551, causing the drive sleeve frame 550 and the adsorption plate 560 inside it to oscillate horizontally. This setting prevents the activated carbon in the adsorption plate 560 from caking after long-term waste liquid filtration.

[0046] Finally, it should be noted that the motor 210 involved in this invention is a general standard part or a component known to those skilled in the art. Its structure and principle can be known to those skilled in the art through technical manuals or conventional experimental methods. In the idle part of this device, the motor 210 is connected to an external power source through wires. The specific connection method should refer to the working principle in this invention. The electrical connections between each electrical component are completed in the order of operation. The detailed connection methods are all technologies known in the art.

[0047] When using the inkjet printing waste liquid recycling equipment of the present invention, which is equipped with a multi-stage filtration and negative pressure recovery structure, the recycling bin 100 is first placed next to the waste liquid to be recycled, and the liquid guide pipe 121 in the liquid guide section 120 is ensured to extend below the liquid surface of the waste liquid. Next, the motor 210 in the negative pressure device 200 is started, driving the reciprocating screw 220 and the gear teeth 230 to rotate synchronously. At this time, the rotation of the reciprocating screw 220 will drive the eccentric wheel 243 to rotate inside the sealing cylinder 241. The blade 244 in the slot on the outside of the eccentric wheel 243 will periodically contact the inner wall of the sealing cylinder 241 as the eccentric wheel 243 rotates, and retract into the slot on the outside of the eccentric wheel 243. At this time, the suction pipe 245 draws the gas in the fixed chamber 110 into the sealing cylinder 241 and then discharges it through the exhaust pipe 246, thus creating a negative pressure environment inside the fixed chamber 110. Subsequently, under the influence of air pressure, the waste liquid is initially filtered by the primary filter screen 125 and then drawn into the liquid guide pipe 121. It flows out from the liquid outlet groove 1210 at the top of the liquid guide pipe 121 into the sleeve 122 and flows into the drain groove 311 of the rotating ring 310 from the leakage hole 1220. During this process, the pulley 410 sleeved on the outer wall of the reciprocating screw 220 rotates, and the pulley 410 at the top of the liquid guide tube 121 is linked by the synchronous belt 420, driving the liquid guide tube 121 to rotate inside the sleeve 123, so that the primary filter screen 125 at its bottom continuously contacts the scraper 124, thereby removing the dirt on the surface of the primary filter screen 125. At the same time, when the rod tooth 230 rotates with the reciprocating lead screw 220, the meshing ring tooth 320 drives the rotating ring 310 to rotate, and the waste liquid flowing into the drain tank 311 is subjected to secondary centrifugal filtration through the secondary filter screen 330. In addition, the slider 510 in the oscillation mechanism 500 moves up and down with the rotation of the reciprocating screw 220, and drives the protruding rod 530 at its bottom end to move up and down together through the slider 520. The protruding rod 530 moves along the guide groove 551, so that the drive sleeve 550 and the adsorption plate 560 inside it oscillate horizontally, preventing the activated carbon in the adsorption plate 560 from forming a carbon layer after long-term waste liquid filtration. Afterwards, periodically turn off motor 210 and open drain valve 170 to collect the filtered waste liquid for recycling.

[0048] The foregoing description of specific exemplary embodiments of the invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the invention to the precise forms disclosed, and it will be apparent that many changes and variations can be made in accordance with the foregoing teachings. The exemplary embodiments were chosen and described in order to explain the specific principles of the invention and its practical application, thereby enabling those skilled in the art to implement and utilize various different exemplary embodiments of the invention, as well as various different choices and variations. The scope of the invention is intended to be defined by the specification and its equivalents.

Claims

1. An inkjet printing waste liquid recycling treatment device equipped with a multi-stage filtration and negative pressure recovery structure, characterized in that: It includes a recovery bin, a negative pressure device installed on top of the recovery bin, and a centrifugal disc, transmission assembly, and oscillation mechanism installed inside the recovery bin; The recycling bin includes a liquid guiding section, which includes a liquid guiding pipe with its bottom end extending into the waste liquid and a primary filter screen that is snapped into the bottom end of the liquid guiding pipe. The negative pressure device includes a motor, a reciprocating lead screw at its end, a rod tooth sleeved at the bottom end of the reciprocating lead screw, and a rotary vacuum part sleeved on the outside of the reciprocating lead screw. The motor drives the reciprocating lead screw to rotate, causing the rotary vacuum part to form a negative pressure in the recovery chamber. The waste liquid is initially filtered by the primary filter screen and then sucked in by the liquid guide pipe. The centrifuge disc includes a rotating ring disposed on the outside of the liquid guide tube and ring teeth disposed on the top surface of the rotating ring. The top surface of the rotating ring is provided with several drainage grooves that are connected to the side wall. A secondary filter screen is attached to the outside of the drainage groove wall. When the rod teeth rotate, the meshing ring teeth drive the rotating ring to rotate, and the waste liquid flowing from the liquid guide pipe is centrifuged and filtered for a second time. The oscillation mechanism includes a slider sleeved on the outside of the reciprocating lead screw, a protruding rod that moves with the slider, a frame set on the outside of the protruding rod, and an adsorption plate placed inside the frame. A guide groove is provided on the outer wall of the frame. The slider moves up and down with the rotation of the reciprocating lead screw, allowing the protruding rod to move along the guide groove, driving the frame and the adsorption plate to oscillate horizontally.

2. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The recovery chamber also includes a fixed chamber body, a lower partition and a liquid guide plate welded and fixed from top to bottom to the inner wall of the left end of the fixed chamber body, a bent plate welded to the inner wall of the fixed chamber body near the center, a liquid storage tank snapped and fixed to the bottom right side of the fixed chamber body, and a drain valve snapped and fixed to the bottom wall of the liquid storage tank.

3. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 2, characterized in that: An upper partition is welded and fixed to the inner wall of the fixed chamber above the lower partition. An opening is provided at the center of the lower partition for the centrifugal disc to rotate. An annular baffle is integrally formed on the bottom surface of the lower partition outside the opening. The top surface of the liquid guide plate is inclined from left to right. Two vertically connected liquid channels are provided on the bottom horizontal plate of the bent plate.

4. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The liquid guiding part also includes a sleeve fitted on the outer side of the top of the liquid guiding tube and fixedly connected to the inner wall of the fixed chamber by bolts, a sleeve welded to the bottom surface of the sleeve and fitted on the outer side of the liquid guiding tube, and several scrapers snapped and fixed at the bottom end of the sleeve. Several regularly distributed and interconnected liquid outlet grooves are opened on the top wall of the liquid guiding tube, and several regularly distributed and interconnected leakage holes are opened on the sleeve wall above the centrifuge disc.

5. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The reciprocating lead screw is coaxially connected to the output shaft of the motor, and the bottom end of the reciprocating lead screw is rotatably connected to the top surface of the lower partition. The rod teeth are snapped and fixed to the bottom end of the reciprocating lead screw.

6. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The rotary vacuum unit includes a sealing cylinder fixedly connected to the top surface of the fixed chamber by bolts, a sealing cover fixedly connected to the opening of the sealing cylinder by bolts, an eccentric wheel fixedly connected to the outer side of the round rod at the top of the reciprocating screw by a locking pin, several rotary blades slidably connected to the grooves on the outer side of the eccentric wheel, an intake pipe and an exhaust pipe clamped and fixed to the outer wall of the sealing cylinder, and the bottom end of the exhaust pipe extends into the interior of the fixed chamber.

7. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The rotating ring is rotatably connected to the outside of the top opening of the lower partition plate, and the ring teeth are snapped and fixed on the top surface of the rotating ring. The ring teeth mesh with the rod teeth, and the pores of the secondary filter screen are smaller than those of the primary filter screen.

8. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 1, characterized in that: The transmission assembly includes two pulleys and a synchronous belt sleeved between the two pulleys. The right pulley is snapped and fixed to the outside of the round rod at the top of the reciprocating screw, and the left pulley is snapped and fixed to the top of the liquid guide tube. The size of the right pulley is smaller than that of the left pulley.

9. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 3, characterized in that: The oscillation mechanism also includes a slide rod that is snapped between the slider and the protruding rod, a fixed frame sleeved on the outside of the slide rod, and two round rods that are snapped and fixed on the top surface of the lower partition. The two ends of the slider are slidably connected between the two round rods.

10. The inkjet printing waste liquid recycling treatment equipment with a multi-stage filtration and negative pressure recovery structure according to claim 9, characterized in that: The top of the protruding rod extends into the interior of the guide groove. The fixing frame is snapped and fixed to the top surface of the lower partition plate. The front and rear end walls of the fixing frame are provided with through slots for the protruding rod to pass through. The sleeve is open from top to bottom and the size of the opening is larger than the size of the liquid passage groove. The top of the right wall of the sleeve is provided with a through slot.

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