Spray head adjusting device for printing unit of inkjet printer
The ball valve switching is triggered by the filter plate displacement, and the automatic switching and backflushing of the ink supply pipe of the ink ink is realized, which solves the problem of nozzle blockage, improves the operation stability and production continuity of the ink ink, and reduces ink waste.
Patent Information
- Application Number
- CN202510851909.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-24
- Publication Date
- 2025-07-22
- Estimated Expiration
- Not applicable · inactive patent
AI Technical Summary
The nozzle adjustment device of the existing ink printing unit has problems such as ink impurities that are prone to clogging, the cleaning process needs to be shut down, and the nozzle calibration is complicated.
The filter plate displacement trigger ball valve switching is used to realize automatic switching and backflushing of the ink supply pipe, automatically remove blocked impurities, and avoid nozzle position calibration.
The continuous operation stability and production continuity of the inkjet machine are achieved, reducing ink waste and simplifying the cleaning process.
Smart Images
Figure CN120348068A_ABST
Abstract
Description
Technical Field
[0001] The present invention belongs to the technical field of inkjet printer accessories, and specifically refers to a nozzle adjustment device for the printing unit of an inkjet printer. Background Art
[0002] As an important modern printing device, an inkjet printer is widely used in many fields such as advertising production, decoration, textile printing and dyeing, and digital printing. The existing nozzle adjustment device for the printing unit of an inkjet printer has the following technical problems: (1) During the inkjet process, tiny impurities, pigment aggregates, or air bubbles in the ink flow with the ink and are easily attached to or block key nodes of the inkjet flow channel, especially on the filter screen or filter plate near the nozzle, requiring shutdown maintenance and cleaning. (2) The existing equipment is equipped with an on-line cleaning or off-line ultrasonic cleaning device, which has a complex structure and requires a short-term interruption of the inkjet operation during the cleaning process. (3) It involves the disassembly or movement of the nozzle itself, and complex nozzle position calibration often needs to be carried out after reinstallation to ensure printing accuracy. Summary of the Invention
[0003] The present invention overcomes the deficiencies of the prior art and provides a nozzle adjustment device for the printing unit of an inkjet printer. The water pressure increase caused by the pipeline blockage is used to drive the displacement of the filter plate, triggering the instantaneous release of the pre-tightening torsion spring, synchronously controlling the one-way ball valve and the three-way ball valve to complete the non-interrupted automatic switching of the ink supply pipeline. At the same time, the reverse flushing pipeline automatically reversely introduces the clean ink in the standby pipeline into the blocked pipeline for strong self-flushing, and immediately directs the peeled impurities and flushing waste ink into the return ink pipeline through the interface of the three-way ball valve connected after the switching for recovery and treatment.
[0004] The technical solution adopted by the present invention is as follows: This solution provides a nozzle adjustment device for a printing unit of an inkjet printer, including a fixed seat and a sprayer. The fixed seat provides a basis for the synchronous operation of multiple nozzles. The sprayer array is fixedly arranged at the bottom end of the fixed seat. The sprayer includes a connecting pipe and a nozzle. The first pipe and the second pipe are symmetrically arranged in the connecting pipe, and the first pipe and the second pipe are connected at the head and tail ends to form a parallel dual-ink supply channel, which are used as backups for each other. A one-way ball valve and a three-way ball valve are rotatably connected in both the first pipe and the second pipe. The one-way ball valve and the three-way ball valve are in transmission cooperation. The one-way ball valve controls the on-off of the pipe inlet, and the three-way ball valve switches the outlet direction to complete blockage isolation and waste ink directional derivation. Filter plates are slidably arranged in both the first pipe and the second pipe. The filter plates are arranged between the one-way ball valve and the three-way ball valve. The filter plates are used to filter impurities and at the same time serve as a pressure sensing unit. An anti-flushing pipe is arranged in the connecting pipe, and both ends of the anti-flushing pipe are respectively connected to the first pipe and the second pipe to connect the two pipes and provide a reverse flushing path. The nozzle is fixedly arranged at the bottom end of the connecting pipe, and the nozzle is connected to the bottom end of the connecting pipe.
[0005] Further, a transmission shaft is fixedly connected to the circumferential wall of the one-way ball valve to synchronously transmit the torsional spring rotation force to the one-way ball valve. Torsional springs are symmetrically sleeved at both ends of the transmission shaft. The two end feet of the torsional spring are respectively fixedly connected to the inner wall of the connecting pipe and the circumferential wall of the transmission shaft to store torsional potential energy and release energy instantaneously during blockage to drive the switching.
[0006] Further, a driven rod is fixedly arranged on the circumferential wall of the three-way ball valve. The driven rod is in transmission cooperation with the transmission shaft to synchronously transmit the rotation force to the three-way ball valve.
[0007] Further, a first return spring is fixedly arranged at the bottom end of the filter plate. The other end of the first return spring is fixedly connected to the inner wall of the connecting pipe to maintain the initial position of the filter plate and reset it after flushing. A transmission cone rod is fixedly arranged on the side wall of the filter plate.
[0008] Further, a limiting cone plate is slidably arranged on the inner wall of the connecting pipe to lock the end feet of the torsional spring and maintain the pre-tightened state. A second return spring is fixedly arranged at the end of the limiting cone plate away from the axis of the connecting pipe. The other end of the second return spring is fixedly connected to the inner wall of the connecting pipe. The limiting cone plate and the transmission cone rod are arranged in a slope fit, and the limiting cone plate is in movable contact with the transmission shaft.
[0009] Further, a return ink pipe penetrates through the connecting pipe. The return ink pipe is connected to the two three-way ball valves to directionally recover waste ink and impurities, and the closed-loop treatment reduces waste.
[0010] The beneficial effects achieved by the present invention with the above structure are as follows: (1)When the filter plate of the pipeline is blocked by ink impurities, the water pressure inside the pipeline increases, forcing the filter plate to move downward against the resistance of the first return spring, releasing the limit on the torsion spring in the pre-tightened energy storage state, causing the torsion spring to instantaneously release, driving the transmission shaft to rotate at high speed, completing the precise switching state of the one-way ball valve and the three-way ball valve, conducting ink supply through the standby pipeline, closing the inlet of the blocked pipeline, and keeping the ink supply path at the outlet of the inkjet channel unchanged, avoiding the need for nozzle position calibration, and improving the continuous operation stability and production continuity of the equipment; (2)While the pipeline is switched and the standby pipeline starts to supply ink normally, the internally connected backflush pipeline automatically introduces some clean ink in the standby pipeline into the blocked pipeline switched to the backflush state. The reverse flow of the clean ink strongly flushes the filter plate, peeling off the blocked impurities. The peeled impurities and the flushing ink are immediately directed and introduced into the ink return pipeline through the interface of the three-way ball valve switched to the connected state, and finally flow back to the ink bucket for recycling or disposal, without manual intervention or additional cleaning media, completely removing the blockage source and significantly reducing ink waste. Description of the Drawings
[0011] Figure 1 It is a schematic structural diagram of a nozzle adjustment device for a printing unit of an inkjet printer proposed by the present invention; Figure 2 It is a schematic structural diagram of a sprayer proposed by the present invention; Figure 3 It is a schematic cross-sectional structure diagram of a connecting pipe proposed by the present invention Figure 1 ; Figure 4 It is a schematic structural diagram of an ink return pipeline proposed by the present invention; Figure 5 It is a schematic transmission structure diagram of a one-way ball valve and a three-way ball valve proposed by the present invention; Figure 6 is Figure 3 The partial enlarged view of part A in Figure 7 It is a schematic structural diagram of a limit cone plate proposed by the present invention.
[0012] Among them, 1. Fixed seat, 2. Sprayer, 3. Connecting pipe, 4. Nozzle, 5. First pipeline, 6. Second pipeline, 7. One-way ball valve, 8. Three-way ball valve, 9. Transmission shaft, 10. Torsion spring, 11. Driving bevel gear, 12. Driven rod, 13. Driven bevel gear, 14. Ink return pipeline, 15. Filter plate, 16. First return spring, 17. Transmission cone rod, 18. Backflush pipeline, 19. Limit cone plate, 20. Second return spring, 21. Limit rod.
[0013] The drawings are used to provide further understanding of the present invention, and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention. Detailed implementation manners
[0014] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts belong to the scope of protection of the present invention.
[0015] Embodiment 1: Please refer to Figures 1 - 7, this embodiment provides a nozzle adjustment device for a printing unit of an inkjet printer, including a fixed seat 1 and a sprayer 2. The sprayer 2 is fixedly arranged in an array at the bottom end of the fixed seat 1. The sprayer 2 includes a connecting pipe 3 and a nozzle 4. An ink inlet is provided through the top end of the connecting pipe 3, and an ink outlet is provided through the bottom end of the connecting pipe 3. A first pipe 5 and a second pipe 6 are symmetrically arranged in the connecting pipe 3. The first pipe 5 and the second pipe 6 are communicated at the head and tail ends. The top ends of the first pipe 5 and the second pipe 6 are both communicated with the ink inlet, and the bottom ends of the first pipe 5 and the second pipe 6 are both communicated with the ink outlet. A one-way ball valve 7 and a three-way ball valve 8 are rotatably connected in both the first pipe 5 and the second pipe 6. The one-way ball valve 7 is in transmission cooperation with the three-way ball valve 8. A transmission shaft 9 is fixedly connected to the circumferential wall of the one-way ball valve 7. Two torsion springs 10 are symmetrically sleeved on both ends of the transmission shaft 9. The two end feet of the torsion spring 10 are respectively fixedly connected to the inner wall of the connecting pipe 3 and the circumferential wall of the transmission shaft 9. Two sets of transmission bevel gears 11 are fixedly arranged on the transmission shaft 9. Each set of transmission bevel gears 11 has two. The transmission teeth of the two transmission bevel gears 11 in each set are staggered. Limit rods 21 are symmetrically and fixedly arranged on the transmission shaft 9; A driven rod 12 is fixedly arranged on the circumferential wall of the three-way ball valve 8. The driven rod 12 is in transmission cooperation with the transmission shaft 9. A driven bevel gear 13 is fixedly arranged at the bottom end of the driven rod 12. The driven bevel gear 13 is in meshing cooperation with the transmission bevel gear 11. Each driven bevel gear 13 is in meshing cooperation with a set of two transmission bevel gears 11. The staggered transmission teeth of the two transmission bevel gears 11 drive the driven bevel gear 13 to rotate forward and backward intermittently; A return ink pipeline 14 is provided through the connecting pipe 3. The return ink pipeline 14 is communicated with the two three-way ball valves 8; Filter plates 15 are slidably arranged in both the first pipe 5 and the second pipe 6. The filter plates 15 are arranged between the one-way ball valve 7 and the three-way ball valve 8. A first return spring 16 is fixedly arranged at the bottom end of the filter plate 15. The other end of the first return spring 16 is fixedly connected to the inner wall of the connecting pipe 3. A transmission cone rod 17 is fixedly arranged on the side wall of the filter plate 15; A backwashing pipeline 18 is arranged in the connecting pipe 3. The two ends of the backwashing pipeline 18 are respectively communicated with the first pipe 5 and the second pipe 6. A limit cone plate 19 is slidably arranged on the inner wall of the connecting pipe 3. A second return spring 20 is fixedly arranged at the end of the limit cone plate 19 away from the axis of the connecting pipe 3. The other end of the second return spring 20 is fixedly connected to the inner wall of the connecting pipe 3. The limit cone plate 19 is located on the movement path of the transmission cone rod 17. The limit cone plate 19 and the transmission cone rod 17 are arranged in a slope matching manner. The limit cone plate 19 is in movable contact with the limit rod 21. The nozzle 4 is communicated with the ink outlet at the bottom end of the connecting pipe 3; In this embodiment, in the initial state, the two torsion springs 10 both pre-store elastic potential energy, the limiting cone plate 19 conflicts with the limiting rod 21, the two three-way ball valves 8 are in opposite states to each other, and the two single-way ball valves 7 are in opposite states to each other. In the initial state, the first pipeline 5 is connected, the second pipeline 6 is closed, and the three-way ball valve 8 of the second pipeline 6 connects the second pipeline 6 and the ink return pipeline 14. After the ink enters from the ink inlet, it enters the first pipeline 5 and flows into the nozzle 4 from the ink outlet for spraying. During the spraying process, impurities in the ink are filtered by the filter plate 15 of the first pipeline 5. The filter plate 15 of the first pipeline 5 is blocked, so that the water pressure of the first pipeline 5 increases, pushing the filter plate 15 of the first pipeline 5 to move toward the ink outlet and compressing the first return spring 16 of the first pipeline 5. The filter plate 15 of the first pipeline 5 drives the transmission cone rod 17 and the limiting cone plate 19 The limiting cone plate 19 and the limiting rod 21 of the first pipe 5 are released from the limit, and the torsion spring 10 of the first pipe 5 releases the elastic potential energy, driving the transmission shaft 9 to rotate. The transmission shaft 9 rotates to switch the conduction state of the two one-way ball valves 7. The rotation of the transmission shaft 9 drives the transmission bevel gear 11 and the driven bevel gear 13 to engage in transmission, driving the driven rod 12 and the three-way ball valve 8 to rotate forward, thereby switching the conduction state of the two three-way ball valves 8. At this time, the first pipe 5 is closed and the second pipe 6 is connected. After the first pipe 5 is closed, no ink enters, the first reset spring 16 is reset, driving the filter plate 15 to move toward the ink inlet, the transmission cone rod 17 is released from the conflict with the limiting cone plate 19, and the second reset spring 20 is reset, driving the limiting cone plate 19 to move toward the axis of the connecting pipe 3.
[0016] After the states of the three-way ball valve 8 and the one-way ball valve 7 are switched, the second pipeline 6 is connected and the first pipeline 5 is closed. The three-way ball valve 8 of the first pipeline 5 connects the first pipeline 5 and the ink return pipeline 14. The ink enters the ink outlet from the second pipeline 6. The ink enters the first pipeline 5 from the backwashing pipeline 18, backwashes the filter plate 15, and brings impurities into the ink return pipeline 14 connected by the three-way ball valve 8. The ink return pipeline 14 can be connected to the ink barrel to complete the circulation of the ink.
[0017] When the first pipe 5 is clogged by ink impurities and the filter plate 15 is displaced under pressure, the filter plate 15 overcomes the resistance of the first return spring 16 and moves downward, and the limiting cone plate 19 is pushed outward by the transmission cone rod 17 to release the lock of the preloaded torsion spring 10. The torsion spring 10 releases elastic potential energy and drives the transmission shaft 9 to rotate. When the transmission shaft 9 rotates, the transmission bevel gear 11 and the driven bevel gear 13 are meshed to synchronously control the actions of the two sets of ball valves: The one-way ball valve 7 rotates 90°: the one-way ball valve 7 in the first pipeline 5 turns from open to closed, blocking the ink inlet, and the one-way ball valve 7 in the second pipeline 6 turns from closed to open, connecting to the ink outlet.
[0018] The three-way ball valve 8 rotates 90°: the three-way ball valve 8 in the first pipeline 5 changes from connecting the ink inlet and blocking the ink return pipeline 14 to connecting the ink return pipeline 14 and blocking the ink inlet; the three-way ball valve 8 in the second pipeline 6 changes from connecting the ink return pipeline 14 and blocking the ink inlet to connecting the ink inlet and blocking the ink return pipeline 14.
[0019] After switching, the second pipeline 6 forms a complete passage: ink inlet → one-way ball valve 7 (connected) → second pipeline 6 → three-way ball valve 8 (connected to ink outlet) → nozzle 4. The access point of the backwash pipeline 18 is located in the middle section of the second pipeline 6. The ink is diverted under pressure, and a part of it enters the first pipeline 5 through the backwash pipeline 18. The one-way ball valve 7 of the first pipeline 5 (closed) backwashes the filter plate with the diverted ink. The flushed ink is recovered by the three-way ball valve 8 of the first pipeline 5 (connected to the ink return pipeline 14), and the other part continues to flow to the ink outlet to ensure that printing and flushing are carried out simultaneously.
[0020] When the filter plate 15 of the second pipe 6 is blocked, the filter plate 15 of the second pipe 6 drives the transmission cone rod 17 to conflict with the limiting cone plate 19, the limiting cone plate 19 and the limiting rod 21 of the second pipe 6 are released from the limiting position, and the torsion spring 10 of the second pipe 6 releases the elastic potential energy, driving the transmission shaft 9 to rotate. Due to the staggered transmission teeth of the two transmission bevel gears 11, the transmission bevel gears 11 mesh with the driven bevel gear 13, driving the driven rod 12 and the three-way ball valve 8 to rotate in the opposite direction, completing the state switching of the three-way ball valve 8.
[0021] Depend on Figure 7 It can be seen that the side wall of the limiting cone plate 19 proposed in this solution is also conical. Therefore, the filter plate 15 overcomes the resistance of the first return spring 16 and moves downward, and the limiting cone plate 19 is pushed outward by the transmission cone rod 17. The limiting cone plate 19 will push the torsion spring 10 to store elastic potential energy again.
[0022] The present invention and its embodiments are described above, which is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it and design structural methods and embodiments similar to the technical solution without creativity without departing from the purpose of the invention, they should all fall within the protection scope of the present invention.
Claims
1. A nozzle adjusting device for a printing unit of an inkjet printer, comprising a fixed seat (1) and a sprayer (2), wherein the sprayers (2) are fixedly arranged in an array at the bottom end of the fixed seat (1), and it is characterized in that: The sprayer (2) includes a connecting pipe (3) and a spray head (4). A first pipe (5) and a second pipe (6) are symmetrically arranged in the connecting pipe (3). The first pipe (5) and the second pipe (6) are communicated at both the head and the tail. A one-way ball valve (7) and a three-way ball valve (8) are rotatably connected in both the first pipe (5) and the second pipe (6). The one-way ball valve (7) is in transmission cooperation with the three-way ball valve (8). Filter plates (15) are slidably arranged in both the first pipe (5) and the second pipe (6). The filter plates (15) are arranged between the one-way ball valve (7) and the three-way ball valve (8). A backwashing pipe (18) is arranged in the connecting pipe (3). Both ends of the backwashing pipe (18) are respectively communicated with the first pipe (5) and the second pipe (6). The spray head (4) is fixedly arranged at the bottom end of the connecting pipe (3). The spray head (4) is communicated with the bottom end of the connecting pipe (3); A transmission shaft (9) is fixedly connected to the circumferential wall of the one-way ball valve (7). Limit rods (21) are symmetrically and fixedly arranged on the transmission shaft (9).
2. The nozzle adjusting device for a printing unit of an inkjet printer according to claim 1, wherein: Torsion springs (10) are symmetrically sleeved at both ends of the transmission shaft (9). The two end feet of the torsion spring (10) are respectively fixedly connected to the inner wall of the connecting pipe (3) and the circumferential wall of the transmission shaft (9).
3. The nozzle adjusting device for a printing unit of an inkjet printer according to claim 2, wherein: A driven rod (12) is fixedly arranged on the circumferential wall of the three-way ball valve (8). The driven rod (12) is in transmission cooperation with the transmission shaft (9).
4. The nozzle adjusting device for a printing unit of an inkjet printer according to claim 2, characterized in that: A first return spring (16) is fixedly arranged at the bottom end of the filter plate (15). The other end of the first return spring (16) is fixedly connected to the inner wall of the connecting pipe (3). A transmission cone rod (17) is fixedly arranged on the side wall of the filter plate (15).
5. The nozzle adjustment device for the printing unit of an inkjet printer according to claim 4, characterized in that: A limit cone plate (19) is slidably arranged on the inner wall of the connecting pipe (3). A second return spring (20) is fixedly arranged at one end of the limit cone plate (19) away from the axis of the connecting pipe (3). The other end of the second return spring (20) is fixedly connected to the inner wall of the connecting pipe (3). The limit cone plate (19) and the transmission cone rod (17) are arranged in a slope matching manner. The limit cone plate (19) is in movable contact with the transmission shaft (9).
6. The nozzle adjusting device for the printing unit of an inkjet printer according to claim 1, characterized in that: An ink return pipe (14) penetrates through the connecting pipe (3). The ink return pipe (14) is communicated with the two three-way ball valves (8).