An ink circulating device for a printing press

Abstract

The present application belongs to the technical field of printing machine, and particularly relates to an ink circulating device for printing machine, which comprises an ink groove, an ink barrel communicated with an oil outlet pipe and an oil inlet pipe, a shell and a stirring part. The stirring part comprises a rotating shaft, a bearing tube and a driving rod. The rotating shaft is arranged in the shell and connected with a motor at the upper end. The lower end of the rotating shaft is fixedly connected with the middle part of the inner bottom surface of the bearing tube. The bearing tube is fixedly connected with a bearing ring on the upper end of the peripheral wall. The bearing ring is provided with a plurality of semicylinders with convex top surfaces arranged in the circumferential direction. The inner top surface of the shell is vertically provided with the driving rod. The outlet of the oil outlet pipe penetrates the shell. The lower end of the shell is connected with the oil inlet pipe through a vertical pipe. The vertical pipe is provided with a filter. The present application solves the problems that impurities in the external environment easily enter the ink to affect the subsequent production, and the ink in the ink barrel is prone to caking and peeling due to long standing time, thereby affecting the flow of the ink.

Description

Technical Field

[0001] This invention belongs to the field of printing press technology, and specifically relates to an ink circulation device for printing presses. Background Technology

[0002] During the operation of a gravure printing press, the ink used for printing is prone to peeling, clumping, or sedimentation when it remains stagnant for extended periods. To address this issue, a common method is to create ink flow by using a circulating pump to draw ink from the ink tank to the ink reservoir, and then the ink in the ink reservoir returns to the ink tank, thus creating flow. However, the ink in the ink reservoir needs to be exposed to the environment before it can be transferred to the printing rollers. This allows impurities such as particles and paper scraps from the working environment to enter the ink. If these impurities are not removed, they can easily transfer to the printed product during subsequent printing processes, affecting print quality. Furthermore, the ink tanks used to hold the ink are generally large, and the poor flowability of the ink within them can also lead to peeling and clumping, reducing ink uniformity and affecting subsequent ink circulation. Summary of the Invention

[0003] This invention addresses the problems of impurities from the external environment easily entering the ink during ink circulation in printing presses, affecting subsequent production, and the ink in ink tanks easily clumping and peeling, hindering ink flow. It provides an ink circulation device for printing presses that can prevent ink from clumping and peeling in ink tanks and facilitate the removal of impurities from the ink.

[0004] To achieve the above objectives, the technical solution of the present invention is as follows: An ink circulation device for a printing press includes an ink tank and an ink container. One end of the ink tank is connected to an ink outlet pipe, and the other end is connected to an ink inlet pipe. An oil pump is installed on the inlet pipe. The ink container is positioned between the outlet pipe and the inlet pipe. The ink container includes a shell and a stirring component. The stirring component includes a rotating shaft, a support tube, and a drive rod. The upper end of the rotating shaft passes through the top plate of the shell and is connected to a motor. The lower end of the rotating shaft is provided with a support cylinder and is fixedly connected to the inner bottom surface of the support cylinder. The rotating shaft has an array of protrusions on its peripheral wall. The inner wall of the support tube has multiple sliding grooves corresponding to the protrusions. The support tube slides vertically around the rotating shaft, with its lower end extending into the support cylinder and touching the inner bottom surface of the support cylinder. A spring is connected between the components. A bearing ring is fixedly sleeved on the outer side of the upper end of the bearing tube. The top surface of the bearing ring has a circumferential array of upward-facing semi-cylinders. Multiple stirring blades located below the bearing ring are arranged on the side of the bearing tube. A drive rod is fixedly arranged on the lower side of the top plate. The lower end of the drive rod is provided with a ball bearing that rolls in contact with the top surface of the bearing ring. The outlet of the oil outlet pipe is connected to the inside of the housing. A vertical pipe is arranged at the bottom of the housing. The vertical pipe is connected to the oil inlet pipe. A filter element is arranged on the vertical pipe. The ink in the ink tank enters the ink bucket through the oil outlet pipe, then goes through the vertical pipe to the oil inlet pipe, and then returns to the ink tank. The bearing tube is driven to rotate by a motor, which in turn causes the stirring blades to rotate and stir the ink in the ink bucket.

[0005] Preferably, the housing is fixed on the base, and the base supports the ink barrel.

[0006] Preferably, each of the semi-cylinders is arranged radially along the bearing ring, and a plurality of the semi-cylinders are arranged in a ring at equal intervals around the axis of rotation on the top surface of the bearing ring.

[0007] Preferably, one end of the vertical tube passes through the bottom plate of the housing and connects to the inside of the housing, while the other end connects to the oil inlet pipe. The vertical tube has a circumferential array of strip holes, through which the ink in the ink tank is transported to the oil inlet pipe.

[0008] Preferably, the filter element includes a sleeve, a first filter screen, and a second filter screen. The sleeve is a transparent cylindrical body with an open upper end and a fixed lower end fitted onto a vertical pipe. The sleeve's peripheral wall surrounds multiple strip-shaped holes. The upper opening of the sleeve is sealed by a cover plate. Each of the strip-shaped holes has a first filter screen in its lower section. A second filter screen is fixedly installed inside the vertical pipe. The second filter screen is a hollow hemisphere with mesh holes and upward-facing protrusions. The second filter screen and the first filter screen are connected to form an internal filter structure. A cleaning component is provided inside the sleeve. The ink in the vertical pipe enters the oil inlet pipe after being filtered by the second filter screen and the first filter screen, while impurities remain inside the sleeve.

[0009] Preferably, the lower outer wall of the second filter screen is connected to the upper inner wall of the first filter screen.

[0010] Preferably, the cleaning assembly includes a filter screen three and uprights. The filter screen three is a hollow frustum with openings at the top and bottom and mesh holes on its peripheral walls. The filter screen three is fitted over the vertical tube inside the lower part of the sleeve. The top surface of the filter screen three is fixedly connected to the cover plate via multiple uprights. After the cover plate is removed, the filter screen three moves synchronously when the cover plate slides up and down.

[0011] Preferably, the upper end of the inner wall of the third filter screen is lower than the upper end of the first filter screen and contacts the outer wall of the vertical tube, and the lower end of the peripheral wall of the third filter screen contacts the lower end of the inner wall of the sleeve, ensuring that the filtered impurities are located above the third filter screen and inside the sleeve outside the first filter screen.

[0012] Preferably, a valve is provided on the vertical tube on the upper side of the cover plate. The distance from the cover plate to the valve is greater than the distance from the cover plate to the lower end of the sleeve. The valve is used to regulate whether the ink in the ink tank flows out, and at the same time, the distance from the cover plate to the valve is limited. After the cover plate is removed, it is ensured that the filter screen can be brought out of the sleeve when the cover plate slides upward.

[0013] Preferably, there are two drive rods arranged symmetrically about the pivot, and both drive rods are in a vertical position.

[0014] The beneficial effects of the present invention through the above technical solution are as follows: 1. This invention uses a motor-driven shaft to rotate the carrier tube. The stirring blades on the carrier tube stir the ink inside the shell. As the carrier tube rotates, the stirring blades also move up and down, further enhancing the stirring effect and preventing the ink from clumping and peeling, thereby enhancing the fluidity of the ink.

[0015] 2. The present invention can filter impurities in ink through the filter element, so as to prevent impurities from re-entering the ink tank during the ink circulation process. Moreover, the cleaning component can easily clean impurities in the sleeve. Attached Figure Description

[0016] Figure 1 A schematic diagram of the structure of the present invention.

[0017] Figure 2 This is a schematic diagram of the connection between the ink tank and the base of the present invention. Figure 1 .

[0018] Figure 3 This is a schematic diagram of the connection between the ink tank and the base of the present invention. Figure 2 .

[0019] Figure 4 For the present invention Figure 3 Enlarged view of point A in the middle.

[0020] Figure 5 This is a schematic diagram showing the connection between the cover plate and the filter screen three of the present invention.

[0021] Figure 6 This is a schematic diagram of the vertical tube structure of the present invention.

[0022] Figure 7 This is a schematic diagram of the structure of the bearing tube, bearing ring, and stirring blade of the present invention.

[0023] The labels in the attached diagram are as follows: 1 is the ink tank, 2 is the oil outlet pipe, 3 is the oil inlet pipe, 4 is the oil pump, 5 is the housing, 6 is the rotating shaft, 7 is the bearing pipe, 8 is the drive rod, 9 is the bearing cylinder, 10 is the motor, 11 is the through hole, 12 is the protruding rib, 13 is the spring, 14 is the slide groove, 15 is the bearing ring, 16 is the semi-cylinder, 17 is the stirring blade, 18 is the nut, 19 is the ball bearing, 20 is the horizontal plate, 21 is the bearing rod, 22 is the vertical pipe, 23 is the strip hole, 24 is the sleeve, 25 is the first filter screen, 28 is the second filter screen, 29 is the cover plate, 30 is the third filter screen, 31 is the upright rod, 32 is the valve, 33 is the top plate, and 34 is the screw. Detailed Implementation

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figures 1 to 7 As shown, this embodiment provides an ink circulation device for a printing press, including an ink tank 1 and an ink container. One end of the ink tank 1 is connected to an ink outlet pipe 2, and the other end is connected to an ink inlet pipe 3. An oil pump 4 is installed on the oil inlet pipe 3. The ink container is located between the ink outlet pipe 2 and the oil inlet pipe 3. After the oil pump 4 is started, it drives the ink in the ink container to be drawn out and transported to the ink tank 1 through the oil inlet pipe 3. The ink in the ink tank 1 enters the ink container through the ink outlet pipe 2, forming an ink circulation. The ink is replenished by injecting new ink into the ink tank 1.

[0025] The ink container includes a shell 5 and a stirring component. The shell 5 is a cylindrical body with an open top sealed by a top plate 33. The shell 5 is fixed to a base. The stirring component includes a rotating shaft 6, a bearing tube 7, and a drive rod 8. The upper end of the rotating shaft 6 passes through the top plate 33 of the shell 5 and is connected to a motor 10. The lower end of the rotating shaft 6 is provided with a bearing tube 9 and is fixedly connected to the middle of the inner bottom surface of the bearing tube 9. The bearing tube 9 is a cylindrical body with an open top and a closed bottom, and an inner diameter larger than the diameter of the rotating shaft 6. The rotating shaft 6 has ribs 12 arrayed on its peripheral wall. The ribs 12 are arranged along... A long strip rod is positioned along the height of the rotating shaft 6. The bearing tube 7 is slidably sleeved around the rotating shaft 6. The lower end of the bearing tube 7 extends into the bearing cylinder 9 and is connected to the inner bottom surface of the bearing cylinder 9 by a spring 13. The spring 13 is sleeved on the outside of the rotating shaft 6. Multiple sliding grooves 14 are formed on the inner wall of the bearing tube 7, corresponding to the protrusions 12. The sliding grooves 14 and the corresponding protrusions 12 are in sliding contact. When the rotating shaft 6 rotates, the bearing tube 7 is rotated through the protrusions 12. A bearing ring 15 is fixedly sleeved on the outer side of the upper end of the bearing tube 7. Ring 15 is a circular plate with its inner wall fixedly connected to the support tube 7. The top surface of the support ring 15 has a circumferential array of upward-facing semi-cylinders 16, each semi-cylinder 16 arranged radially along the support ring 15. Multiple semi-cylinders 16 are arranged in an equidistant ring around the rotating shaft 6 on the top surface of the support ring 15. Multiple stirring blades 17 are arranged on the side of the support tube 7 below the support ring 15. When the support tube 7 rotates, the stirring blades 17 rotate accordingly, thus stirring the ink in the ink container. A drive rod is fixedly installed on the lower side of the top plate 33. 8. The drive rods 8 are configured as two and symmetrically arranged with the rotating shaft 6 as the center. Both drive rods 8 are in a vertical state. The lower end of each drive rod 8 is provided with a ball bearing 19 that rolls and contacts the top surface of the bearing ring 15. When the bearing ring 15 rotates, as multiple semi-cylinders 16 successively contact the ball bearing 19, the bearing tube 7 moves up and down reciprocally under the action of the spring 13. The outlet of the oil outlet pipe 2 is connected to the inside of the housing 5. A vertical pipe 22 is provided at the bottom of the housing 5. The vertical pipe 22 is connected to the oil inlet pipe 3. A filter element is provided on the vertical pipe 22.

[0026] The base includes a horizontal plate 20 and a support rod 21. The horizontal plate 20 is a rectangular plate. The support rod 21 is vertically fixed to each of the four corners of the bottom surface of the horizontal plate 20. The lower end of the shell 5 passes through the horizontal plate 20, and the perimeter of the shell 5 and the horizontal plate 20 are fixedly connected by a commonly used fixing method in the art, such as welding, or a fixing ring is provided on the outer wall of the shell 5. The outer diameter of the fixing ring is larger than the diameter of the circular hole opened on the horizontal plate 20 for passing through the shell 5. The shell 5 is fixed by pressing it onto the horizontal plate 20. The ink barrel is fixed by the horizontal plate 20 and supported by the support rod 21. The oil outlet pipe 2 is located above the horizontal plate 20.

[0027] One end of the vertical tube 22 passes through the bottom plate of the housing 5 and connects to the inside of the housing 5, while the other end connects to the oil inlet pipe 3. The vertical tube 22 has strip-shaped holes 23 arranged in a circumferential array. The strip-shaped holes 23 are rectangular holes arranged along the height direction of the vertical tube 22. For easy installation, the vertical tube is composed of an upper section and a lower section that can be detachably connected. The strip-shaped holes 23 and the filter element are both located at the upper part of the lower section of the vertical tube.

[0028] The filter element includes a sleeve 24, a first filter screen 25, and a second filter screen 28. The sleeve 24 is a transparent cylinder made of plexiglass, open at the top and fixedly fitted onto the vertical pipe 22 at the bottom. The inner diameter of the sleeve 24 is larger than the outer diameter of the vertical pipe 22. The peripheral wall of the sleeve 24 surrounds multiple strip-shaped holes 23. The upper opening of the sleeve 24 is sealed by a cover plate 29, which is a circular ring plate. The cover plate 29 is fitted onto the vertical pipe 22 and detachably connected to the sleeve 24. The top of the sleeve 24 is provided with multiple upward-facing screws 34. The cover plate 29 has through holes 11 corresponding to the screws 34. The screws 34 pass through the corresponding through holes 11 and are threaded with nuts 18. Each strip-shaped hole 23 contains... Each section is equipped with a filter screen 25. A filter screen 28 is fixedly installed inside the vertical tube 22. The filter screen 28 is a hollow hemisphere with mesh holes and upward protrusions. The filter screen 28 and the filter screen 25 are connected to form an internal filter structure. The lower outer wall of the filter screen 28 is connected to the upper inner wall of the filter screen 25. The lower end of the filter screen 28 is set as a rigid steel ring. The filter screen 28 is fixed by binding the rigid steel ring to the upper end of the inner wall of the filter screen 25. The outer side of the rigid steel ring is close to the inner wall of the vertical tube 22. The ink transported in the vertical tube 22 is filtered through the filter screen 28. The filtered impurities are washed by the ink through the upper arc surface of the filter screen 28 and enter the sleeve 24 through the strip hole 23. The sleeve 24 is equipped with a cleaning component.

[0029] The cleaning assembly includes a filter screen 30 and uprights 31. The filter screen 30 is a hollow frustum with openings at the top and bottom and mesh holes on its peripheral walls. The filter screen 30 is fitted over the vertical tube 22 inside the lower part of the sleeve 24. The upper end of the inner wall of the filter screen 30 is lower than the upper end of the filter screen 25 and contacts the outer wall of the vertical tube 22. The lower end of the peripheral wall of the filter screen 30 contacts the lower end of the inner wall of the sleeve 24. Ink and impurities entering the sleeve 24 are filtered by the filter screen 30, ensuring that the ink can smoothly enter the oil inlet pipe 3, while the impurities are left on the filter screen 30. The top surface of the filter screen 30 is fixedly connected to the cover plate 29 by multiple uprights 31. After the cover plate 29 is removed, the filter screen 30 can move up and down with the cover plate 29.

[0030] A valve 32 is provided on the vertical pipe 22 on the upper side of the cover plate 29. The distance from the cover plate 29 to the valve 32 is greater than the distance from the cover plate 29 to the lower end of the sleeve 24. After the cover plate 29 is removed, it is ensured that the cover plate 29 can be moved up along the vertical pipe 22 to the filter screen 30 and disengage from the sleeve 24.

[0031] When in use, valve 32 on vertical pipe 22 is opened, oil pump 4 is started, driving the ink in ink tank 1 to circulate. The ink in ink bucket enters ink tank 1 through oil inlet pipe 3, and then enters ink bucket through oil outlet pipe 2.

[0032] Motor 10 drives shaft 6 to rotate. Since shaft 6 has multiple protrusions 12 located in the grooves 14 on the bearing tube 7, when shaft 6 rotates, it will drive the bearing tube 7 to rotate synchronously with shaft 6. The bearing ring 15 is fixedly connected to the bearing tube 7. The bearing ring 15 will rotate with the bearing tube 7. The stirring blade 17 on the bearing tube 7 will stir the ink in the housing 5. During the rotation of bearing ring 15, when the ball 19 on drive rod 8 contacts any semi-cylinder 16, it will push the semi-cylinder 16 downward. The semi-cylinder 16 will drive the bearing ring 15 to move downward. The bearing tube 7 will move downward with the bearing ring 15. The spring 13 will be compressed. When the ball 19 on drive rod 8 no longer contacts the semi-cylinder 16, under the restoring force of spring 13, the bearing tube will drive the bearing ring 15 to move upward and return to the initial state. Therefore, during the rotation of bearing tube 7, the stirring blade 17 on the bearing tube 7 will also move back and forth in the up and down direction, further enhancing the stirring effect, preventing ink from clumping and peeling, and thus enhancing the fluidity of the ink.

[0033] When the ink in the housing 5 flows downward through the vertical pipe 22, it is first filtered by the second filter screen 28 before flowing downward. Since the second filter screen 28 is a hollow hemisphere with a mesh opening facing upward, impurities (such as particles, paper scraps, etc.) on the top surface of the second filter screen 28 will flow into the sleeve 24 through the strip-shaped holes 23 on the upper side of the first filter screen 25 and be located on the upper side of the third filter screen 30. The ink entering the sleeve 24, after being filtered by the first filter screen 25, enters the vertical pipe 22 and flows downward. During this process, impurities in the ink will remain in the sleeve 24 and will not enter the oil inlet pipe 3 through the vertical pipe 22; through the transparent sleeve When it is observed that there are many impurities in the sleeve 24, the motor 10 is turned off and the valve 32 is closed. The oil pump 4 continues to work, drawing the ink in the vertical pipe 22 into the ink tank 1 until the ink in the sleeve 24 is lower than the cover plate 29. Then the oil pump 4 stops working. Then, by turning the nut 18, the cover plate 29 is removed, so that the cover plate 29 moves upward along the vertical pipe 22. The cover plate 29 pulls the filter screen 30 upward through the upright rod 31. During the upward movement, the filter screen 30 will carry the impurities in the sleeve 24. After the filter screen 30 is higher than the sleeve 24 (i.e., moves upward away from the sleeve 24), the impurities on the filter screen 30 can be cleaned.

[0034] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present invention should be included within the scope of the present invention.

Claims

1. An ink circulation device for a printing press, comprising an ink tank (1) and an ink container, wherein one end of the ink tank (1) is connected to an ink outlet pipe (2) and the other end is connected to an ink inlet pipe (3), an oil pump (4) is provided on the ink inlet pipe (3), and the ink container is disposed between the ink outlet pipe (2) and the ink inlet pipe (3), characterized in that, The ink container includes a shell (5) and a stirring component. The stirring component includes a rotating shaft (6), a bearing tube (7), and a drive rod (8). The upper end of the rotating shaft (6) passes through the top plate (33) of the shell (5) and is connected to a motor (10). The lower end of the rotating shaft (6) is provided with a bearing cylinder (9) and is fixedly connected to the inner bottom surface of the bearing cylinder (9). The rotating shaft (6) has ribs (12) arranged on its peripheral wall. The inner wall of the bearing tube (7) is provided with multiple sliding grooves (14) that correspond to the ribs (12), so that the bearing tube (7) slides up and down around the rotating shaft (6). The lower end of the bearing tube (7) extends into the bearing cylinder (9) and is connected to the inner bottom surface of the bearing cylinder (9) by a spring. Spring (13), a bearing ring (15) is fixedly sleeved on the outer side of the upper end of the bearing tube (7), and a semi-cylinder (16) with protrusions facing upward is arranged on the top surface of the bearing ring (15). Multiple stirring blades (17) located below the bearing ring (15) are arranged on the side of the bearing tube (7). A drive rod (8) is fixedly arranged on the lower side of the top plate (33). A ball (19) is provided at the lower end of the drive rod (8) to roll and contact the top surface of the bearing ring (15). The outlet of the oil outlet pipe (2) is connected to the inside of the shell (5). A vertical pipe (22) is provided at the bottom of the shell (5). The vertical pipe (22) is connected to the oil inlet pipe (3). A filter element is provided on the vertical pipe (22). The vertical tube (22) has a circumferential array of strip holes (23); The filter element includes a sleeve (24), a first filter screen (25), and a second filter screen (28). The sleeve (24) is a transparent cylinder with an opening at the top and a fixed sleeve on the vertical pipe (22) at the bottom. The sleeve (24) has multiple strip holes (23) surrounding its periphery. The opening at the top of the sleeve (24) is sealed by a cover plate (29). Each strip hole (23) has a first filter screen (25) in its lower section. The second filter screen (28) is fixedly installed inside the vertical pipe (22). The second filter screen (28) and the first filter screen (25) are connected to form an internal filter structure.

2. The ink circulation device for a printing press according to claim 1, characterized in that, The housing (5) is fixed on the base.

3. The ink circulation device for a printing press according to claim 1, characterized in that, Each of the semi-cylinders (16) is arranged radially along the bearing ring (15), and a plurality of the semi-cylinders (16) are arranged in an equidistant ring array around the pivot (6) on the top surface of the bearing ring (15).

4. The ink circulation device for a printing press according to claim 1, characterized in that, One end of the vertical pipe (22) passes through the bottom plate of the housing (5) and connects to the inside of the housing (5), while the other end connects to the oil inlet pipe (3).

5. The ink circulation device for a printing press according to claim 1, characterized in that, The filter screen (28) is a hollow hemisphere with mesh holes and upward protrusions, and the sleeve (24) is equipped with a cleaning component.

6. The ink circulation device for a printing press according to claim 5, characterized in that, The lower outer wall of the second filter (28) is connected to the upper inner wall of the first filter (25).

7. The ink circulation device for a printing press according to claim 6, characterized in that, The cleaning assembly includes a filter screen (30) and uprights (31). The filter screen (30) is a hollow frustum with openings at the top and bottom and mesh holes on its peripheral walls. The filter screen (30) is fitted over the vertical tube (22) inside the lower part of the sleeve (24). The top surface of the filter screen (30) is fixedly connected to the cover plate (29) via multiple uprights (31).

8. The ink circulation device for a printing press according to claim 7, characterized in that, The upper end of the inner wall of the filter screen three (30) is lower than the upper end of the filter screen one (25) and contacts the outer wall of the vertical tube (22). The lower end of the peripheral wall of the filter screen three (30) contacts the lower end of the inner wall of the sleeve (24).

9. The ink circulation device for a printing press according to claim 6, characterized in that, A valve (32) is provided on the vertical pipe (22) on the upper side of the cover plate (29), and the distance from the cover plate (29) to the valve (32) is greater than the distance from the cover plate (29) to the lower end of the sleeve (24).

10. The ink circulation device for a printing press according to claim 1, characterized in that, The drive rods (8) are set as two and are symmetrically arranged with the pivot (6) as the center. Both drive rods (8) are in a vertical state.

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