Printing plate roller laser engraving blowing system

Abstract

The utility model provides a printing plate roller laser engraving air blowing system which comprises an air pump, an air outlet of the air pump is communicated with an air outlet header pipe, an air outlet of the air outlet header pipe is communicated with a tee joint, one end of the tee joint is communicated with an outer air blowing pipe, and the other end of the tee joint is communicated with an inner air blowing pipe. Air spraying holes are formed in the bottom of the annular pipe at equal intervals, an air outlet of the inner air blowing pipe communicates with an air inlet of the annular pipe, a first control valve is installed on the outer air blowing pipe, a second control valve is installed on the inner air blowing pipe, a dust collecting cover is arranged on one side of the laser engraving head, and a negative pressure opening of the dust collecting cover communicates with a dust collecting pipe. The dust collecting pipe is communicated with an air inlet of the air pump through the filtering assembly; the single air pump is adopted as an air source, and the ingenious design of the air outlet header pipe, the tee joint, the outer air blowing pipe and the inner air blowing pipe is combined, so that reasonable distribution and utilization of airflow are achieved, and the overall energy consumption of the system is effectively reduced through the improvement.

Description

Technical Field

[0001] This utility model relates to the field of laser engraving of printing rollers, specifically to a blowing system for laser engraving of printing rollers. Background Technology

[0002] Chinese Patent No. CN206383634U discloses a laser engraving air blowing system for printing rollers. This air blowing system is used in conjunction with a laser engraving head, which is positioned opposite to the roller to be engraved. The air blowing system includes an external air pump, an external air pipeline control unit connected to the external air pump, an internal air pump, an internal air pipeline control unit connected to the internal air pump, a suction and dust removal unit positioned along the axial direction of the roller to be engraved and opposite to the surface of the roller, and an electrical controller electrically connected to the internal air pump, the external air pipeline control unit, the internal air pump, the internal air pipeline control unit, and the suction and dust removal unit.

[0003] The aforementioned laser engraving air blowing system for printing rollers employs an internal air blowing control unit, blowing air from top to bottom to prevent dust from entering the fixed space of the focusing lens from the engraving opening, thus solving the problem of the mirror getting dirty. It also uses a suction dust removal unit in conjunction with the nozzles of the external air blowing pipe, blowing air from the suction port of the suction pipe towards the printing roller, effectively blowing away the dust deposited on the surface of the printing roller, thus solving the problem of cleaning the roller surface. The air pressure at the laser engraving head of the internal air blowing control unit is greater than the air pressure blown out by the nozzles in the external air blowing control unit, ensuring that the mirror is not secondary contaminated by dust blown up from the outside.

[0004] However, in actual use, the above system uses three devices—an internal air pump, an external air pump, and a suction pump—as the air source and negative pressure source. Although it meets the design requirements in terms of functionality, it has a series of significant drawbacks in practical applications:

[0005] High energy consumption: The three independent pump units each consume electricity, resulting in relatively high energy consumption for the entire system. This increases operating costs for laser engraving equipment that needs to run for extended periods and does not meet modern industrial requirements for energy conservation and emission reduction.

[0006] High maintenance costs: Each pump requires regular maintenance and upkeep, including cleaning nozzles and checking seals, which increases the complexity and cost of maintenance work.

[0007] Large space occupation: Three independent pump units require a certain amount of space for installation and placement. Utility Model Content

[0008] The present invention aims to solve the problems mentioned in the background art by providing a laser engraving air blowing system for printing rollers, which can effectively reduce operating energy consumption.

[0009] The specific technical solution is as follows:

[0010] A laser engraving air blowing system for printing plate rollers is disclosed. The system is used in conjunction with a laser engraving head, which is positioned opposite to the roller to be engraved. The system includes: an air pump; an air outlet connected to a main air pipe; a T-junction connected to the air outlet of the main air pipe; an external air blowing pipe connected to one end of the T-junction; an internal air blowing pipe connected to the other end of the T-junction; an annular tube fitted onto the laser engraving head; air jet holes evenly spaced at the bottom of the annular tube; an air outlet of the internal air blowing pipe connected to an air inlet of the annular tube; a nozzle hinged to the air outlet of the external air blowing pipe for blowing away dust deposited on the surface of the roller to be engraved; a first control valve installed on the external air blowing pipe; a second control valve installed on the internal air blowing pipe; a dust collection hood on one side of the laser engraving head; a dust collection pipe connected to the negative pressure port of the dust collection hood; and a dust collection pipe connected to the air inlet of the air pump via a filter assembly.

[0011] As a preferred embodiment of this utility model, the filter assembly includes a first three-way valve and a second three-way valve. The first three-way valve is installed at the end of the dust collection pipe away from the dust collection hood, and the second three-way valve is installed at the air inlet of the air pump. Filter boxes are installed at the air outlets at both ends of the first three-way valve. The air inlet of the filter box is connected to the air outlet of the first three-way valve, and the air outlet of the filter box is connected to the air inlet of the second three-way valve. A filter screen is provided inside the filter box, and when the filter screen in one filter box becomes clogged, it can be switched to the other filter box in a timely manner.

[0012] As a preferred embodiment of this utility model, it also includes a frequency converter, and the air pump is controlled by the frequency converter.

[0013] As a preferred embodiment of this utility model, a first pressure sensor is installed at the air outlet of the external air blowing pipe, and a second pressure sensor is installed at the air outlet of the internal air blowing pipe.

[0014] As a preferred embodiment of this utility model, it further includes a controller, the signal input terminal of which is electrically connected to the first pressure sensor and the second pressure sensor respectively, the first control valve and the second control valve are both configured as proportional valves, and the first control valve and the second control valve are both controlled by the controller.

[0015] In a preferred embodiment of this utility model, a third pressure sensor is installed inside one of the filter boxes, and a fourth pressure sensor is fixedly installed inside the other filter box. The signal input terminal of the controller is electrically connected to the third pressure sensor and the fourth pressure sensor, respectively. The first three-way valve and the second three-way valve are both controlled by the controller.

[0016] As a preferred embodiment of the present invention, it also includes a loudspeaker, which is controlled by the controller.

[0017] In a preferred embodiment of this utility model, the frequency converter is controlled by the controller.

[0018] This utility model has the following beneficial effects:

[0019] This invention achieves rational distribution and utilization of airflow by using a single air pump as the air source and combining it with the ingenious design of the main air outlet pipe, tee, external air blowing pipe and internal air blowing pipe. This improvement effectively reduces the overall energy consumption of the system. Compared with the original system that uses three independent pump devices, the energy consumption is significantly reduced, the maintenance cost is reduced, which meets the urgent needs of modern industry for energy conservation and emission reduction, helps to reduce the operating costs of enterprises, and effectively reduces the space occupied.

[0020] The single-pump design reduces potential points of equipment failure, lowering the risk of production interruptions due to equipment malfunctions. Furthermore, by introducing a frequency converter to control the pump's speed, the system's stability and reliability can be further improved, ensuring the smooth operation of the laser engraving process.

[0021] By adopting a dual-filter box and three-way valve design, the airflow in the dust collection pipe is filtered, and when the filter screen of one filter box becomes clogged, it can be switched to the other filter box in time to ensure the continuity of operation. Attached Figure Description

[0022] Figure 1 A schematic diagram of the structure of the laser engraving air blowing system for printing plate rollers provided in this embodiment of the utility model;

[0023] Figure 2 A schematic diagram of the filter box of the laser engraving air blowing system for printing plate rollers provided in this embodiment of the utility model;

[0024] Figure 3 A block diagram illustrating the control principle of the laser engraving air blowing system for printing plate rollers provided in this embodiment of the utility model.

[0025] In the diagram: 1. Air pump; 2. Main air outlet pipe; 3. External air blowing pipe; 301. First control valve; 302. First pressure sensor; 4. Internal air blowing pipe; 401. Second control valve; 402. Second pressure sensor; 403. Ring pipe; 5. Nozzle; 6. Laser engraving head; 7. Focusing lens; 8. Roller to be engraved; 9. Dust collection hood; 10. Dust collection pipe; 11. First three-way valve; 12. First Y-shaped pipe; 13. Second Y-shaped pipe; 14. Filter box; 1401. Air outlet; 1402. Air inlet; 1403. Filter screen; 1404. Third pressure sensor; 1405. Fourth pressure sensor; 15. Second three-way valve; 16. Frequency converter; 17. Controller; 18. Speaker. Detailed Implementation

[0026] The technical solution of this utility model will be further described below with reference to the accompanying drawings and specific embodiments.

[0027] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images. They should not be construed as limiting the scope of this patent. To better illustrate the embodiments of this utility model, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0028] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "inner," and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0029] In the description of this utility model, unless otherwise explicitly specified and limited, the term "connection" or similar designation indicating the connection relationship between components should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral part; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0030] like Figures 1-3This utility model provides a laser engraving air blowing system for printing plate rollers. The system works in conjunction with a laser engraving head 6, which is positioned opposite to the printing plate roller 8 to be engraved. The system includes an air pump 1, with a main air outlet 2 connected to the air pump 1's outlet. A tee is connected to the outlet of the main air outlet 2, with one end of the tee connected to an external air blowing pipe 3 and the other end connected to an internal air blowing pipe 4. The pressure at the outlet of the internal air blowing pipe 4 is higher than that at the outlet of the external air blowing pipe 3 to prevent dust from entering the focusing lens 7. The air pump 1 serves as the system's sole air source, supplying air to the main air outlet 2 through its outlet. The main air outlet 2 acts as the main channel for airflow distribution, directing airflow to different working areas. An annular tube 403 is fitted onto the laser engraving head 6. Air jet holes are equidistantly opened at the bottom of the annular tube 403. The air outlet of the inner air blowing pipe 4 is connected to the air inlet of the annular tube 403. The annular tube 403 blows air from top to bottom onto the laser engraving head 6 to prevent dust from entering the focusing lens 7. A second control valve 401 is installed on the inner air blowing pipe 4. The second control valve 401 is a proportional valve used to control the airflow intensity blown towards the vicinity of the laser engraving head 6. The air outlet of the outer air blowing pipe 3 is hinged to a nozzle 5 for blowing away the dust deposited on the surface of the roller to be engraved 8. The nozzle 5 blows air from the direction of the engraving roller 8 towards the dust collection hood 9, effectively blowing away the dust deposited on the surface of the roller to be engraved 8. A first control valve 301 is installed on the outer air blowing pipe 3 to control the airflow intensity blown towards the surface of the roller to be engraved 8. The first control valve 301 is a proportional valve and can adjust the airflow size as needed.

[0031] A dust collection hood 9 is installed on one side of the laser engraving head 6. The negative pressure port of the dust collection hood 9 is connected to a dust collection pipe 10. The dust collection pipe 10 is connected to the air inlet of the air pump 1 through a filter assembly. The filter assembly includes a first three-way valve 11 and a second three-way valve 15. The first three-way valve 11 is installed at the end of the dust collection pipe 10 away from the dust collection hood 9, and the second three-way valve 15 is installed at the air inlet of the air pump 1. Filter boxes 14 are installed at the air outlets at both ends of the first three-way valve 11. The air inlet 1402 of the filter box 14 is connected to the air outlet of the first three-way valve 11, and the air outlet 1401 of the filter box 14 is connected to the air inlet of the second three-way valve 15. A filter screen 1403 is installed inside the filter box 14. By controlling the operation of the first three-way valve 11 and the second three-way valve 15, the airflow switching and filtration can be realized. When the filter screen 1403 in one of the filter boxes 14 becomes clogged, the flow can be switched to the other filter box 14 by controlling the operation of the first three-way valve 11 and the second three-way valve 15 to ensure continuous airflow.

[0032] To facilitate real-time monitoring of the air outlet pressures of the inner air pipe 4 and the outer air pipe 3, a first pressure sensor 302 is installed at the air outlet of the outer air pipe 3, and a second pressure sensor 402 is installed at the air outlet of the second control valve 401.

[0033] To facilitate automatic operation, a controller 17 is provided. The signal input terminals of the controller 17 are electrically connected to the first pressure sensor 302 and the second pressure sensor 402, respectively. The first control valve 301 and the second control valve 401 are both controlled by the controller 17. The first pressure sensor 302 and the second pressure sensor 402 transmit signals to the controller 17. Then, the controller 17 compares the set air outlet pressures of the external air pipe 3 and the internal air pipe 4 with the data transmitted by the first pressure sensor 302 and the second pressure sensor 402. When the pressure exceeds or falls below the threshold, the controller 17 controls the first control valve 301 and the second control valve 401 to act, and adjusts the air outlet pressures of the external air pipe 3 and the internal air pipe 4 in a timely manner. The frequency converter 16 is controlled by the controller 17 and is used to adjust the output power of the air pump 1 to achieve precise airflow control.

[0034] Each filter box 14 is equipped with a third pressure sensor 1404 and a fourth pressure sensor 1405, which are used to monitor the clogging of the filter screen 1403 and feed the signal back to the controller 17. The first three-way valve 11 and the second three-way valve 15 are both controlled by the controller 17.

[0035] For example, when the third pressure sensor 1404 detects that the pressure exceeds the set threshold, the controller 17 controls the first three-way valve 11 and the second three-way valve 15 to switch to another filter box 14 for filtration.

[0036] To facilitate reminders to staff, a speaker 18 is also installed. The speaker 18 is controlled by the controller 17. The controller 17 will trigger the speaker 18 to sound an alarm, reminding the operator to deal with the clogged filter 1403.

[0037] It should be noted that the specific models of the controller 17, the first pressure sensor 302, the second pressure sensor 402, the third pressure sensor 1404, and the fourth pressure sensor 1405 in this embodiment are not limited, as long as they meet the operational requirements of this system.

[0038] The above are merely preferred embodiments of the present utility model and are not intended to limit the implementation methods and protection scope of the present utility model. Those skilled in the art should realize that any equivalent substitutions and obvious changes made based on the description and illustrations of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser engraving air blowing system for printing plate rollers, characterized in that, The laser engraving air blowing system for the printing plate roller is used in conjunction with the laser engraving head (6). The laser engraving head (6) is positioned opposite to the printing plate roller (8) to be engraved. The laser engraving air blowing system for the printing plate roller includes: an air pump (1), an air outlet manifold (2) connected to the air outlet of the air pump (1), a tee connected to the air outlet of the air outlet manifold (2), an external air blowing pipe (3) connected to one end of the tee, an internal air blowing pipe (4) connected to the other end of the tee, and an annular tube (403) sleeved on the laser engraving head (6). Air jet holes are equidistantly opened at the bottom of the annular tube (403). The outlet of the inner air pipe (4) is connected to the inlet of the annular pipe (403). The outlet of the outer air pipe (3) is hinged with a nozzle (5) for blowing away the dust deposited on the surface of the roller to be engraved (8). A first control valve (301) is installed on the outer air pipe (3). A second control valve (401) is installed on the inner air pipe (4). A dust collection hood (9) is provided on one side of the laser engraving head (6). The negative pressure port of the dust collection hood (9) is connected to a dust collection pipe (10). The dust collection pipe (10) is connected to the inlet of the air pump (1) through a filter assembly.

2. The laser engraving air blowing system for printing plate rollers according to claim 1, characterized in that, The filter assembly includes a first three-way valve (11) and a second three-way valve (15). The first three-way valve (11) is installed at the end of the dust collection pipe (10) away from the dust collection hood (9). The second three-way valve (15) is installed at the air inlet of the air pump (1). Filter boxes (14) are installed at the air outlets at both ends of the first three-way valve (11). The air inlet (1402) of the filter box (14) is connected to the air outlet of the first three-way valve (11). The air outlet (1401) of the filter box (14) is connected to the air inlet of the second three-way valve (15). A filter screen (1403) is provided inside the filter box (14).

3. The printing plate roller laser engraving air blowing system according to claim 2, characterized in that, It also includes a frequency converter (16), and the air pump (1) is controlled by the frequency converter (16).

4. The printing plate roller laser engraving air blowing system according to claim 3, characterized in that, A first pressure sensor (302) is installed at the outlet of the external air blowing pipe (3), and a second pressure sensor (402) is installed at the outlet of the internal air blowing pipe (4).

5. The laser engraving air blowing system for printing plate rollers according to claim 4, characterized in that, It also includes a controller (17), the signal input terminal of which is electrically connected to the first pressure sensor (302) and the second pressure sensor (402) respectively. The first control valve (301) and the second control valve (401) are both configured as proportional valves, and the first control valve (301) and the second control valve (401) are both controlled by the controller (17).

6. The laser engraving air blowing system for printing rollers according to claim 5, characterized in that, One of the filter boxes (14) is equipped with a third pressure sensor (1404), and the other filter box (14) is fixedly equipped with a fourth pressure sensor (1405). The signal input terminal of the controller (17) is electrically connected to the third pressure sensor (1404) and the fourth pressure sensor (1405) respectively. The first three-way valve (11) and the second three-way valve (15) are both controlled by the controller (17).

7. The laser engraving air blowing system for printing plate rollers according to claim 6, characterized in that, It also includes a speaker (18) which is controlled by the controller (17).

8. The laser engraving air blowing system for printing plate rollers according to claim 5, characterized in that, The frequency converter (16) is controlled by the controller (17).

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