Centralized supercharging equipment of gravure press

Abstract

The utility model provides centralized supercharging equipment of a gravure press. The centralized supercharging equipment comprises an air compressor, an air storage tank and an air dryer, an air inlet of the air compressor is communicated with an air source, and an air outlet of the air compressor is communicated with an air inlet of the air storage tank through a pipeline; an air outlet of the air storage tank is communicated with an air inlet of the air dryer through a first pipeline; an air outlet of the air dryer communicates with an air outlet pipe, and the air outlet pipe communicates with air inlet pipes of all printing units in the intaglio printing press. Compared with the prior art, the centralized supercharging device of the intaglio printing press has the advantages that the maintenance cost can be reduced, and the negative influence on the environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to a centralized pressurization device for a gravure printing machine. Background Art

[0002] A gravure printing machine is a printing device widely used in the field of packaging printing. It uses gravure printing technology and is mainly applicable to printing high-quality products such as packaging materials, banknotes, stamps, credit cards, and anti-counterfeiting labels.

[0003] In the existing gravure printing machines, the printing units need to adopt a secondary pressurization method as the power source for the fastening of the printing plates of each unit and the installation and disassembly of the impression cylinders during the production process. As Figure 1 shown, the principle of secondary pressurization is as follows: The compressed air output by the workshop air compressor at 8 bar is respectively connected to the booster pumps set in the eight groups of printing units of the gravure printing machine, and then the pressure is respectively increased to 15 - 18 bar by these eight booster pumps to meet the production requirements.

[0004] However, in the prior art, a separate booster pump needs to be set for each printing unit for pressurization. The existing pressurization method has the following problems: 1. Air itself contains humidity and a certain amount of moisture. Although the air has been dried in the air compressor and the number of water molecules it contains has decreased, during the gas transmission process, when the temperature inside the air pipe is quite different from the external environment temperature, a large amount of moisture will still be generated, resulting in water accumulation in the air pipe. 2. The secondary pressurization system has poor stability, the booster pumps have a high failure frequency, and the compressed air containing an oil-water mixture often corrodes and damages the plate clamps, resulting in high annual replacement costs of accessories for the booster pumps and the plate clamps, and long maintenance time. 3. The booster pumps will discharge gases containing an oil-water mixture during operation, causing environmental pollution, and workers inhaling the gases containing an oil-water mixture for a long time will cause damage to the respiratory system and the nervous system. Summary of the Utility Model

[0005] Aiming at the technical problems in the existing gravure printing machines that the air pipes are prone to water accumulation, each printing unit uses a separate booster pump for pressurization, resulting in high maintenance costs, easy pollution of the factory environment, and damage to the workers' bodies. The utility model provides a centralized pressurization device for a gravure printing machine, which pressurizes the gas source by using a set of equipment and then is respectively connected to each printing unit through pipelines to provide the gas with the required pressure to each printing unit, reducing the number of booster pumps used, thereby reducing the maintenance cost, and at the same time reducing the pollution of the factory environment and avoiding damage to the workers' bodies. And an air dryer is provided in the centralized pressurization device for the gravure printing machine, so that most of the water vapor can be removed, and the water content in the compressed air can be reduced to the required range to avoid water accumulation in the air pipes.

[0006] A centralized supercharging device for an intaglio printing press, which includes an air compressor, a gas storage tank, and an air dryer;

[0007] The air inlet of the air compressor is communicated with the air source, and the air outlet is communicated with the air inlet of the gas storage tank through a pipeline;

[0008] The air outlet of the gas storage tank is communicated with the air inlet of the air dryer through a first pipeline;

[0009] The air outlet of the air dryer is communicated with an outlet pipe, and the outlet pipe is respectively communicated with the inlet pipes of each printing unit in the intaglio printing press.

[0010] Preferably, a first on-off control valve is arranged on the first pipeline;

[0011] The centralized supercharging device of the intaglio printing press further includes a spare air pipe, the spare air pipe is respectively communicated with the first pipeline and the outlet pipe, and the connection position of the spare air pipe and the first pipeline is located on the front side of the first on-off control valve, and a second on-off control valve is arranged on the spare air pipe.

[0012] Preferably, a third on-off control valve is arranged on the outlet pipe, and the first on-off control valve, the second on-off control valve, and the third on-off control valve all adopt ball valves.

[0013] Preferably, a first filter is arranged on the first pipeline.

[0014] Preferably, a second filter is arranged on the outlet pipe.

[0015] Preferably, pressure gauges are respectively arranged on the first pipeline and the outlet pipe.

[0016] Preferably, drain ports are respectively arranged at the bottoms of the gas storage tank, the air dryer, the first filter, and the second filter.

[0017] Preferably, a pressure gauge and a safety valve are arranged on the gas storage tank.

[0018] Preferably, a silencer is arranged on the air compressor.

[0019] Preferably, the air dryer is a cold dryer.

[0020] Compared with the prior art, the centralized supercharging device of the gravure printing machine provided by the utility model includes an air compressor, an air storage tank, and an air dryer; the air inlet of the air compressor is communicated with the air source, and the air outlet is communicated with the air inlet of the air storage tank through a pipeline; the air outlet of the air storage tank is communicated with the air inlet of the air dryer through a first pipeline; the air outlet of the air dryer is communicated with an air outlet pipe, and the air outlet pipe is respectively communicated with the air inlet pipes of the respective printing units in the gravure printing machine. In the centralized supercharging device of the gravure printing machine, the air source is supercharged by one air compressor and then respectively delivered to each printing unit. The air source is supercharged in a centralized supercharging manner, reducing the number of supercharging devices, thereby reducing the maintenance cost, and also reducing the pollution to the factory environment and avoiding damage to the workers' bodies. At the same time, most of the water vapor in the supercharged compressed air can be removed by the air dryer, and the water content in the compressed air is reduced to the required range, which can better avoid water accumulation in the air pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the principle of supercharging a gravure printing machine in the prior art;

[0023] Figure 2 It is a schematic structural diagram of a centralized supercharging device for a gravure printing machine provided by an embodiment;

[0024] Figure 3 It is a schematic diagram of the air circuit structure of a gravure printing machine provided by an embodiment. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present application.

[0026] It should be noted that when a component is referred to as "fixed to", "mounted on", or "disposed on" another component, it can be directly on the other component or indirectly disposed on the other component; when a component is "connected" to another component, or a component is referred to as "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component.

[0027] It should be understood that the orientation or positional relationship indicated by terms such as "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0028] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, the meaning of "a plurality of" and "several" is two or more, unless otherwise specifically defined.

[0029] It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those familiar with this technology to understand and read, and are not used to limit the conditions under which the present application can be implemented. Therefore, they do not have a substantial technical meaning. Any modification of the structure, change in the ratio relationship, or adjustment of the size, without affecting the efficacy that the present application can produce and the purpose that can be achieved, should still fall within the scope covered by the technical content disclosed in the present application.

[0030] The present utility model provides a centralized supercharging device for a gravure printing machine, which includes an air compressor, a gas storage tank, and an air dryer; the air inlet of the air compressor is communicated with a gas source, and the air outlet is communicated with the air inlet of the gas storage tank through a pipeline; the air inlet of the gas storage tank is communicated with the air inlet of the air dryer through a first pipeline; the air outlet of the air dryer is communicated with an outlet pipe, and the outlet pipe is respectively communicated with the inlet pipes of each printing unit in the gravure printing machine. In the centralized supercharging device of the gravure printing machine, after the gas source is supercharged by one air compressor and then respectively transported to each printing unit, the gas source is supercharged in a centralized supercharging manner, reducing the number of supercharging devices, thereby reducing the maintenance cost, and also reducing the pollution to the factory environment and avoiding damage to the workers' bodies. At the same time, most of the water vapor in the compressed air after supercharging can be removed by the air dryer, and the water content in the compressed air is reduced to the required range, which can better avoid water accumulation in the air pipes.

[0031] Please refer to Figure 2 and Figure 3 This embodiment provides a centralized supercharging device 100 for a gravure printing machine, which is mainly used to solve the technical problems in the prior art that multiple independent supercharging pumps are required for supercharging, resulting in high maintenance costs and great negative impacts on the environment.

[0032] The centralized supercharging device 100 for the gravure printing machine includes an air compressor 10, a gas storage tank 20, and an air dryer 30. The air inlet of the air compressor 10 is communicated with a gas source (which can be an air compressor), and the air outlet of the air compressor 10 is communicated with the air inlet of the gas storage tank 20 through a pipeline. The air outlet of the gas storage tank 20 is communicated with the air inlet of the air dryer 30 through a first pipeline 40. The air outlet of the air dryer 30 is communicated with an outlet pipe 50, and the outlet pipe 50 is respectively communicated with the inlet pipes 200 of each printing unit in the gravure printing machine.

[0033] After the air provided by the gas source enters the air compressor 10, it is supercharged by the air compressor 10, and then the compressed air is sent into the gas storage tank 20. Then the compressed air enters the air dryer 30 for drying, and finally is respectively transported to each inlet pipe 200 through the outlet pipe 50, so as to be respectively sent into each printing unit to provide the required pressure for each printing unit.

[0034] It is understandable that the prior art uses multiple booster pumps for secondary boosting, and each printing unit corresponds to a separate booster pump. The system has poor stability, the booster pump has a high failure frequency, and the compressed air containing an oil-water mixture often causes the plate chuck to rust and damage, resulting in high annual parts replacement costs for the booster pump and the plate chuck, and long maintenance time. Taking the gravure printing machine used by the applicant as an example, there are eight groups of printing units in the gravure printing machine, and eight booster pumps are used. The annual parts replacement cost is more than 300,000 yuan, and the downtime loss is more than 90 hours. In addition, the operation of multiple booster pumps is also likely to affect the factory environment and cause damage to the workers. Moreover, in the existing boosting structure, the air pipe is also very prone to water accumulation.

[0035] The centralized pressurizing device 100 of the gravure printing machine provided in this embodiment adopts a centralized pressurizing method, and the air source is pressurized as a whole by an air compressor 10, and then the air is respectively transported to the air inlet pipe 200 of each printing unit by the air outlet pipe 50, thereby reducing the number of pressurizing devices, thereby reducing the frequency of failures and reducing maintenance costs. At the same time, due to the reduction in the number of pressurizing devices, the pollution to the factory environment is also reduced, avoiding damage to the workers' bodies. In addition, the air dryer 30 is provided in the centralized pressurizing device 100, so that the compressed air can be dried to better avoid water accumulation in the air pipe.

[0036] The air compressor 10 may be an air compressor with a maximum compression pressure of 20 bar for pressurization.

[0037] In one embodiment, the working principle of the centralized pressurizing device 100 of the gravure printing machine is as follows: the 8-bar compressed air delivered by the air compressor is compressed twice by the air compressor 10, and the 8-bar compressed air is compressed to 20 bar and output to the air tank 20. The design pressure of the air tank 20 is usually planned to be between 20% and 30% of the intake pressure, which plays a buffering role for the unstable compressed air entering the air tank 20. When the 20-bar compressed air enters the air tank 20, the high-speed airflow will hit the tank wall of the air tank 20 to generate confluence, and the temperature in the air tank 20 will drop rapidly, so that the water vapor can be liquefied, and some water and oil can be removed. After the pressure and temperature are stable, it will be delivered to the air dryer 30. Finally, the air dryer 30 removes most of the water vapor in the compressed air and reduces the water content in the compressed air to a required range. Secondly, the oil mist and oil vapor in the compressed air are condensed. The compressed air is then discharged from the air dryer 30 and transported to the air inlet pipe 200 of each printing unit through the air outlet pipe 50, thereby providing compressed air of the required pressure to each printing unit.

[0038] Preferably, in one embodiment, a first on-off control valve 41 is provided on the first pipeline 40. The centralized supercharging device 100 of the gravure press further includes a spare air pipe 60, which is respectively connected to the first pipeline 40 and the air outlet pipe 50. The connection position of the spare air pipe 60 and the first pipeline 40 is located on the front side of the first on-off control valve 41, and a second on-off control valve 61 is provided on the spare air pipe 60. When the air dryer 30 is damaged, compressed air with the required pressure can continue to be provided to each printing unit through the spare air pipe 60. For example, when the air dryer 30 is damaged, the first on-off control valve 41 can be closed, and the second on-off control valve 61 can be opened, so that the compressed air flowing out of the air storage tank 20 can directly flow into the air outlet pipe 50 through the spare air pipe 60 and be delivered to each printing unit by direct delivery. When the air dryer 30 is operating normally, the second on-off control valve 61 can be closed.

[0039] Preferably, in one embodiment, a third on-off control valve 51 is provided on the air outlet pipe 50. The first on-off control valve 41, the second on-off control valve 61, and the third on-off control valve 51 all adopt ball valves, making the operation more convenient and having good sealing performance.

[0040] Preferably, in one embodiment, a first filter 42 is provided on the first pipeline 40. The first filter 42 is used to filter out possible pipeline rust and fine particles. It can be understood that since the compressed air input into the air dryer 30 has been preliminarily filtered by the air storage tank 20 (filtering out part of the moisture and oil generated by compression) and secondary filtered by the first filter 42 (filtering out possible pipeline rust and fine particles), the working efficiency of the air dryer 30 will not be affected, and the risk of damaging the air dryer 30 is eliminated. Specifically, the first filter 42 can adopt a small (small volume) filter to reduce the required occupied space.

[0041] Preferably, in one embodiment, a second filter 52 is provided on the air outlet pipe 50. The second filter 52 is used to filter out the fine particles condensed by the air dryer 30 in the compressed air. Specifically, the second filter 52 can also adopt a small (small volume) filter to reduce the required occupied space.

[0042] Preferably, in one embodiment, pressure gauges are respectively arranged on the first pipeline 40 and the air outlet pipe 50, so that the air pressure in the pipeline can be detected. More preferably, in one embodiment, the pressure gauge on the first pipeline 40 is arranged on the first filter 42, that is, the first filter 42 is a filter with a pressure gauge. The pressure gauge on the second pipeline 50 is arranged on the second filter 52, that is, the second filter 52 is a filter with a pressure gauge.

[0043] Preferably, in one embodiment, drain outlets are respectively arranged at the bottoms of the air storage tank 20, the air dryer 30, the first filter 42 and the second filter 52, which is beneficial to the discharge of moisture.

[0044] Preferably, in one embodiment, a pressure gauge 21 and a safety valve 22 are arranged on the air storage tank 20, so as to better improve safety.

[0045] Preferably, in one embodiment, a silencer 11 is arranged on the air compressor 10, so that the noise generated during operation can be reduced, the impact on the factory environment can be reduced, and the physical damage to workers can be avoided.

[0046] Preferably, in one embodiment, the air dryer 30 is a cold dryer, which has the characteristics of low noise, stable and reliable, high energy efficiency, and simple maintenance.

[0047] Preferably, in one embodiment, the air compressor 10 is arranged on a bracket 70, so as to better prevent the air compressor 10 from being affected by moisture. More preferably, the air dryer 30 is also supported by a bracket.

[0048] The above are only the implementation manners of the present invention. It should be noted here that for those of ordinary skill in the art, improvements can be made without departing from the creative concept of the present invention, but these all belong to the protection scope of the present invention.

Claims

1. A centralized pressurization device for an intaglio printing press, characterized in that, It includes an air compressor, an air storage tank, and an air dryer; The air inlet of the air compressor is communicated with the air source, and the air outlet is communicated with the air inlet of the air storage tank through a pipeline; The air outlet of the air storage tank is communicated with the air inlet of the air dryer through a first pipeline; The air outlet of the air dryer is communicated with an outlet pipe, and the outlet pipe is respectively communicated with the inlet pipes of the respective printing units in the gravure printing machine.

2. The centralized supercharging device of the gravure printing machine according to claim 1, characterized in that A first on-off control valve is arranged on the first pipeline; The centralized pressurization device of the gravure printing machine further includes a standby air pipe, the standby air pipe is respectively communicated with the first pipeline and the outlet pipe, and the connection position of the standby air pipe and the first pipeline is located on the front side of the first on-off control valve, and a second on-off control valve is arranged on the standby air pipe.

3. The centralized supercharging device for the intaglio printing machine according to claim 2, characterized in that, A third on-off control valve is arranged on the outlet pipe, and the first on-off control valve, the second on-off control valve, and the third on-off control valve all adopt ball valves.

4. The centralized supercharging device of the gravure printing machine according to claim 1, characterized in that, A first filter is arranged on the first pipeline; 5. The centralized supercharging device of the gravure printing machine according to claim 4, characterized in that, A second filter is arranged on the outlet pipe; 6. The centralized supercharging device of the gravure printing machine according to claim 5, characterized in that, Pressure gauges are respectively arranged on the first pipeline and the outlet pipe; 7. The centralized supercharging device of the gravure printing machine according to claim 5, characterized in that, Drainage ports are respectively arranged at the bottoms of the air storage tank, the air dryer, the first filter, and the second filter; 8. The centralized supercharging device of the gravure printing machine according to claim 1, wherein A pressure gauge and a safety valve are arranged on the air storage tank; 9. The centralized supercharging device of the gravure printing machine according to claim 1, characterized in that, A silencer is arranged on the air compressor; 10. The centralized supercharging device of the gravure printing machine according to claim 1, characterized in that, The air dryer is a cold dryer.

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