Energy-saving exhaust system for printing machine

Abstract

The utility model discloses an energy-saving exhaust system for a printing machine. The printing machine comprises a printing unit, a glazing unit, a drying unit, a paper collecting unit, a UV air pump unit and an infrared control cabinet unit. The energy-saving air exhaust system comprises a first air exhaust pipeline in fluid communication with the drying unit, a second air exhaust pipeline in fluid communication with the paper collecting unit, a third air exhaust pipeline in fluid communication with the infrared control cabinet unit, a fourth air exhaust pipeline in fluid communication with the UV air pump unit and four air exhaust fans arranged in airflow paths of the air exhaust pipelines. The four temperature controllers are arranged at the positions of the drying unit, the paper collecting unit, the infrared control cabinet unit and the UV air pump unit respectively, the air exhaust control unit comprises four manual-automatic integrated frequency converters, and the four manual-automatic integrated frequency converters are electrically connected with the four air exhaust fans in a one-to-one mode; each of the four manual-automatic integrated frequency converters is configured to be capable of adjusting the rotating speed of a motor of the corresponding air exhaust fan by changing the output frequency.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, and particularly relates to an exhaust system for a printing press. Background Art

[0002] As an important production equipment in the printing industry, printing presses are widely used in fields such as packaging printing, label printing, and commercial printing. During the printing process, in order to ensure the drying of printed products, methods such as hot air, infrared, and UV are used for drying, which will inevitably generate a large amount of heat and waste gas. In order to quickly discharge the heat and waste gas, printing presses are equipped with exhaust systems.

[0003] The exhaust system of a printing press usually consists of an exhaust duct, an air extraction fan, and a gas purification device. The air extraction fan guides the heat and waste gas generated during production to the gas purification device outdoors through the exhaust duct for purification and then discharges them.

[0004] In the prior art, a set of exhaust system usually only has one high-power air extraction fan. After starting the air extraction fan, airflow is generated by the rotation of the impeller, and the heat or waste gas generated at various parts of the printing press is simultaneously sucked into the exhaust duct. And during the process of discharging the heat and waste gas, the extraction fan always operates at the rated power; however, due to the different flow rates and generation times of the heat or waste gas generated at various parts of the printing press, this will likely cause power waste during the operation of the high-power air extraction fan, which is not conducive to energy conservation. Summary of the Utility Model

[0005] In order to solve the above technical problems, the purpose of the utility model is to provide an energy-saving exhaust system for a printing press that can effectively save energy.

[0006] To this end, the utility model provides an energy-saving exhaust system for a printing press. The printing press includes a printing unit composed of multiple printing color groups, a varnishing unit composed of one or more varnishing groups, a drying unit composed of a UV drying module, a hot air drying module, and an infrared drying module, a UV air pump unit for cooling the UV drying module, a sheet delivery unit, a paper conveying line, and an infrared control cabinet unit for controlling the operation of the infrared drying module; the printing unit, the varnishing unit, the drying unit, and the sheet delivery unit are arranged in sequence along the paper transmission direction, and the paper conveying line passes through the printing unit, the varnishing unit, the drying unit, and the sheet delivery unit in sequence; the energy-saving exhaust system includes:

[0007] An exhaust duct assembly, comprising a first exhaust duct in fluid communication with the drying unit, a second exhaust duct in fluid communication with the sheet receiving unit, a third exhaust duct in fluid communication with the infrared control cabinet unit, and a fourth exhaust duct in fluid communication with the UV air pump unit;

[0008] Four exhaust fans, respectively disposed in the air flow paths of the first exhaust duct, the second exhaust duct, the third exhaust duct, and the fourth exhaust duct;

[0009] A temperature control unit, comprising four temperature controllers respectively arranged at the drying unit, the sheet receiving unit, the infrared control cabinet unit, and the UV air pump unit; and

[0010] An exhaust control unit, comprising four manual-automatic integrated frequency converters, four manual gear selectors, and four manual speed regulators. The four manual-automatic integrated frequency converters are respectively electrically connected to the four exhaust fans one by one. Each of the manual-automatic integrated frequency converters is configured to be able to adjust the motor speed of the corresponding exhaust fan by changing the output frequency. The plurality of temperature controllers can be respectively electrically connected to each of the manual-automatic integrated frequency converters. Each of the manual-automatic integrated frequency converters is configured to automatically adjust its output frequency according to a control instruction from the corresponding temperature controller. The four manual speed regulators are electrically connected to the four manual-automatic integrated frequency converters one by one for an operator to manually select the output frequency of the corresponding manual-automatic integrated frequency converter. Wherein, each of the manual gear selectors is configured to allow the operator to freely switch between a manual speed regulation gear, an automatic speed regulation gear, and a stop gear. When switched to the manual speed regulation gear, the corresponding temperature controller is disconnected from the corresponding manual-automatic integrated frequency converter, and the corresponding manual speed regulator is electrically connected to the corresponding manual-automatic integrated frequency converter. When switched to the automatic speed regulation gear, the corresponding temperature controller is electrically connected to the corresponding manual-automatic integrated frequency converter, and the corresponding manual speed regulator is disconnected from the corresponding manual-automatic integrated frequency converter. When switched to the stop gear, the corresponding manual-automatic integrated frequency converter and the corresponding exhaust fan are shut down.

[0011] According to an embodiment of the present invention, temperature displays for displaying the internal temperatures of the respective units or units are respectively provided at the drying unit, the sheet receiving unit, the infrared control cabinet unit, and the UV air pump unit for the operator.

[0012] According to an embodiment of the present utility model, the drying unit includes an infrared drying module, a hot air drying module, and a UV drying module that are sequentially arranged along the paper transmission direction. The first exhaust duct includes a first connecting pipe and a second connecting pipe that are respectively in fluid communication with the drying unit, and the first connecting pipe and the second connecting pipe are sequentially arranged along the paper transmission direction.

[0013] According to an embodiment of the present utility model, the paper receiving unit includes a first paper receiving unit group and a second paper receiving unit group that are sequentially arranged along the paper transmission direction. The second exhaust duct includes a third connecting pipe and a fourth connecting pipe that are respectively in fluid communication with the first paper receiving unit group and the second paper receiving unit group, and the third connecting pipe and the fourth connecting pipe are sequentially arranged along the paper transmission direction.

[0014] According to an embodiment of the present utility model, the exhaust system further includes: a gas treatment unit, and the first exhaust duct, the second exhaust duct, the third exhaust duct, and the fourth exhaust duct are all in fluid communication with the gas treatment unit.

[0015] Compared with the prior art, the beneficial effects of the present utility model are as follows: The energy-saving exhaust system of the present utility model is provided with a manual-automatic integrated frequency converter that can change the rotation speed of an exhaust fan for each exhaust duct in fluid communication with each working unit. It can realize the manual, automatic, and shutdown adjustment of the rotation speed of each exhaust fan through the manual-automatic integrated frequency converter, so as to ensure that the exhaust system can always operate with low energy consumption. Brief Description of the Drawings

[0016] Figure 1 is a top view schematic diagram of a printing machine according to an embodiment of the present utility model;

[0017] Figure 2 is a front view schematic diagram of a printing machine according to an embodiment of the present utility model;

[0018] Figure 3 is a schematic diagram of the principle of an energy-saving exhaust system for a printing machine according to an embodiment of the present utility model. Detailed Embodiments

[0019] It is easily understood that according to the technical solution of the present utility model, without changing the essence of the present utility model, those of ordinary skill in the art can propose various interchangeable structural forms and implementation methods. Therefore, the following detailed embodiments and the drawings are only illustrative descriptions of the technical solution of the present utility model, and should not be regarded as the whole of the present utility model or as a limitation or restriction on the technical solution of the present utility model.

[0020] This application provides an energy-saving exhaust system for a printing press. The printing press 100 includes a printing unit 1, a varnishing unit 2, a drying unit 3, a sheet collecting unit 4, a UV air pump unit 5, a paper conveying pipeline 6, and an infrared control cabinet unit 7. The paper conveying pipeline 6 sequentially passes through the printing unit 1, the varnishing unit 2, the drying unit 3, and the sheet collecting unit 4. The printing press 100 can quickly and efficiently perform pattern printing on the surface of packaging paper. The energy-saving exhaust system 800 is provided in a supporting manner with the printing press 100, and can transfer the excess heat and waste gas generated by the printing press 100 as needed.

[0021] As the core component unit of the printing press, the printing unit 1 realizes the function of printing ink on paper. In this example, the printing unit 1 is provided with seven printing color groups 11, and each printing color group 11 can undertake printing of different colors. The seven printing color groups 11 are sequentially arranged along the paper conveying direction.

[0022] The varnishing unit 2 is provided with 1 varnishing group 21, which can coat varnish on the surface of the printed paper, and is arranged downstream of the printing unit 1.

[0023] The drying unit 3 has an infrared drying module 31, a hot air drying module 32, and a UV drying module 33. The paper after ink printing and / or varnishing can be dried after passing through the drying unit 3. The infrared drying module 31, the hot air drying module 32, and the UV drying module 33 are sequentially arranged along the paper conveying direction within the casing 30 of the drying unit 3. In some embodiments, the infrared drying module 31, the hot air drying module 32, and the UV drying module 33 can be selected by the printing operator for application.

[0024] The sheet collecting unit 4 can collect the dried paper. In the embodiment of this application, the sheet unit 4 has a first sheet collecting unit 41 and a second sheet collecting unit 42. The first sheet collecting unit 41 and the second sheet collecting unit 42 are sequentially arranged along the paper transmission direction. The sheet collecting unit 4 is provided with two sheet collecting units, which can facilitate the classified collection of the printed paper. For example, an on-line inspection module (not shown in the figure) is provided at the first sheet collecting unit 41. The paper identified as printed qualified by the on-line inspection module is collected at the first sheet collecting unit 41, while the paper identified as printed unqualified is transferred to the second sheet collecting unit 42 for collection.

[0025] The UV air pump unit 5 includes 3 air pumps that convey cooling air to the UV drying module 33. The UV air pump unit 5 is used to cool the UV drying module 33 of the drying unit to ensure the normal temperature of the UV drying module 33.

[0026] The paper conveying pipeline 6 is designed to convey the paper sequentially along the printing unit 1, the varnishing unit 2, the drying unit 3, and the sheet collecting unit 4.

[0027] The infrared control cabinet unit 7 is used to control the operation of the infrared drying module 31.

[0028] As Figure 3 shown, the energy-saving exhaust system 800 includes an exhaust duct assembly 81, a first exhaust fan 82, a second exhaust fan 83, a third exhaust fan 84, a fourth exhaust fan 85, a temperature control unit, and an exhaust control unit 86.

[0029] The exhaust duct assembly 81 includes a first exhaust duct 811 in fluid communication with the drying unit 3, a second exhaust duct 812 in fluid communication with the sheet receiving unit 4, a third exhaust duct 813 in fluid communication with the infrared control cabinet unit 7, and a fourth exhaust duct 814 in fluid communication with the UV air pump unit 5. The first exhaust fan 82, the second exhaust fan 83, the third exhaust fan 84, and the fourth exhaust fan 85 are respectively disposed on the air flow paths of the first exhaust duct 811, the second exhaust duct 812, the third exhaust duct 813, and the fourth exhaust duct 814.

[0030] As Figure 2 shown, the first exhaust duct 811 includes a first connecting pipe 8111 and a second connecting pipe 8112 that are respectively in fluid connection with the drying unit 3. The first connecting pipe 8111 and the second connecting pipe 8112 are arranged in sequence along the transmission direction of the printed paper; after the first connecting pipe 8111 and the second connecting pipe 8112 are merged into one pipeline, they are in fluid connection with the air inlet of the first exhaust fan 82. The second exhaust duct 812 includes a third connecting pipe 8121 and a fourth connecting pipe 8122 that are respectively in fluid connection with the first sheet receiving unit 41 and the second sheet receiving unit 42; after the third connecting pipe 8121 and the fourth connecting pipe 8122 are also merged into one pipeline, they are in fluid connection with the air inlet of the second exhaust fan 83.

[0031] Continuing as Figure 3 shown, the third exhaust fan 84 is disposed on the air flow path of the third exhaust duct 813 and is used to transfer the heat energy from the infrared control cabinet unit 7 in a timely manner, so that the infrared control cabinet unit 7 always operates at a suitable working temperature.

[0032] The fourth exhaust fan 85 is disposed on the air flow path of the fourth exhaust duct 814 and is used to transfer the heat energy from the UV air pump unit 5 in a timely manner, so that the UV air pump unit 5 always operates at a suitable working temperature.

[0033] The temperature control unit is used to monitor the working temperatures at the drying unit 3, the sheet receiving unit 4, the infrared control cabinet unit 7, and the UV air pump unit 5. The temperature control unit includes a first temperature controller 91 arranged at the drying unit 3, a second temperature controller 92 arranged at the sheet receiving unit 4, a third temperature controller 93 arranged at the infrared control cabinet unit 7, and a fourth temperature controller 94 arranged at the UV air pump unit 5, etc. Each temperature controller is configured to be able to set a target temperature and monitor the real-time temperature. Based on the comparison result between the real-time temperature and the set temperature, the temperature controller will transmit a signal to the frequency converter. In this way, each temperature controller is connected to the frequency converter in a one-to-one manner and independently controlled.

[0034] In some embodiments, a first temperature display 95, a second temperature display 96, a third temperature display 97, and a fourth temperature display 98 are respectively arranged at the drying unit 3, the sheet receiving unit 4, the infrared control cabinet unit 7, and the UV air pump unit 5. These temperature displays are used to display the internal temperature of each corresponding unit or unit to the operator.

[0035] The exhaust air control unit 86 includes four manual gear selectors 861 that can be manually switched by the operator, four manual-automatic integrated frequency converters 863, and four manual speed regulators 862.

[0036] The four manual-automatic integrated frequency converters 863 can both automatically frequency-convert and be frequency-converted manually by the operator. The four manual-automatic integrated frequency converters 863 are respectively electrically connected to the first exhaust air fan 82, the second exhaust air fan 83, the third exhaust air fan 84, and the fourth exhaust air fan 85. The four manual-automatic integrated frequency converters 863 are electrically connected to the first temperature controller 91, the second temperature controller 92, the third temperature controller 93, and the fourth temperature controller 94. The first temperature controller 91, the second temperature controller 92, the third temperature controller 93, and the fourth temperature controller 94 achieve automatic frequency conversion by sending control instructions to the corresponding manual-automatic integrated frequency converters 863 to automatically adjust the rotation speed (or operating power) of the corresponding suction fan; the four manual-automatic integrated frequency converters 863 can also achieve manual frequency conversion by being electrically connected to the four manual speed regulators 862 one by one to manually adjust the rotation speed of the corresponding suction fan.

[0037] When the four manual-automatic integrated frequency converters 863 are electrically connected to the four manual speed regulators 862 one by one, the four manual-automatic integrated frequency converters 863 can adjust their output frequencies according to the speed regulation instructions from the four manual speed regulators 862 to respectively adjust the motor speeds of the first exhaust air fan 82, the second exhaust air fan 83, the third exhaust air fan 84, and the fourth exhaust air fan 85. Each manual speed regulator 862 includes a knob that can be operated by the operator.

[0038] When four hand-operated and integrated frequency converters 863 are respectively connected to the first temperature controller 91, the second temperature controller 92, the third temperature controller 93 and the fourth temperature controller 94 by signals, the four temperature controllers can respectively send control instructions to the corresponding hand-operated and integrated frequency converters 863 to automatically change their output frequencies; for example: when the first temperature controller 91 determines that the working temperature inside the drying unit 3 is inconsistent with the set temperature, it will send a control instruction to the corresponding hand-operated and integrated frequency converter 863 to automatically change its output frequency until the temperature inside the drying unit 3 meets the requirements of the set temperature; similarly, the second temperature controller 92 can automatically send a control instruction to the corresponding hand-operated and integrated frequency converter 863 to automatically change its output frequency until the working temperature inside the sheet receiving unit 4 meets the requirements of the set temperature; the third temperature controller 93 can automatically send a control instruction to the corresponding hand-operated and integrated frequency converter 863 to automatically change its output frequency until the working temperature inside the infrared control cabinet unit 7 meets the requirements of the set temperature; the fourth temperature controller 94 can automatically send a control instruction to the corresponding hand-operated and integrated frequency converter 863 to automatically change its output frequency until the working temperature inside the UV air pump unit 5 meets the requirements of the set temperature. In this way, under the control of the four temperature controllers, the exhaust air control unit 86 can automatically control the motor speeds of the first extraction fan 82, the second extraction fan 83, the third extraction fan 84 and the fourth extraction fan 85 by relying on the four hand-operated and integrated frequency converters 863.

[0039] When the four hand-operated and integrated frequency converters 863 are selected to be electrically connected to the four manual speed regulators 862, the operator can send instructions to adjust the output frequency to the corresponding hand-operated and integrated frequency converters 863 through the four manual speed regulators 862; that is, the hand-operated and integrated frequency converter 863 sends the output frequency to the corresponding extraction fan according to the knob position of the corresponding manual speed regulator 862. During manual adjustment, the operator respectively knows the working temperature conditions inside the drying unit 3, the sheet receiving unit 4, the infrared control cabinet unit 7 and the UV air pump unit 5 by reading the temperatures of the first temperature display 95, the second temperature display 96, the third temperature display 97 and the fourth temperature display 98, so as to judge whether it is necessary to manually adjust the corresponding manual speed regulators 862.

[0040] Each manual gear selector 861 is configured to enable an operator to freely switch between a manual speed regulation gear, an automatic speed regulation gear, and a stop gear. When the manual gear selector 861 is switched to the manual speed regulation gear, the first temperature controller 91, the second temperature controller 92, the third temperature controller 93, and the fourth temperature controller 94 are respectively disconnected from the corresponding manual-automatic integrated frequency converter 863, and the corresponding manual speed regulator 862 is electrically connected to the corresponding manual-automatic integrated frequency converter 863; when the manual gear selector 861 is switched to the automatic speed regulation gear, the first temperature controller 91, the second temperature controller 92, the third temperature controller 93, and the fourth temperature controller 94 are respectively electrically connected to the corresponding manual-automatic integrated frequency converter 863, and the corresponding manual speed regulator 862 is disconnected from the corresponding manual-automatic integrated frequency converter 863; when the manual gear selector 861 is switched to the stop gear, the corresponding manual-automatic integrated frequency converter 863 and the corresponding exhaust fan are shut down.

[0041] Based on the above description, the exhaust air control unit 86 can adjust the motor speeds of the first exhaust fan 82, the second exhaust fan 83, the third exhaust fan 84, and the fourth exhaust fan 85 through the four manual-automatic integrated frequency converters 863 at any time. It can either meet the requirement of automatically adjusting the speed without the interference of the operator or meet the requirement of manually adjusting the speed under the manual operation of the operator; whether it is an automatic speed regulation scheme or a manual speed regulation scheme, both can make the entire exhaust air system work with low energy consumption.

[0042] Since the hot air flow discharged to the outside contains harmful substances such as particulate matter, the exhaust air system 800 is also provided with a gas treatment unit 87. The first exhaust air duct 811, the second exhaust air duct 812, the third exhaust air duct 813, and the fourth exhaust air duct 814 are all in fluid communication with the gas treatment unit 87; the gas discharged through the first exhaust air duct 811, the second exhaust air duct 812, the third exhaust air duct 813, and the fourth exhaust air duct 814 will be treated by the gas treatment unit 87 and then discharged to the outside.

[0043] The technical scope of the present utility model is not limited to the content in the above specification. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of the present utility model, and these deformations and modifications should all fall within the protection scope of the present utility model.

Claims

1. An energy-saving exhaust system for a printing press, the printing press comprising a printing unit consisting of a plurality of printing color groups, a glazing unit consisting of one or more glazing groups, a drying unit consisting of a UV drying module, a hot air drying module and an infrared drying module, a UV air pump unit for cooling the UV drying module, a paper receiving unit, a paper conveying line and an infrared control cabinet unit for controlling the operation of the infrared drying module; the printing unit, the glazing unit, the drying unit and the paper receiving unit are arranged in sequence along the transmission direction of the paper, and the paper conveying line passes through the printing unit, the glazing unit, the drying unit and the paper receiving unit in sequence; characterized in that The energy-saving exhaust system comprises: An exhaust duct assembly, comprising a first exhaust duct in fluid communication with the drying unit, a second exhaust duct in fluid communication with the paper receiving unit, a third exhaust duct in fluid communication with the infrared control cabinet unit, and a fourth exhaust duct in fluid communication with the UV air pump unit; Four exhaust fans are respectively arranged in the air flow paths of the first exhaust duct, the second exhaust duct, the third exhaust duct and the fourth exhaust duct; A temperature control unit, comprising four temperature controllers respectively arranged at the drying unit, the paper receiving unit, the infrared control cabinet unit and the UV air pump unit; and The exhaust control unit includes four manual-automatic frequency converters, four manual gear selectors and four manual speed regulators. The four manual-automatic frequency converters are electrically connected to the four exhaust fans one by one, and each of the manual-automatic frequency converters is configured to be able to adjust the motor speed of the corresponding exhaust fan by changing the output frequency; the multiple temperature controllers are electrically connected to each of the manual-automatic frequency converters, and each of the manual-automatic frequency converters is configured to automatically adjust its output frequency according to the control instructions from the corresponding temperature controller; the four manual speed regulators are electrically connected to the four manual-automatic frequency converters one by one, so that the operator can manually select the corresponding manual-automatic frequency converter. output frequency; wherein each of the manual gear selectors is constructed to allow the operator to freely switch between the manual speed control gear, the automatic speed control gear and the stop gear; when switched to the manual speed control gear, the corresponding temperature controller is disconnected from the corresponding manual-automatic frequency converter, and the corresponding manual speed regulator is electrically connected to the corresponding manual-automatic frequency converter; when switched to the automatic speed control gear, the corresponding temperature controller is electrically connected to the corresponding manual-automatic frequency converter, and the corresponding manual speed regulator is disconnected from the corresponding manual-automatic frequency converter; when switched to the stop gear, the corresponding manual-automatic frequency converter and the corresponding exhaust fan are shut down.

2. The energy-saving exhaust system according to claim 1, characterized in that: The drying unit, the paper collecting unit, the infrared control cabinet unit and the UV air pump unit are respectively provided with temperature displays for displaying the internal temperature of each corresponding unit or unit to the operator.

3. The energy-saving exhaust system according to claim 1, characterized in that: The drying unit includes an infrared drying module, a hot air drying module and a UV drying module which are arranged in sequence along the transmission direction of the paper. The first exhaust duct includes a first connecting pipe and a second connecting pipe which are respectively connected to the fluid of the drying unit. The first connecting pipe and the second connecting pipe are arranged in sequence along the transmission direction of the paper.

4. The energy-saving exhaust system according to claim 1, characterized in that: The paper receiving unit includes a first paper receiving unit and a second paper receiving unit which are sequentially arranged along the paper transmission direction. The second exhaust duct includes a third connecting pipe and a fourth connecting pipe which are respectively fluidically connected to the first paper receiving unit and the second paper receiving unit. The third connecting pipe and the fourth connecting pipe are sequentially arranged along the paper transmission direction.

5. The energy-saving exhaust system according to claim 1, characterized in that: The energy-saving exhaust system further comprises: a gas processing unit, and the first exhaust duct, the second exhaust duct, the third exhaust duct and the fourth exhaust duct are all in fluid communication with the gas processing unit.

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