Air exhaust system of printing machine

Abstract

The utility model discloses a printing machine exhaust system which comprises a printing machine, the printing machine comprises a first color printing part, a second color printing part, a third color printing part and a fourth color printing part, a first drying oven is arranged on the first color printing part, a second drying oven is arranged on the second color printing part, and a third drying oven is arranged on the third color printing part. A fourth drying oven is arranged on the fourth color printing part, combustion chambers of the first drying oven and the second drying oven share a first centrifugal fan, and the third drying oven and the fourth drying oven share a second centrifugal fan; a first exhaust pipe is arranged at an air outlet of the first centrifugal fan, a second exhaust pipe is arranged at an air outlet of the second centrifugal fan, and outlets of the first exhaust pipe and the second exhaust pipe are communicated to an outer exhaust pipe; an outer exhaust air detector is arranged on the pipe wall of the outer exhaust air pipe. The exhaust system of the printing machine not only has efficient waste gas emission capacity, but also realizes real-time monitoring and data acquisition in the emission process, and is suitable for the requirements of environmental protection and efficient production of modern printing factories.

Description

Technical Field

[0001] This utility model belongs to the field of printing equipment technology and discloses a printing press exhaust system. Background Technology

[0002] In the modern printing industry, with the continuous improvement of printing speed and quality, printing presses generate a large amount of waste gas during operation, especially during the drying process of printed materials. This waste gas typically contains volatile organic compounds (VOCs) and other harmful substances. If these waste gases are not effectively treated and discharged, they will not only pollute the production environment but may also endanger the health of operators. Therefore, the design and optimization of the printing press's exhaust system is particularly important.

[0003] Traditional printing press exhaust systems typically use a single fan in conjunction with multiple drying ovens. While this achieves exhaust gas discharge, it often suffers from problems such as large equipment footprint, high energy consumption, and unstable emission performance. Furthermore, traditional systems rely on simplistic exhaust monitoring methods, lacking real-time monitoring of exhaust gas velocity, temperature, humidity, and pollutant concentrations, making it difficult to ensure compliance with environmental standards. When system malfunctions or abnormal emissions occur, they cannot be detected and addressed promptly, leading to increased environmental and safety hazards.

[0004] Existing exhaust systems still suffer from maintenance difficulties, particularly in the maintenance and replacement of exhaust gas sensors. Since these sensors are often directly exposed to the external environment, they are susceptible to contamination and damage, leading to system instability and high maintenance costs. Furthermore, existing exhaust systems also have deficiencies in signal transmission; the signal lines are haphazardly arranged and easily affected by external electromagnetic interference, impacting the system's normal operation. Utility Model Content

[0005] To solve the above problems, this utility model provides a printing press exhaust system.

[0006] The technical solution provided by this utility model is as follows:

[0007] A printing press exhaust system includes a printing press, which includes a first color printing section, a second color printing section, a third color printing section, and a fourth color printing section. The first color printing section is equipped with a first oven, the second color printing section is equipped with a second oven, the third color printing section is equipped with a third oven, and the fourth color printing section is equipped with a fourth oven. The combustion chambers of the first oven and the second oven share a first centrifugal fan, and the third oven and the fourth oven share a second centrifugal fan.

[0008] The first centrifugal fan has a first exhaust duct at its outlet, and the second centrifugal fan has a second exhaust duct at its outlet. The outlets of both the first and second exhaust ducts are connected to the external exhaust duct.

[0009] An exhaust air detector is installed on the wall of the exhaust duct.

[0010] In some implementations, the exhaust air detector includes wind speed and air volume transmitters and environmental monitoring transmitters.

[0011] In some embodiments, the exhaust detector also includes a housing and a mounting plate, the mounting plate being mounted on the wall of the external exhaust duct by screws, and the wind speed and air volume transmitter and the environmental monitoring transmitter being fixed inside the housing.

[0012] In some implementations, the mounting plate has through holes through which the probes of the wind speed and air volume transmitters and the environmental monitoring transmitters extend into the external exhaust duct.

[0013] In some implementations, a cover plate is provided on the side of the housing away from the fixed plate, and the cover plate is detachably installed on the housing.

[0014] In some implementations, a signal cable housing is provided on the frame of the printing press, and an external exhaust detector is electrically connected to the signal cable housing.

[0015] In some embodiments, the surface of the first exhaust duct is provided with a wiring groove, which connects the external exhaust detector and the signal cable box.

[0016] In summary, the beneficial effects of this utility model are as follows:

[0017] (1) This utility model improves exhaust efficiency and reduces equipment space and energy consumption by centrally treating the exhaust gas from multiple ovens and using two high-efficiency centrifugal fans to treat the exhaust gas from the first, second, third, and fourth ovens respectively. The design of sharing a fan among multiple ovens not only optimizes the equipment layout but also reduces system costs.

[0018] (2) This utility model is equipped with an external exhaust gas detector, which can monitor the exhaust gas emission speed, emission volume, temperature, humidity, and concentration of pollutants such as sulfur dioxide and VOCs in real time. Through the coordinated operation of the wind speed and air volume transmitter and the environmental monitoring transmitter, it ensures that all indicators in the exhaust gas emission process meet the environmental protection requirements, which greatly improves the safety and environmental performance of the system.

[0019] (3) This utility model protects the sensor from external environmental damage and extends its service life by introducing a housing structure into the external exhaust detector. The housing is equipped with a removable cover, which facilitates the maintenance and replacement of the sensor by the operator, simplifies the operation process, and reduces the maintenance cost of the system.

[0020] (4) This utility model features a signal cable box on the printing press frame and uses cable trays to arrange the signal cables in a reasonable manner, avoiding messy cable routing. This design not only beautifies the overall layout of the system but also effectively prevents the signal cables from being interfered with by external factors, ensuring the stability of signal transmission and improving the overall reliability of the system. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the exhaust system of a printing press.

[0022] Figure 2 Side view of the printing press exhaust system;

[0023] Figure 3 for Figure 2 Enlarged view of point A in the middle.

[0024] The attached figures are labeled as follows:

[0025] 1. First color printing section; 2. Second color printing section; 3. Third color printing section; 4. Fourth color printing section; 5. First drying oven; 6. Second drying oven; 7. Third drying oven; 8. Fourth drying oven; 10. First centrifugal fan; 11. Second centrifugal fan; 12. First exhaust duct; 13. Second exhaust duct; 14. External exhaust duct; 15. External exhaust detector; 16. Frame; 17. Signal cable box; 18. Cable tray;

[0026] 1501. Wind speed and air volume transmitter; 1502. Environmental monitoring transmitter; 1503. Housing; 1504. Mounting plate; 1505. Screws; 1506. Cover plate. Detailed Implementation

[0027] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0028] Example 1:

[0029] This embodiment provides a printing press exhaust system, such as Figure 1-3 As shown, the printing press specifically includes a printing press with four color printing sections: a first color printing section 1, a second color printing section 2, a third color printing section 3, and a fourth color printing section 4. Each color printing section is equipped with an oven for drying the printed matter. The first color printing section 1 has a first oven 5, the second color printing section 2 has a second oven 6, the third color printing section 3 has a third oven 7, and the fourth color printing section 4 has a fourth oven 8.

[0030] To improve exhaust efficiency and reduce equipment space requirements, the exhaust gases from the combustion chambers of the first oven 5 and the second oven 6 are discharged through a shared first centrifugal fan 10. The first centrifugal fan 10 has a high-efficiency exhaust capacity, capable of handling the exhaust gases from both ovens simultaneously, ensuring efficient exhaust while reducing equipment costs and space requirements. Similarly, the exhaust gases from the combustion chambers of the third oven 7 and the fourth oven 8 are discharged through a shared second centrifugal fan 11. The exhaust outlets of the two fans are connected to the first exhaust duct 12 and the second exhaust duct 13, respectively. The first exhaust duct 12 and the second exhaust duct 13 ultimately converge into the external exhaust duct 14, discharging the exhaust gases outdoors.

[0031] An exhaust gas detector 15 is installed on the wall of the exhaust duct 14 to monitor various indicators of the discharged exhaust gas in real time. The exhaust gas detector 15 mainly includes an air velocity and volume transmitter 1501 and an environmental monitoring transmitter 1502. The air velocity and volume transmitter 1501 measures the emission velocity of the exhaust gas, ensuring the normal operation of the exhaust system and providing data support for adjusting the fan's operating status. The environmental monitoring transmitter 1502 is responsible for monitoring environmental parameters such as the temperature, humidity, and pollutant concentration of the exhaust gas to ensure that emissions meet environmental standards. The environmental monitoring transmitter 1502, model FXA-TG100, can monitor the temperature, humidity, illuminance, and various gases, including carbon dioxide, ammonia, hydrogen sulfide, carbon monoxide, and combustible gases, in the air in real time.

[0032] Example 2

[0033] Based on Example 1, to better protect the sensor and extend its service life, the exhaust gas detector 15 is equipped with an integrated housing 1503. The housing 1503 is made of corrosion-resistant material, effectively preventing external environmental corrosion of the sensor while maintaining its integrated design. The housing 1503 is mounted on the wall of the exhaust duct 14 via a mounting plate 1504. The mounting plate 1504 has pre-drilled through holes, allowing the probes of the wind speed and volume transmitter 1501 and the environmental monitoring transmitter 1502 to extend into the exhaust duct 14, thereby directly contacting the emitted exhaust gas for real-time monitoring.

[0034] A removable cover plate 1506 is provided on the side of the housing 1503 away from the fixing plate 1504. The cover plate 1506 is fixed to the housing 1503 with screws. When the sensor needs maintenance or replacement, the operator only needs to remove the screws and remove the cover plate 1506 to easily access and operate the sensor inside the housing. This design not only simplifies the maintenance process but also greatly reduces system downtime and improves the operating efficiency of the exhaust system.

[0035] Example 3

[0036] To ensure stable data transmission from the exhaust fan detector 15, a dedicated signal cable box 17 is installed on the printing press frame 16. The signal cable box 17 centrally manages all signal lines transmitted from the exhaust fan detector 15 to the printing press control system. The internal layout of the signal cable box 17 is optimized to effectively prevent mutual interference between signal lines and provides excellent electromagnetic interference resistance, thereby ensuring stable signal transmission and preventing data loss or transmission errors.

[0037] In addition, for aesthetic purposes and to protect the signal cables, a dedicated cable tray 18 is provided on the surface of the first exhaust duct 12. The cable tray 18 guides the signal cables of the external exhaust detector 15 to the signal cable housing 17, ensuring that the signal cables are neatly and orderly laid out in the exhaust system, avoiding potential safety hazards caused by messy wiring. At the same time, the cable tray 18 is designed for ease of maintenance; operators can easily remove the tray cover for inspection and maintenance of the wiring.

[0038] The printing press exhaust system provided by this invention not only has a high-efficiency exhaust gas emission capacity, but also realizes real-time monitoring and data acquisition of the emission process. The system's structural design takes into account the compactness of the equipment, ease of maintenance, and stability of signal transmission, making it particularly suitable for the environmental protection and high-efficiency production needs of modern printing plants.

[0039] It should be noted that implementations not shown or described in the accompanying drawings or the main text of the specification are all forms known to those skilled in the art and are not described in detail. Furthermore, the definitions of the elements and methods described above are not limited to the various specific structures, shapes, or methods mentioned in the embodiments.

[0040] It should also be noted that this document may provide examples of parameters containing specific values, but these parameters need not be exactly equal to the corresponding values, but can approximate the corresponding values ​​within acceptable error tolerances or design constraints. Directional terms mentioned in the embodiments, such as "up," "down," "front," "back," "left," "right," "inner," and "outer," are only for reference to the directions in the accompanying drawings and are not intended to limit the scope of protection of this application.

[0041] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or related technical or knowledge. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A printing press exhaust system, characterized in that, The printing press includes a first color printing unit (1), a second color printing unit (2), a third color printing unit (3), and a fourth color printing unit (4). The first color printing unit (1) is equipped with a first oven (5), the second color printing unit (2) is equipped with a second oven (6), the third color printing unit (3) is equipped with a third oven (7), and the fourth color printing unit (4) is equipped with a fourth oven (8). The combustion chambers of the first oven (5) and the second oven (6) share a first centrifugal fan (10), and the third oven (7) and the fourth oven (8) share a second centrifugal fan (11). The first centrifugal fan (10) has a first exhaust pipe (12) at its outlet, and the second centrifugal fan (11) has a second exhaust pipe (13) at its outlet. The outlets of the first exhaust pipe (12) and the second exhaust pipe (13) are both connected to the external exhaust pipe (14). An exhaust air detector (15) is provided on the wall of the exhaust duct (14).

2. The printing press exhaust system according to claim 1, characterized in that, The exhaust air detector (15) includes a wind speed and air volume transmitter (1501) and an environmental monitoring transmitter (1502).

3. The printing press exhaust system according to claim 2, characterized in that, The exhaust detector (15) also includes a housing (1503) and a fixing plate (1504). The fixing plate (1504) is installed on the wall of the external exhaust pipe (14) by screws (1505). The wind speed and air volume transmitter (1501) and the environmental monitoring transmitter (1502) are fixed inside the housing (1503).

4. The printing press exhaust system according to claim 3, characterized in that, The fixed plate (1504) has a through hole, through which the probes of the wind speed and air volume transmitter (1501) and the environmental monitoring transmitter (1502) extend into the external exhaust duct (14).

5. The printing press exhaust system according to claim 4, characterized in that, The box (1503) has a cover plate (1506) on the side away from the fixing plate (1504), and the cover plate (1506) is detachably installed on the box (1503).

6. The printing press exhaust system according to claim 1, characterized in that, The printing press frame (16) is provided with a signal line box (17), and the external exhaust detector (15) is electrically connected to the signal line box (17).

7. The printing press exhaust system according to claim 6, characterized in that, The surface of the first exhaust duct (12) is provided with a wiring groove (18), which connects the external exhaust detector (15) and the signal cable box (17).

Images