Device for solving surface dew formation of printing cooling roller

Abstract

The utility model discloses a device for solving surface dew formation of a printing cooling roller, which relates to the technical field of printing production of photogravure presses and comprises a control mechanism and a circulating mechanism. In the control mechanism, an infrared thermometer can monitor the temperature of water flowing into the cooling roller in real time and quickly feed back temperature data to an automatic water temperature control cabinet in the form of an electric signal. The circulating mechanism covers the first proportional valve, the first guide pipe, the three-way connector, the ice water pool, the second proportional valve and the second guide pipe. During operation, the water temperature automatic control cabinet accurately regulates and controls the opening and closing and the opening degree of the two proportional valves according to feedback signals, normal-temperature water and ice water are mixed, and the temperature of water entering the cooling roller is stably controlled to be 18-25 DEG C. The device achieves precise intelligent temperature control, abandons the defects of traditional experience temperature control, reduces energy consumption by connecting tap water through the tee joint, successfully overcomes the problem of condensation of the cooling roller, improves product quality, reduces raw material loss, reduces cost and benefits, and guarantees efficient and stable operation of the photogravure press.

Description

Technical Field

[0001] This utility model relates to the field of gravure printing production technology, specifically a device for solving the problem of condensation on the surface of printing cooling rollers. Background Technology

[0002] A gravure printing press mainly consists of a feeding section, a printing unit, a cooling roller section, and a take-up section. Among these, the cooling roller is an indispensable key component. Its core function is to cool the printed material promptly, effectively preventing shrinkage, deformation, and sticking after roll formation, thus ensuring the quality of the printed product. According to standards, the surface temperature of the cooling roller must be maintained between 18-25℃. This is typically achieved by circulating chilled water at a fixed temperature inside the roller, allowing the printed material to cool as it passes through. In the printing process, after being dried in an oven, the printed material must be cooled by the cooling roller before being rolled up.

[0003] However, current gravure printing press cooling rollers have certain technical defects. In winter, due to the low temperature, room temperature tap water is sufficient for cooling, and the temperature difference between the cooling roller surface and the workshop temperature is within 5°C, preventing condensation. However, in summer, to meet cooling requirements, ice water must be supplied to the cooling rollers. This causes the temperature difference between the cooling roller surface and the workshop temperature to exceed 5°C, even reaching over 10°C, resulting in significant condensation. The condensed water droplets from the cooling roller will drip onto the printed materials, rendering them unusable. To date, no effective technical methods have been found to improve this problem. Utility Model Content

[0004] To address the aforementioned technical problems, this utility model provides the following technical solution: A device for solving condensation on the surface of a printing cooling roller, comprising a control mechanism and a circulation mechanism; the control mechanism is used to control the water temperature in the circulation mechanism; the circulation mechanism includes a cooling roller, which has an inlet end and an outlet end, the inlet end of the cooling roller is provided with a first conduit, the other end of the first conduit is provided on the outlet end of a three-way connector, the inlet end of the cooling roller is provided with a control mechanism for controlling the water temperature at that location, the control mechanism includes an infrared thermometer and an automatic water temperature control cabinet; the infrared thermometer is provided at the inlet end of the cooling roller, the infrared thermometer is electrically connected to the automatic water temperature control cabinet, the automatic water temperature control cabinet controls the opening and closing states of proportional valve one and proportional valve two provided at the inlet end of the three-way connector through the electrical signal fed back by the infrared thermometer, the other end of proportional valve two is provided on an ice water tank, and the outlet end of the cooling roller is detachably provided on the ice water tank through the second conduit.

[0005] Furthermore, the other end of the proportional valve is installed on the supply equipment for ambient temperature tap water.

[0006] Furthermore, both the three-way connector and the outer surface of the conduit are covered with a heat insulation layer.

[0007] The advantages of this utility model compared with the prior art are:

[0008] 1. Achieve precise and intelligent temperature control: This device monitors the water temperature entering the cooling roller in real time using an infrared thermometer and feeds back the temperature data to the automatic water temperature control cabinet in the form of electrical signals. This design changes the previous unscientific method of single temperature control and experience-based operation, achieving precise temperature control based on data. Based on the feedback signal, the automatic water temperature control cabinet intelligently adjusts the opening and closing states of proportional valve one and proportional valve two, strictly maintaining the water temperature entering the cooling roller within the ideal range of 18-25℃, ensuring stable operation of the cooling roller and greatly improving the scientific nature and reliability of temperature control.

[0009] 2. Reduced energy costs: The ingenious design of the three-way connector allows one end to be connected to the ambient temperature tap water supply equipment. During the summer cooling process, when the chilled water temperature is detected to be too low, the automatic water temperature control cabinet automatically opens proportional valve one to introduce ambient temperature tap water to mix with the chilled water. This flexible water replenishment method avoids the high energy consumption caused by continuous use of low temperature chilled water, effectively reduces unnecessary power consumption caused by fixed temperature cooling, lowers the overall energy cost, and makes the equipment operation more energy-efficient and environmentally friendly.

[0010] 3. Improved Product Quality and Production Efficiency: Previously, condensation on the cooling rollers often led to product scrap due to non-compliance with customer requirements, resulting in significant raw material waste. This device completely solves the condensation problem by precisely controlling the temperature difference between the cooling roller water and the ambient temperature within a 5°C range. This not only significantly improves the quality of printed materials but also reduces raw material losses caused by product scrap, truly achieving the goal of cost reduction and efficiency improvement, enhancing the company's competitiveness in the market, and improving the overall economic efficiency of the production process.

[0011] 4. Improve equipment operational stability; The design of the circulation mechanism allows the cooled water to flow out from the outlet of the cooling roller and enter the ice water pool through the second conduit for recycling. On the one hand, this improves the utilization rate of water resources and reduces production costs; on the other hand, the stable water circulation system ensures the continuity and stability of the cooling process, reduces equipment downtime caused by cooling system failures, and improves the overall operating efficiency of the gravure printing machine.

[0012] 5. It has good thermal insulation performance; the three-way connector and the outer surface of the conduit are wrapped with a thermal insulation layer made of polystyrene foam, which effectively reduces the heat exchange between the circulating water and the external environment, further ensures the stability of water temperature, helps to maintain the constant surface temperature of the cooling roller, and improves the energy-saving effect and operational reliability of the entire cooling system. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0014] Attached reference numerals: 10-Proportional valve one; 11-Conduit one; 12-T-connector; 13-Ice water tank; 14-Proportional valve two; 15-Infrared thermometer; 16-Cooling roller; 17-Conduit two; 18-Automatic water temperature control cabinet. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] like Figure 1 As shown, an apparatus for solving condensation on the surface of a printing cooling roller includes a control mechanism and a circulation mechanism; the control mechanism is used to control the water temperature in the circulation mechanism; the circulation mechanism includes a proportional valve 10, a conduit 11, a three-way connector 12, an ice water tank 13, a proportional valve 2 14, a cooling roller 16, and a conduit 2 17; the control mechanism includes an infrared thermometer 15 and an automatic water temperature control cabinet 18.

[0017] like Figure 1 As shown, the cooling roller 16 has an inlet end and an outlet end. The inlet end of the cooling roller 16 is provided with a conduit 11, and the other end of the conduit 11 is provided on the outlet end of the three-way connector 12. The three-way connector 12 has two inlets and one outlet end. The inlet end of the cooling roller 16 is provided with an infrared thermometer 15 for detecting the water temperature at that location. The infrared thermometer 15 is electrically connected to the automatic water temperature control cabinet 18. The automatic water temperature control cabinet 18 controls the opening and closing states of the proportional valve 10 and proportional valve 14 provided on the inlet end of the three-way connector 12 through the electrical signal fed back by the infrared thermometer 15. The other end of the proportional valve 14 is provided on the ice water tank 13. The outlet end of the cooling roller 16 is detachably provided on the ice water tank 13 through a conduit 17, which is threaded onto the ice water tank 13. The other end of the proportional valve 10 is provided on the supply equipment for ambient temperature tap water. The three-way connector 12 and the conduit 17 are both wrapped with a heat insulation layer made of polystyrene foam.

[0018] like Figure 1As shown, this utility model discloses a device for solving the problem of condensation on the surface of a printing cooling roller. Its working principle is as follows: One end of proportional valve 10 is connected to a supply device for ambient temperature tap water. In summer, the ice water tank 13 pumps ice water into the cooling roller 16 through proportional valve 14, tee connector 12, and conduit 11. To avoid excessive temperature difference between the printing press environment and the surface temperature of the cooling roller 16, which could lead to frost formation, an infrared thermometer 15 measures the water temperature entering the cooling roller 16 as the ice water flows into the cooling roller 16 from conduit 11. This water temperature is then transmitted in real-time to the automatic water temperature control cabinet 18 via an electrical signal. After processing by the automatic water temperature control cabinet 18, when the water temperature is below 18°C... The automatic water temperature control cabinet 18 sends an electrical signal to open the proportional valve 10 and controls the opening degree of the proportional valve 10 to control the inflow of room temperature water. This allows the room temperature tap water entering from one end of the proportional valve 10 to enter the three-way connector 12 and finally mix with the chilled water, flowing together through the conduit 11 into the cooling roller 16. During this process, the automatic water temperature control cabinet 18 maintains the water temperature entering the cooling roller 16 between 18 and 25°C. Simultaneously, the operator maintains the printing press ambient temperature between 20 and 30°C to ensure that the water temperature inside the cooling roller 16 matches the printing press ambient temperature. The temperature difference between the printing press ambient temperature and the water temperature inside the cooling roller 16 is kept within 5°C to prevent frost formation on the surface of the cooling roller 16 from affecting the printed matter. After cooling, the water flows out from the outlet end of the cooling roller 16 and enters the chilled water pool 13 through the second conduit 17 for circulation.

Claims

1. A device for solving condensation on the surface of a printing chill roll, characterized by: The control mechanism is used for controlling the temperature of water in the circulating mechanism; The circulating mechanism comprises a cooling roller (16) having a water inlet end and a water outlet end, the water inlet end of the cooling roller (16) is provided with a pipe (11), the other end of the pipe (11) is arranged on the water outlet end of a three-way joint (12), and the water inlet end of the cooling roller (16) is provided with a control mechanism for controlling the water temperature at the position. The control mechanism comprises an infrared thermometer (15) and a water temperature automatic control cabinet (18), the infrared thermometer (15) is arranged on the water inlet end of the cooling roller (16), the infrared thermometer (15) is electrically connected to the water temperature automatic control cabinet (18), the water temperature automatic control cabinet (18) controls the opening and closing states of a proportional valve (10) arranged on the water inlet end of the three-way joint (12) and a proportional valve (14) arranged on the other end of an ice water pool (13) through an electric signal fed back by the infrared thermometer (15), and the water outlet end of the cooling roller (16) is detachably arranged on the ice water pool (13) through a pipe (17).

2. The device for solving the condensation on the surface of the printing cooling roller according to claim 1, characterized in that: The other end of the proportional valve (10) is arranged on a normal-temperature tap water supply device.

3. The device for solving the condensation on the surface of the printing cooling roller according to claim 1, characterized in that: The three-way joint (12) and the pipe (17) are both wrapped with a heat insulation layer.

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