A hot air circulating device for POE film transverse stretching equipment oven

Abstract

The utility model discloses a hot air circulation device for POE film transverse stretching equipment oven relates to POE film production technical field. The device includes the electric heating box of oven outer top surface, and electric heating box one side is connected suction pipe, and the other side is connected upper and lower air outlet pipe, and upper and lower air outlet pipe are connected respectively upper and lower static pressure tank, and upper and lower static pressure tank are arranged in the upper and lower part of oven and are equipped with the uniform air outlet hole of vertical orientation film surface, and suction pipe air inlet end is arranged in the bottom of oven and is connected double suction box, and the circulating fan is installed on suction pipe, and oven outer top surface is equipped with exhaust fan, and its air inlet end is connected oven top, and the air outlet end is connected waste gas treatment device. The utility model solves the problem of the existing technology in the oven combustible gas gathering easy to cause explosion, hot air circulation uneven and low heat efficiency, realizes safe and efficient heating and waste gas discharge.

Description

Technical Field

[0001] This utility model relates to the field of POE film production technology, specifically to a hot air circulation device for the oven of a POE film transverse stretching equipment. Background Technology

[0002] POE film is a high-performance material based on polyolefin elastomer (POE). With its excellent elasticity, weather resistance, and processability, it has become a key substrate in fields such as photovoltaic encapsulation, automotive lightweighting, and foaming materials. The transverse stretching process is the core step in POE film production, directly determining key indicators such as the film's mechanical properties and thickness uniformity. The oven, as the core heat treatment unit of the transverse stretching equipment, requires a stable and uniform internal hot air environment to ensure stretching quality.

[0003] During the lateral stretching process of POE film, the film releases flammable organic gases when heated. These gases are less dense than air and tend to accumulate in the upper space of the oven. When the gas concentration reaches the explosion limit, contact with high-temperature sources such as heating elements inside the oven can easily cause combustion or explosion accidents. This not only leads to the scrapping of a large number of products and serious damage to equipment, but also directly threatens the personal safety of production personnel, becoming a major safety hazard in POE film production.

[0004] The existing hot air circulation devices in the ovens of POE film transverse stretching equipment have several technical defects in practical applications: First, the hot air is unevenly distributed within the oven, creating significant temperature gradients in different areas of the film surface. This leads to an imbalance in stress distribution during film stretching, resulting in quality problems such as thickness fluctuations and excessive crystal points. Second, the hot air circulation path is poorly designed, creating dead zones in some areas. This stagnation of hot air leads to low heat exchange efficiency and significant energy waste. Third, the system relies excessively on the electric heating elements inside the oven for heat source. After multiple cycles, the temperature of the hot air drops significantly, making precise temperature control impossible. This is especially problematic when there are fluctuations in ambient temperature or changes in the film feed rate, significantly reducing process stability. Fourth, combustible gases accumulate inside the oven over a long period without effective exhaust, failing to address the formation of localized high-concentration areas within the oven and posing a persistent safety hazard. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of the above-mentioned technologies and provide a hot air circulation device for the oven of a POE film transverse stretching equipment. This device solves the problems of combustible gas accumulation in the oven that can easily cause an explosion, uneven hot air circulation, and low thermal efficiency in the prior art, thereby achieving safe and efficient heating and exhaust gas discharge.

[0006] To achieve the above-mentioned objectives, the technical solution adopted by this utility model is as follows:

[0007] A hot air circulation device for a POE film transverse stretching equipment oven is installed on the oven. It is characterized by comprising an electric heating box disposed on the outer top surface of the oven. One side of the electric heating box is connected to the air outlet of a suction pipe, and the other side is connected to the air inlet of an upper air outlet pipe and a lower air outlet pipe. The air outlets of the upper and lower air outlet pipes are respectively connected to an upper static pressure box and a lower static pressure box. The upper and lower static pressure boxes are respectively disposed in the upper and lower parts of the oven. Each of the upper and lower static pressure boxes has an air outlet hole perpendicular to the film surface, ensuring that hot air acts vertically and evenly on the upper and lower surfaces of the POE film. The air inlet of the suction pipe is located at the bottom of the oven below the lower static pressure box, and a circulating fan is installed on the suction pipe to provide power for hot air circulation.

[0008] Furthermore, the air inlet end of the suction pipe is connected to a suction box, and the suction box has multiple air inlet holes on both side walls.

[0009] Furthermore, two suction boxes are provided, located on both sides of the bottom of the oven. The design of dual suction boxes and densely distributed air inlets enhances the uniform intake effect of airflow at the bottom of the oven and avoids local airflow stagnation.

[0010] Furthermore, the air inlet of the suction box is a small circular hole with a diameter of 2-5mm and a hole spacing of 10-20mm, which can ensure suction efficiency and prevent the suction pipe from being blocked.

[0011] Furthermore, both the upper static pressure chamber and the lower static pressure chamber extend along the length of the oven, and their air outlets are evenly distributed to ensure uniform coverage of hot air in the width direction of the film surface.

[0012] Furthermore, an exhaust fan is installed on the outer top surface of the oven. The air inlet of the exhaust fan is connected to the top of the oven, and the air outlet of the exhaust fan is connected to the exhaust gas treatment device. This allows for the timely discharge of volatile exhaust gases generated by film heating inside the oven, preventing the accumulation of exhaust gases inside the oven and the potential for an explosion.

[0013] Furthermore, the electric heating box is equipped with multiple sets of electric heating tubes, and the electric heating box has a built-in temperature sensor that is electrically connected to an external temperature control system to realize real-time monitoring and precise control of the hot air temperature.

[0014] Furthermore, both the upper and lower air outlet pipes are equipped with air volume regulating valves, which can adjust the air volume of the upper and lower static pressure boxes respectively according to the requirements of the film stretching process, to ensure uniform heating of the upper and lower surfaces of the film.

[0015] The beneficial effects of this utility model are as follows:

[0016] 1. Through the design of upper and lower static pressure chambers and uniform air outlets perpendicular to the film surface, hot air can be applied vertically and uniformly to the upper and lower surfaces of the POE film, effectively eliminating the temperature gradient of the film surface and avoiding quality problems such as thickness fluctuations and crystal point exceedances caused by unbalanced stress distribution.

[0017] 2. The design adopts an upper air outlet duct, a lower air outlet duct, an air outlet duct, and a bottom double suction box. Combined with an electric heating box and a circulating fan, it forms a highly efficient circulation path of "bottom suction - top heating - air outlet from the top and bottom of the film surface", eliminating dead air zones in the oven and significantly shortening the hot air residence time, which can reduce energy consumption.

[0018] 3. The electric heating box is placed outside the oven. Combined with the linkage between the temperature sensor and the external temperature control system, the hot air temperature can be monitored and precisely controlled in real time. Even when the ambient temperature fluctuates or the film feeding speed changes, the process stability can still be maintained to meet the stretching requirements of POE films of different specifications.

[0019] 4. By combining the top exhaust fan with the exhaust gas treatment device, the volatile combustible gases accumulated in the upper part of the oven can be discharged in a timely manner, completely eliminating the safety hazards of combustion and explosion, and ensuring the personal safety of production personnel and the stable operation of equipment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the structure of this utility model installed on an oven.

[0022] In the diagram: 1. Oven; 2. Electric heating box; 3. Suction pipe; 4. Upper air outlet pipe; 5. Lower air outlet pipe; 6. Upper static pressure box; 7. Lower static pressure box; 8. Circulating fan; 9. Suction box; 10. Air inlet; 11. Exhaust fan; 12. Air volume regulating valve. Detailed Implementation

[0023] The technical solution of this utility model will be further described in detail below through specific embodiments and with reference to the accompanying drawings:

[0024] like Figure 1-2As shown, a hot air circulation device for a POE film transverse stretching equipment oven is installed on the oven 1, including an electric heating box 2 installed on the outer top surface of the oven 1. One side of the electric heating box 2 is connected to the air outlet of the suction pipe 3, and the other side is connected to the air inlet of the upper air outlet pipe 4 and the lower air outlet pipe 5. The air outlets of the upper air outlet pipe 4 and the lower air outlet pipe 5 are respectively connected to the upper static pressure box 6 and the lower static pressure box 7. The upper static pressure box 6 and the lower static pressure box 7 are respectively installed in the upper and lower parts of the oven 1. The upper static pressure box 6 and the lower static pressure box 7 are respectively provided with air outlet holes that are vertically oriented towards the film surface to ensure that the hot air acts vertically and evenly on the upper and lower surfaces of the POE film. The air inlet of the suction pipe 3 is located at the bottom of the oven 1 below the lower static pressure box 7. A circulating fan 8 is installed on the suction pipe 3 to provide power for hot air circulation.

[0025] In this embodiment, the air inlet end of the suction pipe 3 is connected to the suction box 9, and multiple air inlets 10 are provided on the two side walls of the suction box 9.

[0026] In this embodiment, two suction boxes 9 are provided, located on both sides of the bottom of the oven 1 respectively. The design of double suction boxes 9 and densely distributed air inlets 10 enhances the uniform intake effect of airflow at the bottom of the oven 1 and avoids local airflow stagnation.

[0027] In this embodiment, the air inlet 10 of the suction box 9 is a small circular hole with a diameter of 2-5mm and a hole spacing of 10-20mm, which can ensure suction efficiency and prevent the suction pipe 3 from being blocked.

[0028] In this embodiment, both the upper static pressure box 6 and the lower static pressure box 7 extend along the length of the oven 1, and their air outlets are evenly distributed to ensure uniform coverage of hot air in the width direction of the film surface.

[0029] In this embodiment, an exhaust fan 11 is provided on the outer top surface of the oven 1. The air inlet of the exhaust fan 11 is connected to the top of the oven 1, and the air outlet of the exhaust fan 11 is connected to the exhaust gas treatment device. This can promptly discharge the volatile exhaust gas generated by the film heating inside the oven 1, and prevent the exhaust gas from accumulating inside the oven 1 and causing an explosion.

[0030] In this embodiment, the electric heating box 2 is equipped with multiple sets of electric heating tubes. The electric heating box 2 has a built-in temperature sensor that is electrically connected to an external temperature control system to realize real-time monitoring and precise control of the hot air temperature.

[0031] In this embodiment, both the upper air outlet duct 4 and the lower air outlet duct 5 are equipped with air volume regulating valves 12, which can adjust the air volume of the upper static pressure box 6 and the lower static pressure box 7 respectively according to the requirements of the film stretching process, so as to ensure the uniform heating of the upper and lower surfaces of the film.

[0032] The working process of this utility model is as follows:

[0033] 1. Start the circulating fan 8. The air at the bottom of the oven 1 is drawn into the suction pipe 3 through the air inlet 10 of the suction box 9 and enters the electric heating box 2.

[0034] 2. The electric heating tube in the electric heating box 2 heats the air. The temperature sensor 3 monitors the temperature of the hot air after heating in real time and feeds the signal back to the PLC temperature control system. The temperature control system controls the power of the electric heating tube to stabilize and achieve constant temperature control.

[0035] 3. Constant temperature hot air enters the upper static pressure box 6 and the lower static pressure box 7 through the upper air outlet pipe 4 and the lower air outlet pipe 5 respectively, and is blown vertically onto the upper and lower surfaces of the POE film in the oven 1 through the evenly distributed air outlet holes to achieve uniform heating of the film.

[0036] 4. Simultaneously start the exhaust fan 11. The volatile combustible gas released by the POE film when heated accumulates at the top of the oven 1 because its density is less than that of air. It is then drawn into the exhaust fan 11 through the exhaust pipe and finally sent to the exhaust gas treatment device for harmless treatment.

[0037] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention without departing from the principles and spirit of the present invention. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the technical solution of the present invention.

Claims

1. A hot air circulation device for an oven in a POE film transverse stretching equipment, characterized in that, The device includes an electric heating box located on the top surface of the oven. One side of the electric heating box is connected to the air outlet of a suction pipe, and the other side is connected to the air inlet of an upper air outlet pipe and a lower air outlet pipe. The air outlets of the upper and lower air outlet pipes are respectively connected to an upper static pressure box and a lower static pressure box. The upper and lower static pressure boxes are respectively located in the upper and lower parts of the oven. The upper and lower static pressure boxes are respectively provided with air outlets vertically facing the film surface. The air inlet of the suction pipe is located at the bottom of the oven below the lower static pressure box, and a circulating fan is installed on the suction pipe.

2. The hot air circulation device for the oven of a POE film transverse stretching equipment according to claim 1, characterized in that, The air inlet end of the suction pipe is connected to a suction box, and multiple air inlets are provided on the two side walls of the suction box.

3. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 2, characterized in that, There are two suction boxes, located on the bottom sides of the oven.

4. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 2 or 3, characterized in that, The air intake of the suction box is a small circular hole with a diameter of 2-5mm and a spacing of 10-20mm.

5. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 1, characterized in that, Both the upper static pressure chamber and the lower static pressure chamber extend along the length of the oven, and their air outlets are evenly distributed.

6. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 1, characterized in that, An exhaust fan is installed on the outer top surface of the oven. The air inlet of the exhaust fan is connected to the top of the oven, and the air outlet of the exhaust fan is connected to the exhaust gas treatment device.

7. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 1, characterized in that, The electric heating box is equipped with multiple sets of electric heating tubes, and the electric heating box has a built-in temperature sensor that is electrically connected to an external temperature control system.

8. A hot air circulation device for an oven in a POE film transverse stretching equipment according to claim 1, characterized in that, Both the upper and lower air outlet pipes are equipped with air volume regulating valves.

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