Sterilization device for on-line production of fried food packaging bags

Abstract

The invention discloses a sterilization device for on-line production of fried food packaging bags, and relates to the technical field of food packaging sterilization, the sterilization device comprises a machine body, a first guide roller and a second guide roller are rotatably arranged in the machine body, and the first guide roller and the second guide roller are arranged in parallel and located at the same height; a heating roller is rotationally arranged below the position between the first guide roller and the second guide roller, a plurality of hydrogen peroxide atomizing nozzles are arranged on the side, away from the second guide roller, of the first guide roller, a tensioning roller used for pressing the upper surface of food paper is arranged between the second guide roller and the heating roller, and a plurality of air suction holes are formed in the surface of the tensioning roller. The tensioning roller is sleeved with a water-absorbing breathable sleeve. The food paper surface sterilization device can efficiently and quickly sterilize the food paper surface.

Description

Technical Field

[0001] The present application relates to the technical field of food packaging sterilization, and in particular to a sterilization device for online production of fried food packaging bags. Background Art

[0002] Chicken fillet is a particularly popular fried snack. After being fried, the chicken fillet is packed in a paper bag and delivered to the buyer. In order to prevent the paper bag from breaking or edible oil from seeping out of the paper bag during the process of packing the chicken fillet, a plastic composite film is provided on the inner wall of the paper bag for the chicken fillet.

[0003] The manufacturing process of chicken fillet paper bags generally includes: extracting food paper rolls, folding, heating and pasting, and cutting. In order to cope with the price fluctuations of food paper rolls and ensure the normal progress of daily production, chicken fillet paper bag manufacturers usually store a certain amount of food paper rolls. During processing, the food paper rolls are taken out of the warehouse and directly processed in the sanitary production workshop. Since some food paper rolls are stored in the warehouse for too long, bacteria will inevitably grow. Therefore, it is necessary to sterilize the food paper during the extraction process. The most commonly used sterilization method is to use ultraviolet light to irradiate the side of the food paper with a plastic composite film.

[0004] During the production process of chicken fillet paper bags, food paper rolls need to be continuously extracted, so the food paper cannot stay in the range of ultraviolet light for too long. In order for ultraviolet sterilization to have a good effect, it needs to be irradiated by ultraviolet light for 25-35 minutes, which is simply not enough for online production. Summary of the invention

[0005] In order to overcome the drawback of the time required for sterilization, the present application provides a sterilization device for online production of fried food packaging bags.

[0006] The present application provides a sterilization device for online production of fried food packaging bags, which adopts the following technical solution: A sterilizing device for online production of fried food packaging bags comprises a body, in which a first guide roller and a second guide roller are rotatably arranged, the first guide roller and the second guide roller are arranged in parallel and at the same height, a heating roller is rotatably arranged below the first guide roller and the second guide roller, a plurality of hydrogen peroxide atomizing nozzles are arranged on the side of the first guide roller away from the second guide roller, a tensioning roller for pressing the upper surface of food paper is arranged between the second guide roller and the heating roller, a plurality of exhaust holes are opened on the surface of the tensioning roller, and a water-absorbing and breathable sleeve is provided on the tensioning roller.

[0007] By adopting the above technical scheme, when in use, the hydrogen peroxide atomizing nozzle sprays the hydrogen peroxide atomizing solution onto the upper surface of the food paper to sterilize the upper surface of the food paper, and the food paper bypasses the first guide roller and is transported to the heating roller. The hydrogen peroxide solution on the surface of the food paper contacts the side wall of the heating roller and is decomposed into oxygen and water by heat, and part of the water remains on the upper surface of the food paper. The food paper continues to be transported to the tensioning roller, and the water-absorbing and breathable sleeve absorbs the water on the surface of the food paper. The air suction holes absorb the air on the outer peripheral side of the tensioning roller. On the one hand, it is used to remove the moist air on the upper surface of the food paper, which is beneficial to keep the surface of the food paper dry. On the other hand, the high-speed air circulation is beneficial to take away the moisture in the water-absorbing and breathable sleeve, and accelerate the drying of the water-absorbing and breathable sleeve.

[0008] Preferably, the heating roller includes a fixed shaft fixed in the body and a roller sleeve coaxially rotatably arranged on the fixed shaft, a mounting hole is opened at one end of the fixed shaft, an electric heating rod is installed in the mounting hole, a graphite filler layer is arranged between the roller sleeve and the fixed shaft, and rotating seals are installed at both ends between the heating roller sleeve and the fixed shaft.

[0009] By adopting the above technical solution, the use of the graphite filler layer is not only beneficial to reducing the rotation resistance of the roller sleeve, but also beneficial to the temperature of the fixed shaft being transferred to the roller sleeve.

[0010] Preferably, a negative pressure chamber connected to the multiple exhaust holes is opened in the tensioning roller, one end of the tensioning roller is connected to an exhaust pipe connected to the negative pressure chamber, the exhaust pipe is connected to the end of the mounting hole away from its opening, the inner wall of the mounting hole is opened along the length direction of the mounting hole with multiple connecting grooves for connecting the spaces at both ends of the electric heating rod in the mounting hole, the fixed shaft is connected to an exhaust pump at the opening of the mounting hole through a pipeline, and the exhaust end of the exhaust pump is connected to the outside of the fuselage through a pipeline.

[0011] By adopting the above technical solution, before the vacuum pump draws the air inside the fuselage and discharges it outside the fuselage, the air passes through the connecting groove, contacts the side wall of the electric heating rod, and is decomposed by heat, thereby preventing hydrogen peroxide from being discharged outside the fuselage and polluting the workshop.

[0012] Preferably, both ends of the fixed shaft are rotatably connected to a rocker rod, the tensioning roller is rotatably connected between the two rocker rods, both ends of the fixed shaft are fixed with a clamp, and a tension spring is connected between the clamp and the rocker rod.

[0013] By adopting the above technical solution, the tension spring pulls the swing rod to rotate, and the swing rod drives the tensioning roller to press tightly on the upper surface of the food paper.

[0014] Preferably, a high-pressure chamber is provided in the heating roller, a spiral fin is fixed in the high-pressure chamber, a plurality of jet holes connected to the high-pressure chamber are provided on the side wall of the heating roller, a vortex tube is provided in the fuselage, a compressed air inlet of the vortex tube is connected to a high-pressure gas tank through a pipeline, and a hot end pipe of the vortex tube is connected to the high-pressure chamber.

[0015] By adopting the above technical solution, the high-pressure gas tank supplies compressed air to the compressed air input port of the vortex tube, and the hot end tube of the vortex tube discharges a high-speed hot air flow, which contacts the spiral fins and heats the heating roller. After the heating roller is heated, it contacts the upper surface of the food paper, and the hydrogen peroxide solution is decomposed by the heat. At the same time, the hot air flow is also ejected from the air jet holes to directly heat the upper surfaces of the food paper on both sides, further promoting the decomposition of the hydrogen peroxide solution.

[0016] Preferably, the tensioning roller includes an inner tube and an outer tube coaxially arranged outside the inner tube, a negative pressure clamping cavity is formed between the inner tube and the outer tube, the exhaust hole is opened on the outer tube, the exhaust hole is connected with the negative pressure clamping cavity, the side wall of the inner tube is opened with an air suction hole for connecting the negative pressure clamping cavity with the inside of the inner tube, the cold end tube of the vortex tube is connected with the inner tube, and the end of the inner tube away from the vortex tube is connected to the outside of the fuselage through a pipe.

[0017] By adopting the above technical solution, while wiping the residual water on the surface of the food paper, refrigeration and air extraction are used to further dehumidify the surface of the food paper.

[0018] Preferably, a diameter-changing section is provided on the inner tube, the inner diameter of the diameter-changing section is smaller than the inner diameter of the inner tube, and the air suction hole is provided on the diameter-changing section.

[0019] By adopting the above technical solution, a negative pressure state is formed in the negative pressure clamp cavity.

[0020] Preferably, a thermal conductive rib is provided between the inner tube and the outer tube.

[0021] By adopting the above technical solution, the temperature of the outer tube is easily transferred to the inner tube through the thermal conductive ribs.

[0022] Preferably, spiral fins are provided at both ends of the variable diameter section in the inner tube.

[0023] By adopting the above technical solution, high-speed cold air fully contacts the spiral fins, absorbs the temperature of the spiral fins, inner tubes, heat transfer ribs and outer tubes, promotes the liquefaction of water in the surrounding air through refrigeration, and is more conducive to dehumidifying the upper surface of the food paper.

[0024] In summary, the present application includes at least one of the following beneficial technical effects: 1. The hydrogen peroxide sprayed on the surface of food paper by a hydrogen peroxide atomizing nozzle has high sterilization efficiency and meets the demand for rapid sterilization of food paper in online production; 2. Use the heating roller to heat the hydrogen peroxide to promote its decomposition and prevent it from remaining on the food paper. Then use the tensioning roller and the water-absorbing and breathable sleeve to wipe the surface of the food paper. At the same time, use the air extraction method to extract the moist air near the surface of the food paper to complete the dehumidification, which is conducive to restoring the food paper to a dry state. 3. Before the air in the fuselage is discharged outside the fuselage, it passes through the connecting groove. During this process, the air to be discharged contacts the side wall of the electric heating rod. The air in the fuselage is heated and then discharged, ensuring that the hydrogen peroxide solution suspended in the air is completely decomposed to avoid pollution in the workshop. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic diagram of the structure of a sterilization device for online production of fried food packaging bags according to Example 1 of the present application (in order to facilitate the display of the internal structure, the body is cut open for display); Figure 2 It is a cross-sectional view of a part of the structure in the first embodiment of the present application; Figure 3 is a cross-sectional view of the heating roller in the first embodiment of the present application; Figure 4 This is a partial structural diagram of Embodiment 2 of the present application; Figure 5 This is a schematic diagram of the structure of the heating roller in the second embodiment of the present application; Figure 6 This is a schematic diagram of the structure of the tensioning roller in the second embodiment of the present application; Reference numerals: 1, fuselage; 2, first guide roller; 3, second guide roller; 4, heating roller; 5, hydrogen peroxide atomizing nozzle; 6, tensioning roller; 7, air extraction hole; 8, water-absorbing and breathable sleeve; 9, fixed shaft; 10, roller sleeve; 11, mounting hole; 12, electric heating rod; 13, graphite packing layer; 14, rotating seal; 15, negative pressure chamber; 16, air extraction pipe; 17, connecting groove; 18, air extraction pump; 19, swing rod; 20. Clamp; 21. Tension spring; 22. High-pressure chamber; 23. Spiral fins; 24. Jet hole; 25. Vortex tube; 26. High-pressure gas tank; 27. Inner tube; 28. Outer tube; 29. ​​Negative pressure clamp chamber; 30. Intake hole; 31. Variable diameter section; 32. Thermal ribs; 33. Spiral fins; 34. Air compressor; 35. Compressed air inlet; 36. Hot end tube; 37. Cold end tube; 38. Support seat. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-Figure 6 This application is described in further detail.

[0027] The embodiment of the present application discloses a sterilization device for online production of fried food packaging bags.

[0028] Embodiment 1 Reference Figure 1 and Figure 2 A sterilizing device for online production of fried food packaging bags comprises a body 1, in which a first guide roller 2 and a second guide roller 3 are rotatably installed, the first guide roller 2 and the second guide roller 3 are arranged in parallel and at the same height, a heating roller 4 is rotatably installed below the first guide roller 2 and the second guide roller 3, a plurality of hydrogen peroxide atomizing nozzles 5 are installed on the side of the first guide roller 2 away from the second guide roller 3, and the plurality of hydrogen peroxide atomizing nozzles 5 are arranged along the width direction of food paper, a tensioning roller 6 for pressing the upper surface of food paper is arranged between the second guide roller 3 and the heating roller 4, a plurality of exhaust holes 7 are opened on the surface of the tensioning roller 6, a water-absorbing and breathable sleeve 8 is sleeved on the tensioning roller 6, and the water-absorbing and breathable sleeve 8 is made of cotton cloth.

[0029] Reference Figure 1 and Figure 3 The heating roller 4 includes a fixed shaft 9 fixed in the body 1 and a roller sleeve 10 coaxially rotatably arranged on the fixed shaft 9. Support seats 38 are arranged at both ends of the fixed shaft 9. The fixed shaft 9 is horizontally fixed between the two support seats 38. A mounting hole 11 is opened at one end of the fixed shaft 9. An electric heating rod 12 is installed in the mounting hole 11. A graphite packing layer 13 is arranged between the roller sleeve 10 and the fixed shaft 9. The graphite packing layer 13 has the advantages of good thermal conductivity and small sliding resistance. Rotary seals 14 are installed at both ends between the heating roller 4 sleeve and the fixed shaft 9. The rotary seals 14 are used to support the coaxial rotation of the heating roller 4 sleeve on the fixed shaft 9 and prevent leakage of the graphite packing layer 13.

[0030] Reference Figure 1 and Figure 2 A negative pressure chamber 15 connected to a plurality of exhaust holes 7 is provided in the tensioning roller 6, and an exhaust pipe 16 connected to the negative pressure chamber 15 is connected to one end of the tensioning roller 6. The exhaust pipe 16 is connected to an end of the mounting hole 11 away from its opening. A plurality of connecting grooves 17 for connecting the spaces at both ends of the electric heating rod 12 in the mounting hole 11 are provided on the inner wall of the mounting hole 11 along the length direction of the mounting hole 11. An exhaust pump 18 is connected to the opening of the mounting hole 11 through a pipeline with the fixed shaft 9, and the exhaust end of the exhaust pump 18 is connected to the outside of the fuselage 1 through a pipeline.

[0031] Reference Figure 1 and Figure 2 Both ends of the fixed shaft 9 are rotatably connected with a rocker rod 19, one end of the rocker rod 19 is rotatably connected to the fixed shaft 9, and the other end is freely set, the tensioning roller 6 is rotatably connected between the two rocker rods 19, and both ends of the fixed shaft 9 are fixed with a clamp 20, and a tension spring 21 is connected between the clamp 20 and the rocker rod 19.

[0032] The working principle of the first embodiment of the present application is as follows: when in use, the food paper roll is pulled out, and is successively passed through the hydrogen peroxide atomizing nozzle 5, the first guide roller 2, the heating roller 4, the tensioning roller 6 and the second guide roller 3, and then output to the production line for subsequent folding, heating, pasting and cutting to make a food bag; wherein, the food paper is fed into the machine body 1 with the side provided with the plastic composite film facing upward, the hydrogen peroxide atomizing nozzle 5 atomizes the hydrogen peroxide solution and sprays it onto the upper surface of the food paper, and the food paper then bypasses the first guide roller 2 and is fed to the heating roller 4, the electric heating rod 12 is energized, and the heating roller 4 is heated. The temperature rises, heating the upper surface of the food paper, and hydrogen peroxide is decomposed into oxygen and water by heat. The food paper continues to be transported to the tension roller 6. Under the action of the tension spring 21, the tension roller 6 presses the upper surface of the food paper to stretch the food paper. At the same time, the water-absorbing and breathable sleeve 8 absorbs the water on the upper surface of the food paper, and the vacuum pump 18 works. The mounting hole 11 and the negative pressure chamber 15 are both in a negative pressure state. The air around the tension roller 6 passes through the water-absorbing and breathable sleeve 8, and passes through the vacuum hole 7, the negative pressure chamber 15, the vacuum pipe 16 and the mounting hole 11 in sequence, and is discharged to the outside of the machine body 1 by the vacuum pump 18.

[0033] The first embodiment of the present application has at least the following beneficial effects: Firstly, the hydrogen peroxide sprayed on the surface of the food paper by the hydrogen peroxide atomizing nozzle 5 has high sterilization efficiency, which meets the demand for rapid sterilization of food paper in online production; Secondly, the heating roller 4 is used to heat the hydrogen peroxide to promote its decomposition and prevent the hydrogen peroxide from remaining on the food paper. Then, the tension roller 6 and the water-absorbing and breathable sleeve 8 are used to wipe the surface of the food paper. At the same time, the moist air near the surface of the food paper is sucked away by the exhaust method to complete the dehumidification, which is conducive to restoring the food paper to a dry state. Thirdly, by providing the air extraction holes 7, the air flow is accelerated to take away the water in the water-absorbing and breathable sleeve 8; Fourthly, the vacuum pump 18 is operated to maintain negative pressure in the fuselage 1 to prevent the atomized hydrogen peroxide from overflowing and polluting the workshop; Fifth, before the air in the fuselage 1 is discharged outside the fuselage 1, it passes through the connecting groove 17. During this process, the air to be discharged contacts the side wall of the electric heating rod 12, and the air in the fuselage 1 is heated and then discharged, ensuring that the hydrogen peroxide solution suspended in the air is completely decomposed to avoid pollution of the workshop.

[0034] Embodiment 2 Reference Figure 4 and Figure 5, a sterilization device for online production of fried food packaging bags, which is different from the first embodiment in that support seats 38 are provided at both ends of a heating roller 4 in a fuselage 1, and the heating roller 4 is rotatably connected between the two support seats 38, a high-pressure chamber 22 is provided in the heating roller 4, a spiral fin 23 is fixed in the high-pressure chamber 22, a plurality of air injection holes 24 connected to the high-pressure chamber 22 are provided on the side wall of the heating roller 4, a vortex tube 25 is installed in the fuselage 1, a compressed air input port 35 of the vortex tube 25 is connected to a high-pressure gas tank 26 through a pipeline, the high-pressure gas tank 26 is connected to an air compressor 34 through a pipeline, and a hot end pipe 36 of the vortex tube 25 is connected to the high-pressure chamber 22.

[0035] Reference Figure 4 and Figure 6 The end of the swing rod 19 away from the tension roller 6 is rotatably connected to the support seat 38, and the two ends of the tension spring 21 are respectively fixed to the swing rod 19 and the support seat 38. The tension roller 6 includes an inner tube 27 and an outer tube 28 coaxially arranged outside the inner tube 27. The outer tube 28 is provided with a water-absorbing and breathable sleeve 8. A negative pressure clamping cavity 29 is formed between the inner tube 27 and the outer tube 28. A thermal conductive rib 32 is fixed between the inner tube 27 and the outer tube 28. The exhaust hole 7 is opened on the outer tube 28, and the exhaust hole 7 and the negative pressure clamping cavity 29 are connected. The inner tube 27 is connected, and a reducing section 31 is provided on the inner tube 27. The inner diameter of the reducing section 31 is smaller than the inner diameter of the inner tube 27. The side wall of the reducing section 31 is provided with an air intake hole 30 for connecting the negative pressure clamping cavity 29 with the inside of the inner tube 27. Spiral fins 33 are provided at both ends of the reducing section 31 in the inner tube 27. The spiral fins 33 are fixed to the inner wall of the inner tube 27. The cold end tube 37 of the vortex tube 25 is connected to the inner tube 27, and one end of the inner tube 27 away from the vortex tube 25 is connected to the outside of the fuselage 1 through a pipeline.

[0036] The implementation principle of a sterilization device for online production of fried food packaging bags in the embodiment of the present application is as follows: when in use, the air compressor 34 works to compress the air and store it in the high-pressure gas tank 26. The high-pressure air in the high-pressure gas tank 26 is then sent to the compressed air input port 35 of the vortex tube 25 through a pipeline. Then the hot end pipe 36 of the vortex tube 25 discharges high-speed hot air, and the cold end pipe 37 of the vortex tube 25 discharges high-speed cold air. The hot end pipe 36 of the vortex tube 25 is connected to the high-pressure chamber 22. The high-speed hot air is sent into the high-pressure chamber 22, fully contacts the spiral fins 23, heats the spiral fins 23 and the heating roller 4, and the temperature of the heating roller 4 increases. After the heating roller 4 contacts the surface of the food paper, the hydrogen peroxide solution on the surface is heated to promote the decomposition of the hydrogen peroxide solution. At the same time, the hot air will also be ejected from the jet hole 24 to heat the air around the heating roller 4. At the same time, the hot air will be blown to the upper surface of the food paper to further fully heat the surface of the food paper to promote the decomposition of the hydrogen peroxide solution.

[0037] At the same time, the cold end tube 37 of the vortex tube 25 is connected to the inner tube 27, and the high-speed cold air passes through the reducing section 31. Under the Venturi effect, the air around the tension roller 6 is sucked into the negative pressure clamping chamber 29, and the air in the negative pressure clamping chamber 29 is sucked into the reducing section 31. The air around the tension roller 6 is discharged to the outside of the fuselage 1 along with the high-speed cold air. Synchronously, the high-speed cold air fully contacts the spiral fins 33, absorbs the temperature of the spiral fins 33, the inner tube 27, the heat transfer ribs 32 and the outer tube 28, and the air around the tensioning roller 6 is cooled and liquefied, and then sucked into the negative pressure clamping chamber 29, thereby better dehumidifying the surface of the food paper.

[0038] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A sterilizing device for online production of fried food packaging bags, characterized in that: The invention comprises a machine body (1), wherein a first guide roller (2) and a second guide roller (3) are rotatably arranged in the machine body (1), wherein the first guide roller (2) and the second guide roller (3) are arranged in parallel and at the same height, wherein a heating roller (4) is rotatably arranged below the first guide roller (2) and the second guide roller (3), wherein a plurality of hydrogen peroxide atomizing nozzles (5) are arranged on the side of the first guide roller (2) away from the second guide roller (3), wherein a tensioning roller (6) for pressing the upper surface of the food paper is arranged between the second guide roller (3) and the heating roller (4), wherein a plurality of air extraction holes (7) are provided on the surface of the tensioning roller (6), and a water-absorbing and breathable sleeve (8) is provided on the tensioning roller (6).

2. A sterilizing device for online production of fried food packaging bags according to claim 1, characterized in that: The heating roller (4) comprises a fixed shaft (9) fixed in the machine body (1) and a roller sleeve (10) coaxially rotatably arranged on the fixed shaft (9); a mounting hole (11) is provided at one end of the fixed shaft (9); an electric heating rod (12) is installed in the mounting hole (11); a graphite filler layer (13) is provided between the roller sleeve (10) and the fixed shaft (9); and rotating seals (14) are installed at both ends between the heating roller (4) sleeve and the fixed shaft (9).

3. A sterilizing device for online production of fried food packaging bags according to claim 2, characterized in that: A negative pressure chamber (15) connected to the plurality of exhaust holes (7) is provided in the tensioning roller (6); one end of the tensioning roller (6) is connected to an exhaust pipe (16) connected to the negative pressure chamber (15); the exhaust pipe (16) is connected to an end of the mounting hole (11) away from its opening; the inner wall of the mounting hole (11) is provided with a plurality of connecting grooves (17) along the length direction of the mounting hole (11) for connecting the spaces at both ends of the electric heating rod (12) in the mounting hole (11); the fixed shaft (9) is connected to an exhaust pump (18) at the opening of the mounting hole (11) through a pipeline; the exhaust end of the exhaust pump (18) is connected to the outside of the fuselage (1) through a pipeline.

4. A sterilizing device for online production of fried food packaging bags according to claim 3, characterized in that: Both ends of the fixed shaft (9) are rotatably connected to a swing rod (19), the tensioning roller (6) is rotatably connected between the two swing rods (19), and both ends of the fixed shaft (9) are fixed with a clamp (20), and a tension spring (21) is connected between the clamp (20) and the swing rod (19).

5. The sterilizing device for online production of fried food packaging bags according to claim 1, characterized in that: The heating roller (4) is provided with a high-pressure chamber (22), a spiral fin (23) is fixed in the high-pressure chamber (22), a side wall of the heating roller (4) is provided with a plurality of jet holes (24) connected to the high-pressure chamber (22), a vortex tube (25) is provided in the fuselage (1), a compressed air input port (35) of the vortex tube (25) is connected to a high-pressure gas tank (26) through a pipeline, and a hot end pipe (36) of the vortex tube (25) is connected to the high-pressure chamber (22).

6. A sterilizing device for online production of fried food packaging bags according to claim 5, characterized in that: The tensioning roller (6) comprises an inner tube (27) and an outer tube (28) coaxially arranged outside the inner tube (27); a negative pressure clamping cavity (29) is formed between the inner tube (27) and the outer tube (28); the air suction hole (7) is provided on the outer tube (28); the air suction hole (7) is communicated with the negative pressure clamping cavity (29); a suction hole (30) for communicating the negative pressure clamping cavity (29) with the inside of the inner tube (27) is provided on the side wall of the inner tube (27); the cold end tube (37) of the vortex tube (25) is communicated with the inner tube (27); and one end of the inner tube (27) away from the vortex tube (25) is connected to the outside of the fuselage (1) through a pipeline.

7. A sterilizing device for online production of fried food packaging bags according to claim 6, characterized in that: The inner tube (27) is provided with a diameter-changing section (31), the inner diameter of the diameter-changing section (31) is smaller than the inner diameter of the inner tube (27), and the air suction hole (30) is provided on the diameter-changing section (31).

8. A sterilizing device for online production of fried food packaging bags according to claim 6 or 7, characterized in that: A thermal conductive rib (32) is provided between the inner tube (27) and the outer tube (28).

9. The sterilizing device for online production of fried food packaging bags according to claim 7, characterized in that: The inner tube (27) is provided with spiral fins (33) at both ends of the diameter-changing section (31).

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