Film corona waste gas extraction device

Abstract

The invention relates to the technical field of film corona, in particular to a film corona waste gas extraction device which comprises a box body, and a corona roller is rotatably mounted in the box body; the waste gas treatment mechanism is arranged in the box body; the corona generation mechanism is used for film corona; the circulating mechanism is used for circulating the gas; wherein the corona generating mechanism comprises a connecting plate, the bottom of the connecting plate is fixedly connected with a plurality of electrodes, and the plurality of electrodes are distributed in an array. According to the thin film corona waste gas extraction device, ozone can be collected and converted in real time through cooperation of the waste gas treatment mechanism and the circulating mechanism, and the ozone is prevented from making contact with equipment and a human body, so that damage to the mechanical equipment and the human body caused by the ozone is avoided. In addition, through gas circulation, the ozone content between the corona generation mechanism and the corona roller reaches dynamic balance, and the uniformity and consistency of the corona effect of each part of the film are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of thin-film corona technology, in particular to a thin-film corona waste gas extraction device. Background Art

[0002] During the production of plastic film, corona treatment is required to break the chemical bonds of plastic molecules and degrade them, thereby increasing the adhesion of the surface. A large amount of ozone is generated during corona discharge. Ozone is a strong oxidant that can oxidize plastic molecules and produce highly polar groups such as carbonyl and peroxide, thereby increasing its surface energy.

[0003] However, as the corona time increases, the ozone concentration between the electrode and the corona roller is bound to increase. Excessive ozone may cause excessive oxidation of the material surface, affecting the mechanical properties and appearance of the material. At the same time, it will cause too many polar functional groups to be electret on the material surface, affecting the subsequent printing effect. As the corona time increases, the ozone content will continue to accumulate, resulting in different corona effects at different locations on the film, affecting the consistency of the film corona. In addition, ozone is a strong oxidant and will corrode the equipment.

[0004] The existing thin film corona equipment is equipped with a fan outside the equipment to extract the diffused ozone, which cannot prevent ozone from contacting the equipment. At the same time, due to the large ozone diffusion area, the treatment effect of the existing equipment is difficult to guarantee. During use, a small amount of ozone will diffuse into the air, causing harm to the workers. In view of this, we propose a thin film corona exhaust gas extraction device. Summary of the invention

[0005] The purpose of the embodiment of the present invention is to provide a thin film corona exhaust gas extraction device, which solves the problem that the existing thin film corona equipment has poor ozone treatment effect, resulting in ozone contact with the equipment and the human body.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A thin-film corona exhaust gas extraction device comprises a box body, in which a corona roller is rotatably mounted;

[0008] An exhaust gas treatment mechanism is disposed in the box;

[0009] Corona generating mechanism, used for film corona;

[0010] A circulation mechanism, used for circulating the gas;

[0011] Wherein, the corona generating mechanism comprises a connecting plate, a plurality of electrodes are fixedly connected to the bottom of the connecting plate, and the plurality of electrodes are distributed in an array;

[0012] The exhaust gas treatment mechanism includes a fixed shell with a hollow interior, with both ends of the fixed shell fixedly mounted on the inner wall of the box body, and the internal space of the fixed shell is divided into a first chamber and a second chamber by an isolation component, and a decomposition component is arranged in the first chamber for decomposing ozone into oxygen.

[0013] Preferably, the connecting plate is fixedly connected to the bottom of the fixed shell;

[0014] An isolation box is fixedly connected to the inner bottom wall of the fixed shell, and a plurality of air blowing heads are fixedly connected to the inner bottom wall of the fixed shell. The air blowing heads are located between the electrodes, the top ends of the air blowing heads are connected to the inside of the isolation box, and the bottom ends penetrate the connecting plate and are connected to the outside of the connecting plate.

[0015] Preferably, two symmetrical air extraction shells are fixedly connected to the inner bottom wall of the fixed shell, the two air extraction shells are arranged on both sides of the connecting plate, the air extraction shells are connected from top to bottom, and the top is connected to the second chamber.

[0016] Preferably, the isolation assembly comprises a fixing plate, the fixing plate is fixedly connected to the inner wall of the fixing shell, the fixing plate is provided with a first through slot and a second through slot, the bottom of the fixing plate is fixedly connected to an isolation frame, and the isolation frame is located below the second through slot;

[0017] The decomposition component is arranged above the second through groove and is used for reducing the ozone entering the first chamber.

[0018] Preferably, the circulation mechanism comprises a pump body, which is fixedly mounted on the box body, wherein the input end of the pump body is connected to the interior of the isolation frame through an exhaust pipe, and the output end of the pump body is connected to the interior of the isolation box through an exhaust pipe.

[0019] Preferably, the decomposition component includes a processing box, which is inserted into the fixed shell and one end of the processing box is connected to the fixed shell through a limiting component to facilitate installation and disassembly of the processing box. The interior of the processing box is filled with catalytic filler, and open grooves are equidistantly provided on the surface of the fixed shell.

[0020] Preferably, a dehumidification layer is provided inside the processing box to remove water molecules in the gas to avoid affecting the quality of the corona due to the presence of moisture.

[0021] Preferably, a positioning groove is provided on one side of the fixing plate away from the isolation frame, the positioning groove is located above the second through groove, and the bottom end of the processing box is embedded in the positioning groove to realize the positioning of the processing box.

[0022] Preferably, the limiting assembly comprises a limiting frame, and the limiting frame is rotatably connected to one end of the processing box via a rotating shaft;

[0023] The fixed shell is provided with a limiting groove, and one end of the limiting frame is located in the limiting groove, which can limit the relative movement between the processing box and the fixed shell, thereby realizing the limiting of the processing box.

[0024] Preferably, the limiting frame is elastically connected to the processing box via a torsion spring, and a handle is fixedly connected to the limiting frame to facilitate manual rotation of the limiting frame so that the limiting frame is disengaged from the limiting groove.

[0025] By means of the above technical solution, the present invention provides a thin film corona exhaust gas extraction device, which has at least the following beneficial effects:

[0026] (1) The film corona exhaust gas extraction device can collect and transform ozone in real time through the cooperation of the exhaust gas treatment mechanism and the circulation mechanism, preventing ozone from contacting equipment and human body, thereby avoiding ozone from causing harm to mechanical equipment and human body. In addition, through gas circulation, the ozone content between the corona generating mechanism and the corona roller reaches a dynamic balance, ensuring the uniformity of the corona effect at all parts of the film.

[0027] (2) The thin-film corona exhaust gas extraction device can fix the decomposition component on the fixed shell by setting a limit component, which is convenient for installation and disassembly of the decomposition component, and further convenient for processing and replacement of the catalytic filler inside the decomposition component, thereby improving the convenience of use.

[0028] (3) The thin film corona waste gas extraction device can remove moisture from the gas during the gas circulation process by setting a dehumidification layer inside the treatment box, thereby avoiding the influence of the presence of moisture on the quality of the corona, thereby making the corona effect more stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application:

[0030] Figure 1 A schematic diagram of the overall structure of an embodiment of the present invention from a first viewing angle;

[0031] Figure 2 is a cross-sectional view of a box body in an embodiment of the present invention;

[0032] Figure 3 A second viewing angle schematic diagram of the overall structure of an embodiment of the present invention;

[0033] Figure 4 It is a schematic diagram of some structures in an embodiment of the present invention;

[0034] Figure 5 This is a schematic diagram of the bottom of the connecting plate in an embodiment of the present invention;

[0035] Figure 6An exploded view of a corona generating mechanism and an exhaust gas treatment mechanism in an embodiment of the present invention;

[0036] Figure 7 is a cross-sectional view of an exhaust gas treatment mechanism according to an embodiment of the present invention;

[0037] Figure 8 It is a schematic diagram of an isolation component and a decomposition component in an embodiment of the present invention;

[0038] Fig. 9 Schematic diagram of an isolation box and a processing box in an embodiment of the present invention;

[0039] Fig.10 is a schematic diagram of a limit assembly in an embodiment of the present invention;

[0040] Fig.11 Schematic diagram of the circulation mechanism in an embodiment of the present invention.

[0041] In the figure: 1. box body; 2. corona roller; 3. exhaust gas treatment mechanism; 31. fixed shell; 311. first chamber; 312. second chamber; 32. exhaust shell; 33. isolation box; 34. blowing head; 35. isolation component; 351. fixed plate; 3511. first through groove; 3512. second through groove; 3513. positioning groove; 352. isolation frame; 36. decomposition component; 361. treatment box; 362. catalytic filler; 3611. open groove; 363. dehumidification layer; 37. limiting component; 371. rotating shaft; 372. limiting frame; 373. torsion spring; 374. handle; 38. limiting groove; 4. corona generating mechanism; 41. corona generating module; 42. connecting plate; 43. electrode; 44. conductor; 5. circulation mechanism; 51. pump body; 52. exhaust pipe; 53. exhaust pipe. DETAILED DESCRIPTION

[0042] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0043] A large amount of ozone is generated during the corona treatment of plastic film. As the corona time increases, the ozone concentration between the electrode and the corona roller is bound to increase, which will have an adverse effect on the mechanical properties, appearance and corona consistency of the film, and at the same time, cause harm to the equipment and human body. However, the existing film corona equipment is equipped with a fan outside the equipment, which cannot prevent ozone from contacting the equipment during use, and a small amount of ozone will diffuse into the air, causing harm to the workers.

[0044] For this reason, please see Figure 1-Figure 11 , we propose a thin film corona exhaust gas extraction device.

[0045] The film corona exhaust gas extraction device comprises a box body 1, and rectangular openings are provided on opposite sides of the box body 1 for the film to pass through. A corona roller 2 and at least one guide roller for guiding the film are rotatably installed in the box body 1, so that the film passes through the box body 1 along a specified path. A corona generating mechanism 4 is provided in the box body 1 for performing corona treatment on the moving film.

[0046] In this embodiment, the corona generating mechanism 4 includes a corona generating module 41, which is fixedly installed in the box 1. The bottom of the corona generating module 41 is connected to a connecting plate 42 through a conductor 44. The bottom of the connecting plate 42 is fixedly connected to multiple electrodes 43, which are distributed in an array to apply corona to the film.

[0047] Ozone is continuously generated during the corona process. By setting a relatively closed box 1, ozone can be prevented from diffusing into the air and causing environmental pollution. The air flow inside and outside the box 1 is poor. As the corona time increases, excessive ozone will accumulate between the corona generating mechanism 4 and the corona roller 2, causing adverse effects.

[0048] To this end, an exhaust gas treatment mechanism 3 is provided in the box 1 to collect and treat ozone in the corona process. The exhaust gas treatment mechanism 3 is provided in the corona area, and can collect and transform ozone in real time to prevent ozone from contacting equipment and human body, and eliminate the adverse effects of ozone. In addition, a circulation mechanism 5 is also provided to circulate the gas. During the circulation process, the ozone content between the corona generating mechanism 4 and the corona roller 2 reaches a dynamic balance, and the uniformity of the corona effect at various locations of the film is ensured.

[0049] Specifically, the exhaust gas treatment mechanism 3 includes a fixed shell 31 with a hollow interior, the two ends of the fixed shell 31 are fixedly mounted on the inner wall of the box body 1, and one end thereof penetrates the box body 1, so as to facilitate the disassembly of its internal structure. The connecting plate 42 is fixedly connected to the bottom of the fixed shell 31, and the electrodes 43 are concentrated in the middle position of the bottom of the fixed shell 31, so that the exhaust gas treatment mechanism 3 can timely process the ozone generated in the corona area to prevent the ozone from escaping outside the area, thereby preventing the ozone from contacting the equipment or the human body, and improving the safety during the corona process.

[0050] See also Figure 7 The internal space of the fixed shell 31 is divided into a first chamber 311 and a second chamber 312 by an isolation component 35. The first chamber 311 is located above the second chamber 312. A decomposition component 36 is arranged in the first chamber 311 for decomposing ozone into oxygen.

[0051] See also Figure 8The isolation assembly 35 includes a fixing plate 351, which is fixedly connected to the inner wall of the fixing shell 31. The first chamber 311 is located above the fixing plate 351, and the second chamber 312 is located below the fixing plate 351. The fixing plate 351 is provided with two first through slots 3511 and a plurality of second through slots 3512, which are distributed in a rectangular array. The two first through slots 3511 are arranged on both sides of the matrix, so that the gas can flow between the first chamber 311 and the second chamber 312. The decomposition assembly 36 is arranged above the second through slots 3512, and is used to reduce the ozone entering the first chamber 311.

[0052] Specifically, the decomposition component 36 includes a processing box 361, which is in the shape of a long strip. The processing box 361 is filled with a catalytic filler 362. The processing box 361 is inserted into the fixed shell 31, and one end of the processing box 361 is connected to the fixed shell 31 through a limit assembly 37, which is convenient for installing and disassembling the processing box 361, and then processing and replacing the catalytic filler 362, thereby improving the convenience of use. Open grooves 3611 are equidistantly provided on the surface of the fixed shell 31, so that gas can enter and exit the processing box 361. A dehumidification layer 363 is provided inside the processing box 361 to remove water molecules in the gas to avoid affecting the quality of the corona due to the presence of moisture. A positioning groove 3513 is provided on the top of the fixed plate 351, and the positioning groove 3513 is located above the second through groove 3512. The bottom end of the processing box 361 is embedded in the positioning groove 3513 to achieve the positioning of the processing box 361.

[0053] As an embodiment, the limiting assembly 37 includes a limiting frame 372, and the limiting frame 372 is rotatably connected to one end of the processing box 361 through a rotating shaft 371. A limiting groove 38 is provided on the fixed shell 31, and one end of the limiting frame 372 is located in the limiting groove 38. The limiting groove 38 is arc-shaped, and one end of the limiting frame 372 can rotate in the limiting groove 38. When the limiting frame 372 rotates to the inside of the limiting groove 38, the relative movement of the processing box 361 and the fixed shell 31 can be limited to achieve the limiting of the processing box 361. When the limiting frame 372 rotates out of the limiting groove 38, the limiting effect can be released, so that the processing box 361 can be drawn out of the fixed shell 31. The limit frame 372 is elastically connected to the processing box 361 through the torsion spring 373. By setting the torsion spring 373, the limit frame 372 can automatically reset after losing the external force restriction, so that the bottom end of the limit frame 372 can enter the limit groove 38. A handle 374 is fixedly connected to the limit frame 372 to facilitate manual rotation of the limit frame 372 so that the limit frame 372 can be disengaged from the limit groove 38.

[0054] Furthermore, an isolation frame 352 is fixedly connected to the bottom of the fixed plate 351, and the isolation frame 352 is located below the second through groove 3512. The gas processed by the decomposition component 36 can enter the isolation frame 352 for collection. An isolation box 33 is fixedly connected to the inner bottom wall of the fixed shell 31, and a plurality of air blowing heads 34 are fixedly connected to the inner bottom wall of the fixed shell 31. The air blowing heads 34 are located between the electrodes 43, so that the blown gas enters between the electrodes 43 and the corona roller 2 in a uniform and dispersed manner, so that the gas distribution between the electrodes 43 is more uniform, thereby improving the uniformity and consistency of the corona effect at various locations of the film. The top of the air blowing head 34 is connected to the inside of the isolation box 33, and the bottom end passes through the connecting plate 42 and is connected to the outside of the connecting plate 42, so that the gas to be ionized can be blown into between the electrode 43 and the corona roller 2. Two symmetrical exhaust shells 32 are fixedly connected to the inner bottom wall of the fixed shell 31. The two exhaust shells 32 are arranged on both sides of the connecting plate 42. The exhaust shells 32 are connected from top to bottom, and the top is connected to the second chamber 312, and the bottom is connected to the external space of the device, so as to collect ozone so that ozone enters the second chamber 312 through the exhaust shells 32.

[0055] As an embodiment, a circulation mechanism 5 is also provided in the housing 1 for circulating the gas. The circulation mechanism 5 includes a pump body 51, which is fixedly mounted on the housing 1. The input end of the pump body 51 is connected to the interior of the isolation frame 352 through an exhaust pipe 52 to provide suction force, so as to draw ozone from the exhaust shell 32 into the fixed shell 31, and cause the ozone to enter the isolation frame 352 after being decomposed by the decomposition component 36. The output end of the pump body 51 is connected to the interior of the isolation box 33 through an exhaust pipe 53, thereby providing pressure for the decomposed gas, so that the gas is blown out from the blowing head 34 and re-enters the corona area. In addition, the exhaust pipe 53 can also be connected to the outside to replenish gas in the device to avoid a decrease in the corona effect due to gas consumption.

[0056] When the thin film corona exhaust gas extraction device of the present invention is in use, the corona generating mechanism 4 releases high frequency and high voltage through the electrode 43 to perform corona treatment on the thin film on the surface of the corona roller 2, and ozone is generated during the corona treatment.

[0057] Start the pump body 51, and the input end of the pump body 51 sucks the gas in the isolation frame 352 through the exhaust pipe 52, so that negative pressure is generated in the isolation frame 352, so that the ozone between the electrode 43 and the corona roller 2 passes through the exhaust shell 32, the second chamber 312, and the first through groove 3511 in turn into the first chamber 311, and then enters the treatment box 361 through the open groove 3611, and is decomposed into oxygen after passing through the catalytic filler 362. After the water vapor mixed in the gas is absorbed by the dehumidification layer 363, the remaining dry gas enters the isolation frame 352, and enters the pump body 51 through the exhaust pipe 52, and is discharged into the isolation box 33 through the exhaust pipe 53 at the output end of the pump body 51, and finally re-enters between the electrode 43 and the corona roller 2 through the blowing head 34 at the bottom of the fixed shell 31.

[0058] After a period of use, the effect of the catalytic filler 362 will decrease, and it can be replaced. The specific method is: turn the handle 374, and the handle 374 drives the limit frame 372 to rotate through the rotating shaft 371, so that the bottom end of the limit frame 372 is disengaged from the limit groove 38 to release the limit effect between the treatment box 361 and the fixed shell 31. At this time, the handle 374 can be pulled outward to pull the entire treatment box 361 out of the fixed shell 31. Subsequently, a new decomposition component 36 is inserted into the fixed shell 31, and the handle 374 is released. The limit frame 372 will automatically rotate under the elastic force of the torsion spring 373 and enter the limit groove 38 to limit the relative movement between the treatment box 361 and the fixed shell 31.

[0059] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A thin film corona exhaust gas extraction device, characterized in that: include: A box body (1), wherein a corona roller (2) is rotatably mounted in the box body (1); An exhaust gas treatment mechanism (3) is arranged in the box (1); A corona generating mechanism (4) for film corona; A circulation mechanism (5) for circulating the gas; The corona generating mechanism (4) comprises a connecting plate (42), a plurality of electrodes (43) are fixedly connected to the bottom of the connecting plate (42), and the plurality of electrodes (43) are distributed in an array; The exhaust gas treatment mechanism (3) comprises a fixed shell (31) with a hollow interior, wherein both ends of the fixed shell (31) are fixedly mounted on the inner wall of the box body (1), and the internal space of the fixed shell (31) is divided into a first chamber (311) and a second chamber (312) by an isolation component (35), wherein a decomposition component (36) is arranged in the first chamber (311).

2. The thin film corona exhaust gas extraction device according to claim 1, characterized in that: The connecting plate (42) is fixedly connected to the bottom of the fixed shell (31); An isolation box (33) is fixedly connected to the inner bottom wall of the fixed shell (31), and a plurality of air blowing heads (34) are fixedly connected to the inner bottom wall of the fixed shell (31). The air blowing heads (34) are located between the electrodes (43), and the top ends of the air blowing heads (34) are connected to the inside of the isolation box (33), and the bottom ends of the air blowing heads (34) pass through the connecting plate (42) and are connected to the outside of the connecting plate (42).

3. The thin film corona exhaust gas extraction device according to claim 2, characterized in that: Two symmetrical air extraction shells (32) are fixedly connected to the inner bottom wall of the fixed shell (31). The two air extraction shells (32) are arranged on both sides of the connecting plate (42). The air extraction shells (32) are connected from top to bottom and the top is connected to the second chamber (312).

4. The thin film corona exhaust gas extraction device according to claim 3, characterized in that: The isolation assembly (35) comprises a fixing plate (351), the fixing plate (351) is fixedly connected to the inner wall of the fixing shell (31), a first through slot (3511) and a second through slot (3512) are formed on the fixing plate (351), an isolation frame (352) is fixedly connected to the bottom of the fixing plate (351), and the isolation frame (352) is located below the second through slot (3512); The decomposition component (36) is arranged above the second through groove (3512).

5. The thin film corona exhaust gas extraction device according to claim 4, characterized in that: The circulation mechanism (5) comprises a pump body (51), wherein the pump body (51) is fixedly mounted on the box body (1); the input end of the pump body (51) is connected to the interior of the isolation frame (352) through an exhaust pipe (52), and the output end of the pump body (51) is connected to the interior of the isolation box (33) through an exhaust pipe (53).

6. The thin film corona exhaust gas extraction device according to claim 4, characterized in that: The decomposition component (36) comprises a treatment box (361), the treatment box (361) is inserted into the fixed shell (31), and one end of the treatment box (361) is connected to the fixed shell (31) through a limit assembly (37), the interior of the treatment box (361) is filled with catalytic filler (362), and the surface of the fixed shell (31) is provided with open grooves (3611) at equal intervals.

7. The thin film corona exhaust gas extraction device according to claim 6, characterized in that: A dehumidification layer (363) is provided inside the processing box (361).

8. The thin film corona exhaust gas extraction device according to claim 6, characterized in that: A positioning groove (3513) is provided on one side of the fixing plate (351) away from the isolation frame (352), the positioning groove (3513) is located above the second through groove (3512), and the bottom end of the processing box (361) is embedded in the positioning groove (3513).

9. The thin film corona exhaust gas extraction device according to claim 6, characterized in that: The limiting assembly (37) comprises a limiting frame (372), and the limiting frame (372) is rotatably connected to one end of the processing box (361) via a rotating shaft (371); The fixed shell (31) is provided with a limiting groove (38), and one end of the limiting frame (372) is located in the limiting groove (38).

10. The thin-film corona exhaust gas extraction device according to claim 9, characterized in that: The limiting frame (372) is elastically connected to the processing box (361) via a torsion spring (373), and a handle (374) is fixedly connected to the limiting frame (372).

Images