Membrane changing device capable of preventing observation window from being polluted

Abstract

The utility model relates to a membrane changing device for preventing an observation window from being polluted. The membrane changing device capable of preventing the observation window from being polluted is arranged in a spraying room and comprises a membrane discharging structure and a membrane collecting structure, one of the membrane discharging structure and the membrane collecting structure is arranged above the observation window, and the other one of the membrane discharging structure and the membrane collecting structure is arranged below the observation window. The film discharging structure comprises a feeding shaft, the feeding shaft is used for fixing a winding drum with a film, and a film discharging unit used for extruding the film is arranged between the feeding shaft and the film collecting structure; the film winding structure comprises a film winding roller for winding the film, the film outlet end of the film is fixedly connected to the film winding roller, and the film is wound on the film winding roller to form a recycled coiled material. According to the film changing device, the observation window is covered with the transparent film, so that the observation window is prevented from being polluted by flock spraying waste, when the observation window needs to be used, the film changing device is started, the polluted film is rolled, and a new unpolluted film is released, so that a worker can observe the working condition of equipment in a flock spraying room through the observation window and the film.

Description

Technical Field

[0001] The utility model relates to the field of Christmas tree processing, in particular to a film changing device for preventing the pollution of an observation window. Background Art

[0002] In Europe and America, Christmas trees are widely used as decorations in Christmas celebration activities. Spraying fluff on the Christmas tree to make the Christmas tree have a snowflake effect can better enhance the festive atmosphere. Currently, most of the fluff spraying on Christmas trees is done manually. Due to the different heights and widths of Christmas trees, manual fluff spraying is to hold a fluff spraying gun and control the fluff spraying gun to spray fluff on the Christmas tree. After spraying one side, the Christmas tree is rotated by a certain angle, and then a new side is sprayed. The above process is repeated until the entire Christmas tree is sprayed. Such fluff spraying has low efficiency, poor fluff spraying uniformity and stability, resulting in uneven "snowflake" effects on the Christmas tree after spraying, affecting the sense of sight. At the same time, people working in such an environment for a long time will have certain adverse effects on their health.

[0003] For this reason, a prior art discloses an automated device for fluff spraying on Christmas trees. This device can, in a closed workshop, through controlling the up, down, left and right movement of the fluff spraying gun in cooperation with the rotating Christmas tree, perform automated flocking on the Christmas tree. At the same time, this device is arranged in a fluff spraying room, and the fluff spraying room is provided with an entrance and an exit for the Christmas tree to enter and exit the fluff spraying room. By setting up the fluff spraying room, the diffusion of dust is restricted, the pollution to the environment is reduced, and the situation that people working in the workshop for a long time affects their physical health is avoided. At the same time, an observation window for observing the working conditions of the equipment in the fluff spraying room is arranged in the fluff spraying room to prevent people from coming into contact with a large amount of dust pollutants generated by fluff spraying when observing the working conditions of the equipment. However, in the actual application process, a large amount of fluff spraying waste will be generated during the fluff spraying process by the fluff spraying equipment. These fluff spraying wastes will adhere to various walls of the fluff spraying room, including the observation window, resulting in the pollution of the observation window of the fluff spraying room, blocking the light of the observation window, reducing the observation effect of the observation window, and even causing workers to be unable to see the situation in the fluff spraying room from the observation window, and they can only observe the working conditions of the equipment from the entrance or exit of the fluff spraying room. On the one hand, there are multiple fluff spraying devices in the fluff spraying room, and the limited field of vision at the entrance or exit makes it difficult to observe the fluff spraying devices and Christmas trees in the middle, and it is impossible to accurately monitor and timely adjust the equipment, which may affect the fluff spraying effect of the Christmas tree. On the other hand, some fluff spraying wastes will spread from the entrance or exit of the fluff spraying room to the outside of the fluff spraying room, resulting in workers coming into contact with a large amount of fluff spraying wastes when observing, thus having certain adverse effects on their health. Summary of the Utility Model

[0004] Based on this, the utility model provides a film changing device for preventing the pollution of an observation window to overcome the deficiencies of the prior art.

[0005] The present invention relates to a film-changing device for preventing contamination of an observation window, comprising the following features: The film-changing device is disposed inside a spray booth. The film-changing device includes a film-out structure and a film-collecting structure. One of the film-out structure and the film-collecting structure is disposed above the observation window, and the other is disposed below the observation window. The film-out structure includes a loading shaft for fixing a reel with a film. An out-film unit for extruding the film is disposed between the loading shaft and the film-collecting structure. The film-collecting structure includes a film-collecting roller for winding the film. The out-film end of the film is fixedly connected to the film-collecting roller and wound into a recycled coil on the film-collecting roller.

[0006] Compared with the prior art, the film-changing device of the present utility model avoids the deposition of spraying waste in the spray booth on the observation window to cause contamination to the observation window by covering the film on the observation window, reduces the cleaning of the observation window, and extrudes a new uncontaminated film through the film-out structure to replace the contaminated old film, enabling the user to monitor the working conditions of the equipment, the spraying effect of the Christmas tree, etc. through the observation window and the new film, improving the product quality. In addition, while the film-out structure extrudes the film, the film-collecting structure winds the film, making the film-changing process more stable.

[0007] Further, the out-film unit includes a first driving roller, a driven roller, and a first motor. The first driving roller, the driven roller, and the loading shaft are parallel to each other. A first driving gear is fixedly provided at the end of the first driving roller, and a driven gear meshing with the first driving gear is fixedly provided at the end of the driven roller. The motor drives the first driving roller to rotate, so that the film is extruded between the first driving roller and the driven roller.

[0008] Further, the film-out structure includes a first housing, first covers covering both ends of the housing, and a first partition vertically disposed inside the first housing. The first partition divides the first housing into an out-film chamber and a first motor chamber. An out-film port is provided on one side of the out-film chamber close to the observation window, and the out-film port faces the film-collecting structure. The first driving gear, the driven gear, and the first motor are disposed in the first motor chamber. The driving roller and the driven roller are disposed in the out-film chamber and rotatably connected to the partition. The loading shaft is disposed in the out-film chamber and fixedly provided on the first partition. By disposing the loading shaft and the out-film unit inside the first housing, spraying waste is prevented from contaminating the out-film unit and the film in the film-out structure.

[0009] Further, the film-collecting structure includes a second housing, second covers covering both ends of the housing, and a second partition vertically disposed inside the second housing. The second partition divides the second housing into a film-collecting chamber and a second motor chamber. An opening opposite to the out-film port is provided in the film-collecting chamber. The film-collecting roller is disposed in the film-collecting chamber and rotatably connected to the second partition. By disposing the film-collecting roller inside the second housing, spraying waste is prevented from entering the film-collecting structure.

[0010] Furthermore, the film winding structure further includes a second driving roller, a second motor, and a third motor disposed in the film winding cavity. The second driving roller is rotatably connected to the second partition plate and is parallel to the film winding roller. The second motor is fixedly disposed in the second motor cavity and is used to drive the second driving roller to rotate. The third motor drives the film winding roller to rotate. The film winding roller is disposed on one side of the second driving roller away from the film discharging structure, and the projections of the film winding roller and the second driving roller on the horizontal plane at least partially overlap. With this setting, the film is kept straight and flat between the film winding structure and the film discharging structure, the volume of the recycled coil is reduced, the site is prevented from being messy, and subsequent processing is facilitated.

[0011] Furthermore, the third motor is pivotally connected to a swing arm, and the output shaft of the third motor is fixedly connected to the end of the film winding roller. One end of the swing arm away from the third motor is pivotally connected to the side wall of the second housing near the observation window, and the middle of the swing arm is pivotally connected to the side wall of the second housing near the observation window through a linear cylinder. The linear cylinder presses the recycled coil on the film winding roller against the second driving roller. The second driving roller functions to press the material, keeping the film flat on the winding roller, reducing the volume of the recycled coil, preventing the site from being messy, and facilitating subsequent processing.

[0012] Furthermore, the film winding structure further includes a third motor disposed in the second motor cavity. The film winding roller is rotatably connected to the second partition plate, and the third motor drives the film winding roller to rotate; a pressure roller with elastic potential energy is pressed on the recycled coil. The pressure roller is disposed in the film winding cavity, and the end of the pressure roller is rotatably connected to a telescopic structure. The telescopic structure is fixedly disposed on the side wall of the second housing near the observation window to provide elastic potential energy for the pressure roller. The second driving roller and the pressure roller serve as guide rollers to change the conveying direction of the film and keep the film in a taut state.

[0013] Furthermore, a disposable sleeve for winding the film is clamped on the film winding roller. The film discharging end of the film is fixedly connected to the disposable sleeve and wound into a recycled coil on the disposable sleeve. With this setting, the fluff waste on the film is prevented from polluting the film winding roller, facilitating the subsequent processing of the waste film.

[0014] Furthermore, the film changing device further includes a plurality of guiding parts disposed outside the first housing and / or the second housing. There is a gap for the film to pass between the guiding parts and the observation window, which is used to guide the film. With this setting, the distance between the film and the observation window is reduced, and even the film is attached to the observation window, ensuring that the film does not deform and enhancing the protection effect on the observation window.

[0015] Furthermore, the film changing device further includes a control system. The control system is disposed outside the spraying booth and is electrically connected to the film discharging structure and the film winding structure.

[0016] For better understanding and implementation, the present utility model will be described in detail below with reference to the accompanying drawings. Description of the Drawings

[0017] Figure 1 FIG. is a schematic structural diagram of a film changing device for preventing contamination of an observation window provided by an embodiment of the present application;

[0018] Figure 2 is Figure 1 a front view of the film changing device shown;

[0019] Figure 3 is Figure 1 a schematic structural diagram of the film discharging structure of the film changing device shown;

[0020] Figure 4 is Figure 1 a schematic structural diagram of the film winding structure of the film changing device shown;

[0021] Figure 5 is Figure 4 a schematic diagram of the working principle of the film winding structure shown;

[0022] Figure 6 a schematic structural diagram of a film changing device provided by another embodiment of the present application;

[0023] Figure 7 is Figure 6 a schematic structural diagram of the film winding structure of the film changing device shown;

[0024] Figure 8 a schematic external structure diagram of a spray booth;

[0025] In the figure: 10 - film discharging structure; 11 - first housing; 111 - first box body; 112 = first cover body; 113 - first partition; 114 - film discharging port; 12 - loading shaft; 13 - first driving roller; 14 - driven roller; 15 - first driving wheel; 16 - driven wheel; 17 - first motor; 20 - film winding structure; 21 - second housing; 211 - second box body; 212 - second cover body; 213 - second partition; 214 - opening; 215 - sliding groove; 216; 22 - second driving roller; 23 - film winding roller; 231 - swing arm; 232 - third motor; 233 linear cylinder; 234 - sleeve; 24 - second driving wheel; 25 - second motor; 26 - pressing roller; 27 - telescopic structure; 28 - guiding part; 30 - film; 40 - control system. Detailed Embodiment

[0026] Please refer to Figure 1, an embodiment of the present application provides a film changing device for preventing the contamination of an observation window. The film changing device is arranged in a spray booth and includes a film discharging structure 10, a film winding structure 20, and a film 30. One of the film discharging structure 10 and the film winding structure 20 is arranged above the observation window A, and the other is arranged below the observation window A. The film 30 is arranged inside the film discharging structure 10, and the film discharging end of the film 30 extends outward from the film discharging structure 10 to the inside of the film winding structure 20. The width of the film 30 is greater than the width of the observation window A, and is used to block the observation window A to prevent the spraying waste in the spray booth from contaminating the observation window A. Each time it is necessary to observe the working condition of the equipment in the spray booth, the film changing device is started. The film discharging structure 10 releases a new non-contaminated film 30a, and the film winding structure 20 recovers the contaminated old film 30b, enabling the user to observe the working condition of the equipment in the spray booth through the observation window A and the film 30.

[0027] Please refer to Figures 1-3, Further, in some embodiments, the film outlet structure 10 is disposed above the observation window A. The film outlet structure 10 includes a first housing 11. The first housing 11 includes a first box body 111, first cover bodies 112 covering the left and right ends of the first box body 111, and a first partition 113 vertically disposed in the first box body 111. The first partition 113 divides the first box body 111 into a film outlet cavity and a first motor cavity. The first motor cavity is an enclosed chamber formed by the first box body 111 and one of the first cover bodies 112. A film outlet 114 is formed on one side of the bottom of the film outlet cavity close to the observation window. Specifically, the film outlet structure 10 further includes a loading shaft 12, a first driving roller 13, a driven roller 14 located in the film outlet cavity, and a first driving wheel 15, a driven wheel 16 and a first motor 17 disposed in the first motor cavity. The first driving roller 13 and the driven roller 14 are disposed below the loading shaft 12, and the loading shaft 12, the first driving roller 13 and the driven roller 14 are parallel to each other. One end of the loading shaft 12 is fixedly connected to the first partition 113 for fixing a reel 31 with a film 30. The first driving roller 13 and the driven roller 14 are disposed close to the film outlet 114. One end of the first driving roller 14 is rotatably connected to the first partition 113 and passes through the first partition 113 to be fixedly connected to the first driving wheel 15 located in the first motor cavity. One end of the driven roller 14 is rotatably connected to the first partition 113 and passes through the first partition 113 to be fixedly connected to the driven wheel 16 located in the first motor cavity. The first driving wheel 15 and the first driven wheel 16 are meshed, and the first motor 17 drives the first driving wheel 15 to rotate, thereby driving the first driving roller 13 and the driven roller 14 to rotate. When using the film outlet structure 10, the reel 31 with the film 30 is sleeved on the loading shaft 12, and the film outlet end of the film 30 passes through the first driving roller 13 and the driven roller 14 and extends to the outside of the film outlet structure 10 from the film outlet 113. When the film outlet structure 10 operates, the first motor 17 drives the first driving roller 13 and the driven roller 14 to rotate, thereby extruding the film 30 between the first driving roller 13 and the driven roller 14 to realize film outlet.

[0028] Please refer to Figures 1-5 , Further, in some embodiments, the film winding structure 20 includes a second housing 21. The second housing 21 includes a second box body 211, second cover bodies 212 covering the left and right ends of the second box body 211, and a second partition 213 vertically disposed in the second box body 211. The second partition 213 divides the second box body 211 into a film winding cavity and a second motor cavity. An opening 214 for the film 30 to enter the film winding structure 20 is formed in the film winding cavity. Specifically, the film winding cavity includes side walls, as well as a top surface and a bottom surface connected to the side walls. The side walls are fixedly connected to the wall B of the spray booth, and one end of the top surface away from the side walls is bent downward to guide the film 30.

[0029] Further, the film collecting structure 20 further includes a second driving roller 22, a film collecting roller 23, a second driving wheel 24 and a second motor 25 located in the motor chamber. The second driving roller 22 guides the contaminated film 30b, so that the contaminated old film 30b is wound around the film collecting roller 23. The second driving roller 22 and the film collecting roller 23 are arranged in parallel and rotate in opposite directions. The second driving roller 22 is arranged below the top surface and at least partially protrudes from the top surface. One end of the second driving roller 22 is rotatably connected to the second partition plate 213, passes through the second partition plate 213 and is fixedly connected to the second driving wheel 24 located in the motor chamber. The second motor 25 drives the second driving wheel 24 to rotate, thereby driving the second driving roller 22 to rotate. The film collecting roller 23 is arranged outside the film collecting chamber and presses on the second driving roller 22. The second partition plate 213 is provided with a sliding groove 215 for the film collecting roller 23 to rotate. The film outlet end of the film 30 passes through the second driving roller 22 and the film collecting roller 23 and is fixedly connected to the film collecting roller 23. The non-contaminated side of the film 30 contacts the second driving roller 22, and the contaminated side contacts the old film 30b on the film collecting roller 23, thereby preventing the fluffing waste from contaminating the second driving roller 22 and other components.

[0030] Further, in some embodiments, one end of the film collecting roller 23 located in the motor chamber is equipped with a swing arm 231 and a third motor 232. The swing arm 231 and the third motor 232 are arranged in the motor chamber. One end of the swing arm 231 is pivotally connected to the side wall of the second box body 211, and one end is fixedly connected to the third motor 232. The output shaft of the third motor 232 is fixedly connected to the film collecting roller 23 to drive the film collecting roller 23 to rotate. The middle of the swing arm 231 is pivotally connected to a linear cylinder 233. The other end of the linear cylinder 233 is pivotally connected to the side wall of the second box body 211, and the linear cylinder 233 is located above the swing arm 231. The position of the film collecting roller 23 is adjusted by adjusting the angle between the linear cylinder 233 and the swing arm 231, so that the film collecting roller 23 always presses on the second driving roller 22. When the film collecting structure 20 operates, the second motor 25 drives the second driving roller 22 to rotate, and the third motor 232 drives the film collecting roller 23 to rotate, so that the contaminated old film 30b is wound around the film collecting roller 23 to form a waste film roll 32, realizing the recycling of the old film 30b. Preferably, the end of the film collecting roller 23 away from the third motor 232 is rotatably connected to the second cover body 212.

[0031] Refer to Figures 6-7, Further, in some embodiments, the film winding structure 20 further includes a pressure roller 26 located in the film winding cavity. The second driving roller 22 and the pressure roller 26 guide the contaminated film 30, so that the contaminated film 30 is wound at the film winding roller 23. The pressure roller 26 and the film winding roller 23 are arranged below the second driving roller 22 and the three are parallel to each other. The rotation directions of the second driving roller 22 and the pressure roller 26 are the same, and the rotation directions of the second driving roller 22 and the film winding roller 23 are opposite. The film winding roller 23 is rotatably connected to the second partition plate 213 and passes through the second partition plate 213 to be connected to a third motor 232 located in the motor cavity. The third motor 232 is fixedly arranged in the motor cavity and drives the film winding roller 23 to rotate. One end of the pressure roller 26 is fixedly connected to a telescopic structure 27, and the other end of the telescopic structure 27 is fixedly connected to the side wall of the second box body 211. The telescopic structure 27 provides an elastic pressure for the pressure roller 26, so that the pressure roller 26 presses on the film winding roller 23 or the waste film roll 32. As the thickness of the waste film roll 32 on the film winding roller 23 increases, the film winding roller 23 squeezes the pressure roller 26 to make the telescopic structure 27 contract, so that the pressure roller 26 always keeps in contact with the film 30 wound on the film winding roller 23.

[0032] Further, a sleeve 234 for winding is clamped on the film winding roller 23. The sleeve 234 can be a disposable sleeve, and the film outlet end of the film 30 is fixedly connected to the disposable sleeve. During installation, the film outlet end of the film 30 passes through the second driving roller 22 and the pressure roller 23 in sequence and is fixedly connected to the disposable sleeve on the film winding roller 23. When the film winding structure 20 operates, the second driving roller 22 and the film winding roller 23 rotate, so that the contaminated film 30 is wound on the disposable sleeve. After the film 30 is used up, the disposable sleeve can be directly replaced, which is convenient for dealing with the contaminated film 30 and avoids polluting the film receiving structure 20 at the same time. Preferably, a clamping portion corresponding to the disposable sleeve is provided on the second cover body 212 of the film winding cavity, and the disposable sleeve is rotatably connected to the clamping portion.

[0033] In some embodiments, each end of the pressure roller 26 is fixedly connected to a telescopic structure 27, and the telescopic structure 27 is arranged in the film winding cavity. In other embodiments, the second partition plate 213 is provided with a through hole for the pressure roller 26 to stretch, and the pressure roller 26 passes through the through hole and is fixedly connected to the telescopic structure 27 fixedly arranged in the motor cavity.

[0034] In some embodiments, the telescopic structure 27 is a linear cylinder.

[0035] In some embodiments, the film receiving cavity further includes an outer wall 216 that wraps the film receiving roller 23, preventing excessive fluffing waste from adhering to the wound film 30 and increasing the thickness of the film 30. At the same time, it reduces the entry of fluffing waste into the film receiving structure 20 and prevents the fluffing waste from contaminating the second driving roller 22 and the pressing roller 23. Further, the top end of the outer wall 216 is bent towards the film 30, and the projection of the outer wall 216 on the horizontal plane at least partially overlaps with the top surface, further reducing the entry of fluffing waste into the film receiving structure 20. An opening 214 for the film to enter the film receiving structure 20 is formed between the top end of the outer wall 216 and the top surface.

[0036] Preferably, the speed at which the film discharging structure 10 extrudes the film 30 is the same as the speed at which the film receiving structure 20 winds up the film 30, avoiding pulling and damaging the film 30 and making the film changing process more stable.

[0037] In some embodiments, a plurality of guiding parts 28 are arranged at intervals on the top surface of the film receiving cavity and / or the bottom of the discharging cavity. The guiding parts 28 are close to the observation window and have a gap with the observation window. The discharging end of the film 30 passes through the gap between the guiding parts 28 and the observation window and enters the film receiving structure 20 along the top surface of the film receiving cavity. By arranging the guiding parts 28, the distance between the film 30 and the observation window is restricted, preventing the film 30 from deforming and the fluffing waste from contaminating the observation window from the deformed part.

[0038] Preferably, the film changing device further includes a control system 40 which is arranged outside the spraying booth and electrically connected to the film discharging structure 10 and the film receiving structure 20. The control system 40 can adjust the opening and closing of the film discharging structure 10 and the film receiving structure 20.

[0039] Further, the spraying booth is provided with a plurality of observation windows, and each observation window is provided with one of the above-mentioned film changing devices. Each film changing device is electrically connected to the control system 40, so that a plurality of film changing devices can be controlled to operate simultaneously through one control system 40. In other embodiments, only one film changing device is arranged in the spraying booth, and the width of the film 30 of the film changing device is greater than the distance between the two ends of the plurality of observation windows, thereby preventing the fluffing waste from contaminating the observation windows.

[0040] Before use, set the film discharging structure 10 above the observation window in the spraying booth, and set the film winding structure 20 below the observation window in the spraying booth. Open the first cover body 112 and the second cover body 212, install the new roll 31 with the film 30 on the loading shaft 12, and pass the discharging end of the film 30 through between the first driving roller 13 and the driven roller 14, the film discharging port 114, the opening 214, between the film winding roller 23 and the second driving roller 22 or the pressure roller 26 in sequence, and fix it on the disposable sleeve of the film winding roller 23. Then cover the first cover body 112 and the second cover body 212. During the flocking process, the flocking waste of the rotating flocking of the Christmas tree is blocked by the film 30 between the film discharging structure 10 and the film winding structure 20, thereby preventing the observation window from being contaminated. When it is necessary to observe the working conditions of each device in the spraying booth, control the film discharging structure 10 and the film winding structure 20 to work through the control system 40 outside the spraying booth. The film winding structure 20 winds the contaminated old film 30b on the disposable sleeve. At the same time, the film discharging structure 10 extrudes the uncontaminated new film 30a out of the film discharging structure 10. At this time, the user can observe the working conditions of each device in the spraying booth through the observation window and the uncontaminated new film 30a. When the film 30 is used up, the wound contaminated old film 30b can be taken out, and a new film 30 can be reinstalled, which is convenient to operate and can observe the working conditions of each device in the spraying booth more safely.

[0041] Compared with the prior art, the beneficial effects of the technical solution of the present utility model are as follows:

[0042] (1) The film of the film changing device blocks the flocking waste in the spraying booth from depositing on the observation window and causing pollution to the observation window, thereby reducing the cleaning of the observation window, facilitating the user to monitor the working conditions of the equipment, the flocking effect of the Christmas tree, etc. through the observation window, and improving the product quality.

[0043] (2) The uncontaminated new film is extruded through the film discharging structure to replace the contaminated old film, enabling the user to observe the working conditions of each device in the spraying booth through the observation window and the new film, and avoiding the user's long-term contact with the flocking waste at the entrance or exit of the spraying booth, which affects physical health.

[0044] (3) The contaminated old film is wound by the film winding structure, which is convenient for the user to dispose of the contaminated old film subsequently.

[0045] (4) The film winding structure and the film discharging structure fix the film at both ends, preventing the film from deforming and affecting the protection of the observation window by the film. In addition, while the film discharging structure extrudes the film, the film winding structure winds the film, making the film changing process more stable.

[0046] (5) Guide parts for guiding the film are provided on the film winding structure and the film discharging structure to control the distance between the film and the observation window, prevent the film from deforming, and enhance the protection of the observation window.

[0047] The above-described embodiments merely represent several implementation manners of the present utility model. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the utility model patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and the present utility model also intends to cover these modifications and variations.

Claims

1. A film changing device for preventing pollution of an observation window, the film changing device being arranged in a spray booth, characterized in that: The film changing device includes a film discharging structure and a film collecting structure, one of which is arranged above the observation window, and the other is arranged below the observation window; the film discharging structure includes a loading shaft, which is used to fix the reel with film, and a film discharging unit for extruding the film is provided between the loading shaft and the film collecting structure; the film collecting structure includes a film collecting roller for winding the film, and the film discharging end of the film is fixedly connected to the film collecting roller and is wound into a recycling coil on the film collecting roller.

2. The membrane replacement device according to claim 1, characterized in that: The film discharging unit includes a first active roller, a driven roller and a first motor. The first active roller, the driven roller and the feeding shaft are parallel to each other. A first active gear is fixedly arranged at the end of the first active roller. A driven gear meshing with the first active gear is fixedly arranged at the end of the driven roller. The motor drives the first active roller to rotate so that the film is extruded from between the first active roller and the driven roller.

3. The membrane replacement device according to claim 2, characterized in that: The film discharging structure includes a first shell, a first cover body covered at both ends of the shell, and a first partition vertically arranged in the first shell, the first partition divides the first shell into a film discharging cavity and a first motor cavity, the film discharging cavity is provided with a film discharging port on the side close to the observation window, and the film discharging port is opposite to the film collecting structure, the first driving gear, the driven gear and the first motor are arranged in the first motor cavity, the driving roller and the driven roller are arranged in the film discharging cavity and are rotatably connected to the partition, and the feeding shaft is arranged in the film discharging cavity and fixedly arranged on the first partition.

4. The membrane replacement device according to claim 3, characterized in that: The film collecting structure includes a second shell, a second cover body covered at both ends of the shell, and a second partition vertically arranged in the second shell, the second partition divides the second shell into a film collecting cavity and a second motor cavity, the film collecting cavity is provided with an opening opposite to the film outlet, and the film collecting roller is arranged in the film collecting cavity and is rotatably connected to the second partition.

5. The membrane replacement device according to claim 4, characterized in that: The film collecting structure also includes a second active roller, a second motor and a third motor arranged in the film collecting cavity. The second active roller is rotatably connected to the second partition plate and is parallel to the film collecting roller. The second motor is fixed in the second motor cavity and is used to drive the second active roller to rotate. The third motor drives the film collecting roller to rotate. The film collecting roller is arranged on a side of the second active roller away from the film discharging structure, and the projections of the film collecting roller and the second active roller on the horizontal plane at least partially overlap.

6. The membrane replacement device according to claim 5, characterized in that: The third motor is pivotally connected to a swing arm, and the output shaft of the third motor is fixedly connected to the end of the film-collecting roller. The end of the swing arm away from the third motor is pivotally connected to the side wall of the second shell near the observation window. The middle part of the swing arm is pivotally connected to the side wall of the second shell near the observation window through a linear cylinder. The linear cylinder presses the recovered coil on the film-collecting roller onto the second active roller.

7. The membrane replacement device according to claim 5, characterized in that: The film collecting structure also includes a third motor arranged in the second motor cavity, the film collecting roller is rotatably connected to the second partition, and the third motor drives the film collecting roller to rotate; a pressing roller with elastic potential energy is pressed on the recovered coil, and the pressing roller is arranged in the film collecting cavity, and an end of the pressing roller is rotatably connected to a telescopic structure, and the telescopic structure is fixed to the side wall of the second shell near the observation window to provide elastic potential energy for the pressing roller.

8. The membrane replacement device according to claim 5, characterized in that: A disposable sleeve for winding up the film is clamped on the film-winding roller, and the film outlet end of the film is fixedly connected to the disposable sleeve and is wound on the disposable sleeve to form a recycling coil.

9. The membrane replacement device according to claim 4, characterized in that: It also includes a plurality of guide parts arranged on the outside of the first shell and / or the second shell, and there is a gap between the guide part and the observation window for the film to pass through, which is used to guide the film.

10. The membrane replacement device according to any one of claims 1 to 9, characterized in that: It also includes a control system, which is arranged outside the spray room and is electrically connected to the film discharging structure and the film collecting structure.

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