A kind of antimony-based antireflection agent preparation processing mixing device

Abstract

The present application relates to the technical field of mixing equipment, and particularly relates to a kind of antimony-based antireflection agent preparation processing mixing device.It includes moving frame, the moving frame is slidably connected with sliding frame, the sliding frame is rotatably connected with rotary drum, the lower side of the rotary drum is provided with stirring vane, the rotary drum is provided with the protective film that the stirring vane is wrapped.The present application is wrapped by protective film before starting stirring operation, realizes the physical isolation of stirring vane and material, effectively prevents material from adhering to the surface of stirring vane in the stirring process, after stirring is completed, the protective film with residual material is taken out, the material remaining on the protective film is scraped off back to stirring tank by the action of " rolling", realizes the effective recovery of residual material, reduces waste, avoids the secondary pollution caused by the residual material of stirring vane being thrown out in traditional cleaning from the source, simultaneously reduces the risk of cross contamination, improves the equipment cleanliness and operation safety.

Description

Technical Field

[0001] This invention relates to the field of mixing equipment technology, and in particular to a mixing apparatus for preparing and processing antimony-based brighteners. Background Technology

[0002] The growing global demand for renewable energy has driven the development of solar photovoltaic power generation. As a key component, the transmittance of photovoltaic glass directly affects power generation efficiency. Currently, commonly used fluoride and oxide antireflective agents have problems such as poor stability, poor corrosion resistance, and high cost. Antimony-based antireflective agents, as a new type of material, have advantages such as good stability, strong corrosion resistance, and low cost, showing great potential to improve the transmittance of photovoltaic glass and are considered an ideal choice for improving the efficiency of solar cells in the future.

[0003] In the preparation and processing of antimony-based brighteners, stirring is a key process step to ensure uniform dispersion and sufficient reaction of the components. Currently, widely used stirring equipment mainly consists of stirring blades and stirring tanks. The rotation of the stirring blades drives the material flow to achieve mixing and homogenization.

[0004] However, after the mixing blades finish mixing, a certain amount of material often remains on their surface, especially when processing materials with a certain degree of stickiness or adhesion. Existing cleaning methods usually rely on the rotation of the mixing blades themselves for initial cleaning, but this method is prone to throwing out residual material that has not been completely removed due to centrifugal force. This causes the material to splash onto other parts or cavity walls inside the equipment, which not only causes secondary pollution but also increases the complexity and workload of subsequent cleaning. At the same time, the material that is thrown out is often difficult to effectively recover, affecting production efficiency and bringing cross-contamination or product quality risks. Summary of the Invention

[0005] To address the problems mentioned in the background section, the present invention provides an apparatus for preparing, processing, and mixing antimony-based brighteners.

[0006] The technical solution of the present invention is as follows: a mixing device for preparing and processing antimony-based brighteners, comprising a movable frame, a sliding frame slidably connected to the movable frame, a rotating drum rotatably connected to the sliding frame, a drive motor for driving the rotating drum to rotate on the sliding frame, a stirring blade on the lower side of the rotating drum, and a protective film covering the stirring blade on the rotating drum.

[0007] Furthermore, a shrinkable portion is fixed to the upper side of the protective film, and the shrinkable portion is provided with a first pull cord.

[0008] Furthermore, an elastic ring is fixedly connected to the inner side of the contraction section, and the elastic ring is used to improve the sealing strength between the contraction section and the rotating cylinder.

[0009] Furthermore, a sliding column is slidably connected inside the rotating cylinder. The sliding column is used to fix the lower side of the protective film. The sliding column is provided with a plurality of first through holes. The diameter of the lower side of the protective film is smaller than the inner diameter of the rotating cylinder. A plurality of second through holes are provided on the lower side of the rotating cylinder. The plurality of second through holes communicate with the plurality of first through holes through the rotating cylinder.

[0010] Furthermore, a guide plate is fixedly connected to the lower side of the rotating drum, and the guide plate is located below several of the second through holes.

[0011] Furthermore, the rotating drum is fixedly connected to a connecting frame located between the sliding frame and the protective film. The connecting frame is fixedly connected to two multi-stage telescopic shells that are centrally symmetrically distributed. The telescopic ends of the multi-stage telescopic shells are fixedly connected to a connecting frame. The connecting frame is fixedly connected to a protective shell. The protective shell is rotatably connected to a rotating component. A torsion spring is fixedly connected between the rotating component and the adjacent protective shell. The two ends of the first pull rope pass through the two protective shells respectively and are fixedly connected to the rotating component. The rotating component is fixedly connected to a second pull rope that is fixedly connected to the connecting frame.

[0012] Furthermore, both connecting frames are jointly fixed with a connecting ring.

[0013] Furthermore, a corrugated pipe is fixedly connected to the connecting frame inside the multi-stage telescopic shell, and a connecting pipe is fixedly connected to the corrugated pipe, which passes through the rotating cylinder and communicates with it. The sum of the flow areas of all the first through holes is less than the sum of the flow areas of all the connecting pipes.

[0014] Furthermore, the sliding frame is fixedly connected to an electric push rod, and the sliding column is fixedly connected to a T-shaped frame located inside the rotating cylinder. The upper side of the T-shaped frame is rotatably connected to the telescopic end of the electric push rod. A fixed cylinder is fixedly connected inside the rotating cylinder, and the connecting pipe passes through the fixed cylinder. Two guide grooves are provided in the fixed cylinder, which are symmetrically distributed in the center. Both of the symmetrically distributed guide grooves are used to guide the movement of the T-shaped frame.

[0015] Furthermore, the guide groove is composed of a straight groove and a spiral groove connected together, with the straight groove located below the spiral groove. The T-shaped frame moves along the straight groove and spiral groove within the guide groove, and the lower side of the rotating drum is used to squeeze the inner side of the protective film.

[0016] Compared with the prior art, the present invention has the following advantages: Before the mixing operation begins, the present invention wraps the mixing blade with a protective film to achieve physical isolation between the mixing blade and the material, effectively preventing the material from adhering to the surface of the mixing blade during the mixing process. After the mixing is completed, the protective film with residual material is removed, and the material remaining on the protective film is scraped back into the mixing tank by a "scraping" action, achieving effective recycling of residual material, reducing waste, avoiding secondary pollution caused by the splashing of residual material from the mixing blade in traditional cleaning, reducing the risk of cross-contamination, and improving the cleanliness and operational safety of the equipment. When handling residual materials, the protective film expands and actively detaches from the stirring blades. At the same time, the lower side of the protective film flips into the rotating drum, turning the outer side into the inner side. The residual materials are then dislodged through the contact between the lower side of the rotating drum and the protective film, improving material utilization and reducing waste. Meanwhile, the protective film is guided by the guide groove to the T-shaped frame, causing it to twist. This mechanical twisting simulates the action of wringing a cloth, further reducing material waste. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2 This is a three-dimensional structural schematic diagram from another perspective of the present invention; Figure 3 This is a bottom view of the three-dimensional structure of the present invention; Figure 4 This is a schematic diagram of the three-dimensional structure of the protective film of the present invention after expansion; Figure 5 This is a three-dimensional cross-sectional view of the protective film of the present invention; Figure 6 This is a three-dimensional structural cross-sectional view of the rotating cylinder of the present invention; Figure 7 This is a three-dimensional structural diagram of the protective film and T-shaped frame of the present invention; Figure 8 For the present invention Figure 7 Enlarged view of point A in the middle; Figure 9 This is a three-dimensional structural cross-sectional view of the connecting frame of the present invention; Figure 10 This is an exploded three-dimensional view of the connecting frame and protective shell of the present invention; Figure 11 This is an exploded three-dimensional view of the protective shell and rotating component of the present invention; Figure 12 This is a three-dimensional structural cross-sectional view of the fixing cylinder of the present invention; Figure 13 This is a three-dimensional structural diagram of the guide groove of the present invention.

[0018] The markings in the attached diagram are as follows: 1: Moving frame, 2: Sliding frame, 3: Rotating drum, 4: Drive motor, 5: Stirring blade, 6: Protective film, 7: Contraction section, 8: First pull rope, 801: Elastic ring, 9: Sliding column, 10: First through hole, 11: Second through hole, 12: Guide plate, 13: Connecting frame, 14: Multi-stage telescopic shell, 15: Connecting frame, 16: Protective shell, 17: Rotating component, 18: Second pull rope, 19: Corrugated pipe, 20: Connecting pipe, 21: Electric push rod, 22: T-shaped frame, 23: Fixed cylinder, 24: Guide groove. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] The mobile frame 1 is equipped with a control terminal, and all electrical components in this invention are electrically connected to the control terminal.

[0021] To address the problem that existing mixing equipment often leaves material residue on the mixing blades after processing viscous materials, and that relying solely on the self-rotation of the mixing blades for cleaning easily leads to material splashing due to centrifugal force, causing secondary pollution, increasing cleaning difficulty, and making material recovery difficult, thus affecting production efficiency and posing a risk of cross-contamination, this invention solves the above problems through the following explanation: Example 1: A mixing apparatus for preparing and processing antimony-based brighteners, please refer to... Figures 1-5 The system includes a movable frame 1, a movable frame 2 slidably connected to the movable frame 1, a gearbox and a motor on the lower side of the movable frame 1, a threaded rod rotatably connected to the movable frame 1 and threadedly connected to the sliding frame 2, the power output end of the motor being connected to the threaded rod through the gearbox, a rotating drum 3 rotatably connected to the sliding frame 2, a drive motor 4 for rotating the rotating drum 3, a stirring blade 5 on the lower side of the rotating drum 3, and a protective film 6 covering the stirring blade 5. The protective film 6 covers the stirring blade 5, achieving physical isolation between the stirring blade 5 and the material, preventing contact between the material and the stirring blade 5. After mixing, the protective film 6 with residual material is removed, and the material remaining on the protective film 6 is scraped back into the mixing tank by a "scraping" action, thus achieving the recovery of residual material while ensuring that the residual material does not splash around.

[0022] Working principle: Before mixing the antimony-based brightener (for ease of reading later, the antimony-based brightener will be referred to as material), the staff first extracts the gas from the protective film 6, so that the protective film 6 is attached to the lower side of the rotating drum 3 and wraps the stirring blade 5. Then, the protective film 6 is fixed to the rotating drum 3 by the existing fixing device, thus completing the preparatory actions before mixing.

[0023] After completing the preparatory steps before mixing, the staff places the material container under the sliding frame 2, aligning the central axis of the material container with the central axis of the rotating drum 3. Then, the staff operates the sliding frame 2 to move its components downwards, immersing the protective film 6, the rotating drum 3, and the stirring blades 5 into the material. Once these components have moved to the required working height, the sliding frame 2 stops moving. The staff then starts the drive motor 4 via the control terminal. The drive shaft of the drive motor 4 drives the rotating drum 3 to rotate via a pulley belt. During the rotation of the rotating drum 3, the stirring blades 5 and the protective film 6 rotate synchronously, thereby mixing the material.

[0024] After the material is stirred for a period of time (determined by the operator), the operator turns off the drive motor 4 via the control terminal. Then, the operator manipulates the sliding frame 2 to move its components upwards, removing the protective film 6, the rotating drum 3, and the stirring blades 5 from the material. The operator then removes the fixing device, thus releasing the protective film 6 from the rotating drum 3. The operator then removes the protective film 6 and cleans up any remaining material adhering to it. The above actions achieve the following effect: This invention uses a protective film 6 to wrap the stirring blade 5, thus breaking the direct contact between the stirring blade 5 and the material before the stirring operation begins. This avoids the problem of material adhering to the surface of the stirring blade 5 during the stirring process. After the stirring is completed, the stirring blade 5 can be removed, and the residual material adhering to the protective film 6 can be scraped off into the mixing tank by stroking. This reduces material waste and eliminates the risk of secondary pollution and cross-contamination at the source.

[0025] Example 2: Based on Example 1, please refer to... Figure 5 and Figure 6 A shrinkable portion 7 is fixedly attached to the upper side of the protective film 6. The shrinkable portion 7 is provided with a first pull cord 8, which can be a spring steel wire (for illustrative purposes only). Both the protective film 6 and the shrinkable portion 7 can be TPU film. The shape of the first pull cord 8 in the attached figure is only an example. In reality, it can also be a drawstring structure that simulates the drawstring structure in a drawstring garbage bag. When the first pull cord 8 is stretched, the shrinkable portion 7 shrinks and provides a precondition for sealing the upper side of the protective film 6. An elastic ring 801 is fixedly attached to the inner side of the shrinkable portion 7. The elastic ring 801 is used to improve the sealing strength between the shrinkable portion 7 and the rotating drum 3. The elastic ring 801 is made of silicone and is used to enhance the sealing effect on the upper side of the protective film 6 after the shrinkable portion 7 shrinks.

[0026] Please refer to Figures 6-8 The rotating drum 3 is sealed and slidably connected with a sliding column 9, which is used to fix the lower side of the protective membrane 6. The sliding column 9 is provided with several first through holes 10. The diameter of the lower side of the protective membrane 6 is smaller than the inner diameter of the rotating drum 3. The lower side of the rotating drum 3 is provided with several second through holes 11, which are connected to the first through holes 10 through the rotating drum 3. A fixing cap is detachably connected to the lower side of the sliding column 9 to fix the lower side of the protective membrane 6 to the lower side of the sliding column 9. A guide plate 12 is fixedly connected to the lower side of the rotating drum 3. The guide plate 12 is an inclined ring and is located below the several second through holes 11. The guide plate 12 supports the lower side of the protective membrane 6 to prevent the gas inside the protective membrane 6 from being unable to escape after the protective membrane 6 blocks all the second through holes 11 during the process of extracting gas from the protective membrane 6.

[0027] Please refer to Figure 5 and Figures 7-11 The rotating drum 3 is fixedly connected to a connecting frame 13 located between the sliding frame 2 and the protective film 6. The connecting frame 13 is fixedly connected to two centrally symmetrically distributed multi-stage telescopic shells 14. The telescopic ends of the multi-stage telescopic shells 14 are fixedly connected to a connecting frame 15. The connecting frame 15 is fixedly connected to a protective shell 16. A rotating component 17 is rotatably connected to the protective shell 16. A torsion spring is fixedly connected between the rotating component 17 and the adjacent protective shell 16. The two ends of the first pull rope 8 pass through the two protective shells 16 respectively and are fixedly connected to the rotating component 17. The rotating component 17 is fixedly connected to a second pull rope 18 fixedly connected to the connecting frame 13. The protective shell 16 consists of two... The two semi-circular shells are hinged together, and the other side of the two shells is connected by bolts. In the attached figure, the torsion spring adjacent to the rotating part 17 still has a slack. The second pull rope 18 still has a slack on the rotating part 17, and the first pull rope 8 still has a slack on the rotating part 17. When the protective shell 16 moves downward, the second pull rope 18 pulls the rotating part 17, causing the rotating part 17 to rotate and release the first pull rope 8, causing the contraction part 7 to expand. The two connecting frames 15 are fixed together with a connecting ring, which is used to connect the two connecting frames 15 so that the relevant parts on the two connecting frames 15 can be displaced synchronously.

[0028] Please refer to Figure 9 The multi-stage telescopic shell 14 is fixedly connected to a bellows 19 which is fixedly connected to a connecting frame 13. The bellows 19 is fixedly connected to a connecting pipe 20 that passes through the rotating cylinder 3 and communicates with it. The sum of the flow areas of all the first through holes 10 is less than the sum of the flow areas of all the connecting pipes 20. The bellows 19 shown in the attached figure is not in the limit state of contraction. The expansion and contraction of the multi-stage telescopic shell 14 is controlled by the expansion and contraction of the bellows 19.

[0029] Please refer to Figures 4-9 , Figure 12 and Figure 13The sliding frame 2 is fixedly connected to an electric push rod 21, and the sliding column 9 is fixedly connected to a T-shaped frame 22 located inside the rotating cylinder 3. The upper side of the T-shaped frame 22 is rotatably connected to the telescopic end of the electric push rod 21. A fixed cylinder 23 is fixedly connected inside the rotating cylinder 3, and a connecting pipe 20 passes through the fixed cylinder 23. Two guide grooves 24 are centrally symmetrically distributed inside the fixed cylinder 23. Both centrally symmetrically distributed guide grooves 24 are used to guide the movement of the T-shaped frame 22. The guide grooves 24 are connected to the T-shaped frame 22. The T-shaped frame 22 is composed of a straight groove and a spiral groove, with the straight groove located below the spiral groove. The T-shaped frame 22 moves along the straight groove and spiral groove in the guide groove 24. The lower side of the rotating drum 3 is used to squeeze the inner side of the protective film 6. When the T-shaped frame 22 is not moving, the guide groove 24 limits the T-shaped frame 22, so that the sliding column 9 rotates synchronously with the rotating drum 3. When the upper side of the T-shaped frame 22 slides along the straight groove in the guide groove 24, it is in a vertical sliding state. When the upper side of the T-shaped frame 22 slides along the spiral groove in the guide groove 24, the T-shaped frame 22 rotates and slides vertically at the same time.

[0030] Working principle: Before the material is fed into the mixing chamber, the operator first connects the external air pump to the upper side of the fixed cylinder 23 and the rotating cylinder 3, so that the external air pump can inject gas into the fixed cylinder 23 and the rotating cylinder 3 and extract gas from them, so as to complete the preparation action before mixing the material.

[0031] To ensure the reader can clearly understand the shape and state of the protective film 6 and the shrinkage portion 7 of the present invention, the shapes of the protective film 6 and the shrinkage portion 7, as well as the positions of the various components shown in the accompanying drawings, are not in their extreme states. Please refer to the accompanying drawings. Figure 9 The torsion spring between the rotating component 17 and the adjacent protective shell 16 has torque, and the second pull rope 18 and the first pull rope 8 are not fully wound up. In fact, the state of the connecting frame 13, the protective film 6, and related parts is as described below: the initial position of the connecting frame 15 and its associated parts is higher than that of the attached parts. Figure 9 The location.

[0032] The steps in Example 1 can be repeated for mixing the materials. When the mixing of materials is completed and it is necessary to treat the residual material on the protective film 6, this example uses an automatic processing method instead of the manual processing in Example 1. The cleaning process is as follows: An external air pump injects gas into the fixed cylinder 23 and the rotating cylinder 3. The gas enters the rotating cylinder 3 from the upper side of the connecting pipe 20. As the gas flows through the fixed cylinder 23, some of the gas enters the two connecting pipes 20, and the remaining gas continues to move downward until it passes through all the first through holes 10. The remaining gas then enters the lower side of the rotating cylinder 3 and enters the protective membrane 6 through all the second through holes 11 and the lower side of the rotating cylinder 3, causing the protective membrane 6 to expand and no longer wrap around the stirring blade 5. The gas that enters the two connecting pipes 20 then enters the corresponding bellows 19, causing the bellows 19 to expand and drive the telescopic part of the corresponding multi-stage telescopic shell 14 to extend downward. The telescopic part of the multi-stage telescopic shell 14 drives the connecting frame 15 on the other side to move synchronously through the connecting frame 15 and the connecting ring. As the two connecting frames 15 move downward, they drive the corresponding protective shells 16 to move synchronously. At that time, the rotating part 17 moves with the protective shell 16 and pulls the second pull rope 18, causing the rotating part 17 to rotate and release the first pull rope. As the rotating part 17 rotates, the adjacent torsion springs gradually tighten. The middle part of the first pull rope 8, due to its own toughness, no longer squeezes the contraction part 7 and drives it to expand. At the same time, the control terminal controls the extension part of the electric push rod 21 to retract upward. The extension part of the electric push rod 21 drives the T-shaped frame 22 and the sliding column 9 to move upward in the rotating drum 3 (during the movement of the T-shaped frame 22, its upper side moves along the two guide grooves 24). During the movement of the rotating drum 3, the lower side of the protective film 6 moves synchronously. Through the above process, the following effects are achieved: the protective film 6 first expands with air and no longer wraps the stirring blade 5. Then, the upper side of the protective film 6 moves downward. At the same time, the sliding column 9 drives the lower side of the protective film 6 to move into the rotating drum 3, flipping the protective film 6 so that the outer side of the protective film 6 enters the rotating drum 3 and becomes the inner side. During this process, the lower side of the rotating drum 3 contacts the inner side of the protective film 6, smoothing the protective film 6 and causing the residual material on the protective film 6 to fall downward, reducing material waste.

[0033] When the T-shaped frame 22 moves along the straight groove in the guide groove 24 to the spiral groove, the T-shaped frame 22 drives the sliding column 9 to rotate, and the sliding column 9 drives the inner side of the protective film 6 to twist, thereby achieving the effect of twisting the protective film 6, simulating wringing a rag to make the residual material on the protective film 6 fall off, further reducing material waste (finally, after the whole process is completed, the staff can remove the protective film 6 and clean it).

[0034] After cleaning the protective film 6, the staff uses the control terminal to operate the telescopic part of the electric push rod 21 to extend downward, so that the telescopic end T-shaped frame 22 and sliding column 9 of the electric push rod 21 move downward in the rotating drum 3. During this process, the T-shaped frame 22 moves from the spiral groove in the guide groove 24 to the straight groove, so that the T-shaped frame 22 drives the sliding column 9 to rotate and reset. The sliding column 9 then drives the inner side of the protective film 6 to reset and twist, thereby restoring the protective film 6 to its untwisted state.

[0035] When the sliding column 9 moves to Figure 6 After reaching the specified state, an external air pump extracts gas from the fixed cylinder 23 and the rotating cylinder 3, causing a gas shortage and negative pressure in both. Under this state, the gas in the two bellows 19 enters the fixed cylinder 23 through the connecting pipe 20 and is extracted. When the gas in the bellows 19 is discharged, it contracts and drives the telescopic part of the multi-stage telescopic shell 14 to retract. During the retraction of the telescopic part of the multi-stage telescopic shell 14, the rotating component 17 is rotated back to its original position by the adjacent torsion spring. During the rotation of the rotating component 17, the second pull rope 18 and the first pull rope 8 are wound around the rotating component 17. The second pull rope 18 and the first pull rope 8 are wound up. During the winding process of the first pull rope 8, the contraction part 7 is squeezed and contracted. During the contraction process of the contraction part 7... The elastic ring 801 is deformed. When the first pull rope 8 is wound to its limit and the contraction part 7 is contracted to its limit, the inner side of the elastic ring 801 is in contact with the rotating drum 3. At this time, the upper side of the protective film 6 is sealed. At this time, the gas in the fixed cylinder 23 and the rotating drum 3 can be extracted by the external air pump. The residual gas in the protective film 6 enters the lower side of the rotating drum 3 through its inner lower side and all the second through holes 11, and then moves upward through all the first through holes 10 until it is extracted by the external air pump. During the process of the residual gas in the protective film 6 being extracted, it gradually adheres to the lower side of the rotating drum 3 and the outer side of the stirring blade 5. When the protective film 6 wraps the stirring blade 5, the external air pump stops extracting air and keeps the upper side of the fixed cylinder 23 and the rotating drum 3 sealed with the external air pump.

[0036] Although the invention has been described with reference to exemplary embodiments, it should be understood that the invention is not limited to the disclosed exemplary embodiments.

Claims

1. A mixing apparatus for preparing and processing antimony-based brighteners, characterized in that, It includes a movable frame (1), a sliding frame (2) slidably connected to the movable frame (1), a rotating drum (3) rotatably connected to the sliding frame (2), a drive motor (4) for driving the rotating drum (3) to rotate on the sliding frame (2), a stirring blade (5) is provided on the lower side of the rotating drum (3), and a protective film (6) is provided on the rotating drum (3) to wrap the stirring blade (5). The upper side of the protective film (6) is fixed with a shrinkable part (7), and the shrinkable part (7) is provided with a first pull rope (8). An elastic ring (801) is fixedly connected to the inner side of the contraction part (7). The elastic ring (801) is used to enhance the sealing strength between the contraction part (7) and the rotating cylinder (3). The rotating cylinder (3) is sealed and slidably connected with a sliding column (9). The sliding column (9) is used to fix the lower side of the protective film (6). The sliding column (9) is provided with a plurality of first through holes (10). The diameter of the lower side of the protective film (6) is smaller than the inner diameter of the rotating cylinder (3). The lower side of the rotating cylinder (3) is provided with a plurality of second through holes (11). The plurality of second through holes (11) are connected to the plurality of first through holes (10) through the rotating cylinder (3). A guide plate (12) is fixedly connected to the lower side of the rotating drum (3), and the guide plate (12) is located below a plurality of second through holes (11); The rotating drum (3) is fixedly connected to a connecting frame (13) located between the sliding frame (2) and the protective film (6). The connecting frame (13) is fixedly connected to two multi-stage telescopic shells (14) that are centrally symmetrically distributed. The telescopic ends of the multi-stage telescopic shells (14) are fixedly connected to a connecting frame (15). The connecting frame (15) is fixedly connected to a protective shell (16). The protective shell (16) is rotatably connected to a rotating component (17). The rotating component (17) is fixedly connected to an adjacent protective shell (16) with a torsion spring. The two ends of the first pull rope (8) pass through the two protective shells (16) respectively and are fixedly connected to the rotating component (17). The rotating component (17) is fixedly connected to a second pull rope (18) that is fixedly connected to the connecting frame (13). Both of the connecting frames (15) are fixedly connected to a connecting ring; The multi-stage telescopic shell (14) is fixedly connected to a corrugated pipe (19) which is fixedly connected to the connecting frame (13). The corrugated pipe (19) is fixedly connected to a connecting pipe (20) that passes through the rotating cylinder (3) and communicates with it. The sum of the flow areas of all the first through holes (10) is less than the sum of the flow areas of all the connecting pipes (20). The sliding frame (2) is fixedly connected to an electric push rod (21), and the sliding column (9) is fixedly connected to a T-shaped frame (22) located inside the rotating cylinder (3). The upper side of the T-shaped frame (22) is limited and rotatably connected to the telescopic end of the electric push rod (21). A fixed cylinder (23) is fixedly connected inside the rotating cylinder (3). The connecting pipe (20) passes through the fixed cylinder (23). Two guide grooves (24) are provided in the fixed cylinder (23) and are symmetrically distributed in the center. Both of the two guide grooves (24) are used to guide the movement of the T-shaped frame (22). The guide groove (24) consists of a straight groove and a spiral groove connected together, with the straight groove located below the spiral groove. The T-shaped frame (22) moves along the straight groove and spiral groove in the guide groove (24), and the lower side of the rotating drum (3) is used to squeeze the inner side of the protective film (6).

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