Liquid scraping roller

Abstract

The invention relates to the technical field of liquid scraping equipment, and discloses a liquid scraping roller which comprises an arc-shaped roller attached to a film, a mounting base is arranged at the end of the arc-shaped roller, a straight-through rotating connector is arranged at the end, away from the arc-shaped roller, of the mounting base, and a hollow cavity communicating with the straight-through rotating connector is formed in the arc-shaped roller. The bottoms of the mounting bases are in driving connection with speed reducing motors for driving the arc-shaped roller to rotate through universal couplings, liquid blocking rings are symmetrically arranged on the side end faces of the arc-shaped roller, and a liquid scraping mechanism attached to the surface of the arc-shaped roller is arranged between the mounting bases and used for scraping redundant cleaning liquid on the surface of the arc-shaped roller. According to the invention, residual liquid in the coating process can be effectively reduced, the damage to the film material is reduced, and the product quality is improved.

Description

Technical Field

[0001] The invention relates to the technical field of scraping equipment, in particular to a scraping roller. Background Art

[0002] NIPS is a non-solvent induced phase separation method. The steps of preparing microporous membranes by the NIPS method are to first dissolve the polymer of the membrane-forming material in a solvent to form a homogeneous solution at room temperature or an appropriate temperature, form the homogeneous solution into a membrane, and then slowly put it into an extractant that is more miscible with the solvent to extract the solvent, forming a two-phase structure with the polymer as the continuous phase and the extractant as the dispersed phase. Then remove the extractant to obtain a membrane product with a certain pore structure.

[0003] Chinese patent publication number CN116116667A discloses an adjustable scraping device suitable for a high-speed thermally induced phase separation microporous film production line, in which the microporous film is transported by a traction roller, and the extract on both sides of the microporous film is scraped by a scraping roller, and both ends of each scraping roller are provided with a driving and distance-adjusting device, through which the distance between the scraping roller and the microporous film can be adjusted, and at the same time, the scraping roller is provided with a scraping power, so that the surface extract can be scraped evenly and effectively without damaging the membrane surface; when the scraping roller is scraping, when tiny powder or other particles are attached to the surface of the scraping roller, the scraping roller can be adjusted to a cleaning station by the driving and distance-adjusting device, away from the microporous film, and reset to the working station after the cleaning is completed, with flexible conversion and accurate reset; the adjustable scraping device has the advantages of simple structure, reasonable design, convenient use, convenient scraping adjustment, good scraping effect, and flexible multi-station switching.

[0004] The existing scraping equipment is complicated to operate and mostly uses slender medium-high rollers. The relative position of the medium-high rollers and the membrane surface needs to be adjusted manually, and then the scraping effect is achieved through the speed difference between the rotation of the medium-high rollers and the membrane surface.

[0005] Therefore, it is necessary to provide a scraping roller to solve the above technical problems. Summary of the invention

[0006] The object of the present invention is to provide a scraping roller to solve the above technical problems.

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a liquid scraping roller, comprising an arc-shaped roller bonded to a film, a mounting seat is provided at the end of the arc-shaped roller, a straight-through rotary joint is provided at the end of the mounting seat facing away from the arc-shaped roller, a hollow cavity connected to the straight-through rotary joint is provided inside the arc-shaped roller, the bottom of the mounting seat is driven by a universal coupling to connect a reduction motor that drives the arc-shaped roller to rotate, a liquid-blocking ring is symmetrically provided on the side end surface of the arc-shaped roller, a liquid scraping mechanism bonded to the surface of the arc-shaped roller is provided between the mounting seats, and the liquid scraping mechanism is used to scrape off excess cleaning liquid on the surface of the arc-shaped roller.

[0008] Furthermore, the straight rotary joint and the arc roller are sealed by a shaft seal to avoid liquid leakage inside the hollow cavity and prevent the cleaning liquid from overflowing from the surface of the arc roller.

[0009] As a further solution of the present invention, the scraper mechanism includes an adjustable scraper and a scraper body, the scraper body is fixedly connected to the mounting seat, the adjustable scraper is rotatably connected to one side of the scraper body, a negative pressure chamber and an overflow chamber are provided on the surface of the adjustable scraper, the negative pressure chamber is connected to the bottom of the overflow chamber, and a drainage mechanism is provided inside the overflow chamber to drive the flow of liquid in the overflow chamber.

[0010] Furthermore, the negative pressure chamber is arranged in a narrow strip, and the negative pressure chamber is arranged at the end of the adjustable scraper away from the scraping body. The scraping body is in contact with the surface of the liquid retaining ring to prevent liquid from remaining on the surface of the liquid retaining ring, and the overflow chamber is an arc-shaped depression.

[0011] As a further solution of the present invention, the drainage mechanism includes a traction rope suspended in the middle of the overflow chamber, and the traction rope moves unidirectionally inside the overflow chamber through a driving mechanism. A liquid collecting chamber is opened inside the scraper body, and the liquid collecting chamber is connected with one side of the overflow chamber through a connecting chamber.

[0012] Furthermore, the traction rope is made of fiber material, and a negative pressure reflux pipe is provided at the bottom of the liquid collecting chamber for collecting the liquid inside the liquid collecting chamber.

[0013] As a further solution of the present invention, the driving mechanism includes a worm gear sleeved on the outer end surface of the universal joint, the worm gear is meshed with a driving gear, the driving gear is embedded in the interior of the scraper body, and the interior of the scraper body is symmetrically provided with driving wheels, the driving wheels are fixedly connected to the driving gears, the traction rope is wrapped around between the driving wheels, and the traction rope is driven to move by the driving wheels.

[0014] As a further solution of the present invention, a driven wheel is embedded in the end of the overflow chamber, and the outer end surface of the driven wheel is provided with a support plate that fits with the traction rope, and the support plate is provided with a fitting groove that matches the traction rope.

[0015] Furthermore, the driven wheel is arranged at one end of the moving direction of the traction rope, and the support plates can be provided in multiple groups. The support plates are distributed in a circular array along the outer surface of the driven wheel, and the support plates can be distributed in a tangent or embedded manner.

[0016] As a further solution of the present invention, a filtering mechanism for filtering liquid is embedded in the inner wall of the connecting cavity, and the filtering mechanism includes a filter sleeve, a filter plate and a flexible member. The filter sleeve is embedded in the inner wall of the connecting cavity, the filter plate is elastically arranged on the inner wall of the filter sleeve, the flexible member is embedded in the middle of the filter plate, and the inner diameter of the flexible member is adapted to the outer diameter of the traction rope.

[0017] Furthermore, the traction rope passes through the middle of the flexible member, and the filter plate is elastically arranged in the middle of the filter sleeve through an elastic member embedded in the inner wall of the filter sleeve, and the flexible member can be made of rubber.

[0018] As a further solution of the present invention, a cleaning mechanism is provided on the surface of the filter plate, and the cleaning mechanism includes a cleaning scraper rod rotatably connected to the filter plate through a rotating ring, the cleaning scraper rod is in contact with the surface of the filter plate, and a collecting chamber is provided on the inner wall of the filter sleeve, and one end of the cleaning scraper rod away from the rotating ring extends to the top of the collecting chamber, and an arc-shaped driving groove is provided on the inner wall of the collecting chamber, and a driving slider adapted to the driving groove is provided at the end of the cleaning scraper rod away from the rotating ring.

[0019] Furthermore, the cleaning scraper rods are arranged in an arc shape, and a plurality of groups of the cleaning scraper rods are arranged in a circular array around the rotating ring.

[0020] As a further solution of the present invention, the rotating ring includes a fixed ring and an inner rotating ring, the fixed ring and the inner rotating ring are rotatably connected, the fixed ring is fixedly connected to the cleaning scraper rod, the inner rotating ring is fixedly connected to the upper surface of the filter plate, a rotation gap is provided between the fixed ring and the inner rotating ring, an inclined block fixedly connected to the fixed ring is fixedly connected to the inner wall of the rotating gap, an elastic pin is elastically connected to the inside of the rotating gap, the elastic pin is elastically fitted with the inclined block, and the cross-section of the inclined block is triangular.

[0021] Furthermore, the inner rotating ring is provided with a through hole matched with the elastic pin rod, and the inner rotating ring is in contact with the outer end surface of the flexible member.

[0022] As a further solution of the present invention, the driving groove includes arc grooves and vertical grooves which are arranged in a cycle, the vertical grooves are arranged at equal intervals, and the vertical grooves are connected through the arc grooves.

[0023] When the present invention is in use, the reduction motor rotates the arc roller through the universal coupling to adjust the direction of the arc roller. The shaft seal cooperates with the spacer to achieve the sealing of the shaft head to prevent the leakage of volatile cleaning liquid gas. The liquid retaining ring is installed on both sides of the arc roller. When the liquid flows along the arc roller to both sides, the liquid retaining ring can prevent the liquid from flowing to the shaft seal part, reducing the possibility of liquid leakage. The arc roller is hollow and passes constant temperature water through a straight-through rotary joint to prevent the liquid from evaporating and crystallizing and scratching the film. At the same time, a scraping mechanism is also provided to scrape off excess cleaning liquid on the surface of the arc roller to avoid long-term adhesion and crystallization of the cleaning liquid. The cleaning after scraping can also be collected and reused. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0025] Figure 1 It is an overall schematic diagram of the present invention; Figure 2 It is a schematic diagram of the side end structure of the present invention; Figure 3 The present invention Figure 1 The enlarged structural diagram at A in the middle; Figure 4 It is a schematic diagram of the structure of the scraping mechanism of the present invention; Figure 5 The present invention Figure 4 The enlarged structural diagram at B in the middle; Figure 6 It is a schematic diagram of the structure of the adjustable scraper of the present invention; Figure 7 It is a schematic diagram of the internal structure of the scraping mechanism of the present invention; Figure 8 The present invention Figure 7 The enlarged structural diagram at E in the middle; Fig. 9 The present invention Figure 7 The enlarged structural diagram at C in the middle; Fig.10 It is a schematic diagram of the structure of the driven wheel of the present invention; Fig.11 It is a schematic diagram of the cross-sectional structure of the filtering mechanism of the present invention; Fig.12 It is a schematic diagram of the filter plate structure of the present invention; Fig.13 The present invention Figure 7 The enlarged structural diagram at D in the middle; Fig.14 It is a schematic diagram of the rotating ring structure of the present invention; Fig.15 The present invention Fig.14 The enlarged structural diagram at F in the middle; Fig.16It is a schematic diagram of the expanded state of the driving groove on the inner wall of the collection chamber of the present invention.

[0026] In the figure: 1, mounting seat; 2, curved roller; 3, liquid retaining ring; 4, straight rotary joint; 5, shaft seal; 6, hollow cavity; 7, scraping mechanism; 8, reduction motor; 9, universal coupling; 10, driving gear; 11, worm; 12, adjustable scraper; 13, negative pressure chamber; 14, scraping body; 15, overflow chamber; 16, traction rope; 17, liquid collecting chamber; 18, driving wheel; 19, connecting chamber; 20, support Support plate; 21. driven wheel; 22. fitting groove; 23. filtering mechanism; 24. filter plate; 25. cleaning scraper; 26. collecting chamber; 27. flexible member; 28. elastic member; 29. ​​driving groove; 30. filtering sleeve; 31. guide wheel; 32. driving slider; 33. rotating ring; 34. fixed ring; 35. inner rotating ring; 36. inclined block; 37. elastic pin rod; 38. vertical groove; 39. arc groove. DETAILED DESCRIPTION

[0027] Embodiment 1: Figure 1 - Figure 2 As shown, a scraping roller comprises an arc roller 2 which is bonded to a film, a mounting seat 1 is provided at the end of the arc roller 2, a straight rotary joint 4 is provided at the end of the mounting seat 1 which is away from the arc roller 2, a hollow cavity 6 which is connected to the straight rotary joint 4 is provided inside the arc roller 2, a reduction motor 8 which drives the arc roller 2 to rotate is connected to the bottom of the mounting seat 1 through a universal coupling 9, a liquid retaining ring 3 is symmetrically provided on the side end surface of the arc roller 2, a scraping mechanism 7 which is bonded to the surface of the arc roller 2 is provided between the mounting seats 1, and the scraping mechanism 7 is used to scrape off excess cleaning liquid on the surface of the arc roller 2.

[0028] Furthermore, the straight rotary joint 4 and the arc roller 2 are sealed by a shaft seal 5 to prevent liquid leakage inside the hollow cavity 6 and prevent the cleaning liquid from overflowing from the surface of the arc roller 2.

[0029] When in use, the reduction motor 8 rotates the arc roller 2 through the universal coupling 9, adjusts the direction of the arc roller 2, and the shaft seal cooperates with the spacer to achieve the sealing of the shaft head to prevent the volatile cleaning liquid gas from leaking. The liquid retaining ring 3 is installed on both sides of the arc roller 2. When the liquid flows to both sides along the arc roller 2, the liquid retaining ring 3 can prevent the liquid from flowing to the shaft seal part, reducing the possibility of liquid leakage. The interior of the arc roller is hollow, and constant temperature water is passed through the interior of the arc roller through the straight-through rotary joint 4 to prevent the liquid from evaporating and crystallizing and scratching the film. At the same time, a scraping mechanism 7 is also provided to scrape off excess cleaning liquid on the surface of the arc roller 2 to avoid long-term adhesion and crystallization of the cleaning liquid, and the cleaning after scraping can also be collected and reused.

[0030] Embodiment 2: Based on embodiment 1, Figure 1-6As shown, the scraper mechanism 7 includes an adjustable scraper 12 and a scraper body 14. The scraper body 14 is fixedly connected to the mounting seat 1. The adjustable scraper 12 is rotatably connected to one side of the scraper body 14. A negative pressure chamber 13 and an overflow chamber 15 are provided on the surface of the adjustable scraper 12. The negative pressure chamber 13 is connected to the bottom of the overflow chamber 15. A drainage mechanism is provided inside the overflow chamber 15 to drive the liquid in the overflow chamber 15 to flow.

[0031] Furthermore, the negative pressure chamber 13 is arranged in a narrow strip, and the negative pressure chamber 13 is arranged at the end of the adjustable scraper 12 away from the scraper body 14. The scraper body 14 is in contact with the surface of the liquid retaining ring 3 to prevent liquid from remaining on the surface of the liquid retaining ring 3, and the overflow chamber 15 is an arc-shaped depression.

[0032] When in use, the scraping mechanism 7 is provided with an adjustable scraper 12 connected to the scraping body 14. The adjustable scraper 12 can adjust the distance and angle with the surface of the arc roller 2. In order to prevent the liquid on the surface of the adjustable scraper 12 from remaining and crystallizing to affect the scraping effect or the crystal shedding to affect the film quality, a negative pressure chamber 13 and an overflow chamber 15 are provided. The negative pressure chamber 13 and the overflow chamber 15 are arranged at the end of the adjustable scraper 12 away from the scraping body 14, so that the liquid scraped by the adjustable scraper 12 flows into the overflow chamber 15 and the negative pressure chamber 13. At the same time, the overflow chamber 15 has a larger capacity than the negative pressure chamber 13, and a drainage mechanism is provided inside the overflow chamber 15, so that the flow of liquid inside the overflow chamber 15 makes it difficult for the liquid on the surface of the adjustable scraper 12 to accumulate and remain. At the same time, the flow of liquid in the overflow chamber 15 will form a negative pressure inside the negative pressure chamber 13, thereby further avoiding liquid residue on the surface of the adjustable scraper 12, improving the scraping effect of the adjustable scraper 12 and the quality of the film product.

[0033] like Figure 1 - Figure 7 and Fig.13 As shown, the drainage mechanism includes a traction rope 16 suspended in the middle of the overflow chamber 15, and the traction rope 16 moves unidirectionally inside the overflow chamber 15 through a driving mechanism. A liquid collecting chamber 17 is opened inside the scraper body 14, and the liquid collecting chamber 17 is connected to one side of the overflow chamber 15 through a connecting chamber 19.

[0034] Furthermore, the traction rope 16 is made of fiber material, and a negative pressure reflux pipe is provided at the bottom of the liquid collecting chamber 17 for collecting the liquid inside the liquid collecting chamber 17 .

[0035] When in use, the liquid tension drives the liquid in the overflow chamber 15 to flow, so that the liquid in the overflow chamber 15 flows to the inside of the liquid collecting chamber 17 through the connecting chamber 19 to be collected and reused.

[0036] like Figure 1 - Figure 3 and Figure 7 - Figure 8As shown, the driving mechanism includes a worm 11 sleeved on the outer end surface of the universal coupling 9, the worm 11 is meshed with a driving gear 10, the driving gear 10 is embedded in the interior of the wiper body 14, and the interior of the wiper body 14 is symmetrically provided with driving wheels 18, the driving wheels 18 are fixedly connected to the driving gear 10, and the traction rope 16 is wound around the driving wheels 18, and the traction rope 16 is driven to move by the driving wheels 18.

[0037] When in use, the worm 11 rotates coaxially with the universal coupling 9. When the universal coupling 9 rotates, the worm 11 is driven to rotate, thereby driving the driving gear 10 to rotate inside the scraper body 14, and driving the driving wheel 18 through the driving gear 10 to drive the movement of the traction rope 16, so that the traction rope 16 can move unidirectionally inside the overflow chamber 15 without the need for additional power drive, and synchronously with the rotation of the arc roller 2.

[0038] like Figure 1 - Figure 7 and Fig. 9 - Fig.10 As shown, a driven wheel 21 is embedded at the end of the overflow chamber 15 , and a support plate 20 fitted with the traction rope 16 is provided on the outer end surface of the driven wheel 21 , and a fitting groove 22 adapted to the traction rope 16 is provided on the support plate 20 .

[0039] Furthermore, the driven wheel 21 is arranged at one end of the moving direction of the traction rope 16, and the support plates 20 can be provided in multiple groups. The support plates 20 are distributed in a circular array along the outer surface of the driven wheel 21, and the support plates 20 can be distributed in a tangent or embedded manner.

[0040] When in use, a support plate 20 is provided at the end of the overflow chamber 15 so that the traction rope 16 is always suspended in the middle of the overflow chamber 15, avoiding the traction rope 16 from sticking to the inner wall of the overflow chamber 15 and affecting the drainage effect, and a support plate 20 is provided on the outer end face of the driven wheel 21. The movement of the traction rope 16 will cause the driven wheel 21 to drive the support plate 20 to rotate synchronously, and the rotation of the support plate 20 will also further push the liquid inside the overflow chamber 15 to the inside of the connecting chamber 19.

[0041] like Figure 1 - Figure 7 and Fig.11 - Fig.13 As shown, a filter mechanism 23 for filtering liquid is embedded in the inner wall of the connecting cavity 19, and the filter mechanism 23 includes a filter sleeve 30, a filter plate 24 and a flexible member 27. The filter sleeve 30 is embedded in the inner wall of the connecting cavity 19, the filter plate 24 is elastically arranged on the inner wall of the filter sleeve 30, and the flexible member 27 is embedded in the middle of the filter plate 24, and the inner diameter of the flexible member 27 is adapted to the outer diameter of the traction rope 16.

[0042] Furthermore, the traction rope 16 passes through the middle of the flexible member 27 , and the filter plate 24 is elastically arranged in the middle of the filter sleeve 30 through an elastic member 28 embedded in the inner wall of the filter sleeve 30 . The flexible member 27 can be made of rubber.

[0043] When in use, the traction rope 16 is passed through the inside of the flexible member 27, and the filter plate 24 is used to filter the liquid inside the connecting cavity 19 to prevent solid crystals from falling into the liquid collecting cavity 17. The flexible member 27 has a certain elastic force, and the adsorbed liquid in the traction rope 16 can be discharged to prevent the liquid in the traction rope 16 from being attached for a long time and causing crystallization. At the same time, the flexible member 27 is made of flexible material to reduce the wear on the traction rope 16, and the traction rope 16 can also be limited by providing a guide wheel 31.

[0044] like Figure 1 - Figure 7 and Fig.11 - Fig.16 As shown, a cleaning mechanism is provided on the surface of the filter plate 24, and the cleaning mechanism includes a cleaning scraper rod 25 rotatably connected to the filter plate 24 through a rotating ring 33. The cleaning scraper rod 25 is in contact with the surface of the filter plate 24, and a collecting chamber 26 is provided on the inner wall of the filter sleeve 30. One end of the cleaning scraper rod 25 away from the rotating ring 33 extends to the top of the collecting chamber 26, and an arc-shaped driving groove 29 is provided on the inner wall of the collecting chamber 26. The end of the cleaning scraper rod 25 away from the rotating ring 33 is provided with a driving slider 32 adapted to the driving groove 29.

[0045] Furthermore, the cleaning scraper rods 25 are arranged in an arc shape, and a plurality of cleaning scraper rods 25 are provided to be distributed in a circular array around the rotating ring 33 .

[0046] During use, if a large amount of solid crystals adhere to the surface of the filter plate 24, the filter holes of the filter plate 24 will be blocked, resulting in a large amount of liquid being retained on the surface of the filter plate 24. Therefore, a cleaning scraper 25 is provided. When the filter plate 24 is blocked, the resistance of the liquid increases, thereby causing the filter plate 24 to compress the elastic member 28 to move. The cleaning scraper 25 is provided with a driving slider 32 adapted to the driving groove 29. Under the action of the driving groove 29, the cleaning scraper 25 will rotate along the surface of the filter plate 24, thereby cleaning the residue on the surface of the filter plate 24, and the residual crystals will fall into the internal sedimentation of the driving groove 29 as the cleaning scraper 25 rotates, and the filter mechanism 23 can adopt an embedded design, which is convenient for replacing or cleaning the filter mechanism 23.

[0047] like Figure 1 - Figure 7 and Fig.11 - Fig.16As shown, the rotating ring 33 includes a fixed ring 34 and an inner rotating ring 35, the fixed ring 34 and the inner rotating ring 35 are rotatably connected, the fixed ring 34 is fixedly connected to the cleaning scraper rod 25, the inner rotating ring 35 is fixedly connected to the upper surface of the filter plate 24, a rotating gap is provided between the fixed ring 34 and the inner rotating ring 35, a ramp block 36 fixedly connected to the fixed ring 34 is fixedly connected to the inner wall of the rotating gap, an elastic pin rod 37 is elastically connected inside the rotating gap, the elastic pin rod 37 is elastically fitted with the ramp block 36, and the cross-section of the ramp block 36 is a triangle.

[0048] Furthermore, the inner rotating ring 35 is provided with a through hole adapted to the elastic pin rod 37 , and the inner rotating ring 35 is in contact with the outer end surface of the flexible member 27 .

[0049] like Figure 1 - Figure 7 and Fig.11 - Fig.16 As shown, the driving groove 29 includes arc grooves 39 and vertical grooves 38 that are cyclically arranged. The vertical grooves 38 are arranged at equal intervals, and the vertical grooves 38 are connected through the arc grooves 39.

[0050] When in use, when the surface resistance of the filter plate 24 is too large, the filter plate 24 compresses the elastic member 28 and moves downward, and the cleaning scraper rod 25 is driven to rotate through the arc groove 39. The cleaning scraper rod 25 rotates while driving the fixing ring 34 to rotate, so that the inclined surface block 36 compresses the elastic pin rod 37, and the elastic pin rod 37 extends from the inner rotating ring 35 and abuts against the flexible member 27, so that the friction between the flexible member 27 and the traction rope 16 is increased, and the filter plate 24 will be further driven to move downward and the cleaning scraper rod 25 will be further rotated under the friction force of the traction rope 16. When the filter plate 24 moves down to the bottom, the elastic pin rod 37 slides to the end of the inclined surface block 36 and is retracted into the rotating gap, so that the friction between the flexible member 27 and the traction rope 16 is reduced, and at this time, the driving slider 32 also slides to the vertical groove 38 and the bottom of the arc groove 39. Under the elastic force of the elastic member 28, the driving slider 32 is driven to move upward along the vertical groove 38, and the filter plate 24 is driven to reset until the next time the surface resistance of the filter plate 24 is too high.

[0051] Working principle: the reduction motor 8 rotates the arc roller 2 through the universal coupling 9, adjusts the direction of the arc roller 2, and the shaft seal cooperates with the spacer to achieve the sealing of the shaft head to prevent the volatile cleaning liquid gas from leaking. The liquid retaining ring 3 is installed on both sides of the arc roller 2. When the liquid flows along the arc roller 2 to both sides, the liquid retaining ring 3 can prevent the liquid from flowing to the shaft seal part, reducing the possibility of liquid leakage. The arc roller is hollow inside, and constant temperature water is passed through the arc roller through the straight-through rotary joint 4 to prevent the liquid from evaporating and crystallizing and scratching the film. At the same time, a scraping mechanism 7 is also provided to scrape off the excess cleaning liquid on the surface of the arc roller 2 to avoid the cleaning liquid from long-term adhesion and crystallization. After scraping, it can also be collected and reused. The scraping mechanism 7 is provided with an adjustable scraper 12 connected to the scraper body 14, and the adjustable scraper 12 is adjustable. The distance and angle from the surface of the arc roller 2 are such that in order to prevent the liquid on the surface of the adjustable scraper 12 from remaining and crystallizing to affect the scraping effect or the crystal shedding to affect the film quality, a negative pressure chamber 13 and an overflow chamber 15 are provided. The negative pressure chamber 13 and the overflow chamber 15 are arranged at the end of the adjustable scraper 12 away from the scraping body 14, so that the liquid scraped by the adjustable scraper 12 flows into the overflow chamber 15 and the negative pressure chamber 13. At the same time, the volume of the overflow chamber 15 is larger than that of the negative pressure chamber 13, and a drainage mechanism is provided inside the overflow chamber 15, so that the flow of the liquid inside the overflow chamber 15 makes it difficult for the liquid on the surface of the adjustable scraper 12 to accumulate and remain. At the same time, the flow of the liquid in the overflow chamber 15 will form a negative pressure inside the negative pressure chamber 13, thereby further avoiding the liquid residue on the surface of the adjustable scraper 12 and improving the adjustable The scraping effect of the scraper 12 and the quality of the membrane product, the traction rope 16 is made of fiber material, and a negative pressure reflux pipe is provided at the bottom of the liquid collecting chamber 17 to collect the liquid inside the liquid collecting chamber 17. The worm 11 rotates coaxially with the universal coupling 9. When the universal coupling 9 rotates, the driving worm 11 rotates, thereby driving the driving gear 10 to rotate inside the scraping body 14, and driving the driving wheel 18 to drive the movement of the traction rope 16 through the driving gear 10, so that the traction rope 16 can move unidirectionally inside the overflow chamber 15 without additional power drive, and it is synchronized with the rotation of the arc roller 2. The end of the overflow chamber 15 is provided with a support plate 20 so that the traction rope 16 is always suspended in the middle of the overflow chamber 15 to prevent the traction rope 16 from fitting against the inner wall of the overflow chamber 15 The outer end surface of the driven wheel 21 is provided with a support plate 20. The movement of the traction rope 16 will cause the driven wheel 21 to drive the support plate 20 to rotate synchronously. The rotation of the support plate 20 will also further push the liquid in the overflow chamber 15 to the inside of the connecting chamber 19. The traction rope 16 passes through the inside of the flexible member 27. The filter plate 24 is used to filter the liquid in the connecting chamber 19 to prevent solid crystals from falling into the liquid collecting chamber 17. The flexible member 27 has a certain elastic force, and the adsorbed liquid in the traction rope 16 can be discharged to prevent the long-term attachment of the liquid in the traction rope 16 and cause crystallization. At the same time, the flexible member 27 is made of flexible material to reduce the wear on the traction rope 16, and the traction rope 16 can also be limited by providing a guide wheel 31.If a large amount of solid crystals adhere to the surface of the filter plate 24, the filter holes of the filter plate 24 will be blocked, resulting in a large amount of liquid being retained on the surface of the filter plate 24. Therefore, a cleaning scraper 25 is provided. When the filter plate 24 is blocked, the resistance of the liquid increases, thereby causing the filter plate 24 to compress the elastic member 28 to move. The cleaning scraper 25 is provided with a driving slider 32 adapted to the driving groove 29. Under the action of the driving groove 29, the cleaning scraper 25 will rotate along the surface of the filter plate 24, thereby cleaning the residue on the surface of the filter plate 24, and the residual crystals will fall into the internal sedimentation of the driving groove 29 as the cleaning scraper 25 rotates, and the filter mechanism 23 can adopt an embedded design, which is convenient for replacing or cleaning the filter mechanism 23. When the surface resistance of the filter plate 24 is too large, the filter plate 24 compresses the elastic member 28 and moves downward, and the cleaning scraper 25 will be driven to rotate through the arc groove 39. The cleaning scraper rod 25 rotates and drives the fixing ring 34 to rotate, so that the inclined surface block 36 compresses the elastic pin rod 37, and the elastic pin rod 37 extends from the inner rotating ring 35 and abuts against the flexible member 27, so that the friction between the flexible member 27 and the traction rope 16 is increased. Under the friction of the traction rope 16, the filter plate 24 will be further driven to move downward and the cleaning scraper rod 25 will be further rotated. When the filter plate 24 moves down to the bottom, the elastic pin rod 37 slides to the end of the inclined surface block 36 and retracts into the rotating gap, so that the friction between the flexible member 27 and the traction rope 16 is reduced, and at this time, the driving slider 32 also slides to the bottom of the vertical groove 38 and the arc groove 39. Under the elastic force of the elastic member 28, the driving slider 32 is driven to move up along the vertical groove 38, and the filter plate 24 is driven to reset until the next time the surface resistance of the filter plate 24 is too high.

Claims

1. A scraping roller, comprising an arc-shaped roller in contact with a film, characterized in that: A mounting seat is provided at the end of the arc roller, and a straight-through rotary joint is provided at the end of the mounting seat facing away from the arc roller. A hollow cavity connected to the straight-through rotary joint is provided inside the arc roller. The bottom of the mounting seat is connected to a reduction motor that drives the arc roller to rotate through a universal coupling. A liquid-blocking ring is symmetrically provided on the side end surface of the arc roller. A scraping mechanism that fits the surface of the arc roller is provided between the mounting seats, and the scraping mechanism is used to scrape off excess cleaning liquid on the surface of the arc roller.

2. A scraping roller according to claim 1, characterized in that: The scraper mechanism includes an adjustable scraper and a scraper body, the scraper body is fixedly connected to the mounting seat, the adjustable scraper is rotatably connected to one side of the scraper body, a negative pressure chamber and an overflow chamber are provided on the surface of the adjustable scraper, the negative pressure chamber is connected to the bottom of the overflow chamber, and a drainage mechanism is provided inside the overflow chamber to drive the liquid in the overflow chamber to flow.

3. A scraping roller according to claim 2, characterized in that: The drainage mechanism includes a traction rope suspended in the middle of the overflow chamber, and the traction rope moves unidirectionally inside the overflow chamber through a driving mechanism. A liquid collecting chamber is opened inside the scraper body, and the liquid collecting chamber is connected to one side of the overflow chamber through a connecting chamber.

4. A scraping roller according to claim 3, characterized in that: The driving mechanism includes a worm gear sleeved on the outer end surface of the universal coupling, the worm gear is meshed and driven with a driving gear, the driving gear is embedded in the interior of the scraper body, and the interior of the scraper body is symmetrically provided with driving wheels, the driving wheels are fixedly connected to the driving gears, the traction rope is wound between the driving wheels, and the traction rope is driven to move by the driving wheels.

5. A scraping roller according to claim 4, characterized in that: A driven wheel is embedded at the end of the overflow chamber, and a support plate fitted with a traction rope is provided on the outer end surface of the driven wheel, and a fitting groove adapted to the traction rope is provided on the support plate.

6. A scraping roller according to claim 5, characterized in that: The inner wall of the connecting cavity is embedded with a filtering mechanism for filtering the liquid, and the filtering mechanism includes a filtering sleeve, a filter plate and a flexible member. The filtering sleeve is embedded in the inner wall of the connecting cavity, the filter plate is elastically arranged on the inner wall of the filtering sleeve, the flexible member is embedded in the middle of the filter plate, and the inner diameter of the flexible member is adapted to the outer diameter of the traction rope.

7. A scraping roller according to claim 6, characterized in that: A cleaning mechanism is provided on the surface of the filter plate, and the cleaning mechanism includes a cleaning scraper rod rotatably connected to the filter plate through a rotating ring, the cleaning scraper rod is in contact with the surface of the filter plate, a collecting chamber is provided on the inner wall of the filter sleeve, one end of the cleaning scraper rod away from the rotating ring extends to the top of the collecting chamber, an arc-shaped driving groove is provided on the inner wall of the collecting chamber, and a driving slider matched with the driving groove is provided on the end of the cleaning scraper rod away from the rotating ring.

8. A scraping roller according to claim 7, characterized in that: The rotating ring includes a fixed ring and an inner rotating ring, the fixed ring and the inner rotating ring are rotatably connected, the fixed ring is fixedly connected to the cleaning scraper rod, the inner rotating ring is fixedly connected to the upper surface of the filter plate, a rotating gap is provided between the fixed ring and the inner rotating ring, an inclined block fixedly connected to the fixed ring is fixedly connected to the inner wall of the rotating gap, an elastic pin is elastically connected inside the rotating gap, the elastic pin is elastically fitted with the inclined block, and the cross-section of the inclined block is triangular.

9. A scraping roller according to claim 8, characterized in that: The driving groove comprises arc grooves and vertical grooves which are arranged in a cycle. The vertical grooves are arranged at equal intervals, and the vertical grooves are connected through the arc grooves.

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