A cooling unit for preparing thin film

Abstract

The present invention discloses a cooling unit for preparing a film, comprising a plurality of cooling rollers, the cooling roller comprising a roller body, end shafts being arranged at both ends of the roller body, a cooling assembly being arranged inside the roller body, the cooling assembly comprising an end plate, a guide positioning rod, an inner cooling pipe, and a tube transfer frame, one end of the inner cooling pipe being U-shaped, the inner cooling pipe and the guide positioning rod being fixedly arranged on the tube transfer frame, the end plate being rotatably clamped between a limiting ring and an end shaft, the limiting ring being fixedly connected to the end shaft, cooling water flowing in the inner cooling pipe, and heat transfer oil being poured between the inner cooling pipe and the inner wall of the roller body. The present invention arranges an inner cooling pipe inside the cooling roller and pours heat transfer oil, the inner cooling pipe is immersed in the heat transfer oil, and scale will not be generated on the inner wall of the cooling roller. When thick scale is generated in the inner cooling pipe later, the cooling assembly can be directly taken out from the cooling roller and the inner cooling pipe can be replaced, which is convenient for operation and can reduce maintenance costs.

Description

Technical Field

[0001] The invention relates to the technical field of plastic film preparation machinery, in particular to a cooling unit for preparing the film. Background Art

[0002] BOPP film is a polymer film widely used in packaging, printing and labeling. It has high strength, good transparency, excellent barrier properties and stiffness. The production of BOPP film mainly includes the following steps: raw material preparation, extrusion film, biaxial stretching, cooling and shaping, cutting and winding. After extrusion film, the film needs to be biaxially stretched. After biaxial stretching, the film is cooled and shaped. Cooling and shaping can eliminate the residual stress of the film and make the film have stable physical properties.

[0003] At present, the cooling of the film is mainly achieved by conveying the film with a cooling roller. The cooling roller filled with water can also take away the heat from the film while conveying the film, thereby achieving the cooling effect. Since the water temperature inside the cooling roller will gradually increase during cooling, scale will gradually form inside it. If the scale accumulates too thickly, it will seriously affect the cooling effect of the cooling roller on the film. For small and medium-sized film-making equipment, it can be dealt with by directly replacing the cooling roller. However, for large or super-large film-making equipment covering thousands of square meters, the cost of directly replacing the cooling roller is extremely high. The more conventional maintenance method of the enterprise is to remove the cooling roller and have the staff or robot crawl into the cooling roller to remove the scale. In addition, there are usually several cooling rollers that need to be descaled. The whole process takes a long time, and the time cost of equipment downtime is not low. To this end, we have proposed a cooling unit for preparing films. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies of the prior art and provide a cooling unit for preparing a film.

[0005] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a cooling unit for preparing a film, comprising a plurality of cooling rollers arranged in parallel with each other, a frame is provided on the left and right sides of the cooling roller, the cooling roller comprises a roller body, a detachable end shaft is installed at the left and right ends of the roller body, a cooling assembly is arranged in the roller body, the cooling assembly comprises an end plate, a guide positioning rod, an inner cooling pipe, and a tube transfer frame, one end of the inner cooling pipe is U-shaped, the guide positioning rod is arranged at the U-shaped mouth of the inner cooling pipe and is parallel to the inner cooling pipe, and a plurality of tube transfer frames are arranged in a plurality of tube transfer frames. The frame is arranged at equal intervals along the guide positioning rod, the inner cooling pipe and the guide positioning rod are fixedly mounted on the hosting moving frame, the other end of the inner cooling pipe is provided with a water inlet and a water outlet, the water inlet and the water outlet are respectively connected with the water inlet joint and the water outlet joint at the end plate, the end plate is rotatably clamped between the limiting ring and the end shaft, the limiting ring is fixedly connected to the end shaft, cooling water flows in the inner cooling pipe, heat transfer oil is poured between the inner cooling pipe and the inner wall of the roller body, and the inner cooling pipe is immersed in the heat transfer oil.

[0006] It is further explained that the supporting transfer frame includes a main frame, a middle installation position for clamping the guide positioning rod is provided at the center of the main frame, the main frame is provided with support arm parts on the left and right sides of the middle installation position respectively, and the main frame is provided with a supporting fixing mechanism for clamping the water inlet pipe part and the water outlet pipe part of the inner cooling pipe on the upper side of the middle installation position, and rugby-shaped rollers are installed at the four corners of the main frame, the central axis of each roller is equidistant from the central axis of the roller body, and the roller is in rolling contact with the inner wall of the roller body.

[0007] It is further explained that the hosting fixing mechanism includes a first tube clamping member, a second tube clamping member, a movable connecting member, and a locking rod. The first tube clamping member and the second tube clamping member are symmetrically arranged on the left and right sides of the main frame and are both movably hinged to the main frame. The movable connecting member is arranged between the first tube clamping member and the second tube clamping member. The lower side of the movable connecting member is respectively provided with a front convex shaft portion and a rear convex shaft portion. The front convex shaft portion is slidably connected to the first slot hole portion of the first tube clamping member, and the rear convex shaft portion is slidably connected to the second slot hole portion of the second tube clamping member. The upper side of the movable connecting member is rotatably connected to the lower end of the locking rod, and the upper end of the locking rod is threadedly connected to the welding nut at the main frame. Rotating the locking rod can drive the first tube clamping member and the second tube clamping member on both sides to be pressed down synchronously.

[0008] To further explain, the main frame is provided with a first hinge axis hinged to the first tube clamping member, and a second hinge axis hinged to the second tube clamping member, the first hinge axis and the second hinge axis are located at the same height and are parallel to each other, an intermediate clamping rod member for clamping the guide positioning rod is hingedly provided at the first hinge axis, the movable connecting member is located between the intermediate clamping rod member and the first tube clamping member, and the main frame is provided with a clamping rod slot matching the intermediate clamping rod member at the intermediate mounting position.

[0009] It is further explained that an upper wheel component and a lower wheel component are provided in the clamp rod groove, and the central axes of the upper wheel component and the lower wheel component are parallel to the central axis of the guide positioning rod. The middle clamp rod component can be deflected downward to clamp the guide positioning rod between the upper wheel component and the lower wheel component.

[0010] It is further explained that the limit ring is arranged at the inner end of the end plate, and the outer end of the end plate is provided with a limit bolt portion, and the limit bolt portion is clamped with the rotation limit mechanism, and the limit bolt portion is arranged between the water inlet joint and the water outlet joint, and the rotation limit mechanism includes a limit lock card and a fixed support, the upper end of the fixed support is fixedly connected to the limit lock card, and the lower end of the fixed support is connected to the roller seat of the cooling roller.

[0011] It is further explained that the two sides of the limit lock card are respectively provided with a first pipe insertion port and a second pipe insertion port for inserting the water inlet pipe and the water outlet pipe, and a limit card slot is provided between the first pipe insertion port and the second pipe insertion port, and the limit card slot is engaged with the limit card bolt part of the end plate.

[0012] It is further explained that a maintenance fence for inspecting and monitoring the working condition of the cooling unit is provided on the upper side of the rack, and a ladder is provided along the maintenance fence.

[0013] The beneficial effects of the present invention are:

[0014] First, the present invention arranges an inner cooling tube in the cooling roller and fills it with heat transfer oil. The inner cooling tube is immersed in the heat transfer oil. When the cooling roller conveys the film, the heat at the film is transferred to the cooling roller. The heat transfer oil transfers the heat from the surface of the cooling roller to the inner cooling tube. The water flow conveyed in the inner cooling tube takes away the heat. Since the cooling roller is filled with heat transfer oil, the inner wall of the cooling roller will not produce scale. When thick scale is produced in the inner cooling tube and needs to be cleaned, the cooling assembly can be directly taken out of the cooling roller and the inner cooling tube can be replaced. Compared with the maintenance method of removing the cooling roller and then having the staff or robot crawl into the cooling roller to clean the scale, this structural design is convenient to operate and can effectively reduce the maintenance cost, so it is suitable for large or super large film making equipment.

[0015] 2. The cooling assembly of the present invention adopts the structural design of a trustee-transfer frame, and the rollers at the trustee-transfer frame are in rolling contact with the inner wall of the roller body, so that the whole set of cooling assembly can be taken out from the cooling roller. A trustee-fixing mechanism is arranged at the trustee-transfer frame, and the first tube clamping member and the second tube clamping member of the trustee-fixing mechanism are arranged in a left-right distribution, and the two are staggered at the front and rear sides of the movable connecting member, and the middle clamping rod member is just arranged at the rear side of the first tube clamping member and is hinged at the first hinge axis. The clamping of the guide positioning rod by the middle clamping rod member will not affect the clamping of the inner cooling tube by the first and second tube clamping members, thereby effectively solving the clamping and fixing problems of the inner cooling tube and the guide positioning rod arranged at its U-shaped mouth, and avoiding the structural interference situation that one side cannot be clamped after the other side completes the clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention.

[0017] Figure 2 It is a schematic diagram of the structure of the cooling roller.

[0018] Figure 3 It is a structural cross-sectional view of the cooling roller.

[0019] Figure 4 It is a structural cross-sectional view of the cooling roller.

[0020] Figure 5 It is a structural cross-sectional view of the cooling roller.

[0021] Figure 6 It is a schematic diagram of the structural decomposition of the rotation limiting mechanism at the cooling roller.

[0022] Figure 7 It is a schematic diagram of the structure of the rotation limiting mechanism at the cooling roller.

[0023] Figure 8 This is a schematic diagram of the structure of the hosting transfer frame before the clamping guide positioning rod.

[0024] Fig. 9 This is a schematic diagram of the structure of the tube transfer frame before the cooling tube is pressed inside the clamp.

[0025] Fig.10 It is a schematic diagram of the structure of the tube-carrying transfer frame when cooling the tube in the clamp.

[0026] Fig.11 This is a schematic diagram of the structure of the managed fixed organization.

[0027] Figure numbers: 10, cooling roller; 11, roller body; 111, oil delivery hole; 12, end shaft; 20, frame; 21, maintenance fence; 22, ladder; 30, cooling assembly; 31, end plate; 311, water inlet joint; 312, water outlet joint; 313, limit bolt part; 32, guide positioning rod; 33, inner cooling pipe; 331, water inlet pipe opening; 332, water outlet pipe opening; 333, water inlet pipe part; 334, water outlet pipe part; 34, hosting and moving frame; 341, main frame; 3411, clamping rod notch; 3412, bolt hole; 342, supporting arm part; 343, roller; 344, first hinge shaft; 345, second hinge shaft; 346, middle clamping rod; 347, locking bolt; 348, upper wheel part; 349, lower wheel part;

[0028] 35. Limiting ring; 36. Trustee fixing mechanism; 361. First tube clamp; 3611. First slotted hole portion; 362. Second tube clamp; 3621. Second slotted hole portion; 363. Active connecting piece; 3631. Front convex shaft portion; 3632. Rear convex shaft portion; 364. Locking rod; 3641. Screw portion; 3642. Handle portion; 365. Welding nut; 40. Rotation limiting mechanism; 41. Limiting locking card; 411. First tube insertion port; 412. Second tube insertion port; 413. Limiting card slot; 42. Fixed support; 50. Roller seat; 61. Water inlet pipe; 62. Water outlet pipe. DETAILED DESCRIPTION

[0029] In order to make the objectives, technical solutions and advantages of the present invention more clear, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] Specific embodiment 1: Combined with the attached Figure 1 As shown, a cooling unit for preparing a film includes a plurality of cooling rollers 10 arranged in parallel with each other, and a frame 20 is provided on the left and right sides of the cooling roller 10. Figure 2 To Attachment Figure 5 As shown, the cooling roller 10 includes a roller body 11, and detachable end shafts 12 are installed at the left and right ends of the roller body 11. The end shaft 12 is specifically equipped with a sprocket for driving the cooling roller 10 to rotate. A cooling assembly 30 is provided in the roller body 11, and the cooling assembly 30 is specifically divided into two groups. One group of cooling assemblies 30 is respectively provided at the end shafts 12 at both ends of the roller body 11.

[0031] Combined with Figure 4 and attached Figure 5As shown, the cooling assembly 30 includes an end plate 31, a guide positioning rod 32, an inner cooling pipe 33, and a trustee moving frame 34. One end of the inner cooling pipe 33 is U-shaped. The guide positioning rod 32 is arranged at the U-shaped mouth of the inner cooling pipe 33 and is parallel to the inner cooling pipe 33. A plurality of trustee moving frames 34 are arranged at equal intervals along the guide positioning rod 32. The inner cooling pipe 33 and the guide positioning rod 32 are fixedly mounted on the trustee moving frame 34. The other end of the inner cooling pipe 33 is provided with a water inlet pipe The water inlet 331 and the water outlet 332 are connected to the water inlet joint 311 and the water outlet joint 312 at the end plate 31 respectively. The end plate 31 is rotatably clamped between the limit ring 35 and the end shaft 12. The limit ring 35 is fixedly connected to the end shaft 12. Cooling water flows in the inner cooling pipe 33. Heat transfer oil is poured between the inner cooling pipe 33 and the inner wall of the roller body 11. The inner cooling pipe 33 is immersed in the heat transfer oil. The roller body 11 of the cooling roller 10 is specifically provided with an oil delivery hole 111 for injecting or discharging heat transfer oil, and a detachable sealing plug is specifically provided at the oil delivery hole 111.

[0032] When the cooling roller 10 is conveying a film, the heat of the film is transferred to the cooling roller 10, and the heat transfer oil transfers the heat from the surface of the cooling roller 10 to the inner cooling pipe 33. The water flow conveyed in the inner cooling pipe 33 then takes away the heat. Since the cooling roller 10 is filled with heat transfer oil, the inner wall of the cooling roller 10 will not produce scale. When thick scale is produced in the inner cooling pipe 33 and needs to be cleaned, the inner wall of the cooling roller 10 will be cleaned with the help of the attached Figure 5 As shown, the cooling assembly 30 can be directly taken out from the cooling roller 10 and the inner cooling tube 33 can be replaced. Compared with the maintenance method of removing the cooling roller and then having a worker or a robot crawl into the cooling roller to clean the scale, this structural design is convenient to operate and can effectively reduce maintenance costs, making it suitable for large or ultra-large film-making equipment.

[0033] Combined with Figure 5 and attached Figure 8As shown, the trustee-transfer frame 34 includes a main frame 341, a middle installation position for clamping the guide positioning rod 32 is provided at the center of the main frame 341, and support arms 342 are provided on the left and right sides of the middle installation position of the main frame 341, and a trustee-fixing mechanism 36 for clamping the water inlet pipe 333 and the water outlet pipe 334 of the inner cooling pipe 33 is provided on the upper side of the middle installation position of the main frame 341, and rugby-shaped rollers 343 are installed at the four corners of the main frame 341, and the central axis of each roller 343 is equidistant from the central axis of the roller body 11, and the rollers 343 are in rolling contact with the inner wall of the roller body 11. When the cooling assembly 30 is taken out from the cooling roller 10, the guide positioning rod 32 can be directly pulled, and the rollers 343 at the trustee-transfer frame 34 are in rolling contact with the inner wall of the roller body 11, so that the entire cooling assembly 30 is taken out. The structural design of the supporting transfer frame 34 can not only effectively support the inner cooling tube 33 in the cooling roller 10 to prevent the inner cooling tube 33 with a longer span from bending and deformation, thereby improving the durability of the inner cooling tube 33, but also facilitate the removal and placement of the cooling assembly 30 at the cooling roller 10.

[0034] Since the guide positioning rod 32 is mainly used to make each of the trustee transfer frames 34 centered on the same straight line, it prevents a trustee transfer frame 34 from being misplaced and causing the entire cooling assembly 30 to be pushed into the cooling roller 10. The guide positioning rod 32 is arranged at the U-shaped opening of the inner cooling tube 33 and is parallel to the inner cooling tube 33. The structural design of the trustee transfer frame 34 must not only solve the problem of clamping and fixing the guide positioning rod 32 and the inner cooling tube 33, but also avoid the structural interference of the other side being unable to clamp after one side is clamped.

[0035] Combined with Figure 8 To Attachment Fig.11 As shown, the hosting fixing mechanism 36 includes a first clamping member 361, a second clamping member 362, a movable connecting member 363, and a locking rod 364. The first clamping member 361 and the second clamping member 362 are symmetrically arranged on the left and right sides of the main frame 341 and are both movably hinged to the main frame 341. The movable connecting member 363 is arranged between the first clamping member 361 and the second clamping member 362. The lower side of the movable connecting member 363 is respectively provided with a front convex shaft portion 3631 and a rear convex shaft portion 3632. The front convex shaft portion 3631 and the first slot portion 364 of the first clamping member 361 are connected to each other. 611 is slidingly connected, the rear convex shaft portion 3632 is slidingly connected to the second slot hole portion 3621 of the second clamping member 362, the upper side of the movable connecting member 363 is rotationally connected to the lower end of the locking rod 364, the upper end of the locking rod 364 is threadedly connected to the welding nut 365 at the main frame 341, and the upper end of the locking rod 364 is specifically provided with a screw portion 3641, and the upper end of the screw portion 3641 is provided with a handle portion 3642 for rotating the locking rod 364. Rotating the locking rod 364 can drive the first clamping member 361 and the second clamping member 362 on both sides to be pressed down synchronously.

[0036] The main frame 341 is provided with a first hinge axis 344 hinged to the first clamping member 361, and a second hinge axis 345 hinged to the second clamping member 362. The first hinge axis 344 and the second hinge axis 345 are located at the same height and are parallel to each other. An intermediate clamping rod 346 for clamping the guide positioning rod 32 is hingedly provided at the first hinge axis 344. The movable connecting member 363 is located between the intermediate clamping rod 346 and the first clamping member 361. The main frame 341 is provided with a clamping rod groove 3411 that matches the intermediate clamping rod 346 at the middle installation position. The main frame 341 is provided with a bolt hole 3412 for inserting the locking bolt 347 on the upper side of the first hinge axis 344. The first tube clamping member 361 and the second tube clamping member 362 which are distributed in the left and right directions are staggered at the front and rear sides of the movable connecting member 363, and the middle clamping rod member 346 is just arranged on the rear side of the first tube clamping member 361 and is hinged at the first hinge shaft 344. The clamping of the guide positioning rod 32 by the middle clamping rod member 346 will not affect the clamping of the inner cooling tube 33 by the first tube clamping member 361 and the second tube clamping member 362, thereby effectively solving the clamping and fixing problems of the guide positioning rod 32 and the inner cooling tube 33 respectively, and avoiding the structural interference situation that one side cannot be clamped after the other side completes the clamping.

[0037] An upper wheel 348 and a lower wheel 349 are provided in the clamping rod slot 3411 . The central axes of the upper wheel 348 and the lower wheel 349 are parallel to the central axis of the guide positioning rod 32 . The middle clamping rod 346 can be deflected downward to clamp the guide positioning rod 32 between the upper wheel 348 and the lower wheel 349 .

[0038] Before the guide positioning rod 32 is clamped, the trustee fixing mechanism 36 is provided. Figure 8 As shown, the middle clamping rod 346 must be pushed up first to expose the clamping rod slot 3411, and then the guide positioning rod 32 is placed into the clamping rod slot 3411. Subsequently, the middle clamping rod 346 is pushed down and the locking bolt 347 is inserted into the bolt hole 3412. The locking bolt 347 passes through the middle clamping rod 346, and the locking bolt 347 is specifically a bolt, so that the guide positioning rod 32 is clamped and fixed to the hosting fixing mechanism 36.

[0039] After the guide positioning rod 32 is clamped at the trustee fixing mechanism 36, Fig. 9 As shown, the locking rod 364 is rotated downward, and the locking rod 364 drives the first clamping member 361 and the second clamping member 362 on both sides to tilt upward, and then the water inlet pipe part 333 and the water outlet pipe part 334 of the inner cooling pipe 33 can be placed into the supporting arm parts 342 on both sides. Fig.10As shown, the locking rod 364 is rotated upward, and the locking rod 364 drives the first clamping member 361 and the second clamping member 362 on both sides to press down, thereby completing the clamping and fixing of the water inlet pipe portion 333 and the water outlet pipe portion 334 of the inner cooling pipe 33. After the clamping and fixing of the water inlet pipe portion 333 and the water outlet pipe portion 334 of the inner cooling pipe 33 are completed, the U-shaped bend portion of the inner cooling pipe 33 is welded between the water inlet pipe portion 333 and the water outlet pipe portion 334, and the clamping and fixing of the inner cooling pipe 33 is completed.

[0040] Combined with Figure 4 and attached Figure 5 As shown, the water inlet 331 and the water outlet 332 of the inner cooling pipe 33 are respectively connected to the water inlet joint 311 and the water outlet joint 312 at the end plate 31, and the end plate 31 is rotatably clamped between the limit ring 35 and the end shaft 12, and the limit ring 35 is fixedly connected to the end shaft 12. This structural design can realize that the inner cooling pipe 33 does not rotate synchronously with the cooling roller 10, and avoids the situation where the water inlet conveying pipe 61 and the water outlet conveying pipe 62 are entangled with each other. A sealing ring is specifically provided between the end plate 31 and the limit ring 35 and the end shaft 12 to prevent the thermal oil in the cooling roller 10 from leaking out. This is a conventional sealing structure design, so it will not be described in detail.

[0041] Combined with Figure 1 , Attachment Figure 6 and attached Figure 7 As shown, the limiting ring 35 is arranged at the inner end of the end plate 31, and the outer end of the end plate 31 is provided with a limiting bolt portion 313, which is engaged with the rotation limiting mechanism 40, and the limiting bolt portion 313 is arranged between the water inlet joint 311 and the water outlet joint 312. The rotation limiting mechanism 40 can specifically limit and fix the end shaft 12, prevent the inner cooling pipe 33 from being driven to deflect due to the surge of the heat transfer oil in the cooling roller 10, and further prevent the water inlet conveying pipe 61 and the water outlet conveying pipe 62 from being entangled with each other.

[0042] Combined with Figure 7 As shown, the rotation limiting mechanism 40 includes a limiting lock card 41 and a fixed support 42. The upper end of the fixed support 42 is fixedly connected to the limiting lock card 41, and the lower end of the fixed support 42 is connected to the roller seat 50 of the cooling roller 10. The first and second insertion ports 411 and 412 for inserting the water inlet and outlet pipes 61 and 62 are respectively provided on both sides of the limiting lock card 41. A limiting card slot 413 is provided between the first and second insertion ports 411 and 412. The limiting card slot 413 is engaged with the limiting card bolt portion 313 of the end plate 31. Specifically, the outlet pipe of the preceding cooling roller is connected to the inlet pipe of the following cooling roller, so that the inner cooling pipes of each cooling roller are connected to each other, and the high-pressure water flow output by the water pump can directly pass through the inner cooling pipes of each cooling roller, effectively improving the cooling efficiency.

[0043] Combined with Figure 1 As shown, a maintenance fence 21 for inspecting and monitoring the working condition of the cooling unit is provided on the upper side of a rack 20, and a ladder 22 is provided along the maintenance fence 21. The maintenance personnel can climb the ladder 22 to reach the maintenance fence 21 above the rack 20, so as to conveniently look down and observe the working conditions of various mechanisms of the cooling unit.

[0044] Specific embodiment 2: Combined with the attached Figure 1 As shown, a cooling unit for preparing a film includes a plurality of cooling rollers 10 arranged in parallel with each other, a frame 20 is provided on the left and right sides of the cooling roller 10, the cooling roller 10 includes a roller body 11, a detachable end shaft 12 is installed on the left and right ends of the roller body 11, the end shaft 12 is specifically equipped with a sprocket for driving the cooling roller 10 to rotate, a cooling assembly 30 is provided in the roller body 11, and the cooling assembly 30 is specifically a group.

[0045] Combined with Figure 4 and attached Figure 5 As shown, the cooling assembly 30 includes an end plate 31, a guide positioning rod 32, an inner cooling pipe 33, and a trustee moving frame 34. One end of the inner cooling pipe 33 is U-shaped. The guide positioning rod 32 is arranged at the U-shaped mouth of the inner cooling pipe 33 and is parallel to the inner cooling pipe 33. A plurality of trustee moving frames 34 are arranged at equal intervals along the guide positioning rod 32. The inner cooling pipe 33 and the guide positioning rod 32 are fixedly mounted on the trustee moving frame 34. The other end of the inner cooling pipe 33 is provided with a water inlet pipe The water inlet 331 and the water outlet 332 are connected to the water inlet joint 311 and the water outlet joint 312 at the end plate 31 respectively. The end plate 31 is rotatably clamped between the limit ring 35 and the end shaft 12. The limit ring 35 is fixedly connected to the end shaft 12. Cooling water flows in the inner cooling pipe 33. Heat transfer oil is poured between the inner cooling pipe 33 and the inner wall of the roller body 11. The inner cooling pipe 33 is immersed in the heat transfer oil. The roller body 11 of the cooling roller 10 is specifically provided with an oil delivery hole 111 for injecting or discharging heat transfer oil, and a detachable sealing plug is specifically provided at the oil delivery hole 111.

[0046] When the cooling roller 10 is conveying a film, the heat of the film is transferred to the cooling roller 10, and the heat transfer oil transfers the heat from the surface of the cooling roller 10 to the inner cooling pipe 33. The water flow conveyed in the inner cooling pipe 33 then takes away the heat. Since the cooling roller 10 is filled with heat transfer oil, the inner wall of the cooling roller 10 will not produce scale. When thick scale is produced in the inner cooling pipe 33 and needs to be cleaned, the inner wall of the cooling roller 10 will be cleaned with the help of the attached Figure 5As shown, the cooling assembly 30 can be directly taken out from the cooling roller 10 and the inner cooling tube 33 can be replaced. Compared with the maintenance method of removing the cooling roller and then having a worker or a robot crawl into the cooling roller to clean the scale, this structural design is convenient to operate and can effectively reduce maintenance costs, making it suitable for large or ultra-large film-making equipment.

[0047] Combined with Figure 5 and attached Figure 8 As shown, the trustee-transfer frame 34 includes a main frame 341, a middle installation position for clamping the guide positioning rod 32 is provided at the center of the main frame 341, and support arms 342 are provided on the left and right sides of the middle installation position of the main frame 341, and a trustee-fixing mechanism 36 for clamping the water inlet pipe 333 and the water outlet pipe 334 of the inner cooling pipe 33 is provided on the upper side of the middle installation position of the main frame 341, and rugby-shaped rollers 343 are installed at the four corners of the main frame 341, and the central axis of each roller 343 is equidistant from the central axis of the roller body 11, and the rollers 343 are in rolling contact with the inner wall of the roller body 11. When the cooling assembly 30 is taken out from the cooling roller 10, the guide positioning rod 32 can be directly pulled, and the rollers 343 at the trustee-transfer frame 34 are in rolling contact with the inner wall of the roller body 11, so that the entire cooling assembly 30 is taken out. The structural design of the supporting transfer frame 34 can not only effectively support the inner cooling tube 33 in the cooling roller 10 to prevent the inner cooling tube 33 with a longer span from bending and deformation, thereby improving the durability of the inner cooling tube 33, but also facilitate the removal and placement of the cooling assembly 30 at the cooling roller 10.

[0048] Since the guide positioning rod 32 is mainly used to make each of the trustee transfer frames 34 centered on the same straight line, it prevents a trustee transfer frame 34 from being misplaced and causing the entire cooling assembly 30 to be pushed into the cooling roller 10. The guide positioning rod 32 is arranged at the U-shaped opening of the inner cooling tube 33 and is parallel to the inner cooling tube 33. The structural design of the trustee transfer frame 34 must not only solve the problem of clamping and fixing the guide positioning rod 32 and the inner cooling tube 33, but also avoid the structural interference of the other side being unable to clamp after one side is clamped.

[0049] Combined with Figure 8 To Attachment Fig.11As shown, the hosting fixing mechanism 36 includes a first clamping member 361, a second clamping member 362, a movable connecting member 363, and a locking rod 364. The first clamping member 361 and the second clamping member 362 are symmetrically arranged on the left and right sides of the main frame 341 and are both movably hinged to the main frame 341. The movable connecting member 363 is arranged between the first clamping member 361 and the second clamping member 362. The lower side of the movable connecting member 363 is respectively provided with a front convex shaft portion 3631 and a rear convex shaft portion 3632. The front convex shaft portion 3631 and the first slot portion 364 of the first clamping member 361 are connected to each other. 611 is slidingly connected, the rear convex shaft portion 3632 is slidingly connected to the second slot hole portion 3621 of the second clamping member 362, the upper side of the movable connecting member 363 is rotationally connected to the lower end of the locking rod 364, the upper end of the locking rod 364 is threadedly connected to the welding nut 365 at the main frame 341, and the upper end of the locking rod 364 is specifically provided with a screw portion 3641, and the upper end of the screw portion 3641 is provided with a handle portion 3642 for rotating the locking rod 364. Rotating the locking rod 364 can drive the first clamping member 361 and the second clamping member 362 on both sides to be pressed down synchronously.

[0050] The main frame 341 is provided with a first hinge axis 344 hinged to the first clamping member 361, and a second hinge axis 345 hinged to the second clamping member 362. The first hinge axis 344 and the second hinge axis 345 are located at the same height and are parallel to each other. An intermediate clamping rod 346 for clamping the guide positioning rod 32 is hingedly provided at the first hinge axis 344. The movable connecting member 363 is located between the intermediate clamping rod 346 and the first clamping member 361. The main frame 341 is provided with a clamping rod groove 3411 that matches the intermediate clamping rod 346 at the middle installation position. The main frame 341 is provided with a bolt hole 3412 for inserting the locking bolt 347 on the upper side of the first hinge axis 344. The first tube clamping member 361 and the second tube clamping member 362 which are distributed in the left and right directions are staggered at the front and rear sides of the movable connecting member 363, and the middle clamping rod member 346 is just arranged on the rear side of the first tube clamping member 361 and is hinged at the first hinge shaft 344. The clamping of the guide positioning rod 32 by the middle clamping rod member 346 will not affect the clamping of the inner cooling tube 33 by the first tube clamping member 361 and the second tube clamping member 362, thereby effectively solving the clamping and fixing problems of the guide positioning rod 32 and the inner cooling tube 33 respectively, and avoiding the structural interference situation that one side cannot be clamped after the other side completes the clamping.

[0051] An upper wheel 348 and a lower wheel 349 are provided in the clamping rod slot 3411 . The central axes of the upper wheel 348 and the lower wheel 349 are parallel to the central axis of the guide positioning rod 32 . The middle clamping rod 346 can be deflected downward to clamp the guide positioning rod 32 between the upper wheel 348 and the lower wheel 349 .

[0052] Before the guide positioning rod 32 is clamped, the trustee fixing mechanism 36 is provided. Figure 8As shown, the middle clamping rod 346 must be pushed up first to expose the clamping rod slot 3411, and then the guide positioning rod 32 is placed into the clamping rod slot 3411. Subsequently, the middle clamping rod 346 is pushed down and the locking bolt 347 is inserted into the bolt hole 3412. The locking bolt 347 passes through the middle clamping rod 346, and the locking bolt 347 is specifically a bolt, so that the guide positioning rod 32 is clamped and fixed to the hosting fixing mechanism 36.

[0053] After the guide positioning rod 32 is clamped at the trustee fixing mechanism 36, Fig. 9 As shown, the locking rod 364 is rotated downward, and the locking rod 364 drives the first clamping member 361 and the second clamping member 362 on both sides to tilt upward, and then the water inlet pipe part 333 and the water outlet pipe part 334 of the inner cooling pipe 33 can be placed into the supporting arm parts 342 on both sides. Fig.10 As shown, the locking rod 364 is rotated upward, and the locking rod 364 drives the first clamping member 361 and the second clamping member 362 on both sides to press down, thereby completing the clamping and fixing of the water inlet pipe portion 333 and the water outlet pipe portion 334 of the inner cooling pipe 33. After the clamping and fixing of the water inlet pipe portion 333 and the water outlet pipe portion 334 of the inner cooling pipe 33 are completed, the U-shaped bend portion of the inner cooling pipe 33 is welded between the water inlet pipe portion 333 and the water outlet pipe portion 334, and the clamping and fixing of the inner cooling pipe 33 is completed.

[0054] Combined with Figure 4 and attached Figure 5 As shown, the water inlet 331 and the water outlet 332 of the inner cooling pipe 33 are respectively connected to the water inlet joint 311 and the water outlet joint 312 at the end plate 31, and the end plate 31 is rotatably clamped between the limit ring 35 and the end shaft 12, and the limit ring 35 is fixedly connected to the end shaft 12. This structural design can realize that the inner cooling pipe 33 does not rotate synchronously with the cooling roller 10, and avoids the situation where the water inlet conveying pipe 61 and the water outlet conveying pipe 62 are entangled with each other. A sealing ring is specifically provided between the end plate 31 and the limit ring 35 and the end shaft 12 to prevent the thermal oil in the cooling roller 10 from leaking out. This is a conventional sealing structure design, so it will not be described in detail.

[0055] Combined with Figure 1 , Attachment Figure 6 and attached Figure 7 As shown, the limiting ring 35 is arranged at the inner end of the end plate 31, and the outer end of the end plate 31 is provided with a limiting bolt portion 313, which is engaged with the rotation limiting mechanism 40, and the limiting bolt portion 313 is arranged between the water inlet joint 311 and the water outlet joint 312. The rotation limiting mechanism 40 can specifically limit and fix the end shaft 12, prevent the inner cooling pipe 33 from being driven to deflect due to the surge of the heat transfer oil in the cooling roller 10, and further prevent the water inlet conveying pipe 61 and the water outlet conveying pipe 62 from being entangled with each other.

[0056] Combined with Figure 7 As shown, the rotation limiting mechanism 40 includes a limiting lock card 41 and a fixed support 42. The upper end of the fixed support 42 is fixedly connected to the limiting lock card 41, and the lower end of the fixed support 42 is connected to the roller seat 50 of the cooling roller 10. The first and second insertion ports 411 and 412 for inserting the water inlet and outlet pipes 61 and 62 are respectively provided on both sides of the limiting lock card 41. A limiting card slot 413 is provided between the first and second insertion ports 411 and 412. The limiting card slot 413 is engaged with the limiting card bolt portion 313 of the end plate 31. Specifically, the outlet pipe of the preceding cooling roller is connected to the inlet pipe of the following cooling roller, so that the inner cooling pipes of each cooling roller are connected to each other, and the high-pressure water flow output by the water pump can directly pass through the inner cooling pipes of each cooling roller, effectively improving the cooling efficiency.

[0057] Combined with Figure 1 As shown, a maintenance fence 21 for inspecting and monitoring the working condition of the cooling unit is provided on the upper side of a rack 20, and a ladder 22 is provided along the maintenance fence 21. The maintenance personnel can climb the ladder 22 to reach the maintenance fence 21 above the rack 20, so as to conveniently look down and observe the working conditions of various mechanisms of the cooling unit.

[0058] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0059] It should be understood that the present invention uses the terms "first", "second", etc. to describe various information, but these information should not be limited to these terms, and these terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present invention, "first" information may also be referred to as "second" information, and similarly, "second" information may also be referred to as "first" information.

[0060] The above description does not limit the technical scope of the present invention in any way. Any modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A cooling unit for preparing a film, comprising a plurality of cooling rollers (10) arranged in parallel with each other, wherein a frame (20) is provided on the left and right sides of the cooling rollers (10), characterized in that: The cooling roller (10) comprises a roller body (11), and detachable end shafts (12) are installed at the left and right ends of the roller body (11). A cooling assembly (30) is arranged inside the roller body (11), and the cooling assembly (30) comprises an end plate (31), a guide positioning rod (32), an inner cooling pipe (33), and a tube-supporting transfer frame (34). One end of the inner cooling pipe (33) is U-shaped, and the guide positioning rod (32) is arranged at the U-shaped mouth of the inner cooling pipe (33) and is parallel to the inner cooling pipe (33). A plurality of tube-supporting transfer frames (34) are arranged at equal intervals along the guide positioning rod (32), and the inner cooling pipe (33) and the guide positioning rod (32) are fixedly mounted. On the supporting transfer frame (34), the other end of the inner cooling pipe (33) is provided with a water inlet (331) and a water outlet (332), the water inlet (331) and the water outlet (332) are respectively connected to the water inlet joint (311) and the water outlet joint (312) at the end plate (31), the end plate (31) is rotatably clamped between the limiting ring (35) and the end shaft (12), the limiting ring (35) is fixedly connected to the end shaft (12), cooling water flows in the inner cooling pipe (33), heat transfer oil is poured between the inner cooling pipe (33) and the inner wall of the roller body (11), and the inner cooling pipe (33) is immersed in the heat transfer oil; The supporting and moving frame (34) comprises a main frame (341), a middle installation position for clamping the guide positioning rod (32) is provided at the center of the main frame (341), support arms (342) are provided on the left and right sides of the middle installation position respectively, and a supporting and fixing mechanism (36) for clamping the water inlet pipe (333) and the water outlet pipe (334) of the inner cooling pipe (33) is provided on the upper side of the middle installation position of the main frame (341), and rugby-shaped rollers (343) are installed at the four corners of the main frame (341), the central axis of each roller (343) is equidistant from the central axis of the roller body (11), and the roller (343) is in rolling contact with the inner wall of the roller body (11).

2. The cooling unit according to claim 1, characterized in that: The hosting fixing mechanism (36) comprises a first tube clamping member (361), a second tube clamping member (362), a movable connecting member (363), and a locking rod (364); the first tube clamping member (361) and the second tube clamping member (362) are symmetrically arranged on the left and right sides of the main frame (341) and are both movably hinged to the main frame (341); the movable connecting member (363) is arranged between the first tube clamping member (361) and the second tube clamping member (362); a front convex shaft portion (3631) and a rear convex shaft portion (3632) are respectively arranged on the lower side of the movable connecting member (363); The front convex shaft portion (3631) is slidably connected to the first slotted hole portion (3611) of the first tube clamping member (361), and the rear convex shaft portion (3632) is slidably connected to the second slotted hole portion (3621) of the second tube clamping member (362). The upper side of the movable connecting member (363) is rotatably connected to the lower end of the locking rod (364), and the upper end of the locking rod (364) is threadedly connected to the welding nut (365) at the main frame (341). Rotating the locking rod (364) can drive the first tube clamping member (361) and the second tube clamping member (362) on both sides to be pressed down synchronously.

3. The cooling unit according to claim 2, characterized in that: The main frame (341) is provided with a first hinge axis (344) hinged to the first tube clamping member (361) and a second hinge axis (345) hinged to the second tube clamping member (362). The first hinge axis (344) and the second hinge axis (345) are located at the same height and are parallel to each other. An intermediate clamping rod (346) for clamping the guide positioning rod (32) is hingedly provided at the first hinge axis (344). The movable connecting member (363) is located between the intermediate clamping rod (346) and the first tube clamping member (361). The main frame (341) is provided with a clamping rod slot (3411) at the intermediate mounting position to match the intermediate clamping rod (346).

4. The cooling unit according to claim 3, characterized in that: An upper wheel component (348) and a lower wheel component (349) are provided in the clamp rod slot (3411); the central axes of the upper wheel component (348) and the lower wheel component (349) are parallel to the central axis of the guide positioning rod (32); and the middle clamp rod component (346) can be deflected downward to clamp the guide positioning rod (32) between the upper wheel component (348) and the lower wheel component (349).

5. The cooling unit according to claim 1, characterized in that: The limiting ring (35) is arranged at the inner end of the end plate (31), and the outer end of the end plate (31) is provided with a limiting bolt portion (313), the limiting bolt portion (313) is engaged with the rotation limiting mechanism (40), the limiting bolt portion (313) is arranged between the water inlet joint (311) and the water outlet joint (312), and the rotation limiting mechanism (40) includes a limiting lock component (41) and a fixed support (42), the upper end of the fixed support (42) is fixedly connected to the limiting lock component (41), and the lower end of the fixed support (42) is connected to the roller seat (50) of the cooling roller (10).

6. The cooling unit according to claim 5, characterized in that: A first pipe insertion opening (411) and a second pipe insertion opening (412) for inserting a water inlet pipe (61) and a water outlet pipe (62) are respectively provided on both sides of the limit lock clamp (41), and a limit clamping groove (413) is provided between the first pipe insertion opening (411) and the second pipe insertion opening (412), and the limit clamping groove (413) is clamped with the limit clamping bolt portion (313) of the end plate (31).

7. The cooling unit according to claim 1, characterized in that: A maintenance fence (21) for inspecting and monitoring the working condition of the cooling unit is provided on the upper side of the frame (20), and a ladder (22) is provided along the frame (20) along the maintenance fence (21).

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