A PET film rapid cooling device

Abstract

The present invention belongs to the technical field of PET film production equipment, and specifically is a PET film rapid cooling device, comprising a box body, wherein the interior of the box body is symmetrically rotatably connected to limit rollers, a water collecting trough is arranged between the plurality of limit rollers, the lower surface of the water collecting trough is fixedly connected to the inner lower surface of the box body, a water pump is fixedly connected to the outer side of the box body, the water inlet end of the water pump is fixedly connected to the interior of the water collecting trough, the drainage end of the water pump is fixedly connected to a connecting pipe, both ends of the connecting pipe are respectively fixedly connected to nozzles, a plurality of nozzle holes are arranged on the surfaces of the two nozzles, and a protrusion is arranged on one side of the nozzle hole. The device can transport coolant to each cooling area separately, and the coolant after heat exchange will not flow into the remaining cooling areas, thereby avoiding the problem of large temperature difference between the two ends of the roller surface caused by the gradual increase in temperature when the cooling water flows from one end to the other end.

Description

Technical Field

[0001] The invention belongs to the technical field of PET film production equipment, in particular to a PET film rapid cooling device. Background Art

[0002] PET film is a packaging film with comprehensive performance and wide application. After the PET film is extruded into film, if it is not cooled in time, the temperature and shape of the film may change, resulting in unstable film dimensions, thus affecting the quality of the product. Therefore, a cooling device is required to cool its surface temperature.

[0003] A patent application with publication number CN220313938U discloses a cooling mechanism for uniaxial stretching production of PET cast film, including a box body, wherein two cooling rollers are rotatably connected to the interior of the box body through bearings, both ends of the cooling rollers are sealed and rotatably connected to a shell, a storage box is provided at the bottom of the box body, the front of the storage box is connected to a first connecting pipe, and the other end of the first connecting pipe is connected to a water pump.

[0004] The above prior art coolant transports the coolant into the interior of the cooling roller, the cooling roller contacts the film and transfers the heat on the surface of the film to the surface of the cooling roller, and then the coolant contacts the interior of the cooling roller and performs heat exchange treatment on the cooling roller, so that the surface temperature of the cooling roller is reduced, thereby achieving cooling of the film.

[0005] When the above-mentioned prior art is in use, the coolant generally enters from the water inlet of the cooling roller and is discharged from the drain port of the cooling roller. The coolant flows in one direction. When the length of the cooling roller is long, when the cooling water flows from one end of the cooling roller to the other end, the heat exchange temperature will gradually increase, which will eventually cause a large temperature difference between the two ends of the roller surface.

[0006] To this end, the present invention provides a PET film rapid cooling device. Summary of the invention

[0007] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0008] The technical solution adopted by the present invention to solve its technical problem is: a PET film rapid cooling device described in the present invention comprises a box body, the interior of the box body is symmetrically rotatably connected with a limiting roller, a water collecting trough is arranged between the plurality of limiting rollers, the lower surface of the water collecting trough is fixedly connected to the inner lower surface of the box body, a water pump is fixedly connected to the outer side of the box body, the water inlet end of the water pump is fixedly connected to the inside of the water collecting trough, the drainage end of the water pump is fixedly connected to a connecting pipe, the two ends of the connecting pipe are respectively fixedly connected with a nozzle, and the surfaces of the two nozzles are provided with a plurality of A spray hole is provided, a protrusion is provided on one side of the spray hole, the protrusion is fixedly connected to the surface of the spray pipe, a cooling roller is provided on the outer side of the spray pipe, the two cooling rollers are rotatably connected to the inside of the box body, a plurality of baffles are fixedly connected to the inside of the cooling roller, a plurality of cooling areas are formed inside the cooling roller through the baffles, a plurality of water baffles are slidably connected to the inside of the cooling roller, and one side of the water baffle is in contact with the circumferential surface of the spray pipe, a second water inlet is provided on one side of the water baffle, and a plurality of drainage outlets are provided inside the water baffle.

[0009] Preferably, one end of the cooling roller is fixedly connected to a worm gear, the outer side of the box is fixedly connected to a motor, the output end of the motor is fixedly connected to a worm, and the worm and the worm gear are meshed with each other.

[0010] Preferably, a first water inlet is provided at one end of the nozzle, and one end of the first water inlet is fixedly connected to one end of the connecting pipe.

[0011] Preferably, a second spring telescopic rod is fixedly connected inside the cooling roller, and a movable end of the second spring telescopic rod is fixedly connected to the surface of the water baffle.

[0012] Preferably, one end of each cooling roller is fixedly connected to a pulley, and the two pulleys are connected via a belt drive.

[0013] Preferably, a convex plate is slidably connected inside the water baffle, an iron rod is fixedly connected to one end of the convex plate, and an electromagnet is fixedly connected inside the nozzle, and the electromagnet and one end of the iron rod are attracted to each other after power is turned on.

[0014] Preferably, the upper surface of the water baffle is fixedly connected to a fixing frame, the fixing frame is internally slidably connected to a limiting rod, a limiting hole is arranged inside the movable end of the second spring telescopic rod, the size of the limiting rod matches the size of the limiting hole, and the other end of the limiting rod fits the surface of the convex plate.

[0015] Preferably, a first spring telescopic rod is fixedly connected inside the water baffle, a movable end of the first spring telescopic rod is fixedly connected to an end of the convex plate away from the iron rod, and a first spring is fixedly connected between the surface of the limit rod and the surface of the water baffle.

[0016] Preferably, the surface of the iron rod is symmetrically fixedly connected to a limiting tube, the interior of the limiting tube is slidably connected to a limiting block, a second spring is fixedly connected between the lower surface of the limiting block and the surface of the iron rod, the interior of the water baffle is symmetrically fixedly connected to a positioning frame, and the size of the limiting block matches the internal size of the positioning frame.

[0017] Preferably, the limit block and the magnetized iron rod are attracted to each other, the cross-sectional shape of the limit block is set to a right-angle trapezoid, and one side of the positioning frame is inclined.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. A PET film rapid cooling device described in the present invention divides a cooling roller into multiple cooling areas through a baffle plate, and then transports the coolant inside the nozzle to between each water baffle plate in each cooling area through a spray hole. The water baffle plate rotates with the cooling roller and drives the coolant to rotate. The coolant performs heat exchange treatment on the cooling roller. When the water baffle plate rotates to the convex block, the water baffle plate is squeezed by the convex block, so that the water baffle plate slides toward the outer wall of the cooling roller and drives the drain port to extend to the outer wall of the cooling roller. Then the coolant enters the water baffle plate through the second water inlet, and finally the coolant is discharged to the water collecting tank through the drain port for subsequent recycling. The device can transport the coolant to each cooling area separately, and the coolant after heat exchange will not flow into the remaining cooling areas, thereby avoiding the problem of a large temperature difference between the two ends of the roller surface caused by the gradual increase in temperature when the cooling water flows from one end to the other end.

[0020] 2. The PET film rapid cooling device described in the present invention is provided with a convex plate and an iron rod. When the water baffle moves to the electromagnet, the electromagnet generates a magnetic force, and the iron rod is affected by the magnetic force and has a magnetic force on its surface. The iron rod will absorb the limit block on its surface and slide toward the iron rod surface, so that the limit block slides out of the positioning frame and releases the limit on the convex plate. Then the iron rod is absorbed by the magnetic force, so that the iron rod slides to one side of the electromagnet and drives the convex plate to slide synchronously. The convex plate releases the squeezing of the limit rod, so that the limit rod is separated from the limit hole, and then the second spring telescopic rod can follow The water baffle plate slides synchronously. When the water baffle plate is separated from the protrusion, the protrusion plate is reset. At the same time, the limit block enters the interior of the positioning frame and limits the protrusion. The limit rod enters the limit hole to limit the movable end of the second spring telescopic rod. This structure can limit the water baffle plate after it is separated from the protrusion and squeezed, thereby preventing the water baffle plate from being affected by collision, vibration or water flow pressure so that the water baffle plate slides inside the cooling roller, and the coolant is discharged from the water baffle plate, thereby causing the coolant to leak, resulting in uneven heat exchange on the surface of the cooling roller, and ultimately reducing the cooling effect on the film. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0023] Figure 2 It is a cross-sectional view of the internal structure of the present invention;

[0024] Figure 3 It is a schematic structural diagram of the cooling roller of the present invention;

[0025] Figure 4 It is a schematic diagram of the structure of the cooling roller and the nozzle of the present invention;

[0026] Figure 5 It is a schematic diagram of the structure of the nozzle, the water baffle and the cooling roller of the present invention;

[0027] Figure 6 It is a schematic diagram of the structure of the nozzle of the present invention;

[0028] Figure 7 It is a schematic structural diagram of the cooling roller and the water retaining plate of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the water retaining plate of the present invention;

[0030] Fig. 9 is a schematic structural diagram of a second spring telescopic rod of the present invention;

[0031] Fig.10 is a cross-sectional view of the internal structure of the water retaining plate of the present invention;

[0032] Fig.11 The present invention Fig.10 A partial enlarged view of middle A;

[0033] In the figure: 1. box body; 11. limiting roller; 12. water collecting tank; 13. water pump; 14. connecting pipe; 15. motor; 16. worm; 2. cooling roller; 21. pulley; 22. worm gear; 23. baffle; 3. nozzle; 31. electromagnet; 32. convex block; 33. spray hole; 34. first water inlet; 4. water baffle; 41. fixing frame; 42. limiting rod; 43. first spring; 44. convex plate; 45. first spring telescopic rod; 46. iron rod; 47. limiting pipe; 48. second spring; 49. limiting block; 410. positioning frame; 411. second water inlet; 412. drain outlet; 5. second spring telescopic rod; 51. limiting hole. DETAILED DESCRIPTION

[0034] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below in conjunction with specific implementation methods.

[0035] Embodiment 1: Figures 1 to 6 As shown, a PET film rapid cooling device described in an embodiment of the present invention includes a box body 1, wherein the interior of the box body 1 is symmetrically rotatably connected to a limiting roller 11, a water collecting trough 12 is arranged between the plurality of limiting rollers 11, the lower surface of the water collecting trough 12 is fixedly connected to the inner lower surface of the box body 1, a water pump 13 is fixedly connected to the outer side of the box body 1, the water inlet end of the water pump 13 is fixedly connected to the interior of the water collecting trough 12, the drainage end of the water pump 13 is fixedly connected to a connecting pipe 14, the two ends of the connecting pipe 14 are respectively fixedly connected to a nozzle 3, and the surfaces of the two nozzles 3 are provided with a plurality of spray holes 33, the spray holes A protrusion 32 is provided on one side of 33, and the protrusion 32 is fixedly connected to the surface of the nozzle 3. A cooling roller 2 is provided on the outer side of the nozzle 3, and the two cooling rollers 2 are rotatably connected to the inside of the box body 1. A plurality of baffles 23 are fixedly connected to the inside of the cooling roller 2, and a plurality of cooling areas are formed inside the cooling roller 2 through the baffles 23. A plurality of water baffles 4 are slidably connected to the inside of the cooling roller 2, and one side of the water baffle 4 is in contact with the circumferential surface of the nozzle 3. A second water inlet 411 is provided on one side of the water baffle 4, and a plurality of drainage outlets 412 are provided inside the water baffle 4.

[0036] like Figure 1 As shown, one end of the cooling roller 2 is fixedly connected to a worm gear 22, the outer side of the box body 1 is fixedly connected to a motor 15, the output end of the motor 15 is fixedly connected to a worm 16, and the worm 16 and the worm gear 22 are meshed with each other.

[0037] like Figure 6 As shown, a first water inlet 34 is provided at one end of the nozzle 3, and one end of the first water inlet 34 is fixedly connected to one end of the connecting pipe 14.

[0038] like Figure 5 As shown, a second spring telescopic rod 5 is fixedly connected inside the cooling roller 2 , and a movable end of the second spring telescopic rod 5 is fixedly connected to the surface of the water baffle 4 .

[0039] like Figure 1 As shown, one end of each cooling roller 2 is fixedly connected to a pulley 21, and the two pulleys 21 are connected via a belt transmission.

[0040] Specifically, the prior art generally cools the film by delivering cooling liquid into the interior of the cooling roller 2, the cooling roller 2 contacts the film and transfers the heat on the surface of the film to the surface of the cooling roller 2, and then the cooling liquid contacts the interior of the cooling roller 2 and performs heat exchange treatment on the cooling roller 2, so that the surface temperature of the cooling roller 2 is reduced, thereby achieving cooling of the film;

[0041] When the above-mentioned prior art is in use, the coolant generally enters from the water inlet of the cooling roller 2 and is discharged from the drain port 412 of the cooling roller 2. When the cooling roller 2 is long, when the cooling water flows from one end to the other end of the cooling roller 2, the heat exchange temperature will gradually increase, which will eventually cause a large temperature difference between the two ends of the roller surface.

[0042] In order to solve the above problems, the working principle of this embodiment is as follows: the film is positioned and conveyed through the limiting roller 11, the film is in contact with the surface of the cooling roller 2, the heat of the film is transferred to the surface of the cooling roller 2, and then the water pump 13 and the motor 15 are driven to work, the motor 15 drives the worm 16 to rotate, the worm 16 and the worm wheel 22 are meshed, so that the worm wheel 22 drives one of the cooling rollers 2 to rotate, and the cooling roller 2 rotates while driving the pulley 21 to rotate synchronously, and the pulley 21 on the surface of the other cooling roller 2 is driven by the belt, so that the two cooling rollers 2 can be driven. The cooling rollers 2 rotate synchronously, and the water pump 13 works at the same time. The water inlet end of the water pump 13 draws the coolant into the water pump 13, and then the coolant is discharged to the inside of the connecting pipe 14 through the discharge end of the water pump 13. The connecting pipe 14 sends the coolant to the inside of the two nozzles 3 through the first water inlet 34, and then the coolant is discharged through the spray hole 33 on the surface of the nozzle 3. The coolant enters the inside of the cooling roller 2. The inside of the cooling roller 2 is divided into multiple cooling areas by the baffle 23. Therefore, the coolant is sprayed into different cooling areas through the spray hole 33, and the multiple cooling areas are further divided into cooling areas by the water baffle 4. The cooling roller 2 is divided into a plurality of filling areas, and the coolant enters the filling area and fills the filling area with the coolant. Part of the coolant enters the interior of the water baffle 4 through the second water inlet 411, and the coolant contacts the inner wall of the cooling roller 2 and performs heat exchange operation with the cooling roller 2, so that the surface temperature of the cooling roller 2 drops, which can facilitate the subsequent contact with the film for heat exchange operation. When the cooling roller 2 drives the water baffle 4 to rotate to the convex block 32, the convex block 32 squeezes the water baffle 4, so that the water baffle 4 slides toward the outer wall of the cooling roller 2. At this time, the drainage port 412 at one end of the water baffle 4 slides from the inner wall of the cooling roller 2 and is exposed to the cooling roller 2. The cooling roller 2 is moved to the outside, and then the coolant in the filling area enters the water baffle 4 through the second water inlet 411, and is discharged to the water tank through the drain port 412 for recycling. When the water baffle 4 is away from the protrusion 32, the water baffle 4 is reset by the second spring telescopic rod 5, so that one end of the water baffle 4 is in contact with the outer wall of the cooling roller 2, and the other end of the water baffle 4 is in contact with the surface of the nozzle 3. When the water baffle 4 moves to the spray hole 33, the spray hole 33 sends the coolant into the filling area, and the operation is repeated to cool the cooling roller 2, and the cooling roller 2 cools the film.

[0043] In this embodiment, the coolant is separately delivered to each cooling area so that the temperature of the coolant contacting the inner wall of the cooling roller 2 is close, thereby cooling the cooling roller 2 evenly, and the coolant after heat exchange is discharged from the water baffle 4, so the coolant with a higher temperature will not flow into the remaining cooling areas, thereby avoiding the problem of a large temperature difference between the two ends of the roller surface caused by the gradual increase in temperature when the cooling water flows from one end to the other.

[0044] Embodiment 2: Figure 5 , Figures 7 to 11 As shown, compared with Example 1, another embodiment of the present invention is: the water baffle 4 is slidably connected to the inside with a convex plate 44, one end of the convex plate 44 is fixedly connected to an iron rod 46, and the inside of the nozzle 3 is fixedly connected to an electromagnet 31, and after power is turned on, the electromagnet 31 and one end of the iron rod 46 are attracted to each other.

[0045] like Fig. 9 and Fig.10 As shown, the upper surface of the water baffle 4 is fixedly connected to a fixing frame 41, the fixing frame 41 is internally slidably connected to a limiting rod 42, a limiting hole 51 is arranged inside the movable end of the second spring telescopic rod 5, the size of the limiting rod 42 matches the size of the limiting hole 51, and the other end of the limiting rod 42 fits with the surface of the convex plate 44.

[0046] like Fig.10 As shown, a first spring telescopic rod 45 is fixedly connected inside the water baffle 4, and the movable end of the first spring telescopic rod 45 is fixedly connected to the end of the convex plate 44 away from the iron rod 46, and a first spring 43 is fixedly connected between the surface of the limit rod 42 and the surface of the water baffle 4.

[0047] like Fig.11 As shown, the surface of the iron rod 46 is symmetrically fixedly connected to a limiting tube 47, the interior of the limiting tube 47 is slidably connected to a limiting block 49, a second spring 48 is fixedly connected between the lower surface of the limiting block 49 and the surface of the iron rod 46, and the interior of the water baffle 4 is symmetrically fixedly connected to a positioning frame 410, and the size of the limiting block 49 matches the internal size of the positioning frame 410.

[0048] like Fig.11 As shown, the limit block 49 and the magnetized iron rod 46 are attracted to each other, and the cross-sectional shape of the limit block 49 is set to a right-angle trapezoid, and one side of the positioning frame 410 is inclined.

[0049] Specifically, when the above-mentioned embodiment 1 is in operation, the water baffle 4 is movably connected through the first spring telescopic rod 45. When external vibration occurs or the impact force of the water flow is strong, the water baffle 4 may move inside the cooling roller 2, causing the coolant to leak from the inside of the water baffle 4, resulting in insufficient contact between the coolant and the cooling roller 2, thereby causing the cooling efficiency of the cooling roller 2 on the film to be reduced.

[0050] In order to solve the above problem, the present embodiment: turn on the electromagnet 31 to work, when the water baffle 4 rotates with the cooling roller 2 and rotates to the electromagnet 31, the electromagnet 31 generates magnetic force and absorbs the iron rod 46 inside the water baffle 4, the iron rod 46 is absorbed by the magnetic force and its surface generates magnetic force, the surface of the iron rod 46 is magnetized and absorbs the limit block 49 on its surface, so that the limit block 49 slides toward the surface of the iron rod 46 inside the limit tube 47 and squeezes the second spring 48, at this time the limit block 49 enters the inside of the limit tube 47 and detaches from the inside of the positioning frame 410, the limit on the iron rod 46 can be released, at this time the iron rod 46 can be absorbed by the electromagnet 31 and slide to one side of the electromagnet 31, the iron rod 46 then pulls the convex plate 44 to slide, and the convex plate 44 stretches the active end of the first spring telescopic rod 45 to move. After the convex plate 44 slides, the first spring 43 drives the limiting rod 42 to slide downward, and the limiting rod 42 disengages from the limiting hole 51, and one end of the limiting rod 42 fits with the surface of the convex plate 44. At this time, the convex block 32 contacts the water baffle plate 4, so that the water baffle plate 4 is squeezed by the convex block 32 and slides inside the cooling roller 2. The water baffle plate 4 drives the limiting rod 42 and the active end of the second spring telescopic rod 5 to move synchronously. At this time, the iron rod 46 disengages from the magnetic area of ​​the electromagnet 31, and the limiting rod 42 is on the lower surface of the fixed end of the second spring 48 rod, and the first spring telescopic rod 45 drives the convex plate 44 to reset , one end of the limiting rod 42 is limited by the fixed end surface of the second spring telescopic rod 5, so that one end of the limiting rod 42 cannot rise, so the limiting rod 42 will limit the convex plate 44, and the convex plate 44 cannot be reset, so that the convex plate 44 and the limiting rod 42 are in a relatively fixed state, and then the water baffle 4 is separated from the protrusion 32 and one end of the water baffle 4 is in contact with the surface of the nozzle 3, at this time, the limiting rod 42 slides out from under the second telescopic fixed end, the first spring telescopic rod 45 drives the convex plate 44 to reset, and the convex plate 44 squeezes one end of the limiting rod 42 to rise, and the limiting rod 42 stretches the first spring 43 and enters the limiting hole 51, and the movable end of the second spring telescopic rod 5 can be limited. When the surface of the iron rod 46 has no magnetic force, the second spring 48 drives the limit block 49 to reset. When the iron rod 46 resets, it drives the limit block 49 to slide synchronously. The upper surface of the limit block 49 contacts one side of the positioning frame 410, and as the limit block 49 slides, the limit block 49 is forced to slide downward and squeeze the second spring 48 into the interior of the limit tube 47. When the limit block 49 is directly below the positioning frame 410, the limit block 49 is reset by the second spring 48, and the second spring 48 drives the limit block 49 to enter the interior of the positioning frame 410. At this time, the limit block 49 can limit the iron rod 46, and then the convex plate 44 can be limited, so that the limiting operation of the water retaining plate 4 can be realized.

[0051] In this embodiment, a limiting operation is performed on the water baffle plate 4 at the position where the convex plate 44 is separated from the convex plate 4, so as to prevent the water baffle plate 4 from being affected by collision, vibration or water flow pressure so that the water baffle plate 4 slides inside the cooling roller 2, and the coolant is discharged from the water baffle plate 4, thereby causing coolant leakage, resulting in uneven heat exchange on the surface of the cooling roller 2, and ultimately reducing the cooling effect on the film.

[0052] Working principle: the film is positioned and transported by the limiting roller 11, the film contacts the surface of the cooling roller 2, the heat of the film is transferred to the surface of the cooling roller 2, and then the water pump 13 and the motor 15 are driven to work, the motor 15 drives the worm 16 to rotate, the worm 16 and the worm wheel 22 are meshed, so that the worm wheel 22 drives one of the cooling rollers 2 to rotate, and the cooling roller 2 rotates while driving the pulley 21 to rotate synchronously, and the pulley 21 on the surface of the other cooling roller 2 rotates synchronously through the transmission action of the belt, and then the two cooling rollers 2 can be driven to rotate synchronously, and the water pump 13 works at the same time, the water inlet end of the water pump 13 draws the coolant into the inside of the water pump 13, and then the coolant is discharged to the inside of the connecting pipe 14 through the discharge end of the water pump 13, and the connecting pipe 1 4 The coolant is sent to the inside of the two nozzles 3 through the first water inlet 34, and then the coolant is discharged through the spray hole 33 on the surface of the nozzle 3, and the coolant enters the inside of the cooling roller 2. The inside of the cooling roller 2 is divided into multiple cooling areas by the baffle 23, so the coolant is sprayed into different cooling areas through the spray hole 33, and the multiple cooling areas are further divided into multiple filling areas by the baffle 4. The coolant enters the filling area and fills the inside of the filling area with the coolant. Part of the coolant enters the inside of the baffle 4 through the second water inlet 411, and the coolant contacts the inner wall of the cooling roller 2 and performs heat exchange operation with the cooling roller 2, so that the surface temperature of the cooling roller 2 drops, which can facilitate the subsequent contact with the film for heat exchange operation;

[0053] Then, the electromagnet 31 is turned on to work. When the water baffle 4 rotates with the cooling roller 2 and rotates to the electromagnet 31, the electromagnet 31 generates magnetic force and attracts the iron rod 46 inside the water baffle 4. The iron rod 46 is attracted by the magnetic force and its surface generates magnetic force. After the surface of the iron rod 46 is magnetized, it attracts the limit block 49 on its surface, so that the limit block 49 slides toward the surface of the iron rod 46 inside the limit tube 47 and squeezes the second spring 48. At this time, the limit block 49 enters the interior of the limit tube 47 and detaches from the interior of the positioning frame 410, and the limit on the iron rod 46 can be released. At this time, the iron rod 46 can be attracted by the electromagnet 31 and slide to one side of the electromagnet 31, and the iron rod 46 immediately pulls the convex plate 44 to slide, and the convex plate 44 stretches the active end of the first spring telescopic rod 45 to move. After the convex plate 44 slides, the first spring 43 drives the limit rod 42 to slide downward, and the limit rod 42 detaches from the limit hole 51 and one end of the limit rod 42 fits with the surface of the convex plate 44.

[0054] Then the protrusion 32 contacts the water baffle 4, and the protrusion 32 squeezes the water baffle 4, so that the water baffle 4 slides toward the outer wall of the cooling roller 2. At this time, the drainage port 412 at one end of the water baffle 4 slides from the inner wall of the cooling roller 2 and is exposed to the outside of the cooling roller 2. Then, the coolant in the filling area enters the inside of the water baffle 4 through the second water inlet 411, and is then discharged to the water tank through the drainage port 412 for recycling.

[0055] The water baffle plate 4 is squeezed by the convex block 32 and slides inside the cooling roller 2, and the water baffle plate 4 drives the limiting rod 42 and the movable end of the second spring telescopic rod 5 to move synchronously. At this time, the iron rod 46 is separated from the magnetic area of ​​the electromagnet 31, and the limiting rod 42 is on the lower surface of the fixed end of the second spring 48 rod. The first spring telescopic rod 45 drives the convex plate 44 to reset, and one end of the limiting rod 42 is limited by the fixed end surface of the second spring telescopic rod 5, so that one end of the limiting rod 42 cannot rise, so the limiting rod 42 will limit the convex plate 44, and the convex plate 44 cannot be reset, so that the convex plate 44 and the limiting rod 42 are in a relatively fixed state;

[0056] When the water baffle plate 4 is separated from the protrusion 32 and one end of the water baffle plate 4 contacts the surface of the nozzle 3, the limiting rod 42 slides out from under the fixed end of the second telescopic rod, the first spring telescopic rod 45 drives the protrusion 44 to reset, the protrusion 44 squeezes one end of the limiting rod 42 to rise, the limiting rod 42 stretches the first spring 43 and enters the limiting hole 51, and the movable end of the second spring telescopic rod 5 can be limited. When the surface of the iron rod 46 has no magnetic force, the second spring 48 drives the limiting block 49 to reset, and the iron rod 46 drives the limiting block 49 to reset synchronously when resetting. Sliding, the upper surface of the limit block 49 contacts one side of the positioning frame 410, and as the limit block 49 slides, the limit block 49 is forced to slide downward and squeeze the second spring 48 into the interior of the limit tube 47. When the limit block 49 is directly below the positioning frame 410, the limit block 49 is reset by the second spring 48, and the second spring 48 drives the limit block 49 to enter the interior of the positioning frame 410. At this time, the limit block 49 can limit the iron rod 46, and then the convex plate 44 can be limited, so that the limit operation of the water retaining plate 4 can be realized;

[0057] After the water baffle plate 4 is reset by the second spring telescopic rod 5, one end of the water baffle plate 4 is in contact with the outer wall of the cooling roller 2, and the other end of the water baffle plate 4 is in contact with the surface of the nozzle 3. When the water baffle plate 4 moves to the spray hole 33, the spray hole 33 sends the coolant into the filling area, and the operation is repeated to cool the cooling roller 2, and the cooling roller 2 cools the film.

[0058] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A PET film rapid cooling device, characterized in that: The invention comprises a box body (1), wherein the box body (1) is internally symmetrically rotatably connected to a limiting roller (11), a water collecting trough (12) is arranged between the plurality of limiting rollers (11), the lower surface of the water collecting trough (12) is fixedly connected to the inner lower surface of the box body (1), the outer side of the box body (1) is fixedly connected to a water pump (13), the water inlet end of the water pump (13) is fixedly connected to the inside of the water collecting trough (12), the discharge end of the water pump (13) is fixedly connected to a connecting pipe (14), the two ends of the connecting pipe (14) are respectively fixedly connected to a nozzle (3), the surfaces of the two nozzles (3) are provided with a plurality of nozzle holes (33), and a protrusion (32) is arranged on one side of the nozzle hole (33). The protrusion (32) is fixedly connected to the surface of the nozzle (3), the outer side of each of the nozzles (3) is provided with a cooling roller (2), the two cooling rollers (2) are rotatably connected to the inside of the box (1), the inside of each of the cooling rollers (2) is fixedly connected with a plurality of baffles (23), the inside of each of the cooling rollers (2) forms a plurality of cooling areas through the baffles (23), the inside of each of the cooling rollers (2) is slidably connected with a plurality of water baffles (4), one side of each of the water baffles (4) is in contact with the circumferential surface of the nozzle (3), a second water inlet (411) is provided on one side of each of the water baffles (4), and a plurality of water outlets (412) are provided inside each of the water baffles (4); The water baffle (4) is slidably connected to a convex plate (44) at one end of which is fixedly connected to an iron rod (46); the nozzle (3) is fixedly connected to an electromagnet (31); and when energized, the electromagnet (31) and one end of the iron rod (46) are attracted to each other; The upper surface of the water baffle plate (4) is fixedly connected to a fixing frame (41), the fixing frame (41) is internally slidably connected to a limiting rod (42), the cooling roller (2) is internally fixedly connected to a second spring telescopic rod (5), the movable end of the second spring telescopic rod (5) is fixedly connected to the surface of the water baffle plate (4), a limiting hole (51) is provided inside the movable end of the second spring telescopic rod (5), the size of the limiting rod (42) matches the size of the limiting hole (51), and the other end of the limiting rod (42) is in contact with the surface of the convex plate (44); A first spring telescopic rod (45) is fixedly connected inside the water baffle (4); a movable end of the first spring telescopic rod (45) is fixedly connected to an end of the convex plate (44) away from the iron rod (46); a first spring (43) is fixedly connected between the surface of the limit rod (42) and the surface of the water baffle (4); The surface of the iron rod (46) is symmetrically fixedly connected to a limit tube (47), the interior of the limit tube (47) is slidably connected to a limit block (49), a second spring (48) is fixedly connected between the lower surface of the limit block (49) and the surface of the iron rod (46), the interior of the water retaining plate (4) is symmetrically fixedly connected to a positioning frame (410), and the size of the limit block (49) matches the internal size of the positioning frame (410); The limit block (49) and the magnetized iron rod (46) are attracted to each other, and the cross-sectional shape of the limit block (49) is set to be a right-angled trapezoid, and one side of the positioning frame (410) is set to be inclined.

2. A PET film rapid cooling device according to claim 1, characterized in that: One end of the cooling roller (2) is fixedly connected to a worm gear (22), the outer side of the box body (1) is fixedly connected to a motor (15), the output end of the motor (15) is fixedly connected to a worm (16), and the worm (16) and the worm gear (22) are meshed with each other.

3. A PET film rapid cooling device according to claim 2, characterized in that: A first water inlet (34) is provided at one end of the spray pipe (3), and one end of the first water inlet (34) is fixedly connected to one end of the connecting pipe (14).

4. A PET film rapid cooling device according to claim 1, characterized in that: One end of each cooling roller (2) is fixedly connected to a pulley (21), and the two pulleys (21) are connected via a belt drive.

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