Sectional type temperature difference cooling equipment for PVC film production

Abstract

The invention relates to the technical field of PVC film production cooling, in particular to sectional type temperature difference cooling equipment for PVC film production. The sectional type temperature difference cooling equipment for PVC film production comprises a support, rotating frames, middle rollers, side rollers, a cooling box, a spraying pipe, a conveying assembly and a rotating assembly, the upper side of the support is symmetrically and rotationally connected with the rotating frames, the middle rollers are symmetrically and rotationally connected between the two rotating frames on the front side and the rear side, and the side rollers are symmetrically and rotationally connected with the cooling box. The lower left side and the upper right side of the support are rotationally connected with side rollers correspondingly. According to the device, a film is cooled in various modes, for example, a spraying pipe cools the interiors of a middle roller and a side roller, and heat is taken away in cooperation with friction rotation between the film and the rollers; soaking type cooling of a cold water barrel; by means of secondary cooling of the water mist spray pipe, air cooling of the air cooling fan and the like, efficient and multi-stage cooling of the PVC film is achieved, and the cooling effect and the production quality of the film are effectively improved.

Description

Technical Field

[0001] The present invention relates to the technical field of PVC film production cooling, and particularly relates to a segmented temperature difference cooling device for PVC film production. Background Art

[0002] In the production process of PVC films, the cooling link has a crucial impact on product quality and production efficiency. With the continuous expansion of the application scope of PVC films, the market's requirements for their quality and production efficiency are increasing day by day. However, traditional PVC film cooling methods have shown some deficiencies in practical applications, restricting the final quality of the products and the overall efficiency of production.

[0003] Currently, most cooling devices adopt a single cooling method, such as relying solely on air cooling or a simple water cooling system. Although air cooling is easy to operate, due to the relatively low specific heat capacity of air, the cooling speed is relatively slow, making it difficult to meet the requirements of large-scale and high-efficiency production. On the other hand, although water cooling can provide a more efficient cooling effect, without precise control, it is prone to the problem of uneven cooling. This local temperature difference may cause an uneven stress distribution inside the film, resulting in defects such as wrinkles and deformations on the film surface, seriously affecting the flatness and dimensional stability of the film and reducing the quality of the final product. Summary of the Invention

[0004] In order to overcome the above-mentioned drawbacks, the present invention provides a segmented temperature difference cooling device for PVC film production.

[0005] The technical implementation solution of the present invention is as follows: A segmented temperature difference cooling device for PVC film production includes a support, a rotating frame, a middle roller, side rollers, a cooling box, a spray pipe, a conveying component, and a rotating component. The upper side of the support is symmetrically and rotatably connected with the rotating frame. A middle roller is symmetrically and rotatably connected between the two rotating frames on the front and rear sides. The left side of the lower part of the support and the right side of the upper part are respectively rotatably connected with side rollers. The side rollers and the corresponding middle rollers are symmetrically distributed up and down. A cooling box is installed on the right side of the lower part of the support. Spray pipes are rotatably connected inside both the middle roller and the side rollers. A conveying component is provided on the cooling box, and a rotating component is provided on the support.

[0006] More preferably, the conveying assembly includes a transmission pipe, a return pipe, a peristaltic pump assembly, a hose, an output pipe, a folded pipe, a water inlet pipe and a thermostat. A transmission pipe is connected and communicated between the front ends of the four spray pipes. A return pipe is installed between the front ends of the lower parts of the middle roller and the side roller. The return pipe is connected to the middle roller and the side roller by a rotary joint. Both the transmission pipe and the return pipe are provided with telescopic folding parts. A peristaltic pump assembly is installed on the left side of the cooling box. A hose is fixed in the pump housing of the peristaltic pump assembly. The roller structure of the peristaltic pump assembly is in close contact with the hose. The front end of the hose is connected to the transmission pipe. A folded pipe is connected inside the cooling box. The upper end of the folded pipe penetrates out of the left side of the cooling box and is provided with a thermostat. The thermostat is of a three-way valve structure. An output pipe is connected to the left valve. The front end of the output pipe is connected to the rear end of the hose. The lower end of the return pipe is connected to the front valve of the thermostat. The lower end of the folded pipe also penetrates out of the cooling box and is connected and communicated with the pipeline of the output pipe. The front side of the top of the folded pipe is communicated with a water inlet pipe. The water inlet pipe penetrates out of the top of the cooling box.

[0007] More preferably, the cooling box further includes a cooling fan, an air outlet hood and heat dissipation fins. A cooling fan is installed on the left side inside the cooling box. The right side of the cooling box is communicated with an air outlet hood. A large-area heat dissipation fin is installed in the middle of the cooling box. The folded pipe is closely wound around the heat dissipation fins.

[0008] More preferably, the rotating assembly includes a cylinder, a transmission frame and a pushing member. A cylinder is installed on the rear side of the upper part of the bracket. A pushing member is connected to the cylinder telescopic rod. A transmission frame is connected to the rear rotating frame. The pushing member is slidably connected to the transmission frame.

[0009] More preferably, it further includes a return frame, an air-cooling fan, a diversion block, an air filter and a connecting frame. A connecting frame is connected to the right side of the bracket. A return frame is installed on the right side of the connecting frame. An air-cooling fan is installed in the middle of the top of the return frame. A plurality of air outlets are opened on the upper and lower sides inside the return frame. Diversion blocks are connected to the middle parts of the upper and lower chambers inside the return frame. An air filter is installed in the middle of the bottom of the return frame.

[0010] More preferably, it further includes a chassis, a cold water bucket, a roller, a sponge roller and a hot air pipe. A chassis is connected to the left side of the bracket. A cold water bucket is installed on the chassis. A roller is rotatably connected to the middle part inside the cold water bucket. Sponge rollers are symmetrically rotatably connected to the upper and lower sides of the left side of the top of the cold water bucket. Hot air pipes are connected and communicated between the front ends and the rear ends of the two sponge rollers. The hot air pipes are limited on the bracket through connecting rings. The hot air pipes and the sponge rollers are rotationally connected by rotary sealing joints. The right ends of the two hot air pipes are communicated with the air outlet hood.

[0011] More preferably, it further includes a water baffle frame, water mist nozzles, external connecting pipes, a wind wheel, a turntable, a sliding frame, a moving frame and a swinging frame. A water baffle frame is connected to the position on the left side of the loop-shaped frame on the connecting frame. Three water mist nozzles are rotatably connected at intervals on the top of the water baffle frame. External connecting pipes are symmetrically connected to the top of the water baffle frame. The external connecting pipes are provided with three shunt pipes. Each shunt pipe is rotatably connected to the corresponding water mist nozzle through a rotary sealing joint. Wind wheels are rotatably connected to the right side inside the hot air pipes. Turntables are connected to the inner sides of the wind wheels. Sliding frames are symmetrically slidably connected to the front and back of the left side of the water baffle frame. A protrusion is provided at the upper end of the turntable, and the protrusion is embedded in the horizontal chute at the lower end of the sliding frame to achieve horizontal sliding connection. Moving frames are symmetrically slidably connected to the front and back of the upper side of the water baffle frame in the left-right direction. The moving frames are obliquely slidably connected to the corresponding sliding frames. Swing frames are sleeved on the front and rear ends of the water mist nozzles, and the upper ends of the swing frames are rotatably connected to the corresponding moving frames.

[0012] More preferably, it further includes guide wheels. Guide wheels are symmetrically connected to the upper right side of the upper part of the connecting frame, and guide wheels are also symmetrically connected to the upper right side of the upper part of the chassis.

[0013] Compared with the prior art, the present invention has the following advantages: 1. The device cools the film in various ways, such as the spray pipes cooling the inside of the middle roller and the side rollers, and the heat generated by the friction rotation between the film and the rollers is taken away; the immersion cooling of the cold water bucket; the secondary cooling of the water mist nozzles; and the air cooling of the air cooling fans, etc., realizing the efficient and multi-stage cooling of the PVC film, effectively improving the cooling effect and production quality of the film.

[0014] 2. The conveying component and the thermostat work together to automatically adjust the circulation path according to the temperature of the coolant. The high-temperature coolant flows back to the folded pipe for cooling, and the low-temperature coolant continues to be recycled, realizing the efficient recycling of the coolant, reducing the production cost, and at the same time ensuring that the coolant is always in the best working state and improving the stability of the cooling effect.

[0015] 3. The sponge roller can wipe the moisture on the surface of the film, and the hot air in the hot air pipe accelerates the evaporation of the moisture on the surface of the film through the sponge roller, improving the drying speed of the film, ensuring that the surface of the film is dry before entering the winding component, which is beneficial to subsequent collection and storage, and improving the product quality.

[0016] 4. The hot air in the hot air pipe drives the wind wheel to rotate, and then drives the turntable, the sliding frame, the moving frame and the swinging frame to move, so that the water mist nozzles swing left and right, improving the uniformity of the water mist sprayed on the surface of the film and enhancing the effect of the secondary cooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional structural schematic diagram of the present invention.

[0018] Figure 2This is a three-dimensional structural schematic diagram of components such as the rotating frame, middle roller, and side roller of the present invention.

[0019] Figure 3 This is a three-dimensional structural schematic diagram of components such as the transfer pipe, return pipe, and peristaltic pump assembly of the present invention.

[0020] Figure 4 This is a three-dimensional structural schematic diagram of components such as the spray pipe, middle roller, and side roller of the present invention.

[0021] Figure 5 This is an exploded view of components such as the transfer pipe, return pipe, and folded pipe of the present invention.

[0022] Figure 6 This is a three-dimensional structural schematic diagram of components such as the cooling fan, air outlet hood, and heat sink of the present invention.

[0023] Figure 7 This is a three-dimensional structural schematic diagram of components such as the folded pipe, output pipe, and thermostat of the present invention.

[0024] Figure 8 This is a three-dimensional structural schematic diagram of components such as the guide wheel, bracket, and cylinder of the present invention.

[0025] Figure 9 This is a three-dimensional structural schematic diagram of components such as the cylinder, transmission frame, and pushing member of the present invention.

[0026] Figure 10 This is a three-dimensional structural schematic diagram of components such as the return frame, air-cooled fan, and flow guiding block of the present invention.

[0027] Figure 11 This is a planar structural schematic diagram of components such as the air-cooled fan, flow guiding block, and air filter of the present invention.

[0028] Figure 12 This is a three-dimensional structural schematic diagram of components such as the chassis, cold water bucket, and drum of the present invention.

[0029] Figure 13 This is a three-dimensional structural schematic diagram of components such as the sponge roller, hot air pipe, and air outlet hood of the present invention.

[0030] Figure 14 This is a three-dimensional structural schematic diagram of components such as the water blocking frame, water mist spray pipe, and external connection pipe of the present invention.

[0031] Figure 15 This is a three-dimensional structural schematic diagram of components such as the wind wheel, turntable, and sliding frame of the present invention.

[0032] Figure 16 This is a three-dimensional structural schematic diagram of components such as the sliding frame, moving frame, and swinging frame of the present invention.

[0033] Figure 17This is a three-dimensional structural schematic diagram of components such as the water mist spray pipe, mobile rack, and swing rack of the present invention.

[0034] The markings of each component in the attached drawings are as follows: 1. Support, 101. Rotating frame, 102. Middle roller, 103. Side roller, 104. Cooling box, 1041. Heat dissipation fan, 1042. Air outlet hood, 105. Spray pipe, 106. Cylinder, 107. Transmission frame, 108. Pushing member, 201. Transmission pipe, 202. Return pipe, 203. Peristaltic pump assembly, 204. Hose, 205. Output pipe, 206. Folded pipe, 1061. Heat sink, 207. Water inlet pipe, 208. Thermostat, 301. Return frame, 302. Air-cooled fan, 303. Flow guiding block, 304. Air filter, 305. Connecting frame, 401. Bottom frame, 402. Cold water bucket, 403. Drum, 501. Sponge roller, 502. Hot air pipe, 601. Water retaining frame, 602. Water mist spray pipe, 603. Outer connecting pipe, 701. Wind wheel, 702. Turntable, 703. Sliding frame, 704. Mobile rack, 705. Swing rack, 8. Guide wheel. Specific embodiments

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the attached drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0036] Embodiment 1: A segmented temperature difference cooling device for PVC film production, as Figures 1-9 shown, includes a support 1, a rotating frame 101, a middle roller 102, a side roller 103, a cooling box 104, a spray pipe 105, a conveying assembly, and a rotating assembly. The upper side of the support 1 is symmetrically and rotatably connected with a rotating frame 101 front and back. A middle roller 102 is symmetrically and rotatably connected between the two rotating frames 101 on the front and back sides left and right. The lower left side and the upper right side of the support 1 are respectively rotatably connected with a side roller 103. The side roller 103 and the corresponding middle roller 102 are symmetrically distributed up and down, and the two cooperate to achieve precise limiting of the film. The lower right side of the support 1 is installed with a cooling box 104 by bolts. The inside of the middle roller 102 and the side roller 103 are both rotatably connected with a spray pipe 105. The cooling box 104 is provided with a conveying assembly for conveying the coolant to the spray pipe 105 to achieve heat exchange of the middle roller 102 and the side roller 103. The support 1 is provided with a rotating assembly.

[0037] As Figure 3 and Figures 5-7As shown in the figure, the conveying assembly includes a transfer pipe 201, a return pipe 202, a peristaltic pump assembly 203, a hose 204, an output pipe 205, a folded pipe 206, a water inlet pipe 207, and a thermostat 208. A transfer pipe 201 is connected and communicated between the front ends of four spray pipes 105. A return pipe 202 is installed between the lower front ends of the middle roller 102 and the side roller 103. The return pipe 202 is connected to the middle roller 102 and the side roller 103 by a rotary joint to achieve rotational connection and internal intercommunication, ensuring the normal flow of the coolant during the rotation of the middle roller 102 and the side roller 103. Both the transfer pipe 201 and the return pipe 202 are provided with telescopic folding parts. When the rotating frame 101 drives the middle roller 102 to rotate and adjust, the folding parts can effectively prevent the transfer pipe 201 and the return pipe 202 from being damaged due to the influence of rotation, ensuring the continuity of coolant transportation and return. A peristaltic pump assembly 203 is installed on the left side of the cooling tank 104. The peristaltic pump assembly 203 is a pump that uses rollers to alternately compress and relax a flexible pipe to transport fluid. A hose 204 is fixed in the pump housing of the peristaltic pump assembly 203. The roller structure of the peristaltic pump assembly 203 is in close contact with the hose 204. By regularly and alternately squeezing the hose 204 with the rollers, a stable propulsion force can be generated to push the internal fluid forward, realizing the efficient transportation of liquid. The front end of the hose 204 is connected to the transfer pipe 201. A folded pipe 206 is connected inside the cooling tank 104. The upper end of the folded pipe 206 penetrates out of the left side of the cooling tank 104 and is installed with a thermostat 208. The thermostat 208 is a three-way valve structure. The left valve is connected to an output pipe 205. The front end of the output pipe 205 is connected to the rear end of the hose 204. The lower end of the return pipe 202 is connected to the front valve of the thermostat 208. The lower end of the folded pipe 206 also penetrates out of the cooling tank 104 and is connected and communicated with the pipeline of the output pipe 205. The front side of the top of the folded pipe 206 is communicated with a water inlet pipe 207. The water inlet pipe 207 penetrates out of the top of the cooling tank 104, facilitating the accurate injection of coolant into the folded pipe 206.

[0038] As Figure 6 shown, the cooling tank 104 further includes a cooling fan 1041, an air outlet hood 1042, and heat sinks 1061. A cooling fan 1041 is installed on the left side inside the cooling tank 104 by bolts. The right side of the cooling tank 104 is communicated with an air outlet hood 1042. A large-area heat sink 1061 is installed in the middle of the cooling tank 104. The folded pipe 206 is closely wound around the heat sinks 1061. Through the efficient heat conduction of the heat sinks 1061, the coolant in the folded pipe 206 can be quickly cooled. The operation of the cooling fan 1041 can accelerate the air flow inside the cooling tank 104, further improving the cooling effect on the folded pipe 206 and ensuring that the coolant is always in a low-temperature state to meet the cooling requirements.

[0039] As Figures 8-9As shown in the figure, the rotating assembly includes a cylinder 106, a transmission frame 107 and a pushing member 108. The cylinder 106 is installed on the rear side of the upper part of the bracket 1 by bolts. A pushing member 108 is connected to the telescopic rod of the cylinder 106. A transmission frame 107 is connected to the rear rotating frame 101. The pushing member 108 is slidably connected to the transmission frame 107.

[0040] After the film is produced, it needs to be cooled and then collected. First, start the cylinder 106. The telescopic rod of the cylinder 106 extends, driving the pushing member 108 to move upward. The pushing member 108 pushes the transmission frame 107 to rotate around its rotation center. The transmission frame 107 drives the rear rotating frame 101 to rotate synchronously, and then drives the middle rollers 102 on both sides and the front rotating frame 101 to rotate together. By the rotation of the middle rollers 102, a suitable distance can be opened between the middle rollers 102 and the side rollers 103. At this time, the film is conveyed into the bracket 1 by the production equipment, continues to move leftward through the gap between the middle rollers 102 and the side rollers 103 and is connected to the winding equipment. Then, control the cylinder 106 to operate in the reverse direction. The telescopic rod of the cylinder 106 shortens, driving the pushing member 108 to move downward, so as to drive the transmission frame 107 to rotate in the reverse direction, and then drive the rotating frame 101 and the middle rollers 102 to rotate in the reverse direction. The middle rollers 102 cooperate with the side rollers 103 to press the film tightly. The film is made into an arc shape, increasing the contact area between the film and the middle rollers 102 and the side rollers 103, thereby increasing the friction force and ensuring the stability of the film during transportation. Then, inject the coolant into the folded tube 206 at an accurate flow rate through the water inlet pipe 207. Start the peristaltic pump assembly 203. The rollers on the peristaltic pump assembly 203 rotate at a set speed, and then sequentially compress the hose 204 to generate a stable propulsion force to pump the coolant in the folded tube 206, so that the coolant flows into the hose 204. And the low-temperature coolant in the folded tube 206 will flow through the left valve port of the thermostat 208 and into the output pipe 205, and synchronously flow into the hose 204. Then, driven by the peristaltic pump assembly 203, the coolant is transported into the transmission pipe 201. Finally, the coolant enters the spray pipe 105 through the transmission pipe 201. The spray pipe 105 sprays the coolant on the inner walls of the middle rollers 102 and the side rollers 103 in a uniform spraying mode to efficiently cool the two. When the film is conveyed by the middle rollers 102 and the side rollers 103, the middle rollers 102 and the side rollers 103 rotate due to the friction with the film, which can take away the heat on the film surface to realize the heat exchange of the film. The coolant absorbs these heats. The excess coolant in the middle rollers 102 and the side rollers 103 will enter the return pipe 202 and flow back to the thermostat 208 through the return pipe 202.The thermostat 208 adopts a high-precision wax structure. When the coolant flowing back through the return pipe 202 is in a high-temperature state, the paraffin wax expands due to heat, opening the channel between the return pipe 202 and the folded pipe 206, while closing the channel between the return pipe 202 and the output pipe 205. The used coolant then flows back into the folded pipe 206. The heat sink 1061 can utilize its efficient heat dissipation performance to cool the coolant in the folded pipe 206, keeping the coolant in a low-temperature state. At the same time, the cooling fan 1041 is turned on to accelerate the air flow inside the cooling box 104, further cooling the folded pipe 206. If the coolant flowing back through the return pipe 202 is in a low-temperature state, then the paraffin wax contracts, closing the channel between the return pipe 202 and the folded pipe 206, while opening the channel between the return pipe 202 and the output pipe 205, allowing the liquid in the return pipe 202 to enter the output pipe 205 and continue to be circulated through the hose 204 and the transfer pipe 201. Thus, the intelligent recycling of the coolant is achieved, and the coolant always reaches the best working state, meeting the requirements of film cooling under different working conditions.

[0041] Embodiment 2: On the basis of Embodiment 1, as Figure 1 and Figures 10-11 shown, it further includes a return frame 301, an air-cooling fan 302, a flow guide block 303, an air filter 304, and a connecting frame 305. The connecting frame 305 is welded to the right side of the bracket 1, and the return frame 301 is installed on the right side of the connecting frame 305. The air-cooling fan 302 is installed in the middle of the top of the return frame 301 through bolts. A plurality of air outlets are opened in the upper and lower sides of the return frame 301. Flow guide blocks 303 are connected to the middle parts of the upper and lower chambers inside the return frame 301. The flow guide blocks 303 are designed in a streamline shape, and the flow guide blocks 303 on the upper and lower sides are distributed oppositely, which can effectively guide the air entering the return frame 301 to both sides, making the air evenly distributed inside the return frame 301 and avoiding the situation of uneven local air flow. The air filter 304 is installed in the middle of the bottom of the return frame 301 through bolts. During the air-cooling process of the film, part of the returned air will be discharged after being filtered by the air filter 304.

[0042] The processed film first enters the loop frame 301 at the initial stage for air-cooling pretreatment, and then continues to be conveyed into the bracket 1 for subsequent cooling and collection operations. After the air-cooling fan 302 is started, the air-cooling fan 302 rotates at a high speed, generating a strong suction force to quickly pump the external air into the loop frame 301. During the flow of air in the loop frame 301, under the guiding action of the upper and lower side guide blocks 303, it is evenly guided to the front and back sides, so as to be evenly discharged from the air outlet to the upper and lower surfaces of the film, realizing efficient air-cooling and temperature reduction of the film. During the air-cooling process of the film, since the film may release some harmful gases, these harmful gases may enter the loop frame 301 along with the air flow. The air filter 304 can effectively filter and purify these harmful gases to ensure that the discharged air meets the environmental protection standards and reduces the harm to the working environment and operators.

[0043] As Figure 1 and Figures 12-13 shown, it also includes a chassis 401, a cold water bucket 402, a roller 403, a sponge roller 501 and a hot air pipe 502. The chassis 401 is welded to the left side of the bracket 1. A cold water bucket 402 for storing cold water is installed on the chassis 401. A roller 403 is rotatably connected to the middle of the cold water bucket 402. The surface of the roller 403 is smooth-treated to reduce the friction with the film and ensure that the film can pass smoothly. Sponge rollers 501 are rotatably connected symmetrically up and down on the left side of the top of the cold water bucket 402. Hot air pipes 502 are connected and communicated between the front ends and the rear ends of the two sponge rollers 501. The hot air pipes 502 are limited on the bracket 1 through connecting rings to provide additional support. The hot air pipes 502 and the sponge rollers 501 are rotationally connected by rotary seal joints, so that when the sponge rollers 501 rotate, it will not affect the stability of the hot air pipes 502 and ensure the normal delivery of hot air. The right ends of the two hot air pipes 502 communicate with the air outlet cover 1042 to ensure that the hot air can smoothly flow from the air outlet cover 1042 into the hot air pipes 502.

[0044] Before the device runs, inject an appropriate amount of cold water into the cold water bucket 402. After the film is cooled by the middle roller 102 and the side roller 103, it will be conveyed to the left. First, it bypasses below the roller 403. The roller 403 rotates freely driven by the film, guiding the film to smoothly enter the cold water bucket 402. After the film enters the cold water bucket 402, it is completely immersed in the internal cold water. Through the heat exchange between the cold water and the film, the film is further cooled to improve the cooling effect. Then, the film passes through between the two sponge rollers 501. Driven by the film, the sponge rollers 501 rotate due to friction. The sponge material on the surface of the sponge rollers 501 has good water absorption and can effectively wipe the water attached to the film surface. At the same time, during the operation of the internal components of the cooling box 104, the hot air generated when cooling the coolant will flow towards the air outlet hood 1042. Since the hot air pipe 502 is communicated with the air outlet hood 1042, the hot air will be guided into the hot air pipe 502 and flow to the inside of the sponge rollers 501. When the film is conveyed through the sponge rollers 501, the heat of the hot air will be transferred to the sponge rollers 501, accelerating the evaporation of the water in the sponge rollers 501. This way of hot air-assisted evaporation can significantly increase the drying speed of the water on the film surface, ensuring that the film surface is dry before entering the winding assembly, which is beneficial for subsequent collection and storage.

[0045] As Figure 1 and Figures 14-17 shown, it further includes a water retaining frame 601, a water mist spray pipe 602, an external connecting pipe 603, a wind wheel 701, a turntable 702, a sliding frame 703, a moving frame 704 and a swinging frame 705. A water retaining frame 601 is connected to the position on the left side of the loop frame 301 on the connecting frame 305. Three water mist spray pipes 602 are rotatably connected at intervals on the top of the water retaining frame 601. A drain pipe is provided at the bottom of the water retaining frame 601. The excess clear water in the water retaining frame 601 will be discharged through the drain pipe. The external connecting pipes 603 are symmetrically connected to the front and back of the top of the water retaining frame 601. The external connecting pipe 603 has three shunt pipes, and each shunt pipe is rotatably connected to the corresponding water mist spray pipe 602 through a rotary seal joint, which not only ensures the water path connection but also can adapt to the rotation of the spray pipe. Wind wheels 701 are rotatably connected to the right sides inside the hot air pipes 502. Turntables 702 are welded to the inner sides of the wind wheels 701. Sliding frames 703 are symmetrically slidably connected to the front and back of the left side of the water retaining frame 601. A protrusion is provided at the upper end of the turntable 702, and this protrusion is embedded in the horizontal chute at the lower end of the sliding frame 703 to achieve horizontal sliding connection. Moving frames 704 are symmetrically slidably connected to the front and back of the upper side of the water retaining frame 601 in the left-right direction. The moving frames 704 are obliquely slidably connected to the corresponding sliding frames 703. Swing frames 705 are sleeved on the front and rear ends of the water mist spray pipes 602, and the upper ends of the swing frames 705 are rotatably connected to the corresponding moving frames 704.

[0046] Connect the external water pipe to the external connection pipe 603. After turning on the water source, the clear water enters the water mist spray pipe 602 through the shunt pipe of the external connection pipe 603 and sprays downward. When the film is air-cooled by the air-cooling fan 302, it continues to be conveyed to the left from below the water mist spray pipe 602 for subsequent cooling and winding operations. At this time, the water mist spray pipe 602 evenly sprays the water mist on the surface of the film to achieve secondary cooling of the film. At the same time, the flow of hot air in the hot air pipe 502 will generate a certain thrust to drive the wind wheel 701 to rotate. The rotation of the wind wheel 701 drives the connected turntable 702 to rotate. The protrusions on the turntable 702 slide in the horizontal chute at the lower end of the sliding frame 703, thereby driving the sliding frame 703 to slide up and down repeatedly along the track on the left side of the water retaining frame 601. The up and down sliding of the sliding frame 703 drives the moving frame 704 to move reciprocally in the left and right directions. The left and right movement of the moving frame 704 drives the water mist spray pipe 602 to swing in the left and right directions through the swing frame 705, greatly improving the uniformity of the water mist spraying on the surface of the film and further enhancing the effect of secondary cooling.

[0047] As Figure 1 and Figure 8 shown, it further includes guide wheels 8. Guide wheels 8 are symmetrically connected up and down on the upper right side of the connecting frame 305, and guide wheels 8 are also symmetrically connected up and down on the upper right side of the bottom frame 401. When the film initially enters the device, it will first pass through the two guide wheels 8 on the connecting frame 305. After air-cooling and water mist cooling, it continues to be conveyed to the left and will pass through the two guide wheels 8 on the bottom frame 401. These guide wheels 8 can provide a stable limiting effect on the film, keeping the film neat during the conveying process, avoiding wrinkles or offsets, and ensuring the stability and quality of the film during the entire cooling and winding process.

[0048] The above are only the embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structure or equivalent process transformation made by using the content of the specification of the present invention, or directly or indirectly applied in other related technical fields, shall be similarly included in the patent protection scope of the present invention.

Claims

1. A segmented temperature difference cooling device for PVC film production, characterized in that: It includes a bracket (1), a rotating frame (101), a middle roller (102), side rollers (103), a cooling box (104), a spray pipe (105), a conveying assembly and a rotating assembly. On the upper side of the bracket (1), the rotating frames (101) are symmetrically and rotatably connected. Between the two rotating frames (101) on the front and rear sides, the middle roller (102) is symmetrically and rotatably connected. On the lower left side and the upper right side of the bracket (1), the side rollers (103) are respectively rotatably connected. The side rollers (103) and the corresponding middle roller (102) are symmetrically distributed up and down. On the lower right side of the bracket (1), the cooling box (104) is installed. Inside the middle roller (102) and the side rollers (103), the spray pipes (105) are rotatably connected. On the cooling box (104), a conveying assembly is provided. On the bracket (1), a rotating assembly is provided.

2. The segmented temperature difference cooling equipment for PVC film production according to claim 1, characterized in that: The conveying assembly includes a transmission pipe (201), a return pipe (202), a peristaltic pump assembly (203), a hose (204), an output pipe (205), a folded pipe (206), a water inlet pipe (207) and a thermostat (208). Between the front ends of the four spray pipes (105), the transmission pipe (201) is connected and communicated. Between the lower front ends of the middle roller (102) and the side rollers (103), the return pipe (202) is installed. Between the return pipe (202) and the middle roller (102), the side rollers (103), rotary joints are used for connection. Both the transmission pipe (201) and the return pipe (202) are provided with telescopic folding parts. On the left side of the cooling box (104), the peristaltic pump assembly (203) is installed. In the pump housing of the peristaltic pump assembly (203), the hose (204) is fixed. The roller structure of the peristaltic pump assembly (203) is in close contact with the hose (204). The front end of the hose (204) is connected to the transmission pipe (201). Inside the cooling box (104), the folded pipe (206) is connected. The upper end of the folded pipe (206) penetrates out of the left side of the cooling box (104), and the thermostat (208) is installed. The thermostat (208) is of a three-way valve structure. At the left valve, the output pipe (205) is connected. The front end of the output pipe (205) is connected to the rear end of the hose (204). The lower end of the return pipe (202) is connected to the front valve of the thermostat (208). The lower end of the folded pipe (206) also penetrates out of the cooling box (104) and is connected and communicated with the pipeline of the output pipe (205). The front side of the top of the folded pipe (206) is communicated with the water inlet pipe (207). The water inlet pipe (207) penetrates out of the top of the cooling box (104).

3. The segmented temperature difference cooling equipment for PVC film production according to claim 2, characterized in that: The cooling box (104) further includes a cooling fan (1041), an air outlet hood (1042) and heat sinks (1061). Inside the left side of the cooling box (104), the cooling fan (1041) is installed. On the right side of the cooling box (104), the air outlet hood (1042) is communicated. Inside the middle of the cooling box (104), large-area heat sinks (1061) are installed. The folded pipe (206) is tightly wound around the heat sinks (1061).

4. A segmented temperature difference cooling device for PVC film production according to claim 3, characterized in that: The rotating assembly includes a cylinder (106), a transmission frame (107), and a pushing member (108). A cylinder (106) is installed at the rear side of the upper part of the bracket (1). A pushing member (108) is connected to the telescopic rod of the cylinder (106). A transmission frame (107) is connected to the rear rotating frame (101). The pushing member (108) is slidably connected to the transmission frame (107).

5. A segmented temperature difference cooling device for PVC film production according to claim 4, characterized in that: It further includes a rectangular frame (301), an air-cooling fan (302), a flow guide block (303), an air filter (304), and a connecting frame (305). A connecting frame (305) is connected to the right side of the bracket (1). A rectangular frame (301) is installed on the right side of the connecting frame (305). An air-cooling fan (302) is installed in the middle of the top of the rectangular frame (301). A plurality of air outlets are provided in the upper and lower sides of the rectangular frame (301). Flow guide blocks (303) are connected to the middle of the upper and lower chambers in the rectangular frame (301). An air filter (304) is installed in the middle of the bottom of the rectangular frame (301).

6. The segmented temperature difference cooling device for PVC film production according to claim 5, characterized in that: It further includes a chassis (401), a cold water bucket (402), a roller (403), a sponge roller (501), and a hot air pipe (502). A chassis (401) is connected to the left side of the bracket (1). A cold water bucket (402) is installed on the chassis (401). A roller (403) is rotatably connected to the middle of the cold water bucket (402). Sponge rollers (501) are rotatably connected to the upper and lower sides of the left side of the top of the cold water bucket (402) symmetrically. A hot air pipe (502) is connected and communicated between the front ends and the rear ends of the two sponge rollers (501). The hot air pipe (502) is limited on the bracket (1) through a connecting ring. A rotary seal joint is used to achieve the rotational connection between the hot air pipe (502) and the sponge roller (501). The right ends of the two hot air pipes (502) are communicated with the air outlet hood (1042).

7. A segmented temperature difference cooling device for PVC film production according to claim 6, characterized in that: The water retaining frame (601) is also provided, and a water mist nozzle (602) is provided. The external pipe (603) is provided, and a wind wheel (701) is provided. The wind wheel (701) is provided, and a rotating disk (702) is provided. The sliding frame (703) is provided, and a movable frame (704) is provided, and a swing frame (705) is provided. The water retaining frame (601) is connected to the left side of the circular frame (301) on the connecting frame (305). Three water mist nozzles (602) are rotatably connected to the top of the water retaining frame (601). The external pipe (603) is symmetrically connected to the top of the water retaining frame (601). The external pipe (603) has three branch pipes. Each branch pipe is rotatably connected to the corresponding water mist nozzle (602) through a rotating sealing joint. The hot air pipe (502) is provided with a plurality of shunt pipes. The right side of the water retaining frame (601) is rotatably connected to a wind wheel (701), the inner side of the wind wheel (701) is connected to a rotating disk (702), the left side of the water retaining frame (601) is symmetrically slidably connected to a sliding frame (703), the upper end of the rotating disk (702) is provided with a protrusion, and the protrusion is embedded in a horizontal sliding groove at the lower end of the sliding frame (703) to achieve a horizontal sliding connection, the upper side of the water retaining frame (601) is symmetrically slidably connected to a moving frame (704) in the left and right directions, the moving frame (704) is obliquely slidably connected to the corresponding sliding frame (703), the front and rear ends of the water mist nozzle (602) are sleeved with a swing frame (705), and the upper end of the swing frame (705) is rotatably connected to the corresponding moving frame (704).

8. A segmented temperature difference cooling device for PVC film production according to claim 7, characterized in that: It also includes a guide wheel (8), the guide wheel (8) being symmetrically connected to the upper right side of the connecting frame (305), and the guide wheel (8) being symmetrically connected to the upper right side of the bottom frame (401).

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