Cooling and conveying device for PVC coiled materials

Abstract

The utility model is applicable to the technical field of film production and processing equipment, and discloses a cooling and conveying device for PVC (polyvinyl chloride) coiled materials, which comprises a conveying rack, a conveying roller group, a cooling roller group, an air cooling box, a water cooling air conditioner and an air guide component. The conveying roller set and the cooling roller set are rotationally arranged on the conveying rack. According to the utility model, the conveying roller group is arranged at the upstream of the cooling roller group, and the air cooling box is arranged above the conveying roller group, so that the PVC film can be pre-cooled before being pulled to the cooling roller group for cooling and shaping, namely the PVC film is subjected to a slow cooling process. When the thin film is subsequently pulled to the cooling roller set and is in contact with the cooling roller set with the lower temperature, the temperature difference change borne by the thin film is reduced, then the risk of thin film cracking is reduced, and meanwhile the phenomenon that water drops are hung on the surface of the thin film is avoided.

Description

Technical Field

[0001] This utility model relates to the field of film production and processing equipment technology, and in particular to a cooling and conveying device for PVC rolls. Background Technology

[0002] PVC (polyvinyl chloride) roll materials typically include PVC film, PVC wallpaper, and PVC flooring. PVC film, in particular, possesses excellent chemical resistance, weather resistance, and plasticity, making it suitable for various applications such as building decoration, food packaging, medical supplies, advertising signage, sporting goods, and household goods. Existing PVC film production equipment typically includes, in sequence along the process flow, a mixer, planetary extruder, open mill, filter, calender, cooling tank, drying assembly, cooling assembly, width-fixing cutting assembly, and winding assembly (see the transparent PVC roll material production equipment disclosed in Chinese Patent Document CN117245890A for details).

[0003] The drying unit is used to dry the cleaned PVC rolls, such as PVC film, while the cooling unit is used to cool the dried PVC film. However, after the PVC film is dried by the drying unit, the PVC film itself has a certain temperature. When the dried PVC film is directly cooled by the cooling unit, the PVC film experiences a large temperature change in a short period of time. This not only makes the PVC film prone to cracking, but also causes water droplets to appear on the surface of the PVC film. Utility Model Content

[0004] The purpose of this invention is to provide a cooling and conveying device for PVC rolls, which aims to solve the problem that when the dried PVC film is directly cooled by the cooling component, the PVC film is subjected to large temperature changes in a short period of time, which not only makes the PVC film prone to cracking, but also causes water droplets to appear on the surface of the PVC film.

[0005] To achieve the above objectives, the solution provided by this utility model is as follows:

[0006] A cooling and conveying device for PVC rolls includes a conveyor frame, and a conveying roller assembly and a cooling roller assembly rotatably mounted on the conveyor frame; the cooling roller assembly is located downstream of the conveying roller assembly; the cooling and conveying device for PVC rolls further includes:

[0007] An air-cooled box is fixedly mounted on the conveyor frame and is covered above the conveyor roller assembly.

[0008] A water-cooled air conditioner, which is fixedly mounted above the air-cooled box;

[0009] An air guide assembly is connected to the cold air outlet of a water-cooled air conditioner, and the air guide assembly has an air outlet located inside the air-cooled box.

[0010] Optionally, the air-cooled box includes a top plate horizontally positioned above the conveyor roller assembly, two baffles arranged along the length of the conveyor frame and located on both sides of the top plate, two windproof curtains arranged along the width of the conveyor frame, and a support column vertically fixed on the conveyor frame; the upper end of the windproof curtain is detachably connected to the top plate, and a conveying channel is formed between the lower end of the windproof curtain and the conveyor roller assembly; the upper end of the support column is connected to the top plate.

[0011] Optionally, the outer surface of the windbreak curtain is covered with adhesive tape, which is then glued to the surface of the support column.

[0012] Optionally, the upper end of the baffle is provided with a horizontal connecting part, and the bottom of the connecting part is provided with an insertion part; the top of the support column is provided with a slot that mates with the insertion part.

[0013] Optionally, the air guiding assembly includes a first air guiding pipe connected to the cold air outlet of the water-cooled air conditioner, a branch air pipe connected to the first air guiding pipe, and multiple air supply pipes located at the bottom of the branch air pipes and connected to the branch air pipes; the lower end of the air supply pipes extends into the air-cooled box.

[0014] Optionally, the outer wall of the first air duct is wrapped with a heat insulation layer.

[0015] Optionally, a supporting steel frame is provided on the outside of the conveyor frame, and the water-cooled air conditioner is mounted on the supporting steel frame. The water-cooled air conditioner includes a housing, a heat exchanger fixedly mounted on the bottom upper part of the housing, a blower mounted on the back of the housing, and a second air duct connected to the air outlet of the blower. The second air duct is connected to the air inlet on the back of the housing. Cold water is circulated inside the heat exchanger. The cold air outlet is located at the front of the housing.

[0016] Optionally, a filter screen is provided at the air inlet.

[0017] Optionally, a condensate drain pipe is connected to the bottom of the housing, and a drain control valve is provided on the condensate drain pipe.

[0018] Beneficial effects:

[0019] This invention provides a cooling and conveying device for PVC rolls. By setting a conveying roller group upstream of the cooling roller group and placing an air-cooling box above the conveying roller group, the PVC film can undergo a pre-cooling operation, i.e., a slow cooling process, before being drawn to the cooling roller group for cooling and shaping. When the PVC film is subsequently drawn to the cooling roller group and comes into contact with the cooler roller group, the temperature difference it experiences is reduced, thereby reducing the risk of film cracking and preventing water droplets from forming on the film surface. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of the cooling and conveying device for PVC rolls provided by this utility model. Figure 1 .

[0022] Figure 2 This is a schematic diagram of the structure of the cooling and conveying device for PVC rolls provided by this utility model. Figure 2 .

[0023] Figure 3 yes Figure 2 Enlarged view of section A.

[0024] Figure 4 This is a schematic diagram of the structure of the cooling and conveying device for PVC rolls provided by this utility model. Figure 3 .

[0025] Figure 5 This is a structural schematic diagram of the support column and baffle.

[0026] Figure 6 yes Figure 5 Enlarged view of section B.

[0027] Figure 7 yes Figure 5 Enlarged view of section C.

[0028] Figure 8 This is a simplified structural diagram of the water-cooled air conditioner.

[0029] Explanation of icon numbers:

[0030] 1-Conveyor frame;

[0031] 2-Conveyor roller assembly; 3-Cooling roller assembly; 301-Cooling roller; 302-Rotary joint;

[0032] 4-Air-cooled box; 401-Top plate; 402-Baffle; 403-Windproof curtain; 404-Support column; 405-Connecting part; 406-Insertion part;

[0033] 5-Water-cooled air conditioner; 501-Casing; 5011-Air inlet; 5012-Cold air outlet; 502-Heat exchanger; 503-Blower; 504-Second air duct; 505-Water inlet pipe; 506-Water outlet pipe;

[0034] 6-Air guide assembly; 601-First air guide duct; 602-Distribution duct; 603-Air supply duct;

[0035] 7- Adhesive tape; 8- Filter screen; 9- Condensate drain pipe; 10- Drain control valve; 11- Supporting steel frame. Detailed Implementation

[0036] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0037] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this utility model are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0038] It should also be noted that when a component is described as "fixed to" or "set on" another component, it can be directly on the other component or there may be an intervening component present. When a component is described as "connected to" another component, it can be directly connected to the other component or there may be an intervening component present.

[0039] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0040] Please see Figures 1 to 8 This utility model provides a cooling conveying device for PVC rolls. This cooling conveying device is a component of a PVC roll production apparatus and can be installed downstream of a PVC roll drying apparatus or drying assembly. Specifically, the PVC roll cooling conveying device includes a conveyor frame 1, a conveyor roller group 2, a cooling roller group 3, an air-cooled box 4, a water-cooled air conditioner 5, and an air guide assembly 6.

[0041] Both the conveying roller group 2 and the cooling roller group 3 are rotatably mounted on the conveyor frame 1. The conveying roller group 2 includes multiple conveying rollers arranged side by side. The air-cooled box 4 is fixedly mounted on the conveyor frame 1 and covers the conveying roller group 2. The water-cooled air conditioner 5 is fixedly mounted above the air-cooled box 4 and provides cold air to the interior of the air-cooled box 4 during operation, maintaining the temperature inside the air-cooled box 4 at approximately 14°C. To ensure that the cold air can be delivered to the air-cooled box 4, the cold air outlet 5012 of the water-cooled air conditioner 5 is connected to an air guide assembly 6, which has an air outlet located inside the air-cooled box 4. Through the guiding effect of the air guide assembly 6, the cold air generated by the water-cooled air conditioner 5 can be delivered to the air-cooled box 4. The cooling roller group 3 is located downstream of the conveying roller group 2.

[0042] In actual production, after PVC film or other types of PVC roll products are dried by the drying assembly, they are drawn onto the conveyor roller group 2. Since a cooling box 4 is installed above the conveyor roller group 2, the film passes through the cooling box 4 when it is drawn onto the conveyor roller group 2. This allows the film to be pre-cooled before being drawn onto the cooling roller group 3 for cooling and shaping, enabling the PVC film to undergo a slow cooling process. When the film is subsequently drawn onto the cooling roller group 3 and comes into contact with the lower-temperature cooling roller group 3, the temperature difference experienced by the film is reduced, thereby reducing the risk of film cracking and preventing water droplets from forming on the film surface.

[0043] Specifically, the cooling roller assembly 3 includes multiple cooling rollers 301 arranged side by side. During the cooling and shaping of the PVC film, the PVC film is wound in an inverted S-shape around the side-by-side cooling rollers 301, so that both sides of the PVC film can contact the cooling rollers 301, resulting in better cooling and shaping. In order to allow cooling water (which can come from the existing industrial circulating cooling water system in the workshop) to enter the cooling rollers 301, a rotary joint 302 is provided at the shaft end of the cooling rollers 301. This allows external cooling water pipes to be connected to the cooling rollers 301 through the rotary joint 302. When the cooling rollers 301 rotate, the rotary joint 302 can maintain the continuity of cooling water supply, allowing the cooling water to circulate inside the roller body, thereby achieving uniform cooling and shaping of the PVC film through heat exchange.

[0044] like Figure 1 and Figure 2As shown, in an optional embodiment, the air-cooled box 4 includes a top plate 401 horizontally positioned above the conveyor roller assembly 2, two baffles 402 arranged along the length of the conveyor frame 1 and located on both sides of the top plate 401, two windbreak curtains 403 arranged along the width of the conveyor frame, and multiple support columns 404 vertically fixed to the conveyor frame 1. Specifically, the two baffles 402 are respectively located on the two shaft ends of the conveyor rollers, and the lower ends of the baffles 402 can extend to below the top of the conveyor rollers. Combined with the use of the windbreak curtains 403, the leakage of cold air inside the air-cooled box 4 can be reduced.

[0045] Furthermore, the upper end of the windbreak curtain 403 is detachably connected to the top plate 401, for example, the upper end of the windbreak curtain 403 can be fixed to the side of the horizontally arranged top plate 401 by screws. A conveying channel is formed between the lower end of the windbreak curtain 403 and the conveying roller group 2 (the top of the conveying rollers) to ensure that the PVC film can be sent out of the air-cooling box 4 after pre-cooling; the upper end of the support column 404 is connected to the top plate 401, and the support column 404 is used to support and fix the top plate 401.

[0046] like Figure 2 and Figure 3 As shown, in an optional embodiment, the outer surface of the windbreak curtain 403 is covered with adhesive tape 7, which is glued to the surface of the support column 404. This allows the windbreak curtain 403 to be fixed in place by the adhesive tape 7, preventing it from fluttering under the influence of airflow within the air-cooled box 4 and reducing the leakage of cold air inside the air-cooled box 4. Furthermore, when maintenance of the conveyor roller assembly 2 is required, the adhesive tape 7 can be torn off the support column 404, and the windbreak curtain 403 can be draped over the top plate 401.

[0047] like Figures 5 to 7 As shown, in an optional embodiment, a connecting portion 405 is horizontally arranged at the upper end of the baffle 402, and an insertion portion 406 is vertically fixed at the bottom of the connecting portion 405; the top of the support column 404 is provided with a slot that mates with the insertion portion 406. In this embodiment, the arrangement of the connecting portion 405 and the insertion portion 406 allows the upper end of the baffle 402 to be simultaneously inserted into the tops of multiple side-by-side support columns 404, thereby enabling the baffle 402 to be detachably installed, facilitating maintenance of the conveyor roller group 2 by production personnel.

[0048] To ensure a reliable connection between the baffle 402 and the support column 404, when the upper end of the baffle 402 is inserted into the top of the support column 404, the baffle 402 can be further reinforced with screws. For example, screw holes can be provided on the side of the support column 404, and the baffle 402 and the support column 404 can be fixedly connected by screws.

[0049] Understandably, the number of baffles 402 located on the same side of the conveyor roller can be selected according to production needs, thereby meeting the production line layout requirements of PVC rolls of different sizes.

[0050] like Figure 1 As shown, in an optional embodiment, the air guiding assembly 6 includes a first air guiding duct 601 connected to the cold air outlet 5012 of the water-cooled air conditioner 5, a branch air duct 602 connected to the first air guiding duct 601, and multiple air supply ducts 603 located at the bottom of the branch air duct 602 and connected to the branch air duct 602; the lower end of the air supply duct 603 extends into the interior of the air-cooled box 4. In this embodiment, the first air guiding duct 601 is used to receive the cold air generated by the water-cooled air conditioner 5, so that the cold air is delivered to the branch air duct 602 for diversion and then delivered to the interior of the air-cooled box 4 by the multiple air supply ducts 603, ensuring a more uniform temperature distribution in different areas of the air-cooled box 4, improving the consistency of the pre-cooling effect, and helping to reduce the risk of cracking during the film cooling and shaping process.

[0051] In an optional embodiment, the outer wall of the first air duct 601 is wrapped with a heat insulation layer. The heat insulation layer can be made of materials with good heat insulation properties, such as glass wool or rock wool. By including a heat insulation layer on the outer wall of the first air duct 601, the loss of cold air during the transportation process can be reduced.

[0052] like Figure 1 , Figure 4 as well as Figure 8 As shown, in an optional embodiment, a supporting steel frame 11 is provided on the outer side of the conveyor frame 1, and the water-cooled air conditioner 5 is fixedly installed on the supporting steel frame 11, so that the water-cooled air conditioner 5 is fixed above the air-cooled box 4. Specifically, the water-cooled air conditioner 5 may include a box body 501, a heat exchanger 502 fixedly installed above the bottom of the box body 501, a blower 503 installed at the back of the box body 501, and a second air guide pipe 504 connected to the air outlet of the blower 503; the second air guide pipe 504 is connected to the air inlet 5011 at the back of the box body 501; the water inlet pipe 505 of the heat exchanger 502 is connected to the cold water outlet of the cooling tower through a circulating water pump, and the water outlet pipe 505 is connected to the return water outlet of the cooling tower, forming a closed circulation system, so that cold water is circulated in the heat exchanger 502. The cold air outlet 5012 is located at the front of the box body 501.

[0053] When the blower 503 is working, the blower 503 introduces external air into the air inlet 5011 at the back of the housing 501 through the second air guide pipe 504, so that the air enters the interior of the housing 501; while cold water is circulated in the heat exchanger 502 inside the housing 501. When the air flows through the heat exchanger 502, the air exchanges heat with the low temperature heat exchanger 502, so that the heat in the air is absorbed by the cold water, thereby lowering the temperature and forming cold air; then the cold air is driven by the airflow and discharged from the cold air outlet 5012 at the front of the housing 501, thus realizing the generation of cold air.

[0054] Of course, the water-cooled air conditioner 5 can also be an evaporative water-cooled air conditioner 5 (such as the Futai evaporative water-cooled air conditioner 5).

[0055] like Figure 8 As shown, in an optional embodiment, a filter screen 8 is provided at the air inlet 5011. The filter screen 8 can filter the air entering the water-cooled air conditioner 5 housing 501, intercepting particulate matter such as dust, impurities, and fibers in the air, preventing these pollutants from entering the housing 501 with the air and adhering to the surface of the heat exchanger 502, or mixing into the cold air. Thus, while improving the heat exchange efficiency between the air and the heat exchanger 502, it can also ensure the cleanliness of the cold air, preventing pollutants from entering the air-cooled box 4 with the cold air and contaminating the surface of the film or other PVC rolls, ensuring the production quality of the PVC rolls.

[0056] As an example, the filter screen 8 can be quickly installed and removed via a snap-fit ​​connection. For instance, an elastic snap can be installed at the air inlet 5011, and a slot that cooperates with the elastic snap can be provided on the frame of the filter screen 8. Thus, the filter screen 8 can be quickly installed and removed through the cooperation of the elastic snap and the slot, which facilitates the production personnel to clean and replace the filter screen 8 regularly.

[0057] like Figure 4 As shown, in an optional embodiment, a condensate drain pipe 9 is connected to the bottom of the housing 501, and a drain control valve 10 is provided on the condensate drain pipe 9. Since water vapor in the air condenses into condensate and collects at the bottom of the housing 501 when it exchanges heat with the heat exchanger 502 inside the housing 501, connecting the bottom of the housing 501 to the condensate drain pipe 9 effectively treats the condensate generated during the operation of the water-cooled air conditioner 5, preventing water accumulation from affecting the normal operation of the equipment. The drain control valve 10 can be a manual drain valve or an electric drain valve, which can flexibly control the timing and volume of drainage.

[0058] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the inventive concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A cooling and conveying device for PVC rolls, comprising a conveyor frame (1), and a conveying roller assembly (2) and a cooling roller assembly (3) rotatably mounted on the conveyor frame (1); wherein the cooling roller assembly (3) is located downstream of the conveying roller assembly (2); characterized in that, The cooling and conveying device for the PVC roll also includes: Air-cooled box (4), which is fixedly mounted above the conveyor roller group (2); Water-cooled air conditioner (5), which is fixedly mounted above the air-cooled box (4); The air guide assembly (6) is connected to the cold air outlet (5012) of the water-cooled air conditioner (5), and the air guide assembly (6) has an air outlet located inside the air-cooled box (4).

2. The cooling and conveying device for PVC rolls according to claim 1, characterized in that, The air-cooled box (4) includes a top plate (401) horizontally located above the conveyor roller group (2), two baffles (402) arranged along the length of the conveyor frame (1) and located on both sides of the top plate (401), two windproof curtains (403) arranged along the width of the conveyor frame (1), and a support column (404) vertically fixed on the conveyor frame (1); the upper end of the windproof curtain (403) is detachably connected to the top plate (401), and a conveying channel is formed between the lower end of the windproof curtain (403) and the conveyor roller group (2); the upper end of the support column (404) is connected to the top plate (401).

3. The cooling and conveying device for PVC rolls according to claim 2, characterized in that, The outer surface of the windbreak curtain (403) is covered with adhesive tape (7), which is glued to the surface of the support column (404).

4. The cooling and conveying device for PVC rolls according to claim 3, characterized in that, The upper end of the baffle (402) is provided with a connecting part (405) horizontally, and the bottom of the connecting part (405) is provided with an insertion part (406) vertically fixed; the top of the support column (404) is provided with a slot (4041) that cooperates with the insertion part (406).

5. The cooling and conveying device for PVC rolls according to claim 1, characterized in that, The air guide assembly (6) includes a first air guide duct (601) connected to the cold air outlet of the water-cooled air conditioner (5), a branch air duct (602) connected to the first air guide duct (601), and multiple air supply ducts (603) located at the bottom of the branch air duct (602) and connected to the branch air duct (602); the lower end of the air supply duct (603) extends into the interior of the air-cooled box (4).

6. The cooling and conveying device for PVC rolls according to claim 5, characterized in that, The outer wall of the first air duct (601) is covered with a heat insulation layer.

7. The cooling and conveying device for PVC rolls according to claim 1, characterized in that, A supporting steel frame (11) is provided on the outside of the conveyor frame (1). The water-cooled air conditioner (5) is provided on the supporting steel frame (11). The water-cooled air conditioner (5) includes a housing (501), a heat exchanger (502) fixedly installed above the bottom of the housing (501), a blower (503) installed on the back of the housing (501), and a second air duct (504) connected to the air outlet of the blower (503). The second air duct (504) is connected to the air inlet (5011) on the back of the housing (501). Cold water is circulated in the heat exchanger (502). The cold air outlet (5012) is located at the front of the housing (501).

8. The cooling and conveying device for PVC rolls according to claim 7, characterized in that, A filter screen (8) is installed at the air inlet (5011).

9. The cooling and conveying device for PVC rolls according to claim 7, characterized in that, The bottom of the housing (501) is connected to a condensate drain pipe (9), and a drain control valve (10) is provided on the condensate drain pipe (9).

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