Circulating water cooling system for artificial leather production

Abstract

This utility model discloses a circulating water cooling system for artificial leather production. The system features an inlet pipe and an outlet pipe at the left and right ends of a cooling roller, respectively. A water tank is connected to the right end of the outlet pipe, and the water tank is connected to a circulating water pool via a return pipe. The inlet pipe is also connected to the circulating water pool, forming a circulating water cooling system that improves heat exchange efficiency. Furthermore, the hollow cooling roller incorporates a liquid inlet pipe, a spray pipe, and an outlet pipe. Coolant enters the spray pipe through the inlet channel of the liquid inlet pipe and is sprayed onto the inner wall of the roller through spray holes. It then flows into the outlet channel of the liquid inlet pipe and finally exits the roller. This improves heat exchange efficiency and ensures uniform temperature on the roller surface and at both ends. Additionally, the baffle-type cooling channel inside the water tank extends the coolant's flow path, allowing the cooled coolant to slowly return to the circulating water pool after heat exchange, thus enhancing the air-cooling effect.

Description

Technical Field

[0001] This utility model belongs to the field of cooling system technology, specifically, it relates to a circulating water cooling system for artificial leather production. Background Technology

[0002] Cooling systems are essential in continuous production lines for plastic films, artificial leather, amorphous ribbons, metal sheets, and laminating machines. Artificial leather calendering or extrusion calendering lines typically employ multi-roller cooling devices to forcibly cool PVC / PU films or backing sheets that have just left the calendering unit at temperatures as high as 150℃~180℃, rapidly setting them, eliminating internal stress, and fixing the embossed texture. Chinese utility model patent CN205655726U discloses a simple and practical cooling machine roller drainage device. Specifically, it discloses that both ends of the cooling roller are fixed to the frame via bearings and bearing seats. The two ends of the cooling roller pass through the bearing seats and are connected to the inlet and outlet pipes respectively via rotary joints. The coolant in the cooling system enters through one rotary joint, flows through the internal channel of the cooling roller, and exits through the other rotary joint. However, this cooling system has at least the following problems: (1) The heat exchange efficiency is low and the large temperature difference between the cooling rollers causes uneven shrinkage of the artificial leather surface in the width direction. (2) Because there is no cover on the water tank, impurities can easily enter and the coolant after heat exchange can easily evaporate. (3) The coolant after heat exchange flows into the circulating water tank and cools down slowly and the self-cooling effect is poor. Therefore, based on the above technical problems, there is a need for a circulating water cooling system for artificial leather production that is simple in structure, easy to operate, has high heat exchange efficiency, and good cooling effect. Utility Model Content

[0003] The purpose of this invention is to provide a circulating water cooling system for artificial leather production that is simple in structure, easy to operate, has high heat exchange efficiency, and good cooling effect. By setting inlet pipes and outlet pipes at the left and right ends of the cooling roller respectively, and connecting a water tank to the right end of the outlet pipe, the water tank is connected to a circulating water pool through a return pipe. The inlet pipe is also connected to the circulating water pool, forming a circulating water cooling system, which improves heat exchange efficiency. Furthermore, by setting a liquid passage pipe, a liquid spraying horizontal pipe, and a liquid outlet horizontal pipe inside the roller body, the contact between the coolant and the inner wall of the roller body is more uniform, thereby ensuring a more balanced temperature of the roller body.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A circulating water cooling system for artificial leather production includes a frame and a cooling roller rotatably mounted on the frame. The cooling roller includes a liquid passage pipe and an internally hollow roller body. Both the liquid passage pipe and the roller body are arranged laterally. The liquid passage pipe is located at the center inside the roller body and penetrates the inside of the roller body. Both ends of the liquid passage pipe are located outside the roller body. Both ends of the liquid passage pipe are rotatably mounted on the frame via bearings and bearing seats. At least one baffle is provided inside the liquid passage pipe to divide the channel inside the liquid passage pipe into a liquid inlet channel on the left and a liquid outlet channel on the right. The liquid inlet channel is connected to a spray horizontal pipe through a first connecting pipe. The spray horizontal pipe is parallel to the liquid passage pipe and connected to the inner wall of the roller body. Several spray holes are arranged along the axial direction on the spray horizontal pipe. The liquid outlet channel is connected to a liquid outlet horizontal pipe parallel to the roller body through a second connecting pipe. Several liquid inlet holes are arranged along the axial direction on the liquid outlet horizontal pipe. The left ends of the liquid outlet horizontal pipe and the spray horizontal pipe are connected to the inner wall of the left side of the roller body, and the right ends of the liquid outlet horizontal pipe and the spray horizontal pipe are connected to the inner wall of the right side of the roller body. The left end of the liquid-passing pipe extends out of the bearing seat and is connected to the liquid inlet pipe connector. The right end of the liquid-passing pipe extends out of the bearing seat and is connected to the liquid outlet pipe. Rotary joints are provided between the liquid inlet pipe connector and the liquid-passing pipe, and between the liquid outlet pipe and the liquid-passing pipe. The right end of the liquid outlet pipe is located above the water receiving tank with an upper opening. A return water hole is opened at the bottom of the right side wall of the water receiving tank. The return water hole is connected to a return water pipe. The outlet of the return water pipe is connected to a circulating water tank. The liquid inlet pipe connector is connected to the circulating water tank through a liquid inlet hose. The liquid inlet hose is connected to a circulating water pump, which is placed inside the circulating water tank.

[0005] There are six horizontal spray pipes and six first connecting pipes. The six first connecting pipes are evenly arranged around the circumference of the liquid passage pipe. The inner end of the first connecting pipe is connected to the liquid inlet channel, and the outer end of the first connecting pipe is connected to the inside of the horizontal spray pipe. All six horizontal spray pipes are internally cut and connected to the inner wall of the roller body.

[0006] A filter screen is installed inside the return water hole.

[0007] The spray nozzles are arranged in two rows and are located on both sides of the tangent of the spray horizontal pipe and the inner wall of the roller.

[0008] The spray nozzles are arranged in two rows and are located on both sides of the tangent of the spray horizontal pipe and the inner wall of the roller.

[0009] There are three outlet horizontal pipes and three second connecting pipes. The three second connecting pipes are evenly arranged around the circumference of the liquid passage pipe. The inner end of the second connecting pipe is connected to the outlet channel, and the outer end of the second connecting pipe is connected to the inside of the outlet horizontal pipe. The inlet hole is located on the side close to the liquid passage pipe.

[0010] There are two baffles.

[0011] The water receiving tank includes an S-shaped flat box body welded from several welded plates. The inlet end of the S-shaped flat box body is equipped with an inlet sealing plate with a connection hole. The outlet end of the liquid outlet pipe passes through the connection hole and is placed inside the S-shaped flat box body. The outlet end of the S-shaped flat box body is equipped with an outlet sealing plate. The return water hole is located on the outlet sealing plate and is equipped with a filter screen. The bottom of the box body is equipped with a waste discharge pipe with a waste discharge valve.

[0012] The cooling roller of this application is hollow, so that the roller body is provided with corresponding liquid inlet pipe, liquid spraying horizontal pipe and liquid outlet horizontal pipe. The coolant enters the liquid spraying horizontal pipe through the liquid inlet channel of the liquid inlet pipe and is sprayed onto the inner wall of the roller body through the liquid spraying hole. Then it flows into the liquid outlet channel of the liquid inlet pipe through the liquid outlet horizontal pipe and finally flows out of the roller body. This can greatly improve the heat exchange efficiency and ensure the uniformity of temperature on the roller body surface and at both ends.

[0013] The S-shaped flat box body of the water tank in this application has a baffle-type cooling channel inside, which can extend the flow path of the coolant and allow the heat-exchanged coolant to slowly flow back into the circulating water pool, thereby improving the air cooling effect of the coolant. In conjunction with the corresponding circulation system (the coolant reaches the cooling roller through the inlet hose and finally returns to the circulating water pool, and then reaches the cooling roller again through the inlet hose), the heat exchange efficiency is improved. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model.

[0015] Figure 2 This is a front view of the present invention.

[0016] Figure 3 yes Figure 2 A cross-sectional view of plane AA.

[0017] Figure 4 yes Figure 2 A cross-sectional view of the BB plane.

[0018] Figure 5 This is a top view of the present invention.

[0019] Figure 6 yes Figure 5 A cross-sectional view of the C-plane.

[0020] Figure 7 This is a cross-sectional schematic diagram of the water receiving tank of this utility model. Detailed Implementation

[0021] like Figure 1-7As shown, a circulating water cooling system for artificial leather production includes a frame 15 and a cooling roller 12 rotatably mounted on the frame 15. The cooling roller 12 includes a liquid passage pipe 1 and a hollow roller body 2. Both the liquid passage pipe 1 and the roller body 2 are arranged laterally. The liquid passage pipe 1 is located at the center inside the roller body 2 and penetrates the inside of the roller body 2. Both ends of the liquid passage pipe 1 are located outside the roller body 2. Both ends of the liquid passage pipe 1 are rotatably mounted on the frame 15 through bearings and bearing seats 13. At least one baffle 5 is provided inside the liquid passage pipe 1 to divide the channel inside the liquid passage pipe 1 into a liquid inlet channel 3 on the left and a liquid outlet channel 4 on the right. In this example, there are two baffles 5. The liquid inlet channel 3 is filled with the coolant before heat exchange, while the liquid outlet channel 4 is filled with the coolant after heat exchange. By setting two baffles 5 to separate the liquid inlet channel 3 and the liquid outlet channel 4, it is possible to effectively prevent the coolant after heat exchange from exchanging heat with the coolant before heat exchange again.

[0022] The liquid inlet channel 3 is connected to a spray pipe 7 via a first connecting pipe 6. The spray pipe 7 is parallel to the liquid passage pipe 1 and connected to the inner wall of the roller body 2. Several spray holes 8 are arranged axially on the spray pipe 7. The liquid outlet channel 4 is connected to a liquid outlet pipe 10 parallel to the roller body 2 via a second connecting pipe 9. Several inlet holes 11 are arranged axially on the liquid outlet pipe 10, and the inlet holes 11 are located on the side close to the liquid passage pipe 1. The left ends of the liquid outlet pipe 10 and the spray pipe 7 are connected to the left inner wall of the roller body 2, and the right ends of the liquid outlet pipe 10 and the spray pipe 7 are connected to the right inner wall of the roller body 2. The left end of the liquid-conducting pipe 1 extends out of the bearing seat 13 and is connected to the liquid inlet pipe connector 19. The right end of the liquid-conducting pipe 1 extends out of the bearing seat 13 and is connected to the liquid outlet pipe 16. Rotary joints 17 (conventional technology, commercially available) are provided between the liquid inlet pipe connector 19 and the liquid-conducting pipe 1, and between the liquid outlet pipe 16 and the liquid-conducting pipe 1. The right end of the liquid outlet pipe 16 is located above the water receiving tank 18 with an upper opening. A return water hole is opened at the bottom of the right side wall of the water receiving tank 18. The return water hole is connected to the return water pipe 20. The outlet of the return water pipe 20 is connected to the circulating water pool 21. The liquid inlet pipe connector 19 is connected to the circulating water pool 21 through the liquid inlet hose 14. The liquid inlet hose 14 is connected to the circulating water pump, which is placed inside the circulating water pool 21.

[0023] The circulating water pump draws coolant (pure water) from the circulating water tank 21, and through the inlet hose 14, it enters the inlet channel 3 from the left end of the liquid passage pipe 1. Then, it passes through the first connecting pipe 6 to the spray horizontal pipe 7, and then sprays out from the spray hole 8, directly onto the inner wall of the liquid passage pipe 1 to cool the roller body 2 (the outlet of the spray hole 8 is inclined towards the inner wall of the roller body 2). During the rotation of the roller body 2, the artificial leather passing through the outer surface of the roller body 2 is cooled. The coolant collects in the center of the roller body 2. After heat exchange, the coolant enters the outlet horizontal pipe 10 in the center of the roller body 2, and then flows through the outlet pipe 16 to the water receiving tank 18. Finally, it flows into the circulating water tank 21 through the return water pipe 20. The outlet end of the inlet hose 14 is connected to the circulating water tank 21, forming a circulation of coolant, thereby effectively improving the heat exchange efficiency and ensuring the uniformity of the temperature in the axial direction of the roller body 2.

[0024] There are six spray pipes 7 and six first connecting pipes 6 (the number of spray pipes 7 and first connecting pipes 6 can be set according to actual production needs, and can also be set to eight, ten or twelve, etc.). The six first connecting pipes 6 are evenly arranged along the circumference of the liquid passage pipe 1. The inner end of the first connecting pipe 6 is connected to the liquid inlet channel 3, and the outer end of the first connecting pipe 6 is connected to the inside of the spray pipe 7. All six spray pipes 7 are internally cut and connected (welded) to the inner wall of the roller body 2, which can reduce the distance between the spray pipe 7 and the inner wall of the roller body 2, so that the coolant is sprayed onto the inner wall of the roller body 2 more quickly, further improving the heat exchange efficiency and ensuring the uniformity of the temperature of the roller body 2. In addition, the spray pipes 7 are connected to the inner wall of the roller body 2 so that the spray pipes 7 and the first connecting pipes 6 form a support for the roller body 2, which can make the thickness of the roller body 2 as thin as possible (improving the cooling effect) and ensuring that the roundness of the roller body 7 is not deformed. The six horizontal spray pipes 7 are evenly arranged, which can more effectively cool the roller body 2, further improve the heat exchange efficiency and ensure the uniformity of temperature at both ends of the roller body 2.

[0025] Two rows of spray holes 8 are arranged on both sides of the tangent between the spray pipe 7 and the inner wall of the roller 2. The two rows of spray holes 8 simultaneously spray liquid onto the inner wall of the roller 2, effectively improving heat exchange efficiency and ensuring temperature uniformity of the roller 2. There are three outlet pipes 10 and three second connecting pipes 9, evenly arranged along the circumference of the liquid passage pipe 1. The inner end of each second connecting pipe 9 connects to the outlet channel 4, and the outer end connects to the interior of the outlet pipe 10. The three outlet pipes 10 improve the discharge efficiency of the coolant after heat exchange, thereby improving heat exchange efficiency and ensuring temperature uniformity of the roller 2.

[0026] The manufacturing process of the cooling roller in this utility model is as follows: First, a liquid passage pipe 1, a first connecting pipe 6, a liquid spraying horizontal pipe 7, a liquid outlet horizontal pipe 10, and a second connecting pipe 9 are set inside the roller body 2. Circular blocking plates 27 are welded to both the left and right ends of the liquid outlet horizontal pipe 10 and the liquid spraying horizontal pipe 7. Circular holes for accommodating the circular blocking plates 27 are opened on both the left and right side walls of the roller body 2. After the left and right side walls of the roller body 2 are fitted onto the liquid passage pipe 1 and moved to the left and right ends of the roller body 2, the circular blocking plates 27 are located within the circular holes of the left and right side walls of the roller body. Finally, the left and right side walls are welded to the roller body 2 and the circular blocking plates 27 as a whole. Figure 2 As shown, each outlet horizontal pipe 10 is installed between two adjacent first connecting pipes 6.

[0027] The water receiving tank 18 includes an S-shaped flat box 22 welded from several welded plates. An inlet sealing plate is provided at the inlet end of the S-shaped flat box 22, and a connection hole is provided on the inlet sealing plate. The outlet end of the liquid outlet pipe 16 passes through the connection hole and is placed inside the S-shaped flat box 22. An outlet sealing plate is provided at the outlet end of the S-shaped flat box 22, and a return water hole is provided on the outlet sealing plate. The baffle-type cooling channel 26 inside the S-shaped flat box 22 can extend the flow path of the coolant, allowing the heat-exchanged coolant to cool down rapidly. A filter screen 25 is provided in the return water hole to filter out impurities in the coolant. A drain pipe 23 is provided at the bottom of the S-shaped flat box 22, and a drain valve 24 is provided on the drain pipe 23. Furthermore, as... Figure 7 Support rods 28 are provided between the upper and lower adjacent cantilever arms of the S-shaped flat box 22 shown to ensure the stability of the S-shaped flat box 22.

[0028] In practical use, the circulating water pump draws coolant from the circulating water tank 21 and enters the inlet channel 3 from the left end of the liquid inlet pipe 1 through the inlet hose 14. Due to the presence of the baffle 5, the coolant cannot directly enter the outlet channel 4 from the inlet channel 3, but instead enters the spray horizontal pipe 7 through six first connecting pipes 6. The two ends of the spray horizontal pipe 7 are respectively connected to the left and right inner walls of the roller body 2 and are both sealed. The coolant is sprayed from the spray holes 8 onto the inner wall of the roller body 2 to cool the roller body 2. During the rotation of the roller body 2, the artificial leather passing over the outer surface of the roller body 2 is cooled. The coolant collects in the center of the roller body 2. After heat exchange, the coolant enters the outlet horizontal pipe 10 at the center of the roller body 2. The two ends of the outlet horizontal pipe 10 are connected to the left inner wall and the right inner wall of the roller body 2 respectively and are both closed. The coolant enters the outlet channel 4 through the second connecting pipe 9, and then flows into the water receiving tank 18 through the outlet pipe 16. After being filtered by the filter screen 25 in the return water hole at the bottom of the water receiving tank 18, it flows into the circulating water pool 21 through the return water pipe 20. Since the outlet end of the inlet hose 14 is connected to the circulating water pool 21, the coolant in the circulating water pool 21 enters the inlet channel 3 of the liquid passage pipe 1 through the inlet pipe 14 again, thus forming a circulating water cooling system.

[0029] The cooling roller 12 of this application is hollow, allowing the roller body 2 to be equipped with a corresponding liquid inlet pipe 1, a liquid spraying horizontal pipe 7, and a liquid outlet horizontal pipe 10. Coolant enters the liquid spraying horizontal pipe 7 through the liquid inlet channel 3 of the liquid inlet pipe 1 and is sprayed onto the inner wall of the roller body 2 through the liquid spraying holes 8. It then flows into the liquid outlet channel 4 of the liquid inlet pipe 1 through the liquid outlet horizontal pipe 10, and finally flows out of the roller body 2. This greatly improves heat exchange efficiency and ensures the uniformity of temperature on the surface and at both ends of the roller body 2. Furthermore, the baffle-type cooling channel 26 inside the S-shaped flat box 22 of the water tank 18 of this application can extend the coolant flow path, allowing the heat-exchanged coolant to slowly flow back into the circulating water tank 21, improving the air-cooling effect of the coolant. Combined with the corresponding circulation system (coolant reaches the cooling roller 12 via the liquid inlet hose 14 and finally returns to the circulating water tank 21, then reaches the cooling roller 12 again via the liquid inlet hose 14), heat exchange efficiency is further improved.

[0030] The above embodiments are only used to illustrate and not limit the technical solutions of this utility model. Although the utility model has been described in detail with reference to the above embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the utility model without departing from the spirit and scope of the utility model. Any modifications or partial substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A circulating water cooling system for artificial leather production, comprising a frame and a cooling roller rotatably arranged on the frame, characterized in that: The cooling roller includes a liquid passage pipe and an internally hollow roller body. Both the liquid passage pipe and the roller body are arranged laterally. The liquid passage pipe is located at the center of the roller body and runs through the inside of the roller body. Both ends of the liquid passage pipe are located on the outside of the roller body. Both ends of the liquid passage pipe are rotatably mounted on the frame through bearings and bearing seats. At least one baffle is provided inside the liquid passage pipe to divide the channel inside the liquid passage pipe into a liquid inlet channel on the left and a liquid outlet channel on the right. The liquid inlet channel is connected to a spray horizontal pipe through a first connecting pipe. The spray horizontal pipe is parallel to the liquid passage pipe and connected to the inner wall of the roller body. Several spray holes are provided on the spray horizontal pipe along the axial direction. The liquid outlet channel is connected to a liquid outlet horizontal pipe parallel to the roller body through a second connecting pipe. Several liquid inlet holes are provided on the liquid outlet horizontal pipe along the axial direction. The left ends of the liquid outlet horizontal pipe and the spray horizontal pipe are connected to the inner wall of the left side of the roller body, and the right ends of the liquid outlet horizontal pipe and the spray horizontal pipe are connected to the inner wall of the right side of the roller body. The left end of the liquid-passing pipe extends out of the bearing seat and is connected to the liquid inlet pipe connector. The right end of the liquid-passing pipe extends out of the bearing seat and is connected to the liquid outlet pipe. Rotary joints are provided between the liquid inlet pipe connector and the liquid-passing pipe, and between the liquid outlet pipe and the liquid-passing pipe. The right end of the liquid outlet pipe is connected to a water receiving tank. A return water hole is opened on the water receiving tank. The return water hole is connected to a return water pipe. The outlet of the return water pipe is connected to a circulating water pool. The liquid inlet pipe connector is connected to the circulating water pool through a liquid inlet hose. The liquid inlet hose is connected to a circulating water pump, which is placed in the circulating water pool.

2. The recirculating water cooling system for artificial leather production according to claim 1, characterized in that: There are six horizontal spray pipes and six first connecting pipes. The six first connecting pipes are evenly arranged around the circumference of the liquid passage pipe. The inner end of the first connecting pipe is connected to the liquid inlet channel, and the outer end of the first connecting pipe is connected to the inside of the horizontal spray pipe. All six horizontal spray pipes are internally cut and connected to the inner wall of the roller body.

3. The recirculating water cooling system for artificial leather production according to claim 2, characterized in that: A filter screen is installed inside the return water hole.

4. The recirculating water cooling system for artificial leather production according to claim 3, characterized in that: The spray nozzles are arranged in two rows and are located on both sides of the tangent line between the spray horizontal pipe and the inner wall of the roller.

5. The recirculating water cooling system for artificial leather production according to claim 4, characterized in that: The spray nozzles are arranged in two rows and are located on both sides of the tangent line between the spray horizontal pipe and the inner wall of the roller.

6. The recirculating water cooling system for artificial leather production according to claim 5, characterized in that: There are three outlet horizontal pipes and three second connecting pipes. The three second connecting pipes are evenly arranged around the circumference of the liquid passage pipe. The inner end of the second connecting pipe is connected to the outlet channel, and the outer end of the second connecting pipe is connected to the inside of the outlet horizontal pipe. The inlet hole is located on the side close to the liquid passage pipe.

7. The recirculating water cooling system for artificial leather production according to claim 6, characterized in that: There are two baffles.

8. The recirculating water cooling system for artificial leather production according to claim 7, characterized in that: The water receiving tank includes an S-shaped flat box body welded from several welded plates. The inlet end of the S-shaped flat box body is equipped with an inlet sealing plate with a connection hole. The outlet end of the liquid outlet pipe passes through the connection hole and is placed inside the S-shaped flat box body. The outlet end of the S-shaped flat box body is equipped with an outlet sealing plate. The return water hole is located on the outlet sealing plate and is equipped with a filter screen. The bottom of the box body is equipped with a waste discharge pipe with a waste discharge valve.

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