Press roller cooling water circulation system and breathable film production line

Abstract

The utility model relates to the technical field of film production, in particular to a compression roller cooling water circulation system and a breathable film production line. The compression roller cooling water circulation system comprises a cooling water unit, a reservoir unit, a compression roller unit and a normal-temperature water unit, the cooling water unit comprises a cooling tower and a cooling-water machine connected with the cooling tower; the reservoir unit comprises a cold water tank, a water return tank and a filter tank; a first water inlet of the cooling-water machine is connected with the water return pool, and a first water outlet of the cooling-water machine is connected with the cold water pool; a water inlet of a compression roller module of the compression roller unit is connected with the cold water pool; a first water outlet of a normal-temperature water tank of the normal-temperature water unit is connected with a water inlet of a compression roller module, and a water outlet of the compression roller module is connected with the normal-temperature water tank and a filter tank. During production, cooling water in the cold water pool enters the compression roller unit, and the cooling water cools the compression roller. When production is changed or production is temporarily stopped, conveying of chilled water is stopped, normal-temperature water in the normal-temperature water tank cools the compression roller module, and the mode is more energy-saving and economical.

Description

Technical Field

[0001] This utility model relates to the field of film production technology, and in particular to a roller cooling water circulation system and a breathable membrane production line. Background Technology

[0002] The main reason why pressure rollers require a water cooling system is to reduce the roller temperature and prevent the equipment from overheating. During operation, the pressure rollers generate a large amount of heat through friction between the rollers and the material. If this heat is not dissipated in time, the roller surface material will deform or even be damaged due to thermal fatigue, affecting the equipment's accuracy and lifespan. The water cooling system removes heat through circulating water, keeping the rollers within a reasonable temperature range and ensuring stable equipment operation and crushing efficiency.

[0003] During film production, there are times when production is temporarily halted or switched to other processes. However, the pressure rollers need to run continuously. During these times, the heat generated by the pressure rollers is minimal. Continuously using cooling water to cool the pressure rollers would be energy-intensive, inefficient, and uneconomical. While some cooling water circulation devices are available on the market that can cool the pressure rollers, some equipment can only continuously use cooling water to cool the rollers, which is also inefficient and uneconomical.

[0004] For example, Chinese patent application number CN202021468611.6 describes a circulating cooling system for a printing press cooling roller. This circulating cooling system can only continuously supply cooling water to cool the pressure roller. When production is temporarily stopped or switched to other processes, the heat generated by the pressure roller is very small. Continuously using cooling water to cool the pressure roller is wasteful, not energy-efficient, and uneconomical.

[0005] For example, Chinese patent application number CN202322216734.0 describes a rapid cooling device for PET film processing. This design also means that the cooling circulation system can only continuously supply cooling water to cool the pressure rollers. When production is temporarily stopped or switched to other products, the heat generated by the pressure rollers is very small. Continuously using cooling water to cool the pressure rollers is wasteful, not energy-efficient, and uneconomical. Utility Model Content

[0006] In view of this, the present invention addresses the deficiencies of the existing technology and its main purpose is to provide a cooling water circulation system for the pressure roller, in which the pressure roller unit can be cooled by either cooling water or room temperature water, which is more energy-efficient and economical, thereby overcoming the shortcomings of the existing technology.

[0007] To achieve the above objectives, the present invention adopts the following technical solution:

[0008] This application provides a cooling water circulation system for a pressure roller, including a cooling water unit, a water storage tank unit, a pressure roller unit, and a normal temperature water unit;

[0009] The cooling water unit includes a cooling tower and a chiller connected to the cooling tower;

[0010] The water storage tank unit includes a cold water tank, a return water tank, and a filtration tank; the filtration tank is equipped with a filter element; the filtration tank is connected to the return water tank, and the water in the filtration tank can enter the return water tank.

[0011] The first inlet of the chiller is connected to the return water tank, and the first outlet of the chiller is connected to the cold water tank.

[0012] The pressure roller unit includes a pressure roller module; the inlet of the pressure roller module is connected to the cold water tank; the ambient temperature water unit includes an ambient temperature water tank; the first outlet of the ambient temperature water tank is connected to the inlet of the pressure roller module, and the outlet of the pressure roller module is connected to the ambient temperature water tank and the filter tank.

[0013] Preferably, the cold water tank is connected to the water supply unit; the water supply unit includes a filter and a water softener connected to the filter; the outlet of the water softener is connected to the cold water tank.

[0014] Preferably, the water softener is connected to a room temperature water tank, and the water softener inputs soft water into the room temperature water tank.

[0015] Preferably, the filter element includes a filter cotton layer and a charcoal layer, with the filter cotton layer on top of the charcoal layer; the gaps between the upper and lower charcoal layers are staggered.

[0016] Preferably, the charcoal layer has two layers; the diameter of the charcoal in the upper charcoal layer is smaller than the diameter of the charcoal in the lower charcoal layer.

[0017] Preferably, the second outlet of the chiller is connected to the inlet of the cooling tower; the second inlet of the chiller is connected to the outlet of the cooling tower, and a temperature sensor and a first water pump are installed at the second inlet of the chiller.

[0018] Preferably, the pressure roller module includes a first pressure roller module and a second pressure roller module;

[0019] The first pressure roller module includes an extrusion rubber roller, an extrusion steel roller, an auxiliary steel roller, and a cooling steel roller; the extrusion rubber roller and the extrusion steel roller are pressed together; the auxiliary steel roller is pressed together; and the cooling steel roller is pressed together.

[0020] The second pressure roller module includes stretching steel rollers, with adjacent stretching steel rollers pressed together;

[0021] The inlet and outlet of the extrusion rubber roller, extrusion steel roller, auxiliary steel roller, cooling steel roller, and stretching steel roller are all equipped with flow regulating valves and pressure gauges.

[0022] Preferably, the cold water tank is connected in sequence to a primary water inlet network and a secondary water inlet network; the inlets of the first and second pressure roller modules are connected to the corresponding secondary water inlet networks; the outlets of the first and second pressure roller modules are connected to the secondary water outlet network; the secondary water inlet network is connected to the return water network; the return water network is connected to the filter tank and the ambient temperature water tank; and a return water unit is provided between the primary water inlet network and the return water network.

[0023] Preferably, the cold water tank, return water tank, and filter tank are integrally welded stainless steel water tanks; the ambient temperature water tank is a stainless steel water tank.

[0024] This application provides a breathable membrane production line, including the aforementioned pressure roller cooling water circulation system, extruder, and casting machine; the pressure roller unit is provided on both the extruder and the casting machine.

[0025] Compared with the prior art, this utility model has obvious advantages and beneficial effects. Specifically, as can be seen from the above technical solution, the cooling water unit can generate cooling water; the water storage tank unit plays the role of storing cooling water, recycling circulating water, and filtering water; the ambient temperature water unit supplies ambient temperature water, which can enter the pressure roller module.

[0026] During production, chilled water from the chiller enters the chilled water tank, and the cooling water in the chilled water tank then enters the pressure roller unit to cool the pressure rollers. When production is switched or temporarily stopped, the supply of chilled water is stopped, and room temperature water from the ambient temperature water tank is supplied to the pressure roller module to cool it. Therefore, the use of either chilled water or ambient temperature water to cool the pressure roller module is switchable, making it more energy-efficient and economical. Attached Figure Description

[0027] Figure 1 This is an overall schematic diagram of one embodiment of the present utility model.

[0028] Explanation of reference numerals in the attached diagram:

[0029] 10. Cooling water unit; 11. Cooling tower; 12. Third pipe; 13. Fourth pipe connection; 14. Chiller; 15. Temperature sensor; 16. First water pump; 17. Sixth pipe; 18. First flow regulating valve; 19. Second water pump; 20. Water storage tank unit; 21. Cold water tank; 22. Primary water inlet network; 23. Secondary water inlet network; 24. Return water tank; 25. Filter tank; 26. Filter cotton layer; 27. 30. Charcoal layer; 31. Water replenishment unit; 32. Soft water processor; 43. Filter; 44. Pressure roller unit; 45. First pressure roller module; 46. Extrusion rubber roller; 47. Extrusion steel roller; 48. Auxiliary steel roller; 49. Cooling steel roller; 20. Second pressure roller module; 40. Stretching steel roller; 51. Normal temperature water unit; 52. Normal temperature water tank; 53. Return water network; 64. Seventh pipeline; 65. Return water unit; 66. Third water pump. Detailed Implementation

[0030] To further illustrate the technical means and effects adopted by this utility model in order to achieve the intended utility model purpose, the following detailed description of the specific implementation methods, structure, features and effects of this utility model is provided in conjunction with the accompanying drawings and preferred embodiments.

[0031] Example 1

[0032] Please refer to Figure 1 As shown, it illustrates the specific structure of a preferred embodiment of the present invention, which is a roller cooling water circulation system.

[0033] The pressure roller module can use cooling water or room temperature water to cool the pressure roller, which is more energy-efficient and economical.

[0034] This application provides a cooling water circulation system for a pressure roller, including a cooling water unit 10, a water storage tank unit 20, a pressure roller unit 40, and a normal temperature water unit 50. The cooling water unit 10 includes a cooling tower 11 and a chiller 14 connected to the cooling tower 11. The water storage tank unit 20 includes a cold water tank 21, a return water tank 24, and a filter tank 25. A filter element is installed in the filter tank 25. The filter tank 25 is connected to the return water tank 24, and the water in the filter tank 25 can enter the return water tank 24. The first inlet of the chiller 14 is connected to the return water tank 24, and the first outlet of the chiller 14 is connected to the cold water tank 21. The pressure roller unit 40 includes a pressure roller module. The inlet of the pressure roller module is connected to the cold water tank 21. The normal temperature water unit 50 includes a normal temperature water tank 51. The first outlet of the normal temperature water tank 51 is connected to the inlet of the pressure roller module, and the outlet of the pressure roller module is connected to the filter tank 25 and the normal temperature water tank 51.

[0035] Cooling water unit 10 generates cooling water, the temperature of which can be between 0-10°C, specifically 2°C, 5°C, 10°C, etc. Water storage tank unit 20 stores cooling water, circulating water, and filtered water. Room temperature water unit 50 supplies room temperature water to cool the pressure roller module. Pressure roller unit 40 is used to roll the film.

[0036] During production: 1. Heat exchange occurs between the cooling tower 11 and the chiller 14, with the chiller 14 generating cooling water. The chiller 14 delivers the water to the cold water tank 21 via the sixth pipe 17, which is equipped with a first flow regulating valve 18 and a second water pump 19. 2. The cooling water in the cold water tank 21 enters the secondary water inlet network 23 after passing through the primary inlet network 22. The inlets of the first pressure roller module 41 and the second pressure roller module 46 are connected to their respective secondary inlet networks 23; the outlets of the first pressure roller module 41 and the second pressure roller module 46 are connected to the secondary outlet network; the water exiting the pressure rollers of the first pressure roller module 41 and the second pressure roller module 46 returns to the filter tank 25 and / or the ambient temperature water tank 51 via the secondary outlet network and the return water network 52.

[0037] During production switching: 1. The chiller 14 stops working. The ambient temperature water in the ambient temperature water tank 51 enters the secondary inlet water network 23 through the seventh pipe 53, and then enters the first pressure roller module 41 and the second pressure roller module 46. The ambient temperature water cools the first pressure roller module 41 and the second pressure roller module 46. The secondary outlet water network is connected to the return water network 52. The ambient temperature water from the first pressure roller module 41 and the second pressure roller module 46 returns to the ambient temperature water tank 51 and / or the filter tank 25 through the return water network 52. It can be seen that this pressure roller cooling water circulation system can switch between cooling water and ambient temperature water, which is more energy-efficient and economical.

[0038] Cooling tower 11 is a device that uses water as a circulating coolant to absorb heat from the system and release it into the atmosphere. Chiller 14 (also known as ice water machine or freezer) is a device that uses refrigeration cycle components such as compressor, condenser, and evaporator to lower the water temperature to a set range, and is used to provide a stable cooling water source for industrial or commercial scenarios.

[0039] Preferably, the cold water tank 21 is connected to the water replenishment unit 30; the water replenishment unit 30 includes a filter 32 and a water softener 31 connected to the filter 32; the outlet of the water softener 31 is connected to the cold water tank 21. The water softener 31 is connected to the ambient temperature water tank 51, and the water softener 31 inputs softened water into the ambient temperature water tank 51. Municipal water passes through the filter 32 and enters the water softener 31, and then is delivered to the cold water tank 21, which can safely and efficiently replenish the water volume. At the same time, the water softener 31 can also replenish the ambient temperature water tank 51.

[0040] The water softener 31 is a device used to reduce the calcium and magnesium ion content in water, thereby reducing scale formation and improving water quality. Its main working principle is to remove calcium and magnesium ions from the water through ion exchange technology, thus reducing water hardness.

[0041] Preferably, the filter cotton layer 26 and the charcoal layer 27 work together to filter impurities in the water, improving water safety and preventing clogging. The filter element includes a filter cotton layer 26 and a charcoal layer 27, with the filter cotton on top of the charcoal; the gaps between the upper and lower charcoal layers 27 are staggered. There are two charcoal layers 27; the diameter of the charcoal in the upper charcoal layer 27 is smaller than the diameter of the lower charcoal layer 27. This design not only ensures smooth water flow but also improves filtration efficiency.

[0042] Preferably, a third pipe 12 and a fourth pipe 13 are provided between the chiller 14 and the cooling tower 11; wherein, a temperature sensor 15 and a first water pump 16 are provided on the third pipe 12. The temperature sensor 15 can sense the temperature of the cooling medium for control and adjustment. The first water pump 16 provides power to drive the movement of the cooling medium in the third pipe 12.

[0043] Preferably, the pressure roller module includes a first pressure roller module 41 and a second pressure roller module 46. The first pressure roller module 41 includes an extrusion rubber roller 42, an extrusion steel roller 43, an auxiliary steel roller 44, and a cooling steel roller 45. The extrusion rubber roller 42 and the extrusion steel roller 43 are pressed together; the auxiliary steel roller 44 is pressed together; and the cooling steel roller 45 is pressed together. The second pressure roller module 46 includes a stretching steel roller 47, with adjacent stretching steel rollers 47 pressed together. The inlet and outlet of the extrusion rubber roller 42, the extrusion steel roller 43, the auxiliary steel roller 44, the cooling steel roller 45, and the stretching steel roller 47 are all equipped with flow regulating valves and pressure gauges. After the film exits the extruder, it first enters the first pressure roller module 41 and then the second pressure roller module 46. The film rolling sequence is as follows: 1. The film is rolled by the extrusion rubber roller 42 and the extrusion steel roller 43. 2. The auxiliary steel rollers 44 on the side press on the middle auxiliary steel roller 44, and the three auxiliary steel rollers 44 roll the film. 3. Cooling steel roller 45 rolls the film. 4. Stretching steel rollers 47, in pairs, roll the film. Therefore, with the combined action of the first pressure roller module 41 and the second pressure roller module 46, processes such as film texture pressing, thickness control, and length stretching can be completed.

[0044] Preferably, the cold water tank 21 is sequentially connected to a primary water inlet network 22 and a secondary water inlet network 23. The inlets of the first pressure roller module 41 and the second pressure roller module 46 are connected to the corresponding secondary water inlet network 23. The outlets of the first pressure roller module 41 and the second pressure roller module 46 are connected to a secondary water outlet network. The secondary water inlet network 23 is connected to a return water network 52. The return water network 52 is connected to the filter tank 25 and the ambient temperature water tank 51. A return water unit is provided between the primary water inlet network 22 and the return water network 52. Specifically, the pressure roller cooling water circulation system also includes a return water unit, which is connected to the primary water inlet network 22 and the return water network 52. When the third water pump of the return water unit is working, it can circulate the cooling water in the cold water tank 21 to the filter tank 25 and / or the ambient temperature water tank 51. This design helps to quickly adjust the temperature of the pipeline and improve production efficiency.

[0045] Preferably, the cold water pool 21, the return water pool 24, and the filter pool 25 are integrally welded stainless steel pools; the ambient temperature water tank 51 is a stainless steel water tank. The stainless steel pools and tanks can be coated to improve their rust resistance.

[0046] The cooling water circulation system for the pressure rollers includes components such as valves, pipes, a pipe network, a temperature sensor 15, a flow sensor, and a water pump. For clearer identification, Figure 1 The graphic symbols are explained in the text.

[0047] Example 2

[0048] Example 2 includes the pressure roller cooling water circulation system described in Example 1, and the same parts will not be described again. This application provides a breathable membrane production line, including the aforementioned pressure roller cooling water circulation system, an extruder, and a casting machine; the pressure roller unit 40 is installed on both the extruder and the casting machine. This breathable membrane production line, after incorporating the pressure roller cooling water circulation system, will be more energy-efficient and effective.

[0049] In summary, the key design feature of this invention is that its cooling water unit 10 can generate cooling water; the ambient temperature water unit 50 supplies ambient temperature water; and both cooling water and ambient temperature water can enter the pressure roller module. During production, the cooling water cools the pressure roller module; during production switchover, the ambient temperature water cools the pressure roller module. This mode is more energy-efficient and economical.

[0050] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model without departing from the scope of the present utility model shall still fall within the scope of the present utility model.

Claims

1. A press roll cooling water circulation system characterized by: Includes a cooling water unit, a water storage tank unit, a pressure roller unit, and a normal temperature water unit; The cooling water unit includes a cooling tower and a chiller connected to the cooling tower; The water storage tank unit includes a cold water tank, a return water tank, and a filtration tank; the filtration tank is equipped with a filter element; the filtration tank is connected to the return water tank, and the water in the filtration tank can enter the return water tank. The first inlet of the chiller is connected to the return water tank, and the first outlet of the chiller is connected to the chilled water tank. The pressure roller unit includes a pressure roller module; The inlet of the pressure roller module is connected to the cold water tank; the ambient temperature water unit includes an ambient temperature water tank; the first outlet of the ambient temperature water tank is connected to the inlet of the pressure roller module, and the outlet of the pressure roller module is connected to the ambient temperature water tank and the filter tank.

2. The press roll cooling water circulation system of claim 1, wherein: The cold water tank is connected to the water supply unit; the water supply unit includes a filter and a water softener connected to the filter; the outlet of the water softener is connected to the cold water tank.

3. The press roll cooling water circulation system of claim 2, wherein: The water softener is connected to the ambient temperature water tank, and the water softener can input soft water into the ambient temperature water tank.

4. The press roll cooling water circulation system of claim 1, wherein: The filter element includes a filter cotton layer and a charcoal layer, with the filter cotton on top of the charcoal; the gaps between the upper and lower charcoal layers are staggered.

5. The press roll cooling water circulation system of claim 4, wherein: The charcoal layer has two layers; the diameter of the charcoal in the upper layer is smaller than that in the lower layer.

6. The press roll cooling water circulation system of claim 1, wherein: A third pipe and a fourth pipe are connected between the chiller and the cooling tower; a temperature sensor and a first water pump are installed on the third pipe.

7. The press roll cooling water circulation system of claim 1, wherein: The pressure roller module includes a first pressure roller module and a second pressure roller module; The first pressure roller module includes an extrusion rubber roller, an extrusion steel roller, an auxiliary steel roller, and a cooling steel roller; the extrusion rubber roller and the extrusion steel roller are pressed together; the auxiliary steel roller is pressed together; and the cooling steel roller is pressed together. The second pressure roller module includes stretching steel rollers, with adjacent stretching steel rollers pressed together; The inlet and outlet of the extrusion rubber roller, extrusion steel roller, auxiliary steel roller, cooling steel roller, and stretching steel roller are all equipped with flow regulating valves and pressure gauges.

8. The cooling water circulating system of the press roll according to claim 1 or 7, characterized in that: The cold water tank is sequentially connected to a primary water inlet network and a secondary water inlet network. The inlets of the first and second pressure roller modules are connected to the corresponding secondary water inlet networks. The outlets of the first and second pressure roller modules are connected to the secondary water outlet network. The secondary water inlet network is connected to the return water network. The return water network is connected to the filter tank and the ambient temperature water tank. A return water unit is provided between the primary water inlet network and the return water network.

9. The press roll cooling water circulation system of claim 1, wherein: The cold water tank, return water tank, and filtration tank are all integrally welded stainless steel tanks; the ambient temperature water tank is also made of stainless steel.

10. A breathable membrane production line, characterized in that: The invention includes the pressure roller cooling water circulation system, extruder, and casting machine as described in any one of claims 1-9; the extruder and casting machine are each equipped with the pressure roller unit.

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