Cooling water circulating device for flat filament drawing process

Abstract

The utility model provides a cooling water circulating device for a flat filament drawing process, and belongs to the field of manufacturing of cooling equipment. The device comprises a cast film cooling water tank, a centrifugal pump, a purification tank, a storage tank, a mixing tank and a circulating pump, a circulating pipeline is arranged on the cast film cooling water tank, and the two ends of the circulating pipeline are located on the two sides of the cast film cooling water tank respectively; the centrifugal pump, the purification tank, the storage tank, the mixing tank and the circulating pump are sequentially mounted on the circulating pipeline. The device is very good in practicability, reasonable in structural arrangement and convenient to operate, cooling water is recycled for multiple times, waste of water resources is greatly reduced, the machining cost is reduced, and the effect is obvious.

Description

Technical Field

[0001] This utility model relates to cooling equipment manufacturing technology, and in particular to a cooling water circulation device for flat wire drawing process, belonging to the field of auxiliary equipment manufacturing technology for flat wire production. Background Technology

[0002] The largest application area for flat yarn is in the plastic weaving industry. The main raw materials for plastic flat yarn are polypropylene and high-density polyethylene, or a combination of both. The production process mainly involves: mixing the main raw materials with some auxiliary materials in a certain ratio using a high-speed mixer; then feeding the mixture to a screw for melting and plasticizing; extruding the molten and plasticized raw materials and auxiliary materials through an extruder at a fixed quantity and pressure, forming a cast film; cooling the cast film through a cooling water system; and then conveying it to a cutting machine; this process cuts the cooled cast film into uniformly wide filaments; stretching these filaments into flat yarns at a certain draw ratio is completed by a stretching device; the stretched flat yarns are then shaped by a sizing baking plate to eliminate internal stress and prevent shrinkage; finally, the prepared flat yarns are wound up.

[0003] Polypropylene is a crystalline polymer. The addition of different additives significantly affects the regularity of the molecular chains after polypropylene blending, thus affecting crystallinity and consequently the various properties of the prepared flat yarns, such as strength, transparency, and stiffness. Currently, the industry mainly focuses on the stretching process. Although this process can bring disordered polymer chains into a certain degree of oriented order, the initial cooling state of the cast film in actual production also affects crystallinity, but this influence is often overlooked by the industry. Currently, there is little optimization involved in this process; conventional natural water cooling, and some even use river water, are commonly used. As production progresses, the water temperature gradually rises, and with the increase of impurities, although some companies use circulation systems, they often simply discharge the water after a certain number of cycles based on practical experience.

[0004] With the increasing demands for packaging from various application fields, especially for the traditional plastic weaving manufacturing industry, it has become particularly important to improve the quality of products to meet market demands while reducing manufacturing costs in the production process, thereby enhancing the industry's competitiveness and playing a leading role in the technological progress of the entire plastic weaving industry.

[0005] Therefore, developing a temperature control and purification cooling circulation device for the plastic flat filament drawing process is particularly important. This circulation device can achieve the initial crystallization morphology of each polymer chain in the early stage of casting film, while controlling the temperature of cooling water to stabilize the casting film and ensure its uniformity. Moreover, the purification system can stabilize the water quality, ensuring the performance of the casting film while achieving multiple circulations of cooling water, saving water and reducing processing costs. Summary of the Invention

[0006] This invention provides a new cooling water circulation device for flat wire drawing process. By recycling the cooling water, water can be saved, thus solving the technical problem that cooling water cannot be circulated multiple times in the prior art.

[0007] The cooling water circulation device for the flat wire drawing process of this utility model includes: a casting film cooling water tank, a centrifugal pump, a purification tank, a storage tank, a mixing tank, and a circulation pump;

[0008] The casting film cooling water tank is equipped with a circulation pipeline, with its two ends located on both sides of the casting film cooling water tank; the centrifugal pump, the purification tank, the storage tank, the mixing tank and the circulation pump are installed sequentially on the circulation pipeline.

[0009] As described above, in the cooling water circulation device for the flat wire drawing process, a first temperature sensor and a second temperature sensor are respectively installed in the casting film cooling water tank; a first regulating valve and a second regulating valve are also respectively installed on the circulation pipeline.

[0010] The first regulating valve is located between the centrifugal pump and the purification tank, and the second regulating valve is located between the circulating pump and the cast film cooling water tank; the first temperature sensor is electrically connected to the first regulating valve, and the second temperature sensor is electrically connected to the second regulating valve.

[0011] In the flat wire drawing process cooling water circulation device described above, the first temperature sensor and the second temperature sensor are respectively located near the two ends of the casting film cooling water tank.

[0012] The cooling water circulation device for the flat wire drawing process described above includes a pressure-type agitator installed inside the purification tank.

[0013] In the cooling water circulation device for the flat wire drawing process described above, the bottom of the purification tank is connected to an impurity storage tank, and a valve is provided between the purification tank and the impurity storage tank.

[0014] In the flat wire drawing process cooling water circulation device described above, a filter is provided between the purification tank and the storage tank.

[0015] The cooling water circulation device for the flat wire drawing process described above further includes a controller; the first temperature sensor is electrically connected to the first regulating valve through the controller, and the second temperature sensor is electrically connected to the second regulating valve through the controller.

[0016] In the flat wire drawing process cooling water circulation device described above, both the centrifugal pump and the circulation pump are electrically connected to the controller.

[0017] This utility model has a reasonable structure and is easy to operate. It achieves stable temperature control through the interlocking of temperature sensors and regulating valves, ensuring uniform cooling of the cast film. The purification tank with downward stirring is set to separate impurities from the cooling water. The purified water is returned to the cooling system, realizing multiple recycling of cooling water, greatly reducing water waste and processing costs. It is highly practical. Attached Figure Description

[0018] Figure 1 This is a system structure diagram of the cooling water circulation device for the flat wire drawing process according to an embodiment of the present invention. Detailed Implementation

[0019] The cooling water circulation device for the flat wire drawing process described in this utility model can be made of the following materials and components, but is not limited to them, such as: circulating water pump, centrifugal pump, temperature sensor, regulating valve, etc.

[0020] like Figure 1 The diagram shown is a system structure diagram of the cooling water circulation device for the flat wire drawing process according to an embodiment of the present invention. The cooling water circulation device for the flat wire drawing process according to an embodiment of the present invention includes: a casting film cooling water tank 1, a centrifugal pump 2, a purification tank 3, a storage tank 4, a mixing tank 5, and a circulation pump 6.

[0021] The casting film cooling water tank 1 is provided with a circulation pipeline, with its two ends located on both sides of the casting film cooling water tank 1; the centrifugal pump 2, the purification tank 3, the storage tank 4, the mixing tank 5 and the circulation pump 6 are installed sequentially on the circulation pipeline.

[0022] Normally, a first temperature sensor 11 and a second temperature sensor 12 are installed in the casting film cooling water tank 1; a first regulating valve 21 and a second regulating valve 22 are also installed on the circulation pipeline.

[0023] The first regulating valve 21 is located between the centrifugal pump 2 and the purification tank 3, and the second regulating valve 22 is located between the circulating pump 6 and the casting film cooling water tank 1; the first temperature sensor 11 is electrically connected to the first regulating valve 22, and the second temperature sensor 12 is electrically connected to the second regulating valve 22.

[0024] Normally, the first temperature sensor 11 and the second temperature sensor 12 are respectively located near the two ends of the cast film cooling water tank 1.

[0025] This embodiment utilizes multiple temperature sensors to measure the water temperature of the casting film cooling water tank in real time, and sends a portion of the water in the cooling water tank that has increased in temperature to a purification tank. After purification and impurity removal, the cooling water is then fully mixed with low-temperature cooling water in a mixing tank. The mixed low-temperature cooling water is then used to compensate the casting film cooling water tank for low-temperature cooling water, thereby achieving cooling water circulation and purification.

[0026] This embodiment sets up a temperature sensor and interlocks it with the regulating valve for supplying low-temperature cooling water to control the opening of the corresponding regulating valve, thereby controlling the flow rate of cooling water at different temperatures. Ultimately, it achieves stability of the cooling water temperature in the entire cast film cooling water tank. The flow rate of the two regulating valves, a cascade low-temperature cooling water regulating valve and a high-temperature cooling water outlet regulating valve, is used to ensure that the cooling water level in the cast film cooling water tank remains stable.

[0027] In the cooling water circulation device for the flat wire drawing process of this embodiment, a pressure-type agitator 30 is provided inside the purification tank 3.

[0028] Furthermore, the bottom of the purification tank 2 is connected to an impurity storage tank 32, and a valve 31 is provided between the purification tank 3 and the impurity storage tank 32. The pressure-type agitator 30 forces impurities in the water into the impurity storage tank 32. If the impurities reach a certain amount, the valve 31 between the purification tank 3 and the impurity storage tank 32 can be closed, and then the impurities can be discharged from the bottom of the impurity storage tank 32, thereby purifying the cooling water.

[0029] In actual use, a filter 33 is provided between the purification tank 3 and the storage tank 4.

[0030] The cooling water circulation device for the flat wire drawing process in this embodiment also includes a controller; the first temperature sensor 11 is electrically connected to the first regulating valve 21 through the controller, and the second temperature sensor 12 is electrically connected to the second regulating valve 22 through the controller.

[0031] Similarly, both the centrifugal pump 2 and the circulating pump 6 are electrically connected to the controller.

[0032] This utility model has a reasonable structure and is easy to operate. It achieves stable temperature control through the interlocking of temperature sensors and regulating valves, ensuring uniform cooling of the cast film. The purification tank with downward stirring is set to separate impurities from the cooling water. The purified water is returned to the cooling system, realizing multiple recycling of cooling water, greatly reducing water waste and processing costs. It is highly practical.

[0033] The working process of the cooling water circulation device for the flat wire drawing process in this embodiment of the utility model is as follows:

[0034] The first temperature sensor 11 and the second temperature sensor 12 both measure the water temperature of the casting film cooling water tank 1 in real time. The centrifugal pump 2 delivers part of the water in the casting film cooling water tank 1 with the increased temperature to the purification tank 4 with the pressure-type agitator 30 through the first regulating valve 21. The pressure-type agitator 30 pushes the impurities in the water into the impurity storage tank 32. If the impurities reach a certain amount, the valve 31 between the purification tank 3 and the impurity storage tank 32 can be closed, and then the impurities are discharged from the bottom of the impurity storage tank 32.

[0035] The purified water can then pass through a connecting pipe equipped with filter 33 into storage tank 4. The purified cooling water then enters mixing tank 5, where it is thoroughly mixed with low-temperature cooling water. The purified cooling water is then pumped through circulation pump 6 and replenished by second regulating valve 22 to the casting film cooling water tank 1, achieving cooling water circulation and purification. Simultaneously, a first temperature sensor 11 is interlocked with the first regulating valve 21. The opening of the first regulating valve 21 is controlled based on the temperature change of the first temperature sensor 11, thereby controlling the flow rate of the low-temperature cooling water. Similarly, a second temperature sensor 12 is interlocked with the second regulating valve 22. The opening of the second regulating valve 22 is controlled based on the temperature change of the second temperature sensor 12, thereby controlling the flow rate of the high-temperature cooling water. This ensures stable cooling water temperature throughout the casting film cooling water tank 1 and cascades the flow rates of the first and second regulating valves 21 and 22 to ensure a stable cooling water level in the casting film cooling water tank 1.

[0036] This invention offers significant advantages: it features a reasonable structure and convenient operation. The temperature control is stable through the interlocking of temperature sensors and regulating valves, ensuring uniform cooling of the cast film. The purification tank with downward stirring separates impurities from the cooling water, allowing the purified water to be returned to the cooling system, thus enabling multiple cycles of cooling water recycling. This greatly reduces water waste and processing costs, making it highly practical.

[0037] The sequence numbers of the above-described embodiments of this utility model are merely for descriptive purposes and do not represent the superiority or inferiority of the embodiments. Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of some modifications and the superposition of necessary general technologies; of course, they can also be implemented by simplifying some important technical features. Based on this understanding, the technical solution of this utility model, in essence or in other words, the part that contributes to the prior art, is: the overall structure and connection method, and the structure described in the various embodiments of this utility model.

[0038] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A cooling water circulation device for a flat wire drawing process, characterized in that, include: Cast film cooling water tank, centrifugal pump, purification tank, storage tank, mixing tank and circulation pump; The casting film cooling water tank is equipped with a circulation pipeline, with its two ends located on both sides of the casting film cooling water tank; the centrifugal pump, the purification tank, the storage tank, the mixing tank, and the circulation pump are sequentially installed on the circulation pipeline; The casting film cooling water tank is equipped with a first temperature sensor and a second temperature sensor; the circulation pipeline is also equipped with a first regulating valve and a second regulating valve. The first regulating valve is located between the centrifugal pump and the purification tank, and the second regulating valve is located between the circulating pump and the cast film cooling water tank; the first temperature sensor is electrically connected to the first regulating valve, and the second temperature sensor is electrically connected to the second regulating valve.

2. The cooling water circulation device for the flat wire drawing process according to claim 1, characterized in that, The first temperature sensor and the second temperature sensor are respectively located near the two ends of the cast film cooling water tank.

3. The cooling water circulation device for the flat wire drawing process according to claim 1, characterized in that, The purification tank is equipped with a pressure-type agitator.

4. The cooling water circulation device for the flat wire drawing process according to claim 3, characterized in that, The bottom of the purification tank is connected to an impurity storage tank, and a valve is provided between the purification tank and the impurity storage tank.

5. The cooling water circulation device for the flat wire drawing process according to claim 3, characterized in that, A filter is installed between the purification tank and the storage tank.

6. The cooling water circulation device for the flat wire drawing process according to claim 1, characterized in that, The cooling water circulation device for the flat wire drawing process also includes a controller; the first temperature sensor is electrically connected to the first regulating valve through the controller, and the second temperature sensor is electrically connected to the second regulating valve through the controller.

7. The cooling water circulation device for the flat wire drawing process according to claim 6, characterized in that, Both the centrifugal pump and the circulating pump are electrically connected to the controller.

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