Energy efficient cooling tank for cable extrusion process

Abstract

The utility model discloses an energy -conserving cooling water tank for cable extrusion technology, including the tank body, the tank body inside is equipped with high temperature precooling area, initiative cooling area and constant temperature stable area from import to export in proper order, is equipped with the coil -type heat exchanger in initiative cooling area, and the coil -type heat exchanger is connected with refrigerating unit, is equipped with water temperature heater in constant temperature stable area, the tank body outside is fixed with heat exchanger and circulating water pump, the tank body bottom interval is equipped with a plurality of guide roller for supporting and guiding cable line and advancing in the water tank, the utility model discloses a heat exchanger and circulating water pump are set up, and the most part heat that cable cooling process releases to the water is effectively recovered, and the overall energy consumption of production line is reduced greatly, and high temperature precooling area utilizes the waste heat and carries out the preliminary cooling, avoids the " quenching " effect of cable, and the temperature tends to uniform stability through heating control before the cable is out of the water tank in constant temperature stable area, improves the crystallization uniformity and surface finish of insulating layer.

Description

Technical Field

[0001] This utility model relates to the technical field of cooling water tank devices, specifically to an energy-saving cooling water tank used in cable extrusion processes. Background Technology

[0002] In the wire and cable manufacturing industry, extrusion is a crucial process for uniformly coating a conductor with molten plastic to form insulation or a sheath. Cables emerging from the extruder are extremely hot (typically reaching 180-250℃) and must be cooled and set immediately; otherwise, problems such as uneven plastic crystallinity, rough surface, and decreased mechanical properties will occur. Currently, the commonly used cooling method is to pass the cable through one or more cooling water tanks connected in series.

[0003] Traditional cooling water tanks typically use ambient temperature water for direct cooling, maintaining the water temperature through large overflows or cooling towers. This method has significant drawbacks: First, the sudden contact of high-temperature cables with low-temperature water creates a large temperature difference between the inside and outside, which can easily lead to internal stress and micropores within the insulation layer due to rapid cooling ("quenching" effect), affecting product quality. Second, the heat absorbed by the cooling water is directly dissipated into the atmosphere through the cooling tower, resulting in wasted energy, especially in winter when the increased ambient temperature in the workshop also increases air conditioning energy consumption. Finally, to ensure cooling effectiveness, a large amount of cold water needs to be continuously replenished and hot water discharged, resulting in huge water resource consumption. Therefore, developing an energy-saving cooling water tank that can both ensure cable cooling quality and significantly reduce energy and water consumption is of significant practical importance. Utility Model Content

[0004] (I) Technical Issues

[0005] This utility model provides an energy-saving cooling water tank for cable extrusion process, which solves the problems of traditional cooling water tanks, such as easy "quenching" effect affecting cable quality, heat waste leading to high energy consumption, and large water consumption due to open overflow. It achieves the effects of recovering cooling waste heat, adopting three-stage progressive cooling to improve cable quality, and significantly saving water and energy.

[0006] (II) Technical Content

[0007] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows: an energy-saving cooling water tank for cable extrusion process, comprising a tank body, wherein the tank body is a long strip-shaped water tank filled with cooling water, and its two ends are respectively provided with an inlet and an outlet for cable to pass through. The inside of the tank body is provided with a high-temperature precooling zone, an active cooling zone and a constant temperature stabilization zone from the inlet to the outlet. A coil heat exchanger is provided in the active cooling zone, and a refrigeration unit is connected to the coil heat exchanger. A water heater is provided in the constant temperature stabilization zone. A heat exchanger and a circulating water pump are fixedly provided on the outside of the tank body. The water inlet of the heat exchanger is connected to the active cooling zone through the circulating water pump, and its water outlet is connected to the high-temperature precooling zone. Multiple guide rollers for supporting and guiding the cable to advance in the water tank are provided at intervals at the bottom of the tank body.

[0008] Furthermore, the high-temperature precooling zone, the active cooling zone, and the constant-temperature stabilization zone are separated by a slotted partition, which allows cables to pass through and enables cooling water to flow slowly between the zones.

[0009] Furthermore, the active cooling zone is equipped with a first temperature sensor, the constant temperature stabilization zone is equipped with a second temperature sensor, and the system also includes a control cabinet. The first temperature sensor, the second temperature sensor, the water heater, and the refrigeration unit are all electrically connected to the control cabinet.

[0010] Furthermore, the heat exchanger is a plate heat exchanger.

[0011] Furthermore, the water heater is an electric heating plate.

[0012] Furthermore, the guide roller is made of polyurethane or nylon material, and its surface is provided with U-grooves to prevent cable deflection.

[0013] (III) Technical Effects

[0014] The advantages of this utility model compared with the prior art are as follows:

[0015] 1. By setting up heat exchangers and circulating water pumps, most of the heat released into the water during the cable cooling process is effectively recovered and supplied to other heat-requiring links, such as preheating raw materials, domestic water, and winter heating, through plate heat exchangers, which greatly reduces the overall energy consumption of the production line.

[0016] 2. A three-stage progressive cooling mode of "high-temperature pre-cooling - active forced cooling - constant temperature stabilization" is adopted. The high-temperature pre-cooling zone uses residual heat for initial cooling, avoiding the "quenching" effect of the cable; the constant temperature stabilization zone uses heating control to make the cable temperature tend to be uniform and stable before exiting the water tank, effectively reducing internal stress and improving the crystallization uniformity and surface smoothness of the insulation layer.

[0017] 3. Because heat is effectively recovered, the cooling water system mainly circulates internally, requiring only a small amount of water lost due to evaporation and leakage to be replenished. Compared with traditional open overflow tanks, it can save more than 80% of cooling water, meeting the requirements of green manufacturing. Attached Figure Description

[0018] Figure 1 This is a three-dimensional structural diagram of the energy-saving cooling water tank for cable extrusion process according to this utility model. Figure 1 .

[0019] Figure 2 This is a three-dimensional structural diagram of the energy-saving cooling water tank for cable extrusion process according to this utility model. Figure 2 .

[0020] Figure 3 This is a schematic diagram of the main structure of the energy-saving cooling water tank used in the cable extrusion process of this utility model.

[0021] Figure 4 This is a top view schematic diagram of the energy-saving cooling water tank used in the cable extrusion process of this utility model.

[0022] As shown in the figure: 1. Tank; 2. Guide roller; 3. High-temperature precooling zone; 4. Active cooling zone; 5. Coil heat exchanger; 6. Refrigeration unit; 7. Constant temperature stabilization zone; 8. Water heater; 9. Heat exchanger; 10. Circulating water pump; 11. First temperature sensor; 12. Second temperature sensor; 13. Partition plate; 14. Control cabinet. Detailed Implementation

[0023] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", "center", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation structure and operation. Therefore, they should not be construed as limitations on this utility model.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided with," "installed," "connected," "linked," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0025] The present invention will now be described in further detail with reference to the accompanying drawings.

[0026] Combined with appendix Figure 1 To be continued Figure 4 An energy-saving cooling water tank for cable extrusion processes includes a tank body 1, which is a long, narrow tank filled with cooling water. Inlet and outlet for cable passage are located at both ends of the tank body 1. Inside the tank body 1, from the inlet to the outlet, are sequentially arranged a high-temperature pre-cooling zone 3, an active cooling zone 4, and a constant-temperature stabilization zone 7. A coiled heat exchanger 5 is installed in the active cooling zone 4, and a refrigeration unit 6 is connected to the coiled heat exchanger 5. A water heater 8 is installed in the constant-temperature stabilization zone 7. A heat exchanger 9 and a circulating water pump 10 are fixedly installed outside the tank body 1. The inlet of the heat exchanger 9 is connected to the active cooling zone 4 via the circulating water pump 10, and its outlet is connected to the high-temperature pre-cooling zone 3. Multiple guide rollers 2 are spaced apart at the bottom of the tank body 1 to support and guide the cable as it moves through the tank.

[0027] The high-temperature precooling zone 3, the active cooling zone 4, and the constant-temperature stabilization zone 7 are separated by a perforated partition 13, which allows cables to pass through and enables cooling water to flow slowly between the zones. The active cooling zone 4 is equipped with a first temperature sensor 11, and the constant-temperature stabilization zone 7 is equipped with a second temperature sensor 12. The system also includes a control cabinet 14, with the first temperature sensor 11, the second temperature sensor 12, the water heater 8, and the refrigeration unit 6 all electrically connected to the control cabinet 14.

[0028] The heat exchanger 9 is a plate heat exchanger, the water heater 8 is an electric heating plate, and the guide roller 2 is made of polyurethane or nylon material, with a U-groove on its surface to prevent cable deflection.

[0029] The working principle of this utility model is as follows: First, the tank 1 containing cooling water is adjusted to the initial working state. The control cabinet 14 establishes electrical connections with the first temperature sensor 11, the second temperature sensor 12, the water heater 8, and the refrigeration unit 6 to achieve real-time monitoring and control. When the cable comes out of the extruder head, it first enters the high-temperature pre-cooling zone 3 from the inlet of the tank 1. In this zone, the high-temperature heat carried by the cable is transferred to the cooling water, initially reducing the cable temperature and avoiding the subsequent "quenching" effect. At the same time, the circulating water pump 10 outside the tank 1 starts, transporting the cooling water that has absorbed heat in the active cooling zone 4 to the heat exchanger 9. The cooling water connected to the heat exchanger exchanges heat with the external cooling water. The heat exchanger 9 transfers the recovered heat to the external heat-requiring links (such as preheating raw materials, domestic water, etc.) to complete the waste heat recovery. After the heat exchange, the cooling water at the outlet of the heat exchanger 9 flows back to the high-temperature pre-cooling zone 3, realizing the recycling of cooling water in this loop.

[0030] Next, the cable, after being pre-cooled by high temperature, passes through the slotted partition 13 between the high-temperature pre-cooling zone 3 and the active cooling zone 4 and enters the active cooling zone 4. At this time, the first temperature sensor 11 detects the water temperature in the active cooling zone 4 in real time and transmits the data to the control cabinet 14. If the water temperature is higher than the set value, the control cabinet 14 controls the refrigeration unit 6 to start. The refrigeration unit 6 and the coil heat exchanger 5 in the active cooling zone 4 work together to cool the cooling water in the active cooling zone 4. The cable temperature is further reduced through active forced cooling to ensure that the cable temperature reaches the expected cooling effect.

[0031] Then, the cable continues to pass through the slotted partition 13 between the active cooling zone 4 and the constant temperature stabilization zone 7 and enters the constant temperature stabilization zone 7. The second temperature sensor 12 detects the water temperature in the constant temperature stabilization zone 7 in real time and transmits the data to the control cabinet 14. If the water temperature is lower than the set value, the control cabinet 14 controls the water heater 8 in the constant temperature stabilization zone 7 to start, heating the cooling water to keep the water temperature in the constant temperature stabilization zone 7 within the set range, so that the cable temperature in this area tends to be uniform and stable, reducing internal stress and improving the uniformity of insulation layer crystallization and surface smoothness. Finally, the cable exits from the outlet of the tank 1, completing the cooling process. During the entire cooling process, multiple guide rollers 2 spaced at the bottom of the tank 1 support and guide the cable, ensuring that the cable moves stably in the water tank. Since the heat is effectively recovered by the heat exchanger 9, the cooling water mainly circulates inside the tank 1, and only a small amount of water lost due to evaporation and leakage needs to be replenished.

[0032] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. An energy-saving cooling water tank for cable extrusion process, comprising a tank body (1), wherein the tank body (1) is a long strip-shaped water tank filled with cooling water, and its two ends are respectively provided with an inlet and an outlet for cable to pass through, characterized in that: The tank (1) is provided with a high-temperature precooling zone (3), an active cooling zone (4) and a constant temperature stabilization zone (7) in sequence from the inlet to the outlet. The active cooling zone (4) is provided with a coil heat exchanger (5), and the coil heat exchanger (5) is connected to a refrigeration unit (6). The constant temperature stabilization zone (7) is provided with a water heater (8). The tank (1) is fixedly equipped with a heat exchanger (9) and a circulating water pump (10); the water inlet of the heat exchanger (9) is connected to the active cooling zone (4) through the circulating water pump (10) and its water outlet is connected to the high temperature pre-cooling zone (3); the bottom of the tank (1) is provided with a plurality of guide rollers (2) for supporting and guiding the cable to move forward in the tank.

2. The energy-saving cooling water tank for cable extrusion process according to claim 1, characterized in that: The high-temperature precooling zone (3), the active cooling zone (4), and the constant temperature stabilization zone (7) are separated by a slotted partition (13) through which cables pass and cooling water flows slowly between the zones.

3. The energy-saving cooling water tank for cable extrusion process according to claim 1, characterized in that: The active cooling zone (4) is equipped with a first temperature sensor (11), the constant temperature stabilization zone (7) is equipped with a second temperature sensor (12), and the control cabinet (14) is also included. The first temperature sensor (11), the second temperature sensor (12), the water heater (8) and the refrigeration unit (6) are all electrically connected to the control cabinet (14).

4. The energy-saving cooling water tank for cable extrusion process according to claim 1, characterized in that: The heat exchanger (9) is a plate heat exchanger.

5. The energy-saving cooling water tank for cable extrusion process according to claim 1, characterized in that: The water heater (8) is an electric heating plate.

6. The energy-saving cooling water tank for cable extrusion process according to claim 1, characterized in that: The guide roller (2) is made of polyurethane or nylon material and has a U-groove on its surface to prevent cable deflection.

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