Cooling device and cable production equipment

Abstract

The utility model relates to the technical field of cables, in particular to a cooling device and cable production equipment, which comprises a first cooling tank, a second cooling tank and a third cooling tank, the first cooling tank is used for accommodating first cooling liquid, the second cooling tank is communicated with the first cooling tank, the second cooling tank is used for accommodating second cooling liquid, and the third cooling tank is communicated with the second cooling liquid. The third cooling tank is communicated with the second cooling tank, the third cooling tank is used for containing third cooling liquid, and the length L1 of the first cooling tank, the length L2 of the second cooling tank and the length L3 of the third cooling tank meet the relational expression that L1 < L2 < L3; the temperature T1 of the first cooling liquid, the temperature T2 of the second cooling liquid and the temperature T3 of the third cooling liquid meet the relational expression, and T2 is larger than T3 and smaller than T1. According to the cooling device and the cable production equipment, the water resistance of the cable is effectively improved, and the high product quality is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of cables, in particular to a cooling device and cable production equipment. Background Art

[0002] Umbilical cables are used in deepwater oil and gas exploration and development, connecting offshore platforms to equipment such as oil and gas wells on the seabed to transmit power. Due to the high sea pressure in deepwater, umbilical cables must meet stringent water-resistance requirements to ensure they can function properly in this high-pressure environment and prevent water infiltration.

[0003] Generally speaking, an umbilical cable consists of an insulation layer and a conductor located within the insulation layer. Research has shown that the insulation layer is closely related to the overall water resistance of the cable. During the umbilical cable production process, after the insulation layer is applied to the conductor, the cable needs to be cooled using a cooling device.

[0004] However, when existing cooling devices cool extruded cables, the insulation layer located on the outside along the radial direction of the cable cools rapidly due to contact with the coolant, while the insulation layer located on the inside is not fully cooled due to its relative distance from the coolant. This results in a loose seal between the insulation layer and the internal conductor, and tiny cracks or holes in the insulation layer, resulting in poor water resistance of the cable and product quality failing to meet production requirements. Summary of the Invention

[0005] To this end, the technical problem to be solved by the present invention is to overcome the poor water resistance of the cable cooled by the existing cooling device and the inability of the product quality to meet production requirements, and to provide a cooling device and cable production equipment to effectively improve the water resistance of the cable and ensure high product quality.

[0006] In a first aspect, the utility model provides a cooling device, comprising a first cooling trough, which is used to accommodate a first coolant; a second cooling trough, which is connected to the first cooling trough and is used to accommodate a second coolant; and a third cooling trough, which is connected to the second cooling trough and is used to accommodate a third coolant; wherein the length L1 of the first cooling trough, the length L2 of the second cooling trough and the length L3 of the third cooling trough satisfy the relationship, L1<L2<L3; the temperature T1 of the first coolant, the temperature T2 of the second coolant and the temperature T3 of the third coolant satisfy the relationship, T3<T2<T1.

[0007] In one embodiment of the present invention, the first temperature control component is further included, and the first temperature control component includes a first temperature control box, a first heater and a first pump body. The first temperature control box is respectively connected to the first cooling tank and the second cooling tank. The first temperature control box is provided with a first liquid outlet. The first heater is arranged in the first temperature control box. The first heater is used to heat the coolant in the first temperature control box. The first cooling tank is sequentially provided with a plurality of first liquid return holes along its own length direction. The first pump body is respectively connected to the first liquid outlet and the first liquid return hole, so as to transport the coolant in the first temperature control box to the first cooling tank through the first pump body. The first cooling tank; or / and the second temperature control component, the second temperature control component includes a second temperature control box, a second heater and a second pump body, the second temperature control box is respectively connected to the second cooling tank and the third cooling tank, the second temperature control box is provided with a second liquid outlet, the second heater is arranged in the second temperature control box, the second heater is used to heat the coolant in the second temperature control box, the second cooling tank is sequentially provided with a plurality of second return liquid holes along its own length direction, the second pump body is respectively connected to the second liquid outlet and the second return liquid hole, so as to transport the coolant in the second temperature control box to the second cooling tank through the second pump body.

[0008] In one embodiment of the present invention, the discharge end of the first cooling trough at least partially extends into the first temperature-controlled box, and the feed end of the second cooling trough at least partially extends into the first temperature-controlled box; the discharge end of the second cooling trough at least partially extends into the second temperature-controlled box, and the feed end of the third cooling trough at least partially extends into the second temperature-controlled box.

[0009] In one embodiment of the present invention, the third cooling groove is provided with a plurality of third liquid return holes and a third liquid outlet hole in sequence along its own length direction; the cooling device also includes a third temperature control component, which is respectively connected to the third liquid return hole and the third liquid outlet hole, and the third temperature control component is used to cool the third coolant.

[0010] In one embodiment of the present invention, the length L1 of the first cooling trough satisfies the relationship: 3.5m≤L1≤4.5m, the length L2 of the second cooling trough satisfies the relationship: 7.5m≤L2≤8.5m, and the length L3 of the third cooling trough satisfies the relationship: 11.5m≤L3≤12.5m.

[0011] In one embodiment of the present invention, the temperature T1 of the first coolant satisfies the relationship, 75°C ≤ T1 ≤ 80°C, the temperature T2 of the second coolant satisfies the relationship, 70°C ≤ T2 ≤ 75°C, the temperature T3 of the third coolant satisfies the relationship, 20°C ≤ T3 ≤ 30°C, and T1 ≠ T2.

[0012] In one embodiment of the present invention, it also includes a first temperature sensor, which is arranged in the middle area of the first cooling groove along the length direction of the first cooling groove, and the first temperature sensor is used to detect the temperature of the first temperature sensor; a second temperature sensor, which is arranged in the middle area of the second cooling groove along the length direction of the second cooling groove, and the second temperature sensor is used to detect the temperature of the second temperature sensor; and a third temperature sensor, which is arranged in the middle area of the third cooling groove along the length direction of the third cooling groove, and the third temperature sensor is used to detect the temperature of the third temperature sensor.

[0013] In the second aspect, the utility model also provides a cable production equipment, including an extrusion die and a cooling device described in any one of the above items; the extrusion die is hollow along the axial direction, and forms an assembly area, an intersection area and a sizing area that are connected in sequence; the inner wall surface of the assembly area is inclined, and the discharge end diameter of the assembly area is smaller than the feed end diameter of the assembly area; the intersection area includes a first intersection section and a second intersection section, the diameter of the first intersection section is equal to the discharge end diameter of the assembly area, the inner wall surface of the second intersection section is inclined, and the discharge end diameter of the second intersection section is smaller than the feed end diameter of the second intersection section; the diameter of the sizing zone is equal to the feed end diameter of the second intersection section.

[0014] In one embodiment of the present invention, the length l1 of the sizing zone satisfies the relationship: 1.5 mm ≤ l1 ≤ 2.5 mm.

[0015] In one embodiment of the present invention, a detector is further included. The detector is arranged at the discharge end of the third cooling trough, and the detector is used to detect data information of the cable discharged from the discharge end of the third cooling trough.

[0016] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0017] The cooling device described in the present invention achieves cooling of the cable by setting a first cooling trough, a second cooling trough, and a third cooling trough of different lengths, and setting coolants of different temperatures therein. On the one hand, by setting a three-stage cooling trough and controlling the temperature of the coolant in each cooling trough, the temperature of each coolant is gradually reduced, and the temperature change during the cooling process is more moderate, avoiding excessive temperature differences in a short period of time, and ensuring a good cooling effect of the device. On the other hand, combined with the control of the length of the cooling trough, the cable can be cooled more fully under the premise of an appropriate cooling temperature, effectively avoiding the phenomenon of loose sealing between the insulation layer of the cable and the internal conductor, or cracks and holes in the insulation layer, thereby improving the water resistance of the cable and ensuring high product quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to make the content of the utility model easier to understand, the utility model is further described in detail below based on the specific embodiments of the utility model in conjunction with the accompanying drawings, wherein:

[0019] Figure 1 This is a schematic diagram of the partial structure of the cooling device from a first perspective in a preferred embodiment of the present invention;

[0020] Figure 2 This is a partial structural diagram of the cooling device from a second perspective in a preferred embodiment of the present invention;

[0021] Figure 3 This is a schematic diagram of the partial structure of the cable production equipment in the preferred embodiment of the present utility model;

[0022] Figure 4 It is a cross-sectional view of the extrusion die in the preferred embodiment of the present utility model.

[0023] Explanation of the reference numerals in the specification: 10. First cooling trough; 11. First liquid return hole; 12. First temperature sensor; 20. Second cooling trough; 21. Second liquid return hole; 22. Second temperature sensor; 30. Third cooling trough; 31. Third liquid return hole; 32. Third liquid outlet hole; 33. Third temperature sensor; 41. First temperature control box; 411. First liquid outlet hole; 42. First heater; 43. First pump body; 51. Second temperature control box; 511. Second liquid outlet hole; 52. Second heater; 53. Second pump body; 60. Third temperature control component; 70. Extrusion die; 71. Assembly area; 72. Intersection area; 721. First intersection section; 722. Second intersection section; 73. Sizing area; 80. Detector. DETAILED DESCRIPTION

[0024] The present invention will be further described below with reference to the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it. However, the embodiments are not intended to limit the present invention.

[0025] Reference Figure 1 As shown, the utility model discloses a cooling device, which includes a first cooling trough 10 , a second cooling trough 20 and a third cooling trough 30 .

[0026] The first cooling tank 10 is used to contain the first coolant. The second cooling tank 20 is connected to the first cooling tank 10; preferably, the feed end of the second cooling tank 20 is connected to the discharge end of the first cooling tank 10. The second cooling tank 20 is used to contain the second coolant. The third cooling tank 30 is connected to the second cooling tank 20; preferably, the feed end of the third cooling tank 30 is connected to the discharge end of the second cooling tank 20. The third cooling tank 30 is used to contain the third coolant. Those skilled in the art can set the corresponding coolants according to actual requirements; preferably, each coolant is set as water.

[0027] Among them, the length L1 of the first cooling tank 10, the length L2 of the second cooling tank 20, and the length L3 of the third cooling tank 30 satisfy the relationship L1 < L2 < L3. At the same time, the temperature T1 of the first coolant, the temperature T2 of the second coolant, and the temperature T3 of the third coolant satisfy the relationship T3 < T2 < T1. It can be imagined that to achieve cooling, the temperature T1 of the first coolant is lower than the temperature of the cable surface.

[0028] On the premise of meeting the length requirements, those skilled in the art can set the shapes of each cooling tank according to actual requirements. Preferably, take a plane perpendicular to the length direction of the corresponding cooling tank, and intercept the corresponding cooling tank with this plane. The cross-sectional shape of the cooling tank is set as a structure similar to a "U" shape to contain the coolant. Preferably, components such as rollers can be set in the cooling tank to facilitate the passing of the cable.

[0029] During actual use, when the cable is extruded, it is pulled into the first cooling tank 10. Keep pulling the cable so that the cable flows through the first cooling tank 10 with a length of L1, the second cooling tank 20 with a length of L2, and the third cooling tank 30 with a length of L3 in sequence. In the first cooling tank 10, the cable is cooled by the first coolant with a temperature of T1; in the second cooling tank 20, the cable is cooled by the second coolant with a temperature of T2; in the third cooling tank 30, the cable is cooled by the third coolant with a temperature of T3. On the one hand, by setting a three-stage cooling tank and controlling the temperature of the coolant in each cooling tank, the temperature of each coolant is gradually reduced, the temperature change during the cooling process is more gentle, avoiding excessive temperature difference in a short time, and ensuring a good cooling effect of the device. On the other hand, combined with the control of the length of the cooling tank, it can make the cable be cooled more sufficiently on the premise of suitable cooling temperature, effectively avoiding the phenomena of poor sealing between the insulating layer and the internal conductor of the cable, or cracks and holes appearing on the insulating layer, thereby improving the water resistance of the cable and ensuring high quality of the product.

[0030] The cooling device described in the present invention achieves cooling of the cable by setting a first cooling trough 10, a second cooling trough 20, and a third cooling trough 30 of different lengths, and setting coolants of different temperatures therein. On the one hand, by setting a three-stage cooling trough and controlling the temperature of the coolant in each cooling trough, the temperature of each coolant is gradually reduced, and the temperature change during the cooling process is more moderate, avoiding excessive temperature differences in a short period of time, and ensuring a good cooling effect of the device. On the other hand, combined with the control of the length of the cooling trough, the cable can be cooled more fully under the premise of an appropriate cooling temperature, effectively avoiding the phenomenon of loose sealing between the insulation layer of the cable and the internal conductor, or cracks and holes in the insulation layer, thereby improving the water resistance of the cable and ensuring high product quality.

[0031] Reference Figure 1 、 Figure 2 and Figure 3 As shown, the cooling device described in the present invention, in some embodiments, further includes a first temperature control component and a second temperature control component.

[0032] Specifically, the first temperature-control component includes a first temperature-control box 41, a first heater 42, and a first pump body 43. The first temperature-control box 41 is used to contain coolant. On the one hand, the first temperature-control box 41 is connected to the first cooling tank 10, so that the first coolant in the first cooling tank 10 can flow into the first temperature-control box 41 and be heated, thereby maintaining the temperature of the first coolant within a suitable range and achieving initial cooling of the cable. On the other hand, the first temperature-control box 41 is also connected to the second cooling tank 20, so that the cable that has been initially cooled can enter the second cooling tank 20 for further cooling.

[0033] The first temperature-control box 41 is provided with a first liquid outlet 411 to cooperate with the first pump body 43 to circulate the coolant. A first heater 42 is disposed within the first temperature-control box 41 and is used to heat the coolant within the first temperature-control box 41, maintaining the coolant temperature within a suitable range and ensuring effective cooling and high production efficiency. The first cooling trough 10 is provided with a plurality of first liquid return holes 11 along its length. The first pump body 43 connects the first liquid outlet 411 and the first liquid return holes 11. During cooling, the first pump body 43 transports the coolant within the first temperature-control box 41 to the first cooling trough 10, achieving coolant circulation. This circulating temperature control structure effectively controls the temperature of the first coolant within a suitable range, preventing the coolant from transferring heat to the environment and causing a drop in temperature. This ensures effective cooling, improves the water resistance of the cable, and ensures high product quality. Furthermore, the circulation of the first coolant, driven by the first pump body 43, also provides a driving force for the cable to move forward, thereby improving production efficiency.

[0034] The second temperature-control component includes a second temperature-control box 51, a second heater 52, and a second pump body 53. The second temperature-control box 51 is used to contain the coolant. On the one hand, the second temperature-control box 51 is connected to the second cooling tank 20, so that the second coolant in the second cooling tank 20 can flow into the second temperature-control box 51 and be heated, thereby maintaining the temperature of the second coolant within a suitable range and achieving further cooling of the cable. On the other hand, the second temperature-control box 51 is also connected to the third cooling tank 30, so that the cable can enter the third cooling tank 30 for final cooling.

[0035] The second temperature-controlled box 51 is provided with a second liquid outlet 511 to cooperate with the second pump body 53 to circulate the coolant. A second heater 52 is disposed within the second temperature-controlled box 51 and is used to heat the coolant within the second temperature-controlled box 51 to maintain the coolant temperature within a suitable range, ensuring good cooling effect and high production efficiency.

[0036] The second cooling trough 20 is provided with a plurality of second liquid return holes 21 in sequence along its length. The second pump body 53 is connected to the second liquid outlet hole 511 and the second liquid return hole 21 respectively. When cooling, the coolant in the second temperature control box 51 is transported to the second cooling trough 20 through the second pump body 53, thereby realizing the circulation of the coolant. By setting up this circulating temperature control structure, the temperature of the second coolant can be well controlled within an appropriate range, avoiding the problem of temperature drop caused by heat transfer to the environment, thereby ensuring a good cooling effect, so as to improve the water resistance of the cable and ensure high product quality. In addition, the second coolant is circulated under the drive of the second pump body 53, which can also provide a driving force for the cable to move forward to a certain extent, thereby improving production efficiency.

[0037] Preferably, the first temperature control element and the second temperature control element are provided at the same time to make the plasticization of the cable more complete.

[0038] Further, refer to Figure 1 and Figure 2As shown, in some embodiments of the cooling device described in the present invention, the discharge end of the first cooling trough 10 at least partially extends into the first temperature-controlled box 41, and the feed end of the second cooling trough 20 at least partially extends into the first temperature-controlled box 41; the discharge end of the second cooling trough 20 at least partially extends into the second temperature-controlled box 51, and the feed end of the third cooling trough 30 at least partially extends into the second temperature-controlled box 51. By setting up this structure, firstly, the space utilization rate of the device is effectively improved, the spatial layout is optimized, the volume of the device is reduced, and the overall structure is more compact for overall layout and operation. Secondly, the safety and reliability of the device are effectively improved. Under the premise of ensuring that the flow path of the trough is unobstructed, the possibility of direct contact between staff and high-temperature areas is reduced. Finally, this structure facilitates the introduction of the coolant in the corresponding cooling trough into the temperature-controlled box to achieve cyclic heating of the coolant, saving energy consumption required for temperature control, improving temperature control efficiency, and effectively ensuring good water resistance and quality of the cable.

[0039] Reference Figure 3 As shown, in some embodiments of the cooling device described in the present invention, the third cooling trough 30 is provided with a plurality of third liquid return holes 31 and a third liquid outlet hole 32 in sequence along its length. The cooling device also includes a third temperature control element 60, which is connected to the third liquid return hole 31 and the third liquid outlet hole 32, respectively. The third temperature control element 60 is used to cool a third coolant. Compared with the first coolant and the second coolant, the third coolant is used for the final cooling of the cable and has a lower temperature than the first and second coolants. During the cable cooling process, the third coolant is more susceptible to heat rise, resulting in failure to cool the cable. To this end, the third temperature control element 60 is provided to achieve circulating cooling of the coolant, thereby controlling the temperature of the third coolant within an appropriate range, thereby ensuring a good cooling effect, thereby improving the water resistance of the cable and ensuring high product quality. Those skilled in the art can configure the third temperature control element 60 according to actual needs; preferably, the third temperature control element 60 is configured as a circulating water chiller.

[0040] Reference Figure 2As shown, in some embodiments of the cooling device of the present invention, the length L1 of the first cooling trough 10 satisfies the relationship: 3.5m ≤ L1 ≤ 4.5m. The length L2 of the second cooling trough 20 satisfies the relationship: 7.5m ≤ L2 ≤ 8.5m. The length L3 of the third cooling trough 30 satisfies the relationship: 11.5m ≤ L3 ≤ 12.5m. When the lengths of the cooling troughs are too short, that is, the length L1 of the first cooling trough 10 is shorter than 3.5m, the length L2 of the second cooling trough 20 is shorter than 7.5m, and the length L3 of the third cooling trough 30 is shorter than 11.5m, the cooling length of the device is short, making it difficult to ensure adequate cooling of the cable. When the lengths of the cooling troughs are too long, that is, the length L1 of the first cooling trough 10 is longer than 4.5m, the length L2 of the second cooling trough 20 is longer than 8.5m, and the length L3 of the third cooling trough 30 is longer than 12.5m, the device becomes relatively bulky and space utilization is low. Furthermore, the device's temperature control energy consumption increases accordingly, resulting in high cooling costs. When the length L1 of the first cooling trough 10 is set to 3.5 to 4.5 m, the length L2 of the second cooling trough 20 is set to 7.5 to 8.5 m, and the length L3 of the third cooling trough 30 is set to 11.5 to 12.5 m, it is possible to effectively improve the space utilization of the device, reduce energy consumption and production costs, while ensuring the quality and production efficiency of the cable.

[0041] Those skilled in the art can set the actual length of each cooling trough according to actual needs. For example, the length L1 of the first cooling trough 10 is set to 3.5m, 3.6m, 3.7m, 3.8m, 3.9m, 4m, 4.1m, 4.2m, 4.3m, 4.4m, 4.5m, the length L2 of the second cooling trough 20 is set to 7.5m, 7.6m, 7.7m, 7.8m, 7.9m, 8m, 8.1m, 8.2m, 8.3m, 8.4m, 8.5m, and the length L3 of the third cooling trough 30 is set to 11.5m, 11.6m, 11.7m, 11.8m, 11.9m, 12m, 12.1m, 12.2m, 12.3m, 12.4m, 12.5m, etc.

[0042] In some embodiments of the cooling device described in the present invention, the temperature T1 of the first coolant satisfies the relationship, 75℃≤T1≤80℃; the temperature T2 of the second coolant satisfies the relationship, 70℃≤T2≤75℃; the temperature T3 of the third coolant satisfies the relationship, 20℃≤T3≤30℃, and T1≠T2. Setting the temperature T1 of the first coolant at 75 to 80℃ can not only form a difference with the temperature of the cable and achieve efficient cooling, but also the temperature difference between the temperature of the first coolant and the temperature of the cable will not be too large, which will not cause the insulation layer of the cable to shrink rapidly and cause gaps between the insulation layer and the internal conductor. Setting the temperature T2 of the second coolant at 70 to 75℃ can further achieve efficient cooling of the cable on the basis of the first coolant and ensure the high water resistance of the cable. After being cooled by the first and second coolants, the insulation layer of the cable has been cooled to a certain extent, and a certain degree of sealing has been achieved between it and the internal conductor. Therefore, by setting the temperature T3 of the third coolant at 20 to 30°C, a temperature difference can be formed with the temperature of the other coolants to achieve sufficient cooling of the insulation layer, so that the insulation layer and the internal conductor are tightly sealed, thereby improving the water resistance of the cable and ensuring high product quality.

[0043] Those skilled in the art can set the temperature of each cooling tank according to actual needs. For example, the temperature T1 of the first cooling tank 10 is set to 75°C, 76°C, 77°C, 78°C, 79°C, and 80°C, the temperature T2 of the second cooling tank 20 is set to 70°C, 71°C, 72°C, 73°C, 74°C, and 75°C, and the temperature T3 of the third cooling tank 30 is set to 20°C, 21°C, 22°C, 23°C, 24°C, 25°C, 26°C, 27°C, 28°C, 29°C, and 30°C, etc.

[0044] Reference Figure 2As shown, in some embodiments, the cooling device of the present invention further includes a first temperature sensor 12, a second temperature sensor 22, and a third temperature sensor 33. The first temperature sensor 12 is positioned in the middle region of the first cooling trough 10 along its length and is used to detect the temperature of the first temperature sensor 12. The second temperature sensor 22 is positioned in the middle region of the second cooling trough 20 along its length and is used to detect the temperature of the second temperature sensor 22. The third temperature sensor 33 is positioned in the middle region of the third cooling trough 30 along its length and is used to detect the temperature of the third temperature sensor 33. By positioning corresponding temperature sensors and restricting their positions, the temperature of the coolant in the corresponding cooling trough can be monitored in real time. When used in conjunction with components such as the first heater 42, the second heater 52, and the third temperature control element 60, more precise temperature control can be achieved, thereby improving cable quality and yield. Preferably, when a temperature sensor detects that the temperature is outside the target range, it issues an alarm signal to alert personnel for maintenance.

[0045] The present invention discloses a cable production device, comprising the cooling device described in any one of the above embodiments. Since the cable production device of the present invention includes the cooling device described in the above embodiments, the beneficial effects thereof are also possessed by the cable production device, which will not be described in detail.

[0046] Reference Figure 4As shown, the cable production equipment described in the present invention, in some embodiments, further includes an extrusion die 70. The extrusion die 70 is used to cooperate with an extrusion device, etc., to achieve extrusion production of cables. Specifically, the extrusion die 70 is hollow along the axial direction and forms an assembly area 71, an intersection area 72, and a sizing area 73 that are connected in sequence. Preferably, the assembly area 71, the intersection area 72, and the sizing area 73 are coaxially arranged. The inner wall surface of the assembly area 71 is inclined, and the diameter of the discharge end of the assembly area 71 is smaller than the diameter of the feed end of the assembly area 71 to facilitate assembly and connection with the corresponding device and guide the molten, irregularly shaped cable to form a cable with a uniform cross-sectional shape after passing through the intersection area 72 and the sizing area 73. The intersection area 72 includes a first intersection section 721 and a second intersection section 722. Preferably, the first intersection section 721 and the second intersection section 722 are coaxially arranged. The diameter of the first intersection section 721 is equal to the diameter of the discharge end of the assembly area 71, so as to guide the cable and enable the cable to smoothly enter the second intersection section 722. The inner wall surface of the second intersection section 722 is inclined, and the diameter of the discharge end of the second intersection section 722 is smaller than the diameter of the feed end of the second intersection section 722, so as to extrude the cable so that the radial size of the cable is close to that of the final product. The diameter of the sizing area 73 is equal to the diameter of the feed end of the second intersection section 722. After being shaped in the sizing area 73, the extrusion die 70 discharges the cable, and the shape of the discharged cable is close to that of the final product. By setting this structure, the extrusion preparation of the cable can be effectively achieved, and a cable with a uniform cross-sectional shape can be obtained, thereby laying a good foundation for subsequent cooling.

[0047] Further, refer to Figure 4 As shown, in the cable production equipment described in the present invention, in some embodiments, the length l1 of the sizing zone 73 satisfies the relationship: 1.5mm≤l1≤2.5mm. When the length l1 of the sizing zone 73 is less than 1.5mm, the entire sizing zone 73 is too short, the strength is low, and the mold is easily damaged, which reduces the service life of the mold. When the length l1 of the sizing zone 73 is greater than 2.5mm, the molten cable stays in the mold for a long time, which is prone to friction and temperature rise, causing the water-blocking glue of the cable to volatilize, affecting the material properties. Setting the length l1 of the sizing zone 73 to 1.5 to 2.5mm can well realize the transformation of the molten cable into a cable with a uniform cross-sectional shape. At the same time, it not only ensures the high strength of the extrusion die 70, but also reduces the time the molten cable stays in the mold, reduces the dimensional changes of the cable caused by flow, improves the dimensional consistency of the product, helps maintain the processing performance of the material, and lays the foundation for obtaining high-quality finished cables.

[0048] Reference Figure 3As shown, the cable production equipment of the present invention, in some embodiments, further includes a detector 80, which is disposed at the discharge end of the third cooling trough 30. The detector 80 is used to detect data information of the cable discharged from the discharge end of the third cooling trough 30. Preferably, the detector 80 is configured as an infrared deflectometer to detect the outer diameter, eccentricity, insulation thickness, etc. of the cable through the infrared deflectometer, thereby controlling the quality of the cable.

[0049] Working principle:

[0050] The cable is extruded by an extruder in conjunction with an extrusion die 70. The molten, irregularly shaped cable passes through the various zones of the extrusion die 70 and is extruded from the sizing zone 73, transforming into a cable with a uniform cross-sectional shape. The extruded cable is then pulled into the first cooling trough 10 by a device such as a robotic arm. The cable is continuously pulled through the 4m-long first cooling trough 10, the 8m-long second cooling trough 20, and the 12m-long third cooling trough 30.

[0051] In the first cooling tank 10, the cable is cooled by a first coolant at a temperature of 78°C. In the second cooling tank 20, the cable is cooled by a second coolant at a temperature of 73°C. In the third cooling tank 30, the cable is cooled by a third coolant at a temperature of 25°C. During the cooling process, the first, second, and third temperature control elements 60 continuously operate to control the temperatures of the corresponding coolants.

[0052] After cooling is completed, the data information of the cable is detected by the detector 80 so as to proceed with subsequent processes.

[0053] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A cooling device, characterized in that: include: a first cooling tank, the first cooling tank being used to contain a first coolant; a second cooling groove, the second cooling groove being connected to the first cooling groove and being used to contain a second coolant; as well as a third cooling groove, the third cooling groove being connected to the second cooling groove and being used to contain a third coolant; Among them, the length L1 of the first cooling groove, the length L2 of the second cooling groove and the length L3 of the third cooling groove satisfy the relationship: L1<L2<L3; the temperature T1 of the first coolant, the temperature T2 of the second coolant and the temperature T3 of the third coolant satisfy the relationship: T3<T2<T1.

2. The cooling device according to claim 1, characterized in that Also includes: a first temperature control component, the first temperature control component comprising a first temperature control box, a first heater and a first pump body, the first temperature control box being connected to the first cooling tank and the second cooling tank respectively, the first temperature control box being provided with a first liquid outlet, the first heater being provided in the first temperature control box, the first heater being used to heat the coolant in the first temperature control box, the first cooling tank being provided with a plurality of first liquid return holes in sequence along its length direction, the first pump body being connected to the first liquid outlet hole and the first liquid return hole respectively, for transporting the coolant in the first temperature control box to the first cooling tank through the first pump body; or / and The second temperature control component includes a second temperature control box, a second heater and a second pump body, the second temperature control box is respectively connected to the second cooling tank and the third cooling tank, the second temperature control box is provided with a second liquid outlet, the second heater is arranged in the second temperature control box, the second heater is used to heat the coolant in the second temperature control box, the second cooling tank is sequentially provided with a plurality of second return liquid holes along its own length direction, the second pump body is respectively connected to the second liquid outlet and the second return liquid hole, so as to transport the coolant in the second temperature control box to the second cooling tank through the second pump body.

3. The cooling device according to claim 2, characterized in that: The discharge end of the first cooling trough at least partially extends into the first temperature-controlled box, and the feed end of the second cooling trough at least partially extends into the first temperature-controlled box; The discharge end of the second cooling trough at least partially extends into the second temperature-controlled box, and the feed end of the third cooling trough at least partially extends into the second temperature-controlled box.

4. The cooling device according to claim 1, wherein: The third cooling trough is provided with a plurality of third liquid return holes and a third liquid outlet hole in sequence along its length direction; The cooling device further includes a third temperature control component, which is connected to the third liquid return hole and the third liquid outlet hole respectively, and is used to cool the third coolant.

5. The cooling device according to any one of claims 1 to 4, characterized in that: The length L1 of the first cooling trough satisfies the relationship: 3.5m≤L1≤4.5m, The length L2 of the second cooling trough satisfies the relationship: 7.5m≤L2≤8.5m, The length L3 of the third cooling groove satisfies the relationship: 11.5m≤L3≤12.5m.

6. The cooling device according to any one of claims 1 to 4, characterized in that: The temperature T1 of the first coolant satisfies the relationship: 75°C≤T1≤80°C. The temperature T2 of the second coolant satisfies the relationship: 70°C≤T2≤75°C, The temperature T3 of the third coolant satisfies the relationship: 20° C. ≤ T3 ≤ 30° C., and T1 ≠ T2.

7. The cooling device according to any one of claims 1 to 4, characterized in that: Also includes: a first temperature sensor, disposed in a middle region of the first cooling slot along a length direction of the first cooling slot, and configured to detect a temperature of the first temperature sensor; a second temperature sensor, disposed in a middle region of the second cooling trough along a length direction of the second cooling trough, the second temperature sensor being configured to detect a temperature of the second temperature sensor; as well as A third temperature sensor is provided in a middle area of the third cooling groove along the length direction of the third cooling groove, and is used to detect the temperature of the third temperature sensor.

8. A cable production device, characterized in that: include: An extrusion die, wherein the extrusion die is hollow in the axial direction and forms an assembly area, an intersection area, and a sizing area that are sequentially connected; the inner wall surface of the assembly area is inclined, and the diameter of the discharge end of the assembly area is smaller than the diameter of the feed end of the assembly area; the intersection area includes a first intersection section and a second intersection section, the diameter of the first intersection section is equal to the diameter of the discharge end of the assembly area, the inner wall surface of the second intersection section is inclined, and the diameter of the discharge end of the second intersection section is smaller than the diameter of the feed end of the second intersection section; the diameter of the sizing zone is equal to the diameter of the feed end of the second intersection section; and A cooling device as claimed in any one of claims 1 to 7.

9. The cable production equipment according to claim 8, characterized in that: The length l1 of the sizing zone satisfies the relationship: 1.5 mm ≤ l1 ≤ 2.5 mm.

10. The cable production equipment according to claim 8, characterized in that: The device further comprises a detector, which is arranged at the discharge end of the third cooling trough and is used to detect data information of the cable discharged from the discharge end of the third cooling trough.

Images