Cooling device and cable production equipment

Abstract

The invention relates to the technical field of cables, in particular to a cooling device and cable production equipment.The cooling device comprises a first cooling tank, a second cooling tank and a third cooling tank, the first cooling tank is used for containing first cooling liquid, the second cooling tank is communicated with the first cooling tank, the second cooling tank is used for containing 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 high product quality is ensured.

Description

Technical Field

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

[0002] Umbilical cable is a product used in deepwater oil and gas exploration and development. It connects offshore platforms and equipment such as oil and gas wells on the seabed to achieve tasks such as power transmission. Due to the high sea pressure in deepwater, in order to ensure that the umbilical cable can work normally in a high-pressure environment and prevent water penetration, the umbilical cable has high requirements for water resistance.

[0003] Generally speaking, an umbilical cable includes an insulation layer and a conductor inside the insulation layer. Research by staff has shown that the insulation layer is related to the overall water resistance of the cable. During the production of the umbilical cable, after the insulation layer is covered on the outside of the conductor, the cable needs to be cooled by a cooling device.

[0004] However, when the existing cooling device cools the extruded cable, the insulating layer located on the outside along the radial direction of the cable is quickly cooled due to contact with the coolant, while the insulating layer located on the inside is not fully cooled because it is relatively far away from the coolant. This leads to a loose seal between the insulating layer and the internal conductor, and tiny cracks or holes on the insulating layer, resulting in poor water resistance of the cable and the product quality cannot 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 the 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 present invention provides a cooling device, comprising a first cooling groove, the first cooling groove is used to accommodate a first coolant; a second cooling groove, the second cooling groove is connected to the first cooling groove, the second cooling groove is used to accommodate a second coolant; and a third cooling groove, the third cooling groove is connected to the second cooling groove, the third cooling groove is used to accommodate a third coolant; wherein 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.

[0007] In one embodiment of the present invention, it also includes a first temperature control component, which includes a first temperature control box, a first heater and a first pump body, the first temperature control box is connected to the first cooling tank and the second cooling tank respectively, 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 provided with a plurality of first liquid return holes in sequence along its length direction, the first pump body is connected to the first liquid outlet and the first liquid return hole respectively, so as to transport the coolant in the first temperature control box to the first cooling tank through the first pump body; or / and a 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 connected to the second cooling tank and the third cooling tank respectively, 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 provided with a plurality of second liquid return holes in sequence along its length direction, the second pump body is connected to the second liquid outlet and the second liquid return hole respectively, 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 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 groove satisfies the relationship: 3.5m≤L1≤4.5m, the length L2 of the second cooling groove satisfies the relationship: 7.5m≤L2≤8.5m, and the length L3 of the third cooling groove 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 a 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 a 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 a 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 present invention also provides a cable production equipment, comprising an extrusion die and a cooling device as described in any one of the above; 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 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.

[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 present invention has the following beneficial effects compared with the prior art: The cooling device of 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 a suitable 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

[0017] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below according to specific embodiments of the present invention in conjunction with the accompanying drawings, wherein: Figure 1 It is a schematic diagram of a local structure of a cooling device from a first viewing angle in a preferred embodiment of the present invention; Figure 2 A schematic diagram of a local structure of a cooling device from a second viewing angle in a preferred embodiment of the present invention; Figure 3 It is a schematic diagram of the partial structure of the cable production equipment in the preferred embodiment of the present invention; Figure 4 It is a cross-sectional view of an extrusion die in a preferred embodiment of the present invention.

[0018] 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

[0019] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0020] Reference Figure 1 As shown, the present invention discloses a cooling device, comprising a first cooling slot 10 , a second cooling slot 20 and a third cooling slot 30 .

[0021] The first cooling tank 10 is used to contain a 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 a 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 a third coolant. Those skilled in the art can set the corresponding coolant according to actual needs; preferably, each coolant is set to water.

[0022] 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 relational expression: 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 relational expression: 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.

[0023] On the premise of meeting the length requirements, those skilled in the art can set the shapes of the respective cooling tanks according to actual needs. Preferably, a plane is taken, which is perpendicular to the length direction of the corresponding cooling tank, and the cross-sectional shape of the cooling tank is set as a "U"-shaped structure to accommodate the coolant. Preferably, components such as rollers can be arranged in the cooling tank to facilitate the passing of the cable.

[0024] 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 successively 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 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 gradually decreases, the temperature change during the cooling process is more gentle, avoiding excessive temperature differences 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, the cable can be more fully cooled on the premise of appropriate cooling temperature, effectively avoiding the phenomenon 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.

[0025] The cooling device described in the present invention realizes the cooling of the cable by setting the first cooling tank 10, the second cooling tank 20, and the third cooling tank 30 with different lengths and setting coolants with different temperatures therein. 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 gradually decreases, the temperature change during the cooling process is more gentle, avoiding excessive temperature differences 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, the cable can be more fully cooled on the premise of appropriate cooling temperature, effectively avoiding the phenomenon 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.

[0026] Refer to 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.

[0027] 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 the 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, so that the temperature of the first coolant can be maintained in a suitable range and the initial cooling of the cable can be achieved; 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.

[0028] The first temperature control box 41 is provided with a first liquid outlet 411 to cooperate with the first pump body 43 to realize the circulation of the cooling liquid. The first heater 42 is arranged in the first temperature control box 41, and the first heater 42 is used to heat the cooling liquid in the first temperature control box 41, so that the temperature of the cooling liquid can be maintained in a suitable range, ensuring a good cooling effect and high production efficiency. The first cooling tank 10 is sequentially provided with a plurality of first liquid return holes 11 along its length direction, and the first pump body 43 is connected to the first liquid outlet 411 and the first liquid return hole 11 respectively. When cooling, the cooling liquid in the first temperature control box 41 is transported to the first cooling tank 10 through the first pump body 43 to realize the circulation of the cooling liquid. By setting up this circulating temperature control structure, the temperature of the first cooling liquid can be well controlled within a suitable range, avoiding the problem of temperature reduction 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 the high quality of the product. In addition, the first cooling liquid is circulated under the drive of the first pump body 43, which can also provide a driving force for the cable to move forward to a certain extent, thereby improving the production efficiency.

[0029] 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, so that the temperature of the second coolant can be maintained in a suitable range and further cooling of the cable can be achieved; 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 to achieve final cooling.

[0030] The second temperature control box 51 is provided with a second liquid outlet 511 to cooperate with the second pump body 53 to realize the circulation of the coolant. The second heater 52 is arranged in the second temperature control box 51, and the second heater 52 is used to heat the coolant in the second temperature control box 51, so that the temperature of the coolant can be maintained in a suitable range, ensuring a good cooling effect and high production efficiency.

[0031] The second cooling trough 20 is provided with a plurality of second liquid return holes 21 in sequence along its length direction, and 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 to realize the circulation of the coolant. By setting up this circulating temperature control structure, the temperature of the second coolant can be well controlled within a suitable range to avoid the problem of temperature reduction due to heat transfer to the environment, thereby ensuring a good cooling effect, so as to improve the water resistance of the cable and ensure the high quality of the product. 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.

[0032] 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.

[0033] Further, see Figure 1 and Figure 2 As shown, in some embodiments of the cooling device of the present invention, the discharge end of the first cooling trough 10 at least partially extends into the first temperature control box 41, and the feed end of the second cooling trough 20 at least partially extends into the first temperature control box 41; the discharge end of the second cooling trough 20 at least partially extends into the second temperature control box 51, and the feed end of the third cooling trough 30 at least partially extends into the second temperature control box 51. By setting this structure, firstly, the space utilization rate of the device is effectively improved, the space layout is optimized, the volume of the device is reduced, and the overall structure is more compact, which is convenient for overall layout and operation. Secondly, the safety and reliability of the device are effectively improved, and the possibility of direct contact between the staff and the high-temperature area is reduced under the premise of ensuring that the flow path of the trough is unobstructed. Finally, the structure facilitates the introduction of the coolant in the corresponding cooling trough into the temperature control box to realize the cyclic heating of the coolant, save the energy consumption required for temperature control, improve the temperature control efficiency, and effectively ensure the good water resistance and quality of the cable.

[0034] Reference Figure 3As shown, in some embodiments of the cooling device of the present invention, the third cooling trough 30 is sequentially provided with a plurality of third liquid return holes 31 and a third liquid outlet hole 32 along its length direction. The cooling device also includes a third temperature control component 60, which is connected to the third liquid return hole 31 and the third liquid outlet hole 32 respectively, and the third temperature control component 60 is used to cool the third coolant. Compared with the first coolant and the second coolant, the third coolant is used for the final cooling of the cable, and its temperature is lower than the first two. In the process of cooling the cable, the third coolant is more susceptible to heat rise, resulting in the inability to cool the cable. To this end, by setting the third temperature control component 60, the circulating cooling of the coolant is realized, so that the temperature of the third coolant is controlled within a suitable range, thereby ensuring a good cooling effect, so as to improve the water resistance of the cable and ensure the high quality of the product. Those skilled in the art can set the third temperature control component 60 according to actual needs; preferably, the third temperature control component 60 is set as a circulating chiller.

[0035] Reference Figure 2 As 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 length of each cooling trough is 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, and it is difficult to ensure that the cable is fully cooled. When the length of each cooling trough is 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, on the one hand, the volume of the device is relatively large and the space utilization rate is low; on the other hand, the energy consumption of the temperature control of the device is also increased accordingly, and the cooling cost is high. 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 and reduce energy consumption and production costs while ensuring the quality and production efficiency of the cable.

[0036] 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.

[0037] 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, and will not cause the insulation layer of the cable to shrink rapidly and cause a gap 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.

[0038] 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.

[0039] Reference Figure 2As shown, the cooling device of the present invention, in some embodiments, further includes a first temperature sensor 12, a second temperature sensor 22 and a third temperature sensor 33. Among them, along the length direction of the first cooling trough 10, the first temperature sensor 12 is arranged in the middle area of ​​the first cooling trough 10, and the first temperature sensor 12 is used to detect the temperature of the first temperature sensor 12. Along the length direction of the second cooling trough 20, the second temperature sensor 22 is arranged in the middle area of ​​the second cooling trough 20, and the second temperature sensor 22 is used to detect the temperature of the second temperature sensor 22. Along the length direction of the third cooling trough 30, the third temperature sensor 33 is arranged in the middle area of ​​the third cooling trough 30, and the third temperature sensor 33 is used to detect the temperature of the third temperature sensor 33. By setting the corresponding temperature sensor and limiting its position, the temperature of the coolant in the corresponding cooling trough can be monitored in real time. When cooperating with components such as the first heater 42, the second heater 52, the third temperature control member 60, etc., the temperature can be controlled more accurately to improve the quality and qualified rate of the cable. Preferably, when the temperature sensor detects that the temperature is not within the target range, it sends an alarm signal to remind the staff to repair.

[0040] 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 comprises the cooling device described in the above embodiments, the cable production device also has all the beneficial effects, which will not be described in detail.

[0041] Reference Figure 4As shown, the cable production equipment described in the present invention, in some embodiments, further includes an extrusion die 70, and the extrusion die 70 is used to cooperate with an extrusion device, etc. to realize extrusion preparation 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, so as to be assembled and connected with the corresponding device, and to guide the molten, irregularly shaped cable, so that it forms 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 the final product. The diameter of the sizing zone 73 is equal to the diameter of the feed end of the second intersection section 722. After being shaped in the sizing zone 73, the extrusion die 70 discharges the cable, and the shape of the discharged cable is close to the shape of the final product. By setting this structure, the extrusion preparation of the cable can be effectively realized, and a cable with a uniform cross-sectional shape can be obtained, so as to lay a good foundation for subsequent cooling.

[0042] Further, see Figure 4 As shown, in some embodiments of the cable production equipment described in the present invention, 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 length of 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, and friction is prone to cause temperature rise, causing the water-blocking glue of the cable to volatilize, affecting the material properties. When the length l1 of the sizing zone 73 is set to 1.5 to 2.5mm, it is possible to 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, and helps to maintain the processing performance of the material, so as to lay the foundation for obtaining high-quality finished cables.

[0043] Reference Figure 3As shown, the cable production equipment of the present invention, in some embodiments, further includes a detector 80, which is arranged at the discharge end of the third cooling trough 30, and 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 set as an infrared deflectometer, so as to detect the outer diameter, eccentricity, insulation layer thickness, etc. of the cable through the infrared deflectometer, so as to control the quality of the cable.

[0044] Working principle: The cable is extruded by an extruder in cooperation with an extrusion die 70. The molten, irregularly shaped cable is transformed into a cable with a uniform cross-sectional shape after passing through each zone of the extrusion die 70 and being extruded from the sizing zone 73. Under the traction of a device such as a robot arm, the extruded cable is pulled into the first cooling trough 10. The cable is pulled so that it flows through the first cooling trough 10 with a length of 4 m, the second cooling trough 20 with a length of 8 m, and the third cooling trough 30 with a length of 12 m in sequence.

[0045] In the first cooling tank 10, the cable is cooled by the first coolant at a temperature of 78° C. In the second cooling tank 20, the cable is cooled by the second coolant at a temperature of 73° C. In the third cooling tank 30, the cable is cooled by the third coolant at a temperature of 25° C. During the cooling process, the first temperature control element, the second temperature control element and the third temperature control element 60 continue to work to control the temperature of the corresponding coolant.

[0046] After cooling is completed, the data information of the cable is detected by the detector 80 so as to carry out the subsequent process.

[0047] Obviously, the above embodiments are merely examples for clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the protection scope of the invention.

Claims

1. A cooling device, characterized in that: include: a first cooling tank, the first cooling tank being used to contain a first cooling liquid; a second cooling groove, the second cooling groove being connected to the first cooling groove, and the second cooling groove being used for containing a second coolant; as well as a third cooling groove, the third cooling groove being connected to the second cooling groove, and the third cooling groove 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 comprises 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 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; 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 liquid return holes along its length direction, the second pump body is respectively connected to the second liquid outlet and the second liquid return 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, characterized in that: The third cooling groove 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 also 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 groove satisfies the relationship: 3.5m≤L1≤4.5m, The length L2 of the second cooling groove 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 is disposed in a middle area of ​​the first cooling groove along a length direction of the first cooling groove, and the first temperature sensor is used to detect a temperature of the first temperature sensor; A second temperature sensor is disposed in a middle region of the second cooling groove along a length direction of the second cooling groove, and the second temperature sensor is used to detect a temperature of the second temperature sensor; as well as A third temperature sensor is arranged in a 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.

8. A cable production device, characterized in that: include: An extrusion die, wherein the extrusion die is hollow along the axial direction and forms an assembly area, an intersection area and a sizing area which are connected in sequence; 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: It also includes 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.

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