Quenching system for power cable

Abstract

The invention relates to a chilling system for a power cable. The chilling system for the power cable comprises a chilling pipeline main body and a cooling gas circulation mechanism, a pipeline cavity is formed in the chilling pipeline main body, and a wire core passes through the pipeline cavity; the cooling gas circulating mechanism comprises a gas inlet unit and a gas outlet unit which are arranged on the chilling pipeline main body, and the gas inlet unit and the gas outlet unit are respectively communicated with the pipeline cavity and are used for injecting cooling gas into the pipeline cavity and discharging the cooling gas from the pipeline cavity; the gas inlet unit comprises a pressure reduction channel arranged on the chilling pipeline main body, the pressure reduction channel is provided with a pressure reduction inlet and a pressure reduction outlet, the pressure reduction inlet is connected with a gas source, the pressure reduction outlet is communicated with the pipeline cavity, and after cooling gas passes through the pressure reduction channel, the gas pressure at the pressure reduction outlet is smaller than that at the pressure reduction inlet. The pressure reduction channel enables the pressure of the cooling gas to be reduced when the cooling gas enters the pipeline cavity, thereby avoiding the impact on the wire core caused by the overhigh pressure, effectively reducing the non-uniform extrusion on the wire core caused by the non-uniform pressure in the pipeline, and improving the roundness of the cable.

Description

Technical Field

[0001] This application relates to the technical field of cable production equipment, particularly to a quenching system for power cables. Background Art

[0002] With the continuous growth of social demand for electricity, power cables, as the main power transmission equipment, are of crucial performance and reliability. PP cables, namely polypropylene cables, are a type of cable widely used in the field of power transmission. They have polypropylene material as a key component. During the production process of PP power cables, the three-layer co-extrusion technology is widely applied. This technology simultaneously extrudes the inner and outer semiconductive layers and the insulating layer to form a tightly combined cable structure, effectively improving the initial partial discharge voltage and overall performance of the cable.

[0003] However, during the cooling process of the existing quenching system, it is difficult to accurately control the flow rate and flow volume of nitrogen, resulting in uneven pressure distribution inside the quencher and significant pressure differences around the cable core. Such pressure differences will cause the core to be unevenly squeezed, leading to insufficient roundness of the cable, forming defective products, and increasing material waste and cost losses during the production process. Summary of the Invention

[0004] Based on this, a quenching system for power cables is provided to solve the problem of insufficient cable roundness caused by uneven pressure.

[0005] An embodiment of this application proposes a quenching system for power cables, including:

[0006] A main quenching pipeline, in which a pipeline cavity is provided, and the pipeline cavity allows the core to pass through;

[0007] A cooling gas circulation mechanism, which includes an intake unit and an outlet unit arranged on the main quenching pipeline. The intake unit and the outlet unit are respectively communicated with the pipeline cavity for injecting and discharging cooling gas into the pipeline cavity. The intake unit includes a pressure reduction channel arranged on the main quenching pipeline. The pressure reduction channel is provided with a pressure reduction inlet and a pressure reduction outlet. The pressure reduction inlet is connected to a gas source, and the pressure reduction outlet is communicated with the pipeline cavity. After the cooling gas passes through the pressure reduction channel, the gas pressure at the pressure reduction outlet is less than the gas pressure at the pressure reduction inlet.

[0008] In one embodiment, the pressure reduction channel includes a first channel and a second channel. The first channel and the second channel are communicated, and a corner structure is arranged at the communication part.

[0009] In one embodiment, the intake unit further includes a pressure sensor disposed at the pressure reduction outlet, and the pressure sensor is configured to monitor in real time the gas pressure signal at the pressure reduction outlet;

[0010] The pressure sensor is communicatively connected to the gas source, and the gas source adjusts the gas flow rate according to the gas pressure signal of the pressure sensor.

[0011] In one embodiment, the outlet unit includes an exhaust passage disposed on the main body of the quench pipe. The exhaust passage is provided with an exhaust inlet and an exhaust outlet. The exhaust inlet is in communication with the pipe cavity, and the exhaust outlet is in communication with the outside of the main body of the quench pipe. The cooling gas is discharged sequentially through the exhaust inlet and the exhaust outlet.

[0012] In one embodiment, the outlet unit includes a flow stabilizing plate disposed at the exhaust inlet, and the flow stabilizing plate is provided with a flow stabilizing through-hole for the cooling gas to pass through.

[0013] In one embodiment, the flow stabilizing plate includes a flow stabilizing body and a rotating shaft. The flow stabilizing through-hole is disposed on the flow stabilizing body. The flow stabilizing body is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the main body of the quench pipe.

[0014] In one embodiment, the rotating shaft is connected to a driving motor, and the driving motor drives the rotating shaft to rotate;

[0015] The driving motor is communicatively connected to the pressure sensor, and the driving motor adjusts the rotation of the flow stabilizing body according to the gas pressure signal of the pressure sensor.

[0016] In one embodiment, the pressure reduction outlet and the exhaust inlet are disposed on the same side of the axial direction of the core.

[0017] In one embodiment, the quench system for power cables further includes a temperature sensor disposed in the pipe cavity, and the temperature sensor is configured to monitor in real time the temperature signal in the pipe cavity;

[0018] The temperature sensor is communicatively connected to the gas source, and the gas source adjusts the gas flow rate according to the temperature signal of the temperature sensor.

[0019] In one embodiment, the quench system for power cables further includes an exhaust gas collection mechanism, and the exhaust gas collection mechanism is connected to the outlet unit for collecting the discharged cooling gas.

[0020] According to the quenching system for power cables in the embodiments of the present application, after the cooling gas passes through the pressure reduction channel, the pressure at the pressure reduction outlet is less than that at the pressure reduction inlet, so that the pressure of the gas entering the pipe cavity is stabilized within a suitable range. On the basis of meeting the cable cooling requirements, it can effectively reduce the problem of cable non-roundness caused by uneven internal pipe pressure, which is beneficial to improving the qualification rate of PP cable production. Brief Description of the Drawings

[0021] Figure 1 It is a schematic structural diagram of the quenching system for power cables in an embodiment of the present application.

[0022] Figure 2 It is a schematic partial structural diagram of the quenching system for power cables in an embodiment of the present application.

[0023] Figure 3 It is a schematic structural diagram of the flow stabilizer plate in the quenching system for power cables in an embodiment of the present application.

[0024] Figure 4 It is a cross-sectional view showing the flow stabilizer plate in the quenching system for power cables in an embodiment of the present application.

[0025] Reference Signs:

[0026] 100, main body of the quenching pipe; 110, pipe cavity; 120, core.

[0027] 200, cooling gas circulation mechanism; 210, intake unit; 211, pressure reduction channel; 2111, first channel; 2111a, pressure reduction inlet; 2112, second channel; 2112a, pressure reduction outlet; 212, pressure sensor; 220, outlet unit; 221, exhaust channel; 2211, exhaust inlet; 2212, exhaust outlet; 2213, flange structure; 222, flow stabilizer plate; 2221, flow stabilizer body; 2221a, flow stabilizing through hole; 2222, rotating shaft; 2222a, driving motor.

[0028] 300, waste gas collection mechanism; 310, collection pipe; 320, collector.

[0029] 400, temperature sensor;

[0030] 500, head;

[0031] 600, side deviation meter;

[0032] 700, vulcanizing pipe; 710, gas inlet. Detailed Embodiments

[0033] To make the above objects, features, and advantages of the present application more apparent and understandable, the following provides a detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

[0034] In the description of the present application, it should be understood that if terms such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or positional relationship indicated by these terms is based on the orientation or positional relationship shown in the accompanying drawings. These are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present application.

[0035] In addition, if terms such as "first" and "second" appear, these terms are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present application, if the term "plural" appears, the meaning of "plural" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0036] In the present application, unless otherwise clearly specified and limited, if terms such as "install", "connect", "join", "fix", etc. appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0037] In this application, unless otherwise clearly specified and defined, if there is a description such as a first feature being "on" or "under" a second feature, etc., its meaning can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or simply means that the horizontal height of the first feature is less than that of the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. If an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intermediate element at the same time. If so, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in this application are only for the purpose of illustration and do not represent the only implementation.

[0039] Referring to Figure 1 and Figure 2 , at least one embodiment of this application provides a quenching system for a power cable. The quenching system for a power cable includes a quenching pipe main body 100 and a cooling gas circulation mechanism 200. A pipe cavity 110 is provided in the quenching pipe main body 100, and the pipe cavity 110 is for the wire core 120 to pass through. The cooling gas circulation mechanism 200 includes an air inlet unit 210 and an air outlet unit 220 provided on the quenching pipe main body 100. The air inlet unit 210 and the air outlet unit 220 are respectively communicated with the pipe cavity 110 for injecting and discharging cooling gas into the pipe cavity 110. The air inlet unit 210 includes a pressure reducing channel 211 provided on the quenching pipe main body 100. The pressure reducing channel 211 is provided with a pressure reducing inlet 2111a and a pressure reducing outlet 2112a. The pressure reducing inlet 2111a is connected to a gas source, and the pressure reducing outlet 2112a is communicated with the pipe cavity 110. After the cooling gas passes through the pressure reducing channel 211, the gas pressure at the pressure reducing outlet 2112a is less than the gas pressure at the pressure reducing inlet 2111a.

[0040] Among them, the pipe cavity 110 provides a space for the core 120 to pass through. During the cable production process, the core 120 completes cooling and other processing steps therein. The intake unit 210 is responsible for injecting cooling gas into the pipe cavity 110, while the exhaust unit 220 discharges the used cooling gas. The two work together to ensure the circulating flow of the cooling gas within the system. The pressure reduction channel 211 in the intake unit 210 is provided with a pressure reduction inlet 2111a and a pressure reduction outlet 2112a, which are respectively connected to the gas source and the pipe cavity 110, and adjust the pressure of the gas before it enters the pipe cavity 110. The cooling gas circulation mechanism 200 injects cooling gas into the pipe cavity 110 through the intake unit 210, takes away the heat of the core 120, achieves the cooling effect, ensures that the cable will not soften, deform, etc. due to high temperature during the production process, and guarantees the structural stability of the cable. The pressure reduction channel 211 reduces the pressure of the cooling gas when it enters the pipe cavity 110, avoiding the impact of too high pressure on the core 120. By reducing the gas pressure at the pressure reduction outlet 2112a, the gas pressure entering the pipe cavity 110 is stabilized within a suitable range, effectively reducing the uneven extrusion of the core 120 caused by uneven internal pipe pressure, improving the roundness of the cable, and further enhancing the qualified rate of PP cable production.

[0041] For the rapid cooling system for power cables according to the embodiment of the present application, after the cooling gas passes through the pressure reduction channel 211, the pressure at the pressure reduction outlet 2112a is less than that at the pressure reduction inlet 2111a, so that the gas pressure entering the pipe cavity 110 is stabilized within a suitable range. On the basis of meeting the cable cooling requirements, it can effectively reduce the problem of cable non-roundness caused by uneven internal pipe pressure, which is beneficial to improving the qualified rate of PP cable production.

[0042] In some embodiments, the cooling gas can be selected as nitrogen or the like. Specifically, nitrogen has stable chemical properties, relatively low cost, is easily obtainable, and can meet the cable cooling requirements. It is an ideal choice for cooling gas. During the cable cooling process, it is not likely to chemically react with the cable material and will not have an adverse impact on the structure and performance of the cable. This characteristic can ensure the quality stability of the cable during the cooling process and avoid problems such as corrosion and aging of the cable caused by the reaction between the gas and the cable material, thereby extending the service life of the cable. In a high-temperature environment, some other gases may react with the insulation layer or conductor of the cable, affecting the insulation performance and conductivity of the cable, while nitrogen can effectively avoid this situation. Nitrogen is abundant in the air, relatively easy to obtain, and has a low cost. In the large-scale cable production process, using nitrogen as the cooling gas can reduce production costs. Compared with some rare gases or special gases, nitrogen has an obvious price advantage, which makes it cost-effective to use nitrogen as the cooling gas in industrial production. Nitrogen has good cooling performance and can effectively absorb the heat generated by the cable to achieve a rapid cooling effect. Its specific heat capacity is moderate, and it can quickly take away the heat of the cable when absorbing heat, rapidly reducing the temperature of the cable to meet the requirements of the quenching system for the cable cooling efficiency. At the same time, nitrogen also has good heat conduction performance, which can ensure that the heat is evenly transferred from the cable to the nitrogen, avoiding local overheating of the cable and ensuring the uniformity of cable cooling.

[0043] It can be understood that in some embodiments, in addition to nitrogen, the cooling gas can also be selected as dry air, carbon dioxide, argon, etc.

[0044] In some embodiments, the pressure reduction channel 211 includes a first channel 2111 and a second channel 2112. The first channel 2111 and the second channel 2112 are connected, and a corner structure is provided at the connection. The axes of the first channel 2111 and the second channel 2112 intersect.

[0045] Through the above settings, when the gas flows through the pressure reduction channel 211, the flow path changes. The corner structure increases the resistance of the gas flow, helps to reduce the gas flow rate, gradually reduces the gas pressure during the flow process, and avoids high-pressure gas directly impacting the wire core 120 in the pipe cavity 110.

[0046] In some embodiments, the pressure reduction inlet 2111a is provided on the first channel 2111, and the pressure reduction outlet 2112a is provided on the second channel 2112. And the radial dimension of the first channel 2111 is smaller than the radial dimension of the second channel 2112.

[0047] Specifically, the pressure reduction inlet 2111a is in the first channel 2111, from where the gas enters the pressure reduction channel 211. The diameter of the first channel 2111 is smaller than that of the second channel 2112. According to the principle of fluid mechanics, when the gas flows from the first channel 2111 with a smaller radial dimension into the second channel 2112 with a larger radial dimension, the flow rate of the gas will decrease, and the pressure will also decrease accordingly. Through this change in pipe diameter, the pressure reduction effect of the pressure reduction channel 211 is further enhanced, so that when the cooling gas reaches the pressure reduction outlet 2112a, the pressure energy can be stabilized within a lower and appropriate range, avoiding excessive pressure impact on the core 120, effectively reducing the cable roundness problem caused by uneven pressure, and improving the production qualification rate of the PP cable.

[0048] The first channel 2111 with a smaller pipe diameter has a certain restrictive effect on the gas flow rate, and the gas flows relatively fast therein. When the gas enters the second channel 2112 with a larger pipe diameter, the flow rate slows down and the flow becomes more stable. A stable gas flow rate is crucial for maintaining the pressure stability in the pipe cavity 110. If the gas flow rate is unstable, it will cause pressure fluctuations, affecting the cable cooling effect and roundness. This pipe diameter design helps to ensure that the cooling gas enters the pipe cavity 110 at a stable speed, providing a uniform cooling environment for the cable and ensuring the stability and quality during the cable production process.

[0049] It can be understood that the pressure reduction channel 211 is not limited to the above-mentioned embodiment form. In some embodiments, the pressure reduction channel 211 can be configured as a multi-stage series pressure reduction channel 211, and multiple pressure reduction channels 211 are arranged in series. Each pressure reduction channel 211 can be a simple straight pipe section, and the channels are connected by a reduced diameter structure or a throttling device. For example, the gas first enters a first-stage pressure reduction channel 211 with a larger pipe diameter, and then enters a second-stage pressure reduction channel 211 with a smaller pipe diameter through a constriction, and so on, forming multi-stage pressure reduction. When the gas flows in channels with different pipe diameters, according to the principle of fluid mechanics, the change in pipe diameter will cause changes in the gas flow rate and pressure. Multi-stage series can achieve multiple pressure reductions, making the pressure change more stable and avoiding pressure surges impacting the system. At the same time, this structure can adjust the number of stages and the pipe diameter size according to actual needs to meet different pressure reduction requirements.

[0050] In some embodiments, the pressure reduction channel 211 can also be configured as a labyrinth pressure reduction channel 211, which is designed in a labyrinth shape. A plurality of baffles or partitions are arranged in the pressure reduction channel 211, so that the gas continuously changes its flow direction in the pressure reduction channel 211, forming a tortuous flow path. These baffles can be arranged perpendicular to the axial direction of the channel or at a certain angle. When the gas flows in the labyrinth channel, due to the continuous change of direction, it collides and rubs against the baffles, thereby consuming energy and achieving the purpose of deceleration and pressure reduction. A large pressure drop can be achieved in a relatively small space, and the gas can be more evenly distributed in the channel, which is beneficial to subsequent steady flow and pressure regulation.

[0051] In some embodiments, the pressure reduction channel 211 can also be configured as a perforated plate pressure reduction channel 211. Specifically, a perforated plate is arranged in the channel, and many small holes are evenly distributed on the perforated plate. When the gas passes through these small holes, it will be subjected to resistance, thereby achieving pressure reduction. The perforated plate can be arranged in one layer or multiple layers, and the size, density and arrangement of the holes in each layer can be adjusted according to needs. When the gas passes through the small holes of the perforated plate, due to the throttling effect of the small holes, the flow rate of the gas will increase and the pressure will decrease. Multiple layers of perforated plates can further enhance the pressure reduction effect and enable the gas to be more evenly mixed and distributed. This structure is simple, easy to manufacture and maintain, and is suitable for occasions where the requirement for the pressure reduction effect is not particularly high.

[0052] In some embodiments, the pressure reduction channel 211 can also be configured as a spiral pressure reduction channel 211. Specifically, the pressure reduction channel 211 is designed in a spiral shape, and the gas flows in the spiral channel. The spiral channel can be of equal pitch or variable pitch, that is, the pitch gradually changes in the length direction of the channel. When the gas flows in the spiral channel, it will be affected by the centrifugal force, making the distribution of the gas in the channel more uniform. At the same time, the length of the spiral channel increases, the contact time of the gas with the channel wall is prolonged, and the frictional resistance increases, thereby achieving deceleration and pressure reduction. The spiral channel with variable pitch can more precisely control the pressure reduction process according to the change of the gas pressure.

[0053] In some embodiments, the intake unit 210 further includes a pressure sensor 212 disposed at the pressure reduction outlet 2112a. The pressure sensor 212 is used to monitor the gas pressure signal at the pressure reduction outlet 2112a in real time. The pressure sensor 212 is communicatively connected to the gas source, and the gas source adjusts the gas flow rate according to the gas pressure signal of the pressure sensor 212. Through the above arrangement, the gas flow rate is monitored and adjusted in real time. Specifically, the pressure sensor 212 is provided at the pressure reduction outlet 2112a to monitor the gas pressure signal in real time. The pressure sensor 212 is communicatively connected to the gas source, and the gas source adjusts the gas flow rate based on the pressure signal. If the pressure is too high, the gas source reduces the flow rate to prevent excessive local pressure; if the pressure is too low, the flow rate is increased to maintain the cooling effect and pressure stability, ensuring uniform pressure around the wire core 120 and guaranteeing the roundness of the cable.

[0054] Through the above arrangement, by providing the pressure sensor 212 at the pressure reduction outlet 2112a of the intake unit 210 and communicatively connecting it to the gas source, a mechanism for dynamically adjusting the gas flow rate is constructed, which plays a crucial role in ensuring the quality of cable production. Among them, in terms of real-time monitoring, the pressure sensor 212 is installed at the pressure reduction outlet 2112a, and can perform real-time and accurate monitoring of the gas pressure before entering the pipe cavity 110 after passing through the pressure reduction channel 211. During the cable production process, the gas pressure will fluctuate due to various factors such as the gas supply situation of the gas source and the change of internal resistance in the pipe cavity 110. Through the pressure sensor 212, the system can obtain the gas pressure signal at the pressure reduction outlet 2112a at any time, providing an accurate basis for subsequent adjustment and enabling the system to detect abnormal pressure conditions in a timely manner.

[0055] In terms of dynamic adjustment, the pressure sensor 212 is communicatively connected to the gas source. When the pressure sensor 212 monitors a pressure signal, it will transmit it to the gas source. The gas source adjusts the gas flow rate according to the received pressure signal. If the pressure is too high, it means that the gas entering the pipe cavity 110 may generate excessive pressure, causing uneven extrusion of the wire core 120. At this time, the gas source reduces the flow rate to reduce the amount of gas entering per unit time, thereby reducing the local pressure. On the contrary, if the pressure is too low, it may not be able to meet the cooling requirements of the cable or maintain pressure stability, and the gas source increases the flow rate to ensure the cooling effect and pressure stability. This dynamic adjustment mechanism can keep the gas pressure within an appropriate range at all times.

[0056] In terms of ensuring the roundness of the cable, during cable production, uneven pressure around the wire core 120 will cause it to be unevenly extruded, which will in turn affect the roundness of the cable and produce defective products. Through the real-time monitoring and adjustment of the gas flow rate by the pressure sensor 212, it is ensured that the gas pressure entering the pipe cavity 110 is stable and uniform, so that the pressure around the wire core 120 remains balanced.

[0057] In some embodiments, the gas outlet unit 220 includes an exhaust passage 221 provided on the quench pipe main body 100. The exhaust passage 221 is provided with an exhaust inlet 2211 and an exhaust outlet 2212. The exhaust inlet 2211 communicates with the pipe cavity 110, and the exhaust outlet 2212 communicates with the outside of the quench pipe main body 100. The cooling gas is discharged out successively through the exhaust inlet 2211 and the exhaust outlet 2212. Through the above arrangement, the exhaust inlet 2211 of the exhaust passage 221 is connected to the pipe cavity 110. After the cooling gas completes the cooling of the core 120, it enters the exhaust passage 221 through the exhaust inlet 2211. Then, the gas is discharged out of the quench pipe main body 100 through the exhaust outlet 2212, thereby constructing a complete cooling gas circulation path. This circulation ensures that new cooling gas can continuously enter the pipe cavity 110 to cool the core 120, maintaining a stable cooling effect and ensuring that the cable will not soften, deform, etc. due to heat accumulation during the production process. The exhaust passage 221 discharges the cooling gas in time to avoid excessive pressure caused by gas accumulation in the pipe cavity 110. If the cooling gas cannot be discharged smoothly, the pressure fluctuation will affect the cable quality and increase the defective rate.

[0058] The exhaust passage 221 discharges the cooling gas to the outside of the quench pipe main body 100, facilitating subsequent waste gas collection and treatment.

[0059] Specifically, the exhaust passage 221 is provided with a flange structure 2213, and the flange structure 2213 is hermetically connected to the outer wall of the quench pipe main body 100. Through the above arrangement, the flange structure 2213 is hermetically connected to the outer wall of the quench pipe main body 100, which can effectively prevent the leakage of the cooling gas. During the cable production process, the cooling gas needs to work under specific pressure and flow rate. If leakage occurs, it will not only affect the cooling effect and cause the cable to not be cooled properly, but may also lead to safety problems. The hermetic connection ensures that the gas flows along the specified path within the system and maintains the pressure stability within the pipe cavity 110. The flange connection method makes the connection between the exhaust passage 221 and the quench pipe main body 100 firm. When the cable production equipment is running, vibrations and displacements will occur. If the connection is unstable, it may cause the exhaust passage 221 to loosen or fall off, affecting the normal operation of the system. The flange structure 2213 tightly connects the exhaust passage 221 and the quench pipe main body 100 through connectors such as bolts, and can withstand a certain amount of external force, ensuring that the exhaust passage 221 always maintains a stable connection with the quench pipe main body 100 under complex working conditions and guaranteeing the reliability of the system operation. Using flange connection is convenient for disassembling and installing the exhaust passage 221 during equipment maintenance and repair. When it is necessary to clean, repair or replace components of the exhaust passage 221, only the bolts on the flange need to be removed to separate the exhaust passage 221 from the quench pipe main body 100. This convenient disassembly method can save maintenance time and cost, improve the equipment maintenance efficiency, reduce the production interruption time caused by equipment maintenance, and enhance the production efficiency of the enterprise.

[0060] Refer to Figure 2 and Figure 3 , in some embodiments, the gas outlet unit 220 includes a flow stabilizer plate 222 provided at the exhaust inlet 2211, and the flow stabilizer plate 222 is provided with a flow stabilizer opening 2221a for the cooling gas to pass through. The flow stabilizer opening 2221a on the flow stabilizer plate 222 allows the cooling gas to be discharged evenly, avoiding sudden pressure changes when the gas is discharged. The flow stabilizer plate 222 can sufficiently reduce the gas flow velocity, making the pressure inside the pipe cavity 110 tend to be stable, which is beneficial to fully protecting the cable product and making its roundness meet the production requirements.

[0061] With the above settings, the flow stabilizer plate 222 is arranged at the exhaust inlet 2211, and the flow stabilizing through-hole 2221a plays a role in diverting and rectifying the cooling gas. When the cooling gas flows from the pipe cavity 110 to the exhaust passage 221, the flow stabilizing through-hole 2221a allows the gas to pass through evenly, avoiding the concentrated discharge or disorderly flow of the gas, thereby effectively preventing pressure mutations when the gas is discharged. The flow stabilizer plate 222 can sufficiently reduce the gas flow velocity. During the cable production process, the rapid flow of the gas easily causes the internal pressure of the pipe cavity 110 to be unstable. However, the flow stabilizer plate 222 slows down the gas flow velocity by increasing the resistance to gas flow, making the internal pressure of the pipe cavity 110 tend to be stable. A stable pressure environment is crucial for the cooling and shaping of the cable core 120. It can ensure that the cooling gas acts evenly on the surface of the core 120, avoiding local over-cooling or under-cooling of the core 120 due to uneven pressure. Since the flow stabilizer plate 222 stabilizes the internal pressure of the pipe cavity 110, the pressure exerted on the cable core 120 during the cooling process is more uniform. Uneven pressure will cause the core 120 to be unevenly squeezed, resulting in insufficient roundness of the cable and defective products. The presence of the flow stabilizer plate 222 effectively avoids this situation, enabling the cable to maintain good roundness after cooling and meeting the production requirements.

[0062] Refer to Figure 4 , in some embodiments, the flow stabilizer plate 222 includes a flow stabilizing body 2221 and a rotating shaft 2222. The flow stabilizing through-hole 2221a is arranged on the flow stabilizing body 2221. The flow stabilizing body 2221 is fixedly connected to the rotating shaft 2222, and the rotating shaft 2222 is rotatably connected to the quench pipe body 100. The flow stabilizer plate 222 adjusts the swing angle through the rotation of the rotating shaft 2222 to change the size of the gap between the flow stabilizer plate 222 and the inner wall of the pipe cavity 110. Due to the adjustability of the flow stabilizer plate 222, the flow rate and velocity of the cold medium can be controlled, which is beneficial to the monitoring and adjustment of production.

[0063] Specifically, when the swing angle of the flow stabilizer plate 222 changes, the size of the gap also changes accordingly. When the gap becomes larger, the flow rate of the cold medium passing through the flow stabilizer plate 222 per unit time increases, and the velocity may also change correspondingly; when the gap becomes smaller, the flow rate and velocity of the cold medium will decrease. In this way, the precise control of the flow rate and velocity of the cold medium is achieved, meeting the requirements for the cooling effect under different production conditions. By real-time monitoring of the parameters during the production process, the operator can adjust the swing angle of the flow stabilizer plate 222 according to the actual situation to ensure that the flow rate and velocity of the cold medium are always in the optimal state. This precise adjustment can effectively maintain the stability of the pressure in the pipe cavity 110, ensure that the cable core 120 is not unevenly squeezed during the cooling process, improve the roundness and production quality of the cable, and at the same time help to promptly detect and solve problems occurring during the production process, improving production efficiency.

[0064] In some embodiments, the rotating shaft 2222 is connected to a driving motor 2222a, and the driving motor 2222a drives the rotating shaft 2222 to rotate. The driving motor 2222a provides power for the rotation of the flow stabilizing plate 222, realizing automatic control. It can be remotely operated through a control system or according to a preset program to quickly respond to production changes. For example, when the production speed of the cable or the specification of the wire core 120 changes, the angle of the flow stabilizing plate 222 can be adjusted in a timely manner to ensure the stability of the flow rate and velocity of the cooling gas, improving production efficiency and product quality. The driving motor 2222a can precisely control the rotation speed and angle of the rotating shaft 2222, and then accurately adjust the swing angle of the flow stabilizing plate 222 to change the size of the gap with the inner wall of the pipe cavity 110. This enables more precise control of the flow rate and velocity of the cooling gas to meet the requirements of different production processes. Precise control of the flow rate and velocity can maintain the stability of the pressure inside the pipe cavity 110, avoid uneven extrusion of the wire core 120, ensure the roundness of the cable, reduce defective products, and improve the economic benefits of the enterprise. The driving motor 2222a makes the adjustment of the flow stabilizing plate 222 more flexible, enhancing the adaptability of the quenching system to complex production environments.

[0065] In some embodiments, the driving motor 2222a is communicatively connected to the pressure sensor 212, and the driving motor 2222a adjusts the rotation of the flow stabilizing body 2221 according to the gas pressure signal of the pressure sensor 212. The driving motor 2222a adjusts its rotation according to the signal of the pressure sensor 212, further optimizing the stability and uniformity of gas discharge, ensuring the stability of the pressure inside the quenching system, and improving the roundness of the cable. Specifically, when the gas pressure fluctuates, the sensor quickly captures the signal and transmits it to the driving motor 2222a. For example, during cable production, a change in the gas supply from the gas source causes a pressure change. The sensor can sense it within an extremely short time, and the driving motor 2222a reacts according to the signal to achieve precise adjustment of the rotation of the flow stabilizing body 2221.

[0066] Refer to Figure 1 and Figure 2 , in some embodiments, the pressure reducing outlet 2112a and the exhaust inlet 2211 are both provided at the top of the quenching pipe main body 100, and the pressure reducing outlet 2112a is located at one axial end of the quenching pipe main body 100, and the exhaust inlet 2211 is located in the axial middle of the quenching pipe main body 100. Most of the gas enters from the upper port, and at the same time, the flow stabilizing plate 222 is used to reduce the gas jet at the center and lower part of the wire core 120. Through the above settings, the gas flow path and distribution are optimized to ensure uniform pressure inside the pipe cavity 110, thereby ensuring the cooling effect and roundness of the cable.

[0067] Specifically, the pressure relief outlet 2112a and the exhaust inlet 2211 are both arranged at the top of the quench pipe body 100. The pressure relief outlet 2112a is located at one axial end, and the exhaust inlet 2211 is located in the axial middle. This layout is conducive to forming a reasonable gas flow path. Most of the gas enters from the upper port and flows axially along the pipe cavity 110. During the process of cooling the core 120, it can more evenly cover the surface of the core 120, improving the cooling efficiency. At the same time, this setting makes the flow direction of the gas in the pipe cavity 110 relatively concentrated, avoiding the formation of turbulent flow of the gas in the pipe cavity 110, reducing the pressure fluctuation, and ensuring the stability of the cooling process.

[0068] In addition, a flow stabilizer plate 222 is used to reduce the gas jet at the center and lower part of the core 120. During the gas flow process, if there is a strong gas jet at the center and lower part of the core 120, it will cause uneven pressure distribution around the core 120. The pressure at the gas jet area is relatively small, while the pressure in other areas is relatively large. This pressure difference will cause the core 120 to be subjected to uneven pressure, thus affecting the roundness of the cable. The setting of the flow stabilizer plate 222 can change the gas flow direction, reduce the gas flow rate, make the gas more evenly distributed around the core 120, reduce the pressure difference caused by the gas jet, protect the core 120 from uneven extrusion during the cooling process, and ensure that the roundness of the cable meets the production requirements.

[0069] Through the above settings, on the one hand, it can ensure that the cooling gas fully and evenly contacts the core 120, achieving efficient cooling; on the other hand, it can effectively avoid the pressure problems caused by uneven gas flow, and ensure the roundness of the cable during the cooling process.

[0070] In some embodiments, the pressure relief outlet 2112a and the exhaust inlet 2211 are arranged on the same side of the axis of the core 120. The exhaust passage 221 of the air outlet unit 220 discharges the cooling gas, and the pressure relief outlet 2112a and the exhaust inlet 2211 are arranged on the same side, forming a reasonable gas circulation path, reducing gas turbulence and pressure fluctuation.

[0071] With the above settings, the pressure relief outlet 2112a and the exhaust inlet 2211 are arranged on the same side, which can build a smoother gas circulation path. The cooling gas enters the pipe cavity 110 from the pressure relief outlet 2112a. After cooling the line core 120, it can conveniently flow into the exhaust passage 221 through the exhaust inlet 2211 on the same side and be discharged. This same-side arrangement reduces the tortuous flow of gas in the pipe cavity 110, making the gas flow direction more definite and concentrated, improving the efficiency of gas circulation, ensuring that new cooling gas can continuously and efficiently enter the pipe cavity 110 to cool the line core 120, and maintaining a stable cooling effect. When the gas flows in the pipe cavity 110, if the inlet and outlet positions are unreasonable, it is easy to form turbulence, resulting in disordered gas flow. The design with the pressure relief outlet 2112a and the exhaust inlet 2211 on the same side can effectively avoid this situation. The same-side arrangement makes the gas flow more orderly, reduces the mutual collision and interference between gases, and reduces the possibility of turbulence generation. A stable gas flow state helps to improve the uniformity of the cooling effect, avoiding uneven local cooling of the line core 120 caused by turbulence and affecting the quality of the cable. In addition, gas turbulence will cause pressure fluctuations, which will have an adverse impact on the cable line core 120, resulting in uneven extrusion on it, and then affecting the roundness of the cable. By reducing gas turbulence, this design effectively reduces pressure fluctuations. A stable pressure environment is crucial for cable production, ensuring that the line core 120 is under uniform pressure during the cooling process.

[0072] Refer to Figure 1 , in some embodiments, the rapid cooling system for power cables further includes a temperature sensor 400 disposed in the pipe cavity 110. The temperature sensor 400 is used to monitor the temperature signal in the pipe cavity 110 in real time; the temperature sensor 400 is communicatively connected to the gas source, and the gas source adjusts the gas supply flow rate according to the temperature signal of the temperature sensor 400.

[0073] With the above settings, when the temperature sensor 400 detects that the temperature in the pipe cavity 110 is too high, it means that the cable material may be overly softened, affecting the shape and size of the cable. At this time, the gas source will increase the gas supply flow rate and the supply amount of the cooling gas, so as to accelerate the heat removal speed and lower the temperature. On the contrary, if the temperature is too low, the cable material may be overly shrunk, and the gas source will reduce the gas supply flow rate and the amount of the cooling gas to avoid the temperature dropping too low. Through this real-time adjustment mechanism, the temperature in the pipe cavity 110 can be maintained within a suitable range. Through the coordinated operation of the temperature sensor 400 and the gas source, the cable material is prevented from being overly softened at high temperatures or overly shrunk at low temperatures. In a suitable temperature environment, the cable material can maintain good physical properties, and its shape and size are stable.

[0074] Refer to Figure 1, in some embodiments, the quenching system for power cables further includes an exhaust gas collection mechanism 300. The exhaust gas collection mechanism 300 is connected to the air outlet unit 220 and is used to collect the discharged cooling gas. The exhaust gas collection mechanism 300 can effectively collect and filter the exhaust gas generated during the production process, ensuring the cleanliness and safety of the production environment. Specifically, the exhaust gas collection mechanism 300 includes a collector 320 and a collection pipe 310. The collector 320 is connected to the exhaust outlet 2212 of the air outlet unit 220 through the collection pipe 310.

[0075] With the above arrangement, the exhaust gas collection mechanism 300 is connected to the air outlet unit 220 to collect these discharged cooling gases, forming a complete closed loop in the gas circulation process of the entire quenching system. It ensures that the cooling gas is not directly discharged into the production environment, maintains the orderly flow of gas inside the system, and guarantees the stable operation of the quenching system.

[0076] In terms of environmental protection, the exhaust gas collection mechanism 300 plays a key role in treating the exhaust gas generated during the production process. During the cable production process, after the cooling gas contacts the core 120, it may carry heat, impurities, etc. If directly discharged, these exhaust gases will pollute the production environment, affect the air quality in the workshop, and may also cause corrosion to the production equipment. The exhaust gas collection mechanism 300 can effectively remove impurities such as dust and debris in the exhaust gas through a filtering device. Even if a small amount of the purified gas leaks, it will not have a great impact on the environment, keeping the production workshop clean, providing a healthy working environment for the operators, and also being beneficial to extending the service life of the equipment. From a safety perspective, some cooling gases may have flammable, explosive, or toxic and harmful properties. For example, in the production of certain special cables, the cooling gas may contain volatile organic compounds, etc. The exhaust gas collection mechanism 300 collects these exhaust gases centrally, preventing them from accumulating in the production workshop and forming potential safety hazards. Through filtering and treatment, the risks of safety accidents such as fires, explosions, and personnel poisoning are reduced, ensuring the safe progress of production activities.

[0077] Refer to Figure 1 , in some embodiments, the quenching system for power cables is installed between the head 500 and the side deviation meter 600. The core 120 passes through the head 500, the quenching system for power cables, the side deviation meter 600, and the vulcanizing tube 700 in sequence, which can effectively control the roundness of the core 120. The side deviation meter is used to calibrate eccentricity. The vulcanizing tube 700 is an enclosed space for vulcanizing the core 120. During the vulcanization process, the core 120 undergoes a series of chemical reactions, and its surface and internal structure change, enhancing its heat resistance, insulation performance, and mechanical properties. Specifically, a gas inlet 710 is provided at the bottom of the vulcanizing tube 700. The gas source is connected to the gas inlet 710 and supplies gas to the pressure reduction channel 211 in sequence through the gas inlet 710, the vulcanizing tube 700, and the side deviation meter 600.

[0078] With the above settings, after the wire core 120 is extruded and formed by the head 500, it has a relatively high temperature and its shape has not been fully stabilized. Directly entering the subsequent processes may result in poor roundness due to temperature and stress problems. The rapid cooling system can quickly cool the wire core 120, enabling it to reach an appropriate temperature within a short time and stabilize its shape. By precisely controlling parameters such as the pressure and flow rate of the cooling gas, the pressure around the wire core 120 is ensured to be uniform, effectively avoiding deformation caused by uneven pressure, thereby controlling its roundness and providing a wire core 120 with stable quality for the subsequent processes.

[0079] Among them, the side deviation instrument 600 is used to adjust the position of the wire core 120, while the deviation measuring instrument monitors the eccentricity of the wire core 120 in real time and calibrates it. After the wire core 120 cooled by the rapid cooling system enters the side deviation instrument 600, the shape of the wire core 120 has been initially stabilized, making it more convenient for position adjustment and eccentricity calibration. The deviation measuring instrument sends a signal according to the actual situation of the wire core 120, and the side deviation instrument 600 fine-tunes its position accordingly, further improving the roundness and quality of the wire core 120.

[0080] During the vulcanization process, chemical reactions occur on the surface and inside the structure of the wire core 120, thereby enhancing its heat resistance, insulation performance, and mechanical properties. The wire core 120 cooled and preliminarily shaped by the rapid cooling system enters the vulcanization pipe 700, which can better adapt to the temperature and pressure changes during the vulcanization process, ensure the uniform progress of the vulcanization reaction, and improve the vulcanization effect. At the same time, a gas inlet 710 is provided at the bottom of the vulcanization pipe 700, and the gas source supplies gas to the pressure reduction channel 211 of the rapid cooling system through the gas inlet 710, the vulcanization pipe 700, and the side deviation instrument 600, forming a complete gas supply cycle to ensure a stable source of cooling gas for the rapid cooling system and maintain its normal operation.

[0081] The working principle of the rapid cooling system for power cables in some embodiments of this application is as follows:

[0082] First, under the guidance of the set process parameters, the power cable production line starts. The conductor is introduced into the main body of the head 500, and the PP material is extruded from the three-layer co-extrusion head 500. Through precise extrusion, the wire core 120 is gradually formed. This process requires precise control of temperature, pressure, and speed to ensure that the size and shape of the wire core 120 meet the requirements. Among them, the cable cooling temperature is 150°C; the nitrogen pressure is 10 mpa.

[0083] The extruded wire core 120 then enters the pipe cavity 110, which is used to control the flow and direction of the wire core 120. A precise flow guiding device is provided inside the main body 100 of the rapid cooling pipe to ensure that the wire core 120 can pass through stably.

[0084] Nitrogen enters the vulcanization pipe 700 from the gas inlet 710 and enters the pipe cavity 110 through the pressure reduction channel 211. These nitrogen gases first slow down through the pressure reduction channel 211 and are monitored by the pressure sensor 212. Then, when flowing through the flow stabilizing plate 222, the flow rate and direction are appropriately adjusted, thereby maintaining the pressure balance inside the pipe cavity 110. This balanced pressure environment is crucial for protecting the fragile core 120 and can prevent the core 120 from being damaged or deformed during the production process;

[0085] The nitrogen gas after cooling the core 120 will be discharged from the exhaust channel 221 and then enter the waste gas collection mechanism 300. After completing this series of steps, the core 120 is processed by the quenching system for power cables, and its temperature is rapidly reduced. The cooled core 120 then enters the deviation measuring instrument to calibrate the eccentricity and then passes through the vulcanization pipe 700. After the vulcanization treatment, the core 120 completes the entire production process and is ready to enter the next stage of application or further processing. After the production is completed, a section of the core 120 is intercepted, peeled off and inspected to determine whether its roundness meets the preset requirements.

[0086] The quenching system for power cables provided by the embodiments of the present application takes various measures. By precisely controlling the pressure and flow rate of the cooling gas, as well as optimizing the gas flow path and discharge method, it ensures that the pressure in the quenching pipe cavity 110 is uniform, thereby effectively preventing the core 120 from being unevenly squeezed due to the pressure difference and guaranteeing the roundness of the cable. At the same time, it has high cooling efficiency, a long service life, is convenient for cleaning dust accumulation, and has a low equipment maintenance rate.

[0087] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered to be within the scope described in this specification.

[0088] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A quenching system for power cables, characterized in that: include: A chilling pipe body, wherein a pipe cavity is arranged in the chilling pipe body, and the pipe cavity is used for the wire core to pass through; A cooling gas circulation mechanism, the cooling gas circulation mechanism includes an air inlet unit and an air outlet unit arranged on the quenching pipe body, the air inlet unit and the air outlet unit are respectively connected to the pipe cavity, and are used to inject and discharge cooling gas into the pipe cavity; the air inlet unit includes a decompression channel arranged on the quenching pipe body, the decompression channel is provided with a decompression inlet and a decompression outlet, the decompression inlet is connected to a gas source, the decompression outlet is connected to the pipe cavity, and after the cooling gas passes through the decompression channel, the gas pressure at the decompression outlet is less than the gas pressure at the decompression inlet.

2. The quenching system for power cable according to claim 1, characterized in that: The decompression channel includes a first channel and a second channel, the first channel and the second channel are connected, and a corner structure is provided at the connection point.

3. The quenching system for power cable according to claim 1, characterized in that: The air intake unit further comprises a pressure sensor disposed at the decompression outlet, and the pressure sensor is used to monitor the gas pressure signal at the decompression outlet in real time; The pressure sensor is in communication connection with the gas source, and the gas source adjusts the gas supply flow rate according to the gas pressure signal of the pressure sensor.

4. The quenching system for power cable according to claim 3, characterized in that: The air outlet unit includes an exhaust channel arranged on the quenching pipe body, the exhaust channel is provided with an exhaust inlet and an exhaust outlet, the exhaust inlet is connected to the pipe cavity, and the exhaust outlet is connected to the outside of the quenching pipe body, and the cooling gas is discharged through the exhaust inlet and the exhaust outlet in sequence.

5. The quenching system for power cable according to claim 4, characterized in that: The gas outlet unit comprises a flow stabilizing plate arranged at the exhaust inlet, and the flow stabilizing plate is provided with a flow stabilizing opening for the cooling gas to pass through.

6. The quenching system for power cable according to claim 5, characterized in that: The flow stabilizing plate comprises a flow stabilizing body and a rotating shaft, the flow stabilizing opening is arranged on the flow stabilizing body, the flow stabilizing body is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the quenching pipe body.

7. The quenching system for power cable according to claim 6, characterized in that: The rotating shaft is connected to a driving motor, and the driving motor drives the rotating shaft to rotate; The driving motor is in communication connection with the pressure sensor, and the driving motor adjusts the rotation of the flow stabilizing body according to the gas pressure signal of the pressure sensor.

8. The quenching system for power cable according to claim 4, characterized in that: The decompression outlet and the exhaust inlet are arranged on the same side of the core in the axial direction.

9. The quenching system for power cable according to claim 1, characterized in that: The power cable quenching system further comprises a temperature sensor disposed in the pipe cavity, wherein the temperature sensor is used to monitor the temperature signal in the pipe cavity in real time; The temperature sensor is in communication connection with the gas source, and the gas source adjusts the gas supply flow rate according to the temperature signal of the temperature sensor.

10. The quenching system for power cable according to claim 1, characterized in that: The quenching system for power cables further comprises an exhaust gas collecting mechanism, which is connected to the gas outlet unit and is used for collecting the exhausted cooling gas.

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