Quenching system for power cable

Abstract

The utility model 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 field of cable production equipment technology, and in particular to a quenching system for power cables. Background Technology

[0002] With the continuous growth of society's demand for electricity, the performance and reliability of power cables, as the main power transmission equipment, are of paramount importance. PP cable, or polypropylene cable, is a type of cable widely used in the field of power transmission. It uses polypropylene material as its key component. In the production process of PP power cables, three-layer co-extrusion technology is widely used. This technology simultaneously extrudes the inner and outer semiconductive layers and the insulation layer to form a tightly bonded cable structure, effectively improving the cable's initial free discharge voltage and overall performance.

[0003] However, in existing quench systems, the flow rate and velocity of nitrogen are difficult to control precisely during the cooling process, resulting in uneven pressure distribution inside the quencher and a significant pressure difference around the cable core. This pressure difference causes uneven compression of the core, leading to insufficient cable roundness, defective products, and increased material waste and cost during production. Utility Model Content

[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] Embodiments of this application disclose a quenching system for power cables, comprising:

[0006] The cooling pipe body has a pipe cavity inside, through which the wire core passes;

[0007] A cooling gas circulation mechanism includes an inlet unit and an outlet unit disposed on the main body of the quenching pipe. The inlet unit and the outlet unit are respectively connected to the pipe cavity for injecting and discharging cooling gas into and out of the pipe cavity. The inlet unit includes a pressure reducing channel disposed on the main body of the quenching pipe. The pressure reducing channel is provided with a pressure reducing inlet and a pressure reducing outlet. The pressure reducing inlet is connected to a gas source, and the pressure reducing outlet is connected to the pipe cavity. After passing through the pressure reducing channel, the gas pressure at the pressure reducing outlet is lower than the gas pressure at the pressure reducing inlet.

[0008] In one embodiment, the pressure relief 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.

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

[0010] The pressure sensor is communicatively connected to the gas source, and the gas source adjusts the gas supply speed according to the gas pressure signal from the pressure sensor.

[0011] In one embodiment, the exhaust unit includes an exhaust channel disposed on the main body of the quenching pipe. 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 main body of the quenching pipe. The cooling gas is discharged sequentially through the exhaust inlet and the exhaust outlet.

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

[0013] In one embodiment, the flow stabilizer plate includes a flow stabilizer body and a rotating shaft. The flow stabilizer outlet is disposed on the flow stabilizer body. The flow stabilizer body is fixedly connected to the rotating shaft, and the rotating shaft is rotatably connected to the quench pipe body.

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

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

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

[0017] In one embodiment, the power cable cooling system further includes a temperature sensor disposed within the pipe cavity, the temperature sensor being used to monitor the temperature signal within the pipe cavity in real time;

[0018] The temperature sensor is communicatively connected to the gas source, and the gas source adjusts the gas supply speed according to the temperature signal from the temperature sensor.

[0019] In one embodiment, the power cable cooling system further includes a waste gas collection mechanism connected to the exhaust unit for collecting the discharged cooling gas.

[0020] According to the power cable cooling system of the embodiment of this application, after the cooling gas passes through the pressure reducing channel, the pressure at the pressure reducing outlet is less than that at the pressure reducing inlet, so that the gas pressure entering the pipe cavity is stabilized within a suitable range. While meeting the cable cooling requirements, it can effectively reduce the problem of cable irregularity caused by uneven pressure inside the pipe, which is conducive to improving the qualification rate of PP cable production. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a power cable cooling system according to an embodiment of this application.

[0022] Figure 2 This is a partial structural schematic diagram of a power cable cooling system according to an embodiment of this application.

[0023] Figure 3 This is a schematic diagram of the current stabilizing plate in a power cable quenching system according to an embodiment of this application.

[0024] Figure 4 This is a cross-sectional view of a current-stabilizing plate in a power cable quenching system according to an embodiment of this application.

[0025] Figure label:

[0026] 100. Cooling pipe body; 110. Pipe cavity; 120. Wire core;

[0027] 200. Cooling gas circulation mechanism; 210. Inlet unit; 211. Pressure reducing channel; 2111. First channel; 2111a. Pressure reducing inlet; 2112. Second channel; 2112a. Pressure reducing outlet; 212. Pressure sensor; 220. Outlet unit; 221. Exhaust channel; 2211. Exhaust inlet; 2212. Exhaust outlet; 2213. Flange structure; 222. Flow stabilizer; 2221. Flow stabilizer body; 2221a. Flow stabilizer port; 2222. Rotating shaft; 2222a. Drive motor;

[0028] 300. Waste gas collection mechanism; 310. Collection pipe; 320. Collector;

[0029] 400. Temperature sensor;

[0030] 500, machine head;

[0031] 600. Side deflector;

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

[0033] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

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

[0035] Furthermore, where the terms "first" and "second" appear, these terms are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, where the term "multiple" appears, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0036] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0037] In this application, unless otherwise expressly specified and limited, the use of descriptions such as "above" or "below" the second feature indicates that the first and second features are in direct contact or indirect contact via an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. Similarly, "below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0038] It should be noted that if an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening 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 intervening element. If so, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application are for illustrative purposes only and do not represent the only possible implementation.

[0039] See Figure 1 and Figure 2 At least one embodiment of this application discloses a quenching system for power cables. The quenching system includes a quenching pipe body 100 and a cooling gas circulation mechanism 200. A pipe cavity 110 is provided inside the quenching pipe body 100, through which the wire core 120 passes. The cooling gas circulation mechanism 200 includes an air inlet unit 210 and an air outlet unit 220 disposed on the quenching pipe body 100, and the air inlet unit 210 and the air outlet unit 220 are respectively connected to the pipe cavity 110. The air intake unit 210 is used to inject and discharge cooling gas into the pipeline cavity 110. The air intake unit 210 includes a pressure reducing channel 211 disposed on the quench pipeline 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 connected to the pipeline 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] The pipe cavity 110 provides space for the conductor 120 to pass through, where it undergoes cooling and other treatment processes during cable production. The air intake unit 210 injects cooling gas into the pipe cavity 110, while the air outlet unit 220 discharges the used cooling gas. These two units work together to ensure the circulating flow of cooling gas within the system. The pressure-reducing channel 211 in the air intake unit 210 has a pressure-reducing inlet 2111a and a pressure-reducing outlet 2112a, which are connected to the gas source and the pipe cavity 110 respectively, regulating 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 air intake unit 210, carrying away heat from the conductor 120 and achieving a cooling effect. This ensures that the cable does not soften or deform due to high temperatures during production, guaranteeing the cable's structural stability. The pressure-reducing channel 211 lowers the pressure of the cooling gas as it enters the pipe cavity 110, preventing excessive pressure from impacting the conductor 120. By reducing the gas pressure at the pressure reducing outlet 2112a, the gas pressure entering the pipe cavity 110 is stabilized within a suitable range, effectively reducing the uneven compression of the wire core 120 caused by uneven pressure inside the pipe, improving the roundness of the cable, and thus increasing the pass rate of PP cable production.

[0041] According to the power cable cooling system of the embodiment of this application, after the cooling gas passes through the pressure reducing channel 211, the pressure at the pressure reducing outlet 2112a is less than that at the pressure reducing inlet 2111a, so that the gas pressure entering the pipe cavity 110 is stabilized within a suitable range. While meeting the cable cooling requirements, it can effectively reduce the problem of cable irregularity caused by uneven pressure inside the pipe, which is conducive to improving the qualification rate of PP cable production.

[0042] In some embodiments, nitrogen or similar gases can be used as the cooling gas. Specifically, nitrogen is chemically stable, relatively inexpensive, readily available, and meets the cooling requirements of cables, making it an ideal choice for cooling. During cable cooling, it does not readily react chemically with cable materials, thus avoiding adverse effects on the cable's structure and performance. This characteristic ensures the stability of the cable's quality during cooling, preventing corrosion, aging, and other problems caused by gas-to-cable material reactions, thereby extending the cable's service life. In high-temperature environments, some other gases may react with the cable's insulation or conductor, affecting its insulation and conductivity, while nitrogen effectively prevents this. Nitrogen is abundant in air, relatively easy to obtain, and inexpensive. Using nitrogen as a cooling gas in large-scale cable production can reduce production costs. Compared to some rare or special gases, nitrogen has a significant price advantage, making its use as a cooling gas in industrial production highly cost-effective. Nitrogen has excellent cooling performance, effectively absorbing the heat generated by the cable and achieving rapid cooling. Its moderate specific heat capacity allows it to quickly remove heat from the cable when absorbing heat, thus rapidly reducing the cable temperature and meeting the cooling efficiency requirements of the quenching system. Simultaneously, nitrogen's good thermal conductivity ensures that heat is evenly transferred from the cable to the nitrogen, preventing localized overheating and guaranteeing uniform cooling.

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

[0044] In some embodiments, the pressure relief channel 211 includes a first channel 2111 and a second channel 2112, which are connected and have a corner structure at the connection point. The first channel 2111 and the second channel 2112 intersect each other axially.

[0045] The above configuration alters the gas flow path as it passes through the pressure-reducing channel 211. The corner structure increases the resistance to gas flow, which helps reduce the gas velocity and allows the gas pressure to gradually decrease during flow, preventing high-pressure gas from directly impacting the wire core 120 inside the pipe cavity 110.

[0046] In some embodiments, a pressure-reducing inlet 2111a is disposed on a first channel 2111, and a pressure-reducing outlet 2112a is disposed on a second channel 2112. Furthermore, the radial dimension of the first channel 2111 is smaller than the radial dimension of the second channel 2112.

[0047] Specifically, the pressure-reducing inlet 2111a is located in the first channel 2111, where gas enters the pressure-reducing channel 211. The diameter of the first channel 2111 is smaller than that of the second channel 2112. According to fluid mechanics principles, when gas flows from the smaller radial channel 2111 into the larger radial channel 2112, the gas velocity decreases, and the pressure decreases accordingly. This change in pipe diameter further enhances the pressure-reducing effect of the pressure-reducing channel 211, ensuring that the pressure of the cooling gas is stabilized at a low and suitable range when it reaches the pressure-reducing outlet 2112a. This prevents excessive pressure from impacting the wire core 120, effectively reducing cable roundness issues caused by uneven pressure and improving the yield rate of PP cable production.

[0048] The smaller diameter first channel 2111 restricts the gas flow rate, resulting in a relatively fast flow. When the gas enters the larger diameter second channel 2112, the flow rate decreases, and the flow becomes more stable. A stable gas flow rate is crucial for maintaining stable pressure within the pipe cavity 110. Unstable gas flow will cause pressure fluctuations, affecting cable cooling performance and roundness. This pipe diameter design helps ensure that cooling gas enters the pipe cavity 110 at a stable speed, providing a uniform cooling environment for the cable and ensuring stability and quality during cable production.

[0049] It is understood that the pressure-reducing channel 211 is not limited to the form of the embodiments described above. In some embodiments, the pressure-reducing channel 211 can be configured as a multi-stage series pressure-reducing channel 211, with multiple pressure-reducing channels 211 connected in series. Each pressure-reducing channel 211 can be a simple straight pipe section, with channels connected by a diameter-changing structure or a throttling device. For example, gas first enters a first-stage pressure-reducing channel 211 with a larger pipe diameter, and then enters a second-stage pressure-reducing channel 211 with a smaller pipe diameter through a constriction, and so on, forming a multi-stage pressure reduction. When gas flows in channels with different pipe diameters, according to the principles of fluid mechanics, changes in pipe diameter will lead to changes in gas velocity and pressure. Multi-stage series connection can achieve multiple pressure reductions, making pressure changes more stable and avoiding the impact of sudden pressure changes on the system. At the same time, this structure can adjust the number of stages and pipe diameter according to actual needs to adapt to different pressure reduction requirements.

[0050] In some embodiments, the pressure-reducing channel 211 can also be configured as a labyrinthine pressure-reducing channel 211, designed in a labyrinthine shape. Multiple baffles or partitions are installed within the pressure-reducing channel 211, causing the gas to continuously change its flow direction within the channel, forming a tortuous flow path. These baffles can be arranged perpendicular to the channel axis or inclined at a certain angle. When the gas flows in the labyrinthine channel, it collides and rubs against the baffles due to the continuous change in direction, thereby consuming energy and achieving the purpose of deceleration and pressure reduction. A large pressure drop is achieved in a small space, and the gas can be more evenly distributed within the channel, which is beneficial for subsequent flow stabilization and pressure regulation.

[0051] In some embodiments, the pressure-reducing channel 211 can also be configured as a perforated plate pressure-reducing channel 211. Specifically, a perforated plate with numerous small holes evenly distributed within the channel is provided. Gas encounters resistance as it passes through these holes, thus achieving pressure reduction. The perforated plate can be provided in one or more layers, and the size, density, and arrangement of the holes in each layer can be adjusted as needed. When gas passes through the small holes of the perforated plate, the gas velocity increases and the pressure decreases due to the throttling effect of the holes. Multiple layers of perforated plates can further enhance the pressure-reducing effect and enable more uniform mixing and distribution of the gas. This structure is simple, easy to manufacture and maintain, and suitable for applications where the pressure-reducing effect requirements are not particularly high.

[0052] In some embodiments, the pressure-reducing channel 211 can also be configured as a spiral pressure-reducing channel 211. Specifically, the pressure-reducing channel 211 is designed in a spiral shape, and the gas flows within the spiral channel. The spiral channel can be of constant pitch or variable pitch, meaning the pitch gradually changes along the length of the channel. When the gas flows within the spiral channel, it is subjected to centrifugal force, making the gas distribution within the channel more uniform. Simultaneously, the increased length of the spiral channel prolongs the contact time between the gas and the channel wall, increasing frictional resistance, thereby achieving deceleration and pressure reduction. The variable pitch spiral channel can more precisely control the pressure reduction process based on changes in gas pressure.

[0053] In some embodiments, the air intake unit 210 further includes a pressure sensor 212 disposed at the pressure reducing outlet 2112a. The pressure sensor 212 is used to monitor the gas pressure signal at the pressure reducing outlet 2112a in real time. The pressure sensor 212 is communicatively connected to the gas source, and the gas source adjusts the gas supply flow rate according to the gas pressure signal from the pressure sensor 212. Through the above configuration, the gas flow rate is monitored and adjusted in real time. Specifically, a pressure sensor 212 is disposed at the pressure reducing 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 supply flow rate according to 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 pressure balance around the core 120 and guaranteeing the roundness of the cable.

[0054] With the above setup, a pressure sensor 212 is installed at the pressure-reducing outlet 2112a of the air intake unit 210 and connected to the gas source, establishing a mechanism for dynamically adjusting the gas flow rate, which plays a crucial role in ensuring the quality of cable production. Specifically, for real-time monitoring, the pressure sensor 212, installed at the pressure-reducing outlet 2112a, can accurately monitor the gas pressure before it enters the pipe cavity 110 after passing through the pressure-reducing channel 211. During cable production, the gas pressure fluctuates due to various factors such as the gas supply and changes in the internal resistance of the pipe cavity 110. Through the pressure sensor 212, the system can acquire the gas pressure signal at the pressure-reducing outlet 2112a at any time, providing accurate data for subsequent adjustments and enabling the system to promptly detect abnormal pressure conditions.

[0055] In terms of dynamic adjustment, the pressure sensor 212 is communicatively connected to the gas source. When the pressure sensor 212 detects a pressure signal, it transmits it to the gas source. The gas source adjusts the gas supply speed based on 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 compression of the wire core 120. In this case, the gas source reduces the flow rate, reducing the amount of gas entering per unit time, thereby reducing the local pressure. Conversely, if the pressure is too low, it may not be able to meet the cooling requirements of the cable or maintain pressure stability. The gas source increases the flow rate to ensure cooling effect and pressure stability. This dynamic adjustment mechanism ensures that the gas pressure is always kept within a suitable range.

[0056] Regarding ensuring cable roundness, during cable production, uneven pressure around the conductor 120 can cause uneven compression, thus affecting the cable's roundness and resulting in defective products. By using pressure sensor 212 to monitor and adjust the gas flow rate in real time, the gas pressure entering the pipe cavity 110 is ensured to be stable and uniform, maintaining a balanced pressure around the conductor 120.

[0057] In some embodiments, the exhaust unit 220 includes an exhaust channel 221 disposed on the cooling pipe body 100. The exhaust channel 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 cooling pipe body 100. Cooling gas is discharged sequentially through the exhaust inlet 2211 and the exhaust outlet 2212. With the above arrangement, the exhaust inlet 2211 of the exhaust channel 221 is connected to the pipe cavity 110. After the cooling gas completes the cooling of the wire core 120, it enters the exhaust channel 221 through the exhaust inlet 2211. Then, the gas is discharged to the outside of the cooling pipe 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 wire core 120, maintain a stable cooling effect, and ensure that the cable will not soften or deform due to heat accumulation during the production process. Exhaust channel 221 promptly discharges cooling gas to prevent gas accumulation in pipe cavity 110, which could lead to excessive pressure. If the cooling gas cannot be discharged smoothly, pressure fluctuations will affect cable quality and increase the defect rate.

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

[0059] Specifically, the exhaust channel 221 is equipped with a flange structure 2213, which is sealed to the outer wall of the quenching pipe body 100. This sealing connection effectively prevents cooling gas leakage. During cable production, the cooling gas must operate at specific pressures and flow rates. Leakage not only affects the cooling effect, preventing the cable from cooling properly, but may also cause safety issues. The sealed connection ensures that the gas flows along a prescribed path within the system, maintaining stable pressure within the pipe cavity 110. The flange connection ensures a secure connection between the exhaust channel 221 and the quenching pipe body 100. During cable production equipment operation, vibrations and displacements occur. Unstable connections may cause the exhaust channel 221 to loosen or detach, affecting normal system operation. The flange structure 2213, using bolts and other fasteners, tightly connects the exhaust channel 221 to the quenching pipe body 100, withstanding certain external forces. This ensures that even in complex working environments, the exhaust channel 221 remains stably connected to the quenching pipe body 100, guaranteeing system reliability. The flange connection facilitates the disassembly and installation of the exhaust channel 221 during equipment maintenance and repair. When cleaning, repairing, or replacing parts of the exhaust channel 221 is required, simply removing the bolts on the flange allows the exhaust channel 221 to be separated from the quench pipe body 100. This convenient disassembly method saves maintenance time and costs, improves equipment maintenance efficiency, reduces production downtime caused by equipment maintenance, and enhances enterprise production efficiency.

[0060] See Figure 2 and Figure 3 In some embodiments, the exhaust unit 220 includes a flow stabilizer 222 disposed at the exhaust inlet 2211, and the flow stabilizer 222 is provided with a flow stabilizing port 2221a for cooling gas to pass through. The flow stabilizing port 2221a on the flow stabilizer 222 ensures that the cooling gas is discharged evenly, avoiding pressure surges during gas discharge. The flow stabilizer 222 can effectively reduce the gas flow velocity, making the internal pressure of the pipe cavity 110 tend to be stable, which is beneficial to fully protect the cable product and ensure that its roundness meets production requirements.

[0061] With the above configuration, the flow stabilizer 222 is positioned at the exhaust inlet 2211, and the flow stabilizer 2221a serves to divert and rectify the cooling gas. When the cooling gas flows from the pipe cavity 110 to the exhaust channel 221, the flow stabilizer 2221a ensures uniform gas flow, preventing concentrated gas discharge or disordered flow, thus effectively preventing pressure surges during gas discharge. The flow stabilizer 222 significantly reduces the gas flow velocity. During cable production, rapid gas flow can easily lead to unstable pressure inside the pipe cavity 110. The flow stabilizer 222, by increasing the resistance to gas flow, slows down the gas flow velocity, stabilizing the pressure inside the pipe cavity 110. A stable pressure environment is crucial for the cooling and shaping of the cable core 120, ensuring that the cooling gas acts uniformly on the surface of the core 120, preventing uneven pressure from causing localized excessively rapid or slow cooling of the core 120. Because the pressure stabilizing plate 222 stabilizes the pressure inside the pipe cavity 110, the cable core 120 experiences more uniform pressure during cooling. Uneven pressure would cause the core 120 to be subjected to uneven compression, resulting in insufficient cable roundness and defective products. The presence of the pressure stabilizing plate 222 effectively avoids this situation, ensuring that the cable maintains good roundness after cooling, meeting production requirements.

[0062] See Figure 4 In some embodiments, the flow stabilizer 222 includes a flow stabilizer body 2221 and a rotating shaft 2222. A flow stabilizer port 2221a is disposed on the flow stabilizer body 2221. The flow stabilizer 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 222 adjusts its swing angle by rotating the rotating shaft 2222, thereby changing the size of the gap between the flow stabilizer 222 and the inner wall of the pipe cavity 110. Due to the adjustability of the flow stabilizer 222, the flow rate and velocity of the cooling medium can be controlled, which is beneficial for production monitoring and adjustment.

[0063] Specifically, when the swing angle of the flow stabilizer 222 changes, the gap size also changes accordingly. When the gap increases, the flow rate of the cold medium passing through the flow stabilizer 222 per unit time increases, and the flow velocity may also change accordingly; when the gap decreases, the flow rate and velocity of the cold medium decrease. This achieves precise control of the flow rate and velocity of the cold medium, meeting the cooling effect requirements under different production conditions. By monitoring the parameters in the production process in real time, operators can adjust the swing angle of the flow stabilizer 222 according to the actual situation to ensure that the flow rate and velocity of the cold medium are always at the optimal state. This precise adjustment can effectively maintain the stability of the pressure inside the pipe cavity 110, ensuring that the cable core 120 is not subjected to uneven compression during the cooling process, improving the roundness and production quality of the cable, and also helping to promptly detect and solve problems that occur in the production process, thereby improving production efficiency.

[0064] In some embodiments, the rotating shaft 2222 is connected to a drive motor 2222a, which drives the rotating shaft 2222 to rotate. The drive motor 2222a provides power for the rotation of the flow stabilizer 222, enabling automated control. It can be operated remotely or according to a preset program via the control system, quickly responding to production changes. For example, when the cable production speed or the specifications of the core 120 change, the angle of the flow stabilizer 222 can be adjusted in a timely manner to ensure stable cooling gas flow rate and velocity, improving production efficiency and product quality. The drive motor 2222a can precisely control the rotation speed and angle of the rotating shaft 2222, thereby precisely adjusting the swing angle of the flow stabilizer 222 and changing the size of the gap with the inner wall of the pipe cavity 110. This makes the cooling gas flow rate and velocity control more precise, meeting the needs of different production processes. Precise flow rate and velocity control can maintain stable pressure within the pipe cavity 110, preventing uneven compression of the core 120, ensuring cable roundness, reducing defective products, and improving enterprise economic benefits. The drive motor 2222a makes the flow stabilizer 222 more flexible in adjustment, enhancing the adaptability of the quenching system to complex production environments.

[0065] In some embodiments, the drive motor 2222a is communicatively connected to the pressure sensor 212, and the drive motor 2222a adjusts the rotation of the flow stabilizing body 2221 according to the gas pressure signal from the pressure sensor 212. Adjusting its rotation based on the pressure sensor signal further optimizes the stability and uniformity of gas discharge, ensuring stable pressure within the quenching system and improving cable roundness. Specifically, when the gas pressure fluctuates, the sensor quickly captures the signal and transmits it to the drive motor 2222a. For example, changes in the gas supply during cable production cause pressure changes, which the sensor can detect in a very short time. The drive motor 2222a reacts according to the signal, achieving precise adjustment of the rotation of the flow stabilizing body 2221.

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

[0067] Specifically, both the pressure-reducing outlet 2112a and the exhaust inlet 2211 are located at the top of the quenching pipe body 100, with the pressure-reducing outlet 2112a located at one end of the axial direction and the exhaust inlet 2211 located in the middle of the axial direction. This layout facilitates the formation of a reasonable gas flow path. Most of the gas enters from the upper port and flows axially along the pipe cavity 110. During the cooling process of the wire core 120, it can cover the surface of the wire core 120 relatively evenly, improving cooling efficiency. At the same time, this arrangement makes the gas flow direction relatively concentrated in the pipe cavity 110, avoiding the formation of turbulence in the gas within the pipe cavity 110, reducing pressure fluctuations, and ensuring the stability of the cooling process.

[0068] Furthermore, a flow stabilizer 222 is used to reduce the gas jets at the center and bottom of the conductor 120. During gas flow, if there are strong gas jets at the center and bottom of the conductor 120, it will lead to uneven pressure distribution around the conductor 120. The pressure is lower at the gas jets, while the pressure is relatively higher in other areas. This pressure difference will subject the conductor 120 to uneven pressure, thus affecting the roundness of the cable. The flow stabilizer 222 can change the gas flow direction, reduce the gas velocity, and make the gas more evenly distributed around the conductor 120, reducing the pressure difference caused by the gas jets. This protects the conductor 120 from uneven compression during cooling, ensuring that the cable roundness meets production requirements.

[0069] The above settings ensure that the cooling gas comes into full and uniform contact with the core 120, achieving efficient cooling. On the other hand, they effectively avoid pressure problems caused by uneven gas flow, ensuring the roundness of the cable during the cooling process.

[0070] In some embodiments, the pressure-reducing outlet 2112a and the exhaust inlet 2211 are located on the same side of the axial direction of the core 120. The exhaust passage 221 of the exhaust unit 220 discharges the cooling gas, and the fact that the pressure-reducing outlet 2112a and the exhaust inlet 2211 are located on the same side forms a reasonable gas circulation path, reducing gas turbulence and pressure fluctuations.

[0071] By placing the pressure-reducing outlet 2112a and the exhaust inlet 2211 on the same side, a smoother gas circulation path can be created. Cooling gas enters the pipe cavity 110 from the pressure-reducing outlet 2112a, and after cooling the wire core 120, it can conveniently flow into the exhaust channel 221 from the exhaust inlet 2211 on the same side and be discharged. This same-side arrangement reduces the meandering flow of gas within the pipe cavity 110, making the gas flow direction more clear and concentrated, improving the efficiency of gas circulation, and ensuring that new cooling gas can continuously and efficiently enter the pipe cavity 110 to cool the wire core 120, maintaining a stable cooling effect. When gas flows within the pipe cavity 110, if the inlet and outlet positions are unreasonable, turbulence can easily form, leading to disordered gas flow. The design of the pressure-reducing outlet 2112a and the exhaust inlet 2211 being on the same side effectively avoids this situation. The same-side arrangement makes the gas flow more orderly, reduces mutual collisions and interference between gases, and lowers the possibility of turbulence. A stable gas flow state helps improve the uniformity of cooling and avoids uneven cooling of the core 120 due to turbulence, which could affect cable quality. Furthermore, gas turbulence can cause pressure fluctuations, adversely affecting the cable core 120, causing uneven compression and thus impacting the cable's roundness. By reducing gas turbulence, this design effectively reduces pressure fluctuations. A stable pressure environment is crucial for cable production, ensuring that the core 120 is subjected to uniform pressure during cooling.

[0072] See Figure 1 In some embodiments, the power cable cooling system further includes a temperature sensor 400 disposed in the pipe cavity 110, the temperature sensor 400 being used to monitor the temperature signal in the pipe cavity 110 in real time; the temperature sensor 400 is communicatively connected to a gas source, and the gas source adjusts the gas supply speed according to the temperature signal of the temperature sensor 400.

[0073] With the above settings, when the temperature sensor 400 detects that the temperature inside the pipe cavity 110 is too high, it means that the cable material may be excessively softened, affecting the shape and size of the cable. At this time, the air source will increase the air supply speed, increasing the supply of cooling gas, thereby accelerating heat removal and lowering the temperature. Conversely, if the temperature is too low, the cable material may shrink excessively, and the air source will reduce the air supply speed, decreasing the amount of cooling gas to prevent the temperature from dropping too low. Through this real-time adjustment mechanism, the temperature inside the pipe cavity 110 can be maintained within a suitable range. The coordinated operation of the temperature sensor 400 and the air source prevents the cable material from excessively softening at high temperatures or excessively shrinking at low temperatures. Under suitable temperature conditions, the cable material can maintain good physical properties, and its shape and size remain stable.

[0074] See Figure 1In some embodiments, the power cable cooling system further includes an exhaust gas collection mechanism 300, which is connected to the exhaust 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 a clean and safe production environment. Specifically, the exhaust gas collection mechanism 300 includes a collector 320 and a collection pipe 310, with the collector 320 connected to the exhaust outlet 2212 of the exhaust unit 220 via the collection pipe 310.

[0075] With the above configuration, the exhaust gas collection mechanism 300 is connected to the exhaust unit 220 to collect the discharged cooling gases, thus forming a complete closed loop in the gas circulation process of the entire quenching system. This ensures that the cooling gases are not directly discharged into the production environment, maintains the orderliness of gas flow within the system, and guarantees the stable operation of the quenching system.

[0076] In terms of environmental protection, the waste gas collection system 300 plays a crucial role in treating waste gases generated during the production process. During cable production, cooling gases, upon contact with the conductor 120, may carry heat and impurities. Direct emission of these gases would pollute the production environment, affecting workshop air quality and potentially corroding production equipment. The waste gas collection system 300, through its filtration device, effectively removes dust, debris, and other impurities from the waste gases. Even a small leak of the purified gas will not have a significant impact on the environment, maintaining a clean production workshop, providing a healthy working environment for operators, and extending equipment lifespan. From a safety perspective, some cooling gases may be flammable, explosive, or toxic. For example, in the production of certain specialized cables, cooling gases may contain volatile organic compounds. The waste gas collection system 300 collects these gases centrally, preventing their accumulation in the production workshop and the formation of safety hazards. Through filtration and treatment, the risk of fires, explosions, and personnel poisoning is reduced, ensuring the safe operation of production activities.

[0077] See Figure 1 In some embodiments, a power cable chilling system is installed between the head unit 500 and the eccentricity gauge 600. The conductor 120 passes sequentially through the head unit 500, the power cable chilling system, the eccentricity gauge 600, and the vulcanizing tube 700, effectively controlling the roundness of the conductor 120. The eccentricity gauge is used to calibrate the eccentricity. The vulcanizing tube 700 is a sealed space used for vulcanizing the conductor 120. During vulcanization, the conductor 120 undergoes a series of chemical reactions, altering its surface and internal structure, enhancing its heat resistance, insulation, and mechanical properties. Specifically, a gas inlet 710 is provided at the bottom of the vulcanizing tube 700, and a gas source is connected to the gas inlet 710. Gas is supplied to the pressure reducing channel 211 sequentially through the gas inlet 710, the vulcanizing tube 700, and the eccentricity gauge 600.

[0078] With the above setup, after the wire core 120 is extruded at the die head 500, its temperature is still high and its shape is not yet fully stable. Directly entering subsequent processes may result in poor roundness due to temperature and stress issues. The quenching system can rapidly cool the wire core 120, allowing it to reach a suitable temperature and stabilize its shape in a short time. By precisely controlling parameters such as cooling gas pressure and flow rate, uniform pressure is ensured around the wire core 120, effectively avoiding deformation caused by uneven pressure, thereby controlling its roundness and providing a stable quality wire core 120 for subsequent processes.

[0079] The lateral deviation meter 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 performs calibration. After being cooled by the quench system, the wire core 120 enters the lateral deviation meter 600. At this point, the shape of the wire core 120 has been initially stabilized, making it easier to adjust its position and calibrate its eccentricity. The deviation measuring instrument sends a signal based on the actual condition of the wire core 120, and the lateral deviation meter 600 uses this signal to fine-tune its position, further improving the roundness and quality of the wire core 120.

[0080] During the vulcanization process, a chemical reaction occurs on the surface and internal structure of the core 120, thereby enhancing its heat resistance, insulation, and mechanical properties. After being cooled and preliminarily shaped by the quenching system, the core 120 enters the vulcanizing tube 700, which better adapts to temperature and pressure changes during vulcanization, ensuring a uniform vulcanization reaction and improving the vulcanization effect. Simultaneously, a gas inlet 710 is located at the bottom of the vulcanizing tube 700. Gas is supplied to the pressure-reducing channel 211 of the quenching system through the gas inlet 710, the vulcanizing tube 700, and the deflector 600, forming a complete gas supply cycle. This ensures a stable source of cooling gas for the quenching system, maintaining its normal operation.

[0081] The operating principle of the power cable quenching system in some embodiments of this application is as follows:

[0082] First, guided by the set process parameters, the power cable production line starts up. The conductor is introduced into the die head 500 body, and PP material is extruded from the three-layer co-extrusion die head 500. After precise extrusion, it gradually forms the wire core 120. 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. Specifically, 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 controls the flow and direction of the wire core 120. A precision flow guiding device is installed inside the quench pipe body 100 to ensure the stable passage of the wire core 120.

[0084] Nitrogen gas enters the vulcanizing pipe 700 through the gas inlet 710 and then enters the pipe cavity 110 through the pressure reducing channel 211. This nitrogen gas is first slowed down by the pressure reducing channel 211, monitored by the pressure sensor 212, and then its flow rate and direction are appropriately adjusted as it flows through the flow stabilizer 222, thereby maintaining the pressure balance inside the pipe cavity 110. This balanced pressure environment is crucial for protecting the fragile core 120, preventing damage or deformation of the core 120 during production.

[0085] Nitrogen gas from the cooled core 120 is discharged through exhaust channel 221 and then enters the exhaust gas collection mechanism 300. After completing this series of steps, the core 120 is treated by the power cable quenching system to rapidly reduce its temperature. The cooled core 120 then enters the eccentricity meter for calibration and passes through the vulcanizing tube 700. After vulcanization, the core 120 completes the entire production process and is ready for the next stage of application or further processing. After production is completed, a section of core 120 is cut, stripped, and inspected to determine if its roundness meets the preset requirements.

[0086] The power cable quenching system provided in this application adopts multiple measures, including precise control of cooling gas pressure and flow rate, and optimization of gas flow path and discharge method, to ensure uniform pressure within the quenching pipe cavity 110. This effectively prevents the wire core 120 from being unevenly squeezed due to pressure differences, thus ensuring the cable's roundness. Simultaneously, it features high cooling efficiency, long service life, easy cleaning of accumulated dust, and low equipment maintenance rate.

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

[0088] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A quenching system for power cables, characterized in that The utility model relates to a power cable quenching system, comprising: a quenching pipeline body, a pipeline cavity is arranged in the quenching pipeline body, and the pipeline cavity is used for passing through a wire core; a cooling gas circulation mechanism, the cooling gas circulation mechanism comprises an air inlet unit and an air outlet unit arranged on the quenching pipeline body, the air inlet unit and the air outlet unit are communicated with the pipeline cavity respectively, and the air inlet unit and the air outlet unit are used for injecting and discharging cooling gas into the pipeline cavity; the air inlet unit comprises a pressure reduction channel arranged on the quenching pipeline 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 the cooling gas is subjected to pressure reduction through the pressure reduction channel, and the gas pressure at the pressure reduction outlet is less than the gas pressure at the pressure reduction inlet.

2. The quenching system for power cables according to claim 1, characterized in that, The pressure reduction channel comprises 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 position.

3. The quenching system for power cables according to claim 1, characterized in that, The air inlet unit further comprises a pressure sensor arranged at the pressure reduction outlet, and the pressure sensor is used for monitoring a gas pressure signal at the pressure reduction outlet in real time; The pressure sensor is connected with the gas source in communication, and the gas source adjusts the gas flow rate according to the gas pressure signal of the pressure sensor.

4. The quench system for power cables according to claim 3, characterized in that The air outlet unit comprises an exhaust channel arranged on the quenching pipeline body, the exhaust channel is provided with an exhaust inlet and an exhaust outlet, the exhaust inlet is communicated with the pipeline cavity, the exhaust outlet is communicated with the outside of the quenching pipeline body, and the cooling gas is sequentially discharged through the exhaust inlet and the exhaust outlet.

5. A quench system for a power cable according to claim 4, characterized in that The air outlet unit comprises a flow stabilizing plate arranged at the exhaust inlet, and the flow stabilizing plate is provided with a flow stabilizing through hole through which the cooling gas passes.

6. A quench system for a 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 through hole is arranged on the flow stabilizing body, the flow stabilizing body is fixedly connected with the rotating shaft, and the rotating shaft is rotatably connected with the quenching pipeline body.

7. A quench system for a power cable according to claim 6, characterized in that The rotating shaft is connected with a driving motor, and the driving motor drives the rotating shaft to rotate; The driving motor is connected with the pressure sensor in communication, 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 cables according to claim 4, characterized in that, The pressure reduction outlet and the exhaust inlet are arranged on the same side of the axial direction of the wire core.

9. The quenching system for power cables according to claim 1, characterized in that, The power cable quenching system further comprises a temperature sensor arranged in the pipeline cavity, and the temperature sensor is used for monitoring a temperature signal in the pipeline cavity in real time; The temperature sensor is connected with the gas source in communication, and the gas source adjusts the gas flow rate according to the temperature signal of the temperature sensor.

10. The quenching system for power cables according to claim 1, characterized in that, The power cable quenching system further comprises a waste gas collecting mechanism connected with the air outlet unit and used for collecting the discharged cooling gas.

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