Degassing device
By using high-strength steel cylinders and side plates in the cable manufacturing process, and by incorporating through holes and hot air convection, the problems of long degassing time and insufficient degassing in existing technologies have been solved, achieving efficient and thorough degassing and ensuring the quality and mechanical strength of cable products.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2026-03-05
- Publication Date
- 2026-04-14
AI Technical Summary
In existing cable manufacturing processes, degassing devices with excessively long degassing times for insulated cores, designed to ensure degassing quality, often result in insufficient removal of byproduct gases, impacting production efficiency. Furthermore, these devices heat the inner and intermediate layers of long insulated cores slowly, leading to poor heat dissipation and inadequate removal of cross-linking byproducts. Current technologies address this by increasing degassing time or temperature, but this reduces the mechanical strength of the insulated core and causes deformation.
Design a degassing device including a cylinder and a side plate. The cylinder has multiple through holes, and the side plate also has through holes. The cylinder and side plate are made of high-strength steel. By setting through holes in the cylinder and side plate, gas is facilitated to be discharged, and the convection of hot and cold air is used to accelerate the degassing process and shorten the degassing time.
It improves degassing efficiency and quality, ensures the mechanical strength of the insulated core, shortens the degassing time, avoids deformation of the insulated core due to excessive time or high temperature, and enhances the performance of cable products.
Smart Images
Figure CN224116557U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of power cable technology, and more particularly to a degassing device. Background Technology
[0002] During cable manufacturing, the cross-linking reaction between the insulation material and the conductor (forming the insulated conductor) produces byproducts such as methane, affecting cable quality. Therefore, it is necessary to degas the insulated conductor before it enters the next process to remove these byproducts. Typically, the degassing device containing the insulated conductor is placed in a drying oven for several days or even tens of days to eliminate the byproducts generated by the cross-linking reaction. However, with my country's economic development, electricity demand has increased, and voltage levels have risen, leading to a gradual increase in the insulation thickness and length of the insulated conductor.
[0003] Currently, the cable industry primarily ensures degassing effectiveness by increasing degassing time or raising oven temperature. However, for thicker insulated cores, excessively long degassing times can negatively impact production efficiency. For long-length insulated cores, the inner and middle layers heat up slowly and dissipate heat poorly, resulting in insufficient elimination of cross-linking byproducts. Excessively high degassing temperatures can also lead to a decrease in the mechanical strength of the insulated core, causing deformation. Utility Model Content
[0004] In view of this, this application proposes a degassing device to shorten the degassing time and improve the degassing efficiency while ensuring the degassing quality.
[0005] One embodiment of this application provides a degassing device for degassing insulated wire cores. The degassing device includes a cylindrical body and side plates, the cylindrical body having a plurality of first through holes. The side plates are connected to both ends of the cylindrical body in its extending direction, and the side plates have a plurality of second through holes.
[0006] In one embodiment, the outer edge of the side plate is provided with an outer frame for reinforcing structural strength.
[0007] In one embodiment, the cylinder, the side plate, and the outer frame are all made of high-strength steel, and the grade of the high-strength steel is Q345B, Q460, or Q690D.
[0008] In one embodiment, the side plate has an opening at its center, and a reinforcing rib is provided inside the opening.
[0009] In one embodiment, the reinforcing rib includes a plurality of intersecting support plates, each of which is connected at both ends to the inner wall of the opening.
[0010] In one embodiment, the cylinder is cylindrical in shape. The side plate is also cylindrical, and its diameter is larger than that of the cylinder.
[0011] In one embodiment, the axial direction of the cylinder is parallel to the axial direction of the side plate.
[0012] In one embodiment, the outer diameter of the cylinder is 25 to 50 times the outer diameter of the insulated wire core.
[0013] In one embodiment, the first through hole is a circular hole. The diameter of the first through hole is 8cm to 15cm, and the distance between two adjacent first through holes is 3cm to 8cm.
[0014] In one embodiment, the second through hole is a circular hole. The diameter of the second through hole is 8cm to 15cm, and the distance between two adjacent second through holes is 3cm to 8cm.
[0015] The degassing device of this application improves degassing efficiency by providing a first through hole and a second through hole on the cylinder and side plate, respectively. This allows by-product gases to be directly discharged through the first and second through holes. Furthermore, the first and second through holes facilitate convection between hot and cold air, enabling the internal by-product gases to diffuse continuously outward at a high rate. This degassing efficiency is far higher than simple diffusion, and it also ensures more thorough and complete elimination of by-product gases, completely eliminating cross-linking by-products, improving degassing quality, and guaranteeing the performance of the subsequently formed cable products. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the degassing device according to one embodiment of this application.
[0017] Explanation of main component symbols
[0018] 100: Degassing device; 10: Cylinder body; 20: Side plate; 30: Outer frame; 11: First through hole; 21: Second through hole; 22: Opening; 23: Reinforcing rib; 24: Support plate.
[0019] The following detailed description, in conjunction with the accompanying drawings, further illustrates the embodiments of this application. Detailed Implementation
[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiments of this application pertain. The terminology used herein is for the purpose of describing particular implementations only and is not intended to limit the embodiments of this application. Where specific conditions are not specified in the embodiments, conventional conditions or conditions recommended by the manufacturer shall apply. Reagents or components whose manufacturers are not specified are all conventional products that can be purchased commercially.
[0021] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0022] When a component is referred to as being "fixed to," "installed on," "set on," or "connected to" another component, it can be directly on the other component or it can be located in an intermediate component. Furthermore, descriptions using terms such as "first," "second," etc., in this application are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features.
[0023] It is understood that when describing the parallel / perpendicular setup of two components, the included angle between the two components is allowed to have a tolerance of ±10% relative to the standard parallel / perpendicular setup.
[0024] Degassing is a crucial process in cable manufacturing, primarily used in the production of medium-voltage, high-voltage, and ultra-high-voltage cross-linked polyethylene (XLPE) insulated power cables. In the cross-linking process, the conductor is not extruded with ordinary plastic (such as PVC / PE), but with polyethylene containing a cross-linking agent. Under high temperature and pressure, the cross-linking agent decomposes, transforming the linear molecular structure of polyethylene into a three-dimensional network (i.e., cross-linking), resulting in insulated cores (conductor + insulation layer). During the cross-linking reaction, the cross-linking agent decomposes to produce low-molecular-weight byproducts, mainly gases such as methane and acetophenone. These gases remain inside the insulation layer. If these gases are not removed, they form micropores within the insulation. Under high electric fields, these micropores experience partial discharge (corona discharge), which, over time, gradually erodes the insulation material, eventually leading to cable insulation breakdown and a drastically shortened lifespan. After degassing, one or more insulated cores undergo a series of processes including cabling, shielding, armoring, and sheathing to produce the final product, the cable. Existing degassing devices rely primarily on slow concentration diffusion (the spontaneous movement of molecules from high-concentration areas to low-concentration areas) for gas migration. This process is extremely slow, resulting in degassing times of several days or even weeks, and inadequate elimination of byproducts.
[0025] Therefore, this application proposes a degassing device to shorten the degassing time and improve the degassing efficiency while ensuring the degassing quality.
[0026] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.
[0027] Please see Figure 1 This application provides a degassing device 100 for degassing insulated wire cores (not shown). The degassing device 100 includes a cylindrical body 10 and side plates 20 connected to the cylindrical body 10. In this embodiment, the two side plates 20 are arranged opposite to each other and are respectively connected to both ends of the cylindrical body 10 in the extending direction. The cylindrical body 10 may be a hollow structure, and the cylindrical body 10 is provided with a plurality of first through holes 11, which can penetrate the entire side wall along the thickness direction of the side wall of the cylindrical body 10. Each side plate 20 is provided with a plurality of second through holes 21, which can penetrate the entire side plate 20 along the thickness direction of the side plate 20.
[0028] When degassing is required, the insulated wire core is wound around the cylinder 10. The side plates 20 at both ends of the cylinder 10 can fix and limit the insulated wire core. After the insulated wire core is loaded, the degassing device 100 and the insulated wire core are moved to a drying oven with a certain temperature and left to stand, so that the gas remaining inside the insulation layer can diffuse and be released more quickly. Since the cylinder 10 has multiple first through holes 11 and the side plates 20 have multiple second through holes 21, the by-product gas can enter the first through hole 11 on the cylinder 10 or the second through hole 21 on the side plate 20 nearby and be discharged directly. The first through holes 11 and the second through holes 21 greatly shorten the average migration path of the by-product gas molecules, reduce the residence time of the by-product gas in the degassing device 100, and improve the degassing efficiency.
[0029] Furthermore, the degassing process takes place in a drying chamber, where the degassing device 100 and the insulated wire core are uniformly heated. According to thermodynamic principles, hot air with a lower density rises. The air and byproduct gases inside the degassing device 100 are heated, becoming a hot airflow. This hot airflow escapes through the first through-hole 11 and the second through-hole 21 located at the top and middle, respectively. Cooler, fresher air is drawn in from the bottom of the degassing device 100, creating continuous convection. This natural convection, driven by temperature difference, continuously draws out the high-concentration byproduct gases and replenishes them with low-concentration fresh air, resulting in a degassing efficiency far exceeding that of simple diffusion. Moreover, the convection effect from the first through-hole 11 and the second through-hole 21 quickly blows away the high-concentration byproduct gases precipitated on the surface of the degassing device 100 and replaces them with low-concentration air. This maintains a high concentration difference environment on the surface of the insulated wire core, allowing the internal byproduct gases to continuously diffuse outward at a high rate, thus ensuring more thorough elimination of the byproduct gases.
[0030] In some embodiments, such as Figure 1As shown, the cylinder 10 is cylindrical, and the side plate 20 can also be cylindrical to facilitate the winding of the insulated wire core. The extension direction of the cylinder 10 is the axial direction of the cylinder, and the thickness direction of the side plate 20 is the axial direction of the cylinder. The axial direction of the cylinder 10 is parallel to the axial direction of the side plate 20, and the center of the side plate 20 can coincide with the center of the cylinder 10. Thus, the degassing device 100 has a symmetrical structure, which helps to maintain the stability of the degassing device 100 and the insulated wire core.
[0031] Furthermore, the diameter of the side plate 20 is larger than the diameter of the cylinder 10. Thus, after the insulating wire core is wound around the cylinder 10, there is still a certain gap between the outermost insulating wire core and the bottom of the degassing device 100, which helps the air to circulate, thereby helping to improve the degassing efficiency and degassing effect.
[0032] Furthermore, the outer diameter of the cylinder 10 can be 25 to 50 times the outer diameter of the insulated wire core. This ensures uniform heating of the insulated wire core and complete stress release. The outer diameter of the cylinder 10 can be 25, 30, 35, 40, or 50 times the outer diameter of the insulated wire core, or any value between any two adjacent values mentioned above.
[0033] In some embodiments, such as Figure 1 As shown, the first through holes 11 are evenly distributed on the cylinder 10, and the second through holes 21 are evenly distributed on the side plate 20. The even distribution means that each first through hole 11 (second through hole 21) has the same shape and size, and the spacing between any two adjacent first through holes 11 (second through holes 21) is the same, and the number of first through holes 11 (second through holes 21) per unit area of the cylinder 10 (side plate 20) remains consistent. The evenly distributed through holes prevent gas accumulation in localized areas (especially the central area) of the degassing device 100, achieving synchronous and uniform degassing and ensuring consistent degassing quality for all insulated wire cores.
[0034] In some embodiments, the first through hole 11 is a circular hole. The diameter of the first through hole 11 can be 8cm to 15cm, and the hole spacing between two adjacent first through holes 11 can be 3cm to 8cm. The diameter of the first through hole 11 can be 8cm, 9cm, 10cm, 13cm, 15cm, or any value between any two adjacent values mentioned above, and the hole spacing between two adjacent first through holes 11 can be 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, or any value between any two adjacent values mentioned above. This helps to fully eliminate the by-product gas of the innermost insulating core. The hole spacing refers to the distance between the centers of two adjacent first through holes 11. In other embodiments, the first through hole 11 can also be a square hole, a triangular hole, an oblong hole, or other regular or irregular shapes, and this application does not impose any limitations.
[0035] In some embodiments, such as Figure 1 As shown, the second through hole 21 is a circular hole. The diameter of the second through hole 21 can be 8cm to 15cm, and the distance between two adjacent second through holes 21 can be 3cm to 8cm. The diameter of the second through hole 21 can be 8cm, 9cm, 10cm, 13cm, 15cm, or any value between any two adjacent values mentioned above, and the distance between two adjacent second through holes 21 can be 3cm, 4cm, 5cm, 6cm, 7cm, 8cm, or any value between any two adjacent values mentioned above. This allows gas to flow and escape from each layer of insulation core from the outside to the inside, thereby improving the degassing efficiency and degassing effect. The hole distance refers to the distance between the centers of two adjacent second through holes 21. In other embodiments, the second through hole 21 can also be a square hole, a triangular hole, an oblong hole, or other regular or irregular shapes, and this application does not impose any limitations.
[0036] In some embodiments, such as Figure 1 As shown, an opening 22 is provided at the center of the side plate 20. The opening 22 can penetrate the entire side plate 20 along the thickness direction, and the opening 22 can be a circular hole with a diameter larger than that of the second through hole 21 (circular hole). A reinforcing rib 23 is provided inside the opening 22, and the reinforcing rib 23 is used to protect the load-bearing structure of the degassing device 100.
[0037] Furthermore, the reinforcing rib 23 may include a plurality of intersecting support plates 24, each support plate 24 having both ends connected to the inner wall of the opening 22. In this embodiment, as shown... Figure 1 As shown, there are two support plates 24, which can form a "cross" shape. In other embodiments, the number of support plates 24 can be adjusted according to actual needs, and this application does not impose any limitations.
[0038] In some embodiments, such as Figure 1 As shown, the outer edge of the side plate 20 is provided with an outer frame 30 to enhance the structural strength. The outer frame 30 can be provided around the outer edge of the side plate 20 to improve the strength of the side plate 20 and prevent the side plate 20 from deforming.
[0039] Furthermore, the cylinder 10 can be integrally welded to the side plate 20, and the side plate 20, outer frame 30 and reinforcing rib 23 can be integrally formed, which enhances the integrity and strength of the degassing device 100.
[0040] Furthermore, the cylinder 10, side plates 20, reinforcing ribs 23, and outer frame 30 can all be made of high-strength steel (yield strength ≥ 340 MPa) to ensure that the degassing device 100 has good load-bearing capacity and is not prone to bending deformation after being wound with long or thick insulating wire cores. The high-strength steel grades can be, but are not limited to, Q345B, Q460, or Q690D. These grades of high-strength steel have high strength, good weldability, sufficient toughness, and a relatively high cost-performance ratio.
[0041] The degassing device 100 provided in this embodiment improves degassing efficiency by providing a first through hole 11 and a second through hole 21 on the cylinder 10 and side plate 20, respectively. This allows by-product gases to be directly discharged through the first through hole 11 and the second through hole 21. Furthermore, the first through hole 11 and the second through hole 21 also allow for convection between hot and cold air, enabling the internal by-product gases to diffuse continuously outward at a high rate. This degassing efficiency is far higher than simple diffusion, and it also allows for more thorough and complete elimination of by-product gases, completely eliminating cross-linking by-products, improving degassing quality, and ensuring the performance of the subsequently formed cable products.
[0042] The above description describes some specific embodiments of this application, but in actual applications, the application should not be limited to these embodiments. For those skilled in the art, other modifications and alterations made based on the technical concept of this application should fall within the protection scope of this application.
Claims
1. A degassing device for degassing an insulated core, characterized in that The gas removal device comprises: a cylinder body provided with a plurality of first through holes; and a side plate connected to both ends of the extension direction of the cylinder body, the side plate being provided with a plurality of second through holes.
2. The gas removal device of claim 1, wherein An outer frame is arranged on the outer edge of the side plate to strengthen the structural strength.
3. The gas removal device of claim 2, wherein The cylinder body, the side plate and the outer frame are all made of high-strength steel, and the grade of the high-strength steel is Q345B, Q460 or Q690D.
4. The gas removal device of claim 1, wherein A reinforcing rib is arranged in the center of the side plate.
5. The gas removal device of claim 4, wherein The reinforcing rib comprises a plurality of intersecting support plates, and both ends of each support plate are connected to the inner wall of the opening.
6. The gas removal device of claim 1, wherein The cylinder body is in a cylindrical shape, the side plate is in a cylindrical shape, and the diameter of the side plate is greater than the diameter of the cylinder body.
7. The gas removal device of claim 6, wherein The axial direction of the cylinder body is parallel to the axial direction of the side plate.
8. The gas removal device of claim 6, wherein The outer diameter of the cylinder body is 25 to 50 times the outer diameter of the insulated wire core.
9. The gas removal device of claim 1, wherein The first through hole is a circular hole, the hole diameter of the first through hole is 8 to 15 cm, and the hole distance between adjacent two first through holes is 3 to 8 cm.
10. The gas removal device of claim 1, wherein The second through hole is a circular hole, the hole diameter of the second through hole is 8 to 15 cm, and the hole distance between adjacent two second through holes is 3 to 8 cm.