Cross-linking heating device for large-section compressed circular conductor
By installing a drying channel and insulation layer in front of the conductor preheater, the problem of uneven heating of a circular conductor with large cross-section pressing in a circular conductor under low temperature environment is solved, and rapid uniform heating and high-quality insulating layer cross-linking are achieved, reducing the power consumption of the preheater.
Patent Information
- Application Number
- CN202422517503.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-17
- Publication Date
- 2025-08-15
- Estimated Expiration
- 2034-10-17
AI Technical Summary
It is difficult for large-section tight round conductors to quickly reach the process temperature in low temperature environments, resulting in large temperature differences between the inner and outer layers, affecting the crosslinking quality of the insulating layer, and the power of existing preheating devices is unstable, affecting product quality.
Install drying ducts before the conductor enters the preheater, including drying ducts, air inlets, fan units, temperature measurement couples and air guide plates. The hot air and insulation layer are used to increase the temperature of the conductor to ensure uniform heating, and adjust the air volume through the temperature measurement couple, and combine the insulation shell to improve the insulation effect.
It realizes rapid and uniform heating of the conductor in a low-temperature environment, reduces the temperature difference between the inner and outer layers, ensures the cross-linking quality of the insulating layer, reduces the power demand of the preheater, and avoids moisture entering and affects product quality.
Smart Images
Figure CN223230158U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of conductor preheating, and in particular relates to a cross-linking heating device for large-section compacted circular conductors. Background Art
[0002] The insulation layer of submarine cables with voltage levels of 220kV and above is relatively thick (≥20mm). During the insulation production process, a conductor preheater must be used to heat the conductor to a specified temperature so that the inside and outside of the insulation layer are heated simultaneously for synchronous cross-linking, so as to achieve a consistent degree of cross-linking inside and outside the insulation layer.
[0003] Since the heating principle of the conductor preheater is that the conductor generates induced current for heating when passing through the induction coil, when producing large-section compact circular conductors, the induced current will be concentrated on the surface of the conductor due to the skin effect, and the inside of the conductor can only absorb heat through heat conduction; when the ambient temperature is low, the large-section compact circular conductor cannot reach a thermal equilibrium state in a short time after passing through the conductor preheater, and there may be a phenomenon of hot outside and cold inside before entering the machine head, resulting in the actual temperature not meeting the process requirements; the existing conductor preheating device also has the problem of power instability when the power is too high, which can easily cause fluctuations in the actual heating temperature, affecting product quality. Utility Model Content
[0004] The purpose of the utility model is to provide a cross-linking and heating device for large-section compacted circular conductors, so as to solve the problems raised in the above-mentioned background technology.
[0005] To achieve the above objectives, the present invention provides the following technical solutions:
[0006] A cross-linking and heating device for large-section compacted circular conductors, comprising:
[0007] A drying tunnel, an air inlet, a fan unit, a temperature measuring couple, and an air guide plate. The air inlet is provided on one side of the drying tunnel, and the fan unit is provided on one side of the air inlet for blowing out hot air to heat the drying tunnel. The temperature measuring couple is installed inside the drying tunnel. The air guide plates are provided at both ends of the drying tunnel to reduce the escape flow of hot air at both ends of the drying tunnel, improve the heat preservation effect, and reduce the entry of dust into the drying tunnel.
[0008] The outer end of the drying tunnel is provided with an insulation layer to prevent the heating efficiency from being reduced in cold weather. The insulation layer is formed by splicing multiple groups of insulation shells, which can be assembled in combination. The corresponding number of insulation shells is selected for assembly according to the length of the drying tunnel.
[0009] Preferably, the temperature measuring couples are provided in at least three groups, which are respectively located at the front end, the rear end and the middle of the drying tunnel, for detecting the air temperature in the drying tunnel.
[0010] Preferably, the fan group includes a heater, a blower and a controller. The controller is electrically connected to the heater and the blower respectively, and is used to control the operation of the heater and the blower respectively. The blower is used to blow the heat generated by the heater into the inside of the drying tunnel to play a heating role, ensuring that the working temperature is reached quickly. After reaching the temperature, the temperature rise is stopped, and the air volume is adjusted according to the feedback value of the temperature measuring couple.
[0011] Preferably, a rubber pad is provided on the outer side of the air guide plate to prevent the outer non-metallic tape of the conductor from being scratched when the conductor shakes.
[0012] Preferably, one end of the insulation shell is connected to a connecting block, and a threaded end is provided on the outer side of the connecting block. The other end of the insulation shell is provided with a connecting slot that cooperates with the connecting block, that is, the connecting block is threadedly connected to the connecting slot. By installing the connecting blocks of one group of insulation shells inside the connecting slots of another group of insulation shells, the two adjacent groups of insulation shells can be spliced and assembled, which is convenient for installation or disassembly.
[0013] Preferably, an open groove is provided on the outer side of the thermal insulation shell for installing thermal insulation cotton, and thermal insulation cotton is provided inside the open groove, and an installation pressure block is also provided inside the open groove, and the installation pressure block is located on the outer side of the end of the thermal insulation cotton, which plays a role of pressing the end of the thermal insulation cotton, which is conducive to the installation of the thermal insulation cotton, and the side of the installation pressure block close to the thermal insulation cotton is provided with an anti-slip layer, and the inner wall of the open groove is also provided with an anti-slip layer, which plays an anti-slip role and is conducive to the firm installation of the thermal insulation cotton, and the internal rotation connection of the installation pressure block is limited. The insulation shell is threadedly connected to a threaded rod on one side close to the open groove, one end of the threaded rod extends to the interior of the installation pressure block and is connected to the limit block, and the other end of the threaded rod is connected to a rotating block.
[0014] Compared with the prior art, the beneficial effects of the present invention are:
[0015] The utility model increases the overall temperature of large-section conductors when the ambient temperature is low, reduces the temperature difference between the inner and outer layers after passing through the preheater, and enables the large-section conductors to reach the specified process temperature, providing sufficient heat for the inner insulation layer, ensuring the cross-linking quality of the insulation layer. The increase in the overall temperature of the conductor reduces the amount of heat required to reach the process temperature after passing through the preheater, reduces the power of the preheater, and ensures the cross-linking quality of the insulation layer. At the same time, when the air humidity is high, the water-blocking material of the inner layer of the water-blocking conductor for submarine cables can be dried to prevent moisture from entering the insulation layer and causing adverse effects, thereby preventing product quality from being affected. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0017] Figure 2 This is a schematic diagram of the connection of the thermal insulation shell of the present invention;
[0018] Figure 3 This is a schematic diagram of the internal structure of the thermal insulation shell of the present invention;
[0019] Figure 4 For the utility model Figure 2 A is an enlarged schematic diagram;
[0020] Figure 5 It is an enlarged schematic diagram of the heat-insulating shell of the present utility model;
[0021] In the figure: 1. Drying tunnel; 2. Insulation layer; 3. Fan unit; 4. Air guide plate; 5. Rubber cushion; 6. Temperature measuring couple;
[0022] 21. Insulation shell; 22. Insulation cotton; 23. Mounting block; 24. Threaded rod; 25. Limit block; 26. Rotating block; 27. Connecting block. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0024] Example:
[0025] See also Figure 1-Figure 5 As shown, a cross-linking and heating device for large-section compacted circular conductors comprises:
[0026] Drying tunnel 1, air inlet, fan unit 3, temperature measuring couple 6 and air guide plate 4. The air inlet is provided on one side of the drying tunnel 1. The fan unit 3 is provided on one side of the air inlet for blowing out hot air to heat the drying tunnel 1. The temperature measuring couple 6 is installed inside the drying tunnel 1. Air guide plates 4 are provided at both ends of the drying tunnel 1 to reduce the escape flow of hot air at both ends of the drying tunnel 1, improve the thermal insulation effect, and reduce the entry of dust into the drying tunnel 1.
[0027] An insulation layer 2 is provided at the outer end of the drying tunnel 1 to prevent the heating efficiency from being reduced in cold weather. The insulation layer 2 is composed of multiple groups of insulation shells 21, which can be assembled in combination. The corresponding number of insulation shells 21 is selected for assembly according to the length of the drying tunnel 1.
[0028] refer to Figure 1As shown, at least three groups of temperature measuring couples 6 are provided, which are located at the front end, the rear end and the middle of the drying tunnel 1 respectively, for detecting the air temperature in the drying tunnel 1 .
[0029] refer to Figure 1 As shown, the fan group 3 includes a heater, a blower and a controller. The controller is electrically connected to the heater and the blower respectively, and is used to control the operation of the heater and the blower respectively. The blower is used to blow the heat generated by the heater into the inside of the drying tunnel 1 to play a heating role, ensuring that the working temperature is reached quickly. After reaching the temperature, the temperature rise is stopped and the air volume is adjusted according to the feedback value of the temperature measuring couple 6.
[0030] refer to Figure 1 As shown, a rubber pad 5 is provided on the outer side of the air guide plate 4 to prevent the outer non-metallic tape of the conductor from being scratched when the conductor shakes.
[0031] refer to Figure 2-Figure 4 As shown, one end of the insulation shell 21 is connected to a connecting block 27, and a threaded end is provided on the outer side of the connecting block 27. The other end of the insulation shell 21 is provided with a connecting slot that matches the connecting block 27, that is, the connecting block 27 is threadedly connected to the connecting slot. By installing the connecting blocks 27 of one group of insulation shells 21 inside the connecting slots of another group of insulation shells 21, the two adjacent groups of insulation shells 21 can be spliced and assembled, which is convenient for installation or disassembly.
[0032] refer to Figure 2-Figure 4 As shown, an open groove is provided on the outside of the thermal insulation shell 21 for installing thermal insulation cotton 22, and thermal insulation cotton 22 is arranged inside the open groove. A mounting pressure block 23 is also provided inside the open groove. The mounting pressure block 23 is located on the outside of the end of the thermal insulation cotton 22, and plays a role in pressing the end of the thermal insulation cotton 22, which is beneficial to the installation of the thermal insulation cotton 22. An anti-slip layer is provided on the side of the mounting pressure block 23 close to the thermal insulation cotton 22, and an anti-slip layer is also provided on the inner wall of the open groove, which plays an anti-slip role and is beneficial to the firm installation of the thermal insulation cotton 22. The internal rotation connection of the mounting pressure block 23 is limited to a limit block 25, and a threaded rod 24 is threadedly connected to one side of the thermal insulation shell 21 close to the open groove. One end of the threaded rod 24 extends to The interior of the installation pressing block 23 is connected to the limit block 25, and the other end of the threaded rod 24 is connected to a rotating block 26. When replacing the thermal insulation cotton 22 after long-term use, the rotating blocks 26 are first rotated forward to rotate the threaded rod 24, thereby driving the installation pressing block 23 to move up and away from the thermal insulation cotton 22, releasing the limiting and fixing effect on the end of the thermal insulation cotton 22, and then removing the thermal insulation cotton 22, and then installing the new thermal insulation cotton 22. After installation, the rotating block 26 is rotated in the opposite direction to move the installation pressing block 23 downward and press the end of the thermal insulation cotton 22, thereby fixing the thermal insulation cotton 22, which is conducive to completing the replacement of the thermal insulation cotton 22 and is simple to operate.
[0033] Place the device in front of the conductor preheater. When the ambient temperature is low (≤5°C), turn on the heating fan to allow hot air to enter and exit the drying tunnel through the air inlet. Adjust the heating fan power according to the production line speed and conductor specifications. Monitor the temperature in the drying tunnel using thermocouples to raise the overall temperature of large-section compacted circular conductors passing through the drying tunnel to 40-60°C.
[0034] The utility model increases the overall temperature of large-section conductors when the ambient temperature is low, reduces the temperature difference between the inner and outer layers after passing through the preheater, and enables the large-section conductors to reach the specified process temperature, providing sufficient heat for the inner insulation layer, ensuring the cross-linking quality of the insulation layer. The increase in the overall temperature of the conductor reduces the amount of heat required to reach the process temperature after passing through the preheater, reduces the power of the preheater, and ensures the cross-linking quality of the insulation layer. At the same time, when the air humidity is high, the water-blocking material of the inner layer of the water-blocking conductor for submarine cables can be dried to prevent moisture from entering the insulation layer and causing adverse effects, thereby preventing product quality from being affected.
[0035] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A cross-linking and heating device for large-section compressed circular conductors, characterized in that: include: A drying tunnel (1), an air inlet, a fan unit (3), a temperature measuring thermocouple (6) and an air guide plate (4); the air inlet is provided on one side of the drying tunnel (1); the fan unit (3) is provided on one side of the air inlet; the temperature measuring thermocouple (6) is installed inside the drying tunnel (1); and the air guide plates (4) are provided at both ends of the drying tunnel (1); The outer end of the drying tunnel (1) is provided with a heat-insulating layer (2), and the heat-insulating layer (2) is formed by splicing together a plurality of heat-insulating shells (21).
2. A cross-linking and heating device for large-section compressed circular conductors according to claim 1, characterized in that: The temperature measuring couples (6) are arranged in at least three groups.
3. The cross-linking and heating device for large-section compressed circular conductors according to claim 2, characterized in that: The fan unit (3) comprises a heater, a blower and a controller, and the controller is electrically connected to the heater and the blower respectively.
4. The cross-linking and heating device for large-section compressed circular conductors according to claim 3, characterized in that: A rubber cushion layer (5) is provided on the outer side of the air guide plate (4).
5. The cross-linking and heating device for large-section compressed circular conductors according to claim 1, characterized in that: One end of the heat-insulating shell (21) is connected to a connecting block (27), the outer side of the connecting block (27) is provided with a threaded end, and the other end of the heat-insulating shell (21) is provided with a connecting slot matched with the connecting block (27).
6. The cross-linking and heating device for large-section compressed circular conductors according to claim 5, characterized in that: An open groove is provided on the outside of the heat-insulating shell (21), and heat-insulating cotton (22) is provided inside the open groove. A mounting block (23) is also provided inside the open groove. The mounting block (23) is located outside the end of the heat-insulating cotton (22). A non-slip layer is provided on the side of the mounting block (23) close to the heat-insulating cotton (22). The inner wall of the open groove is also provided with an non-slip layer. The internal rotation connection of the mounting block (23) is provided with a limit block (25). The side of the heat-insulating shell (21) close to the open groove is threadedly connected to a threaded rod (24). One end of the threaded rod (24) extends to the inside of the mounting block (23) and is connected to the limit block (25). The other end of the threaded rod (24) is connected to a rotating block (26).