Device, system and method for monitoring the degassing effect of drying oven for medium and high voltage cross-linked insulated wire cores

Abstract

This invention discloses a device, system, and method for monitoring the degassing effect of a medium- and high-voltage cross-linked insulated wire core drying chamber. The device includes a cap, a one-way exhaust valve, and a cap fastening mechanism. One end of the cap is closed and has an exhaust port, with the one-way exhaust valve located inside the exhaust port. The other end of the cap is fitted onto the end of the medium- and high-voltage cross-linked insulated wire core and, in use, is sleeved onto the end of the core and sealed and fixed by the cap fastening mechanism. This invention eliminates safety hazards for workers, automatically collects and analyzes data, and is simple to operate with good real-time performance.

Description

Technical Field

[0001] This invention relates to a degassing effect monitoring device, system, and method, particularly a medium- and high-voltage cross-linked insulated wire core drying chamber degassing effect monitoring device, system, and method, belonging to the field of cable testing technology. Background Technology

[0002] Medium and high voltage cross-linked insulated wire cores use cross-linked polyethylene as the main insulation material. Cross-linked polyethylene is produced by cross-linking linear polyethylene molecules into a network three-dimensional structure. During the cross-linking process, cross-linking byproducts such as methane and cumyl alcohol are produced. These byproducts seep into the insulation and are difficult to remove. After the cross-linked insulated wire cores are produced, they need to be degassed in a degassing chamber at (70±5)℃. If degassing is insufficient, the cross-linking byproducts will have a significant impact on the electrical performance and long-term stable operation of the insulation. Currently, the most economical and practical method for testing the degassing effect of medium and high voltage cross-linked insulated wire cores is for technicians to fill a transparent container with a certain volume of test liquid, enter the degassing chamber, place the head or tail end of the cross-linked insulated wire core into the test liquid, and count the amount of gaseous byproducts released from the end of the cross-linked insulated wire core per unit time. The degassing effect is then judged based on experience. This monitoring method has the following drawbacks: (1) There are significant safety hazards and personal injury risks. On the one hand, after the cross-linked insulated wire core is produced, it needs to be degassed in a drying room at (70±5)℃. When technicians enter the degassed room to verify the degassed effect, they may suffer from heatstroke, fainting or suffocation due to the high temperature. On the other hand, the cross-linked insulated wire core will decompose and produce cross-linking byproducts such as methane and cumyl alcohol during the degassed process. These byproducts have certain toxicity and may cause harm to the technicians.

[0003] (2) It is not easy to operate and requires multiple people to complete. At present, the voltage level of high voltage cross-linked insulated wire cores is getting higher and higher, the conductor cross-section is getting larger and larger, and the diameter of cross-linked insulated wire cores is also getting larger and larger. When using a transparent container to fill a certain volume of test liquid to verify the degassing effect, it is not possible to ensure that the end of each reel of cross-linked insulated wire core is facing down when winding the wire. Multiple people are needed to complete the test, which is relatively laborious and time-consuming.

[0004] (3) The degassing effect cannot be monitored in real time. Each time the degassing effect of the cross-linked insulated wire core is monitored, technicians need to put a certain volume of test liquid into the degassing room in a transparent container. The operation is cumbersome and the degassing effect of the cross-linked insulated wire core cannot be monitored in real time.

[0005] (4) It is difficult to establish standardized operating procedures. If the ends of the cross-linked insulated wire cores are not treated evenly, there will be deviations in the depth of the cross-linked wire core ends inserted into the testing container during testing. This will result in inaccurate statistics on the amount of gaseous byproducts released by the cross-linked insulated wire cores, affecting the judgment of the degassing effect, and it will be difficult to establish standardized operating procedures. Summary of the Invention

[0006] The technical problem to be solved by the present invention is to provide a device, system and method for monitoring the degassing effect of a drying oven for medium and high voltage cross-linked insulated wire cores, thereby solving at least one defect of the prior art.

[0007] To solve the above-mentioned technical problems, the technical solution adopted by the present invention is as follows: A device for monitoring the degassing effect of a drying oven for medium and high voltage cross-linked insulated wire cores includes a cap, a one-way exhaust valve, and a cap fastening mechanism. One end of the cap is closed and has an exhaust port. The one-way exhaust valve is located inside the exhaust port. The other end of the cap is matched with the medium and high voltage cross-linked insulated wire core. In use, the cap is sleeved on the end of the medium and high voltage cross-linked insulated wire core and sealed and fixed by the cap fastening mechanism.

[0008] Furthermore, the cap body is a circular tube structure with one end closed, and the exhaust port is located on the closed end face of the cap body. The inner diameter of the cap body matches the outer diameter of the medium and high voltage cross-linked insulated wire core.

[0009] Furthermore, an inner lining layer is provided on the inner wall of the cap.

[0010] Furthermore, the cap fastening mechanism includes a retractable clamp, a bolt, a support shaft, and a handle. The retractable clamp is fitted onto the outside of the cap body. Both ends of the retractable clamp have through holes that match the bolt. The support shaft has a threaded hole. One end of the bolt passes through the through holes at both ends of the retractable clamp and is then screwed into the threaded hole of the support shaft. The handle is rotatably mounted on the support shaft.

[0011] Furthermore, the adjustable clamp has an overall C-shaped structure, and the inner diameter of the inner circle of the C-shaped structure matches the outer diameter of the cap. The two ends of the adjustable clamp are parallel to each other and extend in a direction away from the surface of the cap. Each end of the adjustable clamp has a through hole, and the two through holes are located on the same straight line.

[0012] Furthermore, the threaded hole is opened radially along the support shaft, and the outer edge of the end where the handle is rotatably connected to the support shaft is a cam structure. When the handle rotates along the support shaft towards the surface of the cap, the diameter of the cam structure gradually increases, thereby tightening both ends of the retractable clamp.

[0013] Furthermore, the other end of the bolt is provided with a disc-shaped screw head protruding from the side of the bolt, and the outer surface of the screw head is provided with friction texture.

[0014] A system for monitoring the degassing effect of a medium- and high-voltage cross-linked insulated wire core drying chamber includes a device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying chamber, a degassing chamber, an exhaust pipe, a container, an infrared gaseous byproduct counter, and a data acquisition and processing system. The device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying chamber is installed inside the degassing chamber at the end of the medium- and high-voltage cross-linked insulated wire core and is sealed and locked. One end of the exhaust pipe is connected to the exhaust port of the device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying chamber, and the other end of the exhaust pipe extends out of the degassing chamber and is connected to the side wall of the container. The infrared gaseous byproduct counter is installed on the inner wall of the container and is connected to the data acquisition and processing system to upload the collected gaseous byproduct information to the data acquisition and processing system for processing.

[0015] Furthermore, the container is a semi-open container, and the side wall of the container is provided with graduations.

[0016] A method for monitoring the degassing effect of a drying oven based on a medium- and high-voltage cross-linked insulated wire core degassing system includes the following steps: S1. Clean the impurities from the surface of the medium and high voltage cross-linked insulated wire core; S2. Install the degassing effect monitoring device of the medium and high voltage cross-linked insulated wire core drying room at the end of the medium and high voltage cross-linked insulated wire core, and lock and fix it through the cap fastening mechanism. S3. One end of the exhaust pipe is connected to the exhaust port of the medium and high voltage cross-linked insulated wire core drying oven degassing effect monitoring device, and the other end of the exhaust pipe leads the gaseous byproducts generated by the medium and high voltage cross-linked insulated wire core into the container. S4. Inject the test liquid into the container; S5. The infrared gaseous byproduct counter collects the quantity of gaseous byproducts per unit time and uploads it to the data acquisition and processing system. The data acquisition and processing system performs statistical analysis on the degassing effect. S6. When the data acquisition and processing system detects that the gaseous by-product release rate Q is less than or equal to the preset threshold, it determines that the degassing meets the standard and issues an alarm notification. Q=ΔP / ΔT, where ΔP is the amount of gaseous by-products released in the container and ΔT is the detection time.

[0017] Compared with the prior art, the present invention has the following advantages and effects: 1. With this invention, technicians do not need to enter the drying chamber when testing the degassing effect of the degassing chamber. They can monitor the degassing effect of the cross-linked insulated wire core in real time from outside the degassing chamber, eliminating the significant safety hazards and personal injury consequences that would otherwise occur if technicians entered the degassing chamber to test the degassing effect of the cross-linked insulated wire core.

[0018] 2. This invention is easy to install and does not require the assistance of multiple people; a single technician can operate it independently.

[0019] 3. The present invention uses a data acquisition and processing system to collect and process data, which can complete the real-time tracking and statistics of degassing effect.

[0020] 4. This invention positions the end of the cross-linked insulated wire core within a monitoring container. The monitoring container has a scale that can fix the depth of the end in the test liquid, eliminating the inaccurate counting of the amount of gaseous byproducts released by the cross-linked insulated wire core due to the different depths of the cross-linked insulated wire core into the test liquid each time, which affects the judgment of the degassing effect.

[0021] 5. This invention eliminates the deviation in the depth of the cross-linked wire core end inserted into the detection container during testing caused by uneven treatment of the cross-linked insulated wire core end, thus improving the accuracy of data statistics. In addition, this invention is easy to operate and can be implemented in a standardized operating procedure. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the device for monitoring the degassing effect of the medium and high voltage cross-linked insulated wire core drying oven according to the present invention.

[0023] Figure 2 This is a schematic diagram of the degassing effect monitoring system for the medium and high voltage cross-linked insulated wire core drying oven of the present invention. Detailed Implementation

[0024] To illustrate in detail the technical solutions adopted by the present invention to achieve the intended technical objectives, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Furthermore, the technical means or technical features in the embodiments of the present invention can be replaced without creative effort. The present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0025] like Figure 1 As shown, the present invention provides a device for monitoring the degassing effect of a medium- and high-voltage cross-linked insulated wire core drying oven, comprising a cap body 1, a one-way exhaust valve 2, and a cap body fastening mechanism. One end of the cap body 1 is closed and has an exhaust port, and the one-way exhaust valve 2 is disposed inside the exhaust port. The other end of the cap body 1 is matched with the medium- and high-voltage cross-linked insulated wire core. In use, it is sleeved on the end of the medium- and high-voltage cross-linked insulated wire core and sealed and fixed by the cap body fastening mechanism.

[0026] One-way exhaust valve 2 can prevent test liquid from flowing back into the medium and high voltage cross-linked insulated wire core due to operator error, which would cause inaccurate data on the degassing effect of the medium and high voltage cross-linked insulated wire core.

[0027] The cap body 1 is a circular tube structure closed at one end, with the vent located at the center of the closed end face. The inner diameter of the cap body 1 matches the outer diameter of the medium- and high-voltage cross-linked insulated wire core. In this embodiment, since an inner lining layer is also required on the inner wall of the cap body 1, the actual inner diameter of the cap body 1 is slightly larger than the outer diameter of the medium- and high-voltage cross-linked insulated wire core. The cap body 1 is formed by injection molding of thermoplastic materials such as PVC or PE using a specific mold, with a diameter 2-4 mm larger than the outer diameter of the medium- and high-voltage cross-linked insulated wire core and a thickness of 1 mm.

[0028] An inner lining layer 3 is provided on the inner wall of the cap body 1. The inner lining layer 3 is formed by injection molding of elastic thermoplastic material or rubber, with a thickness of 3-5mm. The inner lining layer 3 can prevent the cap body 1 from directly contacting the external insulation of the medium and high voltage cross-linked insulated wire core, thus avoiding damage to the external insulation of the wire core. Moreover, the inner lining layer 3 is made of soft sealing material, which can improve the sealing performance between the cap body 1 and the insulated wire core after sealing and tightening.

[0029] The cap fastening mechanism includes a retractable clamp 4, a bolt 5, a support shaft 6, and a handle 7. The retractable clamp 4 is fitted on the outside of the cap body 1. Both ends of the retractable clamp 4 have through holes that match the bolt 5. The support shaft 6 has a threaded hole. One end of the bolt 5 passes through the through holes at both ends of the retractable clamp 4 and is then screwed into the threaded hole of the support shaft 6. The handle 7 is rotatably mounted on the support shaft 6.

[0030] The adjustable clamp 4 has a C-shaped structure and the inner diameter of the inner ring of the C-shaped structure matches the outer diameter of the cap body 1. The two ends of the adjustable clamp 4 are parallel to each other and protrude in a direction away from the surface of the cap body 1. The two ends of the adjustable clamp 4 each have a through hole and the two through holes are located on the same straight line.

[0031] The threaded hole is opened along the radial direction of the support shaft 6. The outer edge of the end of the handle 7 that is rotatably connected to the support shaft 6 is a cam structure. When the handle 7 rotates along the support shaft 6 toward the surface of the cap 1, the diameter of the cam structure gradually increases, thereby tightening both ends of the adjustable clamp 4.

[0032] The other end of the bolt 5 is provided with a disc-shaped screw head 8 protruding from the side of the bolt 5, and the outer surface of the screw head 8 is provided with friction texture.

[0033] like Figure 2As shown, a system for monitoring the degassing effect of a medium- and high-voltage cross-linked insulated wire core drying oven includes a device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying oven, a degassing chamber 9, an exhaust pipe 10, a container 11, an infrared gaseous byproduct counter 12, and a data acquisition and processing system 13. The device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying oven is installed inside the degassing chamber 9 at the end of the medium- and high-voltage cross-linked insulated wire core and sealed and locked. One end of the exhaust pipe 10 is connected to the exhaust port of the device for monitoring the degassing effect of the medium- and high-voltage cross-linked insulated wire core drying oven, and the other end of the exhaust pipe 10 extends out of the degassing chamber 9 and is connected to the side wall of the container 11. The infrared gaseous byproduct counter 12 is installed on the inner wall of the container 11 and is connected to the data acquisition and processing system 13 to upload the collected gaseous byproduct information to the data acquisition and processing system 13 for processing.

[0034] Container 11 is a semi-open container, and graduations are provided on its side wall. The exhaust pipe 10 is a flexible PU tube with an inner diameter of 6.1 mm and a wall thickness of 1 mm. A test liquid, purified water, is added to container 11 to make the invisible gas released by the cross-linked insulated wire core visible, facilitating the monitoring system to process and statistically analyze the degassing effect of the cross-linked insulated wire core.

[0035] A method for monitoring the degassing effect of a drying oven based on a medium- and high-voltage cross-linked insulated wire core degassing system includes the following steps: S1. Clean the surface of the medium and high voltage cross-linked insulated wire core with dust-free paper to ensure that the air-degassing effect monitoring device of the medium and high voltage cross-linked insulated wire core drying room is sealed and does not leak air.

[0036] S2. Install the medium- and high-voltage cross-linked insulated wire core drying oven degassing effect monitoring device at the end of the medium- and high-voltage cross-linked insulated wire core and lock it in place through the cap fastening mechanism. The length of the medium- and high-voltage cross-linked insulated wire core inserted into the cap 1 should be greater than the position of the elastic clamp 4, so that the elastic clamp 4 can tighten the cap 1 at the end of the medium- and high-voltage cross-linked insulated wire core. The inner lining layer 3 is tightly fitted with the medium- and high-voltage cross-linked insulated wire core to prevent air leakage and avoid inaccurate degassing effect data due to air leakage.

[0037] S3. One end of the exhaust pipe 10 is connected to the exhaust port of the medium- and high-voltage cross-linked insulated wire core drying oven degassing effect monitoring device. To ensure a tight connection, electrical tape is tightly wrapped around the connection between the exhaust pipe 10 and the exhaust port for 5-8 turns. The other end of the exhaust pipe guides the gaseous byproducts generated by the medium- and high-voltage cross-linked insulated wire core into a container, which is then sealed with sealant to prevent leakage of the test liquid and eliminate the influence of different test liquid levels on the accuracy of the degassing effect of the medium- and high-voltage cross-linked insulated wire core.

[0038] S4. Inject a certain volume of test liquid into container 11 to ensure that the other end of exhaust pipe 10 is at a certain depth below the test liquid level.

[0039] S5. The infrared gaseous byproduct counter 12 collects the quantity of gaseous byproducts per unit time and uploads it to the data acquisition and processing system 13. The data acquisition and processing system 13 performs statistical analysis on the degassing effect through a program.

[0040] S6. When the data acquisition and processing system 13 detects that the gaseous by-product release rate Q is less than or equal to the preset threshold, it determines that the degassing has met the standard and issues an alarm notification. Q = ΔP / ΔT, where ΔP is the amount of gaseous by-products released in the container, and ΔT is the detection time. After the test is completed, technicians can manually confirm the degassing in the container 11 outside the degassing chamber 9 using the scale. If the manual confirmation result matches the system detection result, the final degassing is determined to be completed, and the process can proceed to the next production step.

[0041] This invention allows technicians to monitor the degassing effect of cross-linked insulated wire cores in real time from outside the degassing chamber without entering the drying chamber. This eliminates the significant safety hazards and potential personal injury risks associated with technicians entering the degassing chamber during testing. The invention is easy to install, requiring no multiple personnel; a single technician can operate it independently. It utilizes a data acquisition and processing system to collect and process data, enabling real-time tracking and statistical analysis of the degassing effect. The invention positions the end of the cross-linked insulated wire core within a monitoring container equipped with a scale to fix the depth of the end in the test liquid. This eliminates inaccurate statistics on the amount of gaseous byproducts released by the cross-linked insulated wire core due to varying depths of immersion in the test liquid each time, thus affecting the judgment of the degassing effect. Furthermore, this invention eliminates deviations in the depth of the cross-linked insulated wire core end immersion in the testing container caused by uneven processing of the cross-linked insulated wire core end, improving the accuracy of data statistics. The invention is also easy to operate and can be implemented using standardized operating procedures.

[0042] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A method for monitoring the degassing effect of a medium- and high-voltage cross-linked insulated wire core drying oven based on a degassing effect monitoring system. The system comprises a medium- and high-voltage cross-linked insulated wire core drying oven degassing effect monitoring device, a degassing chamber, an exhaust pipe, a container, an infrared gaseous byproduct counter, and a data acquisition and processing system. The monitoring device is installed inside the degassing chamber at the end of the medium- and high-voltage cross-linked insulated wire core and sealed tightly. One end of the exhaust pipe is connected to the exhaust port of the monitoring device. The exhaust pipe also... One end extends out of the degassing chamber and connects to the side wall of the container. An infrared gaseous byproduct counter is installed on the inner wall of the container and connected to the data acquisition and processing system to upload the collected gaseous byproduct information to the data acquisition and processing system for processing. The medium and high voltage cross-linked insulated wire core drying chamber degassing effect monitoring device includes a cap, a one-way exhaust valve and a cap fastening mechanism. One end of the cap is closed and has an exhaust port. The one-way exhaust valve is installed in the exhaust port. The other end of the cap matches the medium and high voltage cross-linked insulated wire core. In use, it is sleeved on the end of the medium and high voltage cross-linked insulated wire core and sealed and fixed by the cap fastening mechanism. Its features Includes the following steps: S1. Clean the impurities from the surface of the medium and high voltage cross-linked insulated wire core; S2. Install the degassing effect monitoring device of the medium and high voltage cross-linked insulated wire core drying room at the end of the medium and high voltage cross-linked insulated wire core, and lock and fix it through the cap fastening mechanism. S3. One end of the exhaust pipe is connected to the exhaust port of the medium and high voltage cross-linked insulated wire core drying oven degassing effect monitoring device, and the other end of the exhaust pipe leads the gaseous byproducts generated by the medium and high voltage cross-linked insulated wire core into the container. S4. Inject the test liquid into the container; S5. The infrared gaseous byproduct counter collects the quantity of gaseous byproducts per unit time and uploads it to the data acquisition and processing system. The data acquisition and processing system performs statistical analysis on the degassing effect. S6. When the data acquisition and processing system detects that the gaseous by-product release rate Q is less than or equal to the preset threshold, it determines that the degassing meets the standard and issues an alarm notification. Q=ΔP / ΔT, where ΔP is the amount of gaseous by-products released in the container and ΔT is the detection time.

2. The method for monitoring degassing effect according to claim 1, characterized in that: The cap body is a circular tube structure with one end closed. The exhaust port is located on the closed end face of the cap body. The inner diameter of the cap body matches the outer diameter of the medium and high voltage cross-linked insulated wire core.

3. The method for monitoring degassing effect according to claim 1, characterized in that: An inner lining layer is provided on the inner wall of the cap.

4. The method for monitoring degassing effect according to claim 1, characterized in that: The cap fastening mechanism includes a retractable clamp, a bolt, a support shaft, and a handle. The retractable clamp is fitted on the outside of the cap. Both ends of the retractable clamp have through holes that match the bolt. The support shaft has a threaded hole. One end of the bolt passes through the through holes at both ends of the retractable clamp and is then screwed into the threaded hole of the support shaft. The handle is rotatably mounted on the support shaft.

5. The method for monitoring degassing effect according to claim 4, characterized in that: The adjustable clamp has a C-shaped structure, and the inner diameter of the inner circle of the C-shaped structure matches the outer diameter of the cap. The two ends of the adjustable clamp are parallel to each other and extend in a direction away from the surface of the cap. Each end of the adjustable clamp has a through hole, and the two through holes are located on the same straight line.

6. The method for monitoring degassing effect according to claim 4, characterized in that: The threaded hole is opened along the radial direction of the support shaft. The outer edge of the end where the handle is rotatably connected to the support shaft is a cam structure. When the handle rotates along the support shaft towards the surface of the cap, the diameter of the cam structure gradually increases, thereby tightening both ends of the adjustable clamp.

7. The method for monitoring degassing effect according to claim 4, characterized in that: The other end of the bolt is provided with a disc-shaped screw head that protrudes from the side of the bolt, and the outer surface of the screw head is provided with friction texture.

8. The method for monitoring degassing effect according to claim 1, characterized in that: The container is a semi-open container, and the side wall of the container is marked with graduations.

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