CN113346415A - High-voltage direct-current submarine cable flexible joint degassing device, monitoring system and method - Google Patents
High-voltage direct-current submarine cable flexible joint degassing device, monitoring system and method Download PDFInfo
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- CN113346415A CN113346415A CN202110516314.7A CN202110516314A CN113346415A CN 113346415 A CN113346415 A CN 113346415A CN 202110516314 A CN202110516314 A CN 202110516314A CN 113346415 A CN113346415 A CN 113346415A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02G—INSTALLATION OF ELECTRIC CABLES OR LINES, OR OF COMBINED OPTICAL AND ELECTRIC CABLES OR LINES
- H02G1/00—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines
- H02G1/14—Methods or apparatus specially adapted for installing, maintaining, repairing or dismantling electric cables or lines for joining or terminating cables
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
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Abstract
The invention discloses a degassing device, a degassing monitoring system and a degassing monitoring method for a flexible joint of a high-voltage direct-current submarine cable, the degassing device is characterized in that a degassing cavity for placing a soft joint is arranged on the shell, a vacuum pump interface, an exhaust port and 2 cable interfaces are arranged on the shell, so that the soft joint is placed in a degassing cavity of the shell through the cable port, and by arranging a heating module at the bottom of the shell, arranging a detection end of a temperature detection module in the shell and arranging a pressure detection module outside the shell, and a controller is connected with the heating module to enable the cable flexible joint to degas at preset temperature and pressure values, and then realize the independent degasification treatment to the soft joint, can avoid placing soft joint and cable in the degasification room under the same degasification condition and degasification effect unsatisfactory problem that the cable soft joint that leads to is processed simultaneously.
Description
Technical Field
The invention relates to the technical field of high-voltage direct-current submarine cables, in particular to a high-voltage direct-current submarine cable flexible joint degassing device, a degassing monitoring system and a monitoring method.
Background
With the increasing demand of Chinese electric power and the development of a large amount of energy, cross-sea power transmission becomes an important development direction in the field of direct current power transmission. High voltage direct current submarine cables are widely used as one of the most important devices in submarine power transmission engineering due to the significant advantages in the aspects of electric power trade, balance of electric power supply and demand and the like, and the development of high voltage class direct current submarine cables has become a main mode for cross-sea area electric power energy interconnection. Currently, high-voltage direct-current submarine cables are mainly used for long-distance power transmission between islands, continents and between islands and continents.
Continuous length is one of the basic requirements of a sea cable. If the individual lengths do not meet the engineering requirements due to limitations of the manufacturing equipment, the cables can be connected to the required lengths in the manufacturing plant using flexible connectors. The thickness and structure of the insulating layer of the soft joint are different. The main insulation of the soft joint can generate crosslinking byproducts in the crosslinking process, and the insulation performance of the cable is influenced. Usually, before the submarine cable is launched, the cable equipped with the soft joint needs to be degassed in a special degassing room, resulting in a long degassing time, generally 7-12 days. The degassing treatment mode has at least the following defects:
firstly, the degassing time is long, so that the production period is long and resources are wasted;
secondly, because the degassing of the soft joint and the cable is carried out simultaneously in the same degassing room, and the insulation structures of the soft joint and the cable are different, the soft joint and the cable are treated under the same degassing condition, and the degassing effect is not ideal.
Disclosure of Invention
The invention provides a degassing device, a degassing monitoring system and a degassing monitoring method for a flexible connector of a high-voltage direct-current submarine cable, aiming at solving the technical problem that a degassing treatment mode in the prior art has defects.
The invention provides a degassing device for a flexible joint of a high-voltage direct-current submarine cable, which comprises:
the device comprises a shell, a vacuum pump connector, an exhaust port and 2 cable connectors, wherein a degassing cavity used for placing a soft joint is formed in the shell, a heating module is arranged at the bottom of the shell, the shell is provided with the vacuum pump connector, the exhaust port and the 2 cable connectors, and the vacuum pump connector and the exhaust port are respectively communicated with the degassing cavity; the vacuum pump interface is used for connecting a vacuum pump; the cable interfaces are arranged on the left side plate and the right side plate of the shell in pairs;
the detection end of the temperature detection module is arranged in the shell;
a pressure detection module disposed outside the housing;
and the controller is respectively connected with the heating module and the temperature detection module.
Preferably, the soft joint degassing device further comprises a sealing ring, and the sealing ring is arranged in the cable interface.
Preferably, the vacuum pump interface is arranged at a position close to the lower left corner of the upper plate of the shell, and the exhaust port is arranged at the upper part of the right side plate of the shell.
Preferably, the detection end of the temperature detection module is embedded in the center of the rear side plate of the housing.
Compared with the prior art, the degassing device for the high-voltage direct-current submarine cable soft joint is characterized in that the shell is provided with a degassing cavity for placing the soft joint, the shell is provided with a vacuum pump interface, an exhaust port and 2 cable interfaces, so that the soft joint is placed in a degassing cavity of the shell through the cable port, and by arranging a heating module at the bottom of the shell, arranging a detection end of a temperature detection module in the shell and arranging a pressure detection module outside the shell, and a controller is connected with the heating module to enable the cable flexible joint to degas at preset temperature and pressure values, and then realize the independent degasification treatment to the soft joint, can avoid placing soft joint and cable in the degasification room under the same degasification condition and degasification effect unsatisfactory problem that the cable soft joint that leads to is processed simultaneously.
The invention provides a degassing monitoring system for a flexible connector of a high-voltage direct-current submarine cable, which comprises a vacuum processing device, a gas collecting and analyzing device and the degassing device for the flexible connector of the high-voltage direct-current submarine cable, wherein the vacuum processing device is connected with the vacuum processing device;
the vacuum treatment device, the high-voltage direct-current submarine cable flexible joint degassing device and the gas collection and analysis device are sequentially connected;
the vacuum processing device comprises a vacuum pump, and the vacuum pump is connected with a vacuum pump interface through a rubber pipe;
the gas collection and analysis device comprises a gas collection device and a gas chromatography mass spectrometer, the collection end of the gas collection device is connected with the gas outlet, and the gas output end of the gas collection device is connected with the gas inlet of the gas chromatography mass spectrometer.
Preferably, the collection end of the gas collection device is connected with the gas outlet through a first connecting pipe, the gas output end of the gas collection device is connected with the gas inlet of the gas chromatography mass spectrometer through a second connecting pipe, a first gas switch is arranged on the first connecting pipe, and a second gas switch is arranged on the second connecting pipe.
Compared with the prior art, the degassing monitoring system for the high-voltage direct-current submarine cable soft joint comprises a vacuum processing device, a degassing device for the high-voltage direct-current submarine cable soft joint and a gas collecting and analyzing device which are sequentially connected, wherein a vacuum pump in the vacuum processing device is connected with a vacuum pump interface in the degassing device to achieve degassing processing of the soft joint, the gas exhaust port is arranged to be connected with a collecting end of the gas collecting device to collect and analyze gas generated in the degassing process of the soft joint, and the degassing process of the soft joint is further monitored according to a gas analysis result, so that the monitoring system capable of accurately monitoring the degassing process of the soft joint is provided.
The third aspect of the present invention provides a degassing monitoring method for a flexible joint of a high voltage dc submarine cable, which uses the degassing monitoring system for a flexible joint of a high voltage dc submarine cable to monitor a degassing process of the flexible joint, comprising:
passing a cable splice sample through the cable port such that the cable splice sample is disposed within the degassing cavity of the housing;
vacuumizing the degassing cavity by using a vacuum pump under a preset vacuum pressure value;
the controller is adopted to control the heating module to continuously heat the cable flexible joint sample at a preset temperature to obtain a crosslinking byproduct gas;
collecting the crosslinking byproduct gas by adopting the gas collecting device every preset time period, and transmitting the crosslinking byproduct gas to the gas chromatographic mass spectrometer to obtain a chromatographic analysis result and a mass spectrometry analysis result of the crosslinking byproduct gas;
and when the chromatographic analysis result and the mass spectrum analysis result of the crosslinking byproduct gas are detected to meet the preset conditions, determining that the cable flexible joint sample is degassed.
Preferably, the results of the chromatographic analysis and the mass spectrometry analysis of the crosslinking by-product gas are the results of the composition and content of the crosslinking by-product gas; then, when it is detected that the chromatographic analysis result and the mass spectrometry result of the crosslinking byproduct gas satisfy a preset condition, it is determined that the cable flexible joint sample is degassed, specifically:
and when the content of the crosslinking byproduct gas reaches a stable state, judging that the degassing of the cable flexible joint sample is finished.
Compared with the prior art, the degassing monitoring method for the high-voltage direct-current submarine cable flexible joint, provided by the invention, has the advantages that the cable flexible joint is placed in a degassing monitoring system for the high-voltage direct-current submarine cable flexible joint, degassing treatment is carried out on the flexible joint, the cross-linking by-product gas generated by degassing is collected and then transmitted to the gas chromatography mass spectrometer, the chromatographic analysis result and the mass spectrometry analysis result of the cross-linking by-product gas are obtained, whether the flexible joint is degassed or not is judged according to the chromatographic analysis result and the mass spectrometry analysis result of the cross-linking by-product gas, the degassing process of the flexible joint is monitored, the degassing treatment can be carried out on the flexible joint, and the degassing of the flexible joint is more sufficient.
Drawings
Fig. 1 is a structural diagram of a degasser for a flexible joint of a high voltage dc submarine cable according to an embodiment of the present invention;
FIG. 2 is a block diagram of a degassing monitoring system for a flexible joint of a high voltage DC submarine cable according to a second embodiment of the present invention;
FIG. 3 is a schematic flow chart of a degassing monitoring method for a flexible joint of a high-voltage direct-current submarine cable according to a third embodiment of the present invention;
FIG. 4 is a reaction scheme for the generation of cross-linking by-products provided by the present invention;
fig. 5 is a graph of gas content obtained by degassing a 525kV dc cable flexible joint by using the degassing monitoring method for a high voltage dc submarine cable flexible joint provided by the third embodiment of the present invention, as a function of degassing time;
in the figure: 1. a high-voltage direct-current submarine cable flexible joint degassing device; 11. a housing; 12. a heating module; 13. A vacuum pump interface; 14. an exhaust port; 15. a cable interface; 16. the detection end of the temperature detection module; 17. a pressure detection module; 18. a controller; 19. a seal ring; 2. a vacuum processing device; 21. a vacuum pump; 3. a gas collection and analysis device; 31. a gas collection device; 32. gas chromatography mass spectrometry.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "rear", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example one
Referring to fig. 1, fig. 1 is a structural diagram of a flexible joint degassing device for a high-voltage direct-current submarine cable according to an embodiment of the present invention.
The embodiment of the invention provides a degassing device 1 for a flexible connector of a high-voltage direct-current submarine cable, which comprises:
the heating device comprises a shell 11, wherein a degassing cavity for placing a soft joint is arranged in the shell 11, a heating module 12 is arranged at the bottom of the shell 11, a vacuum pump interface 13, an exhaust port 14 and 2 cable interfaces 15 are arranged on the shell 11, and the vacuum pump interface 13 and the exhaust port 14 are respectively communicated with the degassing cavity; the vacuum pump interface 15 is used for connecting a vacuum pump; the cable ports 15 are arranged in pairs on the left side plate and the right side plate of the housing 11;
a temperature detection module, a detection end 16 of which is arranged in the housing;
a pressure detection module 17, the pressure detection module 17 being disposed outside the housing;
and the controller 18 is respectively connected with the heating module 12 and the temperature detection module.
In the embodiment of the present invention, the controller 18 is connected to the heating module 12, so that the controller 18 can control the temperature heated by the heating module 12, and further control the temperature in the degassing cavity. And through setting up temperature detection module to make temperature detection module with the controller is connected, make the controller can control the heating temperature of heating module according to the temperature numerical value that detects, and then make the temperature in the casing 11 maintain preset temperature. Specifically, the pressure signal output by the pressure detection module 17 may be processed by a microprocessor or other processing equipment to obtain a specific vacuum pressure value, and the specific vacuum pressure value is compared with a preset vacuum pressure value to determine whether to continue the evacuation process of the housing 11.
In the embodiment of the present invention, the temperature detection module may be a temperature sensor, and the pressure detection module 17 may be a pressure sensor or a pressure gauge.
In an alternative embodiment, the degassing device 1 for a flexible cable joint further comprises a sealing ring 19, wherein the sealing ring 19 is arranged in the cable joint 15. Through cable interface 15 sets up sealing washer 19, can make the degasification environment is airtight more, and can with the environment of degasification cavity with the external environment of casing 11 is isolated, further guarantees the vacuum.
In another alternative embodiment, the vacuum pump port 13 is disposed near the lower left corner of the upper plate of the housing 11, and the exhaust port 14 is disposed at the upper portion of the right plate of the housing 11.
In yet another alternative embodiment, the detection end 16 of the temperature detection module is embedded in the center of the rear side plate of the housing 11.
In yet another alternative embodiment, the cable ports 15 are provided in pairs in the center of the left and right side plates of the housing.
In yet another alternative embodiment, the pressure detection module 17 abuts against a lower left corner of a front side plate of the housing 11. By abutting the pressure detection module 17 against the lower left corner of the front side plate of the housing 11, the result of the pressure detection module detection 17 can be made more accurate.
Example two
Referring to fig. 2, fig. 2 is a structural diagram of a degassing monitoring system for a flexible joint of a high-voltage direct-current submarine cable according to a second embodiment of the present invention.
The degassing monitoring system for the high-voltage direct-current submarine cable flexible joint provided by the embodiment II of the invention comprises a vacuum processing device 2, a gas collection and analysis device 3 and the degassing device 1 for the high-voltage direct-current submarine cable flexible joint provided by the embodiment I;
the vacuum treatment device 2, the high-voltage direct-current submarine cable flexible joint degassing device 1 and the gas collection and analysis device 3 are sequentially connected;
the vacuum processing device 2 comprises a vacuum pump 21, and the vacuum pump 21 is connected with the vacuum pump interface 13 through a rubber pipe;
the gas collection and analysis device 3 comprises a gas collection device 31 and a gas chromatography mass spectrometer 32, the collection end of the gas collection device 31 is connected with the exhaust port 14, and the gas output end of the gas collection device 31 is connected with the gas inlet of the gas chromatography mass spectrometer 32.
In the present embodiment, the gas chromatography mass spectrometer 32 performs both chromatographic analysis and mass spectrometry on the collected gas. The gas chromatography mass spectrometer 32 performs chromatographic analysis and mass spectrometry on the collected gas, which belong to the prior art and are divided into two processes of gas chromatographic analysis and gas mass spectrometry.
The mobile phase of the gas chromatography is inert gas, and the gas-fixation chromatography uses an adsorbent with large surface area and certain activity as a stationary phase. After a multi-component mixed sample enters a chromatographic column, due to the different adsorption force of the adsorbent to each component, the running speed of each component in the chromatographic column is different after a certain time. The less strongly adsorbed component is readily desorbed first from the column and enters the detector, whereas the most strongly adsorbed component is least readily desorbed and therefore leaves the column. In this way, the components are separated from each other in the column and sequentially detected and recorded in the detector.
The mass spectrometry is an analysis method for measuring the charge-to-mass ratio of ions, and the basic principle is that all components in a sample are ionized in an ion source to generate ions with different charge-to-mass ratios and positive charges, and the ions form an ion beam under the action of an accelerating electric field and enter a mass analyzer. In the mass analyzer, the mass is determined by dispersing the generated opposite velocities by an electric field and a magnetic field, and focusing them to obtain mass spectra.
The degassing monitoring system for the high-voltage direct-current submarine cable soft joint comprises a vacuum processing device 2, a degassing device 1 for the high-voltage direct-current submarine cable soft joint and a gas collecting and analyzing device 3 which are sequentially connected, wherein a vacuum pump 21 in the vacuum processing device 2 is connected with a vacuum pump interface 13 in the degassing device 1 to achieve degassing processing of the soft joint, the gas generated in the degassing process of the soft joint is collected and analyzed by arranging an exhaust port 14 to be connected with a collecting end of a gas collecting device 31, and the degassing process of the soft joint is monitored according to a gas analysis result, so that the monitoring system for accurately monitoring the degassing process of the soft joint is provided.
In an alternative embodiment, the collection end of the gas collection device 31 is connected to the gas outlet 14 through a first connection pipe, the gas output end of the gas collection device 31 is connected to the gas inlet of the gas chromatography mass spectrometer 32 through a second connection pipe, and a first gas switch is arranged on the first connection pipe, and a second gas switch is arranged on the second connection pipe. The first gas switch is arranged on the connecting pipe between the collecting end of the gas collecting device 31 and the exhaust port 14, so that whether gas is conveyed or not is controlled, and the gas collecting time can be adjusted according to actual conditions.
In yet another alternative embodiment, the gas collection and analysis device 3 further comprises a PC, and the gas chromatography mass spectrometer 32 is connected to the PC. By connecting the gas collection and analysis device 3 to a PC, the PC processes the analysis result output by the gas chromatography mass spectrometer 32, and further can perform further analysis processing on the analysis result output by the gas chromatography mass spectrometer 32, so as to better monitor the degassing process of the soft joint. Illustratively, a change trend curve chart of degassing gas time can be drawn according to a chromatographic analysis result and a mass spectrum analysis result in the PC analysis software (the analysis software adopts the existing software), and the degassing process can be visually observed according to the trend curve chart, so that the real-time monitoring of the whole degassing process of the soft joint can be realized.
EXAMPLE III
Referring to fig. 3, fig. 3 is a schematic flow chart of a method for monitoring degassing of a flexible joint of a high-voltage direct-current submarine cable according to a third embodiment of the present invention.
The degassing monitoring method for the flexible connector of the high-voltage direct-current submarine cable provided by the third embodiment of the invention comprises the following steps of S11 to S15:
a step S11 of passing a cable splice sample through the cable port such that the cable splice sample is disposed within the degassing cavity of the housing;
step S12, carrying out vacuum pumping treatment on the degassing cavity by adopting a vacuum pump under a preset vacuum pressure value;
step S13, the controller is adopted to control the heating module to continuously heat the cable flexible joint sample at a preset temperature to obtain a crosslinking byproduct gas;
step S14, collecting the crosslinking byproduct gas by using the gas collecting device every preset time period, and transmitting the crosslinking byproduct gas to the gas chromatography mass spectrometer to obtain a chromatographic analysis result and a mass spectrometry result of the crosslinking byproduct gas;
and step S15, when the chromatographic analysis result and the mass spectrometry result of the crosslinking byproduct gas are detected to meet preset conditions, determining that the cable flexible joint sample is degassed.
In the embodiment of the present invention, the result of the chromatographic analysis and the result of the mass spectrometry of the crosslinking by-product gas are the result of the composition and content of the crosslinking by-product gas. Further, in step S15, "when it is detected that the chromatographic analysis result and the mass spectrometry result of the crosslinking byproduct gas satisfy a preset condition, determining that the degassing of the cable flexible joint sample is completed", specifically:
and when the content of the crosslinking byproduct gas reaches a stable state, judging that the degassing of the cable flexible joint sample is finished.
In specific implementation, the preset temperature can be set to 70 ℃, and the preset vacuum pressure value can be set to 100 Pa.
It can be understood that the cable flexible joint insulating layer contains crosslinking byproducts, the crosslinking byproducts are heated and volatilized to become gas, the gas is stored in the degassing cavity, in order to monitor the degassing process of the flexible joint, the gas of the crosslinking byproducts needs to be collected and analyzed, specifically, the gas collection device can be used for collecting the gas from the degassing cavity once at regular time, and the preset time period is set to be 5 minutes according to experience. When the crosslinking byproduct gas is collected, the pressure of the gas collecting device can be adjusted to be lower than the pressure value of the degassing cavity, the first air switch is opened to collect the crosslinking byproduct gas, and when the collected crosslinking byproduct gas reaches the expected collection amount, the first air switch is closed, and the pressure of the collecting and collecting device is recovered. Similarly, when the collected crosslinking byproduct gas is delivered to the gas chromatography mass spectrometer, the pressure of the gas collection device can be adjusted to be higher than the pressure of the space where the gas chromatography mass spectrometer is located, and the degassed gas can be introduced into the chromatography mass spectrometer for analysis by opening the second air switch.
During specific implementation, the chromatographic analysis result and the mass spectrometry analysis result, namely the gas component and content analysis result, can be synchronously transmitted to the PC, the PC is internally provided with analysis software (the analysis software adopts the existing software), a change trend curve chart of the degassing gas time is drawn according to the chromatographic analysis result and the mass spectrometry analysis result, and the degassing process can be visually observed according to the trend curve chart, so that the real-time monitoring of the whole degassing process can be realized.
Referring to fig. 4, fig. 4 is a reaction formula for generating a crosslinking byproduct according to the present invention. The polyethylene is subjected to a crosslinking reaction by a crosslinking agent dicumyl peroxide to form crosslinked polyethylene. During crosslinking, DCP produces a series of by-products remaining in the cable insulation, mainly comprising cumyl alcohol, acetophenone and α -methyl-styrene; the by-product is volatile substance which can be released from the surface of the cable under the action of high temperature and high pressure, namely the degassing process of the cable.
Referring to fig. 5, fig. 5 is a graph of gas content obtained by degassing a 525kV dc cable flexible joint by using the degassing monitoring method for a high-voltage dc submarine cable flexible joint provided by the third embodiment of the present invention, as a function of degassing time. In specific implementation, the change rule of the content of the outgassed by-products in the soft joint of the 525kV high-voltage direct-current cable along with the degassing time is obtained by collecting the degassing gases at different degassing times. When the degassing is carried out for a period of time and the volatilization amount of the crosslinking by-products in the cable insulation layer of the soft joint is detected to be stable, the degassing of the soft joint is considered to be finished at the moment.
While the foregoing is directed to the preferred embodiment of the present invention, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention.
Claims (10)
1. A high voltage direct current submarine cable flexible joint degasser, characterized by comprising:
the device comprises a shell, a vacuum pump connector, an exhaust port and 2 cable connectors, wherein a degassing cavity used for placing a soft joint is formed in the shell, a heating module is arranged at the bottom of the shell, the shell is provided with the vacuum pump connector, the exhaust port and the 2 cable connectors, and the vacuum pump connector and the exhaust port are respectively communicated with the degassing cavity; the vacuum pump interface is used for connecting a vacuum pump; the cable interfaces are arranged on the left side plate and the right side plate of the shell in pairs;
the detection end of the temperature detection module is arranged in the shell;
a pressure detection module disposed outside the housing;
and the controller is respectively connected with the heating module and the temperature detection module.
2. The degasser for flexible joint of high voltage dc submarine cable according to claim 1, further comprising:
a seal ring disposed within the cable interface.
3. The high voltage dc submarine cable flexible joint degassing apparatus according to claim 1, wherein said vacuum pump port is provided near the lower left corner of the upper plate of the housing, and said exhaust port is provided at the upper portion of the right plate of the housing.
4. The degasser of claim 1, wherein the sensing end of the temperature sensing module is embedded in the center of the rear plate of the housing.
5. The high voltage dc submarine cable flexible joint degassing apparatus according to claim 1, in which the cable ports are arranged in pairs in the centre of the left and right side plates of the housing.
6. The degasser for flexible joint of high voltage dc submarine cable according to claim 1, where the pressure detection module is located immediately at the lower left corner of the front plate of the housing.
7. A degassing monitoring system for a flexible joint of a high-voltage direct-current submarine cable, which comprises a vacuum processing device, a gas collection and analysis device and the degassing device for the flexible joint of the high-voltage direct-current submarine cable according to claim 1;
the vacuum treatment device, the high-voltage direct-current submarine cable flexible joint degassing device and the gas collection and analysis device are sequentially connected;
the vacuum processing device comprises a vacuum pump, and the vacuum pump is connected with a vacuum pump interface through a rubber pipe;
the gas collection and analysis device comprises a gas collection device and a gas chromatography mass spectrometer, the collection end of the gas collection device is connected with the gas outlet, and the gas output end of the gas collection device is connected with the gas inlet of the gas chromatography mass spectrometer.
8. The degassing monitoring system for the flexible connector of the high-voltage direct current submarine cable according to claim 7, wherein the collection end of the gas collection device is connected with the gas outlet through a first connection pipe, the gas output end of the gas collection device is connected with the gas inlet of the gas chromatography mass spectrometer through a second connection pipe, and a first gas switch is arranged on the first connection pipe and a second gas switch is arranged on the second connection pipe.
9. A degassing monitoring method for a flexible joint of a high-voltage direct-current submarine cable, which is characterized in that the degassing monitoring system for the flexible joint of the high-voltage direct-current submarine cable according to claim 7 is used for monitoring the degassing process of the flexible joint and comprises the following steps:
passing a cable splice sample through the cable port such that the cable splice sample is disposed within the degassing cavity of the housing;
vacuumizing the degassing cavity by using a vacuum pump under a preset vacuum pressure value;
the controller is adopted to control the heating module to continuously heat the cable flexible joint sample at a preset temperature to obtain a crosslinking byproduct gas;
collecting the crosslinking byproduct gas by adopting the gas collecting device every preset time period, and transmitting the crosslinking byproduct gas to the gas chromatographic mass spectrometer to obtain a chromatographic analysis result and a mass spectrometry analysis result of the crosslinking byproduct gas;
and when the chromatographic analysis result and the mass spectrum analysis result of the crosslinking byproduct gas are detected to meet the preset conditions, determining that the cable flexible joint sample is degassed.
10. The degassing monitoring method for the flexible joint of the high-voltage direct current submarine cable according to claim 9, wherein the results of the chromatographic analysis and the mass spectrometry analysis of the crosslinking by-product gas are the results of the composition and content of the crosslinking by-product gas; then, when it is detected that the chromatographic analysis result and the mass spectrometry result of the crosslinking byproduct gas satisfy a preset condition, it is determined that the cable flexible joint sample is degassed, specifically:
and when the content of the crosslinking byproduct gas reaches a stable state, judging that the degassing of the cable flexible joint sample is finished.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110516314.7A CN113346415A (en) | 2021-05-12 | 2021-05-12 | High-voltage direct-current submarine cable flexible joint degassing device, monitoring system and method |
| PCT/CN2021/124842 WO2022237070A1 (en) | 2021-05-12 | 2021-10-20 | Degassing apparatus for flexible joint of high-voltage direct-current submarine cable, and degassing monitoring system and method therefor |
| PCT/CN2021/125263 WO2022237075A1 (en) | 2021-05-12 | 2021-10-21 | Degassing device, degassing monitoring system and degassing monitoring method for flexible joint of high-voltage direct current submarine cable |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110516314.7A CN113346415A (en) | 2021-05-12 | 2021-05-12 | High-voltage direct-current submarine cable flexible joint degassing device, monitoring system and method |
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| CN202110516314.7A Pending CN113346415A (en) | 2021-05-12 | 2021-05-12 | High-voltage direct-current submarine cable flexible joint degassing device, monitoring system and method |
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| WO (2) | WO2022237070A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115133467A (en) * | 2022-06-29 | 2022-09-30 | 宁波东方电缆股份有限公司 | Manufacturing process of extra-high voltage direct current 800kV cable wrapping fusion type soft joint |
| WO2022237075A1 (en) * | 2021-05-12 | 2022-11-17 | 南方电网科学研究院有限责任公司 | Degassing device, degassing monitoring system and degassing monitoring method for flexible joint of high-voltage direct current submarine cable |
| WO2024065921A1 (en) * | 2022-09-28 | 2024-04-04 | 南方电网科学研究院有限责任公司 | Temperature measurement method and device for submarine cable factory joints |
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| CN116735456A (en) * | 2023-08-16 | 2023-09-12 | 煤炭科学技术研究院有限公司 | Device and method for measuring coal rock permeability |
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| WO2022237075A1 (en) | 2022-11-17 |
| WO2022237070A1 (en) | 2022-11-17 |
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