CN110887919A - Transformer oil chromatogram on-line monitoring system based on vacuum agitator - Google Patents
Transformer oil chromatogram on-line monitoring system based on vacuum agitator Download PDFInfo
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- CN110887919A CN110887919A CN201910396873.1A CN201910396873A CN110887919A CN 110887919 A CN110887919 A CN 110887919A CN 201910396873 A CN201910396873 A CN 201910396873A CN 110887919 A CN110887919 A CN 110887919A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N30/00—Investigating or analysing materials by separation into components using adsorption, absorption or similar phenomena or using ion-exchange, e.g. chromatography or field flow fractionation
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- G01N30/88—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86
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- G01N2030/884—Integrated analysis systems specially adapted therefor, not covered by a single one of the groups G01N30/04 - G01N30/86 analysis specially adapted for the sample organic compounds
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Abstract
The invention discloses a transformer oil chromatogram on-line monitoring system based on a vacuum stirrer, which comprises: the oil-gas separator is connected with the transformer through an oil pipeline, and a sealing valve is arranged on the oil pipeline; the output end of the oil-gas separator is connected to a chromatographic column through a cold trap; one end of the gas sensor is connected with the chromatographic column, and the other end of the gas sensor is electrically connected with the main controller; an ultrasonic degassing device is arranged in the oil-gas separator and comprises an oil chamber, a stepping motor, a piston and an ultrasonic oscillator, the piston is arranged in the oil chamber, one side of the piston is connected with the stepping motor, and the ultrasonic oscillator is arranged at the bottom end of the oil chamber. The invention has high automation degree, can realize the quick and effective separation of the dissolved gas of the transformer oil, improves the accuracy of the data of the monitoring system and ensures that the transformer can safely and stably operate.
Description
Technical Field
The invention belongs to the technical field of transformers, and particularly relates to a transformer oil chromatography online monitoring system based on a vacuum stirrer.
Background
The electric power industry in China is developing to large-unit, large-capacity and high-voltage-level power grids, and the key that electric power high-voltage equipment with higher requirements is stable and reliable operation of the power grids is provided for electric power safety and economic operation has important significance for guaranteeing social normal production and enterprise normal operation. The high-voltage and large-capacity power transformer is the most critical equipment in a power transmission and transformation system, and is influenced by various factors such as electricity, heat, machinery, environment and the like in actual operation, the insulation performance can be degraded, the safety performance is reduced, even faults are caused, and thus major power accidents such as local or even large-area power failure are caused, and huge direct or indirect economic loss and social influence are caused. Therefore, the system and the method carry out necessary monitoring on the high-voltage power equipment, ensure the stable operation of the high-voltage power equipment and have important significance on the reliability and the safety of the operation of a power system.
The implementation of power transformer fault diagnosis is very necessary to improve the reliability of the safe operation of the whole power system. When the transformer is in local overheating or partial discharge, the insulating oil or the solid insulator at the fault position can decompose small-molecule hydrocarbon gas (such as CH4, C2H6, C2H4, C2H2 and the like) and other gas (such as H2, CO2 and the like). The concentration of each gas in the oil and the Total Concentration (TCG) of combustible gas in the oil can be used as indexes for diagnosing the internal fault of the transformer equipment.
Conventionally, the operating condition of an oil-filled power device has been determined by analyzing dissolved gas in oil by gas chromatography as a common method for fault diagnosis. Its main advantage is that it can provide quantitative analysis of the concentration of various gases dissolved in oil. However, the operation process is complex, and a large amount of skilled professionals are needed for tracking detection and analysis. In addition, in order to stably operate the gas chromatography, a long preparation time (generally, several hours ahead of time for introducing a carrier gas to stabilize the gas flow) is required, resulting in high operation management costs. With the rapid development of China's electric power to large power grids, large units, high capacity and high voltage levels, increasingly high technical requirements are put forward for real-time grasping of the operation state of key electric power equipment, and the transformer oil chromatography online monitoring essentially changes the traditional transformer oil detection mode, thereby not only improving the enterprise management operation efficiency, but also effectively ensuring the safe reliability of transformer operation.
The oil-gas separation device in the transformer oil chromatography on-line monitoring system plays a vital role in detecting gas components in transformer insulating oil and in ensuring transformer safety. The principle used by the oil-gas separation device can directly influence the degassing efficiency, and if the degassing efficiency is low, the detection result cannot represent the real condition of gas in the insulating oil of the transformer, so that false alarm or missing alarm can be caused.
The currently common oil-gas separation methods mainly comprise a membrane/capillary permeation method, a vacuum degassing method and a headspace separation method. The membrane/capillary permeation method has a long equilibration time, and needs to be replaced regularly although the daily maintenance workload is small, so as to avoid the reduction of permeation efficiency caused by the aging of the membrane or the pollution of impurities in oil and have high operation and maintenance cost. The vacuum degassing method has high oil-gas separation speed, can realize continuous degassing, but has low treatment efficiency on bubbles in oil, and is easy to cause false alarm or false alarm. The headspace separation method is divided into a static headspace method and a dynamic headspace method, and the static headspace method has the advantages of high efficiency and good repeatability; a circulating oil taking mode is adopted, and an oil sample is representative; however, because the headspace oil sample is not isolated from the headspace gas sample, the desorbed gas sample contains a small amount of oil vapor, which can contaminate the chromatographic column and reduce the service life of the chromatographic column. The dynamic headspace type degassing has high degassing speed, efficiency and repeatability, but because the carrier gas is required to be continuously introduced, the circulating oil sample cannot be used so as to prevent the carrier gas from entering the oil tank of the transformer body, so that the oil sample has poor representativeness, the carrier gas is required to be continuously introduced, the circulating oil sample cannot be used, and the consumption of the carrier gas is high.
In addition, in the technical field of on-line monitoring of transformer oil chromatography, similar products in the market all need an external gas carrying cylinder to supply oil chromatography for degassing and gas phase separation. The gas-carrying bottle has the defect of variable gas storage capacity. According to the latest guidance suggestion (quality improvement scheme of the on-line monitoring device of the power transformation equipment) of the national power grid, the chromatographic monitoring period of the transformer oil is 2 hours, namely, sampling is carried out every two hours on site. Continuous and uninterrupted measurement is carried out to find the phenomenon of gas rise which is characteristic of sudden failure. According to the requirements of the former guide rules, the collection period of the transformer oil chromatographic sampling device is once a day, and the current target is at least 12 times a day, so that the service life of each bottle of carrier gas is shortened from half a year to a month. The use frequency of the carrier gas is high, so that the actual use period of each bottle of carrier gas is greatly reduced, and the carrier gas has to be frequently replaced. This is far from meeting the requirements of field use.
Therefore, how to provide a transformer oil chromatography online monitoring system based on a vacuum stirrer becomes a problem to be solved urgently by the technical personnel in the field.
Disclosure of Invention
In view of the above, the invention provides a transformer oil chromatography online monitoring system based on a vacuum stirrer, which has high automation degree, can realize the quick and effective separation of the dissolved gas of the transformer oil, improves the accuracy of the data of the monitoring system, and ensures that the transformer can safely and stably operate.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a transformer oil chromatogram on-line monitoring system based on vacuum agitator, includes: the oil-gas separator is connected with the transformer through an oil pipeline, and a sealing valve is arranged on the oil pipeline; the output end of the oil-gas separator is connected to the chromatographic column through the cold trap; one end of the gas sensor is connected with the chromatographic column, and the other end of the gas sensor is electrically connected with the main controller; the oil-gas separator is internally provided with an ultrasonic degassing device, the ultrasonic degassing device comprises an oil chamber, a stepping motor, a piston and an ultrasonic oscillator, the piston is arranged in the oil chamber, one side of the piston is connected with the stepping motor, and the ultrasonic oscillator is arranged at the bottom end of the oil chamber.
Further, the main controller is connected with an upper computer through a communication network, the upper computer is used for processing and analyzing data and transmitting the analyzed data to a database, a display, a spectrogram formulating device and a fault diagnosis system. The analysis data are transmitted to a database through the upper computer for data storage, so that the analysis, export, calling and the like of subsequent data are facilitated; the analysis data obtained by the processing and analysis of the upper computer can be intuitively displayed through the display; the analysis data can be presented in the form of a spectrogram through a spectrogram formulating device; the fault diagnosis system can obtain the cause of the fault of the transformer according to the analysis data and carry out fault diagnosis processing.
Further, an air outlet pipeline is arranged at the top end of the oil chamber, an electromagnetic valve is arranged on the air outlet pipeline, one end of the electromagnetic valve is connected with a gas concentration detection device, and the other end of the electromagnetic valve is connected with an exhaust pipeline; and the gas concentration detection device and the electromagnetic valve are electrically connected with a secondary controller. The gas concentration detection device detects the concentration of gas, and when the gas concentration detection device reaches the upper limit that it can hold gas, automatic signal to the sub-controller, the sub-controller controls the solenoid valve action promptly, realizes going on of gas outlet pipeline and exhaust pipe, and the gas in the oil chamber is whole to be discharged through exhaust pipe.
The ultrasonic degassing device comprises an ultrasonic degassing device, and is characterized by further comprising a carrier gas generating device, wherein the carrier gas generating device comprises a gas source generating mechanism, a carrier gas storage mechanism and a carrier gas purifying mechanism, the gas source generating mechanism compresses air and then sends the air into the carrier gas storage mechanism, and the carrier gas stored in the carrier gas storage mechanism is purified by the carrier gas purifying mechanism and then is sent into the ultrasonic degassing device. The carrier gas generating device is used for replacing a traditional carrier gas bottle, stable carrier gas is provided for the monitoring system, the accuracy of data of the monitoring system is guaranteed, the carrier gas bottle is prevented from being frequently replaced, and the carrier gas generating device is convenient to use.
Further, the carrier gas purification mechanism comprises a particle filter and a moisture filter, and the carrier gas stored in the carrier gas storage mechanism is sent into the ultrasonic degassing device after passing through the particle filter and the moisture filter in sequence. Particulate matter in the gas that mechanism produced takes place through the filterable air supply of particulate filter, for example impurity, dust mixed with, through the moisture filter moisture that carries in the filterable gas to the accuracy of monitoring system data has been guaranteed.
Further, particle filter includes the base member, evenly distributed has a plurality of sieve meshes on the base member, and is a plurality of the cross-section of sieve mesh all is tubaeform to loudspeaker open-ended direction is unanimous. The gas is blown to the substrate from the large hole to the small hole of the horn opening, and impurities, dust and the like mixed in the gas can be remained in the horn-shaped sieve pores, so that particles in the gas are effectively removed.
Further, the sealing valve comprises a connecting arm, an oil drain valve and an oil pipe, wherein the main body of the connecting arm is cylindrical, a through hole penetrating along the axial direction is formed in the center of the connecting arm, an inner cavity is formed in the center of the connecting arm, threads are arranged on the outer surface of the upper portion of the connecting arm, a screw hole matched with the threads on the outer surface of the upper portion of the connecting arm is formed in the oil drain valve, and the connecting arm is connected to the top of the connecting arm in a sealing mode through the; an oil pipe mounting hole is formed in the lower portion of the inner cavity of the connecting arm, and the oil pipe is inserted into the oil pipe mounting hole. The sealing valve can conveniently control the conduction and the cutoff of the transformer and the oil-gas separator, and effectively solves the problem of oil leakage at the joint of the oil drain valve and the oil pipe of the transformer oil chromatography online monitoring system.
Furthermore, an annular fixing groove is formed in the downward concave portion of the upper end of the connecting arm, a sealing flat ring is arranged in the fixing groove, and the sealing performance of the connecting position of the connecting arm and the oil drain valve is improved due to the arrangement of the sealing flat ring.
Furthermore, the upper part of the oil pipe mounting hole is cylindrical, and the radius of the oil pipe mounting hole is larger than that of the inner cavity of the connecting arm; the lower part is in a circular truncated cone shape and extends to the bottom of the connecting arm; and a hollow tower-shaped sealing ring is arranged in the oil pipe mounting hole. The arrangement of the hollow tower-shaped sealing ring improves the sealing performance of the joint of the connecting arm and the oil pipe.
Furthermore, sealing valve still includes lock nut and locking bolt, lock nut's inner wall with locking bolt's outer wall is equipped with the screw thread of mutually supporting respectively, overlaps jointly in the lower part periphery of linking arm, just the locking bolt inner wall forms shoulder edge in the second, shoulder edge supports in the second hollow turriform sealing washer. The tower-shaped sealing ring is extruded in the locking process of the locking nut and the locking bolt, so that the oil pipe is tightly combined with the oil pipe mounting hole of the connecting arm, and the oil pipe can be fixed while the full sealing is achieved.
The invention has the beneficial effects that:
the on-line monitoring system is simple in structure and convenient to operate, gas in the transformer can be separated and detected through the oil-gas separator, the cold trap, the chromatographic column, the gas-sensitive sensor and the main controller, and data can be comprehensively analyzed and diagnosed, so that on-line monitoring and analysis of transformer faults are realized, the accuracy of data of the monitoring system is effectively improved, and the safe and stable operation of the transformer is ensured; the gas generated in the oil-gas separator can remove oil vapor in the mixed gas through the cold trap, so that the pollution of the oil vapor to the chromatographic column is avoided; the ultrasonic degassing device is arranged, so that the dissolved gas of the transformer oil is quickly and effectively separated on the premise of no medium intervention, the degassing efficiency is high, the time is short, the repeatability is good, the pollution to the transformer insulating oil is avoided, and in the oil circulation process, the phenomenon that bubbles are mixed and injected back to the transformer body is avoided, so that the operation safety of the transformer is ensured; the sealing valve can conveniently control the conduction and the cutoff of the transformer and the oil-gas separator, and the problem of oil leakage at the joint of the oil drain valve and the oil pipe is effectively solved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of the present invention.
FIG. 2 is a schematic structural diagram of a carrier gas generating device according to the present invention.
Fig. 3 is a schematic structural diagram of a carrier gas purification mechanism according to the present invention.
FIG. 4 is a schematic structural view of an ultrasonic degassing apparatus according to the present invention.
Fig. 5 is a schematic structural diagram of the sealing valve of the invention.
Fig. 6 is a schematic structural diagram of the connecting arm of the invention.
Fig. 7 is a schematic structural diagram of the hollow tower-shaped sealing ring of the invention.
Fig. 8 is a schematic structural view of the lock nut of the present invention.
Fig. 9 is a schematic structural view of the lock bolt of the present invention.
Wherein, in the figure,
1-a transformer; 2-an oil-gas separator; 3-cold trap; 4-a chromatographic column; 5-a gas sensor; 6-a main controller; 7-sealing the valve; 701-connecting arm; 702-a fuel drain valve; 703-oil pipe; 704-tubing mounting holes; 705-fixed slot; 706-tower shaped seal ring; 707-locking nut; 708-a locking bolt; 709-a second inner shoulder; 710-a first inner shoulder edge; 711-outer shoulder edge; 8-ultrasonic degassing device; 81-oil chamber; 82-a stepper motor; 83-a piston; 84-an ultrasonic oscillator; 85-gas outlet pipeline; 86-solenoid valve; 87-gas concentration monitoring means; 88-secondary controller; 89-an exhaust pipeline; 9-an upper computer; 10-a gas source generating mechanism; 11-carrier gas storage means; 12-a carrier gas purification mechanism; 121-moisture filter; 122-a substrate; 123-mesh.
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.
Referring to fig. 1 and 4, the present invention provides a transformer oil chromatography on-line monitoring system based on a vacuum stirrer, comprising: the gas-oil separator 2 is connected with the transformer 1 through an oil pipeline, and a sealing valve 7 is arranged on the oil pipeline; the output end of the oil-gas separator 2 is connected to a chromatographic column 4 through a cold trap 3; one end of the gas sensor 5 is connected with the chromatographic column 4, and the other end is electrically connected with the main controller 6; an ultrasonic degassing device 8 is arranged in the oil-gas separator 2, the ultrasonic degassing device 8 comprises an oil chamber 81, a stepping motor 82, a piston 83 and an ultrasonic oscillator 84, the piston 83 is arranged in the oil chamber 81, one side of the piston 83 is connected with the stepping motor 82, and the ultrasonic oscillator 84 is arranged at the bottom end of the oil chamber 81.
The gas sensor 5 is an integrated sensor, a sensitive element and a control circuit are integrated on a unique ceramic silicon chip, a fault gas chamber to be detected is correspondingly designed, the minimum dead volume is achieved, the detection sensitivity can be greatly improved, compared with FID and TCD sensors, the gas sensor has the advantages of being not afraid of poisoning, long in service life and the like, compared with other non-chromatographic detection methods, the gas sensor is simple in structure, small in size and high in detection sensitivity; the chromatographic column 4 adopts a composite chromatographic column, a composite single column is used for replacing double columns, the system structure is simplified, the composite chromatographic column can effectively separate fault gases such as H2, CO, CH4, C2H6, C2H4, C2H2 and the like under a certain temperature environment, the peak area of each gas is unchanged under different constant temperature conditions, the peak capturing condition of system data processing is not influenced, and the method has the characteristics of high column efficiency, good pollution resistance, long service life and the like.
In another embodiment, the main controller 6 is connected to an upper computer 9 through a communication network, the upper computer 9 implements data processing and analysis, and transmits the analysis data to a database, a display, a spectrogram formulating device and a fault diagnosis system. The analysis data are transmitted to a database for data storage through the upper computer 9, so that the analysis, export, calling and the like of subsequent data are facilitated; the analysis data obtained by the processing and analysis of the upper computer 9 can be visually displayed through the display; the analysis data can be presented in the form of a spectrogram through a spectrogram formulating device; the fault diagnosis system can obtain the cause of the fault of the transformer according to the analysis data and carry out fault diagnosis processing.
In another embodiment, referring to fig. 4, an air outlet pipeline 85 is arranged at the top end of the oil chamber 81, an electromagnetic valve 86 is arranged on the air outlet pipeline 85, one end of the electromagnetic valve 86 is connected with a gas concentration detection device 87, and the other end is connected with an exhaust pipeline 89; the stepping motor 82, the gas concentration detection device 87, and the electromagnetic valve 87 are electrically connected to a sub-controller 88. Firstly, the electromagnetic valve 86 is closed, the stepping motor 82 is controlled to drive the piston 83 to move, the ultrasonic oscillation device 84 is started, the oil chamber 81 is in a closed state at the moment, the movement of the piston 83 increases the vacuum degree in the oil chamber 81, the gas in the transformer oil is subjected to vacuum separation, the gas in the transformer oil can be quickly, uniformly and efficiently separated under the simultaneous action of negative pressure and ultrasound, and the piston 83 stops after the separation is finished; after gas separation is finished, the sub-controller 88 controls the electromagnetic valve 86 to act, the stepping motor 82 drives the piston 83 to move in the reverse direction, gas in the oil chamber 81 passes through the gas outlet pipeline 85 and enters the gas concentration detection device 87 through the electromagnetic valve 86, the gas concentration detection device 87 detects the concentration of the gas, when the gas concentration detection device 87 reaches the upper limit of the gas which can be contained in the gas concentration detection device, a signal is automatically sent to the sub-controller 88, the sub-controller 88 controls the electromagnetic valve 86 to act, conduction of the gas outlet pipeline 85 and the gas exhaust pipeline 89 is realized, and all gas in the oil chamber 81 is exhausted through the gas exhaust pipeline 89.
Referring to the attached figure 2, the ultrasonic degassing device also comprises a carrier gas generating device, wherein the carrier gas generating device comprises a gas source generating mechanism 10, a carrier gas storage mechanism 11 and a carrier gas purifying mechanism 12, the gas source generating mechanism 10 compresses air and then sends the compressed air into the carrier gas storage mechanism 11, and the carrier gas stored in the carrier gas storage mechanism 11 is purified by the carrier gas purifying mechanism and then sent into the ultrasonic degassing device 8. The carrier gas generating device is used for replacing a traditional carrier gas bottle, stable carrier gas is provided for the monitoring system, the accuracy of data of the monitoring system is guaranteed, the carrier gas bottle is prevented from being frequently replaced, and the carrier gas generating device is convenient to use.
Referring to fig. 3, the carrier gas purification mechanism 12 includes a particle filter and a moisture filter 121, and the carrier gas stored in the carrier gas storage mechanism 11 is sent to the ultrasonic degassing device 8 after passing through the particle filter and the moisture filter 121 in sequence. Particulate matter such as impurities, dust and the like in the gas generated by the gas source generating mechanism 10 can be filtered through the particle filter, and moisture carried in the gas can be filtered through the moisture filter 121, so that the accuracy of the data of the monitoring system is ensured. The moisture filter 121 is a polymer membrane moisture filter.
The particle filter comprises a base body 122, a plurality of sieve holes 123 are uniformly distributed on the base body 122, the cross sections of the sieve holes 123 are in a horn shape, and the opening directions of the horns are consistent. The value range of the large holes of the horn openings is 0.8-1.2 microns, the value range of the small holes is 0.1-0.2 microns, meanwhile, the side edges of all the sieve holes 123 are arranged in a step shape, each side edge is divided into at least three layers of steps, and the sizes of the steps are completely the same. The gas is blown onto the substrate 122 from the large holes to the small holes of the trumpet-shaped openings, and impurities, dust and the like which are mixed in the gas can be remained in the trumpet-shaped screen holes 123, so that the particles in the gas are effectively removed. After a period of use, the air source blows back the screen holes 123 (in the direction from the small holes to the large holes), and the impurities remaining in the screen holes 123 are blown out therefrom.
Referring to fig. 5-9, the sealing valve 7 includes a connecting arm 701, an oil drain valve 702 and an oil pipe 703, wherein the connecting arm 701 has a cylindrical main body, a through hole axially penetrating through the main body and forming an inner cavity is formed at the center of the connecting arm 701, a screw is disposed on the outer surface of the upper portion of the connecting arm 701, a screw hole matched with the screw on the outer surface of the upper portion of the connecting arm 701 is disposed on the oil drain valve 702, and the connecting arm 701 is hermetically connected to the top of the connecting arm 701 by; an oil pipe mounting hole 704 is formed in the lower portion of the inner cavity of the connecting arm 701, and an oil pipe 703 is inserted into the oil pipe mounting hole 704. The arrangement of the sealing valve 7 can not only conveniently control the conduction and the cutoff of the transformer and the oil-gas separator 2, but also effectively solve the problem of oil leakage at the joint of the oil drain valve 702 and the oil pipe 703 of the transformer oil chromatography online monitoring system.
The upper end of the connecting arm 701 is recessed downwards to form an annular fixing groove 705, a sealing flat ring is arranged in the fixing groove 705, and the sealing performance of the connecting part of the connecting arm 701 and the oil drain valve 702 is improved due to the arrangement of the sealing flat ring.
In another embodiment, the upper portion of the tubing mounting hole 704 is cylindrical and has a radius larger than the radius of the inner cavity of the connecting arm 701; the lower part is in a circular truncated cone shape and extends to the bottom of the connecting arm 701; a hollow tower-shaped sealing ring 706 is arranged in the oil pipe mounting hole 704, and the tower-shaped sealing ring 706 is in a circular truncated cone shape and is provided with an inner cavity. The arrangement of the hollow tower-shaped sealing ring 706 improves the sealing performance of the joint of the connecting arm 701 and the oil pipe 703.
The sealing valve 7 further comprises a locking nut 707 and a locking bolt 708, the locking nut 707 and the locking bolt 708 are both hollow tubular structures, and the inner wall of the locking nut 707 and the outer wall of the locking bolt 708 are respectively provided with mutually matched threads which are sleeved on the periphery of the lower portion of the connecting arm 701 together. A cap-shaped structure is arranged at the top of the locking nut 707, a through hole is arranged at the center of the cap-shaped structure, and a first inner shoulder 710 is formed at the joint of the inner wall of the locking nut 707 and the lower end of the cap-shaped structure; a cap-shaped structure is arranged at the bottom of the locking bolt 708, a through hole penetrating through the cap-shaped structure is formed in the center of the cap-shaped structure, a second inner shoulder 709 is formed at the joint of the inner wall of the locking bolt 708 and the upper end of the cap-shaped structure, and the second inner shoulder 709 butts against the hollow tower-shaped sealing ring 706; the lower peripheral wall of the connecting arm 701 is formed with an external shoulder 711 projecting outwardly to engage with a first internal shoulder 710 of a locking nut 707 to secure the locking nut 707 to the external shoulder 711 of the connecting arm 701, and the locking bolt 708 is thereby also secured to the lower portion of the connecting arm 701. In the locking process of the locking nut 707 and the locking bolt 708, the tower-shaped sealing ring 706 is pressed, so that the oil pipe is tightly combined with the oil pipe mounting hole 704 of the connecting arm 701, and the oil pipe 703 can be fixed while the oil pipe is sufficiently sealed.
In another embodiment, the outer surface of the middle portion of the connecting arm 701 is in the shape of a regular hexagon prism, which facilitates the fastening of the upper portion of the connecting arm 701 to the drain valve 702 using a special tool.
In another embodiment, the threads on the upper outer surface of the connecting arm 701 are right-handed threads. The threads of the locking bolt 708 are left-handed threads, when the locking nut 707 and the locking bolt 708 are screwed, the rotating direction of the locking nut 707 sleeved on the connecting arm 701 is consistent with the rotating direction of the connecting arm 701, and the upper part of the connecting arm 701 is effectively ensured not to be loosened from the connection with the oil drain valve 702, so that no oil leakage phenomenon is ensured.
The sealing flat ring and the tower-shaped sealing ring 706 are made of polytetrafluoroethylene materials, and the connecting arm 701, the locking nut 707 and the locking bolt 708 are made of medical stainless steel materials.
The invention has simple structure and convenient operation, can separate and detect the gas in the transformer and comprehensively analyze and diagnose the data through the oil-gas separator 2, the cold trap 3, the chromatographic column 4, the gas sensor 5 and the main controller 6 so as to realize the on-line monitoring and analysis of the transformer fault, effectively improve the accuracy of the data of the monitoring system and ensure that the transformer can safely and stably operate; the gas generated in the oil-gas separator 2 can remove oil vapor in the mixed gas through the cold trap 3, so that the oil vapor is prevented from polluting the chromatographic column 4; the ultrasonic degassing device 8 is arranged, so that the dissolved gas of the transformer oil is quickly and effectively separated on the premise of no medium intervention, the degassing efficiency is high, the time is short, the repeatability is good, the pollution to the transformer insulating oil is avoided, and in the oil circulation process, the phenomenon that bubbles are mixed and reinjected into the transformer body is avoided, so that the operation safety of the transformer is ensured; the arrangement of the sealing valve 7 can not only conveniently control the conduction and the cutoff of the transformer and the oil-gas separator 2, but also effectively solve the problem of oil leakage at the joint of the oil drain valve 702 and the oil pipe 703.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a transformer oil chromatogram on-line monitoring system based on vacuum agitator which characterized in that includes: the oil-gas separator is connected with the transformer through an oil pipeline, and a sealing valve is arranged on the oil pipeline; the output end of the oil-gas separator is connected to the chromatographic column through the cold trap; one end of the gas sensor is connected with the chromatographic column, and the other end of the gas sensor is electrically connected with the main controller; the oil-gas separator is internally provided with an ultrasonic degassing device, the ultrasonic degassing device comprises an oil chamber, a stepping motor, a piston and an ultrasonic oscillator, the piston is arranged in the oil chamber, one side of the piston is connected with the stepping motor, and the ultrasonic oscillator is arranged at the bottom end of the oil chamber.
2. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 1, wherein the main controller is connected with an upper computer through a communication network, the upper computer realizes data processing and analysis and transmits the analysis data to a database, a display, a spectrogram formulating device and a fault diagnosis system.
3. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 1, wherein an air outlet pipeline is arranged at the top end of the oil chamber, an electromagnetic valve is arranged on the air outlet pipeline, one end of the electromagnetic valve is connected with a gas concentration detection device, and the other end of the electromagnetic valve is connected with an air outlet pipeline; and the gas concentration detection device and the electromagnetic valve are electrically connected with a secondary controller.
4. The transformer oil chromatography online monitoring system based on the vacuum stirrer according to claim 1 or 3, further comprising a carrier gas generating device, wherein the carrier gas generating device comprises a gas source generating mechanism, a carrier gas storage mechanism and a carrier gas purifying mechanism, the gas source generating mechanism compresses air and then sends the compressed air into the carrier gas storage mechanism, and the carrier gas stored in the carrier gas storage mechanism is purified by the carrier gas purifying mechanism and then sent into the ultrasonic degassing device.
5. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 4, wherein the carrier gas purification mechanism comprises a particle filter and a moisture filter, and the carrier gas stored in the carrier gas storage mechanism is sent to the ultrasonic degassing device after passing through the particle filter and the moisture filter in sequence.
6. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 5, wherein the particle filter comprises a base body, a plurality of sieve holes are uniformly distributed on the base body, the cross sections of the sieve holes are horn-shaped, and the opening directions of the horns are consistent.
7. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 1 or 6, wherein the sealing valve comprises a connecting arm, an oil drain valve and an oil pipe, wherein the main body of the connecting arm is cylindrical, a through hole penetrating along the axial direction is formed in the center of the connecting arm, an inner cavity is formed in the center of the connecting arm, a thread is arranged on the outer surface of the upper portion of the connecting arm, a screw hole matched with the thread on the outer surface of the upper portion of the connecting arm is formed in the oil drain valve, and the connecting arm is connected to the top of the connecting arm in a sealing mode through matching of the thread and the; an oil pipe mounting hole is formed in the lower portion of the inner cavity of the connecting arm, and the oil pipe is inserted into the oil pipe mounting hole.
8. The vacuum stirrer based on transformer oil chromatography online monitoring system as claimed in claim 7, wherein the upper end of the connecting arm is recessed downwards to form a ring-shaped fixing groove, and a sealing flat ring is arranged in the fixing groove.
9. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 8, wherein the upper part of the oil pipe mounting hole is cylindrical, and the radius of the oil pipe mounting hole is larger than that of the inner cavity of the connecting arm; the lower part is in a circular truncated cone shape and extends to the bottom of the connecting arm; and a hollow tower-shaped sealing ring is arranged in the oil pipe mounting hole.
10. The vacuum stirrer-based transformer oil chromatography online monitoring system according to claim 9, wherein the sealing valve further comprises a locking nut and a locking bolt, the inner wall of the locking nut and the outer wall of the locking bolt are respectively provided with mutually matched threads and are jointly sleeved on the periphery of the lower portion of the connecting arm, and the inner wall of the locking bolt forms a second inner shoulder edge which abuts against the hollow tower-shaped sealing ring.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011144A (en) * | 2021-12-01 | 2022-02-08 | 云南电网有限责任公司电力科学研究院 | Insulating oil purification treatment device and method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202453331U (en) * | 2012-03-09 | 2012-09-26 | 贵州省水利水电勘测设计研究院 | Oil color spectrum online monitoring device for oil system of hydropower station and pump station |
| CN104028054A (en) * | 2014-05-29 | 2014-09-10 | 大连世有电力科技有限公司 | Filtering layer of online transformer oil chromatography monitoring system |
| CN104897816A (en) * | 2015-06-18 | 2015-09-09 | 云南电网有限责任公司文山供电局 | Online transformer oil chromatography monitoring system based on vacuum stirrer |
| CN105699150A (en) * | 2016-04-08 | 2016-06-22 | 大连世有电力科技有限公司 | Vacuum ultrasonic degassing device for portable transformer oil photoacoustic spectrum detection device |
| CN106090474A (en) * | 2016-06-07 | 2016-11-09 | 国网天津市电力公司 | Transformer oil chromatographic on-Line Monitor Device fuel outlet valve oil pipe loop seals assembly of devices |
-
2019
- 2019-05-14 CN CN201910396873.1A patent/CN110887919A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202453331U (en) * | 2012-03-09 | 2012-09-26 | 贵州省水利水电勘测设计研究院 | Oil color spectrum online monitoring device for oil system of hydropower station and pump station |
| CN104028054A (en) * | 2014-05-29 | 2014-09-10 | 大连世有电力科技有限公司 | Filtering layer of online transformer oil chromatography monitoring system |
| CN104897816A (en) * | 2015-06-18 | 2015-09-09 | 云南电网有限责任公司文山供电局 | Online transformer oil chromatography monitoring system based on vacuum stirrer |
| CN105699150A (en) * | 2016-04-08 | 2016-06-22 | 大连世有电力科技有限公司 | Vacuum ultrasonic degassing device for portable transformer oil photoacoustic spectrum detection device |
| CN106090474A (en) * | 2016-06-07 | 2016-11-09 | 国网天津市电力公司 | Transformer oil chromatographic on-Line Monitor Device fuel outlet valve oil pipe loop seals assembly of devices |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114011144A (en) * | 2021-12-01 | 2022-02-08 | 云南电网有限责任公司电力科学研究院 | Insulating oil purification treatment device and method |
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