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CN-122000173-A - Intelligent control system and method for synchronous vacuumizing and quantitative oiling of multiple transformers

CN122000173ACN 122000173 ACN122000173 ACN 122000173ACN-122000173-A

Abstract

The invention discloses an intelligent control system and method for synchronous vacuumizing and quantitative oiling of multiple transformers, wherein the intelligent control system comprises a vacuumizing device, at least one oil storage device, a vacuum pipeline, an oiling pipeline and multiple oiling stations, the vacuum pipeline comprises a vacuum main pipe connected with the vacuumizing device and a vacuum branch pipe connected with the vacuum main pipe, the oiling pipeline comprises an oiling main pipe connected with the oil storage device and oiling branch pipes connected with the oiling main pipe, each oiling station is provided with a corresponding vacuum branch pipe and oiling branch pipe, the vacuum main pipe is provided with a blocking valve, the vacuum branch pipe is provided with a vacuum valve and a pressure sensor, the oiling main pipe is provided with a master control valve, the oiling branch pipe is provided with a manual valve, a branch control valve and a flowmeter, the outer wall of the manual valve is provided with a photoelectric switch for sensing the opening and closing state of the manual valve, and when the controller receives a manual valve opening signal detected by the photoelectric switch, a man-machine interaction interface is unlocked to allow vacuumizing and oiling quantitative operation to be executed.

Inventors

  • YE PENG
  • BAO JINDUN
  • MIAO DEBIN
  • REN ZHOUYANG
  • CHEN KUN
  • YE SONGSONG

Assignees

  • 三变科技股份有限公司

Dates

Publication Date
20260508
Application Date
20260313

Claims (10)

  1. 1. The intelligent control system for synchronous vacuumizing quantitative oiling of multiple transformers is characterized by comprising a vacuumizing device (1), at least one oil storage device (2), a vacuum pipeline (3), an oiling pipeline (4) and multiple oiling stations (5), wherein the vacuum pipeline (3) comprises a vacuum main pipe (301) connected with the vacuumizing device (1), a plurality of vacuum branch pipes (302) are connected to the outlet of the vacuum main pipe (301), the oiling pipeline (4) comprises an oiling main pipe (401) connected with the oil storage device (2), a plurality of oiling branch pipes (402) are connected to the outlet of the oiling main pipe (401), a corresponding vacuum branch pipe (302) and an oiling branch pipe (402) are arranged on each oiling station (5), a total control valve (6) is arranged on the oiling main pipe (401), a manual valve (7), a branch control valve (8) and a flowmeter (9) are arranged on the oiling branch pipe (402), a photoelectric switch (10) is arranged on the outer wall of the manual valve (7) and used for sensing the opening and closing state of the manual valve (7), a blocking vacuum main pipe (401) is connected with the oil storage main pipe (2), a vacuum sensor (11) is arranged on the main pipe (1), a vacuum sensor (13) is arranged on the vacuum main pipe (6), and the vacuum main pipe (13) is provided with the total control valve (6) The controller is configured with a man-machine interaction interface, and when the controller receives a manual valve (7) opening signal detected by the photoelectric switch (10), the man-machine interaction interface corresponding to the oiling station (5) is unlocked, so that vacuumizing quantitative oiling operation of the oiling station (5) is allowed to be executed.
  2. 2. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for multiple transformers according to claim 1 is characterized in that the oil filling branch pipe (402) comprises an A branch pipe (4021) connected with an oil filling main pipe (401), a B branch pipe (4022) connected with the A branch pipe (4021), at least one oil filling table (501) for placing the transformers is arranged on the oil filling station (5), the A branch pipe (4021) is arranged corresponding to the oil storage device (1) and the oil filling station (5), the B branch pipe (4022) and the vacuum branch pipe (302) are arranged corresponding to the oil filling table (501), a manual valve (7) is arranged on the A branch pipe (4021), a branch control valve (8) and a flowmeter (9) are arranged on the B branch pipe (4022), and when oil is filled, the transformers are arranged on the oil filling table (501), and oil tanks of the transformers are connected with the corresponding B branch pipes (4022) and the vacuum branch pipes (302).
  3. 3. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for a plurality of transformers according to claim 2 is characterized in that a servo quantitative valve (14) is further arranged on the B branch pipe (4022).
  4. 4. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for multiple transformers according to claim 2 is characterized in that the oil storage device (2) comprises an original oil tank (201), an oil purifying tank (202) and an oil filter (203) arranged between the original oil tank (201) and the oil purifying tank (202), the oil filter (203) is used for processing transformer oil output by the original oil tank (201) and outputting the processed qualified transformer oil into the oil purifying tank (202) for storage, and the oil filling main pipe (401) is connected with an outlet of the oil purifying tank (202).
  5. 5. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for multiple transformers according to claim 4, wherein magnetic flap level gauges (204) are respectively arranged on the crude oil tank (201) and the oil purifying tank (202) and used for monitoring the liquid level in the tank.
  6. 6. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for multiple transformers according to claim 2 is characterized in that a temperature sensor (15) is arranged on the oil filling main pipe (401).
  7. 7. The intelligent control system for synchronously vacuumizing and quantitatively filling oil for multiple transformers according to claim 2, wherein the vacuumizing device (1) comprises a backing pump (101) and a Roots pump (102) which are connected in series, and the Roots pump (102) is connected with a vacuum main pipe (301).
  8. 8. The intelligent control method for synchronously vacuumizing and quantitatively oiling the plurality of transformers is characterized by comprising the following steps of: S1, installing a plurality of transformers to be oiled on an oiling station (5), connecting corresponding oiling branch pipes (402) and vacuum branch pipes (302) to oil tanks of the transformers, and then opening a manual valve (7) on the oiling branch pipes (402); S2, a photoelectric switch (10) sends a signal for opening a manual valve (7) to a controller, the controller unlocks a man-machine interaction interface corresponding to the oiling station (5), and an operator sets the required oil injection amount and the required vacuum degree of each transformer on the man-machine interaction interface; s3, the controller controls the blocking valve (11) and the corresponding vacuum valve (12) to be opened, the vacuumizing device (1) is started to synchronously vacuumize a plurality of transformers, and meanwhile, the pressure sensor (13) detects the vacuum degree in the transformers in real time and sends the vacuum degree to the controller; And S4, when the vacuum degree in a certain transformer is detected to reach a set value, the controller controls the corresponding vacuum valve (12) to be closed, enters a pressure maintaining state and starts timing until the vacuum degree in the transformer is kept stable within the set pressure maintaining time, the controller controls the vacuum valve (12) to be opened again, simultaneously controls the main control valve (6) and the corresponding sub control valve (8) to be opened, quantitatively injects oil into the transformer, closes the sub control valve (8) and the vacuum valve (12) corresponding to the transformer when the oil injection amount reaches the set value, and closes the vacuumizing device (1), the main control valve (6) and the blocking valve (11) until all the sub control valves (8) and the vacuum valve (12) are closed, and breaks vacuum after the pressure maintaining and standing for a period of time, so that the oil injection is completed.
  9. 9. The intelligent control method for synchronously vacuumizing and quantitatively filling oil for a plurality of transformers according to claim 8, wherein in the step S3, the vacuumizing process is divided into a plurality of stages of vacuumizing according to a preset vacuum degree threshold, and a pressure maintaining link is arranged between the stages.
  10. 10. The intelligent control method for synchronously vacuumizing and quantitatively filling oil to a plurality of transformers according to claim 8 is characterized in that the number of the oil storage devices (2) is 3, 25# transformer oil, 45# transformer oil and natural ester oil are respectively filled in the oil storage devices, and in the step S1, corresponding manual valves (7) are opened according to the type of the transformer oil required by the transformers.

Description

Intelligent control system and method for synchronous vacuumizing and quantitative oiling of multiple transformers Technical Field The invention relates to the technical field of transformer production, in particular to an intelligent control system and method for synchronous vacuumizing and quantitative oiling of a plurality of transformers. Background The vacuum oiling is a key procedure in the production and maintenance process of the oil immersed transformer, and has the functions of removing air, moisture and other gases in the transformer oil tank, ensuring no air gap in the transformer, ensuring qualified oil quality and stable insulating property, and having important significance in improving the operation reliability of the transformer and prolonging the service life. The traditional vacuum oiling process adopts a mode of independent operation of a single transformer, namely, only one transformer can be vacuumized and oiled at a time, the working procedure period is long, the production efficiency is low, and the requirement of the pipelining type batch production of the transformers is difficult to meet. In addition, when the mode is adopted for oiling, the oil injection quantity is mostly dependent on manual estimation, liquid level observation or timing control, the quantitative precision is poor, the consistency is difficult to ensure, the problem of insufficient oiling or excessive oiling easily occurs, the automation and the intelligent degree are low, the manual participation degree in links such as vacuum degree monitoring, pressure maintaining and oiling control is high, and human errors are easily introduced, so that the product quality stability is insufficient. In view of this, the applicant has developed a method for vacuum quantitative oiling of transformers (patent number CN202010127460.6, which has been filed with an invention patent), for simultaneously oiling a plurality of transformers, and the whole oiling process is controlled by a controller, reducing the manual operation procedures. However, when the oiling method is adopted for oiling, a plurality of transformers need to share the same vacuum cavity, an independent vacuum control and pressure maintaining structure is lacked, global vacuum failure can be caused when one transformer breaks vacuum, mutual interference among equipment is serious, and the risk of simultaneous reworking of a plurality of products exists. Disclosure of Invention The invention provides an integrated intelligent control system supporting the operation of a plurality of transformers in asynchronous working procedures, which is used for overcoming the problems in the prior art. The intelligent control system for synchronously vacuumizing and quantitatively oiling the transformers can independently set the oiling quantity for each path of oiling branch pipe by arranging the oil storage device and the plurality of oiling branch pipes, synchronously vacuumizing the transformers by arranging the common vacuum source and the plurality of vacuum branch pipes, and independently operating and mutually noninterfering the transformers, thereby realizing asynchronous process operation of vacuumizing part of the transformers, maintaining pressure of part of the transformers and oiling part of the transformers, improving the comprehensive utilization rate of a production line, being suitable for mass production line production, and in addition, the oiling work is controlled by a controller, has high automation degree and low labor cost, is also provided with a manual valve and a photoelectric switch, can realize that the oiling flow can be started by opening the manual valve by combining interface unlocking logic of the controller, and has high oiling safety and reliability. Correspondingly, the invention also provides an intelligent control method for synchronously vacuumizing and quantitatively injecting oil for a plurality of transformers by adopting the intelligent control system. For the system, the technical scheme of the application is as follows: The intelligent control system for synchronously vacuumizing and quantitatively oiling the multiple transformers comprises a vacuumizing device, at least one oil storage device, a vacuum pipeline, an oiling pipeline and multiple oiling stations, wherein the vacuum pipeline comprises a vacuum main pipe connected with the vacuumizing device, the outlet of the vacuum main pipe is connected with multiple vacuum branch pipes, the oiling pipeline comprises an oiling main pipe connected with the oil storage device, the outlet of the oiling main pipe is connected with multiple oiling branch pipes, each oiling station is provided with a corresponding vacuum branch pipe and an oiling branch pipe, the oiling main pipe is provided with a master control valve, each oiling branch pipe is provided with a manual valve, a sub control valve and a flowmeter, the outer wall of each manual valve is provided with a photoelectric switch