CN113588330A - Oil taking method for operating transformer - Google Patents
Oil taking method for operating transformer Download PDFInfo
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- CN113588330A CN113588330A CN202110729037.8A CN202110729037A CN113588330A CN 113588330 A CN113588330 A CN 113588330A CN 202110729037 A CN202110729037 A CN 202110729037A CN 113588330 A CN113588330 A CN 113588330A
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- 238000000605 extraction Methods 0.000 claims abstract description 64
- 230000007246 mechanism Effects 0.000 claims abstract description 42
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- 238000001514 detection method Methods 0.000 claims abstract description 8
- 239000012530 fluid Substances 0.000 claims description 6
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- 238000010586 diagram Methods 0.000 description 9
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/84—Systems specially adapted for particular applications
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- G06T7/0002—Inspection of images, e.g. flaw detection
- G06T7/0004—Industrial image inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/10—Devices for withdrawing samples in the liquid or fluent state
- G01N2001/1031—Sampling from special places
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- G—PHYSICS
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- Housings And Mounting Of Transformers (AREA)
Abstract
The invention relates to an oil extraction method for operating a transformer, which comprises the following steps: the method comprises the following steps of (1) oil taking, namely connecting an oil taking device with an oil taking valve device arranged on a transformer, wherein the oil taking device comprises an oil taking mechanism, and oil liquid in the transformer flows into the oil taking mechanism; the detection step, the oil taking mechanism comprises a camera and an oil storage bottle, the camera is positioned at the bottom end of the oil storage bottle and can rotate relative to the oil storage bottle, the camera is used for collecting gray image data of the oil storage bottle and oil liquid contained in the oil storage bottle, the oil taking step is continued under the condition that the gray image data meet a preset threshold value, the oil taking is completed under the condition that the gray image data do not meet the preset threshold value, and the oil taking device is separated from the oil taking valve device; so set up, realized getting the full automatization of oil, simultaneously, improved the security of getting oil.
Description
Technical Field
The invention relates to the technical field of transformer detection, in particular to an oil taking method for operating a transformer.
Background
At present, a transformer is a substation foundation power facility, and a large transformer operating in a power grid is generally an oil-immersed power transformer. The insulating oil in the transformer is used as a medium for insulating the interior of the transformer on one hand; on the other hand, the heat-dissipating medium is used for transferring heat dissipated by the iron core, the winding and the like of the transformer to the cooling device. Therefore, the insulating oil plays an important role in ensuring the normal and safe operation of the transformer.
During the long-time operation of the transformer, under the comprehensive influence of physical and chemical factors such as illumination, temperature, oxygen, humidity, electric field intensity and the like in the nature, the insulating oil mainly comprising a hydrocarbon chain can be decomposed to generate hydrogen and low molecular hydrocarbon (methane, ethylene, acetylene and ethane) mixed gas, and carbon monoxide and carbon dioxide can be decomposed from fiber insulating solid materials such as paper and the like in the transformer. When the mixed gas meets open fire or the temperature rises instantly to reach the minimum ignition point of the mixed gas, combustion and explosion can occur. In engineering practice, in addition to taking protective measures to prevent the transformer oil in operation from prematurely aging, oil samples are periodically taken for oiling tests to understand the quality and performance of the insulating oil in operation.
When the transformer is sampled, in order not to influence the normal operation of the system, the operation and maintenance personnel can carry out uninterrupted operation, namely, the oil is taken in an electrified manner. Although the design of the transformer considers the use of electrified oil extraction and is provided with the safe oil extraction valve, the capacity of the transformer is greatly improved compared with the past, the gas combustion of the transformer can be quickly caused when light gas acts, so that the danger of oil extraction personnel is caused, and the oil extraction test is one of the important bases for accurately evaluating the internal fault of the transformer at present.
However, when the transformer is operated to take oil and sample by manpower, the transformer gas may be burnt, which causes damage to workers and has low safety.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide the oil taking method for operating the transformer, which has the advantages that the safety of oil taking and sampling can be improved, and meanwhile, the damage to workers is avoided.
The above object of the present invention is achieved by the following technical solutions: an oil extraction method for operating a transformer comprises the following steps:
the method comprises the following steps of (1) oil taking, wherein an oil taking device is connected with an oil taking valve device arranged on a transformer and comprises an oil taking mechanism, and oil in the transformer flows into the oil taking mechanism;
the detection step get oily mechanism still include camera and oil storage bottle, the camera is located the bottom of oil storage bottle, the camera can be relative the oil storage bottle rotates, utilizes the camera is gathered the oil storage bottle and the grey scale image data of the fluid of holding in the oil storage bottle under the circumstances that grey scale image data satisfies predetermined threshold value, continue get oily step grey scale image data does not satisfy under the circumstances of predetermined threshold value, get oily the completion, get oily device with get oily valve gear separation.
Preferably, the method for extracting oil from a transformer according to the present invention further comprises, before the step of extracting oil: and acquiring image data by using the camera, and determining the position of an oil outlet pipe on the oil extraction valve device by identifying the image data by the camera.
Preferably, in the oil extraction method for operating a transformer provided by the present invention, the detecting step specifically includes: the oil extraction mechanism further comprises a laser, the laser is located on one side of the oil storage bottle, a light column extending along the radial direction of the oil storage bottle is obtained through the laser, RGB three-channel image data of the light column are collected through the camera, and gray level image data of the light column are obtained through calculation according to a weighted average method.
Preferably, in the oil extraction method for operating a transformer provided by the present invention, the weighted average method has a calculation formula as follows:
gray＝0.299×R+0.587×G+0.114×B
where gray is the gray pixel value at the desired location and R, G, B is the component pixel values for the three channels at the desired location.
Preferably, in the oil extraction method for operating a transformer provided by the present invention, the predetermined threshold includes a predetermined gray scale value and a predetermined gray scale pixel ratio.
Preferably, in the oil extraction method for operating a transformer, when the predetermined gray scale value is less than 121 and the predetermined gray scale pixel ratio is greater than 60%, the oil extraction device continues to extract oil.
Preferably, the oil extraction method for operating a transformer provided by the present invention specifically includes: the oil taking mechanism further comprises a joint and a connecting pipe, wherein the joint is sleeved at one end of the connecting pipe, and the other end of the connecting pipe is communicated with the oil storage bottle; the joint with get the oil valve device and connect, the connecting pipe with go out oil pipe intercommunication, fluid in the transformer passes through the connecting pipe flows into in the oil storage bottle.
Preferably, after the detecting step, the method for extracting oil from a transformer further includes: and measuring the oil product of the oil liquid contained in the oil storage bottle by using the laser.
Preferably, the method for obtaining oil from a transformer according to the present invention, wherein the measuring the oil content of the oil contained in the oil storage bottle by using the laser includes: and acquiring the gray value of the light column emitted by the laser by using the camera, and identifying the oil in the oil storage bottle through the gray value.
Preferably, according to the oil extraction method for operating the transformer provided by the invention, the oil extraction mechanism further comprises a drain valve, the drain valve is arranged on the outer side wall of the joint and is used for preventing oil in the transformer from leaking in the case that the joint is damaged.
In conclusion, the beneficial technical effects of the invention are as follows: the application provides an oil extraction method for operating a transformer, which comprises the following steps: the method comprises the following steps of (1) oil taking, namely connecting an oil taking device with an oil taking valve device arranged on a transformer, wherein the oil taking device comprises an oil taking mechanism, and oil liquid in the transformer flows into the oil taking mechanism; the detection step, the oil taking mechanism comprises a camera and an oil storage bottle, the camera is positioned at the bottom end of the oil storage bottle and can rotate relative to the oil storage bottle, the camera is used for collecting gray image data of the oil storage bottle and oil liquid contained in the oil storage bottle, the oil taking step is continued under the condition that the gray image data meet a preset threshold value, and the oil taking device is separated from the oil taking valve device under the condition that the gray image data do not meet the preset threshold value; so set up, realized getting the full automatization of oil, simultaneously, improved the security of getting oil.
Drawings
Fig. 1 is a schematic flow chart of an oil extraction method for operating a transformer according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of an overall oil extraction device for operating a transformer according to an embodiment of the present invention.
Fig. 3 is a first schematic structural diagram of an oil extraction mechanism in an oil extraction device for operating a transformer and an oil extraction valve device in the transformer according to an embodiment of the present invention.
Fig. 4 is a second schematic structural diagram of an oil extraction mechanism in an oil extraction device for operating a transformer and an oil extraction valve device in the transformer according to an embodiment of the present invention.
Fig. 5 is a first schematic structural diagram of connection between an oil fetching mechanism in an oil fetching device for operating a transformer and an oil fetching valve device in the transformer according to an embodiment of the present invention.
Fig. 6 is a second schematic structural diagram illustrating a connection between an oil extraction mechanism in an oil extraction device for operating a transformer and an oil extraction valve device in the transformer according to an embodiment of the present invention.
Fig. 7 is a third schematic structural diagram illustrating a connection between an oil extraction mechanism in an oil extraction device for operating a transformer and an oil extraction valve device in the transformer according to an embodiment of the present invention.
Fig. 8 is a first structural schematic diagram (oil is stored in an oil storage tank) of an oil taking mechanism in an oil taking device for operating a transformer and an oil taking valve device in the transformer according to an embodiment of the present invention.
Fig. 9 is a second schematic structural diagram (oil is stored in the oil storage tank) of the oil fetching mechanism in the oil fetching device for operating the transformer and the oil fetching valve device in the transformer according to the embodiment of the present invention.
Fig. 10 is a schematic structural diagram of relative positions of a laser and a camera in an oil extraction device for operating a transformer according to an embodiment of the present invention.
In the figure, 1, an oil extraction device; 10. moving the trolley; 20. a connecting arm; 30. an oil taking mechanism; 301. a joint; 3011. a groove; 302. a connecting pipe; 303. an oil storage bottle; 304. a laser; 3041. a light pillar; 305. a camera; 2. an oil extraction valve device; 21. an oil outlet pipe; 22. a control component; 221. a housing; 2211. mounting holes; 2212. a circular truncated cone hole; 2213. an operating flange; 222. installing a pipe; 2221. a control hole; 2222. a connecting flange; 2223. a stop flange; 223. an operating member; 224. a sphere; 23. a first elastic member; 24. a second elastic member; 25. a threaded nipple; 26. and a seal.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, the oil extraction method for operating a transformer disclosed by the invention comprises the following steps: the method comprises the following steps of (1) oil taking, wherein the oil taking device 1 is connected with an oil taking valve device 2 arranged on a transformer, the oil taking device 1 comprises an oil taking mechanism 30, and oil liquid in the transformer flows into the oil taking mechanism 30; oil in the transformer is deoiled and sampled by the oil taking device 1, so that full-automatic oil taking is realized, and the safety of oil taking is improved.
With reference to fig. 2, in this embodiment, in order to implement full automation, the oil extraction device 1 further includes a moving trolley 10 and a connecting arm 20, the connecting arm 20 is disposed at the top end of the moving trolley 10, one end of the connecting arm 20 is connected to the moving trolley 10, and the other end of the connecting arm 20 is connected to the oil extraction mechanism 30; on one hand, the oil taking mechanism 30 is driven to move to a specified position by the movement of the movable trolley 10; on the other hand, the connecting arm 20 rotates to drive the oil taking mechanism 30 to move to a specified height.
With continued reference to fig. 3 and 4, in the present embodiment, the oil fetching mechanism 30 includes a joint 301, a connecting pipe 302 and a storage bottle 303, one end of the connecting pipe 302 is sleeved with the joint 301, the other end of the connecting pipe 302 is communicated with the storage bottle 303, and the joint 301 is used for connecting with the oil fetching valve device 2.
In order to enable the oil extraction device 1 to automatically determine the position of the oil outlet 21, the oil extraction mechanism 30 further comprises a camera 305, the camera 305 is located at the bottom end of the oil storage bottle 303, the camera 305 can rotate relative to the oil storage bottle 303, in the use process, the camera 305 firstly rotates to point to one side of the transformer along the central axis direction of the joint 301, and when the oil extraction device approaches the transformer, the camera 305 determines the position of the oil outlet pipe 21 on the oil extraction valve device 2 through recognizing image data; through setting up camera 305, realized full-automatic definite oil pipe 21's position, improved the convenience of getting oily device 1.
Wherein, the periphery wall of the joint 301 is provided with a groove 3011 matched with the oil valve device 2, a preset angle is clamped between the inner side wall of the groove 3011 and the horizontal plane, that is to say, the inner wall of the groove 3011 is an inclined plane.
The oil taking valve device 2 is arranged on the transformer, and the oil taking valve device 2 is used for controlling the outflow of oil in the transformer. Get oil valve device 2 and include oil pipe 21, control assembly 22, first elastic component 23, second elastic component 24, thread nipple 25 and sealing member 26, control assembly 22 encloses and establishes into the holding passageway, oil pipe 21 inserts and locates in the holding passageway, oil pipe 21 can slide along the extending direction of holding passageway, the one end of first elastic component 23 and the first end butt of oil pipe 21, when joint 301 is connected with oil pipe 21, first elastic component 23 is in compression state, at this moment, first elastic component 23 provides the restoring force for oil pipe 21. In order to avoid leakage of oil in the transformer through the oil outlet pipe 21, the first end of the oil outlet pipe 21 is sealed, an oil outlet hole is formed in the peripheral wall close to the second end of the oil outlet pipe 21, when the joint 301 is connected with the oil outlet pipe 21, the connecting pipe 302 is communicated with the oil outlet pipe 21, at the moment, the oil outlet hole is located in the threaded nipple 25, the first elastic part 23 is in a compressed state, and the oil in the transformer flows into the oil outlet pipe 21 through the oil outlet hole, then flows into the connecting pipe 302 through the oil outlet pipe 21, and then flows into the oil storage bottle 303 through the connecting pipe 302; when the joint 301 is separated from the oil outlet pipe 21, the first elastic piece 23 provides restoring force for the oil outlet pipe 21, and at the moment, the oil outlet hole is positioned outside the threaded nipple 25, so that oil leakage in the transformer is avoided.
In the orientation shown in fig. 3, the first end of the oil outlet pipe 21 is the right end, and the second end of the oil outlet pipe 21 is the left end.
Specifically, the control assembly 22 includes a housing 221, a mounting tube 222, an operating element 223, and at least one sphere 224, where the housing 221 encloses a rotating channel, the housing 221 is disposed on an outer peripheral wall of the mounting tube 222, and the housing 221 can slide along a central axis direction of the mounting tube 222. Taking the orientation shown in fig. 3 as an example, the right end of the casing 221 is provided with a mounting hole 2211 extending along the central axis direction of the casing 221, the mounting hole 2211 is communicated with the rotary passage, the central axis of the mounting hole 2211 and the central axis of the rotary passage are arranged in a collinear manner, and the diameter of the mounting hole 2211 is larger than that of the rotary passage.
The left end of the shell 221 is provided with a circular truncated cone hole 2212 matched with the joint 301, the circular truncated cone hole 2212 extends along the central axis direction of the rotating channel, the circular truncated cone hole 2212 is communicated with the rotating channel, the small-diameter end of the circular truncated cone hole 2212 is connected with one end, deviating from the mounting hole 2211, of the rotating channel, and the diameter of the large-diameter end of the circular truncated cone hole 2212 is larger than that of the rotating channel.
To facilitate the pushing of the housing 221 to slide along the mounting tube 222, the left end of the housing 221 is provided with an operation flange 2213 extending outward in the radial direction of the rotation passage, the operation member 223 is located at the left side of the operation flange 2213, and the operation member 223 is used for driving the housing 221 to slide along the mounting tube 222.
Wherein, the outer peripheral wall of the mounting tube 222 is provided with a control hole 2221 extending along the radial direction of the mounting tube 222, the control hole 2221 penetrates through the outer peripheral wall of the mounting tube 222, the sphere 224 is inserted into the control hole 2221, the sphere 224 can slide along the central axis direction of the control hole 2221, and in an initial state, the outer wall of the sphere 224 abuts against the inner wall of the rotary channel.
Specifically, the inside connecting flange 2222 that is provided with along the radial inside extension of installation pipe 222, the internal thread with screw nipple looks adaptation is seted up towards the inside of the one end of transformer to installation pipe 222, the one end and the installation pipe 222 threaded connection of screw nipple 25, the other end and the oil tank intercommunication in the transformer of screw nipple 25. A seal 26 is provided between the side of the connection flange 2222 facing the transformer and the nipple 25, by means of which seal 26 the oil in the tank of the transformer is prevented from flowing out through the nipple 25.
Wherein, set up the slide opening that extends along the axis direction of rotatory passageway in the nipple joint 25, the slide opening runs through nipple joint 25, and nipple joint 25 is provided with the radial flange that inwards extends along the slide opening towards the one end of transformer, and first elastic component 23 is inserted and is established in the slide opening, the one end and the flange butt of first elastic component 23, the other end of first elastic component 23 and the first end butt of play oil pipe 21.
In the initial state, taking the orientation shown in fig. 3 as an example, the first end of the oil outlet pipe 21 is inserted into the nipple 25, the second end of the oil outlet pipe 21 is positioned on the left side of the sealing element 26, at this time, the oil outlet hole is positioned on the left side of the sealing element 26, and the oil outlet pipe 21 can slide along the sliding hole; the oil outlet hole is arranged on the left side of the sealing element 26, so that oil in the threaded nipple 25 is prevented from flowing into the oil outlet pipe through the oil outlet hole, and leakage is avoided. In the using process, the joint 301 is connected with the oil outlet pipe 21, the oil outlet pipe 21 is driven to slide along the sliding hole, the connecting pipe 302 is communicated with the oil outlet pipe 21, at the moment, the oil outlet hole is communicated with the sliding hole, namely, the oil outlet hole is positioned on the right side of the sealing element 26, the first elastic element 23 is in a compression state, oil in the sliding hole flows into the oil outlet pipe 21 through the oil outlet hole, and then flows into the oil storage bottle 303 through the connecting pipe 302; when the joint 301 is separated from the oil line 21, the first elastic member 23 provides restoring force to the oil line 21, and the oil line 21 slides along the slide hole, which is located on the left side of the sealing member 26, that is, outside the slide hole.
Wherein, the second elastic component 24 is sleeved on the peripheral wall of the threaded nipple 25, one end of the second elastic component 24 abuts against one end of the mounting hole 2211 facing the rotation channel, and the other end of the second elastic component 24 abuts against a stopping portion arranged on the threaded nipple 25.
Taking the orientation shown in fig. 3 as an example, in order to avoid the housing 221 from sliding off the mounting tube 222, the left end of the mounting tube 222 is provided with a stop flange 2223 extending outward in the radial direction of the mounting tube 222, and in the initial state, the operation flange 2213 abuts against the stop flange 2223.
With continued reference to fig. 3 to 6, the process of connecting the oil fetching mechanism 30 with the oil fetching valve device 2 includes the steps of:
s101, one end of the operating element 223 abuts against the operating flange 2213, and the operating element 223 pushes the housing 221 to slide along the extending direction of the mounting pipe 222 until the large diameter end of the circular table hole 2212 corresponds to the control hole 2221, and the sliding of the housing 221 is stopped.
Specifically, taking the orientation shown in fig. 3 as an example, the second elastic member 24 is compressed when the housing 221 slides rightward along the mounting tube 222.
S102, the oil taking mechanism 30 moves along the central axis direction of the rotating channel, the joint 301 is inserted into the mounting pipe 222, the joint 301 pushes the ball 224 to slide outwards along the central axis direction of the control hole 2221 until the groove 3011 in the joint 301 corresponds to the control hole 2221, the joint 301 is connected with the oil outlet pipe 21, the connecting pipe 302 is communicated with the oil outlet pipe 21, and the oil outlet hole is communicated with the sliding hole.
Wherein, the joint 301 pushes the oil outlet pipe 21 to slide along the central axis direction of the slide hole, at this time, the oil outlet hole is communicated with the slide hole, and the first elastic element 23 is in a compressed state.
S103, the operating element 223 moves along the central axis direction of the mounting tube 222, the operating element 223 is separated from the operating flange 2213, the second elastic element 24 provides a restoring force for the housing 221, the housing 221 slides along the mounting tube 222 under the action of the second elastic element 24, the housing 221 pushes the ball 224 to slide inwards along the central axis direction of the control hole 2221 until the ball 224 is partially accommodated in the groove 3011, the housing 221 slides to the initial position, and the joint 301 is locked with the oil extraction valve device 2.
Specifically, the circular truncated cone hole 2212 is provided with an inclined portion, the inclined portion is arranged between the large-diameter end and the small-diameter end, the ball 224 is slowly pushed into the groove 3011 under the action of the inclined portion, and then the joint 301 and the oil extraction valve device 2 are locked.
With continued reference to fig. 6, after the joint 301 is locked with the oil extraction valve device 2, the oil in the transformer flows into the oil outlet pipe 21 through the nipple 25, and then flows into the oil storage bottle 303 through the connecting pipe 302.
A detection step of acquiring grayscale image data of the oil storage bottle 303 and oil contained in the oil storage bottle 303 by using a camera 305, continuing the oil extraction step when the grayscale image data meets a predetermined threshold, and completing oil extraction when the grayscale image data does not meet the predetermined threshold, wherein the oil extraction device 1 is separated from the oil extraction valve device 2; through setting up camera 305, realized getting oily device 1 automated inspection, avoided artifical the participation, from this, improved the security and the automation of getting oil.
Specifically, the camera 305 rotates, when the camera 305 is directly facing the oil storage bottle 303, the camera 305 takes a picture of the oil contained in the oil storage bottle 303 and the oil storage bottle 303, and the gray image data acquired by the camera 305 is compared with a predetermined threshold value to determine whether to continue to take oil.
Wherein the predetermined threshold comprises a predetermined gray scale value and a predetermined gray scale pixel fraction.
Specifically, when the predetermined grayscale value is less than 121 and the predetermined grayscale pixel ratio is greater than 60%, the oil extraction device 1 continues to extract oil. When the predetermined gray scale value is equal to or greater than 121 and the predetermined gray scale pixel ratio is equal to or less than 60%, the oil extraction is completed, and the oil extraction device 1 is separated from the oil extraction valve device 2.
With continued reference to fig. 7 to 9, the process of detaching the oil fetching mechanism 30 from the oil fetching valve device 2 includes the following steps:
s201, one end of the operating element 223 abuts against the operating flange 2213, the operating element 223 pushes the housing 221 to slide along the extending direction of the mounting pipe 222 until the large diameter end of the circular platform hole 2212 corresponds to the control hole 2221, the sliding of the housing 221 is stopped, and the second elastic element 24 is compressed.
S202, the oil extraction mechanism 30 moves away from the oil outlet pipe 21 along the central axis of the rotation passage, the joint 301 pushes the ball 224 to slide outward along the central axis of the control hole 2221, and the joint 301 is separated from the oil extraction valve device 2.
Specifically, taking the orientation shown in fig. 7 as an example, the joint 301 pushes the ball 224 to slide outward along the central axis direction of the control hole 2221, the ball 224 is partially accommodated in the circular truncated cone hole 2212, the first elastic piece 23 provides restoring force for the oil outlet pipe 21, and under the action of the first elastic piece 23, the oil outlet pipe 21 slides leftward along the central axis direction of the sliding hole until the oil outlet hole is located outside the sliding hole.
S203, the operating member 223 moves along the central axis direction of the mounting tube 222, the operating member 223 is separated from the operating flange 2213, the second elastic member 24 provides a restoring force for the housing 221, the housing 221 slides along the mounting tube 222 under the action of the second elastic member 24, the housing 221 pushes the ball 224 to slide inward along the central axis direction of the control hole 2221, and the housing 221 slides to the initial position.
With continued reference to fig. 2 to 10, in this embodiment, the detecting step specifically includes: the oil extraction mechanism 30 further includes a laser 304, the laser 304 is located on one side of the oil storage bottle 303, the laser 304 is used for emitting a light beam 3041 extending along the radial direction of the oil storage bottle 303, the camera 305 collects RGB three-channel image data of the light beam 3041, and gray scale image data of the light beam 3041 is obtained through calculation according to a weighted average method.
Illustratively, the camera 305 may be a CCD camera, although the camera 305 may be of other types. In an implementation manner in which the camera 305 adopts a CCD camera, RGB three-channel image data of the light beam 3041 is collected, and gray-scale image data of the light beam 3041 is calculated according to a weighted average method.
Wherein, the weighted average method has the calculation formula as follows: gray is 0.299 × R +0.587 × G +0.114 × B
Where gray is the gray pixel value at the desired location and R, G, B is the component pixel values for the three channels at the desired location.
Further, in this embodiment, before the oil extracting step, the method further includes: image data is acquired by the camera 305, and the camera 305 determines the position of the flowline 21 on the fuel delivery valve assembly 2 by recognizing the image data.
Illustratively, the camera 305 may be a 3D camera, and of course, the camera 305 may also be a CCD camera. In an implementation manner in which the camera 305 is a 3D camera, the 3D camera is used to collect a color image, the 3D camera recognizes the oil outlet pipe 21 on the oil valve device 2 according to shape matching after performing a graying process on the color image, and meanwhile, the 3D camera recognizes the operation element 223 according to shape matching after performing a graying process on the color image.
The 3D camera identifies the pixel position of the oil outlet pipe 21 in the color image, the color image of the oil extraction valve device 2 is mapped to the whole image of the transformer, the position of the oil extraction valve device 2 in the 3D camera coordinate system is calculated, and the coordinates of the oil extraction valve device 2 are converted into the coordinate system of the oil extraction device 1 through the space coordinate system to complete the positioning of the oil outlet pipe 21.
Further, after the detecting step, the method further comprises: the oil of the oil contained in the oil tank 303 is measured by the laser 304.
In order to ensure the quality of the oil in the oil storage bottle 303, the oil content of the oil in the oil storage bottle 303 needs to be measured.
Wherein, utilize laser 304 to measure the oil of the fluid of holding in storage bottle 303, specifically include: the camera 305 is used to collect the image of the light beam 3041 emitted from the laser 304, and the oil in the oil storage bottle 303 is judged by performing graying processing on the image and then passing through a preset grayscale threshold.
Specifically, after the oil in the transformer flows into the oil storage bottle 303, a large amount of bubbles and a part of impurities in the connecting pipe 302 are stored in the oil storage bottle 303, a laser 304 emits a light beam 3041 extending along the radial direction of the oil storage bottle 303, an image of the light beam 3041 is collected by the camera 305, and the states of the bubbles and the impurities in the oil storage bottle 303 are judged by graying the image and passing through a preset grayscale threshold.
The original light beam 3041 collected by the camera 305 is an RGB three-channel image, and the RGB three-channel image data needs to be converted into a single-channel form.
The way to obtain the single channel form is: and calculating to obtain a gray image by adopting a weighted average method according to different sensitivity degrees of the red, the green and the blue. Graying treatment: gray is 0.299 × R +0.587 × G +0.114 × B, where gray is the gray pixel value at the desired position, and its variable R, G, B is the component pixel values of the three channels at the desired position.
In this embodiment, when there are many bubbles and impurities in the oil storage bottle 303, the light column 3041 will have obvious speckle refraction, and the gray value of the pixel points corresponding to the image background of the light column 3041 is obviously high. Through measurement, when the gray value of the number of pixel points corresponding to the image background of the light pillar 3041 is reduced to a predetermined threshold value, the oil level of the oil in the oil storage bottle 303 reaches a predetermined value.
In order to avoid the occurrence of a reflection bright point on the outer wall of the oil storage bottle 303, the area of the light beam 3041 of the image shot by the camera 305 is selected for screenshot analysis, but the sizes of multiple screenshots are slightly different, so that the preset gray pixel proportion is used for representing, and the pixels of the scattered light beam 3041 emitted by the laser 304 are obviously concentrated and the bright point is reduced along with the reduction of impurities. When the gray value of part of the bright points is less than 121 and the gray pixel ratio in the screenshot is more than 60% of the whole image of the transformer, the oil product initial measurement of the oil liquid in the oil storage bottle 303 meets the sampling requirement, and therefore the accuracy of online oil product monitoring is improved.
The method of acquiring the gray image of the light column 3041 emitted from the laser 304 by using the camera 305 may also be used for calibrating the oil volume of the oil in the oil storage bottle 303 before the chromatographic detection.
In another embodiment, the oil taking mechanism 30 further comprises a drain valve disposed on an outer sidewall of the joint 301, the drain valve being used for preventing oil in the transformer from leaking in case of damage to the joint 301; and the safety of oil taking is further improved by arranging the drain valve.
The oil extraction method for operating the transformer provided by the embodiment comprises the following steps: the method comprises the following steps of (1) oil taking, wherein the oil taking device 1 is connected with an oil taking valve device 2 arranged on a transformer, the oil taking device 1 comprises an oil taking mechanism 30, and oil liquid in the transformer flows into the oil taking mechanism 30; the detection step and the oil taking mechanism 30 comprise a camera 305 and an oil storage bottle 303, wherein the camera 305 is positioned at the bottom end of the oil storage bottle 303, the camera 305 can rotate relative to the oil storage bottle 303, the camera 305 is used for collecting gray image data of the oil storage bottle 303 and oil contained in the oil storage bottle 303, the oil taking step is continued when the gray image data meet a preset threshold value, and the oil taking device 1 is separated from the oil taking valve device 2 when the gray image data do not meet the preset threshold value; so set up, realized getting the full automatization of oil, simultaneously, improved the security of getting oil.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
Finally, it should be noted that: it should be understood that the above examples are only for clearly illustrating the present invention and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications of the invention may be made without departing from the scope of the invention.
Claims (10)
1. An oil extraction method for operating a transformer is characterized in that: the method comprises the following steps:
the method comprises the following steps of (1) oil taking, wherein an oil taking device is connected with an oil taking valve device arranged on a transformer and comprises an oil taking mechanism, and oil in the transformer flows into the oil taking mechanism;
the detection step get oily mechanism and include camera and oil storage bottle, the camera is located the bottom of oil storage bottle, the camera can be relative the oil storage bottle rotates, utilizes the camera is gathered the oil storage bottle and the grey scale image data of the fluid of holding in the oil storage bottle under the circumstances that grey scale image data satisfies predetermined threshold value, continue get oily step grey scale image data does not satisfy under the circumstances of predetermined threshold value, get oily completion, get oily device with get oily valve gear separation.
2. The method of claim 1 for extracting oil from an operating transformer, wherein: before the oil extraction step, the method further comprises the following steps:
and acquiring image data by using the camera, and determining the position of an oil outlet pipe on the oil extraction valve device by identifying the image data by the camera.
3. The method of claim 2, wherein the step of operating the transformer comprises: the detecting step specifically includes:
the oil extraction mechanism further comprises a laser, the laser is located on one side of the oil storage bottle, a light column extending along the radial direction of the oil storage bottle is emitted by the laser, RGB three-channel image data of the light column are collected by the camera, and gray level image data of the light column are obtained through calculation according to a weighted average method.
4. The method of claim 3, wherein the step of operating the transformer comprises: the weighted average method has the calculation formula as follows:
gray＝0.299×R+0.587×G+0.114×B
where gray is the gray pixel value at the desired location and R, G, B is the component pixel values for the three channels at the desired location.
5. The method of claim 1 for extracting oil from an operating transformer, wherein: the predetermined threshold includes a predetermined grayscale value and a predetermined grayscale pixel fraction.
6. The method of claim 5, wherein the step of operating the transformer comprises: and when the preset gray value is less than 121 and the preset gray pixel ratio is more than 60%, the oil taking device continues to take oil.
7. The method of claim 3, wherein the step of operating the transformer comprises: the oil taking step specifically comprises:
the oil taking mechanism further comprises a joint and a connecting pipe, one end of the connecting pipe is sleeved with the joint, and the other end of the connecting pipe is communicated with the oil storage bottle;
the joint with get the oil valve device and connect, the connecting pipe with go out oil pipe intercommunication, fluid in the transformer passes through the connecting pipe flows into in the oil storage bottle.
8. The method of claim 3, wherein the step of operating the transformer comprises: after the detecting step, further comprising:
and measuring the oil product of the oil liquid contained in the oil storage bottle by using the laser.
9. The method of claim 8, wherein the step of operating the transformer comprises: utilize the laser instrument is to the holding be in the oil product of the fluid in the oil storage bottle measures, specifically includes:
and acquiring the gray value of the light column emitted by the laser by using the camera, and identifying the oil in the oil storage bottle through the gray value.
10. The method of claim 6, wherein: the oil taking mechanism further comprises a drain valve, the drain valve is arranged on the outer side wall of the joint and is used for preventing oil in the transformer from leaking under the condition that the joint is damaged.
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