CN112649547A - Automatic standard oil sample storage device, oil chromatography on-line monitoring system and using method thereof - Google Patents
Automatic standard oil sample storage device, oil chromatography on-line monitoring system and using method thereof Download PDFInfo
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- CN112649547A CN112649547A CN202110038389.9A CN202110038389A CN112649547A CN 112649547 A CN112649547 A CN 112649547A CN 202110038389 A CN202110038389 A CN 202110038389A CN 112649547 A CN112649547 A CN 112649547A
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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
- G01N30/02—Column chromatography
- G01N30/04—Preparation or injection of sample to be analysed
- G01N30/16—Injection
- G01N30/20—Injection using a sampling valve
Abstract
The invention discloses a standard oil sample automatic storage, an oil chromatogram on-line monitoring system and a using method thereof, wherein the standard oil sample automatic storage comprises: a cylinder having a predetermined volume, the cylinder having opposed top and bottom ends; the piston is movably arranged in the cylinder body and comprises a plug body which divides the cylinder body into an insulating oil cavity and an air cavity, and a pipe body communicated with the insulating oil cavity; the air supply mechanism is communicated with the air cavity and comprises a compressed air pump, and the piston can move after the compressed air pump is started; the stirring piece is arranged in the insulating oil cavity and close to the bottom end side; the magnetic stirring disk is arranged outside the insulating oil cavity and below the stirring piece, and the stirring motor is used for driving the magnetic stirring disk to rotate in a non-contact mode. The invention can reduce the standing and mixing time and improve the working effect of field inspection.
Description
Technical Field
The invention relates to the technical field of transformer oil chromatogram on-line monitoring, in particular to a standard oil sample automatic storage, an oil chromatogram on-line monitoring system and a using method thereof.
Background
In most transformers, insulating oil and insulating paper are the main insulating materials, and under the action of overheating and discharging, aging and decomposition phenomena occur, and low molecular hydrocarbon gas is generated. The acetylene gases are inseparably related to the failure of the transformer in both composition and content. In the operation process of the transformer, the generated different gas contents are monitored in real time, so that faults existing in the transformer can be solved in time, and the stability and the reliability of the operation of the transformer are improved.
At present, an important means for diagnosing internal faults of oil-immersed power equipment such as a transformer is analysis of dissolved gas in transformer oil. The transformer oil chromatographic on-line monitoring device is a precision device integrating control, measurement and analysis technologies, carries out on-line monitoring on oil-immersed power equipment such as a transformer and the like, and timely and accurately detects the concentration and the variation trend of various fault characteristic gases dissolved in insulating oil on line, wherein the gases comprise hydrogen, carbon monoxide, methane, ethane, ethylene, acetylene and the like. The oil chromatogram on-line detection device can quickly and accurately perform oil chromatogram analysis, realize complete on-line detection of the operation information of the oil-immersed power equipment, and effectively perform early warning on latent faults of the transformer, thereby providing reliable guarantee for long-term stable operation of the oil-immersed power equipment such as the transformer.
However, with the increase of the service life of the oil chromatography on-line monitoring device, a series of problems such as insufficient degassing amount, reduced chromatographic column separation efficiency, reduced detector performance and the like caused by component aging exist, so that the deviation between the detection result and the true value is large, and the actual condition of the operation of the transformer cannot be accurately judged. Therefore, the oil chromatogram on-line monitoring device of the alternating current and direct current extra-high voltage station needs to be periodically checked.
When the existing oil chromatography on-line monitoring device is used for on-site verification, a standard oil tank is usually required to be kept stand for one day after oil distribution is finished, and after dissolved gas in insulating oil is fully mixed in a storage device, on-site verification can be carried out, so that the working efficiency of on-site verification is reduced.
Disclosure of Invention
In order to overcome at least one defect in the prior art, the invention provides a standard oil sample automatic storage device, an oil chromatography online monitoring system and a using method thereof, which can reduce standing and mixing time and improve the working effect of field inspection.
The above object of the present invention can be achieved by the following technical solutions:
a standard oil sample automatic storage comprising:
a cylinder having a predetermined volume, the cylinder having opposing top and bottom ends;
the piston is movably arranged in the cylinder body and comprises a plug body which divides the cylinder body into an insulating oil cavity and an air cavity, and a pipe body communicated with the insulating oil cavity;
the air supply mechanism is communicated with the air cavity and comprises a compressed air pump, and the piston can move after the compressed air pump is started;
the stirring piece is arranged in the insulating oil cavity and close to the bottom end side;
the magnetic stirring disc is arranged outside the insulating oil cavity and below the stirring piece, and the stirring motor is used for driving the magnetic stirring disc to rotate in a non-contact mode.
In a preferred embodiment, the cylinder body is being close to the position on top be provided with the second opening that the air chamber is linked together, air feed mechanism sets up the second opening part, air feed mechanism still includes admission valve, connecting valve and manometer, compressed air pump, admission valve, connecting valve and manometer arrange along the pipeline in proper order.
In a preferred embodiment, the automatic standard oil sample storage further includes an exhaust valve provided on a line between the intake valve and the connection valve.
In a preferred embodiment, the bottom end of the cylinder is formed with a recess, and the stirring member is located in the recess.
In a preferred embodiment, the stirring motor is a motor with changeable polarity, and the magnetism of the magnetic stirring disk can be changed to change the rotation direction of the stirring piece.
In a preferred embodiment, the stirring motor is started and gradually increased from 0 to a rated rotating speed, and when the stirring motor is at the rated rotating speed, the rotating speed of the stirring piece is 200 rpm.
In a preferred embodiment, the tube body is a hollow structure and has a first end and a second end which are opposite, the first end is fixed on the plug body, and the second end passes through the mounting hole at the top end of the cylinder body; an oil storage valve is arranged close to the second end.
An oil chromatography on-line monitoring system, comprising: as above standard oil appearance automatic memory and with oil chromatogram on-line monitoring device and the waste oil bucket of standard oil appearance automatic memory intercommunication, oil chromatogram on-line monitoring device has relative entry end and exit end, the entry end is connected to the oil outlet valve that sets up on the cylinder body, the exit end is connected to the waste oil bucket.
A use method of the oil chromatography on-line monitoring system comprises the following steps:
before checking, turning on a stirring motor, and driving a stirring piece to rotate until the oil sample is uniformly stirred; will be mixed with
During inspection, a compressed air pump, an air inlet valve and a connecting valve are started, an outlet of an oil outlet valve is connected with an inlet pipe of an oil chromatography online monitoring device, an outlet pipe of the oil chromatography online monitoring device discharges the oil to a waste oil tank, and then calibration is carried out;
after the calibration is finished, the stirring motor is closed, the compressed air pump, the air inlet valve and the connecting valve are opened, the outlet of the oil outlet valve is connected with the oil-resistant pipe and discharged to the waste oil tank, and the compressed air pump, the air inlet valve and the connecting valve are sequentially closed after the pipe body is lowered to the lowest position at a certain speed;
before the standard oil sample automatic storage device stores oil again, the exhaust valve rear pipeline is butted with the oil outlet valve rear pipeline, the compressed air pump, the air inlet valve, the exhaust valve and the oil storage valve are opened, the piston rod is lifted under the action of air pressure, and after the pipe body slowly rises to the highest position, the oil storage valve, the exhaust valve, the air inlet valve and the compressed air pump are closed in sequence;
when oil is stored, the lower oil outlet valve is connected with an outlet of an oil distribution device, the exhaust valve at the top is connected with an oil-resistant pipe and discharged to a waste oil barrel, the lower oil outlet valve and the top exhaust valve are opened to start oil feeding, the stirring motor is simultaneously opened, and the top exhaust valve and the lower oil outlet valve are sequentially closed after the top exhaust pipe discharges oil;
and after the insulating oil is transferred, opening the compressed air pump, the air inlet valve and the connecting valve to increase the pressure of the air cavity.
In a preferred embodiment, when the stirring motor is started, the stirring motor is gradually increased from 0 to a rated rotating speed, and when the stirring motor is at the rated rotating speed, the rated rotating speed of the stirring piece is 200 rpm; and after the rotating shaft rotates for a preset time at the rated rotating speed, the rotating shaft is reversed, and the rotating direction is periodically changed.
According to the standard oil sample automatic storage device provided by the embodiment of the application, the stirring piece is arranged in the insulating oil cavity in the standard oil sample automatic storage device and close to the bottom end side; just be located outside the insulating oil pocket stirring piece below sets up the magnetic stirring dish to and set up and be used for contactless drive magnetic stirring dish pivoted agitator motor, during the use, opens agitator motor, can drive the stirring piece through the coupling of magnetic stirring dish and stir, can realize gaseous flash mixed even in the insulating oil, reduce the mixing time that stews of traditional accumulator, improve work efficiency. This design benefit through contactless mode, can realize contactless stirring with the stirring piece that outside power transmission gives inside. Further, in the stirring process, the rotating speed and the polarity of the stirring motor can be reasonably controlled to efficiently and quickly realize the quick uniform mixing of the gas in the insulating oil.
Specific embodiments of the present invention are disclosed in detail with reference to the following description and drawings, indicating the manner in which the principles of the invention may be employed. It should be understood that the embodiments of the invention are not so limited in scope. The embodiments of the invention include many variations, modifications and equivalents within the spirit and scope of the appended claims. Features that are described and/or illustrated with respect to one embodiment may be used in the same way or in a similar way in one or more other embodiments, in combination with or instead of the features of the other embodiments.
Drawings
The invention is further described with reference to the following figures and embodiments.
Fig. 1 is a schematic structural diagram of a standard oil sample automatic storage provided in an embodiment of the present application;
FIG. 2 is a schematic structural diagram of an on-line oil chromatography monitoring system provided in an embodiment of the present application;
fig. 3 is a schematic diagram of a standard oil sample automatic storage provided in an embodiment of the present application in an oil storage state.
Reference numerals of the above figures:
1. a cylinder body; 11. an insulating oil chamber; 12. an air chamber; 110. a first opening; 120. a second opening; 13. an oil outlet valve; 14. an oil storage valve; 2. a piston; 21. a plug body; 22. a pipe body; 220. scale lines; 21. a compressed air pump; 22. an intake valve; 23. an exhaust valve; 24. a connecting valve; 25. a pressure gauge; 15. a stirring member; 16. a groove; 31. a magnetic stir plate; 30. a stirring motor; 3. an oil chromatography on-line monitoring device; 4. a waste oil tank; 5. an oil return line; 6. oil resistant pipe.
Detailed Description
The technical solutions of the present invention will be described in detail with reference to the accompanying drawings and specific embodiments, it should be understood that these embodiments are merely illustrative of the present invention and are not intended to limit the scope of the present invention, and various equivalent modifications of the present invention by those skilled in the art after reading the present invention fall within the scope of the appended claims.
It will be understood that when an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
The application provides a standard oil appearance automatic storage ware adopts this standard oil appearance automatic storage ware, and after the oil was joined in marriage on the scene and transferred to standard oil appearance automatic storage ware, through the stirring of stirring, the rapid mixing who can realize gas in the insulating oil is even, reduces the mixing time that stews of traditional accumulator, improves work efficiency.
Referring to fig. 1, an embodiment of the present disclosure provides an automatic standard oil sample storage device, which mainly includes: cylinder 1, piston 2, air feed mechanism, stirring piece 15, magnetism agitator disk 31, agitator motor 30 etc..
In the present embodiment, the cylinder 1 may be a hollow stainless steel can. For example, the cylinder body 1 may be a cylindrical sealing cylinder. Of course, the specific shape of the cylinder 1 may be other regular or irregular shapes, and the application is not limited in this respect.
The piston 2 is movably arranged in the cylinder 1. The cylinder 1 has opposite top and bottom ends. The piston 2 may include a plug body 21 dividing the cylinder block 1 into an insulating oil chamber 11 and an air chamber 12, and a tube body 22 communicating with the insulating oil chamber 11. Wherein the plug body 21 divides the cylinder 1 into an insulating oil chamber 11 and an air chamber 12. The insulating oil chamber 11 is filled with insulating oil. Specifically, the volume of the insulating oil chamber 11 is 0-10 liters. When the plug body 21 is at the highest position, the volume of the insulating oil chamber 11 is 10L, and when the plug body 21 is at the lowest position, the volume of the insulating oil chamber 11 is 0L. When the plug body 21 is at the highest position, the plug body can be attached to the inner wall of the upper end of the cylinder body 1; when the stopper body 21 is at the lowest position, it can be abutted against the lower end inner wall of the cylinder body 1.
The air chamber 12 is filled with air. The tube 22 may be embodied as a hollow structure having first and second opposite ends. The first end is fixed on the plug body 21 and communicated with the insulating oil cavity 11, and the second end passes through a mounting hole arranged at the top end of the cylinder body 1.
In order to ensure the sealing performance of the fitting position between the pipe body 22 and the cylinder 1, the automatic standard oil sample storage device may further include a first sealing member. The first seal is provided between the pipe body 22 and the mounting hole of the cylinder block 1. In particular, the first sealing element may be a rubber sealing ring. The number of the first sealing members may be one or more (for example, 2) to further ensure the reliability of the sealing position.
Further, in order to ensure the sealing performance of the fitting position between the plug body 21 and the cylinder 1, the automatic standard oil sample storage device may further include a second sealing member disposed between the plug body 21 and the cylinder 1. In particular, the second sealing element may be a rubber sealing ring. The number of the second sealing members may be one or more (for example, 2) to further ensure the reliability of the sealing position.
A first opening 110 communicating with the insulating oil chamber 11 is provided on the cylinder block 1 near the bottom end. The first opening 110 is connected to the oil outlet valve 13. When the oil outlet valve 13 is in an open state, the oil in the insulating oil chamber 11 can flow out through the first opening 110.
A second opening 120 communicating with the air chamber 12 is provided in the cylinder block 1 near the top end. The second opening 120 is connected to an air supply mechanism. The air supply mechanism may include a compressed air pump 21, an air intake valve 22, a connection valve 24, and a pressure gauge 25, which are arranged in this order along the pipeline and connected to the second opening 120.
In the present embodiment, the automatic standard oil sample storage device further includes an exhaust valve 23, and the exhaust valve 23 is provided on a line between the intake valve 22 and the connection valve 24.
Specifically, a three-way structure is provided between the connection valve 24 and the intake valve 22, and the exhaust valve 23 is provided on a line between the intake valve 22 and the connection valve 24 by the three-way structure. The vent valve 23 acts as a gas relief valve to ensure that the pressure does not exceed the relief valve limit. Specifically, the safety valve limit of the exhaust valve 23 is not exclusive, and the safety valve limit can be adjusted by screwing a screw.
In use, when the automatic standard oil sample storage device supplies standard oil to the online oil chromatography monitoring device 3, the compressed air pump 21 injects air with pressure into the air cavity 12, the piston 2 moves to the bottom end side of the cylinder 1, and the length of the tube 22 exposed out of the cylinder 1 is shortened. Since the length of the tube 22 is not changed, in use, the tube 22 moves downward with the decrease of the remaining oil, and the exposed length is correspondingly decreased, i.e. the volume of the remaining oil is in direct proportion to the exposed length of the tube 22. By observing the length of the tube 22 exposed to the cylinder 1, the volume of oil remaining in the cylinder 1 can be determined.
In one embodiment, in order to more intuitively determine the length of the tube 22 exposed out of the cylinder 1, a volume scale 220 may be provided on the tube 22, and the volume scale 220 may be calibrated according to the corresponding relationship between the length of the tube 22 exposed out of the cylinder 1 and the volume of the remaining oil. When the piston 2 moves, the length of the tube 22 exposed out of the cylinder 1 changes, so that the position of the corresponding scale mark 220 also changes, and the current volume of the remaining oil can be directly acquired by reading the volume scale on the tube 22.
In this embodiment, a stirring member 15 is disposed in the insulating oil chamber 11 and near the bottom end, and the stirring member 15 is driven by an external non-contact magnetic mechanism to drive the oil sample to rotate, so as to ensure rapid and uniform mixing of the components of the insulating oil sample and maintain consistency of concentration during verification. Specifically, this stirring piece 15 can be polytetrafluoroethylene magnetic stirrers, and its overall structure is simple, and oil storage device is good at in life, and can not break down.
Further, a groove 16 is formed at the bottom end of the cylinder body 1, and the stirring member 15 is located in the groove 16. When the magnetic stirrer is placed in the groove 16 at the bottom of the cylinder body 1, the magnetic stirrer is not in direct contact with the outside through magnetic rotation, so that the sealing property of the device is ensured; meanwhile, facilities with polarity conversion provided externally are completely isolated from the cylinder body 1, high pressure can be resisted, and sealing positive pressure use of the cylinder body 1 is guaranteed.
In this embodiment, the magnetic stirring plate 31 can rotate by driving the stirring member 15. Specifically, when the polarity of the stirring motor 30 is changed, it may change the direction of the magnetism, thereby changing the rotation direction of the stirring member 15.
The magnetic stirring disk 31 may comprise a teflon disk having permanent magnets fixed to the teflon disk. The magnetic stirring disk 31 is driven by the stirring motor 30 to rotate, and simultaneously the stirring piece 15 sealed in the groove 16 of the cylinder body 1 is driven by coupling to synchronously rotate, so that the external power is transmitted to the internal stirring piece 15 without contact and friction. Through the stirring of stirring piece 15 (magnetic stirrers), can realize the flash mixed of gaseous in the insulating oil even, reduce the mixing time that stews of traditional accumulator, improve work efficiency.
In the present embodiment, the stirring motor 30 is used to provide a driving force for the magnetic stirring disk 31. Specifically, the stirring motor 30 is a motor with changeable polarity, and can change the magnetism of the magnetic stirring disc 31 to change the rotation direction of the stirring member 15.
In particular, the starter motor should be slowly ramped up from 0 to the rated speed due to inertia and insulating oil resistance, otherwise the agitator may not be able to keep up with the speed of the agitator motor 30. And finally, the stirring speed reaches and is maintained at 200r/min, the stirring is stopped after the stirring is rotated at a constant speed anticlockwise for a period of time, and the stirring is reversely started and rotated in the same starting mode, so that a stirring period of turning rotation is formed, and the insulating oil is enabled to be mixed more quickly and efficiently.
Based on the standard oil sample automatic storage that provides in this application description, as shown in fig. 2, also provide an oil chromatogram on-line monitoring system in this application description, it includes: the standard oil sample automatic storage that provides in the above-mentioned embodiment, and oil chromatogram on-line monitoring device 3 and waste oil bucket 4 with standard oil sample automatic storage intercommunication, oil chromatogram on-line monitoring device 3 has relative entry end and exit end, and the entry end is connected to oil outlet valve 13, and the exit end is connected to waste oil bucket 4.
For the specific composition, structure, connection relationship, technical effects and the like of the standard oil sample automatic storage, please refer to the specific description of the implementation of the standard oil sample automatic storage, which is not described herein again.
Generally, the method for checking the accuracy of the oil chromatography on-line monitoring device 3 by using the oil chromatography on-line monitoring system provided by the application can adopt a standard oil sample comparison method.
The standard oil sample comparison method comprises the steps of injecting standard gas into white oil with a certain volume, uniformly mixing the gas in the oil through a circulating pump to prepare a standard oil sample, detecting the concentration of the standard oil sample through a laboratory gas chromatograph, and comparing the data of an online monitoring device with the data of the standard oil sample to obtain the data accuracy of the device. The method is characterized in that standard oil samples are quantitatively prepared by utilizing standard gas. However, in order to prepare oil samples with ideal concentrations, at least 3 sets of oil samples with different concentrations, namely low, medium and high, need to be prepared for detection, and multiple times of verification are required.
On the whole, the purpose of the verification is that the transformer oil chromatogram online monitoring device 3 detects standard oil with known concentration, and the performance of the online monitoring device is evaluated according to the difference between the online device and the true value (A level, B level, C level and unqualified level).
The oil chromatogram on-line monitoring system provided in the embodiment is mainly used for matching setting aiming at a directly verified scene. During direct check-up, the waste oil barrel 4 discharge is directly passed through to the standard oil appearance, not reuse. For the scene of direct verification, because the waste oil after degassing is directly discharged once every verification, the problem of the volume of the residual oil needs to be considered, namely the volume of the residual oil in the automatic standard oil sample storage is specific, and the standard oil sample can be provided for the oil chromatogram online monitoring devices 3. In the embodiment of the application, the standard oil sample automatic storage device is arranged, so that the problem can be well solved.
Based on the oil chromatography on-line monitoring system provided in the above embodiment, the present specification further provides a use method of the oil chromatography on-line monitoring system.
Step 1: before checking, turning on the stirring motor 30, and driving the stirring piece 15 to rotate until the oil sample is uniformly stirred; will be mixed with
Step 2: during inspection, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are started, the outlet of the oil outlet valve 13 is connected with the inlet pipe of the oil chromatography on-line monitoring device 3, the waste oil barrel 4 is discharged from the outlet pipe of the oil chromatography on-line monitoring device, and then the inspection is carried out;
step 3: after the calibration is finished, the stirring motor 30 is closed, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are opened, the outlet of the oil outlet valve 13 is connected with the oil resistant pipe 6 and is discharged to the waste oil tank 4, and after the pipe body 22 is lowered to the lowest position at a certain speed, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are sequentially closed;
step 4: before the standard oil sample automatic storage device stores oil again, the rear pipeline of the exhaust valve 23 is butted with the rear pipeline of the oil outlet valve 13, the compressed air pump 21, the air inlet valve 22, the exhaust valve 23 and the oil storage valve 14 are opened, the piston 2 rod is lifted under the action of air pressure, and after the pipe body 22 slowly rises to the highest position, the oil storage valve 14, the exhaust valve 23, the air inlet valve 22 and the compressed air pump 21 are closed in sequence;
step 5: when storing oil, with lower part oil outlet valve 13 and the exit linkage of oil distribution device, the discharge valve 23 at top is connected resistant oil pipe 6 and is discharged to waste oil bucket 4, opens lower part oil outlet valve 13 and top discharge valve 23, begins the oil feed, opens agitator motor 30 simultaneously, closes top discharge valve 23 and lower part oil outlet valve 13 in proper order after top blast pipe produces oil.
Step 6: after the insulating oil is transferred, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are opened to increase the pressure of the air chamber 12.
As shown in fig. 2, before the on-site verification, the standard oil sample automatic storage is powered on, the magnetic stirring motor 30 is firstly turned on to fully stir the stirrer, and the on-site verification is performed after the oil sample is fully and uniformly stirred. When the on-site calibration is carried out, the oil outlet valve 13 is connected with an inlet pipe of the on-line chromatographic monitoring device. The outlet of the on-line chromatographic monitoring device can be connected with the oil storage valve 14, and the oil sample can be automatically circulated and continuously detected by the built-in pump of the on-line chromatographic monitoring device for the dissolved gas in the oil.
After the calibration is finished, the stirring motor 30 is closed, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are opened, the outlet of the oil outlet valve 13 is connected with the oil resistant pipe 6 and is discharged to the waste oil barrel 4, and after the piston 2 slowly descends to the scale mark 220 of 0mm, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are sequentially closed.
As shown in fig. 3, before the automatic storage device stores oil again, the rear pipeline of the exhaust valve 23 is butted with the rear pipeline of the oil outlet valve 13, the compressed air pump 21, the intake valve 22, the exhaust valve 23 and the oil storage ball valve are opened, the piston 2 rod is lifted under the action of air pressure, and after the piston 2 rod slowly rises to the scale mark 220 of 500mm, the oil storage valve 14, the exhaust valve 23, the intake valve 22 and the compressed air pump 21 are closed in sequence.
When storing oil, with lower part delivery valve 13 and the exit linkage of joining in marriage oily device, top exhaust ball valve is connected and is able to bear or endure oil pipe 6 and discharge to waste oil bucket 4, opens lower part delivery valve and top discharge valve 23, and the accumulator begins the oil feed, opens agitator motor 30 simultaneously, makes insulating oil flash mixed even, closes top discharge valve 23 and lower part delivery valve 13 in proper order after top discharge pipe produces oil. After the insulating oil is transferred, the compressed air pump 21, the air inlet valve 22 and the connecting valve 24 are opened to increase the pressure of the air cavity of the storage device, so that the device is in a positive pressure state during storage and use, and the influence on the concentration of gas components caused by the entering of external air, moisture and the like is prevented.
It should be noted that, in the description of the present application, the terms "first", "second", and the like are used for descriptive purposes only and for distinguishing similar objects, and no precedence between the two is intended or should be construed to indicate or imply relative importance. In addition, in the description of the present application, "a plurality" means two or more unless otherwise specified.
The above embodiments in the present specification are all described in a progressive manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment is described with emphasis on being different from other embodiments.
The above description is only a few embodiments of the present invention, and although the embodiments of the present invention are described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. An automatic standard oil sample storage device, comprising:
a cylinder having a predetermined volume, the cylinder having opposing top and bottom ends;
the piston is movably arranged in the cylinder body and comprises a plug body which divides the cylinder body into an insulating oil cavity and an air cavity, and a pipe body communicated with the insulating oil cavity;
the air supply mechanism is communicated with the air cavity and comprises a compressed air pump, and the piston can move after the compressed air pump is started;
the stirring piece is arranged in the insulating oil cavity and close to the bottom end side;
the magnetic stirring disc is arranged outside the insulating oil cavity and below the stirring piece, and the stirring motor is used for driving the magnetic stirring disc to rotate in a non-contact mode.
2. The automatic standard oil sample storage device according to claim 1, wherein the cylinder body is provided with a second opening communicating with the air chamber at a position near the top end, the air supply mechanism is provided at the second opening,
the air supply mechanism further comprises an air inlet valve, a connecting valve and a pressure gauge, and the compressed air pump, the air inlet valve, the connecting valve and the pressure gauge are sequentially arranged along the pipeline.
3. The automatic standard oil sample storage according to claim 2, further comprising an exhaust valve provided on a line between the intake valve and the connection valve.
4. The automatic standard oil sample storage device according to claim 3, wherein a groove is formed at the bottom end of the cylinder body, and the stirring member is located in the groove.
5. The automatic standard oil sample storage device according to claim 4, wherein the stirring motor is a polarity-switching motor capable of changing the magnetism of the magnetic stirring disk to change the rotation direction of the stirring member.
6. The automatic standard oil sample storage device according to claim 5, wherein the stirring motor is started and gradually increased from 0 to a rated rotation speed, and when the stirring motor is at the rated rotation speed, the rotation speed of the stirring member is 200 rpm.
7. The automated standard oil sample storage device according to claim 6, wherein the tube body is a hollow structure having a first end and a second end opposite to each other, the first end is fixed on the plug body, and the second end passes through the mounting hole at the top end of the cylinder body; an oil storage valve is arranged close to the second end.
8. An oil chromatogram on-line monitoring system is characterized by comprising: the automatic standard oil sample storage device as claimed in claim 7, and an on-line oil chromatography monitoring device and a waste oil barrel which are communicated with the automatic standard oil sample storage device, wherein the on-line oil chromatography monitoring device is provided with an opposite inlet end and an opposite outlet end, the inlet end is connected to an oil outlet valve arranged on the cylinder body, and the outlet end is connected to the waste oil barrel.
9. The use method of the oil chromatography on-line monitoring system based on claim 8 is characterized by comprising the following steps:
before checking, turning on a stirring motor, and driving a stirring piece to rotate until the oil sample is uniformly stirred; will be mixed with
During inspection, a compressed air pump, an air inlet valve and a connecting valve are started, an outlet of an oil outlet valve is connected with an inlet pipe of an oil chromatography online monitoring device, an outlet pipe of the oil chromatography online monitoring device discharges the oil to a waste oil tank, and then calibration is carried out;
after the calibration is finished, the stirring motor is closed, the compressed air pump, the air inlet valve and the connecting valve are opened, the outlet of the oil outlet valve is connected with the oil-resistant pipe and discharged to the waste oil tank, and the compressed air pump, the air inlet valve and the connecting valve are sequentially closed after the pipe body is lowered to the lowest position at a certain speed;
before the standard oil sample automatic storage device stores oil again, the exhaust valve rear pipeline is butted with the oil outlet valve rear pipeline, the compressed air pump, the air inlet valve, the exhaust valve and the oil storage valve are opened, the piston rod is lifted under the action of air pressure, and after the pipe body slowly rises to the highest position, the oil storage valve, the exhaust valve, the air inlet valve and the compressed air pump are closed in sequence;
when oil is stored, the lower oil outlet valve is connected with an outlet of an oil distribution device, the exhaust valve at the top is connected with an oil-resistant pipe and discharged to a waste oil barrel, the lower oil outlet valve and the top exhaust valve are opened to start oil feeding, the stirring motor is simultaneously opened, and the top exhaust valve and the lower oil outlet valve are sequentially closed after the top exhaust pipe discharges oil;
and after the insulating oil is transferred, opening the compressed air pump, the air inlet valve and the connecting valve to increase the pressure of the air cavity.
10. The use method of the on-line oil chromatography monitoring system as claimed in claim 9, wherein the stirring motor is started and gradually increased from 0 to a rated rotation speed, and when the stirring motor is at the rated rotation speed, the rated rotation speed of the stirring member is 200 rpm; and after the rotating shaft rotates for a preset time at the rated rotating speed, the rotating shaft is reversed, and the rotating direction is periodically changed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110038389.9A CN112649547A (en) | 2021-01-12 | 2021-01-12 | Automatic standard oil sample storage device, oil chromatography on-line monitoring system and using method thereof |
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| CN202110038389.9A CN112649547A (en) | 2021-01-12 | 2021-01-12 | Automatic standard oil sample storage device, oil chromatography on-line monitoring system and using method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654837A (en) * | 2021-06-18 | 2021-11-16 | 国网山东省电力公司淄博供电公司 | Oil gas simulation sampling device of transformer |
| CN114212752A (en) * | 2021-12-01 | 2022-03-22 | 长缆电工科技股份有限公司 | High-voltage cable terminal insulating oil heating filling system and filling method |
-
2021
- 2021-01-12 CN CN202110038389.9A patent/CN112649547A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113654837A (en) * | 2021-06-18 | 2021-11-16 | 国网山东省电力公司淄博供电公司 | Oil gas simulation sampling device of transformer |
| CN114212752A (en) * | 2021-12-01 | 2022-03-22 | 长缆电工科技股份有限公司 | High-voltage cable terminal insulating oil heating filling system and filling method |
| CN114212752B (en) * | 2021-12-01 | 2022-10-14 | 长缆电工科技股份有限公司 | High-voltage cable terminal insulating oil heating filling system and filling method |
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