CN213933236U

CN213933236U - Oil taking and injecting equipment for chromatographic detection of transformer oil

Info

Publication number: CN213933236U
Application number: CN202022344413.5U
Authority: CN
Inventors: 张琪; 彭俊吉; 杨子龙; 管伟
Original assignee: Hunan Guangsi Technology Co ltd
Current assignee: Hunan Guangsi Technology Co ltd
Priority date: 2020-10-20
Filing date: 2020-10-20
Publication date: 2021-08-10
Anticipated expiration: 2030-10-20

Abstract

The utility model provides a transformer oil chromatogram detects with getting oiling equipment. Transformer oil chromatography detects with getting oiling equipment includes sample storage room, connection vacuum system, the nitrogen system of sample storage room, sample storage room is equipped with two in the co-altitude and gets the oil pipe and be connected with the oil mouth of getting of transformer, be equipped with the trachea in the top simultaneously with vacuum system nitrogen system connects, is equipped with the governing pipe in the bottom and is connected with governing system. The utility model provides a transformer oil chromatography detects with getting oiling equipment and having solved prior art's transformer sample detection's mode easily leads to oil to be contaminated, the error is big, there is the technical problem of potential safety hazard.

Description

Oil taking and injecting equipment for chromatographic detection of transformer oil

Technical Field

The utility model relates to a transformer oil detection area, concretely relates to transformer oil chromatogram detects with getting oiling equipment.

Background

The chromatographic detection and analysis of the transformer oil are the main means for monitoring the content of the dissolved gas in the transformer oil at present, and the detection method can be used for monitoring in real time by using a special online transformer oil chromatographic analysis instrument, and can also be used for detecting by a professional after sampling from an oil taking port of the transformer and sending the sample to a laboratory. No matter how the detection is carried out by any method, a sampling process is needed, and the most important point of sampling is to ensure that the retrieved sample oil is consistent with the oil characteristics in the original transformer, so that the correctness of the detection result can be ensured, and adverse effects and hidden dangers (such as air enters the transformer in the sampling process or bubbles generated in the oil flow back to the transformer in the sampling process) cannot be caused to the transformer in the sampling process. The daily manual sampling is mostly performed through pressure difference, the source is that the height of a main transformer body oil tank is higher than the sampling position, and a positive pressure method is adopted in the sampling process due to the relation that liquid flows from the place high and outside, namely, the pressure of main transformer body oil is utilized to push an injector core, so that the oil enters an injector. However, in actual work, due to factors such as weather, the position of the sampling port, the surrounding environment, misoperation, pollution in transportation and the like, the consistency of the retrieved oil sample and the original transformer oil is difficult to ensure, so that the sample oil test result is deviated. Although the online line type transformer oil chromatographic analysis instrument is used for real-time sampling detection, the online line type transformer oil chromatographic analysis instrument also faces complex conditions during sampling, so that the detection result is inaccurate, the error is large, even secondary pollution is caused to transformer oil, and potential safety hazards are brought to a power transformer.

SUMMERY OF THE UTILITY MODEL

For the technical problem who solves prior art's transformer sampling test's mode easily lead to oil contaminated, the error is big, have the potential safety hazard, the utility model provides a transformer oil chromatogram that can solve several above-mentioned problems detects with getting oiling equipment.

The sampling and oiling device for the chromatographic detection of transformer oil comprises a sample storage chamber, a vacuum system and a nitrogen system, wherein the vacuum system is connected with the sample storage chamber; the adjusting system comprises an oil cylinder, a piston rod and a power mechanism, one end of the oil cylinder is connected with the adjusting pipe, the piston is arranged in the oil cylinder, and one surface of the oil cylinder, which is far away from the adjusting pipe, is sequentially connected with the piston rod and the power mechanism; and the two oil taking pipes, the air pipe and two branches connected with the vacuum system and the nitrogen system are provided with valves.

The utility model provides a transformer oil chromatography detects with getting a preferred embodiment of oiling equipment, the indoor top of storing up the appearance is equipped with pressure sensor, level sensor. The power mechanism is a low-speed motor which moves linearly.

The utility model provides a transformer oil chromatography detects with getting a preferred embodiment of oiling equipment, vacuum system includes the vacuum pump, and its air inlet is connected a branch of trachea is equipped with the vacuum pump valve. The nitrogen system comprises a nitrogen cylinder, and an exhaust port of the nitrogen cylinder is connected with the other branch of the air pipe and is sequentially provided with a pressure regulating valve and a nitrogen cylinder valve. The gas pipe is provided with a gas pipe valve, one of the oil taking pipes close to the top is provided with a first oil taking valve, and the other oil taking pipe is provided with a second oil taking valve.

Compared with the prior art, the utility model provides a transformer oil chromatography detects and utilizes oil cylinder piston to produce the negative pressure with getting oiling equipment and get oil, and this method both can be used artifical sample and also can be applied to the automatic sampling among the online chromatography detection device. The sampling is safe and reliable, and secondary pollution to the transformer oil can not be caused. And the online sampling detection is realized, a special sample storage chamber is not needed, and the sample storage chamber can be directly changed into a degassing chamber for use.

Drawings

FIG. 1 is a schematic structural diagram of an oil extracting and injecting device for transformer oil chromatography detection.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Please refer to fig. 1, which is a schematic structural diagram of an oil extracting and injecting device 1 for transformer oil chromatography detection according to the present invention. The oil taking and injecting device 1 for transformer oil chromatographic detection comprises a sample storage chamber 2, a vacuum system 3, a nitrogen system 4 and an adjusting system 5.

The sample storage chamber 2 is a square cavity, and a first oil sampling valve 21 and a second oil sampling valve 22 are respectively arranged on the upper and lower parts of the left side (viewed from the figure) of the sample storage chamber, and are respectively connected with an oil sampling pipeline 23 to an oil outlet valve 61 of the transformer 6. The top of the inner part is provided with a pressure sensor 24 and a liquid level sensor 25. The right bottom position is connected with the adjusting system 5.

The regulating system 5 comprises a regulating tube 51, a cylinder 52, a piston 53, a piston rod 54, and a low-speed linear module (not shown in the drawing). The right end of the oil cylinder 52 is communicated with the bottom of the right side of the sample storage chamber 2 through the adjusting pipe 51, the piston 53 capable of sliding in a sealing mode is arranged inside the oil cylinder, and the left side of the oil cylinder is sequentially connected with the piston rod 54 and the low-speed linear module.

The vacuum system 3 comprises a vacuum pump 31, an air inlet of which is provided with a vacuum pump valve 32 and is connected to the top of the sample storage chamber 2 through a vacuum pump air pipe. The nitrogen system 4 comprises a nitrogen cylinder 41, an exhaust port of which is provided with a pressure regulating valve 42 and a nitrogen cylinder valve 43, and is connected to the top of the sample storage chamber 2 through a nitrogen cylinder air pipe. The vacuum pump air pipe and the nitrogen bottle air pipe are converged into the same pipeline to be connected with the sample storage chamber 2, and an air pipe valve 26 is arranged.

In specific implementation, the oil outlet valve 61 is closed, the first oil taking valve 21, the second oil taking valve 22, the air pipe valve 26 and the vacuum pump valve 32 are opened, and the vacuum pump 31 is started to vacuumize the oil taking pipeline 23 and the sample storage chamber 2.

And when the vacuum degree is-50 KPa, closing the vacuum pump 31 and the vacuum pump valve 32, opening the nitrogen gas bottle 41 and the nitrogen gas bottle valve 42, and injecting high-purity nitrogen gas into the pipeline system. And then repeating the operation to clean the pipeline system.

The last vacuum pumping is ensured to be more than the vacuum degree inside the transformer 6, for example, when the inside of the transformer 6 is-50 KPa, the vacuum degree can be pumped to-60 Kpa to-80 Kpa. After the evacuation is completed, the air pipe valve 26 is closed, and the second oil extraction valve 22 is opened. At this time, the oil in the transformer 6 will flow into the sample storage chamber 2 due to the pressure difference until the pressures at the two ends are balanced.

And closing the second oil extraction valve 22, opening the first oil extraction valve 21, and controlling the low-speed linear module to drive the piston 53 to perform telescopic motion. The piston 53 draws oil in the transformer 6 out through the first oil taking valve 21 in the process of moving from one end (end A) close to the adjusting pipe 51 to the other end (end B); during the process of moving from the end B to the end a, the oil is not discharged from the second oil taking valve 22 due to the pressure difference, and the oil is not discharged from the first oil taking valve 22 until the liquid level reaches the first oil taking valve 21. The plunger 53 repeats the retracting movement until the required sampling amount is reached.

After the oil sampling is detected, the gas pipe valve 26 and the nitrogen cylinder valve 42 are opened, and the sample storage chamber 2 is filled with high-purity nitrogen. And controlling the piston 53 to move to the end B, and opening the second oil extraction valve 22. Finally, the piston 53 is controlled to move towards the end A, so that the oil is gradually pressed back into the transformer 6 from the sample storage chamber 2.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes made by the present specification can be changed, or directly or indirectly applied to other related technical fields, and all the same principles are included in the protection scope of the present invention.

Claims

1. The utility model provides a transformer oil chromatogram detects with getting oiling equipment, includes sample storage room, connection vacuum system, nitrogen gas system, its characterized in that of sample storage room: the sample storage chamber is provided with two oil taking pipes at different heights to be connected with an oil taking port of a transformer, the top of the sample storage chamber is provided with an air pipe to be simultaneously connected with the vacuum system and the nitrogen system, and the bottom of the sample storage chamber is provided with an adjusting pipe to be connected with an adjusting system; the adjusting system comprises an oil cylinder, a piston rod and a power mechanism, one end of the oil cylinder is connected with the adjusting pipe, the piston is arranged in the oil cylinder, and one surface of the oil cylinder, which is far away from the adjusting pipe, is sequentially connected with the piston rod and the power mechanism; and the two oil taking pipes, the air pipe and two branches connected with the vacuum system and the nitrogen system are provided with valves.

2. The oil extracting and injecting device for transformer oil chromatographic detection according to claim 1, wherein: and a pressure sensor and a liquid level sensor are arranged at the top part in the sample storage chamber.

3. The oil extracting and injecting device for transformer oil chromatographic detection according to claim 1, wherein: the power mechanism is a low-speed motor which moves linearly.

4. The oil extracting and injecting device for transformer oil chromatographic detection according to any one of claims 1 to 3, characterized in that: the vacuum system comprises a vacuum pump, and an air inlet of the vacuum system is connected with one branch of the air pipe and is provided with a vacuum pump valve.

5. The oil extracting and injecting device for transformer oil chromatographic detection according to claim 4, wherein the device comprises: the nitrogen system comprises a nitrogen cylinder, and an exhaust port of the nitrogen cylinder is connected with the other branch of the air pipe and is sequentially provided with a pressure regulating valve and a nitrogen cylinder valve.

6. The oil extracting and injecting device for transformer oil chromatographic detection according to claim 5, wherein: the gas pipe is provided with a gas pipe valve, one of the oil taking pipes close to the top is provided with a first oil taking valve, and the other oil taking pipe is provided with a second oil taking valve.