Portable device for detecting gas dissolved in oil

Abstract

The utility model relates to a portable calibration device for gas dissolved in oil. The portable calibration device comprises a carrier gas unit, a sample introduction unit, a degassing unit and an analysis unit, according to the device, an oil sample is injected from the sample injection unit, degassing treatment is performed on the oil sample through the degassing unit, after degassing is completed, carrier gas fed by the carrier gas unit enables gas separated from the oil sample to be fed into the analysis unit through a six-way valve, finally, a detector in the analysis unit detects the gas, and a result is fed into the data acquisition and analysis module. And the result is displayed by the embedded operation interface. The device provided by the utility model has the advantages of integrated arrangement, small volume and convenience in carrying, and can be used for directly verifying the on-site transformer oil sample, thereby avoiding errors caused by transportation and placement of the oil sample.

Description

Technical Field

[0001] This utility model relates to the field of chromatograph detection technology, specifically to a portable oil dissolved gas detection device. Background Technology

[0002] There are two types of dissolved gas analysis in transformer oil: offline and online. However, offline laboratory testing has many shortcomings, such as long intervals and complex procedures. Offline laboratory instruments require a lot of gas sources and are bulky. They also involve dangerous gases and cannot be used for on-site monitoring, which is not conducive to the detection of sudden faults.

[0003] With technological advancements, online dissolved gas detection methods in transformer oil have gradually gained traction. This approach involves connecting an online dissolved gas analyzer to the transformer to monitor the composition and content of dissolved gases in the oil in real time. However, these devices are not integrated, are generally bulky and heavy, making them inconvenient to carry. Once at the detection location, they require fixed installation, making operation time-consuming and labor-intensive. Furthermore, existing devices necessitate external gas cylinders, which are expensive and have high operating and maintenance costs. Therefore, a portable online detection device is urgently needed. Utility Model Content

[0004] To address the shortcomings of existing technologies, this invention provides a portable oil dissolved gas detection device to solve the aforementioned problems.

[0005] This utility model provides the following technical solution:

[0006] A portable oil dissolved gas detection device includes a carrier gas unit, a sample injection unit, a degassing unit, and an analysis unit;

[0007] The carrier gas unit includes a carrier gas generator, which is located at the rear of the portable oil dissolved gas detection device. The upper front part of the carrier gas generator is provided with a carrier gas interface, which is connected in sequence to a V11 solenoid valve, a pressure regulating valve, and a six-way valve.

[0008] The sample injection unit is equipped with an oil inlet and outlet interface, which is located at the lower front of the portable oil dissolved gas detection device. The outlet of the oil inlet and outlet interface is sequentially connected to a filter, a V1 solenoid valve, an oil pump, and the inlet of the degassing chamber. The inlet of the oil inlet and outlet interface is connected to the outlet of the degassing chamber side wall through a V2 solenoid valve.

[0009] The degassing unit includes a degassing chamber located in the middle of the device. A level detector, a V3 solenoid valve, an oil separator, a level switch, and a pressure sensor are sequentially connected to the top of the degassing chamber, which is then connected to an air pump at the front of the chamber. The inlet of the degassing chamber is connected to an oil cylinder and a waste oil bag via a V9 solenoid valve. The oil cylinder and the waste oil bag are connected in parallel. A V6 solenoid valve is installed at the inlet of the waste oil bag. A vacuum pump is located in the middle of the front of the device and is connected to a six-way valve and the air pump via a V5 solenoid valve. The six-way valve and the air pump are connected in parallel.

[0010] The analysis unit includes a detector and a data acquisition and analysis module. The detector is connected to the six-way valve, and the data acquisition and analysis module is located on the top front side of the portable oil dissolved gas detection device.

[0011] Furthermore, one side of the oil separator is connected to a V8 solenoid valve via an oil pump through a V10 solenoid valve, and is ultimately connected to the six-way valve.

[0012] Furthermore, an embedded operating interface is provided on the upper front side of the device.

[0013] Furthermore, the portable dissolved gas in oil detection device is provided with an oil sampler interface on its top. The oil sampler interface is connected in sequence to the filter 2 and the V7 solenoid valve at the bottom of the portable dissolved gas in oil detection device and then connected between the oil pump and the V1 solenoid valve.

[0014] Furthermore, a magnetic stirrer is installed in the degassing chamber.

[0015] Furthermore, a V4 solenoid valve is also installed between the air pump and the V5 solenoid valve.

[0016] Furthermore, the degassing unit also includes a temperature controller and a pressure regulator.

[0017] Furthermore, the analysis unit is equipped with an intelligent temperature control system.

[0018] Furthermore, the bottom of the device is also equipped with rollers.

[0019] This utility model has the following beneficial technical effects:

[0020] This invention integrates a carrier gas unit, a sampling unit, a degassing unit, and an analysis unit into a portable device through a reasonable and compact layout, enabling online detection of dissolved gases in oil. The device is equipped with wheels at the bottom for easy portability. This integrated design reduces the device's size. Furthermore, the device features inlet and outlet oil interfaces and an oil sampler interface, eliminating the need for installation and fixation upon arrival at the site. It allows for direct calibration using on-site transformer oil samples, avoiding errors caused by sample transportation and prolonged storage. This invention also integrates a vacuum regeneration carrier gas generator, eliminating the need for external carrier gas cylinders containing hydrogen and nitrogen; only high-purity air is required, resulting in low operating and maintenance costs. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a portable oil dissolved gas testing device according to the present invention.

[0022] The attached figures are labeled as follows:

[0023] 1. Embedded operating interface; 2. Data acquisition and analysis module; 3. Detector; 4. Six-way valve; 501. V1 solenoid valve; 502. V2 solenoid valve; 503. V3 solenoid valve; 504. V4 solenoid valve; 505. V5 solenoid valve; 506. V6 solenoid valve; 507. V7 solenoid valve; 508. V8 solenoid valve; 509. V9 solenoid valve; 5010. V10 solenoid valve; 5011. V11 solenoid valve; 6. Vacuum pump; 7. Air pump; 8. Oil cylinder; 9. Waste oil bag; 10. Oil inlet / outlet interface; 1101. Filter 1; 1102. Filter 2; 12. Oil pump; 13. Degassing chamber; 14. Liquid level detector; 15. Oil separator; 16. Liquid level switch; 17. Pressure sensor; 18. Carrier gas generator; 19. Carrier gas interface; 20. Oil extractor interface; 21. Pressure regulator valve. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Example

[0026] A portable oil dissolved gas calibration device includes a carrier gas unit, a sample injection unit, a degassing unit, and an analysis unit. The carrier gas unit includes a vacuum-regenerated carrier gas generator 18, which regenerates high-purity air based on pressure swing adsorption (PSA) technology. The carrier gas generator 18 is located at the rear of the device, and a carrier gas interface 19 is located above its front side. The carrier gas generator 18 is sequentially connected to a V11 solenoid valve 5011, a pressure regulating valve 21, and a six-way valve 4 via the carrier gas interface 19, providing maintenance-free carrier gas to the analysis unit. The sample injection unit includes an oil inlet / outlet interface 10, which is located at the... Below the front side of the device, the outlet of the oil inlet / outlet port 10 is sequentially connected to a filter 1101 and a V1 solenoid valve 501. Oil samples are injected through the outlet of the oil inlet / outlet port 10, filtered by the filter 1101, and the flow rate is controlled by the V1 solenoid valve 501. The oil sample is then injected into the inlet below the front side of the degassing chamber 13 via the oil pump 12. The inlet of the oil inlet / outlet port 10 is connected to the outlet above the rear side of the degassing chamber 13 via a V2 solenoid valve 502. Oil samples in the degassing chamber 13 can be recovered through the outlet of the oil inlet / outlet port 10. The degassing unit includes a degassing chamber 13, which is located in the middle of the device. The degassing chamber 13 contains... A magnetic stirrer; the top outlet of the degassing chamber 13 is sequentially connected to a level detector 14, a V3 solenoid valve 503, an oil separator 15, a level switch 16, and a pressure sensor 17, and then connected to an air pump 7 at the front of the degassing chamber 13. The inlet at the lower front of the degassing chamber 13 is also connected to an oil cylinder 8 and a waste oil bag 9 via a V9 solenoid valve 509. The oil cylinder 8 and the waste oil bag 9 are connected in parallel. A V6 solenoid valve 506 is installed at the inlet of the waste oil bag 9. A vacuum pump 6 is located in the middle of the front of the device and is connected to a six-way valve 4 and the air pump 7 via a V5 solenoid valve 505. The six-way valve 4 and the air pump 7 are connected in parallel. The air pump 7 and the V5 solenoid valve 505... The unit is also equipped with a V4 solenoid valve 504, and a temperature controller and pressure regulator to ensure complete release of gases from the oil. The degassing unit uses a vacuum pump 6 and an air pump 7 to remove all air from the degassing chamber 13. After evacuation, degassing can be achieved at the lowest pressure, maximizing degassing efficiency. The analysis unit includes a detector 3 and a data acquisition and analysis module 2. The data acquisition and analysis module 2 is located on the upper front side of the portable oil dissolved gas detection device. The detector 3 is connected to the six-way valve 4. The analysis unit is equipped with an intelligent temperature control system that can control the temperature of the detector 3. The detector 3 is used to detect dissolved gases in the oil.

[0027] The front side of the oil separator 15 is connected to the V8 solenoid valve 508, which is connected to the oil pump 12, via the V10 solenoid valve 5010, and is ultimately connected to the six-way valve 4.

[0028] In this embodiment, the detector 3 is a micro-chromatographic column. The micro-chromatographic column can efficiently and stably separate gases and accurately detect characteristic gases dissolved in oil, such as hydrogen (H2), methane (CH4), ethane (C2H6), ethylene (C2H4), acetylene (C2H2), carbon monoxide (CO), and carbon dioxide (CO2).

[0029] In this embodiment, an embedded operation interface 1 is provided on the upper front side of the portable dissolved gas in oil detection device for operation and data display by the operator; the top of the device is also provided with an oil extractor interface 20, which is connected to the filter 1102 and V7 solenoid valve 507 at the bottom of the portable dissolved gas in oil detection device, and then connected between the oil pump 12 and V1 solenoid valve 501.

[0030] In this embodiment, the bottom of the portable oil dissolved gas detection device is also provided with rollers, making the portable oil dissolved gas detection device easy to carry.

[0031] The working principle of this device is as follows: First, the oil cylinder 8 is returned to its original position. Then, an oil sample is injected through the oil inlet / outlet port 10 or the oil sampler port 20. The oil pump 12 sends the oil sample into the degassing chamber 13. Once the oil level reaches the level detector 14, the oil sample is heated. After heating to a certain temperature, the heating is stopped. The air pump 7 and vacuum pump 6 are used to evacuate the degassing chamber 13. The original gas in the degassing chamber 13 is then evacuated through the cooperation of the oil remover 15, the level switch 16, the pressure sensor 17, the V5 solenoid valve 505, and the V4 solenoid valve 504 to complete the vacuuming operation. Next, the magnetic stirrer in the degassing chamber 13 starts stirring, and the degassing process is completed under vacuum. At this time, the gas in the degassing chamber 13 is sent into the six-way valve 4 through the cooperation of the oil remover 15, the liquid level switch 16, the pressure sensor 17 and the V10 solenoid valve 5010. After degassing is completed, the carrier gas sent by the carrier gas generator 18 of the carrier gas unit causes the gas separated from the oil sample to be sent into the analysis unit through the six-way valve 4. Finally, the detector 3 in the analysis unit detects the gas and sends the results to the data acquisition and analysis module 2, and the results are displayed by the embedded operation interface 1.

[0032] The carrier gas unit of this invention is mainly a vacuum regeneration high-purity air generator based on pressure swing adsorption technology. It eliminates the need for an external carrier gas cylinder and can provide maintenance-free carrier gas for the high-frequency monitoring of this product. The methane removal rate in the air is over 95%, the carbon dioxide removal rate is over 99%, and the dew point is below -50℃, exceeding the performance of cylinder-loaded gas. Therefore, the device has the capability for long-term online monitoring and can be used for long-term online monitoring in emergency situations on-site.

[0033] This utility model device integrates the sample introduction unit, degassing unit, analysis unit and carrier gas unit into one unit through miniaturization and ingenious layout, realizing a miniaturized design. It is small in size and light in weight, easy to carry, and suitable for on-site transformer oil sample calibration, reducing errors caused by oil sample transportation and placement.

[0034] The embodiments described above merely illustrate specific implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these modifications and improvements all fall within the protection scope of this utility model.

Claims

1. A portable oil dissolved gas detection device, comprising a carrier gas unit, a sample injection unit, a degassing unit, and an analysis unit; characterized in that, The carrier gas unit includes a carrier gas generator, which is located at the rear of the portable oil dissolved gas detection device. The upper front part of the carrier gas generator is provided with a carrier gas interface, which is connected in sequence to a V11 solenoid valve, a pressure regulating valve, and a six-way valve. The sample injection unit is equipped with an oil inlet and outlet interface, which is located at the lower front of the portable oil dissolved gas detection device. The outlet of the oil inlet and outlet interface is sequentially connected to a filter, a V1 solenoid valve, an oil pump, and the inlet of the degassing chamber. The inlet of the oil inlet and outlet interface is connected to the outlet of the degassing chamber side wall through a V2 solenoid valve. The degassing unit includes a degassing chamber located in the middle of the device. A level detector, a V3 solenoid valve, an oil separator, a level switch, and a pressure sensor are sequentially connected to the top of the degassing chamber, which is then connected to an air pump at the front of the chamber. The inlet of the degassing chamber is connected to an oil cylinder and a waste oil bag via a V9 solenoid valve. The oil cylinder and the waste oil bag are connected in parallel. A V6 solenoid valve is located at the inlet of the waste oil bag. A vacuum pump is located in the middle of the front of the device and is connected to a six-way valve and the air pump via a V5 solenoid valve. The six-way valve and the air pump are connected in parallel. The analysis unit includes a detector and a data acquisition and analysis module. The detector is connected to the six-way valve, and the data acquisition and analysis module is located on the upper front side of the portable oil dissolved gas detection device.

2. The portable oil dissolved gas detection device according to claim 1, characterized in that, One side of the oil separator is connected to the V8 solenoid valve via the V10 solenoid valve and the oil pump, and is finally connected to the six-way valve.

3. The portable oil dissolved gas detection device according to claim 1, characterized in that, An embedded operating interface is provided on the upper front side of the device.

4. The portable oil dissolved gas detection device according to claim 1, characterized in that, The portable oil dissolved gas detection device is equipped with an oil sampler interface on its top. The oil sampler interface is connected in sequence to the filter 2 and the V7 solenoid valve at the bottom of the portable oil dissolved gas detection device and then connected between the oil pump and the V1 solenoid valve.

5. A portable oil dissolved gas detection device according to claim 1, characterized in that, A magnetic stirrer is installed in the degassing chamber.

6. A portable oil dissolved gas detection device according to claim 1, characterized in that, A V4 solenoid valve is also installed between the air pump and the V5 solenoid valve.

7. A portable oil dissolved gas detection device according to claim 1, characterized in that, The degassing unit also includes a temperature controller and a pressure regulator.

8. A portable oil dissolved gas detection device according to claim 1, characterized in that, The analysis unit is equipped with an intelligent temperature control system.

9. A portable oil dissolved gas detection device according to claim 1, characterized in that, The portable oil dissolved gas detection device is equipped with rollers at the bottom.

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