A rapid sampling and testing device

Abstract

The present invention relates to a rapid sampling and detection device, which comprises a cylinder and a piston. A sampling nozzle is provided at the front end of the cylinder. The piston is slidably assembled in the cylinder. A detection cavity is formed in the cylinder in front of the piston. A hydrogen sensor is provided at the front end of the piston. A circuit board and a power supply are provided in the piston. The power supply is connected to the circuit board, and the hydrogen sensor is connected to the circuit board. The rapid sampling and detection device of the present invention can detect hydrogen in transformer oil anytime and anywhere, determine the content of hydrogen, and judge the operating status of oil-filled electrical equipment; compared with the traditional method of taking the sample back to the laboratory for detection and analysis, the detection time of dissolved hydrogen in transformer oil is greatly shortened, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the field of gas detection in transformer oil, and in particular to a rapid sampling detection device. Background Art

[0002] Transformer oil-filled electrical equipment in substations, such as oil-immersed transformers, reactors, mutual inductors, bushings, high-voltage circuit breakers, load switches, etc., all contain transformer oil. These devices play a vital role in the power system, and the quality of transformer oil and the change in gas concentration in the oil directly affect the operating performance and life of the equipment. At present, the detection methods for gas in transformer oil mainly include traditional physical and chemical analysis methods, such as using gas chromatography to detect dissolved gas in oil. After oil sampling-oil and gas separation-chromatographic analysis, there are problems such as complex operation, long detection time, and high cost. For the detection of certain specific trace components in transformer oil, such as hydrogen, there is a lack of rapid and accurate detection methods. Summary of the invention

[0003] The purpose of the present invention is to provide a rapid sampling and detection device to solve the problem of long time for the existing hydrogen detection in oil.

[0004] To achieve the above object, the present invention adopts the following technical solution:

[0005] A rapid sampling detection device comprises a cylinder and a piston. A sampling nozzle is arranged at the front end of the cylinder. The piston is slidably assembled in the cylinder. A detection cavity is formed in the cylinder in front of the piston. A hydrogen sensor is arranged at the front end of the piston. A circuit board and a power supply are arranged in the piston. The power supply is connected to the circuit board, and the hydrogen sensor is connected to the circuit board.

[0006] Furthermore, the cylinder is made of glass, and the main body of the piston is made of glass.

[0007] Furthermore, a sealing cover is provided on the front side of the hydrogen sensor, and the sealing cover is provided with a through hole for exposing the hydrogen sensor so as to be in direct contact with the oil in the detection cavity.

[0008] Furthermore, a battery compartment is provided in the power supply, and the power supply adopts a battery.

[0009] Furthermore, an end cover is provided at the rear end of the piston, and a spring is provided between the front side of the end cover and the battery.

[0010] Furthermore, an end cover is provided at the rear end of the piston, and a display screen is provided on the rear side of the end cover, which is electrically connected to the circuit board.

[0011] Furthermore, the outer peripheral surface of the piston and the inner wall of the cylinder are in sliding sealing cooperation.

[0012] Furthermore, the sensor is a hydrogen sensor.

[0013] Furthermore, the sensor adopts a hydrogen sensor. When in use, a certain amount of transformer oil is extracted from the oil-filled electrical equipment; the transformer oil in the detection cavity directly contacts the hydrogen sensor, and the signal processing module on the circuit board processes and analyzes the signal collected by the hydrogen sensor, calculates the hydrogen content dissolved in the oil, and displays it on the display screen.

[0014] Beneficial effects of the present invention:

[0015] When the rapid sampling detection device is in use, if the sensor adopts a hydrogen sensor, a certain amount of transformer oil can be extracted from the oil-filled electrical equipment to detect the hydrogen in the oil. The sampling nozzle is facing the sampling port of the electrical equipment, and the transformer oil is sucked into the detection chamber through the sampling nozzle by pulling the piston backward. The hydrogen sensor can detect it quickly and send the detection signal to the signal processing module on the circuit board. The signal processing module processes and analyzes the collected signal, calculates the hydrogen content dissolved in the oil, and the hydrogen concentration is displayed on the display screen.

[0016] The rapid sampling and detection device of the present invention can detect hydrogen in transformer oil anytime and anywhere, determine the content of hydrogen, judge the operating status of oil-filled electrical equipment, or diagnose equipment failure; compared with the traditional method of taking the sample back to the laboratory for detection and analysis, it can greatly shorten the detection time of dissolved hydrogen in transformer oil and improve the detection efficiency. In addition, the rapid sampling and detection device can be expanded and the sensor therein can be replaced with other types to achieve different detection purposes.

[0017] The rapid sampling detection device of the present invention skillfully combines the detection function with the principle of a syringe, has a simple structure, is easy to manufacture, and has strong practicality, thus solving the problem of lack of a rapid and accurate detection method. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the appearance diagram of the rapid sampling detection device of the present invention;

[0019] Figure 2 is a cross-sectional view of the rapid sampling and detection device of the present invention;

[0020] Figure 3 It is a view of one end of the rapid sampling detection device of the present invention.

[0021] The names corresponding to the marks in the figure are:

[0022] 1. Cylinder; 2. Piston; 3. End cover; 4. Switch; 5. Hydrogen sensor; 6. Display screen; 7. Spring; 8. Sealing ring; 9. Battery; 10. Sampling nozzle; 11. Circuit board; 12. Partition; 13. Sealing cover; 14. Sealing gasket. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] Example:

[0025] like Figure 1-Figure 3 As shown, a rapid sampling and testing device adopts the structure of a glass syringe as a whole, including a barrel 1 and a piston 2. A sampling nozzle 10 is provided at the front end of the barrel 1, and the piston 2 is slidably assembled in the barrel 1. The cavity in the barrel 1 in front of the piston 2 is used to form a detection cavity. By pulling the piston 2 backward, the transformer oil to be sampled can enter the detection cavity through the sampling nozzle 10.

[0026] The barrel 1 is made of glass, and the main body of the piston 2 is made of glass. The outer peripheral surface of the piston 2 is in sliding sealing cooperation with the inner wall of the barrel 1. Existing syringes already have this material and structure.

[0027] The outer side of the cylinder 1 is also provided with scale lines, so as to facilitate the real-time understanding of the amount of oil extracted.

[0028] The rapid sampling and detection device of this embodiment is a rapid detection device for hydrogen in oil, so a hydrogen sensor 5 is provided at the front end of the piston 2, a circuit board 11 and a power supply are provided inside the piston 2, the power supply is connected to the circuit board 11, and the hydrogen sensor 5 is connected to the circuit board 11.

[0029] A sealing cover 13 is provided on the front side of the hydrogen sensor 5. The sealing cover 13 is provided with a through hole, so that the sensing part of the hydrogen sensor 5 is exposed so as to be in direct contact with the oil in the detection chamber. The sealing cover 13 is provided to prevent the oil from entering other positions at the rear of the piston 2 while ensuring that the hydrogen sensor 5 can contact the oil in the detection chamber. The sealing cover 13 can be fixed to the front end of the piston 2 body by gluing a glass cover sheet, and can be combined with a sealing gasket 14 to improve the sealing performance. A sealing ring 8 is provided between the sealing cover 13 and the front side of the hydrogen sensor 5. The sealing gasket 14 can also be understood as a sealing ring, which is embedded in the front end of the piston 2 body.

[0030] The hydrogen sensor 5 is of the palladium alloy thin film type, which utilizes the specific catalytic effect of metal Pd on H2, so that H2 molecules are decomposed into H atoms, which dissolve and diffuse into the Pd thin film lattice, thereby causing a change in the resistivity of the Pd metal film, thereby realizing the detection of hydrogen concentration.

[0031] A battery compartment is provided in the power supply, and the power supply adopts a battery 9. The front side of the battery compartment is used to place a circuit board 11, and the circuit board 11 after wiring can be placed therein by means of glue injection to achieve position fixation. The glue injection can be a liquid polyurethane composite, which forms a potting glue part after curing, and also relatively isolates the area where the circuit board 11 is located from the battery 9 compartment. A partition 12 is provided on one side of the battery 9 compartment, and the partition 12 can be passed through by cables for power supply and data transmission. The partition 12 has a conductive part for conductive contact with the positive electrode of the battery 9.

[0032] The rear end of the piston 2 is provided with an end cover 3, and a spring 7 is provided between the front side of the end cover 3 and the battery 9. The end cover 3 can be threadedly connected. After the end cover 3 is installed, the spring 7 can be used to press the battery 9, and the battery 9 is turned on and supplies power to the circuit board 11. The battery 9 can be easily replaced by opening the end cover 3.

[0033] A display screen 6 is provided on the rear side of the end cover 3, which is electrically connected to the circuit board 11. The display screen 6 can display the detected hydrogen concentration, so that the operator can understand the oil sample detection status on site. A switch 4 is also provided on the rear side of the end cover 3 next to the display screen 6, which is used to turn on and off the machine, that is, to control the opening and closing of the power supply.

[0034] When the rapid sampling detection device is used, a certain amount of transformer oil is extracted from the oil-filled electrical equipment. The electrical equipment may be an oil-immersed transformer, a reactor, etc. The electrical equipment to be tested generally has a sampling valve, and the sampling valve can be opened to sample. The sampling nozzle 10 is facing the sampling port, and the transformer oil can enter the detection chamber through the sampling nozzle 10 by pulling the piston 2 backward. After the extraction is completed, the sampling nozzle 10 is blocked with a rubber plug. The hydrogen sensor 5 directly detects and sends the detection signal to the signal processing module on the circuit board 11. The signal processing module processes and analyzes the collected signal, calculates the hydrogen content dissolved in the oil, and the hydrogen concentration is displayed on the display screen 6.

[0035] By using the rapid sampling detection device of the present invention, hydrogen in transformer oil can be detected anytime and anywhere, the hydrogen content can be determined, the operating status of oil-filled electrical equipment can be judged, or equipment failure can be diagnosed; the detection time of dissolved hydrogen in transformer oil can be shortened, and the detection efficiency can be improved.

[0036] In other embodiments, the rapid sampling and detection device may also use other types of sensors instead of hydrogen sensors, such as methane sensors, to detect the methane concentration in the oil. Of course, gas can also be sampled to detect the corresponding components in the gas. Therefore, the rapid sampling and detection device of the present invention has a good application prospect and is not limited to the field of sampling and analysis of transformer oil.

[0037] The present invention is not limited to the above-mentioned optimal implementation mode. Anyone can derive other various forms of products under the inspiration of the present invention. However, no matter what changes are made in the shape or structure, all technical solutions that are the same or similar to those of the present application fall within the protection scope of the present invention.

Claims

1. A rapid sampling and detection device, characterized in that: It includes a cylinder and a piston. A sampling nozzle is arranged at the front end of the cylinder. The piston is slidably assembled in the cylinder. A detection cavity is formed in the cylinder in front of the piston. A sensor is arranged at the front end of the piston. A circuit board and a power supply are arranged in the piston. The power supply is connected to the circuit board, and the sensor is connected to the circuit board.

2. The rapid sampling detection device according to claim 1, characterized in that: The cylinder is made of glass, and the main body of the piston is made of glass.

3. The rapid sampling detection device according to claim 1, characterized in that: A sealing cover is arranged at the front side of the sensor, and a through hole is arranged on the sealing cover so that the sensor is exposed and can directly contact with the oil in the detection cavity.

4. The rapid sampling detection device according to claim 1, characterized in that: A battery compartment is arranged in the power source, and the power source adopts a battery.

5. The rapid sampling detection device according to claim 4, characterized in that: An end cover is arranged at the rear end of the piston, and a spring is arranged between the front side of the end cover and the battery.

6. The rapid sampling detection device according to claim 4, characterized in that: An end cover is provided at the rear end of the piston, and a display screen is provided at the rear side of the end cover, which is electrically connected to the circuit board.

7. The rapid sampling detection device according to claim 1, characterized in that: The outer peripheral surface of the piston and the inner wall of the cylinder are in sliding sealing cooperation.

8. The rapid sampling detection device according to claim 1, characterized in that: The sensor is a hydrogen sensor.

9. The rapid sampling and detection device according to any one of claims 1 to 7, characterized in that: The sensor adopts a hydrogen sensor. When in use, a certain amount of transformer oil is extracted from oil-filled electrical equipment; the transformer oil in the detection cavity directly contacts the hydrogen sensor, and the signal processing module on the circuit board processes and analyzes the signal collected by the hydrogen sensor, calculates the hydrogen content dissolved in the oil, and displays it on the display screen.

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