A gas source generator

Abstract

The utility model provides a kind of gas source generator, including gas source generator ontology, for connecting oil chromatogram real-time monitoring system, to connect its gas supply, ontology includes control unit and respectively with the air compression unit, air filter unit, air drying unit and power supply of control unit connection.This application generator can replace the steel bottle filling gas currently used, can all-weather aging in oil dissolved gas, improve the detection stability of oil dissolved gas online monitoring device;And this application can automatically detect gas pressure in gas storage tank in real time, and after comparing with pre-value, automatically start-stop the supplement of gas in gas storage tank;Response host computer monitoring software calls gas pressure value in gas storage tank;Real-time in situ end shows gas pressure value in gas storage tank and device output pressure value.The compression, filtering and drying of environmental gas are realized.

Description

Technical Field

[0001] This utility model relates to the field of gas source generator technology, and more specifically, to a gas source generator. Background Technology

[0002] Most online monitoring systems for dissolved gases in transformer oil employ vacuum degassing and chromatographic separation for detection. This system is a continuously operating, closed-loop system with a carrier gas supply. The system has high requirements for gas purity; the carrier gas and hydrogen must be at least 99.99% pure, and the air used must be purified, with the air generator requiring dust, oil, and water removal functions. Using substandard, low-purity gases may cause a series of problems, including sample distortion or disappearance, column failure, false peaks, and negative impacts on column retention characteristics.

[0003] Currently, the online dissolved gas monitoring device in oil uses cylinder-filled gas as the carrier gas. Although it is relatively simple to use, it is a consumable. Personnel need to go to the site to replace the used carrier gas, which is more labor-intensive and resource-intensive. In addition, the number of times the online dissolved gas monitoring device can be operated is limited by the amount of carrier gas in a single cylinder. When replacing the gas, the system needs to be stopped, which affects the continuity of system operation.

[0004] In view of this, the applicant hereby submits this application after studying the existing technology. Utility Model Content

[0005] This invention provides a gas generator, which aims to improve at least one of the above-mentioned technical problems.

[0006] To solve the above-mentioned technical problems, this utility model provides a gas source generator, including a gas source generator body. The body is used to connect to an oil chromatography real-time monitoring system for supplying gas. The body includes a control unit and an air compression unit, an air filtration unit, an air drying unit, and a power supply, all connected to the control unit. The input end of the air compression unit is connected to the outside environment for inputting and compressing air. The input end of the air filtration unit is connected to the output end of the air compression unit, and the output end of the air filtration unit is connected to the air drying unit. The output end of the air drying unit is connected to a gas storage tank. A pressure reducing valve is provided between the outlet end of the gas storage tank and the outlet end of the body. The outlet end of the gas storage tank is also connected to the input end of the air compression unit via a solenoid valve. The device also includes a first one-way valve connected between the air drying unit and the gas storage tank, and a second one-way valve connected between the solenoid valve and the air compression unit. The air drying unit consists of two double-barreled units filled with desiccant.

[0007] As a further optimization, the desiccant is a synthetic zeolite molecular sieve.

[0008] As a further optimization, a silencer is provided between the air compression unit and the outside environment.

[0009] As a further optimization, a vent valve is provided between the air compression unit and the air filter unit.

[0010] As a further optimization, a pressure gauge is provided at the air outlet of the main body.

[0011] As a further optimization, the control unit uses an STM32 chip as the core of the control board.

[0012] As a further optimization, a pressure detection unit is connected to the output end of the gas storage tank, and the pressure detection unit is electrically connected to the control unit.

[0013] By adopting the above technical solution, the present invention can achieve the following technical effects:

[0014] This application provides a gas generator, including a generator body for connecting to an oil chromatography real-time monitoring system for gas supply. The generator body includes a control unit and an air compression unit, an air filtration unit, an air drying unit, and a power supply, all connected to the control unit. This generator can replace the currently used cylinder-filled gas, enabling all-weather aging of dissolved gases in oil and improving the detection stability of online dissolved gas monitoring devices. Furthermore, this application can automatically detect the gas pressure in the storage tank in real time, compare it with a preset value, and automatically start and stop replenishing the gas in the storage tank; it responds to requests for gas pressure values ​​from the host computer monitoring software; and it displays the gas pressure values ​​in the storage tank and the device's output pressure values ​​locally in real time. This achieves the compression, filtration, and drying of ambient gases. Attached Figure Description

[0015] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the system structure of a gas source generator according to the present invention;

[0017] Figure 2 This is a schematic diagram of the structure of a gas source generator according to the present invention;

[0018] The following are labeled in the diagram: 1. Main body; 2. Air compression unit; 3. Air filter unit; 4. Air drying unit; 5. Power supply; 6. Control unit; 7. Air tank; 8. Pressure reducing valve; 9. First check valve; 10. Second check valve; 11. Solenoid valve; 12. Silencer; 13. Air release valve; 14. Pressure gauge; 15. Pressure detection unit. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this utility model, not all of them. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Therefore, the following detailed description of the embodiments of this utility model provided in the accompanying drawings is not intended to limit the scope of the claimed utility model, but merely represents selected embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0020] Depend on Figures 1 to 2 As shown, this embodiment of the present invention provides a gas generator, including a gas generator body 1. The body 1 is used to connect to an oil chromatography real-time monitoring system (not shown in the figure) for gas supply. The body 1 includes a control unit 6 and an air compression unit 2, an air filter unit 3, an air drying unit 4, and a power supply 5, all connected to the control unit 6. Figure 1 The system structure is as follows: the input end of the air compression unit 2 is connected to the outside and is used for inputting and compressing air; the input end of the air filter unit 3 is connected to the output end of the air compression unit 2, and the output end of the air filter unit 3 is connected to the air drying unit 4. The output end of the air drying unit 4 is connected to the air storage tank 7. The air storage tank 7 has functions such as compressing, storing and releasing gas. In order to ensure the safety of the air storage tank 7, it is equipped with safety devices such as safety valves and pressure gauges. The safety valve can automatically release excess gas when the pressure inside the tank exceeds the set value to prevent overpressure accidents. The pressure gauge is used to monitor the pressure status inside the air storage tank 7 so that timely measures can be taken to adjust it. Details are omitted here.

[0021] Furthermore, a pressure reducing valve 8 is installed between the outlet end of the gas storage tank 7 and the outlet end of the main body 1. This valve serves a safety protection function; when the internal pressure abnormally increases, it quickly responds and releases excess pressure, preventing internal malfunctions or damage due to overpressure. This is crucial for ensuring the safe operation of the generator and monitoring system. The outlet end of the gas storage tank 7 is also connected to the input end of the air compression unit 2 via a solenoid valve 11. The solenoid valve 11 is a two-way solenoid valve, controlling the opening and closing of the valve body through electromagnetic force to precisely regulate and control the gas flow. The system also includes a first check valve 9 connected between the air drying unit 4 and the gas storage tank 7, and a second check valve 10 connected between the solenoid valve 11 and the air compression unit 2. These check valves prevent backflow of the medium and protect the air compression unit 2 and other equipment in the system from damage. They also help ensure the accuracy and stability of the internal pressure detection results. The air is drawn in by the air compression unit 2, which is then compressed and guided into the air filter unit 3 inside the main body 1. After the air filter unit 3 removes liquid water and larger impurities (oil, moisture, and powder, etc.) from the air, it is dried by the air drying unit 4. Finally, a carrier gas with a hydrogen concentration of more than 99.99% is obtained to supply the oil chromatography real-time monitoring system and ensure its correct operation and monitoring function.

[0022] In this embodiment, the air filter of the air filtration unit 3 has oblique teeth similar to fan blades installed inside, which force the high-speed flowing compressed air to generate a strong rotation along the tangential direction of the teeth. Liquid water and larger impurities mixed in the air are separated under the action of strong centrifugal force and thrown onto the wall of the storage container inside the filter, flowing to the bottom of the storage container. The storage container is equipped with an umbrella-shaped baffle to prevent the high-speed rotating airflow from sucking up the liquid water at the bottom of the storage container. The liquid water collected at the bottom of the container is automatically discharged when the compressed air process stops. This is prior art and will not be described in detail here.

[0023] The control unit 6 uses an STM32 chip as the core of the control board. The main core component is the STM32F103RFT6, which integrates several 12-bit AD converters to perform analog-to-digital conversion on the parameters to be detected. Several UARTs integrated into the chip are used to implement RS485 and other functions via external circuitry. Several GPIO ports of the chip are used for related logic control. An ARM processor is used to implement intelligent logic control of the device, achieving functions such as real-time monitoring, intelligent protection, and pressure display.

[0024] Furthermore, a pressure detection unit 15 is connected to the output end of the gas storage tank 7. The pressure detection unit 15 is mainly used to detect the pressure inside the gas storage tank 7, and it is electrically connected to the control unit 6. It senses changes in gas pressure through a pressure sensor, converts them into electrical signals, and outputs them to the control unit 6 for signal processing, providing display and alarm protection functions to achieve real-time monitoring and control of gas pressure.

[0025] Preferably, in this embodiment, the air drying unit 4 consists of two double-tube dryers filled with desiccant. The two tubes can alternately turn the airflow on and off, performing drying alternately. Furthermore, the desiccant is a synthetic zeolite molecular sieve, which adsorbs and dries the gas. Simultaneously, air output from the gas storage tank 7 via the solenoid valve 11, and then output as uncooled high-temperature gas via the air compression unit 2, regenerates the drying effect. By utilizing the high-pressure adsorption and low-pressure desorption characteristics of synthetic zeolite molecular sieves for moisture, if the attraction between the solid surface and gas molecules is greater than the attraction between gas molecules, the gas will be concentrated on the adsorbent surface; conversely, when the partial pressure or relative humidity of the gas phase decreases, the gas will desorb. This process is a physical adsorption process, a reversible phenomenon caused by the adsorption force between the adsorbent and adsorbate molecules, also known as van der Waals adsorption force. Thus, the double-tube dryers not only perform alternating drying but also regeneration, allowing the airflow to continuously contact the drying desiccant to achieve the purpose of dehumidification and drying. In this embodiment, since the air's capacity to hold water vapor is inversely proportional to its pressure, a portion of the dried air expands under reduced pressure to atmospheric pressure. This pressure change makes the expanded air even drier. It then flows through the desiccant layer requiring regeneration within the unconnected double-tube dryer. The dried regeneration gas draws out the moisture from the desiccant and carries it out of the dryer, achieving dehumidification. This method typically consumes 15% compressed air, enabling alternating drying and regeneration. This allows the gas generator 1 to continuously and stably supply the oil chromatography real-time monitoring system with gas meeting its required purity and pressure requirements.

[0026] Preferably, a silencer 12 is provided between the air compression unit 2 and the outside environment. In this embodiment, the air compression unit 2 is an air compressor. Since it generates noise when it draws in air, the silencer 12 is used to reduce noise. The silencer 12 reduces noise by using alternating through holes inside, which changes the airflow direction. This causes the airflow to pass through the flow cross-section of the contracting and expanding interface multiple times, dividing the airflow into many small branches and flowing along the uneven surface. This reduces the pressure fluctuation of the exhaust gas and consumes the energy of the exhaust gas, thereby achieving the effect of reducing noise.

[0027] Preferably, a vent valve 13 is provided between the air compression unit 2 and the air filter unit 3. By reasonably setting the threshold value of the vent valve 13, precise control of the pressure within the generator system can be achieved, thereby ensuring the accuracy and stability of the monitoring results.

[0028] Preferably, a pressure gauge 14 is provided at the outlet of the main body 1. Installing the pressure gauge 14 at the output port of the generator connected to the monitoring system allows it to serve as an important tool for fault diagnosis when the monitoring system malfunctions. By observing changes in the gauge reading, operators can initially determine the cause and location of the fault, thereby taking targeted maintenance measures and improving the efficiency of fault diagnosis and repair.

[0029] In summary, the gas generator of this invention includes air compression, air filtration, air drying, and logic control. Through logic control functions, the air compressor compresses the air, filters it by removing liquid water and larger impurities, and further dries and dehumidifies it. This, combined with the gas storage tank 7, stores the gas, enabling a continuous and stable output of high-purity gas to supply the oil chromatography real-time monitoring system. This gas generator can replace the commonly used steel cylinder gas filling, providing a stable supply of high-purity gas around the clock to ensure the stability of the monitoring system.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A gas generator, comprising a gas generator body, the body being used to connect to an oil chromatography real-time monitoring system for supplying gas to it, characterized in that, The main body includes a control unit and an air compression unit, an air filter unit, an air drying unit, and a power supply, all connected to the control unit. The input end of the air compression unit is connected to the outside and is used for inputting and compressing air. The input terminal of the air filtration unit is connected to the output terminal of the air compression unit, and the output terminal of the air filtration unit is connected to the air drying unit. An air storage tank is connected to the output terminal of the air drying unit, and a pressure reducing valve is installed between the outlet terminal of the air storage tank and the air outlet terminal of the main body. The outlet terminal of the air storage tank is also connected to the input terminal of the air compression unit via a solenoid valve. The system also includes a first one-way valve connected between the air drying unit and the air storage tank, and a second one-way valve connected between the solenoid valve and the air compression unit. The air drying unit consists of two double-barreled units filled with desiccant. The control unit uses an STM32 chip as the core of the control board and utilizes several 12-bit AD converters integrated into the STM32 chip to perform analog-to-digital conversion on the parameters to be detected. Several UARTs integrated into the STM32 chip are used to implement RS485 functionality via external circuitry. Several GPIO ports of the STM32 chip are used for related logic control. An ARM processor is used to implement intelligent logic control of the device, enabling real-time monitoring, intelligent protection, and pressure display functions.

2. A gas generator according to claim 1, characterized in that... The desiccant is a synthetic zeolite molecular sieve.

3. A gas generator according to claim 1, characterized in that... A silencer is installed between the air compression unit and the outside environment.

4. A gas generator according to claim 1, characterized in that... An air release valve is provided between the air compression unit and the air filter unit.

5. A gas generator according to claim 1, characterized in that... The air outlet of the main body is equipped with a pressure gauge.

6. A gas generator according to claim 1, characterized in that... The control unit uses an STM32 chip as the core of the control board.

7. A gas generator according to claim 1, characterized in that... The output end of the gas storage tank is connected to a pressure detection unit, and the pressure detection unit is electrically connected to the control unit.

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