Gas condensing device for oil chromatographic analysis

Abstract

The utility model discloses a gas condensing device for oil chromatographic analysis, which comprises a condensing bin, a gas outlet and a high-pressure gas injection port are arranged on the condensing bin, and a high-pressure gas expansion space is formed in an area enclosed by the condensing bin; the monitoring gas pipeline penetrates through the condensation bin; and the high-pressure gas pipeline is communicated with the high-pressure gas injection port. High-pressure gas is input into the condensation bin, monitoring gas in the monitoring gas pipeline located in the condensation bin is cooled through the temperature reduction effect when the high-pressure gas expands in the condensation bin, oil-gas liquefaction is achieved, oil-gas and characteristic fault gas are separated, and the detection result of oil chromatographic analysis is accurate.

Description

Technical Field

[0001] The utility model belongs to the technical field of transformer fault monitoring, and in particular relates to a gas condensation device used for oil chromatography analysis. Background Art

[0002] In a high temperature and high voltage environment, if a fault occurs inside the transformer, such as heat release or discharge, the transformer oil will decompose and crack to generate hydrogen, methane, ethane and other gases that dissolve in the transformer oil. The composition and content of these gases in the transformer oil indicate the type of transformer fault, so these gases are also called characteristic fault gases.

[0003] Transformer oil chromatography testing is one of the most important transformer maintenance technologies. It can timely and accurately detect the content and composition of various substances in the insulating oil inside the transformer, thereby evaluating the internal condition of the transformer and determining whether the transformer has a risk of failure.

[0004] First, oil and gas separation is required. During the oil and gas separation process, it is inevitable that some transformer oil vapor (referred to as oil and gas) will mix into the monitoring gas, affecting the monitoring data, causing inaccurate monitoring results and even generating erroneous reports.

[0005] At present, the main method is to increase the length of the gas pipeline, so that the gas can cool naturally when passing through the longer pipeline, and the oil and gas will liquefy, adhere to the pipe wall and then flow back to the transformer. However, since it is naturally cooled to the atmospheric temperature, it is difficult for the oil and gas to be completely liquefied, especially in summer or when the ambient temperature is high. Therefore, the oil and gas will still mix with the monitoring gas, resulting in inaccurate detection. Summary of the invention

[0006] The utility model aims to provide a gas condensing device for oil chromatography analysis, so as to solve the problem that the oil gas cannot be fully liquefied, resulting in inaccurate oil chromatography detection results.

[0007] The technical solution is as follows:

[0008] The utility model of the gas condensation device for oil chromatography analysis comprises:

[0009] A condensation chamber, wherein a gas outflow port and a high-pressure gas injection port are provided on the condensation chamber, and an area surrounded by the condensation chamber forms an expansion space for the high-pressure gas;

[0010] a monitoring gas pipeline, wherein the monitoring gas pipeline passes through the condensation chamber;

[0011] A high-pressure gas pipeline is connected to the high-pressure gas injection port.

[0012] In one embodiment, the condensation chamber is an insulating chamber made of insulating material.

[0013] In one of the embodiments, the monitoring gas pipeline located in the condensation chamber is a spiral pipeline.

[0014] In one of the embodiments, the condensation bin is cylindrical, and the axial direction of the condensation bin is consistent with the extension direction of the spiral pipe.

[0015] In one of the embodiments, the radial cross-sectional area of ​​the high-pressure gas injection port gradually decreases in a direction toward the interior of the condensation chamber.

[0016] In one of the embodiments, the high-pressure gas injection port is funnel-shaped, including a funnel mouth and a plug, the funnel mouth faces the outside of the condensation bin, and the plug is connected to the inside of the condensation bin.

[0017] In one embodiment, the monitoring gas pipeline is a metal pipeline.

[0018] In one of the embodiments, the high-pressure gas injection port is disposed on a side opposite to the gas outflow port.

[0019] In one of the embodiments, the condensation bin is provided with a penetration port for the monitoring gas pipeline to penetrate into the condensation bin, and the penetration port and the high-pressure gas injection port are located on the same side of the condensation bin.

[0020] In one embodiment, the condensation chamber is a semi-enclosed chamber, and the open end of the condensation chamber forms the gas outlet.

[0021] The technical solution provided by the utility model has the following advantages and effects:

[0022] By inputting high-pressure gas into the condensation chamber and utilizing the temperature reduction effect of the high-pressure gas when it expands in the condensation chamber to cool the monitoring gas in the monitoring gas pipeline in the condensation chamber, oil and gas liquefaction is achieved, and oil and gas and characteristic fault gas are separated, so that the detection results of oil chromatography analysis are accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional diagram of a gas condensation device provided in this embodiment;

[0024] Figure 2 yes Figure 1 A cross-sectional view of a gas condensing device according to an embodiment;

[0025] Figure 3 is a three-dimensional diagram of the gas pipeline structure of another gas condensation device provided in this embodiment;

[0026] Figure 4 yes Figure 3 A three-dimensional diagram of the condensation chamber of the embodiment;

[0027] Figure 5 yes Figure 2 A magnified image of area A.

[0028] Description of reference numerals:

[0029] 10. Condensation chamber, 11. Gas flow outlet, 12. High-pressure gas injection port, 12a. Funnel mouth, 12b. Insertion port, 13. Passage port, 14. End cover, 20. Monitoring gas pipeline, 21. Spiral pipeline, 30. High-pressure gas pipeline. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present invention, specific embodiments of the present invention will be described in more detail below with reference to the accompanying drawings.

[0031] Unless otherwise specified or defined, the "first, second..." used in this article is merely used to distinguish names and does not represent a specific quantity or order.

[0032] Unless specifically stated or defined otherwise, the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0033] It should be noted that, in this document, “fixed to” or “connected to” may mean directly fixing or connecting to an element, or indirectly fixing or connecting to an element.

[0034] When conducting transformer oil chromatography testing, oil and gas separation is first required to separate the characteristic fault gas in the oil for gas chromatography analysis. In the oil and gas separation process, oil and gas will inevitably be mixed into the monitoring gas, resulting in inaccurate oil chromatography test results. The current method of naturally cooling the oil and gas by extending the flow of the monitoring gas through the pipeline is difficult to liquefy the oil and gas, especially in summer or when the ambient temperature is high.

[0035] In view of the above problems, the utility model utilizes the physical principle of air expansion and heat absorption, designs a limited space to allow high-pressure gas to expand rapidly to absorb surrounding heat, cool the monitoring gas pipeline placed therein, and then reduce the temperature of the oil and gas in the monitoring gas, liquefy the oil and gas, separate the oil and gas from the characteristic fault gas, and make the results of oil chromatography analysis more accurate.

[0036] like Figure 1 The gas condensation device of this embodiment mainly includes: a condensation chamber 10, a monitoring gas pipeline 20 and a high-pressure gas pipeline 30. The monitoring gas pipeline 20 is a pipeline for monitoring gas to flow through, wherein the monitoring gas is gas extracted from transformer oil, and the gas is a mixture of characteristic fault gas and oil gas; the high-pressure gas pipeline 30 is a pipeline for conveying high-pressure gas; the condensation chamber 10 is used to liquefy the oil and gas in the monitoring gas pipeline 20.

[0037] Specifically, the shape of the condensation chamber 10 is cylindrical. Figure 2 As shown, one end is open and the other end is closed, forming a semi-closed bin body. One end of the condensation bin 10 is closed by an end cover 14, and a high-pressure gas injection port 12 is provided on the end cover 14, which is used to input the high-pressure gas in the high-pressure gas pipeline 30 into the condensation bin 10. The open end of the condensation bin 10 forms a gas outflow port 11. The area surrounded by the condensation bin 10 forms an expansion space for the high-pressure gas. The high-pressure gas pipeline 30 is connected to the high-pressure gas injection port 12, and the high-pressure gas in the high-pressure gas pipeline 30 flows into the condensation bin 10 from the high-pressure gas injection port 12. When the high-pressure gas flows into the condensation bin 10, it will expand rapidly in the expansion space and absorb the surrounding heat. There is no limitation on the connection method between the end cover 14 and the condensation bin 10. In one example, the end cover 14 and the condensation bin 10 are integrally manufactured; in one example, such as Figure 3 , Figure 4 As shown, the end cover 14, the monitoring gas pipeline 20 and / or the high-pressure gas pipeline 30 are integrally manufactured, the condensation bin 10 is a sleeve with openings at both ends, one end of the condensation bin 10 is fixedly connected to the end cover 14 by means of screwing or snapping, and the end cover 14 forms a closed end of the condensation bin 10.

[0038] The monitoring gas pipeline 20 enters from one end of the condensation chamber 10 and exits from the other end. There is no restriction on the positions of the inlet and outlet, and they can be designed accordingly according to the shape of the condensation chamber 10 based on the principles of fluid mechanics. When the high-pressure gas expands, it absorbs the heat of the monitoring gas pipeline 20 in the condensation chamber 10, so that the temperature of the monitoring gas pipeline 20 decreases. As the high-pressure gas continues to flow in and expand, the temperature of the monitoring gas pipeline 20 continues to decrease. When the condensation temperature of the oil and gas is reached, the oil and gas are liquefied and separated from the monitoring gas, so that the monitoring gas is a characteristic fault gas and no longer contains oil and gas. The results of the oil chromatography analysis can be more accurate.

[0039] It should be noted that the shape of the condensation chamber 10 is not limited and can be designed accordingly according to the direction of the monitoring gas pipeline 20 .

[0040] In one example, both ends of the condensation chamber 10 are closed, and the gas outlet 11 is a through hole or channel opened on the closed end.

[0041] In order to enhance the heat absorption effect of the expansion of high-pressure gas on the monitoring gas pipeline 20, in one example, the condensation chamber 10 is an insulated chamber, made of insulation material, which reduces the heat exchange between the inside of the condensation chamber 10 and the outside world, and improves the cooling efficiency of the monitoring gas pipeline 20. In one example, the inside of the condensation chamber 10 is coated with insulation material to form an insulation layer, which also reduces the heat exchange between the inside of the condensation chamber 10 and the outside world, and improves the cooling efficiency.

[0042] In one example, if Figure 3 As shown, the monitoring gas pipeline 20 in the condensation chamber 10 is made into a spiral pipeline 21 to extend the path length of the monitoring gas pipeline 20 in the condensation chamber 10 and improve the cooling efficiency. When the condensation chamber 10 is cylindrical, the axial direction of the condensation chamber 10 is preferably consistent with the extension direction of the spiral pipeline 21, so that the high-pressure gas is blown in the extension direction of the spiral pipeline 21, and the cooling efficiency is higher.

[0043] In order to make the volume expansion effect of the high-pressure gas stronger, in one example, the radial cross-sectional area of ​​the high-pressure gas injection port 12 is gradually reduced along the direction toward the inside of the condensation chamber 10, which is equivalent to the high-pressure gas injection port 12 being a channel with a gradually decreasing diameter, so that the gas volume of the high-pressure gas in the high-pressure gas pipeline 30 is further reduced when it flows into the condensation chamber 10, so that the volume ratio before and after expansion is larger, thereby enhancing the expansion effect. In this embodiment, Figure 5 As shown, the high-pressure gas injection port 12 is funnel-shaped, including a funnel mouth 12a and a cannula 12b, the funnel mouth 12a faces the outside of the condensation bin 10, and is connected to the high-pressure gas pipeline 30, and the cannula 12b is connected to the inside of the condensation bin 10. The tail of the high-pressure gas pipeline 30 is correspondingly designed to be needle-shaped. There is no restriction on the connection method between the high-pressure gas pipeline 30 and the high-pressure gas injection port 12, and any existing fixed connection method, such as interference fit, can be adopted. Preferably, the high-pressure gas pipeline 30 and the end cover 14 are made as one body, so that the high-pressure gas pipeline 30 and the high-pressure gas injection port 12 are integrated, thereby improving the reliability and safety when the high-pressure gas is introduced.

[0044] In one example, the monitoring gas pipeline 20 is a metal pipeline to improve heat exchange efficiency.

[0045] Preferably, the high-pressure gas injection port 12 is arranged on a side opposite to the gas outflow port 11, so that the gas flow effect is better and the flow speed is faster, thereby improving the heat exchange efficiency.

[0046] In this embodiment, the penetration port 13 on the condensation bin 10 through which the monitoring gas pipeline 20 penetrates into the condensation bin 10 and the high-pressure gas injection port 12 are located on the same side of the condensation bin 10, and the penetration port 13 is adjacent to the high-pressure gas injection port 12, so that the heat exchange of the monitoring gas pipeline 20 is more sufficient and the oil and gas liquefaction effect is better.

[0047] The above embodiments are not exhaustive enumerations based on the present invention, and there may be multiple other implementations not listed. Any replacement and improvement made without violating the concept of the present invention shall fall within the protection scope of the present invention.

Claims

1. A gas condensation device for oil chromatography analysis, characterized in that: include: A condensation chamber, wherein a gas outflow port and a high-pressure gas injection port are provided on the condensation chamber, and an area surrounded by the condensation chamber forms an expansion space for the high-pressure gas; a monitoring gas pipeline, wherein the monitoring gas pipeline passes through the condensation chamber; A high-pressure gas pipeline is connected to the high-pressure gas injection port.

2. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The condensation chamber is a heat-insulating chamber made of heat-insulating material.

3. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The monitoring gas pipeline located in the condensation chamber is a spiral pipeline.

4. The gas condensation device for oil chromatography analysis according to claim 3, characterized in that: The condensation bin is cylindrical, and the axial direction of the condensation bin is consistent with the extension direction of the spiral pipe.

5. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The radial cross-sectional area of ​​the high-pressure gas injection port gradually decreases in a direction toward the interior of the condensation chamber.

6. The gas condensation device for oil chromatography analysis according to claim 5, characterized in that: The high-pressure gas injection port is funnel-shaped, including a funnel mouth and a plug, the funnel mouth faces the outside of the condensation bin, and the plug is connected to the inside of the condensation bin.

7. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The monitoring gas pipeline is a metal pipeline.

8. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The high-pressure gas injection port is arranged on a side opposite to the gas outflow port.

9. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The condensation bin is provided with a penetration port for the monitoring gas pipeline to penetrate into the condensation bin, and the penetration port and the high-pressure gas injection port are located on the same side of the condensation bin.

10. The gas condensation device for oil chromatography analysis according to claim 1, characterized in that: The condensation chamber is a semi-enclosed chamber body, and the open end of the condensation chamber forms the gas outflow outlet.

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