Device for detecting dissolved gas and micro water in oil

Abstract

The utility model discloses a device for detecting dissolved gas and micro water in oil, which comprises an oil cup, a first air pump, a second air pump, a first air valve, a second air valve and a detection module, the oil cup is provided with an oil inlet connected with a transformer oil tank, the oil cup is connected with the first air pump through a first pipeline, and the first pipeline is provided with the first air valve for controlling pipeline communication. The first air pump is used for pumping air in the oil cup to realize vacuum, the oil cup is connected with the second air pump through a second pipeline, the second pipeline is provided with a second air valve 50 for controlling pipeline communication, and the second air pump is arranged between the oil cup and the detection module and is used for driving the air in the oil cup to move to the detection module for detection; a first liquid level sensor is arranged in the oil cup, the first liquid level sensor is used for monitoring the oil quantity in the oil cup so as to control the oil inlet to be communicated with an external oil source, the oil cup is further provided with a rotor located in the cup and a driving motor used for driving the rotor, and the rotor is used for driving oil in the oil cup to be stirred so as to generate gas.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer fault detection, in particular to a device for detecting dissolved gas and micro-water in oil. Background Art

[0002] In the power system, the transformer is a core component, and its safe and stable operation is of great significance to the power system and the national economy. During the long-term operation of the transformer, under the action of thermal and electrical phenomena, the oil tank is the outer shell of the transformer, and the inside is filled with transformer oil so that the iron core and winding are immersed in the oil. The oil plays the role of insulation and heat dissipation. If the impurities such as dissolved gas and trace water in the oil exceed a certain concentration, local discharge may occur, affecting the insulation strength of the transformer oil. The dissolved gases such as H2, CH3, C2H4, C2H2, CO and CO2 can be well judged by real-time monitoring and analysis of these gases dissolved in the oil. The early latent faults of oil-immersed power transformers can be well judged. The existing better is to detect the gas and trace water in the transformer oil through the device formed by photoacoustic spectroscopy, realize the online monitoring of the transformer, and timely reflect the safety hazards of the transformer.

[0003] The current detection device for dissolved gas and trace water in oil preferably needs to be degassed during the detection process. However, degassing requires specific components and is troublesome, resulting in low test efficiency. Therefore, a detection device for dissolved gas and trace water in oil that solves the above problems is needed. Utility Model Content

[0004] The main purpose of the present application is to provide a device for detecting dissolved gas and trace water in oil, aiming to solve the problems mentioned in the background technology.

[0005] The present application provides a detection device for dissolved gas and trace water in oil, comprising an oil cup, a first air pump, a second air pump, a first air valve, a second air valve and a detection module, wherein the oil cup is provided with an oil inlet connected to a transformer oil tank, the oil cup is connected to the first air pump via a first pipeline, and a first air valve connected to a control pipeline is provided on the first pipeline, the first air pump is used to extract gas in the oil cup to achieve vacuum, the oil cup is connected to the second air pump via a second pipeline, a second air valve connected to a control pipeline is provided on the second pipeline, and the second air pump is provided between the oil cup and the detection module, and the second air pump is used to drive the gas in the oil cup to move to the detection module for detection;

[0006] A first liquid level sensor is provided in the oil cup, and the first liquid level sensor is used to monitor the oil amount in the oil cup to control the connection between the oil inlet and the external oil source. The oil cup is also provided with a rotor located in the cup and a driving motor for driving the rotor. The rotor is used to drive the oil in the oil cup to stir to generate gas.

[0007] Furthermore, a filter is provided between the oil cup and the second air pump, and the filter is used to filter impurities in the gas.

[0008] Furthermore, it also includes a fourth air valve, one end of which is connected to the first air valve, one end of which is connected to the exhaust port of the detection module, and one end of which is connected to the first air pump.

[0009] Furthermore, it also includes a hydrogen chamber and an electrochemical hydrogen sensor located on the hydrogen chamber, one end of the hydrogen chamber is connected to the second air pump through a conduit, a third air valve for controlling the connection of the conduit is provided between the hydrogen chamber and the second air pump, and the other end of the hydrogen chamber is connected to the detection module through a conduit.

[0010] Furthermore, the oil cup is provided with an oil outlet connected to the transformer oil tank, and a second liquid level sensor is provided in the oil cup. The second liquid level sensor is used to monitor the oil amount in the oil cup to control the connection between the oil outlet and the external oil source.

[0011] In the utility model, a vacuum is drawn into the oil cup by a first air pump, and after the vacuum is drawn, the oil to be tested enters the oil cup through a pipeline, and then the rotor in the oil cup is driven by a driving motor to stir the oil to be tested in the oil cup, so that it is degassed under a negative pressure environment, and then the separated gas is moved to a detection module for gas detection, thereby realizing rapid and timely on-site monitoring, and adopting a purely physical photoacoustic spectroscopy analysis method without the need for consumables such as standard gas and carrier gas, with stable performance, high precision, stable and reliable performance, good repeatability, and a wide detection range. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0013] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0014] Figure 1 The utility model provides a device for detecting dissolved gas and trace water in oil in one embodiment.

[0015] The purpose, features and advantages of this application will be further described in conjunction with the embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0016] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the technical scheme in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work belong to the scope of protection of the utility model.

[0017] See also Figure 1 The present application provides a device 100 for detecting dissolved gas and trace water in oil, comprising an oil cup 10, a first air pump 20, a second air pump 30, a first air valve 40, a second air valve 50 and a detection module 60. The oil cup 10 is provided with an oil inlet 11 connected to the transformer oil tank. The oil cup 10 is connected to the first air pump 20 through a first pipeline, and a first air valve 40 connected to a control pipeline is provided on the first pipeline. The first air pump 20 is used to extract the gas in the oil cup 10 to achieve vacuum. The oil cup 10 is connected to the second air pump 30 through a second pipeline, and a second air valve 50 connected to a control pipeline is provided on the second pipeline. The second air pump 30 is provided between the oil cup 10 and the detection module 60. The second air pump 30 is used to drive the gas in the oil cup 10 to move to the detection module 60 for detection.

[0018] A first liquid level sensor is provided in the oil cup 10, and the first liquid level sensor is used to monitor the oil amount in the oil cup 10 to control the connection between the oil inlet 11 and the external oil source. The oil cup 10 is also provided with a rotor located in the cup and a driving motor for driving the rotor. The rotor is used to drive the oil in the oil cup 10 to stir to generate gas.

[0019] In the utility model, the oil cup 10 is evacuated by the first air pump 20. After the evacuation, the oil to be tested enters the oil cup 10 through the pipeline, and then the rotor in the oil cup 10 is driven by the driving motor to stir the oil to be tested in the oil cup 10, so that it is degassed under negative pressure environment, and then the separated gas is moved to the detection module 60 for gas detection, so that fast and timely on-site monitoring can be achieved, and no consumables are required. A purely physical photoacoustic spectroscopy analysis method is adopted, and no consumables such as standard gas and carrier gas are required. The performance is stable, the accuracy is high, stable and reliable, the repeatability is good, and the detection range is wide.

[0020] In the utility model, the device for detecting dissolved gas and trace water in oil 100 also includes a hydrogen chamber 70 and an electrochemical hydrogen sensor located on the hydrogen chamber 70. One end of the hydrogen chamber 70 is connected to the second air pump 30 through a conduit. A third air valve 80 for controlling the connection of the conduit is provided between the hydrogen chamber 70 and the second air pump 30. The other end of the hydrogen chamber 70 is connected to the detection module 60 through a conduit.

[0021] In the utility model, the dissolved gas and trace water detection device 100 in oil also includes a fourth air valve 90, one end of the fourth air valve 90 is connected to the first air valve 40, one end of the fourth air valve 90 is connected to the exhaust port of the detection module 60, and one end of the fourth air valve is connected to the first air pump 20.

[0022] In the utility model, the oil cup 10 is also provided with an oil outlet 12 connected to the transformer oil tank, and the oil cup 10 is also provided with a second liquid level sensor, which is used to monitor the oil amount in the oil cup 10 to control the connection between the oil outlet 12 and the external oil source.

[0023] In the present invention, the device for detecting dissolved gas and trace water in oil 100 is further provided with a filter 101 located between the oil cup 10 and the second air pump 30 , and the filter 101 is used to filter impurities in the gas.

[0024] The above are only preferred embodiments of the present application, and are not intended to limit the patent scope of the present application. Any equivalent structure or equivalent process transformation made using the contents of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent processing scope of the present application.

Claims

1. A device for detecting dissolved gas and trace water in oil, characterized in that: It includes an oil cup, a first air pump, a second air pump, a first air valve, a second air valve and a detection module, the oil cup is provided with an oil inlet connected to the transformer oil tank, the oil cup is connected to the first air pump through a first pipeline, and a first air valve connected to a control pipeline is provided on the first pipeline, the first air pump is used to extract the gas in the oil cup to achieve vacuum, the oil cup is connected to the second air pump through a second pipeline, a second air valve connected to a control pipeline is provided on the second pipeline, and the second air pump is provided between the oil cup and the detection module, and the second air pump is used to drive the gas in the oil cup to move to the detection module for detection; A first liquid level sensor is provided in the oil cup, and the first liquid level sensor is used to monitor the oil amount in the oil cup to control the connection between the oil inlet and the external oil source. The oil cup is also provided with a rotor located in the cup and a driving motor for driving the rotor. The rotor is used to drive the oil in the oil cup to stir to generate gas.

2. The device for detecting dissolved gas and trace water in oil according to claim 1, characterized in that: A filter is also provided between the oil cup and the second air pump, and the filter is used to filter impurities in the gas.

3. The device for detecting dissolved gas and trace water in oil according to claim 1, characterized in that: It also includes a hydrogen chamber and an electrochemical hydrogen sensor located on the hydrogen chamber, one end of the hydrogen chamber is connected to the second air pump through a conduit, a third air valve for controlling the communication of the conduit is provided between the hydrogen chamber and the second air pump, and the other end of the hydrogen chamber is connected to the detection module through a conduit.

4. The device for detecting dissolved gas and trace water in oil according to claim 1, characterized in that: The oil cup is also provided with an oil outlet connected to the transformer oil tank. The oil cup is also provided with a second liquid level sensor, which is used to monitor the oil volume in the oil cup to control the connection between the oil outlet and the external oil source.

5. The device for detecting dissolved gas and trace water in oil according to claim 1, characterized in that: It also includes a fourth air valve, one end of which is connected to the first air valve, one end of which is connected to the exhaust port of the detection module, and one end of which is connected to the first air pump.

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