Transformer oil spectrum analysis degassing measuring device based on double-gas-chamber headspace degassing

Abstract

The utility model discloses a transformer oil spectrum analysis degassing measuring device based on double-gas-chamber headspace degassing, which is characterized in that a gas outlet end of a gas chamber is communicated with a gas extraction end of a gas pump through a pipeline, a first gas inlet end of a degassing chamber is communicated with a gas outlet end of an oil pool through a pipeline, and the degassing chamber is provided with a first electronic valve; the second gas inlet end of the degassing chamber is communicated with the gas outlet end of the gas collecting chamber through a pipeline and is provided with a second electronic valve; the air outlet end of the air pump is communicated with the exhaust pipe through a pipeline and is provided with a second three-way electronic valve, and the second three-way electronic valve is further communicated with the air inlet end of the oil pool through a pipeline and is provided with a first three-way electronic valve; the first three-way electronic valve is also communicated with the gas inlet end of the gas collection chamber through a pipeline; and a degassing loop and a measuring loop are formed among the oil pool, the degassing chamber, the gas collecting chamber and the gas pump. The continuous bubbling device has the advantages of being simple in structure, high in working efficiency and capable of achieving continuous bubbling, shortening testing time and reducing pollution.

Description

Technical Field

[0001] The utility model relates to the technical field of power transformer monitoring, in particular to a transformer oil spectrum analysis degassing measuring device based on double-chamber headspace degassing. Background Art

[0002] Power transformers are one of the important components of the power system. Their safe and stable operation ensures the reliability and stability of power supply. Therefore, it is necessary to monitor the operating status of the transformer to prevent major economic losses and even safety accidents. At present, large transformers in power systems mostly use oil-immersed transformers. During operation, due to overheating, discharge, oxidation, etc., fault characteristic gases will be generated in the transformer oil. Analysis of dissolved gases in transformer oil has become one of the main methods for transformer fault diagnosis.

[0003] Practice has proved that the gas testing technology in transformer oil can effectively predict potential faults inside the transformer. Therefore, the online monitoring device for gas in transformer oil can automatically analyze the content of various components of dissolved gas in the oil online, solving the problems of long detection cycle, complex operation, high time and cost of traditional oil testing methods, and has been widely used in power systems.

[0004] The online monitoring device for gas in transformer oil needs to separate the oil and gas in transformer oil first, and then analyze the gas concentration of the separated gas. Traditional oil and gas separation methods include: membrane degassing method based on polymer degassing membrane, vacuum degassing method and headspace degassing method, but each method has certain technical problems, as follows:

[0005] 1. Membrane degassing is a method of separating gas and liquid using a semipermeable membrane. The semipermeable membrane has selective permeability, which allows gas to pass through and prevents the flow of liquid. The membrane degassing method is suitable for liquids with small gas molecules and high solubility. By placing the liquid on one side of the semipermeable membrane, the gas can escape through the membrane, thereby achieving the purpose of degassing. However, there are technical problems: 1. The degassing time is too long, and the degassing time of CO and CO2 is more than 4 hours; 2. Long-term immersion causes the membrane permeability to change, resulting in measurement errors.

[0006] Second, the vacuum degassing method uses the diffusion properties of gas under negative pressure environment, and reduces the environmental pressure to make the gas molecules in the transformer oil diffuse from the high concentration area to the low concentration area, thereby achieving the purpose of degassing. However, there are technical problems: 1. Only a small part of the degassed gas can be used as the injection gas, and there is still the problem of gas re-dissolution, which ultimately leads to a very low gas utilization rate; 2. This method has a complex structure, high production cost, high failure rate, and poor actual application effect.

[0007] 3. The headspace degassing method uses an air pump to create a negative pressure above the oil pool, and at the same time pumps the air in the small air chamber into the oil pool through the oil pool air inlet to displace the gas in the transformer oil in the oil pool for subsequent monitoring. However, there are technical problems: 1. Bubbling cannot be continuous, otherwise a large amount of oil mist will enter the air chamber, causing pollution, and the degassing time is long. Bubbling often requires dozens of times for one measurement; 2. There is no special gas cleaning circuit, and oil mist and residual gas are likely to stay in the pipeline, affecting the measurement.

[0008] Therefore, how to invent a transformer oil spectral analysis degassing measurement device that can achieve continuous bubbling and shorten the test time; prevent the air in the gas collecting chamber from directly convecting with the air above the oil pool and polluting the filtering device; and have a special gas path cleaning circuit to purge the gas in the pipeline has become a technical problem that needs to be solved urgently. Utility Model Content

[0009] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a transformer oil spectral analysis degassing measuring device based on double air chamber headspace degassing, which has a simple structure, high working efficiency, can realize continuous bubbling, shorten the test time, and can reduce pollution.

[0010] In order to solve the above technical problems, the utility model adopts the following technical solutions:

[0011] A transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing is used in connection with an oil pool, comprising a central control unit, a degassing chamber, a gas collecting chamber, an air pump, a first electronic valve, a second electronic valve, a first three-way electronic valve, a second three-way electronic valve, an exhaust pipe and a plurality of connecting pipes; the gas outlet end of the degassing chamber is connected to the gas extraction end of the air pump through a pipe, the first gas inlet end of the degassing chamber is connected to the gas outlet end of the oil pool through a pipe, and the first electronic valve is provided on the pipe, the second gas inlet end of the degassing chamber is connected to the gas outlet end of the gas collecting chamber through a pipe, and A second electronic valve is provided on the pipeline; the air outlet end of the air pump is connected to the exhaust pipe through the pipeline, and a second three-way electronic valve is provided on the pipeline, the second three-way electronic valve is also connected to the air inlet end of the oil pool through the pipeline, and a first three-way electronic valve is also provided on the pipeline; the first three-way electronic valve is also connected to the air inlet end of the air collecting chamber through the pipeline; the central control unit controls the switches of the first electronic valve, the second electronic valve, the first three-way electronic valve and the second three-way electronic valve respectively, so as to form a degassing circuit and a measuring circuit between the oil pool, the degassing chamber, the air collecting chamber and the air pump.

[0012] As a further improvement of the above technical solution:

[0013] It also includes an air intake pipe for connecting to an external air source. A fourth three-way electronic valve is also provided on the pipe connecting the first three-way electronic valve and the air intake end of the oil pool. The fourth three-way electronic valve is also connected to the air intake pipe through the pipe to form a first cleaning circuit between the oil pool, the degassing chamber and the air pump under the control of the central control unit and to perform air path purging operations by introducing external gas.

[0014] A third three-way electronic valve is also provided on the pipeline connecting the first three-way electronic valve and the air inlet end of the gas collecting chamber. The third three-way electronic valve is also connected to the air inlet pipe through the pipeline, so as to form a second cleaning circuit between the gas collecting chamber, the degassing chamber and the air pump under the control of the central control unit and to perform gas path purging operation by introducing external gas.

[0015] An oil mist filter is also provided on the pipeline connecting the third three-way electronic valve and the air inlet end of the air collecting chamber.

[0016] The air inlet pipe is provided with a replaceable desiccant device for drying the external high-pressure gas introduced.

[0017] The desiccant device comprises a drying box which is limitedly slidably arranged in the air inlet pipe, the drying box is provided with a plurality of ventilation holes, and silica gel drying material is installed in the drying box for drying the introduced high-pressure gas.

[0018] The drying box comprises a bottom box part and a box cover part which are detachably connected by threads, a cavity is formed between the bottom box part and the box cover part for placing silica gel dried objects, and a plurality of ventilation holes are arranged on the bottom box part and the box cover part.

[0019] The air inlet pipe is provided with a plurality of protruding limiting parts for limiting the placed drying box in the air inlet pipe, and the outer ends of the bottom box part and the box cover part are both provided with protruding lifting rods for pulling the drying box out of the air inlet pipe when replacing.

[0020] Observation windows are provided on the cavity walls of the degassing chamber and the gas collecting chamber. The observation windows are made of transparent PC material and are used for real-time observation of the working conditions in the chambers.

[0021] A transparent observation window is also provided on the pipeline connecting the degassing chamber and the oil pool end, so as to observe the reflux oil in the pipeline in real time.

[0022] Compared with the prior art, the advantages of the utility model are:

[0023] First, the utility model is a transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing, which is provided with a special central control unit, a degassing chamber, a gas collecting chamber, an air pump, a first electronic valve, a second electronic valve, a first three-way electronic valve, a second three-way electronic valve, an exhaust pipe and a plurality of connecting pipes; and these components are connected in a special matching way to form a degassing circuit and a measuring circuit between the oil pool, the degassing chamber, the gas collecting chamber and the air pump. This makes the utility model device suitable for the online monitoring system of gas in transformer oil, which can continuously bubble, has high degassing efficiency and greatly shortens the degassing time; and is conducive to the real-time online analysis of dissolved gas in transformer oil.

[0024] Second, the utility model is a transformer oil spectral analysis degassing measurement device based on double gas chamber headspace degassing. The special structural design allows continuous bubbling to allow the gas to be enriched in the degassing chamber, and then the gas in the degassing chamber is transferred to the gas collecting chamber for measurement. This can prevent oil mist from entering the gas collecting chamber, thereby reducing contamination of high-precision sensors, avoiding affecting measurement results, and improving measurement accuracy.

[0025] Third, the utility model of the transformer oil spectrum analysis degassing measuring device based on double air chamber headspace degassing forms a first cleaning circuit and a second cleaning circuit between the oil pool, the degassing chamber, the gas collecting chamber and the air pump by setting a special third three-way electronic valve and a fourth three-way electronic valve, and these components are connected in a special matching manner. The utility model device uses gas to automatically clean the gas path, discharge the residual gas and oil mist in the device, and greatly improve the accuracy of the next measurement. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the utility model.

[0027] Figure 2 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 1 .

[0028] Figure 3 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 2 .

[0029] Figure 4 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 3 .

[0030] Figure 5 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 4 .

[0031] Figure 6 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 5 .

[0032] Figure 7 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 6 .

[0033] Figure 8 The working state of the utility model in a specific application embodiment is shown in FIG. Figure 7 .

[0034] The symbols in the figure represent:

[0035] 1. Oil pool; 2. Degassing chamber; 3. Gas collecting chamber; 4. Air pump; 51. First electronic valve; 52. Second electronic valve; 61. First three-way electronic valve; 62. Second three-way electronic valve; 63. Third three-way electronic valve; 64. Fourth three-way electronic valve; 71. Exhaust pipe; 72. Inlet pipe; 73. Desiccant device; 8. Oil mist filter. DETAILED DESCRIPTION

[0036] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] In the description of the present application, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "assemble", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] like Figures 1 to 8As shown, the transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing of this embodiment is used in connection with an oil pool 1, and includes a central control unit (not shown in the figure), a degassing chamber 2, a gas collecting chamber 3, an air pump 4, a first electronic valve 51, a second electronic valve 52, a first three-way electronic valve 61, a second three-way electronic valve 62, an exhaust pipe 71 and a plurality of connecting pipes; the outlet end of the degassing chamber 2 is connected to the air extraction end of the air pump 4 through a pipe, the first air inlet end of the degassing chamber 2 is connected to the outlet end of the oil pool 1 through a pipe, and the first electronic valve 51 is provided on the pipe, and the second air inlet end of the degassing chamber 2 is connected to the outlet end of the gas collecting chamber 3 through a pipe. The first and second three-way electronic valves 51, 52 and 61 are connected to each other through a pipeline, and a second electronic valve 52 is provided on the pipeline; the outlet end of the air pump 4 is connected to the exhaust pipe 71 through a pipeline, and a second three-way electronic valve 62 is provided on the pipeline, and the second three-way electronic valve 62 is also connected to the air inlet end of the oil pool 1 through a pipeline, and a first three-way electronic valve 61 is also provided on the pipeline; the first three-way electronic valve 61 is also connected to the air inlet end of the gas collecting chamber 3 through a pipeline; the central control unit controls the switching of the first electronic valve 51, the second electronic valve 52, the first three-way electronic valve 61 and the second three-way electronic valve 62 respectively, so as to form a degassing circuit and a measuring circuit between the oil pool 1, the degassing chamber 2, the gas collecting chamber 3 and the air pump 4.

[0041] In this embodiment, the central control unit is respectively connected to the air pump 4, the first electronic valve 51, the second electronic valve 52, the first three-way electronic valve 61, the second three-way electronic valve 62 (also including the third three-way electronic valve 63 and the fourth three-way electronic valve 64 in the preferred embodiment below), and can control each electronic valve to switch separately or simultaneously. At the same time, for ease of understanding, each three-way electronic valve in the figure is provided with three port parts A, B, and C, and the description of A, B, and C will also be introduced in the specific description below to realize the connection of different ports of the three-way electronic valve.

[0042] The specific implementation principles are as follows:

[0043] 1. Vacuuming operation: Under the control of the central control unit, the second electronic valve 52 and the first electronic valve 51 are opened, and the BC end of the second three-way electronic valve 62 is opened. At this time, the state is as follows: Figure 2 Then start the air pump 4 to evacuate the degassing chamber 2 and the gas collecting chamber 3, and when the vacuum degree of the degassing chamber 2 and the gas collecting chamber 3 meets the conditions, stop the air pump 4 to pump air. The pumping method of the air pump 4 is shown by the arrow in the figure.

[0044] 2. Degassing operation: Under the control of the central control unit, close the second electronic valve 52, open the AC end of the first three-way electronic valve 61, and open the AC end of the second three-way electronic valve 62. At this time, the state is as follows Figure 3 As shown, a degassing circuit is formed.

[0045] Then, transformer oil is injected into the oil pool 1. Due to the low pressure in the degassing chamber 2, the dissolved gas in the transformer oil will be separated to the top of the oil pool 1. The air pump 4 works to send the gas above to the bottom of the degassing chamber 2, driving the dissolved gas in the oil to precipitate and accelerate the separation of the gas in the oil. This process can be carried out continuously, and bubbling is repeated until all the gas in the transformer oil is replaced. After the degassing is completed, let it stand for 10 seconds to allow the oil carried into the degassing chamber 2 to flow back to the oil pool 1.

[0046] 3. Measurement operation: Under the control of the central control unit, after the degassing process is completed, the first electronic valve 51 is closed, the second electronic valve 52 is opened, the BC end of the first three-way electronic valve 61 is connected, the AC end of the second three-way electronic valve 62 is connected, and the BC end of the third three-way electronic valve 63 is connected. At this time, the state is as follows Figure 4 Then the gas pump 4 is started, and the gas in the degassing chamber 2 passes through the second three-way electronic valve 62 and the first three-way electronic valve 61 and enters the concentrated gas chamber 3 for enrichment. The gas collecting chamber 3 is provided with a high-precision sensor assembly for measurement.

[0047] Through the above special scientific design, it has the following technical advantages:

[0048] First, the utility model is a transformer oil spectrum analysis degassing measuring device based on double gas chamber headspace degassing, which is provided with a special central control unit, a degassing chamber 2, a gas collecting chamber 3, an air pump 4, a first electronic valve 51, a second electronic valve 52, a first three-way electronic valve 61, a second three-way electronic valve 62, an exhaust pipe 71 and a plurality of connecting pipes; and these components are connected in a special matching manner to form a degassing circuit and a measuring circuit between the oil pool 1, the degassing chamber 2, the gas collecting chamber 3 and the air pump 4. The utility model device is suitable for the online monitoring system of gas in transformer oil, can be continuously bubbled, has high degassing efficiency, and greatly shortens the degassing time; and is conducive to the real-time online analysis of dissolved gas in transformer oil.

[0049] Second, the utility model is a transformer oil spectral analysis degassing measuring device based on double gas chamber headspace degassing. The special structural design allows continuous bubbling to allow the gas to be enriched in the degassing chamber 2, and then the gas in the degassing chamber 2 is transferred to the gas collecting chamber 3 for measurement. This can prevent oil mist from entering the gas collecting chamber 3, thereby reducing the contamination of high-precision sensors, avoiding affecting the measurement results, and improving the measurement accuracy.

[0050] In this embodiment, an air inlet pipe 72 for communicating with an external air source is also included. A fourth three-way electronic valve 64 is also provided on the pipeline connecting the first three-way electronic valve 61 and the air inlet end of the oil pool 1. The fourth three-way electronic valve 64 is also connected to the air inlet pipe 72 through a pipeline, so as to form a first cleaning circuit between the oil pool 1, the degassing chamber 2 and the air pump 4 under the control of the central control unit and to perform air path purging operations by introducing external gas. In this embodiment, a third three-way electronic valve 63 is also provided on the pipeline connecting the first three-way electronic valve 61 and the air inlet end of the gas collecting chamber 3. The third three-way electronic valve 63 is also connected to the air inlet pipe 72 through a pipeline, so as to form a second cleaning circuit between the gas collecting chamber 3, the degassing chamber 2 and the air pump 4 under the control of the central control unit and to perform air path purging operations by introducing external gas. That is, before the vacuuming operation, the device can also form different cleaning circuits to clean each related pipeline.

[0051] The specific implementation principles are as follows:

[0052] 1. To prevent the last gas from interfering with this test, all valves are disconnected, and the oil outlet of the oil pool 1 is opened to drain the oil. After the oil is drained, under the control of the central control unit, the degassing chamber 2 is evacuated, the AC of the first three-way electronic valve 61 is opened, the BC of the second three-way electronic valve 62 is opened, the BC of the fourth three-way electronic valve 64 is opened, the first electronic valve 51 is opened, and the air pump 4 is started. The main purpose is to allow the residual gas in the section of the pipeline between the second three-way electronic valve 62, the first three-way electronic valve 61, and the fourth three-way electronic valve 64 to enter the degassing chamber 2. At this time, the state is as follows: Figure 5 As shown, a first cleaning loop is formed.

[0053] 2. Under the control of the central control unit, the BC of the second three-way electronic valve 62 is opened, the AC of the fourth three-way electronic valve 64 is opened, and N2 is blown into the intake pipe 72 to purge the first cleaning circuit. After the purge, the gas is discharged from the exhaust pipe 71. At this time, the state is as follows: Figure 6 shown.

[0054] 3. Under the control of the central control unit, BC of the third three-way electronic valve 63 is opened, AC of the second three-way electronic valve 62 is opened, BC of the first three-way electronic valve 61 is opened, the second electronic valve 52 is opened, and the first electronic valve 51 is closed, and the gas collecting chamber 3 is evacuated, mainly to allow the residual gas in the pipeline between the first three-way electronic valve 61 and the third three-way electronic valve 63 to enter the gas collecting chamber 3. At this time, the state is as follows: Figure 7 shown.

[0055] 4. Under the control of the central control unit, the AC of the third three-way electronic valve 63 is opened, the BC of the second three-way electronic valve 62 is opened, and N2 is blown into the air intake pipe 72 to purge the circuit. After the purge, the gas is discharged from the exhaust pipe 71. At this time, the state is as follows: Figure 8 shown.

[0056] Through the above special scientific design, it has the following technical advantages:

[0057] The utility model transformer oil spectrum analysis degassing measuring device based on double air chamber headspace degassing, by setting a special third three-way electronic valve 63 and a fourth three-way electronic valve 64, and these components are connected in a special matching manner, to form a first cleaning circuit and a second cleaning circuit between the oil pool 1, the degassing chamber 2, the gas collecting chamber 3 and the air pump 4. The utility model device uses gas to automatically clean the gas path, discharge the residual gas and oil mist in the device, and greatly improve the accuracy of the next measurement.

[0058] In this embodiment, an oil mist filter 8 is also provided on the pipeline connecting the third three-way electronic valve 63 and the air inlet end of the air collecting chamber 3 .

[0059] In this embodiment, a replaceable desiccant device 73 is provided on the air inlet pipe 72 for drying the external high-pressure gas introduced therein.

[0060] In this embodiment, the desiccant device 73 includes a drying box (not shown) limitedly slidably disposed in the air inlet pipe 72. The drying box is provided with a plurality of ventilation holes. The drying box is equipped with silica gel desiccant for drying the introduced high-pressure gas.

[0061] In this embodiment, the drying box includes a bottom box part and a cover part which are detachably connected by threads, a cavity is formed between the bottom box part and the cover part for placing silica gel drying objects, and a plurality of ventilation holes are provided on the bottom box part and the cover part.

[0062] In this embodiment, a plurality of protruding limiting portions are provided in the air inlet pipe 72 for limiting the placed drying box in the air inlet pipe 72, and protruding lifting rods are provided on the outer ends of the bottom box portion and the box cover portion for pulling the drying box out of the air inlet pipe 72 when replacing it.

[0063] In this embodiment, observation windows are provided on the cavity walls of the degassing chamber 2 and the gas collecting chamber 3. The observation windows are made of transparent PC material and are used to observe the indoor operation conditions of the degassing chamber 2 and the gas collecting chamber 3 in real time.

[0064] In this embodiment, a transparent observation window is also provided on the pipeline connecting the degassing chamber 2 and the oil pool 1, so as to observe the reflux oil in the pipeline in real time.

[0065] Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the art can use the above disclosed technical content to make many possible changes and modifications to the technical solution of the present invention without departing from the scope of the technical solution of the present invention, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention should fall within the scope of protection of the technical solution of the present invention.

Claims

1. A transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing, used in connection with an oil pool (1), characterized in that: The invention comprises a central control unit, a degassing chamber (2), a gas collecting chamber (3), an air pump (4), a first electronic valve (51), a second electronic valve (52), a first three-way electronic valve (61), a second three-way electronic valve (62), an exhaust pipe (71) and a plurality of connecting pipes; the outlet end of the degassing chamber (2) is connected to the exhaust end of the air pump (4) through a pipe, the first inlet end of the degassing chamber (2) is connected to the outlet end of the oil pool (1) through a pipe, and the first electronic valve (51) is provided on the pipe, the second inlet end of the degassing chamber (2) is connected to the outlet end of the gas collecting chamber (3) through a pipe, and the second electronic valve (52) is provided on the pipe; the air pump (4) The outlet end of the oil pool (1) is connected to an exhaust pipe (71) through a pipeline, and a second three-way electronic valve (62) is provided on the pipeline; the second three-way electronic valve (62) is also connected to an inlet end of the oil pool (1) through a pipeline, and a first three-way electronic valve (61) is also provided on the pipeline; the first three-way electronic valve (61) is also connected to an inlet end of the gas collection chamber (3) through a pipeline; the central control unit controls the switching of the first electronic valve (51), the second electronic valve (52), the first three-way electronic valve (61) and the second three-way electronic valve (62) respectively, so as to form a degassing circuit and a measuring circuit between the oil pool (1), the degassing chamber (2), the gas collection chamber (3) and the air pump (4).

2. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 1 is characterized in that: It also includes an air intake pipe (72) for communicating with an external air source, and a fourth three-way electronic valve (64) is provided on the pipe connecting the first three-way electronic valve (61) and the air intake end of the oil pool (1). The fourth three-way electronic valve (64) is also connected to the air intake pipe (72) through the pipe, so as to form a first cleaning circuit between the oil pool (1), the degassing chamber (2) and the air pump (4) under the control of the central control unit and to perform an air path purging operation by introducing external air.

3. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 2 is characterized in that: A third three-way electronic valve (63) is also provided on the pipeline connecting the first three-way electronic valve (61) and the air inlet end of the gas collecting chamber (3). The third three-way electronic valve (63) is also connected to the air inlet pipe (72) through the pipeline, so as to form a second cleaning circuit between the gas collecting chamber (3), the degassing chamber (2) and the air pump (4) under the control of the central control unit and to perform a gas path purging operation by introducing external gas.

4. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 3 is characterized in that: An oil mist filter (8) is also provided on the pipeline connecting the third three-way electronic valve (63) and the air inlet end of the air collecting chamber (3).

5. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 2 is characterized in that: The air inlet pipe (72) is provided with a replaceable desiccant device (73) for drying the external high-pressure gas introduced therein.

6. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 5 is characterized in that: The desiccant device (73) comprises a drying box which is limitedly slidably arranged in the air inlet pipe (72), the drying box being provided with a plurality of ventilation holes, and the drying box being provided with a silica gel drying material for drying the introduced high-pressure gas.

7. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 6 is characterized in that: The drying box comprises a bottom box part and a box cover part which are detachably connected by threads, a cavity is formed between the bottom box part and the box cover part for placing silica gel dried objects, and a plurality of ventilation holes are arranged on the bottom box part and the box cover part.

8. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 7 is characterized in that: The air inlet pipe (72) is provided with a plurality of protruding limiting portions for limiting the placement of the drying box in the air inlet pipe (72), and the outer ends of the bottom box portion and the box cover portion are both provided with protruding lifting rods for pulling the drying box out of the air inlet pipe (72) when replacing it.

9. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 1, characterized in that: Observation windows are provided on the cavity walls of the degassing chamber (2) and the gas collecting chamber (3), and the observation windows are made of transparent PC material and are used for real-time observation of the working conditions in the chambers.

10. The transformer oil spectral analysis degassing measuring device based on double-chamber headspace degassing according to claim 9, characterized in that: A transparent observation window is also provided on the pipeline connecting the degassing chamber (2) and the oil pool (1) to enable real-time observation of the reflux oil in the pipeline.

Images