Spectral analysis degassing measuring device for transformer oil

Abstract

The utility model discloses a transformer oil spectrum analysis degassing measuring device which comprises an oil pool, a gas chamber, a gas pump and a second three-way switching valve which are communicated through a pipeline and used for forming a degassing circulation loop, and a redundant oil mist filtering assembly is arranged on the pipeline between the oil pool and the gas chamber. The redundant oil mist filtering assembly comprises more than two oil mist filters, so that the oil pool is connected with the more than two oil mist filters in a switching manner, and a gas dredging and uniformizing assembly is arranged at a gas inlet of the oil pool and is used for dredging gas pumped by the gas pump and then uniformizing the gas into the oil pool. The transformer oil spectrum analysis degassing measurement device has the advantages of simple structure, high reliability, uniform gas diffusion and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of transformer oil spectrum analysis devices, in particular to a transformer oil spectrum analysis degassing measurement device. Background Art

[0002] Currently, most large transformers in power systems are oil-immersed. During operation, overheating, discharge, oxidation, and other conditions can generate fault-signaling gases in the transformer oil. Analyzing dissolved gases in transformer oil has become a key method for transformer fault diagnosis.

[0003] The oil spectrum analyzers currently used mainly use the negative pressure constant temperature dynamic headspace degassing method to displace the gas in the oil. The air pump creates a negative pressure above the oil pool, and at the same time, the air in the small air chamber is pumped into the oil pool through the oil pool air inlet. The gas in the transformer oil in the oil pool is displaced and then passes through the oil mist filter device for subsequent monitoring.

[0004] The existing technical solutions have the following deficiencies:

[0005] 1. The existing oil spectrum analyzer pumps air into the oil pool through a straight tube air inlet. The gas diffuses unevenly in the oil pool and cannot fully replace the gas in the oil pool.

[0006] 2. The existing oil spectrum analyzer pumps air into the oil pool through a straight tube air inlet, which may cause direct convection with the air above the oil pool, carrying oil mist into the oil mist filter device and contaminating the oil mist filter device.

[0007] 3. The existing oil spectrum analyzer only has one oil mist filter. When the oil mist filter fails, is blocked, or expires, if it is not replaced in time, it will affect the normal use of the oil spectrum gas analysis detection device and even cause oil mist to enter the measuring device and damage the measuring device. Utility Model Content

[0008] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a transformer oil spectrum analysis degassing measuring device which has a simple structure, high reliability and uniform air intake.

[0009] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0010] A transformer oil spectral analysis and degassing measurement device includes an oil pool, an air chamber, an air pump, and a second three-way switching valve connected by a pipeline to form a degassing circulation loop. A redundant oil mist filter assembly is provided on the pipeline between the oil pool and the air chamber. The redundant oil mist filter assembly includes two or more oil mist filters for switching the oil pool with the two or more oil mist filters. A gas diversion and uniformization assembly is provided at the air inlet of the oil pool to divert the gas pumped in by the air pump and evenly diffuse it into the oil pool.

[0011] As a further improvement of the above technical solution:

[0012] The redundant oil mist filter assembly includes a first oil mist filter, a second oil mist filter and a first three-way switching valve. The air outlet ends of the first oil mist filter and the second oil mist filter are connected to the air inlet end of the air chamber through pipelines, and the air outlet end of the oil pool is switched and connected to the first oil mist filter and the second oil mist filter through the first three-way switching valve.

[0013] The gas diversion and uniforming component includes an umbrella-shaped gas guide cover, which is provided with a plurality of downwardly extending mounting feet for mounting the gas guide cover above the air inlet and forming a distance between the gas guide cover and the bottom plate of the oil pool to divert the pumped gas.

[0014] The air guide cover is provided with a plurality of air-distributing holes for evenly dispersing the pumped gas.

[0015] The bottom plate is provided with a plurality of limiting seats matched with the mounting feet around the air inlet, so as to be used for detachably mounting the air guide cover above the air inlet.

[0016] A limiting hole is provided above the limiting seat for inserting the mounting foot from top to bottom and clamping the foot to form a limiting installation.

[0017] A protruding elastic piece is provided in the limiting hole for tightly pressing against the inserted mounting foot.

[0018] A limiting groove is transversely provided on the inner wall surface of the limiting seat, and a limiting rib is transversely provided on the outer wall surface of the mounting foot to match the limiting groove, so that the mounting foot can be rotated during installation to screw the limiting rib into the limiting groove to form a limiting connection.

[0019] The oil pool is also provided with an oil inlet, which is connected to an oil pump for pumping transformer oil into the oil pool.

[0020] The first three-way switching valve and the second three-way switching valve are both solenoid valves.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1. The transformer oil spectral analysis and degassing measuring device disclosed in the present invention is configured to form a degassing circulation loop by providing an oil pool, an air chamber, an air pump, and a second three-way switching valve connected by pipelines, and a redundant oil mist filter assembly is provided on the pipeline between the oil pool and the air chamber. The replacement rate of gas in transformer oil is greater than the dissolution rate. By repeatedly bubbling the gas in the degassing circulation loop, the dissolved gas in the transformer oil can be completely replaced, and all the gas in the transformer oil can be replaced into the air chamber for detection. By providing a redundant oil mist filter assembly to filter the oil mist separated from the oil pool, the service life of the oil mist filter can be extended through intermittent operation; when one of the oil mist filters is clogged or fails, the pipeline can be switched to another normally usable oil mist filter to continue operation, thereby avoiding affecting the normal use of the oil spectral gas analysis detection device.

[0023] Second, the transformer oil spectral analysis and degassing measurement device disclosed in this utility model utilizes a gas distribution assembly installed at the oil sump's air inlet. Upon contact with the gas distribution assembly, the gas entering the inlet diffuses evenly around the assembly before entering the oil sump. First, this prevents uneven gas diffusion within the transformer oil, which could result in inadequate gas replacement. Second, it prevents direct convection between the gas and the air above the oil sump, which could carry oil mist into the redundant oil mist filter assembly. This effectively extends the service life of the oil mist filter.

[0024] Third, the transformer oil spectral analysis and degassing measurement device disclosed in the present invention utilizes a first three-way switching valve to connect the first oil mist filter, the second oil mist filter, and the oil sump. This allows gas in the oil sump to enter the gas chamber through either the first or second oil mist filter, reducing the frequency of use of a single oil mist filter and extending the replacement cycle. If either the first or second oil mist filter fails, the first three-way switching valve automatically switches to connect the other oil mist filter, preventing disruption to the normal operation of the oil spectral gas analysis and detection device and preventing oil mist from entering and damaging the measurement device.

[0025] 4. The transformer oil spectral analysis and degassing measuring device disclosed in the utility model is equipped with a mounting foot to install the air guide cover above the air inlet. The gas entering from the air inlet first contacts the umbrella-shaped air guide cover and disperses to the surrounding areas. Then, it is guided by the air guide cover and enters the oil pool through the gap between the air cover and the bottom plate. This prevents the gas from directly contacting the air above the oil pool, thereby preventing the gas from carrying oil mist into the oil mist filter and reducing the service life of the oil mist filter.

[0026] 5. The transformer oil spectral analysis degassing measuring device disclosed in the present invention has a plurality of uniform air holes on the air guide cover, thereby reducing the impact force of the gas on the air guide cover and improving the gas dispersion efficiency.

[0027] 6. The transformer oil spectrum analysis and degassing measuring device disclosed in the present invention enables the gas distribution component and the bottom plate to be quickly disassembled and repaired by providing a limit seat, thereby improving work efficiency.

[0028] 7. The transformer oil spectrum analysis and degassing measuring device disclosed in the present invention realizes a quick detachable connection by inserting the mounting foot into the limiting hole above the limiting seat.

[0029] 8. The transformer oil spectrum analysis and degassing measuring device disclosed in the present invention is provided with an elastic sheet to press against the mounting foot, thereby preventing gas impact from damaging the connection between the gas uniformization component and the base plate.

[0030] 9. The transformer oil spectral analysis degassing measurement device disclosed in the utility model realizes oil intake from the bottom of the oil pool by setting an oil inlet at the bottom of the oil pool, thereby improving oil intake efficiency and avoiding contact between transformer oil and air to cause measurement data errors.

[0031] 10. The transformer oil spectral analysis and degassing measuring device disclosed in the present utility model has a limiting effect on the detachable connection between the limit seat and the mounting foot by providing a transverse limiting groove and a transverse limiting rib, thereby effectively preventing upward gas impact from damaging the connection between the limit seat and the mounting foot, thereby improving the reliability of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 The utility model is a schematic diagram of the principle of a transformer oil spectrum analysis degassing measurement device.

[0033] Figure 2 This is a schematic diagram of the structural principle of the air guiding and uniforming component in Example 1 of the present utility model.

[0034] Figure 3 This is a schematic diagram of the bottom plate structure principle in Example 1 of the present utility model.

[0035] Figure 4 for Figure 3 Schematic diagram of the enlarged structural principle at point A.

[0036] Figure 5 This is a schematic diagram of the structural principle of the air diversion and uniform air component after installation in Example 1 of the present utility model.

[0037] Figure 6 This is a schematic diagram of the structural principle of the air guiding and uniforming component in Example 2 of the present utility model.

[0038] Figure 7 This is a schematic diagram of the bottom plate structure principle in Example 2 of the present utility model.

[0039] Figure 8 for Figure 7 Schematic diagram of the enlarged structural principle at point B.

[0040] Figure 9 This is a schematic diagram of the structural principle of the air diversion and uniform air component after installation in Example 2 of the present utility model.

[0041] The numbers in the figure represent: 1. Oil pool; 11. Base plate; 12. Oil inlet; 13. Air inlet; 2. Redundant oil mist filter assembly; 21. First oil mist filter; 22. Second oil mist filter; 23. First three-way switching valve; 3. Air chamber; 4. Air pump; 6. Second three-way switching valve; 7. Oil pump; 8. Air diversion and uniform air assembly; 81. Air guide cover; 811. Air uniform air hole; 82. Mounting foot; 821. Limiting rib; 9. Limiting seat; 91. Limiting hole; 92. Limiting groove. DETAILED DESCRIPTION

[0042] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0043] In the description of the present invention, 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 accompanying 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 cannot be understood as a limitation on the present application.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0045] In this utility model, unless otherwise specified or limited, the terms "assemble," "connect," "connect," "fix," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, indirect connection through an intermediate medium, internal communication between two components, or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0046] Example 1

[0047] like Figures 1 to 5As shown, the transformer oil spectral analysis degassing measurement device of this embodiment includes an oil pool 1, an air chamber 3, an air pump 4 and a second three-way switching valve 6 connected by a pipeline to form a degassing circulation loop. A redundant oil mist filter assembly 2 is provided on the pipeline between the oil pool 1 and the air chamber 3. The redundant oil mist filter assembly 2 includes more than two oil mist filters for switching the oil pool 1 with the more than two oil mist filters. A gas diversion and uniformization assembly 8 is provided at the air inlet 13 of the oil pool 1 to divert the gas pumped in by the air pump 4 and evenly diffuse it into the oil pool 1.

[0048] The specific implementation principles are as follows:

[0049] When using the transformer oil spectral analysis and degassing measurement device, first, the second three-way switching valve 6 is connected to the air outlet, and the air pump 4 is turned on for vacuuming. Then, the second three-way switching valve 6 is switched to connect the air pump 4 to the oil pool 1. The vacuuming process reduces the pressure above the oil pool 1, and the dissolved gas in the transformer oil in the oil pool 1 is separated to the upper part of the oil pool 1. At this time, since the air pump 4 is turned on, the dissolved gas is sucked into the air chamber 3 after passing through the redundant oil mist filter assembly 2, thereby degassing the transformer oil. Finally, the separated gas is circulated in the degassing loop by the air pump 4, repeatedly bubbling the transformer oil. Because the gas replacement rate is greater than the dissolution rate, with repeated bubbling, all the gas in the transformer oil is precipitated, causing the air pressure in the air chamber 3 to reach the set value, so that the gas in the air chamber 3 can be detected.

[0050] It should be emphasized that the present invention is provided with a redundant oil mist filter assembly 2 on the pipeline between the oil pool 1 and the air chamber 3, and the redundant oil mist filter assembly 2 includes more than two oil mist filters. Figure 1 For example, this embodiment is provided with two oil mist filters. During operation, the oil pool 1 can be switched and connected with the two oil mist filters. For example, it can be set to switch back and forth between the two oil mist filters every 30 minutes of operation to reduce the frequency of use of a single oil mist filter through intermittent operation and extend the service life of the oil mist filter; or when it is detected that one of the oil mist filters is clogged or malfunctions, the pipeline can be switched to another oil mist filter that can be used normally to continue operation. At the same time, the utility model is further provided with a gas diversion and uniformization component 8 at the air inlet 13 of the oil pool 1. On the one hand, the gas diversion and uniformization component 8 can divert the gas pumped in by the air pump 4 and evenly diffuse it into the oil pool 1, which effectively avoids the uneven diffusion of the pumped gas in the transformer oil and the inability to fully replace the gas. On the other hand, the gas diversion and uniformization component 8 also prevents the pumped gas from directly convecting with the air above the oil pool 1 and carrying oil mist into the redundant oil mist filter component 2, which effectively extends the service life of the oil mist filter. Through the above scientific design, the utility model has the following advantages:

[0051] First, a degassing loop is formed by connecting an oil pool 1, an air chamber 3, an air pump 4, and a second three-way switching valve 6 via a pipeline. A redundant oil mist filter assembly 2 is installed in the pipeline between the oil pool 1 and the air chamber 3. Repeated bubbling of gas in the degassing loop completely displaces dissolved gases from the transformer oil, transferring all of the gas to the air chamber 3 for detection. By providing a redundant oil mist filter assembly 2 to filter the oil mist separated from the oil pool 1, the service life of the oil mist filter can be extended through intermittent operation. If one oil mist filter becomes clogged or malfunctions, the pipeline can be switched to another functioning oil mist filter to continue operation, thus preventing any disruption to the oil spectral gas analysis and detection device.

[0052] Second, by installing a gas distribution assembly 8 at the air inlet 13 of the oil sump 1, the gas entering through the air inlet 13, upon contact with the gas distribution assembly 8, diffuses evenly around the assembly before evenly entering the oil sump 1. This prevents uneven gas diffusion in the transformer oil, which could result in inadequate gas replacement. Furthermore, it prevents direct convection between the gas and the air above the oil sump 1, which could carry oil mist into the redundant oil mist filter assembly 2. This effectively extends the service life of the oil mist filter.

[0053] like Figure 1 As shown, in this embodiment, the redundant oil mist filter assembly 2 includes a first oil mist filter 21, a second oil mist filter 22, and a first three-way switching valve 23. The outlets of the first and second oil mist filters 21, 22 are connected to the inlet of the air chamber 3 via pipelines. The outlet of the oil pool 1 is switched between the first and second oil mist filters 21, 22 via the first three-way switching valve 23. By providing the first three-way switching valve 23 to connect the first and second oil mist filters 21, 22, and the oil pool 1, gas in the oil pool 1 can enter the air chamber 3 through either the first or second oil mist filter 21, 22. This reduces the frequency of use of a single oil mist filter and extends its service life. If either the first or second oil mist filter 21, 22 fails, the first three-way switching valve 23 automatically switches to the other oil mist filter, preventing disruption to the normal operation of the oil spectroscopy gas analysis and detection device and preventing oil mist from entering and damaging the measuring device.

[0054] Preferably, every 30 minutes when a single oil mist filter works, the first three-way switching valve 23 automatically switches to connect to another oil mist filter.

[0055] like Figures 2 to 4As shown, in this embodiment, the gas diversion and uniformization component 8 includes an umbrella-shaped air guide cover 81, which is provided with a plurality of downwardly extending mounting feet 82, which are used to install the air guide cover 81 above the air inlet 13 and to form a gap between the air guide cover 81 and the bottom plate 11 of the oil pool 1 to divert the pumped gas. The gas entering from the air inlet 13 first contacts the umbrella-shaped air guide cover 81 and disperses to the surroundings. It is then diverted downward by the umbrella-shaped air guide cover 81 and flows into the oil pool 1 through the gap between the air guide cover 81 and the bottom plate 11, so that the gas does not directly convect, effectively avoiding the entry of oil mist into the oil mist filter, and effectively extending the service life of the oil mist filter. At the same time, the structural form of the umbrella-shaped air guide cover 81 can also evenly diffuse the gas pumped in by the air pump 4 into the oil pool 1, so that the gas is fully replaced.

[0056] like Figure 2 As shown, in this embodiment, the air guide cover 81 is provided with a plurality of uniform air holes 811 for evenly dispersing the pumped gas. The provision of the plurality of uniform air holes 811 on the air guide cover 81 reduces the impact force of the gas on the air guide cover 81 and improves the gas dispersion efficiency, further enabling full gas replacement.

[0057] like Figures 3 and 4 As shown, in this embodiment, a plurality of stoppers 9 are provided on the bottom plate 11 around the air inlet 13, which cooperate with the mounting feet 82 and are used to detachably mount the air guide cover 81 above the air inlet 13. The provision of the stoppers 9 allows for quick disassembly and maintenance of the air distribution assembly 8 and the bottom plate 11, thereby improving work efficiency.

[0058] like Figures 3 to 5 As shown, in this embodiment, a limiting hole 91 is defined above the limiting seat 9, allowing the mounting foot 82 to be inserted from top to bottom and then locked to form a limited installation. The limiting hole 91 and the mounting foot 8 have an interference fit, and by inserting the mounting foot 82 into the limiting hole 91 above the limiting seat 9, the air distribution assembly 8 and the oil pool 1 are quickly and removably connected.

[0059] In this embodiment, a protruding elastic sheet is provided in the limiting hole 91 to press against the inserted mounting foot 82. By setting the elastic sheet to press against the mounting foot 82, the gas guide and uniform gas assembly 8 is more firmly installed to prevent the gas impact from causing the gas guide and uniform gas assembly 8 to be detached.

[0060] like Figure 1 As shown, in this embodiment, the oil pool 1 is further provided with an oil inlet 12, which is connected to the oil pump 7 for pumping transformer oil into the oil pool 1. Providing the oil inlet 12 at the bottom of the oil pool 1 allows oil to be introduced from the bottom of the oil pool 1, improving oil supply efficiency and preventing transformer oil from coming into contact with air, which could lead to errors in measurement data.

[0061] like Figure 1As shown, in this embodiment, the first three-way switching valve 23 and the second three-way switching valve 6 are both solenoid valves. The solenoid valve has a simple structure and fast response.

[0062] Example 2

[0063] like Figures 6 to 9 As shown, other components are the same as those in Example 1, with only the structural form and installation matching relationship of the gas diversion and uniform distribution component 8 and the limiting seat 9 being different. In this embodiment, a limiting groove 92 is horizontally provided on the inner wall surface of the limiting seat 9, and a limiting rib 821 is horizontally provided on the outer wall surface of the mounting foot 82 to match the limiting groove 92, so that the mounting foot 82 can be rotated during installation to screw the limiting rib 821 into the limiting groove 92 to form a limiting connection. By providing the horizontal limiting groove 92 and the horizontal limiting rib 821, the detachable connection between the limiting seat 9 and the mounting foot 82 is limited, which not only makes installation and disassembly convenient and quick, but also makes the installation of the gas diversion and uniform distribution component 8 more stable, effectively preventing the gas impact from causing the gas diversion and uniform distribution component 8 to detach, and improving the reliability of the device.

[0064] Although the present invention has been disclosed above with reference to preferred embodiments, this is not intended to limit the present invention. Any person skilled in the art can, without departing from the scope of the present invention, utilize the technical content disclosed above to make many possible changes and modifications to the present invention, or modify it into equivalent embodiments with equivalent variations. Therefore, any simple modifications, equivalent variations, and modifications made to the above embodiments based on the technical essence of the present invention, without departing from the content of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A transformer oil spectral analysis degassing measuring device, comprising an oil pool (1), an air chamber (3), an air pump (4) and a second three-way switching valve (6) connected by pipelines to form a degassing circulation loop, characterized in that: A redundant oil mist filter assembly (2) is provided on the pipeline between the oil pool (1) and the air chamber (3), and the redundant oil mist filter assembly (2) includes two or more oil mist filters for switching the oil pool (1) with the two or more oil mist filters. A gas diversion and uniformization assembly (8) is provided at the air inlet (13) of the oil pool (1) for diverting the gas pumped in by the air pump (4) and uniformly diffusing it into the oil pool (1).

2. The transformer oil spectral analysis degassing measuring device according to claim 1, characterized in that: The redundant oil mist filter assembly (2) comprises a first oil mist filter (21), a second oil mist filter (22) and a first three-way switching valve (23); the air outlet ends of the first oil mist filter (21) and the second oil mist filter (22) are connected to the air inlet end of the air chamber (3) through a pipeline; and the air outlet end of the oil pool (1) is switched and connected to the first oil mist filter (21) and the second oil mist filter (22) through the first three-way switching valve (23).

3. The transformer oil spectral analysis degassing measuring device according to claim 1, characterized in that: The gas guiding and uniforming component (8) comprises an umbrella-shaped gas guiding cover (81), wherein the gas guiding cover (81) is provided with a plurality of downwardly extending mounting feet (82) for mounting the gas guiding cover (81) above the gas inlet (13) and forming a gap between the gas guiding cover (81) and the bottom plate (11) of the oil pool (1) to guide the pumped gas.

4. The transformer oil spectral analysis degassing measuring device according to claim 3, characterized in that: The air guide cover (81) is provided with a plurality of air-distributing holes (811) for evenly dispersing the pumped gas.

5. The transformer oil spectral analysis degassing measuring device according to claim 3, characterized in that: The bottom plate (11) is provided with a plurality of limiting seats (9) matched with the mounting feet (82) around the air inlet (13) for detachably mounting the air guide cover (81) above the air inlet (13).

6. The transformer oil spectral analysis degassing measuring device according to claim 5, characterized in that: A limiting hole (91) is provided above the limiting seat (9) for inserting the mounting foot (82) from top to bottom and clamping the mounting foot to form a limiting installation.

7. The transformer oil spectral analysis degassing measuring device according to claim 6, characterized in that: The limiting hole (91) is provided with a protruding elastic piece and a mounting foot (82) for pressing against the inserted mounting foot.

8. The transformer oil spectral analysis degassing measuring device according to claim 5, characterized in that: A limiting groove (92) is transversely provided on the inner wall surface of the limiting seat (9), and a limiting rib (821) is transversely provided on the outer wall surface of the mounting foot (82) and matches the limiting groove (92), so that the mounting foot (82) can be rotated during installation to screw the limiting rib (821) into the limiting groove (92) to form a limiting connection.

9. The transformer oil spectral analysis degassing measuring device according to claim 1, characterized in that: The oil pool (1) is also provided with an oil inlet (12), and the oil inlet (12) is connected to an oil pump (7) for pumping transformer oil into the oil pool (1).

10. The transformer oil spectral analysis degassing measuring device according to claim 2, characterized in that: The first three-way switching valve (23) and the second three-way switching valve (6) are both solenoid valves.

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