Transformer oil extraction device

Abstract

The utility model relates to the technical field of transformer oil sampling, and discloses a transformer oil extraction device which comprises an extraction assembly, a vacuum air exhaust assembly is arranged at the air exhaust end of the extraction assembly; a liquid inlet assembly is arranged at the top liquid inlet end of the extraction assembly, and one end of the liquid inlet assembly is connected with the extraction end of a transformer oil tank; a liquid extraction assembly is arranged at the liquid outlet end of the extraction assembly and comprises a liquid extraction pump; when the transformer oil is extracted, the transformer oil can be collected and stored through the extraction assembly, after standing for a period of time, impurities in the oil body can be precipitated at the bottom of the box body, then the oil body above the precipitate is pumped into the sampling assembly through the liquid pumping assembly, and after pumping is completed, the oil body can flow back into a transformer oil tank through the liquid pumping assembly; by means of the mode, the transformer oil can be extracted without discharging waste liquid, after sampling is completed, clear oil on the upper portion can flow back into the transformer oil tank, and waste of the transformer oil is effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of transformer oil sampling technology, specifically a transformer oil extraction device. Background Technology

[0002] Oil-immersed transformers are a new type of high-performance transformer with a more rational structure and superior performance. Their three-dimensional wound core, with its three core columns arranged in an equilateral triangle, eliminates air gaps in the magnetic circuit, resulting in tighter winding, uniform and shortest lengths for the three magnetic circuits, and a cross-sectional area closer to a circle. This further improves performance, reduces losses and noise, achieves three-phase balance, and reduces third harmonic components. This product is more suitable for power grid upgrades in urban and rural areas, industrial and mining enterprises, and for use in combined transformers and prefabricated substations. After a period of use, the transformer oil in oil-immersed transformers may age and deteriorate, requiring oil extraction and testing.

[0003] For example, Chinese utility model patent CN219870466U proposes an extraction device for transformer oil testing, including an oil storage tank. The top of the oil storage tank has an oil inlet pipe, and the interior of the tank is equipped with a partition that divides the interior into a waste sample chamber on the left and a sampling chamber on the right. The waste sample chamber and the sampling chamber are respectively connected to the oil inlet pipe. The lower end of the waste sample chamber has a waste outlet, and the lower end of the sampling chamber has a sampling port. A sampling bottle is connected to the sampling port via a sampling hose. The top of the sampling bottle... The sample tube is threaded and has a sealing cap with an extraction tube that communicates with the inside of the sampling bottle. It also includes a fastening device, with both ends of the sampling tube connected to the sampling port and the sealing cap respectively via the fastening device. The fastening device includes a conversion connector with internal threads. Both the sampling port and the sealing cap are threaded to the conversion connector. The outer diameter of the conversion connector gradually decreases from one end to the other, and the smaller outer diameter end has external threads on its outer side. A compression nut is threaded onto these external threads.

[0004] In the existing technology, oil is extracted using an oil storage tank. Before extraction, the waste liquid at the bottom of the transformer oil tank needs to be drained and then collected for sampling. When draining the waste liquid, most of the oil is drained, resulting in a waste of transformer oil during extraction. Utility Model Content

[0005] (a) Technical problems to be solved

[0006] To address the shortcomings of existing technologies, this utility model provides a transformer oil extraction device that can extract transformer oil without discharging waste liquid. After sampling, the clarified oil can be returned to the transformer oil tank, effectively avoiding the waste of transformer oil. This solves the problem that when discharging waste liquid, most of the oil is discharged, leading to waste of transformer oil during extraction.

[0007] (II) Technical Solution

[0008] To achieve the above objectives, this utility model provides the following technical solution: a transformer oil extraction device, comprising an extraction component; a vacuum extraction component is provided at the extraction end of the extraction component; a liquid inlet component is provided at the top liquid inlet end of the extraction component, one end of which is connected to the extraction end of the transformer oil tank; a liquid extraction component is provided at the liquid outlet end of the extraction component, the liquid extraction component comprising a liquid extraction pump disposed at the liquid outlet end of the extraction component; a suction pipe fixedly connected to the liquid extraction end of the liquid extraction pump; a liquid extraction pipe fixedly connected to the liquid outlet end of the liquid extraction pump; a three-way valve fixedly connected to the top end of the liquid extraction pipe; a sampling pipe disposed at one port of the three-way valve; and a return pipe disposed at the other port of the three-way valve, one end of which is connected to the liquid inlet end of the transformer oil tank.

[0009] One end of the sampling tube is connected to a sampling assembly, which includes a sampling bottle; a one-way air extraction valve located at the top port of the sampling bottle; an air extraction cylinder located at the air extraction end of the one-way air extraction valve; and a connecting tube fixedly connected to the liquid inlet end of the one-way air extraction valve.

[0010] Preferably, the extraction assembly includes an extraction box; a drain valve fixedly connected to the bottom drain end of the extraction box; and a drain pipe fixedly connected to the drain end of the drain valve.

[0011] Preferably, the vacuum pumping assembly includes a vacuum pump; a pumping pipe, fixedly connected to the pumping end of the extraction assembly, and the other end connected to the pumping end of the vacuum pump.

[0012] Preferably, the liquid inlet assembly includes a liquid inlet valve; a liquid inlet pipe disposed at the top liquid inlet end of the extraction assembly, one end of which is connected to one port of the liquid inlet valve; and a liquid outlet pipe disposed at the extraction port of the transformer oil tank, one end of which is connected to the other port of the liquid inlet valve.

[0013] Preferably, the outer wall of the sampling bottle is provided with a graduated observation window.

[0014] Preferably, the top of the sampling bottle is detachably connected to the one-way suction valve via a thread.

[0015] (III) Beneficial Effects

[0016] Compared with the prior art, the present invention provides a transformer oil extraction device, which has the following beneficial effects:

[0017] 1. This transformer oil extraction device, by setting up an extraction component, is connected to the extraction port and the inlet port of the transformer oil tank through a liquid inlet component and a liquid extraction component, respectively. The liquid extraction component has two ports, one of which is connected to the sampling component, and the other port is returned to the transformer oil tank through the liquid inlet port. When extracting transformer oil, the extraction component can collect and store the transformer oil. After a period of settling, the impurities in the oil can be settled at the bottom of the tank. Then, the liquid extraction component can be used to pump the oil above the sediment into the sampling component. After extraction, the oil can be returned to the transformer oil tank through the liquid extraction component. This method can extract transformer oil without draining waste liquid, and after sampling, the clarified oil above can be returned to the transformer oil tank, effectively avoiding the waste of transformer oil. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2 This is a cross-sectional view of the present invention;

[0020] Figure 3 This is a schematic diagram of the liquid extraction assembly in this utility model;

[0021] Figure 4 This is a schematic diagram of the sampling component in this utility model.

[0022] In the picture:

[0023] 10. Extraction assembly; 11. Extraction box; 12. Drain valve; 13. Drain pipe;

[0024] 20. Vacuum pumping assembly; 21. Vacuum pump; 22. Evacuation pipe;

[0025] 30. Liquid inlet assembly; 31. Liquid inlet valve; 32. Liquid inlet pipe; 33. Liquid outlet pipe;

[0026] 40. Liquid extraction assembly; 41. Liquid extraction pump; 42. Suction tube; 43. Liquid extraction tube; 44. Three-way valve; 45. Sampling tube; 46. Reflux tube;

[0027] 50. Sampling assembly; 51. Sampling bottle; 52. One-way suction valve; 53. Suction cylinder; 54. Connecting pipe. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0029] It should be noted that all directional indications in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0030] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0031] In related technologies, oil storage tanks are used to extract oil. Before extraction, the waste liquid at the bottom of the transformer tank needs to be drained and then collected for sampling. When draining the waste liquid, most of the oil is drained, resulting in a waste of transformer oil during extraction.

[0032] To address certain issues in related technologies, this application provides a transformer oil extraction device. The device comprises an extraction component connected to the extraction port and inlet port of the transformer oil tank via an inlet component and a pumping component, respectively. The pumping component has two ports: one connected to a sampling component, and the other returning the oil to the transformer oil tank via the inlet port. During transformer oil extraction, the extraction component collects and stores the oil. After a period of settling, impurities in the oil settle at the bottom of the tank. The pumping component then pumps the oil above the sediment into the sampling component. After extraction, the oil is returned to the transformer oil tank via the pumping component. This method allows for transformer oil extraction without discharging waste liquid, and the clear oil above the sediment can be returned to the transformer oil tank after sampling, effectively preventing transformer oil waste.

[0033] This application is described below with reference to the accompanying drawings and specific embodiments:

[0034] Combination Figures 1-4This application provides a transformer oil extraction device, including an extraction assembly 10, which includes an extraction box 11; a drain valve 12 fixedly connected to the bottom drain end of the extraction box 11; and a drain pipe 13 fixedly connected to the drain end of the drain valve 12.

[0035] Extraction box 11 stores and collects transformer oil. After extraction is completed, the waste liquid at the bottom can be discharged through the drain pipe 13 by opening the drain valve 12.

[0036] The extraction assembly 10 is provided with a vacuum pumping assembly 20 at the extraction end. The vacuum pumping assembly 20 includes a vacuum pump 21 and an extraction pipe 22, which is fixedly connected to the extraction end of the extraction box 11 and connected to the extraction end of the vacuum pump 21 at the other end.

[0037] During extraction, the vacuum pump 21 is turned on, and the vacuum pump 21 draws out the air in the extraction box 11 through the air extraction pipe 22, so that the extraction box 11 is in a vacuum negative pressure state.

[0038] The top liquid inlet of the extraction assembly 10 is provided with a liquid inlet assembly 30. One end of the liquid inlet assembly 30 is connected to the extraction end of the transformer oil tank. The liquid inlet assembly 30 includes a liquid inlet valve 31; a liquid inlet pipe 32, which is set at the top liquid inlet of the extraction box 11 and is connected to one port of the liquid inlet valve 31; and a liquid outlet pipe 33, which is set at the extraction port of the transformer oil tank and is connected to the other port of the liquid inlet valve 31.

[0039] During extraction, by opening the inlet valve 31, the oil in the transformer oil tank is allowed to enter the inlet pipe 32 through the outlet pipe 33 under negative pressure, thus completing the extraction of transformer oil.

[0040] The extraction assembly 10 has a liquid extraction assembly 40 at its outlet end. The liquid extraction assembly 40 includes a liquid extraction pump 41, which is located at the outlet end of the extraction assembly 10; a suction pipe 42, which is fixedly connected to the suction end of the liquid extraction pump 41; a liquid extraction pipe 43, which is fixedly connected to the outlet end of the liquid extraction pump 41; a three-way valve 44, which is fixedly connected to the top end of the liquid extraction pipe 43; a sampling pipe 45, which is located on one port of the three-way valve 44; and a return pipe 46, which is located on the other port of the three-way valve 44, with one end connected to the inlet end of the transformer oil tank.

[0041] After the transformer oil is extracted, it can be left to stand for about 15 minutes to allow impurities in the oil to settle to the bottom of the extraction tank 11. At this time, the three-way valve 44 is opened to connect the extraction pipe 43 with the sampling pipe 45. Then, the extraction pump 41 is started to draw the oil in the extraction tank 11 into the extraction pipe 43 through the suction pipe 42. The oil is then taken into the sampling assembly 50 through the sampling pipe 45. After the sampling is completed, the three-way valve 44 is opened to connect the extraction pipe 43 with the return pipe 46. The extraction pump 41 is started to draw the oil in the extraction tank 11 into the extraction pipe 43 through the suction pipe 42. The oil is then returned to the transformer oil tank through the return pipe 46.

[0042] One end of the sampling tube 45 is connected to a sampling assembly 50, which includes a sampling bottle 51; a one-way air extraction valve 52, which is located on the top port of the sampling bottle 51; an air extraction cylinder 53, which is located at the air extraction end of the one-way air extraction valve 52; and a connecting tube 54, which is fixedly connected to the liquid inlet end of the one-way air extraction valve 52.

[0043] During sampling, the air in the sampling bottle 51 is extracted by the vacuum pump 53, so that the oil can enter the sampling bottle 51 through the connecting pipe 54 for sampling.

[0044] In some embodiments, the outer wall of the sampling bottle 51 is provided with a graduated observation window.

[0045] In some embodiments, the top of the sampling bottle 51 is detachably connected to the one-way suction valve 52 by means of threads, and the sampling bottle 51 can be quickly replaced by means of threads.

[0046] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0047] Furthermore, the technical solutions of the various embodiments can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0048] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A transformer oil extraction device, comprising an extraction component (10); Its features are: The extraction component (10) is equipped with a vacuum pumping component (20) at its extraction end. The top liquid inlet of the extraction component (10) is provided with a liquid inlet component (30), one end of which is connected to the extraction end of the transformer oil tank. The extraction component (10) is provided with a liquid extraction component (40) at its liquid outlet end. The liquid extraction component (40) includes: A liquid pump (41) is installed at the liquid outlet end of the extraction assembly (10); The suction tube (42) is fixedly connected to the suction end of the pump (41); The liquid extraction tube (43) is fixedly connected to the liquid outlet end of the liquid extraction pump (41); A three-way valve (44) is fixedly connected to the top of the liquid extraction tube (43); A sampling tube (45) is disposed on one port of the three-way valve (44); The return pipe (46) is located on the other end of the three-way valve (44), with one end connected to the inlet of the transformer oil tank; One end of the sampling tube (45) is connected to a sampling assembly (50), the sampling assembly (50) comprising: Sampling bottle (51); A one-way suction valve (52) is provided on the top port of the sampling bottle (51); An air extraction cylinder (53) is provided at the air extraction end of the one-way air extraction valve (52); The connecting pipe (54) is fixedly connected to the liquid inlet end of the one-way air extraction valve (52).

2. The transformer oil extraction device according to claim 1, characterized in that: The extraction component (10) includes: Extraction box (11); A drain valve (12) is fixedly connected to the bottom drain end of the extraction box (11); The drain pipe (13) is fixedly connected to the drain end of the drain valve (12).

3. The transformer oil extraction device according to claim 1, characterized in that: The vacuum pumping assembly (20) includes: vacuum pump (21); The suction pipe (22) is fixedly connected to the suction end of the extraction component (10), and the other end is connected to the suction end of the vacuum pump (21).

4. The transformer oil extraction device according to claim 1, characterized in that: The liquid inlet assembly (30) includes: Inlet valve (31); The liquid inlet pipe (32) is located at the top liquid inlet end of the extraction assembly (10), and one end is connected to one port of the liquid inlet valve (31); The outlet pipe (33) is located on the extraction port of the transformer oil tank, and one end is connected to the other end of the inlet valve (31).

5. The transformer oil extraction device according to claim 1, characterized in that: The outer wall of the sampling bottle (51) is provided with a graduated observation window.

6. The transformer oil extraction device according to claim 1, characterized in that: The top of the sampling bottle (51) is detachably connected to the one-way suction valve (52) by means of a thread.

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