Oil filtering device of oil-immersed transformer

Abstract

The utility model discloses an oil filtering device for an oil-immersed transformer, which comprises a filter cartridge, a bent plate, a filter screen, a collecting structure and a scraping structure, and is characterized in that the filter cartridge is communicated with the transformer; the bent plate and the filter screen are sequentially arranged in the filter cartridge to divide the filter cartridge into a settling cavity, a filter cavity and a discharge cavity, and a through hole is formed in the transverse straight surface of the bent plate; the bottoms of the settling cavity and the filtering cavity are communicated with collecting structures; the scraping structure is arranged in the filtering cavity and comprises a rotating shaft, an impeller and a scraping plate, and the rotating shaft is rotatably arranged between the bent plate and the filtering net; the impeller is arranged at one end of the rotating shaft and directly faces the through hole; the scraping plate is arranged at the other end of the rotating shaft and is attached to the filter screen. According to the utility model, the filter cartridge is divided into a plurality of chambers, so that impurities can be better separated when oil is subjected to multiple filtration, the filtration efficiency is improved, the arranged scraping structure can automatically scrape blockages on the filter screen in the flowing process of the oil, and the cleaning frequency of the filter screen is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of transformers, and particularly relates to an oil-immersed transformer oil filtering device. Background Art

[0002] Oil-immersed transformers play a crucial role in the power system. However, due to long-term operation, the insulating oil inside the transformer may be contaminated, resulting in a decline in electrical performance.

[0003] Therefore, it is necessary to filter the insulating oil inside the transformer regularly. Although the existing transformer oil filtering devices can achieve a certain degree of oil filtration, there are some deficiencies in actual applications.

[0004] For example, the existing oil filtering devices usually only have a filter screen to isolate impurities such as particulate matter. However, due to the single filtering method, the filtering efficiency is average, and the filter screen is prone to clogging after being used for a period of time, requiring frequent replacement. Summary of the Utility Model

[0005] The utility model aims to solve at least one of the technical problems in the above-mentioned technologies to a certain extent.

[0006] To achieve the above object, a first aspect of the utility model proposes an oil-immersed transformer oil filtering device, including: a filter cylinder, a bent plate, a filter screen, a collection structure, and a scraping structure. Among them, both ends of the filter cylinder are respectively communicated with the oil inlet end and the oil outlet end of the transformer; the bent plate and the filter screen are sequentially arranged in the filter cylinder along the oil inlet direction to divide the filter cylinder into a sedimentation chamber, a filtration chamber, and a discharge chamber. Among them, through holes are opened on the horizontal and vertical surfaces of the bent plate; collection structures are communicated with the bottoms of both the sedimentation chamber and the filtration chamber; the scraping structure is arranged in the filtration chamber, and the scraping structure includes a rotating shaft, an impeller, and a scraping plate. Among them, the rotating shaft is rotatably arranged between the bent plate and the filter screen; the impeller is arranged at one end of the rotating shaft and is opposite to the through hole; the scraping plate is arranged at the other end of the rotating shaft and is attached to the filter screen to scrape off the blockages on the filter screen.

[0007] In addition, the oil-immersed transformer oil filtering device proposed by the utility model as above may also have the following additional technical features:

[0008] As a further description of the above technical solution: one end of the filter cylinder is communicated with an oil inlet pipeline, and the oil inlet pipeline is connected to the bottom oil outlet end of the transformer; the other end of the filter cylinder is communicated with an oil outlet pipeline, and the oil outlet pipeline is connected to the upper oil inlet end of the transformer.

[0009] As a further description of the above technical solution: an installation bracket is provided on the filter cartridge, and the installation bracket is fixed on the transformer.

[0010] As a further description of the above technical solution: the collection structure includes an aggregate hopper, a connecting pipe, and a collection chamber. Among them, the aggregate hopper is communicatively provided at the bottom of the filter cartridge; the aggregate hopper, the connecting pipe, and the collection chamber are communicatively connected in sequence; a switching valve is provided on the connecting pipe; a detachable oil drain bolt is provided at the bottom of the collection chamber.

[0011] As a further description of the above technical solution: both ends of the rotating shaft are pivotally connected to the bent plate and the filter screen respectively.

[0012] As a further description of the above technical solution: a flexible scraping blade is provided on one side of the scraper close to the filter screen to improve the fitting degree with the filter screen.

[0013] As a further description of the above technical solution: one end of the bent plate is connected to the bottom of the filter cartridge, and the other end extends along the oil outlet direction and then vertically upward to be connected to the top of the filter cartridge.

[0014] According to the oil-immersed transformer oil filtering device of the present utility model, by providing a bent plate and a filter screen, the filter cartridge is divided into a sedimentation chamber, a filtration chamber, and a discharge chamber, so that impurities can be better separated when the oil liquid passes through multiple filtrations, improving the filtration efficiency. The provided scraping structure can automatically scrape the blockages on the filter screen during the flow of the oil liquid, reducing the cleaning frequency of the filter screen and lowering the maintenance cost.

[0015] Additional aspects and advantages of the present utility model will be given in part in the following description, become apparent in part from the following description, or be understood through the practice of the present utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above and / or additional aspects and advantages of the present utility model will become apparent and be readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0017] Figure 1 is an installation schematic diagram of an oil-immersed transformer oil filtering device according to an embodiment of the present utility model;

[0018] Figure 2 is a structural schematic diagram of an oil-immersed transformer oil filtering device according to an embodiment of the present utility model;

[0019] Figure 3 is a partial enlarged structural schematic diagram of A according to an embodiment of the present utility model;

[0020] Figure 4It is a schematic internal structure diagram of an oil-immersed transformer oil filtering device according to an embodiment of the present utility model;

[0021] As shown in the figure:

[0022] 100. Transformer; 200. Filter cartridge; 201. Oil inlet pipeline; 202. Oil outlet pipeline; 203. Installation bracket; 210. Sedimentation chamber; 220. Filtration chamber; 230. Discharge chamber; 300. Bending plate; 301. Through hole; 400. Filter screen; 500. Collection structure; 510. Aggregate hopper; 520. Connecting pipe; 530. Collection chamber; 531. Drain bolt; 600. Scraping structure; 610. Rotating shaft; 620. Impeller; 630. Scraper. Detailed implementation manners

[0023] The embodiments of the present utility model will be described in detail below. The examples of the embodiments are shown in the drawings, in which the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are intended to explain the present utility model, and should not be construed as limiting the present utility model.

[0024] The oil-immersed transformer oil filtering device according to the embodiment of the present utility model will be described below with reference to the drawings.

[0025] As Figure 1 and Figure 4 shown, the oil-immersed transformer oil filtering device according to the embodiment of the present utility model may include a filter cartridge 200, a bending plate 300, a filter screen 400, a collection structure 500, and a scraping structure 600.

[0026] Among them, both ends of the filter cartridge 200 are respectively communicated with the oil inlet end and the oil outlet end of the transformer 100. The bending plate 300 and the filter screen 400 are sequentially arranged in the filter cartridge 200 along the oil inlet direction to divide the filter cartridge 200 into a sedimentation chamber 210, a filtration chamber 220, and a discharge chamber 230. Among them, through holes 301 are formed on the horizontal and vertical surfaces of the bending plate 300.

[0027] In an embodiment of the present utility model, one end of the bending plate 300 is connected to the bottom of the filter cartridge 200, and the other end extends along the oil outlet direction and then vertically upward and is connected to the top of the filter cartridge 200. Among them, the through holes 301 are formed on the extending end surface of the bending plate 300 along the oil outlet direction.

[0028] It should be noted that when filtering the insulating oil in the transformer 100, the oil liquid first enters the sedimentation chamber 210, then part of the large specific gravity particles in the oil liquid first settle, and then the oil liquid is discharged into the filtration chamber 220 through the through holes 301, filtered through the filter screen 400, and then flows back into the transformer 100 from the discharge chamber 230.

[0029] A collecting structure 500 is connected to the bottom of both the sedimentation chamber 210 and the filtration chamber 220 for collecting impurities in their respective chambers respectively.

[0030] As Figure 4 shown, a scraping structure 600 is arranged in the filtration chamber 220. The scraping structure 600 includes a rotating shaft 610, an impeller 620 and a scraping plate 630.

[0031] Among them, the rotating shaft 610 is rotatably arranged between the bent plate 300 and the filter screen 400. The impeller 620 is arranged at one end of the rotating shaft 610 and faces the through hole 301. The scraping plate 630 is arranged at the other end of the rotating shaft 610 and is attached to the filter screen 400 to scrape off the blockages on the filter screen 400.

[0032] It should be noted that both ends of the rotating shaft 610 are pivotally connected to the bent plate 300 and the filter screen 400 respectively. In addition, a flexible scraping blade is arranged on the side of the scraping plate 630 close to the filter screen 400 to improve the degree of fit with the filter screen 400.

[0033] Specifically, when the relevant staff regularly filters the insulating oil in the transformer 100, first, the oil in the transformer 100 enters from the sedimentation chamber 210 of the filter cartridge 200. Due to the blockage of the bent plate 300, some impurities with a large specific gravity such as particles begin to settle to the bottom of the sedimentation chamber 210 and enter the corresponding collecting structure �00.

[0034] Then, the oil discharges from the through hole 301 on the bent plate 300 and impacts the impeller 620, causing the impeller 620 to drive the rotating shaft 610 and the scraping plate 630 to rotate. Then, the scraping plate 630 continuously scrapes the filter screen 400 during the rotation process to prevent impurities from blocking the filter screen 400. The sundries in the filtration chamber 220 are blocked by the filter screen 400, and the clean oil enters the discharge chamber 230 from the filter screen 400 and then flows back into the transformer 100.

[0035] The impurities in the filtration chamber 220 settle into the corresponding collecting structure 500 after the filtration stops.

[0036] The relevant staff can discharge the impurities in it by opening the collecting structure 500.

[0037] In an embodiment of the present utility model, as Figure 1 and Figure 2 shown, an oil inlet pipeline 201 is connected to one end of the filter cartridge 200, and the oil inlet pipeline 201 is connected to the bottom oil outlet end of the transformer 100; the other end of the filter cartridge 200 is connected to an oil outlet pipeline 202, and the oil outlet pipeline 202 is connected to the oil inlet end of the upper part of the transformer 100. An installation bracket 203 is arranged on the filter cartridge 200, and the installation bracket 203 is fixed on the transformer 100.

[0038] It should be noted that an oil filling hole is provided on the top of the filter cartridge 200, and a sealing plug is plugged on the oil filling hole to facilitate relevant staff to add insulating oil. At the same time, an observation port can be opened on the filter cartridge 200 to observe the oil position.

[0039] It is understandable that valves are provided on both the oil inlet pipeline 201 and the oil outlet pipeline 202. When filtering is performed regularly, relevant staff can open the valves to allow the oil to enter the filter cartridge 200, or keep the valves normally open to achieve continuous filtration of the oil.

[0040] In one embodiment of the present invention, Figure 3 As shown, the collecting structure 500 includes a collecting hopper 510 , a connecting pipe 520 and a collecting chamber 530 .

[0041] Among them, the collecting hopper 510 is connected and arranged at the bottom of the filter cartridge 200. The collecting hopper 510, the connecting pipe 520 and the collecting chamber 530 are connected in sequence. A switch valve is provided on the connecting pipe 520, and a detachable oil drain bolt 531 is provided at the bottom of the collecting chamber 530.

[0042] It should be noted that when the relevant staff discharges the impurities in the collection structure 500, they can remove the oil drain bolt 531 to discharge part of the oil and the impurities together.

[0043] It is understandable that when the relevant staff discharges the impurities, they can close the switch valve on the connecting pipe 520 to prevent the oil in the filter cartridge 200 from being discharged when the impurities are discharged. Due to the setting of the switch valve on the connecting pipe 520, impurities can be discharged during the filtration process, and impurities can be discharged without stopping and waiting.

[0044] In summary, according to the oil-immersed transformer oil filter device of the embodiment of the present invention, by providing a bending plate 300 and a filter screen 400, the filter cartridge 200 is divided into a sedimentation chamber 210, a filter chamber 220 and a discharge chamber 230, so that the oil can better separate impurities when undergoing multiple filtrations, thereby improving the filtration efficiency. The scraping structure 600 provided can automatically scrape off blockages on the filter screen 400 during the flow of the oil, thereby reducing the cleaning frequency of the filter screen 400 and reducing maintenance costs.

[0045] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of such features. In the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0046] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples", etc. mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0047] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. An oil-immersed transformer oil filtering device, characterized in that, Comprising: A filter cartridge (200), a bending plate (300), a filter screen (400), a collection structure (500) and a scraping structure (600), wherein, Both ends of the filter cartridge (200) are respectively communicated with the oil inlet end and the oil outlet end of the transformer (100); The bending plate (300) and the filter screen (400) are sequentially arranged in the filter cartridge (200) along the oil inlet direction to divide the filter cartridge (200) into a sedimentation chamber (210), a filtration chamber (220) and a discharge chamber (230), wherein, through holes (301) are formed in the horizontal and vertical surfaces of the bending plate (300); The collection structure (500) is communicated with the bottoms of both the sedimentation chamber (210) and the filtration chamber (220); The scraping structure (600) is arranged in the filtration chamber (220), and the scraping structure (600) includes a rotating shaft (610), an impeller (620) and a scraping plate (630), wherein, The rotating shaft (610) is rotatably arranged between the bending plate (300) and the filter screen (400); The impeller (620) is arranged at one end of the rotating shaft (610) and faces the through hole (301); The scraping plate (630) is arranged at the other end of the rotating shaft (610) and is attached to the filter screen (400) to scrape off the blockages on the filter screen (400).

2. The oil-immersed transformer oil filtering device according to claim 1, wherein One end of the filter cartridge (200) is communicated with an oil inlet pipeline (201), and the oil inlet pipeline (201) is connected to the bottom oil outlet end of the transformer (100); the other end of the filter cartridge (200) is communicated with an oil outlet pipeline (202), and the oil outlet pipeline (202) is connected to the oil inlet end of the upper part of the transformer (100).

3. The oil filter device for an oil-immersed transformer according to claim 1, characterized in that, An installation bracket (203) is arranged on the filter cartridge (200), and the installation bracket (203) is fixed on the transformer (100).

4. The oil filter device for an oil-immersed transformer according to claim 1, wherein The collection structure (500) includes an aggregate hopper (510), a connecting pipe (520) and a collection chamber (530), wherein, The aggregate hopper (510) is communicated and arranged at the bottom of the filter cartridge (200); The aggregate hopper (510), the connecting pipe (520) and the collection chamber (530) are sequentially communicated; A switching valve is arranged on the connecting pipe (520); A detachable oil drain bolt (531) is arranged at the bottom of the collection chamber (530).

5. The oil filter device for an oil-immersed transformer according to claim 1, wherein Both ends of the rotating shaft (610) are respectively pivotally connected to the bending plate (300) and the filter screen (400).

6. The oil filter device for an oil-immersed transformer according to claim 1, characterized in that, A flexible scraping blade is arranged on one side of the scraping plate (630) close to the filter screen (400) to improve the degree of fitting with the filter screen.

7. The oil filtering device for an oil-immersed transformer according to claim 1, wherein One end of the bending plate (300) is connected to the bottom of the filter cartridge (200), and after the other end extends along the oil outlet direction, it extends vertically upward and is connected to the top of the filter cartridge (200).

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