Transformer oil filtering device for high altitude area
By designing a transformer oil filtration device for high altitude areas, the problem of traditional oil filtering methods resulting in reduced oil flowability in low temperature environments is solved, and efficient oil filtration and oil filling operations are achieved, which improves overall efficiency and reduces the risk of equipment damage.
Patent Information
- Application Number
- CN202420547298.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-20
- Publication Date
- 2025-03-18
- Estimated Expiration
- 2034-03-20
AI Technical Summary
In high altitude areas, the traditional inverted tank oil filtering method causes the transformer oil to be directly exposed to a low-temperature environment, resulting in an increase in the oil concentration and a decrease in fluidity, which in turn affects the oil filtering efficiency.
A transformer oil filtration device for high altitude areas is designed. Through the oil filter machine, oil tank to be filtered, empty oil tank, oil outlet main pipeline, oil inlet main pipeline, oil injection pipeline and switching valve, the oil tank switching and filtration operation can be achieved without disassembling and assembly of the oil pipeline to avoid direct contact between oil and low temperature.
It effectively avoids the reduction of the fluidity of transformer oil in low-temperature environments, improves the oil filter efficiency, and reduces the risk of pipeline bursting and oil heat loss through the insulation sleeve.
Smart Images
Figure CN222637008U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of transformer oil filtering, in particular to a transformer oil filtering device for high altitude areas. Background Art
[0002] In the State Grid Sichuan-Chongqing UHV AC main grid project, two substations are located in high-altitude areas with an altitude of more than 3,400 meters. During the on-site assembly of power transformers in high-altitude areas, due to the large temperature difference between day and night in high-altitude areas and the long period of low temperature during construction throughout the year, higher requirements are put forward for oil filtering during the assembly of power transformers.
[0003] Generally speaking, oil filtering by tank dumping is usually carried out by disassembling the inlet and outlet oil pipelines to switch the oil tank. Due to the low temperature in high altitude areas, the use of the above-mentioned traditional oil filtering method will cause the transformer oil to be directly exposed to the low temperature environment, thereby increasing the viscosity of the transformer oil and reducing its fluidity, thereby affecting the oil filtering efficiency. Utility Model Content
[0004] The utility model aims to provide a transformer oil filtering device for use in high altitude areas, so as to solve the problem that the traditional inverted tank oil filtering method easily causes the transformer oil to be directly exposed to a low temperature environment, thereby increasing the viscosity of the transformer oil and reducing its fluidity, thereby affecting the oil filtering efficiency.
[0005] The purpose of the utility model can be achieved through the following technical solutions:
[0006] A transformer oil filtering device for use in high altitude areas, comprising:
[0007] The oil filter has an input end connected to an oil outlet main pipeline, and an output end connected to an oil inlet main pipeline; a connecting pipeline is connected between the oil outlet main pipeline and the oil inlet main pipeline, and a connecting valve is installed on the connecting pipeline;
[0008] The oil tank to be filtered is provided in multiple groups and is respectively connected to the main oil outlet pipeline;
[0009] Empty oil tanks, which are provided in multiple groups and are respectively connected to the main oil inlet pipeline;
[0010] An oil injection pipeline is connected to the main oil inlet pipeline, and a switching valve is installed at the connection between the oil injection pipeline and the main oil inlet pipeline;
[0011] Among them, during the oil filtering operation, the switching valve connects the oil inlet main pipeline with the oil filter output end, the oil injection pipeline is closed, and the connecting valve is closed at the same time; during the oil injection operation, the switching valve connects the oil inlet main pipeline with the oil injection pipeline, the oil filter output end is closed, and the connecting valve is opened at the same time.
[0012] As a further solution of the utility model: each oil tank to be filtered is provided with an oil outlet branch pipeline, the oil outlet branch pipeline is connected with the oil outlet main pipeline, and an oil outlet valve is installed on the oil outlet branch pipeline.
[0013] As a further solution of the utility model: each empty oil tank is provided with an oil inlet branch pipeline, the oil inlet branch pipeline is connected with the oil inlet main pipeline, and an oil inlet valve is installed on the oil inlet branch pipeline.
[0014] As a further solution of the utility model: the oil filter includes a shell, in which a filter chamber, an oil inlet chamber and an oil return chamber are respectively arranged; the two ends of the oil inlet chamber are respectively connected to the oil outlet main pipeline and the filter chamber inlet; the two ends of the oil return chamber are respectively connected to the oil inlet main pipeline and the filter chamber outlet, and an oil return pump is also installed in the oil return chamber; a filter assembly is rotatably arranged in the filter chamber.
[0015] As a further solution of the utility model: the filter assembly includes a filter frame, which is open at one end toward the oil inlet chamber, and a plurality of groups of filter screens are detachably installed on the circumferential surface of the filter frame; an arc-shaped partition plate adapted to the filter frame is provided on the side of the filter chamber away from the oil return chamber, and an arc-shaped sealing groove is formed between the arc-shaped partition plate and the inner wall of the filter chamber.
[0016] As a further solution of the utility model: the oil outlet main pipeline, the oil inlet main pipeline, the oil outlet branch pipeline, the oil inlet branch pipeline, the oil injection pipeline and the connecting pipeline are all wrapped with an insulation sleeve, the insulation sleeve includes an inner insulation layer and an outer protective layer, a supporting skeleton is arranged between the inner insulation layer and the outer protective layer, a plurality of cavities are opened in the circumferential direction of the supporting skeleton, and the cavities are filled with carbon dioxide gas.
[0017] Beneficial effects of the utility model:
[0018] 1. During the oil filtering operation, there is no need to disassemble the inlet and outlet oil pipelines to switch the oil tank. By switching the oil circuit through the corresponding oil tank valve and the switching valve, the transformer oil in the designated oil tank can be filtered and filled with oil, avoiding direct contact between the transformer oil and the low temperature environment to reduce fluidity and improve the oil filtering efficiency;
[0019] 2. A rotating filter frame is installed inside the oil filter, which allows the filter to be switched, disassembled and cleaned without stopping the machine, thus avoiding transformer oil leakage or exposure to low temperature environment, and is easy to operate;
[0020] 3. The outside of the pipeline is wrapped with an insulation sleeve filled with carbon dioxide gas, which has a good insulation effect and effectively prevents pipeline bursting and heat loss from the internal transformer oil. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] The utility model is further described below in conjunction with the accompanying drawings.
[0022] Figure 1 It is a structural schematic diagram of the utility model;
[0023] Figure 2 This is a schematic diagram of the internal structure of the oil filter in the utility model;
[0024] Figure 3 It is a cross-sectional view of the oil filter in the utility model;
[0025] Figure 4 The structure of the filter assembly in the utility model is shown in FIG. Figure 1 ;
[0026] Figure 5 The structure of the filter assembly in the utility model is shown in FIG. Figure 2 ;
[0027] Figure 6 It is a structural schematic diagram of the thermal insulation sleeve in the utility model.
[0028] In the figure: 1. oil tank to be filtered; 2. empty oil tank; 3. oil filter; 31. shell; 32. filter chamber; 33. oil inlet chamber; 34. oil return chamber; 35. oil return pump; 36. arc partition; 37. filter frame; 38. filter screen; 39. handle; 310. turntable; 4. oil outlet main pipeline; 5. oil inlet main pipeline; 6. oil outlet branch pipeline; 7. oil inlet branch pipeline; 8. oil injection pipeline; 9. connecting pipeline; 10. switching valve; 11. connecting valve; 12. oil outlet valve; 13. oil inlet valve; 100. pipe body; 110. inner insulation layer; 120. outer protective layer; 130. supporting frame; 140. cavity. DETAILED DESCRIPTION
[0029] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.
[0030] See also Figure 1The utility model discloses a transformer oil filtering device for high altitude areas, comprising an oil tank to be filtered 1, an empty oil tank 2, an oil filter 3, an oil outlet main pipeline 4, an oil inlet main pipeline 5, an oil injection pipeline 8 and a switching valve 10; the input end of the oil filter 3 is connected to the oil outlet main pipeline 4, and the output end is connected to the oil inlet main pipeline 5; the oil tank to be filtered 1 is provided with multiple groups and are respectively connected to the oil outlet main pipeline 4; the empty oil tank 2 is provided with multiple groups and are respectively connected to the oil inlet main pipeline 5; the oil injection pipeline 8 is connected to the oil inlet main pipeline 5, and a switching valve 10 is installed at the connection between the oil injection pipeline 8 and the oil inlet main pipeline 5; during the oil filtering operation, the switching valve 10 connects the oil inlet main pipeline 5 with the output end of the oil filter 3, and the oil injection pipeline 8 is closed; during the oil injection operation, the switching valve 10 connects the oil inlet main pipeline 5 with the oil injection pipeline 8, and the output end of the oil filter 3 is closed;
[0031] Specifically, when it is necessary to filter the transformer oil in the oil tank to be filtered 1, the switching valve 10 is adjusted to connect the output end of the oil filter 3 with the oil inlet main pipeline 5, and the oil filling pipeline 8 is closed at the same time. The transformer oil in the oil tank to be filtered 1 flows into the oil filter 3 through the oil outlet main pipeline 4. After the impurities are filtered out by the oil filter 3, the clean transformer oil flows from the output end of the oil filter 3 into the oil inlet main pipeline 5 and finally enters the empty oil tank 2 for storage; when it is necessary to fill the empty oil tank 2 with oil, the switching valve 10 is adjusted to close the output end of the oil filter 3, and the oil filling pipeline 8 is connected with the oil inlet main pipeline 5 at the same time, so that the external transformer oil can be injected into the empty oil tank 2 through the oil filling pipeline 8 and the oil inlet main pipeline 5.
[0032] For further information, see Figure 1 In order to filter the transformer oil in the designated oil tank 1 to be filtered, each oil tank 1 to be filtered is provided with an oil outlet branch pipe 6, the oil outlet branch pipe 6 is connected with the oil outlet main pipe 4, and an oil outlet valve 12 is installed on the oil outlet branch pipe 6; when it is necessary to filter the transformer oil in one or more groups of oil tanks 1 to be filtered, the oil outlet valve 12 on the corresponding oil tank 1 to be filtered is opened, and the oil outlet valves 12 on the other groups of oil tanks 1 to be filtered are closed, and the oil filter 3 is turned on, so that the transformer oil in the designated oil tank 1 to be filtered can be filtered;
[0033] Similarly, in order to realize the filling of designated empty oil tanks 2 with oil, each empty oil tank 2 is provided with an oil inlet branch pipe 7, the oil inlet branch pipe 7 is connected with the oil inlet main pipe 5, and the oil inlet branch pipe 7 is installed with an oil inlet valve 13; when it is necessary to fill one or more groups of empty oil tanks 2 with oil, the oil inlet valve 13 on the corresponding empty oil tank 2 is opened, and the oil inlet valves 13 on other groups of empty oil tanks 2 are closed, so that the designated empty oil tank 2 can be filled with oil.
[0034] For further information, see Figure 1In order to facilitate the oil filling operation so that the empty oil tank 2 and the oil tank to be filtered 1 can be filled with oil at the same time, a connecting pipe 9 is connected between the oil outlet main pipe 4 and the oil inlet main pipe 5, and a connecting valve 11 is installed on the connecting pipe 9;
[0035] When performing the oil filtering operation, the connecting valve 11 is closed to disconnect the oil outlet main pipeline 4 and the oil inlet main pipeline 5. The transformer oil in the oil tank 1 to be filtered enters the oil filter 3 through the oil outlet main pipeline 4, flows out from the oil filter 3 after filtering, and then enters the empty oil tank 2 through the oil inlet main pipeline 5, which will not affect the normal operation of the oil filtering.
[0036] During the oil filling operation, the connecting valve 11 is opened to connect the oil outlet main pipeline 4 and the oil inlet main pipeline 5, and the external transformer oil can enter the oil inlet main pipeline 5 through the oil filling pipeline 8. A part of the transformer oil directly enters the empty oil tank 2, and the other part of the transformer oil enters the oil outlet main pipeline 4 through the connecting pipeline 9, and finally enters the corresponding oil tank 1 to be filtered, thereby realizing the synchronous oil filling of the empty oil tank 2 and the oil tank 1 to be filtered.
[0037] In one embodiment, see Figure 2 and Figure 3 The oil filter 3 includes a housing 31, in which a filter chamber 32, an oil inlet chamber 33 and an oil return chamber 34 are respectively arranged; the two ends of the oil inlet chamber 33 are respectively connected to the oil outlet main pipeline 4 and the inlet of the filter chamber 32; the two ends of the oil return chamber 34 are respectively connected to the oil inlet main pipeline 5 and the outlet of the filter chamber 32, and an oil return pump 35 is also installed in the oil return chamber 34; a filter assembly is rotatably arranged in the filter chamber 32;
[0038] Specifically, under the pumping pressure of the oil return pump 35, the transformer oil to be filtered enters the oil inlet chamber 33 through the oil outlet main pipe 4, and then enters the filter chamber 32 from the inlet of the filter chamber 32. After the impurities are filtered out by the filter assembly, the clean transformer oil enters the oil return chamber 34 from the outlet of the filter chamber 32, and finally is pumped into the oil inlet main pipe 5 by the oil return pump 35, thereby realizing the filtering operation of the transformer oil.
[0039] See also Figure 4 and Figure 5The filter assembly includes a filter frame 37, which is open toward one end of the oil inlet chamber 33, and a plurality of groups of filter screens 38 are detachably installed on the circumferential surface of the filter frame 37; an arc-shaped partition plate 36 adapted to the filter frame 37 is provided on the side of the filter chamber 32 away from the return oil chamber 34, and an arc-shaped sealing groove is formed between the arc-shaped partition plate 36 and the inner wall of the filter chamber 32; when installing the filter assembly, the filter frame 37 is inserted into the filter chamber 32, so that one group of filter screens 38 is aligned with the return oil chamber 34, and the other groups of filter screens 38 are sealed in the arc-shaped sealing groove; the transformer oil to be filtered enters the filter frame 37 from the opening at one end of the filter frame 37, and then enters the return oil chamber 34 through the filter screen 38 on its side wall, and the impurities in the transformer oil are intercepted by the filter screen 38 inside the filter frame 37;
[0040] When the group of filters 38 has been used for a long time or has a lot of impurities retained on it, which affects the filtering effect, the filter frame 37 can be rotated to make an adjacent group of clean filters 38 rotate out of the arc-shaped sealing groove and align with the oil return chamber 34. At the same time, the group of filters 38 is rotated into the arc-shaped sealing groove. Then, the group of filters 38 can be pulled out from the filter frame 37 for cleaning or replacement.
[0041] In addition, each filter 38 is provided with a handle 39 to facilitate the disassembly and assembly of the filter 38 ; a turntable 310 is installed in the center of the filter frame 37 to facilitate the rotation operation of the filter frame 37 to switch different filters 38 .
[0042] In yet another embodiment, see Figure 6 The oil outlet main pipeline 4, the oil inlet main pipeline 5, the oil outlet branch pipeline 6, the oil inlet branch pipeline 7, the oil injection pipeline 8 and the connecting pipeline 9 are all wrapped with an insulation sleeve, and the insulation sleeve includes an inner insulation layer 110 and an outer protective layer 120. A support skeleton 130 is arranged between the inner insulation layer 110 and the outer protective layer 120. A plurality of cavities 140 are opened in the circumferential direction of the support skeleton 130, and the cavities 140 are filled with carbon dioxide gas;
[0043] Specifically, the inner insulation layer 110 is wrapped around the outside of the pipe body 100 of the corresponding pipeline, and is mainly used to insulate the pipe body 100, thereby preventing the pipe body 100 from bursting and the heat loss of the internal transformer oil; the specific material of the inner insulation layer 110 is not limited, and it can be polyurethane foam, rock wool, glass wool, etc.; the outer protective layer 120 mainly provides protection against impact, to prevent external impact from causing damage to the internal pipe body 100; the specific material of the outer protective layer 120 is not limited, and it can be polyethylene and polyvinyl chloride, etc.; the support frame 130 mainly supports and fixes the annular space between the inner insulation layer 110 and the outer protective layer 120, and its material is not limited, and it can be a wire mesh frame and a steel belt frame, etc.; the cavity 140 of the support frame 130 is filled with carbon dioxide gas, which is a greenhouse gas and has a good thermal insulation effect, thereby further reducing the heat loss of the transformer oil in the pipe body 100.
[0044] In summary, the utility model can filter and inject oil into transformer oil by the following methods:
[0045] During the oil filtering operation, the oil inlet main pipeline 5 is connected to the output end of the oil filter 3 through the switching valve 10, and the oil filling pipeline 8 is closed; the connecting valve 11 is closed to disconnect the oil outlet main pipeline 4 and the oil inlet main pipeline 5; the transformer oil in the oil tank 1 to be filtered enters the oil filter 3 through the oil outlet main pipeline 4, flows out from the oil filter 3 after filtering, enters the oil inlet main pipeline 5, and finally enters the empty oil tank 2;
[0046] During the oil filling operation, the oil inlet main pipeline 5 is connected to the oil filling pipeline 8 through the switching valve 10, and the output end of the oil filter 3 is closed; the connecting valve 11 is opened to connect the oil outlet main pipeline 4 and the oil inlet main pipeline 5; the external transformer oil enters the oil inlet main pipeline 5 through the oil filling pipeline 8, a part of the transformer oil directly enters the empty oil tank 2, and the other part of the transformer oil enters the oil outlet main pipeline 4 through the connecting pipeline 9, and finally enters the corresponding oil tank 1 to be filtered.
[0047] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.
Claims
1. A transformer oil filter for high altitude areas, characterized in that: include: The oil filter (3) has an input end connected to an oil outlet main pipeline (4), and an output end connected to an oil inlet main pipeline (5); a connecting pipeline (9) is connected between the oil outlet main pipeline (4) and the oil inlet main pipeline (5), and a connecting valve (11) is installed on the connecting pipeline (9); The oil tank to be filtered (1) is provided in multiple groups and is respectively connected to the oil outlet main pipeline (4); Empty oil tanks (2), which are provided in multiple groups and are respectively connected to the oil inlet main pipeline (5); An oil injection pipeline (8) which is in communication with the main oil inlet pipeline (5), wherein a switching valve (10) is installed at the connection between the oil injection pipeline (8) and the main oil inlet pipeline (5); During the oil filtering operation, the switching valve (10) connects the main oil inlet pipeline (5) with the output end of the oil filter (3), the oil injection pipeline (8) is closed, and the connecting valve (11) is closed at the same time; during the oil injection operation, the switching valve (10) connects the main oil inlet pipeline (5) with the oil injection pipeline (8), the output end of the oil filter (3) is closed, and the connecting valve (11) is opened at the same time.
2. A transformer oil filter for high altitude areas according to claim 1, characterized in that: Each oil tank to be filtered (1) is provided with an oil outlet branch pipeline (6), the oil outlet branch pipeline (6) is connected to the oil outlet main pipeline (4), and an oil outlet valve (12) is installed on the oil outlet branch pipeline (6).
3. A transformer oil filter for high altitude areas according to claim 2, characterized in that: Each empty oil tank (2) is provided with an oil inlet branch pipeline (7), the oil inlet branch pipeline (7) is connected to the oil inlet main pipeline (5), and an oil inlet valve (13) is installed on the oil inlet branch pipeline (7).
4. The transformer oil filter device for high altitude areas according to claim 1, characterized in that: The oil filter (3) comprises a housing (31), wherein a filter chamber (32), an oil inlet chamber (33) and an oil return chamber (34) are respectively arranged in the housing (31); the two ends of the oil inlet chamber (33) are respectively communicated with the oil outlet main pipeline (4) and the inlet of the filter chamber (32); the two ends of the oil return chamber (34) are respectively communicated with the oil inlet main pipeline (5) and the outlet of the filter chamber (32); an oil return pump (35) is also installed in the oil return chamber (34); and a filter assembly is rotatably arranged in the filter chamber (32).
5. The transformer oil filter device for high altitude areas according to claim 4, characterized in that: The filter assembly comprises a filter frame (37), the filter frame (37) is open at one end facing the oil inlet chamber (33), and a plurality of groups of filter screens (38) are detachably mounted on the circumferential surface of the filter frame (37); an arc-shaped partition plate (36) adapted to the filter frame (37) is arranged on a side of the filter chamber (32) away from the oil return chamber (34), and an arc-shaped sealing groove is formed between the arc-shaped partition plate (36) and the inner wall of the filter chamber (32).
6. The transformer oil filter device for high altitude areas according to claim 1, characterized in that: The oil outlet main pipeline (4), the oil inlet main pipeline (5), the oil outlet branch pipeline (6), the oil inlet branch pipeline (7), the oil injection pipeline (8) and the connecting pipeline (9) are all wrapped with a thermal insulation sleeve, the thermal insulation sleeve comprises an inner thermal insulation layer (110) and an outer protective layer (120), a support frame (130) is arranged between the inner thermal insulation layer (110) and the outer protective layer (120), a plurality of cavities (140) are opened in the inner circumference of the support frame (130), and the cavities (140) are filled with carbon dioxide gas.