Insulating oil anti-oxidation filtering device and method

Abstract

The invention relates to an anti-oxidation filtering device and method for insulating oil. The insulating oil anti-oxidation filtering device comprises an oil inlet mechanism, an oil outlet mechanism, an oil delivery pump, a filtering mechanism and an anti-oxidation mechanism, the oil inlet mechanism comprises an oil inlet pipeline and an oil inlet valve, the oil inlet pipeline is provided with a first oil inlet and a first oil outlet, and the oil inlet valve is installed on the oil inlet pipeline. The oil outlet mechanism comprises an oil outlet pipeline and an oil outlet valve, the oil outlet pipeline is provided with a second oil inlet and a second oil outlet, and the oil outlet valve is installed on the oil outlet pipeline. The oil delivery pump is connected with the first oil outlet and the second oil inlet. The filtering mechanism is installed on the oil inlet pipeline and / or the oil outlet pipeline. The anti-oxidation mechanism comprises a gas storage bottle and a gas inlet valve, the gas inlet valve is connected to the oil inlet pipeline, and a gas outlet of the gas storage bottle is connected with the gas inlet The anti-oxidation filtering device and the anti-oxidation filtering method for the insulating oil have the advantages of pollution and oxidation prevention and good safety.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of electrical maintenance equipment, in particular to an insulating oil anti-oxidation filtering device and method. BACKGROUND

[0002] Natural ester insulating oil is widely used in electrical equipment. If the natural ester insulating oil is oxidized, the insulating performance of the natural ester insulating oil will be reduced, thereby affecting the safe operation of the electrical equipment.

[0003] In the maintenance stage of a transformer, a natural ester insulating oil filtering device is needed to filter the natural ester insulating oil and replace the natural ester insulating oil into the transformer, so as to maintain the insulating performance inside the transformer. However, there is long-time residual natural ester insulating oil inside the natural ester insulating oil filtering device, and the residual natural ester insulating oil is prone to oxidation, thereby causing pollution to the filtered natural ester insulating oil and leading to safety problems. SUMMARY

[0004] Therefore, it is necessary to provide an insulating oil anti-oxidation filtering device and method in view of the problems that the natural ester insulating oil filtering device is prone to oxidation and has great safety hazards.

[0005] The application provides an insulating oil anti-oxidation filtering device, which comprises:

[0006] An oil inlet mechanism, which comprises an oil inlet pipeline and an oil inlet valve, one end of the oil inlet pipeline is provided with a first oil inlet port, the other end of the oil inlet pipeline is provided with a first oil outlet port, and the oil inlet valve is installed on the oil inlet pipeline;

[0007] An oil outlet mechanism, which comprises an oil outlet pipeline and an oil outlet valve, one end of the oil outlet pipeline is provided with a second oil inlet port, the other end of the oil outlet pipeline is provided with a second oil outlet port, and the oil outlet valve is installed on the oil outlet pipeline;

[0008] An oil pump, the input end of the oil pump is connected to the first oil outlet port, and the output end of the oil pump is connected to the second oil inlet port;

[0009] A filtering mechanism, which is installed on the oil inlet pipeline and / or the oil outlet pipeline;

[0010] An anti-oxidation mechanism, which comprises a gas storage cylinder and an air inlet valve, the air inlet valve is connected to the oil inlet pipeline and / or the oil outlet pipeline, the gas outlet of the gas storage cylinder is connected to the air inlet valve, and the gas storage cylinder is used for storing inert gas.

[0011] In one of the embodiments, the anti-oxidation mechanism further comprises a safety valve, which is installed on the gas outlet of the gas storage cylinder.

[0012] In one of the embodiments, the anti-oxidation mechanism further comprises a high-pressure gas pipe, one end of the high-pressure gas pipe is connected to the gas outlet of the gas cylinder, and the other end of the high-pressure gas pipe is connected to the gas inlet valve.

[0013] In one of the embodiments, the filtering mechanism comprises a first filter and a second filter, the first filter is installed on the oil inlet pipe, and the first filter is arranged on the oil inlet pipe between the oil inlet valve and the first oil outlet, the second filter is installed on the oil outlet pipe, and the second filter is arranged on the oil outlet pipe between the second oil inlet and the oil outlet valve.

[0014] In one of the embodiments, the filtering mechanism further comprises a pressure switch and a pressure gauge, both the pressure switch and the pressure gauge are installed on the oil outlet pipe, and both the pressure switch and the pressure gauge are arranged on the oil outlet pipe between the second oil inlet and the second filter.

[0015] In one of the embodiments, the oil outlet mechanism further comprises a sampling valve, the sampling valve is installed on the oil outlet pipe, and the sampling valve is arranged on the oil outlet pipe between the second filter and the oil outlet valve.

[0016] In one of the embodiments, the filtering mechanism further comprises an exhaust valve, the second filter is provided with an exhaust port, and the exhaust valve is installed on the exhaust port.

[0017] In one of the embodiments, the insulation oil anti-oxidation filtering device further comprises an electromagnetic starter, and the electromagnetic starter is electrically connected with the oil pump.

[0018] In one of the embodiments, the insulation oil anti-oxidation filtering device further comprises a transportation mechanism, the transportation mechanism comprises a mounting plate, a push-pull handle and a roller, the push-pull handle is connected to one side of the mounting plate, the roller is rotatably installed on the bottom surface of the mounting plate, and the oil inlet mechanism, the oil outlet mechanism, the oil pump and the filtering mechanism are all installed on the mounting plate.

[0019] The application also provides an insulation oil anti-oxidation filtering method, which is suitable for the insulation oil anti-oxidation filtering device in the above embodiments, and comprises the following steps.

[0020] The natural ester insulation oil is filtered by using the insulation oil anti-oxidation filtering device.

[0021] After the filtering is completed, the gas outlet of the gas cylinder is connected to the gas inlet valve.

[0022] The gas inlet valve and the oil inlet valve are opened, the inert gas is introduced into the oil inlet pipe, the air in the oil inlet pipe is discharged, and then the oil inlet valve is closed.

[0023] Opening the oil outlet valve, inert gas is introduced into the oil outlet pipeline, and the air in the oil inlet pipeline is discharged, and then the oil outlet valve is closed;

[0024] The air inlet valve is closed.

[0025] The above-mentioned insulation oil anti-oxidation filtering device and method, respectively, connect the first oil outlet of the oil inlet pipeline and the second oil inlet of the oil outlet pipeline with the oil pump, the first oil inlet of the oil inlet pipeline is used for inputting the natural ester insulation oil to be filtered, the opening or closing of the first oil inlet can be controlled through the oil inlet valve, then under the driving of the oil pump, the natural ester insulation oil to be filtered is filtered through the filtering mechanism, the opening or closing of the second oil outlet can be controlled through the oil outlet valve, then the filtered natural ester insulation oil is output from the second oil outlet, thereby completing the filtering of the natural ester insulation oil. In this embodiment, the insulation oil anti-oxidation filtering device which has completed the filtering is connected with the gas storage bottle through the air inlet valve, the inert gas in the gas storage bottle is input into the oil inlet pipeline and the oil outlet pipeline, then the oil inlet valve, the oil outlet valve and the air inlet valve are closed after all the air in the insulation oil anti-oxidation filtering device is discharged, the inert gas is sealed in the insulation oil anti-oxidation filtering device, oxidation of the residual natural ester insulation oil and air is avoided, pollution of the natural ester insulation oil to be filtered next time is avoided, safety problem caused by the polluted natural ester insulation oil is avoided, and the advantages of preventing pollution and oxidation and good safety are achieved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The principle diagram of the insulation oil anti-oxidation filtering device described in the embodiments of the present application.

[0027] Figure 2 The front view structural schematic diagram of the insulation oil anti-oxidation filtering device described in the embodiments of the present application.

[0028] Figure 3 The side view structural schematic diagram of the insulation oil anti-oxidation filtering device described in the embodiments of the present application.

[0029] Figure 4 The top view structural schematic diagram of the insulation oil anti-oxidation filtering device described in the embodiments of the present application.

[0030] REFERENCE NUMERALS:

[0031] 100, oil inlet mechanism; 110, oil inlet pipeline; 110A, first oil inlet; 110B, first oil outlet; 120, oil inlet valve;

[0032] 200, oil outlet mechanism; 210, oil outlet pipeline; 210A, second oil inlet; 210B, second oil outlet; 220, oil outlet valve; 230, sampling valve;

[0033] 310, oil pump; 320, electromagnetic starter;

[0034] 400, filtering mechanism; 410, first filter; 420, second filter; 430, pressure switch; 440, pressure gauge; 450, exhaust valve;

[0035] 500, anti-oxidation mechanism; 510, gas cylinder; 520, gas inlet valve; 530, safety valve; 540, high-pressure gas pipe;

[0036] 600, transportation mechanism; 610, mounting plate; 620, push-pull handrail; 630, roller. DETAILED DESCRIPTION

[0037] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways beyond the specific embodiments described and it is therefore contemplated to cover all such modifications as fall within the scope of the application. It is to be understood that the application is not limited in its application to the details set forth in the description below.

[0038] In the description of the present application, it should be understood that, if these terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like appear, these terms indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0039] In addition, if these terms "first", "second" appear, these terms are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features referred to. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, if the term "a plurality of" appears, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise specifically limited.

[0040] In the present application, unless specifically defined otherwise and limited, if there are terms such as "mount", "connect", "connect", "fix" and the like, these terms should be understood in a broad sense. For example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0041] In the present application, unless specifically defined otherwise and limited, if there are similar descriptions such as "first feature on" or "second feature" and the like, the meaning can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature "above", "above" and "above" of the second feature can be directly above or obliquely above the first feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "below" and "below" of the second feature can be directly below or obliquely below the first feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0042] It should be noted that if an element is referred to as "fixed to" or "provided to" another element, it can be directly on another element or there can be a middle element. If an element is considered to be "connected" to another element, it can be directly connected to another element or there can be a middle element. If present, the terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used in the present application are only for illustrative purposes and are not the only embodiment.

[0043] Referring to Figure 1 , a principle schematic diagram of an insulating oil oxidation prevention filtering device in an embodiment of the present application is shown, and the insulating oil oxidation prevention filtering device comprises an oil inlet mechanism 100, an oil outlet mechanism 200, an oil conveying pump 310, a filtering mechanism 400 and an oxidation prevention mechanism 500. The oil inlet mechanism 100 comprises an oil inlet pipeline 110 and an oil inlet valve 120. One end of the oil inlet pipeline 110 is provided with a first oil inlet port 110A, and the other end of the oil inlet pipeline 110 is provided with a first oil outlet port 110B. The oil inlet valve 120 is installed on the oil inlet pipeline 110. The first oil inlet port 110A is used for inputting natural ester insulating oil to be filtered.

[0044] The oil outlet mechanism 200 comprises an oil outlet pipeline 210 and an oil outlet valve 220. One end of the oil outlet pipeline 210 is provided with a second oil inlet port 210A, and the other end of the oil outlet pipeline 210 is provided with a second oil outlet port 210B. The oil outlet valve 220 is installed on the oil outlet pipeline 210. The second oil outlet port 210B is used for outputting filtered natural ester insulating oil.

[0045] The input end of the oil delivery pump 310 is connected to the first oil outlet 110B, and the output end of the oil delivery pump 310 is connected to the second oil inlet 210A. The oil delivery pump 310 is used to drive the natural ester insulating oil to flow in the oil inlet pipeline 110 and the oil outlet pipeline 210. The filtering mechanism 400 is installed on the oil inlet pipeline 110 and / or the oil outlet pipeline 210.

[0046] The anti-oxidation mechanism 500 includes a gas cylinder 510 and an air inlet valve 520. The air inlet valve 520 is connected to the oil inlet pipeline 110 and / or the oil outlet pipeline 210, and the gas outlet of the gas cylinder 510 is connected to the air inlet valve 520. The gas cylinder 510 is used to store inert gas.

[0047] In an exemplary embodiment, the inert gas stored in the gas cylinder 510 is nitrogen.

[0048] In an exemplary embodiment, the oil inlet valve 120 is installed on the oil inlet pipeline 110 near one end of the first oil inlet 110A, the oil outlet valve 220 is installed on the oil outlet pipeline 210 near one end of the second oil outlet 210B, and the gas outlet of the gas cylinder 510 is detachably connected to the air inlet valve 520.

[0049] The natural ester insulating oil oxidation filtering device described in the embodiments of the present application connects the first oil outlet 110B of the oil inlet pipeline 110 and the second oil inlet 210A of the oil outlet pipeline 210 to the oil delivery pump 310, respectively. The first oil inlet 110A of the oil inlet pipeline 110 is used to input the natural ester insulating oil to be filtered. The oil inlet valve 120 can control the opening or closing of the first oil inlet 110A. Then, under the driving of the oil delivery pump 310, the natural ester insulating oil to be filtered is filtered through the filtering mechanism 400. The second oil outlet is controlled to be opened or closed through the oil outlet valve 220. Then, the filtered natural ester insulating oil is output from the second oil outlet 210B, thereby completing the filtration of the natural ester insulating oil.

[0050] The natural ester insulating oil oxidation filtering device described in the embodiments of the present application can connect the completed insulating oil anti-oxidation filtering device to the gas cylinder 510 through the air inlet valve 520, so that the inert gas in the gas cylinder 510 is input to the oil inlet pipeline 110 and the oil outlet pipeline 210. Then, all the air in the insulating oil anti-oxidation filtering device is discharged, and the oil inlet valve 120, the oil outlet valve 220 and the air inlet valve 520 are closed, so that the inert gas is sealed in the insulating oil anti-oxidation filtering device. This avoids the oxidation of the residual natural ester insulating oil and air, and the pollution of the natural ester insulating oil to be filtered next time, thereby avoiding the safety problem caused by the polluted natural ester insulating oil. The natural ester insulating oil oxidation filtering device has the advantages of preventing pollution and oxidation and good safety.

[0051] In some embodiments, as Figure 1As shown, the anti-oxidation mechanism 500 further comprises a safety valve 530 installed at the gas outlet of the gas cylinder 510. By setting the safety valve 530 at the gas outlet of the gas cylinder 510, when the pressure in the gas cylinder 510 abnormally rises due to various reasons and reaches the set pressure value of the safety valve 530, the safety valve 530 can be automatically opened to release the excess gas, thereby avoiding the rupture or even explosion of the gas cylinder 510 due to the pressure exceeding the bearing limit, preventing the gas cylinder 510 and other components of the insulating oil anti-oxidation filtering device from being damaged, and having the advantage of high safety.

[0052] In an optional embodiment, as shown in Figure 1 As shown, the anti-oxidation mechanism 500 further comprises a high-pressure gas pipe 540, one end of which is connected to the gas outlet of the gas cylinder 510, and the other end of which is connected to the gas inlet valve 520. The gas cylinder 510 is connected to the gas inlet valve 520 through the high-pressure gas pipe 540, which can withstand a higher gas pressure, ensuring that the inert gas in the gas cylinder 510 is delivered to the oil inlet pipe 110 and the oil outlet pipe 210 at a stable pressure and flow rate, thereby forming a stable inert gas protection for the residual natural ester insulating oil and effectively isolating the natural ester insulating oil from oxygen. Moreover, by using the high-pressure gas pipe 540, the gas cylinder 510 can be arranged at a proper position away from the gas inlet valve 520, making it more convenient for the operator to operate the gas inlet valve 520 and accurately control the inert gas filling amount and filling time, thereby better meeting the anti-oxidation operation requirements under different working conditions.

[0053] In combination with Figures 2 to 4 As shown, the structure schematic diagram of the insulating oil anti-oxidation filtering device in an embodiment of the present application is shown, and in an optional embodiment, the filtering mechanism 400 comprises a first filter 410 and a second filter 420. The first filter 410 is installed at the oil inlet pipe 110 and is arranged between the oil inlet valve 120 and the first oil outlet 110B of the oil inlet pipe 110. The second filter 420 is installed at the oil outlet pipe 210 and is arranged between the second oil inlet 210A and the oil outlet valve 220 of the oil outlet pipe 210.

[0054] In an exemplary embodiment, the first filter 410 is a coarse filter for coarsely filtering the natural ester insulating oil. The second filter 420 is a fine filter for finely filtering the natural ester insulating oil.

[0055] The embodiment sets the first filter 410 and the second filter 420 to respectively perform preliminary coarse filtration and re-filtration on the natural ester insulating oil. The preliminary coarse filtration of the first filter 410 can effectively intercept the relatively large impurities in the natural ester insulating oil, such as metal debris, sand, fibers, etc., so that the impurity content of the natural ester insulating oil entering the second filter 420 is reduced, the plugging frequency of the second filter 420 is reduced, the natural ester insulating oil can flow through the first filter 410 and the second filter 420 in a smoother state, the entire filtering mechanism 400 maintains a better flow rate and flow, which helps to improve the processing efficiency and prolong the service life of the second filter 420, and reduces the filter core replacement cost and equipment maintenance workload.

[0056] In an optional embodiment, as shown in Figure 1 and Figure 2 The filtering mechanism 400 further includes a pressure switch 430 and a pressure gauge 440, both of which are installed on the oil outlet pipeline 210, and both of which are arranged between the second oil inlet 210A and the second filter 420 of the oil outlet pipeline 210.

[0057] In the embodiment, as the filtering operation continues, the second filter 420 will intercept more and more impurities, thereby increasing the pressure difference on both sides of the second filter 420. The pressure gauge 440 can directly display the pressure condition of the oil outlet pipeline 210 between the second oil inlet 210A and the second filter 420, so that the operator can judge the degree of filter core plugging according to the pressure value change. When the pressure rises to the set value of the pressure switch 430, the pressure switch 430 will send an electrical signal alarm to prompt the worker to replace or clean the filter core of the second filter 420 in time, so as to prevent the filter core from being seriously blocked to affect the oil filtering efficiency and quality, which has the advantages of convenient use and high safety.

[0058] Further, when filling the inert gas in the oil inlet pipeline 110 and the oil outlet pipeline 210, the pressure gauge 440 can be used to detect the gas pressure in the insulating oil oxidation prevention filtering device, so that the inert gas in the insulating oil oxidation prevention filtering device maintains a real-time constant pressure of 0.02Mpa, which has the advantage of convenient use.

[0059] In an optional embodiment, as shown in Figure 1 and Figure 2 The oil outlet mechanism 200 further includes a sampling valve 230, which is installed on the oil outlet pipeline 210 and arranged between the second filter 420 and the oil outlet valve 220 of the oil outlet pipeline 210.

[0060] The natural ester insulating oil treated by the second filter 420 in this embodiment has reached a high degree of purity. The oil sample collected through the sampling valve 230 can truly reflect the final filtering effect of the insulating oil anti-oxidation filtering device and the actual quality condition of the natural ester insulating oil, so as to provide representative and effective samples for detecting various performance indexes of the natural ester insulating oil, such as breakdown voltage, volume resistivity and micro water content, and facilitate the staff to accurately judge whether the oil filtering operation reaches the expected standard. Moreover, during the oil filtering process of the filtering mechanism 400, the staff can periodically take samples through the sampling valve 230 for analysis, so as to understand the dynamic change of the quality of the natural ester insulating oil and judge the running stability of the filtering mechanism 400 and the actual working efficiency of the filter element.

[0061] In one exemplary embodiment, if the impurity content of the natural ester insulating oil sample is found to continuously increase through multiple sampling detections, it may mean that the filter element of the second filter 420 is close to saturation or there is an abnormality such as leakage, so that corresponding adjustment and maintenance can be timely performed.

[0062] In one optional embodiment, as shown in Figure 1 , the filtering mechanism 400 further includes an exhaust valve 450, and the second filter 420 is provided with an exhaust port, and the exhaust valve 450 is installed at the exhaust port.

[0063] In this embodiment, the exhaust valve 450 is arranged on the second filter 420, which is used to timely exhaust the air involved or formed in the filtering process of the natural ester insulating oil, so as to avoid the formation of air resistance in the natural ester insulating oil and ensure the smooth flow of the oil in the filter, so that the filtering operation of the filtering mechanism 400 can be efficiently performed. The exhaust valve 450 can also maintain the pressure of the insulating oil anti-oxidation filtering device in a normal and reasonable range, so as to ensure the safe and stable operation of the system.

[0064] In one optional embodiment, as shown in Figure 2 and Figure 4 , the insulating oil anti-oxidation filtering device further includes an electromagnetic starter 320, and the electromagnetic starter 320 is electrically connected with the oil pump 310.

[0065] The electromagnetic starter 320 in this embodiment controls the contactor to be attracted or disconnected through the on-off control of the electromagnetic coil, so as to realize the starting or stopping operation of the oil pump 310. The electromagnetic starter 320 further includes a thermal relay and other protection elements. When the current of the oil pump 310 exceeds the rated value due to excessive load, the thermal relay will trigger power-off to cut off the power supply of the oil pump 310, so as to avoid the burning of the oil pump 310 due to overheating and ensure the safe and stable operation of the equipment.

[0066] In one optional embodiment, as shown in Figures 2 to 4As shown, the insulating oil anti-oxidation filtering device further comprises a conveying mechanism 600, which comprises a mounting plate 610, a push-pull handrail 620 connected to one side of the mounting plate 610, and a plurality of rollers 630 rotatably mounted to the bottom surface of the mounting plate 610. The oil inlet mechanism 100, the oil outlet mechanism 200, the oil conveying pump 310, and the filtering mechanism 400 are all mounted to the mounting plate 610.

[0067] The embodiment installs the insulating oil anti-oxidation filtering device on the conveying mechanism 600, which facilitates the movement of the insulating oil anti-oxidation filtering device through the push-pull handrail 620 and the rollers 630, and has the advantage of convenient use.

[0068] On the other hand, the application also provides an insulating oil anti-oxidation filtering method, which is applicable to the insulating oil anti-oxidation filtering device of any one of the above embodiments and comprises the following steps:

[0069] Step S100: filtering the natural ester insulating oil by using the insulating oil anti-oxidation filtering device;

[0070] Step S200: after the filtering is completed, connecting the gas outlet of the gas cylinder 510 to the air inlet valve 520;

[0071] Step S300: opening the air inlet valve 520 and the oil inlet valve 120, allowing the inert gas to enter the oil inlet pipeline 110, and closing the oil inlet valve 120 after the air in the oil inlet pipeline 110 is discharged;

[0072] Step S400: opening the oil outlet valve 220, allowing the inert gas to enter the oil outlet pipeline 210, and closing the oil outlet valve 220 after the air in the oil inlet pipeline 110 is discharged;

[0073] Step S500: closing the air inlet valve 520.

[0074] The natural ester insulating oil oxidation filtering method of the embodiment of the application connects the insulating oil anti-oxidation filtering device after the filtering is completed to the gas cylinder 510 through the air inlet valve 520, allows the inert gas in the gas cylinder 510 to enter the oil inlet pipeline 110 and the oil outlet pipeline 210, then closes the oil inlet valve 120, the oil outlet valve 220, and the air inlet valve 520 after all the air in the insulating oil anti-oxidation filtering device is discharged, and allows the inert gas to be sealed in the insulating oil anti-oxidation filtering device, thereby avoiding the oxidation of the residual natural ester insulating oil and air, preventing the pollution of the natural ester insulating oil, avoiding the safety problem caused by the polluted natural ester insulating oil, and having the advantages of preventing pollution and oxidation and good safety.

[0075] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.

[0076] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.

Claims

1. An insulating oil oxidation-preventing filter device characterized by comprising: The device comprises: an oil inlet mechanism (100) comprising an oil inlet pipe (110) and an oil inlet valve (120), one end of the oil inlet pipe (110) being provided with a first oil inlet port (110A), the other end of the oil inlet pipe (110) being provided with a first oil outlet port (110B), the oil inlet valve (120) being installed on the oil inlet pipe (110); an oil outlet mechanism (200) comprising an oil outlet pipe (210) and an oil outlet valve (220), one end of the oil outlet pipe (210) being provided with a second oil inlet port (210A), the other end of the oil outlet pipe (210) being provided with a second oil outlet port (210B), the oil outlet valve (220) being installed on the oil outlet pipe (210); an oil pump (310), the input end of the oil pump (310) being connected to the first oil outlet port (110B), the output end of the oil pump (310) being connected to the second oil inlet port (210A); a filtering mechanism (400), the filtering mechanism (400) being installed on the oil inlet pipe (110) and / or the oil outlet pipe (210); an anti-oxidation mechanism (500), the anti-oxidation mechanism (500) comprising a gas storage cylinder (510) and a gas inlet valve (520), the gas inlet valve (520) being connected to the oil inlet pipe (110) and / or the oil outlet pipe (210), the gas outlet port of the gas storage cylinder (510) being connected to the gas inlet valve (520), the gas storage cylinder (510) being used for storing inert gas.

2. The device according to claim 1, wherein: the anti-oxidation mechanism (500) further comprises a safety valve (530), the safety valve (530) being installed on the gas outlet port of the gas storage cylinder (510).

3. The device according to claim 1, wherein: the anti-oxidation mechanism (500) further comprises a high-pressure gas pipe (540), one end of the high-pressure gas pipe (540) being connected to the gas outlet port of the gas storage cylinder (510), the other end of the high-pressure gas pipe (540) being connected to the gas inlet valve (520).

4. The device according to claim 1, wherein: the filtering mechanism (400) comprises a first filter (410) and a second filter (420), the first filter (410) being installed on the oil inlet pipe (110), and the first filter (410) being arranged on the oil inlet pipe (110) between the oil inlet valve (120) and the first oil outlet port (110B), the second filter (420) being installed on the oil outlet pipe (210), and the second filter (420) being arranged on the oil outlet pipe (210) between the second oil inlet port (210A) and the oil outlet valve (220).

5. The device according to claim 4, wherein: The filtering mechanism (400) further comprises a pressure switch (430) and a pressure gauge (440), both of which are installed on the oil outlet pipeline (210) and arranged between the second oil inlet (210A) and the second filter (420).

6. The insulating oil anti-oxidation filtering device according to claim 4, characterized in that: The oil outlet mechanism (200) further comprises a sampling valve (230), which is installed on the oil outlet pipeline (210) and arranged between the second filter (420) and the oil outlet valve (220).

7. The insulating oil anti-oxidation filtering device according to claim 4, characterized in that: The filtering mechanism (400) further comprises an exhaust valve (450), and the second filter (420) is provided with an exhaust port, and the exhaust valve (450) is installed on the exhaust port.

8. The insulating oil anti-oxidation filtering device according to claim 1, characterized in that: The insulating oil anti-oxidation filtering device further comprises an electromagnetic starter (320), which is electrically connected with the oil pump (310).

9. The insulating oil anti-oxidation filtering device according to claim 1, characterized in that: The insulating oil anti-oxidation filtering device further comprises a transportation mechanism (600), which comprises a mounting plate (610), a push-pull handle (620) and a plurality of rollers (630), the push-pull handle (620) is connected to one side of the mounting plate (610), the rollers (630) are rotatably installed on the bottom surface of the mounting plate (610), and the oil inlet mechanism (100), the oil outlet mechanism (200), the oil pump (310) and the filtering mechanism (400) are all installed on the mounting plate (610).

10. An insulating oil oxidation prevention filtering method suitable for the insulating oil oxidation prevention filtering device according to any one of claims 1 to 9, characterized by, The method comprises the following steps: The natural ester insulating oil is filtered by using the insulating oil anti-oxidation filtering device; After the filtering is completed, the gas outlet of the gas storage bottle (510) is connected with the air inlet valve (520); The air inlet valve (520) and the oil inlet valve (120) are opened, the inert gas is introduced into the oil inlet pipeline (110), the air in the oil inlet pipeline (110) is discharged, and then the oil inlet valve (120) is closed; The oil outlet valve (220) is opened, the inert gas is introduced into the oil outlet pipeline (210), the air in the oil inlet pipeline (110) is discharged, and then the oil outlet valve (220) is closed; The air inlet valve (520) is closed.

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