Integrated transformer oil purification and recovery system and recovery method thereof

Abstract

The invention relates to the technical field of transformer oil purification, and particularly discloses an integrated transformer oil purification and recovery system and a recovery method thereof.The integrated transformer oil purification and recovery system is characterized in that a stirring impeller assembly is arranged in an oil cylinder containing cavity, and the stirring impeller assembly is configured to do up-down reciprocating motion along the central axis while rotating along the central axis of an oil cylinder; the bottom of the vacuum tank and the top of the oil cylinder are communicated with the containing cavity, the input end of the three-way valve is communicated with the top of the vacuum tank, the three-way valve is provided with a first output end and a second output end which are communicated with the input end, the input end of the vacuum valve is communicated with the first output end, and the output end of the vacuum valve is communicated with the vacuum pump. The input end and the output end of the circulating pump are respectively communicated with the containing cavity at intervals, the device is smaller in size, and the contact area between a liquid phase and a gas phase can be increased when an oil sample is in a vacuum state and flows, so that the purification efficiency of the oil sample is improved, and meanwhile, the oil quality purification requirements in different scenes can be met.

Description

Technical Field

[0001] This application relates to the technical field of transformer oil purification, and particularly to an integrated transformer oil purification and recovery system and its recovery method. Background Art

[0002] Transformer oil plays key roles such as insulation, heat dissipation, and arc extinction in the power system. The quality of the oil directly affects the safe and stable operation of the transformer. However, during long-term operation, transformer oil gradually deteriorates due to reasons such as moisture absorption, oxidation, and impurity mixing, resulting in problems such as decreased insulation performance and equipment overheating, and may even cause failures. Therefore, purifying transformer oil is an important measure to ensure the safe operation of the power grid.

[0003] In related technologies, common transformer oil purification technologies include two methods: offline oil filtration and online oil filtration. Offline oil filtration requires power outage of the transformer, with long processing time, low efficiency, and a cumbersome and complex process. Although online oil filtration can be carried out while the transformer is running, existing online oil filtration devices are not only large in volume and complex to install, but also have poor adaptability to special environments such as high altitude and low temperature, and it is difficult to meet the oil quality purification requirements in different scenarios. Summary of the Invention

[0004] This application aims to solve the problems in the prior art that existing online oil filtration devices are not only large in volume and complex to install, but also have poor adaptability to special environments such as high altitude and low temperature, and it is difficult to meet the oil quality purification requirements in different scenarios, and proposes an integrated transformer oil purification and recovery system and its recovery method.

[0005] In a first aspect, an embodiment of this application provides an integrated transformer oil purification and recovery system, including: An oil cylinder having a cavity for receiving an oil sample disposed along the axis. A stirring impeller assembly is arranged in the cavity. The stirring impeller assembly is configured to rotate around the central axis of the oil cylinder and reciprocate up and down along the central axis while the cavity is in a vacuum state and the oil sample in the cavity is flowing, so as to increase the contact area between the oil sample and gas in the cavity; A vacuum tank, the bottom of which is connected to the top of the oil cylinder through a pipeline; A three-way valve, the input end of which is communicated with the top of the vacuum tank through a pipeline. The three-way valve has a first output end and a second output end communicated with the input end; A vacuum valve and a vacuum pump, the input end of the vacuum valve is communicated with the first output end, and the output end of the vacuum valve is communicated with the vacuum pump; An air release valve, the input end of which is communicated with the second output end; A circulation pump, the input end and the output end of which are respectively communicated with the cavity at intervals.

[0006] In some possible embodiments, the oil cylinder has a first surface disposed at the bottom end of the cavity and a second surface at the top end. The first surface is provided with a first connection port communicating with one end of the circulation pump, and the second surface is provided with a second connection port communicating with the bottom of the vacuum tank and a third connection port communicating with the other end of the circulation pump.

[0007] In some possible embodiments, the oil cylinder includes: A stirring motor disposed on the second surface, and the output end of the stirring motor extends into the cavity A stirring impeller assembly disposed in the cavity and having one end drivingly connected to the output end of the stirring motor; A lifting motor disposed on the first surface, and the output end of the lifting motor extends into the cavity and is drivingly connected to the other end of the stirring impeller assembly.

[0008] In some possible embodiments, the stirring motor, the stirring impeller assembly, and the lifting motor are disposed along the central axis of the oil cylinder. Among them, the stirring motor is configured to drive the stirring impeller assembly to rotate about the central axis of the oil cylinder, and the lifting motor is configured to drive the stirring impeller assembly to reciprocate along the central axis of the oil cylinder.

[0009] In some possible embodiments, the stirring impeller assembly includes an arc-shaped blade portion. One end of the arc-shaped blade portion is coaxially provided with a first connecting shaft. One end of the output shaft of the stirring impeller assembly is provided with a limiting sleeve, and a part of the first connecting shaft extends into the limiting sleeve.

[0010] In some possible embodiments, a first limiting protrusion is disposed on the surface of the first connecting shaft along the axis, and a sliding groove cooperating with the first limiting protrusion is disposed on the inner wall of the limiting sleeve. The first connecting shaft is configured to be selectively slidable along the axial direction of the limiting sleeve.

[0011] In some possible embodiments, the other end of the arc-shaped blade portion is coaxially provided with a second connecting shaft. One end of the second connecting shaft is rotatably connected to a transmission rod, and one end of the transmission rod extends to be drivingly connected to the output shaft of the lifting motor.

[0012] In some possible embodiments, one end of the transmission rod is provided with a receiving portion rotatably connected to one end of the second connecting shaft, and the other end is provided with a threaded section drivingly connected to the output shaft of the lifting motor.

[0013] In some possible embodiments, a liquid level switch and a pressure sensor are disposed at intervals on the vacuum tank.

[0014] In a second aspect, an embodiment of the present application further provides an integrated transformer oil purification and recovery method, which is applied to the system described in any one of the above embodiments. The method includes: Step S10: Inject the oil sample to be purified into the oil cylinder through the oil inlet. Step S20: When the preset amount of the oil sample is injected, close the vent valve, open the vacuum valve, and start the vacuum pump to evacuate the vacuum tank to a vacuum. When the reading of the pressure sensor reaches the set vacuum value, control the vacuum pump to stop working. The range of the set vacuum value is 0 to 4 kPa. Step S30: Turn on the circulation pump to make the oil sample to be purified flow back and forth between the oil cylinder and the circulation pump. Step S40: When the cavity is in a vacuum state and the oil sample in the cavity is flowing, start the driving motor and the stirring motor to drive the stirring impeller assembly to rotate and move up and down reciprocally in the oil cylinder to stir the oil sample to be purified. Step S50: When there is no dissolved gas escaping from the oil sample to be purified or the oil sample enters the vacuum tank through the pipeline under negative pressure and triggers the level switch, turn off the vacuum pump, the circulation pump, the stirring motor, and the driving motor to complete the purification and recovery of the oil sample.

[0015] Compared with the prior art, the technical solution provided by the embodiment of the present application has at least the following beneficial effects: 1) The integrated transformer oil purification and recovery system of the present application can be integrated in a box. Compared with the existing large offline oil filter or online oil filtering device, it is not only smaller in volume but also more convenient to use. When in use, the transformer oil can be directly connected to the system body to carry out continuous oil quality purification work, or the transformer oil can be taken out from the transformer first, and then injected into the transformer body after the oil quality is purified. Further, through the setting of the oil cylinder, innovatively, the vacuum tank, the vacuum valve, the vacuum pump, and the vent valve are connected through a pipeline and a three-way valve at the top of the oil sample cavity of the oil cylinder. When evacuating the oil cylinder, it can prevent the oil sample from entering the vacuum tank, and at the same time, the gas path is simpler. And through the stirring impeller assembly arranged in the oil cylinder, when the oil sample in the oil cylinder is in a vacuum state and flowing, the contact area between the oil sample in the cavity and the dissolved gas can be increased, so that it can be fully removed under the vacuum state.

[0016] 2) Through the settings of the stirring motor, the stirring impeller assembly, and the lifting motor, a limiting sleeve and a first connecting shaft are provided at the connection between the stirring motor and the stirring impeller assembly. The first connecting shaft and the limiting sleeve are not restricted in the axial degree of freedom, but are restricted in the circumferential degree of freedom. Thus, while the stirring impeller assembly is lifting and lowering, it can also achieve self-rotation. A transmission rod and a second connecting shaft are provided at the connection between the stirring motor and the stirring impeller assembly. The second connecting shaft and one end of the transmission rod are restricted in the axial degree of freedom and not restricted in the circumferential degree of freedom. Thus, while the stirring impeller assembly is rotating, it can also achieve lifting and lowering. In this way, during the process of oil sampling in the stirring cavity, the contact area between the oil sample in the cavity and the dissolved gas is further increased, so as to be fully removed under a vacuum state.

[0017] Additional aspects and advantages of the present application will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present application. Brief Description of the Drawings

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0019] Figure 1 is a schematic structural diagram of the corresponding box body of the integrated transformer oil purification and recovery system shown according to an embodiment of the present application; Figure 2 is a schematic structural diagram of the integrated transformer oil purification and recovery system shown according to an embodiment of the present application; Figure 3 is a schematic structural diagram of the oil cylinder shown according to an embodiment of the present application; Figure 4 is a schematic structural diagram of the oil cylinder shown according to an embodiment of the present application; Figure 5 is a schematic structural diagram of the internal components of the oil cylinder shown according to an embodiment of the present application; Figure 6 is a top view of the lifting screw rod assembly projected along the axial direction shown according to an embodiment of the present application; Figure 7 is a schematic structural diagram of the vacuum tank shown according to an embodiment of the present application; Figure 8 is a flowchart of the integrated transformer oil purification and recovery method shown according to an embodiment of the present application.

[0020] Reference Numerals: 10, box body; 11, control module; 12, oil inlet end; 13, oil outlet end; 100. Oil cylinder; 110. First surface; 111. Oil return port; 112. First connection port; 120. Second surface; 121. Oil inlet; 122. Second connection port; 123. Third connection port; 130. Stirring motor; 131. Limit sleeve; 1311. Chute; 140. Stirring impeller assembly; 141. Arc blade part; 142. First connecting shaft; 1421. First limit projection; 143. Second connecting shaft; 1431. Flap; 1432. Pin; 144. Bearing; 1441. Second limit projection; 145. Gasket; 146. Transmission rod; 1461. Accommodating part; 14611. Limit groove; 1462. Threaded section; 150. Lifting motor; 200. Vacuum tank; 210. Liquid level switch; 220. Pressure sensor; 300. Three-way valve; 310. First output end; 320. Second output end; 400. Vacuum valve; 500. Vacuum pump; 600. Vent valve; 700. Circulation pump. Detailed implementation manners

[0021] The embodiments of the present application will be described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0022] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the description of this application in this specification are only for the purpose of describing specific implementation manners and are not intended to limit this application. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0024] Please refer to Figure 1 , Figure 1The structural schematic diagram of the box corresponding to the integrated transformer oil purification and recovery system of this embodiment is shown. It should be noted that the integrated transformer oil purification and recovery system provided in this embodiment can be enclosed in a box 10. There are no requirements for the structure of the box 10 and the detailed layout of the integrated transformer oil purification and recovery system in the box 10. In a realizable manner, the box 10 can be in the shape of a rectangular body. Two oil inlets 12 and an oil outlet 13 for connecting transformer oil can be reserved on the surface of the box 10. There are no requirements for the position settings of the oil inlets 12 and the oil outlet 13. The oil inlets 12 and the oil outlet 13 are connected to the devices of the integrated transformer oil purification and recovery system through oil pipes.

[0025] Optionally, a plurality of universal wheels can be arranged on the bottom surface of the box 10, and a handle can be arranged on the surface of the box 10. In this way, it is convenient to transfer the box 10. The integrated transformer oil purification and recovery system of this embodiment is encapsulated in the box 10. Compared with the existing large offline oil filter or online oil filtering device, it not only has a smaller volume but also is more convenient to use. When in use, the transformer oil can be directly connected to the system body to carry out continuous oil quality purification work, or the transformer oil can be taken out from the transformer first, and then injected into the transformer body after the oil quality is purified.

[0026] Please refer to Figure 2 , for the integrated transformer oil purification and recovery system, it can include an oil cylinder 100, a vacuum tank 200, a three-way valve 300, a vacuum valve 400, a vacuum pump 500, a vent valve 600 and a circulation pump 700. The oil cylinder 100 is provided with pipelines communicating the oil inlets 12 and the oil outlet 13 to introduce the external transformer oil sample into the system for purification and discharge the purified oil sample. The bottom input end of the vacuum tank 200 is communicated with the cavity at the top of the oil cylinder 100 through a pipeline. The selection of the pipeline can be adaptively selected according to the requirements in the industry. The input end of the three-way valve 300 is communicated with the top output end of the vacuum tank 200. The three-way valve 300 has a first output end 310 and a second output end 320 communicating with the input end. The vacuum valve 400 and the vacuum pump 500, the input end of the vacuum valve 400 is communicated with the first output end 310, and the output end is communicated with the vacuum pump 500; the input end of the vent valve 600 is communicated with the second output end 320, and the input end and the output end of the circulation pump 700 are respectively and spacedly communicated with the cavity.

[0027] Optionally, the description of the input and output ends mentioned above is only for the convenience of distinction and does not impose any limitation on the devices in the system. Taking the vacuum tank 200 as an example, when vacuuming, the gas flows from bottom to top, then it can be considered that the bottom of the vacuum tank 200 is the input end, and the top of the vacuum tank 200 is the output end. When the vent valve 600 is working, the gas flows from top to bottom, then it can be considered that the top of the vacuum tank 200 is the input end, and the bottom of the vacuum tank 200 is the output end. Therefore, the description of the input and output ends does not impose any limitation on the devices in the system.

[0028] Optionally, the vacuum tank 200, the three-way valve 300, the vacuum valve 400, the vacuum pump 500, the vent valve 600 and the circulation pump 700 can be obtained from the prior art, and the specific specifications, dimensions and working principles are not described here.

[0029] It should be noted that during the vacuuming process using the vacuum valve 400 and the vacuum pump 500 , the vacuuming range can be set to 0 to 4 kPa. Under the pressure within this range, the oil sample will not be sucked into the vacuum tank 200 due to gravity.

[0030] See also Figure 3 and Figure 4 , the oil cylinder 100 has a cavity arranged along the axial direction, and a stirring impeller assembly 140 is arranged in the cavity. The stirring impeller assembly 140 is configured to rotate along the central axis of the oil cylinder 100 and reciprocate up and down along the central axis when the cavity is in a vacuum state and the oil sample flows in the cavity, so as to increase the contact area between the oil sample and the gas in the cavity; In some embodiments, the oil cylinder 100 is shaped like a cylinder, and a cavity is arranged in the cylinder along the central axis direction. The oil cylinder 100 has a first surface 110 arranged at the bottom end of the cavity and a second surface 120 arranged at the top end. The first surface 110 is provided with a first connecting port 112 connected to one end of the circulating pump 700, and the second surface 120 is provided with a second connecting port 122 connected to the bottom of the vacuum tank 200, and a third connecting port 123 connected to the other end of the circulating pump.

[0031] In some embodiments, the oil cylinder 100 includes a stirring motor 130 and a lifting motor 150. The stirring motor 130 is arranged on the second surface 120, and the output end of the stirring motor 130 extends into the cavity. The stirring impeller assembly 140 is arranged in the cavity, and one end is transmission-connected to the output end of the stirring motor 130; the lifting motor 150 is arranged on the first surface 110, and the output end of the lifting motor 150 extends into the cavity and is transmission-connected to the other end of the stirring impeller assembly 140.

[0032] It should be understood that the stirring motor 130, the stirring impeller assembly 140, and the lifting motor 150 are arranged along the central axis of the oil cylinder 100. Among them, the stirring motor 130 is configured to drive the stirring impeller assembly 140 to rotate around its own axis along the central axis of the oil cylinder 100, and the lifting motor 150 is configured to drive the stirring impeller assembly 140 to reciprocate along the central axis of the oil cylinder 100. The output shafts of the stirring motor 130 and the lifting motor 150 extend to the connection in the cavity and need to be sealed. The specific sealing method can refer to the prior art, such as adding sealing rings and other components.

[0033] It should also be noted that the stirring motor 130 and the lifting motor 150 can be obtained from the prior art, and the specific specifications and models are selected according to actual needs and are not limited here. For example, the amplitude of the stirring rotation can be: 180 ± 0.1 mm, and the rotation speed can be: 3000 revolutions per second.

[0034] Please refer to Figures 5 to 6 , the stirring impeller assembly 140 includes an arc-shaped blade portion 141. One end of the arc-shaped blade portion 141 is coaxially provided with a first connecting shaft 142. One end of the output shaft of the stirring impeller assembly 140 is provided with a limiting sleeve 131. A part of the first connecting shaft 142 extends into the limiting sleeve 131. The other end of the arc-shaped blade portion 141 is coaxially provided with a second connecting shaft 143. One end of the second connecting shaft 143 is rotatably connected to a transmission rod 146, and one end of the transmission rod 146 extends to be in transmission connection with the output shaft of the lifting motor 150.

[0035] In some embodiments, a first limiting protrusion 1421 is arranged on the surface of the first connecting shaft 142 along the axis, and a sliding groove 1311 that cooperates with the first limiting protrusion 1421 is arranged on the inner wall of the limiting sleeve 131. The first connecting shaft 142 is configured to be selectively slidable along the axial direction of the limiting sleeve 131.

[0036] It should be understood that the number of the first limiting protrusions 1421 is the same as that of the sliding grooves 1311. As shown in the figure, four first limiting protrusions 1421 can be arranged at intervals on the surface of the first connecting shaft 142. The first limiting protrusions 1421 are strip-shaped, and the sliding grooves 1311 are strip-shaped along the central axis direction of the limiting sleeve 131. The limiting sleeve 131 has a certain length to ensure that one end of the first connecting shaft 142 will not fall off the limiting sleeve 131 during the lifting process of the stirring impeller assembly 140.

[0037] In some embodiments, a retaining piece 1431 is provided at one end of the second connecting shaft 143 close to the arc-shaped blade portion 141, and a pin hole is provided on the side of the second connecting shaft 143 away from the arc-shaped blade portion 141. Among them, a bearing 144 and a gasket 145 are coaxially sleeved on the surface of the second connecting shaft 143 in sequence. One side surface of the bearing 144 abuts against the retaining piece 1431, and then through the cooperation of the pin 1432 and the pin hole, the bearing 144 and the gasket 145 are fixed on the surface of the second connecting shaft 143. In this way, the smooth rotation of the stirring impeller assembly 140 is ensured.

[0038] Optionally, a receiving portion 1461 rotatably connected to one end of the second connecting shaft 143 is provided at one end of the transmission rod 146, and a threaded section 1462 drivingly connected to the output shaft of the lifting motor 150 is provided at the other end. For the process of the lifting motor 150 driving the transmission rod 146 to lift, reference can be made to the prior art and will not be elaborated here. The receiving portion 1461 can be in the shape of a short cylinder, and a limiting groove 14611 can be provided on the inner cavity side wall of the opening at one end of the receiving portion 1461. A second limiting protrusion 1441 can be provided on the surface of the bearing 144. Through the setting of the limiting groove 14611 and the second limiting protrusion 1441, after the bearing 144 and the gasket 145 are installed in the receiving portion 1461 by an external force, an interference fit between the bearing 144 and the receiving portion 1461 is achieved. In this way, when the stirring impeller assembly 140 rotates, the lifting motor 150 can drive the stirring impeller assembly 140 to move up and down reciprocally.

[0039] Please refer to Figure 7 , the vacuum tank 200 is provided with a liquid level switch 210 and a pressure sensor 220 at intervals. The liquid level switch 210 and the pressure sensor 220 can be obtained from the prior art, and the specific model specifications can be selected according to actual needs. Their working principles will not be elaborated here. The setting of the liquid level switch 210 can be used to determine whether the purification is completed and to prevent the oil sample from entering the vacuum tank 200 after purification. The setting of the pressure sensor 220 can be used to detect the pressure inside the tank after vacuum pumping for judgment.

[0040] In the above embodiments, the integrated transformer oil purification and recovery system can be integrated in a box. Compared with the existing large-scale offline oil filter or online oil filtering device, it not only has a smaller volume but also is more convenient to use. When in use, the transformer oil can be directly connected to the system body to carry out continuous oil quality purification work, or the transformer oil can be taken out from the transformer first, and then injected into the transformer body after the oil quality is purified. Further, through the setting of the oil cylinder, innovatively, a vacuum tank 200, a vacuum valve 400, a vacuum pump 500, and a vent valve 600 are connected to the top of the oil sample cavity of the oil cylinder through a pipeline and a three-way valve. When evacuating the oil cylinder, the oil sample can be prevented from entering the vacuum tank 200, and at the same time, the gas circuit is simpler. And through the stirring impeller assembly 140 arranged in the oil cylinder, when the oil sample in the oil cylinder is in a vacuum state and flowing, the contact area between the oil sample in the cavity and the dissolved gas can be increased, so as to be fully removed under the vacuum state. Secondly, through the setting of the stirring motor 130, the stirring impeller assembly 140, and the lifting motor 150, a limit sleeve 131 and a first connecting shaft 142 are arranged at the connection between the stirring motor 130 and the stirring impeller assembly 140. The freedom degree of the first connecting shaft 142 and the limit sleeve 131 in the axial direction is not restricted, and the freedom degree in the circumferential direction is restricted. Thus, while the stirring impeller assembly 140 is lifting, it can also rotate self - sufficiently. A transmission rod 146 and a second connecting shaft 143 are arranged at the connection between the stirring motor 130 and the stirring impeller assembly 140. The freedom degree of the second connecting shaft 143 and one end of the transmission rod 146 in the axial direction is restricted, and the freedom degree in the circumferential direction is not restricted. Thus, while the stirring impeller assembly 140 is rotating self - sufficiently, it can also lift. In this way, during the process of stirring the oil sample in the stirring cavity, the contact area between the oil sample in the cavity and the dissolved gas is further increased, so as to be fully removed under the vacuum state.

[0041] Please refer to Figure 8 , this embodiment also provides an integrated transformer oil purification and recovery method, which is applied to the integrated transformer oil purification and recovery system described in any one of the above embodiments. The method includes: Step S10: Inject the oil sample to be purified into the oil cylinder 100 through the oil inlet; Step S20: When the preset amount of the oil sample is injected, close the vent valve 600, open the vacuum valve 400, start the vacuum pump 500 to evacuate the vacuum tank 200 to a vacuum state. When the reading of the pressure sensor 220 reaches the set vacuum value, control the vacuum pump 500 to stop working.

[0042] In some embodiments, the preset amount can be determined according to the volume of the cavity of the oil cylinder 100, specifically depending on actual requirements. The operations of the vent valve 600, the vacuum valve 400, and the vacuum pump 500 can be controlled by an electronic device. The set vacuum value range inside the tank is 0 to 4 kPa, that is, in an industrial vacuum environment. Among them, the working temperature of the pressure sensor is -40°C to 120°C, and the measurement range is 0 to 50 kPa, and it can output analog signals and digital signals. The liquid level switch 210 is located at the lower part of the vacuum tank and can control the working process of the device. When the liquid level reaches the liquid level switch 210, the working process automatically stops.

[0043] Step S30: Turn on the circulation pump 311 to make the oil sample to be purified flow reciprocally between the oil cylinder 307 and the circulation pump 311. Among them, the oil flow rate when the circulation pump 311 circulates is: 300 ml / second; Step S40: Under the condition that the cavity is in a vacuum state and the oil sample in the cavity is flowing, start the drive motor 308 and the stirring motor 305 to drive the stirring impeller assembly to rotate and move up and down reciprocally in the oil cylinder 100 to stir the oil sample to be purified; among them, the amplitude of the stirring machine can be: 180 ± 0.1 mm, and the rotation speed can be: 3000 revolutions per second.

[0044] Step S50: When there is no dissolved gas escaping from the oil sample to be purified or the oil sample enters the vacuum tank 200 through the pipeline under negative pressure conditions and triggers the liquid level switch 210, turn off the vacuum pump 500, the circulation pump 311, the stirring motor 305, and the drive motor 308 to complete the purification and recovery of the oil sample.

[0045] It should be noted that installing the above process steps to purify the oil sample of the integrated transformer oil purification and recovery integrated transformer oil purification and recovery system can effectively improve the purification degree. For the technical effects that can be achieved by the integrated transformer oil purification and recovery method of this embodiment, reference can be made to Figures 1 to 7 the description of the corresponding embodiment, which will not be elaborated here.

[0046] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0047] In the description of this specification, the description referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples", etc. means 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 this application. In this specification, the schematic expressions of the above terms do not necessarily refer to the same embodiment or example.

[0048] Obviously, the described embodiments are only a part of the embodiments of this application, rather than all embodiments. The mention of "embodiment" in this context means that the specific features, structures, or characteristics described in connection with the embodiment can be included in at least one embodiment of this application. The appearance of this phrase at various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. Those skilled in the art can explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts belong to the scope protected by this application.

[0049] Although the embodiments of this application have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and purposes of this application. The scope of this application is defined by the claims and their equivalents.

Claims

1. An integrated transformer oil purification and recovery system, characterized in that Comprising: An oil cylinder, the oil cylinder having a cavity for accommodating an oil sample arranged along the axial direction, a stirring impeller assembly is arranged in the cavity, and the stirring impeller assembly is configured to rotate around the central axis of the oil cylinder and reciprocate up and down along the central axis while the cavity is in a vacuum state and the oil sample in the cavity is flowing, so as to increase the contact area between the oil sample and gas in the cavity; A vacuum tank, the bottom of the vacuum tank is connected to the top of the oil cylinder through a pipeline; A three-way valve, the input end of the three-way valve is connected to the top of the vacuum tank through a pipeline, and the three-way valve has a first output end and a second output end communicated with the input end; A vacuum valve and a vacuum pump, the input end of the vacuum valve is communicated with the first output end, and the output end of the vacuum valve is communicated with the vacuum pump; A vent valve, the input end of the vent valve is communicated with the second output end; A circulation pump, the input end and the output end of the circulation pump are respectively communicated with the cavity at intervals.

2. The integrated transformer oil purification and recovery system according to claim 1, wherein The oil cylinder has a first surface arranged at the bottom end of the cavity and a second surface arranged at the top end, the first surface is provided with a first connection port communicated with one end of the circulation pump, and the second surface is provided with a second connection port communicated with the bottom of the vacuum tank and a third connection port communicated with the other end of the circulation pump.

3. The integrated transformer oil purification and recovery system according to claim 1, wherein The oil cylinder includes: A stirring motor, arranged on the second surface, and the output end of the stirring motor extends into the cavity; A stirring impeller assembly, the stirring impeller assembly is arranged in the cavity, and one end is in transmission connection with the output end of the stirring motor; A lifting motor, arranged on the first surface, and the output end of the lifting motor extends into the cavity and is in transmission connection with the other end of the stirring impeller assembly.

4. The integrated transformer oil purification and recovery system according to claim 3, characterized in that, The stirring motor, the stirring impeller assembly and the lifting motor are arranged along the central axis of the oil cylinder. Among them, the stirring motor is configured to drive the stirring impeller assembly to rotate around the central axis of the oil cylinder, and the lifting motor is configured to drive the stirring impeller assembly to reciprocate along the central axis of the oil cylinder.

5. An integrated transformer oil purification and recovery system according to claim 3 or 4, characterized in that, The stirring impeller assembly includes an arc-shaped blade part, one end of the arc-shaped blade part is provided with a first connecting shaft coaxially, a limiting sleeve is arranged at one end of the output shaft of the stirring impeller assembly, and a part of the first connecting shaft extends into the limiting sleeve.

6. The integrated transformer oil purification and recovery system according to claim 5, wherein A first limiting protrusion is arranged on the surface of the first connecting shaft along the axis, a sliding groove matched with the first limiting protrusion is arranged on the inner wall of the limiting sleeve, and the first connecting shaft is configured to be selectively slidable along the axial direction of the limiting sleeve.

7. The integrated transformer oil purification and recovery system according to claim 5, characterized in that, The other end of the arc-shaped blade part is provided with a second connecting shaft coaxially, one end of the second connecting shaft is rotatably connected with a transmission rod, and one end of the transmission rod extends to be in transmission connection with the output shaft of the lifting motor.

8. The integrated transformer oil purification and recovery system according to claim 7, wherein One end of the transmission rod is provided with a receiving part rotatably connected with one end of the second connecting shaft, and the other end is provided with a threaded section in transmission connection with the output shaft of the lifting motor.

9. The integrated transformer oil purification and recovery system according to claim 1, wherein The vacuum tank is provided with a liquid level switch and a pressure sensor at intervals.

10. An integrated transformer oil purification and recovery method, applied to the system according to any one of claims 1 to 9, the method includes: Step S10: Inject the oil sample to be purified into the oil cylinder through the oil inlet; Step S20: When the preset amount of the oil sample is injected, close the vent valve, open the vacuum valve, start the vacuum pump to evacuate the vacuum tank to a vacuum. When the reading of the pressure sensor reaches the set vacuum value, control the vacuum pump to stop working. The range of the set vacuum value is 0 - 4 kPa; Step S30: Turn on the circulation pump to make the oil sample to be purified flow back and forth between the oil cylinder and the circulation pump; Step S40: Under the condition that the cavity is in a vacuum state and the oil sample in the cavity is flowing, start the driving motor and the stirring motor to drive the stirring impeller assembly to rotate and move up and down reciprocally in the oil cylinder to stir the oil sample to be purified; Step S50: When no dissolved gas escapes from the oil sample to be purified or the oil sample enters the vacuum tank through the pipeline under negative pressure to trigger the liquid level switch, turn off the vacuum pump, the circulation pump, the stirring motor and the driving motor to complete the purification and recovery of the oil sample.

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