Self-purification transformer

Abstract

The application provides a self-purification transformer, and belongs to the technical field of transformers. The transformer comprises a transformer body, a purification mechanism, a flowmeter and a controller. The flowmeter is arranged on an insulating oil circulation pipeline. The purification mechanism is arranged on the insulating oil circulation pipeline. The purification mechanism comprises a flow guide pipe, a reference shaft, a filter plate and a control arm. The driver and the flowmeter are electrically connected with the controller. The controller is used for regulating the rotating speed of the driver, so that the actual circulation flow of the insulating oil is matched with the preset circulation flow. When the filter plate has a blockage problem, the controller controls the driver to increase the rotating speed. Under the action of centrifugal force, the counterweight is close to the inner wall of the flow guide pipe and pushes the matching ring, so that the residue discharge port is opened. The granular impurities in the insulating oil can be continuously and automatically removed, the insulating performance and the heat dissipation performance of the insulating oil are effectively guaranteed, and the safety and reliability of the transformer during long-term continuous operation are improved.

Description

Technical Field

[0001] This application relates to the field of transformer technology, and more specifically, to a self-cleaning transformer. Background Technology

[0002] In transformers, insulating oil plays multiple roles, including insulation protection, heat dissipation and cooling, arc extinguishing protection, and material protection.

[0003] As transformers operate for longer periods, particulate impurities will inevitably mix into the insulating oil, directly affecting its insulation and heat dissipation properties.

[0004] Currently, to ensure the safe use of transformer oil, the insulating oil is subjected to regular sampling and testing, and is replaced regularly.

[0005] This method has certain detection errors and high labor costs. If detection is not timely, it may cause other problems. In addition, during the replacement interval, as the particulate impurities mixed in the insulating oil gradually increase, its insulation and heat dissipation performance actually declines to varying degrees. Summary of the Invention

[0006] The purpose of this application is to provide a self-cleaning transformer that can continuously and automatically remove particulate impurities from insulating oil, effectively ensuring the insulation and heat dissipation performance of the insulating oil and improving the safety and reliability of the transformer during long-term continuous operation.

[0007] The embodiments of this application are implemented as follows:

[0008] A self-cleaning transformer includes: a transformer body, a cleaning mechanism, a flow meter, and a controller.

[0009] The flow meter is installed in the insulating oil circulation pipeline of the transformer body to detect the circulation flow rate of the insulating oil.

[0010] The impurity removal mechanism is located in the insulating oil circulation pipeline, between the insulating oil circulation pump and the heat sink in the insulating oil circulation pipeline.

[0011] The impurity removal mechanism includes: a guide tube, a reference shaft, a filter plate, and a control arm.

[0012] One end of the guide pipe is connected to the outlet end of the insulating oil circulating pump, and the other end is connected to the inlet end of the heat sink.

[0013] The reference axis is located inside the guide tube and is coaxial with the guide tube.

[0014] The filter plate is located inside the guide tube, and the reference shaft passes through the filter plate. The reference shaft is rotatably fitted to the filter plate and rotates and seals with the filter plate. The reference shaft is driven by the driver of the insulating oil circulating pump.

[0015] The side wall of the guide pipe is provided with a slag discharge port, which is located on the side of the filter plate near the insulating oil circulation pump and is set close to the filter plate.

[0016] The inner wall of the guide pipe is also provided with a relief groove, which extends continuously in a ring shape along the circumference of the guide pipe. The relief groove is located on the side of the filter plate away from the insulating oil circulating pump, and is set close to the filter plate.

[0017] A fitting hole is provided on the side wall of the clearance groove near the filter plate. The fitting hole extends axially along the guide pipe and communicates with the slag discharge port. A locking tongue is slidably fitted into the fitting hole, and a sliding seal is formed between the locking tongue and the fitting hole.

[0018] The end of the locking tongue furthest from the slag discharge port is connected to a mating ring, which is coaxially arranged with the guide pipe. Along the axial direction of the guide pipe, the mating ring is slidably fitted into the relief groove.

[0019] A first elastic element is abutted between the side wall of the relief groove away from the filter plate and the mating ring. The first elastic element is used to push the mating ring so that the locking tongue locks into the slag discharge port, thereby closing the slag discharge port.

[0020] One end of the control arm is hinged to the outer wall of the reference shaft, and the rotation axis of the control arm is set perpendicular to the central axis of the reference shaft. The other end of the control arm is connected to a counterweight.

[0021] Both the driver and the flow meter are electrically connected to the controller, which is used to adjust the speed of the driver so that the actual circulating flow rate of the insulating oil matches the preset circulating flow rate.

[0022] When the filter plate is clogged, the controller controls the driver to increase the speed. Under the action of centrifugal force, the counterweight moves closer to the inner wall of the guide pipe and pushes the mating ring, thereby opening the slag discharge port.

[0023] Furthermore, the guide tube is set in a vertical direction.

[0024] Furthermore, the middle part of the filter plate protrudes towards the side where the insulating oil circulating pump is located.

[0025] Furthermore, a mating blind hole is provided on the end face of the reference shaft away from the insulating oil circulating pump, and the mating blind hole extends along the axial direction of the reference shaft.

[0026] The blind hole contains a first moving member and a second moving member. Along the axial direction of the reference axis, both the first and second moving members are slidably fitted into the blind hole. Along the circumferential direction of the reference axis, both the first and second moving members are fixedly fitted to the reference axis.

[0027] The first moving part and the second moving part are spaced apart, with the first moving part located on the side of the second moving part closer to the insulating oil circulating pump. A mating rod is fixedly connected between the first moving part and the second moving part, and the diameter of the mating rod is smaller than the diameter of the mating blind hole.

[0028] The reference axis, the mating blind hole, and the mating rod are set coaxially.

[0029] The side wall of the reference shaft has an opening that communicates with the mating blind hole, and the opening is set to correspond to the mating rod.

[0030] The control arm is connected to a mating wheel at one end near the reference axis. The mating wheel is rotatably fitted into the opening, and there is a rotational seal between the mating wheel and the opening.

[0031] A second elastic element abuts against the bottom of the first moving part and the hole of the mating blind hole.

[0032] The side wall of the mating rod has a first rack, and the wheel surface of the mating wheel has a second rack, which is located within the mating blind hole. The first rack meshes with the second rack.

[0033] A positioning rod is also fixedly connected inside the guide tube. The positioning rod is located on the side of the reference shaft away from the insulating oil circulation pump. The positioning rod is fixedly connected to a positioning column. The reference shaft is rotatably sleeved on the positioning column, and there is a rotational seal between the reference shaft and the positioning column.

[0034] The end face of the positioning post has an extension arm that extends axially along the reference axis toward the second moving member. A button is located at the end of the extension arm away from the positioning post. The button is electrically connected to the controller.

[0035] The second moving part is connected to an extension rod, which extends axially toward the positioning post along the reference axis. An end block is rotatably fitted to the end of the extension rod away from the second moving part.

[0036] When the slag discharge port is opened, the end block triggers the button, and the controller starts timing from the moment it receives the electrical signal from the button. After a preset time has elapsed, the controller controls the driver to return to the preset minimum speed.

[0037] Furthermore, the counterweight is attached to the side of the filter plate furthest from the insulating oil circulating pump.

[0038] A groove is provided on the side surface of the counterweight that is in contact with the filter plate. A flow guide channel is provided at the bottom of the groove. The flow guide channel extends to the control arm and then to the mating wheel. The flow guide channel further extends to the surface of the mating wheel. The end of the flow guide channel away from the counterweight is located inside the mating blind hole and communicates with the mating blind hole.

[0039] The positioning column has a built-in metering pump. The side wall of the positioning column has an inlet channel that communicates with the inlet end of the metering pump, and the end wall of the positioning column has an outlet channel that communicates with the outlet end of the metering pump.

[0040] The liquid outlet channel is connected to the matching blind hole.

[0041] The first moving part slides and seals with the wall of the blind hole, while the second moving part leaves a gap with the wall of the blind hole.

[0042] The end of the reference shaft furthest from the insulating oil circulating pump has an external gear ring, which is driven by the power input shaft of the metering pump.

[0043] Furthermore, a first stop and a second stop are provided on the wall of the blind hole. The first stop is located on the side of the first moving member away from the second moving member, and the second stop is located on the side of the second moving member away from the first moving member.

[0044] When the driver is at the preset minimum speed, the second moving part is in contact with the second stop. When the slag discharge port is opened, the first moving part is in contact with the first stop.

[0045] Furthermore, at the same time, the groove is connected to at least one filter hole.

[0046] Furthermore, when the drive is at a preset minimum speed, the filter hole communicating with the groove is used as a reference object. The filter hole closest to the center axis of the reference shaft is used as the standard object.

[0047] Using the location of the standard object as a reference point, a reference line is constructed along the circumference of the guide tube. The locations of the other filter holes in the filter plate are all located on the side of the reference line away from the datum axis.

[0048] Furthermore, the guide tube is a straight tube.

[0049] Furthermore, multiple control arms are evenly spaced along the circumference of the guide tube.

[0050] The beneficial effects of the technical solutions in this application include:

[0051] When the filter plate is clogged, the flow rate through the filter plate per unit time will decrease if the speed of the drive remains constant. As a result, the actual circulation flow rate of the insulating oil will be less than the preset circulation flow rate.

[0052] At this point, the controller instructs the driver to increase its rotational speed, thereby re-matching the actual circulating flow rate of the insulating oil with the preset circulating flow rate. This design ensures the continuous and stable circulation efficiency of the insulating oil.

[0053] When the controller increases the speed of the drive, the counterweight, under the action of centrifugal force, will cause the control arm to swing towards the inner wall of the guide tube, bringing the counterweight closer to the inner wall of the guide tube. When the speed of the drive increases to a certain extent, the counterweight will abut against the mating ring and push the mating ring to move away from the filter plate, thereby causing the locking tongue to disengage from the slag discharge port and opening the slag discharge port.

[0054] After the slag discharge port is opened, some insulating oil is discharged from the slag discharge port, thereby flushing out particulate impurities on the filter plate through the guide pipe, achieving the purpose of cleaning the filter plate.

[0055] With this design, the self-cleaning transformer can not only adaptively adjust the speed of the driver, but also clean the particulate impurities filtered by the filter plate according to the actual clogging of the filter plate.

[0056] Overall, the self-cleaning transformer provided in this application embodiment can continuously and automatically remove particulate impurities from the insulating oil, effectively ensuring the insulation and heat dissipation performance of the insulating oil and improving the safety and reliability of the transformer during long-term continuous operation. Attached Figure Description

[0057] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0058] Figure 1 This is a schematic diagram of the overall structure of the self-cleaning transformer provided in the embodiments of this application;

[0059] Figure 2 A schematic diagram of the cleaning mechanism of the self-cleaning transformer provided in the embodiments of this application (when the speed of the driver is at the preset minimum speed);

[0060] Figure 3 This is a schematic diagram of the structure at the slag discharge port;

[0061] Figure 4 A schematic diagram of the impurity removal mechanism of the self-cleaning transformer provided in the embodiments of this application (when the slag discharge port is open);

[0062] Figure 5 This is a schematic diagram showing the fit between the positioning pin and the reference axis;

[0063] Figure 6 This is a schematic diagram of the impurity removal mechanism of the self-removing transformer provided in the embodiments of this application (when the counterweight moves to the edge of the filter plate).

[0064] Explanation of reference numerals in the attached figures:

[0065] Transformer body 100; insulating oil circulation pipeline 110; insulating oil circulation pump 111; heat dissipation vent 112; flow meter 113; guide pipe 200; slag discharge port 210; clearance groove 220; mating hole 221; locking tongue 222; mating ring 230; cover 240; reference shaft 300; mating blind hole 310; first moving part 320; second moving part 330; mating rod 340; opening 350; first stop 360; second stop 370; filter plate 400; control arm 500; counterweight 510; groove 511; guide channel 512; mating wheel 520; positioning rod 600; positioning column 610; extension arm 611; extension rod 612; end block 613; metering pump 700; inlet channel 710; outlet channel 720. Detailed Implementation

[0066] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0067] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0068] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0069] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0070] Furthermore, the terms "vertical" and "parallel" do not mean that the parts must be absolutely vertical or parallel, but can be slightly tilted.

[0071] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0072] The technical solutions of this application will be described by way of example through some embodiments below.

[0073] To overcome the shortcomings of existing technologies, see Figures 1-3 This application provides a self-cleaning transformer, which includes: a transformer body 100, a cleaning mechanism, a flow meter 113, and a controller (not shown in the figure).

[0074] A flow meter 113 is installed in the insulating oil circulation pipeline 110 of the transformer body 100 to detect the circulation flow rate of the insulating oil in the insulating oil circulation pipeline 110.

[0075] The impurity removal mechanism is located in the insulating oil circulation pipeline 110. Specifically, the impurity removal mechanism is located between the insulating oil circulation pump 111 and the heat sink 112 in the insulating oil circulation pipeline 110.

[0076] In this embodiment, the flow meter 113 is located after the impurity removal mechanism and before the heat dissipation vent 112.

[0077] In other words, in the insulating oil circulation pipeline 110, along the flow direction of the insulating oil, the insulating oil passes sequentially through the insulating oil circulation pump 111, the impurity removal mechanism, the flow meter 113, and the heat dissipation vent 112. And this is not the only possibility.

[0078] In this embodiment, the insulating oil circulating pump 111 is a centrifugal circulating pump, but is not limited thereto.

[0079] The impurity removal mechanism includes: a guide pipe 200, a reference shaft 300, a filter plate 400, and a control arm 500.

[0080] In this embodiment, the guide pipe 200 is a straight pipe, and the guide pipe 200 is a circular pipe, and the guide pipe 200 is arranged in a vertical direction. But it is not limited to this.

[0081] One end (bottom end) of the guide pipe 200 is connected to the outlet end of the insulating oil circulating pump 111, and the other end (top end) of the guide pipe 200 is connected to the inlet end of the heat sink 112.

[0082] The reference shaft 300 is located inside the guide tube 200 and is coaxial with the guide tube 200. The diameter of the reference shaft 300 is smaller than the outer diameter of the guide tube 200.

[0083] The filter plate 400 is located inside the guide pipe 200, and the reference shaft 300 passes through the filter plate 400. The reference shaft 300 is rotatably fitted to the filter plate 400 and rotates and seals with the filter plate 400.

[0084] The reference shaft 300 is driven by the driver (not shown in the figure) of the insulating oil circulating pump 111. The specific transmission method and transmission ratio can be flexibly selected according to actual needs, and this application does not impose specific restrictions.

[0085] The side wall of the guide pipe 200 is provided with a slag discharge port 210 that passes through it. The slag discharge port 210 is located on the side of the filter plate 400 near the insulating oil circulation pump 111, and the slag discharge port 210 is set on the surface of the filter plate 400 away from the heat dissipation vent 112.

[0086] In this embodiment, there are multiple slag discharge ports 210, which are evenly spaced along the circumference of the guide pipe 200.

[0087] The inner wall of the guide pipe 200 is also provided with a relief groove 220, which extends continuously in a ring shape along the circumference of the guide pipe 200. The relief groove 220 is located on the side of the filter plate 400 away from the insulating oil circulating pump 111 and close to the surface of the filter plate 400 away from the insulating oil circulating pump 111, and the relief groove 220 is close to the filter plate 400.

[0088] The clearance groove 220 is coaxially arranged with the guide tube 200.

[0089] The side wall of the clearance groove 220 near the filter plate 400 has a mating hole 221. The mating hole 221 extends along the axial direction of the guide pipe 200 and extends to the slag discharge port 210. The mating hole 221 is connected to the slag discharge port 210.

[0090] The mating hole 221 is slidably fitted with a locking tongue 222, and the locking tongue 222 and the mating hole 221 slide to form a seal.

[0091] The end of the locking tongue 222 away from the slag discharge port 210 is fixedly connected to a mating ring 230. All the locking tongues 222 are fixedly connected to the mating ring 230. The mating ring 230 is coaxially set with the guide pipe 200.

[0092] Along the axial direction of the guide tube 200, the mating ring 230 is slidably fitted in the relief groove 220.

[0093] A first elastic element (not shown in the figure) abuts against the mating ring 230 on the side wall of the relief groove 220 away from the filter plate 400. The first elastic element is used to push the mating ring 230 so that the locking tongue 222 locks into the slag discharge port 210, thereby closing the slag discharge port 210.

[0094] One end of the control arm 500 is hinged to the outer wall of the reference shaft 300, and the rotation axis of the control arm 500 is perpendicular to the central axis of the reference shaft 300. The other end of the control arm 500 is connected to a counterweight 510.

[0095] Both the driver and the flow meter 113 are electrically connected to the controller, which is used to adjust the speed of the driver so that the actual circulating flow rate of the insulating oil matches the preset circulating flow rate.

[0096] When the filter plate 400 is not clogged, the controller adjusts the speed of the drive to the preset minimum speed.

[0097] When the filter plate 400 is clogged, the flow rate through the filter plate 400 per unit time will decrease when the speed of the driver remains constant. As a result, the actual circulation flow rate of the insulating oil will be less than the preset circulation flow rate.

[0098] At this point, the controller instructs the driver to increase its rotational speed, thereby re-matching the actual circulating flow rate of the insulating oil with the preset circulating flow rate. This design ensures the continuous and stable circulation efficiency of the insulating oil.

[0099] When the controller increases the speed of the drive, under the action of centrifugal force, the counterweight 510 will drive the control arm 500 to swing towards the inner wall of the guide tube 200, and the counterweight 510 will move closer to the inner wall of the guide tube 200. When the speed of the drive increases to a certain extent, the counterweight 510 abuts against the mating ring 230 and pushes the mating ring 230 to move away from the filter plate 400, thereby causing the locking tongue 222 to disengage from the slag discharge port 210, opening the slag discharge port 210. Figure 4 As shown.

[0100] After the slag discharge port 210 is opened, a portion of the insulating oil is discharged from the slag discharge port 210, thereby flushing out particulate impurities on the filter plate 400 through the guide pipe 200, achieving the purpose of cleaning the filter plate 400.

[0101] Through this design, the self-cleaning transformer can not only adaptively adjust the speed of the driver, but also clean the particulate impurities filtered by the filter plate 400 according to the actual clogging condition of the filter plate 400.

[0102] Overall, the self-cleaning transformer provided in this application embodiment can continuously and automatically remove particulate impurities from the insulating oil, effectively ensuring the insulation and heat dissipation performance of the insulating oil and improving the safety and reliability of the transformer during long-term continuous operation.

[0103] Optionally, a cover 240 can be installed outside the guide pipe 200. The cover 240 covers the outer wall of the guide pipe 200, and the cover 240 and the outer wall of the guide pipe 200 enclose a confluence cavity. All the slag discharge ports 210 are connected to the confluence cavity. In this way, the insulating oil containing particulate impurities in the confluence cavity can be discharged uniformly by a slag discharge pipe for centralized treatment.

[0104] In this embodiment, the middle portion of the filter plate 400 protrudes towards the side where the insulating oil circulation pump 111 is located. Specifically, the degree of protrusion of the filter plate 400 towards the side where the insulating oil circulation pump 111 is located gradually decreases in the direction from the middle portion of the filter plate 400 to the edge of the filter plate 400.

[0105] Please combine Figure 5 A mating blind hole 310 is provided on the end face of the reference shaft 300 away from the insulating oil circulating pump 111, and the mating blind hole 310 extends along the axial direction of the reference shaft 300.

[0106] The blind hole 310 contains a first moving part 320 and a second moving part 330.

[0107] Along the axial direction of the reference axis 300, both the first moving member 320 and the second moving member 330 can be slidably fitted into the mating blind hole 310.

[0108] Along the circumferential direction of the reference axis 300, both the first moving part 320 and the second moving part 330 are fixedly fitted to the reference axis 300.

[0109] The first moving part 320 and the second moving part 330 are arranged at an interval, with the first moving part 320 located on the side of the second moving part 330 closer to the insulating oil circulating pump 111. A mating rod 340 is fixedly connected between the first moving part 320 and the second moving part 330, and the diameter of the mating rod 340 is smaller than the diameter of the mating blind hole 310.

[0110] The reference shaft 300, the mating blind hole 310, and the mating rod 340 are set coaxially.

[0111] The side wall of the reference shaft 300 has an opening 350 that communicates with the mating blind hole 310, and the opening 350 is set at the position of the mating rod 340.

[0112] The control arm 500 is connected to a mating wheel 520 at one end near the reference shaft 300, and the control arm 500 is hinged to the reference shaft 300 via the mating wheel 520. Specifically, the mating wheel 520 is rotatably fitted into the opening 350, and there is a rotational seal between the mating wheel 520 and the opening 350.

[0113] The rotation axis of the mating wheel 520 is perpendicular to the central axis of the reference shaft 300. The diameter line of the reference shaft 300 that passes through the center of gravity of the mating wheel 520 is denoted as the reference diameter line, and both the rotation axis of the mating wheel 520 and the central axis of the reference shaft 300 are perpendicular to this reference diameter line.

[0114] In this embodiment, there are two sets of control arms 500, mating wheels 520, and counterweights 510, with the two sets of control arms 500, two sets of mating wheels 520, and two sets of counterweights 510 respectively located on opposite sides of the reference shaft 300. However, this is not a limitation.

[0115] A second elastic element (not shown in the figure) abuts against the bottom of the mating blind hole 310 between the first moving member 320 and the bottom of the mating blind hole 310. In its natural state, the second elastic element is used to push the first moving member 320, the second moving member 330 and the mating rod 340 away from the bottom of the mating blind hole 310.

[0116] The side wall of the mating rod 340 has a first rack (not shown in the figure), which extends along the axial direction of the mating rod 340.

[0117] The mating wheel 520 has a second rack (not shown in the figure) extending along the wheel surface of the mating wheel 520, and the second rack is arc-shaped.

[0118] The second rack is located within the mating blind hole 310, and remains within the mating blind hole 310 throughout the swinging process of the control arm 500 (during the rotation of the mating wheel 520).

[0119] The first rack meshes with the second rack, thereby enabling the mating wheel 520 to engage with the mating rod 340 in a transmission engagement.

[0120] A positioning rod 600 is also fixedly connected inside the guide pipe 200. The positioning rod 600 is arranged radially along the guide pipe 200. The positioning rod 600 is located on the side of the reference shaft 300 away from the insulating oil circulating pump 111. The positioning rod 600 is spaced apart from the reference shaft 300.

[0121] The positioning rod 600 is fixedly connected to the positioning post 610, which is coaxially arranged with the reference rod. The positioning post 610 extends into the mating blind hole 310 of the reference shaft 300, and the reference shaft 300 is rotatably sleeved on the positioning post 610, with a rotational seal between the reference shaft 300 and the positioning post 610.

[0122] The end face of the positioning post 610 away from the positioning rod 600 has an extension arm 611. The extension arm 611 extends axially along the reference axis 300 toward the second moving member 330. A button (not shown in the figure) is provided at the end of the extension arm 611 away from the positioning post 610. The button is electrically connected to the controller.

[0123] The second moving member 330 is connected to an extension rod 612, which extends axially along the reference shaft 300 toward the positioning post 610. An end block 613 is rotatably fitted to the end of the extension rod 612 away from the second moving member 330. The reference shaft 300. The first moving member 320, the mating rod 340, the second moving member 330, the extension rod 612, and the end block 613 are coaxially arranged. The rotation axis of the end block 613 relative to the extension rod 612 coincides with the central axis of the reference shaft 300.

[0124] In this embodiment, the control arm 500 and the counterweight 510 are located on the side of the mating wheel 520 near the filter plate 400.

[0125] When there is no clogging problem in the filter plate 400, the drive speed is low. Under the action of the second elastic element, the second elastic element pushes the first moving element 320, the second moving element 330, and the mating rod 340 away from the bottom of the mating blind hole 310. The mating rod 340 drives the mating wheel 520 to move the control arm 500 and the counterweight 510 to the position closest to the reference axis 300. At this time, the end block 613 is located on the side of the button near the positioning post 610, and the end block 613 is spaced apart from the button. The mating ring 230 also pushes the locking tongue 222 into the slag discharge port 210 under the action of the first elastic element, thereby closing the slag discharge port 210.

[0126] When the filter plate 400 is clogged, the controller controls the driver to increase the speed. Under the action of centrifugal force, the counterweight 510 will drive the control arm 500 to swing towards the inner wall of the guide tube 200. The counterweight 510 moves closer to the inner wall of the guide tube 200, the mating wheel 520 rotates, and the mating wheel 520 drives the mating rod 340 to compress the second elastic element with the first moving part 320, and the end block 613 moves closer to the button.

[0127] When the drive speed increases to a certain level, the counterweight 510 abuts against the mating ring 230 and pushes the mating ring 230 to overcome the elastic force of the first elastic element and move away from the filter plate 400, thereby causing the locking tongue 222 to disengage from the slag discharge port 210 and opening the slag discharge port 210. At the same time, the end block 613 also abuts against the button and triggers the button, which sends an electrical signal to the controller. The controller starts timing from receiving the electrical signal from the button. After a preset time (the specific duration of the preset time can be flexibly set according to actual needs), the controller controls the drive to return to the preset minimum speed.

[0128] When the speed returns to the preset minimum speed, the centrifugal force decreases, and the mating wheel 520, control arm 500 and counterweight 510 reset under the action of the second elastic element, the mating ring 230 resets under the action of the first elastic element, and the slag discharge port 210 closes again.

[0129] With this design, when the slag discharge port 210 is opened, the controller can accurately control the opening time of the slag discharge port 210 (the opening time matches the preset duration), which facilitates the removal of particulate impurities at the filter plate 400 and reduces the consumption of insulating oil.

[0130] In this embodiment, a first stop 360 and a second stop 370 are provided on the wall of the blind hole 310. The first stop 360 is located on the side of the first moving member 320 away from the second moving member 330, and the second stop 370 is located on the side of the second moving member 330 away from the first moving member 320.

[0131] When the drive is at the preset minimum speed (i.e., when there is no blockage in the filter plate 400), the second moving part 330 is in contact with the second stop part 370.

[0132] When the slag discharge port 210 is opened, the first moving part 320 and the first stop part 360 are in contact.

[0133] Furthermore, the counterweight 510 is in contact with the surface of the filter plate 400 furthest from the insulating oil circulation pump 111. During the rotation of the reference shaft 300, the counterweight 510 remains in contact with this surface. At different drive speeds, the degree to which the counterweight 510 is furthest from the reference shaft 300 varies, but it always remains in contact with the surface of the filter plate 400 furthest from the insulating oil circulation pump 111. In other words, the curvature of the surface of the filter plate 400 furthest from the insulating oil circulation pump 111 matches the rotational curvature of the counterweight 510 relative to the mating wheel 520.

[0134] A groove 511 is formed on the side surface of the counterweight 510 that is in contact with the filter plate 400. A flow guide channel 512 is formed at the bottom of the groove 511. The flow guide channel 512 extends to the control arm 500 and then extends through the control arm 500 to the mating wheel 520. The flow guide channel 512 further extends to the surface of the mating wheel 520. The end of the flow guide channel 512 away from the counterweight 510 is located within and communicates with the mating blind hole 310. During the rotation of the mating wheel 520, the end of the flow guide channel 512 away from the counterweight 510 is always located within and communicates with the mating blind hole 310.

[0135] The positioning column 610 has a built-in metering pump 700. The side wall of the positioning column 610 away from the reference axis 300 has an inlet channel 710 that communicates with the inlet end of the metering pump 700, and the end wall of the positioning column 610 near the second moving member 330 has an outlet channel 720 that communicates with the outlet end of the metering pump 700.

[0136] The liquid outlet channel 720 is connected to the matching blind hole 310.

[0137] The first moving part 320 slides and seals with the wall of the mating blind hole 310, and a gap (not shown in the figure) is left between the second moving part 330 and the wall of the mating blind hole 310 for insulating oil to pass through, and / or the second moving part 330 is provided with a through hole (not shown in the figure) for insulating oil to pass through.

[0138] The reference shaft 300 has an external gear ring (not shown in the figure) at the end away from the insulating oil circulating pump 111. The power input shaft of the metering pump 700 extends through to a fixed position, and the external gear ring is in a transmission engagement with the power input shaft of the metering pump 700. The specific transmission engagement method and transmission ratio between the external gear ring and the power input shaft of the metering pump 700 can be flexibly selected according to actual needs.

[0139] When the driver is working, the reference shaft 300 rotates relative to the positioning post 610, driving the metering pump 700 to operate. The metering pump 700 draws the insulating oil, which has been filtered by the filter plate 400, from the guide pipe 200 through the inlet channel 710, and further sends it into the mating blind hole 310 through the outlet channel 720. After entering the mating blind hole 310, the insulating oil can further enter the area between the first moving member 320 and the second moving member 330, and enter the groove 511 of the counterweight 510 through the guide channel 512, finally being discharged from the opening of the groove 511.

[0140] In this embodiment, at the same time, the groove 511 is in communication with at least one filter hole.

[0141] Optionally, the metering pump 700 may be a gear pump, but is not limited to this.

[0142] With this design, during operation, the metering pump 700 can use the counterweight 510 to backflush the filter holes at different positions on the filter plate 400. Due to the special shape design of the filter plate 400, particulate impurities will accumulate towards the edge of the filter plate 400.

[0143] If the filter plate 400 is less blocked, the drive speed increases slightly, the counterweight 510 moves a shorter distance to the mating ring 230, and the filter holes that can be backflushed are relatively few and concentrated in a position close to the reference tube. If the filter plate 400 has been basically cleared, then the drive speed can be reduced again.

[0144] If the filter plate 400 is heavily clogged, for example, if there is a significant amount of particulate impurities accumulated at the edges of the filter plate 400, the drive speed will gradually increase, and the counterweight 510 will backflush the filter holes. However, since a large amount of particulate impurities have already been filtered out by the filter plate 400, the flow rate at the filter plate 400 has been significantly affected, and the drive speed will continue to increase.

[0145] When the counterweight 510 moves to the edge of the filter plate 400, it can backflush the filter holes at the edge of the filter plate 400, thereby reducing the adhesion of particulate impurities at the edge of the filter plate 400. Figure 6 As shown.

[0146] When the drive speed increases to a certain level, the counterweight 510 abuts against the mating ring 230 and pushes the mating ring 230 to overcome the elastic force of the first elastic element and move away from the filter plate 400. This causes the locking tongue 222 to disengage from the slag discharge port 210, opening the slag discharge port 210. Since the particulate impurities at the edge of the filter plate 400 have already been agitated and have a lower adsorption degree, these particulate impurities can be discharged from the slag discharge port 210 more quickly and thoroughly. The opening time of the slag discharge port 210 can be shorter, and the loss of insulating oil is also smaller.

[0147] Furthermore, when the drive is at a preset minimum speed, the filter hole communicating with the groove 511 is used as a reference object. The filter hole closest to the central axis of the reference shaft 300 is used as the standard object.

[0148] Using the location of the standard object as a reference point, a reference line is constructed along the circumference of the guide tube 200, and the reference line is a circle coaxial with the reference axis 300.

[0149] The locations of all filter holes on filter plate 400, except for the standard object, are located on the side of the reference line away from the reference axis 300.

[0150] Through this design, the counterweight 510 can more fully backwash the filter holes of the filter plate 400, reducing the residue of particulate impurities on the filter plate 400.

[0151] In summary, the self-cleaning transformer provided in this application embodiment can continuously and automatically remove particulate impurities from the insulating oil, effectively ensuring the insulation and heat dissipation performance of the insulating oil and improving the safety and reliability of the transformer during long-term continuous operation.

[0152] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A self-cleaning transformer, characterized in that, include: Transformer body, impurity removal mechanism, flow meter and controller; The flow meter is installed in the insulating oil circulation pipeline of the transformer body to detect the circulation flow rate of the insulating oil. The impurity removal mechanism is located in the insulating oil circulation pipeline and between the insulating oil circulation pump and the heat sink in the insulating oil circulation pipeline. The impurity removal mechanism includes: a guide tube, a reference shaft, a filter plate, and a control arm; One end of the guide pipe is connected to the outlet end of the insulating oil circulating pump, and the other end is connected to the inlet end of the heat dissipation radiator. The reference axis is located inside the guide tube and is coaxially arranged with the guide tube; The filter plate is disposed inside the guide pipe, the reference shaft passes through the filter plate, the reference shaft is rotatably fitted to the filter plate and rotates and seals with the filter plate; the reference shaft is driven by the driver of the insulating oil circulation pump. The side wall of the guide pipe is provided with a slag discharge port, which is located on the side of the filter plate near the insulating oil circulation pump and is set close to the filter plate. The inner wall of the guide pipe is also provided with a relief groove, which extends continuously in a ring shape along the circumference of the guide pipe; the relief groove is located on the side of the filter plate away from the insulating oil circulating pump, and the relief groove is set close to the filter plate. The clearance groove has a mating hole on the side wall near the filter plate. The mating hole extends along the axial direction of the guide pipe and communicates with the slag discharge port. A locking tongue is slidably fitted into the mating hole, and the locking tongue and the mating hole slide to seal each other. The locking tongue is connected to a mating ring at the end away from the slag discharge port. The mating ring is coaxially arranged with the guide pipe. Along the axial direction of the guide pipe, the mating ring is slidably fitted into the relief groove. A first elastic element is abutted between the side wall of the clearance groove away from the filter plate and the mating ring. The first elastic element is used to push the mating ring so that the locking tongue locks into the slag discharge port, thereby closing the slag discharge port. One end of the control arm is hinged to the outer wall of the reference shaft, and the rotation axis of the control arm is perpendicular to the central axis of the reference shaft; the other end of the control arm is connected to a counterweight. Both the driver and the flow meter are electrically connected to the controller, which is used to regulate the rotational speed of the driver so that the actual circulating flow rate of the insulating oil matches the preset circulating flow rate. When the filter plate is clogged, the controller controls the driver to increase the rotation speed. Under the action of centrifugal force, the counterweight moves closer to the inner wall of the guide pipe and pushes the mating ring, thereby opening the slag discharge port.

2. The self-cleaning transformer according to claim 1, characterized in that, The guide tube is set in a vertical direction.

3. The self-cleaning transformer according to claim 1, characterized in that, The middle part of the filter plate protrudes towards the side where the insulating oil circulating pump is located.

4. The self-cleaning transformer according to claim 1, characterized in that, A mating blind hole is provided on the end face of the reference shaft away from the insulating oil circulating pump, and the mating blind hole extends along the axial direction of the reference shaft; The mating blind hole contains a first moving member and a second moving member; along the axial direction of the reference axis, both the first moving member and the second moving member are slidably fitted into the mating blind hole; along the circumferential direction of the reference axis, both the first moving member and the second moving member are fixedly fitted into the reference axis. The first moving part and the second moving part are spaced apart, with the first moving part located on the side of the second moving part closer to the insulating oil circulating pump; a mating rod is fixedly connected between the first moving part and the second moving part, and the diameter of the mating rod is smaller than the diameter of the mating blind hole; The reference shaft, the mating blind hole, and the mating rod are coaxially arranged; The side wall of the reference shaft has an opening that communicates with the mating blind hole, and the opening is provided corresponding to the mating rod; The control arm is connected to a mating wheel at one end near the reference axis. The mating wheel is rotatably fitted into the opening, and there is a rotational seal between the mating wheel and the opening. A second elastic element abuts against the bottom of the mating blind hole between the first moving component and the hole. The side wall of the mating rod has a first rack, and the wheel surface of the mating wheel has a second rack, the second rack being located within the mating blind hole; the first rack meshes with the second rack; A positioning rod is also fixedly connected inside the guide tube. The positioning rod is located on the side of the reference shaft away from the insulating oil circulation pump. A positioning column is fixedly connected to the positioning rod. The reference shaft is rotatably sleeved on the positioning column. The reference shaft and the positioning column are rotatably sealed. The end face of the positioning post has an extension arm, which extends axially toward the second moving member along the reference axis. A button is provided at the end of the extension arm away from the positioning post; the button is electrically connected to the controller. The second moving part is connected to an extension rod, which extends axially toward the positioning post along the reference axis, and an end block is rotatably fitted at the end of the extension rod away from the second moving part; When the slag discharge port is opened, the end block triggers the button. The controller starts timing from the moment it receives the electrical signal from the button. After a preset time, the controller controls the driver to return to the preset minimum speed.

5. The self-cleaning transformer according to claim 4, characterized in that, The counterweight is in contact with the surface of the filter plate on the side away from the insulating oil circulating pump; The counterweight has a groove on the side surface that is in contact with the filter plate. A flow guide channel is formed at the bottom of the groove. The flow guide channel extends to the control arm and then to the mating wheel. The flow guide channel further extends to the surface of the mating wheel. One end of the flow guide channel away from the counterweight is located inside the mating blind hole and communicates with the mating blind hole. The positioning column has a built-in metering pump; the side wall of the positioning column has an inlet channel that communicates with the inlet end of the metering pump, and the end wall of the positioning column has an outlet channel that communicates with the outlet end of the metering pump. The liquid outlet channel is connected to the mating blind hole; The first moving part slides and seals with the wall of the mating blind hole, and a gap is left between the second moving part and the wall of the mating blind hole; The reference shaft has an external gear ring at the end away from the insulating oil circulating pump, and the external gear ring is in drive engagement with the power input shaft of the metering pump.

6. The self-cleaning transformer according to claim 5, characterized in that, The wall of the blind hole is provided with a first stop and a second stop; the first stop is located on the side of the first moving member away from the second moving member, and the second stop is located on the side of the second moving member away from the first moving member; When the driver is at the preset minimum speed, the second moving part is in contact with the second stop part; When the slag discharge port is opened, the first moving part and the first stop part are in contact.

7. The self-cleaning transformer according to claim 5, characterized in that, At the same time, the groove is in communication with at least one filter hole.

8. The self-cleaning transformer according to claim 7, characterized in that, When the driver is at the preset minimum speed, the filter hole communicating with the groove is used as a reference object; the filter hole in the reference object that is closest to the central axis of the reference shaft is used as the standard object; Using the location of the standard object as a reference point, a reference line is constructed along the circumference of the guide tube; the locations of the other filter holes of the filter plate are all located on the side of the reference line away from the reference axis.

9. The self-cleaning transformer according to claim 1, characterized in that, The guide tube is a straight tube.

10. The self-cleaning transformer according to claim 1, characterized in that, Multiple control arms are evenly spaced along the circumference of the guide tube.

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