CN-121839372-B - Self-impurity-removing transformer

CN121839372BCN 121839372 BCN121839372 BCN 121839372BCN-121839372-B

Abstract

The application provides a self-impurity-removing transformer, and belongs to the technical field of transformers. The device comprises a transformer body, a impurity removing mechanism, a flowmeter and a controller. The flowmeter is arranged in the insulating oil circulation pipeline. The impurity removing mechanism is arranged on the insulating oil circulating pipeline. The impurity removing mechanism comprises a flow guiding pipe, a reference shaft, a filter plate and a control arm. The driver and the flowmeter are electrically connected with the controller, and the controller is used for regulating and controlling the rotating speed of the driver so as to enable the actual circulation flow of the insulating oil to be matched with the preset circulation flow. When the filter plate is blocked, the controller controls the driver to increase the rotating speed, and under the action of centrifugal force, the counterweight piece approaches to the inner wall of the flow guide pipe and pushes the matching ring, so that the slag discharging port is opened. The device can continuously and automatically remove the particle impurities in the insulating oil, effectively ensure the insulating property and the heat dissipation property of the insulating oil, and improve the safety and the reliability of the transformer in long-term continuous operation.

Inventors

Rao Xingning
YANG XIAOHONG
ZHANG ZHENGKANG

Assignees

四川特种变压器厂

Dates

Publication Date: 20260508
Application Date: 20260312

Claims (10)

1. The self-impurity-removing transformer is characterized by comprising a transformer body, an impurity-removing mechanism, a flowmeter and a controller; the flowmeter is arranged on an insulating oil circulation pipeline of the transformer body and used for detecting the circulation flow of insulating oil; The impurity removing mechanism is arranged on the insulating oil circulating pipeline and is positioned between an insulating oil circulating pump and a heat radiating row of the insulating oil circulating pipeline; the impurity removing mechanism comprises a flow guide pipe, a reference shaft, a filter plate and a control arm; one end of the flow guide pipe is communicated with the outlet end of the insulating oil circulating pump, and the other end of the flow guide pipe is communicated with the inlet end of the heat dissipation row; the reference shaft is arranged in the guide pipe and is coaxially arranged with the guide pipe; the filter plate is arranged in the guide pipe, the reference shaft penetrates through the filter plate, and the reference shaft is rotatably matched with the filter plate and is rotationally sealed with the filter plate; The side wall of the flow guide pipe is provided with a slag discharging port, the slag discharging port is positioned at one side of the filter plate close to the insulating oil circulating pump, and the slag discharging port is arranged close to the filter plate; The inner wall of the flow guide pipe is also provided with a yielding groove which extends continuously to form a ring shape along the circumferential direction of the flow guide pipe, the yielding groove is positioned at one side of the filter plate far away from the insulating oil circulating pump, and the yielding groove is arranged close to the filter plate; the groove wall of one side of the abdication groove, which is close to the filter plate, is provided with a matching hole which extends along the axial direction of the flow guide pipe and is communicated with the slag discharge port; The lock tongue is connected with a matching ring at one end far away from the slag discharge port, and the matching ring and the flow guide pipe are coaxially arranged; A first elastic piece is abutted between the groove wall of one side of the abdication groove far away from the filter plate and the matching ring, and the first elastic piece is used for pushing the matching ring so as to lock the lock tongue into the slag discharge port, thereby closing the slag discharge port; One end of the control arm is hinged to the outer side wall of the reference shaft, and the axis of rotation of the control arm is perpendicular to the central axis of the reference shaft; the driver and the flowmeter are electrically connected with the controller, and the controller is used for regulating and controlling the rotating speed of the driver so as to enable the actual circulation flow of the insulating oil to be matched with the preset circulation flow; When the filter plate has a blocking problem, the controller controls the driver to increase the rotating speed, and under the action of centrifugal force, the counterweight piece approaches to the inner wall of the flow guide pipe and pushes the matching ring, so that the slag discharging port is opened.
2. The self-cleaning transformer of claim 1, wherein the draft tube is disposed in a vertical direction.
3. The self-cleaning transformer according to claim 1, wherein the middle portion of the filter plate protrudes toward a side where the insulating oil circulation pump is located.
4. The self-impurity-removing transformer according to claim 1, wherein a matching blind hole is formed in an end face of the reference shaft far away from the insulating oil circulating pump, and the matching blind hole extends along the axial direction of the reference shaft; The first moving part and the second moving part are arranged in the matched blind hole; the first moving piece and the second moving piece are both matched in the matched blind hole in a sliding way along the axial direction of the reference shaft; The first moving part and the second moving part are arranged at intervals, the first moving part is positioned at one side of the second moving part, which is close to the insulating oil circulating pump, a matching rod is fixedly connected between the first moving part and the second moving part, and the diameter of the matching rod is smaller than the aperture of the matching blind hole; the reference shaft, the matching blind hole and the matching rod are coaxially arranged; an opening communicated with the matched blind hole is formed in the side wall of the reference shaft, and the opening is arranged corresponding to the matched rod; One end of the control arm, which is close to the reference shaft, is connected with a matching wheel, the matching wheel is rotatably matched in the opening, and the matching wheel and the opening are rotationally sealed; A second elastic piece is abutted between the first moving piece and the bottom of the matched blind hole; The side wall of the matching rod is provided with a first rack, and the wheel surface of the matching wheel is provided with a second rack, and the second rack is positioned in the matching blind hole; the guide pipe is internally and fixedly connected with a positioning rod, the positioning rod is positioned at one side of the reference shaft far away from the insulating oil circulating pump, the positioning rod is fixedly connected with a positioning column, the reference shaft is rotatably sleeved on the positioning column, and the reference shaft and the positioning column are rotationally sealed; The end face of the positioning column is provided with an extension arm which extends towards the second moving part along the axial direction of the reference shaft, and one end of the extension arm, which is far away from the positioning column, is provided with a button which is electrically connected with the controller; the second moving part is connected with an extension rod, the extension rod extends towards the positioning column along the axial direction of the reference shaft, and one end of the extension rod, which is far away from the second moving part, is in rotating fit with an end block; When the slag discharging port is opened, the end block triggers the button, the controller starts timing from receiving the electric signal of the button, and after the preset time length passes, the controller controls the driver to return to the preset minimum rotating speed.
5. The self-cleaning transformer of claim 4, wherein the weight is attached to a surface of the filter plate on a side remote from the insulating oil circulation pump; A groove is formed in the surface of one side, attached to the filter plate, of the weight piece, a flow guide runner is formed in the bottom of the groove, extends to the control arm and extends to the matching wheel through the control arm, further extends to the surface of the matching wheel, and is located in the matching blind hole and communicated with the matching blind hole away from an end opening of the weight piece; The side wall of the positioning column is provided with a liquid inlet flow passage communicated with the inlet end of the quantitative pump, and the end wall of the positioning column is provided with a liquid outlet flow passage communicated with the outlet end of the quantitative pump; The liquid outlet flow passage is communicated with the matched blind hole; The first moving part is in sliding seal with the hole wall of the matched blind hole, and a gap is reserved between the second moving part and the hole wall of the matched blind hole; and one end of the reference shaft, which is far away from the insulating oil circulating pump, is provided with an outer gear ring which is in transmission fit with the power input shaft of the constant displacement pump.
6. The self-cleaning transformer of claim 5, wherein the hole wall of the matching blind hole is provided with a first stop piece and a second stop piece, the first stop piece is positioned at one side of the first moving piece far away from the second moving piece, and the second stop piece is positioned at one side of the second moving piece far away from the first moving piece; When the driver is at the preset minimum rotation speed, the second moving piece is attached to the second stop piece, and when the slag discharging port is opened, the first moving piece is attached to the first stop piece.
7. The self-cleaning transformer of claim 5, wherein the recess is in communication with at least 1 filter hole at the same time.
8. The self-cleaning transformer according to claim 7, wherein when the driver is at the preset minimum rotation speed, a filter hole communicated with the groove is taken as a reference object, and a filter hole closest to a central axis of the reference shaft in the reference object is taken as a standard object; And taking the position point of the standard object as a reference point, constructing a reference line along the circumferential direction of the flow guide pipe by the reference point, wherein the position points of other filter holes of the filter plate are all positioned on one side of the reference line far away from the reference shaft.
9. The self-cleaning transformer of claim 1, wherein the draft tube is a straight tube.
10. The self-cleaning transformer of claim 1, wherein a plurality of the control arms are disposed at uniform intervals along the circumferential direction of the draft tube.

Description

Self-impurity-removing transformer Technical Field The application relates to the technical field of transformers, in particular to a self-impurity-removing transformer. Background In the transformer, the insulating oil plays roles of insulating protection, heat dissipation and cooling, arc extinction protection, material protection and the like. As the operation time of the transformer increases, particulate impurities are inevitably mixed in the insulating oil, and these particulate impurities directly affect the insulating performance and heat dissipation performance of the insulating oil. At present, in order to ensure the use safety of transformer oil, a mode of periodic sampling detection and periodic replacement is adopted for insulating oil. This mode has certain detection error, and the human cost is high, if detect untimely, can cause other problems. Further, as the particulate impurities mixed in the insulating oil gradually increase during the interval of replacement, the insulating performance and heat dissipation performance thereof have actually been deteriorated to different extents. Disclosure of Invention The application aims to provide a self-impurity-removing transformer which can continuously and automatically remove particle impurities in insulating oil, effectively ensure the insulating property and heat dissipation property of the insulating oil and improve the safety and reliability of the transformer in long-term continuous operation. Embodiments of the present application are implemented as follows: a self-impurity-removing transformer comprises a transformer body, an impurity-removing mechanism, a flowmeter and a controller. The flowmeter is arranged on the insulating oil circulation pipeline of the transformer body and used for detecting the circulation flow of the insulating oil. The impurity removing mechanism is arranged on the insulating oil circulating pipeline and is positioned between the insulating oil circulating pump and the heat radiating row of the insulating oil circulating pipeline. The impurity removing mechanism comprises a flow guiding pipe, a reference shaft, a filter plate and a control arm. One end of the honeycomb duct is communicated with the outlet end of the insulating oil circulating pump, and the other end is communicated with the inlet end of the heat dissipation row. The reference shaft is arranged in the guide pipe and is coaxially arranged with the guide pipe. The filter board is arranged in the guide pipe, the reference shaft penetrates through the filter board, and the reference shaft is rotatably matched with the filter board and is rotationally sealed with the filter board. The reference shaft is in transmission fit with a driver of the insulating oil circulating pump. The side wall of the flow guide pipe is provided with a slag discharging port, the slag discharging port is positioned at one side of the filter plate close to the insulating oil circulating pump, and the slag discharging port is arranged close to the filter plate. The inner wall of the honeycomb duct is also provided with a relief groove which extends continuously to form a ring shape along the circumference of the honeycomb duct. The groove of stepping down is located the filter plate and keeps away from one side of insulating oil circulating pump, and the groove of stepping down is close to the filter plate setting. The groove wall of one side of the abdication groove, which is close to the filter plate, is provided with a matching hole which extends along the axial direction of the flow guide pipe and is communicated with the slag discharging port. The matching hole is in sliding fit with a lock tongue, and sliding seal is arranged between the lock tongue and the matching hole. The bolt is far away from the slag discharge port one end of the connecting rod is connected with a matching ring, the matching ring and the flow guiding pipe are coaxially arranged. Along the axial direction of the honeycomb duct, the cooperation ring is slidably matched in the abdication groove. The groove wall of one side of the abdication groove far away from the filter plate is abutted with the matching ring, and the first elastic piece is used for pushing the matching ring so as to lock the lock tongue into the slag discharging port, thereby closing the slag discharging port. One end of the control arm is hinged to the outer side 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 with a weight piece. The driver and the flowmeter are electrically connected with the controller, and the controller is used for regulating and controlling the rotating speed of the driver so as to enable the actual circulation flow of the insulating oil to be matched with the preset circulation flow. When the filter plate is blocked, the controller controls the driver to increase the rotating spee