On-line oil filtering device of transformer

Abstract

The utility model relates to an on-line oil filtering device of a transformer, and belongs to the technical field of electrical equipment. Comprising a first filter, a buffer assembly, a second filter, a vacuum tank, an oil outlet pipeline, a first oil return pipeline, a second oil return pipeline, a third oil return pipeline, an oil inlet pipeline, a control assembly responsible for operation and monitoring of the whole device and a power supply assembly supplying power to the whole device. By means of the first filter, the buffer assembly, the second filter and the vacuum tank, the transformer oil can be directly filtered on line without pausing the use of the transformer, and continuous work of the transformer is guaranteed; meanwhile, the flow speed of the transformer oil can be effectively reduced through the arranged buffer assembly, so that the transformer oil has enough time to precipitate impurities in the buffer tank in the flowing process and has enough time to be in contact with the second filter, and therefore the filtering effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical equipment, and in particular relates to an online oil filter device for a transformer. Background Art

[0002] A transformer is a device that uses the principle of electromagnetic induction to change AC voltage. Its main components are the primary coil, secondary coil and magnetic core. Its main functions include voltage conversion, current conversion, impedance conversion, isolation, voltage stabilization (magnetic saturation transformer), etc.

[0003] In the power system, the transformer is a key equipment, and the stability and safety of its operating state directly affect the normal operation of the entire system. As an important medium for internal insulation and heat dissipation of the transformer, the quality and purity of transformer oil play a vital role in the performance and service life of the transformer. However, during the operation of the transformer, due to the influence of various factors, various impurities and moisture will gradually be generated and accumulated in the transformer oil. These impurities and moisture will not only reduce the insulation performance of the oil, but also accelerate the aging of the oil, causing damage to the transformer.

[0004] At present, the patent with the authorization announcement number CN106531407B discloses a transformer online oil filter device, which includes an oil pump and an oil inlet pipe and an oil outlet pipe connected to the oil pump. The oil outlet pipe is connected in series with a front and a rear two-stage separation filter element, the front stage is a filter element for removing particulate impurities, and the rear stage is a filter element for removing water. When in use, this product is fixed to the ground foundation or the wall of the transformer oil tank, and the oil inlet pipe and the oil outlet pipe are connected to the oil inlet and outlet ports at both ends of the transformer switch oil chamber. Driven by the oil pump, the transformer oil passes through the two-stage separation filter element and circulates continuously to remove impurities and water in the oil. Samples can be taken at the sampling valve for chemical analysis until they meet the requirements. This is done once at regular intervals, thereby extending the service life of the transformer on-load switch. However, the flow rate of the transformer oil will affect the filtering effect. Too fast a flow rate may cause a decrease in the filtering effect or even damage the filter equipment. Summary of the invention

[0005] The purpose of the utility model is to provide a transformer online oil filter device to solve the problems existing in the prior art, in view of the defect that the existing filter directly filters the transformer oil and is provided with a flow rate control component, resulting in an excessively fast flow rate, which reduces the filtering effect and even damages the filtering equipment.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A transformer online oil filter device comprises a first filter, a buffer component, a second filter, a vacuum tank, an oil outlet pipeline, a first oil return pipeline, a second oil return pipeline, a third oil return pipeline, an oil inlet pipeline, a control component responsible for the operation and monitoring of the entire device, and a power supply component for powering the entire device. The buffer component comprises a buffer tank and a first buffer tube, a second buffer tube, and an inverted cone impurity precipitation element arranged between the first buffer tube and the second buffer tube. The oil inlet end of the first filter is connected to the oil outlet end of the transformer through an oil outlet pipeline, a first valve is arranged on the oil outlet pipeline, and the oil outlet end of the first filter is connected to the first buffer through a first oil return pipeline. The oil inlet end of the pipe, the first oil return pipe is provided with a second valve and a first oil pump, the oil outlet end of the first buffer pipe extends into the inverted cone impurity precipitation element, the oil inlet end of the second buffer pipe extends into the inverted cone impurity precipitation element, the bottom end of the inverted cone impurity precipitation element is provided with a first impurity cleaning port, the oil outlet end of the second buffer pipe is connected to the oil inlet end of the second oil filter through the second oil return pipe, a third valve is provided on the second oil return pipe, the oil outlet end of the second oil filter is connected to the oil inlet end of the vacuum tank through the third oil return pipe, the vacuum tank is provided with a fourth valve, the oil outlet end of the vacuum tank is connected to the oil inlet end of the transformer by the oil inlet pipe, and a fifth valve and a second oil pump are provided on the oil inlet pipe.

[0008] A further improvement of the technical solution is that both the first buffer tube and the second buffer tube are spiral buffer tubes.

[0009] Further improvements of the technical solution include: a first filter is provided in the first filter, a second impurity cleaning port is provided on the first filter, and the second impurity cleaning port is located on a side of the first filter close to the oil outlet end of the transformer; a second filter is provided in the second filter, a third impurity cleaning port is provided on the second filter, and the third impurity cleaning port is located on a side of the second filter close to the buffer tank.

[0010] A further improvement of the technical solution is that it also includes a heating component, which is arranged between the first filter and the oil outlet pipeline; the heating component includes an electric heater and an insulation layer and a temperature sensor arranged in the electric heater, the temperature sensor is connected to the input end of the control component, and the electric heater is connected to the output end of the control component.

[0011] A further improvement of the technical solution also includes a bypass pipeline, wherein the oil inlet end of the bypass pipeline is connected to the oil outlet end of the transformer, the oil outlet end of the bypass pipeline is connected to the oil inlet end of the transformer, and a sixth valve and a third oil pump are provided on the bypass pipeline.

[0012] A further improvement of the technical solution is that the control component includes a single-chip microcomputer, a first flow rate sensor, a second flow rate sensor, a third flow rate sensor, a first pressure sensor, a second pressure sensor, a liquid level sensor and a remote control terminal, the first flow rate sensor is installed in the first oil return pipeline, the second flow rate sensor is arranged on the second oil return pipeline, the third flow rate sensor is arranged on the third oil return pipeline, the first pressure sensor is installed in the first filter, the second pressure sensor is installed in the second filter, and the liquid level sensor is installed in the buffer tank; the first flow rate sensor, the second flow rate sensor, the third flow rate sensor, the first pressure sensor, the second pressure sensor and the liquid level sensor are all connected to the input end of the single-chip microcomputer, and the single-chip microcomputer and the remote control terminal are communicatively connected.

[0013] A further improvement of the technical solution is that it also includes an alarm, which is connected to the output end of the single-chip microcomputer.

[0014] The beneficial effect of the utility model is that the utility model can realize the use of the transformer without suspending it and directly filter the transformer oil online through the first filter, the buffer component, the second filter and the vacuum tank, so as to ensure the continuous operation of the transformer; at the same time, the flow rate of the transformer oil can be effectively slowed down through the arranged buffer component, so that the transformer oil has enough time to precipitate impurities in the buffer tank during the flow process, and has enough time to contact with the second filter, thereby improving the filtering effect; in addition, the transformer oil is heated by the heating component to prevent the transformer oil from solidifying or increasing in viscosity at low temperature, thereby improving the filtering effect; finally, the present application is also provided with a bypass pipeline, which can ensure the non-stop operation of the transformer when the first filter, the buffer component, the second filter and the vacuum tank are cleaned or when a fault occurs.

[0015] In addition, the utility model has a reliable design principle, a simple structure and a very broad application prospect.

[0016] It can be seen that compared with the prior art, the present invention has outstanding substantive features and significant progress, and the beneficial effects of its implementation are also obvious. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the structure of the transformer online oil filter device.

[0018] Figure 2 This is a schematic diagram of the relationship of the transformer online oil filter device.

[0019] 100 is a transformer, 110 is a first filter, 111 is a first filter screen, 112 is a second impurity cleaning port, 121 is a buffer tank, 122 is a first buffer tube, 123 is a second buffer tube, 124 is an inverted cone impurity precipitation element, 125 is a third filter screen, 130 is a second filter, 131 is a second filter screen, 132 is a third impurity cleaning port, 140 is a vacuum tank, 151 is an oil outlet pipeline, 152 is a first oil return pipeline, 1521 is a first oil pump, 153 is a second return pipeline, Oil pipeline, 154 is the third oil return pipeline, 155 is the oil inlet pipeline, 1551 is the second oil pump, 160 is the electric heater, 170 is the bypass pipeline, 171 is the third oil pump, 181 is the single-chip microcomputer, 182 is the first flow rate sensor, 183 is the second flow rate sensor, 184 is the third flow rate sensor, 185 is the first pressure sensor, 186 is the second pressure sensor, 187 is the liquid level sensor, 188 is the remote control terminal, 191 is the alarm, and 192 is the power supply component. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0022] like Figure 1 and Figure 2As shown, the utility model provides an online oil filter device for a transformer, comprising a first filter, a buffer component, a second filter, a vacuum tank, an oil outlet pipeline, a first oil return pipeline, a second oil return pipeline, a third oil return pipeline, an oil inlet pipeline, a control component responsible for the operation and monitoring of the entire device, and a power supply component for powering the entire device, the buffer component comprising a buffer tank and a first buffer tube, a second buffer tube, and an inverted cone-shaped impurity precipitation element arranged between the first buffer tube and the second buffer tube; the oil inlet end of the first filter is connected to the oil outlet end of the transformer through the oil outlet pipeline, the oil outlet pipeline is provided with a first valve, and the oil outlet end of the first filter is connected to the oil outlet end of the transformer through the first oil return pipeline To the oil inlet end of the first buffer pipe, a second valve and a first oil pump are arranged on the first oil return pipeline, the oil outlet end of the first buffer pipe extends into the inverted cone-shaped impurity precipitation element, the oil inlet end of the second buffer pipeline extends into the inverted cone-shaped impurity precipitation element, a first impurity cleaning port is arranged at the bottom end of the inverted cone-shaped impurity precipitation element, the oil outlet end of the second buffer pipeline is connected to the oil inlet end of the second oil filter through the second oil return pipe, a third valve is arranged on the second oil return pipeline, the oil outlet end of the second oil filter is connected to the oil inlet end of the vacuum tank through the third oil return pipeline, a fourth valve is arranged on the vacuum tank, the oil outlet end oil inlet pipeline of the vacuum tank is connected to the oil inlet end of the transformer, and a fifth valve and a second oil pump are arranged on the oil inlet pipeline.

[0023] Specifically, a first filter is provided in the first filter, a second impurity cleaning port is provided on the first filter, and the second impurity cleaning port is located on a side of the first filter close to the oil outlet end of the transformer; a second filter is provided in the second filter, a third impurity cleaning port is provided on the second filter, and the third impurity cleaning port is located on a side of the second filter close to the buffer tank.

[0024] Among them, the first buffer tube and the second buffer tube both adopt spiral buffer tubes, or adopt zigzag pipes or maze-shaped pipes to increase the flow path and residence time of the oil in the buffer zone. At the same time, the width and height of the flow channel should also be moderate to ensure that the oil flow can be evenly distributed and fully settled. In addition, in order to improve the filtering effect, a third filter screen is also provided in the buffer tank. The third filter screen is vertically arranged on the side of the inverted cone impurity precipitation element close to the second filter, and the oil inlet end of the second return oil pipe extends into the inverted cone impurity precipitation element, but does not pass through the third filter screen. In addition, the setting of the buffer component can reduce the impact of the transformer oil on the second filter to a certain extent and improve the filtering effect.

[0025] In addition, the transformer online oil filter device also includes a heating component, which is arranged between the first filter and the oil outlet pipeline; the heating component includes an electric heater and an insulation layer and a temperature sensor arranged in the electric heater, the temperature sensor is connected to the input end of the control component, and the electric heater is connected to the output end of the control component.

[0026] In order to ensure the non-stop operation of the transformer, the transformer online oil filter device also includes a bypass pipeline, the oil inlet end of the bypass pipeline is connected to the oil outlet end of the transformer, the oil outlet end of the bypass pipeline is connected to the oil inlet end of the transformer, and the bypass pipeline is provided with a sixth valve and a third oil pump.

[0027] The control component includes a single chip microcomputer, a first flow rate sensor, a second flow rate sensor, a third flow rate sensor, a first pressure sensor, a second pressure sensor, a liquid level sensor and a remote control terminal. The first flow rate sensor is installed in the first oil return pipeline, the second flow rate sensor is arranged on the second oil return pipeline, the third flow rate sensor is arranged on the third oil return pipeline, the first pressure sensor is installed in the first filter, the second pressure sensor is installed in the second filter, and the liquid level sensor is installed in the buffer tank; the first flow rate sensor, the second flow rate sensor, the third flow rate sensor, the first pressure sensor, the second pressure sensor and the liquid level sensor are all connected to the input end of the single chip microcomputer, and the single chip microcomputer and the remote control terminal are connected in communication. Specifically, the single chip microcomputer adopts a single chip microcomputer of model STM32F 103C8T6.

[0028] In order to facilitate the staff to promptly discover the abnormal operation of the transformer online oil filter device, the transformer online oil filter device also includes an alarm, which is connected to the output end of the single-chip microcomputer. The alarm can give a timely alarm when the online oil filter device is blocked.

[0029] The above disclosure is only the preferred implementation mode of the utility model, but the utility model is not limited thereto. Any non-creative changes that can be thought of by technicians in this field, as well as several improvements and modifications made without departing from the principle of the utility model, should fall within the scope of protection of the utility model.

Claims

1. A transformer online oil filter device, characterized in that: The utility model comprises a first filter, a buffer component, a second filter, a vacuum tank, an oil outlet pipeline, a first oil return pipeline, a second oil return pipeline, a third oil return pipeline, an oil inlet pipeline, a control component responsible for the operation and monitoring of the entire device, and a power supply component for supplying power to the entire device. The buffer component comprises a buffer tank and a first buffer tube and a second buffer tube arranged in the buffer tank, and an inverted cone-shaped impurity precipitation element arranged between the first buffer tube and the second buffer tube. The oil inlet end of the first filter is connected to the oil outlet end of the transformer through the oil outlet pipeline, and a first valve is arranged on the oil outlet pipeline. The oil outlet end of the first filter is connected to the oil inlet end of the first buffer tube through the first oil return pipeline. A second valve and a first oil pump are provided on the first oil return pipeline, the oil outlet end of the first buffer pipe extends into the inverted cone-shaped impurity precipitation element, the oil inlet end of the second buffer pipe extends into the inverted cone-shaped impurity precipitation element, a first impurity cleaning port is provided at the bottom end of the inverted cone-shaped impurity precipitation element, the oil outlet end of the second buffer pipe is connected to the oil inlet end of the second oil filter through the second oil return pipe, a third valve is provided on the second oil return pipeline, the oil outlet end of the second oil filter is connected to the oil inlet end of the vacuum tank through the third oil return pipeline, a fourth valve is provided on the vacuum tank, the oil outlet end oil inlet pipeline of the vacuum tank is connected to the oil inlet end of the transformer, and a fifth valve and a second oil pump are provided on the oil inlet pipeline.

2. The transformer online oil filter device according to claim 1, characterized in that: The first buffer tube and the second buffer tube are both spiral buffer tubes.

3. The transformer online oil filter device according to claim 1, characterized in that: A first filter is provided in the first filter, a second impurity cleaning port is provided on the first filter, and the second impurity cleaning port is located on a side of the first filter close to the oil outlet end of the transformer; a second filter is provided in the second filter, a third impurity cleaning port is provided on the second filter, and the third impurity cleaning port is located on a side of the second filter close to the buffer tank.

4. The transformer online oil filter device according to claim 1, characterized in that: It also includes a heating component, which is arranged between the first filter and the oil outlet pipeline; the heating component includes an electric heater and an insulation layer and a temperature sensor arranged in the electric heater, the temperature sensor is connected to the input end of the control component, and the electric heater is connected to the output end of the control component.

5. The transformer online oil filter device according to claim 1, characterized in that: It also includes a bypass pipeline, the oil inlet end of the bypass pipeline is connected to the oil outlet end of the transformer, the oil outlet end of the bypass pipeline is connected to the oil inlet end of the transformer, and the bypass pipeline is provided with a sixth valve and a third oil pump.

6. The transformer online oil filter device according to claim 1, characterized in that: The control component includes a single-chip microcomputer, a first flow rate sensor, a second flow rate sensor, a third flow rate sensor, a first pressure sensor, a second pressure sensor, a liquid level sensor and a remote control terminal. The first flow rate sensor is installed in the first oil return pipeline, the second flow rate sensor is arranged on the second oil return pipeline, the third flow rate sensor is arranged on the third oil return pipeline, the first pressure sensor is installed in the first filter, the second pressure sensor is installed in the second filter, and the liquid level sensor is installed in the buffer tank; the first flow rate sensor, the second flow rate sensor, the third flow rate sensor, the first pressure sensor, the second pressure sensor and the liquid level sensor are all connected to the input end of the single-chip microcomputer, and the single-chip microcomputer and the remote control terminal are communicatively connected.

7. The transformer online oil filter device according to claim 6, characterized in that: The utility model also includes an alarm, and the alarm is connected to the output terminal of the single chip microcomputer.

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