CN113713453B - A filter control device for transformer oil and its control method - Google Patents

Abstract

The invention discloses a filter control system for transformer oil and a control method thereof, comprising a plurality of filter boxes, a classification box, a storage box and a controller. The interior of the filter box is filtered through a plurality of filter screens The inside of the box is longitudinally cut to form a filter grid, and the filter screen is from left to right, and the pore size of the filter screen decreases in turn. The top of each filter grid is equipped with a liquid level detection sensor, and the rightmost filter grid is equipped with pipes. The pipeline is connected with the storage box, the upper end of each filter box is equipped with a telescopic device, and the bottom of the classification box is connected with the filter box on the left side of each filter box through a plurality of pipelines. The box body is connected to the bottom of the filter grid on the far right side of the filter box through a pipeline. The control system can filter the transformer oil in a stepped structure, so that the transformer oil can meet the requirements of the transformer.

Description

A filter control device for transformer oil and its control method

technical field

The invention belongs to the technical field of electric power, and relates to a filter control device for transformer oil and a control method thereof.

Background technique

The transformer is a device that uses the principle of electromagnetic induction to change the AC voltage. The main components are the primary coil, the secondary coil and the iron core (magnetic core). The main functions are: voltage transformation, current transformation, impedance transformation, isolation, voltage stabilization (magnetic saturation transformer), etc. According to the use, it can be divided into: power transformers and special transformers (electric furnace transformers, rectifier transformers, power frequency test transformers, voltage regulators, mining transformers, audio transformers, intermediate frequency transformers, high frequency transformers, impact transformers, instrument transformers, electronic transformers , reactors, transformers, etc.).

Due to the high temperature generated when the transformer is working, most transformers currently use transformer oil for cooling. However, when working for a long time, the transformer oil inside the transformer has impurities. Poor, serious will cause damage to the electrical equipment inside the transformer, so it is necessary to filter the transformer oil.

Contents of the invention

In order to solve the above problems, the present invention provides a filter control device for transformer oil and its control method. The control device can filter the transformer oil in a stepped structure to meet the requirements of the transformer.

The invention provides a filter control device for transformer oil, which includes multiple filter boxes, a sorting box, a storage box and a controller. The interior of the filter box is cut longitudinally by multiple filter screens , to form a filter grid, and the filter screen from left to right, the aperture of the filter screen decreases in turn, each filter grid is equipped with a liquid level detection sensor, the rightmost filter grid is equipped with a pipe, the pipe is connected to the storage box The upper end of each filter grid is equipped with a telescopic device. The telescopic rod of the telescopic device is equipped with foam. Under the action of the telescopic device, the foam is placed in the transformer oil, thereby increasing the liquid level of the transformer oil in the filter grid. High, the pressure at the bottom of the transformer oil increases, and the flow of transformer oil filtered from the filter screen is increased. The bottom of the classification box is connected to the filter grid on the left side of each filter box through multiple pipes. There is a solenoid valve on the pipe. The storage box is connected to the bottom of the filter grid on the far right side of the filter box through a pipeline.

Further, the controller includes an operation panel, a control chip, a digital output module, a signal detection module and a signal output module, the control chip is connected to the operation panel, the digital output module, the signal detection module and the signal output module, and the The operation panel has an operation interface, has operation buttons and can set parameters, the digital output module is connected with the solenoid valve, the signal detection module is connected with the liquid level detection sensor, and the signal output module is connected with the telescopic device.

Further, the liquid level detection sensor includes a detection port and a signal transmission port, the detection port can detect the liquid level value in each filter grid, and the signal transmission port is connected with the signal detection module of the controller through a connecting line, so that the control The device can detect the parameter value in the liquid level sensor.

Further said telescopic device comprises an electromagnetic telescopic device and a telescopic rod, wherein the telescopic rod is installed in the electromagnetic telescopic device, and the electromagnetic telescopic device has a power input end and a control end, and the power input end is connected to a power supply through a connection line, and the control end It is connected with the digital output module of the controller through the connection line, so that the controller can automatically run the telescopic rod of the telescopic device to stretch out.

Further, the electromagnetic valve includes a valve body and an electromagnetic coil, wherein the electromagnetic coil is installed on the valve body, and the valve body is operated by conducting the electromagnetic coil, and the electromagnetic coil is connected with the digital output module of the controller through a connection line, Enables the controller to automatically operate the solenoid valve.

The steps of a control method for a filter control device for transformer oil are as follows:

Step 1: Set the liquid level range value of transformer oil in each filter grid in each filter box in the controller, and place the transformer oil in the classification box;

Step 2: Operate the solenoid valves in the pipeline at the bottom of the classification box through the controller, so that the transformer oil in the classification box is injected into the leftmost filter grid in the filter box, and the transformer oil is placed in the leftmost filter grid of the filter box;

Step 3: When the transformer oil in the leftmost filter compartment reaches the upper limit of the liquid level range set by the controller, the controller closes the solenoid valve at the bottom of the sorting box to stop the transformer oil in the sorting box. into the filter box;

Step 4: After the transformer oil in the leftmost filter grid is filtered from the filter screen, the overall liquid level drops, and the controller runs the expansion device at the position, so that the foam on the top of the expansion device is placed in the transformer oil, so that the liquid level of the transformer oil rises , reaching the upper limit of the liquid level of the filter grid set by the controller;

Step 5: After the transformer oil in the filter grid on the far left of the filter box reaches the lower limit of the liquid level range set by the controller, the controller opens the solenoid valve at the bottom of the sorting box where it is located to make the transformer oil in the sorting box Inject into the filter box

Step 6: After the transformer oil passes through the second filter grid, repeat steps 3 and 4 until the transformer oil reaches the rightmost filter grid of the filter box;

Step 7: Transformer oil After the transformer oil reaches the filter grid on the far right side of the filter box, pour the filtered transformer oil into the storage box through the bottom pipe.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of a filter control device for transformer oil invented;

Fig. 2 is a structural schematic diagram of a filter box in a filter control device for transformer oil invented;

Fig. 3 is a schematic diagram of the control structure of a filter control device for transformer oil;

Fig. 4 is an illustration of an embodiment of the invention of a filter control device for transformer oil.

In the figure: 1. Filter box; 2. Classification box; 3. Storage box; 4. Controller; 5. Filter screen; 6. Liquid level detection sensor; 7. Telescopic device; 8. Foam; 9. Solenoid valve .

Detailed ways

The specific implementation of the invention of a filter control device for transformer oil and its control method will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the present invention provides a filter control device for transformer oil, including a plurality of filter boxes 1, a classification box 2, a storage box 3 and a controller 4, as shown in Figure 2, the The inside of the filter box 1 is longitudinally cut through a plurality of filter screens 5 to form a filter grid, and the filter screen 5 is from left to right, and the apertures of the filter screen 5 are successively reduced. There is a liquid level detection sensor 6, and a pipe is installed on the filter grid on the far right, which is connected to the storage box 3, and a telescopic device 7 is installed on the upper end of each filter grid, and a foam 8 is installed on the telescopic rod of the telescopic device 7. Under the action of the telescopic device 7, the foam 8 is placed in the transformer oil, thereby raising the liquid level of the transformer oil in the filter grid, increasing the pressure at the bottom of the transformer oil, increasing the flow rate of the transformer oil filtered from the filter screen 5, The bottom of the sorting box 2 is connected to the filter grid on the left side of each filter box 1 through a plurality of pipelines. The pipeline has a solenoid valve 9, and the storage box 3 is connected to the rightmost filter grid of the filter box 1 through the pipeline. connected at the bottom.

As shown in Figure 3, the controller 4 includes an operation panel, a control chip, a digital output module, a signal detection module and a signal output module, and the control chip and the operation panel, the digital output module, the signal detection module and the signal output The modules are connected, the operation panel has an operation interface, has operation buttons and can set parameters, the digital output module is connected with the solenoid valve 9, the signal detection module is connected with the liquid level detection sensor 6, and the signal output module is connected with the liquid level detection sensor 6. Telescopic device 7 links to each other.

According to the above, wherein the liquid level detection sensor 6 includes a detection port and a signal transmission port, the detection port can detect the liquid level value in each filter grid, and the signal transmission port is connected to the signal detection module of the controller 4 through a connection line are connected so that the controller 4 can detect the parameter value in the liquid level sensor.

According to the above, wherein the telescopic device 7 includes an electromagnetic telescopic device and a telescopic rod, wherein the telescopic rod is installed in the electromagnetic telescopic device, the electromagnetic telescopic device has a power input end and a control end, and the power input end is connected to the power supply through a connecting line , the control end is connected to the digital output module of the controller 4 through a connecting wire, so that the controller 4 can automatically run the telescopic rod of the telescopic device 7 to stretch out.

According to the above, wherein the electromagnetic valve 9 includes a valve body and an electromagnetic coil, wherein the electromagnetic coil is installed on the valve body, and the valve body is operated by conducting the electromagnetic coil, and the electromagnetic coil is connected to the digital quantity of the controller 4 through a connecting line The output modules are connected to enable the controller 4 to automatically operate the solenoid valves.

The steps of a control method for a filter control device for transformer oil are as follows:

Step 1: Set the liquid level range value of transformer oil in each filter grid in each filter box 1 in the controller 4, and place the transformer oil in the classification box 2;

Step 2: Operate the solenoid valves 9 in the pipeline at the bottom of the classification box 2 through the controller 4, so that the transformer oil in the classification box 2 is injected into the leftmost filter grid in the filter box 1, and the transformer oil is placed on the leftmost side of the filter box 1 in the filter grid;

Step 3: When the transformer oil in the leftmost filter compartment reaches the upper limit of the liquid level range value set by the controller 4, the controller 4 closes the solenoid valve 9 at the bottom of the sorting box 2, so that the sorting box The transformer oil in 2 stops injecting into filter box 1;

Step 4: After the transformer oil in the filter grid on the far left is filtered from the filter screen 5, the overall liquid level drops, and the controller 4 operates the expansion device 7 at the position, so that the foam 8 on the top of the expansion device 7 is placed in the transformer oil, so that the transformer The liquid level of oil rises and reaches the liquid level upper limit value of the filter grid set by the controller 4;

Step 5: After the transformer oil in the leftmost filter grid of the filter box 1 reaches the lower limit of the liquid level range value set by the controller 4, the controller 4 opens the solenoid valve 9 at the bottom of the classification box 2 where it is located to make the classification Transformer oil in box 2 is injected into filter box 1

Step 6: After the transformer oil passes through the second filter grid, repeat steps 3 and 4 until the transformer oil reaches the rightmost filter grid of filter box 1;

Step 7: Transformer Oil After the transformer oil reaches the filter grid on the far right side of the filter box 1, pour the filtered transformer oil into the storage box 3 through the bottom pipe.

The controller 4 transports the transformer oil in the sorting box 2 to each filter box 1 through pipelines, and filters the transformer oil through the filter box 1 .

As shown in Fig. 4, the transformer oil will be described in detail below according to the embodiments of three filter grids.

The three filter grids are the first filter grid, the second filter grid and the third filter grid from left to right. When setting the liquid level range value, the parameter value decreases from left to right as a whole. For example, the liquid level range value of the first filter grid is 50 to 100, the liquid level range value of the second filter grid is 50 to 80, and the third filter grid does not need to set a parameter value. The controller 4 operates the solenoid valve 9 connected to the filter box 1 and the classification box 2, so that the transformer oil in the classification box 2 is injected into the first filter grid. Because there are impurities in the transformer oil, the transformer oil will be filtered slowly. Net 5, so that the transformer oil is accumulated in the first filter grid, until the transformer oil in the first filter grid reaches 100 liquid level parameter value, the controller 4 stops the solenoid valve 9, so that the transformer oil cannot be injected into the first filter grid. After the transformer oil passes through the filter screen 5, the overall liquid level of the transformer oil in the first filter grid decreases, and the controller 4 operates the telescopic device 7 in the first filter grid to place the foam 8 of the telescopic device 7 in the transformer oil, so that The liquid level in the first filter compartment is maintained at the 100 liquid level parameter value. When the first filter grid is lower than the liquid level of 50, the controller 4 resets the expansion device 7, opens the electromagnetic valve 9 connected between the filter box 1 and the classification box body 2, and injects the transformer oil in the classification box body 2 into the first filter grid. After the transformer oil is filtered, the liquid level in the first filter grid decreases as a whole, and the second filter grid rises, but due to the needs of transformer oil filtration, the transformer oil level in the first filter grid is always higher than the second transformer oil level . After the second filter grid, the overall liquid level of the transformer oil is lower than the first filter grid and higher than the third filter grid. When the transformer oil level in the second filter grid is higher than 80, the controller 4 will close the filter box 1 The connected solenoid valve 9 prevents the liquid level of the second filter grid from being too high, and the transformer oil in the second filter grid enters the third filter grid after passing through the fine filter screen 5 . After the liquid level of the second filter grid is lower than 50, the controller 4 operates the telescopic device 7 where the second filter grid is located to keep the liquid level in the second filter grid at 80. The third filter grid is the last filter grid, and the transformer oil entering the filter grid directly passes through the pipeline and is injected into the storage box 3 without filtering.

Finally, it should be noted that the combination of the above embodiments only illustrates the technical solution of the present invention rather than limiting it. Those of ordinary skill in the art should understand that those skilled in the art can modify or equivalently replace the specific embodiments of the present invention, but these modifications or changes are within the protection scope of the pending claims.

Claims (5)

1. A filter control device for transformer oil, characterized in that it comprises a plurality of filter boxes, a sorting box, a storage box and a controller, the inside of the filter box filters the inside of the filter box through a plurality of filter screens It is cut longitudinally to form a filter grid, and the filter screen is from left to right, and the aperture of the filter screen decreases successively. A liquid level detection sensor is installed on the top of each filter grid, and a pipe is installed on the rightmost filter grid. The storage boxes are connected, and the upper end of each filter grid is equipped with a telescopic device. The telescopic rod of the telescopic device is equipped with foam. Under the action of the telescopic device, the foam is placed in the transformer oil, so that the transformer oil in the filter grid As the liquid level rises, the pressure at the bottom of the transformer oil increases, increasing the flow of transformer oil filtered through the filter screen. The bottom of the classification box is connected to the filter grid on the left side of each filter box through multiple pipes. The pipe has an electromagnetic valve, the storage box is connected to the bottom of the filter grid on the far right side of the filter box through a pipeline; The telescopic device includes an electromagnetic telescopic device and a telescopic rod, wherein the telescopic rod is installed in the electromagnetic telescopic device, and the electromagnetic telescopic device has a power input terminal and a control terminal, the power input terminal is connected to the power supply through a connecting line, and the control terminal is connected to the The line is connected to the digital output module of the controller, so that the controller can automatically run the telescopic rod of the telescopic device to extend; There are three filter grids, and the three filter grids are the first filter grid, the second filter grid and the third filter grid from left to right. When setting the liquid level range value, the parameter value decreases from left to right as a whole; the controller Operate the solenoid valve connecting the filter box and the sorting box to inject the transformer oil in the sorting box into the first filter grid. Because there are impurities in the transformer oil, the transformer oil will slowly pass through the filter, so that the transformer oil will accumulate in the first filter grid. In the first filter grid, until the transformer oil in the first filter grid reaches 100 liquid level parameter value, the controller stops operating the solenoid valve, so that the transformer oil cannot be injected into the first filter grid; after the transformer oil passes through the filter screen, the first filter grid If the overall liquid level of the transformer oil drops, the controller will operate the telescopic device in the first filter grid, and place the foam of the telescopic device in the transformer oil, so that the liquid level in the first filter grid remains at 100 liquid level parameter value; When the liquid level of the first filter box is lower than 50, the controller resets the telescopic device, opens the solenoid valve connected to the filter box and the classification box, and injects the transformer oil in the classification box into the first filter box; after the transformer oil is filtered, the first The liquid level in the filter grid decreases as a whole, and the second filter grid rises, but due to the need for transformer oil filtration, the transformer oil level in the first filter grid is always higher than the second transformer oil level; the transformer oil in the second filter grid Finally, the overall liquid level is lower than the first filter grid and higher than the third filter grid. When the transformer oil level of the second filter grid is higher than 80, the controller closes the solenoid valve connected to the filter box to prevent the second filter grid from If the liquid level is too high, the transformer oil in the second filter grid will enter the third filter grid after passing through the fine filter; when the liquid level of the second filter grid is lower than 50, the controller will operate the telescopic device where the second filter grid is located, so that The liquid level in the second filter grid is kept at 80; the third filter grid is the last filter grid, and the transformer oil entering this filter grid is directly injected into the storage box through the pipeline without filtering. 2. A filter control device for transformer oil according to claim 1, wherein the controller includes an operation panel, a control chip, a digital output module, a signal detection module and a signal output module, and the The control chip is connected with the operation panel, the digital output module, the signal detection module and the signal output module. The operation panel has an operation interface, has operation buttons and can set parameters, and the digital output module is connected with the solenoid valve. The signal The detection module is connected with the liquid level detection sensor, and the signal output module is connected with the telescopic device. 3. A filter control device for transformer oil according to claim 2, wherein the liquid level detection sensor includes a detection port and a signal transmission port, and the detection port can detect the liquid level in each filter grid. The signal transmission port is connected to the signal detection module of the controller through a connection line, so that the controller can detect the parameter value in the liquid level sensor. 4. A filter control device for transformer oil according to claim 2, wherein the solenoid valve comprises a valve body and a solenoid coil, wherein the solenoid coil is mounted on the valve body, and by conducting the solenoid coil, Therefore, the valve body is operated, and the electromagnetic coil is connected with the digital output module of the controller through a connection line, so that the controller can automatically operate the electromagnetic valve. 5. A control method for transformer oil filter control equipment according to any one of claims 1 to 4, characterized in that: Step 1: Set the liquid level range value of transformer oil in each filter grid in each filter box in the controller, and place the transformer oil in the classification box; Step 2: Operate the solenoid valves in the pipeline at the bottom of the classification box through the controller, so that the transformer oil in the classification box is injected into the leftmost filter grid in the filter box, and the transformer oil is placed in the leftmost filter grid of the filter box; Step 3: When the transformer oil in the leftmost filter compartment reaches the upper limit of the liquid level range set by the controller, the controller closes the solenoid valve at the bottom of the sorting box to stop the transformer oil in the sorting box. into the filter box; Step 4: After the transformer oil in the leftmost filter grid is filtered from the filter screen, the overall liquid level drops, and the controller runs the expansion device at the position, so that the foam on the top of the expansion device is placed in the transformer oil, so that the liquid level of the transformer oil rises , reaching the upper limit of the liquid level of the filter grid set by the controller; Step 5: After the transformer oil in the filter grid on the far left of the filter box reaches the lower limit of the liquid level range set by the controller, the controller opens the solenoid valve at the bottom of the sorting box where it is located to make the transformer oil in the sorting box into the filter box; Step 6: After the transformer oil passes through the second filter grid, repeat steps 3 and 4 until the transformer oil reaches the rightmost filter grid of the filter box; Step 7: Transformer oil After the transformer oil reaches the filter grid on the far right side of the filter box, pour the filtered transformer oil into the storage box through the bottom pipe.

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