Transformer oil-water separation and discharge device

Abstract

The present invention relates to the field of power equipment maintenance and provides a transformer oil-water separation and drainage device. The device includes a transformer oil pit and an oil-water separation chamber connected to the transformer oil pit. The oil-water separation chamber is equipped with a first sensor for collecting oil and water weight and a second sensor for collecting oil and water volume. The oil-water separation chamber is provided with a first pipe for draining oil or an oil-water mixture and a second pipe for draining water. The first sensor and the second sensor are both connected to a controller, which controls the opening of the first pipe or the second pipe based on the oil and water volume information collected by the second sensor and the oil and water weight information collected by the first sensor. This ensures that the transformer oil pit does not continuously store rainwater and also allows the oil and oil-water mixture to be processed in the event of an oil leak.

Description

Technical Field

[0001] The invention belongs to the field of power equipment maintenance, and in particular relates to a transformer oil-water separation and discharge device. Background Art

[0002] The transformer oil-water separation and discharge device is mainly aimed at the oil-water discharge problem encountered by the oil-immersed transformer, a core power equipment, during operation. At present, most transformers in China are installed outdoors, and the transformer oil pit is located at the bottom of the transformer body, which is also an open-air arrangement. The main function of the transformer oil pit is to contain the transformer oil and discharge it to the transformer accident oil collection well through the oil pipeline for storage when an accident occurs in the transformer. However, when it rains, it is inevitable to contain rainwater and eventually collect it in the transformer accident oil collection well. The most common situation in operation is that the accident oil collection well is full of rainwater. The rainwater in the transformer accident oil collection well needs to be discharged and treated later, but a large part of it may be mixed with the transformer oil, and then the staff will need to separate and discharge it again.

[0003] Therefore, research on a transformer oil-water separation and discharge device that can automatically separate the oil and water in the transformer oil pit and discharge the accumulated water in time is of great significance to the safe operation of the substation, reduction of operation and maintenance costs and environmental protection. Summary of the Invention

[0004] The object of the present invention is to provide a transformer oil-water separation and discharge device, which ensures timely determination of the oil and water in the transformer oil pit and their timely separation and discharge.

[0005] To achieve the above-mentioned object, the present invention adopts the following technical solution: a transformer oil-water separation and discharge device, comprising a transformer oil pit, and an oil-water separation chamber connected to the transformer oil pit, wherein a first sensor for collecting oil and water weight and a second sensor for collecting oil and water volume are provided in the oil-water separation chamber, and the oil-water separation chamber is provided with a first pipe for draining oil or oil-water mixture and a second pipe for draining water; the first sensor and the second sensor are both connected to a controller, and the controller controls the opening of the first pipe or the second pipe according to the oil and water volume information collected by the second sensor and the oil and water weight information collected by the first sensor.

[0006] Optionally, an oil-water primary separation chamber is provided between the transformer oil pit and the oil-water separation chamber, and the oil-water primary separation chamber includes a high water level area connected to the transformer oil pit and a low water level area connected to the oil-water separation chamber, a first baffle is provided at the upper part of the high water level area extending downward, and a second baffle is provided at the lower part of the low water level area extending upward, and the lower end of the first baffle is lower than the upper end of the second baffle; a liquid level relay connected to the controller is provided at the upper part of the high water level area, and the height of the liquid level relay is greater than the highest water level line of the low water level area.

[0007] Optionally, the first partition includes a vertical plate extending downward from the upper part of the high water level area, and an inclined plate is extended obliquely downward from the lower end of the vertical plate toward the upper end of the second partition.

[0008] Optionally, a filter chamber is provided between the transformer oil pit and the oil-water primary separation chamber, and a filter screen is provided in the filter chamber, which separates the filter chamber into an impurity area connected to the transformer oil pit and a clean area connected to the oil-water primary separation chamber.

[0009] Optionally, a container is provided in the oil-water separation chamber, and the first sensor is a weighing device provided below the container.

[0010] Optionally, a gas support rod is provided below the container, and the supporting force provided by the gas support rod is equal to the mass of the container.

[0011] Optionally, a corrugated section is provided around the upper end of the container, the upper end of the side wall of the low water level area extends toward the oil-water separation chamber, and the upper end of the corrugated section is connected to the upper end of the side wall of the low water level area.

[0012] Optionally, the second sensor is a liquid level sensor, and the liquid level sensor is arranged on the inner wall of the container.

[0013] Optionally, the water inlet ports of the first pipe and the second pipe are connected to the bottom of the container through two drain valves, and the drain valve includes a drain base connected to the water inlet port, and the circumference of the drain base is connected to the valve body through radial bars arranged at intervals. A sealing gasket is provided inside the valve body to form a sealing fit with the drain base, and a pull rod is provided on the sealing gasket. The controller is connected to a driving device, and the driving device drives the pull rod to move up and down along the inside of the valve body.

[0014] Optionally, the drain base of the drain valve connected to the first pipeline is also connected to the overflow pipe.

[0015] Compared with the prior art, the present application uses the different densities of water and oil. The controller can accurately determine whether there is oil, water, or an oil-water mixture in the oil-water separation chamber based on volume information and weight information. If it is water, the second pipe can be controlled to open to discharge it all into the natural environment. If it is oil or an oil-water mixture, the first pipe can be controlled to open to discharge it into the accident oil storage well, waiting for subsequent processing. This will ensure that the transformer oil pit will not always store rainwater. At the same time, when an oil leakage accident occurs in the transformer, the oil and oil-water mixture can also be processed. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the arrangement of the present invention;

[0017] Figure 2 This is a schematic diagram of the drain valve structure.

[0018] Reference numerals:

[0019] 1. Transformer oil pit; 2. Oil-water separation chamber; 21. First pipeline; 22. Second pipeline; 23. Container; 24. Gas support rod; 25. Corrugated section; 3. First sensor; 4. Second sensor; 5. Controller; 6. Drain valve; 61. Drain base; 62. Valve body; 63. Sealing gasket; 64. Pull rod; 65. Drive device; 66. Overflow pipe; 7. Oil-water primary separation chamber; 71. High water level area; 72. Low water level area; 73. First partition; 731. Vertical plate; 732. Inclined plate; 74. Second partition; 75. Liquid level relay; 8. Filter chamber; 81. Filter screen; 82. Impurity area; 83. Clean area. DETAILED DESCRIPTION

[0020] In order to more clearly understand the above-mentioned objects, features and advantages of the present invention, the present invention is further described in detail below with reference to the accompanying drawings and examples. It will be understood that the described embodiments are only some embodiments of the present invention, rather than all embodiments. The specific embodiments described herein are merely for explaining the present invention, rather than for limiting the present invention. All other embodiments obtained by those of ordinary skill in the art based on the described embodiments of the present invention are intended to fall within the scope of protection of the present invention.

[0021] like Figure 1As shown, an embodiment of the present invention provides a transformer oil-water separation and discharge device, which is provided with a second sensor 4 for determining the volume information of oil and water in the oil-water separation chamber 2, and a first sensor 3 for determining the weight information of oil and water in the oil-water separation chamber 2. The density of water is different from that of oil. When the set threshold of the second sensor 4 is reached, the controller 5 can accurately determine whether the oil-water separation chamber 2 contains oil, water, or an oil-water mixture based on the volume information and the weight information. If it is water, the second pipe 22 can be controlled to open to discharge it all into the natural environment. If it is oil or an oil-water mixture, the first pipe 21 can be controlled to open to discharge it into the accident oil storage well for subsequent processing. Of course, if the oil and water volume in the oil-water separation chamber 2 has not reached the set threshold, it proves that the oil and water in the transformer oil pit 1 are emptied at this time. After a period of time, the controller 5 determines whether the remaining liquid is oil, water, or an oil-water mixture and then completely discharges it.

[0022] The first sensor 3 can be a weighing sensor commonly used in the prior art. The weighing sensor detects the weight change of the oil-water separation chamber 2 to determine the weight information of the oil and water. The first sensor 3 can also be a pressure-sensitive sensor arranged at the bottom inner side of the oil-water separation chamber 2 to detect the weight information of the oil and water by pressure changes. Of course, those skilled in the art can also use other means to detect the weight information of the oil and water in the oil-water separation chamber 2; the second sensor 4 can be a liquid level sensor, and its model can be a T55 capacitive intelligent liquid level meter, or a flow meter can be set between the transformer oil pit 1 and the oil-water separation chamber 2 to detect the oil and water volume information in the oil-water separation chamber 2. Of course, those skilled in the art can also use other means to detect the oil and water volume information in the oil-water separation chamber 2.

[0023] The first pipe 21 is connected to the accident oil storage well for draining oil or oil-water mixture, and the second pipe 22 is connected to the natural environment only for draining water. When the set threshold is reached, the oil and water volume of the oil-water separation chamber 2 is V, and the first pipe 21 or the second pipe 22 is opened. The pipe is opened to drain the V volume of oil and water and then closed. However, when there is only one oil-water separation chamber 2, if it has previously reached the set threshold and is in the process of drainage, the transformer oil pit 1 may continue to enter the oil-water separation chamber 2 during the drainage period. At this time, the oil may be mixed with water and discharged together through the second pipe 22. In order to avoid the above situation, two oil-water separation chambers 2 can be set. When one of them reaches the set threshold, the controller 5 determines to drain water or drain oil or drain oil-water mixture, and the transformer oil pit 1 drains oil and water to the other oil-water separation chamber 2. In this way, there is no possibility of oil entering the previous oil-water separation chamber 2 during the drainage process.

[0024] Of course, if there is an oil-water mixture in the oil-water separation chamber 2, the controller 5 can also accurately determine the liquid level boundary between oil and water, so that the oil-water separation chamber 2 can first discharge a portion of water from the bottom, and then discharge the remaining oil-water mixture with less water content to the accident oil storage well. However, if it is an oil-water mixture, even if the water is drained first, a small amount of oil may be mixed in during the drainage. This solution can be implemented, but there are certain risks and it is not the preferred solution. Moreover, the capacity of the accident oil storage well is generally large enough to accommodate the oil-water mixture as much as possible, and try to ensure that the oil does not have the opportunity to be discharged. Then, the oil-water mixture in the accident oil storage well is uniformly and accurately separated and processed. The focus of this application is to temporarily drain the oil and water from the transformer oil pit 1 as soon as possible, and to drain the rainwater in the oil pit in time when it rains.

[0025] In some embodiments, as Figure 1 As shown, the principle of the oil-water primary separation chamber 7 is to set two high water level areas 71 and low water level areas 72 with different water level lines. When the transformer oil pit 1 is full of water or oil, when entering the oil-water primary separation chamber 7, the liquid levels of water or oil in the high water level area 71 and the low water level area 72 are consistent, and the water or oil flows directly into the oil-water separation chamber 2 from the upper end of the side wall of the low water level area 72. The controller 5 judges whether it is water or oil according to the volume and weight and then discharges it. At this time, there is no need to worry about oil entering the oil-water separation chamber 2 later during drainage; however, when the transformer oil pit 1 is an oil-water mixture, since the density of oil is smaller than that of water, the lower layer of the transformer oil pit 1 is water and the upper layer is oil. First, the water at the bottom flows into the high water level area 71, and the liquid levels of water in the high water level area 71 and the low water level area 72 are consistent. When entering the oil-water separation chamber 2 and being judged by the controller 5 to have reached the set threshold, the water is directly discharged first, and then the oil starts to enter. The oil will first be formed by the first partition 73 and the second partition 74 The structure is squeezed into the top of the high water level area 71. The liquid level height of the high water level area 71 will be greater than that of the low water level area 71. The liquid level relay 75 will detect the liquid level information, proving that the transformer oil pit 1 is now an oil-water mixture. Subsequently, the oil in the transformer oil pit 1 will continue to enter the oil-water primary separation chamber 7. Due to the low density of the oil, the oil will pass through the high water level area 71 and then flow into the oil-water separation chamber 2 through the upper end of the side wall of the low water level area 72. At this time, even if the oil-water separation chamber 2 is full of water, it should not be drained directly, because during the drainage process, the oil in the oil-water primary separation chamber 7 will continue to flow into the oil-water separation chamber 2. At this time, the drainage may be mixed with a certain amount of oil, which will affect the natural environment. Therefore, the oil-water separation chamber 2 should immediately switch its state and prepare to drain oil or oil-water mixture to the accident oil storage well. Therefore, the function of the oil-water primary separation chamber 7 is to pre-judge that the oil begins to enter the oil-water separation chamber 2 to avoid oil mixing when the oil-water separation chamber 2 is drained.

[0026] This embodiment eliminates the need for two oil-water separation chambers 2, as these would occupy a significant amount of space and require two pipelines to connect to the oil pit, as well as two sets of sensors. To avoid wasting resources, this embodiment utilizes a single primary oil-water separation chamber 7 separated by a partition and equipped with a single liquid level relay 75, enabling a pre-determined determination of the oil-water mixture. In this embodiment, liquid level relay 75 utilizes the JYB-714B model, though other models are readily available to those skilled in the art. The height of liquid level relay 75 is approximately 1.05 times the maximum water level of low water level zone 72, enabling detection of the initial entry of oil into primary oil-water separation chamber 7.

[0027] When the liquid level in the oil-water separation chamber 2 no longer changes, the controller 5 determines whether the remaining liquid is oil, water, or an oil-water mixture and then completely discharges it. If the controller 5 always determines that it is draining, there is no need to deliberately deal with the remaining water in the oil-water primary separation chamber 7. However, when the liquid level relay 75 detects the liquid level information, it proves that there must be oil leakage at this time. At this time, the transformer must have an oil leakage accident, so the staff will come to the site for inspection and maintenance. At this time, the oil and water in the oil-water primary separation chamber 7 can be drained, and the volume of the oil-water primary separation chamber 7 does not need to be set too large. Its main function is to detect oil in advance to avoid oil mixing when the oil-water separation chamber 2 is drained.

[0028] In some embodiments, as Figure 1 As shown, the first baffle 73 includes a vertical plate 731 extending downward from the upper portion of the high water level region 71. A sloping plate 732 extends obliquely downward from the lower end of the vertical plate 731 toward the upper end of the second baffle 74. This arrangement of the first baffle 73 facilitates the flow of oil along the sloping plate 732 into the upper portion of the high water level region 71 in the presence of water, thereby facilitating liquid level detection by the liquid level relay 75.

[0029] In some embodiments, as Figure 1 As shown, a filter chamber 8 is disposed between the transformer oil pit 1 and the primary oil-water separation chamber 7. A filter screen 81 is disposed within the filter chamber 8. The filter screen 81 divides the filter chamber 8 into an impurity zone 82 communicating with the transformer oil pit 1 and a clean zone 83 communicating with the primary oil-water separation chamber 7. The purpose of providing the filter chamber 8 is to filter large impurities from the discharged oil and water to prevent pipe blockage during subsequent operations. In some arrangements, the lower portion of the transformer oil pit 1 communicates with the upper portion of the filter chamber 8, the filter screen 81 is disposed in the middle portion of the filter chamber 8, and the lower portion of the filter chamber 8 communicates with the lower portion of the high water level zone 71.

[0030] In some embodiments, as Figure 1As shown, a container 23 is provided in the oil-water separation chamber 2, and the first sensor 3 is a weighing device disposed below the container 23. A gas support rod 24 is disposed below the container 23. The supporting force provided by the gas support rod 24 is equal to the mass of the container 23. The model of the gas support rod 24 can be XQB42.0-020-160, wherein the supporting force provided by the gas support rod 24 is equal to the weight of the container 23. When no oil or water enters the container 23, the gas support rod 24 supports the container 23 in a position flush with the upper surface of the first sensor 3, and the first sensor 3 does not operate at this time. When oil or water enters the container 23, the container 23 moves downward to contact the first sensor 3, and the first sensor 3 begins to collect information on the weight of the oil and water in the container 23. The purpose of providing the gas support rod 24 is to prevent the container 23 from constantly pressing on the first sensor 3, thereby extending the service life of the first sensor 3.

[0031] In some embodiments, as Figure 1 As shown, a corrugated section 25 is provided around the upper end of container 23. The upper end of the sidewall of low water level area 72 extends toward oil-water separation chamber 2, and the upper end of corrugated section 25 is connected to the upper end of the sidewall of low water level area 72. The function of corrugated section 25 is to provide a certain deformation margin for container 23. When oil and water enter container 23, container 23 moves downward, and corrugated section 25 begins to stretch, but it always remains connected to the sidewall of low water level area 72, allowing oil and water to continue to enter container 23.

[0032] In some embodiments, as Figure 1 and Figure 2As shown, the water inlet ports of the first pipe 21 and the second pipe 22 are connected to the bottom of the container 23 through two drain valves 6. The drain valve 6 includes a drain base 61 connected to the water inlet port. The circumference of the drain base 61 is connected to the valve body 62 through radial strips arranged at intervals. The interior of the valve body 62 is provided with a sealing gasket 63 that forms a sealing fit with the drain base 61. A pull rod 64 is provided on the sealing gasket 63. The controller 5 is connected to the driving device 65, and the driving device 65 drives the pull rod 64 to move up and down along the inside of the valve body 62. When the controller 5 determines to drain oil, water or oil-water mixture, it controls the driving device 65 to start working. The driving device 65 can choose to drive a motor or a telescopic cylinder to drive the pull rod 64 to work, so that the sealing gasket 63 is separated from the drainage base 61. At this time, the oil and water can be discharged from the first pipe 21 or the second pipe 22 through the gap between the corresponding diameter bars. It should be emphasized here that the drainage scheme is not limited to the above content. Other mechanisms can also be used to open the first pipe 21 or the second pipe 22 to drain the oil and water. One preferred scheme can use a commonly used toilet drain valve, but the commonly used toilet drain valve is provided with a full-drain switch and a half-drain switch. In this application, only the full-drain switch is used. The advantage of using a toilet drain valve is that after the driving device 65 presses the drain switch, the pull rod 64 will pull up the sealing gasket 63. As the liquid level gradually decreases, the sealing gasket 63 will fall back to form a sealing fit with the drainage base 61. There are already a large number of embodiments in the existing technology for the structure of the toilet drain valve, which will not be repeated here.

[0033] In some embodiments, the drain base 61 of the drain valve 6 connected to the first pipe 21 is also connected to the overflow pipe 66. The upper end of the overflow pipe 66 is higher than the set maximum oil and water drainage level of the container 23. Under normal circumstances, the controller 5 will determine that the oil and water volume reaches a certain threshold and will drain the oil and water. However, if the controller 5 fails, the oil and water drainage operation will not be performed. At this time, the liquid level in the container 23 will continue to rise. At this time, whether it is oil, water, or an oil-water mixture, it will be drained through the overflow pipe 66 through the drain base 61 on the first pipe 21. This is a safeguard solution. At the same time, an alarm can also be arranged on the overflow pipe 66. Once the alarm is activated, it proves that there is a problem with the controller 5 or the device of the present invention, resulting in the inability to achieve normal oil and water drainage. At this time, the staff will receive the signal from the alarm and perform maintenance and debugging.

[0034] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A transformer oil-water separation and discharge device, comprising a transformer oil pit (1), characterized in that: The utility model further comprises an oil-water separation chamber (2) in communication with the transformer oil pit (1), wherein a first sensor (3) for collecting the weight of oil and water and a second sensor (4) for collecting the volume of oil and water are provided in the oil-water separation chamber (2), and the oil-water separation chamber (2) is provided with a first pipe (21) for draining oil or oil-water mixture and a second pipe (22) for draining water; The first sensor (3) and the second sensor (4) are both connected to a controller (5), and the controller (5) controls the opening of the first pipeline (21) or the second pipeline (22) according to the oil and water volume information collected by the second sensor (4) and the oil and water weight information collected by the first sensor (3); An oil-water primary separation chamber (7) is provided between the transformer oil pit (1) and the oil-water separation chamber (2), the oil-water primary separation chamber (7) comprising a high water level area (71) in communication with the transformer oil pit (1) and a low water level area (72) in communication with the oil-water separation chamber (2), a first baffle (73) extending downwardly from the upper portion of the high water level area (71), a second baffle (74) extending upwardly from the lower portion of the low water level area (72), the lower end of the first baffle (73) being lower than the upper end of the second baffle (74); a liquid level relay (75) connected to the controller (5) being provided at the upper portion of the high water level area (71), the height of the liquid level relay (75) being greater than the highest water level line of the low water level area (72); The first partition (73) includes a vertical plate (731) extending downward from the upper part of the high water level area (71), and a slanted plate (732) extends obliquely downward from the lower end of the vertical plate (731) toward the upper end of the second partition (74).

2. The transformer oil-water separation and discharge device according to claim 1, characterized in that: A filter chamber (8) is provided between the transformer oil pit (1) and the oil-water primary separation chamber (7), and a filter screen (81) is provided in the filter chamber (8). The filter screen (81) separates the filter chamber (8) into an impurity zone (82) communicating with the transformer oil pit (1) and a clean zone (83) communicating with the oil-water primary separation chamber (7).

3. The transformer oil-water separation and discharge device according to claim 1, characterized in that: A container (23) is provided in the oil-water separation chamber (2), and the first sensor (3) is a weighing device provided below the container (23).

4. The transformer oil-water separation and discharge device according to claim 3, characterized in that: A gas support rod (24) is provided below the container (23), and the supporting force provided by the gas support rod (24) is equal to the mass of the container (23).

5. The transformer oil-water separation and discharge device according to claim 4, characterized in that: A corrugated section (25) is provided around the upper end of the container (23), the upper end of the side wall of the low water level area (72) extends toward the oil-water separation chamber (2), and the upper end of the corrugated section (25) is connected to the upper end of the side wall of the low water level area (72).

6. The transformer oil-water separation and discharge device according to claim 3, characterized in that: The second sensor (4) is a liquid level sensor, and the liquid level sensor is arranged on the inner wall of the container (23).

7. The transformer oil-water separation and discharge device according to claim 3, characterized in that: The water inlet ports of the first pipe (21) and the second pipe (22) are connected to the bottom of the container (23) through two drain valves (6). The drain valve (6) includes a drain base (61) connected to the water inlet port. The circumference of the drain base (61) is connected to the valve body (62) through radial strips arranged at intervals. A sealing gasket (63) is provided inside the valve body (62) to form a sealing fit with the drain base (61). A pull rod (64) is provided on the sealing gasket (63). The controller (5) is connected to a driving device (65). The driving device (65) drives the pull rod (64) to move up and down along the inside of the valve body (62).

8. The transformer oil-water separation and discharge device according to claim 7, characterized in that: The drainage base (61) of the drainage valve (6) connected to the first pipeline (21) is also connected to the overflow pipe (66).

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