An automatic transformer oil pressure regulating device

Abstract

The present invention provides an automatic transformer oil pressure regulating device, which includes a diaphragm and a spring. The diaphragm is installed at the middle part of the vertical part, and a spring is installed between the diaphragm and the inner top surface of the vertical part; a displacement sensor, a second pipeline, and a temperature detector. The displacement sensor and the microcontroller are embedded at the inner top of the vertical part. A second pipeline is connected to one side of the top of the vertical part, and the temperature detector is installed at the open end of the second pipeline. In addition to adaptively adjusting the oil pressure of the pipeline by installing the monitor on any pipeline, the present invention can also monitor and record the changing trend of the oil pressure in the pipeline for later adjustment, and can also monitor the temperature outside the pipeline to provide a data basis for system regulation. The present invention makes autonomous judgments based on conditions such as the temperature difference between the inside and outside of the pipeline, the temperature difference before and after at the same part, and the vibration frequency of the diaphragm, directly reducing the one-on-one manual inspection, directly making judgments, outputting results, and only requiring manual operation of the solenoid valve for regulation.

Description

Technical Field

[0001] The present invention relates to a transformer oil pressure automatic regulating device, and particularly relates to the technical field of transformers. Background Art

[0002] In large oil-immersed transformers, the oil in the transformer plays the roles of insulation and heat dissipation. During production activities, the oil in the transformer expands and contracts with the rise and fall of the oil temperature, and the transformer may have leakage defects, all of which will cause changes in the oil volume inside the transformer. In order to indicate the oil volume in the transformer and avoid accidents caused by too much or too little oil in the transformer.

[0003] In contrast, general large hydraulic systems are equipped with an oil pressure automatic monitoring system. However, the oil pressure automatic monitoring system of the transformer is also affected by the ambient temperature. For example, in high-temperature or low-temperature environments, the pipeline pressure will change violently. If the heat dissipation condition of the pipeline is not good, it will cause the temperature of the hydraulic oil to rise. Too high an oil temperature will reduce the viscosity of the hydraulic oil, increase the leakage amount, and at the same time affect the life and performance of the hydraulic components. Therefore, most oil pressure automatic monitoring systems are also equipped with an oil temperature monitoring function. However, existing oil temperature monitoring systems only simply measure the temperature difference between both ends of the pipeline or directly use the continuous monitoring of temperature sensors. In fact, the oil temperature rise is not only caused by environmental problems, but also may be caused by a sudden change in the transformer load, and the oil temperature will also rise instantly. As long as the transformer load is adjusted, it can be restored. However, this step requires manual review and verification and cannot independently monitor and check and directly output the result. The monitoring personnel need to monitor the load of the transformer one by one, which is troublesome and time-consuming.

[0004] In view of this, the present invention provides a transformer oil pressure automatic regulating device with oil temperature detection. Summary of the Invention

[0005] The present invention provides a transformer oil pressure automatic regulating device, which can effectively solve the above problems.

[0006] The present invention is implemented as follows:

[0007] A transformer oil pressure automatic regulating device includes an oil pressure gauge, an ammeter, several pipelines, and an oil tank. It is characterized in that it further includes a monitor for detecting the temperature inside and outside the pipeline. Among them, the monitor includes a main body composed of a horizontal part and a vertical part that are perpendicular to each other.

[0008] An oil inlet and an oil outlet are respectively arranged at both ends of the horizontal part;

[0009] A diaphragm and a spring, the diaphragm is installed in the middle part of the vertical part, and a spring is installed between the diaphragm and the top end surface inside the vertical part;

[0010] A displacement sensor, a second pipeline, and a temperature detector. The displacement sensor and the microcontroller are embedded at the top inside the vertical part. A second pipeline is connected to one side of the top of the vertical part, and the temperature detector is installed at the open end of the second pipeline.

[0011] As a further improvement, the structure of the diaphragm includes a metal thin sheet, a rubber diaphragm, and a sealing ring. After the metal thin sheet and the rubber diaphragm are stacked, the edges are wrapped and sealed with the sealing ring. And when the metal thin sheet is installed at the middle part of the vertical part, it faces the top inside the vertical part.

[0012] As a further improvement, the metal thin sheet is composed of two layers of metal sheets stacked and welded at the edges and the middle part. And a number of positioning holes are opened on one of the metal sheets between the middle weld and the edge weld, which are evenly distributed for fixing the rubber diaphragm.

[0013] As a further improvement, the metal thin sheet is bent from the edge to the center position at the edge and then welded and fixed. And a number of second positioning holes are opened at the bent part of the metal thin sheet, which are evenly distributed for fixing the rubber diaphragm.

[0014] As a further improvement, the diaphragm is a metal diaphragm.

[0015] As a further improvement, the diaphragm is a rubber diaphragm.

[0016] As a further improvement, the two ends of the pipeline are respectively connected to an oil tank and a transformer. An oil pressure gauge, an ammeter, a solenoid valve, and a second temperature detector are installed on the pipeline.

[0017] As a further improvement, the thickness of the diaphragm is 0.2 mm - 0.5 cm.

[0018] An automatic monitoring system, based on the transformer oil pressure automatic regulating device described above, the specific steps include:

[0019] Step 1: Install a monitor on the pipeline. Obtain the temperature data outside the pipeline and the vibration frequency of the diaphragm through the monitor, and transmit the signals to the database of the monitoring platform through the http protocol.

[0020] Step 2: Obtain the temperature data inside the pipeline through the second temperature detector on the pipeline; obtain the oil pressure data inside the pipeline through the ammeter, and transmit the signals to the database of the monitoring platform through the http protocol.

[0021] Step 3: The platform receives the temperature data outside the pipeline, the vibration frequency of the diaphragm, the oil pressure data inside the pipeline, and the temperature data inside the pipeline and stores them in the database.

[0022] Step 4: The platform layer processes data through the cloud platform layer and the Internet of Things platform, and provides API interfaces for the application layer to call data.

[0023] Step 5: The application layer includes mobile terminals and computer terminals. The application layer obtains real-time and historical data through the API interface, and uses a chart library to display trend charts and dynamic charts.

[0024] As a further improvement, it includes a threshold alarm processing module, and the threshold alarm processing module includes:

[0025] In the program of the microcontroller or the application layer, set the initial temperature difference threshold inside and outside the pipeline and the initial temperature threshold inside the pipeline, compare the temperature data outside the pipeline with the temperature data inside the pipeline, and obtain the real-time temperature difference inside and outside the pipeline.

[0026] When the temperature data inside the pipeline is greater than the initial temperature threshold, and when the real-time temperature difference is less than the initial temperature difference threshold, the diaphragm will adaptively adjust the pipeline pressure. Only need to record the vibration frequency of the diaphragm and upload the vibration frequency of the diaphragm to the database of the platform layer for later traceability.

[0027] When the temperature data inside the pipeline is greater than the initial temperature threshold and lasts for more than 10 minutes, then compare whether the real-time temperature difference is greater than the initial temperature difference threshold. If the real-time temperature difference is greater than the initial temperature difference threshold, combined with the suddenly increased current value of the transformer, it is concluded that the transformer connected to this pipeline is overloaded, and manual adjustment is directly carried out.

[0028] The beneficial effects of the present invention are: The present invention installs the monitor on any pipeline. In addition to adaptively adjusting the pipeline oil pressure, it can also monitor and record the changing trend of the oil pressure in the pipeline for later adjustment, and can also monitor the temperature outside the pipeline, providing a data basis for system regulation.

[0029] The present invention uses conditions such as the temperature difference inside and outside the pipeline, the temperature difference before and after at the same part, and the vibration frequency of the diaphragm to make autonomous judgments, directly reducing one-on-one manual inspections, directly making judgments, outputting results, and manually operating the solenoid valve for regulation. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a schematic diagram of the principle of a transformer oil pressure automatic regulation system provided by an embodiment of the present invention.

[0032] Figure 2 This is a schematic cross-sectional view of a monitor of an automatic transformer oil pressure regulating device provided by an embodiment of the present invention.

[0033] Figure 3 This is a schematic diagram of a diaphragm structure of an automatic transformer oil pressure regulating device provided by an embodiment of the present invention.

[0034] Figure 4 This is a schematic diagram of a diaphragm structure of an automatic transformer oil pressure regulating device provided by an embodiment of the present invention.

[0035] Figure 5 This is a schematic diagram of a metal sheet structure of an automatic transformer oil pressure regulating device provided by an embodiment of the present invention.

[0036] Figure 6 This is a schematic diagram of a diaphragm structure of an automatic transformer oil pressure regulating device provided by an embodiment of the present invention.

[0037] Figure 7 This is a flowchart of an automatic monitoring system provided by an embodiment of the present invention. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention. Therefore, the detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed present invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0039] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality of" means two or more unless otherwise specifically defined.

[0040] Embodiment 1

[0041] Refer to Figures 1 - 5As shown in the figure, this embodiment provides a specific implementation method for a transformer oil pressure automatic adjustment device, which includes an oil pressure gauge 10, an ammeter 20, several pipelines 30, and an oil tank 40. It is characterized in that it further includes a monitor 50 for detecting the temperature inside and outside the pipeline. Among them, the monitor 50 includes a main body 501 composed of a horizontal part 511 and a vertical part 512 that are perpendicular to each other.

[0042] An oil inlet 502 and an oil outlet 503 are respectively arranged at both ends of the horizontal part 511 to be assembled on any pipeline 30 of the transformer oil pressure adjustment system.

[0043] A diaphragm 504 and a spring 505. The diaphragm 504 is installed in the middle part of the vertical part 512, and a spring 505 is installed between the diaphragm 504 and the inner top surface of the vertical part 512. Using the diaphragm 504 as an adaptive adjustment medium for the oil pressure of the pipeline 30, it vibrates up and down with the change of the oil pressure of the pipeline 30. After the oil pressure of the pipeline 30 returns to a constant value, the spring 505 will prompt the diaphragm 504 to reset to its original position.

[0044] A displacement sensor 506, a second pipeline 507, and a temperature detector 508. The displacement sensor 506 and the microcontroller are embedded at the inner top of the vertical part 512. A second pipeline 507 is connected to one side of the top of the vertical part 512, and the temperature detector 508 is installed at the open end of the second pipeline 507. The displacement sensor 506 is used to specifically measure the vibration frequency of the diaphragm 504 up and down, and then upload it to the database to generate a trend table of the vibration frequency of the diaphragm 504. The faster the vibration frequency of the diaphragm 504, the more unstable the transmission of the hydraulic oil in the pipeline. The greater the amplitude of the diaphragm 504, the higher the pressure difference between the front and back hydraulic oils in the pipeline, and the easier it is to judge the change of the oil pressure in the pipeline. The adaptive adjustment frequency of the monitor 50 to the oil pressure of the pipeline can be directly observed.

[0045] In this embodiment, the structure of the diaphragm 504 includes a metal thin sheet 541, a rubber diaphragm 542, and a sealing ring 543. After the metal thin sheet 541 and the rubber diaphragm 542 are stacked, the edge is wrapped and sealed with the sealing ring 543. And when the metal thin sheet 541 is installed in the middle part of the vertical part 512, it faces the inner top of the vertical part 512.

[0046] A balloon-type diaphragm is formed by using the metal thin sheet 541 and the rubber diaphragm 542. Once the rubber diaphragm 542 is broken, the metal thin sheet 541 can still be used. The deformation speed of the rubber diaphragm 542 is much greater than that of the metal thin sheet 541, and it can quickly adapt to the oil pressure in the pipeline 30. For slight changes in the oil pressure of the pipeline 30, it can respond in a timely manner. The slight change in the oil pressure is not enough to affect the normal use of the transformer. Only when the change amplitude of the oil pressure in the pipeline 30 is large, the metal thin sheet 541 will deform and the displacement sensor 506 can measure the displacement.

[0047] In this embodiment, the metal sheet 541 is formed by stacking two metal sheets and welding them at the edges and the middle part. A number of positioning holes 541-1 are formed in one of the metal sheets between the middle weld and the edge weld, and are equally spaced for fixing the rubber diaphragm 542. One is to increase the tightness of the connection between the metal sheet 541 and the rubber diaphragm 542, and the other is to wrap the edge of the metal sheet 541 to prevent the metal sheet 541 from causing adverse effects on the rubber diaphragm 542 during the co-vibration process.

[0048] In other embodiments, the metal sheet 541 is bent from the edge to the center position of a single metal sheet and then welded and fixed. A number of second positioning holes are formed in the bent part of the metal sheet 541, and are equally spaced for fixing the rubber diaphragm 542; one is to increase the tightness of the connection between the metal sheet 541 and the rubber diaphragm 542, and the other is to wrap the edge of the metal sheet 541 to prevent the metal sheet 541 from causing adverse effects on the rubber diaphragm 542 during the co-vibration process.

[0049] In this embodiment, the thickness of the diaphragm 504 is 0.2 mm - 0.5 cm. Preferably, the thickness of the diaphragm 504 is 0.1 cm, ensuring that the diaphragm 504 can vibrate up and down and can quickly reset at the same time.

[0050] In this embodiment, the two ends of the pipeline 30 are respectively connected to the fuel tank 40 and the transformer. An oil pressure gauge 10, an ammeter 20, a solenoid valve, and a second temperature detector are installed on the pipeline 30.

[0051] In summary, in addition to adaptively adjusting the oil pressure of the pipeline 30 by installing the monitor 50 on any pipeline 30, the present invention can also monitor and record the change trend of the oil pressure in the pipeline for later adjustment, and can also monitor the temperature outside the pipeline, providing a data basis for system regulation.

[0052] Embodiment 2

[0053] See Figures 1 - 5 As shown, the difference between this embodiment and Embodiment 1 is that: the diaphragm 504 is a metal diaphragm, and the thickness of the diaphragm 504 is 8 mm, reducing the process trouble. During the production process, the reaction is rapid, the amplitude is fast, and the reset is also fast.

[0054] This embodiment achieves the same effect as Embodiment 1. For the structures, connection relationships, and effects not mentioned, reference can be made to Embodiment 1.

[0055] Embodiment 3

[0056] See Figure 6As shown, the difference between this embodiment and Embodiment 1 is that the diaphragm 504 is a rubber diaphragm, and the thickness of the diaphragm 504 is 25 mm, which reduces the process trouble. During the production process, the reaction is rapid, the amplitude is fast, and the reset is also fast.

[0057] This embodiment achieves the same effect as Embodiment 1. For the structures, connection relationships, and effects not mentioned, reference can be made to Embodiment 1.

[0058] Embodiment 4

[0059] See Figure 7 As shown, this embodiment provides a specific implementation method for an automatic monitoring system based on the transformer oil pressure automatic regulating device. The specific steps include:

[0060] Step 1: Install a monitor 50 on the pipeline 30. Obtain the temperature data outside the pipeline and the vibration frequency of the diaphragm 504 through the monitor 50, and transmit the signals to the database of the monitoring platform via the http protocol.

[0061] Step 2: Obtain the temperature data inside the pipeline through the second temperature detector on the pipeline 30; obtain the oil pressure data inside the pipeline through the ammeter 20, and transmit the signals to the database of the monitoring platform via the http protocol.

[0062] In the above technical solution, not only the http protocol but also the MQTT protocol, etc. can be used. The obtained data is sent to the platform layer via Wi-Fi or 4G or LoRaWAN or Bluetooth. Specifically, the microcontroller is connected to the displacement sensor, temperature detector, and second temperature detector, and reads analog / digital signals through GPIO, I²C, or ADC interfaces; converts the sensor data into JSON format and uploads it to the cloud or server for short-distance and fast transmission, etc.

[0063] Step 3: The platform receives the temperature data outside the pipeline, the vibration frequency of the diaphragm 504, the oil pressure data inside the pipeline, and the temperature data inside the pipeline and stores them in the database.

[0064] Step 4: The platform layer processes the data through the cloud platform layer and the Internet of Things platform, and provides an API interface for the application layer to call the data.

[0065] Step 5: The application layer includes mobile terminals and computer terminals. The application layer obtains real-time and historical data through the API interface and uses a chart library to display trend charts and dynamic charts.

[0066] The present invention further includes a threshold alarm processing module, and the threshold alarm processing module includes:

[0067] In the program of the microcontroller or the application layer, set the initial temperature difference threshold between the inside and outside of the pipeline and the initial temperature threshold inside the pipeline. Compare the temperature data outside the pipeline with the temperature data inside the pipeline to obtain the real-time temperature difference between the inside and outside of the pipeline. In the way of temperature difference, eliminate the influence of the ambient temperature to ensure that the judgment under different environments is relatively accurate.

[0068] When the temperature data inside the pipeline is greater than the initial temperature threshold, and when the real-time temperature difference is less than the initial temperature difference threshold, the diaphragm 504 will adaptively adjust the pipeline pressure. Only need to record the vibration frequency of the diaphragm 504 and upload the vibration frequency of the diaphragm 504 to the database of the platform layer for later traceability;

[0069] When the temperature data inside the pipeline is greater than the initial temperature threshold and lasts for more than 10 minutes, then compare whether the real-time temperature difference is greater than the initial temperature difference threshold. If the real-time temperature difference is greater than the initial temperature difference threshold, combined with the suddenly increased current value of the transformer, it is concluded that the transformer connected to this pipeline is overloaded and adjusted manually.

[0070] In summary, the present invention uses conditions such as the temperature difference between the inside and outside of the pipeline, the temperature difference before and after the same part, and the vibration frequency of the diaphragm to make an independent judgment, directly reduce the one-on-one manual maintenance, directly judge and output the result, and only need to manually operate the solenoid valve for regulation.

[0071] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A transformer oil pressure automatic regulating device, comprising an oil pressure gauge (10), an ammeter (20), a plurality of pipes (30), and an oil tank (40), characterized in that: Also included is a monitor (50) for detecting the temperature inside and outside the pipeline, wherein the monitor (50) comprises a main body (501) consisting of a horizontal portion (511) and a vertical portion (512) that are perpendicular to each other; The oil inlet (502) and the oil outlet (503) are respectively arranged at two ends of the horizontal portion (511); A diaphragm (504) and a spring (505), wherein the diaphragm (504) is installed in the middle of the vertical portion (512), and a spring (505) is installed between the diaphragm (504) and the inner top end surface of the vertical portion (512); A displacement sensor (506), a second pipe (507), and a temperature detector (508), wherein the displacement sensor (506) and the microcontroller are embedded in the top end of the vertical portion (512), the second pipe (507) is connected to one side of the top end of the vertical portion (512), and the temperature detector (508) is installed at the open end of the second pipe (507); The diaphragm (504) is a metal diaphragm or the structure of the diaphragm (504) includes a metal sheet (541), a rubber diaphragm (542) and a sealing ring (543); after the metal sheet (541) and the rubber diaphragm (542) are superimposed, the edges are wrapped and sealed with a sealing ring (543); and when the metal sheet (541) is installed in the middle of the vertical portion (512), it faces the inner top of the vertical portion (512).

2. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The metal sheet (541) is formed by stacking two layers of metal sheets and welding them at the edge and the middle, and a plurality of positioning holes (541-1) are opened on one of the metal sheets between the middle weld and the edge weld, and are distributed at equal distances for fixing the rubber diaphragm (542).

3. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The metal sheet (541) is formed by bending a layer of metal sheet at the edge toward the center and then welding and fixing it. A plurality of second positioning holes are opened in the bent portion of the metal sheet (541) and are distributed at equal distances for fixing the rubber diaphragm (542).

4. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The diaphragm (504) is a rubber diaphragm.

5. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The pipeline (30) is connected to an oil tank (40) and a transformer at both ends, respectively, and an oil pressure gauge (10), an ammeter (20), a solenoid valve, and a second temperature detector are installed on the pipeline (30).

6. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The thickness of the diaphragm (504) is 0.2 mm-0.5 cm.

7. An automatic monitoring system, characterized in that: The transformer oil pressure automatic regulating device according to any one of claims 1 to 6 comprises the following specific steps: Step 1: Install a monitor (50) on the pipeline (30), obtain temperature data outside the pipeline and the vibration frequency of the diaphragm (504) through the monitor (50), and transmit them to the database of the monitoring platform through an HTTP protocol signal; Step 2: Obtain temperature data in the pipeline through a second temperature detector on the pipeline (30); obtain oil pressure data inside the pipeline through an ammeter (20), and transmit the data to a database of a monitoring platform through an HTTP protocol signal; Step 3: The platform receives temperature data outside the pipeline, the vibration frequency of the diaphragm (504), the oil pressure data inside the pipeline, and the temperature data inside the pipeline and stores them in a database; Step 4: The platform layer processes data through the cloud platform layer and the IoT platform, and provides an API interface for the application layer to call data; Step 5: The application layer includes mobile terminals and computer terminals. The application layer obtains real-time and historical data through API interfaces, and uses a chart library to display trend charts and dynamic charts.

8. An automatic monitoring system as claimed in claim 7, characterized in that: A threshold alarm processing module is included, and the threshold alarm processing module includes: In the microcontroller or application layer program, set the initial threshold of the temperature difference between the inside and outside of the pipeline and the initial threshold of the temperature inside the pipeline, compare the temperature data outside the pipeline with the temperature data inside the pipeline, and obtain the real-time temperature difference between the inside and outside of the pipeline. When the temperature data in the pipeline is greater than the initial temperature threshold, and when the real-time temperature difference is less than the initial temperature difference threshold, the diaphragm (504) will adaptively adjust the pipeline pressure, and only the vibration frequency of the diaphragm (504) needs to be recorded and uploaded to the database of the platform layer for later tracing; When the temperature data in the pipeline is greater than the initial temperature threshold and lasts for more than 10 minutes, the real-time temperature difference is compared to see if it is greater than the initial temperature difference threshold. If the real-time temperature difference is greater than the initial temperature difference threshold, combined with the sudden increase in the current value of the transformer, it is concluded that the transformer load connected to this pipeline is too large and needs to be adjusted manually.

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