Automatic oil pressure adjusting device for transformer

Abstract

The invention provides a transformer oil pressure automatic adjusting device which comprises a diaphragm and a spring, the diaphragm is installed in the middle of a vertical part, and the spring is installed between the diaphragm and the top end face in the vertical part; the displacement sensor and the microcontroller are embedded in the top end of the interior of the vertical part, one side of the top end of the vertical part is connected with the second pipeline, and the temperature detector is installed at the open end of the second pipeline; the monitor is installed on any pipeline, the oil pressure of the pipeline is adjusted in a self-adaptive mode, the change trend of the oil pressure in the pipeline can be monitored and recorded for later adjustment, the temperature outside the pipeline can be monitored, and a data basis is provided for system regulation and control; the temperature difference inside and outside the pipeline, the temperature difference before and after the same part, the vibration frequency of the diaphragm and other conditions are adopted for autonomous judgment, manual one-to-one maintenance is directly reduced, direct judgment and result output are achieved, and regulation and control are achieved by manually operating the electromagnetic valve.

Description

Technical Field

[0001] The invention relates to an automatic transformer oil pressure regulating device, in particular to the technical field of transformers. Background Art

[0002] In large oil-immersed transformers, the oil in the transformer plays the role of insulation and heat dissipation. During production activities, the oil in the transformer will expand and contract as the oil temperature rises and falls, and the transformer may have leakage defects, which will cause the oil volume inside the transformer to change. In order to indicate the oil volume in the transformer, accidents caused by too much or too little oil in the transformer can be avoided.

[0003] In contrast, general large-scale hydraulic systems are equipped with oil pressure automatic monitoring systems, but the transformer oil pressure automatic monitoring system is also affected by the ambient temperature. For example, high or low temperature environments will cause drastic changes in pipeline pressure. If the heat dissipation conditions of the pipeline are not good, the hydraulic oil temperature will rise. Excessive oil temperature will reduce the viscosity of the hydraulic oil, increase leakage, and affect the life and performance of the hydraulic components. Therefore, most oil pressure automatic monitoring systems are also equipped with oil temperature monitoring functions, but the existing oil temperature monitoring systems simply measure the temperature difference at both ends of the pipeline or directly use temperature sensors for continuous monitoring. In fact, the increase in oil temperature is not only caused by environmental problems, but also by sudden changes in the transformer load. The oil temperature will also rise instantly. It can be restored by adjusting the transformer load, but this step requires manual review and proofreading, and it is impossible to monitor and check directly to output the results. The monitoring personnel need to monitor the transformer load one-to-one, which is troublesome and time-consuming.

[0004] To this end, the present invention provides a transformer oil pressure automatic regulating device with oil temperature detection function. 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 achieved in that:

[0007] A transformer oil pressure automatic regulating device, comprising an oil pressure gauge, an ammeter, a plurality of pipelines, and an oil tank, characterized in that it also comprises a monitor for detecting the temperature inside and outside the pipeline, wherein the monitor comprises a main body consisting of a horizontal part and a vertical part perpendicular to each other;

[0008] The oil inlet and the oil outlet are respectively arranged at two ends of the horizontal part;

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

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

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

[0012] As a further improvement, the metal sheet is formed by stacking two layers of metal sheets and welding them at the edge and the middle, and a plurality of positioning holes are opened on one of the metal sheets between the middle weld and the edge weld, which are distributed at equal distances and are used to fix the rubber diaphragm.

[0013] As a further improvement, the metal sheet is formed by bending a layer of metal sheet at the edge toward the center and then welding and fixing it, and a plurality of second positioning holes are opened in the bent portion of the metal sheet and are distributed at equal distances 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 pipeline is connected to the oil tank and the transformer at both ends, and 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, specifically comprises the following steps:

[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 it to the database of the monitoring platform through the HTTP protocol signal;

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

[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 IoT platform, and provides an API interface 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 API interfaces, and uses a chart library to display trend charts and dynamic charts.

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

[0025] In the microcontroller or application layer program, an initial threshold of the temperature difference between the inside and outside of the pipeline and an initial threshold of the temperature inside the pipeline are set, and the temperature data outside the pipeline and the temperature data inside the pipeline are compared to obtain the real-time temperature difference between the inside and outside of the pipeline;

[0026] 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 will adaptively adjust the pipeline pressure. It only needs to record the vibration frequency of the diaphragm and upload it to the database of the platform layer for later tracing;

[0027] 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.

[0028] The beneficial effects of the present invention are as follows: the present invention can install a monitor on any pipeline, and in addition to adaptively adjusting the pipeline oil pressure, it can also monitor and record the oil pressure change trend in the pipeline for later adjustment, and can also monitor the temperature outside the pipeline to provide a data basis for system control.

[0029] The present invention adopts 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 independent judgments, directly reducing manual one-to-one maintenance, directly judging, outputting the 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 drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 The invention provides a schematic diagram of the principle of a transformer oil pressure automatic regulation system.

[0032] Figure 2 The present invention is a schematic cross-sectional diagram of a monitor for a transformer oil pressure automatic regulating device provided in an embodiment of the present invention.

[0033] Figure 3 The present invention provides a schematic diagram of the diaphragm structure of a transformer oil pressure automatic regulating device according to an embodiment of the present invention.

[0034] Figure 4 The present invention provides a schematic diagram of the diaphragm structure of a transformer oil pressure automatic regulating device according to an embodiment of the present invention.

[0035] Figure 5 The invention provides a schematic diagram of a metal sheet structure of an automatic transformer oil pressure regulating device according to an embodiment of the present invention.

[0036] Figure 6 The present invention provides a schematic diagram of the diaphragm structure of a transformer oil pressure automatic regulating device according to an embodiment of the present invention.

[0037] Figure 7 The present invention provides a flowchart of an automatic monitoring system. DETAILED DESCRIPTION

[0038] In order to make the purpose, 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 in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the invention claimed for protection, but merely represents the selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0039] In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0040] Example 1

[0041] Reference Figure 1-Figure 5As shown, this embodiment provides a specific implementation method for a transformer oil pressure automatic regulating device, including an oil pressure gauge 10, an ammeter 20, a plurality of pipes 30, and an oil tank 40, characterized in that it also includes a monitor 50 for detecting the temperature inside and outside the pipe, wherein the monitor 50 includes a main body 501 composed of a horizontal portion 511 and a vertical portion 512 that are perpendicular to each other;

[0042] The oil inlet 502 and the oil outlet 503 are respectively arranged at the two ends of the horizontal portion 511 so as to be assembled on any one of the pipes 30 of the transformer oil pressure regulating system;

[0043] The diaphragm 504 and the spring 505 are installed in the middle of the vertical part 512, and the spring 505 is installed between the diaphragm 504 and the top end surface inside the vertical part 512. The diaphragm 504 is used 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 state, the spring 505 will cause the diaphragm 504 to return to its original state.

[0044] The displacement sensor 506, the second pipe 507, and the temperature detector 508 are embedded in the top of the vertical part 512. The second pipe 507 is connected to one side of the top of the vertical part 512. The temperature detector 508 is installed at the open end of the second pipe 507. The displacement sensor 506 is used to measure the frequency of the up and down vibration of the diaphragm 504, and then uploaded to the database to generate a trend table of the vibration frequency of the diaphragm 504. The faster the frequency of the diaphragm 504 vibration, the more unstable the transportation of the hydraulic oil in the pipeline. The larger the amplitude of the diaphragm 504, the higher the hydraulic oil pressure difference before and after the pipeline. It is easier to judge the change of the oil pressure in the pipeline, and the adaptive adjustment frequency of the pipeline oil pressure by the monitor 50 can be directly observed.

[0045] In this embodiment, 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 part of the vertical part 512, it faces the inner top of the vertical part 512.

[0046] The airbag diaphragm is composed of a metal sheet 541 and a rubber diaphragm 542. Once the rubber diaphragm 542 ruptures, the metal sheet 541 can still be used. The rubber diaphragm 542 deforms much faster than the metal sheet 541, and can quickly adapt to the oil pressure in the pipeline 30. It can respond promptly to slight changes in the oil pressure in the pipeline 30. Slight changes in the oil pressure are not enough to affect the normal use of the transformer. Only when the oil pressure in the pipeline 30 changes greatly will the metal sheet 541 be deformed and the displacement sensor 506 can measure the displacement.

[0047] In this embodiment, the metal sheet 541 is formed by stacking two layers of metal sheets and welding them at the edges 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, which are distributed at equal distances and are used to fix the rubber diaphragm 542. The first purpose is to increase the tightness of the connection between the metal sheet 541 and the rubber diaphragm 542, and the second purpose 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 coordinated vibration process.

[0048] In other embodiments, 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, and 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; 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 coordinated vibration process.

[0049] In this embodiment, the thickness of the diaphragm 504 is 0.2 mm-0.5 cm. Optimally, the thickness of the diaphragm 504 is 0.1 cm, which ensures that the diaphragm 504 can vibrate up and down and can be quickly reset.

[0050] In this embodiment, the pipeline 30 is connected to the oil tank 40 and the transformer at both ends, and 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, the present invention installs the monitor 50 on any pipeline 30, and can not only adaptively adjust the oil pressure of the pipeline 30, but also monitor and record the oil pressure change trend in the pipeline for later adjustment, and can also monitor the temperature outside the pipeline to provide a data basis for system control.

[0052] Example 2

[0053] See also Figure 1-5 As shown, the present embodiment is different from the first embodiment in that the diaphragm 504 is a metal diaphragm, and the thickness of the diaphragm 504 is 8 mm, which reduces the process troubles, and during the production process, the reaction is fast, the amplitude is fast, and the reset is also fast.

[0054] The effects achieved by this embodiment are the same as those of Embodiment 1. For structures, connection relationships and effects not mentioned, reference can be made to Embodiment 1.

[0055] Example 3

[0056] See also Figure 6As shown, the present embodiment is different from the first embodiment in that the diaphragm 504 is a rubber diaphragm, and the thickness of the diaphragm 504 is 25 mm, which reduces the process troubles, and has a rapid response, a fast amplitude, and a fast reset during the production process.

[0057] The effects achieved by this embodiment are the same as those of Embodiment 1. For structures, connection relationships and effects not mentioned, reference can be made to Embodiment 1.

[0058] Example 4

[0059] See also Figure 7 As shown, this embodiment provides a specific real-time method for an automatic monitoring system, based on the transformer oil pressure automatic adjustment device, and the specific steps include:

[0060] 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 the http protocol signal;

[0061] Step 2: Obtain the temperature data in 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 it to the database of the monitoring platform through the http protocol signal.

[0062] In the above technical solution, not only the http protocol but also the MQTT protocol can be used to send the acquired data to the platform layer through Wi-Fi or 4G or LoRaWAN or Bluetooth. Specifically, the microcontroller connects the displacement sensor, the temperature detector, and the second temperature detector, and reads the analog / digital signal through the GPIO, I²C or ADC interface; the sensor data is converted into JSON format and uploaded to the cloud or server, with short distance and fast transmission directions;

[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 data through the cloud platform layer and the IoT platform, and provides an API interface for the application layer to call data;

[0065] 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.

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

[0067] In the microcontroller or application layer program, the initial threshold of the temperature difference inside and outside the pipeline and the initial threshold of the temperature inside the pipeline are set, and the temperature data outside the pipeline and the temperature data inside the pipeline are compared to obtain the real-time temperature difference inside and outside the pipeline. The influence of the ambient temperature is removed in the form of temperature difference to ensure that the judgment in different environments is more accurate.

[0068] 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. It is only necessary 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 tracing;

[0069] 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.

[0070] In summary, the present invention uses 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 independent judgments, directly reducing manual one-to-one maintenance, directly judging, outputting the results, and manually operating the solenoid valve for regulation.

[0071] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. 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); 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).

2. The transformer oil pressure automatic regulating device according to claim 1, characterized in that: The structure of the diaphragm (504) comprises 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 by the 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).

3. The transformer oil pressure automatic regulating device according to claim 2, 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).

4. The transformer oil pressure automatic regulating device according to claim 2, 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).

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

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

7. 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).

8. The transformer oil pressure automatic regulating device according to claim 2, characterized in that: The thickness of the diaphragm (504) is 0.2 mm-0.5 cm.

9. An automatic monitoring system, characterized in that: The transformer oil pressure automatic regulating device according to any one of claims 1 to 8, wherein the specific steps include: 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.

10. An automatic monitoring system as claimed in claim 9, characterized in that: A threshold alarm processing module is included, and the threshold alarm processing module includes: In the microcontroller or application layer program, an initial threshold of the temperature difference between the inside and outside of the pipeline and an initial threshold of the temperature inside the pipeline are set, and the temperature data outside the pipeline and the temperature data inside the pipeline are compared to 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.

Images