Device for detecting flow velocity of cooling oil of magnetic transformer

Abstract

The utility model discloses a magnetic type transformer cooling oil flow velocity detection device which comprises a first magnetic base, a data collector, a second magnetic base and an ultrasonic sensor, the first magnetic base is in magnetic connection with a transformer, the data collector is fixedly arranged on the first magnetic base, and the second magnetic base is fixedly arranged on the data collector. The first magnetic base is connected with the second magnetic base in a magnetic attraction mode, the ultrasonic sensor is fixedly arranged on the second magnetic base, and the ultrasonic sensor is in data connection with the data collector. Through the first magnetic base, the second magnetic base and the ultrasonic sensor which are detachable, non-contact measurement of the flow velocity of the cooling oil of the transformer is realized, normal operation of the transformer is not affected during detection, and the device is small in size and weight, can be mounted in a fin gap of the transformer, does not occupy too much space, and is convenient to use. And the device can be detached, so that detection requirements of different positions can be met.

Description

TECHNICAL FIELD

[0001] The utility model relates to transformer cooling oil flow rate detection technical field especially relates to a magnetic attraction type transformer cooling oil flow rate detection device. BACKGROUND

[0002] The transformer is important transmission equipment in the power system, can send the power signal of high voltage to each power equipment. However, the transformer will produce a large amount of heat in the operation process, lead to the temperature of transformer is too high, thereby influence the performance and life of transformer. At present, in order to make the transformer stable, efficient work, generally through the adoption of transformer cooler to the transformer heat dissipation. The main transformer cooler passes through cooling medium (such as air, oil or water) to absorb and dissipate the heat generated by the transformer, and the most common oil cooling type cooler is used at present. Oil cooling type cooler passes through the heat from the oil to the external environment, to keep the suitable working temperature of oil and prevent the mechanical component damage caused by overheating, and then uses cooling medium (usually water or air) and hot oil heat transfer. Cooling medium passes through the contact with hot oil, absorbs heat from the oil, and releases heat to the external environment through cooling equipment (for example radiator). In the cooler, oil and cooling medium flow through independent channels. The flow rate of oil is closely related to the insulation performance. If the oil flow rate is too fast, it can rub with the surface of the insulating part and generate electric charge on the surface of the insulating part and in the oil, when the local electric field intensity is too high, discharge phenomenon occurs, causes damage to the insulating part, and long-term accumulation effect can lead to insulation breakdown, thereby serious accidents occur. If the oil flow rate is too slow, it can affect the heat dissipation effect, lead to the temperature of transformer rises, and then affect the heat dissipation effect. Therefore, the transformer keeps the oil flow rate of cooler between 0.2 and 1.0 / s in the industry standard. Therefore, a device for detecting the oil flow rate of transformer cooler is needed to detect whether the oil flow rate is kept in the standard range in real time, and reduce accidents.

[0003] At present, the device for detecting transformer cooling oil generally adopts fixed installation mode to fix the detection device on the surface of the transformer or in the transformer. The fixed detection position can only detect a small range, if the detection position needs to be replaced, the original detection device needs to be disassembled or a new detection device needs to be installed, which brings inconvenience to replace the detection position, and part of the detection device needs to be disassembled after the transformer stops working, which increases the detection process and the burden of workers. UTILITY MODEL CONTENT

[0004] The utility model discloses a purpose at: in view of above -mentioned problem, provide a kind of magnetic transformer cooling oil flow rate detection device, by detachable first magnetic base, second magnetic base and ultrasonic sensor, the non-contact measurement of transformer cooling oil flow rate is realized, it will not affect transformer normal operation when detecting work, simultaneously, the device volume weight is small, can be installed position in the fin gap of transformer, do not occupy too much space, and can be disassembled, can satisfy the detection needs of different positions.

[0005] To realize the above-mentioned utility model purposes, the technical scheme adopted by the utility model is as follows:

[0006] According to an aspect of the present application, a magnetic transformer cooling oil flow rate detection device is provided, comprising a first magnetic base, a data collector, a second magnetic base and an ultrasonic sensor.

[0007] The first magnetic base is magnetically connected with the transformer.

[0008] The data collector is fixedly arranged on the first magnetic base.

[0009] The first magnetic base is magnetically connected with the second magnetic base.

[0010] The ultrasonic sensor is fixedly arranged on the second magnetic base.

[0011] The ultrasonic sensor is data-connected with the data collector.

[0012] Preferably, the first magnetic base comprises a first magnet, which is magnetically connected with the transformer and the second magnetic base respectively.

[0013] Preferably, the first magnetic base comprises a shell, a power supply, a current controller, a core and a coil, the power supply, the current controller, the core and the coil are arranged in the shell, the coil is wound outside the core, and the coil is electrically connected with the power supply through the current controller.

[0014] Preferably, the second magnetic base comprises a second magnet, which is magnetically connected with the first magnetic base.

[0015] Preferably, it further comprises a buzzer, which is arranged on the second magnetic base and data-connected with the data collector.

[0016] Preferably, it further comprises a flow rate display screen, which is arranged on the second magnetic base and data-connected with the data collector.

[0017] Preferably, the remote communication module is an NB-IoT module, a LoRa module or a 4G / 5G module.

[0018] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present application are:

[0019] The first magnetic base, the second magnetic base and the ultrasonic sensor are detachable, so that the non-contact measurement of the transformer cooling oil flow rate is realized, the normal operation of the transformer is not affected during the detection work, meanwhile, the device has small volume and weight, can be installed in the fin gap of the transformer, does not occupy too much space, can be disassembled, and can meet the detection requirements of different positions. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a structural schematic view of embodiment 1 of the present application;

[0021] Fig. 2 is a structural schematic view of embodiment 2 of the present application.

[0022] In the drawings, 1 is a first magnetic base, 2 is a data collector, 3 is a second magnetic base, 4 is an ultrasonic sensor, 5 is a cover, 6 is a remote communication module, 7 is a buzzer, 8 is a flow rate display screen, 9 is an outer shell, 10 is a power supply, 11 is a current controller, 12 is an iron core, and 13 is a coil. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the present application clearer, the following preferred embodiments are described with reference to the drawings, and the present application is further described in detail. However, it should be noted that many details in the description are only used to make the reader have a thorough understanding of one or more aspects of the present application, and the aspects of the present application can be realized without these specific details.

[0024] Please refer to Figs. 1-2 The present application provides a magnetic type transformer cooling oil flow rate detection device, and the technical scheme is as follows:

[0025] Embodiment 1

[0026] As Fig. 1As shown, a magnetic transformer cooling oil flow rate detection device, comprising a first magnetic base 1, a data collector 2, a second magnetic base 3 and an ultrasonic sensor 4. The first magnetic base 1 is magnetically attracted to the transformer, and the data collector 2 is fixedly arranged in the first magnetic base 1. The second magnetic base 3 is magnetically attracted to the first magnetic base 1, and the ultrasonic sensor 4 is fixedly arranged on the second magnetic base 3. The ultrasonic sensor 4 is used to detect the flow rate information of the transformer cooling oil and send the flow rate information to the data collector 2. The data collector 2 stores the flow rate information and can analyze the flow rate information. The first magnetic base 1 is detachably mounted on the transformer, and the second magnetic base 3 is detachably mounted on the first magnetic base 1, so that the installation position can be changed at any time, improving the convenience of installation. And the second magnetic base 3 can be changed in installation form relative to the first magnetic base 1, with high applicability.

[0027] Specifically, the first magnetic base 1 includes a first magnet. The first magnet includes a first magnetic attraction part in the shape of a cylinder and a second magnetic attraction part in the shape of a disc. One end of the first magnetic attraction part is integrated with the second magnetic attraction part. The first magnetic attraction part is magnetically attracted to the fins of the transformer, or according to actual measurement needs, it is magnetically attracted to a position with a smooth surface, no rust and good magnetic attraction effect. By using the principle of magnetic attraction, it is tightly adsorbed on the metal shell 9 near the fins or the radiator oil pipe of the transformer, so that the device can be removed at any time and detected without orientation limitation.

[0028] The data collector 2 is fixedly arranged in the first magnet, and the data collector 2 is in data connection with the ultrasonic sensor 4. The data collector 2 is used to receive the detection information of the ultrasonic sensor 4. The ultrasonic sensor 4 is a non-contact sensor. The oil flow velocity is calculated by measuring the phase difference caused by the time difference of the forward and reverse propagation of the transformer cooler oil flow, realizing non-contact measurement, and not affecting the normal operation of the transformer during detection.

[0029] The ultrasonic sensor 4 is fixedly arranged on the second magnetic base 3, and the second magnetic base 3 includes a second magnet. The lower end of the second magnet is magnetically connected with the first magnet. The second magnet is detachably magnetically connected with the first magnet, which is convenient for replacing the detection position, and the second magnet can change the installation form relative to the first magnet, which can adapt to various installation scenes and improve the applicability. The data collector 2 is installed in the first magnet, and the ultrasonic sensor 4 is installed on the second magnet. The signal collector is matched with the ultrasonic sensor 4, and the relative position of the installation can be adjusted, so that the signal collector can better receive the detection signal of the ultrasonic sensor 4. A cover 5 is fixedly arranged on the second magnet, and the ultrasonic sensor 4 is arranged in the cover 5. The cover 5 protects the ultrasonic sensor 4.

[0030] Further, in order to transmit the signal to the remote monitoring center, the remote communication module 6 is further included in the embodiment. The remote communication module 6 is fixedly arranged at the upper end of the shell 5. The remote communication module 6 is wirelessly connected with the data collector 2 by using WiFi or Bluetooth. The remote communication module 6 is connected with the remote monitoring center by using an NB-IoT module, a LoRa module or a 4G / 5G module. After the detection signal is collected by the data collector 2, the detection analysis result is sent to the remote monitoring center through the remote communication module 6, so that the staff can remotely monitor the flow rate of the transformer cooling oil and refer to the data for regular inspection.

[0031] Further, in order to timely inform the staff in the case of abnormal flow rate of the transformer cooling oil, the buzzer 7 is further included in the embodiment. The buzzer 7 is fixedly arranged at the upper end of the remote communication module 6 and is data-connected with the data collector 2. When the data collector 2 analyzes that the flow rate of the cooling oil is abnormal, the abnormal signal is sent to the buzzer 7. After receiving the abnormal signal, the buzzer 7 works to remind the staff that the flow rate of the transformer cooling oil is abnormal, so that the staff can quickly handle it.

[0032] Further, in order to facilitate the staff to check the flow rate of the transformer cooling oil at any time, the flow rate display screen 8 is further included in the embodiment. The flow rate display screen 8 is fixedly arranged on the side wall of the shell 5 and is data-connected with the data collector 2. The flow rate data of the insulating oil detected by the ultrasonic flowmeter is displayed in real time.

[0033] In use, first, the dust, oil stains and other impurities on the surface of the installation point are cleaned, the first magnetic base 1 is installed near the metal shell 9 installation point near the selected transformer cooling oil pipe, when the first magnetic base 1 approaches the metal shell 9, the magnetic attraction will automatically adsorb it on the shell 9. Then the second magnetic base 3 is close to the first magnetic base 1, and the second magnetic base 3 is adsorbed on the first magnetic base 1. After the device is firmly installed, the power switch 10 is turned on. The ultrasonic sensor 4 emits ultrasonic waves to the transformer cooler oil flow, which propagates in the forward and reverse directions of the oil flow. Due to the existence of the oil flow speed, the ultrasonic waves propagating in the forward and reverse directions will produce a time difference, and then cause a phase difference. By accurately measuring this phase difference, the oil flow speed data is calculated according to the pre-set algorithm. The data collector 2 collects the flow rate of the insulating oil in the oil tank in real time. The collected oil flow rate data is transmitted through the remote communication module 6 and transmitted to the remote monitoring center.

[0034] After the remote monitoring center receives the data, it immediately parses and stores the data. The system will sort the temperature data according to the time sequence, making it easy to view and analyze the temperature change trend later. When the system determines that the oil flow rate exceeds the standard range of 0.2 to 1.0 / s, it quickly sends a trigger signal to the buzzer alarm. After the buzzer alarm receives the signal, it starts the internal sound device and emits a continuous high-frequency alarm sound.

[0035] At the same time, the flow rate display screen 8 receives system instructions and turns on a bright red light. On the display screen, the current oil temperature value is clearly displayed in large font, accurate to one decimal place, and the "high oil flow rate" warning information is displayed in a prominent color (such as red flashing font).

[0036] Embodiment 2

[0037] As shown in Fig. 2 The embodiment discloses a magnetic transformer cooling oil flow rate detection device. Unlike the previous embodiment, the first magnetic base 1 in this embodiment includes a shell 9, a power supply 10, a current controller 11, a core 12, and a coil 13. The power supply 10, the current controller 11, the core 12, and the coil 13 are all arranged inside the shell 9. The coil 13 is wound around the outside of the core 12, and the coil 13 is electrically connected to the power supply 10 through the current controller 11. The power supply 10 provides current to the coil 13, and the energized coil 13 generates a magnetic field, making the core 12 an electromagnet with magnetic properties. Thus, it can be adsorbed on the metal shell 9 of the transformer. The current of the coil 13 can be adjusted through the current controller 11, thereby adjusting the adsorption capacity of the core 12 and improving the stability of adsorption. Simply turn on or turn off the power supply 10 to facilitate the installation and removal of the device, providing great convenience for the use of the device.

[0038] The above is only the preferred embodiment of the present application. It should be noted that for ordinary skilled persons in the technical field, without departing from the principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered within the scope of protection of the present application.

Claims

1. A magnetically attracted transformer cooling oil flow rate detection device, characterized in that, It includes a first magnetic base, a data acquisition unit, a second magnetic base, and an ultrasonic sensor; The first magnetic base is magnetically connected to the transformer; The data acquisition device is fixedly mounted on the first magnetic base; The first magnetic base and the second magnetic base are magnetically connected; The ultrasonic sensor is fixedly mounted on the second magnetic base; The ultrasonic sensor is connected to the data acquisition unit.

2. The magnetic transformer cooling oil flow rate detection device according to claim 1, characterized in that: The first magnetic base includes a first magnet, which is magnetically connected to the transformer and the second magnetic base respectively.

3. The magnetic transformer cooling oil flow rate detection device according to claim 1, characterized in that: The first magnetic base includes a housing, a power supply, a current controller, an iron core, and a coil. The power supply, the current controller, the iron core, and the coil are all disposed inside the housing. The coil is wound around the outside of the iron core and is electrically connected to the power supply through the current controller.

4. The magnetically attracted transformer cooling oil flow rate detection device according to claim 1, characterized in that: The second magnetic base includes a second magnet, which is magnetically connected to the first magnetic base.

5. The magnetic transformer cooling oil flow rate detection device according to claim 1, characterized in that: It also includes a buzzer, which is mounted on the second magnetic base and is connected to the data acquisition unit.

6. The magnetically attracted transformer cooling oil flow rate detection device according to claim 1, characterized in that: It also includes a flow rate display screen, which is mounted on the second magnetic base and is connected to the data acquisition device.

7. The magnetically attracted transformer cooling oil flow rate detection device according to claim 1, characterized in that: It also includes a remote communication module, which may be an NB-IoT module, a LoRa module, or a 4G / 5G module.

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