Device for measuring dielectric loss and resistivity of insulating oil

Abstract

The utility model relates to the technical field of electronic detection instruments, in particular to an insulating oil dielectric loss and resistivity measuring device which comprises a measuring cup arranged in a measuring box. The defoaming assembly is mounted on the lower side of the measuring cup, and the defoaming assembly is electrically connected with the control module; the temperature control assembly is mounted on the side wall of the measuring cup, and the temperature control assembly is electrically connected with the control module; the humidity control assembly is mounted on the side wall of the measuring box, and the humidity control assembly is electrically connected with the control module; the integrated testing assembly is installed in the measuring box, the integrated testing assembly is electrically connected with the control module, a supply pump assembly is further installed between the integrated testing assembly and the measuring cup, and the supply pump assembly is electrically connected with the control module.

Description

Technical Field

[0001] This utility model relates to the field of electronic testing instrument technology, and in particular to a device for measuring the dielectric loss and resistivity of insulating oil. Background Technology

[0002] Insulating oil, as an important liquid insulating material, plays an irreplaceable role in power systems and many industrial fields. It is widely used in transformer insulation and heat dissipation, capacitor energy storage and dielectric strengthening, chemical equipment cooling and sealing, etc.

[0003] Dielectric loss, dielectric constant, and volume resistivity are three crucial indicators of insulating materials, and their compliance directly impacts the safety performance of electrical equipment. Dielectric loss reflects the efficiency of insulating oil in converting electrical energy into heat energy in an alternating electric field, while volume resistivity directly reflects the oil's ability to impede current flow. Dielectric loss and resistivity measurements are core methods for monitoring the performance of insulating oil, together forming a "double insurance" for the oil's insulating properties. Dynamic monitoring of these two indicators can effectively prevent equipment failures, extend service life, and provide a scientific basis for oil treatment. For example, a prior application with publication number CN222318944U discloses a fully automatic instrument for measuring the dielectric loss and resistivity of insulating oil. However, this measurement method does not consider the influence of air bubbles and environmental conditions. Insulating oil will contain air bubbles after a period of use, and the measurement of insulating oil requires a specific working environment; otherwise, the measurement will result in significant errors.

[0004] Therefore, those skilled in the art are dedicated to developing an instrument for measuring the dielectric loss and resistivity of insulating oil, reducing the impact of air bubbles and the testing environment on the performance testing of insulating oil, and improving measurement accuracy. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a device for measuring the dielectric loss and resistivity of insulating oil, reducing the influence of air bubbles and the testing environment on the performance testing of insulating oil, and improving the measurement accuracy.

[0006] The technical solution of this utility model to solve the above-mentioned technical problems is as follows:

[0007] An insulating oil dielectric loss and resistivity measuring device, comprising:

[0008] A measuring cup, which is placed inside the measuring box;

[0009] A defoaming component is installed on the lower side of the measuring cup and is electrically connected to the control module;

[0010] A temperature control component is mounted on the side wall of the measuring cup and is electrically connected to the control module.

[0011] A humidity control component is installed on the side wall of the measuring box and is electrically connected to the control module.

[0012] An integrated test assembly is installed inside the measuring chamber and is electrically connected to the control module. A supply pump assembly is also installed between the integrated test assembly and the measuring cup and is electrically connected to the control module.

[0013] The beneficial effects of adopting the above scheme are: by setting a defoaming component electrically connected to the control module on the lower side of the measuring cup, the air bubbles mixed in during the use of insulating oil can be effectively treated, reducing the impact of air bubbles on the measurement results, improving the accuracy of the measurement, and making the measurement of dielectric loss and resistivity of insulating oil closer to the true value, providing a more reliable basis for equipment condition assessment.

[0014] The temperature control component is installed on the side wall of the measuring cup and electrically connected to the control module. It can precisely regulate the temperature of the insulating oil in the measuring cup, ensuring that the oil is tested at a suitable and stable temperature, avoiding measurement errors caused by temperature fluctuations. The humidity control component is installed on the side wall of the measuring chamber and electrically connected to the control module. It can effectively control the humidity in the measuring environment, preventing excessively high or low humidity from adversely affecting the performance of the insulating oil and the measurement process, further improving measurement accuracy and ensuring the reliability of test results.

[0015] Based on the above technical solution, the present invention can be further improved as follows.

[0016] Furthermore, the defoaming component includes an ultrasonic generator, which is installed at the bottom of the measuring cup.

[0017] The beneficial effects of adopting the above-mentioned further scheme are: using an ultrasonic generator as a defoaming component, the cavitation effect of ultrasonic waves can effectively destroy the stability of bubbles, causing bubbles to break down rapidly and release gas, thereby achieving efficient removal of bubbles in insulating oil, further improving the accuracy of measurement, and making the measurement results of dielectric loss and resistivity of insulating oil more reliable.

[0018] By emitting ultrasonic waves into the insulating oil, it is also used to assist in heating and improve the heat transfer efficiency within the insulating oil, thus keeping the temperature of the insulating oil in the measuring cup constant throughout.

[0019] Furthermore, the temperature control component includes a heater mounted on the side wall of the measuring cup, and a precision temperature sensor is also mounted on the side wall of the measuring cup. The heater and the precision temperature sensor are electrically connected to the control module.

[0020] The advantages of adopting the above-mentioned further solution are as follows: the heater is installed on the side wall of the measuring cup, which can directly and uniformly heat the insulating oil inside the measuring cup, ensuring that the oil temperature quickly reaches the set value. At the same time, the equipped precision temperature sensor can monitor the oil temperature in real time and feed the temperature data back to the control module. The control module can accurately adjust the power of the heater according to the feedback information, realize precise control of the measurement environment temperature, provide stable temperature conditions for insulating oil performance testing, reduce measurement errors caused by temperature fluctuations, and improve the reliability of test results.

[0021] Furthermore, the temperature control component also includes a cooler, which is installed on the side wall of the measuring cup and is electrically connected to the control module.

[0022] The beneficial effects of adopting the above-mentioned further scheme are: adding a cooler to the temperature control component enables the device to have a cooling function, and working in conjunction with the heater, it can achieve bidirectional and precise control of the measurement environment temperature. This allows the measuring device to operate stably over a wider temperature range, adapting to the specific temperature conditions required for testing different seasons, regions, and oils, further improving the versatility and practicality of the device, and ensuring that the performance indicators of insulating oil can be accurately measured in various complex environments.

[0023] Furthermore, the humidity control component includes a dryer, which is installed on the side wall of the measuring chamber and is electrically connected to the control module.

[0024] The beneficial effects of adopting the above-mentioned further solution are as follows: The dryer is installed on the side wall of the measuring chamber, which can effectively control the ambient humidity inside the measuring chamber, remove moisture from the air, and prevent excessive humidity from causing the insulating oil to absorb moisture or generating other humidity-related interference factors during the measurement process. Through the electrical connection between the control module and the dryer, intelligent regulation of the dryer can be realized, accurately maintaining the humidity of the measuring environment within a suitable range, ensuring the stability and accuracy of the insulating oil performance test, and avoiding adverse effects of humidity fluctuations on the test results.

[0025] Furthermore, the supply pump assembly includes a peristaltic pump, the two ends of which are connected to the middle of the measuring cup and the integrated test assembly, respectively.

[0026] The beneficial effects of adopting the above-mentioned further solution are: the peristaltic pump, as a supply pump component, can ensure that the insulating oil is delivered from the measuring cup to the integrated test component at a stable flow rate, ensuring the continuity and stability of the test process, and helping to improve the repeatability and accuracy of the measurement. At the same time, the insulating oil after testing is discharged by reversing the peristaltic pump.

[0027] Furthermore, the measuring cup is also provided with a cup lid, and the cup lid has vent holes.

[0028] The beneficial effects of adopting the above-mentioned further solution are: the vent hole on the cup lid can ensure the air pressure balance inside and outside the measuring cup, avoid abnormal oil delivery or measurement error caused by air pressure difference, and will not affect the normal flow of internal gas due to complete sealing, which helps to maintain the stability of the measurement process and the reliability of the measurement results.

[0029] Furthermore, it also includes a battery assembly, which is electrically connected to the control module.

[0030] The advantages of adopting the above-mentioned further solution are: adding a battery pack and electrically connecting it to the control module provides the necessary power for the measuring device. Furthermore, in the event of a sudden power outage or when measurements need to be performed in an environment without external power, the battery pack can continuously power the device, ensuring that the measurement work is not affected and guaranteeing the integrity and continuity of the measurement data. In addition, the inclusion of a battery pack also improves the device's flexibility, enabling its application in more scenarios and further expanding its applicability. Attached Figure Description

[0031] Figure 1 This is a front view schematic diagram of the insulating oil dielectric loss and resistivity measuring device according to a specific embodiment of the present invention;

[0032] Figure 2 This is a side view of a specific embodiment of the insulating oil dielectric loss and resistivity measuring device of this utility model.

[0033] Figure 3 This is a cross-sectional planar structural schematic diagram of an insulating oil dielectric loss and resistivity measuring device according to a specific embodiment of this utility model.

[0034] The attached diagram lists the components represented by each number as follows:

[0035] 1. Measuring cup; 2. Measuring box; 3. Defoaming component; 4. Temperature control component; 5. Humidity control component; 6. Integrated testing component; 7. Supply pump component; 8. Ultrasonic generator; 9. Heater; 10. Precision temperature sensor; 11. Refrigerator; 12. Dryer; 13. Peristaltic pump; 14. Cup lid; 15. Battery assembly; 16. Control module. Detailed Implementation

[0036] The principles and features of this utility model are described below with reference to the accompanying drawings. The examples given are only for explaining this utility model and are not intended to limit the scope of this utility model.

[0037] In the description of this utility model, it should be understood that the terms "center", "length", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "inner", "outer", "circumferential", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the system or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0038] In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0039] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0040] Example 1

[0041] like Figure 1 , Figure 2 and Figure 3 As shown, an insulating oil dielectric loss and resistivity measuring device includes...

[0042] Measuring cup 1, which can be made of a metal cup with high thermal conductivity, is placed inside measuring box 2. Measuring cup 1 is also provided with a cup lid 14, and the cup lid 14 has a vent hole, which can prevent impurities from entering and cleverly balance the air pressure, thereby improving the detection accuracy of insulating oil performance.

[0043] Defoaming component 3 is installed on the lower side of measuring cup 1 and is electrically connected to control module 16;

[0044] Temperature control component 4 is installed on the side wall of measuring cup 1 and is electrically connected to control module 16;

[0045] Humidity control component 5 is installed on the side wall of measuring box 2 and is electrically connected to control module 16;

[0046] An integrated test component 6 is installed inside the measuring box 2 and is electrically connected to the control module 16. A supply pump component 7 is also installed between the integrated test component 6 and the measuring cup 1 and is electrically connected to the control module 16.

[0047] In this invention, all components are electrically connected to the control module 16, enabling intelligent automatic control of the entire device during operation. The control module 16 can precisely regulate the working states of the defoaming component 3, temperature control component 4, humidity control component 5, and supply pump component 7 according to preset programs and parameters. This achieves precise control over the measurement process, reduces errors and uncertainties caused by human operation, improves the repeatability and reproducibility of tests, and ensures good consistency and comparability of measurement results from different batches and at different times.

[0048] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, the defoaming component 3 includes an ultrasonic generator 8, which is installed at the bottom of the measuring cup 1. The subtle vibrations of the ultrasonic waves penetrate deep into the oil layer, causing the bubbles to escape quickly. At the same time, the ultrasonic waves are used to assist in heating the insulating oil and improve the heating uniformity of the insulating oil.

[0049] The temperature control component 4 includes a heater 9, which is mounted on the side wall of the measuring cup 1. A precision temperature sensor 10 is also mounted on the side wall of the measuring cup 1. The heater 9 and the precision temperature sensor 10 are electrically connected to the control module 16. The heater 9 and the precision temperature sensor 10 form a closed temperature control loop, ensuring a constant oil temperature inside the measuring cup 1, reducing external interference, and providing an ideal temperature field for measurement. The temperature control component 4 also includes a cooler 11, which is mounted on the side wall of the measuring cup 1 and is electrically connected to the control module 16.

[0050] In the specific measurement process, the insulating oil needs to be heated or cooled to 20°C for the first measurement, and then heated to 90°C for the second measurement. The quality of the insulating oil is judged by combining the first and second measurements.

[0051] In this embodiment, in order to reduce the influence of ambient humidity (the humidity should be below 5% during testing), a humidity control component 5 is also installed in the measuring chamber 2. Specifically, the humidity control component 5 includes a dryer 12, which is installed on the side wall of the measuring chamber 2 and electrically connected to the control module 16. The dryer 12 adsorbs the moisture in the measuring chamber 2 and precisely controls the humidity within a very narrow range to avoid the potential corrosion of the oil sample performance by moisture.

[0052] like Figure 1 , Figure 2 and Figure 3As shown, in this embodiment, the supply pump assembly 7 includes a peristaltic pump 13. The two ends of the peristaltic pump 13 are connected to the middle of the measuring cup 1 and the integrated testing assembly 6, respectively. The gentle squeezing action of the peristaltic pump 13 ensures that the oil sample is accurately delivered at a stable flow rate, protecting the oil sample quality from damage during delivery. Furthermore, reversing the peristaltic pump 13 allows the oil sample to be returned to the measuring cup 1 after testing. To ensure stable operation of the device under different working conditions, a battery assembly 15 is also included. The battery assembly 15 is electrically connected to the control module 16, providing the necessary power to the entire device.

[0053] The measuring box 2 includes a box body and a box cover. The box body and the box cover can be fastened together to form a sealed environment, which is conducive to sealing test.

[0054] Example 2

[0055] The difference between Embodiment 2 and Embodiment 1 lies solely in the addition of a visual operation screen on the outer wall of the measuring chamber 2. This screen is electrically connected to the control module 16 and features a touch-screen design with an intuitive and user-friendly interface. Users can set and adjust various parameters of the device through the screen, such as setting the measurement temperature, humidity, and defoaming time. Simultaneously, they can view real-time data and status information during the measurement process, such as the current oil temperature, humidity, defoaming progress, and real-time measured values ​​of dielectric loss and resistivity, thus achieving visualized and intelligent human-machine interaction.

[0056] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0057] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A device for measuring the dielectric loss and resistivity of insulating oil, characterized in that: include Measuring cup (1), which is placed inside measuring box (2); Defoaming component (3), which is installed on the lower side of the measuring cup (1) and is electrically connected to the control module (16); Temperature control component (4), the temperature control component (4) is installed on the side wall of the measuring cup (1), and the temperature control component (4) is electrically connected to the control module (16); Humidity control component (5), the humidity control component (5) is installed on the side wall of the measuring box (2), and the humidity control component (5) is electrically connected to the control module (16); An integrated test component (6) is installed inside the measuring box (2) and is electrically connected to the control module (16). A supply pump component (7) is also installed between the integrated test component (6) and the measuring cup (1) and is electrically connected to the control module (16).

2. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: The defoaming component (3) includes an ultrasonic generator (8) which is installed at the bottom of the measuring cup (1).

3. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: The temperature control component (4) includes a heater (9) which is installed on the side wall of the measuring cup (1). A precision temperature sensor (10) is also installed on the side wall of the measuring cup (1). The heater (9) and the precision temperature sensor (10) are electrically connected to the control module (16).

4. The insulating oil dielectric loss and resistivity measuring device according to claim 3, characterized in that: The temperature control component (4) also includes a cooler (11), which is installed on the side wall of the measuring cup (1) and is electrically connected to the control module (16).

5. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: The humidity control component (5) includes a dryer (12), which is installed on the side wall of the measuring box (2) and is electrically connected to the control module (16).

6. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: The supply pump assembly (7) includes a peristaltic pump (13), the two ends of which are connected to the middle of the measuring cup (1) and the integrated test assembly (6), respectively.

7. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: The measuring cup (1) is also provided with a cup lid (14), and the cup lid (14) has a vent hole.

8. The insulating oil dielectric loss and resistivity measuring device according to claim 1, characterized in that: It also includes a battery assembly (15) which is electrically connected to the control module (16).

Images