A gas relay checking device

Abstract

The utility model relates to power equipment inspection and detection technical field especially is involved in a kind of gas relay check device, including workbench, the workbench is used to place gas relay, gas relay both ends are respectively connected with oil inlet pipeline and oil return pipeline, the oil inlet pipeline and the oil return pipeline are respectively connected with oil inlet cylinder and oil return cylinder;Oil supply component, the oil supply component is installed on check box, and the oil supply component output end is connected with the oil inlet cylinder;Gas supply component, the gas supply component is installed on the check box, and the gas supply component output end is connected with the oil inlet cylinder;Oil return component, the oil return component import end is connected with the oil return cylinder;Control component, the control component is installed on the check box and is electrically connected with the oil supply component, the gas supply component, the oil return component and gas relay.The utility model is beneficial to the check of gas relay quickly, improves check efficiency.

Description

Technical Field

[0001] This utility model relates to the field of power equipment inspection and testing technology, and in particular to a gas relay calibration device. Background Technology

[0002] The gas relay is a core protection device for oil-immersed transformers, installed on the connecting pipe between the transformer tank and the oil conservator. Its main function is to monitor gas or oil flow surges caused by internal transformer faults and provide protection through trigger signals or direct tripping.

[0003] Gas relays, with their sensitive gas and oil flow detection mechanisms, serve as the first line of defense against internal transformer faults. After production, gas relays require calibration to dynamically align their actual performance with design parameters. Through systematic operations such as mechanical adjustments, environmental simulations, and data calibration, the risk of transformer failures due to protection device malfunctions can be minimized. Gas relay calibration mainly includes light gas activation, heavy gas activation, and sealing withstand voltage tests. Currently, these tests are performed separately on different equipment, resulting in low testing efficiency.

[0004] Therefore, those skilled in the art are dedicated to developing a gas relay calibration device that facilitates rapid calibration of gas relays and improves calibration efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a gas relay calibration device, which facilitates rapid calibration of gas relays and improves calibration efficiency.

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

[0007] A gas relay testing device, comprising

[0008] A workbench is provided for placing a gas relay. The gas relay is connected to an oil inlet pipe and an oil return pipe at both ends, and the oil inlet pipe and the oil return pipe are connected to an oil inlet cylinder and an oil return cylinder, respectively.

[0009] An oil supply assembly is installed on the calibration box, and the output end of the oil supply assembly is connected to the oil inlet cylinder;

[0010] An air supply assembly is installed on the calibration box, and the output end of the air supply assembly is connected to the oil inlet cylinder.

[0011] An oil return assembly, wherein the oil return cylinder is connected to the inlet end of the oil return assembly;

[0012] A control component is mounted on the calibration box and electrically connected to the oil supply component, the gas supply component, the oil return component, and the gas relay.

[0013] The advantages of adopting the above scheme are as follows: the oil inlet pipe and oil return pipe of the gas relay are connected to the oil inlet cylinder and oil return cylinder respectively through the workbench, and the oil inlet cylinder is connected to the oil supply component and the gas supply component at the same time, and the oil return cylinder is connected to the oil return component. With the centralized electrical connection control of the control component, it is possible to integrate the operation of different calibration items such as light gas action, heavy gas action and sealing pressure resistance test of the gas relay on one device. This avoids the problem of low detection efficiency caused by separate testing on different devices in the existing technology, greatly improves the efficiency of calibration work, and saves time and labor costs.

[0014] The oil supply assembly, gas supply assembly, and oil return assembly are all installed on the calibration box and are uniformly controlled by the control assembly. They can precisely control the oil supply, gas injection, and oil return process according to the calibration requirements, ensuring the accuracy and stability of various simulated working conditions during the calibration process. This allows the various performance parameters of the gas relay to be accurately tested and verified, ensuring the reliability and accuracy of the calibration results and effectively reducing the risk of protection failure of the gas relay in actual use due to calibration errors.

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

[0016] Furthermore, a liquid flow meter and a pressure gauge are installed on the oil inlet pipe, and both the liquid flow meter and the pressure gauge are electrically connected to the control component.

[0017] The beneficial effects of adopting the above-mentioned further solution are: by installing a liquid flow meter and a pressure gauge on the oil inlet pipeline and electrically connecting them to the control component, the flow and pressure data during the oil inlet process can be monitored accurately in real time. The control component can adjust the oil supply in a timely manner based on these data to ensure that the oil supply meets the standard requirements during the gas relay calibration, thereby improving the accuracy of the calibration, ensuring the reliability of the calibration results, and also helping to detect and handle abnormalities in the oil supply process in a timely manner.

[0018] Furthermore, the oil supply assembly includes an oil supply pump, the input end of which is connected to an oil storage tank, and the output end of which is connected to the oil inlet cylinder via an oil supply pipe, and a first control valve is installed on the oil supply pipe.

[0019] The advantages of adopting the above-mentioned further solution are: the oil supply pump can stably provide oil, meeting the oil supply required for gas relay calibration; the first control valve can adjust the oil supply or cut off the oil supply in a timely manner according to the calibration requirements, and the operation is simple.

[0020] Furthermore, the oil tank has a vent at the top and an ultrasonic generator is installed on the bottom side of the oil tank, and the ultrasonic generator is electrically connected to the control component.

[0021] The beneficial effect of adopting the above-mentioned further solution is that ultrasound is mainly used to eliminate air bubbles in the oil, thus avoiding the air bubbles from affecting the calibration effect of the gas relay.

[0022] Furthermore, the air supply assembly includes an air compressor, the output end of which is connected to an air cylinder, the air cylinder being connected to the oil inlet cylinder via an air supply pipe, and a gas flow meter and a second control valve being installed on the air supply pipe. Both the air compressor and the gas flow meter are electrically connected to the control assembly.

[0023] The beneficial effects of adopting the above-mentioned further solution are as follows: the gas supply component uses an air compressor to supply gas to the gas cylinder, and then the gas cylinder supplies gas to the oil inlet cylinder through the gas supply pipe. The gas flow meter and the second control valve on the gas supply pipe can accurately control the gas flow. The air compressor and the gas flow meter are electrically connected to the control component to achieve precise control of the gas supply process. It can simulate the gas flow under different working conditions, meet the strict requirements of gas flow for the verification items such as the heavy gas action of the gas relay, effectively improve the accuracy and reliability of the verification, and ensure that the gas relay can operate accurately under various gas surge conditions.

[0024] Furthermore, the oil return assembly includes an oil return pump, the input end of which is connected to the oil return cylinder, and the output end of which is connected to the oil storage tank via an oil return pipe. A third control valve is also installed between the oil return pump and the oil return cylinder, and the oil return pump is electrically connected to the control assembly.

[0025] The beneficial effects of adopting the above-mentioned further scheme are: the oil return assembly uses an oil return pump to transport the oil in the oil return cylinder back to the oil storage tank, and a third control valve is installed between the oil return pump and the oil return cylinder, which can stably control the oil return speed and oil return volume. The third control valve facilitates the adjustment and control of the oil return process, preventing the oil return from being too fast or too slow from having an adverse effect on the calibration.

[0026] Furthermore, the return oil cylinder is also connected to an oil drain pipe, the other end of which is connected to the return oil cylinder. A fourth control valve is installed on the oil drain pipe, and the height of the fourth control valve is lower than the height of the gas relay and higher than the height of the return oil cylinder.

[0027] The beneficial effects of adopting the above-mentioned further scheme are: the drain pipe facilitates the rapid discharge of oil from the return oil cylinder, simulating a large flow surge to verify the gas relay.

[0028] Furthermore, both the oil inlet cylinder and the oil return cylinder are made of transparent material.

[0029] The beneficial effects of adopting the above-mentioned further solution are: the oil inlet and return cylinders are made of transparent materials, which makes it convenient for operators to visually observe the oil flow, level changes and whether there are abnormal phenomena such as air bubbles, and facilitates timely detection of problems in the oil supply and return process.

[0030] Furthermore, a level gauge is also installed on the oil storage tank.

[0031] The beneficial effect of adopting the above-mentioned further solution is that the level gauge installed on the oil tank can monitor the oil level in the tank in real time. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of a gas relay calibration device according to a specific embodiment of this utility model;

[0033] Figure 2 This is a cross-sectional plan view of a specific embodiment of the gas relay testing device of this utility model.

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

[0035] 1. Workbench; 2. Gas relay; 3. Oil inlet pipe; 4. Oil return pipe; 5. Oil inlet cylinder; 6. Oil return cylinder; 7. Oil supply assembly; 8. Calibration box; 9. Air supply assembly; 10. Oil return assembly; 11. Control assembly; 12. Liquid flow meter; 13. Oil supply pump; 14. Oil tank; 15. Oil supply pipe; 16. First control valve; 17. Air compressor; 18. Gas cylinder; 19. Air supply pipe; 20. Second control valve; 21. Gas flow meter; 22. Oil return pump; 23. Third control valve; 24. Oil drain pipe; 25. Fourth control valve; 26. Liquid level gauge; 27. Ultrasonic generator; 28. Pressure gauge. 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 As shown, a gas relay calibration device includes...

[0042] Workbench 1 is used to place gas relay 2. Gas relay 2 is connected to oil inlet pipe 3 and oil return pipe 4 at both ends. Oil inlet pipe 3 and oil return pipe 4 are connected to oil inlet cylinder 5 and oil return cylinder 6 respectively. Oil inlet cylinder 5 and oil return cylinder 6 are both made of transparent material.

[0043] Oil supply assembly 7 is installed on calibration box 8, and the output end of oil supply assembly 7 is connected to oil inlet cylinder 5.

[0044] Air supply component 9 is installed on calibration box 8, and the output end of air supply component 9 is connected to oil inlet cylinder 5;

[0045] Oil return assembly 10, with an oil return cylinder 6 connected to its inlet end;

[0046] Control component 11 is installed on calibration box 8 and electrically connected to oil supply component 7, gas supply component 9, oil return component 10 and gas relay 2.

[0047] In this invention, the oil inlet pipe 3 and oil return pipe 4 of the gas relay 2 are connected to the oil inlet cylinder 5 and oil return cylinder 6 respectively via the workbench 1. The oil inlet cylinder 5 is also connected to the oil supply component 7 and the gas supply component 9, and the oil return cylinder 6 is connected to the oil return component 10. With the centralized electrical connection control of the control component 11, the gas relay 2 can be integrated into a single device to perform different verification items such as light gas action, heavy gas action, and sealing pressure resistance test. This avoids the problem of low detection efficiency caused by separate testing on different devices in the prior art, greatly improves the efficiency of the verification work, and saves time and labor costs.

[0048] like Figure 1 , Figure 2 As shown, in some embodiments, a liquid flow meter 12 and a pressure gauge 28 are installed on the oil inlet pipe 3. Both the liquid flow meter 12 and the pressure gauge 28 are electrically connected to the control component 11, which facilitates real-time and accurate monitoring of flow and pressure data during the oil inlet process. Based on this data, the control component 11 can adjust the oil supply in a timely manner to ensure that the oil supply meets the standard requirements when the gas relay 2 is calibrated, thereby improving the accuracy of the calibration and ensuring the reliability of the calibration results. Furthermore, when performing leakage calibration, the pressure can be read from the pressure gauge 28 to check whether the pressure has decreased, thus verifying the sealing effect.

[0049] like Figure 1 , Figure 2 As shown, in another embodiment, the oil supply assembly 7 includes an oil supply pump 13, which can be a variable pump. The input end of the oil supply pump 13 is connected to an oil storage tank 14, and the output end of the oil supply pump 13 is connected to the oil inlet cylinder 5 through an oil supply pipe 15. A first control valve 16 is installed on the oil supply pipe 15. The first control valve 16 can adjust the amount of oil supply or cut off the oil supply in a timely manner according to the calibration requirements. The first control valve 16 can be a ball valve or a butterfly valve.

[0050] The oil tank 14 is also equipped with a level gauge 26, which can monitor the oil level in the oil tank 14 in real time, allowing operators to replenish the oil immediately. The oil tank 14 has a vent at the top and an ultrasonic generator 27 is installed on the bottom. The ultrasonic generator 27 is electrically connected to the control component 11. By utilizing the cavitation and stirring effects of ultrasonic waves, the oil in the oil tank 14 can be fully mixed and homogenized to ensure that the oil has uniform properties. At the same time, the cavitation and stirring effects cause air bubbles in the oil to escape, avoiding the impact of a large number of air bubbles in the oil on the calibration.

[0051] In this embodiment, the air supply assembly 9 includes an air compressor 17, the output end of which is connected to a gas cylinder 18. The gas cylinder 18 is connected to the oil inlet cylinder 5 via an air supply pipe 19. A gas flow meter 21 and a second control valve 20 are installed on the air supply pipe 19. Both the air compressor 17 and the gas flow meter 21 are electrically connected to the control assembly 11. The second control valve 20 can be a butterfly valve or a ball valve to facilitate control of the rate at which gas is introduced into the oil inlet cylinder 5. The gas flow meter 21 is used to detect the flow rate of the gas introduced into the oil inlet cylinder 5.

[0052] like Figure 1 , Figure 2 As shown, in some embodiments, the oil return assembly 10 includes an oil return pump 22, which may also be a variable pump. The input end of the oil return pump 22 is connected to the oil return cylinder 6, and the output end of the oil return pump 22 is connected to the oil storage tank 14 through the oil return pipe. A third control valve 23 is also installed between the oil return pump 22 and the oil return cylinder 6. The third control valve 23 may be a butterfly valve or a ball valve. The oil return pump 22 is electrically connected to the control assembly 11.

[0053] The return oil cylinder 6 is also connected to the drain pipe 24, and the other end of the drain pipe 24 is connected to the return oil pipe. A fourth control valve 25 is installed on the drain pipe 24. The height of the fourth control valve 25 is lower than the height of the gas relay 2 and higher than the height of the return oil cylinder 6, so that the gas preferentially accumulates in the gas relay 2.

[0054] Example 2

[0055] The only difference between Example 2 and Example 1 is that Example 2 also includes an oil temperature regulating component and a calibration data recorder.

[0056] The oil temperature regulation component is installed on the calibration box 8, and its output is connected to the oil inlet cylinder 5. It includes a cooling unit, a heating unit, and a temperature sensor. The temperature sensor is located inside the oil inlet cylinder 5 and is connected to the control component 11. The cooling unit can cool down the oil when the temperature is too high, and the heating unit can heat up the oil when the temperature is too low, ensuring that the oil temperature entering the gas relay 2 is stable within the set range, simulating different working conditions and improving the accuracy of calibration.

[0057] The calibration data logger is connected to the control component 11 and automatically records key data during the calibration process, such as the values ​​of the liquid flow meter 12, pressure gauge 28, and gas flow meter 21, as well as the operating time and parameters of the gas relay 2. The recorded data is stored in the memory of the calibration box 8 and can be retrieved and analyzed at any time, facilitating subsequent evaluation of the performance of the gas relay 2 and the working status of the calibration device.

[0058] The working principle of this utility model includes the following steps:

[0059] S100. Place the gas relay 2 on the workbench 1 and connect the corresponding pipes and circuits;

[0060] S200. When performing light gas action verification, the control component 11 starts the air compressor 17, regulates the second control valve 20 to supply air to the oil inlet cylinder 5, the gas flow meter 21 monitors the flow rate, adjusts the second control valve 20, the gas enters the gas relay 2, simulates the fault gas surge, triggers the light gas action, and the control component 11 records the action parameters.

[0061] S300. During the heavy gas action verification, the control component 11 adjusts the oil supply pump 13 and opens the fourth control valve 25 to make the oil flow rate reach the set value and trigger the heavy gas action.

[0062] S400. Supply oil to the inlet cylinder 5 and the return cylinder 6. After reaching the test pressure, close all valves and maintain the pressure for a period of time. Detect the pressure drop through the pressure gauge 28 to monitor its sealing performance.

[0063] S500. After supplying oil to the inlet cylinder 5 and the return cylinder 6 to expel air, start the return oil pump 22 to create a vacuum in the gas relay 2. The pressure gauge 28 detects the vacuum level and triggers the gas relay 2 to operate.

[0064] S500. Simultaneously, an oil sample mixed with gas is introduced into the gas relay 2, and the opening of the first control valve 16 and the second control valve 20 are adjusted to regulate the amount of gas mixture, triggering the gas relay 2 to operate.

[0065] 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.

[0066] 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 gas relay checking device, characterized by: include Workbench (1), the workbench (1) is used to place gas relay (2), the gas relay (2) is connected to an oil inlet pipe (3) and an oil return pipe (4) at both ends, and the oil inlet pipe (3) and the oil return pipe (4) are connected to an oil inlet cylinder (5) and an oil return cylinder (6) respectively. Oil supply assembly (7), which is installed on calibration box (8), and the output end of oil supply assembly (7) is connected to oil inlet cylinder (5); An air supply assembly (9) is installed on the calibration box (8), and the output end of the air supply assembly (9) is connected to the oil inlet cylinder (5). Oil return assembly (10), the oil return cylinder (6) is connected to the inlet end of the oil return assembly (10); The control component (11) is installed on the calibration box (8) and electrically connected to the oil supply component (7), the gas supply component (9), the oil return component (10) and the gas relay (2).

2. The gas relay verification apparatus according to claim 1, characterized by: A liquid flow meter (12) and a pressure gauge (28) are installed on the oil inlet pipe (3), and the liquid flow meter (12) and the pressure gauge (28) are electrically connected to the control component (11).

3. The gas relay calibration device according to claim 1, characterized in that: The oil supply assembly (7) includes an oil supply pump (13), the input end of which is connected to an oil storage tank (14), and the output end of which is connected to the oil inlet cylinder (5) via an oil supply pipe (15). A first control valve (16) is installed on the oil supply pipe (15).

4. The gas relay calibration device according to claim 3, characterized in that: The oil tank (14) has a vent at the top and an ultrasonic generator (27) is installed on the bottom side of the oil tank (14). The ultrasonic generator (27) is electrically connected to the control component (11).

5. The gas relay calibration device according to claim 3, characterized in that: The air supply assembly (9) includes an air compressor (17), the output end of which is connected to a gas cylinder (18). The gas cylinder (18) is connected to the oil inlet cylinder (5) through an air supply pipe (19). A gas flow meter (21) and a second control valve (20) are installed on the air supply pipe (19). The air compressor (17) and the gas flow meter (21) are both electrically connected to the control assembly (11).

6. The gas relay calibration device according to claim 3, characterized in that: The oil return assembly (10) includes an oil return pump (22), the input end of which is connected to the oil return cylinder (6), and the output end of which is connected to the oil storage tank (14) through an oil return pipe. A third control valve (23) is also installed between the oil return pump (22) and the oil return cylinder (6). The oil return pump (22) is electrically connected to the control assembly (11).

7. The gas relay calibration device according to claim 6, characterized in that: The return oil cylinder (6) is also connected to an oil drain pipe (24), and the other end of the oil drain pipe (24) is connected to the return oil cylinder. A fourth control valve (25) is installed on the oil drain pipe (24), and the height of the fourth control valve (25) is lower than the height of the gas relay (2) and higher than the height of the return oil cylinder (6).

8. The gas relay calibration device according to claim 1, characterized in that: Both the oil inlet cylinder (5) and the oil return cylinder (6) are made of transparent material.

9. The gas relay calibration device according to claim 3, characterized in that: The oil tank (14) is also equipped with a level gauge (26).

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