Oil-water monitoring device for generator

Abstract

The utility model relates to the technical field of generator monitoring, and discloses an oil-water monitoring device for a generator. The generator oil-water monitoring device comprises a tank body, and an oil injection test pipeline, an oil injection exhaust pipeline, an air pressure balance pipeline, an engine oil-water discharge pipeline and an oil-water discharge pipeline which are respectively communicated with the tank body, the oil injection test pipeline is used for injecting test oil-water into the tank body, and the oil injection exhaust pipeline is used for discharging gas in the tank body; the air pressure balancing pipeline is communicated with the generator gas chamber and used for balancing the air pressure of the tank body and the air pressure of the generator gas chamber, the engine oil-water discharging pipeline is used for discharging engine oil-water to the tank body, and the oil-water discharging pipeline is used for discharging oil-water in the tank body. Whether the oil-water monitoring function of the generator oil-water monitoring device is normal or not can be conveniently checked before use, oil in the gas chamber of the generator can also smoothly enter the tank body, and the alarm triggering function of the generator oil-water monitoring device cannot be influenced.

Description

Technical Field

[0001] The utility model relates to the technical field of generator monitoring, in particular to an oil-water monitoring device for a generator. Background Art

[0002] The water-hydrogen-hydrogen cooling method of a generator means that the stator winding is cooled by internal water cooling, the rotor winding is cooled by internal hydrogen cooling, and the iron core and other components are cooled by hydrogen surface cooling. This cooling method combines the good thermal conductivity of water and the high heat dissipation efficiency of hydrogen to improve the operating efficiency and safety of the generator.

[0003] For a generator adopting the water-hydrogen-hydrogen cooling method, the hydrogen in the generator hall is sealed by the sealing oil of the exciter end and the steam end of the generator through the sealing glands to ensure that the hydrogen does not leak out, and at the same time, the sealing oil will not enter the generator. The generator is equipped with an oil-water detector to monitor whether the generator is leaking oil. Reasons such as the differential pressure fluctuation of the generator's sealing oil, the excessive clearance of the sealing gland, and improper operation during operation will cause the sealing oil to enter the generator through the sealing gland. The oil-water detector of the generator will issue an alarm to remind the on-duty operator to drain the sealing oil that has entered the generator through the oil drain port at the bottom of the oil-water detector tank of the generator in time, and at the same time take measures to stop the oil from entering the generator. If the sealing oil that has entered the generator cannot be drained in time, it will lead to: the insulation of the generator is eroded, accelerating the insulation aging; the humidity inside the generator increases, reducing the gas breakdown strength, and in severe cases, it may cause serious consequences such as an interphase short circuit inside the generator.

[0004] The working principle of the oil-water detector of the generator is as follows: The sealing oil enters the generator through the sealing gland. The sealing oil that enters the generator will accumulate at the bottom of the generator under the action of gravity. In order to drain the sealing oil that has entered the generator in time, drain pipes are installed at the bottom of the generator (such as the bottom of the exciter end of the generator, the bottom of the steam end of the generator, the oil return expansion tank of the generator, etc.). The sealing oil that has entered the generator is drained to the oil-water detector tank of the generator through the drain pipe by gravity. After the oil-water detector tank detects the oil level, it will send an oil level alarm through analog quantity or send a switch quantity alarm through a connected relay contact.

[0005] The internal sealed gas of the existing oil-water detector tank of the generator cannot be discharged, the oil and water cannot be injected into the oil-water detector tank of the generator, and the oil injection test cannot be carried out, resulting in the inability to check whether the oil-water monitoring function is normal before use. When the oil in the gas chamber of the generator enters the oil-water detector tank of the generator, if the oil inflow is large in a short time, the sealed gas in the oil-water detector tank of the generator is compressed, resulting in an increase in the pressure inside the tank, and the oil in the gas chamber of the generator cannot be drained to the oil-water detector tank of the generator, and the alarm cannot be triggered. Summary of the Utility Model

[0006] Based on the above problems, the purpose of the present utility model is to provide a generator oil-water monitoring device, which can smoothly carry out the oil injection test, facilitate the inspection of whether the oil-water monitoring function is normal before use, and even if a large amount of oil enters the generator gas chamber in a short time, the oil in the generator gas chamber can smoothly enter the tank body without affecting the alarm function triggering of the generator oil-water monitoring device.

[0007] To achieve the above object, the present utility model adopts the following technical solutions:

[0008] The generator oil-water monitoring device includes a tank body and an oil injection test pipeline, an oil injection exhaust pipeline, a pressure balance pipeline, an engine oil-water discharge pipeline, and an oil-water discharge pipeline that are respectively communicated with the tank body. The oil injection test pipeline is used to inject test oil and water into the tank body. The oil injection exhaust pipeline is used to discharge the gas in the tank body. The pressure balance pipeline is communicated with the generator gas chamber, and the pressure balance pipeline is used to balance the pressure in the tank body and the pressure in the generator gas chamber. The engine oil-water discharge pipeline is used to discharge the engine oil and water to the tank body. The oil-water discharge pipeline is used to discharge the oil and water in the tank body.

[0009] As an optional solution of the generator oil-water monitoring device of the present utility model, the tank body is provided with a first interface and a second interface. The first interface is communicated with the oil injection test pipeline, and the second interface is communicated with the oil injection exhaust pipeline. The first interface is lower than the second interface.

[0010] As an optional solution of the generator oil-water monitoring device of the present utility model, the tank body is provided with a third interface. The third interface is communicated with the pressure balance pipeline. The third interface is higher than the first interface and lower than the second interface.

[0011] As an optional solution of the generator oil-water monitoring device of the present utility model, the tank body is provided with a fourth interface. The fourth interface is communicated with the engine oil-water discharge pipeline. The fourth interface is lower than the first interface.

[0012] As an optional solution of the generator oil-water monitoring device of the present utility model, the tank body is provided with a fifth interface. The fifth interface is communicated with the oil-water discharge pipeline. The fifth interface is lower than the fourth interface.

[0013] As an optional solution of the generator oil-water monitoring device of the present utility model, the oil injection test pipeline is provided with a first valve, the oil injection exhaust pipeline is provided with a second valve, the pressure balance pipeline is provided with a third valve, the engine oil-water discharge pipeline is provided with a fourth valve, and the oil-water discharge pipeline is provided with a fifth valve.

[0014] As an alternative solution of the generator oil-water monitoring device of the present utility model, the generator oil-water monitoring device further includes an alarm module, and when the oil in the generator gas chamber enters the tank body, the alarm module can emit an alarm signal.

[0015] As an alternative solution of the generator oil-water monitoring device of the present utility model, the alarm module is an alarm relay.

[0016] As an alternative solution of the generator oil-water monitoring device of the present utility model, a liquid level measurement module is arranged in the tank body, and the liquid level measurement module is used to measure the liquid level height of the tank body.

[0017] As an alternative solution of the generator oil-water monitoring device of the present utility model, the liquid level measurement module is a float liquid level gauge.

[0018] The beneficial effects of the present utility model are as follows:

[0019] The generator oil-water monitoring device provided by the present utility model injects test oil and water into the tank body through the oil injection test pipeline, and discharges the gas in the tank body through the oil injection exhaust pipeline, so that the oil injection test can be carried out smoothly, which is convenient to check whether the oil-water monitoring function of the generator oil-water monitoring device is normal before use. When the oil in the generator gas chamber enters, the oil flows to the generator oil-water monitoring device at the bottom of the generator under the action of gravity, and the engine oil and water are discharged to the tank body through the engine oil and water discharge pipeline, avoiding the accumulation of oil and water in the engine. Since the air pressure balance pipeline is connected to the generator gas chamber, the air pressure in the tank body and the air pressure in the generator gas chamber are balanced through the air pressure balance pipeline. Even if a large amount of oil enters the generator gas chamber in a short time, the oil in the generator gas chamber can still enter the tank body smoothly, and it will not affect the triggering of the alarm function of the generator oil-water monitoring device. The oil and water in the tank body are discharged through the oil and water discharge pipeline, so that the oil and water can be discharged out of the tank body smoothly, avoiding the retention of oil and water in the tank body and affecting the monitoring function. Description of the Drawings

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments of the present utility model. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the content of the embodiments of the present utility model and these drawings.

[0021] Figure 1 It is a structural schematic diagram of the generator oil-water monitoring device provided by the specific embodiment of the present utility model.

[0022] In the figure:

[0023] 1. Tank body; 11. First interface; 12. Second interface; 13. Third interface; 14. Fourth interface;

[0024] 15. Fifth interface; 16. Liquid level measurement module; 2. Oil injection test pipeline; 21. First valve; 3. Oil injection exhaust pipeline; 31. Second valve; 4. Air pressure balance pipeline; 41. Third valve; 5. Engine oil and water discharge pipeline; 51. Fourth valve; 6. Oil and water discharge pipeline; 61. Fifth valve; 7. Alarm module. Detailed implementation mode

[0025] To make the technical problems solved by the present utility model, the technical solutions adopted and the achieved technical effects clearer, the technical solutions of the embodiments of the present utility model will be further described in detail below with reference to the drawings. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present utility model.

[0026] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0027] In the description of the present utility model, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0028] Such as Figure 1As shown in the figure, this embodiment provides a generator oil and water monitoring device. The generator oil and water monitoring device includes a tank body 1, and an oil injection test pipeline 2, an oil injection exhaust pipeline 3, a pressure balance pipeline 4, an engine oil and water discharge pipeline 5, and an oil and water discharge pipeline 6 that are respectively connected to the tank body 1. The oil injection test pipeline 2 is used to inject test oil and water into the tank body 1. The oil injection exhaust pipeline 3 is used to discharge the gas in the tank body 1. The pressure balance pipeline 4 is connected to the generator gas chamber, and the pressure balance pipeline 4 is used to balance the pressure in the tank body 1 and the pressure in the generator gas chamber. The engine oil and water discharge pipeline 5 is used to discharge the engine oil and water into the tank body 1. The oil and water discharge pipeline 6 is used to discharge the oil and water in the tank body 1.

[0029] Inject test oil and water into the tank body 1 through the oil injection test pipeline 2, and discharge the gas in the tank body 1 through the oil injection exhaust pipeline 3, so that the oil injection test can be carried out smoothly, which is convenient to check whether the oil and water monitoring function of the generator oil and water monitoring device is normal before use. When the generator gas chamber is filled with oil, the oil flows to the generator oil and water monitoring device at the bottom of the generator under the action of gravity, and the engine oil and water are discharged into the tank body 1 through the engine oil and water discharge pipeline 5, avoiding the accumulation of oil and water in the engine. Since the pressure balance pipeline 4 is connected to the generator gas chamber, the pressure in the tank body 1 and the pressure in the generator gas chamber are balanced through the pressure balance pipeline 4. Even if a large amount of oil enters the generator gas chamber in a short time, the oil in the generator gas chamber can smoothly enter the tank body 1, and it will not affect the alarm function triggered by the generator oil and water monitoring device. The oil and water in the tank body 1 are discharged through the oil and water discharge pipeline 6, so that the oil and water can be smoothly discharged outside the tank body 1, avoiding the retention of oil and water in the tank body 1 and affecting the monitoring function.

[0030] Optionally, the tank body 1 is provided with a first interface 11 and a second interface 12. The first interface 11 is connected to the oil injection test pipeline 2, and the second interface 12 is connected to the oil injection exhaust pipeline 3. The first interface 11 is lower than the second interface 12.

[0031] Optionally, the tank body 1 is provided with a third interface 13. The third interface 13 is connected to the pressure balance pipeline 4. The third interface 13 is higher than the first interface 11 and lower than the second interface 12. The third interface 13 is close to the top of the tank body 1 to avoid affecting the oil injection test.

[0032] Optionally, the tank body 1 is provided with a fourth interface 14. The fourth interface 14 is connected to the engine oil and water discharge pipeline 5. The fourth interface 14 is lower than the first interface 11. The fourth interface 14 is located on the side wall of the tank body 1 and on the same side of the tank body 1 as the third interface 13 to avoid misoperation.

[0033] Optionally, the tank body 1 is provided with a fifth interface 15. The fifth interface 15 is connected to the oil and water discharge pipeline 6. The fifth interface 15 is lower than the fourth interface 14. The fifth interface 15 is located at the bottom of the tank body 1 to facilitate the discharge of the oil and water in the tank body 1.

[0034] To facilitate the control of the on / off states of each pipeline, optionally, a first valve 21 is provided in the oil injection test pipeline 2, a second valve 31 is provided in the oil injection exhaust pipeline 3, a third valve 41 is provided in the air pressure balance pipeline 4, a fourth valve 51 is provided in the engine oil and water discharge pipeline 5, and a fifth valve 61 is provided in the oil and water discharge pipeline 6. It can be understood that during the oil injection test, both the first valve 21 and the second valve 31 are opened, and the third valve 41, the fourth valve 51, and the fifth valve 61 are all closed. After the generator gas chamber is filled with oil, the oil flows under the action of gravity to the generator oil and water monitoring device at the bottom of the generator, and both the first valve 21 and the second valve 31 are closed, while the third valve 41, the fourth valve 51, and the fifth valve 61 are all opened.

[0035] To facilitate the issuance of an alarm signal after detecting the entry of oil and water into the generator gas chamber, optionally, the generator oil and water monitoring device further includes an alarm module 7. When the oil in the generator gas chamber enters the tank body 1, the alarm module 7 can issue an alarm signal. The alarm signal can be in the form of a beeping sound, voice prompt, or other signal methods.

[0036] Optionally, the alarm module 7 is an alarm relay. The working principle of the alarm relay is based on the electromagnetic induction phenomenon, and it changes the on / off state of a large current by controlling the on / off of a small current. When the current passing through the coil generates a magnetic field through electromagnetic induction, this magnetic field will attract or release the contact, thereby achieving the on / off control of the circuit. In the alarm relay, this principle is applied to support the alarm device, and its working principle is relatively simple: when the circuit is connected, if the broken wire L is connected, it will cause V1 to saturate and V2 to cut off, and the relay J will not be powered on, and the alarm circuit will not work. After the broken wire L is disconnected, V1 cuts off, causing V2 to saturate, and the relay I is powered on, and the normally open contact K1 closes (and the normally closed contact K2 opens), and the alarm circuit works and issues an alarm. If the broken wire is connected again, since V1 cannot obtain the base bias current, the circuit will maintain the state of V1 cut off and V2 saturated, realizing the self-locking function of the alarm circuit. This design enables the alarm relay to automatically start the alarm mechanism under specific conditions, improving safety and convenience.

[0037] For the convenience of detecting the liquid level height in the tank body 1, optionally, a liquid level measurement module 16 is provided in the tank body 1, and the liquid level measurement module 16 is used to measure the liquid level height of the tank body 1. The liquid level measurement module 16 mainly includes a capacitive liquid level gauge, an ultrasonic liquid level gauge, an electric contact liquid level gauge, etc. The capacitive liquid level gauge measures the liquid level by using the change of capacitance, and usually consists of three parts: a sensor, a converter and an indicator. The liquid level gauge with a control function also has a setting mechanism. The ultrasonic liquid level gauge is based on the time-of-flight principle and calculates the height of the liquid level by measuring the time from the emission to the reflection of the ultrasonic pulse. The electric contact liquid level gauge, on the other hand, works by electrical contact. When the liquid level reaches the preset height, the contact point changes, thereby triggering the corresponding control or alarm device. In addition, the liquid level measurement principles also include various methods such as buoyancy measurement, float measurement, float and cable measurement, pressure measurement, ultrasonic measurement, microwave measurement, gamma ray measurement, capacitance measurement and conductivity measurement. These principles are applied to different types of liquid level gauges to meet the requirements of different application scenarios.

[0038] Optionally, the liquid level measurement module 16 is a float type liquid level gauge. The float type liquid level gauge mainly consists of a float and a sensor. The float is installed at the top of the container through a connecting flange and floats on the liquid surface according to the principle of equal displaced liquid volume. When the liquid level in the container changes, the float will also move up and down accordingly. The float is internally provided with a magnet. When the float moves, the magnet inside it interacts with the magnetic reed switch in the sensor, causing the number of elements connected in series in the circuit to change, and further causing the electrical quantity of the instrument circuit system to change. Specifically, this change reflects the liquid level situation in the container by detecting the change of the electrical quantity.

[0039] The generator oil-water monitoring device provided in this embodiment injects test oil-water into the tank body 1 through the oil injection test pipeline 2, and discharges the gas in the tank body 1 through the oil injection exhaust pipeline 3, so that the oil injection test can be carried out smoothly, which is convenient to check whether the oil-water monitoring function of the generator oil-water monitoring device is normal before use. When the generator gas chamber is filled with oil, the oil flows to the generator oil-water monitoring device at the bottom of the generator under the action of gravity, and discharges the engine oil-water to the tank body 1 through the engine oil-water discharge pipeline 5, avoiding the accumulation of oil-water in the engine. Since the air pressure balance pipeline 4 is connected to the generator gas chamber, the air pressure in the tank body 1 and the air pressure in the generator gas chamber are balanced through the air pressure balance pipeline 4. Even if a large amount of oil enters the generator gas chamber in a short time, the oil in the generator gas chamber can smoothly enter the tank body 1, and it will not affect the triggering of the alarm function of the generator oil-water monitoring device. The oil-water in the tank body 1 is discharged through the oil-water discharge pipeline 6, so that the oil-water can be smoothly discharged outside the tank body 1, avoiding the retention of oil-water in the tank body 1 and affecting the monitoring function.

[0040] Note that the above is only a preferred embodiment of the present utility model and the technical principles applied. Those skilled in the art will understand that the present utility model is not limited to the specific embodiments here, and various obvious changes, re-adjustments and substitutions can be made by those skilled in the art without departing from the protection scope of the present utility model. Therefore, although the present utility model has been described in more detail through the above embodiments, the present utility model is not limited to the above embodiments only. Without departing from the concept of the present utility model, it may also include more other equivalent embodiments, and the scope of the present utility model is determined by the scope of the appended claims.

Claims

1. Generator oil-water monitoring device, characterized in that It includes a tank body (1), as well as an oil injection test pipeline (2), an oil injection exhaust pipeline (3), a pneumatic balance pipeline (4), an engine oil and water discharge pipeline (5), and an oil and water discharge pipeline (6) that are respectively connected to the tank body (1). The oil injection test pipeline (2) is used to inject test oil and water into the tank body (1), the oil injection exhaust pipeline (3) is used to discharge the gas in the tank body (1), the pneumatic balance pipeline (4) is connected to the generator gas chamber, and the pneumatic balance pipeline (4) is used to balance the air pressure in the tank body (1) and the air pressure in the generator gas chamber. The engine oil and water discharge pipeline (5) is used to discharge engine oil and water into the tank body (1), and the oil and water discharge pipeline (6) is used to discharge the oil and water in the tank body (1).

2. The generator oil-water monitoring device according to claim 1, characterized in that, The tank body (1) is provided with a first interface (11) and a second interface (12). The first interface (11) is connected to the oil injection test pipeline (2), the second interface (12) is connected to the oil injection exhaust pipeline (3), and the first interface (11) is lower than the second interface (12).

3. The generator oil-water monitoring device according to claim 2, characterized in that, The tank body (1) is provided with a third interface (13). The third interface (13) is connected to the pneumatic balance pipeline (4), and the third interface (13) is higher than the first interface (11) and lower than the second interface (12).

4. The generator oil-water monitoring device according to claim 2, characterized in that, The tank body (1) is provided with a fourth interface (14). The fourth interface (14) is connected to the engine oil and water discharge pipeline (5), and the fourth interface (14) is lower than the first interface (11).

5. The generator oil-water monitoring device according to claim 4, characterized in that, The tank body (1) is provided with a fifth interface (15). The fifth interface (15) is connected to the oil and water discharge pipeline (6), and the fifth interface (15) is lower than the fourth interface (14).

6. The generator oil-water monitoring device according to claim 1, wherein The oil injection test pipeline (2) is provided with a first valve (21), the oil injection exhaust pipeline (3) is provided with a second valve (31), the pneumatic balance pipeline (4) is provided with a third valve (41), the engine oil and water discharge pipeline (5) is provided with a fourth valve (51), and the oil and water discharge pipeline (6) is provided with a fifth valve (61).

7. The generator oil-water monitoring device according to claim 1, characterized in that, The generator oil and water monitoring device further includes an alarm module (7). When the oil in the generator gas chamber enters the tank body (1), the alarm module (7) can emit an alarm signal.

8. The generator oil-water monitoring device according to claim 7, wherein, The alarm module (7) is an alarm relay.

9. The generator oil-water monitoring device according to claim 1, wherein A liquid level measurement module (16) is arranged in the tank body (1), and the liquid level measurement module (16) is used to measure the liquid level height of the tank body (1).

10. The generator oil-water monitoring device according to claim 9, characterized in that, The liquid level measurement module (16) is a float liquid level gauge.

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