Flushing device for fire-resistant oil system

Abstract

The utility model belongs to the field of fire-resistant oil circulating flushing of steam turbines, and provides a fire-resistant oil system flushing device which comprises a fire-resistant oil system, an oil filter, a device oil tank and a high-speed flushing valve, and the fire-resistant oil system is provided with an oil return mother pipeline and a fire-resistant oil tank; the oil filter is connected with the fire-resistant oil tank; the temporary device oil tank is connected with the oil filter; and the high-speed flushing valve is respectively connected with the device oil tank and the main oil return mother pipeline. The device is simple and compact in structure, convenient and fast to construct, high in cleaning efficiency and good in effect.

Description

Technical Field

[0001] This application belongs to the field of steam turbine fire-resistant oil circulation flushing, and more specifically, relates to a fire-resistant oil system flushing device. Background Art

[0002] The fire-resistant oil system of a steam turbine generator set is an important part of the steam turbine governing and safety protection system, providing stable, reliable, and clean pressure oil for the steam turbine governing system, enabling the oil actuator to accurately and quickly control the opening of the steam valve and governing valve according to relevant instructions, so as to achieve the ultimate goal of controlling the steam turbine speed and generating load; whether the pressure oil provided by the fire-resistant oil system is clean and reliable directly affects the safety and reliability of the unit operation.

[0003] Traditional fire-resistant oil system circulation flushing method: Flush the branch pipelines simultaneously or flush multiple branches simultaneously, and the return oil goes back to the formal oil tank. Due to the low flushing pressure of the system, the low use efficiency of the flushing filter element, and the need to replace the flushing filter element multiple times, the flushing effect is still poor. At the same time, the oil tank cleaning work is affected by the environment, increasing the risk of secondary pollution of the fire-resistant oil system. Utility Model Content

[0004] In order to overcome the above-mentioned drawbacks in the prior art, the purpose of this application is to provide a fire-resistant oil system flushing device, which has a simple structure, is convenient and fast to construct, has a high cleaning efficiency and good effect, achieving the purpose of making the fire-resistant oil circulation flushing cleaner and more thorough.

[0005] The technical means adopted by this application to solve the above-mentioned technical problems is:

[0006] This application provides a fire-resistant oil system flushing device for cleaning a fire-resistant oil system, the fire-resistant oil system including a total oil inlet, a return oil header pipeline, and a fire-resistant oil tank, the fire-resistant oil tank being connected to the total oil inlet header pipeline, the flushing device including:

[0007] An oil filter, the oil filter being connected to the fire-resistant oil tank;

[0008] A device oil tank, the device oil tank being connected to the oil filter;

[0009] A high-speed flushing valve, the high-speed flushing valve being respectively connected to the device oil tank and the total return oil header pipeline.

[0010] Preferably, it further includes a sampling valve, the sampling valve being arranged on the connecting pipeline between the high-speed flushing valve and the device oil tank.

[0011] Preferably, it further includes a temporary oil tank level gauge, the temporary oil tank level gauge being installed on the device oil tank.

[0012] Preferably, the volume ratio of the temporary fuel tank to the fire-resistant oil tank is 1:1 - 5, and the material and anti-corrosion property of the temporary fuel tank are greater than or equal to those of the fire-resistant oil tank.

[0013] Preferably, the fire-resistant oil tank and the oil filter have a filter element, and the filtration accuracy of the filter element is 1 - 5 μm.

[0014] Compared with the prior art, the fire-resistant oil system flushing device of the present application has the following beneficial effects:

[0015] (1) Add a high-speed flushing valve for the branch

[0016] Add a high-speed flushing valve on the connecting pipeline between the temporary fuel tank and the main return oil pipeline, so that after starting the oil pump, the oil pressure in the oil pipeline can be adjusted. Adjust the high-speed flushing valve, so as to increase the flushing flow rate of the fire-resistant oil entering the main return oil pipeline. Similarly, increasing the flow rate can quickly raise the oil temperature of the fire-resistant oil system to the ideal flushing temperature, simulating the pressure, temperature, and flow rate of the normal operation oil system, and greatly improving the circulating flushing efficiency.

[0017] (2) Add a temporary fuel tank at the same time

[0018] Since the volume of the fuel tank of the fire-resistant oil supply device is generally too small, usually its manhole diameter is less than 500 mm, it is difficult for personnel to enter and exit, and the tank is filled with sampling components, magnetic rods and other related components inside, resulting in extremely difficult cleaning work during the circulating flushing of the tank, and it cannot be completely cleaned. Moreover, the fire-resistant oil itself is highly harmful and can easily cause harm to the cleaners. To prevent impurities in the pipeline from flowing back into the fuel tank, add a temporary fuel tank during pipeline flushing. Connect the return oil pipeline to the temporary fuel tank using a temporary pipeline, and then use an oil filter to filter the fire-resistant oil in the temporary fuel tank into the formal fuel tank. Since the fire-resistant oil in the temporary fuel tank is pumped to the fire-resistant oil tank by the oil filter, the formal fuel tank is prevented from being contaminated by impurities in the pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required to be used in the embodiments of the present application. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0020] Figure 1 It is a structural schematic diagram of the fire-resistant oil system flushing device of the present application.

[0021] Marking description:

[0022] 1. Fire-resistant oil system; 2. Total return oil header pipe; 3. Total inlet oil header pipe; 4. Fire-resistant oil tank; 5. Oil filter; 6. Temporary tank; 7. High-speed flushing valve; 8. Sampling valve. Detailed implementation manners

[0023] In order to more clearly understand the above-mentioned objects, features and advantages of the present utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific implementation manners. It should be noted that, without conflict, the implementation manners of the present application and the features in the implementation manners can be combined with each other. In the following description, many specific details are set forth in order to fully understand the present utility model. The described implementation manners are only a part of the implementation manners of the present utility model, rather than all of the implementation manners. Based on the implementation manners in the present utility model, all other implementation manners obtained by those of ordinary skill in the art without making creative efforts fall within the protection scope of the present utility model.

[0024] It should be noted that: Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model in this specification are only for the purpose of describing specific implementation manners, and are not intended to limit the present utility model. Similar reference numerals and letters in the following drawings indicate similar items. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. At the same time, in the description of the present application, the terms "first", "second", etc. are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

[0025] As Figure 1 shown, in this embodiment, a flushing device for a fire-resistant oil system 1 is provided, which is used to clean the fire-resistant oil system. The fire-resistant oil system includes a total return oil header pipe 2, a total inlet oil header pipe 3 and a fire-resistant oil tank 4. The fire-resistant oil tank 4 is connected to the total inlet oil header pipe 3. The flushing device includes an oil filter 5, a temporary tank 6 and a high-speed flushing valve 7. The oil filter 5 is connected to the fire-resistant oil tank 4; the temporary tank 6 is connected to the oil filter 5; the high-speed flushing valve 7 is respectively connected to the temporary tank 6 and the total return oil header pipe 2.

[0026] In some preferred embodiments of the present utility model, a sampling valve 8 is further included, and the sampling valve 8 is arranged on the connecting pipeline between the high-speed flushing valve 7 and the temporary tank 6.

[0027] Preferably, a temporary tank liquid level gauge is further included, and the temporary tank liquid level gauge is installed on the temporary tank 6.

[0028] Preferably, the volume ratio of the temporary fuel tank 6 to the fire-resistant oil tank 4 is 1:1 - 5, and the material and anti-corrosion property of the temporary fuel tank 5 are greater than or equal to those of the fire-resistant oil tank 4.

[0029] In some preferred embodiments of the present invention, the fire-resistant oil tank 4 is provided with a filter element, and the filtration accuracy of the filter element is 1 - 5 μm.

[0030] Compared with the prior art, the flushing device of the fire-resistant oil system 1 of the present application has the following beneficial effects:

[0031] Adding a high-speed flushing valve 7: A high-speed flushing valve 7 is added to the connecting pipeline between the temporary fuel tank 6 and the main return oil pipeline 2, so that after starting the oil pump, the oil pressure in the connecting pipeline between the temporary fuel tank 6 and the main return oil pipeline 2 can be boosted to the design pressure, and the high-speed flushing valve 7 is adjusted, thereby greatly increasing the flushing flow rate of the fire-resistant oil entering the main return oil pipeline 2, quickly raising the oil temperature to the ideal flushing temperature, greatly improving the circulating flushing efficiency, increasing the flushing intensity of impurities in the pipeline, and simultaneously causing the whole pipeline to generate high-frequency vibration, so that the impurities attached to the inner wall quickly fall off.

[0032] Adding a temporary fuel tank 6: It avoids the impurities in the pipeline during the flushing of the fire-resistant oil from flowing back to the fuel tank, reduces the number of times of fuel tank cleaning. When flushing the pipeline, a temporary fuel tank 6 is added, and a temporary pipeline is used to connect the return oil pipeline to the temporary fuel tank 6, and then an oil filter 5 is used to filter the fire-resistant oil in the temporary fuel tank 6 into the formal fuel tank, thus effectively avoiding the pollution of the formal fuel tank by impurities in the pipeline. The cleaning work of the fire-resistant oil tank during the circulating flushing process is extremely difficult, and the fire-resistant oil itself is highly harmful. During the fuel tank cleaning process, it is extremely easy to cause harm to the human body and the environment. Using this temporary fuel tank 6 reduces the fuel tank cleaning work, reduces the secondary pollution of the system caused by fuel tank cleaning and the personal injury during the cleaning process.

[0033] Adding a sampling valve: A sampling valve is added to the pipeline connecting the temporary fuel tank 6. When flushing each inlet and return oil pipeline of the fire-resistant oil system 1, separate sampling can be carried out, so as to confirm whether each inlet and return oil pipeline is qualified for flushing, avoid cross-contamination between each inlet and return oil pipeline, and increase the monitoring measures.

[0034] The above is only the specific implementation manner of the present application and is not used to limit the protection scope of the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or replacements, which should also be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

[0035] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

Claims

1. A fire-resistant oil system flushing device, which is used to clean the fire-resistant oil system, the fire-resistant oil system comprises a main oil return mother pipeline, a main oil inlet mother pipeline and a fire-resistant oil tank, the fire-resistant oil tank is connected to the main oil inlet mother pipeline, characterized in that: The flushing device includes: An oil filter, the oil filter being connected to the fire-resistant oil tank; A temporary oil tank connected to the oil filter; A high-speed flushing valve is connected to the temporary oil tank and the main oil return main pipeline respectively.

2. The fire-resistant fuel system flushing device according to claim 1, characterized in that: It also includes a sampling valve, which is arranged on the connecting pipeline between the high-speed flushing valve and the temporary oil tank.

3. The fire-resistant fuel system flushing device according to claim 1, characterized in that: It also includes a temporary oil tank liquid level gauge, which is installed on the temporary oil tank.

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