Oil washing and filtering device for lubricating oil pipeline of steam turbine

Abstract

The utility model discloses an oil washing and filtering device for a lubricating oil pipeline of a steam turbine, which relates to the technical field of lubricating oil pipelines and comprises an oil pipeline, a filtering mechanism, a standby pipeline, a first valve and a second valve. The first valve and the filtering mechanism are arranged on a pipe body of the oil pipeline between the access points of the standby pipeline, the second valve is arranged on the standby pipeline, and the filtering mechanism is used for filtering all lubricating oil flowing through the oil pipeline. According to the steam turbine lubricating oil pipeline oil washing filtering device, the filtering piece in the filtering device can be cleaned or replaced under the condition that normal operation of a lubricating oil system is not affected, the problems of lubricating oil waste and attached potential safety hazards caused by lubricating oil spilling are solved, and meanwhile the steam turbine lubricating oil washing efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of lubricating oil pipelines, in particular to an oil washing and filtering device for a steam turbine lubricating oil pipeline. Background Art

[0002] When a steam turbine is restarted after a major overhaul, it needs to be cleaned and filtered. Existing cleaning methods filter the turbine lubricating oil by adding an auxiliary oil filter inside the turbine or by adding a filter device outside the turbine. Both methods require the suspension of related equipment in the turbine oil system while the filter is replaced, delaying production and reducing production efficiency. For example, Chinese patent application (CN108006427A) discloses a conveniently removable lubricating oil filter device. The filter device is mounted on an oil pipeline outside the turbine. A circular hole is provided in the center of the filter gland, through which bolts are inserted to securely connect the filter. The filter can be replaced by loosening the bolts. However, the filter device described in this patent requires the suspension of related equipment during filter replacement, delaying production and impacting equipment use. Furthermore, the addition of an auxiliary oil filter increases factory energy consumption. The cost of replacing the filter element is high if it becomes clogged. Moreover, large amounts of lubricating oil entering the auxiliary equipment can cause the turbine oil tank level to drop, increasing the risk of turbine operation. Summary of the Invention

[0003] The purpose of the utility model is to provide a steam turbine lubricating oil pipeline oil washing and filtering device to solve the problems existing in the above-mentioned prior art, reduce the operating risks of the steam turbine, and at the same time improve the oil washing efficiency of the steam turbine lubricating oil.

[0004] To achieve the above purpose, the present invention provides the following solutions:

[0005] The utility model provides an oil washing and filtering device for a steam turbine lubricating oil pipeline, comprising: an oil pipeline and a filtering mechanism, and is characterized in that: it also comprises a spare pipeline, a first valve and a second valve, the oil pipeline is used to be connected to the lubricating oil pipeline, and both ends of the spare pipeline are respectively connected to and communicated with the oil pipeline, the first valve and the filtering mechanism are sequentially arranged on the pipe body of the oil pipeline between the access points of the spare pipeline along the flow direction of the lubricating oil, the second valve is arranged on the spare pipeline, and the filtering mechanism is used to filter the lubricating oil flowing through the oil pipeline.

[0006] Preferably, the filtering mechanism includes a filter cavity, a blockage detection mechanism and a filter element. The filter cavity is arranged on the oil pipeline and is connected to the oil pipeline. The filter element is detachably connected to the filter cavity. The blockage detection mechanism is used to judge the blockage condition of the filter element.

[0007] Preferably, the filter cavity includes a filter screen cover and a shell, the shell has an opening, the filter screen cover is detachably sealed and connected to the opening and can close the opening, and the filter element can enter the shell from the opening.

[0008] Preferably, the blockage detection mechanism includes a pressure relief valve and a detection pipeline, one end of the detection pipeline is sealed and passes through the filter cavity and extends into the filter element, and the pressure relief valve is arranged on the end of the detection pipeline located outside the filter cavity.

[0009] Preferably, a through hole is provided on the filter cover, and the detection pipeline sealably passes through the through hole and enters into the shell, and the detection pipeline can seal the through hole.

[0010] Preferably, the filter element includes a filter cartridge, the top of the filter cartridge contacts the inner top surface of the filter cavity, the bottom of the filter cartridge contacts the inner bottom surface of the filter cavity, and the detection pipeline extends into the filter cartridge.

[0011] Preferably, the portion of the filter cartridge located in the oil pipeline is provided with an opening on the oil inlet side of the oil pipeline.

[0012] Preferably, the shell includes a raised tube portion and an oil delivery pipe portion, the oil delivery pipe portion is used to be connected to the lubricating oil pipeline, one end of the raised tube portion is connected to and communicated with the oil delivery pipe portion, the other end of the raised tube portion is provided with the opening, the axial direction of the raised tube portion is perpendicular to the axis of the oil delivery pipe portion, and the filter element enters the oil delivery pipe portion from the opening through the raised tube portion.

[0013] Preferably, the filter element is a stainless steel filter element.

[0014] Compared with the prior art, the utility model has achieved the following technical effects:

[0015] The utility model provides an oil washing and filtering device for the lubricating oil pipeline of a steam turbine. By arranging a spare pipeline and a second valve on the spare pipeline, and arranging a valve on the oil pipeline with a filtering mechanism, when the first valve is closed and the second valve is opened, the lubricating oil flows through the spare pipeline and does not flow into the oil pipeline, so that the filter element in the filtering device can be cleaned or replaced without affecting the normal operation of the lubricating oil system, thereby reducing the operating risk of the steam turbine and improving the oil washing efficiency of the steam turbine lubricating oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 This is a schematic structural diagram of a steam turbine lubricating oil washing and filtering device in one embodiment of the present utility model;

[0018] Figure 2 A schematic structural diagram of the filtering mechanism of the oil washing and filtering device for the lubricating oil pipeline of a steam turbine provided by the utility model;

[0019] Among them: 1- oil pipeline; 2- spare pipeline; 21- lubricating oil pipeline; 3- first valve; 4- filter mechanism; 5- second valve; 6- pressure relief valve; 7- detection pipeline; 8- filter gland; 9- filter element; 10- housing; 11- oil pipeline section; DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0022] In a preferred embodiment of the present invention, a steam turbine lubricating oil pipeline oil washing and filtering device is provided. Figures 1-2 As shown, it includes an oil pipeline 1, a filtering mechanism 4, a spare pipeline 2, a first valve 3 and a second valve 5, as shown in FIG. Figure 1As shown, the oil pipeline 1 is used to connect to the lubricating oil pipeline 21, and the two ends of the standby pipeline 2 are respectively connected to and communicated with the oil pipeline 1. The first valve 3 and the filter mechanism 4 are sequentially arranged on the pipe body of the oil pipeline 1 between the access points of the standby pipeline 2 along the direction of the lubricating oil flow. The second valve 5 is arranged on the standby pipeline 2, and the filter mechanism 4 is used to filter the lubricating oil flowing through the oil pipeline 1. When the second valve 5 is closed, the lubricating oil flows into the oil pipeline 1 through the lubricating oil pipeline 21, and the filter mechanism 4 filters the lubricating oil flowing through the oil pipeline 1; when the first valve 3 is closed, the lubricating oil flows into the standby pipeline 2 through the lubricating oil pipeline 21. At this time, the clogged filter element 9 in the filter mechanism 4 can be removed and replaced, so that the filter element 9 in the filter mechanism 4 can be cleaned or replaced without affecting the normal operation of the lubricating oil system, thereby improving the oil washing efficiency of the steam turbine lubricating oil.

[0023] In a preferred embodiment of the present invention, the filter mechanism 4 includes a filter cavity, a blockage detection mechanism, and a filter element 9. The filter cavity is disposed on and communicates with the oil pipeline 1. The filter element 9 is detachably connected to the filter cavity. The blockage detection mechanism is used to determine the blockage status of the filter element 9. By providing the blockage detection mechanism, the blockage status of the filter element 9 can be determined in a timely manner, allowing the filter element 9 to be replaced in a timely manner.

[0024] In a preferred embodiment of the present invention, the filter chamber includes a filter screen gland 8 and a housing 10. The housing 10 has an opening. The filter screen gland 8 is detachably sealed and connected to the opening and can close the opening. The filter element 9 can enter the housing 10 through the opening. By opening the filter screen gland 8, the filter element 9 can be removed from the opening on the housing 10 or placed into the housing 10, which facilitates the operator to replace the filter element 9.

[0025] In a preferred embodiment of the present invention, the blockage detection mechanism includes a pressure relief valve 6 and a detection line 7. One end of the detection line 7 is sealed and extends through the filter cavity and into the filter element 9. The pressure relief valve 6 is located at the end of the detection line 7 that is located outside the filter cavity. When the filter element 9 is clogged, lubricating oil will concentrate inside the filter element 9 and cover one end of the detection line 7. Opening the pressure relief valve 6 and observing the lubricating oil escaping from the detection line 7 effectively determines that the filter element 9 is clogged, allowing the filter element 9 to be replaced promptly, thereby improving the efficiency of the turbine lubricating oil washing.

[0026] In a preferred embodiment of the present invention, a through hole is formed in the filter gland 8, through which the detection line 7 seals and passes into the housing 10. The through hole allows the detection line 7 to be inserted into the housing 10, and the detection line 7 seals the through hole to prevent the lubricating oil from flowing out of the through hole.

[0027] In a preferred embodiment of the present invention, the filter element includes a filter cartridge 9, the top of the filter cartridge 9 contacts the inner top surface of the filter cavity, the bottom of the filter cartridge 9 contacts the inner bottom surface of the filter cavity, and the detection pipeline extends into the filter cartridge 9. The filter cartridge 9 can cover most of the area of ​​the oil pipeline 1, so that the filter cartridge 9 can effectively filter the lubricating oil flowing through the oil pipeline 1. Here, the side wall of the filter cartridge 9 does not completely fit into the filter cavity, but the gap between the two is small. When determining whether the filter cartridge 9 is blocked, it will not affect the filtration of the lubricating oil.

[0028] In a preferred embodiment of the present invention, the portion of the filter cartridge located within the oil pipeline 1 is provided with an opening on the oil inlet side of the oil pipeline 1. The opening on one side of the filter cartridge allows the lubricating oil flowing through the oil pipeline 1 to enter the filter cartridge, thereby making it easier to determine whether the filter element 9 is clogged.

[0029] In a preferred embodiment of the present invention, the housing 10 includes a raised tube portion and an oil delivery tube portion 11. The oil delivery tube portion 11 is used to connect to the lubricating oil pipeline 21. One end of the raised tube portion is connected to and communicates with the oil delivery tube portion 11, and the other end of the raised tube portion is provided with an opening. The axial direction of the raised tube portion is perpendicular to the axis of the oil delivery tube portion 11, and the filter element 9 enters the oil delivery tube portion 11 from the opening through the raised tube portion. The end face of the raised tube portion is a flat surface, and the filter cover 8 can be sealed with the raised portion by bolts. However, the housing 10 is a curved surface, which is not easy to seal with the filter cover 8. Therefore, the provision of the raised portion is more conducive to the filter cover 8 and the opening of the housing 10.

[0030] In a preferred embodiment of the present invention, the filter element 9 is a stainless steel filter element 9. Stainless steel is easy to clean, which is more conducive to the cleaning of the filter element 9 in this application.

[0031] This utility model uses specific examples to illustrate the principles and implementation methods of the invention. The above examples are only intended to help understand the method and core concept of the invention. At the same time, those skilled in the art will find that the specific implementation methods and application scopes may vary based on the concept of the utility model. In summary, the contents of this specification should not be construed as limiting the present invention.

Claims

1. A steam turbine lubricating oil pipeline oil washing and filtering device, comprising: An oil pipeline and a filtering mechanism, characterized in that: it also includes a spare pipeline, a first valve and a second valve, the oil pipeline is used to connect to the lubricating oil pipeline, and both ends of the spare pipeline are respectively connected to and communicate with the oil pipeline, the first valve and the filtering mechanism are sequentially arranged on the pipe body of the oil pipeline between the access points of the spare pipeline along the flow direction of the lubricating oil, the second valve is arranged on the spare pipeline, and the filtering mechanism is used to filter the lubricating oil flowing through the oil pipeline.

2. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 1, characterized in that: The filtering mechanism includes a filter cavity, a blockage detection mechanism and a filter element. The filter cavity is arranged on the oil pipeline and is connected to the oil pipeline. The filter element is detachably connected to the filter cavity. The blockage detection mechanism is used to judge the blockage status of the filter element.

3. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 2, characterized in that: The filter cavity includes a filter screen cover and a shell. The shell has an opening. The filter screen cover is detachably sealed and connected to the opening and can close the opening. The filter element can enter the shell from the opening.

4. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 3, characterized in that: The blockage detection mechanism includes a pressure relief valve and a detection pipeline. One end of the detection pipeline is sealed and passes through the filter cavity and extends into the filter element. The pressure relief valve is arranged on the end of the detection pipeline located outside the filter cavity.

5. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 4, characterized in that: A through hole is provided on the filter gland, and the detection pipeline sealably passes through the through hole and enters into the shell, and the detection pipeline can seal the through hole.

6. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 5, characterized in that: The filter element includes a filter barrel, the top of the filter barrel contacts the inner top surface of the filter cavity, the bottom of the filter barrel contacts the inner bottom surface of the filter cavity, and the detection pipeline extends into the filter barrel.

7. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 6, characterized in that: The portion of the filter barrel located in the oil pipeline is provided with an opening on the oil inlet side of the oil pipeline.

8. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 3, characterized in that: The shell includes a raised tube portion and an oil delivery pipe portion, the oil delivery pipe portion is used to be connected to the lubricating oil pipeline, one end of the raised tube portion is connected to and communicated with the oil delivery pipe portion, the other end of the raised tube portion is provided with the opening, the axial direction of the raised tube portion is perpendicular to the axis of the oil delivery pipe portion, and the filter element enters the oil delivery pipe portion from the opening through the raised tube portion.

9. The oil washing and filtering device for the lubricating oil pipeline of a steam turbine according to claim 2, characterized in that: The filter element is a stainless steel filter element.

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