CN217380667U - Emergency oil supply system for steam turbine of power plant - Google Patents
Emergency oil supply system for steam turbine of power plant Download PDFInfo
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- CN217380667U CN217380667U CN202221604656.0U CN202221604656U CN217380667U CN 217380667 U CN217380667 U CN 217380667U CN 202221604656 U CN202221604656 U CN 202221604656U CN 217380667 U CN217380667 U CN 217380667U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The utility model relates to a steam turbine oil supply especially relates to a power plant's steam turbine emergency oil feeding system. The replacement of the safety guarantee equipment of the steam turbine generator unit is guaranteed. Comprises a critical direct current oil supply system positioned outside a main oil tank; the emergency direct-current oil supply system comprises a direct-current accident oil pump arranged outside a main oil tank, wherein an oil inlet of the direct-current accident oil pump is communicated with an oil outlet of the main oil tank of the steam turbine, and an oil outlet of the direct-current accident oil pump is communicated with a lubricating oil system; an oil inlet of the direct-current accident oil pump is connected with an oil outlet of the direct-current accident oil pump through an oil discharge pool pipeline, a first end of the oil discharge pool pipeline is connected with an oil inlet of the direct-current accident oil pump, and a second end of the oil discharge pool pipeline is communicated with the accident oil discharge pool; an oil inlet of the direct-current emergency oil pump is communicated with the middle part of the pipeline of the oil discharge pool; and a filter is arranged on a connecting pipeline of the direct-current accident oil pump and the lubricating oil system.
Description
Technical Field
The utility model relates to a steam turbine oil supply especially relates to a power plant's steam turbine emergency oil feeding system.
Background
The steam turbine of the power plant is important production equipment in the power production process, and an oil supply system of the steam turbine is used for providing lubrication for a support bearing, a thrust bearing and a turning gear of a steam turbine generator, or supplying backup oil for a hydrogen sealing system and providing pressure oil for operating a mechanical overspeed tripping device.
At present, a turbine emergency oil supply system only has one direct-current emergency oil pump, and the oil pump is submerged in a main oil tank of a turbine and is used for providing lubricating oil and cooling oil with certain pressure and flow to the turbine lubricating oil system in the process of emergency shutdown of the turbine. The direct-current accident oil pump is an indispensable component in the whole critical oil supply system and is also a last safety barrier of the whole oil supply system, and plays a vital role in safe and stable operation of the steam turbine.
However, only one direct current accident oil pump has the following disadvantages:
1. only one emergency direct-current oil pump is provided, and the safety guarantee is low.
2. The direct-current oil pump in an emergency accident is submerged in the main oil tank of the steam turbine, and cannot be maintained at ordinary times.
3. The direct-current oil pump for emergency accidents is connected with a pipeline inside a main oil tank of the steam turbine, and conventional maintenance cannot be carried out when problems occur.
4. The trial operation of the direct-current oil pump in an emergency accident generally arranges that the unit is close to the end of the whole set of starting according to the process requirements, and if the trial operation is abnormal, the normal operation arrangement of the starting of the whole set of unit can be influenced.
Disclosure of Invention
The utility model discloses be exactly to the defect that prior art exists, provide a power plant's steam turbine emergency oil feeding system.
In order to achieve the purpose, the utility model adopts the following technical scheme, which is characterized in that the emergency direct current oil supply system is arranged outside the main oil tank.
The emergency direct-current oil supply system comprises a direct-current accident oil pump arranged outside a main oil tank, wherein an oil inlet of the direct-current accident oil pump is communicated with an oil outlet of the main oil tank of the steam turbine, and an oil outlet of the direct-current accident oil pump is communicated with a lubricating oil system.
An oil inlet of the direct-current accident oil pump is connected with an oil outlet of the direct-current accident oil pump through an oil discharge pool pipeline, a first end of the oil discharge pool pipeline is connected with an oil inlet of the direct-current accident oil pump, and a second end of the oil discharge pool pipeline is communicated with the accident oil discharge pool; and an oil inlet of the direct-current accident oil pump is communicated with the middle part of the pipeline of the oil discharge pool.
A filter is arranged on a connecting pipeline between the direct-current accident oil pump and the lubricating oil system, a check valve is arranged on the connecting pipeline between the direct-current accident oil pump and the filter, and a stop valve is arranged on the connecting pipeline between the filter and the lubricating oil system.
Furthermore, an oil inlet switch valve is arranged on a connecting pipeline between the direct-current accident oil pump and the oil discharge pool pipeline access point.
Furthermore, an oil outlet switch valve is arranged on the oil discharge pool pipeline between the oil outlet of the direct current accident oil pump and the access point of the oil discharge pool pipeline.
Furthermore, an oil discharge pool switch valve is arranged on an oil discharge pool pipeline between the oil discharge pool pipeline access point and the accident oil discharge pool.
Specifically, the number of the oil outlet switch valve and the oil discharge tank switch valve is two, and the two switch valves are used as redundant settings to prevent one of the two switch valves from being damaged to cause inconvenience in maintenance or influence oil leakage. On the other hand, a redundant valve is developed as a subsequent design.
Furthermore, a filter pre-switch valve is arranged on a connecting pipeline between the filter and the check valve.
Furthermore, a filter rear-mounted switch valve is arranged on a connecting pipeline between the filter and the stop valve.
Compared with the prior art the utility model discloses beneficial effect.
The utility model discloses under the condition that remains emergency oil feeding system in original main oil tank, make original and newly-increased emergency oil feeding system coexistence, every set of system all can the independent operation to the substitutability that turbo generator set's safety guarantee equipment switched each other has been guaranteed.
Drawings
The present invention will be further described with reference to the accompanying drawings and the following detailed description. The scope of protection of the present invention is not limited to the following description.
FIG. 1 is a schematic connection diagram of an emergency oil supply system of a power plant turbine according to an embodiment.
In the figure, 1 is an oil discharge tank switch valve, 2 is an oil outlet of a main oil tank, 3 is a stop valve, 4 is a check valve, 5 is a filter preposition switch valve, 6 is a filter postposition switch valve, 7 is an oil outlet switch valve, 8 is an oil inlet switch valve, 9 is a direct current emergency oil pump outside the main oil tank, and 10 is a filter.
Detailed Description
As shown in fig. 1, the specific embodiment: comprises a critical direct current oil supply system positioned outside a main oil tank; the emergency direct-current oil supply system comprises a direct-current accident oil pump 9 arranged outside a main oil tank, an oil inlet of the direct-current accident oil pump 9 is communicated with an oil outlet 2 of the main oil tank of the steam turbine, and an oil outlet of the direct-current accident oil pump 9 is communicated with a lubricating oil system.
An oil inlet of the direct current accident oil pump 9 is connected with an oil outlet of the direct current accident oil pump 9 through an oil discharge pool pipeline, a first end of the oil discharge pool pipeline is connected with an oil inlet of the direct current accident oil pump 9, and a second end of the oil discharge pool pipeline is communicated to an accident oil discharge pool or called an accident oil discharge pool inlet, is positioned above the accident oil discharge pool; and an oil inlet of the direct current accident oil pump 9 is communicated with the middle part of the pipeline of the oil discharge pool.
A filter 10 or a filter screen is arranged on a connecting pipeline between the direct-current accident oil pump 9 and the lubricating oil system, a check valve 4 is arranged on the connecting pipeline between the direct-current accident oil pump 9 and the filter 10, and a stop valve 3 is arranged on the connecting pipeline between the filter 10 and the lubricating oil system.
Preferably, an oil inlet switch valve 8 is arranged on a connecting pipeline between the direct current accident oil pump 9 and the access point of the oil drainage pool pipeline. And an oil outlet switch valve 7 is arranged on the oil discharge pool pipeline between the oil outlet of the direct current accident oil pump 9 and the access point of the oil discharge pool pipeline. And an oil discharge pool switch valve 1 is arranged on an oil discharge pool pipeline between an access point of the direct-current emergency oil pump 9 and the oil discharge pool pipeline and the emergency oil discharge pool.
Preferably, the number of the oil outlet switch valve 7 and the number of the oil drain pool switch valve 1 are two, and the two switch valves are used as redundant settings, so that one of the two switch valves is prevented from being damaged to cause inconvenience in maintenance or influence oil leakage. On the other hand, a redundant valve is developed as a subsequent design.
And when the oil outlet 2 of the main oil tank or the pipeline of the oil drainage pool needs to be closed, the oil outlet switch valve 7 is closed. If the oil outlet switch valve 7 is opened, the oil discharge pool switch valve 1 is closed and the oil inlet switch valve 8 is opened, the pipeline where the direct current accident oil pump 9 (namely, the newly added direct current accident oil pump) outside the main oil tank is located is filled with oil, and the main oil tank is opened. If the oil outlet switch valve 7 is opened, the oil discharge pool switch valve 1 is opened and the oil inlet switch valve 8 is closed, the direct current accident oil pump 9 (namely, a newly added direct current accident oil pump) outside the main oil tank does not work without oil, and the main oil tank is communicated with the accident oil discharge pool.
Preferably, a filter pre-switch valve 5 is arranged on a connecting pipeline between the filter 10 and the check valve 4. And a filter rear-mounted switch valve 6 is arranged on a connecting pipeline between the filter 10 and the stop valve 3. The arrangement of the pre-filter switch valve 5 and the post-filter switch valve 6 enables the pipeline to be closed in time when the filter 10 is maintained and replaced, and oil leakage or oil spilling caused by replacement of the filter 10 is reduced.
Specifically, the direct current accident oil pump 9 adopts a set of 1 oil pump with 168m/h flow rate, 1 oil pump with JLISY150-100 and 200A type, 1 direct current motor with 3000r/min 2P-30KW rotation speed and 10 filters with 168m/h flow rate and 40um filter precision.
In practical use, the two independent emergency direct-current oil pumps are started by taking the system pressure reduced to (0.07-0.076) MPa as a trigger point, the original emergency direct-current oil pump in the main oil tank can be used as a first trigger point, and the newly-added emergency direct-current oil supply system is used for standby.
And thirdly, because the newly-added emergency oil supply system is arranged outside the main oil tank, the requirements of visual monitoring during regular test of the equipment and the flexibility and convenience of maintenance when the equipment is defective are met. Meanwhile, the reliability of the emergency oil supply system of the steam turbine is enhanced.
It should be understood that the above detailed description of the present invention is only for illustrating the present invention and is not limited by the technical solutions described in the embodiments of the present invention, and those skilled in the art should understand that the present invention can still be modified or equivalently replaced to achieve the same technical effects; as long as the use requirement is satisfied, the utility model is within the protection scope.
Claims (6)
1. The emergency oil supply system of the steam turbine of the power plant is characterized in that: comprises a critical direct current oil supply system positioned outside a main oil tank;
the emergency direct-current oil supply system comprises a direct-current accident oil pump arranged outside a main oil tank, wherein an oil inlet of the direct-current accident oil pump is communicated with an oil outlet of the main oil tank of the steam turbine, and an oil outlet of the direct-current accident oil pump is communicated with a lubricating oil system;
an oil inlet of the direct-current accident oil pump is connected with an oil outlet of the direct-current accident oil pump through an oil discharge pool pipeline, a first end of the oil discharge pool pipeline is connected with an oil inlet of the direct-current accident oil pump, and a second end of the oil discharge pool pipeline is communicated with the accident oil discharge pool; an oil inlet of the direct-current emergency oil pump is communicated with the middle part of the pipeline of the oil drainage pool;
a filter is arranged on a connecting pipeline between the direct-current emergency oil pump and the lubricating oil system, a check valve is arranged on the connecting pipeline between the direct-current emergency oil pump and the filter, and a stop valve is arranged on the connecting pipeline between the filter and the lubricating oil system.
2. The power plant steam turbine emergency oil supply system of claim 1, further comprising: and an oil inlet switch valve is arranged on a connecting pipeline between the direct-current accident oil pump and the access point of the pipeline of the oil discharge pool.
3. The power plant turbine emergency oil supply system of claim 2, wherein: and an oil outlet switch valve is arranged on the oil discharge pool pipeline between the oil outlet of the direct current accident oil pump and the access point of the oil discharge pool pipeline.
4. The power plant steam turbine emergency oil supply system of claim 2, wherein: and an oil discharge tank switch valve is arranged on an oil discharge tank pipeline between the oil discharge tank pipeline access point and the accident oil discharge tank.
5. The power plant steam turbine emergency oil supply system of claim 1, further comprising: and a filter front-mounted switch valve is arranged on a connecting pipeline between the filter and the check valve.
6. The power plant steam turbine emergency oil supply system of claim 1, further comprising: and a filter rear-mounted switch valve is arranged on a connecting pipeline between the filter and the stop valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221604656.0U CN217380667U (en) | 2022-06-26 | 2022-06-26 | Emergency oil supply system for steam turbine of power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221604656.0U CN217380667U (en) | 2022-06-26 | 2022-06-26 | Emergency oil supply system for steam turbine of power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217380667U true CN217380667U (en) | 2022-09-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221604656.0U Active CN217380667U (en) | 2022-06-26 | 2022-06-26 | Emergency oil supply system for steam turbine of power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217380667U (en) |
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2022
- 2022-06-26 CN CN202221604656.0U patent/CN217380667U/en active Active
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