阅读说明：本技术 一种灵活布置、可靠性高的电站给水泵汽轮机组供油装置 (Flexibly-arranged and high-reliability oil supply device for steam turbine unit of water supply pump of power station ) 是由 薛源 崔玉玲 麦军 马扬 周志龙 于 2020-12-31 设计创作，主要内容包括：本发明提供一种灵活布置、可靠性高的电站给水泵汽轮机组供油装置,包括用于供油的润滑油母管,沿润滑油母管依次设置的油箱、油泵以及润滑油调压阀；润滑油调压阀的入口与出口之间还连通有旁路管,调压口处连通有执行机构信号管路。本发明针对电站给水泵汽轮机组供油装置进行灵活性与可靠性提升优化改造,更能满足电站实际需求；能够灵活布置在机房的0米或者8.6米层,有效解决了目前的供油装置在0米布置时所带来的的油压失稳问题,显著降低了设备失效风险,提高电站给水泵汽轮机组用油的稳定及可靠性；能够在现有供油装置的基础上进行改装,改造便捷,具有良好的市场前景。(The invention provides a flexibly-arranged and high-reliability oil supply device for a steam turbine set of a water supply pump of a power station, which comprises a main lubricating oil pipe for supplying oil, an oil tank, an oil pump and a lubricating oil pressure regulating valve, wherein the oil tank, the oil pump and the lubricating oil pressure regulating valve are sequentially arranged along the main lubricating oil pipe; a bypass pipe is communicated between the inlet and the outlet of the lubricating oil pressure regulating valve, and the pressure regulating port is communicated with an actuating mechanism signal pipeline. The invention aims at improving the flexibility and reliability of the oil supply device of the steam turbine set of the water supply pump of the power station, optimizes and reforms the oil supply device and can better meet the actual requirements of the power station; the oil supply device can be flexibly arranged on a 0-meter or 8.6-meter layer of a machine room, the problem of oil pressure instability caused by arrangement of 0 meter of the existing oil supply device is effectively solved, the risk of equipment failure is obviously reduced, and the stability and reliability of oil for a water supply pump turbine unit of a power station are improved; can reequip on current oil supply unit's basis, it is convenient to reform transform, has good market prospect.)

1. The utility model provides a nimble power station feed pump turboset oil supply unit that arranges, the reliability is high which characterized in that: the lubricating oil device comprises a lubricating oil main pipe (1) for supplying oil, an oil tank (2), an oil pump (3) and a lubricating oil pressure regulating valve (4) which are sequentially arranged along the lubricating oil main pipe (1); a bypass pipe (5) is communicated between an inlet and an outlet of the lubricating oil pressure regulating valve (4), and an actuating mechanism signal pipeline (6) is communicated at the pressure regulating port; a filter (7) is arranged at an outlet of the lubricating oil main pipe (1) close to the lubricating oil pressure regulating valve (4), and a pressure regulating oil pipe (8) is communicated between an inlet of the lubricating oil pressure regulating valve (4) and the oil pump (3); a stop valve (9) is arranged on the bypass pipe (5) in a matching way; and the actuating mechanism signal pipeline (6) is communicated with the part of the lubricating oil main pipe (1) behind the filter (7).

2. The power station feed pump steam turbine unit oil supply device with flexible arrangement and high reliability as claimed in claim 1, wherein: the oil pump (3) is a three-screw pump.

3. The power station feed pump steam turbine unit oil supply device with flexible arrangement and high reliability as claimed in claim 1, wherein: the lubricating oil pressure regulating valve (4) is a self-operated regulating valve.

4. The power station feed pump steam turbine unit oil supply device with flexible arrangement and high reliability as claimed in claim 1, wherein: the bypass pipe (5) is a stainless steel pipe; the stop valve (9) is a J61W-320P stop valve, and the drift diameter of the stop valve and the bypass pipe (5) is DN 10.

5. The power station feed pump steam turbine unit oil supply device with flexible arrangement and high reliability as claimed in claim 1, wherein: the throat diameter of the lubricating oil pressure regulating valve (4) is 40.

6. The flexibly arranged and highly reliable oil supply device for the steam turbine set of the feed pump of the power station as claimed in claim 5, wherein: the lubricating oil pressure regulating valve (4) is also provided with a piston type actuating mechanism.

Technical Field

The invention belongs to the technical field of coal-fired power generation, and particularly relates to a power station feed pump steam turbine unit oil supply device which is flexible in arrangement and high in reliability.

Background

In actual construction, an oil supply device of a steam turbine unit of the water supply pump is often arranged nearby, namely on the 8.6-meter floor of a steam turbine room, but part of power plants need to be arranged on the 0-meter floor of the steam turbine room due to the fact that the layout of other devices such as a factory building area and high and low pressure heaters conflicts. For the safe operation of a steam turbine set of a water supply pump of a power station, the stability of various parameters of a lubricating oil and regulating oil system is guaranteed to be crucial, and for a system for simultaneously supplying lubricating oil and regulating oil by one oil pump, the stability of the oil pressure of the lubricating oil and the oil pressure of the regulating oil can be kept to be influenced by a plurality of factors, wherein the change of the arrangement position of an oil supply device can greatly influence the stability of the oil pressure (especially the lubricating oil pressure) of the system, so that the system accident oil pump is repeatedly started to influence the safety of the system, and the point is most easily ignored.

Disclosure of Invention

In order to solve the problems, the invention discloses a flexible and high-reliability oil supply device for a water supply pump steam turbine set of a power station.

In order to achieve the purpose, the invention provides the following technical scheme:

a flexibly arranged and highly reliable oil supply device of a steam turbine set of a water supply pump of a power station comprises a main lubricating oil pipe for supplying oil, an oil tank, an oil pump and a lubricating oil pressure regulating valve which are sequentially arranged along the main lubricating oil pipe; a bypass pipe is communicated between an inlet and an outlet of the lubricating oil pressure regulating valve, and an actuating mechanism signal pipeline is communicated with the pressure regulating port; the lubricating oil main pipe is provided with a filter at an outlet close to the lubricating oil pressure regulating valve, and a pressure regulating oil pipe is communicated between the inlet of the lubricating oil pressure regulating valve and the oil pump; a stop valve is arranged on the bypass pipe in a matching way; and the actuating mechanism signal pipeline is communicated with a part of the lubricating oil main pipe behind the filter.

Further, the oil pump is a three-screw pump.

Furthermore, the lubricating oil pressure regulating valve is a self-operated regulating valve.

Further, the bypass pipe is a stainless steel pipe; the stop valve is a J61W-320P stop valve, and the drift diameter of the stop valve and the bypass pipe is DN 10.

Further, the throat diameter of the lubricating oil pressure regulating valve is 40.

Furthermore, the lubricating oil pressure regulating valve is also provided with a piston type actuating mechanism.

Compared with the prior art, the invention has the following beneficial effects:

1. flexibility and reliability of an oil supply device of a steam turbine set of a water supply pump of a power station are improved, optimized and modified, and actual requirements of the power station can be met;

2. the oil supply device can be flexibly arranged on a 0-meter or 8.6-meter layer of a machine room, the problem of oil pressure instability caused by arrangement of 0 meter of the existing oil supply device is effectively solved, the risk of equipment failure is obviously reduced, and the stability and reliability of oil for a water supply pump turbine unit of a power station are improved;

3. can reequip on current oil supply unit's basis, it is convenient to reform transform, has good market prospect.

Drawings

FIG. 1 is a schematic structural view of the present invention;

list of reference numerals: the lubricating oil system comprises a lubricating oil main pipe 1, an oil tank 2, an oil pump 3, a lubricating oil pressure regulating valve 4, a bypass pipe 5, an actuating mechanism signal pipeline 6, a filter 7, a pressure regulating oil pipe 8 and a stop valve 9.

Detailed Description

The technical solutions provided by the present invention will be described in detail below with reference to specific examples, and it should be understood that the following specific embodiments are only illustrative of the present invention and are not intended to limit the scope of the present invention.

As shown in fig. 1, the present invention is a schematic structural diagram of an oil supply device of a power station feed pump steam turbine set, which is flexibly arranged and has high reliability, and comprises a main lubricating oil pipe 1 for supplying oil, an oil tank 2, an oil pump 3 and a lubricating oil pressure regulating valve 4 which are sequentially arranged along the main lubricating oil pipe 1.

A bypass pipe 5 is communicated between the inlet and the outlet of the lubricating oil pressure regulating valve 4, and an actuating mechanism signal pipeline 6 is communicated at the pressure regulating port; a filter 7 is arranged at the position, close to the outlet of the lubricating oil pressure regulating valve 4, of the lubricating oil main pipe 1, and a pressure regulating oil pipe 8 is communicated between the inlet of the lubricating oil pressure regulating valve 4 and the oil pump 3; a stop valve 9 is arranged on the bypass pipe 5 in a matching way; the actuator signal line 6 is connected to a portion of the lube oil main 1 located behind the filter 7.

Wherein the oil pump 3 is a three-screw pump; the lubricating oil pressure regulating valve 4 is a self-operated regulating valve; the bypass pipe 5 is a stainless steel pipe; the stop valve 9 is a J61W-320P stop valve, and the drift diameter of the stop valve and the bypass pipe 5 is DN 10; the throat diameter of the lubricating oil pressure regulating valve 4 is 40, and the lubricating oil pressure regulating valve 4 is also provided with a piston type actuating mechanism.

When the invention is operated, lubricating oil and regulating oil are simultaneously supplied through the lubricating oil main pipe 1 and the pressure regulating oil pipe 8, the lubricating oil is throttled and decompressed by the lubricating oil pressure regulating valve 4 through the lubricating oil main pipe 1 and then supplied to a water feeding pump turbine unit, and the regulating oil is supplied through the lubricating oil main pipe 1 and the pressure regulating oil pipe 8.

The lubricating oil pressure regulating valve 4 is a self-operated regulating valve and is provided with a piston type actuating mechanism, the piston type actuating mechanism realizes feedback regulation on the valve by sampling lubricating oil behind a filter 7, and simultaneously obtains better regulation performance and wider regulation range, the requirement of 0 meter layer arrangement of an oil supply device is used, and the throat diameter of the lubricating oil pressure regulating valve 4 is designed to be 40, so that the regulation performance is better, the opening degree of the valve is moderate in normal operation, and the working life of moving parts such as a valve regulating spring and the like is favorably kept; the sampling point of the signal pipeline 6 of the actuating mechanism is arranged on the filter 7 nearby without penetrating through an equipment layer, so that the signal pipeline is prevented from being laid too long; the regulating valve actuating mechanism is changed into a piston type, the pressure regulating range behind the valve can reach 200 and 500KPa, a wider pressure regulating interval is provided, and the requirement that the lubricating oil pressure of a 17-meter layer is more than or equal to 180KPa can be completely met.

Meanwhile, a bypass is externally connected to the lubricating oil pressure regulating valve 4, the drift diameters of the bypass pipe 5 and the stop valve 9 are DN10, when the lubricating oil pressure regulating valve 4 is too small in valve opening due to the fact that problems such as failure of a regulating spring occur, when oil pressure drops, the stop valve 9 on the bypass pipe 5 can be opened as an emergency standby mode, oil pressure supplement is achieved, and the phenomenon that an accident oil pump is connected and started for a long time or even oil of a system is cut off is avoided.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all the modifications and equivalent substitutions should be covered by the claims of the present invention.