CN217129771U

CN217129771U - Trip control device for steam turbine feed pump of thermal power plant

Info

Publication number: CN217129771U
Application number: CN202220676423.5U
Authority: CN
Inventors: 刘润; 张震坤; 刘逸峰; 李辉; 吕晶石; 聂广阳; 廖勇; 邹仁; 阳斌; 张梦洁; 杜茜雅
Original assignee: Huaneng Anyuan Power Generation Co Ltd
Current assignee: Huaneng Anyuan Power Generation Co Ltd
Priority date: 2022-03-28
Filing date: 2022-03-28
Publication date: 2022-08-05
Anticipated expiration: 2032-03-28

Abstract

The utility model discloses a steam turbine of thermal power plant water-feeding pump tripping control device, including water-feeding pump main part, installation base, solenoid valve, first water pipe and spring, water-feeding pump main part lower extreme is provided with the installation base, be provided with the solenoid valve in the water-feeding pump main part, be provided with the gag lever post on the filter, and the gag lever post outside is connected with the carriage release lever, filter internally mounted has the spring. This steam turbine feed pump trip control device of thermal power plant, can filter water through the filter, thereby prevent that the inside impurity of water from entering into inside the feed pump, lead to it to take place the tripping operation, and impurity after filtering will fall to the filter tube lower extreme, can conveniently observe through the transparent plate, thereby decide whether clear up, make it conveniently use, and the accessible removes the pole and removes the gag lever post, make it dismantle and install the filter, thereby the convenience washs or changes the filter, thereby convenient to use.

Description

Trip control device for steam turbine feed pump of thermal power plant

Technical Field

The utility model relates to a feed pump technical field specifically is a trip control device of steam turbine feed pump of thermal power plant.

Background

The large-scale generator set generally adopts one electric water feeding pump and two steam-driven water feeding pumps, the electric water feeding pump is used for starting and stopping the machine and standby in accidents, and the adjustment of the electric water feeding pump mainly depends on the adjustment of a hydraulic coupler scoop tube and is matched with a boiler water feeding adjusting valve. After the steam-driven water feeding pump is flushed and warmed up to 3000 r/min, the operation mode is switched to a remote control operation mode, and the water feeding amount is regulated and controlled by the rotating speed. The steam source for driving the small steam turbine is an auxiliary steam source, a four-extraction and cold-end reheating steam three-way steam source, exhaust is discharged into a condenser, and the existing tripping loop of the pneumatic water-feeding pump generally adopts a four-in-two mode in series-parallel connection, namely 4 tripping electromagnetism AST1, AST2, AST3 and AST4, and adopts a connection mode of grouping, parallel connection and series connection. The electromagnetic valves AST1 and AST3 are connected in parallel to serve as an electromagnetic valve group 1, AST2 and AST4 are connected in parallel to serve as an electromagnetic valve group 2, after the electromagnetic valve group 1 is connected with the electromagnetic valve group 2 in series, a single electromagnetic valve is powered off, a safety oil drainage oil path cannot be conducted, and a steam-driven water supply pump does not trip; when at least one of the two groups of electromagnetic valves is powered off, the whole safety oil drainage oil path is conducted, after pressure relief, the main throttle valve of the steam-driven water-feeding pump and the steam-supplementing main throttle valve of the steam-driven water-feeding pump are quickly turned off, and the steam-driven water-feeding pump is tripped. Tripping is also possible because foreign matter enters the feed pump interior, causing it to trip.

However, the existing control devices have the following disadvantages in use, such as;

the filter screen is inconvenient to clean or replace, and the filter screen of the existing control device is inconvenient to clean or replace in use, so that the filter screen is inconvenient to use.

We have therefore proposed a thermal power plant turbine feed pump trip control apparatus to address the problems set forth above.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a steam turbine feed pump trip control device of thermal power plant to solve above-mentioned background art and propose inconvenient washing or changing the filter screen, current control device in use is inconvenient washs or changes its filter screen, thereby in use is convenient problem inadequately.

In order to achieve the above object, the utility model provides a following technical scheme: the utility model provides a steam turbine feed pump trip control device of thermal power plant, includes feed pump main part, installation base, solenoid valve, first water pipe and spring, feed pump main part lower extreme is provided with the installation base, be provided with the solenoid valve in the feed pump main part, the feed pump main part outside is connected with first water pipe, the first water pipe outside is connected with the filter tube upper end, the filter tube upper end outside is connected with the second water pipe, be provided with the filter on the filter tube upper end, filter tube upper end lower extreme is provided with the filter tube lower extreme, and is provided with the transparent plate on the filter tube lower extreme, the shifting chute has been seted up on the filter plate, the insertion groove has been seted up on the filter tube upper end, be provided with the gag lever post on the filter plate, and the gag lever post outside is connected with the carriage release lever, filter internally mounted has the spring.

Preferably, the connection mode of the first water pipe and the upper end of the filter pipe is in threaded connection, the connection mode of the upper end of the filter pipe and the second water pipe is in threaded connection, and the second water pipe is located at the lower end of the filter plate.

Preferably, the connection mode of the filter plate and the upper end of the filter pipe is detachable connection, the connection mode of the filter plate and the limiting rod is movably connected, and the limiting rod forms a moving structure on the filter plate.

Preferably, the connection mode of the lower end of the filter pipe and the upper end of the filter pipe is in threaded connection, the connection mode of the lower end of the filter pipe and the transparent plate is in fixed connection, and the number of the transparent plates on the lower end of the filter pipe is two.

Preferably, the connecting mode of the limiting rod and the upper end of the filter pipe is in contact connection, the limiting rod forms a moving structure on the upper end of the filter pipe, and the number of the limiting rods on the filter plate is two.

Preferably, the movable rod is fixedly connected with the limit rod, and the movable rod forms a movable structure on the filter plate.

Compared with the prior art, the beneficial effects of the utility model are that: the trip control device of the steam turbine feed pump of the thermal power plant;

can filter water through the filter to prevent that inside impurity of water from entering into inside the water-feeding pump, lead to it to take place the tripping operation, and impurity after filtering will fall to the filter tube lower extreme, can conveniently observe through the transparent plate, thereby decide whether clear up, make its convenient use, and the accessible removes the pole and removes the gag lever post, make it dismantle and install the filter, thereby conveniently wash or change the filter, thereby convenient to use.

Drawings

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

FIG. 2 is a schematic view of the connection structure of the upper end and the lower end of the filtering pipe of the present invention;

fig. 3 is a schematic structural diagram of a portion a in fig. 1 according to the present invention.

In the figure: 1. a water feed pump main body; 2. installing a base; 3. an electromagnetic valve; 4. a first water pipe; 5. the upper end of the filter pipe; 6. a second water pipe; 7. a filter plate; 8. the lower end of the filter pipe; 9. a transparent plate; 10. a moving groove; 11. inserting the groove; 12. a limiting rod; 13. a travel bar; 14. a spring.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides a technical solution: a trip control device for a steam turbine feed pump of a thermal power plant comprises a feed pump main body 1, a mounting base 2, an electromagnetic valve 3, a first water pipe 4, a filter pipe upper end 5, a second water pipe 6, a filter plate 7, a filter pipe lower end 8, a transparent plate 9, a movable groove 10, an insertion groove 11, a limiting rod 12, a movable rod 13 and a spring 14, wherein the mounting base 2 is arranged at the lower end of the feed pump main body 1, the electromagnetic valve 3 is arranged on the feed pump main body 1, the first water pipe 4 is connected to the outer side of the feed pump main body 1, the filter pipe upper end 5 is connected to the outer side of the first water pipe 4, the second water pipe 6 is connected to the outer side of the filter pipe upper end 5, the filter plate 7 is arranged on the filter pipe upper end 5, the filter pipe lower end 8 is arranged at the lower end of the filter pipe, the transparent plate 9 is arranged on the filter pipe lower end 8, the movable groove 10 is arranged on the filter plate 7, the filter pipe upper end 5 is provided with the insertion groove 11, a limiting rod 12 is arranged on the filter plate 7, a moving rod 13 is connected to the outer side of the limiting rod 12, and a spring 14 is arranged inside the filter plate 7.

First water pipe 4 is threaded connection with the connected mode of filter pipe upper end 5, and filter pipe upper end 5 is threaded connection with the connected mode of second water pipe 6, and second water pipe 6 is in the lower extreme of filter 7, the connected mode of first water pipe 4 and filter pipe upper end 5 is convenient to be dismantled filter pipe upper end 5, make it conveniently use, and the position design of second water pipe 6, when making second water pipe 6 carry water to first water pipe 4, need pass through the filtration of filter 7, thereby can prevent it from taking place the trip.

The connection mode of filter 7 and filter tube upper end 5 is for dismantling the connection, and the connection mode of filter 7 and gag lever post 12 is swing joint, and gag lever post 12 constitutes removal structure on filter 7, filter 7 conveniently makes filter 7 can dismantle with filter tube upper end 5's connection mode, thereby conveniently wash or change the filter screen, make its filter effect better, prevent that it from influencing the work and using, and filter 7 makes gag lever post 12 can remove on filter 7 with gag lever post 12's connection mode, thereby can be spacing filter 7, make it conveniently install.

The connected mode of filter tube lower extreme 8 and filter tube upper end 5 is threaded connection, and the connected mode of filter tube lower extreme 8 and transparent plate 9 is fixed connection, and the number of transparent plate 9 on filter tube lower extreme 8 is provided with two, filter tube lower extreme 8 is convenient to be dismantled filter tube lower extreme 8 with the connected mode of filter tube upper end 5, make its impurity that conveniently filters 7, make its convenient use, and the connected mode of filter tube lower extreme 8 and transparent plate 9 conveniently makes transparent plate 9 and filter tube lower extreme 8 be connected more firm, thereby conveniently observe its inside condition through transparent plate 9, thereby facilitate the use.

The connecting mode of gag lever post 12 and filter tube upper end 5 is connected for the contact, and gag lever post 12 constitutes removal structure on filter tube upper end 5 to gag lever post 12 number on filter 7 is provided with two, and gag lever post 12 conveniently makes gag lever post 12 remove on filter tube upper end 5 with the connecting mode of filter tube upper end 5, thereby conveniently dismantles filter 7, makes its convenient use.

The connecting mode of the moving rod 13 and the limiting rod 12 is fixed connection, the moving rod 13 forms a moving structure on the filter plate 7, and the connecting mode of the moving rod 13 and the limiting rod 12 enables the moving rod 13 and the limiting rod 12 to be more stably connected, so that falling off of the moving rod 13 and the limiting rod 12 is prevented.

The working principle is as follows: when the tripping control device for the steam turbine feed pump of the thermal power plant is used, firstly, the integrity of the device is checked, then the device is transported to a corresponding working position, and when a single electromagnetic valve 3 is powered off in the existing two-out-of-four mode, a safety oil drainage oil path is not conducted, and the steam pump is not tripped. When at least one of the two groups of electromagnetic valves 3 is powered off, the whole safety oil drainage path is conducted, after pressure relief, a main throttle valve of the steam-driven water-feeding pump and a main steam-supplementing valve of the steam-driven water-feeding pump are quickly closed, the steam-driven water-feeding pump is tripped, and when water is pumped through the second water pipe 6, the water is filtered through the filter plate 7, impurities in water are prevented from entering the water-feeding pump and tripping is caused, the filtered impurities fall to the lower end 8 of the filter pipe, whether cleaning is needed or not is observed through the transparent plate 9, the movable rod 13 can be pulled during cleaning, and the filter plate 7 can be detached and conveniently cleaned.

Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a steam turbine of thermal power plant water feed pump tripping control device, includes water feed pump main part (1), installation base (2), solenoid valve (3), first water pipe (4) and spring (14), its characterized in that: the lower end of the water feeding pump main body (1) is provided with a mounting base (2), the water feeding pump main body (1) is provided with an electromagnetic valve (3), the outer side of the feed pump main body (1) is connected with a first water pipe (4), the outer side of the first water pipe (4) is connected with the upper end (5) of a filter pipe, the outer side of the upper end (5) of the filter pipe is connected with a second water pipe (6), the upper end (5) of the filter pipe is provided with a filter plate (7), the lower end of the upper end (5) of the filter pipe is provided with a lower end (8) of the filter pipe, a transparent plate (9) is arranged on the lower end (8) of the filter pipe, a moving groove (10) is arranged on the filter plate (7), an insertion groove (11) is arranged on the upper end (5) of the filter pipe, a limiting rod (12) is arranged on the filter plate (7), and the outer side of the limiting rod (12) is connected with a movable rod (13), and a spring (14) is arranged inside the filter plate (7).

2. The trip control device for the turbine feed pump of the thermal power plant as claimed in claim 1, wherein: the connection mode of the first water pipe (4) and the upper end (5) of the filter pipe is in threaded connection, the connection mode of the upper end (5) of the filter pipe and the second water pipe (6) is in threaded connection, and the second water pipe (6) is located at the lower end of the filter plate (7).

3. The trip control device for the turbine feed pump of the thermal power plant as claimed in claim 1, wherein: the filter (7) is detachably connected with the upper end (5) of the filter pipe, the filter (7) is movably connected with the limiting rod (12), and the limiting rod (12) forms a moving structure on the filter (7).

4. The trip control device for the turbine feed pump of the thermal power plant as claimed in claim 1, wherein: the connection mode of filter tube lower extreme (8) and filter tube upper end (5) is threaded connection, and the connection mode of filter tube lower extreme (8) and transparent plate (9) is fixed connection to the number of transparent plate (9) on filter tube lower extreme (8) is provided with two.

5. The trip control device for the turbine feed pump of the thermal power plant as claimed in claim 1, wherein: the limiting rod (12) is in contact connection with the upper end (5) of the filter pipe, the limiting rod (12) forms a moving structure on the upper end (5) of the filter pipe, and the number of the limiting rods (12) on the filter plate (7) is two.

6. The trip control device for the turbine feed pump of the thermal power plant as claimed in claim 1, wherein: the movable rod (13) is fixedly connected with the limiting rod (12), and the movable rod (13) forms a movable structure on the filter plate (7).