CN215718989U

CN215718989U - Steam turbine high-speed governor door rod steam-dredging structure

Info

Publication number: CN215718989U
Application number: CN202120646285.1U
Authority: CN
Inventors: 席海斌; 蒋都盛
Original assignee: Shanghai Shidongkou First Power Plant of Huaneng Power International Inc
Current assignee: Shanghai Shidongkou First Power Plant of Huaneng Power International Inc
Priority date: 2021-03-30
Filing date: 2021-03-30
Publication date: 2022-02-01
Anticipated expiration: 2031-03-30

Abstract

The utility model relates to a high-adjustment door rod steam-discharging structure of a main engine of a power plant, which comprises a door rod steam-discharging pipe, a high-exhaust pipeline, a connecting pipe, a four-pumping reverse-flow water pipe and a door rod steam-discharging four-pumping isolation valve, wherein a blocking part is arranged between the door rod steam-discharging pipe and the high-exhaust pipeline, one end of the connecting pipe is connected with the door rod steam-discharging pipe, the other end of the connecting pipe is connected with the four-pumping reverse-flow water pipe, and the door rod steam-discharging four-pumping isolation valve is arranged on the connecting pipe.

Description

Steam turbine high-speed governor door rod steam-dredging structure

Technical Field

The utility model relates to the field of main engine high-pressure regulating doors of power plants, in particular to a steam turbine high-pressure regulating door rod steam-dredging structure.

Background

The steam turbine converts the heat energy of high-temperature steam into mechanical energy rotating at high speed, drives a generator to cut magnetic lines of force and then converts the magnetic lines of force into electric energy, a high-pressure regulating valve of the steam turbine belongs to a continuous control type actuating mechanism, the high-pressure regulating valve can be controlled at any position, the steam inlet quantity is proportionally regulated to meet the operation requirement of the steam turbine, different opening degrees of the regulating valve of the steam turbine correspond to different rotating speeds before a steam turbine generator set is heavily loaded, the steam inlet quantity is large when the opening degree is large, and the corresponding rotating speed is high.

In the prior art, a steam drainage pipeline of a high-pressure side gate rod of a main machine of a steam turbine unit is normally connected to the front of a high-exhaust check valve, and the steam leakage amount of the high-pressure side gate rod of the main machine of the steam turbine unit is large and the pressure of high exhaust steam is high, so that the steam drainage of the high-pressure side gate rod is not smooth when the unit operates, and a large amount of heat is lost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects in the prior art and provide a steam-dredging structure for a high-speed regulating valve rod of a steam turbine.

The purpose of the utility model can be realized by the following technical scheme:

the utility model provides a power plant host computer height-adjusting door pole steam phobic structure, dredges contrary water pipe and four isolated valves of taking out including door pole steam phobic pipe, high calandria way, connecting pipe, four, door pole steam phobic pipe and high calandria way between set up and block, connecting pipe one end and door pole steam phobic union coupling, the other end is connected to four and takes out contrary water pipe, door pole steam phobic four take out isolated valve and set up on the connecting pipe.

Furthermore, the door bar steam-discharging pipe comprises a first door bar steam-discharging pipe and a second door bar steam-discharging pipe, wherein the first door bar steam-discharging pipe and the second door bar steam-discharging pipe are respectively disconnected with the high-level discharge pipeline and are connected to the connecting pipe after being communicated with each other.

Furthermore, the first door lever steam exhaust pipe and the second door lever steam exhaust pipe are four door lever steam exhaust pipelines on two sides of the height-adjusting door respectively.

Preferably, the valve rod steam-drainage four-pumping isolation valve is a manual stop valve.

Preferably, the interface of the high-level discharge pipeline leading to the steam drain pipe of the door stem is blocked by the steam drain pipe of the door stem through stifling.

Furthermore, an extraction pipeline is arranged in front of the four extraction reverse water pipes, and the connecting pipe is connected with the extraction pipeline.

Furthermore, the structure also comprises a drain pipe, wherein the drain pipe is arranged at the rising part of the connecting pipe and is connected to the low expansion tank.

Furthermore, a steam-discharging drain valve of a gate rod is arranged on the drain pipe.

Still further preferably, the valve rod steam trap is a manual stop valve.

Furthermore, a four-pumping reverse valve is arranged on the four-pumping reverse water pipe.

Compared with the prior art, the utility model has the following advantages:

1) according to the utility model, the steam-draining pipe of the door rod originally connected to the high-pressure pipeline is connected to the four-extraction reverse-flow pipeline with relatively low pressure, so that the smooth steam-draining of the high-pressure door rod is ensured, and the heat can be utilized, thus the use safety and reliability are improved, the heat efficiency is high, the loss degree of the high-pressure door rod can be reduced, the service life is prolonged, and the maintenance is facilitated;

2) according to the utility model, the interface of the high-level pipeline leading to the door stem steam exhaust pipe is blocked by the door stem steam exhaust pipe through the stuffy plug, the original connection structure at the high-level pipeline is not required to be changed, and the construction is convenient.

Drawings

FIG. 1 is a schematic diagram of a prior art piping structure;

fig. 2 is a schematic view of the piping structure of the present invention.

Wherein: 1. door pole steam trap, 11, first door pole steam trap, 12, second door pole steam trap, 2, high row's pipeline, 3, connecting pipe, 4, four take out and remove the contrary water pipe, 5, door pole steam trap four take out isolated valve, 6, steam extraction pipeline, 7, drain pipe, 8, door pole steam trap, 9, four take out and remove contrary valve, 10, the low case that expands.

Detailed Description

The utility model is described in detail below with reference to the figures and specific embodiments.

Example (b):

as shown in fig. 1, the utility model provides a high-adjustment door rod steam exhaust structure of a main engine of a power plant, which comprises a door rod steam exhaust pipe 1, a high exhaust pipeline 2, a connecting pipe 3, a four-extraction reverse-flow water pipe 4 and a door rod four-extraction isolation valve 5, wherein a blocking part is arranged between the door rod steam exhaust pipe 1 and the high exhaust pipeline 2, one end of the connecting pipe 3 is connected with the door rod steam exhaust pipe 1, the other end of the connecting pipe is connected with the four-extraction reverse-flow water pipe 4, and the door rod four-extraction isolation valve 5 is arranged on the connecting pipe 3.

The door bar steam exhaust pipe 1 comprises a first door bar steam exhaust pipe 11 and a second door bar steam exhaust pipe 12, the first door bar steam exhaust pipe 11 and the second door bar steam exhaust pipe 12 are respectively disconnected with the high exhaust pipeline 2, and are connected to the connecting pipe 3 after being communicated with each other. The first door lever steam exhaust pipe 11 and the second door lever steam exhaust pipe 12 are four door lever steam exhaust pipelines on two sides of the height-adjustable door respectively.

A steam extraction pipeline 6 is arranged in front of the four-extraction reverse water pipe 4, the connecting pipe 3 is connected with the steam extraction pipeline 6, and a four-extraction reverse valve 9 is arranged on the four-extraction reverse water pipe 4. The utility model also comprises a drain pipe 7, wherein the drain pipe 7 is arranged at the rising part of the connecting pipe 6 and is connected to the low expansion tank 10, and a gate rod steam-draining drain valve 8 is arranged on the drain pipe 7.

In the embodiment, the gate-rod steam-drainage four-pumping isolation valve 5 and the gate-rod steam-drainage steam trap 8 both adopt manual stop valves, and the interface of the high-drainage pipeline 2 leading to the gate-rod steam-drainage pipe 1 is blocked by the gate-rod steam-drainage pipe 1 through stuffy block.

The principle of the utility model is as follows: original high pressure side door pole steam trap pipeline of steam turbine connects before the high exhaust check valve, because the pressure of the great and high steam extraction of high throttle door pole steam leakage volume is higher, thereby it is not smooth to lead to high throttle door pole steam trap when the unit moves, lose a large amount of heats simultaneously, when changing it to connect to take out when removing contrary pipeline to the four that pressure is lower relatively, the door pole receives the pressure less with assaulting, the opening and close of door pole is more smooth and easy, the steam trap is also more unobstructed, can this part heat of more efficient utilization.

While the utility model has been described with reference to specific embodiments, the utility model is not limited thereto, and those skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope of the utility model. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a power plant host computer height-adjusting door pole steam trap structure, its characterized in that, take out contrary water pipe (4) and four isolated valves (5) of taking out of door pole steam trap (1), high calandria (2), connecting pipe (3), four, door pole steam trap set up between contrary water pipe (4) and the high calandria (2) and block, connecting pipe (3) one end be connected with door pole steam trap (1), the other end is connected to four and takes out contrary water pipe (4), door pole steam trap four take out isolated valves (5) and set up on connecting pipe (3).

2. The power plant main machine high-regulation door-rod steam distribution structure of claim 1, characterized in that the door-rod steam distribution pipe (1) comprises a first door-rod steam distribution pipe (11) and a second door-rod steam distribution pipe (12), and the first door-rod steam distribution pipe (11) and the second door-rod steam distribution pipe (12) are respectively disconnected from the high-row pipeline (2) and connected to the connecting pipe (3) after being communicated with each other.

3. The steam exhaust structure of the door lever of the main engine high-speed governing door of the power plant as claimed in claim 2, wherein the first door lever steam exhaust pipe (11) and the second door lever steam exhaust pipe (12) are four door lever steam exhaust pipelines on two sides of the high-speed governing door respectively.

4. The steam release structure of the door lever of the main engine high-pressure regulating door of the power plant as claimed in claim 1, characterized in that the four-pumping isolation valve (5) is a manual stop valve.

5. The power plant main unit high-regulation door rod steam exhaust structure of claim 1, characterized in that the interface of the high-discharge pipeline (2) to the door rod steam exhaust pipe (1) is blocked from the door rod steam exhaust pipe (1) through stifling.

6. The steam exhaust structure of the door rod of the main engine high-pressure regulating door of the power plant as claimed in claim 1, wherein a steam extraction pipeline (6) is arranged in front of the four-extraction reverse water pipe (4), and the connecting pipe (3) is connected with the steam extraction pipeline (6).

7. The steam exhaust structure of the door rod of the main engine high-pressure gate of the power plant as claimed in claim 6, characterized in that the structure further comprises a drain pipe (7), wherein the drain pipe (7) is arranged at the rising part of the connecting pipe (6) and is connected to the low expansion tank (10).

8. The steam exhaust structure of the door lever of the main engine high-regulation door of the power plant as claimed in claim 7, characterized in that the steam exhaust pipe (7) is provided with a steam exhaust steam trap (8).

9. The steam trap structure of the door lever of the main engine high-pressure regulating door of the power plant as claimed in claim 8, wherein the steam trap (8) is a manual stop valve.

10. The steam exhaust structure of the door rod of the main engine high-pressure regulating door of the power plant as claimed in claim 1, wherein a four-extraction check valve (9) is arranged on the four-extraction check water pipe (4).