CN210948810U

CN210948810U - High door regulating device for main steam regulating system of steam turbine

Info

Publication number: CN210948810U
Application number: CN201921242643.1U
Authority: CN
Inventors: 王世宏; 张建伟; 安升; 朱云上; 王彦琛; 罗宾; 王雪飞; 候飞
Original assignee: Suzhou Industrial Park Blue Sky Gas Thermal Power Co ltd
Current assignee: Suzhou Industrial Park Blue Sky Gas Thermal Power Co ltd
Priority date: 2019-08-02
Filing date: 2019-08-02
Publication date: 2020-07-07
Anticipated expiration: 2029-08-02

Abstract

The utility model discloses a turbine owner steam governing system is with high valve gear, including high valve disk seat, case and valve barrel, the high valve disk seat is the I shape structure, the inside case that is equipped with of high valve disk seat, the bottom zonulae occludens valve barrel of high valve disk seat have seted up two through-flow holes at the well upper portion symmetry of valve barrel, and its effect is the air leakage volume that increases case and valve barrel clearance. The beneficial effects of the utility model are that, increase the steam leakage volume in high transfer valve case and valve barrel clearance through setting up the through-flow hole, high transfer door vibration is big and the abnormal sound when eliminating the unit rush, and the elimination equipment hidden danger guarantees that equipment safety and stability moves.

Description

High door regulating device for main steam regulating system of steam turbine

Technical Field

The utility model belongs to the power generation facility field, specifically speaking are a high door regulating device is used to steam turbine main steam governing system.

Background

The high-speed regulating valve is characterized by that when the steam turbine is rushed to rotate, the high-speed regulating valve is opened, and when the main valve is not yet operated, the pre-opened valve is previously operated, and after it is opened, the small-flow steam can be passed through the pre-opened valve core and reached to the main valve so as to reduce the front-rear pressure difference of main valve, and is favorable for smoothly opening main valve. The pre-opening valve is positioned in the valve core of the main steam valve, the valve core of the pre-opening valve is directly connected to the valve rod of the main steam valve, the pre-opening valve is opened firstly after the hydraulic motor of the main steam valve starts to act, and the main steam valve is driven by the valve rod to be opened gradually after the pre-opening valve is opened completely.

When the high-speed regulating valve is opened during the impulse rotation of the steam turbine, the vibration of the regulating valve is large and abnormal sound exists, the steam leakage quantity of the gap between the high-speed regulating valve core and the valve sleeve is small, the flow of the pre-opening valve is not enough to control the lifting rotating speed, the flow of the main valve is overlarge when the main valve is opened, the abnormal sound is caused by the reciprocating opening and closing of the main valve, and the main valve and the pre-opening valve are easily damaged after a long time.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide an increase high transfer door valve core and valve barrel clearance steam leakage volume, eliminate the turbine main steam governing system of the big and abnormal sound problem of high transfer door vibration when unit dashes to change and use high transfer door gear. In order to solve the problem, the utility model adopts the following technical scheme:

the utility model provides a steam turbine owner steam governing system is with high valve gear, includes high valve disk seat, case and valve barrel, the high valve disk seat is I shape structure, the inside case that is equipped with of high valve disk seat, the bottom zonulae occludens valve barrel of high valve disk seat have seted up two through-flow holes in the well upper portion symmetry of valve barrel, and its effect is the air leakage volume that increases case and valve barrel clearance.

Furthermore, the distance between the through-flow hole and the top end of the valve sleeve is 100-110mm, and the diameter of the through-flow hole is 10-15 mm.

The beneficial effects of the utility model are that, increase the steam leakage volume in high transfer valve case and valve barrel clearance through setting up the through-flow hole, high transfer door vibration is big and the abnormal sound when eliminating the unit rush, and the elimination equipment hidden danger guarantees that equipment safety and stability moves.

Drawings

The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention, and together with the description serve to explain the invention and not to limit the invention. In the drawings:

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

fig. 2 is a sectional view taken along line a-a of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in conjunction with the accompanying drawings, and it will be understood that they are presented herein only to illustrate and explain the present invention, and not to limit the present invention.

As shown in fig. 1-2, a high valve adjusting device for a main steam adjusting system of a steam turbine comprises a high valve seat 1, a valve core 2 and a valve sleeve 3, wherein the high valve seat 1 is of an i-shaped structure, the valve core 2 is arranged inside the high valve seat 1, the bottom of the high valve seat 1 is tightly connected with the valve sleeve 3, two through-flow holes 31 are symmetrically formed in the middle upper part of the valve sleeve 3, and the function of the high valve adjusting device is to increase air leakage in a gap between the valve core 2 and the valve sleeve 3.

The distance h between the through-flow hole 31 and the top end of the valve sleeve 3 is 105mm, and the diameter of the through-flow hole 31 is 13 mm.

The steam leakage amount of the clearance between the valve core 2 and the valve sleeve 3 is increased by arranging the through-flow hole 31, the vibration and abnormal sound of the high-speed governing valve during the flushing rotation of the unit are eliminated, the hidden danger of equipment is eliminated, and the safe and stable operation of the equipment is ensured.

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 described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The utility model provides a steam turbine main steam governing system is with high valve gear, includes high valve disk seat, case and valve barrel, characterized by: the high-pressure regulating valve is characterized in that the valve seat of the high-pressure regulating valve is of an I-shaped structure, the valve core is arranged inside the valve seat of the high-pressure regulating valve, the bottom of the valve seat of the high-pressure regulating valve is tightly connected with the valve sleeve, two through-flow holes are symmetrically formed in the middle upper portion of the valve sleeve, and the air leakage amount of the gap between the valve core and the valve sleeve is increased.

2. The high governor apparatus for a main steam conditioning system of a steam turbine of claim 1, wherein: the distance between the through-flow hole and the top end of the valve sleeve is 100-110mm, and the diameter of the through-flow hole is 10-15 mm.