CN214889058U

CN214889058U - Novel medium-pressure main steam regulating valve

Info

Publication number: CN214889058U
Application number: CN202121184071.3U
Authority: CN
Inventors: 宫相臣; 贾英国; 郭慧; 任蕾; 马鑫
Original assignee: BEIJING BEIZHONG STEAM TURBINE GENERATOR CO LTD
Current assignee: BEIJING BEIZHONG STEAM TURBINE GENERATOR CO LTD
Priority date: 2021-05-28
Filing date: 2021-05-28
Publication date: 2021-11-26
Anticipated expiration: 2031-05-28

Abstract

The utility model provides a novel medium pressure main vapour governing valve, which comprises a valve body, the steam inlet end of valve body is equipped with the main vapour valve that the level set up, the play vapour end of main vapour valve is equipped with the first governing valve of vertical setting, first governing valve is kept away from one side of main vapour valve is equipped with the second governing valve of vertical setting, the second governing valve includes the valve gap and vertical running through the valve rod of valve gap, the one end and the power device of valve rod are connected, and the other end is connected with the valve disc, be equipped with on the valve body with the disk seat that the valve disc corresponds, be connected with out the steam pipe on the disk seat, the valve disc is inside hollow tubular structure, the utility model discloses can load control under low operating load is stable and reduce the valve vibration.

Description

Novel medium-pressure main steam regulating valve

Technical Field

The utility model belongs to the technical field of the medium pressure governing valve technique and specifically relates to a novel medium pressure main vapour governing valve is related to.

Background

In recent years, due to the requirements of energy conservation and environmental protection and the limitation of power utilization capacity of users, a 300 MW-grade thermal power generator set is required to be matched with deep peak regulation, during deep peak regulation, the operation load needs to be controlled within the range of 120MW-135MW, during small-load operation, in order to maintain steam supply parameters, the opening degree of a medium-pressure regulating valve needs to be controlled within a smaller range, and through some power plant practices, during heat supply and steam extraction within the range, the conditions of unstable load control and valve vibration occur, and safe operation cannot be realized.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a novel medium-pressure main steam regulating valve which can realize stable load control and reduce valve vibration under low operation load;

the utility model provides a novel medium pressure main vapour governing valve, which comprises a valve body, the steam inlet end of valve body is equipped with the main vapour valve that the level set up, the play vapour end of main vapour valve is equipped with the first governing valve of vertical setting, first governing valve is kept away from one side of main vapour valve is equipped with the second governing valve of vertical setting, the second governing valve includes the valve gap and vertical runs through the valve rod of valve gap, the one end and the power device of valve rod are connected, and the other end is connected with the valve disc, be equipped with on the valve body with the disk seat that the valve disc corresponds, be connected with out the steam pipe on the disk seat, the valve disc is inside hollow tubular structure.

In a preferred embodiment, one end of the valve cover, which is close to the valve seat, is provided with a positioning sleeve for accommodating the valve disc, and the inner wall of the positioning sleeve is provided with a sealing device for sealing a gap between the positioning sleeve and the valve disc.

In a preferred embodiment, a steam inlet is arranged between the positioning sleeve and the valve seat, and the inner wall of the valve body at the steam inlet is obliquely arranged to enable fluid in the valve body to enter the steam inlet along an obliquely upward direction.

In a preferred embodiment, the angle of inclination of the inner wall of the valve body at the steam inlet is 40 ° to 55 °.

In a preferred embodiment, the portion of the valve cover extending into the valve body has a diameter of 200mm to 250 mm.

In a preferred embodiment, the valve stem has a diameter of 80mm to 100 mm.

In a preferred embodiment, the power device is a servomotor, and the servomotor drives the valve rod to move up and down along the valve cover so as to drive the valve disc to open or close the steam inlet.

In a preferred embodiment, a return spring sleeved outside the valve rod is arranged in the positioning sleeve.

The utility model has the advantages that:

1. a second regulating valve is arranged on the basis of the original main steam valve and the original first regulating valve, so that the stability of the load is further controlled;

2. the valve disc is a cylinder body with a hollow interior, the hollow interior is higher in height and far away from a steam flow excitation point, so that the acting force of the excitation point is gradually reduced and then acts on the valve disc, and the influence of the steam flow on the valve disc when the valve is at a low opening degree is reduced;

3. the inner wall of the valve body at the steam inlet is obliquely arranged, so that the impact of steam flow on a valve disc is reduced;

4. the diameter of the part of the valve cover extending into the valve body is 200mm-250mm, the diameter of the valve cover is reduced, the opening degree of the second regulating valve is increased, the flow is increased, and meanwhile the stability of the second regulating valve is increased;

5. the diameter of the valve rod is 80mm-100mm, the diameter of the valve rod is increased, and the inherent frequency value of the movable component is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a top cross-sectional view of the present invention;

description of reference numerals:

1. a valve body; 2. a main steam valve; 3. a main steam valve disc; 4. a first regulating valve; 5. a first regulator valve disc; 6. a first steam outlet pipe; 7. a second regulating valve; 8. a valve stem; 9. a valve cover; 10. a valve disc; 11. a steam inlet; 12. a valve seat; 13. a steam outlet pipe; 14. and (7) sealing the device.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. 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.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

As shown in fig. 1, the utility model provides a novel medium pressure main steam governing valve, including valve body 1, valve body 1 is the barrel that the level set up, the steam inlet end of valve body 1 is equipped with the main steam valve 2 that the level set up, place the both sides of steam turbine set middling pressure module for the level, belong to horizontal valve, valve rod and servomotor are horizontal installation, the play steam end of main steam valve 2 is equipped with the first governing valve 4 of vertical setting, leave the passageway that supplies the fluid to pass through between the side of first governing valve 4 and the valve body 1, the play steam end of first governing valve 4 is equipped with first

play steam pipe

6, 2 imports of main steam valve and first governing valve 4 export respectively with the reheat pipeline, the steam inlet of intermediate pressure jar is connected.

One side that main steam valve 2 was kept away from to first governing valve 4 is equipped with second governing valve 7 of vertical setting, second governing valve 7 includes valve gap 9 and the vertical valve rod 8 that runs through valve gap 9, the one end and the power device of valve rod 8 are connected, power device drives vertical motion about the valve rod 8, the other end is connected with valve disc 10, be equipped with the disk seat 12 that corresponds with valve disc 10 on the valve body 1, be connected with out steam pipe 13 on the disk seat 12, valve disc 10 is inside hollow tubular structure, inside hollow height is higher, keep away from the steam flow excitation point, the effort that makes the excitation point reduces gradually on the back reappearance valve disc, reduce the influence of steam flow to valve disc.

The one end that valve gap 9 is close to disk seat 12 is equipped with the position sleeve that is used for holding valve disc 10, and the opening that the top of position sleeve passes through for supplying valve disc 10, and the bottom is for supplying valve rod 8 to pass through and the diameter is less than open-top's through-hole, be equipped with on the inner wall of position sleeve and be used for sealing the sealing device 14 in gap between position sleeve and the valve disc 10, sealing device 14 is the sealing washer.

An air inlet 11 is arranged between the positioning sleeve and the valve seat 12, the recent direction of the air inlet 11 faces the first regulating valve 4, and the inner wall of the valve body at the air inlet 11 is obliquely arranged to enable fluid in the valve body 1 to enter the air inlet 11 along the oblique upward direction, so that the impact of air flow on the valve disc 10 is reduced.

The inclination angle of the inner wall of the valve body 1 at the steam inlet 11 is 40-55 degrees.

The diameter of the part of the valve cover 9 extending into the valve body 1 is 200mm-250 mm. One end of the valve cover 9 extends into the valve body 1, a steam inlet 11 is formed between the top and the valve seat 12 arranged on the valve body 1, the valve cover of the existing regulating valve extends into the valve body, the diameter of the valve cover is larger, and therefore the opening degree of the regulating valve is smaller, for example: the diameter of the valve cover of the first regulating valve 4 is 355mm, and the opening degree of the second regulating valve 7 is increased by reducing the diameter of the valve cover 9 of the second regulating valve 7, so that the stability of the second regulating valve 7 is increased while the flow is increased.

The diameter of the valve rod 8 is 80mm-100 mm. The diameter of valve rod is 50mm in current governing valve, in order to increase the stability of valve dish 10, reduces the vibrations of valve, with the diameter increase of valve rod 8, increases stability.

The power device is a servomotor, and the servomotor drives the valve rod 8 to move up and down along the valve cover 9 to drive the valve disc 10 to open or close the steam inlet 11.

The positioning sleeve is internally provided with a return spring sleeved outside the valve rod 8, the diameter of the return spring is larger than that of a through hole at the bottom of the positioning sleeve, the servomotor opens the valve under the pressure of the return spring, when the servomotor needs to be closed, the servomotor loses power, and the pressure of the return spring plays a role in closing the valve.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The utility model provides a novel medium-pressure main steam governing valve, includes the valve body, the steam inlet end of valve body is equipped with the main steam valve that the level set up, the play steam end of main steam valve is equipped with the first governing valve of vertical setting, a serial communication port, first governing valve is kept away from one side of main steam valve is equipped with the second governing valve of vertical setting, the second governing valve includes the valve gap and vertical runs through the valve rod of valve gap, the one end and the power device of valve rod are connected, and the other end is connected with the valve disc, be equipped with on the valve body with the disk seat that the valve disc corresponds, be connected with out the steam pipe on the disk seat, the valve disc is inside hollow tubular structure.

2. The novel medium-pressure main steam regulating valve as claimed in claim 1, wherein a positioning sleeve for accommodating the valve disc is arranged at one end of the valve cover close to the valve seat, and a sealing device for sealing a gap between the positioning sleeve and the valve disc is arranged on the inner wall of the positioning sleeve.

3. The novel medium-pressure main steam regulating valve as claimed in claim 2, wherein a steam inlet is arranged between the positioning sleeve and the valve seat, and the inner wall of the valve body at the steam inlet is obliquely arranged to enable fluid in the valve body to enter the steam inlet in an oblique upward direction.

4. The novel medium-pressure main steam regulating valve as claimed in claim 3, wherein the inclination angle of the inner wall of the valve body at the steam inlet is 40-55 °.

5. The new medium pressure main steam regulating valve as claimed in claim 1, wherein the diameter of the portion of the valve cover extending into the valve body is 200mm-250 mm.

6. The new medium pressure main steam regulating valve as claimed in claim 1, wherein the diameter of the valve stem is 80mm-100 mm.

7. The novel medium-pressure main steam regulating valve as claimed in claim 3, wherein the power device is a servomotor, and the servomotor drives the valve rod to move up and down along the valve cover so as to drive the valve disc to open or close the steam inlet.

8. The novel medium-pressure main steam regulating valve as claimed in claim 7, wherein a return spring sleeved outside the valve rod is arranged in the positioning sleeve.