阅读说明：本技术 内置滤网调节阀 (Built-in filter screen regulating valve ) 是由 吴昊 钱广 赵壮 崔秋雯 李海龙 于 2021-08-31 设计创作，主要内容包括：本发明的目的在于提供内置滤网调节阀,包括阀门壳体、阀头、导向套、法兰、蒸汽滤网,法兰安装在阀门壳体上部,阀门壳体下部设置阀座,蒸汽滤网通过阀座固定在阀门壳体里,法兰内部设置两段连续的中空,导向套伸入至两段连续的中空之中,阀头包括自上而下的阀杆段、连接段、套筒段,阀杆段位于导向套里并伸出至导向套外,连接段位于蒸汽滤网上方并与导向套相固连,套筒段在阀头关闭时套于蒸汽滤网外部,并与阀座形成密封。本发明过内置式滤网来改善调节阀调节特性以适应小流量及大流量调节,改善阀门减振降噪效果,从而避免了传统球形阀小开度时流速过高,噪声大,调节性能差等缺点。(The invention aims to provide a built-in filter screen regulating valve which comprises a valve shell, a valve head, a guide sleeve, a flange and a steam filter screen, wherein the flange is arranged at the upper part of the valve shell, a valve seat is arranged at the lower part of the valve shell, the steam filter screen is fixed in the valve shell through the valve seat, two sections of continuous hollow bodies are arranged inside the flange, the guide sleeve extends into the two sections of continuous hollow bodies, the valve head comprises a valve rod section, a connecting section and a sleeve section from top to bottom, the valve rod section is positioned in the guide sleeve and extends out of the guide sleeve, the connecting section is positioned above the steam filter screen and is fixedly connected with the guide sleeve, and the sleeve section is sleeved outside the steam filter screen when the valve head is closed and forms sealing with the valve seat. The invention improves the regulation characteristic of the regulating valve through the built-in filter screen to adapt to the regulation of small flow and large flow, and improves the vibration and noise reduction effect of the valve, thereby avoiding the defects of overhigh flow speed, high noise, poor regulation performance and the like when the traditional spherical valve is in small opening degree.)

1. Built-in filter screen governing valve, characterized by: including valve housing, the valve head, the uide bushing, the flange, the steam filter screen, the flange is installed on valve housing upper portion, valve housing lower part sets up the disk seat, the steam filter screen passes through the disk seat to be fixed in valve housing, the inside two sections continuous cavitys that set up of flange, the uide bushing stretches into among two sections continuous cavitys, the valve head includes top-down's valve rod section, the linkage segment, the cover section, the valve rod section is located the uide bushing and stretches out outside the uide bushing, the linkage segment is located steam filter screen top and links firmly mutually with the uide bushing, the cover is outside in steam filter screen when the valve head is closed, and form sealedly with the disk seat.

2. The internal screen regulator valve of claim 1, wherein: the valve seat is provided with an annular groove, the steam filter screen is provided with an annular bulge, and the steam filter screen is matched with the annular groove through the annular bulge so as to be fixed with the valve seat.

3. The internal screen regulator valve of claim 1, wherein: a first cavity is formed between the flange and the guide sleeve, an air exhaust passage is arranged in the flange, an air exhaust hole is arranged at the contact part of the flange and the first cavity, the air exhaust hole is connected with the air exhaust passage, the first cavity is communicated with the air exhaust passage through the air exhaust hole, and the end part of the air exhaust passage is higher than the valve shell.

4. The internal screen regulator valve of claim 1, wherein: the upper portion of steam filter screen sets up the window, and the middle part of steam filter screen sets up the aperture, forms the second cavity between the inside cavity of valve housing and flange, the valve head, and the valve housing of steam filter screen below forms the third cavity, and when the valve head was closed, window and aperture and second cavity disconnection, the valve head upwards opened the back, and aperture, window communicate the second cavity in proper order, and the second cavity passes through aperture and window intercommunication third cavity.

5. The internal screen regulator valve of claim 1, wherein: when the valve head is closed, the valve head adopts a spherical valve structure form to be grinded and sealed with the valve seat.

6. The internal screen regulator valve of claim 1, wherein: the steam filter screen is arranged on the valve seat in an interference manner through a spigot.

7. The internal screen regulator valve of claim 1, wherein: when the valve head is closed, the valve head is tightly attached to the valve seat, when the valve head is opened, the valve head moves upwards, steam in the first chamber is discharged from the air exhaust hole, the valve head is gradually opened, the steam enters the third chamber from the second chamber through the window and the small hole and reaches the nozzle, and when the built-in filter screen regulating valve is completely opened, the end face of the flange is in contact with the valve head for limiting; when the valve head is closed, the valve sealing line is positioned in the middle, the stress area of the convex shoulder of the guide sleeve is larger than the stress on the inner side of the valve head sealing line, the valve is sealed by steam, when the valve head is opened, the effective stress area of the valve head is the same as the stress area of the convex shoulder of the guide sleeve, the lifting steam force is zero, and the lifting force is the gravity of the valve head.

Technical Field

The invention relates to a valve, in particular to a valve of a marine steam turbine auxiliary machine.

Background

At present, most of ship steam turbine auxiliary machines adopt structural forms such as ball valves and pear-shaped valves, and the valves mainly have the following defects when used: when the working condition and the pressure ratio are low, the opening of the valve is small, the flow speed is too high, the noise is increased, and the current requirements of vibration and noise reduction of the ship are seriously influenced; because the auxiliary valve is smaller, the form of a load relief valve cannot be adopted, and the lifting force of the valve is larger.

Disclosure of Invention

The invention aims to provide a built-in filter screen regulating valve which can improve the vibration and noise reduction effects, thereby avoiding the defects of overhigh flow rate, high noise, poor regulating performance and the like when the traditional ball valve is in small opening.

The purpose of the invention is realized as follows:

the invention relates to a built-in filter screen regulating valve, which is characterized in that: including valve housing, the valve head, the uide bushing, the flange, the steam filter screen, the flange is installed on valve housing upper portion, valve housing lower part sets up the disk seat, the steam filter screen passes through the disk seat to be fixed in valve housing, the inside two sections continuous cavitys that set up of flange, the uide bushing stretches into among two sections continuous cavitys, the valve head includes top-down's valve rod section, the linkage segment, the cover section, the valve rod section is located the uide bushing and stretches out outside the uide bushing, the linkage segment is located steam filter screen top and links firmly mutually with the uide bushing, the cover is outside in steam filter screen when the valve head is closed, and form sealedly with the disk seat.

The present invention may further comprise:

1. the valve seat is provided with an annular groove, the steam filter screen is provided with an annular bulge, and the steam filter screen is matched with the annular groove through the annular bulge so as to be fixed with the valve seat.

2. A first cavity is formed between the flange and the guide sleeve, an air exhaust passage is arranged in the flange, an air exhaust hole is arranged at the contact part of the flange and the first cavity, the air exhaust hole is connected with the air exhaust passage, the first cavity is communicated with the air exhaust passage through the air exhaust hole, and the end part of the air exhaust passage is higher than the valve shell.

3. The upper portion of steam filter screen sets up the window, and the middle part of steam filter screen sets up the aperture, forms the second cavity between the inside cavity of valve housing and flange, the valve head, and the valve housing of steam filter screen below forms the third cavity, and when the valve head was closed, window and aperture and second cavity disconnection, the valve head upwards opened the back, and aperture, window communicate the second cavity in proper order, and the second cavity passes through aperture and window intercommunication third cavity.

4. When the valve head is closed, the valve head adopts a spherical valve structure form to be grinded and sealed with the valve seat.

5. The steam filter screen is arranged on the valve seat in an interference manner through a spigot.

6. When the valve head is closed, the valve head is tightly attached to the valve seat, when the valve head is opened, the valve head moves upwards, steam in the first chamber is discharged from the air exhaust hole, the valve head is gradually opened, the steam enters the third chamber from the second chamber through the window and the small hole and reaches the nozzle, and when the built-in filter screen regulating valve is completely opened, the end face of the flange is in contact with the valve head for limiting; when the valve head is closed, the valve sealing line is positioned in the middle, the stress area of the convex shoulder of the guide sleeve is larger than the stress on the inner side of the valve head sealing line, the valve is sealed by steam, when the valve head is opened, the effective stress area of the valve head is the same as the stress area of the convex shoulder of the guide sleeve, the lifting steam force is zero, and the lifting force is the gravity of the valve head.

The invention has the advantages that: the invention improves the regulation characteristic of the regulating valve through the built-in filter screen to adapt to the regulation of small flow and large flow, and improves the vibration and noise reduction effect of the valve, thereby avoiding the defects of overhigh flow speed, high noise, poor regulation performance and the like when the traditional spherical valve is in small opening degree.

Drawings

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

FIG. 2 is a schematic view of the fully open state of the present invention.

Detailed Description

The invention will now be described in more detail by way of example with reference to the accompanying drawings in which:

with reference to fig. 1-2, the invention relates to a built-in filter screen regulating valve, which comprises a valve shell, a valve head 1, a guide sleeve 2, a flange 3 and a steam filter screen 5, wherein the flange 3 is installed on the upper part of the valve shell, a valve seat 7 is arranged on the lower part of the valve shell, the steam filter screen 5 is fixed in the valve shell through the valve seat 7, two sections of continuous hollow are arranged inside the flange 3, the guide sleeve 2 extends into the two sections of continuous hollow, the valve head 1 comprises a valve rod section, a connecting section and a sleeve section from top to bottom, the valve rod section is positioned in the guide sleeve 2 and extends out of the guide sleeve 2, the connecting section is positioned above the steam filter screen 5 and is fixedly connected with the guide sleeve 2, and the sleeve section is sleeved outside the steam filter screen 5 when the valve head 1 is closed and forms a seal with the valve seat 7.

The lower part of the built-in filter screen 5 is adjusted by small holes which are uniformly arranged according to a certain rule, the upper part of the built-in filter screen 5 is adjusted by a window, and the size of the window is designed according to the maximum flow of an auxiliary machine;

the valve head 1 is in a spherical valve structure form and is in grinding seal with the valve seat 7;

the built-in filter screen 5 is arranged on the valve seat 7 in an interference manner in a spigot mode, and is locked by the locking plate 8;

the valve head 1 and the valve rod are integrated, in order to reduce the lifting force of the valve and increase the guide sleeve 2, the guide sleeve 2 is fixed with the sleeve through a screw and moves up and down together;

the invention adopts two-stage steam extraction, wherein the first-stage steam extraction is the steam extraction of the guide sleeve 2, and the second-stage steam extraction is the steam extraction of the valve rod;

as shown in fig. 1, the valve seat 7 is provided with an annular groove of a filter screen locking plate 8, the steam filter screen 5 is fixed with the valve seat 7 through the filter screen locking plate 8, the valve seat 7 is fixed with the valve shell through the valve seat locking plate 6, the valve head 1 is provided with a threaded hole, and the valve head 1 is fixed with the guide sleeve 2 through an inner hexagon screw 4.

The state is shown in figure 1 when this built-in filter screen governing valve is closed, and valve head 1 pastes with disk seat 7 tightly, and when opening the valve, valve head 1 upward movement, the interior steam of cavity B is discharged by aspirating hole C, air exhaust route A, and valve head 1 opens gradually, and steam enters into cavity F through cutoff hole E and reaches the nozzle by cavity D, and the operating condition when built-in filter screen governing valve is all opened is shown in figure 2, and the terminal surface of flange 3 contacts spacingly with valve head 1. Due to the built-in guide of the steam filter screen, the valve head is prevented from deflecting due to steam flowing, the valve head and the valve seat are not tightly sealed, and the ventilation section is prevented from being abraded.

When the valve head 1 is closed, the valve sealing line is positioned in the middle, the stress area of the convex shoulder of the guide sleeve 2 is larger than the stress of the inner side of the sealing line of the valve head 1, the valve is sealed by steam, when the valve head is opened, the effective stress area of the valve head 1 is the same as the stress area of the convex shoulder of the guide sleeve 2, the lifting steam force is zero, and the lifting force is only the gravity of the valve head 1;

the driving mode of the valve head 1 can adopt manual, motor driving, hydraulic driving and other modes of lifting the valve head 1 to realize manual control or remote control;

the connection with the driving mechanism is realized by changing the connection mode of the flange 3 and the valve head 1.