CN2789563Y - Main Steam regulating trap - Google Patents
Main Steam regulating trap Download PDFInfo
- Publication number
- CN2789563Y CN2789563Y CN 200520041707 CN200520041707U CN2789563Y CN 2789563 Y CN2789563 Y CN 2789563Y CN 200520041707 CN200520041707 CN 200520041707 CN 200520041707 U CN200520041707 U CN 200520041707U CN 2789563 Y CN2789563 Y CN 2789563Y
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- valve
- valve body
- main steam
- valve seat
- utility
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Abstract
The utility model relates to a main steam drainage regulating valve which is a regulating valve structure. The utility model is one of the important components in an automation control system of heating power equipment, and is used for the discharge and the regulation of draining water in a steam pipeline in industrial systems, such as power stations, petrochemical industry, metallurgy, etc., under the condition of stopping equipment. The utility model relates to a main steam regulating valve. The main steam drainage regulating valve comprises a valve body provided with a liquid flow inlet and outlet, a valve cap arranged on the valve body and a flow quantity regulating mechanism in the valve body, which is composed of a valve core, a valve rod and a valve seat. The utility model is characterized in that the flow quantity regulating mechanism in the valve body is orderly composed of the valve seat arranged at the lower part of the valve body and the valve core which can move up and down in the valve seat, wherein the valve core is connected with a lower valve rod, a valve seat washer is arranged between the valve seat and the valve body, and a flow equalization cover with a throttle hole is arranged above the valve seat; the upper end of the flow equalization cover is butted with the valve cap, and the upper part of the valve cap is connected with a supporter mechanism which drives the valve rod to move. The utility model has the effects multilevel pressure reduction, cavitation erosion prevention and long service life.
Description
Technical field
The utility model main steam drain regulating valve relates to a kind of modulating valve structure, be to be used in one of vitals in the heat power equipment automation control system, it is widely used in the hydrophobic emissions adjustment of equipment stopping time steam line in the industrial systems such as power station, petrochemical industry, metallurgy.
Technical background
Drain regulating valve is installed on the boiler steam line, and before the heat power equipment starting operation, steam line needs heating coil, the incipient stage valve need be opened foot, and along with temperature rises, hydrophobic amount reduces, will suitably close minor valve, to satisfy the requirement of parameters in service.When steam line is stopped transport, also to open modulating valve in required time.Requirement to drain regulating valve is: the one, and the control pressure decay rate, the 2nd, get rid of hydrophobic that entrained steam condenses in the pipeline when stopping using.Because the characteristics and the hydrophobic discharging of hydrophobic discharging are very big to the erosion of drain valve, Maximum differential pressure will reach 20MPa, and temperature reaches 570 ℃.So the design of main steam system drain regulating valve is with generally different.The present main steam drain regulating valve that uses, because material therefor and structure is different, the performance difference of product is very big, subject matter is effectively step-down under High Temperature High Pressure difference operating mode, causes the steam flash distillation, and cavitation takes place, occur at short notice leaking, waste a large amount of energy, in case and the cavitation appearance just produces very big noise.Reduce the Economy of operation.Propose a kind of new technological scheme for this reason, in the design of drain regulating valve, take into full account above-mentioned requirements.
Summary of the invention
The utility model purpose is to provide a kind of multistage throttle step-down, anti-cavitation, low noise, leak little, energy-conservation, the main steam drain regulating valve of long service life.
For reaching above-mentioned purpose, the technological scheme that is adopted is: a kind of main steam drain regulating valve, comprise the valve body that is provided with the liquid flow inlet and outlet, be installed on the valve gap on valve body top, and by spool, valve rod and valve seat constitute the flow control device in the valve body, it is characterized in that: the flow control device in the described valve body is in regular turn by the valve seat that is located at valve body lower portion, spool moving up and down in the valve seat, spool is connected with lower valve rod, be provided with valve washer between valve seat and the valve body, the valve seat top is provided with the current-sharing cover of band throttle orifice, current-sharing cover upper end is replaced with valve gap, and the valve gap top connects establishes the bracket institution that a drive valve rod moves.The utility model has adopted the current-sharing cover, throttle orifice on the current-sharing cover can play the effect of effective step-down, along with valve rod drives moving up and down of spool, throttle orifice on the current-sharing cover is opened gradually, hydrophobic amount changes with the change of modulating valve passage section, thereby has slowed down High Temperature High Pressure high-velocity fluid washing away spool and valve seat.
Wherein, described bracket institution is: be provided with the contiguous block that links to each other with upper valve rod in the support, lower valve rod is connected with upper valve rod through contiguous block, and support top is provided with bearing, is provided with axle sleeve and bearing in the bearing, and upper valve rod is fixed on the bearing.
The utility model can be designed to fabricated construction, so dismounting is simple, and is easy to maintenance.As wherein, can adopt fastening piece to be connected between bearing and valve rod support, connect as screw.
On the such scheme basis, the current-sharing cover that the utility model main steam drain regulating valve can adopt many sleeves porous bell jar or strip bell-jar type to constitute becomes the one-level step-down and is multistage step-down.
On the such scheme basis, described current-sharing cover is two telescopic, three sleeves or other many tube-in-tube structures, and the current-sharing cover to two sleeves and above many tube-in-tube structures has annular space between sleeve, plays multistage step-down and distributes the effect of step-down.
On the such scheme basis, described valve body is imported and exported to angle square connects, i.e. import with export between be vertical setting up separately.
For improving degree of regulation, described spool lower end is a ramp structure.
The utility model compared with prior art has obvious advantage, has adopted many sleeves current-sharing cover, realizes multistage step-down and distributes step-down, make the cavitation probability drop to minimum, prolonged working life, spool design becomes the inclined-plane contact simultaneously, improved the sealability with valve base chamber, energy saving.Have anti-cavitation, low noise leaks little effect.
Describe concrete structure of the present utility model and characteristics in detail below in conjunction with accompanying drawing.
Description of drawings
Fig. 1 is the cross-sectional view of main steam drain regulating valve.
Fig. 2 is two sleeve current-sharing cover structure sectional drawings
Embodiment
Shown in the cross-sectional view that Fig. 1 is the main steam drain regulating valve, the utility model comprises valve body 1 and is installed in the valve gap 2 on valve body 1 top, valve body 1 is provided with the import and export 3 that angle square connects, 3 ', liquid stream controlling mechanism is installed in the valve body 1, comprise the valve seat 4 that is located at valve body 1 bottom, establish valve washer 5 between valve body 1 and the valve seat 4, valve seat 4 tops are provided with two sleeve current-sharing covers 6, current-sharing cover 6 tops and the valve gap place of replacing are provided with valve gap packing ring 7, spool 8 is set in the current-sharing cover 6, and spool 8 tops are connected with lower valve rod 9, are provided with seal ring 10 between lower valve rod 9 and the valve gap 2, valve gap 2 tops are provided with support 11, be provided with contiguous block 12 in the support 11, lower valve rod 9 is connected with upper valve rod 13 through contiguous block 12, and support 11 tops are provided with a bearing 14, be provided with axle sleeve 15 in the bearing 14, bearing 16.Import and export on the valve body 1 and be the connection of angle square formula.
As Fig. 2 is that two sleeve current-sharing covers 6 bottoms are provided with the throttle orifice 61 of multistage throttle shown in two sleeve current-sharing cover 6 section of structures, makes steam discharge between the annular space that enters between sleeve 62 along these holes, realizes distributing step-down and classification step-down.
The utility model is according to handling characteristics, adopts two sleeve current-sharing covers to increase throttling step-down progression, and the High Pressure Difference energy is progressively consumed in the annular space between throttle orifice, sleeve, prevents liquid stream partial vaporization generation cavitation, can prolong four to five times of working lifes.The utility model can be driven by electric actuator, and electrical header produces end thrust and drives valve event, thereby causes the variation of rate-of flow, comes all kinds of parameters in the regulating system, satisfies service condition.
Claims (6)
1. main steam drain regulating valve, comprise the valve body that is provided with the liquid flow inlet and outlet, the valve gap that is installed on valve body top, and constitute flow control device in the valve body by spool, valve rod and valve seat, it is characterized in that: the flow control device in the described valve body is in regular turn by the valve seat that is located at valve body lower portion, spool moving up and down in the valve seat, spool is connected with lower valve rod, be provided with valve washer between valve seat and the valve body, the valve seat top is provided with the current-sharing cover of band throttle orifice, current-sharing cover upper end is replaced with valve gap, and the valve gap top connects establishes the bracket institution that a drive valve rod moves.
2. main steam drain regulating valve according to claim 1, it is characterized in that: be provided with the contiguous block that links to each other with upper valve rod in the support, lower valve rod is connected with upper valve rod through contiguous block, and support top is provided with bearing, be provided with axle sleeve and bearing in the bearing, upper valve rod is fixed on the bearing.
3. main steam drain regulating valve according to claim 1 and 2 is characterized in that: described current-sharing cover is porous bell jar or strip bell-jar type double-sleeve structure, three sleeves or other many tube-in-tube structures, and annular space is arranged between sleeve.
4. main steam drain regulating valve according to claim 3 is characterized in that: described valve body is imported and exported and is the angle square connection.
5. main steam drain regulating valve according to claim 3 is characterized in that: described spool lower end is a ramp structure.
6. main steam drain regulating valve according to claim 1 is characterized in that: described valve body 1 is established a packing ring with valve cover chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041707 CN2789563Y (en) | 2005-05-20 | 2005-05-20 | Main Steam regulating trap |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520041707 CN2789563Y (en) | 2005-05-20 | 2005-05-20 | Main Steam regulating trap |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2789563Y true CN2789563Y (en) | 2006-06-21 |
Family
ID=36789894
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520041707 Expired - Fee Related CN2789563Y (en) | 2005-05-20 | 2005-05-20 | Main Steam regulating trap |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2789563Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074989A (en) * | 2014-06-06 | 2014-10-01 | 温州市隆潮阀门有限公司 | Manual digital control check valve |
| CN113930737A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Metal vapor flow control device under vacuum and control method thereof |
-
2005
- 2005-05-20 CN CN 200520041707 patent/CN2789563Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104074989A (en) * | 2014-06-06 | 2014-10-01 | 温州市隆潮阀门有限公司 | Manual digital control check valve |
| CN113930737A (en) * | 2020-06-29 | 2022-01-14 | 宝山钢铁股份有限公司 | Metal vapor flow control device under vacuum and control method thereof |
| CN113930737B (en) * | 2020-06-29 | 2023-09-12 | 宝山钢铁股份有限公司 | Metal steam flow control device under vacuum and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060621 |