CN2572151Y - Sewage discharging regulation valve - Google Patents
Sewage discharging regulation valve Download PDFInfo
- Publication number
- CN2572151Y CN2572151Y CN 02267115 CN02267115U CN2572151Y CN 2572151 Y CN2572151 Y CN 2572151Y CN 02267115 CN02267115 CN 02267115 CN 02267115 U CN02267115 U CN 02267115U CN 2572151 Y CN2572151 Y CN 2572151Y
- Authority
- CN
- China
- Prior art keywords
- valve
- spool
- utility
- model
- flow equalizing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a sewage discharging regulation valve, which is characterized in that a valve body 1 with an inlet and an outlet is provided with a cylinder-type valve seat 4; a flow equalizing cover 5 is arranged above the valve seat 4; the lower part of the flow equalizing cover 5 is provided with a flow hole, and the upper part of the flow equalizing cover is provided with a balance hole; the inner side of the flow equalizing cover 5 is provided with a valve core 6 with double cones, and the upper part of the valve core 6 is provided with a valve rod 8. The utility model has the effect of effective, multistage and continuous pollution discharge in a depressurization mode, and has the characteristics of cavitation erosion prevention, long service life and little leakage.
Description
Technical field: the utility model relates to a kind of valve field, a kind of specifically boiler of power plant system continuous blowdown that is applicable to, and it can do to regulate blowdown continuously when boiler-steam dome stove water increases, and makes the effective steam of boiler supply with steam turbine.
Background technique: the present blowdown valve that uses generally all is the aciculiform formula, when highly pressurised liquid is flowed through modulating valve adjusting discharge orifice, under the generation cavitation condition, move, obturator promptly suffers heavy wear, causes valve seat leakage serious, causes modulating valve to completely lose the control function.
Summary of the invention: the purpose of this utility model is to provide a kind of anti-cavitation erosion, long service life, leakage is little and the effectively normal blowdown of regulating and controlling drum boiler water, guarantees the blowdown modulating valve of the normal operation of boiler.
To achieve these goals, the utility model adopts following technological scheme: a kind of blowdown modulating valve, comprise valve body that is provided with the liquid flow inlet and outlet and the valve gap that is installed on top, be provided with discharging of liquid stream and closing mechanism device in the valve body, it is characterized in that, discharging of described liquid stream and closing mechanism device comprise the drum type valve seat that is located in importing and exporting, and are located at the current-sharing cover of valve seat top; Current-sharing cover bottom is provided with metering orifice, and its top is provided with equalizing orifice, is provided with the cone spool in the current-sharing cover, and its underpart is established another cone spool and promptly constituted double cone body spool; Spool top is provided with the valve rod valve rod that spool is moved up and down and passes valve gap.
The utility model has adopted multistage step-down technology, according to the handling characteristics of continuous blowdown valve, carried out design improvement targetedly, promptly reach flow velocity when the highest when valve, and pressure is less, when liquid stream reduced, pressure dual newly recovered, therefore, design is adopted rank streaming layout preferably according to the principle of multistage step-down with the valve inner seal liner, prevent that high pressure liquid stream from cavitating in throttling step-down process, the generation of flash distillation, thereby the life cycle that has prolonged modulating valve.The pressure maximum of valve falls, and the flow velocity highest point is at valve seat and valve core sealed cover water conservancy diversion position, also is the position of the as easy as rolling off a log damage of part therefore.So with valve seat and spool, be designed to the double cone body structure, make valve in opening-closing process, coincide valve core cone separating section fluting by two inside and outside circular cones, make valve reach the purpose of multistage step-down in opening-closing process, flow also increases along with the increase of cone section area simultaneously.Select for use special high strength Precipitation-hardening Stainless Steel to make to the body material of main wearing part, and to valve seat, valve core sealed cover cobalt base alloy built-up welding prevent that effectively sealing surface from washing away damage.
Description of drawings:
Fig. 1 is the utility model structural drawing.
Embodiment:
Below in conjunction with accompanying drawing the utility model is elaborated.
As shown in Figure 1: form valve gap 2, valve body that the utility model comprises valve body 1 and be installed in valve body top and be provided with and import and export 3, be provided with discharging of liquid stream and closing mechanism device in the valve body, this mechanism comprises the drum type valve seat 4 that is located in importing and exporting, be located at the current-sharing cover 5 on the valve seat, current-sharing cover inboard is provided with cone spool 6, the spool bottom is a cone 7, spool top is provided with the valve rod 8 that spool is moved up and down, and valve body is imported and exported and is right-angle type.
The utility model is installed on the pipeline of boiler gas bag outlet, when boiler gas bag stove water increases, sends signal by sensor, and driving mechanism is started working, and with valve opening, liquid flows to into the utility model, regulates step-down by this device, and liquid stream is discharged.After receiving the normal position signal, the driving mechanism counter-rotating makes valve closing.The utility model is in order to adapt to different operational conditions, and blowdown is regulated pattern except can the electronic or pneumatic two kinds of forms of adapted, also has the modulating valve of manual form in addition, bears and presses 450 ℃ of 25～32Mpa bearing temperatures.
Claims (2)
1, a kind of blowdown modulating valve, comprise valve body (1) that is provided with the liquid flow inlet and outlet and the valve gap (2) that is installed on top, it is characterized in that having import and export valve body (1) to be provided with drum type valve seat (4), current-sharing cover (5) is established in valve seat (4) top, described current-sharing cover (5) bottom is provided with metering orifice, its top is provided with equalizing orifice, and double cone body spool (6) is established in current-sharing cover (5) inboard, and spool (6) top is provided with valve rod (8).
2, blowdown modulating valve according to claim 1 is characterized in that double cone body spool is that another circle spool (7) composition is established in cone (6) its underpart.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02267115 CN2572151Y (en) | 2002-09-13 | 2002-09-13 | Sewage discharging regulation valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02267115 CN2572151Y (en) | 2002-09-13 | 2002-09-13 | Sewage discharging regulation valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2572151Y true CN2572151Y (en) | 2003-09-10 |
Family
ID=33732775
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02267115 Expired - Fee Related CN2572151Y (en) | 2002-09-13 | 2002-09-13 | Sewage discharging regulation valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2572151Y (en) |
-
2002
- 2002-09-13 CN CN 02267115 patent/CN2572151Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |