CN202901513U - Control valve special for boiler feed water - Google Patents
Control valve special for boiler feed water Download PDFInfo
- Publication number
- CN202901513U CN202901513U CN 201220534726 CN201220534726U CN202901513U CN 202901513 U CN202901513 U CN 202901513U CN 201220534726 CN201220534726 CN 201220534726 CN 201220534726 U CN201220534726 U CN 201220534726U CN 202901513 U CN202901513 U CN 202901513U
- Authority
- CN
- China
- Prior art keywords
- valve
- sleeve
- fluid
- feed water
- boiler feed
- 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 - Lifetime
Links
Images
Landscapes
- Details Of Valves (AREA)
- Lift Valve (AREA)
Abstract
The utility model relates to a control valve special for boiler feed water. The control valve for the boiler feed water comprises a valve body, wherein a valve cavity is arranged inside the valve body, a first fluid inlet and outlet which is communicated with the valve cavity is arranged on the side portion of the valve body, a second fluid inlet and outlet is arranged at the bottom of the valve body, a valve seat is arranged at the bottom of the valve cavity, a water outlet hole is formed in the middle of the valve seat, and the water outlet hole is communicated with the second fluid inlet and outlet of the valve body. A valve rod is arranged inside the valve cavity, the upper end of the valve rod is connected with an actuator mechanism, the valve core is connected at the lower end of the valve rod, and the valve core is tightly matched with the water outlet hole of the middle of the valve core to form a sealing face. A guide sleeve and a sleeve are arranged on the valve rod of the interior of the valve cavity in a sleeved mode, the valve rod and the valve core are guided by the guide sleeve, a fluid window is arranged on the sleeve, and a maze chip is arranged at the bottom of the sleeve. The control valve for the boiler feed water is characterized in that the upper portion of the fluid window is wide and the lower portion of the fluid window is contracted to form a hopper-shaped fluid window. The control valve for the boiler feed water can stably reduce pressure under large pressure difference, achieves accurate control of flow, and prolongs service life of a valve.
Description
Technical field
The utility model relates to a kind of boiler feed water control valve special, especially a kind of control valve for industries such as oil, chemical industry, metallurgy.
Background technique
Have a plurality of throttling windows on the sleeve of sleeve-type regulating valve, the shape of throttling window has determined the Flow characteristics of modulating valve, and the size of window affects the flow coefficient of modulating valve.Sleeve type modulating valve of the prior art is in the firm small flow stage of opening of spool, operating pressure differential large (high-pressure autoclave surpasses 10MPa) when just feeding water because of boiler, cause spool and valve seat throttleng surface to produce serious cavitation, cause namely in short-term that spool, valve seat surface sealing surface lost efficacy, valve can not be closed tight.Can cause simultaneously the spool vibration, make the valve cisco unity malfunction, also can cause valve stem crack when serious.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of boiler feed water control valve special is provided, and realizes sleeve window small flow, pressure reduction operating mode large, easily cavitation erosion are carried out pressure reduction with classification, prevents cavitation and reduces noise.
According to the technological scheme that the utility model provides, described boiler feed water control valve special comprises valve body, and at the fixing valve gap of valve body, valve gap and actuator are connected to integral body; At described valve inner valve pocket is set, sidepiece at valve body is provided with the first fluid gateway that is communicated with valve pocket, is provided with the second fluid gateway in the bottom of valve body, in the valve pocket bottom valve seat is set, the center of valve seat is provided with osculum, and this osculum is communicated with second fluid gateway on the valve body; In described valve pocket inside valve rod is set, the upper end of valve rod is connected with actuator, and the lower end of valve rod connects spool, the osculum at spool and the valve seat center formation sealing surface that closely cooperates; Sheathed guide sleeve and sleeve on the valve rod in described valve pocket, valve rod and spool are led by guide sleeve, and described sleeve is provided with the fluid window, is provided with the labyrinth chip in the bottom of sleeve; It is characterized in that: shrink upper wider, the bottom of described fluid window, forms funnelform fluid window.
Many the labyrinth grooves that radially distribute are carved with on the surface of described labyrinth chip.
The utility model has been realized the pressure reduction with classification under sleeve window small flow, the pressure reduction operating mode large, easily cavitation erosion, and steadily step-down when large pressure reduction realizes accurately control flow, the working life of improving valve.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation of sleeve described in the utility model.
Fig. 3 is the structural representation of labyrinth described in the utility model chip.
Embodiment
The utility model is described in further detail below in conjunction with concrete accompanying drawing.
Such as Fig. 1 ~ shown in Figure 3: as described in the boiler feed water control valve special comprise valve rod 1, valve gap 2, guide sleeve 3, spool 4, sleeve 5, valve seat 6, valve body 7, actuator 8, bolt 9, first fluid gateway 10, second fluid gateway 11, labyrinth chip 12, fluid window 13 etc.
As shown in Figure 1, the utility model comprises valve body 7, passes through fixedly valve gap 2 of bolt 9 at valve body 7, and valve gap 2 is connected to integral body with actuator 8; In described valve body 7 inside valve pocket is set, sidepiece at valve body 7 is provided with the first fluid gateway 10 that is communicated with valve pocket, be provided with second fluid gateway 11 in the bottom of valve body 7, in the valve pocket bottom valve seat 6 is set, the center of valve seat 6 is provided with osculum, and this osculum is communicated with second fluid gateway 11 on the valve body 7; In described valve pocket inside valve rod 1 is set, the upper end of valve rod 1 is connected with actuator 8, and the lower end of valve rod 1 connects spool 4, the osculum at spool 4 and the valve seat 1 center formation sealing surface that closely cooperates; Sheathed guide sleeve 3 and sleeve 5 on the valve rod 1 in described valve pocket, valve rod 1 and spool 4 are led by guide sleeve 3; As shown in Figure 2, be provided with fluid window 13 at described sleeve 5, shrink upper wider, the bottom of fluid window 13, forms funnelform fluid window 13;
As shown in Figure 2, be provided with labyrinth chip 12 in the bottom of described sleeve 5; As shown in Figure 3, many labyrinth grooves that radially distribute are carved with on the surface of described labyrinth chip 12, and crooked groove has increased the damping of fluid motion, has played the multilevel decompression effect, pressure drop is evenly distributed, thereby reaches the purpose of effective coutroi velocity.
Described actuator 8 can adopt diaphragm actuator, cylinder piston type actuator, electric actuator, hydraulic actuator or pneumatic motor actuator.
Working procedure of the present utility model: when actuator's 1 action, band ovable valve stem 1 moves up and down, and fluid is entered by first fluid gateway 10, and the fluid window 13 on sleeve 5 enters the valve pocket of valve body 7, and fluid is discharged by second fluid gateway 9 again.The utility model unites two into one major and minor feed valve, and namely a valve has the function of secondary feedwater and two valves of main feedwater simultaneously.The utility model arranges labyrinth chip 12 in the bottom of sleeve 5, large pressure reduction, Small Flow Control when just feeding water for boiler; Adopt labyrinth chip 12 be for prevent boiler when just feeding water large pressure reduction operating mode produce cavitation, improve the working life of valve; Large runner window 13 is offered on sleeve 5 tops, the large flow when being used for normal feedwater, small pressure difference control.
Claims (2)
1. a boiler feed water control valve special comprises valve body (7), and at the fixing valve gap (2) of valve body (7), valve gap (2) is connected to integral body with actuator (8); In described valve body (7) inside valve pocket is set, sidepiece at valve body (7) is provided with the first fluid gateway (10) that is communicated with valve pocket, be provided with second fluid gateway (11) in the bottom of valve body (7), in the valve pocket bottom valve seat (6) is set, the center of valve seat (6) is provided with osculum, and this osculum is communicated with second fluid gateway (11) on the valve body (7); In described valve pocket inside valve rod (1) is set, the upper end of valve rod (1) is connected with actuator (8), and the lower end of valve rod (1) connects spool (4), the osculum at spool (4) and valve seat (1) the center formation sealing surface that closely cooperates; The upper sheathed guide sleeve (3) of valve rod in described valve pocket (1) and sleeve (5), valve rod (1) and spool (4) are led by guide sleeve (3), described sleeve (5) is provided with fluid window (13), is provided with labyrinth chip (12) in the bottom of sleeve (5); It is characterized in that: shrink upper wider, the bottom of described fluid window (13), forms funnelform fluid window (13).
2. boiler feed water control valve special as claimed in claim 1 is characterized in that: many labyrinth grooves that radially distribute are carved with on the surface of described labyrinth chip (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220534726 CN202901513U (en) | 2012-10-18 | 2012-10-18 | Control valve special for boiler feed water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220534726 CN202901513U (en) | 2012-10-18 | 2012-10-18 | Control valve special for boiler feed water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202901513U true CN202901513U (en) | 2013-04-24 |
Family
ID=48122184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220534726 Expired - Lifetime CN202901513U (en) | 2012-10-18 | 2012-10-18 | Control valve special for boiler feed water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202901513U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747738A (en) * | 2015-04-01 | 2015-07-01 | 浙江力诺流体控制科技股份有限公司 | Large-aperture high-temperature high-pressure sleeve adjusting valve |
| CN108061171A (en) * | 2017-12-28 | 2018-05-22 | 上海自动化仪表有限公司 | Sleeve adjusting valve |
-
2012
- 2012-10-18 CN CN 201220534726 patent/CN202901513U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104747738A (en) * | 2015-04-01 | 2015-07-01 | 浙江力诺流体控制科技股份有限公司 | Large-aperture high-temperature high-pressure sleeve adjusting valve |
| CN108061171A (en) * | 2017-12-28 | 2018-05-22 | 上海自动化仪表有限公司 | Sleeve adjusting valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201526678U (en) | Multistage decompression high-differential-pressure regulating valve | |
| CN102330834B (en) | Electromagnetic valve | |
| CN103090070B (en) | Piloted reducer | |
| CN203009431U (en) | Cushion valve for excavator motor | |
| CN105090152B (en) | A kind of two grades of dual spring direct-acting overflow valves and its control method | |
| CN104265716B (en) | A kind of super-pressure pilot operated compound relief valve | |
| CN202510790U (en) | Pilot-operated cage type single seat regulating valve | |
| US8973360B2 (en) | Pressure cylinder having a hidden loop design | |
| CN104454736A (en) | Load holding valve and running method thereof | |
| CN202901513U (en) | Control valve special for boiler feed water | |
| CN104315230B (en) | A kind of pressure pressure guiding type water electromagnetic switch valve filtering with guide | |
| CN101737506B (en) | Single-seat adjusting valve | |
| CN201428856Y (en) | High pressure difference particle fluid control valve | |
| RU2012155750A (en) | VALVE ASSEMBLY USED IN PISTON COMPRESSORS, PISTON COMPRESSOR AND COMPRESSOR MODIFICATION METHOD | |
| CN202834094U (en) | High-pressure-difference opposite stack sleeve throttling valve | |
| CN204420230U (en) | A kind of high-pressure solenoid valve of docking with pressure reducing regulator | |
| CN1734142B (en) | Valve installation | |
| CN102434695A (en) | Angle-type and direct-acting pressure reducing valve | |
| CN203082219U (en) | Depressurization regulating valve for liquid oxygen pump backflow | |
| CN201496568U (en) | Single-seat pressure balance adjusting valve | |
| CN204083264U (en) | A kind of piston is as the single-seat adjusting valve of balancing component | |
| CN201078512Y (en) | Baffling and decompression structure for high pressure difference pressure regulator | |
| CN204226808U (en) | The two cylinder reduction regulation segmented septum valve of interior air inlet | |
| CN202182240U (en) | Electromagnetic valve | |
| CN203115111U (en) | Safe stop valve |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |
|
| CX01 | Expiry of patent term |