CN203809727U - Spray regulating valve - Google Patents

Abstract

A spray regulating valve comprises a valve body, a valve stem and a spool. The lower end of the valve stem extends to a middle cavity of the valve body. A valve seat is mounted at the bottom of the middle cavity of the valve body. The spool capable of matching with the valve seat to realize on and off of fluid in the valve body is arranged at the lower end of the valve stem. A flow stabilizing component and a flow equalizing hood are sequentially arranged on the valve seat from top to bottom. On the condition of high lift of the spool, a fluid medium flows from an inlet of a flange short-tube and can be divided by a plurality of distributing tubes arranged in the flange short-tube, outflow speed of the medium is limited, the medium is accelerated and then impacts a porous plate, thus damage to the porous plate due to the high-speed flowing fluid directly impacting the porous plate is avoided. Fluid flowing through the porous plate flows out through equalizing holes of the flow equalizing hood, continuous pressure-reduction of the fluid is achieved through the porous plate and the flow equalizing hood, pressure is kept at a moderate pressure value, thus, damages caused by cavitation can be avoided and running reliability of the valve is improved.

Description

A kind of water jet control valve

Technical field

The utility model relates to water jet control valve technical field, specifically relates to the pressure reduction structure of water jet control valve.

Background technique

Water jet control valve is mainly used in controlling the flow of boiler main steam and the required cooling water of reheat steam temperature, it is one of critical component of controlling for fine adjustment vapor (steam) temperature, regulate good vapor (steam) temperature to control and throttle temperature can be kept to set point, thereby guaranteed the efficient operation of steam turbine.And because the inlet outlet pressure differential of desuperheat water jet control valve in main steam system is large, for the desuperheat water jet control valve of ordinary construction, can produce serious cavitation phenomenon, to spool.The collapsing force of valve shaft is very large, sealing surface of seat is suffered badly damaged, affects the normal use of modulating valve, causes unit normally to move.In conventional art, be to adopt the hollow cylinder being combined into some orifice plates to reduce rate of flow of fluid, fluid is separated into some tributaries by the aperture on orifice plate, with this, reduce rate of flow of fluid and pressure, the deficiency existing is: because swiftly flowing fluid directly impacts on orifice plate, and then shunted by aperture, long-time use easily caused very large damage to orifice plate, then valve body caused to damage.

Summary of the invention

In order to overcome the problems referred to above, the utility model provides a kind of water jet control valve, has overcome in conventional art because of orifice plate short, flimsy technical problem in working life.

For achieving the above object, the technological scheme that the utility model provides is:

A water jet control valve, comprises valve body, valve rod and spool, and the lower end of described valve rod is goed deep in valve body lumen, and valve body lumen bottom is provided with valve seat, and the lower end of valve rod is provided with and can coordinates with valve seat the spool of realizing valve body fluid passage break-make; On described valve seat, be disposed with current stabilization assembly and current-sharing cover from top to bottom; Described current-sharing cover is hollow cylinder, and the lower circumference direction of current-sharing cover is evenly distributed with some square equal discharge orifices; Described current stabilization assembly comprises some ram's hornss and flange short tube; The import of described flange short tube and outlet are communicated with valve body import, outlet respectively, and some ram's hornss are all located in flange short tube, and the outlet of every ram's horns is all communicated with the square equal discharge orifice of current-sharing cover; Position below described flange short tube and ram's horns are positioned at spool is provided with an otch that can hold spool, and spool is fixedly connected with valve rod, makes to control by valve rod the connection that spool gos deep into flange short tube capable of blocking and ram's horns outlet and import in otch.

One end in described flange short tube and ram's horns outlet is also provided with orifice plate, orifice plate is provided with some apertures, some apertures respectively with the outlet of each ram's horns and adjacent ram's horns between space is communicated with, the cross-section area of each aperture is all less than ram's horns and exports the space between cross-section area and adjacent ram's horns.

Described flange short tube and ram's horns are all Z-shaped setting, and flange short tube and ram's horns entrance location, higher than exit position, are provided with the otch that can hold spool in one end of flange short tube and ram's horns exit position.

the usefulness of technique scheme is:

1, this novelly provides a kind of water jet control valve, in the situation that spool lift is high, flowing medium enters from flange short tube import, because being provided with many ram's hornss in flange short tube, so fluid can be shunted by ram's horns, the speed that medium flows out is restricted, and then impacts on orifice plate, avoided swiftly flowing fluid directly to impact on orifice plate, orifice plate has been caused to damage; By the fluid after orifice plate, also need could flow out by the equal discharge orifice of current-sharing cover, through the continuous step-down of orifice plate, current-sharing cover, pressure maintains atmospheric pressure IQ all the time, thereby the destruction that can avoid cavitation phenomenon to cause has been improved the operational reliability of valve.

2, the cross-section area of this novel aperture arranging on orifice plate is less than the space between ram's horns outlet cross-section area and adjacent ram's horns, so the fluid in ram's horns and between ram's horns is when through orifice plate, can be stopped and carry out further speed limit by orifice plate, further guarantee the operational reliability of valve.

3, this is novel capable by flange short tube and ram's horns are arranged to Z, and entrance location will be higher than exit position, and further fluid medium flow velocity limits, to guarantee orifice plate and valve operational reliability; And because otch is located to one end of flange short tube and ram's horns exit position, valve rod is fixedly connected with spool, by valve rod, spool can be fallen and fallen in otch, make flange short tube and one end of ram's horns import and one end of outlet blocking-up, can prevent fluid process.

Below in conjunction with the drawings and specific embodiments to this novel being further described.

Accompanying drawing explanation

Fig. 1 is this new structure schematic diagram;

Fig. 2 is this novel current stabilization assembly generalized section.

Embodiment

embodiment 1

A kind of water jet control valve as shown in Figure 1 and Figure 2, comprises valve body 1, valve seat 2, current stabilization assembly 3, valve rod 4, current-sharing cover 5 and valve gap 6; Described valve gap 6 is located at valve body 1 top, between valve gap 6 and valve body 1, is provided with metallic shim, and valve body 1 lumen bottom is provided with valve seat 2, between valve seat 2 and valve body 1 lumen bottom stage face, is provided with metallic shim; Current stabilization assembly 3 and current-sharing cover 5 are installed successively from bottom to top on described valve seat 2; Described current-sharing cover 5 is hollow cylinder, and the lower circumference direction of current-sharing cover 5 is evenly distributed with some square equal discharge orifices, and the bottom of square equal discharge orifice is communicated with 3 outlets of current stabilization assembly; Described current stabilization assembly 3 is located at valve body 1 inside, and current stabilization assembly 3 comprises some ram's hornss 30 and flange short tube 31; The import of described flange short tube 31 and outlet respectively with valve body on import 100, outlet 101 be tightly connected, flange short tube 31 is Z-shaped setting, flange short tube 31 imports are higher than flange short tube 31 outlets; Described ram's horns 30 is all located in flange short tube 31, and ram's horns 31 profiles are consistent with flange short tube 31 profiles, is to be all Z-shaped; In described flange short tube 31 exit positions, be also provided with orifice plate 32, on orifice plate 32, the position in the gap of corresponding ram's horns 30 outlet and adjacent ram's horns 30 is provided with aperture, this aperture is communicated with current-sharing cover aperture, and the cross-section area of each aperture is all less than the space between ram's horns 30 outlet cross-section areas and adjacent ram's horns 30.

Valve body 1 lumen is goed deep into through valve gap 6 centers in described valve rod 4 lower ends, and the lower end of valve rod 4 is provided with the spool 7 that can coordinate with valve seat, and spool 7 and valve rod 4 global formations can realize by spool 7 break-make of controlling between ram's horns 30 and flange short tube 31 imports and outlet.Concrete, ram's horns 30 in described flange short tube 31 and flange short tube 31 is provided with in the position that is positioned at spool 7 bottoms and can holds the otch 310 that spool 7 inserts, by valve rod 4, control spools 7 and go deep into this otch 310 and one end of flange short tube 31 and ram's horns 30 outlets can be separated with one end of import, prevent that fluid from flowing into and exporting from import.

Claims (3)

1. a water jet control valve, comprises valve body, valve rod and spool, it is characterized in that: the lower end of described valve rod is goed deep in valve body lumen, and valve body lumen bottom is provided with valve seat, and the lower end of valve rod is provided with and can coordinates with valve seat the spool of realizing valve body fluid passage break-make; On described valve seat, be disposed with current stabilization assembly and current-sharing cover from top to bottom; Described current-sharing cover is hollow cylinder, and the lower circumference direction of current-sharing cover is evenly distributed with some square equal discharge orifices; Described current stabilization assembly comprises some ram's hornss and flange short tube; The import of described flange short tube and outlet are communicated with valve body import, outlet respectively, and some ram's hornss are all located in flange short tube, and the outlet of every ram's horns is all communicated with the square equal discharge orifice of current-sharing cover; Position below described flange short tube and ram's horns are positioned at spool is provided with an otch that can hold spool, and spool is fixedly connected with valve rod, makes to control by valve rod the connection that spool gos deep into flange short tube capable of blocking and ram's horns outlet and import in otch.

2. a kind of water jet control valve as claimed in claim 1, it is characterized in that: the one end in described flange short tube and ram's horns outlet is also provided with orifice plate, orifice plate is provided with some apertures, some apertures respectively with the outlet of each ram's horns and adjacent ram's horns between space is communicated with, the cross-section area of each aperture is all less than ram's horns and exports the space between cross-section area and adjacent ram's horns.

3. a kind of water jet control valve as claimed in claim 1, it is characterized in that: described flange short tube and ram's horns are all Z-shaped setting, flange short tube and ram's horns entrance location, higher than exit position, are provided with the otch that can hold spool in one end of flange short tube and ram's horns exit position.