A kind of HTHP difference tandem balanced type regulating valve
Technical field
It the utility model is related to a kind of balanced type regulating valve, more particularly to a kind of regulation of HTHP difference tandem balanced type
Valve.
Background technology
The high-differential-pressure regulating valve used at present is typically by valve body, valve element, valve core housing, guide pin bushing, valve rod, bonnet, support, execution
Mechanism, seal and installed part composition;Valve rod lower end is connected with valve element, and valve element, valve core housing integrally pass through surface carburization, valve core housing
It is pressed on by guide pin bushing and bonnet in valve body middle chamber, valve body is connected by screw bolts with bonnet;Valve rod lower end uses screw thread with valve element
Add cylinder pin connection, valve element, valve core housing use linear sealing structure, using high pressure gold between valve core housing and valve body, guide pin bushing and bonnet
Belong to spirotallic gasket sealing;The perforate on valve core housing, ensure that valve body middle chamber connects with runner hole, valve element uses Cascade structure, leads to
The fluid crossed in valve is constantly changed by step pressure reducing, flow direction, and flow velocity is controlled, and prevents cavitation from destroying, so as to realize regulation pressure
Power and flow.Its shortcoming is:Valve is high in and low out, and heavy caliber opening force is big;Valve element, valve core housing sealing surface nitriding, sealing surface
Easily abrasion is washed away, and valve service life is short.
Utility model content
The utility model is in order to solve the above-mentioned technical problem, there is provided a kind of HTHP difference tandem balanced type regulating valve,
Solve the problems, such as that high-temp. high-pressure differential opening force is big in the prior art, the easy erosion of sealing surface.
The utility model is to be achieved through the following technical solutions:
A kind of HTHP difference tandem balanced type regulating valve, including valve body, valve core housing, valve element, guide pin bushing, bonnet and valve rod;
The runner hole that lumen is offered on described valve body and is connected with lumen, valve element is installed in the lumen of valve body, opened among valve element
Valve core housing is installed provided with through hole, on the outside of valve element, formed with circulation passage between valve core housing and valve body middle chamber, installed on valve core housing
There is guide pin bushing, the lumen of guaranteed valve body and the dowel hole of runner hole connection are opened up on guide pin bushing, valve element upper end is connected with valve rod, valve rod
Outside is provided with bonnet, and bonnet is arranged on valve body, and valve core housing is pressed in valve body middle chamber by guide pin bushing and bonnet.
Sealed between described valve body, guide pin bushing and bonnet using high-pressure metal spirotallic gasket.
Sealed between described valve body and valve core housing using high-pressure metal spirotallic gasket.
Described valve element and valve core housing use linear sealing sealing structure.
Described valve rod is arranged on bonnet by Packing seat, filler, filler pressing sleeve and hold-down grid.
There are two sealing surfaces on described valve element, the sealing surface of two sealing surfaces of valve element respectively with valve core housing and guide pin bushing connects
Touch.
Described valve element and the sealing surface weld deposit hard alloy of valve core housing.
Described valve element uses Cascade structure.
Compared with prior art, the utility model has technique effect beneficial below:
HTHP difference tandem balanced type regulating valve provided by the utility model, valve element centre holes drilled through, low in and high out, valve
Door be balanced structure, and during closing, two sealing surfaces of valve element contact with the sealing surface of valve core housing and guide pin bushing respectively, close tightly,
No leakage;During unlatching, due to valve element upstream and downstream pressure balance, reduce opening force.Valve element, valve core housing sealing surface weld deposit hard close
Gold, the wear-resisting antiscour of sealing surface, service life length.The perforate on guide pin bushing, ensure that valve body middle chamber connects with runner hole, valve element uses
Cascade structure, constantly being changed by step pressure reducing, flow direction by the fluid in valve, flow velocity is controlled, and prevents cavitation from destroying, from
And realize regulation pressure and flow.
The HTHP difference tandem balanced type regulating valve, efficiently solves that high-temp. high-pressure differential opening force is big, sealing
The problem of face easy erosion.
Brief description of the drawings
Fig. 1 is the High Pressure Difference Desuperheating water regulating valve structural representation provided in the prior art;
Fig. 2 is the structural representation of HTHP difference tandem balanced type regulating valve provided by the utility model.
Wherein, 1, valve body;2nd, high-pressure metal spirotallic gasket;3rd, valve core housing;4th, valve element;5th, guide pin bushing;6th, straight pin;7th, high pressure
SW with outside ring;8th, bonnet;9th, valve rod;10th, Packing seat;11st, filler;12nd, filler pressing sleeve;13rd, hold-down grid.
Embodiment
The utility model is described in further detail with reference to specific embodiment, described is to the utility model
Explanation rather than restriction.
Referring to Fig. 2, a kind of HTHP difference tandem balanced type regulating valve, including valve body 1, valve core housing 3, valve element 4, guide pin bushing 5,
Bonnet 8 and valve rod 9;Lumen and the runner hole connected with lumen are offered on described valve body 1, is provided with the lumen of valve body 1
Valve element 4, through hole is offered among valve element 4, the outside of valve element 4 is provided with valve core housing 3, between valve core housing 3 and the lumen of valve body 1 formed with
Circulation passage, guide pin bushing 5 is installed on valve core housing 3, the lumen of guaranteed valve body and the guide pin bushing of runner hole connection are opened up on guide pin bushing 5
Hole, the upper end of valve element 4 are connected with valve rod 9, and the outside of valve rod 9 is provided with bonnet 8, and bonnet 8 is arranged on valve body 1, and valve core housing 3 is by leading
Set 5 and bonnet 8 are pressed in the lumen of valve body 1, and high-pressure metal spirotallic gasket 7 is used between described valve body 1, guide pin bushing 5 and bonnet 8
Sealing, is sealed between described valve body 1 and valve core housing 3 using high-pressure metal spirotallic gasket 2.Wherein, described valve rod 9 is by filling out
Backing strap 10, filler 11, filler pressing sleeve 12 and hold-down grid 13 are arranged on bonnet 8.
It should be noted that described valve element 4 and valve core housing 3 use linear sealing sealing structure.
Specifically, there is two sealing surfaces on described valve element 4, two sealing surfaces of valve element 4 respectively with valve core housing 3 and guide pin bushing
5 sealing surface contact.Described valve element 4 and the sealing surface weld deposit hard alloy of valve core housing 3.
Further, described valve element 4 uses Cascade structure, and the surface of valve element 4 is provided with some breach.
The specific implementation steps of the utility model are:HTHP difference tandem balanced type regulating valve be by by valve body, valve element,
Valve core housing, guide pin bushing, valve rod, bonnet, support, executing agency, seal and installed part etc. form.Valve rod lower end is connected with valve element,
Valve core housing is pressed in valve body middle chamber by guide pin bushing and bonnet, and valve body is connected by screw bolts with bonnet;Valve element, valve core housing use line
Sealing structure, dowel hole is offered on guide pin bushing, ensure that the lumen of valve body connects with runner hole.Holes drilled through among valve element, and valve
There are two sealing surfaces, low in and high out on core, valve is balanced structure, and during closing, two sealing surfaces of valve element are respectively and valve core housing
And the sealing surface contact of guide pin bushing, close tight, No leakage;During unlatching, due to valve element upstream and downstream pressure balance, reduce high temperature height
Pressure-difference valve opening force.Valve element, valve core housing sealing surface weld deposit hard alloy, the wear-resisting antiscour of sealing surface, service life length.Valve
Core uses Cascade structure, is constantly changed by step pressure reducing, flow direction by the fluid in valve, flow velocity is controlled, and prevents cavitation
Destroy, so as to realize regulation pressure and flow.
, also will not be stuck containing solid particle, valve elements such as welding slags in fluid meanwhile valve element uses Cascade structure, action
Flexibly;Valve element, valve core housing use linear sealing structure, and seal pressure is big, close tight, No leakage;Throttleng surface separates with sealing surface,
Valve fluid leading opposing seal at throttlings at different levels, effectively reduces fluid and sealing surface is washed away in small guide vane, the life-span
It is long;Control characteristic is equal percentage, and flow control is accurate, and adjusting range is big.
HTHP difference tandem balanced type regulating valve provided by the utility model, valve element centre holes drilled through, low in and high out, valve
Door be balanced structure, and during closing, two sealing surfaces of valve element contact with the sealing surface of valve core housing and guide pin bushing respectively, close tightly,
No leakage;During unlatching, due to valve element upstream and downstream pressure balance, reduce opening force.Valve element, valve core housing sealing surface weld deposit hard close
Gold, the wear-resisting antiscour of sealing surface, service life length.The perforate on guide pin bushing, ensure that valve body middle chamber connects with runner hole, valve element uses
Cascade structure, constantly being changed by step pressure reducing, flow direction by the fluid in valve, flow velocity is controlled, and prevents cavitation from destroying, from
And realize regulation pressure and flow.
The HTHP difference tandem balanced type regulating valve, efficiently solves that high-temp. high-pressure differential opening force is big, sealing
The problem of face easy erosion.
The advantages of general principle and principal character of the present utility model and the utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the spirit and scope of the utility model is not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within claimed the scope of the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.