CN202195155U

CN202195155U - Integrated minimum flow regulating valve

Info

Publication number: CN202195155U
Application number: CN201120277198XU
Authority: CN
Inventors: 陈月标; 王添荣; 张俊中
Original assignee: Individual
Current assignee: Individual
Priority date: 2011-07-28
Filing date: 2011-07-28
Publication date: 2012-04-18
Anticipated expiration: 2021-07-28

Abstract

An integrated minimum flow regulating valve comprises a valve body, a valve rod, an upper valve cover, an energy hedging releasing ring, a pressure reducing valve seat ring, a curve flow channel multistage pressure reduction throttling ring and throttling orifice plates. A front cavity, a middle cavity and a rear cavity which are communicated are positioned in the valve body. The front cavity is formed by connecting a plurality of transverse different-diameter holes at the inlet end, an inclined hole at the middle portion and a vertical hole at the tail end, wherein the energy hedging releasing ring and the pressure reducing valve seat ring are sequentially arranged in the vertical hole from the top to the bottom. The curve flow channel multistage pressure reduction throttling ring is positioned in the middle cavity, the transverse holes are arranged in the rear cavity, and a plurality of throttling orifice plates are arranged in the transverse holes. A valve core is arranged at the lower end of the valve rod, the excircle of the valve core is in clearance fit in the curve flow channel multistage pressure reduction throttling ring, and a frustum sealing face is arranged at the lower portion of the valve core and meshed with a metal hard sealing inclined face and a high strength resin soft sealing face which are positioned on the pressure reducing valve seat ring. The integrated minimum flow regulating valve has the advantages of reducing pressure, preventing steam corrosion, reducing noise and being long in service life.

Description

Integrated form minimum discharge modulating valve

Technical field

To the technical deficiency that present outlet sampling cock exists, the utility model provides a kind of multistage damping sampling cock, and it can realize taking a sample under the High Pressure Difference condition, multistage dropping valve high integrated.

Background technique

The minimum discharge modulating valve is claimed the boiler feed pump recycle valve again, and it is installed in the feed water pump outlet port and is connected to oxygen-eliminating device, and boiler feed pump is sent to boiler to water sucking-off in the oxygen-eliminating device.For preventing that feed water pump is overheated and prevent to produce cavitation, the safe traffic that the flow of feed water pump under any circumstance all must be not less than some regulations is minimum discharge just, and this minimum discharge is controlled by the minimum discharge modulating valve.Because the pressure that feed water pump runs well is by its decision of whether outwards supplying water; Therefore very big its pressure reduction of the pressure surge of feed water pump is up to more than more than 300 kilograms; The ability that this just requires the boiler feed pump minimum flow valve must have the flash distillation avoided and prevent cavitation; And, under more than 300 kilograms pressure difference, require to close and guarantee to reach long term zero and leak the quite difficulty that just seems because the time of valve more than 90% all is in closed condition.Existing its flow control form of boiler minimum discharge modulating valve is varied; The employing multiple step plug throttling that the employing circulation that has liquidates, has, the stacked adjusting in employing labyrinth that has; But which kind of mode all respectively possesses some good points deficiency is arranged respectively also; They all have certain restriction effect; The pressure drop effect that also coexists not thoroughly, serious cavitation erosion, problems such as noise content is big, vibration is fierce, the leakage current amount is big, the life-span is short, therefore to the further further investigation of minimum discharge modulating valve and improve and be still an important topic.

Summary of the invention

Many technical deficiencies to present minimum discharge modulating valve existence; The utility model provides a kind of integrated form minimum discharge modulating valve; It adopts the latus rectum of valve pocket to change and the variation of valve pocket channel direction in valve; Make swiftly flowing fluid molecule produce bump, the friction of several times, consume its energy up hill and dale, thereby solved ubiquity problems such as traditional minimum discharge modulating valve pressure drop effect is not thorough, serious cavitation erosion, noise content is big, vibration is fierce, the leakage current amount is big, the life-span is short.

To achieve these goals; The utility model takes following technological scheme to implement: it comprises that anti-explosion electric device, support, valve body, valve rod, bonnet, energy liquidate and discharges ring, reduction valve seat ring, the multistage step-down restrictor ring of curve runner and restricting orifice; Said support is fixed on the bonnet, and bonnet is fixed on the valve body; The top seal of said valve rod is engaged in the inside of bonnet, and its upper end is connected with the anti-explosion electric device; Said valve inner is provided with ante-chamber, lumen and the back cavity of intercommunication; It is characterized in that said ante-chamber by the oblique hole at a plurality of horizontal different diameter hole of entry end, middle part, the vertical hole of end does not connect and compose, not the vertical Kong Zhongzhi of end down and on be provided with energy successively and liquidate and discharge ring, reduction valve seat ring; Said energy liquidates, and to discharge ring be the ring bodies that is equipped with a plurality of radially two-stage step holes on the wall; Said reduction valve seat ring is that wall deployment has a plurality of radially bottoms to be equipped with the U-shaped concave station of a plurality of axial two joint step holes, and the port inclined-plane of concave station is made as sealing surface, is equipped with metal hard-sealing and high-intensity resin soft seal on the sealing surface; Be provided with the multistage step-down restrictor ring of curve runner in the said lumen; The multistage step-down restrictor ring of curve runner by a plurality of lassos layer by layer Spielpassung be socketed to form; All be shaped on the radial hole that a plurality of diameters from top to bottom successively decrease on the wall of every layer of lasso, and the radial hole in every adjacent lasso staggers and intersect; Be provided with transverse holes in the said back cavity, be provided with the multiple tracks restricting orifice in the transverse holes, be equipped with a plurality of throttling pore on the restricting orifice; The lower end of said valve rod is shaped on spool, and the cylindrical Spielpassung of spool is in the hole of the multistage step-down restrictor ring of curve runner, and the spool underpart is shaped on the frustum sealing surface, and it is meshed with port sealing face on the reduction valve seat ring.The utility model liquidates energy and discharges the double-sealing of ring, reduction valve seat ring, the multistage step-down restrictor ring of curve runner, valve seat, the multiple tracks reducing throttle orifice before the valve, the inside that multiple tracks restricting orifice behind the valve all is arranged on same valve body; Thereby the utility model integrates numerous strong points; Has the pressure drop better effects if; Anti-cavitation, noise reduction audio fruit are better, the advantage of longer service life.

Description of drawings

Fig. 1 is the utility model master sectional structure schematic representation;

Fig. 2 is an A-A cross section sectional structure schematic representation among Fig. 1;

Fig. 3 is an I part enlarged view among Fig. 1;

Fig. 4 is an II part enlarged view among Fig. 1;

Fig. 5 is an III part enlarged view among Fig. 2.

In Fig. 1,2,3,4,5: 1 valve body, 2 ante-chambers, 3 reduction valve seat rings, 4 energy liquidate and discharge ring, 5 metal hard-sealings, 6 high-intensity resin soft seal mouths, 7 restricting orifices, 8 back cavities, 9 spools, 10 anti-explosion electric device glands, 11 supports, 12 bonnets, 13 valve rods, the multistage step-down restrictor ring of 14 curve runners, 15 lumens.

Embodiment

As shown in Figure 1, support 11 is fixed on the bonnet 12, and bonnet 12 is fixed on the valve body 1; The top seal of valve rod 13 is engaged in the inside of bonnet 12, and its upper end is connected with anti-explosion electric device 10; The inside of valve body 1 is provided with ante-chamber 2, lumen 15, the back cavity 8 of intercommunication; Ante-chamber 2 is not by the oblique hole at a plurality of horizontal different diameter hole of entry end, middle part, the vertical hole of end connects and composes, not the vertical Kong Zhongzhi of end down and on be provided with energy successively and liquidate and discharge ring 4, reduction valve seat ring 3; Energy liquidates, and to discharge ring 4 be the ring bodies that is equipped with a plurality of radially two-stage step holes on the wall; Reduction valve seat ring 3 is that wall deployment has a plurality of radially bottoms to be equipped with the U-shaped concave station of a plurality of axial two joint step holes, and the port inclined-plane of concave station is made as sealing surface, and sealing surface is made up of metal hard-sealing 5 and high-intensity resin soft seal 6; Be provided with the multistage step-down restrictor ring 14 of curve runner in the lumen 15; The multistage step-down restrictor ring 14 of curve runner by a plurality of lassos layer by layer Spielpassung be socketed to form; All be shaped on the radial hole that a plurality of diameters from top to bottom successively decrease on the wall of every layer of lasso, and the radial hole in every adjacent lasso staggers and intersect; Be provided with transverse holes in the back cavity 8, be provided with multiple tracks restricting orifice 7 in the transverse holes, be equipped with a plurality of throttling pore on the restricting orifice 7; The lower end of valve rod 13 is shaped on spool 9, and the cylindrical Spielpassung of spool 9 is in the hole of the multistage step-down restrictor ring 14 of curve runner, and spool 9 underparts are shaped on the frustum sealing surface, its with reduction valve seat ring 3 on the port sealing face of concave station be meshed.

With the import of the utility model be installed in the feed water pump outlet port, outlet is installed on the deaerator storage tank, anti-explosion electric device 10 is according to the open and close of the commander of the liquid capacity in water tank the utility model.When carry on the valve rod in the utility model 13, when sealing surface on the spool 9 and the sealing surface on the reduction valve seat ring 3 are in open mode; High-pressure liquid in the feed water pump through a plurality of horizontal reducing throttle orifice of valve body ante-chamber 2 ingress at first carry out valve to the valve of high-pressure liquid before throttling; Get into the ring cavity that energy liquidates and surrounds between the outer side wall that discharges ring 4 and the vertical hole of ante-chamber through an inclined hole again; Liquidate through energy then and discharge a plurality of radially two-stage step holes on ring 4 sidewalls and carry out the release that entad liquidates of 360 ° of energy on the direction; To obtain step-down significantly; The fluid that still has later certain pressure through step-down; A part is carried out the pressure that 360 ° of energy on the direction entad liquidate, the liquidate fluid of a part on a plurality of axial two-stage step holes in reduction valve seat ring 3 bottoms and sidewall gone up in vertical direction once more through a plurality of radially two-stage of reduction valve seat ring 3 sidewalls step hole and is liquidated; Make liquidate later etc. the hydraulic fluid stepless action on the frustum sealing surface of spool 9, thereby can avoid erosion, protection spool 9.Curve runner through the fluid of seal clearance is made up of a plurality of apertures that radially stagger through the multistage step-down restrictor ring 15 of valve rod 13 opening curves runners is realized step-down throttling step by step.Owing on the multistage step-down restrictor ring 14 of curve runner, be provided with the radial hole that a plurality of diameters from top to bottom successively decrease, so valve rod 13 lifting amplitudes are big more, the curve runner of opening is just many more, and its flow that passes through is also just big more, otherwise just more little.Through the multistage step-down restrictor ring 14 of curve runner low-pressure fluid later, pass through a plurality of damping hole throttling step-downs in a plurality of reducing throttle orifices and multiple tracks restricting orifice 7 in the back cavity 8 at last again, finally with lower hydrodynamic pressure inflow deaerator storage tank.The utility model will have in the minimum flow valve various multistage throttle buck configuration now and concentrate and be set in the same valve body; Make high-pressure liquid all more than any minimum flow valve through the number of times of latus rectum variation and change flow direction; The probability that swiftly flowing molecule produces bump, friction is bigger, and the energy that has consumed is more thorough.Metal hard-sealing 5 and high-intensity resin soft seal 6 are set on the sealing surface of the utility model in reduction valve seat ring 3, make its sealing surface not only have rigid anti-rapid wear function but also have flexible soft seal function.Thereby bigger, the anti-cavitation of its pressure drop, noise reduction audio fruit are good to make the utility model, the remarkable advantage of longer service life.

Claims

1. integrated form minimum discharge modulating valve; It comprises that anti-explosion electric device, support, valve body, valve rod, bonnet, energy liquidate and discharges ring, reduction valve seat ring, the multistage step-down restrictor ring of curve runner and restricting orifice; Said support is fixed on the bonnet; Bonnet is fixed on the valve body, and the top seal of valve rod is engaged in the inside of bonnet, and its upper end is connected with the anti-explosion electric device; Said valve inner is provided with ante-chamber, lumen and the back cavity of intercommunication, it is characterized in that

Said ante-chamber is not by the oblique hole at a plurality of horizontal different diameter hole of entry end, middle part, the vertical hole of end connects and composes, not the vertical Kong Zhongzhi of end down and on be provided with energy successively and liquidate and discharge ring, reduction valve seat ring;

Be provided with the multistage step-down restrictor ring of curve runner in the said lumen;

Be provided with transverse holes in the said back cavity, be provided with the multiple tracks restricting orifice in the transverse holes;

The lower end of said valve rod is shaped on spool, and the cylindrical Spielpassung of spool is in the hole of the multistage step-down restrictor ring of curve runner, and the spool underpart is shaped on the frustum sealing surface.

2. a kind of integrated form minimum discharge modulating valve according to claim 1, it is characterized in that liquidating said energy, to discharge ring be the ring bodies that is equipped with a plurality of radially two-stage step holes on the wall.

3. a kind of integrated form minimum discharge modulating valve according to claim 1 is characterized in that said reduction valve seat ring is that wall deployment has a plurality of radially bottoms to be equipped with the U-shaped concave station of a plurality of axial two joint step holes, and the port inclined-plane of concave station is made as sealing surface.

4. a kind of integrated form minimum discharge modulating valve according to claim 1; It is characterized in that the multistage step-down restrictor ring of curve runner by a plurality of lassos layer by layer Spielpassung be socketed to form; All be shaped on the radial hole that a plurality of diameters from top to bottom successively decrease on the wall of every layer of lasso, and the radial hole in every adjacent lasso staggers and intersect.

5. according to claim 1 or 3 described a kind of integrated form minimum discharge modulating valve, it is characterized in that the frustum sealing surface of said spool underpart is meshed with port sealing face on the reduction valve seat ring.

6. according to claim 1 or 3 described a kind of integrated form minimum discharge modulating valve, it is characterized in that the sealing surface on the reduction valve seat ring is combined by metal hard-sealing and high-intensity resin soft seal.

7. a kind of integrated form minimum discharge modulating valve according to claim 1 is characterized in that all being equipped with a plurality of damping holes on the multiple tracks restricting orifice at said valve body rear portion.