CN203230907U - Cavitation-resistant regulated drain valve - Google Patents
Cavitation-resistant regulated drain valve Download PDFInfo
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- CN203230907U CN203230907U CN 201320246105 CN201320246105U CN203230907U CN 203230907 U CN203230907 U CN 203230907U CN 201320246105 CN201320246105 CN 201320246105 CN 201320246105 U CN201320246105 U CN 201320246105U CN 203230907 U CN203230907 U CN 203230907U
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Abstract
The utility model relates to a cavitation-resistant regulated drain valve, which comprises a valve body, a valve seat, a valve clack, a valve rod and a valve cover, wherein the top end of the valve rod passes through the center of the valve cover; a packing is arranged between the valve rod and the valve cover; the top of the packing is compressed via a packing gland; the upper part of the valve rod is provided with screw threads; a throttling sleeve is fixed in a valve cavity on a medium inlet side; the lower end of the throttling sleeve is propped against a non-sealing surface at the upper end of the valve seat; the throttling sleeve and the valve seat are used for partitioning the valve cavity on the medium inlet side into an inner throttling sleeve part and an outer throttling sleeve part; the throttling sleeve is formed by sleeving multiple layers of sleeves layer after layer; gaps are reserved among the layers on the lower part of the throttling sleeve, and a plurality of throttling holes are formed radially in each layer of sleeve wall; and the outer diameter surface of the valve clack is in sliding fit with the inner diameter surface of the throttling sleeve. The cavitation-resistant regulated drain valve has the characteristics of no production of cavitation, need of small executing force, sealing reliability, wear resistance, erosion resistance, simple structure, convenience in installing, long service life and the like, and cavitation can be avoided under the working condition of large pressure difference; and meanwhile, the cavitation-resistant regulated drain valve can be driven by using a small executer.
Description
Technical field
The utility model relates to a kind of drain regulating valve, relate in particular to a kind of be suitable for using under the high temperature and high pressure condition can anti-cavitation erosion drain regulating valve, mainly be applicable in the draining system of the steam turbine side of large-scale power station supercritical unit, ultra supercritical unit and boiler side.
Background technique
Modulating valve is as the power unit in the automatic control and adjustment system, in modern industry production, be used widely, the transformation of essence has taken place in its control and communication modes along with computer and bus The application of new technique, improved degree of accuracy and the reliability of control greatly.But under high temperature and high pressure condition in the using process, pipeline fluid is often improper etc. former thereby produce cavitation erosion because of device structure design, installation or process parameters design, cause serious damage to regulating trim, cause vibration and the noise of whole system simultaneously, have a strong impact on the working life of modulating valve and the accuracy of control system, bring very big hidden danger to industrial production.
At home in the newly-built unit, the higher position of parameter in steam turbine side and the boiler side of unit, consider Security and the reliability of control, basically all selected the valve manufacturer of import for use, but the type selecting that often exists valve can not satisfy the problem of valve actual conditions needs, and leakage in valve produces, internals frequent breakage, valve cause problems such as vibration and noise because of cavitation erosion.
Be example with the coal-fired unit of state electricity Taizhou 2X1000MW ultra supercritical; vapour side height adds that the design of hydrophobic pitch has six in the draining system; three add normally hydrophobic for height; three add accident hydrophobic (or be called height add crisis hydrophobic) for height; because it is the dewatering capacity-enlarging device that height adds the valve of the hydrophobic pitch of accident latter linked; container inner pressure is for lower, and pressure reduction is bigger, and valve often has interior leakage, internals frequent breakage, valve to cause problems such as vibrations and noise because of cavitation erosion.
By analysis, the main cause of leakage in valve produces, internals frequent breakage has: the front and back pressure reduction of (1) valve is excessive, occurs problems such as cavitation erosion, flash distillation easily.The pressure reduction △ P of valve it is generally acknowledged, if just might produce cavitation erosion greater than 2.5MPa.And under design conditions; the valve pressure reduction that the #1-#3 height adds the crisis drain regulating valve is respectively 8.353MPa, 5.018MPa and 2.289MPa; medium temperature is respectively 298 ℃, 264 ℃ and 183.5 ℃, that is to say that the #1, the #2 height that use under the above-mentioned operating mode add the hydrophobic pitch of crisis and generally cavitation phenomenon can occur.(2) valve has adopted the spool form of balanced type: design has seal ring on the flap, perhaps is called balanced seal, is used for blocking medium, and grade (leakage class) majority of closing of sealing seat is ANSI IV level; Be to reach ANSI V level making spring-loading seal ring, but in long-term use owing to reasons such as wearing and tearing are damaged through the seal ring that regular meeting causes, produce bigger leakage.Although the spool form of balanced type can form less valve drive forces, adopt less final controlling element, often be not suitable for the operating mode of requirement zero leakage.Above-mentioned institute analysis situation all exists in most of thermal power generation units.
The model utility content
For solving the problems referred to above of prior art, the utility model provides a kind of anti-cavitation erosion drain regulating valve, characteristics such as this valve has that the cavitation erosion of not producing, required implementation capacity are little, sealing is reliable, wear-resisting, anti-impact erosion, simple in structure, easy for installation, long service life, under the operating mode of big pressure reduction, can avoid producing cavitation erosion, can be driven by less final controlling element simultaneously.
The main technical schemes that the utility model adopts:
A kind of anti-cavitation erosion drain regulating valve, comprise valve body, be fixed in the valve seat in the valve pocket that described valve body surrounds, the sealing surface of its sealing surface and described valve seat constitutes the flap of primary seal pair, the valve gap that drives the valve rod of described flap straight line lifting and be fixedly mounted on the valve body top, be fixed with orifice sleeve in the valve pocket of medium suction side, the lower end of described orifice sleeve is against on the non-tight face of described valve seat upper end, orifice sleeve and valve seat are divided into medium suction side valve pocket in the orifice sleeve, outer two-part, orifice sleeve is by multilayer sleeve sheathed composition layer by layer, the layer of the bottom of orifice sleeve with layer between leave the gap and every layer of sleeve wall is provided with some throttle orifices, the external diameter surface of flap and the inside diameter surface of orifice sleeve are slidingly matched, valve stem tip is set out from valve gap central authorities, be filled with the filler for sealing between valve rod and the valve gap, the top of filler compresses by Gland, and described valve rod top is provided with one section screw thread.
Preferably be provided with on the described flap not have therein for stem lower portion and break away from the groove structure that is slidingly connected, the bottom of groove structure offers the center through hole of the described flap of up/down perforation, the lower end of described valve rod is provided with the valve stem seal face, and the sealing surface of locating to arrange with the last aperture of described center through hole forms secondary sealing pair.
The sealing surface that the place, last aperture of the sealing surface of described valve seat, center through hole arranges is preferably conical surface, and the sealing surface of described flap, valve stem seal face are preferably sphere, and described primary seal pair and secondary sealing pair belong to linear sealing.
The sealing surface that the sealing surface of described valve seat, flap, valve stem seal face and place, last aperture arrange can form for machining behind the pile-up welding hard alloy material.
Can be provided with the valve seat attachment face on the described valve body, described valve seat axially locating preferably is provided with sealing and uses spirotallic gasket on the valve seat attachment face between valve seat and the valve seat attachment face, and valve seat axially bears against realization by orifice sleeve to valve seat with respect to the axial restraint of valve body.
Can be provided with on the described orifice sleeve perpendicular to the outstanding flange of orifice sleeve axial direction, described flange is clamped between valve gap and the valve body, is provided with the sealing spirotallic gasket between flange and valve body and the valve gap separately.
Described orifice sleeve can be formed by interior cover and overcoat assembly welding, interior cover is the last thick thin structure down of uniform internal diameter, the outside of the thinner wall section of cover in overcoat is set in, the outside, cover top in described flange is arranged on, leave the gap between valve gap and the interior cover end face, in put and be provided with some equalizing orifices, cover end face in an end of equalizing orifice is opened in, the other end is opened in the bottom outside of heavy section.
Cure process and preferably keep certain rigidity poor can be carried out in the flap surface of matching with orifice sleeve, described groove structure comprises the circular section groove that the top that arranges on the flap is uncovered and is screwed in the flap nut on groove top and is used for groove and the Cock screw of flap nut location, the bottom of described valve rod is provided with the valve rod flange, the below of valve rod flange is the lower end of valve rod, the valve rod flange is slidingly connected between the bottom of groove and flap nut, is provided with a plurality of radial through-flows hole near the sidewall of bottom portion of groove.
For aforesaid any one described anti-cavitation erosion drain regulating valve, preferably be fixed with the erosion control sleeve coaxial with valve seat in the valve pocket of media outlet side, the bottom seal of described erosion control sleeve is distributed with a plurality of through holes on the circumferential side wall.
High, the low conical surface on every side of central authorities preferably is arranged on described erosion control sleeve bottom inside surface.
The beneficial effects of the utility model:
By the multi-step pressure reduction design of orifice sleeve, make every grade of throttle orifice front and back pressure drop less than the critical pressure differential that produces cavitation, to reach the purpose of problems such as eliminating cavitation erosion, flash distillation, vibration.
By design erosion control sleeve with and the recoil wimble structure of bottom, utilize the flow direction that increases resistance and change medium to limit the flow velocity of medium, and reduce noise and vibration, prevent that medium is to the direct impact of valve interior wall.
By adopting the design of equalizing valve, avoid medium directly to the washing away of flap, sealing surface of seat, improved the working environment of flap and valve seat, prolonged the working life of valve internals, also reduce the needed implementation capacity of operation greatly, can select less actuator for use.
The design of equalizing valve is combined with the multi-step pressure reduction structure of valve, utilize the control of fluid course to reduce erosion to the flap sealing surface, weakened medium washing away and destroy flap and sealing surface of seat.
The seat design of adopt living has changed in the past that the common valve seat of valve is threaded or welded structure with valve body, avoided because of thread biting locking, welding etc. causes mangetic core assembly can't field-strip and processing grinding, can't change a series of problems such as spare part.
Description of drawings
Fig. 1 is an embodiment's of the present utility model overall structure schematic representation;
Fig. 2 is a kind of embodiment's the structural representation of the orifice sleeve of Fig. 1;
Fig. 3 is a kind of embodiment's the structural representation of the equalizing valve of Fig. 1;
Fig. 4 is in the structural representation of opening and closing position for the utility model.
Embodiment
Referring to Fig. 1-4, the utility model provides a kind of anti-cavitation erosion drain regulating valve, comprise valve body 1, be fixed in the valve seat 2 in the valve pocket that described valve body surrounds, the sealing surface of its sealing surface and described valve seat constitutes the flap 3 of primary seal pair, drive the valve rod 4 of described flap straight line lifting and pass through bolt 11, the valve gap 9 of nut 12 screw threads for fastening above valve body, valve stem tip is set out from valve gap central authorities, be filled with the filler 13 for sealing between valve rod and the valve gap, the top of filler compresses by Gland, Gland is fastening by pressing plate, pressing plate is by bolt, nut is fixed on the valve gap end face, described valve rod top (pass and be positioned at part above the pressing plate) is provided with one section trapezoidal thread, can be used for connecting valve rod driving device.Be fixed with orifice sleeve 5 in the valve pocket of medium suction side, one section external diameter of orifice sleeve cooperates with one section inwall of valve pocket, and the two maintenance is coaxial, and the lower end of described orifice sleeve is against on the non-tight face of described valve seat upper end.Orifice sleeve and valve seat are divided into the inside and outside two-part of orifice sleeve with medium suction side valve pocket.Orifice sleeve is formed by interior cover 5.1 and overcoat 5.2 assembly weldings, and interior cover is last thick thin structure down, and the gap was left in the outside of the thinner wall section of cover in overcoat was set between the inside and outside cover, radially was evenly distributed with some throttle orifices 5.3 on overcoat and the interior cover thinner wall section whole circumference.The external diameter surface of flap and the inside diameter surface of orifice sleeve (internal surface of cover namely) are slidingly matched, and orifice sleeve can be used as the guiding of flap.
Cavitation erosion is a kind of waterpower flow phenomenon, and the immediate cause that produces cavitation erosion is pipeline fluid because the sudden change of resistance has produced flash distillation and cavitation, and the reason that flash distillation and cavitation take place is the sudden change that throttling has caused pressure.If produce the critical pressure differential △ PT of cavitation, if the pressure drop △ P＜△ PT of energy control valve can avoid the generation of cavitating.It is generally acknowledged, if the pressure reduction △ P of valve generally can not produce cavitation erosion less than 2.5MPa, even there is the generation of cavitation erosion also can not cause serious damage to valve.
Based on above theory, because the pressure drop of system requirements can not reduce in the practice, so the utility model adopts the multilevel hierarchy that once big pressure jump is decomposed into several times, valve to this High Pressure Difference in design adopts secondary or the throttling more than the secondary, pressure drop is assigned to each level of orifice sleeve, and step-down step by step makes each level all be no more than critical pressure differential, the pressure of every bit all is higher than the saturated vapor pressure under this temperature, fluid just not cavitation erosion generation in whole step-down process like this.
Present embodiment adopts the two-layer sleeve of inside and outside cover to realize two-stage decompression, the decompression principle is: after flap is opened, medium at first carries out throttling by the aperture that puts outward, behind the first layer throttle orifice, along with the increase of cross section of fluid channel, flow velocity descends, reached the purpose of volume-expanding pressure-reducing, medium continues to flow under the effect of pressure reduction, when overlapping throttle orifice in running into, begin to repeat above-mentioned decompression process, and finally reach the effect of easing stress that needs.By binding medium parameters such as throttle orifice aperture, concrete arrangement, the orifice sleeve sleeve number of plies are calculated accurately, pressure drop is namely blocked the pressure reduction that stream forms less than the critical pressure differential that produces cavitation before and after guaranteeing every grade of throttle orifice, to reach the purpose of problems such as eliminating cavitation erosion, flash distillation, vibration.
Cure process and preferably keep certain rigidity poor can be carried out in the flap surface of matching with orifice sleeve, so that the bite phenomenon can not take place during valve opening and closing.The matching surface of flap and orifice sleeve, flap and valve rod all carries out cure process, can increase the ability of anticorrosion, anti-erosion.In the present embodiment, orifice sleeve is selected Martensitic Stain Less Steel or Precipitation-hardening Stainless Steel for use, flap and valve rod adopt Austenitic Stainless Steel to carry out pile-up welding hard alloy, the inner and outer surface of valve internals all carries out cure process, strengthen corrosion-resistant, the ability that cavitates and wash away of internals greatly, increase the working life of internals.
Flap is provided with the uncovered cross section in top and is connected with flap nut 6 for circular groove, groove top, the two threaded connection place is provided with the Cock screw 7 of locating for circumferentially, the bottom of described valve rod is provided with valve rod flange 4.1, the below of valve rod flange is the lower end 4.2 of valve rod, the valve rod flange is slidingly connected between the bottom of groove and flap nut, the flap nut is as the spacing part in upper end of valve rod flange motion, the endoporus of valve rod flange and flap is slidingly matched, and can guarantee valve rod, flap when valve opening and closing and the concentricity of valve body.Bottom portion of groove offers the center through hole 3.1 of the described flap of up/down perforation, and the lower end of described valve rod is provided with the valve stem seal face, and the sealing surface of locating to arrange with the last aperture of described center through hole forms secondary sealing pair.Stem lower portion and flap groove and center through hole have constituted the equalizing valve structure, and valve rod is equivalent to the flap of equalizing valve, and flap and center through hole are equivalent to valve seat and the valve seat orifice of equalizing valve.For the ease of distinguishing, the valve arrangement of flap and valve seat formation is called main valve.Flap, valve rod connect with the flap locknut, the stroke of the last plane control equalizing valve of the end face of flap locknut and valve rod flange.Adopt the design of equalizing valve can avoid directly washing away flap, sealing surface of seat of medium, improved the working environment of flap and valve seat, prolong the working life of valve internals, can also reduce to operate needed implementation capacity greatly, can select less actuator for use.
There is pressure reduction in flap at the medium action direction, is the valve core structure of unbalanced, does not have up and down the directly through hole of UNICOM on the flap.The valve core structure of unbalanced can be avoided the inefficacy of balanced seal and cause the interior leakage of valve; The valve of general this kind structure owing to the additional equalizing valve structure that adopts, can be realized being driven by less implementation capacity in the utility model because the effect of medium needs bigger final controlling element to realize opening and closing, the sealing surface of protection main valve flap.The valve core structure of unbalanced does not have nonmetallic sealing material, not limited by the temperature of nonmetallic material, and sealingly secure is reliable.
The sealing surface that the place, last aperture of the sealing surface of described valve seat, center through hole arranges is preferably conical surface, and the sealing surface of described flap, valve stem seal face are preferably sphere, and described primary seal pair and secondary sealing pair belong to linear sealing.Potted line is positioned at the neutral position of sealing surface of seat.
Different with traditional modulating valve, the utility model adopts the sealing pair form of cambered surface and the conical surface.The sealing surface of flap is designed to sphere, it is a part that intercepts at sphere, the center of circle of this sphere is designed on valve (valve rod) axis, even being the position of flap in use, the characteristics of sphere with respect to axis certain displacement has taken place, perhaps produced certain rotation, as long as the centre of sphere of sealing sphere keeps in allowed limits, when flap with after valve seat contacts, still can form complete a, potted line clearly, to guarantee tight valve seal effect, the leakage class of valve can be reached more than the ANSI V level for a long time.
The sealing surface that the sealing surface of described valve seat, flap, valve stem seal face and place, last aperture arrange is that machining forms behind the pile-up welding hard alloy material, and the ability of antiscour, anti-cavitation erosion is strong, and can repair repeatedly.
Can be provided with the valve seat attachment face on the described valve body, be planar annular, the valve seat axially locating is provided with sealing with spirotallic gasket 8 between described valve seat and the valve seat attachment face on the valve seat attachment face, and valve seat axially bears against realization by orifice sleeve to it with respect to the fixing of valve body.This seat design alive has changed in the past that the common valve seat of valve is threaded or welded structure with valve body, avoided because of thread biting locking, welding etc. causes mangetic core assembly can't field-strip and processing grinding, can't change a series of problems such as spare part.Work in-process if the height of control valve seat and orifice sleeve and with the degree of depth of valve body in a less dimensional tolerance range, spiral wound gasket can produce almost equal decrement, can guarantee the sealing of valve, realization easily in the processing.
Can be provided with on the described orifice sleeve perpendicular to the outstanding flange of orifice sleeve axial direction, described flange is clamped between valve gap and the valve body, be provided with sealing spirotallic gasket 10 between flange and valve body and the valve gap separately, but the relative set spirotallic gasket is installed annular groove on valve body, flange or the valve gap, the feasible paired surface that fits: a side is for having the surface that annular groove is installed in valve body upper surface and flange lower surface, lug upper surface and the valve gap lower surface, the opposing party is the plane, both can realize the circumferentially spacing of spirotallic gasket, improve sealing effect again.Axially the having three places and used spiral wound gasket of valve, make the dismounting of valve very convenient.Because these pads are realized sealability by extruding, so pad can not be reused.
The outside, cover top in described flange is arranged on, leave the gap between valve gap and the interior cover end face, in put and be provided with some equalizing orifices 5.4, cover end face in one end of equalizing orifice is opened in, the other end is opened in the bottom outside of heavy section, is used for being communicated with the inside and outside valve pocket of orifice sleeve, under the main valve closed condition, the top that is communicated with high pressure side and flap can reduce flap pressure reduction up and down, in order to reduce to be applied to the lifting force on the equalizing valve.In put and be provided with some tapped holes 5.5, lifting orifice sleeve when can be used for installing and removing internals.Under the assembling condition, equalizing orifice is communicated with the upper cavity of flap with the gap of valve cover chamber by its top, can guarantee that valve can be opened fast in hydrophobic process.
Leave the gap between corresponding with described groove one section outer wall and orifice sleeve inwall on the flap, be provided with a plurality of radial through-flows hole 3.2 near the sidewall of bottom portion of groove, as 6-8, be used for equalizing valve and open the back medium through the circulation of center through hole.
Be fixed with the erosion control sleeve coaxial with valve seat in the valve pocket of media outlet side, described erosion control sleeve can be an independently part, in the present embodiment, the part that erosion control sleeve and valve seat are structure as a whole, its bottom seal, be distributed with a plurality of throttle orifices on the peripheral wall, high, the low conical surface on every side of central authorities is arranged on the inside bottom surface, claims this conical surface to be the recoil awl.Arranging of erosion control sleeve can prevent effectively that medium from directly impacting valve interior wall.Design angle and the size of suitable recoil awl, can make high-velocity fluid after passing through valve seat, the active force of boring the conical surface collides mutually owing to be subjected to recoiling, in the erosion control sleeve, cause highly turbulent flow, make the kinetic energy of fluid owing to the phase mutual friction becomes heat energy, reduce the formation of bubble, further reduce the generation of gasification, cavitation erosion, can play the effect that reduces vibration, reduces noise equally.
The working procedure of valve of the present utility model is: when closing valve, move down under the effect of implementation capacity, valve rod equalizing valve after contacting with main valve clack cuts out, and the circulation of medium above flap is cut off; Enter the medium through hole flap of valve and the gap of orifice sleeve and enter the flap top, because non-equilibrium valve core structure, above flap, produce a downward strength, the thrust acting in conjunction of this strength and final controlling element, driving main valve clack continues to move down, contact valve closing up to valve seat position flap with the sealing surface of valve seat.Closing of valve is to rely on the acting in conjunction of final controlling element and medium power to realize.
During valve opening, final controlling element drives valve rod and moves up, and equalizing valve is opened, and medium enters the flap top along the equalizing orifice of flap, and downforce begins balance on the flap, only needs the less lifting force can be with valve wide open.
For the structure of other positions of this valve, the utility model also has following characteristics: valve rod drives the interface shape of employing standard, can select the final controlling element of multiple mode such as electronic and pneumatic according to user's requirement for use; The filler place has selected standard size for use, and can carry out pro forma adjustment according to concrete operation parameter.
The utility model can be applicable to the electric power enterprise height and adds accident drain regulating valve, height and add two media of carbonated drink, big pressure reduction such as normal drain regulating valve, be prone to occasion such as cavitation erosion.
Alleged in this specification " on ", D score, " top ", " end " be relative accompanying drawing 1, is for the ease of expressing the relative position relation of each part, as the restriction to concrete structure of the present utility model.In this specification axially, radially, circumferentially refer to corresponding part or structure axially, radially, circumferentially because part such as valve seat, flap, valve rod or structure are the coaxial position relation, therefore above-mentioned axially, radially, circumferential represented direction essence is identical.
Claims (10)
1. anti-cavitation erosion drain regulating valve, comprise valve body, be fixed in the valve seat in the valve pocket that described valve body surrounds, the sealing surface of its sealing surface and described valve seat constitutes the flap of primary seal pair, the valve gap that drives the valve rod of described flap straight line lifting and be fixedly mounted on the valve body top, it is characterized in that being fixed with orifice sleeve in the valve pocket of medium suction side, the lower end of described orifice sleeve is against on the non-tight face of described valve seat upper end, orifice sleeve and valve seat are divided into medium suction side valve pocket in the orifice sleeve, outer two-part, orifice sleeve is by multilayer sleeve sheathed composition layer by layer, the layer of the bottom of orifice sleeve with layer between leave the gap and every layer of sleeve wall is provided with some throttle orifices, the external diameter surface of flap and the inside diameter surface of orifice sleeve are slidingly matched, valve stem tip is set out from valve gap central authorities, be filled with the filler for sealing between valve rod and the valve gap, the top of filler compresses by Gland, and described valve rod top is provided with one section screw thread.
2. anti-cavitation erosion drain regulating valve as claimed in claim 1, it is characterized in that described flap is provided with and can have the groove structure that disengaging is slidingly connected therein for stem lower portion, the bottom of groove structure offers the center through hole of the described flap of up/down perforation, the lower end of described valve rod is provided with the valve stem seal face, and the sealing surface of locating to arrange with the last aperture of described center through hole forms secondary sealing pair.
3. anti-cavitation erosion drain regulating valve as claimed in claim 2, it is characterized in that the sealing surface of described valve seat, the sealing surface that the place, last aperture of center through hole arranges are conical surface, the sealing surface of described flap, valve stem seal face are sphere, and described primary seal pair and secondary sealing pair belong to linear sealing.
4. anti-cavitation erosion drain regulating valve as claimed in claim 3 is characterized in that the sealing surface of sealing surface, valve stem seal face and the setting of place, last aperture of described valve seat, flap is that machining forms behind the pile-up welding hard alloy material.
5. anti-cavitation erosion drain regulating valve as claimed in claim 4, it is characterized in that described valve body is provided with the valve seat attachment face, described valve seat axially locating is on the valve seat attachment face, be provided with sealing between valve seat and the valve seat attachment face and use spirotallic gasket, valve seat axially bears against realization by orifice sleeve to valve seat with respect to the axial restraint of valve body.
6. anti-cavitation erosion drain regulating valve as claimed in claim 5, it is characterized in that described orifice sleeve is provided with perpendicular to the outstanding flange of orifice sleeve axial direction, described flange is clamped between valve gap and the valve body, is provided with the sealing spirotallic gasket between flange and valve body and the valve gap separately.
7. anti-cavitation erosion drain regulating valve as claimed in claim 6, it is characterized in that described orifice sleeve is formed by interior cover and overcoat assembly welding, interior cover is the last thick thin structure down of uniform internal diameter, the outside of the thinner wall section of cover in overcoat is set in, the gap was left between valve gap and the interior cover end face in the cover top outside in described flange was arranged on, in put and be provided with some equalizing orifices, cover end face in one end of equalizing orifice is opened in, the other end is opened in the bottom outside of heavy section.
8. anti-cavitation erosion drain regulating valve as claimed in claim 7, it is characterized in that the flap surface of matching with orifice sleeve carries out cure process and keep certain rigidity poor, described groove structure comprises the circular section groove that the top that arranges on the flap is uncovered and is screwed in the flap nut on groove top and is used for groove and the Cock screw of flap nut location, the bottom of described valve rod is provided with the valve rod flange, the below of valve rod flange is the lower end of valve rod, the valve rod flange is slidingly connected between the bottom of groove and flap nut, is provided with a plurality of radial through-flows hole near the sidewall of bottom portion of groove.
9. as claim 1,2,3,4,5,6,7 or 8 described anti-cavitation erosion drain regulating valves, it is characterized in that in the valve pocket of media outlet side and the coaxial erosion control sleeve that is fixed with of valve seat, the bottom seal of described erosion control sleeve is distributed with a plurality of through holes on the circumferential side wall.
10. anti-cavitation erosion drain regulating valve as claimed in claim 9 is characterized in that described erosion control sleeve bottom inside surface is arranged to high, the low conical surface on every side of central authorities.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246105 CN203230907U (en) | 2013-05-09 | 2013-05-09 | Cavitation-resistant regulated drain valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320246105 CN203230907U (en) | 2013-05-09 | 2013-05-09 | Cavitation-resistant regulated drain valve |
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| CN203230907U true CN203230907U (en) | 2013-10-09 |
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| CN 201320246105 Expired - Fee Related CN203230907U (en) | 2013-05-09 | 2013-05-09 | Cavitation-resistant regulated drain valve |
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| CN103867735A (en) * | 2014-03-28 | 2014-06-18 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
| CN108223820A (en) * | 2017-06-12 | 2018-06-29 | 襄阳航力机电技术发展有限公司 | A kind of operating valve valve rod |
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| CN109681650A (en) * | 2019-01-17 | 2019-04-26 | 宣达实业集团有限公司 | High oil field water injection steam injection manual shutoff regulating valve |
| CN110375100A (en) * | 2019-08-23 | 2019-10-25 | 开立基业（北京）阀门制造有限公司 | Flow control valve and electric flow control valve |
| CN113294588A (en) * | 2021-06-18 | 2021-08-24 | 威海博通阀门有限公司 | Anti-cavitation high-pressure drain valve |
| CN115614480A (en) * | 2022-09-22 | 2023-01-17 | 浙江中控流体技术有限公司 | Plunger type multistage pressure-reducing noise-reducing valve core and single-seat control valve |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103867735A (en) * | 2014-03-28 | 2014-06-18 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN103867735B (en) * | 2014-03-28 | 2017-02-15 | 株洲南方阀门股份有限公司 | Main water supply bypass regulating valve |
| CN103939624A (en) * | 2014-05-09 | 2014-07-23 | 杭州华惠阀门有限公司 | Reducing valve |
| CN104896109A (en) * | 2015-05-29 | 2015-09-09 | 杭州华惠阀门有限公司 | Pressure reducing valve |
| CN108223820A (en) * | 2017-06-12 | 2018-06-29 | 襄阳航力机电技术发展有限公司 | A kind of operating valve valve rod |
| CN108223820B (en) * | 2017-06-12 | 2024-03-15 | 襄阳航力机电技术发展有限公司 | Action valve rod |
| CN109163135A (en) * | 2018-11-07 | 2019-01-08 | 吴忠中创自控阀有限公司 | A kind of pair of idle discharge steam control valve |
| CN109681650A (en) * | 2019-01-17 | 2019-04-26 | 宣达实业集团有限公司 | High oil field water injection steam injection manual shutoff regulating valve |
| CN110375100A (en) * | 2019-08-23 | 2019-10-25 | 开立基业（北京）阀门制造有限公司 | Flow control valve and electric flow control valve |
| CN113294588A (en) * | 2021-06-18 | 2021-08-24 | 威海博通阀门有限公司 | Anti-cavitation high-pressure drain valve |
| CN115614480A (en) * | 2022-09-22 | 2023-01-17 | 浙江中控流体技术有限公司 | Plunger type multistage pressure-reducing noise-reducing valve core and single-seat control valve |
| CN115614480B (en) * | 2022-09-22 | 2023-09-19 | 浙江中控流体技术有限公司 | Plunger type multistage pressure-reducing noise-reducing valve core and single-seat control valve |
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